WO2017177950A1

WO2017177950A1 - Connection establishment method, apparatus and system

Info

Publication number: WO2017177950A1
Application number: PCT/CN2017/080470
Authority: WO
Inventors: 王昕�
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-04-14
Filing date: 2017-04-13
Publication date: 2017-10-19
Also published as: CN107302773B; CN107302773A

Abstract

The present invention provides a connection establishment method, apparatus and system. The method comprises: a first node sends specified radio resource allocation information to a user equipment (UE), the specified radio resource allocation information being configured to instruct the UE to interrupt a connection with a second node and establish a connection with a third node. By means of the present invention, the problem in the related art of difficulty of a UE in matching control plane information with user plane information in a mobility flow process; by interrupting a connection with a second node and establishing a connection with a third node, the time required in the mobility flow is reduced, and time waste and data redundancy in base station handover is reduced, thereby achieving the effect of implementing precise time requirement in a data network.

Description

Method, device and system for establishing connection

Technical field

The present invention relates to the field of communications, and in particular to a method, device and system for establishing a connection.

Background technique

Today, 4G (the fourth generation) communication network technology has been widely deployed, and research on 5G (the fifth generation) communication network technology has also been put on the agenda. The 5G network strives to achieve an order of magnitude increase in data capacity and transmission speed compared to the 4G network, and can be applied to various scenarios, support various architectures, and be compatible with various terminals at a low cost. On the other hand, superior performance also means that the deployment of 5G networks will become more complicated.

Looking into the future, the Radio Access Network (RAN) is within the coverage of a macro base station (Macro eNB, MeNB) that has been widely deployed and has an S1 interface with the Core Network (CN). Selective and targeted deployment of low-power small-station nodes (SeNBs) is a deployment strategy commonly used by communication operators.

1 is a schematic diagram of a system architecture of a communication network, as shown in FIG. 1 , which is a system architecture form applicable to the present invention. Various types of small station nodes are deployed within the coverage of a macro base station, where SeNB-1 and SeNB -2 has an interface (wired interface or wireless interface) with the MeNB, and whether an S1-U interface is established with the Serving Gateway (S-GW) in the CN is optional. An anchor node (logical node) that can manage a cluster of small station nodes may be deployed in the coverage of the MeNB. The node may be called a SeNB Anchor (S-Anchor), and a wired interface (such as an X2 interface) is established between the MeNB and the MeNB. Whether an S1-U interface is established with the S-GW is optional. The SeNB-3 and the SeNB-4 belong to the management scope of the S-Anchor, and the interface between the two small station nodes and the S-Anchor may be a wired interface (ideal or non-ideal performance interface) or a wireless interface. In addition, it is optional to establish an interface between each station node.

When a user equipment (UE) with multiple transceivers (Multiple Rx/Tx) is in a dual connectivity (DC) or multiple connectivity (MC) state, the control plane portion of the wireless Uu interface, that is, The Radio Resource Control Connection (RRC Connection) is established between the UE and the MeNB or S-Anchor in the RAN. Wherein, when the RRC Connection is established between the UE and the S-Anchor, in the wireless interface part (or from the perspective of the UE), the role of the S-Anchor on the control plane is equivalent to that of the MeNB, and therefore is described below. In the scheme, the description of the scheme of the MeNB is also applicable to the S-Anchor, and the repeated description is not repeated.

The user plane part of the Uu interface, that is, the Data Radio Bearer (DRB), may be established between the UE and the MeNB or the S-Anchor, and between the UE and the at least one SeNB. Further, according to the use of the node resources of the DRB in the network side, the types of the DRBs may be the following three types: 1) the radio protocol stack in the network side is located only in the MeNB, that is, the evolved universal terrestrial radio access network using only the MeNB resources. (E-UTRAN) The radio access bearer (E-UTRAN Radio Access Bearer (E-RAB) is called the Master Cell Group Bearer (MCG bearer), 2) The radio protocol stack is only located in the SeNB, that is, only The E-RAB of the SeNB resource is called a secondary cell group bearer (Secondary Cell) Group Bearer, SCG bearer), 3) The bearer of the radio protocol stack located in the MeNB and the SeNB, that is, the MeNB and the SeNB resources are simultaneously referred to as a split bearer; FIG. 2 is a schematic diagram of the user plane bearer mode of the communication network, three types The type of DRB can be referred to E-RAB #1 to 3 in FIG. 2, respectively. The S-Anchor may be a user plane intermediate node between the S-GW and the SeNB, or between the MeNB and the SeNB, and the S-Anchor does not provide the UE with the radio resources of the user plane.

The architecture of the DC/MC enables the UE to occupy the radio resources of two or more base stations, so the data throughput of the user plane is improved; on the other hand, the SeNB may be able to support various radio access technologies (Radio Access Technology, RAT). ), such as wireless LAN (WLAN), millimeter wave, etc., so the transmission speed of the underlying link has also been greatly improved. It can be seen that in the 5G communication system, the performance of the user plane will be greatly developed; however, it is difficult to rely on the control plane mobility process in the existing communication system to develop with the user plane. Matching, therefore, in order to enable users to obtain a high-quality experience in the process of moving, mobility-related decision-making and execution must be more precise and fast.

In view of the above problems in the related art, no effective solution has been found yet.

