WO2011116714A2 - Procédé et dispositif pour communication entre terminaux - Google Patents

Procédé et dispositif pour communication entre terminaux Download PDF

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Publication number
WO2011116714A2
WO2011116714A2 PCT/CN2011/073446 CN2011073446W WO2011116714A2 WO 2011116714 A2 WO2011116714 A2 WO 2011116714A2 CN 2011073446 W CN2011073446 W CN 2011073446W WO 2011116714 A2 WO2011116714 A2 WO 2011116714A2
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WO
WIPO (PCT)
Prior art keywords
base station
terminals
data
terminal
communication mode
Prior art date
Application number
PCT/CN2011/073446
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English (en)
Chinese (zh)
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WO2011116714A3 (fr
Inventor
张伟
张舜卿
徐树公
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2011/073446 priority Critical patent/WO2011116714A2/fr
Priority to CN201180000417.2A priority patent/CN102172090B/zh
Publication of WO2011116714A2 publication Critical patent/WO2011116714A2/fr
Publication of WO2011116714A3 publication Critical patent/WO2011116714A3/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/23—Manipulation of direct-mode connections

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a communication method and device between terminals. Background technique
  • Terminal-centric, data-sourced services will also gradually replace existing service provider-centric services.
  • future communications there will be a large number of situations in which terminals within the service range of the base station communicate with each other.
  • the base station needs to obtain the receiving end information according to the bearer identifier or the destination address of the data packet, find the corresponding downlink bearer link, and set the data by the bearer chain.
  • the road is sent to the receiving end.
  • the base station needs to perform codec operation and data packet transmission on the data packets transmitted by each terminal, thereby wasting the processing resources of the base station and the wireless air interface resources.
  • the embodiments of the present invention provide a communication method and device between terminals, which solves the problem of wasting the processing resources of the base station and the wireless air interface resources in the prior art.
  • An embodiment of the present invention provides a communication method between terminals, including:
  • the base station forwards the received data to the two terminals at the same time, so that the two terminals respectively acquire data sent by the opposite end.
  • An embodiment of the present invention provides another method for communication between terminals, including: The terminal that enters the direct communication mode forwards the data sent to the peer end to the base station, so that the base station forwards the received data to the terminal and the opposite end at the same time, and the terminal and the opposite end are located in the service range of the base station;
  • the terminal acquires data sent by the opposite end according to the received data forwarded by the base station.
  • the embodiment of the invention further provides a base station, including:
  • a receiving unit configured to receive data sent to the opposite end by two terminals entering the direct communication mode, where the two terminals are located in a service range of the base station;
  • a sending unit configured to forward the data received by the receiving unit to the two terminals at the same time, so that the two terminals respectively obtain data sent by the opposite end.
  • the embodiment of the invention further provides a terminal, including:
  • a sending unit configured to forward the data sent to the peer end to the base station, so that the base station simultaneously forwards the received data to the terminal and the opposite end, where the terminal and the opposite end are located at the base station within the scope of services;
  • a receiving unit configured to receive data forwarded by the base station
  • an acquiring unit configured to acquire data sent by the opposite end according to the data received by the receiving unit.
  • the method and device for communication between terminals provided by the embodiments of the present invention are located in two terminals within the service range of the same base station. After entering the direct communication mode, the two terminals send data sent to the opposite end to the base station, and the base station will receive the data. At the same time, the two terminals are forwarded to each other, so that the two terminals respectively obtain the data sent by the opposite end.
  • the base station does not need to perform processing such as decoding the received data, which saves processing resources of the base station and saves wireless air interface resources.
  • FIG. 1 is a flowchart of an embodiment of a method for communication between terminals according to the present invention
  • FIG. 2 is a flowchart of still another embodiment of a method for communication between terminals according to the present invention
  • FIG. 3 is a communication between terminals provided by the present invention.
