WO2016155020A1 - 数据传输的方法、用户设备和基站 - Google Patents

数据传输的方法、用户设备和基站 Download PDF

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Publication number
WO2016155020A1
WO2016155020A1 PCT/CN2015/075922 CN2015075922W WO2016155020A1 WO 2016155020 A1 WO2016155020 A1 WO 2016155020A1 CN 2015075922 W CN2015075922 W CN 2015075922W WO 2016155020 A1 WO2016155020 A1 WO 2016155020A1
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WO
WIPO (PCT)
Prior art keywords
base station
message
relay
data
relayed
Prior art date
Application number
PCT/CN2015/075922
Other languages
English (en)
French (fr)
Inventor
黎超
李亚娟
张兴炜
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 KR1020177031258A priority Critical patent/KR102015935B1/ko
Priority to PCT/CN2015/075922 priority patent/WO2016155020A1/zh
Priority to JP2017551639A priority patent/JP6472537B2/ja
Priority to EP15886990.9A priority patent/EP3270654B1/en
Priority to CN201580071013.0A priority patent/CN107113894B/zh
Publication of WO2016155020A1 publication Critical patent/WO2016155020A1/zh
Priority to US15/722,824 priority patent/US10194471B2/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/02Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/14Direct-mode setup
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/22Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24Transfer of terminal data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • H04W88/04Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • Embodiments of the present invention relate to the field of communications, and, more particularly, to a method, a user equipment, and a base station for data transmission.
  • the user equipment (User Equipment, UE) in the cell in which the base station is located can perform data communication through the cellular link.
  • the UE 30 is located in the cell 40 of the base station 10, and then the base station 10 and the UE 30 pass the cellular.
  • the link performs uplink and downlink data transmission.
  • the UE 20 since the UE 20 is in the cell 60 where the base station 50 is located, direct data communication cannot be performed between the base station 10 and the UE 20.
  • the data transmission between the base station 10 and the UE 20 needs to be performed by means of the base station 50.
  • the UE 20 if the UE 20 needs to send uplink data to the base station 10, the UE 20 first needs to first send uplink data to the base station 50 through the cellular link, and then the base station 50 forwards the uplink data to the base station 10.
  • the base station 10 needs to transmit downlink data to the UE 20
  • the base station 10 first needs to send downlink data to the base station 50, and then the base station 50 forwards the downlink data to the UE 20 through the cellular link.
  • the embodiment of the invention provides a data transmission method, which can ensure the efficiency of data transmission.
  • a method of data transmission comprising:
  • the second UE receives a third message sent by the base station, and the third message indicates that the second UE is the relay UE.
  • a method of data transmission including:
  • the base station Receiving, by the base station, the first message, where the first message includes information for allocating a relay UE for data transmission performed by the first UE and the base station;
  • the base station sends a second message to the second UE, where the second message indicates the second UE as the relay UE.
  • a method of data transmission including:
  • the base station sends a first message to the at least one user equipment UE, where the first message includes relay request information that the base station performs data transmission with the first UE;
  • the base station receives a second message sent by a part of the at least one UE or all the UEs, the second message is a response message of the first message, and the part of the UE or all the UEs includes the second UE;
  • the base station sends a third message to the second UE, where the third message indicates that the second UE is a relay UE that performs data transmission between the base station and the first UE.
  • a user equipment is provided, where the user equipment is a second user equipment, including:
  • a receiving unit configured to receive a first message sent by the first UE or the base station, where the first message includes relay request information
  • a sending unit configured to send, according to the first message received by the receiving unit, a second message to the base station, where the second message includes the second UE requesting, as the first UE, the base station Information of the relay UE that performs data transmission;
  • the receiving unit is further configured to receive a third message sent by the base station, where the third message indicates that the second UE is the relay UE.
  • a base station including:
  • a receiving unit configured to receive a first message, where the first message includes information that is required to allocate a relay UE for data transmission performed by the first UE and the base station;
  • a sending unit configured to send a second message to the second UE, where the second message indicates the second UE as the relay UE.
  • a base station including:
  • a sending unit configured to send a first message to the at least one user equipment UE, where the first message includes relay request information that the base station performs data transmission with the first UE;
  • a receiving unit configured to receive a second message sent by a part of the at least one UE or all UEs, where the second message is a response message of the first message, the part of the UE or all
  • the UE includes a second UE;
  • the sending unit is further configured to send a third message to the second UE, where the third message indicates that the second UE is a relay UE that performs data transmission between the base station and the first UE.
  • the seventh aspect provides a user equipment, where the user equipment is a second user equipment, including:
  • a receiver configured to receive a first message sent by the first UE or the base station, where the first message includes relay request information
  • a transmitter configured to send, according to the first message received by the receiver, a second message to a base station, where the second message includes the second UE requesting, as the first UE, the base station Information of the relay UE that performs data transmission;
  • the receiver is further configured to receive a third message sent by the base station, where the third message indicates the second UE as the relay UE.
  • a base station including:
  • a receiver configured to receive a first message, where the first message includes information that is required to allocate a relay UE for data transmission performed by the first UE and the base station;
  • a transmitter configured to send a second message to the second UE, where the second message indicates the second UE as the relay UE.
  • a base station including:
  • a transmitter configured to send a first message to the at least one user equipment UE, where the first message includes relay request information that the base station performs data transmission with the first UE;
  • a receiver configured to receive a second message sent by a part of the UE or all UEs in the at least one UE, where the second message is a response message of the first message, and the part of the UE or all UEs includes a second UE ;
  • the transmitter is further configured to send a third message to the second UE, where the third message indicates that the second UE is a relay UE that performs data transmission between the base station and the first UE.
  • the second UE is configured as the relay UE by the base station, and the second UE can be enabled to perform data transmission between the base station and the first UE, so that the efficiency of data transmission can be ensured.
  • FIG. 1 is a schematic diagram of a scene described in the background art.
  • FIG. 2 is a schematic diagram of an application scenario of an embodiment of the present invention.
  • FIG. 3 is a flow diagram of a process of data transmission in accordance with an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of another application scenario of an embodiment of the present invention.
  • FIG. 5 is a flowchart of a method for determining whether a relay is successful according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of a method of determining whether to act as a relay UE according to an embodiment of the present invention.
  • FIG. 7 is a flow interaction diagram of a method of data transmission according to another embodiment of the present invention.
  • FIG. 8 is a flow interaction diagram of a method of data transmission according to another embodiment of the present invention.
  • FIG. 9 is a flow interaction diagram of a method of data transmission according to another embodiment of the present invention.
  • FIG. 10 is a schematic diagram of another application scenario of an embodiment of the present invention.
  • FIG. 11 is a flow chart of a method of data transmission in accordance with an embodiment of the present invention.
  • FIG. 12 is a flow chart of a method of data transmission in accordance with another embodiment of the present invention.
  • FIG. 13 is a flow chart of a method of data transmission in accordance with another embodiment of the present invention.
  • FIG. 14 is a structural block diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 15 is a structural block diagram of a user equipment according to another embodiment of the present invention.
  • FIG. 16 is a structural block diagram of a user equipment according to another embodiment of the present invention.
  • Figure 17 is a block diagram showing the structure of a base station according to an embodiment of the present invention.
  • Figure 18 is a block diagram showing the structure of a base station according to another embodiment of the present invention.
  • Figure 19 is a block diagram showing the structure of a base station according to another embodiment of the present invention.
  • Figure 20 is a block diagram showing the structure of a base station according to another embodiment of the present invention.
  • Figure 21 is a block diagram showing the structure of a base station according to another embodiment of the present invention.
  • Figure 22 is a block diagram showing the structure of a base station according to another embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • Universal Mobile Telecommunications System Universal Mobile Telecommunication System, UMTS
  • the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (Evolutional Node). B, eNB or eNodeB), or a base station device in a future 5G network, etc., which is not limited by the present invention.
  • B Base Transceiver Station
  • NodeB base station
  • LTE Evolutional Node
  • the UE may communicate with one or more core networks through a Radio Access Network (RAN), and the UE may be referred to as an access terminal, a terminal device, or Subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • the UE may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), or a wireless communication function.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • User direct communication is a direct communication technology. Data interaction between UEs does not need to be forwarded by the base station. The UEs can directly interact with each other or directly interact with the network.