Summary of the invention

The invention provides a method, a device and a system for establishing a connection, so as to at least solve the problem that the control plane information is difficult to match the user plane information in the related process in the related process.

According to an aspect of the present invention, a method for establishing a connection is provided, including: a first node transmitting specified radio resource configuration information to a user equipment UE, wherein the specified radio resource configuration information is set to indicate that the UE disconnects The second node is connected and establishes a connection with the third node.

Optionally, before the sending, by the first node, the specified radio resource configuration information to the user equipment, the method further includes: the first node making a base station transfer procedure or the base station release procedure to the UE; The third node sends a request message for requesting the third node to accept the UE, and receives an acknowledgement message replied by the third node.

According to an aspect of the present invention, a method for establishing another connection is provided, comprising: receiving specified radio resource configuration information; disconnecting from a second node according to the specified radio resource configuration information and establishing a connection with a third node.

Optionally, disconnecting from the second node according to the specified radio resource configuration information and establishing a connection with the third node includes: establishing a designated protocol entity corresponding to the third node according to the specified radio resource configuration information.

According to another aspect of the present invention, a connection establishment system is provided, comprising: a macro base station MeNB, a UE, a first small station node SeNB1, and a second small station node SeNB2; wherein the MeNB sends a designation to the UE Radio resource configuration information, wherein the specified radio resource configuration information is set to instruct the UE to disconnect from the first small station node SeNB1 and establish a connection with the second small station node SeNB2.

According to still another aspect of the present invention, a connection establishing apparatus is provided, including: a receiving module, configured to receive a finger The radio resource configuration information is set, and the processing module is configured to disconnect from the second node according to the specified radio resource configuration information and establish a connection with the third node.

According to still another aspect of the present invention, a connection establishing apparatus is provided, including: a sending module, configured to send, by a first node, specified radio resource configuration information to a user equipment UE, where the specified radio resource configuration information is set to an indication The UE disconnects from the second node and establishes a connection with the third node.

According to still another aspect of the present invention, a terminal includes a processor and a memory, the processor configured to receive specified radio resource configuration information, and disconnect from the second node according to the specified radio resource configuration information Establishing a connection with a third node; the memory being configured to be coupled to the processor.

According to still another aspect of the present invention, a computer storage medium storing computer executable instructions configured to perform the method of establishing the above connection is provided.

With the present invention, the first node is used to send the specified radio resource configuration information to the user equipment UE, where the specified radio resource configuration information is set to instruct the UE to disconnect from the second node and establish a connection with the third node. The problem that the control plane information is difficult to match the user plane information during the mobility process in the related art is solved, and the time required for the mobility process is reduced by disconnecting from the second node and establishing a connection with the third node. In turn, the time waste and data redundancy at the time of base station handover are reduced, and the effect of realizing accurate time requirements in the data network is achieved.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic diagram of a system architecture of a communication network according to the related art of the present invention;

2 is a schematic diagram of a user plane bearer mode of a communication network according to the related art of the present invention;

3 is a flow chart of a method for establishing a connection according to an embodiment of the present invention;

4 is a flow chart of another method of establishing a connection according to an embodiment of the present invention;

FIG. 5 is a structural block diagram of a connection establishment system according to an embodiment of the present invention; FIG.

6 is a structural block diagram of a connection establishing apparatus according to an embodiment of the present invention;

FIG. 7 is a schematic flow chart of a specific embodiment of the present invention; FIG.

8 is a schematic flow chart of a second embodiment of the present invention;

FIG. 9 is a schematic flow chart of a third embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that, in the absence of conflict, The embodiments in the present application and the features in the embodiments may be combined with each other.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

The system architecture on which the present embodiment is based may be the system architecture described in Figures 1 and 2.

Wherein, the type of the small station node, the number and number of RATs that can be supported, whether to establish a wired interface with the core network, and between the small station nodes, between the small station nodes and the macro base stations, between the small station nodes and the anchor nodes The form or type of interface is not limited. On the other hand, there is no restriction on the number of serving base stations and the types and number of service carriers of multiple Rx/Tx UEs. In the framework illustrated in Figures 1 and 2, the case is valid and applicable.

In this embodiment, a method for establishing a connection is provided, which is applied to a network side, including a core network element, an access network element, such as a macro base station MeNB, and a small station node SeNB. FIG. 3 is a schematic diagram of a small station node SeNB according to an embodiment of the present invention. A flowchart of a method for establishing a connection is shown in FIG. 3, and the process includes the following steps:

Step S302: The first node sends the specified radio resource configuration information to the user equipment UE, where the designated radio resource configuration information is set to instruct the UE to disconnect from the second node and establish a connection with the third node.

Optionally, the first node may be a macro base station that is connected to the core network, the second node may be a base station currently connected by the UE, that is, the serving base station before the transfer, and the third node may be the transferred base station, that is, the target base station. . The specified radio resource configuration information may be newly configured radio resource configuration information, and is carried in a Radio Resource Control (RRC) message for transmission.

