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WO2018210295A1 - 数据传输方法、接入网设备及终端 - Google Patents

数据传输方法、接入网设备及终端 Download PDF

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Publication number
WO2018210295A1
WO2018210295A1 PCT/CN2018/087243 CN2018087243W WO2018210295A1 WO 2018210295 A1 WO2018210295 A1 WO 2018210295A1 CN 2018087243 W CN2018087243 W CN 2018087243W WO 2018210295 A1 WO2018210295 A1 WO 2018210295A1
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WO
WIPO (PCT)
Prior art keywords
terminal
access network
network device
access
identifier information
Prior art date
Application number
PCT/CN2018/087243
Other languages
English (en)
French (fr)
Inventor
石小丽
甘久斌
周凯捷
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18801467.4A priority Critical patent/EP3611974A4/en
Priority to RU2019141050A priority patent/RU2767756C2/ru
Priority to AU2018269260A priority patent/AU2018269260B2/en
Publication of WO2018210295A1 publication Critical patent/WO2018210295A1/zh
Priority to US16/686,801 priority patent/US11229077B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • the present application relates to the field of wireless communications, and in particular, to a data transmission method, an access network device, and a terminal.
  • the base station as the primary base station may add the terminal and the secondary base station to the terminal.
  • the data link transfers data of some or all of the terminals to the secondary base station for transmission, that is, dual-connectivity (DC) is implemented for the terminal.
  • the secondary base station is determined by the primary base station according to the measurement information of the terminal to the at least one base station, but in the scenario where the base station signal coverage is not good, for example, the terminal is too far away from the base station, the terminal cannot feed back the measurement information to the primary base station, or Even if the terminal measures the base station, but the base station has a large interference, no suitable secondary base station performs data offload for the terminal.
  • the embodiment of the present application provides a data transmission method, an access network device, and a terminal.
  • the embodiment of the present application provides a data transmission method, including: a first terminal receives first indication information from a first access network device, where the first terminal accesses the first access network The first indication information is used to trigger the first terminal to connect to the second terminal; the first terminal connects to the second terminal according to the first indication information; the first terminal passes the second terminal The terminal performs data transmission with the second access network device, and the second access network device is configured to transmit data between the first access network device and the first terminal.
  • the first access network device serves as a primary node
  • the second access network device serves as a secondary node to jointly provide a data transmission service for the first terminal.
  • the first terminal is connected to the second terminal, and the first terminal performs data transmission by using the second terminal and the second access network device, so that the second access network device can serve as The secondary node offloads data between the first terminal and the first access network device, and improves communication quality of the first terminal.
  • the method further includes: the first terminal receiving, by the first access network device, identifier information of the first access network device; The terminal sends the identifier information to the second terminal, so that the second terminal sends the identifier information to the second access network device, where the identifier information is used by the second access network device
  • the first access network device requests to establish a communication link between the second access network device and the first terminal.
  • the second access network device actively requests the first access network device as the secondary node, and the first access network device further establishes a dual connectivity link with the first access network device, and the first access network device does not need to be based on the first terminal.
  • the measurement information is used to select the secondary node.
  • the method further includes: receiving, by the first terminal, the first identifier information of the first access network device from the first access network device, and the The second identifier information of the first access network device that is adjacent to the network access device; the first terminal sends the first identifier information and the second identifier information to the second terminal, so that the second terminal The neighboring network device sends the second indication information, where the second indication information is used to indicate that the neighboring network access device determines whether to request the first access network device to establish the adjacency between the network access device and the first terminal. Communication link.
  • the secondary node (second access network device) is a neighboring access network device of the first access network device, avoiding no communication between the first access network device and the second access network device.
  • the interface cannot successfully establish a dual-link link, thereby improving the data offloading effect of the secondary node.
  • the method further includes: the first terminal receiving, by the second terminal, identification information of at least one access network device, where the at least one access network device Include the second access network device; the first terminal sends the identifier information of the at least one access network device to the first access network device, so that the first access network device requests to add
  • the second access network device is configured to transmit data between the first access network device and the first terminal.
  • the second terminal determines the identifier information of the at least one access network device that is sent to the first terminal.
  • the at least one access network device may include an access network device to which the current serving cell of the second terminal belongs, and may also include an access network device measured by the second terminal.
  • the method further includes: receiving, by the first terminal, the identifier information of the neighboring network access device of the first access network device from the first access network device; Sending, by the first terminal, the identifier information of the neighboring network access device to the second terminal, so that the second terminal determines the second access network device from the neighboring network access device; the first terminal Receiving, by the second terminal, the identifier information of the second access network device, where the first terminal sends the identifier information of the second access network device to the first access network device, so that the The first access network device requests to add the second access network device to transmit data between the first access network device and the first terminal.
  • the secondary node (second access network device) is a neighboring access network device of the first access network device, avoiding no communication between the first access network device and the second access network device.
  • the interface cannot successfully establish a dual-link link, thereby improving the data offloading effect of the secondary node.
  • the embodiment of the present application provides a data transmission method, including: a first access network device sends first indication information to a first terminal, where the first terminal accesses the first access network The first indication information is used to trigger the first terminal to connect to the second terminal, so that the first terminal performs data transmission by using the second terminal and the second access network device, where the second terminal
  • the network access device is configured to transmit data between the first access network device and the first terminal.
  • the method further includes: the first access network device sending the identifier information of the first access network device to the first terminal, so that the The second access network device receives the identifier information from the first terminal by using the second terminal, where the identifier information is used by the second access network device to request the first access network device Establishing a communication link between the second access network device and the first terminal.
  • the method further includes: the first access network device sending the first identifier information of the first access network device to the first terminal, and the The second identification information of the first access network device adjacent to the network access device, so that the neighboring network access device receives the second indication information from the first terminal by using the second terminal, where the second indication The information is used to indicate that the neighboring network access device determines whether to request the first access network device to establish a communication link between the adjacency network access device and the first terminal.
  • the method further includes: the first access network device receiving, by the first terminal, identification information of at least one access network device, the at least one access The second access network device is included in the network device; the first access network device determines the second access network device from the at least one access network device; the first access network device requests Adding the second access network device to transmit data between the first access network device and the first terminal.
  • the method further includes: sending, by the first access network device, the identifier information of the neighboring network access device of the first access network device to the first terminal;
  • the second terminal receives the identification information of the neighboring network access device from the first terminal, and determines the second access network device from the neighboring network access device;
  • the first access network device passes the Receiving, by the first terminal, identifier information of the second access network device from the second terminal; the first access network device requesting to add the second access network device to transmit the first access network Data between the device and the first terminal.
  • the embodiment of the present application provides a data transmission method, including: a second terminal is connected to a first terminal, where the first terminal accesses a first access network device; and the second terminal determines a second An access network device, where the second access network device is configured to transmit data between the first access network device and the first terminal.
  • the method further includes: the second terminal receiving, by the first terminal, identifier information of the first access network device; The second access network device sends the identifier information, where the identifier information is used by the second access network device to request the first access network device to establish the second access network device and device A communication link between the first terminals.
  • the method further includes: receiving, by the second terminal, the first identifier information of the first access network device and the first interface from the first terminal And the second terminal sends the indication information to the neighboring network access device, where the indication information is used to indicate that the neighboring network access device determines whether to the first access network.
  • the device requests to establish a communication link between the adjacency network access device and the first terminal.
  • the method further includes: the second terminal sending, to the first terminal, identifier information of at least one access network device, where the at least one access network device Include the second access network device, such that the first access network device receives the identification information of the at least one access network device from the first terminal and requests to add the second access network device to Transmitting data between the first access network device and the first terminal.
  • the method further includes: receiving, by the second terminal, the identifier information of the neighboring network access device of the first access network device from the first terminal; Determining, by the second terminal, the second access network device includes: the second terminal determining the second access network device from the neighboring network access device; and the second terminal sending the second connection to the first terminal And the identifier information of the network access device, so that the first access network device receives the identifier information of the second access network device from the first terminal, and requests to add the second access network device to transmit the Data between the first access network device and the first terminal.
  • the embodiment of the present application provides a data transmission method, including: a second access network device receives, by using a second terminal, identifier information of a first access network device from a first terminal, where the first terminal Accessing the first access network device, the first terminal is connected to the second terminal; the second access network device requests the first access network device to establish the second access network device And a communication link between the first terminal and the first terminal, where the communication link is used to transmit data between the first access network device and the first terminal.
  • the first terminal may be a drone terminal; and the second terminal may be a ground terminal, and the device to device is established between the first terminal and the second terminal (device to Device, D2D) link.
  • the first access network device may be a base station having communication capability with a UAV terminal, for example, may be a UAV dedicated base station; and the The two access network devices can be any type of base station.
  • the embodiment of the present application provides a device, where the device has a first access network device in any one of the foregoing data transmission methods, or has a second access network in any one of the foregoing data transmission methods.
  • the function of device behavior may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more units or means corresponding to the functions described above.
  • an embodiment of the present application provides an access network device, including a processor and a transceiver, where the processor is configured to support an access network device to perform the first access network device or the first data transmission method. The corresponding functions of the two access network devices.
  • the transceiver is configured to support communication between the access network device and the terminal, and send information or instructions involved in the foregoing data transmission method to the terminal.
  • the access network device can also include a memory for coupling with the processor that retains the necessary program instructions and data for the access network device.
  • the access network device can also include a communication interface for communicating with other network devices.
  • the access network device is a base station.
  • the embodiment of the present application provides a device, where the device has the function of implementing the first terminal in any one of the foregoing data transmission methods or having the second terminal behavior in any one of the foregoing data transmission methods.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more units or means corresponding to the functions described above.
  • an embodiment of the present application provides a terminal.
  • the structure of the terminal includes a processor and a transceiver, and the processor is configured to support the terminal to perform a corresponding function of the first terminal or the second terminal in the foregoing data transmission method.
  • the transceiver is configured to support communication between the access network device and the terminal, and send information or instructions involved in the foregoing data transmission method to the access network device.
  • the terminal may also include a memory for coupling with the processor, which stores program instructions and data necessary for the terminal.
  • a ninth aspect the embodiment of the present invention provides a communication system, including the first access network device and the second access network device, which are described in the foregoing aspects.
  • the terminal described in the above aspect may also be included in the communication system.
  • the embodiment of the present application provides a computer readable storage medium, where the computer readable storage medium stores instructions, when executed on a computer, causing the computer to perform data transmission according to any of the above aspects. method.
  • an embodiment of the present application provides a computer program product comprising instructions, when executed on a computer, causing a computer to perform the data transmission method of any of the above aspects.
  • the embodiment of the present application provides a chip, which can perform the data transmission method described in any of the above aspects.
  • the first terminal is connected to the second terminal, and the second terminal and the second access network device perform data transmission, so that the first terminal is respectively connected to the first access network device and a second access network device, where the first access network device serves as a master node, and the second access network device can serve as a secondary node for offloading data between the first terminal and the first access network device, thereby improving The communication quality of the first terminal.
  • the first terminal is in a flight state drone terminal, the drone terminal establishes a D2D link with the ground terminal, and then performs dual-connection communication with the ground base station to meet its data communication requirement.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a data transmission method according to an embodiment of the present application.
  • 3-1 is a schematic flowchart of a data transmission method according to an embodiment of the present application.
  • 3-2 is a schematic flowchart of a data transmission method according to an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a data transmission method according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of an apparatus 500 according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a device 600 according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a device 700 according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of an apparatus 800 according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of an access network device 900 according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a terminal 1000 according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of a communication system 1100 according to an embodiment of the present application.
  • 4G the fourth generation
  • New RAN new radio access network
  • eLTE evolved LTE
  • 5G the fifth generation
  • next-generation communication systems such as 4G (the fourth generation) system, the new radio access network (New RAN, NR), and evolved LTE (evolved LTE).
  • 4G the fourth generation
  • New RAN new radio access network
  • eLTE evolved LTE
  • 5G the fifth generation
  • the access network device in the embodiment of the present application includes an access network side device in the NR, such as a gNB, a trasmission point (TRP), or a centralized unit (CU) and a distributed unit (distributed)
  • the base station device in the long term evolution (LTE) system that is, the evolved node B (eNB) is connected to the 5G core network (5G-Core, 5G CN)
  • the LTE eNB may also be referred to as an eLTE eNB.
  • the eLTE eNB is an LTE base station device that is evolved on the basis of the LTE eNB, and can directly connect to the 5G CN.
  • the eLTE eNB also belongs to the base station device in the NR.
  • the access network device may also be an evolved NodeB (eNB) in an LTE system.
  • the access network device may also be an access point (AP), or other network device having the capability of communicating with the terminal and the core network.
  • the type of the access network device is not limited in this embodiment of the present application.
  • the terminal involved in the embodiments of the present application may include a handheld device having a wireless communication function, an in-vehicle device, a wearable device, a computing device, an aerospace device, or other processing device connected to the wireless modem, and various forms of user equipment ( User equipment, UE), mobile station (MS), terminal equipment, etc.
  • the aerospace equipment can be a drone or other flight equipment with a communication module.
  • the drone can also be called a drone UE or an unmanned aerial vehicle (UAV).
  • the embodiment of the present application defines that the one-way communication link of the access network to the terminal is a downlink, the data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called a downlink direction; and the terminal to the access network
  • the one-way communication link is an uplink, and the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is called an uplink direction.
  • the resources described in this embodiment are transmission resources, including time domain resources and frequency domain resources, and can be used to carry data or signaling in an uplink communication process or a downlink communication process.
  • the D2D described in the embodiment of the present application is a technology that can realize direct communication between terminals at a short distance.
  • the terminal can access the wireless network through another terminal and maintain a connection with the wireless network.
  • a D2D link can be established between two terminals by using technologies such as Bluetooth and WIFI.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • Multiple appearing in the embodiments of the present application means two or more.
  • connection in the embodiment of the present application refers to various connection modes such as a direct connection or an indirect connection, so as to implement communication between devices, which is not limited in this embodiment.
  • the "network” and the “system” appearing in the embodiment of the present application express the same concept, and the communication system is a communication network.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application.
  • the communication network shown in FIG. 1 includes a first access network device 110 and a second access network device 120.
  • the cell managed by the first access network device 110 is referred to as a first cell, and the second access network device 120 is The managed cell is called the second cell.
  • the first cell and the second cell may have overlapping areas as shown in FIG. 1, or not shown in FIG. 1, and the second cell may be within the range of the first cell.
  • the first terminal 130 accesses the first access network device 110, and the second terminal 140 accesses the second access network device 120.
  • the first terminal performs D2D communication with the second terminal.
  • the second terminal 140 serves as a relay terminal of the first terminal 130, and connects the first terminal 130 to the second access network device 120.
  • There is a communication interface between the first terminal 130 and the second terminal 140 such as the PC5 interface shown in FIG.
  • There is a communication interface between the second terminal 140 and the second access network device 120 such as the Uu interface shown in FIG.
  • the first terminal 130 establishes a control plane (CP) in the first access network device 110, and performs user plane (UP) data transmission with the first access network device 110. Since the location of the first terminal 130 changes with the mobility, if the first terminal moves from the near end to the far end of the first access network device 110, as shown in FIG. 1, the first terminal moves from the first cell to the second. When the cell moves, the first terminal 130 gradually moves away from the signal coverage of the first access network device 110, and the quality of the air interface between the first terminal 130 and the first access network device 110 may deteriorate.
  • CP control plane
  • UP user plane
  • the first terminal 130 may access the second access network device 120 through the second terminal 140 on the premise of maintaining communication with the first access network device 110, so that the first terminal 130 and the first terminal An access network device 110 and a second access network device 120 implement a dual connection, where the first access network device 110 serves as a master node (MN) and the second access network device 120 serves as a secondary node (secondary Node, SN), transferring part or all of the data of the first terminal 130 from the first access network device to the second access network device for transmission.
  • MN master node
  • secondary Node secondary Node
  • dual connectivity has different implementations, or different distribution methods for terminal data.
  • the secondary node can establish a user plane connection with the terminal and the core network respectively, and in the downlink direction, the downlink data that is sent by the core network can be offloaded in the Packet Data Convergence Protocol (PDCP) layer of the primary node.
  • PDCP Packet Data Convergence Protocol
  • the secondary node sends the downlink data to the terminal; in the uplink direction, the secondary node receives the uplink data from the terminal, and the secondary node sends the received uplink data to the primary node, and the primary node aggregates the uplink data and sends the uplink data.
  • this dual connection mode can be called a split bearer (or 3C type).
  • the secondary node establishes a user plane connection and a data plane connection with the core network, and the secondary node and the terminal only establish a data plane connection, and in the downlink direction, the secondary node can directly receive downlink data from the core network and send the data to the terminal; In the direction, the secondary node can directly send the uplink data received from the terminal to the core network.
  • the dual connectivity mode can be called a secondary cell group bearer (SCG bearer) (or 1A type). It can be understood that in any dual connectivity mode, the master node and the core network have a control plane and a user plane connection, and the master node and the terminal have a control plane and a user plane connection.
  • the 3C type means that the terminal data is offloaded at the primary base station, and the 1A type means that the terminal data is offloaded in the core network.
  • the secondary node may be used to transmit part or all of the service-related data of the terminal.
  • the data of the part of the service is transmitted by the primary node, and the data of the remaining services is transmitted by the secondary node, which is not limited in this embodiment.
  • one terminal can access the primary node and multiple secondary nodes at the same time, and each secondary node can separately transmit part of the user plane data of the terminal, and the dual connection can also be called multi-connectivity.