  • network coverage There are three working scenarios for user direct communication: network coverage, no network coverage, and partial network coverage.
  • the user equipment participating in the direct communication of the user is within the service range of the base station.
  • the user equipment participating in the direct communication of the user is outside the service range of the base station.
  • part of the network is covered, part of the user equipment participating in the direct communication of the user is within the service range of the base station, and another part of the user equipment is outside the service range of the base station.
  • D2D Device to Device
  • D2D refers to the transmission of data between multiple devices that can directly reach the other party without passing through the third device during data transmission.
  • different UEs can be transferred to each other without going through a network device such as a base station. Send and receive directly.
  • the link between D2Ds is also called Sidelink in some places.
  • D2D is used as a term, but the term does not limit the method of the present invention. The range used.
  • D2D Device to Device
  • D2D communication User direct communication is divided into Device to Device (D2D) discovery and D2D communication.
  • the D2D discovery means that the user equipment sends a discovery message, and the other user equipment obtains the information of the user equipment that sends the discovery message by reading the discovery message.
  • the discovery message may include identity information of the user equipment that sent the discovery message, such as an identity.
  • D2D discovery is divided into two types: type 1 (type 1) and type 2 (type 2).
  • type 1 refers to a resource pool for D2D discovery of multiple user equipments (the resource pool of which type 1 may be referred to as D2D discovery) is autonomously configured or selected by the user.
  • Type 2 means that the transmission resource for D2D discovery of one user equipment is configured by the base station.
  • D2D communication means that the user equipment sends control information and data, and other user equipments obtain information such as the transmission format of the subsequent data by reading the control information, thereby correctly receiving subsequent data.
  • Mode 1 refers to a resource used by a base station or a relay node to schedule user equipment for transmitting data and control information of user direct communication.
  • the control information may be a Scheduling Assignment (SA) message.
  • SA Scheduling Assignment
  • the base station indicates, by downlink signaling, the resource and format of the scheduling allocation and data, and the like.
  • Mode 2 refers to a resource in which a user equipment itself selects data for transmitting direct communication and an SA message from a resource pool (which may be referred to as a resource pool of mode 2 of D2D communication), wherein the resource of mode 2 of the D2D communication
  • the pool may include an SA message resource pool and a resource pool of data corresponding to the SA message.
  • the user equipment may select a resource for transmitting the SA message from the SA message resource pool, and select a resource for transmitting data corresponding to the SA message from the resource pool of the data corresponding to the SA message.
  • the resource pool refers to a group of communication resources, which is a collection of multiple communication resources.
  • FIG. 2 is a schematic diagram of an application scenario of an embodiment of the present invention.
  • the embodiment of the present invention is mainly used to solve data communication between the base station 10 and the UE 20.
  • the UE 30 located within the cell 40 in which the base station 10 is located is also shown in FIG. That is, the base station 10 is a serving base station of the UE 30.
  • the embodiment of the present invention assumes that the UE 20 and the UE 30 are capable of D2D communication.
  • the UE 30 can directly perform data transmission with the base station 10, and the UE 20 and the base station 10 do not directly perform data transmission.
  • the UE 20 and the base station 10 do not directly perform data transmission.
  • the cause may be an objective cause, such as too far distance or poor signal quality, etc.; or may be subjective reasons, for example, base station 10 does not allow data transmission between UE 20 and the base station.
  • the UE 20 is outside the cell 40 of the base station 10. It is assumed that the UE 20 is initially located in the cell 40 where the base station 10 is located, and then the UE 20 moves outside the cell 40 due to the change of the location. Direct communication with the base station 10. At this time, the UE 30 can serve as a relay UE to assist in data transmission between the UE 20 and the base station 10.
  • the UE 20 may be referred to as a remote UE, and the UE 30 as a relay may be referred to as a relay UE.
  • the UE 20 can send the data directly to the UE 30.
  • the UE 20 may also transmit data indirectly to the UE 30, for example, the UE 20 first transmits data to one or more intermediate UEs (UE 21 shown in Figure 2(a)), and then one or more The intermediate UE forwards to the UE 30.
  • the UE 30 may directly transmit data transmitted by the base station 10 to the UE 20, or the UE 30 may also indirectly transmit data transmitted by the base station 10 to the UE 20 through one or more intermediate UEs (e.g., the UE 21).
  • one or more intermediate UEs herein may all be located outside the cell 40; or may all be located in the cell 40; or, multiple The part of the intermediate UE is located in the cell 40, and the other part is located outside the cell 40, which is not limited by the present invention.
  • the UE 20 as the remote UE is not located in the cell where the base station 10 is located, or the UE 20 is not located within the coverage of the base station 10, or the UE 20 is not located within the service range of the base station 10, as described in the embodiment.
  • the meaning is the same.
  • the D2D communication between the UE 20 and the UE 30 shown in FIG. 2(a) belongs to a partial-in-coverage scenario.
  • the UE 20 is spatially located within the cell of the base station 10, the UE 20 and the base station 10 cannot perform normal communication due to other reasons, for example, the UE 20 and the base station. A cellular link failure between 10.
  • the power of the UE 20 is too low.
  • the UE 20 is spatially located within the cell, the signal quality between the UE 20 and the base station 10 is too low (e.g., the UE 20 is in a basement with poor network signal). and many more.
  • the UE 30 can also serve as a relay UE to assist in data transmission between the UE 20 and the base station 10.
  • the UE 20 can send the data directly to the UE 30.
  • the UE 20 may also transmit data indirectly to the UE 30, for example, the UE 20 first transmits data to one or more intermediate UEs (UE 21 shown in Figure 2(b)), and then one or more Intermediate UE Forward to UE 30.
  • the UE 30 may directly transmit data transmitted by the base station 10 to the UE 20, or the UE 30 may also indirectly transmit data transmitted by the base station 10 to the UE 20 through one or more intermediate UEs (e.g., the UE 21).
  • the D2D communication between the UE 20 and the UE 30 shown in FIG. 2(b) belongs to a scene of in-coverage.
  • one or more of the UEs 30 can function as a relay node, such that the direct link between the UE 20 and the base station 10 is at least two links. It should be understood that the relay network is an important direction to meet the increasing demand for high frequency utilization and high data transmission capacity of the communication system.
  • the method of the present invention is described in the manner that only the data transmission between the remote UE and the base station is transmitted through one relay UE.
  • this does not exclude the method in which the remote UE can also relay the data of the remote UE to the base station through relay UEs in multiple networks and/or outside the network.
  • the difference between the two is that the data transmission between the relay UE and the remote UE that finally sends the data to the base station is directly performed, or is relayed through a plurality of other relay UEs.
  • a subsequent embodiment of the present invention specifically describes a method for selecting a relay UE in the application scenario, and further, a method for performing data transmission by relaying the UE.
  • FIG. 3 is a flow diagram of a process of data transmission in accordance with an embodiment of the present invention.
  • the base station 10, the first UE 20, the second UE 31, and the third UE 32 are shown in FIG.
  • the base station 10 can be considered as the base station 10 in FIG. 2; the first UE 20 can be considered as the UE 20 in FIG. 2(a) or FIG. 2(b); the second UE 31 can be regarded as the UE 30 in FIG.
  • One of the third UEs 32 may be considered to be the other of the UEs 30 in FIG.
  • the second UE 31 and the third UE 32 are located in the cell where the base station 10 is located, that is, the base station 10 is the serving base station of the second UE 31 and the third UE 32.
  • the first UE 20 and the second UE 31 can perform D2D communication
  • the first UE 20 and the third UE 32 can perform D2D communication
  • the second UE 31 and the base station 10 can communicate through the cellular link
  • the third UE 32 and base station 10 can communicate over a cellular link.
  • the embodiment of the present invention assumes that the first UE 20 and the base station 10 cannot perform direct data transmission, and the reason that the first UE 20 cannot communicate directly may be that the first UE 20 does not have the condition for direct communication with the base station 10; or The UE 20 needs to communicate with the base station 10 through the relay UE.