  • Method flow chart of another embodiment
  • FIG. 4 is a schematic structural diagram of an embodiment of a base station provided by the present invention
  • FIG. 5 is a schematic structural diagram of still another embodiment of a base station according to the present invention.
  • FIG. 6 is a schematic structural diagram of an embodiment of a terminal provided by the present invention. detailed description
  • FIG. 1 is a flowchart of an embodiment of a method for communication between terminals according to the present invention. As shown in FIG. 1, the method includes:
  • the base station receives data sent to the opposite end by two terminals entering the direct communication mode, where the two terminals are located in a service range of the base station;
  • S102 The base station forwards the received data to the two terminals at the same time, so that the two terminals respectively obtain data sent by the opposite end.
  • the method for communication between terminals is applicable to Long Term Evolution (LTE), Universal Mobile Telecommunications System (UMTS), Code Division Multiple Access (CDMA), and LTE.
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • CDMA Code Division Multiple Access
  • LTE-A Subsequent evolution
  • WiMAX Worldwide Interoperability for Microwave Access
  • the execution base station of the above steps may be an evolved base station (eNB), a base station (BS), a Node B, an access point, and the like.
  • the base station may be a macro base station, a medium base station, or a micro base station, such as a home base station.
  • Each base Stations can provide communication coverage for specific geographic areas.
  • the two terminals involved in the embodiment of the present invention perform data interaction within the service range of the same base station, and the terminal may be a user equipment (UE), a mobile station (MS), and a subscriber unit. Station (station) and so on.
  • the terminal can also be a cellular phone, a personal digital assistant (PDA), a wireless modem (modem), a wireless communication device, a handheld device, a laptop computer, a cordless phone ( Cordless phone ) , wireless local loop (WLL) station, etc.
  • PDA personal digital assistant
  • modem wireless modem
  • wireless communication device a handheld device, a laptop computer
  • cordless phone Cordless phone
  • WLL wireless local loop
  • the base station may perform some judgments first, for example: the channel quality between the two terminals and the base station, and the traffic volume transmitted, when certain conditions are met.
  • the base station can notify the specific services of the two terminals to perform a direct communication mode.
  • the base station can allocate the same uplink resource to the two terminals according to the traffic volume situation of the two terminals.
  • the two terminals can send the service data sent to the peer end on the allocated uplink resources.
  • the base station allocates the same downlink resource to the two terminals according to the received data, and the base station forwards the data sent by the two terminals to the two terminals simultaneously on the allocated downlink resources.
  • the data received by each terminal is the data superimposed by the data sent by the two terminals to the base station.
  • Each terminal can further perform self-signal cancellation according to data previously sent to the base station, thereby obtaining data transmitted by the opposite end.
  • the communication method between the terminals provided by the embodiment of the present invention is located in the service range of the same base station. After entering the direct communication mode, the two terminals send data sent to the opposite end to the base station, and the base station simultaneously forwards the received data. Give two terminals, so that the two terminals respectively obtain the data sent by the peer.
  • the base station performs processing such as decoding on the received data, thereby saving processing resources of the base station and saving wireless air interface resources.
  • the method includes: 5201.
  • the terminal that enters the direct communication mode forwards the data sent to the peer end to the base station, so that the base station forwards the received data to the terminal at the same time, where the terminal and the peer end are located in the service range of the base station;
  • S202 The terminal acquires data sent by the peer end according to the received data forwarded by the base station.
  • the execution subject terminal of the above steps may be any one of two terminals that enter the direct communication mode within the service range of the same base station.
  • the base station may perform some judgments first, for example: the channel quality between the two terminals and the base station, and the traffic volume transmitted, when certain conditions are met.
  • the base station can notify the specific services of the two terminals to perform a direct communication mode.
  • the base station can allocate the same uplink resource to the two terminals according to the traffic volume situation of the two terminals.
  • Each terminal can send the service data to the peer end on the allocated uplink resource.
