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WO2017008508A1 - 基于非授权载波执行随机接入的方法及装置 - Google Patents

基于非授权载波执行随机接入的方法及装置 Download PDF

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Publication number
WO2017008508A1
WO2017008508A1 PCT/CN2016/074479 CN2016074479W WO2017008508A1 WO 2017008508 A1 WO2017008508 A1 WO 2017008508A1 CN 2016074479 W CN2016074479 W CN 2016074479W WO 2017008508 A1 WO2017008508 A1 WO 2017008508A1
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WO
WIPO (PCT)
Prior art keywords
random access
terminal
serving cell
base station
secondary serving
Prior art date
Application number
PCT/CN2016/074479
Other languages
English (en)
French (fr)
Inventor
陈中明
Original Assignee
中兴通讯股份有限公司
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Filing date
Publication date
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Publication of WO2017008508A1 publication Critical patent/WO2017008508A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for performing random access based on an unlicensed carrier.
  • the user equipment In the Long Term Evolution (LTE) system, the user equipment (User Equipment, UE for short) in the connected state needs to obtain uplink synchronization and downlink synchronization with the base station before transmitting data to the base station.
  • the uplink synchronization is implemented by performing a random access procedure, in which a Time Advance (TA) is acquired at the same time, and downlink synchronization is implemented by the UE measuring a certain cell, where, TA It is mainly used to let the UE determine the data transmission time.
  • TA Time Advance
  • a random access procedure may be initiated by a base station by sending a physical downlink control channel signaling (PDCCH order) or a medium access control layer (Medium Access). Control, abbreviated as MAC) signaling initiation, as shown in step S1 in FIG.
  • PDCCH order physical downlink control channel signaling
  • MAC medium access control layer
  • RAP dedicated random access preamble
  • RRC radio resource control
  • the dedicated random access preamble can only be allocated by the base station, and the dedicated random access preamble can be configured for the UE by using the PDCCH order or the handover command; when the UE needs to select the random access preamble Then, the random access is a random access of the conflict. In this case, step S1 is not performed, and step S2 is directly executed.
  • the random access resources selected by the UE include: a random access preamble and a time-frequency domain resource of a physical random access channel (Physical Random Access Channel, PRACH for short).
  • PRACH Physical Random Access Channel
  • the conflict resolution process is not solved, but the dedicated random access preamble is allocated to the UE by the network side. Therefore, the processing flow is as shown in FIG. 1, including: steps S1 to S2.
  • the conflicting random access process includes four steps of steps S2 to S5, wherein the functions of steps S4 and S5 are used to resolve conflicts.
  • the UE in the connected state can communicate with the source base station through multiple component carriers (CC).
  • CC component carriers
  • the primary service is also introduced.
  • a primary cell referred to as a Pcell
  • Scell Secondary Cell
  • the uplink can support the Radio Radio Head (RRH) and the retransmission (repeater).
  • RRH Radio Radio Head
  • peerater a time advance TA can not solve the problem, will introduce multiple TA to solve the problem.
  • the serving cell using the same TA is classified into one TA group, the TA group including the Pcell is called PTAG, and the TA group not including the Pcell is called STAG.
  • the timing of performing random access on the Pcell in the PTAG is the same as the timing of performing random access when there is only one TA.
  • There is only one time to perform random access on the STAG that is, the network side notification, that is, only the non-conflicting random connection Into the process.
  • step S1 in FIG. 1 is sent by scheduling the cell
  • step S2 is sent by the relevant Scell
  • step S3 is sent by the Pcell.
  • Unlicensed carrier refers to the spectrum (or carrier) that can be used directly without authorization, subject to the relevant regulations (radio control) of government agencies (eg, National Radio Regulatory Commission). For example, microwave ovens, remote control toy airplanes, wireless mice, wireless keyboards, and Wireless Fidelity (WiFi) use unlicensed carriers. In some cases, unlicensed carriers need to compete to be used. If the base station (including the WiFi access point) does not compete for resources, the unlicensed carrier cannot be used.
  • the unlicensed carrier and the authorized carrier may be used in a carrier aggregation manner or in a dual connectivity manner.
  • the unlicensed carrier is generally used as a supplement to the data transmission, that is, the authorized carrier is used as the primary serving cell, and the unlicensed carrier is used as the secondary serving cell.
  • the present invention provides a method and apparatus for performing random access based on an unlicensed carrier to at least solve the problem in the related art that it is difficult to perform a random access procedure on an unlicensed carrier.
  • a method for performing random access based on an unlicensed carrier including: a terminal receiving base station transmitting a first notification message for indicating that a random access procedure is performed in a secondary serving cell, and Obtaining a resource to the secondary serving cell, where the secondary serving cell is a cell based on the unlicensed carrier; the terminal sending a random access preamble to the base station on the acquired resource; the terminal Receiving, by the receiving window, a random access response RAR message sent by the base station; when the random access preamble carried in the RAR message is consistent with the random access preamble sent by the terminal to the base station, the terminal is in the The random access procedure on the secondary serving cell ends normally.
  • the acquiring, by the terminal, the resource of the auxiliary serving cell includes: receiving, by the terminal, a second notification message of the base station, where the second notification message carries the base station in the auxiliary serving cell a resource that is contending; or the terminal receives a request message sent by the base station for contending for resources in the secondary serving cell, and contends for resources of the secondary serving cell according to the request message, and will compete to The resource informs the base station.
  • the method before the terminal receiving the base station sends a first notification message for indicating that the random access procedure is performed in the secondary serving cell, includes: the terminal receiving a third notification message sent by the base station, where The third notification message carries one or more random access preambles reserved by the base station for the secondary serving cell.
  • the sending, by the terminal, the random access preamble to the base station on the acquired resource the terminal receiving the first notification message sent by the base station, where the first notification message carries a random access preamble in the random access preamble; the terminal determines, according to the random access preamble, a cell that needs to perform a random access procedure, and if the determined cell is the auxiliary serving cell, The first subframe of the resource that the secondary serving cell competes with Sending the random access preamble.
  • the sending, by the terminal, the random access preamble to the base station on the acquired resource includes: when the first subframe is an incomplete subframe, the terminal delays transmitting the random connection in one subframe. Entering a preamble; or, when the secondary serving cell on the unlicensed carrier contends to the first subframe of the resource and does not receive the first notification message sent by the base station, or on the unlicensed carrier When the secondary serving cell competes to the first subframe of the resource and also receives the first notification message sent by the base station, the terminal sends the random in the next subframe after receiving the first notification message. Access the preamble.
  • the method further includes: when the resource of the auxiliary serving cell is exhausted, the terminal suspends receiving The window changes until it again competes for resources of the secondary serving cell.
  • the method further includes: after the obtained resource of the secondary serving cell is exhausted and the obtained resource is not acquired again When the terminal fails to receive the response message again, the terminal does not adjust the transmission power when retransmitting the random access preamble.
  • a method for managing a random access based on an unlicensed carrier includes: the base station transmitting, to the terminal, a first notification message indicating that a random access procedure is performed in the secondary serving cell,
  • the first notification message carries an identifier for indicating the secondary serving cell, the secondary serving cell is a cell based on the unlicensed carrier, and the base station acquires resources of the secondary serving cell, and the Sending the resource to the terminal, where the resource is used by the terminal to send a random access preamble;
  • the base station sends a random access response RAR message to the terminal, where the RAR message carries a random connection Enter the preamble.
  • an apparatus for performing random access based on an unlicensed carrier which is applied to a terminal side, and includes: a first processing module, configured to be sent by the receiving base station to indicate in the auxiliary serving cell Performing a first notification message of the random access procedure, and acquiring resources of the secondary serving cell, where the secondary serving cell is a cell based on the unlicensed carrier; and the first sending module is configured to be obtained Sending a random access preamble to the base station on the resource; the receiving module is configured to receive the random access response RAR message sent by the base station by using an open receiving window, and the executing module is configured to perform random access carried in the RAR message When the preamble is consistent with the random access preamble sent by the terminal to the base station, the random access procedure performed on the secondary serving cell ends normally.
  • a terminal for performing random access based on an unlicensed carrier is provided, and is used by a base station, and includes: a second sending module, configured to send, to the terminal, the indication, in the auxiliary serving cell a first notification message of the random access procedure, where the first notification message carries an identifier for indicating the secondary serving cell, the secondary serving cell is a cell based on the unlicensed carrier, and a second processing module, And the third transmission module is configured to send to the terminal, where the resource is sent to the terminal, where the resource is sent to the terminal, where the resource is used by the terminal to send a random access preamble; And sending a random access response RAR message, where the RAR message carries a random access preamble.