  • the first UE 20 is a source UE that needs to send data
  • the second UE 31 is a relay UE
  • the second UE 31 and the base station 10 directly perform data transmission; What is to be realized is a process in which data to be transmitted of the first UE is transmitted to the base station by the second UE.
  • the first UE may send data to be sent to the base station directly by the second UE in a one-hop manner.
  • the first UE may also send the to-be-transmitted data to the second UE by using one or more intermediate UEs, and then the second UE forwards the received data to be sent from the first UE to the base station.
  • the first UE 20 in the embodiment of the present invention is a source UE that needs to send data
  • the second UE 30 is a UE that will directly send data to be sent from the first UE to the base station 10.
  • the method shown in Figure 3 includes:
  • the first UE 20 sends a first message in a D2D format, where the first message includes relay request information.
  • the relay request information may be understood as information requesting to determine (or designate or allocate) the relay UE for the data transmission performed by the first UE 20 and the base station 10. And, the relay request information may be explicitly or implicitly included in the first message.
  • the relay request information may be a field that is explicitly indicated in the first message to indicate the relay request information; or may be a field that implicitly indicates the relay request information; or may be sent together with the first message.
  • the relay request information indicated by the other manner includes any transmission manner of transmitting the first message in a specific manner, for example, the location or range of the time-frequency resource used by the first message, and the scrambling sequence used by the first message.
  • CRC Cyclic Redundancy Check
  • the relay request information may be indicated by a reference signal and/or a D2D synchronization signal. That is, the first message may include a reference signal and/or a D2D synchronization signal for indicating relay request information.
  • the reference signal refers to a signal transmitted by a specific sequence when transmitting, for example, it may be: a reference signal used for positioning, and a demodulation reference signal used for data channel demodulation in D2D transmission.
  • the demodulation reference signal used for demodulation is transmitted on the D2D control channel.
  • the D2D synchronization signal refers to a reference signal for inter-device synchronization of the D2D link transmitted in the D2D link, for example, a primary synchronization signal for D2D, a slave synchronization signal for D2D, and a synchronization signal for D2D communication. , a synchronization signal for D2D discovery.
  • reference signal and/or D2D synchronization signal indication it means that the relay request information is carried by transmitting a specific reference signal and/or a synchronization signal.
  • This particular is embodied in the resources used by these signals, including at least one of the following: using specific time domain resources, specific frequency domain resources, specific code domain resources (reference signal usage sequence Specific cyclic shifts, specific orthogonal masks, specific scrambling sequences, etc.), specific spatial resources (using a specific antenna port or spatial layer).
  • These specific resources may be predefined, or may be configured by signaling of a cellular link or signaling of a D2D link transmission.
  • the form of the first message may be a reference signal and/or a D2D synchronization signal.
  • These reference signals and/or synchronization signals are used to represent the relay request. If a reference signal and/or a D2D synchronization signal is defined, the reference signal and/or the relay request D2D synchronization signal are directly requested for the relay. When the first UE has a relay request, it can directly send this signal.
  • This signal has specific transmission characteristics including: use of specific time domain resources, specific frequency domain resources, specific code domain resources (specific cyclic shifts of reference signal use sequences, specific orthogonal masks, specific additions) Scrambling sequence, etc.), specific airspace resources (using different antenna ports or spatial layers). These specific resources may be predefined, or may be configured by signaling of a cellular link or signaling of a D2D link transmission.
  • the first UE 20 when the first UE 20 is to send uplink data to the base station 10, but the first UE 20 cannot perform direct data transmission with the base station 10, the first UE 20 transmits the first message.
  • the uplink data to be sent by the first UE 20 to the base station 10 may be referred to as data to be relayed.
  • the reason why the first UE 20 cannot perform direct data transmission with the base station 10 is:
  • the base station 10 is the serving base station of the first UE 20, the base station 10 instructs the first UE 20 to communicate with the base station 10 through the relay UE.
  • the base station 10 is the serving base station of the first UE 20, the first UE 20 cannot establish a valid RRC connection with the base station 10.
  • the first UE 20 is outside the service range of the base station 10. In other words, the base station 10 is not the serving base station of the first UE 20.
  • the first UE 20 sends the first message in the form of D2D broadcast, so that the UE capable of D2D communication with the first UE can receive the first message.
  • the first message may include at least one of the following: an identifier of the first UE (Iditity, ID), network status information of the first UE, a destination address of data to be relayed, and the to-be-relayed The size of the data amount of the data, and the quality of service (QoS) type information of the data to be relayed.
  • an identifier of the first UE Iditity, ID
  • network status information of the first UE a destination address of data to be relayed
  • QoS quality of service
  • the network state information of the first UE is used to indicate a network state where the first UE is located, and its network state may be any one of the following: outside the network, within the network, within the network, and capable of establishing an RRC connection.
  • RLF radio link failed
  • the synchronization reference used outside the network is the D2D synchronization source in the network.
  • the network status information of the first UE may indicate that the first UE 20 is outside the service range of the base station 10.
  • the destination address of the data to be relayed may be the base station 10, or the destination address of the data to be relayed may be another base station or another UE in the cell where another base station is located, but the base station needs to be relayed data. 10 forwards. That is, the data to be relayed needs to be transmitted to the base station 10.
  • QCI QoS Class Identifier
  • the second UE 31 and the third UE 32 can receive the first UE 20 The first message sent.
  • the first UE 20 may directly send the first message to the second UE 31 and the third UE 32, or may indirectly transmit to the second UE 31 and the third UE 32, which is not limited by the present invention.
  • the first UE 20 may indirectly transmit the first message to the second UE 31 and the third UE 32 after passing through one or more intermediate UEs.
  • the first message is sent to the second UE 31 as an example.
  • the relay request message may also be understood as: the first UE 20 requests the second UE 31 as the information of its relay UE.
  • the second UE 31 and/or the third UE 32 send a second message to the base station 10, where the second message includes information requesting the relay UE as the first UE to perform data transmission with the base station.
  • the UE that transmits the second message to the base station 10 may also be referred to as a candidate relay UE.
  • the second message includes request information of the relay UE that performs data transmission between the first UE 20 and the base station 10.
  • the second UE 31 has a desire to be a relay UE that performs data transmission between the first UE 20 and the base station 10, then the second UE 31 sends a second message to the base station 10, the second message including its expectation Request information.
  • the second UE 31 may forward the first message to the base station after receiving the first message, and then the forwarded first message may be considered to be 302.
  • the second message That is, the second UE 31 forwards the first message, implicitly including the information requested as the relay UE.
  • the second UE 31 and the third UE 32 can learn the relay request of the first UE 20, and then send the second message to the base station 10.
  • 302 includes: after receiving the first message, the second UE 31 and the third UE 32 determine whether the preset first condition is met. When it is determined that the preset first condition is satisfied, the second message is transmitted to the base station 10.
  • the preset first condition includes at least one of the following: the network status information of the first UE indicates that the first UE cannot directly perform data transmission with the base station, and the second UE and the The signal quality between the base stations is lower than the first threshold and higher than the second threshold, and the received signal quality of the second UE receiving the first message is higher than the third threshold.
  • the preset first condition may be: the network status information of the first UE indicates that the first UE cannot communicate with the base station Direct data transfer.
  • the second UE 31 may first determine the content indicated by the network status information, if the first UE is indicated to be unable to directly connect to the base station. The data transmission is performed, then the second UE 31 can send a second message to the base station 10.
  • the preset first condition may be that a signal quality between the second UE and the base station is lower than a first threshold and higher than a second threshold.
  • the first threshold and the second threshold may be protocol pre-defined, or may be configured by the base station by signaling. It can be understood that the first threshold is greater than the second threshold.
  • the signal quality between the second UE and the base station is lower than a first threshold, indicating that the second UE is located at a cell edge.
  • the signal quality between the second UE and the base station is higher than the second threshold, indicating that the signal quality of the second UE meets the requirements of the communication.
  • the preset first condition may be that the received signal quality of the first UE that receives the first message is higher than a third threshold.
  • the second UE 31 first needs to determine the quality of the received signal when the first message is received, and then judges with the third threshold.
  • the third threshold may be predefined or may be configured by the base station in advance by signaling.
  • the second UE 31 and the third UE 32 can determine whether it can become a candidate relay UE by determining whether the preset first condition is met.