  • the first terminal is a drone terminal in a flight state
  • the second terminal is a ground terminal
  • the first access network device is a base station having the capability of communicating with the drone terminal, for example A dedicated base station or a normal base station that manages the drone terminal
  • the second access network device is any type of base station, such as a normal base station.
  • the dedicated base station has full communication capability for the UAV terminal in the near-end range, and low-rate data and signaling communication capability for the UAV terminal in the remote range, wherein the near-end range and the far-end range can be Whether the signal quality in the corresponding space can make the communication quality of the UE reach a certain threshold is divided, for example, a space with a geographical radius of 20 kilometers and a space with a vacant radius of 3 kilometers can be regarded as a remote range.
  • the dedicated base station can function as a common ground base station.
  • the common base station has the function of a common ground base station and the complete communication capability for the drone terminal in the near-end range, and the ordinary base station can also serve as a data plane relay node of the high altitude unmanned terminal.
  • the UAV terminal cannot directly measure the base station located on the ground, or, when the station spacing of the base station may be far, and the UAV terminal cannot measure the appropriate base station, The UAV terminal cannot feed back the measurement information to the primary base station, and the dedicated station cannot select a suitable secondary base station for the UAV terminal. Or, if the UAV terminal is in a strong interference area of a plurality of base stations, even if the UAV terminal can measure the base station, since the interference is large, the measured base station cannot directly serve as the secondary base station to the UAV terminal. The data is shunted.
  • FIG. 2 is a schematic flowchart of a data transmission method according to an embodiment of the present application. This method can be applied to the communication system shown in FIG. 1.
  • the method comprises the following steps:
  • the first access network device sends the first indication information to the first terminal, where the first terminal accesses the first access network device, and the first indication information is used to trigger the first terminal. Connect to the second terminal.
  • the first terminal accessing the first access network device includes: the first terminal establishes a communication connection with the first access network device, and the first terminal can perform data transmission with the first access network device.
  • the first indication information is used to trigger the first terminal to connect to the second terminal, the first terminal information may be used to indicate that the first terminal performs a discovery process, and the first terminal uses the discovery process to send the second terminal. Determined as a relay terminal.
  • the first access network device may further send a dual connectivity data transmission request to the first terminal. Specifically, the first access network device determines whether to perform dual connectivity for the first terminal according to current load conditions, bandwidth, cell throughput, and the like, and sends a request for dual connectivity data transmission to the first terminal, so that the first The terminal sends the request to the second base station by using the second terminal, and the second base station may perform a dual connection establishment process with the first base station according to the request.
  • the first access network device may send the first indication information to the first terminal by using a message sent by the access network device to the terminal, for example, in a radio resource control (RRC) connection.
  • the re-configuration message includes the first indication information, and may also set a dedicated message for the first indication information, which is not limited in this embodiment of the present application.
  • S202 The first terminal connects to the second terminal according to the first indication information.
  • the discovery process may be performed by using any one of the prior art, so that the first terminal is connected to the second terminal, which is not limited in this embodiment of the present application.
  • the discovery process may be directly initiated by the first terminal, that is, the mode B (modeB) discovery mode is used, and the first terminal sends a request message to at least one terminal in the measurement range, that is, the candidate relay terminal. If the terminal accepts the request of the first terminal, the terminal sends a response message to the first terminal, thereby completing the discovery process. After the discovery process is completed, the first terminal may establish a communication link with the second terminal.
  • modeB mode B
  • the first terminal may notify the first access network device after the discovery fails.
  • the first terminal may notify the first base station to discover the failure through the RRC completion message, or notify the first base station by using other newly added dedicated messages or existing messages, which is not limited in this embodiment of the present application.
  • S203 The first terminal performs data transmission by using the second terminal and the second access network device, where the second access network device is configured to transmit data between the first access network device and the first terminal. .
  • the second access network device may serve as a secondary node, and offload data between the first access network device and the first terminal.
  • the first terminal may send uplink data to the second access network device by using the second terminal, and the second access network device transmits the uplink data to the core network, or the second access network device sends the uplink data to the first access.
  • the network device is further transmitted by the first access network device to the core network; the first access network device may also distribute part or all of the downlink data sent by the core network to the second access network device, or the second The access network device directly receives downlink data from the core network, and then the second access network device sends the downlink data to the first terminal through the second terminal.
  • the second access network device may have one or more, and the first access network device as the primary node may be connected to one or more secondary nodes.
  • the method further includes: the first access network device sends the identifier information of the first access network device to the first terminal.
  • the first terminal may send the identifier information of the first access network device to the second terminal, so that the second terminal may send the identifier information of the first access network device to the second access network device, where
  • the access network device requests the first access network device to establish a communication link between the second access network device and the first terminal.
  • the communication link may also be referred to as a data communication link, where the communication link includes three nodes: a first terminal, a second terminal, and a second access network device, where the second access network device can pass through
  • the communication link performs data transmission with the first terminal.
  • the link between the first terminal and the second terminal is a D2D link.
  • the identifier information of the first access network device and the first indication information are both included in the same or different messages sent by the first access network device to the first terminal, where This is not limited.
  • the first terminal sends the identifier information of the first access network device to the second terminal by using the discovery message, and is sent by the second terminal to the second access network device to which the second terminal belongs.
  • the discovery message is a general name of a message that the first terminal interacts with the second terminal in the discovery process.
  • the first terminal may carry the first access network in a solicitation message sent to the second terminal. Identification information of the device.
  • the identifier information of the first access network device may be a cell identifier, such as a physical cell identity (PCI), or other identifier information of an access network device that can be identified by the second access network device.
  • PCI physical cell identity
  • the application embodiment does not limit this.
  • the method further includes: receiving, by the first terminal, identifier information of the first access network device from the first access network device, and the first Identification information of the neighboring network access device of the access network device.
  • the first terminal may send the identifier information of the first access network device and the identifier information of the neighboring network access device to the second terminal.
  • the second terminal may send the second indication information to the corresponding neighboring network access device, where the second indication information is used to indicate that the neighboring network access device determines whether to request the establishment of the first access network device.
  • a communication link between the adjacent network device and the first terminal is described.
  • the first access network device may determine at least one candidate secondary node, where the candidate secondary node may be an access network device that has a communication interface with the first access network device.
  • the first access network device sends the secondary node information to the first terminal, where the secondary node information may be the identification information of a group of access network devices.
  • the candidate secondary node is an adjacency network access device of the first access network device.
  • the first access network device obtains the neighboring cell list by using the neighboring cell relationship, and sends the identifier information of the access network device corresponding to the neighboring cell list to the first terminal.
  • the discovery message sent by the first terminal to the second terminal includes not only identifier information of the first access network device but also identifier information of the neighboring network access device.
  • the second terminal sends the indication information to each neighboring network access device.
  • the neighboring network device determines whether to establish a dual-connection link with the first access network device, if the neighboring network access device determines When the dual connection is made, a request message is sent to the first access network device, requesting to establish a communication link between the adjacent network access device and the first terminal. If the first access network device receives the request message of the multiple neighboring network devices, the first access network device may determine one or more adjacent network access devices as the secondary nodes according to the signal quality and the like.
  • the second indication information that is sent by the second terminal to the neighboring network access device may be the identifier information of the first access network device, that is, the identifier of the first access network device is used to trigger the neighboring network access device to determine whether it is the first
  • the access network device performs dual connectivity; or the second indication information may include the identifier information of the first access network device and the displayed indication, and the displayed indication triggers the neighboring network access device to determine whether to connect with the first access network device.
  • the specific content of the second indication information is not limited in the embodiment of the present application.
  • the second terminal selects one candidate secondary node from the at least one candidate secondary node determined by the first access network device, and sends the identifier information of the first access network device to the secondary node.
  • the second terminal receives the identification information of the at least one adjacent network access device of the first access network device from the first terminal, and selects one access network device with the highest signal strength as the candidate auxiliary among the at least one adjacent network access device.
  • the node sends the identification information of the first access network device to the candidate secondary node, and the candidate secondary node determines whether to establish a dual connectivity link with the first access network device.
  • the method further includes: the first terminal receiving, by the second terminal, identifier information of at least one access network device; and further, the first terminal The first access network device sends the identifier information of the at least one access network device, where the first access network device may determine the second access network device from the at least one access network device, requesting to add The second access network device transmits data between the first access network device and the first terminal.
  • the requesting, by the first access network device, the second access network device includes: sending, by the first access network device, a secondary node increase request message to the second access network device.
  • the second terminal may carry the identification information of the at least one candidate secondary node determined by the second terminal in the discovery message sent to the first terminal. . Further, the first terminal sends the identifier information of the candidate secondary node to the first access network device, and the first access network device determines, from the candidate secondary node, the second access network device as the secondary node.
  • the candidate secondary node determined by the second terminal may be the access network device that the second terminal can measure or the signal quality of the access network device measured by the second terminal exceeds a certain value.
  • One or more access network devices of the threshold if the second terminal is in the connected state, the candidate secondary node determined by the second terminal is the access network device to which the primary serving cell of the second terminal belongs.
  • the method further includes: receiving, by the first terminal, the identifier information of the neighboring network access device of the first access network device from the first access network device; Further, the first terminal sends the identifier information of the neighboring network access device to the second terminal, so that the second terminal determines the second access network device from the neighboring network access device; The first terminal receives the identifier information of the second access network device from the second terminal, and sends the identifier information of the second access network device to the first access network device, where the first The access network device may request to add the second access network device to transmit data between the first access network device and the first terminal.
  • the first terminal when the first terminal performs the discovery process and determines the second terminal as the relay terminal, the first terminal carries the indication information of the candidate secondary node determined by the first access network device in the discovery message, where the indication information may be
  • the identifier information of the access network device is not limited to the identifier information of the access network device corresponding to the neighboring cell list of the first access network device.
  • the second terminal may select one candidate secondary node from the candidate secondary nodes.
  • the second terminal may select according to current measurement information or other information related to the access network device.
  • the second terminal may determine whether an access network device (hereinafter referred to as a “service access network device”) to which the current primary serving cell of the second terminal belongs is in the range of the candidate secondary node, and if yes, the second The terminal determines the serving access network device as the secondary node, and the second terminal sends a response message to the first terminal, where the response message includes the identifier information of the serving access network device. If the serving access network device of the second terminal is not in the range of the candidate secondary node, the second terminal sends the indication information of the suitable secondary node to the first terminal.
  • a service access network device hereinafter referred to as a “service access network device”
  • the first terminal receives the first indication information from the first access network device, where the first terminal accesses the first access network device, and the first indication The information is used to trigger the first terminal to connect to the second terminal; the first terminal connects to the second terminal according to the first indication information; the first terminal performs the second terminal and the second access network device Data transmission, the second access network device is configured to transmit data between the first access network device and the first terminal, where the first access network device acts as a master node, and the second access network device acts as The secondary node provides data transmission service for the first terminal at the same time, which improves the communication quality of the first terminal.
  • the data transmission method provided by the embodiment of the present application is further explained and illustrated by taking the UAV communication scenario as an example.
  • the first terminal is a drone terminal (hereinafter referred to as "terminal 1")
  • the second terminal is a ground terminal (hereinafter referred to as "terminal 2")
  • the first access network device is a dedicated base station for the drone (hereinafter referred to as The "base station 1")
  • the second access network device is a normal base station (hereinafter referred to as "base station 2”), wherein the drone terminal has access to the unmanned private base station.
  • the first access network device may also be a common base station having the capability of communicating with the drone, and is not limited to a dedicated base station for the drone; the second access network device may also be an unmanned
  • the dedicated base station is not limited to a common base station, and the following description is merely illustrative and does not constitute any limitation on the present application.
  • 3-1 is a schematic diagram of a signaling flow of a data transmission method provided by an embodiment of the present application.
  • the method includes the following steps:
  • the base station 1 sends the discovery indication information to the terminal 1.
  • the discovery indication information is used to indicate that the terminal 1 discovers a ground terminal that may be a relay terminal.
  • the base station 1 transmits the identification information of the base station 1 to the terminal 1.
  • S301 and S302 do not have a sequence of execution, and may execute S301 first, and then execute S302; or S302 may be performed first, and then S301; or S301 and S302 may be performed at the same time, for example, carrying the foregoing discovery indication information in the same message and Identification information of the base station 1.
  • This embodiment of the present application does not limit this.
  • the base station 1 also sends a dual-connection data transmission request to the terminal 1.
  • a dual-connection data transmission request refers to related content in the embodiment shown in FIG. 2, and details are not described herein.
  • the terminal 1 determines the terminal 2 as a relay terminal.
  • the terminal 1 After receiving the discovery indication information, the terminal 1 performs a discovery process on the terminal 2, and determines that the terminal 2 is suitable as a relay terminal.
  • the discovery process For a detailed description of the discovery process, reference may be made to the related content in the embodiment shown in FIG. 2, and details are not described herein.
  • the terminal 1 transmits the identification information of the base station 1 to the terminal 2.
  • the identifier information of the base station 1 is included in a discovery message sent by the terminal 1 to the terminal 2, and the discovery message is, for example, a solicitation message.
  • the terminal 2 transmits the identification information of the base station 1 to the base station 2.
  • the base station 2 may be the base station to which the serving cell of the terminal 2 belongs, or may be the base station suitable for access determined by the terminal 2, for example, the base station with the strongest signal strength, which is not limited in this application. It can be understood that there may be multiple base stations in the measurement range of the terminal 2, and the terminal 2 may separately measure each base station, select the base station with the best signal quality as the candidate secondary base station, and send the identification information of the base station 1 to the candidate secondary base station. .
  • the identifier information of the base station 1 may be included in an RRC message sent by the terminal 2 to the base station 2, such as an RRC connection reconfiguration complete message, or may be transmitted through other messages.
  • the terminal 2 and the base station 2 first need to establish an RRC connection, and the terminal 2 transmits the identification information of the base station 1 to the base station 2 through an RRC message.
  • the terminal 2 may transmit the identifier information of the base station 1 by using a new dedicated message or other existing message, which is not limited in this embodiment of the present application.
  • the terminal 2 may also send a trigger indication to the base station 2 to establish a dual connection.
  • the terminal 1 may send the request to the terminal 2, and the terminal 2 transmits the request to the base station 2; or the terminal 2 generates a dual connection establishment indication based on the request.
  • the specific form of the trigger indication of the dual connection is not limited in the embodiment of the present application.
  • the base station 2 requests the base station 1 to establish a communication link between the base station 2 and the terminal.
  • the base station 2 can identify the base station 1 by using the identifier information of the base station 1, and further send a request message to the base station 1, for example, a secondary eNB/secondary gNB addition required (SeNB/SgNB addition required) message, and request the base station 1 Become a secondary base station to establish a communication link between the base station 2 and the terminal.
  • the SeNB indicates the secondary base station in the LTE system
  • the SgNB indicates the secondary base station in the NR, which is exemplified herein.
  • S307 The base station 1 and the base station 2 perform a dual connection establishment process.
  • the base station 1 After receiving the request message of the base station 2, the base station 1 determines whether the base station 2 is suitable as a secondary base station. If the base station 1 determines that the base station 2 can serve as the secondary base station, it initiates a dual connection establishment procedure to the base station 2.
  • the dual connection establishment process includes: the base station 1 sends a secondary base station setup request (SeNB/SgNB addition request) message to the base station 2, requesting to establish a dual connectivity link with the base station 2.
  • the base station 2 transmits a SeNB/SgNB addition acknowledge (SeNB addition ACK) message or a secondary base station connection response (SeNB/SgNB addition response) message to the base station 1.
  • SeNB/SgNB addition acknowledge SeNB/SgNB addition acknowledge
  • SeNB/SgNB addition response secondary base station connection response
  • the base station 2 transmits configuration information to the terminal 1.
  • a dual connectivity link is established between the base station 1 and the base station 2.
  • the foregoing configuration information may include any one or more of the following information: bearer information, including identifier information of the bearer to be established, such as an EUTRAN radio access bearer identity (eRAB ID), and a data radio bearer. , DRB) identifier, etc.; tunnel endpoint identifier (TEID); quilty of service (QoS) information, including QoS class identifier (QCI), allocation and retention priority , ARP) and other parameters; the shunt type indication, for example, to indicate that the shunt type is a split bearer or an SCG bearer.
  • the configuration information may further include information such as a flow identity (flow ID), a session identity (session ID), and the like.
  • S308 The base station 2 allocates communication resources to the terminal 2.
  • the terminal 2 requests the base station 2 for communication resource allocation, or the base station 2 actively initiates resource allocation to the terminal 2.
  • the terminal sends an indication information to the base station to which it accesses, notifying the base station that the terminal needs to perform D2D communication, and then the base station determines which resource allocation mode to use (for example, Mode 1 or Mode 2), the terminal is notified by signaling. If the terminal is instructed to use the resource allocation mode of mode 2, the base station will allocate a dedicated resource pool to the terminal through dedicated signaling. If the terminal is instructed to use the resource allocation mode of mode 2, the terminal directly uses the stored resource pool to transmit data.
  • the resource allocation mode to use for example, Mode 1 or Mode 2
  • the terminal 1 performs one-to-one communication with the terminal 2.
  • the terminal 2 After the terminal 2 acquires the communication resources allocated by the base station 2, it can perform D2D communication with the terminal 1, or is called a one-to-one communication, and details are not described herein.
  • the terminal 1 performs data transmission with the base station 2 through the terminal 2.
  • the terminal 1 since the terminal 1 establishes a communication link with the base station 1 and the base station 2, the base station 1 functions as a primary base station, and the base station 2 functions as a secondary base station, and performs dual-connection communication with the terminal 1.
  • the data transmission between the terminal 1 and the base station 2 is performed by the terminal 2.