  • the terminal receiving base station sends a first notification message for indicating that the random access procedure is performed in the secondary serving cell, and acquires resources of the secondary serving cell, where the secondary serving cell is an unlicensed carrier.
  • the resource is a resource used by the terminal to send a random access preamble.
  • the terminal receives the RAR message of the base station, and the random access preamble carried in the RAR message and the random number sent by the terminal.
  • the access preambles are consistent, the random access procedure of the terminal on the secondary serving cell ends normally; the problem of the difficulty in performing the random access procedure on the unlicensed carrier in the related art is solved by the present invention.
  • FIG. 1 is a schematic diagram of a random access procedure in an LTE system in the related art
  • FIG. 2 is a flowchart 1 of a method for performing random access based on an unlicensed carrier according to an embodiment of the present invention
  • FIG. 3 is a second flowchart of a method for performing random access based on an unlicensed carrier according to an embodiment of the present invention
  • FIG. 4 is a structural block diagram 1 of an apparatus for performing random access based on an unlicensed carrier according to an embodiment of the present invention
  • FIG. 5 is a block diagram 1 of an optional structure of an apparatus for performing random access based on an unlicensed carrier according to an embodiment of the present invention
  • FIG. 6 is a block diagram 2 of an optional structure of an apparatus for performing random access based on an unlicensed carrier according to an embodiment of the present invention
  • FIG. 7 is a block diagram 3 of an optional structure of an apparatus for performing random access based on an unlicensed carrier according to an embodiment of the present invention
  • FIG. 8 is a block diagram 4 of an optional structure of an apparatus for performing random access based on an unlicensed carrier according to an embodiment of the present invention
  • FIG. 9 is a structural block diagram 2 of an apparatus for performing random access based on an unlicensed carrier according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of a method according to an alternative embodiment 1 of the present invention.
  • FIG. 11 is a flow chart of a method in accordance with an alternative embodiment 2 of the present invention.
  • FIG. 2 is a flowchart 1 of a method for performing random access based on an unlicensed carrier according to an embodiment of the present invention. The process includes the following steps:
  • Step S202 The terminal receiving base station sends a first notification message for indicating that the random access procedure is performed in the secondary serving cell, and acquires resources of the secondary serving cell, where the secondary serving cell is a cell based on the unlicensed carrier;
  • Step S204 The terminal sends a random access preamble to the base station according to the identifier on the acquired resource.
  • Step S206 The terminal opens the receiving window to receive a random access response RAR message sent by the base station.
  • Step S208 When the random access preamble carried in the RAR message is consistent with the random access preamble sent by the terminal to the base station, the random access procedure of the terminal on the secondary serving cell ends normally.
  • the terminal receiving base station sends a first notification message for indicating that the random access procedure is performed in the secondary serving cell, and acquires resources of the secondary serving cell, and the secondary serving cell is unauthorized.
  • a cell of the carrier the resource is a resource used by the terminal to send a random access preamble, and after the random access preamble is sent to the base station, the terminal receives the RAR message of the base station, and the random access preamble carried in the RAR message
  • the random access procedure of the terminal on the secondary serving cell is normally ended.
  • the base station involved in the embodiment has the auxiliary serving cell is that, due to the increase of the traffic volume, the base station adds the auxiliary serving cell to the terminal according to the reporting report reported by the terminal, and the terminal is The primary serving cell of the base station is connected.
  • the method may be implemented as follows:
  • Manner 1 The terminal receives the second notification message of the base station, where the second notification message carries the resources that the base station competes in the auxiliary serving cell.
  • Manner 2 The terminal receives the request message sent by the base station for competing for the resource in the secondary serving cell, and contends the resource of the secondary serving cell according to the request message, and notifies the base station of the contending resource.
  • the manner in which the terminal can acquire the resource may be that the base station advertises the resource to the terminal, and the terminal may contend for the resource of the auxiliary serving cell, that is, the terminal may actively contend for the resource. It may also be a passively accepting resource that the base station competes for, and the resource may be frequency information of the resource, time information, and the like.
  • the manner in which the terminal involved in the step S204 sends the random access preamble on the acquired resource according to the identifier may be implemented in the following manner:
  • Manner 3 The terminal receives the first notification message sent by the base station by using the primary serving cell, where the first notification message carries the identifier of the secondary serving cell and the random access preamble; the terminal is located on the corresponding secondary serving cell according to the identifier.
  • the random access preamble is transmitted on the first subframe that competes with the resource.
  • the method includes: receiving, by the terminal, a third notification message sent by the base station, where the third notification message carries the base station One or more random access preambles reserved for the secondary serving cell.
  • the terminal sends the random access preamble to the base station on the acquired resource, where the terminal receives the first notification message sent by the base station, where the first notification message carries a random access preamble; the terminal determines according to the random access preamble.
  • a cell that needs to perform a random access procedure if the determined cell is a secondary serving cell, sends a random access preamble on the first subframe of the resource that the secondary serving cell contends.
  • the random access preamble obtained by the terminal in the third manner may be that the base station sends a notification message, and the message carries a random access preamble and matches the random access preamble.
  • the auxiliary serving cell identifier in the fourth method, the random access preamble reserved by the base station to the auxiliary serving cell in advance, so that the terminal obtains the auxiliary corresponding to the random access preamble when receiving the random access preamble Service area.
  • the terminal sends a random access preamble on the first subframe that contends for the resource, in the manner that the two methods in the foregoing manners and the fourth method are used to send the random access preamble.
  • the random access preamble is not sent by using the first subframe, and the application scenario of the mode may include:
  • Scenario 1 When the first subframe is an incomplete subframe, the terminal sends a random access preamble after delaying one subframe.
  • Scenario 2 When competing to the first subframe of the resource and not receiving the first notification message sent by the base station, or when competing to the first subframe of the resource and simultaneously receiving the first notification message sent by the base station The terminal sends a random access preamble in the next subframe after receiving the first notification message.
  • the response message involved in the embodiment may further carry the timing advance TA of the random preamble calculated by the base station. Therefore, after the terminal in the step S206 in the embodiment is normal, the random access process on the secondary serving cell ends normally. The terminal transmits data on the secondary serving cell according to the TA.
  • the method of this embodiment further includes: after the terminal accessing the receiving window receives the base station in response to the random access preamble response message, the method further includes: when the resource of the auxiliary serving cell acquired by the terminal is exhausted, the terminal is suspended. The change in the receive window until the content of the secondary serving cell is again contending.
  • the terminal may open the receiving window in the third subframe after the random access preamble is sent, and the window size may be configured, for example, the current configuration is 8 subframes, that is, the window size. It is 8 subframes.
  • the window is opened, the competing resources have been used, and the terminal stops the window from increasing, and is fixed in the length of 3 subframes.
  • the method of this embodiment further includes: after the terminal accesses the resources of the auxiliary serving cell and does not acquire the resource again, after the terminal completes the random access process on the secondary serving cell.
  • the terminal fails to receive the response message again, the terminal resends the random access preamble and does not adjust the transmission power.
  • the terminal may open the receiving window in the third subframe after the random access preamble is sent, and the window size may be configured, for example, the current configuration is 8 subframes.
  • the window After the window is opened, the competing resources have been used, the window continues to open, and the RAR is not received until the end of the window, and no competition resource information is received, or there is no competition for resources.
  • the terminal resends the random access preamble and transmits according to the power of the last random access preamble, without increasing the transmission power.
  • FIG. 3 is a second flowchart of a method for performing random access based on an unlicensed carrier according to an embodiment of the present invention. As shown in FIG. 3, the steps of the method include:
  • Step S302 The base station sends a first notification message to the terminal to indicate that the random access procedure is performed in the secondary serving cell, where the first notification message carries an identifier for indicating the secondary serving cell, and the secondary serving cell is based on the non-granting a cell of a weight carrier;
  • Step S304 The base station acquires the resource of the secondary serving cell, and sends the resource to the terminal, where the resource is used by the terminal to send the random access preamble;
  • Step S306 The base station sends a random access response RAR message to the terminal, where the RAR message carries a random access preamble.
  • the random access preamble carried in the RAR message in step S306 is used to match the random access preamble sent by the terminal, that is, the random carried in the RAR message in step S208 of the embodiment of FIG.
  • the random access procedure of the terminal on the secondary serving cell ends normally; that is, the random access preamble carried in the RAR message may be randomly connected with the terminal.