  • the second UE 31 and the third UE 32 may send the second message to the base station 10 according to a preset probability.
  • the second UE 31 and the third UE 32 can determine whether they can become candidate relay UEs by a preset probability.
  • the second message is sent to the base station 10 according to a preset probability.
  • the second UE 31 and the third UE 32 can determine whether it can become a candidate relay UE by determining whether the preset first condition and the preset probability are met.
  • a method for selecting a probability is provided, which can reduce the reporting information to the base station, thereby reducing the workload of the subsequent base station selecting the relaying UE, and further improving the efficiency of selecting the relaying UE.
  • the base station may be pre-configured (such as by a broadcast message or an RRC message) or a predefined probability value Prb. In this way, the second UE 31 and the third UE 32 can transmit the second message according to the probability value Prb.
  • the method of actual judgment may be: the second UE 31 generates a random number in the range of 0 to 100 in an equal probability manner, and if the generated random number is greater than 50, the second UE 31 determines that it transmits the second time. Message, otherwise the second message will not be sent this time.
  • the second message further includes an ID of the second UE 31 to indicate a source address of the second message.
  • the second message may further include an ID of the base station 10 to indicate a destination address of the second message.
  • the second message may further include an ID of the first UE 20 and signal quality information of the first UE.
  • the signal quality information herein can be used by the base station 10 to determine the relay UE.
  • the signal quality information of the first UE is measured by the second UE according to the first message sent by the first UE or the reference signal and/or the D2D synchronization signal sent by the first UE.
  • the information may be at least one of Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), or Received Signal Strength Indication (RSSI).
  • the reference signal may be a demodulation reference signal or some or all of the signals in the D2D synchronization signal.
  • the signal quality information of the first UE included in the second message may be The second UE 31 is acquired from the intermediate UE.
  • the second message may include resource request information of the relay, where the resource is requested for the data to be relayed, so that the base station is the first The two UEs allocate an uplink transmission resource of a suitable size. If the first message includes the QoS type information of the data to be relayed, the second message may include the QoS type information of the data to be relayed, so that the base station considers the corresponding QoS requirement when allocating the uplink sending resource for the second UE. .
  • the second UE 31 and the third UE 32 may start a timer when transmitting the second message.
  • the reply message of the base station 10 is not received within the time set by the timer, it can be considered that the base station 10 does not use it as the relay UE.
  • the second message may be resent, wherein the maximum number of retransmissions may be preset. Or it is configured in advance by the base station 10.
  • the number of UEs that receive the first message is greater than or equal to the number of UEs that send the second message.
  • the base station 10 determines to relay the UE.
  • the base station 10 receives the second message sent by the at least one UE, and selects the relay UE from the at least one UE.
  • the base station 10 selects one or more UEs from at least one candidate relay UE as the relay UE.
  • the base station 10 may determine the relay UE according to the signal quality information between the at least one UE and the base station 10.
  • the base station 10 can determine the UE with the best signal quality information between the base station 10 as the relay UE.
  • the base station 10 may determine the relay UE according to the signal quality information between the at least one UE and the first UE 20.
  • the base station 10 may determine the second UE 31. To relay the UE.
  • the number of relay UEs determined by the base station 10 may be one or multiple. That is, the base station 10 may specify one or more of the at least one UE as the relay UE, which is not limited by the present invention.
  • the relay UE determined by the base station 10 is the second UE 31.
  • the base station 10 sends a third message to the second UE 31, where the third message includes the second UE as the indication information of the relay UE that performs data transmission between the first UE and the base station.
  • the third message indicates the second UE as a relay UE that performs data transmission between the first UE and the base station.
  • base station 10 transmits a third message to the relay UE determined in 303. If a plurality of relay UEs are determined in 303, the base station 10 transmits a third message to the plurality of relay UEs.
  • the third message may further include resource allocation information indicating the relay.
  • the resource allocation information indicating the relay may be indicated by high layer signaling and/or physical layer signaling.
  • the physical layer signaling may include downlink control information (Downlink). Control Indication (DCI), and the DCI may be identified by a Radio Network Temporary Identifier (RNTI) associated with the relay.
  • DCI downlink control information
  • RNTI Radio Network Temporary Identifier
  • the third message as a response to the second message, may be a direct response packet or signaling; or may be an implicit indication signaling, for example, by a new DCI format (eg, using and Followed by the relevant RNTI to do DCI CRC scrambling).
  • timer is started when the second UE 31 sends the second message in 302, it can be understood that 304 means that the second UE 31 receives the third message of the base station 10 within the time set by the timer.
  • the base station 10 may further send a fourth message to the third UE 32, where the fourth message includes indication information that the third UE 32 cannot serve as a relay UE for data transmission between the first UE and the base station. That is, the fourth message indicates that the third UE 32 cannot be a relay UE.
  • the base station 10 may not send any response message to the third UE 32, such that the third UE 32 can also determine that the base station 10 does not use it as a relay UE after the time set by its timer.
  • the second UE 31 can know that the base station 10 has determined it as a relay UE. At this time, optionally, the second UE 31 may perform 305.
  • the second UE 31 sends a fifth message to the first UE 20.
  • the fifth message is a response message of the first message, and the fifth message indicates that the second UE is a relay UE that performs data transmission between the first UE and the base station.
  • the relay UE that the first UE 20 can know the data transmission between it and the base station is the second UE 31.
  • the first UE 20 sends the data to be relayed to the second UE 31.
  • the first UE 20 may transmit the data to be relayed in the form of a D2D broadcast.
  • the UE capable of D2D communication with the first UE 20 can receive, but only the second UE 31 is previously indicated as the relay UE, only the second UE 31 performs 307.
  • the first UE 20 may also send data to be relayed to the second UE 31 by using a D2D link between the first UE 20 and the second UE 31.
  • the plurality of relay UEs receive the data to be relayed sent by the first UE 20.
  • the second UE 31 sends the data to be relayed to the base station 10.
  • the second UE 31 may transmit the data to be relayed according to the resource allocation information indicated by the indication.
  • the destination address of the data to be relayed is another UE in the cell 40 where the base station 10 is located, as shown in FIG. 4, it is assumed to be the UE 33. Then, the base station 10 forwards the data to be relayed to the UE 33. It can be understood that in this scenario, the condition that the UE 33 and the first UE 20 do not satisfy the direct communication cannot perform D2D communication.
  • the base station 10 forwards the data to be relayed to the base station 101.
  • the base station 10 forwards the data to be relayed to the base station 101, and then the base station 101 transmits the data to be relayed to the UE 201.
  • the base station 10 and the base station 101 can be interconnected through an X2 interface, and the base station 10 and the base station 101 can be respectively connected to a Mobility Management Entity (MME) and a service through an S1 interface.
  • MME Mobility Management Entity
  • S-GW Serving GateWay, S-GW
  • the relaying UE is specified by the base station, which can improve the selection efficiency of the relay UE, shorten the time taken for the selection of the relay UE, and reduce unnecessary excessive UEs to participate in the relay. Further, the uplink transmission problem from the first UE to the base station can be solved.
  • the timer may be started, and the specific process may be as shown in FIG. 5.
  • the first UE 20 starts a timer while transmitting the first message.
  • the acknowledgment reply here may be an acknowledgment message for the first message, such as the fifth message of the aforementioned 305. It can be understood that the first UE 20 receives the acknowledgement reply, and it can be known that the relay UE has been determined by the base station.
  • 505 is performed; if 502, the result of the determination is NO, 503 is performed.
  • the duration T1 set by the timer may be predefined, or may be configured by the base station 10 in advance.
  • timer T1 If there is no timeout, continue to wait for a confirmation reply.
  • the duration T2 set by the timer here may be predefined, or it may be that the base station 10 is configured in advance, and T2 is greater than T1.
  • the retransmitted first message may include a number of relay requests.
  • the UE receiving the first message can preferentially process the service with a large number of relay requests.
  • the base station 10 has designated the relay UE, then the first UE 20 may stop the timer and perform the subsequent 306.
  • step 504 is optional, that is, in the step of FIG. 5, it is not necessary to determine the T2 timer, and the process goes directly to step 506.