Through the foregoing steps, the first node is used to send the specified radio resource configuration information to the user equipment UE, where the designated radio resource configuration information is set to instruct the UE to disconnect the second node and establish a connection with the third node, and the related information is resolved. In the technology, in the process of the mobility process, the UE is difficult to match the user plane information in the process of the mobility process. By disconnecting from the second node and establishing a connection with the third node, the time required for the mobility process is reduced, thereby reducing the time. Time wastage and data redundancy at the time of base station handover, achieving the effect of achieving precise time requirements in the data network.

In an optional implementation manner of this embodiment, before the sending, by the first node, the specified radio resource configuration information to the user equipment, the method further includes:

S11. The first node makes a decision for the UE to transfer the SeNB change procedure to the UE or the base station releases the SeNB release program.

S12. The first node sends, to the third node, a request message for requesting the third node to accept the UE, and receiving a confirmation message of the third node reply.

Optionally, the sending, by the first node, the specified radio resource configuration information to the UE includes: sending, by the first node, a message indicating that the UE context is released to the second node that is connected to the UE, and sending the specified radio resource configuration information to the UE, and the third Node related cell information.

In an optional implementation manner of this embodiment, after the first node sends the specified radio resource configuration information to the user equipment UE, the method further includes:

The second node continues to maintain data transmission with the UE;

A specified threshold for triggering the mobility procedure is set, wherein the mobility procedure includes: instructing the UE to disconnect from the second node, and instructing the UE to establish a connection with the third node.

According to the foregoing optional implementation manner, after setting the specified threshold value of the trigger mobility procedure, the method further includes: performing a mobility procedure according to the specified threshold value, wherein the specified threshold value includes at least one of the following: a data packet Threshold number of retransmissions, signal quality threshold of the radio interface.

Performing the mobility process according to the specified threshold includes the following two optional implementation modes. In the actual process, the judgment may be performed separately or in combination, and the mobility process may be performed if both conditions are satisfied:

The first mode: when the second node repeatedly transmits the specified number of data packets to reach the retransmission threshold of the data packet, instructing the UE to disconnect the second node and establish a connection with the third node;

The second mode: when the signal quality of the radio interface between the second node and the UE is lower than the signal quality threshold of the radio interface, or when the data packet of the second node is transmitted, the UE is instructed to disconnect from the second node. And establish a connection with the third node.

Optionally, according to the actual scenario, setting a threshold for the number of retransmissions of the data packet may be, but is not limited to, the following two forms:

When the number of retransmissions of the data packet is counted in the hybrid automatic repeat request HARQ entity, the threshold of the number of retransmissions of the set data packet is less than the value of the HARQ retransmission number that causes the radio link control RLC entity to perform the automatic retransmission request ARQ mechanism. ;

When the number of retransmissions of the data packet is counted in the RLC entity, the threshold of the number of retransmissions of the set data packet is less than the value of the number of ARQ retransmissions that would cause the radio link to fail the RLF.

Optionally, the user plane architecture mode of the retransmission threshold of the data packet includes at least one of the following: the secondary cell group carries the SCG bearer user plane architecture mode, and the split bearer user plane architecture mode is distributed.

Optionally, the threshold of the number of retransmissions of the data packet is set to be a split bearer user plane architecture mode in the following situations: the data packet to be transmitted is stored in the RLC buffer area of the second node.

Optionally, in the user plane architecture mode of the split bearer, when all the data packets in the RLC buffer of the second node have been transmitted, the UE is disconnected by the control plane information in the underlying protocol entity. The connection of the two nodes and the establishment of a connection with the third node.

Optionally, in the user plane architecture mode of the split bearer, if the data packet has been transmitted before the UE disconnects from the second node, when the first node has indicated that data forwarding is required, The second node replies to the first node with indication information for notifying that the downlink data packets have been successfully transmitted.

In this embodiment, another method for establishing a connection is provided, which is applied to a terminal side, such as a smart phone. FIG. 4 is a flowchart of another method for establishing a connection according to an embodiment of the present invention, as shown in FIG. The process includes the following steps:

Step S402, receiving designated radio resource configuration information;

Step S404, disconnecting from the second node according to the specified radio resource configuration information and establishing a connection with the third node.

In an optional implementation manner of the embodiment of the present invention, disconnecting from the second node according to the specified radio resource configuration information and establishing a connection with the third node includes:

S21: Establish a protocol entity corresponding to the third node according to the specified radio resource configuration information, use the specified protocol entity to connect with the second node, and perform communication and data interaction on the protocol entity.

In an optional implementation manner of the embodiment of the present invention, before disconnecting from the second node according to the specified radio resource configuration information, the method further includes at least one of: receiving a retransmission threshold of the data packet, receiving a signal of the radio interface Quality threshold.

In an optional implementation manner according to the embodiment of the present invention, disconnecting from the second node according to the specified radio resource configuration information and establishing a connection with the third node includes at least one of the following: the UE continues to maintain data transmission with the second node. At the same time, when the number of times the designated data packet is transmitted with the second node reaches the threshold number of retransmission times of the data packet, the mobility procedure is performed;

While the UE continues to maintain data transmission with the second node, the mobility procedure is performed when the signal quality of the wireless interface with the second node is lower than the signal quality threshold of the wireless interface;

The mobility process includes: disconnecting from the second node, establishing a connection with the third node.

Optionally, when the mobility procedure is to disconnect the connection with the second node, the method further includes: sending a disconnected information indication to the second node.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods of various embodiments of the present invention.