  • the preambles are consistent and may be inconsistent.
  • FIG. 2 and FIG. 3 describe the present invention from the base station side and the terminal side, respectively. Therefore, the above two embodiments are corresponding, and have been described in detail in the embodiment of FIG. 2, The embodiment of FIG. 3 will not be described again herein.
  • the description on the terminal side reference may be made to the description on the terminal side.
  • 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.
  • 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.
  • an apparatus for performing random access based on an unlicensed carrier is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • 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.
  • the apparatus includes: a first processing module 42 configured to receive The base station sends a first notification message for indicating that the random access procedure is performed in the secondary serving cell, and acquires the resource of the secondary serving cell, where the first notification message carries an identifier for indicating the secondary serving cell, and the secondary serving cell
  • the first receiving module 44 is coupled to the first processing module 42 and configured to send a random access preamble on the acquired resource according to the identifier; the first receiving module 46, and the first sending The module 44 is coupled to the receiving window to receive the random access response RAR message sent by the base station.
  • the executing module 48 is coupled to the first receiving module 46 and configured to be a random access preamble and a terminal to be carried in the RAR message.
  • the executing module 48 is coupled to the first receiving module 46 and configured to be a random access preamble and a terminal to be carried in the RAR message.
  • FIG. 5 is a block diagram of an optional structure of an apparatus for performing random access based on an unlicensed carrier according to an embodiment of the present invention.
  • the first processing module 42 includes: a first receiving unit 52 configured to receive a base station. a second notification message, wherein The second notification message carries the resource that the base station contends in the secondary serving cell; or the second receiving unit 54 is configured to receive the request message sent by the base station for competing for the resource in the secondary serving cell; the contention unit 56 is set as the basis The request message contends for resources of the secondary serving cell, and notifies the base station of the contending resources.
  • FIG. 6 is a block diagram of an optional structure of an apparatus for performing random access based on an unlicensed carrier according to an embodiment of the present invention.
  • the first sending module 44 includes: a third receiving unit 62 configured to receive a base station. a first notification message sent by the primary serving cell of the secondary serving cell, where the first notification message carries the identifier of the secondary serving cell and the random access preamble; the first sending unit 64 is coupled to the third receiving unit 62. And sending, according to the identifier, the random access preamble on the first subframe that contends for the resource on the corresponding secondary serving cell;
  • FIG. 7 is a block diagram 3 of an optional structure of an apparatus for performing random access based on an unlicensed carrier according to an embodiment of the present invention. As shown in FIG. 7, the terminal receiving base station transmits a procedure for indicating that a random access procedure is performed in the secondary serving cell.
  • the method of the embodiment further includes: the second receiving module 72 is coupled to the first processing module 42 and configured to receive a third notification message sent by the receiving base station, where the third notification message carries One or more random access preambles reserved by the base station for the secondary serving cell;
  • the first sending module 44 includes: a fourth receiving unit 74, configured to receive a first notification message sent by the base station by using the primary serving cell, where A notification message carries a random access preamble of the plurality of random access preambles reserved by the base station for the secondary serving cell;
  • the second sending unit 76 is coupled to the fourth receiving unit 74 and is configured to be connected according to the random access.
  • the preamble determines the cell that needs to perform the random access procedure, and if the determined cell is the secondary serving cell, the resources that are competed in the secondary serving cell Transmitting a random access preamble on a sub-frame.
  • FIG. 8 is a block diagram of an optional structure of an apparatus for performing random access based on an unlicensed carrier according to an embodiment of the present invention.
  • the first sending module 44 includes: a third sending unit 82, configured to be in the first When the subframe is an incomplete subframe, the random access preamble is sent after one subframe is delayed; or the fourth sending unit 84 is configured to contend for the first subframe of the resource and not received by the primary serving cell.
  • the first notification message is received, or when the terminal contends to the first subframe of the resource and also receives the first notification message sent by the primary serving cell, the next subframe after the first notification message is received is randomly sent. Access the preamble.
  • the apparatus of the embodiment further includes: when the resource of the auxiliary serving cell acquired by the terminal is exhausted, the module is suspended, and is set to be suspended. The change in the receive window until the content of the secondary serving cell is again contending.
  • the apparatus in this embodiment further includes: after the resource of the obtained secondary serving cell is exhausted and the resource is not acquired again, the terminal fails to be used again.
  • the processing module is configured to resend the random access preamble and not adjust the transmit power.
  • the response message involved in the embodiment further carries the timing advance TA of the random preamble calculated by the base station; therefore, the executing module 38 is further configured to perform a random access procedure on the secondary serving cell according to the TA.
  • FIG. 9 is a structural block diagram 2 of an apparatus for performing random access based on an unlicensed carrier according to an embodiment of the present invention.
  • the apparatus is applied to a base station side.
  • the apparatus includes: a second sending module 92, configured to The terminal sends a first notification message for indicating that the random access procedure is performed in the secondary serving cell, where the first notification message carries an identifier for indicating the secondary serving cell, and the secondary serving cell is a cell based on the unlicensed carrier;
  • Second processing module 94 with the second hair
  • the sending module 92 is coupled and configured to acquire the resources of the auxiliary serving cell, and send the resource to the terminal, where the resource is used by the terminal to send the random access preamble, and the third sending module 96 is coupled to the second processing module 94. And sending a response message in response to the random access preamble to the terminal, where the response message carries a random access preamble.
  • the optional implementation example provides a method for performing random access by using an unlicensed carrier, and the steps of the method include:
  • Step S402 The base station notifies the terminal to initiate a random access procedure on the Licensed Assisted Access (LAA).
  • LAA Licensed Assisted Access
  • the LAA is a self-scheduled cell.
  • the LAG order is sent on an authorized carrier, such as a Pcell, to trigger a random access procedure on the LAA, and the cell identifier is added on the PDCCH order or the dedicated preamble segment is used to distinguish the request to initiate a random on the Pcell.
  • the access procedure is also initiated by the random access procedure on the LAA.
  • Step S404 After receiving the PDCCH order, the terminal sends a random access preamble.
  • the LAA After the LAA preempts the resource, the LAA is fixed in the first subframe random access preamble of the preempted resource. If the first subframe is an incomplete subframe, the subframe may be delayed by one subframe to send a random access preamble. Code, or no delay.
  • Step S406 The terminal receives the RAR sent by the base station
  • the RAR receiving window (PA Response window) pauses the change of the window when there is no competition for the unlicensed carrier resource, and waits until the resource is competed. If the RAR is not received because the resource is not preempted, the terminal does not adjust the power when retransmitting the random access preamble.
  • the LAA can quickly complete random access and perform data transmission and reception, thereby avoiding the situation that the LAA cannot be used.
  • the base station has two cells, cell 1 (authorized carrier, that is, primary serving cell), cell 3 (unlicensed carrier, that is, auxiliary serving cell), and cell 1 and cell 3 can perform carrier aggregation. .
  • cell 1 and cell 3 can be aggregated by means of dual connectivity, if the cell on the unlicensed carrier is activated and deactivated, the cell needs to be activated before performing the random access procedure.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 10 is a flowchart of a method according to an alternative embodiment of the present invention.
  • a terminal establishes a connection with a cell 1.
  • the base station sends a measurement task to the terminal, and receives a measurement report reported by the terminal.
  • Step S1002 The base station adds the cell 3 to the terminal according to the measurement report, and the cell 3 is a self-scheduling cell according to the measurement report.
  • Step S1004 The terminal receives the configuration command, and adds the cell 3;
  • Step S1006a The base station notifies the terminal that the cell 3 needs to perform a random access procedure, and sends a PDCCH through the cell 1.
  • the order notification terminal in the PDCCH order, carries the identifier of the cell 3, which may be a cell identifier or a serving cell identifier or other indication method indicating the cell 3, and may also carry a dedicated preamble index when it is 60;
  • Step S1006b The base station contends for the resources on the cell 3, and after competing for the resources, notifies the terminal, the information of the competing resources, such as the frequency information of the competing resources, the time information, and the like;
  • step S806a and the step S806b can be performed simultaneously.
  • Step S1008 The terminal acquires a resource that competes
  • Step S1010 The terminal receives the command on the cell 1, and decodes the cell identifier.
  • the cell 3 knows that the random access procedure is required to be initiated on the cell 3, and the random access preamble corresponding to the dedicated preamble index 60 is used, and the base station is received.
  • the information of the competing resources is sent in the first subframe that competes to the resource to transmit the random access preamble.