  • the relay fails may be that the UE receiving the first message cannot be the relay UE, or the first UE 20 may be too far away from the cell where the base station 10 is located, so that no UE can receive the first message.
  • the timer may also be started.
  • the specific process may be as shown in FIG. 6.
  • the reply of the base station 10 may be an acknowledgment reply for the second message, such as the third message in the aforementioned 304.
  • the reply of the base station 10 may also be a negative reply to the second message, such as the fourth message after 304.
  • 605 is performed; if 602, the result of the determination is NO, 603 is performed.
  • the duration T3 set by the timer may be predefined, or may be the base station 10 in advance. Configured.
  • execution 604 If the result of the determination of 603 is YES, then execution 604; if the result of the determination of 603 is no, then return to execution 602.
  • an acknowledgment reply is received in 602, the description can be used as a relay UE. If a negative reply is received in 602, it indicates that it cannot be used as a relay UE; likewise, if 604 has not received a reply by reaching the maximum number of retransmissions, it also indicates that it cannot be used as a relay UE. Then, you can continue to prepare for other remote UEs at this time.
  • FIG. 7 is a flow interaction diagram of a method of data transmission according to another embodiment of the present invention.
  • FIG. 7 shows a base station 10, a first UE 20 and a second UE 31.
  • the method shown in Fig. 7 can be applied to the scene shown in Fig. 2(b) described above.
  • the method shown in Figure 7 includes:
  • the first UE 20 sends a first message to the base station 10, where the first message includes a relay request message of the first UE 20.
  • the relay request information can be understood as the information that the first UE 20 requests the base station 10 to allocate (or determine) the relay UE for the data transmission performed by the first UE 20 and the base station 10. That is to say, it can be understood that the first message includes information requesting to allocate a relay UE for data transmission performed by the first UE and the base station.
  • the first UE 20 may transmit the first message to the base station 10 over the cellular link.
  • the first UE 20 may receive the indication information sent by the base station 10, where the indication information indicates that the first UE 20 needs to perform data transmission with the base station 10 through the relay UE, that is, the base station 10 does not allow the first A UE 20 and the base station 10 directly perform data transmission.
  • the first message herein may include at least one of: an ID of the first UE, a destination address of the data to be relayed, a size of the data amount of the data to be relayed, and the data to be relayed.
  • QoS type information may include at least one of: an ID of the first UE, a destination address of the data to be relayed, a size of the data amount of the data to be relayed, and the data to be relayed.
  • the destination address of the data to be relayed may be the base station 10, or may be other UEs or other base stations.
  • the size of the data volume of the data to be relayed may be used by the base station 10 to allocate an uplink transmission resource of a suitable size.
  • the QoS type information of the data to be relayed may be used when the uplink transmission resource is allocated by the base station 10, and the corresponding QoS requirement is considered.
  • the base station 10 determines to relay the UE.
  • the base station 10 may determine to relay the UE according to the first message.
  • the base station 10 may determine, according to a history message or the like, the source of the first message from the UE in the vicinity of the first UE 20, which is assumed to be at least one UE (for example, the second UE 31 and the third UE 32), that is, the base station 10 may be configured according to The history message determines that at least one UE (the second UE 31 and the third UE 32) is capable of D2D transmission with the first UE 20.
  • the base station 10 may select one or more of the at least one UE as the relay UE.
  • the base station 10 may determine the relay UE according to the signal quality information between the at least one UE and the base station 10.
  • the base station 10 can obtain the signal quality information between the at least one UE and the first UE 20 from the history message, the base station 10 can determine the relay according to the signal quality information between the at least one UE and the first UE 20. UE.
  • the relay UE determined by the base station 10 is the second UE 31.
  • the base station 10 sends a third message to the second UE 31, where the third message includes the second UE as the indication information of the relay UE that performs data transmission between the first UE and the base station.
  • the third message indicates the second UE as a relay UE that performs data transmission between the first UE and the base station.
  • the third message is further Resource allocation information indicating the relay may be included.
  • the resource allocation information indicating the relay may be indicated by high layer signaling and/or physical layer signaling.
  • the physical layer signaling may include DCI) and the DCI may be identified by a RNTI related to a relay.
  • the second UE 31 sends a fifth message to the first UE 20.
  • the first UE 20 sends the data to be relayed to the second UE 31.
  • the second UE 31 sends the data to be relayed to the base station 10.
  • the first UE 20 in 701 can also start a timer when sending the first message.
  • the process shown in FIG. 5 can be similarly referred to. To avoid repetition, details are not described herein again.
  • the process of the method shown in FIG. 3 or FIG. 7 may be adopted, and the second UE is designated as the relay UE by the base station, so that the data sent by the first UE can be implemented.
  • the two UEs are sent to the base station to ensure the transmission of data.
  • FIG. 8 is a flow interaction diagram of a method of data transmission according to another embodiment of the present invention.
  • the base station 10, the first UE 20, the second UE 31, and the third UE 32 are shown in FIG.
  • the base station 10 For descriptions of the base station 10, the first UE 20, the second UE 31, and the third UE 32, refer to the description in FIG. 3 above. To avoid repetition, details are not described herein again.
  • the method shown in Figure 8 includes:
  • the base station 10 sends a first message, where the first message includes relay request information that the base station 10 performs data transmission with the first UE 20.
  • the base station 10 when the base station 10 is to send downlink data to the first UE 20, but because the first UE 20 cannot perform direct data transmission with the base station 10, the base station 10 transmits the first message.
  • the downlink data to be sent by the base station 10 to the first UE 20 may be referred to as data to be relayed.
  • the reason why the first UE 20 cannot perform direct data transmission with the base station 10 is:
  • the base station 10 is the serving base station of the first UE 20, the base station 10 instructs the first UE 20 to communicate with the base station 10 through the relay UE.
  • the base station 10 is the serving base station of the first UE 20, the first UE 20 cannot establish a valid RRC connection with the base station 10.
  • the first UE 20 is outside the service range of the base station 10. In other words, the base station 10 is not the serving base station of the first UE 20.
  • the first message may be sent by the base station 10 through a downlink cellular link.
  • the base station 10 may send the first message in the form of a broadcast, such that all UEs within the service range of the base station 10 can receive the first message.
  • base station 10 can directionally transmit a first message to a plurality of UEs near first UE 20.
  • the base station 10 may first determine the UE in the vicinity of the first UE 20 according to a history message or the like.
  • the first message may include at least one of the following: an ID of the base station, a destination address of the data to be relayed, and resource allocation information indicating a relay.
  • the destination address of the data to be relayed may be the first UE 20.
  • the resource allocation information indicating the relay is indicated by high layer signaling and/or physical layer signaling.
  • the physical layer signaling includes DCI, and the DCI is identified by a RNTI related to a relay.
  • the first message may further include the data volume of the data to be relayed. And/or QoS type information of the data to be relayed, such that the one or more intermediate UEs may be based on the size of the data amount of the data to be relayed and/or the QoS type information of the data to be relayed Determine the transmission resource.
  • the base station 10 can also start a timer when transmitting the first message.
  • the specific process is similar to the process in which the first UE 20 sends the first message start timer in the embodiment of FIG. 3, and the process shown in FIG. 5 can be referred to analogously. To avoid repetition, details are not described herein again.
  • the base station 10 fails to relay, it may be because the first UE 20 is too far away from the cell where the base station 10 is located.
  • the base station 10 directionally transmits the first message to multiple UEs, it may be because the UE selected by the base station 10 is not suitable (for example, the signal quality between the first UE 20 is too poor), at this time, the base station 10 The retransmission of the first message may be performed after the UE to be directionally transmitted is reselected.
  • the second UE 31 and the third UE 32 send a second message to the base station 10.
  • 802 may include: after receiving the first message, the second UE 31 and the third UE 32 determine whether the preset second condition is met. When it is determined that the preset second condition is satisfied, the second message is transmitted to the base station 10.
  • the preset second condition may include: a D2D signal between the second UE and the first UE.
  • the quality is above the fourth threshold.
  • the fourth threshold is predefined or configured by the base station.
  • the second message may include a resource request message for relaying.