  • the uplink data sent by the terminal 1 is transmitted to the base station 2 through the terminal 2, or the downlink data of the terminal 1 is sent by the base station 2 to the terminal 2, and then transmitted by the terminal 2.
  • terminal 1 do not go into details.
  • S302 may be replaced by S302', where S302' includes: base station 1 may send identity information of base station 1 and secondary base station range indication information to terminal 1. .
  • the secondary base station range indication information may specifically be a set of base station identifiers. Specifically, if a communication interface cannot be established between the ordinary base station and the private base station, for example, in the case where the distance between the private base station and the ordinary base station is too far, in order to enable the dual connection to be established successfully, the dedicated base station can be directed to the drone terminal. Indicates the range of the secondary base station.
  • the base station indicated by the range of the secondary base station may be a base station corresponding to the neighbor relationship list obtained by the private base station through the neighbor relationship, that is, the neighbor base station of the dedicated base station. Subsequently, the private base station transmits the secondary base station range indication information to the drone terminal.
  • S304 may be replaced by S304', and S304' includes: terminal 1 transmitting identification information of base station 1 and said secondary base station range indication information to terminal 2.
  • the terminal 2 transmits the identification information of the base station 1 to the base station indicated by the secondary base station range indication information including the base station 2.
  • the UAV terminal performs a discovery process, determines a ground terminal that is a relay terminal, and sends a discovery message carrying the indication information of the secondary base station to the ground terminal. After receiving the discovery message, the ground terminal sends the identification information of the dedicated station.
  • the candidate secondary base station decides whether to perform dual connectivity. If the candidate secondary base station decides to perform dual connectivity, it requests the private base station to establish a communication link between the candidate secondary base station and the unmanned terminal, that is, S306 is executed, and the candidate secondary base station is the base station 2. It can be understood that when a plurality of candidate secondary base stations respectively request the dedicated station to establish a communication link with the UAV terminal, the primary base station may elect to initiate a dual connection establishment procedure to one or more of the secondary base stations.
  • the secondary base station is within the range of the secondary base station indicated by the base station 1, for example, the neighboring base station of the base station 1, so that a reliable communication link can be established between the base station 1 and the finally determined secondary base station, and the communication of the secondary base station is improved. quality.
  • the terminal 2 may select, according to the signal strength of the base station indicated by the foregoing secondary base station range indication information, to send the identifier information of the base station 1 to one base station with the strongest signal strength, that is, the terminal 2 selects the most suitable one.
  • the identity information of the base station 1 is transmitted to the base station.
  • the UAV terminal performs data transmission with the ordinary base station through the ground terminal, and realizes dual connection between the UAV terminal and the dedicated base station and the ordinary base station, thereby improving the communication quality of the UAV terminal.
  • FIG. 4 is a schematic diagram of a signaling flow of a data transmission method according to an embodiment of the present application.
  • the method includes the following steps:
  • the base station 1 sends the discovery indication information to the terminal 1.
  • the base station 1 may send an RRC connection reconfiguration message including the discovery indication information to the terminal.
  • the terminal 1 determines the terminal 2 as a relay terminal.
  • step S303 For a detailed description of how to determine the relay terminal, reference may be made to step S303 in the embodiment of FIG. 3, and details are not described herein.
  • the terminal 2 sends the identifier information of the candidate secondary base station to the terminal 1.
  • the terminal 1 may transmit the identification information of the one or more candidate secondary base stations determined by the terminal 2.
  • the candidate secondary secondary base station includes one or more base stations that the terminal 2 can measure or the signal quality measured by the terminal 2 exceeds a certain threshold; when the terminal 2 is in the connected state, Then, the candidate secondary base station is a serving base station of the terminal 2.
  • the terminal 1 sends a discovery message including the request information of the added secondary base station to the terminal 2, for example, the terminal 2 is instructed to search for the candidate secondary base station by using a solicitaion message, and further, the terminal 2 is directed to the terminal. 1
  • the feedback information of the candidate secondary base station is fed back.
  • the terminal 2 sends the identification information of the secondary base station to the terminal 1 through the response message of the solicitaion message.
  • the discovery message sent by the terminal 1 to the terminal 2 does not include any indication message.
  • the terminal 2 actively sends the identification information of the candidate secondary base station to the terminal 1, that is, the discovery message triggers the terminal 2 to send a candidate to the terminal 1. Identification information of the secondary base station.
  • the terminal 1 notifies the base station 1, for example, the base station 1 is notified in the RRC complete message, and may be other messages, which is not limited in this embodiment of the present application.
  • S404 The terminal 1 sends the identifier information of the candidate secondary base station to the base station 1.
  • the identifier information of the candidate secondary base station is included in an RRC connection reconfiguration complete message sent by the terminal 1 to the base station 1.
  • the base station 1 determines a secondary base station (base station 2) from the candidate secondary base stations.
  • the base station 1 can determine the secondary base station according to conditions such as signal quality, and details are not described herein.
  • S406 The base station 1 and the base station 2 perform a dual connection establishment process.
  • the base station 2 allocates communication resources to the terminal 2.
  • the terminal 1 performs one-to-one communication with the terminal 2.
  • the terminal 1 performs data transmission with the base station 2 through the terminal 2.
  • the method further includes:
  • the base station 1 sends the secondary base station range indication information to the terminal 1.
  • the secondary base station range indication information may include the identifier information of the neighboring base station of the base station 1. For details, refer to related content in other embodiments of the present application, and no further details are provided.
  • S400 and S401 have no sequential execution sequence, and S400 may be executed first, and then S401 may be executed; S401 may be executed first, and then S400 may be executed; S400 and S401 may be simultaneously executed, for example, carrying the foregoing discovery indication information in the same message and
  • the secondary base station range indication information is not limited in this embodiment of the present application.
  • the method further includes S402a: the terminal 1 sends the secondary base station range indication information to the terminal 2.
  • S402b The terminal 2 determines the candidate secondary base station according to the secondary base station range indication information.
  • the secondary message includes the secondary base station range indication information
  • the relay terminal determines the candidate secondary base station.
  • the terminal 2 determines whether the serving base station is the base station indicated by the secondary base station range indication information, and if yes, the terminal 2 returns a discovery response message to the terminal 1, where the response message includes the serving base station.
  • the identification information that is, the serving base station of the terminal 2 can serve as a secondary base station.
  • the terminal 2 selects a base station according to the measurement information (for example, selects a base station to which the cell with the best signal quality belongs), and determines whether the selected base station is a secondary base station range indication.
  • the base station indicated by the information if yes, the terminal 2 returns a discovery response message to the terminal 1, and the response message includes the identification information of the selected base station. If the serving base station of the terminal 2 or the base station selected by the terminal 2 is not within the range of the base station indicated by the secondary base station range indication information, the terminal 2 notifies the terminal 1 that there is no suitable secondary base station.
  • the secondary base station is within the range of the base station indicated by the base station 1, for example, the neighboring base station of the base station 1, so that a reliable communication link can be established between the base station 1 and the finally determined secondary base station, and the communication quality of the secondary base station is improved.
  • the UAV terminal performs data transmission with the ordinary base station through the ground terminal, and realizes dual connection between the UAV terminal and the UAV dedicated station and the ordinary base station, thereby improving the communication of the UAV terminal. quality.
  • FIG. 3-1, FIG. 3-2, and FIG. 4 is an explanation and description of the data transmission method provided by the embodiment of the present application based on the embodiment shown in FIG. 2, and the embodiments provided by the present application can refer to each other. For the sake of simplicity of description, the same or similar concepts are not repeated.
  • FIG. 5 is a schematic structural diagram of an apparatus 500 according to an embodiment of the present application.
  • the device 500 is for a terminal device, which may be a drone terminal.
  • the apparatus 500 includes means or means for performing the steps performed by the first terminal in any of the method embodiments of the above method, and detailed descriptions about the steps may be applied to the present invention.
  • the apparatus 500 includes a first communication unit 501 and a second communication unit 502.
  • the first communication unit 501 may include a first receiving unit 5011 and a first transmitting unit 5012 for controlling reception and transmission, respectively.
  • the first communication unit 501 can receive and send a message through an interface (eg, an air interface) between a node of the access network (eg, the first access network device or the second access network device) and the terminal.
  • the second communication unit 502 can include a second receiving unit 5021 and a second transmitting unit 5022 for controlling reception and transmission, respectively.
  • the second communication unit 502 can receive and transmit a message through an interface (eg, an air interface) between the terminals.
  • the interface here is a logical concept.
  • the corresponding logical unit needs to be set to meet the protocol requirements of the corresponding interface, and the physical connection between the nodes may be a wireless connection.
  • the message or the information received by the first terminal from the access network node may be controlled and received by the first receiving unit 5011; the message or information sent by the first terminal to the access network node may pass through the first sending unit. 5012 controls the transmission.
  • the message or information received by the first terminal from the second terminal may be controlled to be received by the second receiving unit 5021; the message or information sent by the first terminal to the second terminal may be controlled to be sent by the second sending unit 5022.
  • the above first receiving unit 5011 or second receiving unit 5021 is a unit for controlling reception, and the information transmitted by the access network device or other terminal may be received by the receiving device of the terminal, such as an antenna and a radio frequency device.
  • the above first transmitting unit 5012 or second transmitting unit 5022 is a unit for controlling transmission, and can transmit information to an access network device or other terminals through a transmitting device of the terminal, such as an antenna and a radio frequency device.
  • the foregoing apparatus 500 further includes a connection unit 503, configured to connect to the second terminal according to the first indication information, where the first indication information is used to trigger the first terminal to connect to the second terminal, and then the first terminal Data transmission may be performed by the second terminal and the second access network device, where the second access network device is configured to transmit data between the first access network device and the first terminal.
  • a connection unit 503 configured to connect to the second terminal according to the first indication information, where the first indication information is used to trigger the first terminal to connect to the second terminal, and then the first terminal Data transmission may be performed by the second terminal and the second access network device, where the second access network device is configured to transmit data between the first access network device and the first terminal.
  • the second sending unit 5022 is configured to send the identifier information to the second terminal, so that the second terminal sends the identifier information to the second access network device, where the identifier
  • the information is used by the second access network device to request the first access network device to establish a communication link between the second access network device and the first terminal.
  • the first receiving unit 5011 is further configured to receive, by the first access network device, first identifier information of the first access network device and a neighboring network access device of the first access network device.
  • the second sending unit 5022 is further configured to send the first identifier information and the second identifier information to the second terminal, so that the second terminal sends the first terminal to the neighboring network access device.
  • the second indication information where the second indication information is used to indicate that the neighboring network access device determines whether to request the first access network device to establish communication between the second access network device and the first terminal link.
  • the first receiving unit 5011 is further configured to receive identifier information of the neighboring network access device of the first access network device from the first access network device, where the second sending unit 5022 is further configured to The second terminal sends the identifier information of the neighboring network access device, so that the second terminal determines the second access network device from the neighboring network access device; and the second receiving unit 5021 is further configured to use the The second terminal receives the identifier information of the second access network device, and the first sending unit 5012 is further configured to send the identifier information of the second access network device to the first access network device, so that the An access network device requests to add the second access network device to transmit data between the first access network device and the first terminal.
  • connection unit 503 connects the first terminal to the second terminal, and the first terminal accesses the second access network device by using the second terminal, refer to the foregoing method embodiment, and details are not described herein again.
  • other messages or information sent or received are not described in detail herein.
  • FIG. 6 is a schematic structural diagram of a device 600 according to an embodiment of the present application.
  • the device 600 is used in a first access network device, and the first access network device is located in a communication system, where the communication further includes a second access network device, where the first access network device functions as a primary node and The two access network devices jointly provide services for the terminal.
  • the apparatus 600 includes means or means for performing the steps performed by the first access network device in any of the method embodiments of the above method, and detailed descriptions regarding these steps are applicable. In the device embodiment.
  • the apparatus 600 includes a first communication unit 601 and a second communication unit 602.
  • the first communication unit 601 is configured to control communication between the access network devices (for example, the first access network device and the second access network device), and may include first receiving units 6011 and a second for controlling receiving and transmitting, respectively.
  • a transmitting unit 6012; the first communication unit 601 can receive and send a message through an interface between the access network devices (for example, an X2 interface, which can also be referred to as an Xn interface).
  • the second communication unit 602 is configured to control communication between the first access network device and the terminal, and may include a second receiving unit 6021 and a second sending unit 6022 for controlling receiving and transmitting, respectively; the second communication unit 602 may A message is received and transmitted through an interface (eg, an air interface) between the first access network device and the terminal.
  • the interface here is a logical concept. In the implementation, the corresponding logical unit needs to be set to meet the protocol requirements of the corresponding interface.
  • the physical connection between the nodes may be a wireless connection or a wired connection. For example, a wireless connection may be adopted between the access network device and the terminal, and a wired connection may be adopted between any two access network devices.
  • the message or information received by the first access network device from the other access network device may be controlled and received by the first receiving unit 6011; the first access network device Messages or information transmitted to other access network devices (e.g., second access network devices) may be controlled to be transmitted by the first transmitting unit 6012.
  • the message or the information received by the first access network device from the terminal can be controlled and received by the second receiving unit 6021; the message or information sent by the first access network device to the terminal can be controlled and sent by the second sending unit 6022.
  • the foregoing first receiving unit 6011 is a unit for controlling receiving, and can receive information sent by other access network devices by using a connection medium between the access network devices, such as an optical fiber.
  • the first sending unit 6012 is a unit for controlling transmission, and can send information to other access network devices by using a connection medium, such as an optical fiber, between the access network devices.
  • the above second receiving unit 6021 is a unit for controlling reception, and the information transmitted by the terminal can be received by a receiving device of the first access network device, such as an antenna and a radio frequency device.
  • the above second sending unit 6022 is a unit for controlling transmission, and can send information to the terminal through a transmitting device of the first access network device, such as an antenna and a radio frequency device.
  • the second sending unit 6022 is configured to send the first indication information to the first terminal, where the first indication information is used to trigger the first terminal to connect to the second terminal, so that the first terminal passes the second terminal.
  • the terminal performs data transmission with the second access network device, and the second access network device is configured to transmit data between the first access network device and the first terminal.
  • the second sending unit 6022 is further configured to send the identifier information of the first access network device to the first terminal, so that the second access network device passes the second terminal from the The first terminal receives the identifier information, where the identifier information is used by the second access network device to request the first access network device to establish the second access network device and the first terminal Communication link between.
  • the second sending unit 6022 is further configured to send the first identifier information of the first access network device and the second identifier information of the neighboring network access device of the first access network device to the first terminal.
  • the second indication information is used by the neighboring network device to receive the second indication information from the first terminal by using the second terminal, where the second indication information is used to indicate that the neighboring network access device determines whether to the first An access network device requests to establish a communication link between the adjacency network access device and the first terminal.
  • the apparatus 600 further includes: a determining unit 603.
  • the second receiving unit 6021 is configured to receive, by the first terminal, identifier information of at least one access network device, where the at least one access network device includes the second access network device;
  • the unit 603 is configured to determine the second access network device from the at least one access network device, where the first sending unit 6012 is configured to send a request message to the second access network device to request to add the first
  • the second access network device transmits data between the first access network device and the first terminal.
  • the first sending unit 6022 is further configured to send the identifier information of the neighboring network access device of the first access network device to the first terminal, so that the second terminal receives the location from the first terminal. Determining the identification information of the neighboring network access device and determining the second access network device from the neighboring network access device; and receiving, by the first terminal, the identification information of the second access network device from the second terminal.
  • the first sending unit 6012 is further configured to send a request message to the second access network device to request to add the second access network device to transmit the first access network device and the first terminal. data.
  • FIG. 7 is a schematic structural diagram of an apparatus 700 according to an embodiment of the present application.
  • the device 700 is for a terminal device, which may be a ground terminal.
  • the apparatus 700 includes: a unit or a means for performing the steps performed by the second terminal in any of the method embodiments of the above method, and the detailed description about these steps can be applied to the present invention.
  • Device embodiment the apparatus 700 includes a first communication unit 701 and a second communication unit 702.
  • the first communication unit 701 may include a first receiving unit 7011 and a first transmitting unit 7012 for controlling reception and transmission, respectively.
  • the first communication unit 701 can receive and send a message through an interface (eg, an air interface) between a node of the access network (eg, the first access network device or the second access network device) and the terminal.
  • an interface eg, an air interface
  • the second communication unit 702 can include a second receiving unit 7021 and a second transmitting unit 7022 for controlling reception and transmission, respectively.
  • the second communication unit 702 can receive and transmit a message through an interface (eg, an air interface) between the terminals.
  • the interface here is a logical concept. In the implementation, the corresponding logical unit needs to be set to meet the protocol requirements of the corresponding interface, and the physical connection between the nodes may be a wireless connection.
  • the message or information received by the second terminal from the access network node may be controlled and received by the first receiving unit 7011; the message or information sent by the second terminal to the access network node may pass through the first sending unit. 7012 control sends.
  • the message or information received by the second terminal from the first terminal may be controlled to be received by the second receiving unit 7021; the message or information sent by the second terminal to the first terminal may be controlled to be sent by the second sending unit 7022.
  • the above first receiving unit 7011 or second receiving unit 7021 is a unit for controlling reception, and the information transmitted by the access network device or other terminal may be received by the receiving device of the terminal, such as an antenna and a radio frequency device.
  • the above first transmitting unit 7012 or second transmitting unit 7022 is a unit for controlling transmission, and can transmit information to an access network device or other terminals through a transmitting device of the terminal, such as an antenna and a radio frequency device.