  • the terminal may Delaying the transmission of the random access preamble in one subframe may also be delayed.
  • the terminal After receiving the contending resource information sent by the base station, if the first subframe of the contending resource, the terminal has not received the PDCCH order on the cell 1, or is in the first subframe of the contending resource
  • the random access preamble is sent in the next subframe of the PDCCH order received on the cell 1, that is, the PDCCH order is received on the cell 1, and the decoding is successful, and the random access needs to be sent.
  • the cell 3 is searched for the start position of the new subframe, and the random access preamble is sent when the subframe is found.
  • Step S1012 After the terminal sends the random access preamble, the third subframe opens the receiving window, and the window size is configurable, for example, the current configuration is 8 subframes.
  • Step S1014 The base station receives the preamble, calculates the TA value, and sends the RAR notification terminal through the cell 1.
  • Step S1016 The terminal receives the random access response sent by the base station, and confirms that the preamble in the response message is the same as the previously transmitted preamble, and the random access process is completed, and the TA of the random access response is obtained;
  • Step S1018 The terminal can perform uplink data transmission in the cell 3 by using the TA.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • Figure 11 is a flowchart of a method according to an alternative embodiment of the present invention.
  • the terminal establishes a connection with the cell 1, and the base station sends a measurement task to the terminal, and receives the measurement report reported by the terminal.
  • the base station sends a measurement task to the terminal, and receives the measurement report reported by the terminal.
  • Step S1102 The base station adds the cell 3 to the terminal according to the measurement report, and the cell 3 is a self-scheduling cell.
  • Step S1104 The terminal receives the configuration command, and adds the cell 3;
  • Step S1106a In the random access dedicated preamble resource of the base station, the index 60-63 is reserved for the LAA cell, that is, the base station sends a dedicated preamble index of 60-63, and the terminal considers that the cell on the LAA should initiate random access.
  • Base station The system broadcasts the broadcast message or the dedicated message to inform the terminal.
  • the base station notifies the terminal that the cell 3 needs to perform a random access procedure, and the PDCCH order is notified by the cell 1 to notify the terminal, and the dedicated preamble index is carried in the PDCCH order is 60;
  • Step S1106b The terminal receives the request of the base station, contends the resources on the cell 3, and after competing for the resource, notifies the base station, the information of the contention of the competition, such as the frequency information of the competing resource, the time information, and the like;
  • step S1006a and step S1006b can be performed simultaneously.
  • Step S1108 the terminal acquires the resource information of the competition
  • Step S1110 The terminal receives the command on the cell 1 and decodes the random access preamble corresponding to the dedicated preamble index 60. It is learned that the random access procedure is required to be initiated on the cell 3, and the first subframe is sent to compete for the resource. The random access preamble.
  • the terminal may Delaying the transmission of the random access preamble in one subframe may also be delayed.
  • Step S1112 After the terminal sends the random access preamble, the third subframe opens the receiving window, and the window size is configurable, for example, the current configuration is 8 subframes.
  • Step S1114 The base station receives the preamble, calculates the TA value, and sends the RAR notification terminal through the cell 3.
  • Step S1116 The terminal receives the random access response sent by the base station, and confirms that the preamble in the response message is the same as the previously transmitted preamble, and the random access process is completed, and the TA of the random access response is obtained;
  • Step S1118 The terminal can perform uplink data transmission in the cell 3 by using the TA.
  • the terminal selects one cell to perform a random access procedure.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • Steps S1202 to S1208 in this embodiment are similar to steps S1102 to S1108 in the second embodiment, except that the following steps are performed;
  • step S1210 the terminal opens the receiving window in the third subframe after the random access preamble is sent, and the window size is configurable.
  • the current configuration is 8 subframes, that is, the window size is 8 subframes.
  • Step S1212 After the window is opened, the three sub-frames are used, and the competing resources have been used, and the terminal stops the window from increasing, and is fixed in the length of 3 subframes.
  • Step S1214 After receiving the subframes, the terminal receives the contending resource information sent by the base station again, or the terminal competes on its own. To the resource, at the beginning of the first sub-frame of the competing resource, the window continues to open, that is, after 4 sub-frames, the 5th sub-frame, the window size becomes 4 sub-frames, if the first sub-frame is incomplete Subframes, the terminal can delay the opening of a window by one subframe, or it can be delayed.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • Steps S1302 to S1308 in this embodiment are similar to steps S1102 to S1108 in the second embodiment, except that the following steps are performed;
  • Step S1310 After the terminal sends the random access preamble, the terminal opens the receiving window in a third subframe, and the window size is configurable, for example, the current configuration is 8 subframes.
  • Step S1312 After the window is opened, the competing resources have been used, the window continues to be opened, and the RAR is not received until the end of the window, and no competition resource information is received, or no resources are competed.
  • Step S1314 The terminal resends the random access preamble and transmits according to the power of the last time the random access preamble is transmitted, without increasing the transmission power.
  • each of the above modules may be implemented by software or hardware.
  • 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.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • Step S1 The terminal receiving base station sends a first notification message for indicating that a random access procedure is performed in the secondary serving cell, and acquires resources of the secondary serving cell, where the secondary serving cell is a cell based on the unlicensed carrier;
  • Step S2 The terminal sends a random access preamble on the acquired resource according to the identifier.
  • Step S3 The terminal opens the receiving window to receive a random access response RAR message sent by the base station.
  • Step S4 When the random access preamble carried in the RAR message is consistent with the random access preamble sent by the terminal, the random access procedure of the terminal on the secondary serving cell ends normally.
  • 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.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the terminal receiving base station sends a first notification message for indicating that the random access procedure is performed in the secondary serving cell, and acquires resources of the secondary serving cell, where the secondary serving cell is an unlicensed carrier.
  • the resource is a resource used by the terminal to send a random access preamble.
  • the terminal receives the RAR message of the base station, and the random access preamble carried in the RAR message is sent by the terminal.
  • the random access preambles are consistent, the random access procedure of the terminal on the secondary serving cell ends normally; the problem of the difficulty in performing the random access procedure on the unlicensed carrier in the related art is solved by the present invention.