  • the base station sends the same downlink resource to the two terminals according to the received data, and the base station forwards the data sent by the two terminals to the two terminals simultaneously on the allocated downlink resource.
  • the data received by each terminal is the sum of the data sent by the two terminals to the base station.
  • Each terminal can further perform self-signal cancellation according to data previously sent to the base station, thereby obtaining data transmitted by the opposite end.
  • the method for communication between terminals according to the embodiment of the present invention is located in two terminals within the service range of the same base station. After entering the direct communication mode, each terminal sends data to the opposite end to the base station, and the base station simultaneously forwards the received data. For two terminals, each terminal can obtain the data sent by the peer from the received data.
  • the base station performs processing such as decoding on the received data, thereby saving processing resources of the base station and saving wireless air interface resources.
  • FIG. 3 is a flowchart of another embodiment of a method for communication between terminals according to the present invention. As shown in FIG. 3, the method includes:
  • the base station determines whether the two terminals UE1 and UE2 that establish the service meet the preset condition for entering the direct communication mode. If yes, execute S302, otherwise the process ends.
  • the two terminals UE1 and UE2 are in the same base station service area, and at least one service is established between the UE1 and the UE2.
  • the UE1 and the UE2 are in the process of establishing the service.
  • the base station determines whether the peer end is within the service range of the same base station according to the communication peer information carried in the signaling of the establishment service. If the peer end is within the service range of the same base station, the base station further determines whether the UE1 and the UE2 satisfy the preset.
  • the condition of the direct communication mode is entered by the base station; the process of determining the S201 by the base station may also be performed when the UE 1 and the U E2 are switched to the service range of the base station, for example: during the handover process, the UE1 moves to the service range of the base station, and the base station is During the process of establishing a bearer, the UE1 obtains the peer information, so as to further determine whether the UE1 and the UE2 meet the preset conditions for entering the direct communication mode.
  • the determining process performed by the base station in S201 may also be performed when the UE1 and the UE2 exit the idle mode, and the UE1 Or when the channel quality between the UE2 and the base station changes, for example: the base station learns UE1 and UE2 Communicate with each other under the same base station, but the channel quality between the two base stations does not satisfy the conditions for entering direct communication.
  • the base station can detect the channel quality changes of UE1 and UE2 in real time. When the direct communication condition is met, the base station can trigger UE 1 and U E2 to enter the direct communication mode.
  • the base station may specifically according to UE1 and/or UE2 capabilities (capability of supporting direct communication mode), channel quality between UE1 and base station, channel quality between UE2 and base station, and UE1 and The traffic volume of each service between the base stations, and the traffic volume of each service between the UE2 and the base station are judged. For example, when the channel quality between the UE1 and the base station is substantially the same as the channel quality between the UE2 and the base station, and the traffic of the at least one service is substantially equal, the base station can achieve maximum gain in saving wireless transmission resources and transmitting power.
  • the base station can be substantially the same as the channel quality between the UE1 and the base station and the channel quality between the UE2 and the base station, and at least one traffic amount is substantially equal as a condition for entering the direct communication mode.
  • the conditions for entering the direct communication mode can also be set according to the actual situation and the specific service requirements of U E 1 and U E2.
  • the base station sends the first notification signaling to the UE1 and the UE2, where the first notification signaling carries the direct communication mode indication identifier and the at least one service identifier, so that the UE1 and the UE2 are At least one service enters the direct communication mode.
  • the incoming direct communication mode indication identifier is used to indicate that the service corresponding to the at least one service identifier between the U E 1 and the U E2 enters the direct communication mode.
  • the service identifier of the direct communication mode may be: a bearer identifier carrying the service, identification information of the service, and an internet protocol (IP) quintuple.
  • IP internet protocol
  • the specific form of the service identifier is related to the bearer type that carries the service.
  • the service identifier carried in the notification signaling may be the bearer identifier, the service flow identifier, or the IP quintuple; Service, because the public bearer may have multiple services, the service identifier carried in the notification signaling can only use the identifier of the service granularity, for example, the service identifier or the IP quintuple.