  • the apparatus 700 further includes a processing unit 703, configured to determine a second access network device, where the second access network device is configured to transmit data between the first access network device and the first terminal.
  • the second receiving unit 7021 is configured to receive the identifier information of the first access network device from the first terminal, where the first sending unit 7012 is configured to send the identifier to the second access network device.
  • the identification information wherein the identifier information is used by the second access network device to request the first access network device to establish a communication link between the second access network device and the first terminal .
  • the second receiving unit 7021 is configured to receive, by the first terminal, the first identifier information of the first access network device and the second identifier information of the neighboring network access device of the first access network device.
  • the first sending unit 7012 is configured to send the indication information to the neighboring network access device, where the indication information is used to indicate that the neighboring network access device determines whether to request the first access network device to establish the neighboring network access device and a communication link between the first terminals.
  • the second sending unit 7022 is configured to send, to the first terminal, identifier information of at least one access network device, where the at least one access network device includes the second access network device, so that Receiving, by the first access network device, identification information of the at least one access network device from the first terminal, and requesting to add the second access network device to transmit the first access network device and the Data between the first terminals.
  • the second receiving unit 7021 is configured to receive, from the first terminal, identifier information of the neighboring network access device of the first access network device, where the processing unit 703 is configured to determine, by the neighboring network access device a second access network device; the second sending unit 7022, configured to send the identifier information of the second access network device to the first terminal, so that the first access network device is from the first terminal Receiving identification information of the second access network device and requesting to add the second access network device to transmit data between the first access network device and the first terminal.
  • FIG. 8 is a schematic structural diagram of an apparatus 800 according to an embodiment of the present application.
  • the device 800 is used for a second access network device, and the second access network device is located in a communication system, where the communication further includes a first access network device, the first access network device serves as a primary node, and the first node serves as a secondary node.
  • the two access network devices jointly provide services for the terminal.
  • the apparatus 800 includes means or means for performing the steps performed by the second access network device in any of the method embodiments of the above method, and detailed descriptions regarding these steps are applicable. In the device embodiment.
  • the device 800 includes a first communication unit 801 and a second communication unit 802.
  • the first communication unit 801 is configured to control communication between the access network devices (for example, the first access network device and the second access network device), and may include first receiving units 8011 and the first for controlling receiving and transmitting, respectively.
  • a transmitting unit 8012; the first communication unit 801 can receive and send a message through an interface between the access network devices (for example, an X2 interface, which can also be referred to as an Xn interface).
  • the second communication unit 802 is configured to control communication between the second access network device and the terminal, and may include a second receiving unit 8021 and a second sending unit 8022 for controlling receiving and transmitting, respectively; the second communication unit 802 may The message is received and transmitted through an interface (eg, an air interface) between the second access network device and the terminal.
  • the interface here is a logical concept. In the implementation, the corresponding logical unit needs to be set to meet the protocol requirements of the corresponding interface.
  • the physical connection between the nodes may be a wireless connection or a wired connection. For example, a wireless connection may be adopted between the access network device and the terminal, and a wired connection may be adopted between any two access network devices.
  • the message or information received by the second access network device from the other access network device may be controlled and received by the first receiving unit 8011; the second access network device Messages or information transmitted to other access network devices (e.g., the first access network device) may be controlled to be transmitted by the first transmitting unit 8012.
  • the message or information received by the second access network device from the terminal can be controlled and received by the second receiving unit 8021; the message or information sent by the second access network device to the terminal can be controlled and sent by the second sending unit 8022.
  • the foregoing first receiving unit 8011 is a unit for controlling receiving, and can receive information sent by other access network devices by using a connection medium between the access network devices, such as an optical fiber.
  • the first sending unit 8012 is a unit for controlling transmission, and can send information to other access network devices by using a connection medium between the access network devices, such as an optical fiber.
  • the above second receiving unit 8021 is a unit for controlling reception, and the information transmitted by the terminal can be received by a receiving device of the second access network device, such as an antenna and a radio frequency device.
  • the above second sending unit 8022 is a unit for controlling transmission, and can transmit information to the terminal through a transmitting device of the second access network device, such as an antenna and a radio frequency device.
  • the second receiving unit 8012 is configured to receive, by using the second terminal, identifier information of the first access network device from the first terminal, where the first terminal accesses the first access network device, where the first The terminal is connected to the second terminal;
  • the first sending unit 8021 is configured to send a request message to the first access network device, requesting to establish a communication link between the second access network device and the first terminal, where the communication link is used for transmitting Data between the first access network device and the first terminal.
  • each unit of any one of the foregoing apparatus 500, the apparatus 600, the apparatus 700, and the apparatus 800 is only a division of a logical function, and may be integrated into one physical entity in whole or in part, or may be integrated in actual implementation. Physically separated. Moreover, these units may all be implemented in the form of software by means of processing component calls; or may be implemented entirely in hardware; some units may be implemented in software in the form of processing component calls, and some units may be implemented in hardware.
  • the first communication unit 501, the second communication unit 502, or the connection unit 503 in the device 500 may be a separately set processing element, or may be implemented in one chip of the terminal, or may be in the form of a program.
  • the first communication unit 601, the second communication unit 602, or the determining unit 603 in the device 600 may be a separately set processing element, or may be integrated into one chip of the access network device, or may be implemented. It is stored in the memory of the access network device in the form of a program, and is called by a processing element of the access network device and performs the function of the unit.
  • the implementation of other units is similar. In addition, all or part of these units can be integrated or implemented independently.
  • the processing elements described herein can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above units may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software.
  • the above device 500, the device 600, the device 700, and the unit in the device 800 may be one or more integrated circuits configured to implement the above method, for example, one or more Application Specific Integrated Circuits (ASICs). Or, one or more digital signal processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).
  • ASICs Application Specific Integrated Circuits
  • DSPs digital signal processors
  • FPGAs Field Programmable Gate Arrays
  • the processing element can be a general purpose processor, such as a central processing unit (CPU) or other processor that can invoke the program.
  • these units can be integrated and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • FIG. 9 is a schematic structural diagram of an access network device 900 according to an embodiment of the present application.
  • the access network device 900 can be the first access network device or the second access network device in the foregoing embodiment, and is used to implement the operations of the first access network device or the second access network device in the foregoing embodiment.
  • the access network device includes an antenna 910, a radio frequency device 920, and a baseband device 930.
  • the antenna 910 is connected to the radio frequency device 920.
  • the radio frequency device 920 receives the information transmitted by the terminal through the antenna 910, and transmits the information sent by the terminal to the baseband device 930 for processing.
  • the baseband device 930 processes the information of the terminal and sends the information to the radio frequency device 920.
  • the radio frequency device 920 processes the information of the terminal and sends the information to the terminal through the antenna 910.
  • the communication medium may be a wired medium, such as an optical fiber, or a wireless medium.
  • the above means for the first access network device or the second access network device may be located in the baseband device 930.
  • the various units shown in FIG. 6 or FIG. 8 are implemented in the form of a processing component scheduler, for example
  • the baseband device 930 includes a processing element 931 and a storage element 932 that invokes a program stored by the storage element 932 to perform the method performed by the first access network device or the second access network device in the above method embodiments.
  • the baseband device 90 may further include an interface 933 for interacting with the radio frequency device 920, such as a common public radio interface (CPRI).
  • CPRI common public radio interface
  • the various units shown in FIG. 6 or FIG. 8 may be one or more processing elements configured to implement the methods performed by the first access network device or the second access network device above.
  • the components are disposed on baseband device 930, where the processing components can be integrated circuits, such as one or more ASICs, or one or more DSPs, or one or more FPGAs, and the like. These integrated circuits can be integrated to form a chip.
  • the various units shown in FIG. 6 or FIG. 8 may be integrated together and implemented in the form of a SOC, for example, the baseband device 930 includes a SOC chip for implementing the above method.
  • the processing element 931 and the storage element 932 may be integrated in the chip, and the method executed by the first access network device or the second access network device or the method or FIG. 6 or the figure is implemented by the processing element 931 calling the stored program of the storage element 932.
  • the functions of the respective units shown in FIG. 8; or, at least one integrated circuit may be integrated in the chip for implementing the method performed by the first access network device or the second access network device or the units shown in FIG. 6 or FIG.
  • the function of the unit can be realized by the processing of the component calling program, and the function of the part unit is realized by the form of the integrated circuit.
  • the above configuration means for the first access network device or the second access network device comprises at least one processing element and storage element, wherein at least one processing element is used to perform the method embodiments provided above The method performed by the first access network device or the second access network device.
  • the processing element may perform some or all of the steps performed by the SN or MN in the above method embodiment in a manner of executing the program stored in the storage element in the first manner; or in a second manner: by using hardware in the processor element
  • the integrated logic circuit performs some or all of the steps performed by the first access network device or the second access network device in the foregoing method embodiment, and may also perform the above manner in combination with the first mode and the second mode.
  • the processing elements herein, as described above, may be a general purpose processor, such as a CPU, or may be one or more integrated circuits configured to implement the above methods, such as one or more ASICs, or one or more DSPs. Or, one or more FPGAs, etc.
  • the storage element can be a memory or a collective name for a plurality of storage elements.
  • FIG. 10 is a schematic structural diagram of a terminal 1000 according to an embodiment of the present application. It can be the first terminal or the second terminal in the foregoing embodiment, and is used to implement the operations of the first terminal or the second terminal in the foregoing embodiment.
  • the terminal 1000 includes a processing component 1010, a storage component 1020, and a transceiver component 1030.
  • the transceiver component 1030 can be coupled to an antenna.
  • the transceiver component 1030 receives information transmitted by an access network device such as a base station through an antenna, and transmits the information to the processing component 1010 for processing.
  • processing component 1010 processes the data of the terminal and transmits it to the access network device via transceiver component 1030.
  • the storage element 1020 is for storing a program implementing the above method embodiment, and the processing element 1010 calls the program to perform the operations of the above method embodiments.
  • each of the above units in FIG. 7 or FIG. 9 may be one or more processing elements configured to implement the method performed by the above terminal, the processing elements being disposed on a circuit board of the terminal, where the processing elements are It can be an integrated circuit, such as one or more ASICs, or one or more DSPs, or one or more FPGAs, and the like. These integrated circuits can be integrated to form a chip.
  • the various units in FIG. 7 or FIG. 9 above may be integrated together and implemented in the form of a SOC, for example, the terminal includes the SOC chip for implementing the above method.
  • the processing element 1010 and the storage element 1020 may be integrated in the chip, and the functions of the above methods or the above units in FIG. 7 or FIG. 9 may be implemented by the processing element 1010 in the form of a stored program calling the storage element 1020; or, the chip may be integrated
  • the form of the circuit is implemented.
  • the above configuration apparatus includes at least one processing element and storage element, wherein at least one processing element is used to perform the method provided by the above method embodiments.
  • the processing element may perform some or all of the steps in the above method embodiments in a manner of executing the program stored in the storage element in the first manner; or in a second manner: by combining the integrated logic circuits of the hardware in the processing element.
  • the method of the above method performs some or all of the steps in the foregoing method embodiments; of course, the method provided by the foregoing method embodiments may also be implemented in combination with the first mode and the second mode.
  • the processing elements herein, as described above, may be general purpose processing elements, such as a CPU, or may be one or more integrated circuits configured to implement the above methods, such as one or more ASICs, or one or more DSPs. Or, one or more FPGAs, etc.
  • the storage element can be a memory or a collective name for a plurality of storage elements.
  • FIG. 11 is a schematic diagram of a communication system 1100 according to an embodiment of the present application.
  • the communication system 1100 includes:
  • the first access network device 1101, the first access network device 1101 can perform operations performed by the first access network device in any of the embodiments of FIG. 2 to FIG. For example, it may be an access network device of the embodiment shown in FIG. 6 or 9.
  • the second access network device 1102, the second access network device 1102 can perform operations performed by the second access network device in any of the embodiments of FIG. 2 to FIG.
  • it may be an access network device as shown in the embodiment of FIG. 8 or FIG.
  • the communication system may further include a terminal 1103 and a terminal 1104.
  • the terminal 1103 may perform the operations performed by the first terminal in any of the embodiments of FIG. 2 or FIG. 4, and may be the terminal described in the embodiment of FIG. 5 or FIG. 10;
  • the terminal 1104 may perform the operations performed by the second terminal in any of the embodiments of FIG. 2 to FIG. 4, and may be the terminal described in the embodiment of FIG. 7 or FIG. 10, and details are not described herein.