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Abstract

本发明提供了一种基于非授权载波执行随机接入的方法及装置，其中该方法包括：终端接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，并获取到辅助服务小区的资源，其中，辅助服务小区为基于非授权载波的小区；终端在获取到的资源上向基站发送随机接入前导码；终端打开接收窗口接收基站发送的随机接入响应RAR消息；在RAR消息中携带的随机接入前导码与终端发送的随机接入前导码一致时，终端在辅助服务小区上随机接入过程正常结束。通过本发明，解决了相关技术中难以在非授权载波上执行随机接入过程的问题，填补了相关技术中的空白。

Description

基于非授权载波执行随机接入的方法及装置 技术领域
本发明涉及通信领域，具体而言，涉及一种基于非授权载波执行随机接入的方法及装置。
背景技术
长期演进(Long Term Evolution，简称为LTE)系统中，处于连接状态的用户设备(User Equipment，简称为UE)向基站发送数据前，需要获得与基站的上行同步和下行同步。这里，上行同步是通过执行随机接入过程来实现的，其中，同时获取到发送时间提前量(Time Advance，简称为TA)，下行同步通过UE对某个小区进行测量来实现的，其中，TA主要用于让UE确定数据发送时刻。
图1是相关技术中LTE系统中随机接入流程示意图，如图1所示，随机接入过程可以由基站通过发送物理下行控制信道信令(PDCCH order)发起或者媒体接入控制层(Medium Access Control，简称为MAC)信令发起，如图1中的步骤S1。当可以利用PDCCH order或者无线资源控制(Radio Resource Control，简称为RRC)信令为UE分配专用随机接入前导(Random Access Preamble，简称为RAP)码时，则随机接入称为非冲突的随机接入，在这种情况下，专用随机接入前导码只能由基站来分配，可以通过PDCCH order或者切换命令来为UE配置专用随机接入前导码；当UE需要选择随机接入前导码时，则随机接入为冲突的随机接入，在这种情况下，不执行步骤S1，直接执行步骤S2。
UE选择的随机接入资源包括：选择随机接入前导码和物理随机接入信道(Physical Random Access Channel，简称为PRACH)的时频域资源等。对于非冲突的随机接入，没有解决冲突的解决过程，而是通过网络侧分配专用随机接入前导码给UE来实现的，因此，处理流程如图1所示，包括：步骤S1～S2两个步骤；冲突的随机接入过程如图1所示，包括：步骤S2～S5四个步骤，其中，步骤S4和S5的作用是用来解决冲突的。
引入载波聚合技术(Carrier Aggregation，简称为CA)后，处于连接状态的UE可以同时通过多个分量载波(Component Carriers，简称为CC)与源基站进行通信，引入CA技术后，还引入了主服务小区(Primary Cell，简称为Pcell)和辅服务小区(Secondary Cell，简称为Scell)。由于数据量的提升，Scell的个数会增多，比如增加到四个，相应地，应用条件也会放宽，比如上行可以支持射频拉远头(Remote Radio Head，简称为RRH)和重传(repeater)技术，一个时间提前量TA不能解决问题，会引入多个TA来解决问题。为了方便管理，使用相同TA的服务小区归入一个TA组，包含Pcell的TA组称为PTAG，没有包含Pcell的TA组称为STAG。UE在PTAG中的Pcell上执行随机接入的时机跟只有一个TA时执行随机接入的时机一样，在STAG上执行随机接入的时机只有一个，就是网络侧通知，即只有非冲突的随机接入过程。STAG上的随机接入过程中，图1中的步骤S1通过调度小区来发送，步骤S2通过相关的Scell来发送，步骤S3通过Pcell发。
随着数据业务的快速增长，在不久的将来，授权频谱将不能承受如此巨大的数据量；所以LTE运营商考虑在非授权频谱资源(Unlicensed Carrier)中部署LTE，通过非授权频谱来分担授权载波中的数据流量。非授权载波(免授权频谱)是指在满足政府部门(如，国家无线电管理委员会)有关规定(无线电管制)下，不需要授权就能直接使用的频谱(或载波)。例如，微波炉、遥控玩具飞机、无线鼠标、无线键盘、高保真无线上网(Wireless Fidelity，简称为WiFi)等都使用了非授权载波。在有的情况下，非授权载波需要通过竞争才能使用。如果基站(包括WiFi接入点)没有竞争到资源，则不能使用非授权载波。非授权载波和授权载波可以通过载波聚合的方式使用，也可以通过双连接的方式使用，非授权载波一般作为数据传输的补充，即授权载波作为主服务小区，非授权载波作为辅服务小区。
针对相关技术中难以在非授权载波上执行随机接入过程的问题，尚未有有效的解决方案。
发明内容
本发明提供了一种基于非授权载波执行随机接入的方法及装置，以至少解决相关技术中难以在非授权载波上执行随机接入过程的问题。
根据本发明实施例的一个方面，提供了一种基于非授权载波执行随机接入的方法，包括：终端接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，并获取到所述辅助服务小区的资源，其中，所述辅助服务小区为基于所述非授权载波的小区；所述终端在获取到的资源上向所述基站发送随机接入前导码；所述终端打开接收窗口接收所述基站发送的随机接入响应RAR消息；在所述RAR消息中携带的随机接入前导码与所述终端向基站发送的随机接入前导码一致时，所述终端在所述辅助服务小区上随机接入过程正常结束。
可选地，所述终端获取到所述辅助服务小区的资源包括：所述终端接收所述基站的第二通知消息，其中，所述第二通知消息中携带所述基站在所述辅助服务小区中竞争到的资源；或，所述终端接收所述基站发送的用于在所述辅助服务小区竞争资源的请求消息，并依据所述请求消息竞争所述辅助服务小区的资源，且将竞争到的资源通知所述基站。
可选地，所述终端在获取到的资源上向所述基站发送随机接入前导码包括：所述终端接收所述基站发送的所述第一通知消息，其中，所述第一通知消息中携带有所述辅助服务小区的标识和所述随机接入前导码；所述终端依据所述标识在对应的辅助服务小区上竞争到资源的第一子帧上发送所述随机接入前导码。
可选地，在终端接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息之前，所述包括：所述终端接收所述基站发送的第三通知消息，其中，所述第三通知消息中携带有所述基站为辅助服务小区预留的一个或多个随机接入前导码。
可选地，所述终端在获取到的资源上向基站发送随机接入前导码包括：所述终端接收所述基站发送的所述第一通知消息，其中，所述第一通知消息中携带有所述随机接入前导码中的随机接入前导码；所述终端根据所述随机接入前导码确定需要执行随机接入过程的小区，如果确定的小区为所述辅助服务小区，则在所述辅助服务小区竞争到的资源的第一子帧上发 送所述随机接入前导码。
可选地，所述终端在获取到的资源上向基站发送随机接入前导码包括：在所述第一子帧是不完全子帧时，所述终端延后一个子帧发送所述随机接入前导码；或，在所述非授权载波上的辅助服务小区竞争到资源的第一子帧且未收到所述基站发送的第一通知消息时，或，在所述非授权载波上的辅助服务小区竞争到资源的第一个子帧且同时也收到所述基站发送的第一通知消息时，所述终端在接收到所述第一通知消息后的下一个子帧发送所述随机接入前导码。
可选地，在所述终端打开接收窗口接收所述基站发送的随机接入响应RAR消息之后，所述方法还包括；在所述辅助服务小区的资源用尽时，所述终端暂停所述接收窗口的变化，直到再次竞争到所述辅助服务小区的资源。
可选地，在所述终端在所述辅助服务小区上随机接入过程正常结束之后，所述方法还包括；在因为获取到的所述辅助服务小区的资源用尽且未再次获取到所述资源，所述终端未能再次收到所述响应消息时，所述终端重新发送所述随机接入前导码时不调整发送功率。
根据本发明实施例的另一个方面，提供管理一种基于非授权载波执行随机接入的方法，包括：基站向终端发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，其中，第一通知消息中携带有用于指示所述辅助服务小区的标识，所述辅助服务小区为基于所述非授权载波的小区；所述基站获取所述辅助服务小区的资源，并将所述资源发送到所述终端，其中，所述资源用于所述终端发送随机接入前导码；所述基站向所述终端发送随机接入响应RAR消息，其中，所述RAR消息中携带有随机接入前导码。
根据本发明实施例的再一个方面，提供了一种基于非授权载波执行随机接入的装置，应用于终端侧，包括：第一处理模块，设置为接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，并获取到所述辅助服务小区的资源，其中，所述辅助服务小区为基于所述非授权载波的小区；第一发送模块，设置为在获取到的资源上向所述基站发送随机接入前导码；接收模块，设置为打开接收窗口接收所述基站发送的随机接入响应RAR消息；执行模块，设置为在所述RAR消息中携带的随机接入前导码与所述终端向基站发送的随机接入前导码一致时，在所述辅助服务小区上执行的随机接入过程正常结束。