  • the notification signaling may carry the security association information, where the security association information is used to encrypt at least one service data entering the direct communication mode, or the UE1 and the UE2, in addition to carrying the direct communication mode indication identifier and the at least one service identifier. Decrypt. This is because the terminal and the base station encrypt the transmitted data using the terminal granularity transmission key when communicating normally. After the terminal enters the direct transmission mode, the data sent by the transmitting terminal is directly transmitted to the receiving terminal for processing. Therefore, the original security mechanism cannot work normally. Therefore, when the terminal enters the direct communication mode, the base station can configure the terminal for security.
  • the alliance information is used to encrypt or decrypt the transmitted data after the terminal enters the direct communication mode.
  • the UE1 and the UE2 After obtaining the first notification signaling sent by the base station, the UE1 and the UE2 enter the direct communication mode.
  • UE1 and UE2 After receiving the first notification signaling sent by the base station, UE1 and UE2 mark the service object corresponding to the service identifier entering the direct communication mode as a direct communication mode or a normal communication mode, and update the security association information.
  • the UE1 and the UE2 that are in the direct communication mode respectively send a scheduling request to the base station, where the scheduling request carries at least one service identifier.
  • the scheduling request is used to request the base station to allocate an uplink resource for the service corresponding to the carried service identifier. 5305.
  • the base station determines, according to the service identifier carried in the scheduling request sent by the UE1 and the UE2, whether the service identifier sent by the UE1 and the UE2 is the same. If yes, execute S306.
  • the base station allocates uplink resources to UE1 and UE2.
  • the base station may allocate the same uplink resource to the two terminals according to the service with the largest amount of data transmitted in the service corresponding to the at least one service identifier carried in the scheduling request.
  • the base station sends the uplink resource allocation indication information to the UE1 and the UE2, where the uplink resource allocation indication information carries the allocated uplink resource information and the at least one service identifier.
  • the uplink resource allocation indication information may be carried by a Physical Downlink Control Channel (PDCCH) channel, where the service identifier carried in the uplink resource allocation indication information is used to describe a service object targeted by the allocated uplink resource, to avoid UE1 or U E2 sends other service data on the allocated uplink resources.
  • PDCCH Physical Downlink Control Channel
  • the UE1 and the UE2 After receiving the uplink resource allocation indication information sent by the base station, the UE1 and the UE2 send the corresponding service data on the allocated uplink resource according to the service identifier carried in the uplink resource allocation indication information.
  • the base station receives data sent by UE1 and UE2 on the allocated uplink resource.
  • the base station allocates the same downlink resource to UE1 and UE2 according to the data received on the allocated uplink resource.
  • the base station sends the downlink resource allocation indication information to the UE1 and the UE2, where the downlink resource allocation indication information carries the allocated downlink resource information.
  • the downlink resource allocation indication information may also be carried through the PDCCH channel.
  • the base station forwards the data received on the allocated uplink resource to the UE1 and the UE2 on the allocated downlink resource, so that the UE1 and the UE2 acquire the data sent by the peer end.
  • the UE1 and the UE2 After receiving the data forwarded by the base station on the allocated downlink resource, the UE1 and the UE2 remove the data sent to the peer end from the received data to obtain the data sent by the peer end. The UE1 and the UE2 decrypt the received data using the foregoing updated security association to obtain the original data sent by the opposite end.
  • UE1 or UE2 After receiving the data sent by the base station, UE1 or UE2 needs to perform self-signal cancellation to obtain the data sent by the peer.
  • There are various ways to perform self-signal cancellation For example, UE1 and/or UE2 can perform self-signal cancellation according to chronological order (ie, sequence number of frames), and UE1 and/or UE2 can set (default) to receive the nth frame sent by the base station.