  • the communication system can also be a communication system as shown in FIG.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

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Abstract

本申请提供了一种数据传输方法、接入网设备及终端，该方法包括：第一终端从第一接入网设备接收第一指示信息，其中，所述第一终端接入所述第一接入网设备，所述第一指示信息用于触发所述第一终端连接第二终端；所述第一终端根据所述第一指示信息连接第二终端；所述第一终端通过所述第二终端与第二接入网设备进行数据传输，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据，则第一接入网设备与第二接入网设备能够同时为第一终端提供数据传输服务，提升了第一终端的通信质量。

Description

数据传输方法、接入网设备及终端
本申请要求于2017年5月17日提交中国专利局、申请号为201710349042.X、发明名称为“数据传输方法、接入网设备及终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信领域，特别是一种数据传输方法、接入网设备及终端。
背景技术
终端与基站的通信过程中，若终端处于基站信号覆盖比较差的区域，基站与终端的空口质量变差，为了保证小区的吞吐率，该基站作为主基站可以为终端增加该终端与辅基站的数据链路，将部分或全部终端的数据转移到辅基站进行传输，即为该终端实施双连接(dual-connectivity，DC)。
现有技术中，辅基站由主基站根据终端对至少一个基站的测量信息决定，但在基站信号覆盖不佳，例如终端与基站距离过远的场景中，终端不能向主基站反馈测量信息，或者即使终端测量到基站，但基站干扰较大的情况下，没有合适的辅基站为终端执行数据分流。
发明内容
本申请实施例提供了一种数据传输方法、接入网设备及终端。
第一方面，本申请实施例提供了一种数据传输方法，包括：第一终端从第一接入网设备接收第一指示信息，其中，所述第一终端接入所述第一接入网设备，所述第一指示信息用于触发所述第一终端连接第二终端；所述第一终端根据所述第一指示信息连接所述第二终端；所述第一终端通过所述第二终端与第二接入网设备进行数据传输，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
其中，第一接入网设备作为主节点，第二接入网设备作为辅节点，共同为第一终端提供数据传输服务。
采用本申请实施例提供的数据传输方法，第一终端连接第二终端，且第一终端通过所述第二终端与第二接入网设备进行数据传输，从而，第二接入网设备可以作为辅节点，分流第一终端与第一接入网设备间的数据，提升第一终端的通信质量。
在第一方面的一种可能的实现方式中,所述方法还包括：所述第一终端从所述第一接入网设备接收所述第一接入网设备的标识信息；所述第一终端向所述第二终端发送所述标识信息，以使得所述第二终端向第二接入网设备发送所述标识信息，其中，所述 标识信息用于所述第二接入网设备向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。在该实施方式中，第二接入网设备主动向第一接入网设备请求作为辅节点，第一接入网设备进而与其建立双连接链路，无需第一接入网设备根据第一终端的测量信息来选择辅节点。
在第一方面的一种可能的实现方式中,所述方法还包括：所述第一终端从所述第一接入网设备接收所述第一接入网设备的第一标识信息以及所述第一接入网设备的邻接入网设备的第二标识信息；所述第一终端向所述第二终端发送所述第一标识信息和第二标识信息，以使得所述第二终端向所述邻接入网设备发送第二指示信息，其中，所述第二指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述邻接入网设备与所述第一终端间的通信链路。在该实施方式中，辅节点(第二接入网设备)为第一接入网设备的相邻接入网设备，避免因为第一接入网设备与第二接入网设备之间没有通信接口而无法成功建立双连接链路，进而，提升了辅节点的数据分流效果。
在第一方面的一种可能的实现方式中,所述方法还包括：所述第一终端从所述第二终端接收至少一个接入网设备的标识信息，所述至少一个接入网设备中包括所述第二接入网设备；所述第一终端向所述第一接入网设备发送所述至少一个接入网设备的标识信息，以使得所述第一接入网设备请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
可选地，第二终端确定向第一终端发送的至少一个接入网设备的标识信息。所述至少一个接入网设备中可以包括第二终端当前的服务小区所属的接入网设备，也可以包括第二终端测量到的接入网设备。
在第一方面的一种可能的实现方式中,所述方法还包括：所述第一终端从所述第一接入网设备接收所述第一接入网设备的邻接入网设备的标识信息；所述第一终端向所述第二终端发送所述邻接入网设备的标识信息，以使得所述第二终端从所述邻接入网设备中确定所述第二接入网设备；所述第一终端从所述第二终端接收所述第二接入网设备的标识信息；所述第一终端向所述第一接入网设备发送所述第二接入网设备的标识信息，以使得所述第一接入网设备请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。在该实施方式中，辅节点(第二接入网设备)为第一接入网设备的相邻接入网设备，避免因为第一接入网设备与第二接入网设备之间没有通信接口而无法成功建立双连接链路，进而，提升了辅节点的数据分流效果。
第二方面，本申请实施例提供了一种数据传输方法，包括：第一接入网设备向第一终端发送第一指示信息，其中，所述第一终端接入所述第一接入网设备，所述第一指示信息用于触发所述第一终端连接第二终端，以使得所述第一终端通过所述第二终端与第二接入网设备进行数据传输，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
在第二方面的一种可能的实现方式中，所述方法还包括：所述第一接入网设备向所述第一终端发送所述第一接入网设备的标识信息，以使得所述第二接入网设备通过所述第二终端从所述第一终端接收所述标识信息，其中，所述标识信息用于所述第二接 入网设备向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
在第二方面的一种可能的实现方式中，所述方法还包括：所述第一接入网设备向所述第一终端发送所述第一接入网设备的第一标识信息以及所述第一接入网设备的邻接入网设备的第二标识信息，以使得所述邻接入网设备通过所述第二终端从所述第一终端接收所述第二指示信息，其中，所述第二指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述邻接入网设备与所述第一终端间的通信链路。
在第二方面的一种可能的实现方式中，所述方法还包括：所述第一接入网设备从所述第一终端接收至少一个接入网设备的标识信息，所述至少一个接入网设备中包括所述第二接入网设备；所述第一接入网设备从所述至少一个接入网设备中确定所述第二接入网设备；所述第一接入网设备请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
在第二方面的一种可能的实现方式中，所述方法还包括：所述第一接入网设备向所述第一终端发送所述第一接入网设备的邻接入网设备的标识信息；以使得所述第二终端从所述第一终端接收所述邻接入网设备的标识信息并从所述邻接入网设备中确定所述第二接入网设备；所述第一接入网设备通过所述第一终端从所述第二终端接收所述第二接入网设备的标识信息；所述第一接入网设备求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
第三方面，本申请实施例提供了一种数据传输方法，包括：第二终端连接第一终端，其中，所述第一终端接入第一接入网设备；所述第二终端确定第二接入网设备，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
在第三方面的一种可能的实现方式中，所述方法还包括：所述第二终端从所述第一终端接收所述第一接入网设备的标识信息；所述第二终端向所述第二接入网设备发送所述标识信息，其中，所述标识信息用于所述第二接入网设备向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
在第三方面的一种可能的实现方式中，所述方法还包括：所述第二终端从所述第一终端接收所述第一接入网设备的第一标识信息以及所述第一接入网设备的邻接入网设备的第二标识信息；所述第二终端向所述邻接入网设备发送指示信息，所述指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述邻接入网设备与所述第一终端间的通信链路。
在第三方面的一种可能的实现方式中，所述方法还包括：所述第二终端向所述第一终端发送至少一个接入网设备的标识信息，所述至少一个接入网设备中包括所述第二接入网设备，以使得所述第一接入网设备从所述第一终端接收所述至少一个接入网设备的标识信息并请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
在第三方面的一种可能的实现方式中，所述方法还包括：所述第二终端从所述第一终端接收所述第一接入网设备的邻接入网设备的标识信息；所述第二终端确定第二 接入网设备包括：所述第二终端从所述邻接入网设备中确定所述第二接入网设备；所述第二终端向所述第一终端发送所述第二接入网设备的标识信息，以使得所述第一接入网设备从所述第一终端接收所述第二接入网设备的标识信息并请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
第四方面，本申请实施例提供了一种数据传输方法，包括：第二接入网设备通过第二终端从第一终端接收第一接入网设备的标识信息，其中，所述第一终端接入所述第一接入网设备，所述第一终端连接所述第二终端；所述第二接入网设备向所述第一接入网设备请求建立所述第二接入网设备与第一终端间的通信链路，所述通信链路用于传输所述第一接入网设备与所述第一终端间的数据。
在上述任一方面提供的数据传输方法中，所述第一终端可以是无人机终端；且所述第二终端可以是地面终端，第一终端与第二终端间建立设备到设备(device to device，D2D)链路。相应地，在上述任一方面提供的数据传输方法中，所述第一接入网设备可以是具有与无人机终端通信能力的基站，例如，可以是无人机专用基站；且所述第二接入网设备可以是任意类型的基站。
第五方面，本申请实施例提供了一种装置，该装置具有实现以上任一一种数据传输方法中第一接入网设备或者具有实现以上任一一种数据传输方法中第二接入网设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或手段(means)。
第六方面，本申请实施例提供了一种接入网设备，包括处理器和收发器，所述处理器被配置为支持接入网设备执行上述数据传输方法中第一接入网设备或者第二接入网设备相应的功能。所述收发器用于支持接入网设备与终端之间的通信，向终端发送上述数据传输方法中所涉及的信息或者指令。接入网设备中还可以包括存储器，所述存储器用于与处理器耦合，其保存接入网设备必要的程序指令和数据。接入网设备中还可以包括通信接口，所述通信接口用于与其他网络设备通信。
在一个可能的实现方式中，该接入网设备为基站。
第七方面，本申请实施例提供了一种装置，该装置具有实现以上任一一种数据传输方法中第一终端或者具有实现以上任一一种数据传输方法中第二终端行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或手段(means)。
第八方面，本申请实施例提供了一种终端。该终端的结构中包括处理器和收发器，所述处理器被配置为支持终端执行上述数据传输方法中第一终端或者第二终端相应的功能。所述收发器用于支持接入网设备与终端之间的通信，向接入网设备发送上述数据传输方法中所涉及的信息或者指令。终端中还可以包括存储器，所述存储器用于与处理器耦合，其保存终端必要的程序指令和数据。
第九方面，本发明实施例提供了一种通信系统，包括以上方面所述的第一接入网设备以及第二接入网设备。所述通信系统中还可以包含以上方面所述的终端。
第十方面，本申请实施例提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述任一方面所述的数据传输方法。
第十一方面，本申请实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述任一方面所述的数据传输方法。
第十二方面，本申请实施例提供了一种芯片，该芯片可以执行上述任一方面所述的数据传输方法。
采用本申请实施例提供的技术方案，第一终端连接第二终端，并通过所述第二终端与第二接入网设备进行数据传输，从而，第一终端分别连接第一接入网设备及第二接入网设备，其中，第一接入网设备作为主节点，第二接入网设备可以作为辅节点用于分流第一终端与第一接入网设备间的数据，从而，提升了第一终端的通信质量。当第一终端为处于飞行状态无人机终端时，无人机终端通过与地面终端建立D2D链路，进而与地面基站进行双连接通信，满足其数据通信需求。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的一种通信系统的示意图；
图2是本申请实施例提供的一种数据传输方法的流程示意图；
图3-1是本申请实施例提供的一种数据传输方法的流程示意图；
图3-2是本申请实施例提供的一种数据传输方法的流程示意图；
图4是本申请实施例提供的一种数据传输方法的流程示意图；
图5是本申请实施例提供的一种装置500的结构示意图；
图6是本申请实施例提供的一种装置600的结构示意图；
图7是本申请实施例提供的一种装置700的结构示意图；
图8是本申请实施例提供的一种装置800的结构示意图；
图9是本申请实施例提供的一种接入网设备900的结构示意图；
图10是本申请实施例提供的一种终端1000的结构示意图；
图11是本申请实施例提供的一种通信系统1100的示意图。
具体实施方式
本申请实施例中描述的技术可用于多种通信系统，例如LTE系统等4G(the fourth generation，第四代)系统，新无线接入网(New RAN，NR)以及演进的LTE(evolved LTE，eLTE)系统等5G(the fifth generation，第五代)系统，或者其他下一代通信系统。
本申请实施例中所述的接入网设备包括NR中的接入网侧设备，例如gNB、传输点(trasmission point，TRP)，或者由集中单元(central unit，CU)与分布式单元(distributed unit，DU)组成的基站设备，其中，CU也可以称为控制单元(control unit)。当长期演进(long term evolution，LTE)系统中的基站设备，即演进型节点B(evolved nodeB，eNB)连接5G核心网(5G-Core，5G CN)时，LTE eNB也可以称为eLTE eNB。具体地，eLTE eNB是在LTE eNB基础上演进的LTE基站设备，可以直接连接5G CN。eLTE eNB也属于NR中的基站设备。所述接入网设备也可以是LTE系统中的设备演进型节点B(evolved NodeB，eNB)。所述接入网设备还可以是接入点(access point，AP)，或者其他具有与终端及核心网通信能力的网络设备，本申请实施例对接入网设备的类型不做限定。
本申请实施例所涉及到的终端可以包括具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备、航空航天设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备(user equipment，UE)，移动台(mobile station，MS)，终端设备(terminal equipment)等。其中，航空航天设备可以是无人机或者其他具备通信模块的飞行设备。无人机也可以称为无人机用户设备(drone UE)，或者无人驾驶飞机(Unmanned Aerial Vehicle，UAV)。
本申请实施例定义接入网到终端的单向通信链路为下行链路，在下行链路上传输的数据为下行数据，下行数据的传输方向称为下行方向；而终端到接入网的单向通信链路为上行链路，在上行链路上传输的数据为上行数据，上行数据的传输方向称为上行方向。
本申请实施例中所述的资源为传输资源，包括时域资源以及频域资源，可以用于在上行通信过程或者下行通信过程中承载数据或信令。
本申请实施例中所述的D2D是一种可以实现近距离的终端间直接通信的技术。利用D2D，终端可以通过另一个终端接入无线网络并保持与无线网络的连接。具体地，可以采用蓝牙、WIFI等技术在两个终端间建立D2D链路。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，表示前后关联对象是一种“或”的关系。
应理解，在本发明实施例中，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
本申请实施例中出现的“多个”是指两个或两个以上。
本申请实施例中出现的第一、第二等描述，仅作示意与区分描述对象之用，没 有次序之分，也不表示本申请实施例中对设备个数的特别限定，不能构成对本申请实施例的任何限制。
本申请实施例中出现的“连接”是指直接连接或者间接连接等各种连接方式，以实现设备间的通信，本申请实施例对此不做任何限定。
本申请实施例中出现的“网络”与“系统”表达的是同一概念，通信系统即为通信网络。
图1是本申请实施例提供的一种通信系统的示意图。
如图1所示的通信网络中，包括第一接入网设备110和第二接入网设备120，第一接入网设备110管理的小区称为第一小区，第二接入网设备120管理的小区称为第二小区。第一小区与第二小区可以如图1中所示有重叠的区域，或者图1中未示出，第二小区可以处于第一小区的范围内。第一终端130接入第一接入网设备110，第二终端140接入第二接入网设备120。
第一终端与第二终端进行D2D通信，具体地，第二终端140作为第一终端130的中继(relay)终端，将第一终端130接入第二接入网设备120。第一终端130与第二终端140之间有通信接口，例如图1中所示的PC5接口。第二终端140与第二接入网设备120之间有通信接口，例如图1中所示的Uu接口。第一接入网设备110与第二接入网设备120之间也可以有通信接口，例如图1中所示的Xn接口(也可以称为X2接口)。
第一终端130在第一接入网设备110建立控制面(control plane，CP)，并与第一接入网设备110进行用户面(user plane，UP)数据传输。由于第一终端130的位置会随着移动发生变化，如果第一终端从第一接入网设备110的近端移动到远端，如图1所示，第一终端从第一小区向第二小区移动，则第一终端130逐渐远离第一接入网设备110的信号覆盖范围，第一终端130与第一接入网设备110之间的空口质量会变差。为了保证小区的吞吐率，第一终端130可以在维持与第一接入网设备110的通信的前提下，通过第二终端140接入第二接入网设备120，使得第一终端130与第一接入网设备110及第二接入网设备120实现双连接，其中，第一接入网设备110作为主节点(master node，MN)，且第二接入网设备120作为辅节点(secondary node，SN)，将第一终端130的部分或全部数据从第一接入网设备转移到第二接入网设备进行传输。可以理解，当第一接入网设备110与第二接入网设备120均为基站设备时，主节点可以称为主基站，辅节点可以称为辅基站。
具体地，双连接有不同的实现方式，或者说针对终端数据有不同的分流方式。例如，辅节点可以分别与终端、核心网只建立用户面连接，则在下行方向，可以在主节点的分组数据汇聚层协议(Packet Data Convergence Protocol，PDCP)层将核心网下发的下行数据分流到辅节点，并由辅节点将下行数据发送给终端；在上行方向，辅节点从终端接收上行数据，辅节点再将接收到的上行数据发送给主节点，由主节点将上行数据汇聚后发送给核心网，此种双连接方式可以称为分裂承载(split bearer)(或称为3C类型)。或者，辅节点与核心网建立有用户面连接及数据面连接，且辅节点与终端只建立数据面连接，则在下行方向，辅节点可以直接从核心网接收下行数据并发送给终端；在 上行方向，辅节点可以直接将从终端接收的上行数据发送到核心网，此种双连接方式可以称辅小区组承载(secondary cell group bearer，SCG bearer)(或称为1A类型)。可以理解，在任意一种双连接方式中，主节点与核心网有控制面和用户面连接，且主节点与终端有控制面和用户面连接。简而言之，3C类型是指终端数据在主基站分流，1A类型是指终端数据在核心网分流。