  • the second message may further include D2D signal quality information between the second UE 31 and the first UE 20, where the D2D between the second UE 31 and the first UE 20
  • the signal quality information may be determined by the second UE 31 based on the history message.
  • the UE that will transmit the second message to the base station 10 herein is referred to as a candidate relay UE.
  • the second UE 31 and the third UE 32 can determine whether it can be a candidate relay UE by determining whether the preset second condition is met.
  • the second UE 31 and the third UE 32 may also send the second message to the base station 10 according to a preset probability.
  • the second UE 31 and the third UE 32 can determine whether they can become candidate relay UEs by a preset probability.
  • the second UE 31 and the third UE 32 can also start a timer when transmitting the second message.
  • the specific process can refer to the process shown in FIG. 6 analogously. To avoid repetition, details are not described herein again.
  • the base station 10 performs 803.
  • the base station 10 determines to relay the UE.
  • the base station 10 receives the second message sent by the at least one UE, and selects the relay UE from the at least one UE.
  • the base station 10 selects one or more relay UEs from at least one candidate relay UE.
  • the base station 10 may determine the relay UE according to the signal quality information between the at least one UE and the base station 10 and/or the signal quality information between the at least one UE and the first UE 20.
  • the base station 10 can determine the UE with the best signal quality information between the base station 10 as the relay UE.
  • the number of relay UEs determined by the base station 10 may be one or multiple. That is, the base station 10 may specify one or more of the at least one UE as the relay UE, which is not limited by the present invention.
  • the relay UE determined by the base station 10 is the second UE 31.
  • the base station 10 sends a third message to the second UE 31, where the third message includes the second message.
  • the UE serves as the indication information of the relay UE that performs data transmission between the base station 10 and the first UE 20.
  • the third message indicates the second UE as a relay UE that performs data transmission between the base station and the first UE.
  • base station 10 transmits a third message to the relaying UE determined in 803. If a plurality of relay UEs are determined in 803, the base station 10 transmits a third message to the plurality of relay UEs.
  • the third message may further include resource allocation information indicating the relay.
  • the resource allocation information indicating the relay is indicated by high layer signaling and/or physical layer signaling.
  • the physical layer signaling may include a DCI, and the DCI may be identified by a RNTI related to a relay.
  • the base station 10 may further send a fourth message to the third UE 32, where the fourth message includes indication information that the third UE 32 cannot serve as a relay UE. That is, the fourth message indicates that the third UE 32 cannot be the relay UE.
  • base station 10 may not send any response message to third UE 32.
  • the third UE 32 does not receive the response of the base station 10 within the preset time period, that is, the base station 10 does not consider it as the relay UE.
  • the base station 10 sends the data to be relayed to the second UE 31.
  • 804 and 805 can be performed simultaneously. That is, the base station 10 can simultaneously transmit the third message and the data to be relayed to the second UE 31.
  • the data to be relayed sent by the base station 10 may be downlink data generated by the base station 10 itself.
  • the data to be relayed may also be received by the base station 10 from other UEs (e.g., UE 33 in FIG. 4) or from other base stations (e.g., base station 101 in FIG. 4).
  • the invention is not limited thereto.
  • the base station 10 may be the source address of the data to be relayed, or may be an intermediate node in the data forwarding path to be relayed.
  • the second UE 31 sends the data to be relayed to the first UE 20.
  • the second UE 31 sends the data to be relayed by using resource allocation information indicating the relay included in the first message or the third message.
  • the method may further include:
  • the second UE 31 and the third UE 32 send a relay request message to the first UE 20.
  • the second UE 31 and the third UE 32 may adopt a pre-configured D2D resource pool or The D2D resource pool configured by the base station sends the relay request message.
  • the second UE 31 and the third UE 32 may use the same or different D2D resource pools.
  • the second UE 31 can learn from the first message that the destination address of the data to be relayed is the first UE 20, and therefore sends a relay request message to the first UE 20.
  • the relay request message may include all or part of the content in the first message. It should be noted that even if the first message includes resource allocation information indicating the relay, the relay request message does not include resource allocation information indicating the relay.
  • the second UE 31 can directly send the relay request message to the first UE 20; or the second UE 31 can also indirectly forward the relay request message through one or more intermediate UEs. Send to the first UE 20.
  • the second UE 31 and the third UE 32 receive the relay response message sent by the first UE 20.
  • the second UE 31 and the third UE 31 determine, according to the relay response message, whether the preset second condition is met, and when the preset second condition is met, perform 802, that is, send the second to the base station 10. Message.
  • the second UE 31 may determine, according to the transmission quality information of the received relay response message, whether the preset second condition is met.
  • the second message in the 802 may further include the second UE 31 and the first UE 20
  • the D2D signal quality information between the second UE 31 and the first UE 20 herein may be determined by the second UE 31 according to the relay response message.
  • the second UE 31 can obtain the relay response message from the intermediate UE. Signal quality information of the first UE 20.
  • the preset second condition described in 802 may include that the signal quality of the first UE 20 is greater than a fifth threshold.
  • the fifth threshold may be preset or pre-configured by the base station 10.
  • the base station determines the relay UE, which can improve the selection efficiency of the relay UE, shorten the time taken for the selection of the relay UE, and reduce unnecessary excessive UEs to participate in the relay. Further, the problem of downlink transmission from the base station to the first UE can be solved.
  • FIG. 8 or FIG. 9 can be used for the transmission of the downlink data from the base station to the first UE.
  • the flow of the method is as follows: The base station specifies the second UE as the relay UE, so that the data sent by the base station can be sent to the first UE through the second UE, and the data transmission is ensured.
  • the base station 10 may determine, for the first UE 20, that the relay UE is the second UE 31, and the base station 102 may be The first UE 20 determines that the relay UE is the UE 34.
  • the UE 31 and the UE 34 are both relay UEs of the first UE 20, but the serving base stations of the two relay UEs are different, wherein the serving base station of the UE 31 is the base station 10, and the serving base station of the UE 34 is the base station 102.
  • UE 31 and UE 34 may be located in two adjacent cells, respectively.
  • the base station 10 and the base station 101 can be interconnected by using an X2 interface, and the base station 10 and the base station 101 can be respectively connected to the MME/S-GW 70 through the S1 interface.
  • the selection of the relay UE by the base station can avoid the impact on the current cellular link caused by the introduction of the relay UE, and can ensure the quality of service of the entire relay link.
  • FIG. 11 is a flow chart of a method of data transmission in accordance with an embodiment of the present invention.
  • the method shown in Figure 10 is performed by a second UE, including:
  • the second UE receives the first message sent by the first UE or the base station, where the first message includes relay request information.
  • the second UE sends a second message to the base station according to the first message, where the second message includes the second UE requesting to perform data transmission as the first UE and the base station. Following the UE's information.
  • the second UE receives a third message sent by the base station, where the third message indicates the second UE is the relay UE.
  • the second UE is configured as the relay UE by the base station, and the second UE can be enabled to perform data transmission between the base station and the first UE to ensure data transmission efficiency.
  • the base station is a serving base station of the second UE, and the first UE does not directly perform data transmission with the base station.
  • the relay request information may be indicated by a reference signal and/or a D2D synchronization signal.
  • the first UE does not directly perform data transmission with the base station, and includes:
  • the base station is a serving base station of the first UE, but the base station indicates that the first UE needs to communicate with the base station by using a relay UE;
  • the base station is a serving base station of the first UE, but an effective radio link control RRC connection cannot be established between the first UE and the base station;
  • the first UE does not have a communication function of a cellular link and cannot establish a direct connection with the base station.
  • the first message in the 1101 is sent by the first UE by using a D2D link, where the first message further includes at least one of the following: an identifier ID of the first UE, the first The network state information of the UE, the destination address of the data to be relayed, the size of the data amount of the data to be relayed, and the quality of service QoS type information of the data to be relayed.
  • the data to be relayed needs to be sent to the base station.
  • the method 1102 may include: determining, by the second UE, whether the first condition is met according to the first message, and sending a second message to the base station when determining that the preset first condition is met .
  • the preset first condition includes at least one of the following: the network status information of the first UE indicates that the first UE cannot directly perform data transmission with the base station, and the second UE and the The signal quality between the base stations is lower than the first threshold and higher than the second threshold, and the received signal quality of the second UE receiving the first message is higher than the third threshold.