  • the nm frame data sent to the opposite end is used as data to be erased, wherein the specific value of m can be configured at the terminal, or the terminal obtains when entering the direct communication mode, or is provided by the base station to the terminal in the direct communication mode.
  • the base station may further carry the frame number of the data to be eliminated in the downlink resource allocation indication information that is sent to the terminal, and the terminal obtains the data to be eliminated according to the frame number of the to-be-cancelled data, where the frame number identifier may be an absolute frame number, or After receiving the data sent by the base station, the terminal can obtain the data to be eliminated according to the frame number of the data to be eliminated, thereby obtaining the data sent by the peer end.
  • the absolute frame number or the relative frame number corresponding to the frame number identifier is unique in the direct communication between UE1 and UE2. Therefore, UE1 and UE2 can uniquely determine the data to be eliminated according to the frame number of the data to be eliminated.
  • the base station may further determine, according to the change of the channel quality between the UE1 and/or the UE2 and the base station, or the change of the traffic volume, whether the UE1 and the UE2 are required to exit the direct communication mode, and the base station determines whether the UE1 and the UE2 enter the direct communication mode.
  • the base station may preset a condition for exiting the direct communication mode.
  • the base station When the condition is met, the base station sends a second notification signaling to the UE1 and the UE2, where the notification signaling carries the exit direct communication mode indication identifier and the at least one service identifier. , indicating that the corresponding services of UE1 and UE2 exit the direct communication mode.
  • the storage medium may be a magnetic disk, an optical disk, or a read-only storage memory. (Read-Only Memory, ROM) or random access memory (RAM).
  • the base station includes: a receiving unit 11 and a transmitting unit 12;
  • the receiving unit 11 is configured to receive data sent to the opposite end by two terminals entering the direct communication mode, where the two terminals are located in a service range of the base station;
  • the sending unit 12 is configured to forward the data received by the receiving unit 11 to the two terminals, so that the two terminals simultaneously acquire data sent by the opposite end.
  • FIG. 5 is a schematic structural diagram of another embodiment of a base station according to the present invention. As shown in FIG. 5, the base station includes: a receiving unit 11 and a sending unit 12;
  • the base station may further include: a determining unit 13;
  • the determining unit 13 is configured to determine whether the two terminals meet the set condition of entering the direct communication mode
  • the sending unit 12 is further configured to: if the two terminals meet the condition for entering the direct communication mode, the base station sends first notification signaling to the two terminals, where the first notification signaling is Carrying the direct communication mode indication identifier and the at least one service identifier, so that at least one service between the two terminals enters a direct communication mode.
  • the receiving unit 11 is further configured to: receive a scheduling request that is sent by the two terminals, where the scheduling request carries at least one service identifier;
  • the base station may further include: a resource allocation unit 14;
  • the resource allocation unit 14 is configured to allocate uplink resources to the two terminals if at least one of the scheduling requests sent by the two terminals is the same;
  • the sending unit 12 is further configured to: send the uplink resource allocation indication information to the two terminals, where the uplink resource allocation indication information carries the allocated uplink resource information and the at least one service identifier.
  • the receiving unit 11 is specifically configured to: receive the two on the allocated uplink resource The data sent by the terminal.
  • the resource allocation unit 14 is further configured to: allocate, by the base station, the same downlink resource to the two terminals according to the data received on the allocated uplink resource;
  • the sending unit 12 is further configured to: send the downlink resource allocation indication information to the two terminals, where the downlink resource allocation indication information carries the allocated downlink resource information.
  • the sending unit 12 may be specifically configured to: forward the data received on the allocated uplink resource to the two terminals simultaneously on the allocated downlink resource, so that the two terminals acquire the peer end sending The data.
  • the base station provided by the embodiment of the present invention is a device for performing communication between terminals according to an embodiment of the present invention.
  • the detailed process of the method for performing communication between terminals may be See the method embodiment, and details are not described herein again.