其中，辅节点可以用于传输终端的部分或全部业务相关的数据，例如，部分业务的数据通过主节点传输且其余业务的数据通过辅节点传输，本申请实施例对此不做限定。
可以理解，一个终端可以同时接入主节点和多个辅节点，每个辅节点可以分别传输该终端的部分用户面数据，双连接也可以称为多连接(multi-connectivity)。
在一个无人机终端通信场景中，第一终端是处于飞行状态的无人机终端，第二终端是地面终端，第一接入网设备是具备与无人机终端通信的能力的基站，例如管理无人机终端的专用基站或者普通基站，第二接入网设备是任意类型的基站，例如普通基站。所述专用基站具备近端范围内针对无人机终端的完整通信能力，以及远端范围内针对无人机终端的低速率数据及信令的通信能力，其中，近端范围与远端范围可以通过相应空间内的信号质量是否能够使得UE的通信质量达到一定阈值来划分，例如，地域半径20公里的空间以及空余半径3公里的空间可以认为是远端范围。此外，所述专用基站可以兼具普通地面基站的功能。所述普通基站具有普通地面基站的功能，以及近端范围内针对无人机终端的完整通信能力，所述普通基站还可以作为高空无人机终端的数据面中继节点。
如果无人机终端的飞行高度较高，则无人机终端无法对位于地面的基站进行直接测量，或者，当基站的站间距可能较远，无人机终端也无法测量到合适的基站，则无人机终端不能向主基站反馈测量信息，导致专用站无法为无人机终端选取合适的辅基站。又或者,如果无人机终端处于多个基站的强干扰区域，即使无人机终端能够测量到基站，但由于干扰较大，因此，该测量到的基站不能直接作为辅基站对无人机终端的数据进行分流。
图2是本申请实施例提供的一种数据传输方法到的流程示意图。该方法可以适用于图1所示的通信系统中。
该方法包括如下步骤：
S201：第一接入网设备向第一终端发送第一指示信息，其中，所述第一终端接入所述第一接入网设备，所述第一指示信息用于触发所述第一终端连接第二终端。
其中，第一终端接入第一接入网设备包括：第一终端与第一接入网设备建立了通信连接，且第一终端可以与第一接入网设备进行数据传输。
所述第一指示信息用于触发所述第一终端连接第二终端包括：所述第一指示信息可以用于指示第一终端进行发现(discovery)过程，第一终端通过发现过程将第二终端确定为中继终端。
可选地，第一接入网设备还可以向第一终端发送双连接数据传输请求。具体地，第一接入网设备根据当前的负载状况、带宽、小区吞吐率等条件决定是否要为第一终端进行双连接，并向第一终端发送双连接数据传输的请求，以使得第一终端通过第二终端向第二基站发送该请求，则第二基站根据该请求，可以与第一基站进行双连接建立过程。
可选地，第一接入网设备可以通过任意一种接入网设备向终端发送的消息来向第一终端发送所述第一指示信息，例如在无线资源控制(radio resource control，RRC)连接重配置消息中包含所述第一指示信息，也可以为该第一指示信息设置一条专用消息，本申请实施例对此不做限定。
S202：第一终端根据所述第一指示信息连接第二终端。
具体地，可以采用现有技术中的任意一种实施方式进行发现过程，从而使得第一终端连接第二终端，本申请实施例对此不做限定。例如，可以由第一终端直接发起发现过程，即采用模式B(modeB)的发现方式，由第一终端向测量范围内的至少一个终端，即候选的中继终端发送请求消息。若有终端接受第一终端的请求，则该终端向第一终端发送响应消息，从而完成发现过程。当发现过程执行完毕后，第一终端可以与第二终端建立通信链路。
可选地，如果发现失败，即第一终端没有找到合适的中继终端，则第一终端可以在发现失败后通知第一接入网设备。例如，第一终端可以通过RRC完成消息通知第一基站发现失败，或者也采用其他新增的专用消息或现有消息通知第一基站，本申请实施例对此不做限定。
S203：第一终端通过所述第二终端与第二接入网设备进行数据传输，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
具体地，第二接入网设备可以作为辅节点，分流第一接入网设备与第一终端间的数据。例如，第一终端可以通过第二终端向第二接入网设备发送上行数据，由第二接入网设备传输到核心网，或者由第二接入网设备将上行数据发送给第一接入网设备，再由第一接入网设备传输给核心网；第一接入网设备也可以将核心网下发的下行数据中的部分或者全部数据分流到第二接入网设备，或者第二接入网设备直接从核心网接收下行数据，再由第二接入网设备将下行数据通过第二终端发送给第一终端。可以理解，第二接入网设备可以有一个或者多个，作为主节点的第一接入网设备可以连接一个或多个辅节点。
可选地，在本申请的一个实施方式中，所述方法还包括：第一接入网设备向第一终端发送第一接入网设备的标识信息。则，第一终端可以向第二终端发送所述第一接入网设备的标识信息，从而第二终端可以将第一接入网设备的标识信息发送给第二接入网设备，由第二接入网设备向第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
其中，所述通信链路也可以称为数据通信链路，所述通信链路中包括第一终端、第二终端以及第二接入网设备三个节点，第二接入网设备可以通过所述通信链路与第一终端进行数据传输。其中，第一终端与第二终端间的链路为D2D链路。
可选地，所述第一接入网设备的标识信息可以和第一指示信息都包含在同一条或者不同的由第一接入网设备发送给第一终端的消息中，本申请实施例对此不做限定。
可选地，第一终端通过发现消息把第一接入网设备的标识信息发送给第二终端，并由第二终端发送给其所属第二接入网设备。其中，所述发现消息是发现过程中的第一终端与第二终端交互的消息的统称，例如，第一终端可以在发送给第二终端的solicitation(请求)消息中携带该第一接入网设备的标识信息。
其中，所述第一接入网设备的标识信息可以是小区标识如物理小区标识(physical cell identity，PCI)，或其它能够让第二接入网设备识别的接入网设备的标识信息，本申请实施例对此不做限定。
可选地，在本申请的一个实施方式中，所述方法还包括：所述第一终端从所述第一接入网设备接收所述第一接入网设备的标识信息以及所述第一接入网设备的邻接入网设备的标识信息。则，所述第一终端可以向所述第二终端发送所述第一接入网设备的标识信息和所述邻接入网设备的标识信息。进而，所述第二终端可以向对应的邻接入网设备发送第二指示信息，其中，所述第二指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述邻接入网设备与所述第一终端间的通信链路。
具体地，第一接入网设备可以确定至少一个候选辅节点，所述候选辅节点可以是与第一接入网设备有通信接口的接入网设备。第一接入网设备向第一终端发送辅节点信息，所述辅节点信息可以是一组接入网设备的标识信息。例如，所述候选的辅节点是第一接入网设备的邻接入网设备。第一接入网设备通过邻区关系得到邻区列表，并将邻区列表对应的接入网设备的标识信息发送给第一终端。
进而，第一终端向第二终端发送的发现消息中不仅包含第一接入网设备的标识信息，还包含所述邻接入网设备的标识信息。第二终端收到发现消息后，向每个邻接入网设备发送指示信息，邻接入网设备收到指示信息后，自行决定是否要与第一接入网设备建立双连接链路，若邻接入网设备决定进行双连接，则会向第一接入网设备发送请求消息，请求建立该邻接入网设备与第一终端间的通信链路。若第一接入网设备收到多个邻接入网设备的请求消息，则第一接入网设备可以根据信号质量等条件决定将其中的一个或多个邻接入网设备作为辅节点。其中，第二终端向邻接入网设备发送的指示信息即第二指示信息可以是第一接入网设备的标识信息，即通过第一接入网设备的标识信息触发邻接入网设备判断是否与第一接入网设备进行双连接；或者第二指示信息中可以包含第一接入网设备的标识信息以及显示的指示，该显示的指示触发邻接入网设备判断是否与第一接入网设备进行双连接，本申请实施例对第二指示信息的具体内容不做限定。
可选地，在另一个实施方式中，第二终端从第一接入网设备确定的至少一个候选辅节点中选择一个候选辅节点，并向该辅节点发送第一接入网设备的标识信息。例如，第二终端从第一终端接收到第一接入网设备的至少一个邻接入网设备的标识信息，并在所述至少一个邻接入网设备中选择信号强度最大的一个接入网设备作为候选辅节点，从而向该候选辅节点发送第一接入网设备的标识信息，由该候选辅节点决定是否与第一接入网设备建立双连接链路。
可选地，在本申请的一个实施方式中，所述方法还包括：所述第一终端从所述第二终端接收至少一个接入网设备的标识信息；进而，所述第一终端向所述第一接入网设备发送所述至少一个接入网设备的标识信息，则所述第一接入网设备可以从所述至少一个接入网设备中确定第二接入网设备，请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
其中，所述第一接入网设备请求添加第二接入网设备包括：第一接入网设备向第二接入网设备发送辅节点增加请求消息。
具体地，当第一终端执行发现过程，将第二终端确定为中继终端后，第二终端可以在发送给第一终端的发现消息中携带第二终端确定的至少一个候选辅节点的标识信息。进而，第一终端向第一接入网设备发送所述候选辅节点的标识信息，第一接入网设备从所述候选辅节点中确定第二接入网设备作为辅节点。
可选地，如果第二终端处于空闲态，那么第二终端确定的候选辅节点可以是第二终端能够测量到的接入网设备或者第二终端测量到的接入网设备中信号质量超过一定阈值的一个或多个接入网设备；如果第二终端处于连接态，那么第二终端确定的候选辅节点是第二终端的主服务小区所属的接入网设备。
可选地，在本申请的一个实施方式中，所述方法还包括：所述第一终端从所述第一接入网设备接收所述第一接入网设备的邻接入网设备的标识信息；进而，所述第一终端向所述第二终端发送所述邻接入网设备的标识信息，以使得所述第二终端从所述邻接入网设备中确定所述第二接入网设备；进而，所述第一终端从所述第二终端接收所述第二接入网设备的标识信息并向所述第一接入网设备发送所述第二接入网设备的标识信息，则所述第一接入网设备可以请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
具体地，当第一终端执行发现过程，将第二终端确定为中继终端后，第一终端在发现消息中携带第一接入网设备确定的候选辅节点的指示信息，所述指示信息可以是一组接入网设备的标识信息，例如是第一接入网设备的邻区列表对应的接入网设备的标识信息，对此不做限定。第二终端可以从所述候选辅节点中选择一个候选辅节点。可选地，第二终端可以根据当前的测量信息，或者其他接入网设备相关信息进行选择。例如，第二终端可以判断第二终端当前的主服务小区所属的接入网设备(以下简称为“服务接入网设备”)是否在所述候选辅节点的范围中，如果是，则第二终端将该服务接入网设备确定为辅节点，且第二终端向第一终端发送响应消息，所述响应消息中包含所述服务接入网设备的标识信息。如果第二终端的服务接入网设备不在所述候选辅节点的范围中，则第二终端向第一终端发送无合适的辅节点的指示信息。
采用本申请实施例提供的数据传输方法，第一终端从第一接入网设备接收第一指示信息，其中，所述第一终端接入所述第一接入网设备，所述第一指示信息用于触发所述第一终端连接第二终端；所述第一终端根据所述第一指示信息连接第二终端；所述第一终端通过所述第二终端与第二接入网设备进行数据传输，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据，则第一接入网设备作为主节点，第 二接入网设备作为辅节点，同时为第一终端提供数据传输服务，提升了第一终端的通信质量。
以下图3-1、图3-2及图4所示实施例中，将以无人机通信场景为例，对本申请实施例提供的数据传输方法进行进一步解释与说明。假设第一终端为无人机终端(以下称为“终端1”)，第二终端为地面终端(以下称为“终端2”)，第一接入网设备为无人机专用基站(以下称为“基站1”)，第二接入网设备为普通基站(以下称为“基站2”)，其中，无人机终端已接入无人机专用基站。
可以理解，在本申请实施例中，第一接入网设备也可以是具备与无人机通信能力的普通基站，不限定为无人机专用基站；第二接入网设备也可以是无人机专用基站，不限定为普通基站，以下描述仅为举例说明，不构成对本申请的任何限定。
图3-1是本申请实施例提供的一种数据传输方法的信令流程示意图。
所述方法包括如下步骤：
S301：基站1向终端1发送发现指示信息。
其中，所述发现指示信息用于指示终端1发现可能作为中继终端的地面终端。
S302：基站1向终端1发送基站1的标识信息。
可以理解，S301与S302没有先后执行顺序，可以先执行S301，再执行S302；也可以先执行S302，再执行S301；也可以同时执行S301与S302，例如在同一条消息中携带上述发现指示信息以及基站1的标识信息。本申请实施例对此不做限定。
可选地，基站1还向终端1发送双连接数据传输请求，详细描述可以参照图2所示实施例中的相关内容，不做赘述。
S303：终端1将终端2确定为中继终端。
具体地，终端1接收到发现指示信息后，对终端2执行发现过程，确定终端2适合作为中继终端。关于发现过程的详细描述可以参照图2所示实施例中的相关内容，不做赘述。
S304：终端1向终端2发送基站1的标识信息。
可选地，所述基站1的标识信息包含在终端1发送给终端2的发现消息中，所述发现消息例如是solicitation消息。
S305：终端2向基站2发送基站1的标识信息。
其中，基站2可以是终端2的服务小区所属的基站，也可以是终端2经过测量后确定的适合接入的基站，例如，信号强度最强的基站，本申请对此不做限定。可以理解，终端2的测量范围内可能存在多个基站，则终端2可以分别对每个基站进行测量，选择信号质量最好的基站作为候选辅基站，向该候选辅基站发送基站1的标识信息。
可选地，所述基站1的标识信息可以包含在终端2发送给基站2的RRC消息中，例如RRC连接重配置完成(connection reconfiguration complete)消息，也可以通过其他 消息传输。具体地，如果终端2还没有接入基站2，则终端2与基站2首先需要建立RRC连接，终端2再通过RRC消息向基站2发送所述基站1的标识信息。如果终端2与基站已经建立了RRC连接，则终端2可通过新增的专用消息或者其他现有消息传输所述基站1的标识信息，本申请实施例对此不做限定。
可选地，终端2还可以向基站2发送建立双连接的触发指示。例如，若终端1接收到基站1的双连接数据传输请求，终端1可以将该请求发送给终端2，终端2再将该请求发送给基站2；或者终端2基于该请求生成一个双连接建立指示并发送给基站2，本申请实施例对上述双连接的触发指示的具体形式不做限定。
S306：基站2向基站1请求建立基站2与终端间的通信链路。
具体地，基站2可以通过基站1的标识信息识别基站1，进而向基站1发送请求消息，例如辅基站增加要求(secondary eNB/secondary gNB addition required，SeNB/SgNB addition required)消息，向基站1请求成为辅基站，从而建立基站2与终端间的通信链路。其中，SeNB表示LTE系统中的辅基站，SgNB表示NR中的辅基站，在此作为举例说明。
S307：基站1与基站2进行双连接建立流程。
基站1收到基站2的请求消息后，确定基站2是否适合作为辅基站。若基站1确定基站2可以作为辅基站，则向基站2发起双连接建立流程。该双连接建立流程包括：基站1向基站2发送辅基站建立请求(SeNB/SgNB addition request)消息，请求与基站2建立双连接链路。若基站2接收该双连接建立请求，则基站2向基站1发送辅基站连接确认(SeNB/SgNB addition acknowledge，SeNB addition ACK)消息或辅基站连接响应(SeNB/SgNB addition response)消息。随后，基站2向终端1发送配置信息。基站1与基站2间建立双连接链路。关于双连接建立流程的详细描述可以参照现有技术中的相关内容，在此不做赘述。
上述配置信息可以包括如下任意一种或多种信息：承载信息，包括需要建立的承载的标识信息，如无线接入承载标(EUTRAN radio access bearer identity，eRAB ID)、数据无线承载(data radio bearer，DRB)标识等；隧道端点标识(tunnel endpoint identifier，TEID)；业务质量(quilty of service，QoS)信息，包括QoS分类识别码(QoS class identifier，QCI)、分配保持优先级(allocation and retention priority，ARP)等参数；分流类型指示，例如用于指示分流类型是split bearer或者SCG bearer。对于NR系统，配置信息中还可以包括流标识(flow identity，flow ID)、会话标识(session identity，session ID)等信息。
S308：基站2为终端2分配通信资源。
可选地，终端2向基站2请求通信资源分配，或者基站2主动发起资源分配给终端2。
具体地，如果终端想要与其他终端进行D2D通信，那么该终端要向其接入的基站发送指示信息，通知基站该终端需要执行D2D通信，然后基站会决定使用何种资源分配模式(例如，模式1或者模式2)，通过信令通知终端，如果终端被指示使用模式2 的资源分配方式，那么基站将会通过专用信令给终端分配专用的资源池。如果终端被指示使用模式2的资源分配方式，则终端直接使用已储存的资源池传输数据。
S309：终端1与终端2进行一对一通信(one to one communication)。
具体地，终端2获取基站2分配的通信资源后，就可以与终端1进行D2D通信，或者称为一对一通信，不做赘述。
S3010：终端1通过终端2与基站2进行数据传输。
具体地，由于终端1分别与基站1、基站2建立了通信链路，则基站1作为主基站，基站2作为辅基站，与终端1进行双连接通信。其中，终端1与基站2的数据传输通过终端2进行，例如，终端1发送的上行数据通过终端2传输至基站2，或者终端1的下行数据由基站2发送给终端2，再由终端2传输给终端1，不做赘述。
可选地，如图3-2所示，在本申请的一个实施方式中，S302可以由S302’代替，S302’包括：基站1可以向终端1发送基站1的标识信息以及辅基站范围指示信息。
所述辅基站范围指示信息具体可以是一组基站标识。具体地，如果普通基站和专用基站之间无法建立通信接口，例如，在专用基站和普通基站之间的距离过远的情况下，为了使得双连接能够建立成功，专用基站可以向无人机终端指示辅基站的范围。所述辅基站的范围指示的基站可以是专用基站通过邻区关系得到的邻区关系列表对应的基站，即该专用基站的邻基站。随后，专用基站向无人机终端发送所述辅基站范围指示信息。
相应地，S304可以由S304’代替，S304’包括：终端1向终端2发送基站1的标识信息以及所述辅基站范围指示信息。
则在S305中，终端2向包括基站2在内的辅基站范围指示信息指示的基站发送基站1的标识信息。
具体地，无人机终端执行发现过程，确定作为中继终端的地面终端，向该地面终端发送携带辅基站范围指示信息的发现消息，地面终端收到发现消息后，把专用站的标识信息发送到每一个候选辅基站，由候选辅基站决定是否要进行双连接。若候选辅基站决定要进行双连接，则向专用基站请求建立该候选辅基站与无人机终端间的通信链路，即执行S306，该候选辅基站即为基站2。可以理解，当有多个候选辅基站分别请求专用站建立与无人机终端间的通信链路，主基站可以选择向其中的一个或多个辅基站发起双连接建立流程。
在该实施方式中，辅基站在基站1指示的辅基站范围内，例如是基站1的邻基站，使得基站1与最终确定的辅基站之间可以建立可靠的通信链路，提升辅基站的通信质量。
或者，在另一种实现方式中，终端2可以根据上述辅基站范围指示信息指示的基站的信号强度，选择向信号强度最强的一个基站发送基站1的标识信息，即终端2自行选择最适合作为辅基站的一个基站，并向该基站发送基站1的标识信息。
采用本申请实施例提供的数据传输方法，无人机终端通过地面终端与普通基站进行数据传输，实现无人机终端与专用基站及普通基站的双连接，提升无人机终端的通信质量。
图4是本申请实施例提供的一种数据传输方法的信令流程示意图。
所述方法包括如下步骤：
S401：基站1向终端1发送发现指示信息。
可选地，基站1可以向终端发送包含所述发现指示信息的RRC连接重配置消息。
S402：终端1将终端2确定为中继终端。
关于如何确定中继终端的详细描述可以参照图3实施例中的步骤S303，在此不做赘述。
S403：终端2向终端1发送候选辅基站的标识信息。
具体地，终端2被确定作为终端1的中继终端后，可以向终端1发送终端2确定的一个或多个候选辅基站的标识信息。其中，当终端2处于空闲态，则所述候选辅辅基站包括终端2所能测量到的基站或者终端2测量到的信号质量超过一定阈值的一个或多个基站；当终端2处于连接态，则所述候选辅基站为终端2的服务基站。