根据本发明实施例的再一个方面，提供了一种基于非授权载波执行随机接入的终端，用于基站侧，包括：第二发送模块，设置为向终端发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，其中，第一通知消息中携带有用于指示所述辅助服务小区的标识，所述辅助服务小区为基于所述非授权载波的小区；第二处理模块，设置为获取所述辅助服务小区的资源，并将所述资源发送到所述终端，其中，所述资源用于所述终端发送随机接入前导码；第三发送模块，设置为向所述终端发送随机接入响应RAR消息，其中，所述RAR消息中携带有随机接入前导码。
在本发明实施例中，终端接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，并获取到辅助服务小区的资源，而该辅助服务小区是非授权载波的小区，该 资源是终端用于发送随机接入前导码的资源，在将随机接入前导码发送基站后，该终端接收该基站的RAR消息，在RAR消息中携带的随机接入前导码与终端发送的随机接入前导码一致时，终端在辅助服务小区上随机接入过程正常结束；通过本发明解决了相关技术中难以在非授权载波上执行随机接入过程的问题。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是相关技术中LTE系统中随机接入流程示意图；
图2是根据本发明实施例的基于非授权载波执行随机接入的方法流程图一；
图3是根据本发明实施例的基于非授权载波执行随机接入的方法流程图二；
图4是根据本发明实施例的基于非授权载波执行随机接入的装置的结构框图一；
图5是根据本发明实施例的基于非授权载波执行随机接入的装置的可选结构框图一；
图6是根据本发明实施例的基于非授权载波执行随机接入的装置的可选结构框图二；
图7是根据本发明实施例的基于非授权载波执行随机接入的装置的可选结构框图三；
图8是根据本发明实施例的基于非授权载波执行随机接入的装置的可选结构框图四；
图9是根据本发明实施例的基于非授权载波执行随机接入的装置的结构框图二；
图10是根据本发明可选实施例一的方法流程图；
图11是根据本发明可选实施例二的方法流程图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
在本实施例中提供了一种基于非授权载波执行随机接入的方法，图2是根据本发明实施例的基于非授权载波执行随机接入的方法流程图一，如图2所示，该流程包括如下步骤：
步骤S202：终端接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，并获取到辅助服务小区的资源，其中，辅助服务小区为基于非授权载波的小区；
步骤S204：终端依据标识在获取到的资源上向基站发送随机接入前导码；
步骤S206：终端打开接收窗口接收基站发送的随机接入响应RAR消息；
步骤S208：在RAR消息中携带的随机接入前导码与终端向基站发送的随机接入前导码一致时，终端在辅助服务小区上随机接入过程正常结束。
通过本实施例的步骤S202至步骤S208，终端接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，并获取到辅助服务小区的资源，而该辅助服务小区是非授权载波的小区，该资源是终端用于发送随机接入前导码的资源，在将随机接入前导码发送基站后，该终端接收该基站的RAR消息，在RAR消息中携带的随机接入前导码与终端发送的随机接入前导码一致时，终端在辅助服务小区上随机接入过程正常结束；通过本实施例解决了相关技术中难以在非授权载波上执行随机接入过程的问题，填补了相关技术中的空白。
需要说明的是，本实施例中涉及到的基站有辅助服务小区的原因之一是，由于业务量增加，基站根据终端的上报测量报告，给终端增加辅助服务小区，而之前该终端是与该基站的主服务小区建立了连接的。
对于本实施例步骤S202中涉及到的终端获取到辅助服务小区的资源的方式，在本实施例的一个可选实施方式中，可以通过如下方式来实现：
方式一：终端接收基站的第二通知消息，其中，第二通知消息中携带基站在辅助服务小区中竞争到的资源。
方式二：终端接收基站发送的用于在辅助服务小区竞争资源的请求消息，并依据请求消息竞争辅助服务小区的资源，且将竞争到的资源通知基站。
由上述方式一和方式二可知，终端可以获取到资源的方式可以是由基站竞争到资源后又基站通知给终端，还可以是由终端自身竞争该辅助服务小区的资源，即终端可以主动竞争资源也可以是被动接受基站竞争到的资源，该资源可以是资源的频率信息、时间信息等等。
而在本实施例的另一个可选实施方式中，对于步骤S204中涉及到的终端依据标识在获取到的资源上发送随机接入前导码的方式，可以通过如下方式三和方式四来实现：
方式三：终端接收基站通过主服务小区发送的第一通知消息，其中，该第一通知消息中携带有辅助服务小区的标识和随机接入前导码；终端依据标识在对应的辅助服务小区上在竞争到资源的第一子帧上发送随机接入前导码。
方式四：在终端接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息之前，包括：终端接收基站发送的第三通知消息，其中，第三通知消息中携带有基站为辅助服务小区预留的一个或多个随机接入前导码。
终端在获取到的资源上向基站发送随机接入前导码包括：终端接收基站发送的第一通知消息，其中，第一通知消息中携带有随机接入前导码；终端根据随机接入前导码确定需要执行随机接入过程的小区，如果确定的小区为辅助服务小区，则在该辅助服务小区竞争到的资源的第一子帧上发送随机接入前导码。
由上述方式三和方式四可知，在方式三中终端获取到的随机接入前导码可以是基站通过发送通知消息，而该消息中携带有随机接入前导码以及与该随机接入前导码匹配的辅助服务小区标识，在方式四中可以通过基站预先给辅助服务小区预留的随机接入前导码，这样终端接收到随机接入前导码时就获知到与该随机接入前导码对应的辅助服务小区。
基于上述方式三和方式四中的两种发送随机接入前导码的方式，在本实施例中正常情况下，终端是在竞争到资源的第一子帧上发送随机接入前导码，而在本实施例的其他应用场景中，并不是通过第一子帧来发送随机接入前导码，该方式的应用场景可以包括：
场景一：在第一子帧是不完全子帧时，终端延后一个子帧后发送随机接入前导码；
场景二：在竞争到资源的第一子帧且未收到基站发送的第一通知消息时，或，在竞争到资源的第一个子帧且同时也收到基站发送的第一通知消息时，终端在接收到第一通知消息后的下一个子帧发送随机接入前导码。
此外，本实施例中涉及到的响应消息还可以携带基站计算的随机前导码的时间提前量TA，因此，本实施例中步骤S206中的终端在辅助服务小区上随机接入过程正常结束之后，终端依据TA在辅助服务小区上发送数据。
对于本实施例中涉及到的在终端打开接收窗口接收基站响应于随机接入前导码响应消息之后，本实施例的方法还包括；在终端获取到的辅助服务小区的资源用尽时，终端暂停接收窗口的变化，直到再次竞争到辅助服务小区的资源。
其中，对于该方式，在本实施例的一个应用场景可以是：终端在发送随机接入前导码后第三个子帧打开接收窗口，窗口大小可配置，如当前配置为8个子帧，即窗口大小为8个子帧。在窗口打开后3个子帧，竞争到的资源已经使用完毕，则终端停止窗口的增加，定格在3个子帧长度。
而在本实施例中涉及到的在终端在辅助服务小区上随机接入过程正常结束之后，本实施例的方法还包括；在因为获取到的辅助服务小区的资源用尽且未再次获取到资源，终端未能再次收到响应消息时，终端重新发送随机接入前导码且不调整发送功率。
其中，对于该方式，在本实施例的一个应用场景可以是：终端在发送随机接入前导码后第三个子帧打开接收窗口，窗口大小可配置，如当前配置为8个子帧。在窗口打开后3个子帧，竞争到的资源已经使用完毕，窗口继续打开，直到窗口结束也没有收到RAR，而且也没有收到竞争资源信息，或者也没有竞争到资源，再次有竞争资源的时候终端重新发送随机接入前导，按照上一次发送随机接入前导码的功率来发送，不增加发送功率。
图3是根据本发明实施例的基于非授权载波执行随机接入的方法流程图二，如图3所示，该方法的步骤包括：
步骤S302：基站向终端发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，其中，第一通知消息中携带有用于指示辅助服务小区的标识，辅助服务小区为基于非授 权载波的小区；
步骤S304：基站获取辅助服务小区的资源，并将资源发送到终端，其中，资源用于终端发送随机接入前导码；
步骤S306：基站向终端发送随机接入响应RAR消息，其中，RAR消息中携带有随机接入前导码。
需要说明的是，步骤S306中RAR消息携带的随机接入前导码是用来与终端发送的随机接入前导码进行匹配的，也就是图2的实施例步骤S208中在RAR消息中携带的随机接入前导码与终端发送的随机接入前导码一致时，终端在辅助服务小区上随机接入过程正常结束；也就是说RAR消息中携带的随机接入前导码可能与终端发送的随机接入前导码一致，也有可能不一致。
此外，图2和图3的实施例分别是从基站侧和终端侧来描述本发明的，因此，上述两个实施例的是对应的，在图2的实施例中已经进行过详细描述了，在此不再对图3的实施例进行赘述，基站侧相关内容可以参照终端侧的描述。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例的方法。