  • one or more of the first threshold, the second threshold, and the third threshold are predefined or configured by signaling.
  • sending the second message to the base station may include: sending the second message to the base station according to a preset probability value.
  • the preset probability value is predefined or configured by the base station.
  • the method for determining, by the second UE, whether to send the second message to the base station according to the preset probability value may be an internally implemented method of the UE.
  • the second UE acquires a preset probability value, such as 0.25, and then generates a random number within 0 to 100 in a locally probabilistic manner. If the generated number is less than or equal to 25, the UE sends a second message. Otherwise, the second message is not transmitted.
  • the second message may include: an ID of the first UE and signal quality information of the first UE.
  • the second message further includes QoS type information of the data to be relayed.
  • the second message is further The resource request information for the relay may be included, and accordingly, the third message in 1103 may further include resource allocation information indicating the relay.
  • the resource allocation information indicating the relay is indicated by high layer signaling and/or physical layer signaling.
  • the physical layer signaling includes downlink control information DCI, and the DCI is identified by a radio network temporary identifier RNTI related to the relay.
  • the resource request information for the relay is resource request information for relaying, and correspondingly, the resource allocation information indicating the relay is information indicating the allocation of the relay resource.
  • the second UE when sending the second message to the base station, the second UE may start a timer.
  • the method 1103 may include: receiving, by the second UE, a third message sent by the base station, within a duration set by the timer.
  • the method further includes: sending, by the second UE, a fourth message to the first UE, where the fourth message indicates that the second UE is a relay UE, and the fourth The message is a response message of the first message.
  • the method may further include: the second UE receives the data to be relayed sent by the first UE; and the second UE sends the data to be relayed to the base station.
  • the second UE can serve as a relay UE to assist in data transmission from the first UE to the base station.
  • the first message in the 1101 is sent by the base station by using a downlink cellular link, where the first message further includes at least one of: an ID of the base station, and the data to be relayed. Destination address and resource allocation information indicating the relay. The destination address of the data to be relayed is the first UE.
  • the resource allocation information indicating the relay is indicated by high layer signaling and/or physical layer signaling.
  • the physical layer signaling may include downlink control information DCI, and the DCI is identified by a radio network temporary identifier RNTI related to the relay.
  • the second UE may determine, according to the first message, whether a preset second condition is met. When determining that the preset second condition is met, sending a second message to the base station.
  • the second condition of the preset includes: a D2D signal quality between the second UE and the first UE is higher than a fourth threshold.
  • the fourth threshold is predefined or configured by the base station.
  • the 1102 may include: the second UE sends a relay request message to the first UE by using a D2D link; the second UE receives a relay response message sent by the first UE; Decoding a response message, determining whether the preset second condition is met; when determining the full condition And when the preset second condition is sufficient, sending a second message to the base station.
  • the relay request message includes at least one of an ID of the base station, an ID of the first UE, a size of a data amount of the data to be relayed, and a QoS type of the data to be relayed. information.
  • the second message includes: D2D signal quality information between the second UE and the first UE.
  • the second UE can obtain the signal quality information of the first UE from the relay response message.
  • the second message may comprise signal quality information of the first UE.
  • the preset second condition may also be that the signal quality information of the first UE is greater than a fifth threshold.
  • the third message further includes the data to be relayed
  • the method further includes: sending, by the second UE, the data to be relayed to the first UE.
  • the method further includes: the second UE receives data to be relayed sent by the base station; and the second UE sends the data to be relayed to the first UE.
  • the second UE is designated as the relay UE by the base station, and the second UE can assist in data transmission between the base station and the first UE, thereby improving the efficiency of data transmission.
  • the processes performed by the second UE in FIG. 11 may refer to the foregoing processes performed by the second UE 31 in FIG. 3 or FIG. 8 or FIG. 9 . To avoid repetition, details are not described herein again.
  • FIG. 12 is a flow chart of a method of data transmission in accordance with another embodiment of the present invention.
  • the method shown in Figure 12 is performed by a base station and includes:
  • the base station receives a first message, where the first message includes information that is requested to allocate a relay UE for data transmission performed by the first UE and the base station.
  • the base station sends a second message to the second UE, where the second message indicates the second UE is the relay UE.
  • the base station specifies the second UE as the relay UE according to the received first message, to assist data transmission between the first UE and the base station.
  • the 1201 includes: the base station receiving the first message from the second UE.
  • the first message includes at least one of: an ID of the first UE, signal quality information of the first UE, a size of a data amount of data to be relayed by the first UE, and the QoS type letter of data to be relayed Information, resource request information for relay, ID of the base station.
  • the second message in 1202 includes resource allocation information indicating the relay.
  • the resource allocation information indicating the relay is indicated by high layer signaling and/or physical layer signaling.
  • the physical layer signaling includes downlink control information DCI, and the DCI is identified by a radio network temporary identifier RNTI related to the relay.
  • the 1201 may include the base station receiving the first message from at least one UE, where the at least one UE includes the second UE and does not include the first UE. Then, after 1201 and before 1202, the base station further includes: determining, by the base station, the second UE in the at least one UE as a relay UE according to at least one of the following: signal quality information between the base station and the base station, Signal quality information with the first UE.
  • the first message in 1201 can be referred to the description of the second message in FIG. 3, and the second message in 1202 can be referred to the description of the third message in FIG. 3, in order to avoid duplication. , no longer repeat them here.
  • the method further includes: the base station sending a third message to a third UE in the at least one UE, where the third message includes the third UE It cannot be used as the indication information of the relay UE of the first UE.
  • the process performed by the base station in FIG. 12 can refer to the foregoing processes performed by the base station 10 in FIG. 3, and details are not described herein again to avoid repetition.
  • the 1201 can include the base station receiving the first message from the first UE.
  • the first message includes at least one of the following: an identifier ID of the first UE, a destination address of data to be relayed, a size of a data amount of the data to be relayed, and data to be relayed. Quality of Service QoS type information.
  • the second message in 1202 may include an indication relay Resource allocation information.
  • the resource allocation information indicating the relay is indicated by high layer signaling and/or physical layer signaling.
  • the physical layer signaling includes DCI, and the DCI is identified by a RNTI related to a relay.
  • the first message in 1201 can refer to the description of the first message in FIG. 7
  • the second message in 1202 can refer to the description of the third message in FIG. 7 . That is to say, 1201 in this embodiment can be referred to as 701 in FIG. 7, and 1202 can be referred to as 703 in FIG. 7. To avoid repetition, details are not described herein again.
  • the process performed by the base station in FIG. 12 can refer to the foregoing processes performed by the base station 10 in FIG. 7. To avoid repetition, details are not described herein again.
  • the method further includes: the base station receiving data to be relayed sent by the second UE, where the first UE to be relayed is sent to the second UE of. That is, the second UE acts as a relay UE, and forwards the data sent by the first UE to the base station.
  • FIG. 13 is a flow chart of a method of data transmission in accordance with another embodiment of the present invention.
  • the method shown in Figure 13 is performed by a base station and includes:
  • the base station sends a first message to the at least one UE, where the first message includes relay request information that the base station performs data transmission with the first UE.
  • the base station receives a second message sent by a part of UEs or all UEs in the at least one UE, where the second message is a response message of the first message, and the part of the UE or all UEs includes a second UE. .
  • the base station sends a third message to the second UE, where the third message indicates that the second UE is a relay UE that performs data transmission between the base station and the first UE.
  • the base station when the data sent by the base station to the first UE needs to be relayed, the base station specifies the second UE as the relay UE, so that the base station can transmit the data to be relayed to the first UE by using the second UE. , thus ensuring the transmission of data.
  • the 1301 includes: when the base station and the first UE cannot directly perform data transmission, the base station sends a first message to the at least one UE.
  • the base station and the first UE cannot directly perform data transmission, including:
  • the base station is a serving base station of the first UE, but the base station indicates that the first UE needs to communicate with the base station by using a relay UE;
  • the base station is a serving base station of the first UE, but an effective radio link control RRC connection cannot be established between the first UE and the base station;
  • the first UE does not have a communication function of a cellular link and cannot establish a direct connection with the base station.