In this embodiment, a connection establishment system and device are also provided, which are arranged to implement the above-mentioned embodiments and preferred embodiments, and are not described again. As used hereinafter, the term "module" can implement a combination of at least one of the software hardware of the predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

FIG. 5 is a structural block diagram of a connection establishment system according to an embodiment of the present invention. As shown in FIG. 5, the system includes:

Macro base station MeNB50, UE52, first small station node SeNB1 54, second small station node SeNB2 56;

The MeNB transmits the designated radio resource configuration information to the UE, and the designated radio resource configuration information is set to instruct the UE to disconnect the first small station node SeNB1 and establish a connection with the second small station node SeNB2.

FIG. 6 is a structural block diagram of a device for establishing a connection according to an embodiment of the present invention. As shown in FIG. 6, the device includes:

The receiving module 60 is configured to receive the specified radio resource configuration information.

The processing module 62 is configured to disconnect from the second node according to the specified radio resource configuration information and establish a connection with the third node.

The processing module 62 is configured to establish a protocol entity corresponding to the third node according to the specified radio resource configuration information.

The processing module 62 is further configured to receive at least one of the following: receiving a retransmission threshold of the data packet, and receiving a signal quality threshold of the radio interface.

The processing module 62 is configured to: at least one of the following: the UE continues to maintain data transmission with the second node, and the number of times the designated data packet is transmitted with the second node reaches a threshold number of retransmission times of the data packet Performing a mobility procedure; the UE continues to maintain data transmission with the second node, when a signal quality of a wireless interface with the second node is lower than a signal quality threshold of the wireless interface, Executing a mobility process; wherein the mobility process comprises: disconnecting from the second node, establishing a connection with the third node.

The processing module 62 is further configured to send a disconnected information indication to the second node.

Here, an embodiment of another connection establishing apparatus is further provided, where the connection establishing apparatus includes: a sending module, configured to send, by the first node, specified radio resource configuration information to the user equipment UE, where the specified wireless The resource configuration information is configured to instruct the UE to disconnect from the second node and establish a connection with the third node.

Optionally, the sending module is further configured to: the first node sends a base station to the UE to perform a SeNB change procedure or the base station releases a SeNB release procedure; the first node sends the third node to request the request The third node accepts the request message of the UE, and receives an acknowledgement message replied by the third node.

Optionally, the sending module is configured to send, by the first node, a message for indicating release of the UE context to a second node that is connected to the UE, and send the specified radio resource configuration information to the UE. And cell information related to the third node.

Optionally, the sending module is further configured to: at least one of: the second node continues to maintain data transmission with the UE; and sets a specified threshold that triggers a mobility procedure, where the mobility The process includes: instructing the UE to disconnect from the second node, and instructing the UE to establish a connection with the third node.

After setting a specified threshold for triggering the mobility procedure, performing a mobility procedure according to the specified threshold, where the specified threshold includes at least one of: a retransmission threshold of the data packet, a wireless interface Signal quality threshold.

Optionally, performing the mobility procedure according to the specified threshold includes at least one of: indicating, when the second node repeatedly transmits the specified number of data packets to reach a retransmission threshold of the data packet, indicating the UE Disconnecting from the second node and establishing a connection with the third node; when a signal quality of a radio interface between the second node and the UE is lower than a signal quality threshold of the radio interface Or, when the data transmission of the second node is completed, instructing the UE to disconnect from the second node and establishing a connection with the third node.

Optionally, setting a threshold of the number of retransmissions of the data packet includes: when the number of retransmission times of the data packet is counted in the hybrid automatic repeat request HARQ entity, setting a threshold of the retransmission times of the data packet is less than a wireless chain Road control RLC entity execution The number of HARQ retransmission times of the automatic retransmission request ARQ mechanism; when the number of retransmission times of the data packet is counted in the RLC entity, setting the retransmission number threshold of the data packet to be smaller than the ARQ retransmission that causes the radio link failure RLF The number of times.

Optionally, the threshold of the number of retransmissions of the data packet is set to be a split bearer user plane architecture mode in a case where a data packet to be transmitted is stored in an RLC buffer area of the second node.

Optionally, the sending module is further configured to: in a user plane architecture mode of the split bearer split bearer, when all the data packets in the RLC buffer area of the second node have been transmitted, pass through the underlying protocol entity. The control plane information indicates that the UE disconnects from the second node and establishes a connection with the third node.

Optionally, the sending module is further configured to: in a user plane architecture mode of the split bearer split bearer, in a case that the data packet has been transmitted before the UE disconnects from the second node, When the first node has indicated that data forwarding is required, the second node replies to the first node with the indication information that the downlink data packet has been successfully sent.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.

The following is a detailed description in conjunction with an alternative embodiment in accordance with the present invention:

First, the functions of the devices in the embodiment are described, including: an MeNB node, a SeNB node, and a UE node, as follows:

For the MeNB node: After making a decision of SeNB change or SeNB release and performing interface message communication with the relevant SeNB, the MeNB sends an RRC message containing mobility information to the UE, where the message contains new radio resource configuration information. Optionally, the event information is further included, where the event information is at least a value of a retransmission time of the data packet or a signal quality threshold of the wireless interface.