  • the base station provided by the embodiment of the present invention is located in the service range of the same base station. After entering the direct communication mode, the two terminals send data sent to the opposite end to the base station, and the base station simultaneously forwards the received data to the two terminals. So that the two terminals respectively obtain the data sent by the opposite end.
  • the base station performs processing such as decoding the received data, thereby saving processing resources of the base station and saving wireless air interface resources.
  • the terminal includes: a sending unit 21, a receiving unit 22, and an obtaining unit 23;
  • the sending unit 21 is configured to forward the data sent to the opposite end to the base station, so that the base station forwards the received data to the terminal at the same time, where the terminal and the peer end are located in the service range of the base station.
  • the receiving unit 22 is configured to receive data forwarded by the base station
  • the obtaining unit 23 is configured to obtain data sent by the ten end according to the data received by the receiving unit 22.
  • the receiving unit 22 is further configured to: receive the first notification signaling sent by the base station, where the first notification signaling carries the direct communication mode indication identifier and the at least one service Identifying that at least one service between the terminal and the peer enters directly Communication mode.
  • the sending unit 21 is further configured to: send a scheduling request to the base station, where the scheduling request carries at least one service identifier;
  • the receiving unit 22 may be further configured to: receive the uplink resource allocation indication information that is sent by the base station, where the uplink resource allocation indication information carries the allocated uplink resource information and the at least one service identifier.
  • the sending unit 21 may be specifically configured to: forward data sent to the peer to the base station on the allocated uplink resource.
  • the receiving unit 22 is further configured to: receive the downlink resource allocation indication information that is sent by the base station, where the downlink resource allocation indication information carries the allocated downlink resource information.
  • the receiving unit 22 is further configured to: receive the data forwarded by the base station on the allocated downlink resource; the acquiring unit 23 may be specifically configured to: remove data sent to the peer end from the received data, to obtain the peer end sending The data.
  • the terminal provided by the embodiment of the present invention is a device for performing communication between terminals according to an embodiment of the present invention.
  • the detailed process of the method for performing communication between terminals may be See the method embodiment, and details are not described herein again.
  • the terminal provided by the embodiment of the present invention is located in the service range of the same base station. After entering the direct communication mode, each terminal sends data sent to the opposite end to the base station, and the base station forwards the received data to the two terminals simultaneously. Each terminal can obtain data sent by the peer end from the received data.
  • the base station performs processing such as decoding on the received data, thereby saving processing resources of the base station and saving wireless air interface resources.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon des modes de réalisation, la présente invention concerne un procédé et dispositif pour communication entre terminaux. Le procédé comprend les étapes suivantes: une station de base reçoit des données qui sont transmises mutuellement entre eux par deux terminaux entrant en mode de communication directe, les deux terminaux étant situés dans la zone de service de la station de base ; la station de base transmet simultanément les données reçues aux deux terminaux, de sorte que les deux terminaux acquièrent respectivement les données transmises entre eux. Selon les modes de réalisation, la présente invention permet l'acquisition respective par deux terminaux des données transmises entre eux. Selon des modes de réalisation de la présente invention, une station de base effectue le traitement des données reçues, tel que décodage et autres, permettant ainsi d'économiser des ressources de traitement de la station de base, et les ressources d'interface radio sans fil.
PCT/CN2011/073446 2011-04-28 2011-04-28 Procédé et dispositif pour communication entre terminaux WO2011116714A2 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2011/073446 WO2011116714A2 (fr) 2011-04-28 2011-04-28 Procédé et dispositif pour communication entre terminaux
CN201180000417.2A CN102172090B (zh) 2011-04-28 2011-04-28 终端间的通信方法和设备

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WO2011116714A3 WO2011116714A3 (fr) 2012-03-22

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CN102665213A (zh) * 2012-04-05 2012-09-12 中国联合网络通信集团有限公司 数据直通处理方法、设备和系统
CN102665213B (zh) * 2012-04-05 2016-02-03 中国联合网络通信集团有限公司 数据直通处理方法、设备和系统

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