在本实施例中还提供了一种基于非授权载波执行随机接入的装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图4是根据本发明实施例的基于非授权载波执行随机接入的装置的结构框图一，该装置应用于终端侧，如图4所示，该装置包括：第一处理模块42，设置为接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，并获取到辅助服务小区的资源，其中，第一通知消息中携带有用于指示辅助服务小区的标识，辅助服务小区为基于非授权载波的小区；第一发送模块44，与第一处理模块42耦合连接，设置为依据标识在获取到的资源上发送随机接入前导码；第一接收模块46，与第一发送模块44耦合连接，设置为打开接收窗口接收基站发送的随机接入响应RAR消息；执行模块48，与第一接收模块46耦合连接，设置为在RAR消息中携带的随机接入前导码与终端向基站发送的随机接入前导码一致时，在辅助服务小区上执行的随机接入过程正常结束。
图5是根据本发明实施例的基于非授权载波执行随机接入的装置的可选结构框图一，如图5所示，第一处理模块42包括：第一接收单元52，设置为接收基站的第二通知消息，其中， 第二通知消息中携带基站在辅助服务小区中竞争到的资源；或，第二接收单元54，设置为接收基站发送的用于在辅助服务小区竞争资源的请求消息；竞争单元56，设置为依据请求消息竞争辅助服务小区的资源，且将竞争到的资源通知基站。
图6是根据本发明实施例的基于非授权载波执行随机接入的装置的可选结构框图二，如图6所示，第一发送模块44包括：第三接收单元62，设置为接收基站通过辅助服务小区的主服务小区发送的第一通知消息，其中，第一通知消息中携带有辅助服务小区的标识和随机接入前导码；第一发送单元64，与第三接收单元62耦合连接，设置为依据标识在对应的辅助服务小区上竞争到资源的第一子帧上发送随机接入前导码；
图7是根据本发明实施例的基于非授权载波执行随机接入的装置的可选结构框图三，如图7所示，在终端接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息之前，本实施例的方法还包括：第二接收模块72，与第一处理模块42耦合连接，设置为收基站发送的第三通知消息，其中，第三通知消息中携带有基站为辅助服务小区预留的一个或多个随机接入前导码；该第一发送模块44包括：第四接收单元74，设置为接收基站通过主服务小区发送的第一通知消息，其中，第一通知消息中携带有基站为辅助服务小区预留的多个随机接入前导码中的一个随机接入前导码；第二发送单元76，与第四接收单元74耦合连接，设置为根据随机接入前导码确定需要执行随机接入过程的小区，如果确定的小区为辅助服务小区，则在辅助服务小区竞争到的资源的第一子帧上发送随机接入前导码。
图8是根据本发明实施例的基于非授权载波执行随机接入的装置的可选结构框图四，如图8所示，第一发送模块44包括：第三发送单元82，设置为在第一子帧是不完全子帧时，延后一个子帧后发送随机接入前导码；或，第四发送单元84，设置为在终端竞争到资源的第一子帧且未收到主服务小区发送的第一通知消息时，或在终端竞争到资源的第一个子帧且同时也收到主服务小区发送的第一通知消息时，在接收到第一通知消息后的下一个子帧发送随机接入前导码。
可选地，在终端打开接收窗口接收基站响应于随机接入前导码响应消息之后，本实施例的装置还包括；在终端获取到的辅助服务小区的资源用尽时，暂停模块，设置为暂停接收窗口的变化，直到再次竞争到辅助服务小区的资源。
可选地，在终端在辅助服务小区上随机接入过程正常结束之后，本实施例的装置还包括；在因为获取到的辅助服务小区的资源用尽且未再次获取到资源，终端未能再次收到响应消息时，处理模块，设置为重新发送随机接入前导码且不调整发送功率。
对于本实施例中涉及到的响应消息还携带有基站计算的随机前导码的时间提前量TA；因此，该执行模块38，还设置为依据TA在辅助服务小区上执行随机接入过程。
图9是根据本发明实施例的基于非授权载波执行随机接入的装置的结构框图二，该装置应用于基站侧，如图9所示，该装置包括：第二发送模块92，设置为向终端发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，其中，第一通知消息中携带有用于指示辅助服务小区的标识，辅助服务小区为基于非授权载波的小区；第二处理模块94，与第二发 送模块92耦合连接，设置为获取辅助服务小区的资源，并将资源发送到终端，其中，资源用于终端发送随机接入前导码；第三发送模块96，与第二处理模块94耦合连接，设置为向终端发送响应于随机接入前导码的响应消息，其中，响应消息中携带有随机接入前导码。
下面结合本发明的可选实施例对本发明实施例进行举例说明；
本可选实施实例提供了一种非授权载波进行随机接入的方法，该方法的步骤包括：
步骤S402：基站通知终端在辅助授权接入(Licensed Assisted Access，简称为LAA)上发起随机接入过程；
其中，LAA是自调度的小区，通过在授权载波比如Pcell上发送PDCCH order来触发LAA上发起随机接入过程，通过PDCCH order上增加小区标识或者通过专用前导分段来区分要求在Pcell上发起随机接入过程还是LAA上发起随机接入过程。
步骤S404：终端收到PDCCH order后，发送随机接入前导码；
其中，LAA在抢占到资源后，固定在抢占到的资源的第一个子帧随机接入前导码，如果第一个子帧是不完全子帧，则可以延迟一个子帧发送随机接入前导码，或者不延迟。
步骤S406：终端接收基站发送的RAR；
其中，RAR接收窗口(RA Response window)，在没有竞争到非授权载波资源到时候，暂停窗口的变化，等到竞争到资源后再继续。对于因为没有抢占到资源而没有收到RAR的，终端重新发送随机接入前导码时则不调整功率。
通过本可选实施例的方法，使得LAA能够快速完成随机接入进而进行数据收发，避免了LAA无法使用的情况。
下面结合附图和具体实施例对本可选实施例进行详细的说明；
在本可选实施例中，基站有两个小区，小区1(授权载波，也就是主服务小区)，小区3(非授权载波，也就是辅助服务小区)，小区1和小区3可以进行载波聚合。对于小区1与小区3通过双连接的方式进行聚合，如果非授权载波上小区有激活和去激活，那么该小区需要先激活再执行随机接入过程。
实施例一：
图10是根据本发明可选实施例一的方法流程图，如图10所示，终端与小区1建立了连接，基站给终端下发测量任务，并接收终端上报的测量报告，该方法的步骤包括：
步骤S1002：由于业务量增加，基站根据测量报告，给终端增加小区3，小区3为自调度小区；
步骤S1004：终端收到配置命令，增加小区3；
步骤S1006a：基站通知终端，小区3需要执行随机接入过程，通过小区1上发送PDCCH  order通知终端，在PDCCH order中携带小区3的标识，可以是小区标识或服务小区标识或指示小区3的其他指示方法，还可以携带专用前导索引如此时为60；
步骤S1006b：基站竞争小区3上的资源，竞争到资源后，通知终端，竞争资源的信息，比如竞争到的资源的频率信息，时间信息等等；
需要说明的是，该步骤S806a和步骤S806b可以同时进行。
步骤S1008，终端获取到竞争的资源；
步骤S1010：终端收到小区1上的命令，解码出小区标识是小区3知道是要求在小区3上发起随机接入过程，并且采用专用前导索引60对应的随机接入前导码，并且收到基站竞争到的资源的信息，在竞争到资源的第一个子帧发送该随机接入前导码。
其中，1)如果先收到小区1上的PDCCH order，就在竞争到资源的第一个子帧发送该随机接入前导码，如果该第一个子帧是不完全子帧，则终端可以延后一个子帧发送随机接入前导码，也可以不延后。
2)收到基站发送的竞争到的资源信息后，如果竞争到的资源的第一个子帧，终端尚未收到小区1上的PDCCH order，或者就在竞争到的资源的第一个子帧收到小区1上的PDCCH order，那么在收到小区1上的PDCCH order的下一个子帧发送该随机接入前导码，即小区1上收到PDCCH order，并解码成功获知需要发送随机接入前导，则去小区3寻找新的子帧的开始位置，寻找到该子帧则发送随机接入前导。
步骤S1012：终端在发送随机接入前导码后第三个子帧打开接收窗口，窗口大小可配置，如当前配置为8个子帧；
步骤S1014：基站收到前导码，计算TA值，通过小区1发送RAR通知终端；
步骤S1016：终端接收基站发送的随机接入响应，确认响应消息中前导码与之前发送的前导码一样，随机接入过程完成，获取随机接入响应的TA；
步骤S1018：终端可以使用TA在小区3进行上行数据发送。
实施例二：
图11是根据本发明可选实施例二的方法流程图，如图11所示，终端与小区1建立了连接，基站给终端下发测量任务，并接收终端上报的测量报告，该方法的步骤包括：
步骤S1102：由于业务量增加，基站根据测量报告，给终端增加小区3，小区3为自调度小区。
步骤S1104：终端收到配置命令，增加小区3；
步骤S1106a：基站的随机接入专用前导资源中，索引60-63预留给LAA小区，即基站上发送专用前导索引为60-63的，则终端认为应该在LAA上的小区发起随机接入，基站通过系 统消息广播或专用消息通知终端，另外，基站通知终端，小区3需要执行随机接入过程，通过小区1上发送PDCCH order通知终端，在PDCCH order中携带专用前导索引如此时为60；
步骤S1106b：终端收到基站的请求，竞争小区3上的资源，竞争到资源后，通知基站，竞争资源的信息，比如竞争到的资源的频率信息，时间信息等；
需要说明的是步骤S1006a和步骤S1006b可以同时进行。
步骤S1108：终端获取到竞争的资源信息；