可选地，如果终端1采用modeB的发现方式，则终端1向终端2发送包含添加辅基站的请求信息的发现消息，例如，通过solicitaion消息指示终端2搜索候选辅基站，进而，终端2向终端1反馈候选辅基站的标识信息，例如，终端2通过solicitaion消息的响应消息把辅基站的标识信息发送给终端1。或者，终端1向终端2发送的发现消息中没有任何指示消息，终端2在接收到发现消息后，主动把候选辅基站的标识信息发给终端1，即发现消息触发终端2向终端1发送候选辅基站的标识信息。
可选地，如果发现失败，则终端1通知基站1，例如在RRC完成消息中通知基站1，也可以是其他消息，本申请实施例对此不做限定。
S404：终端1向基站1发送所述候选辅基站的标识信息。
可选地，所述候选辅基站的标识信息包含在终端1发送给基站1的RRC连接重配置完成消息中。
S405：基站1从所述候选辅基站中确定辅基站(基站2)。
具体地，如果基站1收到的请求中包含多个候选辅基站的标识，那么需要由基站1决策选择哪一个基站作为辅基站。具体地，基站1可以根据信号质量等条件确定辅基站，不做赘述。
S406：基站1与基站2进行双连接建立流程。
S407：基站2为终端2分配通信资源。
S408：终端1与终端2进行一对一通信。
S409：终端1通过终端2与基站2进行数据传输。
关于S406-S409的详细描述可以参照图3所示实施例中的步骤S307-S3010，在此不做赘述。
可选地，在本申请的一个实施方式中，所述方法还包括：
S400：基站1向终端1发送辅基站范围指示信息。
所述辅基站范围指示信息可以包括基站1的邻基站的标识信息，详细描述可以参照本申请其他实施例的相关内容，不做赘述。
可以理解，S400与S401没有先后执行顺序，可以先执行S400，再执行S401；也可以先执行S401，再执行S400；也可以同时执行S400与S401，例如在同一条消息中携带上述发现指示信息以及辅基站范围指示信息，本申请实施例对此不做限定。
相应地，S402之后，所述方法还包括S402a：终端1向终端2发送所述辅基站范围指示信息。
S402b：终端2根据所述辅基站范围指示信息，确定候选辅基站。
具体地，当终端1发现中继终端，在发现消息中携带所述辅基站范围指示信息，中继终端收到发现消息后，确定候选辅基站。可选地，判断该中继终端当前的服务基站是否为所述辅基站范围指示信息指示的基站。可选地，如果终端2已有服务基站，则终端2判断服务基站是否为辅基站范围指示信息指示的基站，如果是，终端2返回发现响应消息到终端1，该响应消息中包括服务基站的标识信息，即终端2的服务基站可以作为辅基站。可选地，如果终端2当前没有接入任何基站，则终端2根据测量信息，选择基站(例如，选择信号质量最好的小区所属的基站)，判断该选择出的基站是否为辅基站范围指示信息指示的基站，如果是，终端2返回发现响应消息到终端1，该响应消息中包括该选择出的基站的标识信息。如果终端2的服务基站或者终端2选择出的基站不在辅基站范围指示信息指示的基站范围内，终端2通知终端1没有合适的辅基站。
在该实施方式中，辅基站在基站1指示的基站范围内，例如是基站1的邻基站，使得基站1与最终确定的辅基站之间可以建立可靠的通信链路，提升辅基站的通信质量。
采用本申请实施例提供的数据传输方法，无人机终端通过地面终端与普通基站进行数据传输，实现无人机终端与无人机专用站及普通基站的双连接，提升无人机终端的通信质量。
上述图3-1、图3-2、图4所示实施例是基于图2所示实施例，对本申请实施例提供的数据传输方法的解释与说明，本申请提供的各个实施例可以互相参考，为描述之简洁，相同或相似的概念不过多做重复描述。
图5是本申请实施例提供的一种装置500的结构示意图。
该装置500用于终端设备，所述终端设备可以是无人机终端。
如图5所示，该装置500包括：执行以上方法任一方法实施例中第一终端的所执行的各个步骤的单元或手段(means)，且关于这些步骤中的详细描述都可以适用于本 装置实施例。例如，该装置500包括第一通信单元501与第二通信单元502。第一通信单元501可以包括分别用于控制接收和发送的第一接收单元5011和第一发送单元5012。第一通信单元501可以通过接入网的节点(例如，第一接入网设备或者第二接入网设备)与终端之间的接口(例如，空口)接收和发送消息。第二通信单元502可以包括分别用于控制接收和发送的第二接收单元5021和第二发送单元5022。第二通信单元502可以通过终端之间的接口(例如，空口)接收和发送消息。这里的接口是逻辑概念，在实现上需要设置对应的逻辑单元，满足相应接口的协议要求，在节点之间的物理连接上，可以是无线连接。
以上方法实施例中，第一终端从接入网节点接收的消息或信息都可以通过第一接收单元5011控制接收；第一终端向接入网节点发送的消息或信息都可以通过第一发送单元5012控制发送。第一终端从第二终端接收的消息或信息都可以通过第二接收单元5021控制接收；第一终端向第二终端发送的消息或信息都可以通过第二发送单元5022控制发送。
具体地，以上第一接收单元5011或第二接收单元5021是一种控制接收的单元，可以通过终端的接收装置，例如天线和射频装置接收接入网设备或其他终端发送的信息。以上第一发送单元5012或第二发送单元5022是一种控制发送的单元，可以通过终端的发送装置，例如天线和射频装置向接入网设备或其他终端发送信息。
例如，以上装置500还包括连接单元503，用于根据第一指示信息连接所述第二终端，其中，所述第一指示信息用于触发所述第一终端连接第二终端，则第一终端可以通过所述第二终端与第二接入网设备进行数据传输，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
可选地，第二发送单元5022用于向所述第二终端发送所述标识信息，以使得所述第二终端向所述第二接入网设备发送所述标识信息，其中，所述标识信息用于所述第二接入网设备向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
可选地，第一接收单元5011还用于从所述第一接入网设备接收所述第一接入网设备的第一标识信息以及所述第一接入网设备的邻接入网设备的第二标识信息；第二发送单元5022还用于向所述第二终端发送所述第一标识信息以及所述第二标识信息，以使得所述第二终端向所述邻接入网设备发送所述第二指示信息，其中，所述第二指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
可选地，第一接收单元5011还用于从所述第一接入网设备接收所述第一接入网设备的邻接入网设备的标识信息；第二发送单元5022还用于向所述第二终端发送所述邻接入网设备的标识信息，以使得所述第二终端从所述邻接入网设备中确定所述第二接入网设备；以及，第二接收单元5021还用于从所述第二终端接收所述第二接入网设备的标识信息；第一发送单元5012还用于向所述第一接入网设备发送所述第二接入网设备的标识信息，以使得所述第一接入网设备请求添加所述第二接入网设备以传输所述第 一接入网设备与所述第一终端间的数据。
其中，关于连接单元503如何将第一终端连接到第二终端，以及第一终端通过第二终端接入第二接入网设备的详细描述，参见以上方法实施例，在此不再赘述。此外，关于其它发送或接收的消息或信息在此不再详述，具体可以参照以上方法实施例的相关内容。且关于发送或接收的消息或信息的内容或形式也可以参照以上方法实施例的相关内容。
图6是本申请实施例提供的一种装置600的结构示意图。
该装置600用于第一接入网设备，第一接入网设备位于通信系统中，该通信还包括第二接入网设备，第一接入网设备作为主节点，与作为辅节点的第二接入网设备共同为终端提供服务。
如图6所示，该装置600包括执行以上方法任一方法实施例中第一接入网设备的所执行的各个步骤的单元或手段(means)，且关于这些步骤中的详细描述都可以适用于本装置实施例。
该装置600包括第一通信单元601和第二通信单元602。第一通信单元601用于控制接入网设备之间(例如第一接入网设备与第二接入网设备)的通信，可以包括分别用于控制接收和发送的第一接收单元6011和第一发送单元6012；该第一通信单元601可以通过接入网设备之间的接口(例如X2接口，又可以称为Xn接口)接收和发送消息。第二通信单元602用于控制第一接入网设备与终端之间的通信，可以包括分别用于控制接收和发送的第二接收单元6021和第二发送单元6022；该第二通信单元602可以通过第一接入网设备与终端之间的接口(例如，空口)接收和发送消息。这里的接口是逻辑概念，在实现上需要设置对应的逻辑单元，满足相应接口的协议要求，在节点之间的物理连接上，可以是无线连接，也可以是有线连接。例如，接入网设备和终端之间可以采用无线连接的方式，任意两个接入网设备之间可以采用有线连接的方式。
以上方法实施例中，第一接入网设备从其他接入网设备(例如，第二接入网设备)接收的消息或信息都可以通过第一接收单元6011控制接收；第一接入网设备向其他接入网设备(例如，第二接入网设备)发送的消息或信息都可以通过第一发送单元6012控制发送。第一接入网设备从终端接收的消息或信息都可以通过第二接收单元6021控制接收；第一接入网设备向终端发送的消息或信息都可以通过第二发送单元6022控制发送。
具体地，以上第一接收单元6011是一种控制接收的单元，可以通过接入网设备之间的连接介质，例如光纤，接收其他接入网设备发送的信息。以上第一发送单元6012是一种控制发送的单元，可以通过接入网设备之间的连接介质，例如光纤，向其他接入网设备发送信息。以上第二接收单元6021是一种控制接收的单元，可以通过第一接入网设备的接收装置，例如天线和射频装置接收终端发送的信息。以上第二发送单元6022是一种控制发送的单元，可以通过第一接入网设备的发送装置，例如天线和射频装置向终端发送信息。
例如，第二发送单元6022用于向第一终端发送第一指示信息，所述第一指示信 息用于触发所述第一终端连接第二终端，以使得所述第一终端通过所述第二终端与第二接入网设备进行数据传输，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
可选地，第二发送单元6022还用于向所述第一终端发送所述第一接入网设备的标识信息，以使得所述第二接入网设备通过所述第二终端从所述第一终端接收所述标识信息，其中，所述标识信息用于所述第二接入网设备向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
可选地，第二发送单元6022还用于向所述第一终端发送所述第一接入网设备的第一标识信息以及所述第一接入网设备的邻接入网设备的第二标识信息，以使得所述邻接入网设备通过所述第二终端从所述第一终端接收所述第二指示信息，其中，所述第二指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述邻接入网设备与所述第一终端间的通信链路。
又例如，装置600还包括：确定单元603。在该实施方式中，第二接收单元6021用于从所述第一终端接收至少一个接入网设备的标识信息，所述至少一个接入网设备中包括所述第二接入网设备；确定单元603，用于从所述至少一个接入网设备中确定所述第二接入网设备；第一发送单元6012用于向所述第二接入网设备发送请求消息以请求添加所述第二接入网设备传输所述第一接入网设备与所述第一终端间的数据。
关于确定第二接入网设备的方式或过程的描述可以参照以上方法实施例的相关内容，不做赘述。
可选地，第一发送单元6022还用于向所述第一终端发送所述第一接入网设备的邻接入网设备的标识信息；以使得所述第二终端从所述第一终端接收所述邻接入网设备的标识信息并从所述邻接入网设备中确定所述第二接入网设备；以及通过所述第一终端从所述第二终端接收所述第二接入网设备的标识信息；第一发送单元6012，还用于向所述第二接入网设备发送请求消息以请求添加所述第二接入网设备传输所述第一接入网设备与所述第一终端间的数据。
关于其它发送或接收的消息或信息在此不再详述，具体可以参照以上方法实施例的相关内容。且关于发送或接收的消息或信息的内容或形式也可以参照以上方法实施例的相关内容。
图7是本申请实施例提供的一种装置700的结构示意图。
该装置700用于终端设备，所述终端设备可以是地面终端。
如图7所示，该装置700包括：执行以上方法任一方法实施例中第二终端的所执行的各个步骤的单元或手段(means)，且关于这些步骤中的详细描述都可以适用于本装置实施例。例如，该装置700包括第一通信单元701与第二通信单元702。第一通信单元701可以包括分别用于控制接收和发送的第一接收单元7011和第一发送单元7012。第一通信单元701可以通过接入网的节点(例如，第一接入网设备或者第二接入网设备)与终端之间的接口(例如，空口)接收和发送消息。第二通信单元702可以包括分别用 于控制接收和发送的第二接收单元7021和第二发送单元7022。第二通信单元702可以通过终端之间的接口(例如，空口)接收和发送消息。这里的接口是逻辑概念，在实现上需要设置对应的逻辑单元，满足相应接口的协议要求，在节点之间的物理连接上，可以是无线连接。
以上方法实施例中，第二终端从接入网节点接收的消息或信息都可以通过第一接收单元7011控制接收；第二终端向接入网节点发送的消息或信息都可以通过第一发送单元7012控制发送。第二终端从第一终端接收的消息或信息都可以通过第二接收单元7021控制接收；第二终端向第一终端发送的消息或信息都可以通过第二发送单元7022控制发送。
具体地，以上第一接收单元7011或第二接收单元7021是一种控制接收的单元，可以通过终端的接收装置，例如天线和射频装置接收接入网设备或其他终端发送的信息。以上第一发送单元7012或第二发送单元7022是一种控制发送的单元，可以通过终端的发送装置，例如天线和射频装置向接入网设备或其他终端发送信息。
装置700还包括处理单元703，用于确定第二接入网设备，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
可选地，第二接收单元7021，用于从所述第一终端接收所述第一接入网设备的标识信息；第一发送单元7012，用于向所述第二接入网设备发送所述标识信息，其中，所述标识信息用于所述第二接入网设备向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
可选地，第二接收单元7021，用于从所述第一终端接收所述第一接入网设备的第一标识信息以及所述第一接入网设备的邻接入网设备的第二标识信息；第一发送单元7012，用于向所述邻接入网设备发送指示信息，所述指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述邻接入网设备与所述第一终端间的通信链路。
可选地，第二发送单元7022，用于向所述第一终端发送至少一个接入网设备的标识信息，所述至少一个接入网设备中包括所述第二接入网设备，以使得所述第一接入网设备从所述第一终端接收所述至少一个接入网设备的标识信息并请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
可选地，第二接收单元7021，用于从所述第一终端接收所述第一接入网设备的邻接入网设备的标识信息；处理单元703用于从所述邻接入网设备中确定所述第二接入网设备；第二发送单元7022，用于向所述第一终端发送所述第二接入网设备的标识信息，以使得所述第一接入网设备从所述第一终端接收所述第二接入网设备的标识信息并请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
关于其它发送或接收的消息或信息在此不再详述，具体可以参照以上方法实施例。且关于发送或接收的消息或信息的内容或形式也可以参照以上方法实施例。
图8是本申请实施例提供的一种装置800的结构示意图。
该装置800用于第二接入网设备，第二接入网设备位于通信系统中，该通信还包括第一接入网设备，第一接入网设备作为主节点，与作为辅节点的第二接入网设备共同为终端提供服务。
如图8所示，该装置800包括执行以上方法任一方法实施例中第二接入网设备的所执行的各个步骤的单元或手段(means)，且关于这些步骤中的详细描述都可以适用于本装置实施例。
该装置800包括第一通信单元801和第二通信单元802。第一通信单元801用于控制接入网设备之间(例如第一接入网设备与第二接入网设备)的通信，可以包括分别用于控制接收和发送的第一接收单元8011和第一发送单元8012；该第一通信单元801可以通过接入网设备之间的接口(例如X2接口，又可以称为Xn接口)接收和发送消息。第二通信单元802用于控制第二接入网设备与终端之间的通信，可以包括分别用于控制接收和发送的第二接收单元8021和第二发送单元8022；该第二通信单元802可以通过第二接入网设备与终端之间的接口(例如，空口)接收和发送消息。这里的接口是逻辑概念，在实现上需要设置对应的逻辑单元，满足相应接口的协议要求，在节点之间的物理连接上，可以是无线连接，也可以是有线连接。例如，接入网设备和终端之间可以采用无线连接的方式，任意两个接入网设备之间可以采用有线连接的方式。
以上方法实施例中，第二接入网设备从其他接入网设备(例如，第一接入网设备)接收的消息或信息都可以通过第一接收单元8011控制接收；第二接入网设备向其他接入网设备(例如，第一接入网设备)发送的消息或信息都可以通过第一发送单元8012控制发送。第二接入网设备从终端接收的消息或信息都可以通过第二接收单元8021控制接收；第二接入网设备向终端发送的消息或信息都可以通过第二发送单元8022控制发送。
具体地，以上第一接收单元8011是一种控制接收的单元，可以通过接入网设备之间的连接介质，例如光纤，接收其他接入网设备发送的信息。以上第一发送单元8012是一种控制发送的单元，可以通过接入网设备之间的连接介质，例如光纤，向其他接入网设备发送信息。以上第二接收单元8021是一种控制接收的单元，可以通过第二接入网设备的接收装置，例如天线和射频装置接收终端发送的信息。以上第二发送单元8022是一种控制发送的单元，可以通过第二接入网设备的发送装置，例如天线和射频装置向终端发送信息。
例如，第二接收单元8012用于通过第二终端从第一终端接收第一接入网设备的标识信息，其中，所述第一终端接入所述第一接入网设备，所述第一终端连接所述第二终端；
第一发送单元8021，用于向所述第一接入网设备发送请求消息，请求建立所述第二接入网设备与第一终端间的通信链路，所述通信链路用于传输所述第一接入网设备与所述第一终端间的数据。
关于其它发送或接收的消息或信息在此不再详述，具体可以参照以上方法实施例。且关于发送或接收的消息或信息的内容或形式也可以参照以上方法实施例。
应理解，以上装置500、装置600、装置700以及装置800中的任意一个装置的各个单元的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。且这些单元可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分单元以软件通过处理元件调用的形式实现，部分单元以硬件的形式实现。例如，装置500中的第一通信单元501、第二通信单元502、或连接单元503可以为单独设立的处理元件，也可以集成在终端的某一个芯片中实现，此外，也可以以程序的形式存储于终端的存储器中，由终端的某一个处理元件调用并执行该单元的功能。又例如，装置600中的第一通信单元601、第二通信单元602、或确定单元603可以为单独设立的处理元件，也可以集成在接入网设备的某一个芯片中实现，此外，也可以以程序的形式存储于接入网设备的存储器中，由接入网设备的某一个处理元件调用并执行该单元的功能。其它单元的实现与之类似。此外这些单元全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件可以是一种集成电路，具有信号的处理能力。在实现过程中，上述方法的各步骤或以上各个单元可以通过处理器元件中的硬件的集成逻辑电路或者软件形式的指令完成。
例如，以上装置500、装置600、装置700以及装置800中的单元可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个特定集成电路(Application Specific Integrated Circuit，ASIC)，或，一个或多个微处理器(digital signal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)等。再如，当以上某个单元通过处理元件调度程序的形式实现时，该处理元件可以是通用处理器，例如中央处理器(Central Processing Unit，CPU)或其它可以调用程序的处理器。再如，这些单元可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现。
图9是本申请实施例提供的一种接入网设备900的结构示意图。
该接入网设备900其可以为以上实施例中的第一接入网设备或第二接入网设备，用于实现以上实施例中第一接入网设备或第二接入网设备的操作。如图9所示，该接入网设备包括：天线910、射频装置920、基带装置930。天线910与射频装置920连接。在上行方向上，射频装置920通过天线910接收终端发送的信息，将终端发送的信息发送给基带装置930进行处理。在下行方向上，基带装置930对终端的信息进行处理，并发送给射频装置920，射频装置920对终端的信息进行处理后经过天线910发送给终端。接入网设备之间，例如第一第一接入网设备与第二接入网设备之间，可以通过传输介质通信，该传输介质可以为有线介质，例如光纤；也可以为无线介质。