For the SeNB node: after receiving the X2-AP message of the MeNB's notification to release the context of the specific UE, the s-SeNB (in the SeNB Release procedure, that is, the current serving SeNB of the UE) continues to maintain data transmission with the specific UE, And set the value of the number of retransmissions of a data packet or the signal quality threshold of the wireless interface. When the number of retransmissions of a certain data packet of the UE or the signal quality of the radio interface with the UE reaches the value, the s-SeNB passes the underlying protocol entity (such as a Medium Access Control (MAC) or a physical layer. The control plane information in (Physical Layer, PHY)) indicates that the UE performs a mobility procedure, that is, leaves the source cell (s-SeNB cell), the access target cell (t-SeNB cell or MeNB cell).

Optionally, there are at least two options for the number of retransmissions of the packet:

The value of the number of retransmissions of the Hybrid Automatic Repeat Request (HARQ) entity in the MAC: the value of the number of retransmissions needs to be smaller than the HARQ retransmission in the prior art that triggers the upper layer entity to perform the ARQ mechanism. Value. When such a setting is made, the t-SeNB performs retransmission of the data packet according to the status report reported by the UE.

The value of the number of retransmissions in the automatic repeat request (ARQ) mechanism in the Radio Link Control (RLC) sublayer: the value of the number of retransmissions needs to be smaller than that in the prior art to cause wireless The value of the number of ARQ retransmissions of the link failure (RLF). When performing such setting, the network side may not necessarily require the UE to send a status report after accessing the target cell.

The above scheme for utilizing the value of the retransmission times of the data packet is applicable to the case where the user plane architecture mode of the SeNB is SCG bearer and splitbearer, wherein, for the latter, it is more suitable for the s-SeNB's RLC buffer area to be transmitted yet. When the packet is.

For the split bearer, optionally, if all the data packets in the RLC buffer area of the s-SeNB have been transmitted, the s-SeNB can also instruct the UE to perform the control plane information in the underlying protocol entity (such as MAC or PHY). The mobility procedure, that is, leaving the source cell and accessing the target cell. In addition, in this case, even if the MeNB indicates that data forwarding is required, the s-SeNB may reply with an indication message to notify that the data forwarding is no longer performed.

For the UE node: after receiving the RRC message, the UE establishes a necessary protocol entity according to the new radio resource configuration information in the message, and maintains data transmission with the s-SeNB; the mobility information in the RRC message indicates that the UE changes the SeNB. The node either releases the current SeNB. Optionally, if event information is included in the RRC message, when the event information value is met, the UE performs a mobility procedure, that is, leaving the source cell and accessing the target cell. The event information may be a channel quality threshold of the radio interface between the UE and the s-SeNB, or may be a retransmission number of the user plane data packet between the UE and the s-SeNB. Optionally, when leaving the source cell, the UE may send an indication of leaving information to the s-SeNB.

In the DC/MC system architecture, the existing mobility procedure, such as transferring the UE context from the source SeNB (s-SeNB) to the target SeNB (target SeNB, t-SeNB), and A procedure for changing the configuration of the SCG from the s-SeNB to the t-SeNB in the UE (this procedure is referred to as SeNB change in the existing standard), and a procedure for releasing the UE context in the current serving SeNB (in existing standards) This procedure is called SeNB Release) and is determined and triggered by the MeNB.

In other words, although the SeNB change and Release procedures are likely not related to changes in the MCG side radio resource configuration, the control plane signaling and user plane data on the wired interface and the radio interface need to be determined and transmitted via the MeNB; The decision made by the MeNB and the signaling of the transmission need to be processed by the RRC entity (belonging to Layer 3, Layer 3), that is, the de-encapsulation has a higher execution point level, which all lengthens the mobility process to a certain extent. Time, so it is difficult to achieve accurate time requirements in 5G networks.

Optionally, in the user plane data forwarding mechanism of the existing mobility procedure, the forwarded data may have a lot of redundancy due to process design and time precision, etc., which causes SeNBs, SeNBs, and MeNBs. A waste of resources on the interface (especially when the wireless interface).

The present invention will be further described in detail below in conjunction with specific embodiments:

Specific embodiment 1

In the system architecture of the present invention, the MeNB configures the bearer type of the UE to be the MCG bearer and the SCG bearer respectively, and the M2 interface between the MeNB and the SeNB has no direct interface between the SeNBs. When the MeNB determines that the secondary base station of the UE needs to be changed from the s-SeNB to the t-SeNB, the mobility procedure is performed as follows. FIG. 7 is a schematic flowchart of the first embodiment of the present invention, as shown in FIG. The steps shown in Figure 7, the specific embodiment 1 includes:

Step 1: This embodiment is a preparation phase for the SeNB change. According to the L3 measurement report of the UE, the MeNB decides to transfer the context of the UE from the s-SeNB to the t-SeNB. The MeNB sends an X2-AP message (such as a SeNB addition request message) to the t-SeNB, where the message carries the UE context including the current MCG and SCG bearer resource configuration information; optionally, if the MeNB determines that an SCG bearer needs to perform data Forwarding, the message also carries the X2 tunnel port address allocated by the MeNB for forwarding data.