步骤S1110：终端收到小区1上的命令，解码出专用前导索引60对应的随机接入前导码，获知是要求在小区3上发起随机接入过程，在竞争到资源的第一个子帧发送该随机接入前导码。
其中，1)如果先收到小区1上的PDCCH order，就在竞争到资源的第一个子帧发送该随机接入前导码，如果该第一个子帧是不完全子帧，则终端可以延后一个子帧发送随机接入前导码，也可以不延后。
2)如果竞争到的资源的第一个子帧，终端尚未收到小区1上的PDCCH order，或者就在竞争到的资源的第一个子帧收到小区1上的PDCCH order，那么在收到小区1上的PDCCH order的下一个子帧发送该随机接入前导码，
步骤S1112：终端在发送随机接入前导码后第三个子帧打开接收窗口，窗口大小可配置，如当前配置为8个子帧。
步骤S1114：基站收到前导码，计算TA值，通过小区3发送RAR通知终端；
步骤S1116：终端接收基站发送的随机接入响应，确认响应消息中前导码与之前发送的前导码一样，随机接入过程完成，获取随机接入响应的TA；
步骤S1118：终端可以使用TA在小区3进行上行数据发送。
对于上述步骤S1110，如果此时有多个LAA小区，则终端自行选择一个小区执行随机接入过程。
实施例三：
该实施例中的步骤S1202至步骤S1208与实施例二中的步骤S1102至步骤S1108是相似的，不同的是后面的步骤；
步骤S1210，终端在发送随机接入前导码后第三个子帧打开接收窗口，窗口大小可配置，如当前配置为8个子帧，即窗口大小为8个子帧。
步骤S1212：在窗口打开后3个子帧，竞争到的资源已经使用完毕，则终端停止窗口的增加，定格在3个子帧长度
步骤S1214：终端4个子帧后再次收到基站发送的竞争到的资源信息，或者终端自行竞争 到资源，在这个竞争到的资源的第一个子帧开始，窗口继续打开，即4个子帧后，第5个子帧，窗口大小变为4个子帧，如果该第一个子帧是不完全子帧，则终端可以延后一个子帧打开窗口，也可以不延后。
实施例四：
该实施例中的步骤S1302至步骤S1308与实施例二中的步骤S1102至步骤S1108是相似的，不同的是后面的步骤；
步骤S1310，终端在发送随机接入前导码后第三个子帧打开接收窗口，窗口大小可配置，如当前配置为8个子帧。
步骤S1312：在窗口打开后3个子帧，竞争到的资源已经使用完毕，窗口继续打开，直到窗口结束也没有收到RAR，而且也没有收到竞争资源信息，或者也没有竞争到资源，
步骤S1314：终端重新发送随机接入前导，按照上一次发送随机接入前导码的功率来发送，不增加发送功率。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述模块分别位于多个处理器中。
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
步骤S1：终端接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，并获取到辅助服务小区的资源，其中，辅助服务小区为基于非授权载波的小区；
步骤S2：终端依据标识在获取到的资源上发送随机接入前导码；
步骤S3：终端打开接收窗口接收基站发送的随机接入响应RAR消息；
步骤S4：在RAR消息中携带的随机接入前导码与终端发送的随机接入前导码一致时，终端在辅助服务小区上随机接入过程正常结束。
可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说， 本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
在本发明实施例中，终端接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，并获取到辅助服务小区的资源，而该辅助服务小区是非授权载波的小区，该资源是终端用于发送随机接入前导码的资源，在将随机接入前导码发送基站后，该终端接收该基站的RAR消息，在RAR消息中携带的随机接入前导码与终端发送的随机接入前导码一致时，终端在辅助服务小区上随机接入过程正常结束；通过本发明解决了相关技术中难以在非授权载波上执行随机接入过程的问题。

Claims (11)

  1. 一种基于非授权载波执行随机接入的方法，包括：
    终端接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，并获取到所述辅助服务小区的资源，其中，所述辅助服务小区为基于所述非授权载波的小区；
    所述终端在获取到的资源上向所述基站发送随机接入前导码；
    所述终端打开接收窗口接收所述基站发送的随机接入响应RAR消息；
    在所述RAR消息中携带的随机接入前导码与所述终端向基站发送的随机接入前导码一致时，所述终端在所述辅助服务小区上随机接入过程正常结束。
  2. 根据权利要求1所述的方法，其中，所述终端获取到所述辅助服务小区的资源包括：
    所述终端接收所述基站的第二通知消息，其中，所述第二通知消息中携带所述基站在所述辅助服务小区中竞争到的资源；或，
    所述终端接收所述基站发送的用于在所述辅助服务小区竞争资源的请求消息，并依据所述请求消息竞争所述辅助服务小区的资源，且将竞争到的资源通知所述基站。
  3. 根据权利要求2所述的方法，其中，所述终端在获取到的资源上向所述基站发送随机接入前导码包括：
    所述终端接收所述基站发送的所述第一通知消息，其中，所述第一通知消息中携带有所述辅助服务小区的标识和所述随机接入前导码；
    所述终端依据所述标识在对应的辅助服务小区上竞争到资源的第一子帧上发送所述随机接入前导码。
  4. 根据权利要求1所述的方法，其中，在终端接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息之前，所述方法包括：
    所述终端接收所述基站发送的第三通知消息，其中，所述第三通知消息中携带有所述基站为辅助服务小区预留的一个或多个随机接入前导码。
  5. 根据权利要求4所述的方法，其中，所述终端在获取到的资源上向基站发送随机接入前导码包括：
    所述终端接收所述基站发送的所述第一通知消息，其中，所述第一通知消息中携带有所述随机接入前导码；
    所述终端根据所述随机接入前导码确定需要执行随机接入过程的小区，如果确定的小区为所述辅助服务小区，则在所述辅助服务小区竞争到的资源的第一子帧上发送所述随机接入前导码。
  6. 根据权利要求3或5所述的方法，其中，所述终端在获取到的资源上向基站发送随机接入前导码包括：
    在所述第一子帧是不完全子帧时，所述终端延后一个子帧发送所述随机接入前导码；或，
    在竞争到资源的第一子帧且未收到所述基站发送的第一通知消息时，或，在竞争到资源的第一个子帧且同时也收到所述基站发送的第一通知消息时，所述终端在接收到所述第一通知消息后的下一个子帧发送所述随机接入前导码。
  7. 根据权利要求1所述的方法，其中，在所述终端打开接收窗口接收所述基站发送的随机接入响应RAR消息之后，所述方法还包括；
    在所述辅助服务小区的资源用尽时，所述终端暂停所述接收窗口的变化，直到再次竞争到所述辅助服务小区的资源。
  8. 根据权利要求1所述的方法，其中，在所述终端在所述辅助服务小区上随机接入过程正常结束之后，所述方法还包括；
    在因为获取到的所述辅助服务小区的资源用尽且未再次获取到所述资源，所述终端未能再次收到响应消息时，所述终端重新发送所述随机接入前导码时不调整发送功率。
  9. 一种基于非授权载波执行随机接入的方法，包括：
    基站向终端发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，其中，第一通知消息中携带有用于指示所述辅助服务小区的标识，所述辅助服务小区为基于所述非授权载波的小区；
    所述基站获取所述辅助服务小区的资源，并将所述资源发送到所述终端，其中，所述资源用于所述终端发送随机接入前导码；
    所述基站向所述终端发送随机接入响应RAR消息，其中，所述RAR消息中携带有随机接入前导码。
  10. 一种基于非授权载波执行随机接入的装置，应用于终端侧，包括：
    第一处理模块，设置为接收基站发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，并获取到所述辅助服务小区的资源，其中，所述辅助服务小区为基于所述非授权载波的小区；
    第一发送模块，设置为在获取到的资源上向所述基站发送随机接入前导码；
    第一接收模块，设置为打开接收窗口接收所述基站发送的随机接入响应RAR消息；
    执行模块，设置为在所述RAR消息中携带的随机接入前导码与所述终端向基站发送的随机接入前导码一致时，在所述辅助服务小区上执行的随机接入过程正常结束。
  11. 一种基于非授权载波执行随机接入的装置，用于基站侧，包括：
    第二发送模块，设置为向终端发送用于指示在辅助服务小区中执行随机接入过程的第一通知消息，其中，第一通知消息中携带有用于指示所述辅助服务小区的标识，所述辅助服务小区为基于所述非授权载波的小区；
    第二处理模块，设置为获取所述辅助服务小区的资源，并将所述资源发送到所述终端，其中，所述资源用于所述终端发送随机接入前导码；
    第三发送模块，设置为向所述终端发送随机接入响应RAR消息，其中，所述RAR消息中携带有随机接入前导码。
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