以上用于第一接入网设备或第二接入网设备的装置可以位于基带装置930，在一种实现中，图6或图8所示的各个单元通过处理元件调度程序的形式实现，例如基带装置930包括处理元件931和存储元件932，处理元件931调用存储元件932存储的程序，以执行以上方法实施例中第一接入网设备或第二接入网设备执行的方法。此外，该基带装置90还可以包括接口933，用于与射频装置920交互信息，该接口例如为通用公共无线接口(common public radio interface，CPRI)。
在另一种实现中，图6或图8所示的各个单元可以是被配置成实施以上第一接 入网设备或第二接入网设备执行的方法的一个或多个处理元件，这些处理元件设置于基带装置930上，这里的处理元件可以为集成电路，例如：一个或多个ASIC，或，一个或多个DSP，或，一个或者多个FPGA等。这些集成电路可以集成在一起，构成芯片。
例如，图6或图8所示的各个单元可以集成在一起，以SOC的形式实现，例如，基带装置930包括SOC芯片，用于实现以上方法。该芯片内可以集成处理元件931和存储元件932，由处理元件931调用存储元件932的存储的程序的形式实现以上第一接入网设备或第二接入网设备执行的方法或图6或图8所示各个单元的功能；或者，该芯片内可以集成至少一个集成电路，用于实现以上第一接入网设备或第二接入网设备执行的方法或图6或图8所示各个单元的功能；或者，可以结合以上实现方式，部分单元的功能通过处理元件调用程序的形式实现，部分单元的功能通过集成电路的形式实现。
不管采用何种方式，总之，以上用于第一接入网设备或第二接入网设备的配置装置包括至少一个处理元件和存储元件，其中至少一个处理元件用于执行以上方法实施例所提供的第一接入网设备或第二接入网设备执行的方法。处理元件可以以第一种方式：即执行存储元件存储的程序的方式执行以上方法实施例中SN或MN执行的部分或全部步骤；也可以以第二种方式：即通过处理器元件中的硬件的集成逻辑电路结合指令的方式执行以上方法实施例中第一接入网设备或第二接入网设备执行的部分或全部步骤；当然，也可以结合第一种方式和第二种方式执行以上方法实施例中第一接入网设备或第二接入网设备执行的方法。
这里的处理元件同以上描述，可以是通用处理器，例如CPU，还可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个ASIC，或，一个或多个DSP，或，一个或者多个FPGA等。
存储元件可以是一个存储器，也可以是多个存储元件的统称。
图10为本申请实施例提供的一种终端1000的结构示意图。其可以为以上实施例中的第一终端或者第二终端，用于实现以上实施例中第一终端或者第二终端的操作。如图10所示，该终端1000包括：处理元件1010、存储元件1020、收发元件1030。收发元件1030可以与天线连接。在下行方向上，收发元件1030通过天线接收基站等接入网设备发送的信息，并将信息发送给处理元件1010进行处理。在上行方向上，处理元件1010对终端的数据进行处理，并通过收发元件1030发送给接入网设备。
该存储元件1020用于存储实现以上方法实施例的程序，处理元件1010调用该程序，执行以上方法实施例的操作。
在另一种实现中，以上图7或图9中的各个单元可以是被配置成实施以上终端执行的方法的一个或多个处理元件，这些处理元件设置于终端的电路板，这里的处理元件可以为集成电路，例如：一个或多个ASIC，或，一个或多个DSP，或，一个或者多个FPGA等。这些集成电路可以集成在一起，构成芯片。
例如，以上图7或图9中的各个单元可以集成在一起，以SOC的形式实现，例如，终端包括该SOC芯片，用于实现以上方法。该芯片内可以集成处理元件1010和存储元件1020，由处理元件1010调用存储元件1020的存储的程序的形式实现以上方法或 以上图7或图9中各个单元的功能；或者，该芯片内可以集成至少一个集成电路，用于实现以上方法或以上图7或图9中各个单元的功能；或者，可以结合以上实现方式，部分单元的功能通过处理元件调用程序的形式实现，部分单元的功能通过集成电路的形式实现。
不管采用何种方式，总之，以上配置装置包括至少一个处理元件和存储元件，其中至少一个处理元件用于执行以上方法实施例所提供的方法。处理元件可以以第一种方式：即执行存储元件存储的程序的方式执行以上方法实施例中的部分或全部步骤；也可以以第二种方式：即通过处理元件中的硬件的集成逻辑电路结合指令的方式执行以上方法实施例中的部分或全部步骤；当然，也可以结合第一种方式和第二种方式执行以上方法实施例提供的方法。
这里的处理元件同以上描述，可以是通用处理元件，例如CPU，还可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个ASIC，或，一个或多个DSP，或，一个或者多个FPGA等。
存储元件可以是一个存储器，也可以是多个存储元件的统称。
图11为本申请实施例提供的一种通信系统1100的示意图。
该通信系统1100中包括：
第一接入网设备1101，该第一接入网设备1101可以执行图2-图4任一实施例中的第一接入网设备执行的操作。例如，可以是图6或图9所示实施例的接入网设备。
第二接入网设备1102，该第二接入网设备1102可以执行图2-图4任一实施例中的第二接入网设备执行的操作。例如，可以是图8或图9实施例所示的接入网设备。
该通信系统中还可以包括终端1103、及终端1104，终端1103可以执行图2-图4任一实施例中的第一终端执行的操作，可以是图5或图10实施例所述的终端；终端1104可以执行图2-图4任一实施例中的第二终端执行的操作，可以是图7或图10实施例所述的终端，在此不做赘述。
该通信系统也可以是如图1所示的通信系统。
本所属领域的技术人员可以清楚地了解到，本申请提供的各实施例的描述可以相互参照，为描述的方便和简洁，例如关于本申请实施例提供的各装置、设备的功能以及执行的步骤可以参照本申请方法实施例的相关描述，各方法实施例之间、各装置实施例之间也可以互相参照。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线 (例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。

Claims (32)

  1. 一种数据传输方法，其特征在于，包括：
    第一终端从第一接入网设备接收第一指示信息，其中，所述第一终端接入所述第一接入网设备，所述第一指示信息用于触发所述第一终端连接第二终端；
    所述第一终端根据所述第一指示信息连接所述第二终端；
    所述第一终端通过所述第二终端与第二接入网设备进行数据传输，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
  2. 根据权利要求1所述的方法，其特征在于，还包括：
    所述第一终端从所述第一接入网设备接收所述第一接入网设备的标识信息；
    所述第一终端向所述第二终端发送所述标识信息，以使得所述第二终端向第二接入网设备发送所述标识信息，其中，所述标识信息用于所述第二接入网设备向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
  3. 根据权利要求1所述的方法，其特征在于，还包括：
    所述第一终端从所述第一接入网设备接收所述第一接入网设备的第一标识信息以及所述第一接入网设备的邻接入网设备的第二标识信息；
    所述第一终端向所述第二终端发送所述第一标识信息和第二标识信息，以使得所述第二终端向所述邻接入网设备发送第二指示信息，其中，所述第二指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述邻接入网设备与所述第一终端间的通信链路。
  4. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一终端从所述第二终端接收至少一个接入网设备的标识信息，所述至少一个接入网设备中包括所述第二接入网设备；
    所述第一终端向所述第一接入网设备发送所述至少一个接入网设备的标识信息，以使得所述第一接入网设备请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
  5. 根据权利要求1所述的方法，其特征在于，还包括：
    所述第一终端从所述第一接入网设备接收所述第一接入网设备的邻接入网设备的标识信息；
    所述第一终端向所述第二终端发送所述邻接入网设备的标识信息，以使得所述第二终端从所述邻接入网设备中确定所述第二接入网设备；
    所述第一终端从所述第二终端接收所述第二接入网设备的标识信息；
    所述第一终端向所述第一接入网设备发送所述第二接入网设备的标识信息，以使得所述第一接入网设备请求添加所述第二接入网设备以传输所述第一接入网设备与所述 第一终端间的数据。
  6. 根据权利要求1-5任一所述的方法，其特征在于，
    所述第一终端为无人机终端；所述第二终端为地面终端。
  7. 一种数据传输方法，其特征在于，包括：
    第一接入网设备向第一终端发送第一指示信息，其中，所述第一终端接入所述第一接入网设备，所述第一指示信息用于触发所述第一终端连接第二终端，以使得所述第一终端通过所述第二终端与第二接入网设备进行数据传输，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
  8. 根据权利要求7所述的方法，其特征在于，还包括：
    所述第一接入网设备向所述第一终端发送所述第一接入网设备的标识信息，以使得所述第二接入网设备通过所述第二终端从所述第一终端接收所述标识信息，其中，所述标识信息用于所述第二接入网设备向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
  9. 根据权利要求7所述的方法，其特征在于，还包括：
    所述第一接入网设备向所述第一终端发送所述第一接入网设备的第一标识信息以及所述第一接入网设备的邻接入网设备的第二标识信息，以使得所述邻接入网设备通过所述第二终端从所述第一终端接收所述第二指示信息，其中，所述第二指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述邻接入网设备与所述第一终端间的通信链路。
  10. 根据权利要求7所述的方法，其特征在于，还包括：
    所述第一接入网设备从所述第一终端接收至少一个接入网设备的标识信息，所述至少一个接入网设备中包括所述第二接入网设备；
    所述第一接入网设备从所述至少一个接入网设备中确定所述第二接入网设备；
    所述第一接入网设备请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
  11. 根据权利要求7所述的方法，其特征在于，还包括：
    所述第一接入网设备向所述第一终端发送所述第一接入网设备的邻接入网设备的标识信息；以使得所述第二终端从所述第一终端接收所述邻接入网设备的标识信息并从所述邻接入网设备中确定所述第二接入网设备；
    所述第一接入网设备通过所述第一终端从所述第二终端接收所述第二接入网设备的标识信息；
    所述第一接入网设备求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
  12. 一种数据传输方法，其特征在于，包括：
    第二终端连接第一终端，其中，所述第一终端接入第一接入网设备；
    所述第二终端确定第二接入网设备，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
  13. 根据权利要求12所述的方法，其特征在于，还包括：
    所述第二终端从所述第一终端接收所述第一接入网设备的标识信息；
    所述第二终端向所述第二接入网设备发送所述标识信息，其中，所述标识信息用于所述第二接入网设备向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
  14. 根据权利要求12所述的方法，其特征在于，还包括：
    所述第二终端从所述第一终端接收所述第一接入网设备的第一标识信息以及所述第一接入网设备的邻接入网设备的第二标识信息；
    所述第二终端向所述邻接入网设备发送指示信息，所述指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述邻接入网设备与所述第一终端间的通信链路。
  15. 根据权利要求12所述的方法，其特征在于，还包括：
    所述第二终端向所述第一终端发送至少一个接入网设备的标识信息，所述至少一个接入网设备中包括所述第二接入网设备，以使得所述第一接入网设备从所述第一终端接收所述至少一个接入网设备的标识信息并请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
  16. 根据权利要求12所述的方法，其特征在于，还包括：
    所述第二终端从所述第一终端接收所述第一接入网设备的邻接入网设备的标识信息；
    所述第二终端确定第二接入网设备包括：所述第二终端从所述邻接入网设备中确定所述第二接入网设备；
    所述第二终端向所述第一终端发送所述第二接入网设备的标识信息，以使得所述第一接入网设备从所述第一终端接收所述第二接入网设备的标识信息并请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
  17. 一种装置，其特征在于，用于第一终端，所述第一终端接入第一接入网设备，所述装置包括：
    第一接收单元，用于从第一接入网设备接收第一指示信息，其中，所述第一指示信息用于触发所述第一终端连接第二终端；
    连接单元，用于根据所述第一指示信息连接所述第二终端，使得所述第一终端通过所述第二终端与第二接入网设备进行数据传输，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
  18. 根据权利要求17所述的装置，其特征在于，还包括发送单元,
    所述第一接收单元还用于从所述第一接入网设备接收所述第一接入网设备的标识信息；
    所述发送单元用于向所述第二终端发送所述标识信息，以使得所述第二终端向所述第二接入网设备发送所述标识信息，其中，所述标识信息用于所述第二接入网设备向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
  19. 根据权利要求17所述的装置，其特征在于，还包括发送单元,
    所述第一接收单元还用于从所述第一接入网设备接收所述第一接入网设备的第一标识信息以及所述第一接入网设备的邻接入网设备的第二标识信息；
    所述发送单元用于向所述第二终端发送所述第一标识信息以及所述第二标识信息，以使得所述第二终端向所述邻接入网设备发送所述第二指示信息，其中，所述第二指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
  20. 根据权利要求17所述的装置，其特征在于，还包括第二接收单元以及发送单元,
    所述第二接收单元还用于从所述第二终端接收至少一个接入网设备的标识信息，所述至少一个接入网设备中包括所述第二接入网设备；
    所述发送单元用于向所述第一接入网设备发送所述至少一个接入网设备的标识信息，以使得所述第一接入网设备请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
  21. 根据权利要求17所述的装置，其特征在于，还包括第二接收单元，第一发送单元以及第二发送单元，
    所述第一接收单元还用于从所述第一接入网设备接收所述第一接入网设备的邻接入网设备的标识信息；
    所述第一发送单元用于向所述第二终端发送所述邻接入网设备的标识信息，以使得所述第二终端从所述邻接入网设备中确定所述第二接入网设备；
    所述第二接收单元用于从所述第二终端接收所述第二接入网设备的标识信息；
    所述第二发送单元还用于向所述第一接入网设备发送所述第二接入网设备的标识信息，以使得所述第一接入网设备请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
  22. 根据权利要求17-21任一所述的装置，其特征在于，所述第一终端为无人机终端。
  23. 一种装置，用于第一接入网设备，其特征在于，包括：
    第一发送单元，用于向第一终端发送第一指示信息，其中，所述第一终端接入所述 第一接入网设备，所述第一指示信息用于触发所述第一终端连接第二终端，以使得所述第一终端通过所述第二终端与第二接入网设备进行数据传输，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
  24. 根据权利要求23所述的装置，其特征在于，
    所述第一发送单元还用于向所述第一终端发送所述第一接入网设备的标识信息，以使得所述第二接入网设备通过所述第二终端从所述第一终端接收所述标识信息，其中，所述标识信息用于所述第二接入网设备向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
  25. 根据权利要求23所述的装置，其特征在于，
    所述第一发送单元还用于向所述第一终端发送所述第一接入网设备的第一标识信息以及所述第一接入网设备的邻接入网设备的第二标识信息，以使得所述邻接入网设备通过所述第二终端从所述第一终端接收所述第二指示信息，其中，所述第二指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述邻接入网设备与所述第一终端间的通信链路。
  26. 根据权利要求23所述的装置，其特征在于，还包括:
    第一接收单元，用于从所述第一终端接收至少一个接入网设备的标识信息，所述至少一个接入网设备中包括所述第二接入网设备；
    确定单元，用于从所述至少一个接入网设备中确定所述第二接入网设备；
    第二发送单元，用于向所述第二接入网设备发送请求消息以请求添加所述第二接入网设备传输所述第一接入网设备与所述第一终端间的数据。
  27. 根据权利要求23所述的装置，其特征在于：
    所述第一发送单元还用于向所述第一终端发送所述第一接入网设备的邻接入网设备的标识信息；以使得所述第二终端从所述第一终端接收所述邻接入网设备的标识信息并从所述邻接入网设备中确定所述第二接入网设备；以及通过所述第一终端从所述第二终端接收所述第二接入网设备的标识信息；
    还包括第二发送单元，用于向所述第二接入网设备发送请求消息以请求添加所述第二接入网设备传输所述第一接入网设备与所述第一终端间的数据。
  28. 一种装置，其特征在于，用于第二终端，所述第二终端连接第一终端，所述第一终端接入第一接入网设备；
    所述装置包括确定单元，用于确定第二接入网设备，所述第二接入网设备用于传输所述第一接入网设备与所述第一终端间的数据。
  29. 根据权利要求28所述的装置，其特征在于，还包括:
    接收单元，用于从所述第一终端接收所述第一接入网设备的标识信息；
    发送单元，用于向所述第二接入网设备发送所述标识信息，其中，所述标识信息用 于所述第二接入网设备向所述第一接入网设备请求建立所述第二接入网设备与所述第一终端间的通信链路。
  30. 根据权利要求28所述的装置，其特征在于，还包括:
    接收单元，用于从所述第一终端接收所述第一接入网设备的第一标识信息以及所述第一接入网设备的邻接入网设备的第二标识信息；
    发送单元，用于向所述邻接入网设备发送指示信息，所述指示信息用于指示所述邻接入网设备确定是否向所述第一接入网设备请求建立所述邻接入网设备与所述第一终端间的通信链路。
  31. 根据权利要求28所述的装置，其特征在于，还包括:
    发送单元，用于向所述第一终端发送至少一个接入网设备的标识信息，所述至少一个接入网设备中包括所述第二接入网设备，以使得所述第一接入网设备从所述第一终端接收所述至少一个接入网设备的标识信息并请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
  32. 根据权利要求28所述的装置，其特征在于，还包括接收单元与发送单元，
    所述接收单元用于从所述第一终端接收所述第一接入网设备的邻接入网设备的标识信息；
    所述处理单元具体用于从所述邻接入网设备中确定所述第二接入网设备；
    所述发送单元用于向所述第一终端发送所述第二接入网设备的标识信息，以使得所述第一接入网设备从所述第一终端接收所述第二接入网设备的标识信息并请求添加所述第二接入网设备以传输所述第一接入网设备与所述第一终端间的数据。
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