If the t-SeNB determines that the UE can be admitted (the admission control mechanism is the same as the prior art), the response message (such as the SeNB addition request acknowledgement message) that the t-SeNB replies to the MeNB carries the t-SeNB as the accepted SCG bearer. New radio resource configuration information; optionally, if the t-SeNB accepts the request for data forwarding, the message also carries the X2 tunnel port address allocated by the t-SeNB for forwarding data.

Step 2: The execution phase referred to as SeNB change in the present invention. After receiving the acknowledgment message from the t-SeNB, the MeNB sends an X2-AP message (such as a SeNB release message) to the s-SeNB to indicate that the s-SeNB can release the context of the UE, and the message also carries the MeNB as the forwarding data. On the other hand, the RRC connection reconfiguration message is sent to the UE, and the message carries the new radio resource configuration information and the target cell information of the accepted SCG bearer.

After receiving the X2 message, the s-SeNB still maintains the data transmission with the UE; after receiving the RRC message, the UE establishes the protocol entity of the SCG bearer corresponding to the t-SeNB according to the new resource configuration information, and replies to the MeNB. The RRC connects the reconfiguration complete message while maintaining data transmission with the s-SeNB. In the process of data transmission, when a data packet is retransmitted and the number of retransmissions reaches the set number of retransmission times, the UE performs a secondary base station change procedure, that is, leaves the source cell and passes the random access procedure. To access the target cell.

The number of retransmission times of the data packet may be set in the HARQ entity or in the RLC entity. For the former, the retransmission times threshold is set to be smaller than the value of the HARQ retransmission times in the prior art that causes the RLC entity to perform the ARQ mechanism. For the latter, the retransmission threshold is set to be smaller than the ARQ retransmission times value of the RLF in the prior art.

The retransmission number mechanism may be performed by the UE, or performed by the s-SeNB, or performed by both the UE and the s-SeNB. Optionally, when the UE counts to the retransmission threshold, the UE leaves the source cell and may leave. The information is indicated to the s-SeNB by the underlying protocol entity information. When the s-SeNB counts to the retransmission threshold, the s-SeNB no longer performs packet transmission scheduling on the UE, and indicates that the UE leaves the source cell through the underlying protocol entity information. The underlying protocol entity information may be MAC information or PHY information.

The retransmission threshold may be determined by the MeNB and notified to at least one of the s-SeNB and the UE, or may be determined by the s-SeNB and optionally notified to the UE.

Step 3: In the present invention, the data forwarding phase in the SeNB change is referred to. When the UE leaves the source cell, the s-SeNB starts to forward the data packet to the MeNB and further forwards it to the t-SeNB by the MeNB. Packets that need to be forwarded can With the prior art, only the data packet transmission status in the Packet Data Convergence Protocol (PDCP) entity is based on the time when the UE leaves the source cell.

Step 4: This is referred to as the completion phase of the SeNB change in the present invention. 401 to 403 are similar to the completion phase of the handover procedure in the prior art. For example, the network side may decide whether the UE needs to upload a status report, and if necessary, the t-SeNB selects a data packet to be retransmitted according to the status report of the UE.

Specific embodiment 2

In the system architecture of the present invention, the MeNB configures the bearer type of the UE to be a Split bearer, and the MeNB is an X2 interface between the MeNB and the SeNB. When the MeNB determines that the secondary base station of the UE needs to be changed from the s-SeNB to the t-SeNB, the mobility procedure is performed as follows. FIG. 8 is a schematic diagram of the procedure of the second embodiment, as shown in FIG. The specific steps of the second embodiment include:

Step 1: It is similar to the preparation phase of the SeNB change in the first embodiment, except that the bearer type in this embodiment is no longer an MCG/SCG bearer but a split bearer. Optionally, the s-SeNB can receive the PHY measurement report of the two-node wireless interface by the UE.

Step 2: After receiving the acknowledgment message from the t-SeNB, the MeNB sends an SeNB release message to the s-SeNB, where the message carries the X2 tunnel port address allocated by the MeNB for forwarding data, and stops transmitting the splitbearer to the s-SeNB. On the other hand, the RRC connection reconfiguration message is sent to the UE, and the message carries the radio resource configuration information allocated by the t-SeNB for the Split bearer, and the target cell information.

After receiving the X2 message, the s-SeNB still maintains data transmission with the UE; after receiving the RRC message, the UE establishes a protocol entity corresponding to the split bearer and the t-SeNB according to the new radio resource configuration information, and replies to the MeNB. The RRC connects the reconfiguration complete message while maintaining data transmission with the s-SeNB. In the process of data transmission, if the signal quality of the radio interface between the UE and the s-SeNB drops to a set threshold, or the data packet corresponding to the s-SeNB side is transmitted, the UE performs a secondary base station change procedure, that is, From the open source cell, access the target cell through a random access procedure.

The signal quality threshold of the radio interface between the UE and the s-SeNB may be an instantaneous value or a short-term average less than the L3 filtering time. In addition, the radio interface signal quality judging mechanism may be determined by the UE after self-determination, or judged by the s-SeNB after being reported by the UE, and the node performing the judgment may notify the information of the underlying protocol entity (MAC or PHY) after obtaining the judgment result. The peer node. Optionally, the signal quality threshold of the radio interface may be determined by the MeNB and notified to at least one of the s-SeNB UEs, and may also be determined by the s-SeNB and optionally notified to the UE.

The data transmission scheme may be that the s-SeNB transmits the data packet in the split bearer protocol entity buffer area (such as the RLC buffer) (that is, the downlink data), or may be the data packet that the UE splits the bearer in the RLC buffer. After the transmission is completed (that is, the uplink data), optionally, the transmitted node notifies the completion information to the opposite node through the protocol entity (RLC or MAC or PHY) information.

Step 3: If the s-SeNB determines that the data packets in the RLC buffer have been successfully transmitted, the s-SeNB may not need to perform downlink data forwarding again; when the uplink data is also configured as a split bearer, if the s-SeNB receives the UE indication Upstream When the data packet is transmitted, the s-SeNB may not need to forward the uplink data. Otherwise, the data forwarding is similar to the data forwarding phase (step 3) in the first embodiment.

Step 4: Similar to the completion phase (step 4) in the first embodiment, except that it is no longer necessary to initiate a path conversion procedure to the MME/S-GW node.

Concrete embodiment 3

In the system architecture of the present invention, the MeNB configures the bearer type of the UE to be a Split bearer, and the MeNB is an X2 interface between the MeNB and the SeNB. When the MeNB determines that the UE needs to release the SeNB, the process is performed as follows. FIG. 9 is a schematic diagram of the procedure of the third embodiment. As shown in FIG. 9 , in combination with the steps shown in FIG. 9 , the specific embodiment 3 includes:

Step 1: After releasing the UE context of the SeNB according to the measurement report of the UE or the load condition of the SeNB, the MeNB sends an SeNB release message to the SeNB, and the message may carry the X2 tunnel port address allocated by the MeNB for forwarding data, and stops at the same time. The SeNB continues to transmit the data packet of the split bearer. On the other hand, the RRC connection reconfiguration message is sent to the UE, and the message carries at least the configuration information indicating that the UE releases the SeNB side protocol stack corresponding to the Split bearer.

Step 2: After receiving the X2 message, the SeNB still maintains data transmission with the UE. After receiving the RRC message, the UE stores new radio resource configuration information while maintaining data transmission with the SeNB. In the process of data transmission, if the data packet transmission between the UE and the SeNB is completed, the UE releases the interface with the SeNB, releases the protocol entity corresponding to the SeNB side according to the indication of the radio resource configuration information, and returns an RRC connection to the MeNB. Reconfiguration complete message. The specific content of the data transmission mechanism is similar to that of the specific embodiment 2.

Step 3: The data forwarding and completion phase is the same as

steps

3 and 4 in the second embodiment.

The system architecture and the user plane protocol stack mode of this embodiment can be widely deployed in future communication networks, and the scenario of this embodiment occurs frequently in future mobile communication networks. In the scenario of the embodiment, compared with the related technology, the interruption time of the user plane data transmission can be reduced and the load of the data packet forwarding can be reduced in a certain program, so that the user can obtain the demand even in the process of moving. Communication experience.

An embodiment of the present invention further provides a terminal, including a processor and a memory, where the processor is configured to receive specified radio resource configuration information, and disconnect from the second node according to the specified radio resource configuration information, and the third The node establishes a connection; the memory is configured to be coupled to the processor.

Optionally, the processor is configured to establish, according to the specified radio resource configuration information, a specified protocol entity protocol entity corresponding to the third node.

Optionally, the processor is further configured to: at least one of: receiving a retransmission threshold of the data packet, and receiving a signal quality threshold of the radio interface. The UE continues to maintain data transmission with the second node, and performs a mobility procedure when the number of times the designated data packet is transmitted with the second node reaches a threshold number of retransmission times of the data packet; the UE continues to maintain Data transmission with the second node, the signal quality of the wireless interface between the second node and the second node is lower than that of the wireless interface When the signal quality threshold is exceeded, the mobility procedure is performed; wherein the mobility procedure comprises: disconnecting from the second node, establishing a connection with the third node.

Optionally, the processor is further configured to send a disconnected information indication to the second node.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1. The first node sends the specified radio resource configuration information to the user equipment UE, where the specified radio resource configuration information is set to instruct the UE to disconnect from the second node and establish a connection with the third node.

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. A variety of media that can store program code, such as a disc or a disc.

Optionally, in this embodiment, the processor, according to the stored program code in the storage medium, the first node sends the specified radio resource configuration information to the user equipment UE, where the designated radio resource configuration information is set to indicate that the UE disconnects The second node is connected and establishes a connection with the third node.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

S2. Receive specified radio resource configuration information.

S3. Disconnect from the second node according to the specified radio resource configuration information and establish a connection with the third node.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. Perform the steps shown or described Alternatively, each of them may be fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof may be fabricated into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A method for establishing a connection, including:

The first node sends the specified radio resource configuration information to the user equipment UE, wherein the specified radio resource configuration information is set to instruct the UE to disconnect from the second node and establish a connection with the third node.
The method of claim 1, wherein before the first node sends the specified radio resource configuration information to the user equipment UE, the method further includes:

Determining, by the first node, a base station transfer procedure or a base station release procedure to the UE;

The first node sends a request message for requesting the third node to accept the UE to the third node, and receives an acknowledgement message replied by the third node.
The method of claim 1, wherein the transmitting, by the first node, the specified radio resource configuration information to the UE comprises:

Sending, by the first node, a message for indicating release of the UE context to a second node connected to the UE, and sending the specified radio resource configuration information and cell information related to the third node to the UE .
The method according to claim 1, wherein after the first node sends the specified radio resource configuration information to the user equipment UE, the method further comprises at least one of the following:

The second node continues to maintain data transmission with the UE;

And setting a specified threshold for triggering the mobility procedure, where the mobility procedure includes: instructing the UE to disconnect from the second node, and instructing the UE to establish a connection with the third node.
The method of claim 4, wherein after setting a specified threshold for triggering the mobility flow, the method further comprising: performing a mobility flow based on the specified threshold, wherein the specified threshold The value includes at least one of the following: a threshold of the number of retransmissions of the data packet, and a signal quality threshold of the wireless interface.
The method of claim 5, wherein performing the mobility flow according to the specified threshold value comprises at least one of the following:

And when the number of times that the second node repeatedly transmits the specified data packet reaches a threshold number of retransmission times of the data packet, instructing the UE to disconnect the second node and establish a connection with the third node;

And when the signal quality of the radio interface between the second node and the UE is lower than a signal quality threshold of the radio interface, or when the data packet of the second node is transmitted, indicating that the UE is disconnected A connection with the second node and establishing a connection with the third node.
The method of claim 5, wherein setting a threshold of the number of retransmissions of the data packet comprises:

When the number of retransmissions of the data packet is counted in the hybrid automatic repeat request HARQ entity, setting the threshold of the number of retransmissions of the data packet to be less than the HARQ retransmission that causes the radio link control RLC entity to perform the automatic retransmission request ARQ mechanism Number of times

When the number of retransmissions of the data packet is counted in the RLC entity, the threshold of the number of retransmissions of the data packet is set to be smaller than the value of the number of ARQ retransmissions that may cause the radio link to fail the RLF.
The method according to claim 5, wherein the user plane architecture mode of the retransmission threshold of the data packet comprises at least one of the following: a secondary cell group bearer user plane architecture mode, and a traffic offload user plane architecture mode.
The method according to claim 8, wherein the threshold of the number of retransmissions of the data packet is set to a shunt-bearing user plane architecture mode in which: a data packet to be transmitted is stored in an RLC buffer area of the second node. .
The method according to claim 8, wherein the method further comprises: in the user plane architecture mode of the offloading bearer, when all the data packets in the RLC buffer area of the second node have been transmitted, pass through the bottom layer The control plane information in the protocol entity indicates that the UE disconnects from the second node and establishes a connection with the third node.
The method according to claim 8, wherein the method further comprises: in the user plane architecture mode of the offloaded bearer, after the data packets have been transmitted before the UE disconnects from the second node In the case that the first node has indicated that data forwarding needs to be performed, the second node replies to the first node with the indication information that the downlink data packet has been successfully sent.
A method for establishing a connection, including:

Receiving specified radio resource configuration information;

And disconnecting from the second node according to the specified radio resource configuration information and establishing a connection with the third node.
The method of claim 12, wherein disconnecting from the second node and establishing a connection with the third node according to the specified radio resource configuration information comprises:

And establishing a specified protocol entity corresponding to the third node according to the specified radio resource configuration information.
The method of claim 12, wherein before the disconnecting from the second node according to the specified radio resource configuration information, the method further comprises at least one of: receiving a retransmission threshold of the data packet, receiving the wireless The signal quality threshold of the interface.
The method of claim 14, wherein disconnecting from the second node and establishing a connection with the third node according to the specified radio resource configuration information comprises at least one of the following:

The UE continues to maintain data transmission with the second node, and performs a mobility procedure when the number of times the designated data packet is transmitted with the second node reaches a threshold number of retransmission times of the data packet;

The UE continues to maintain data transmission with the second node, and performs a mobility procedure when a signal quality of a radio interface with the second node is lower than a signal quality threshold of the radio interface;

The mobility procedure includes: disconnecting from the second node, establishing a connection with the third node.
The method of claim 15, wherein when the mobility flow is to disconnect from the second node, The method also includes transmitting a disconnected information indication to the second node.
A connection establishment system, comprising:

a macro base station MeNB, a UE, a first small station node SeNB1, and a second small station node SeNB2;

The MeNB sends the specified radio resource configuration information to the UE, where the specified radio resource configuration information is set to instruct the UE to disconnect from the first small station node SeNB1 and the second The small station node SeNB2 establishes a connection.
A connection establishing device, comprising:

a receiving module, configured to receive specified radio resource configuration information;

And a processing module, configured to disconnect from the second node according to the specified radio resource configuration information and establish a connection with the third node.
A connection establishing device, comprising:

a sending module, configured to send, by the first node, the specified radio resource configuration information to the user equipment UE, where the specified radio resource configuration information is set to instruct the UE to disconnect from the second node and establish a connection with the third node .
A terminal, comprising a processor and a memory;

The processor is configured to receive the specified radio resource configuration information, and disconnect from the second node according to the specified radio resource configuration information, and establish a connection with the third node;

The memory is configured to be coupled to the processor.
A computer storage medium, wherein the computer storage medium stores computer executable instructions configured to perform the method of any one of claims 1-16.