  • the first message is sent by the base station by using a downlink cellular link.
  • the first message is that the base station transmits in the form of a broadcast. That is, in 1201, the base station sends the first message in the form of a broadcast, so that the UEs in the service range of the base station can receive To the first message.
  • the base station may send the first message to a specific at least one UE, for example, to at least one UE in the vicinity of the first UE.
  • the first message further includes at least one of the following: an ID of the base station, a destination address of the data to be relayed, and resource allocation information indicating a relay.
  • the destination address of the data to be relayed is the first UE.
  • the method may further include: determining, by the base station, the second UE of the partial UE or all UEs as a relay UE according to at least one of the following: a signal quality between the base station and the base station Information, signal quality information with the first UE.
  • the second message may include signal quality information of the first UE.
  • the second message may include resource request information for relaying, and the third message includes the resource allocation information indicating the relay.
  • the resource allocation information indicating the relay is indicated by high layer signaling and/or physical layer signaling, where the physical layer signaling includes DCI, and the DCI is identified by a RNTI related to the relay. of.
  • the method further includes: the base station sending a fourth message to the third UE of the partial UE or all UEs, where the fourth message includes the The three UEs cannot be the indication information of the relay UE of the first UE. That is, the fourth message indicates that the third UE cannot be a relay UE.
  • the method further includes: the base station transmitting, to the second UE, data to be relayed, so that the second UE sends the data to be relayed to the first UE.
  • FIG. 14 is a structural block diagram of a user equipment according to an embodiment of the present invention.
  • the user equipment 1400 shown in FIG. 14 is a second UE, and includes a receiving unit 1401 and a sending unit 1402.
  • the receiving unit 1401 is configured to receive a first message sent by the first UE or the base station, where the first message includes relay request information;
  • the sending unit 1402 is configured to send, according to the first message received by the receiving unit 1401, a second message to the base station, where the second message includes the second UE requesting, as the first UE, the base station Information of the relay UE that performs data transmission;
  • the receiving unit 1401 is further configured to receive a third message sent by the base station, where the third message refers to The second UE is shown as the relay UE.
  • the second UE is configured as the relay UE by the base station, and the second UE can be enabled to perform data transmission between the base station and the first UE to ensure data transmission efficiency.
  • the base station is a serving base station of the second UE, and the first UE does not directly perform data transmission with the base station.
  • the relay request information may be indicated by a reference signal and/or a D2D synchronization signal.
  • the first message is sent by the first UE by using a device-to-device D2D link, and the first message further includes at least one of the following:
  • the data to be relayed needs to be sent to the base station.
  • the user equipment 1400 may further include a processing unit 1403, as shown in FIG.
  • the processing unit 1403 is configured to determine, according to the first message, whether a preset first condition is met;
  • the sending unit 1402 is specifically configured to: when the processing unit 1403 determines that the preset first condition is met, send the second message to the base station.
  • the preset first condition includes at least one of the following: the network status information of the first UE indicates that the first UE cannot directly perform data transmission with the base station, and the second UE and the The signal quality between the base stations is lower than the first threshold and higher than the second threshold, and the received signal quality of the second UE receiving the first message is higher than the third threshold;
  • the one or more of the first threshold, the second threshold, and the third threshold are predefined or configured by signaling.
  • the sending unit 1402 is specifically configured to send the second message to the base station according to a preset probability value.
  • the preset probability value is predefined or configured by the base station.
  • the second message further includes: an ID of the first UE and signal quality information of the first UE. If the first message includes QoS type information of the data to be relayed, the second message further includes QoS type information of the data to be relayed.
  • the first message includes a size of a data volume of the data to be relayed
  • the second message includes resource request information for relaying
  • the third message includes resource allocation indicating a relay. information
  • the resource allocation information indicating the relay is indicated by high layer signaling and/or physical layer signaling.
  • the physical layer signaling includes downlink control information DCI, and the DCI is identified by a radio network temporary identifier RNTI related to the relay.
  • DCI downlink control information
  • RNTI radio network temporary identifier
  • the sending unit 1402 is further configured to: send a fourth message to the first UE,
  • the fourth message indicates that the second UE is the relay UE, and the fourth message is a response message of the first message.
  • the first message is sent by the base station by using a downlink cellular link, and the first message further includes at least one of the following:
  • the resource allocation information indicating the relay is indicated by high layer signaling and/or physical layer signaling, where the physical layer signaling includes DCI, and the DCI is determined by a relay related RNTI. To identify.
  • the sending unit 1402 is further configured to send the relay request information to the first UE by using a device-to-device D2D link
  • the receiving unit 1401 is further configured to receive the relay response sent by the first UE. Message.
  • the second message further includes: signal quality information of the first UE.
  • the processing unit 1403 is configured to determine, according to the first message, whether a preset second condition is met.
  • the sending unit 1402 is specifically configured to: when the processing unit 1403 determines that the preset second condition is met, send the second message to the base station.
  • the second condition of the preset includes: a device-to-device D2D signal quality between the second UE and the first UE is higher than a fourth threshold,
  • the fourth threshold is predefined or configured by the base station.
  • the processing unit 1403 is configured to start a timer when the sending unit 1402 sends the second message.
  • the receiving unit 1401 is specifically configured to receive a third message sent by the base station within a duration set by the timer of the processing unit 1403.
  • the base station is a serving base station of the second UE, and the first UE does not directly perform data transmission with the base station;
  • the first UE does not directly perform data transmission with the base station, and includes:
  • the base station is a serving base station of the first UE, but the base station indicates that the first UE needs to communicate with the base station by using a relay UE;
  • the base station is a serving base station of the first UE, but an effective radio link control RRC connection cannot be established between the first UE and the base station;
  • the first UE does not have a communication function of a cellular link, and cannot establish a direct connection with the base station.
  • the user equipment 1400 in FIG. 14 or FIG. 15 can implement the various processes implemented by the second UE in the foregoing embodiments of FIG. 3, FIG. 8, FIG. 9, and FIG. 11. To avoid repetition, details are not described herein again.
  • the receiving unit 1401 may be implemented by a receiver
  • the sending unit 1402 may be implemented by a transmitter
  • the processing unit 1403 may be implemented by a processor.
  • user equipment 1400 can include a processor 1601, a receiver 1602, a transmitter 1603, and a memory 1604.
  • the memory 1604 can be used to store code and the like when the processor 1601 is executed.
  • a bus system 1605 which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • FIG. 17 is a block diagram showing the structure of a base station according to an embodiment of the present invention.
  • the base station 1700 shown in FIG. 17 includes a receiving unit 1701 and a transmitting unit 1702.
  • the receiving unit 1701 is configured to receive a first message, where the first message includes information that is required to allocate a relay UE for data transmission performed by the first UE and the base station;
  • the sending unit 1702 is configured to send a second message to the second UE, where the second message indicates the second UE as the relay UE.
  • the base station specifies the second UE as the relay UE from the multiple UEs that send the first message, to assist data transmission between the first UE and the base station.
  • the receiving unit 1701 is specifically configured to receive the first message from the second UE.
  • the first message includes at least one of the following: an identifier ID of the first UE, signal quality information of the first UE, a data amount of data to be relayed by the first UE, and a size The quality of service QoS type information of the relay data, the resource request information for the relay, and the ID of the base station.
  • the first message includes resource request information for relaying
  • the second message includes resource allocation information indicating a relay.
  • the resource allocation information indicating the relay is indicated by high layer signaling and/or physical layer signaling, where the physical layer signaling includes downlink control information DCI, and the DCI is related to the relay.
  • the wireless network temporarily identifies the RNTI to identify it.
  • the base station 1700 can also include a processing unit 1703, as shown in FIG.
  • the receiving unit 1701 is specifically configured to receive the first message from at least one UE, where the at least one UE includes the second UE and does not include the first UE.
  • the processing unit 1703 is configured to determine, according to at least one of the following, the second UE in the at least one UE as the relay UE: signal quality information between the base station and the first UE Signal quality information between.
  • the sending unit 1702 is further configured to: send, to the third UE in the at least one UE, a third message, where the third message indicates that the third UE cannot be the relay UE.
  • the receiving unit 1701 is specifically configured to: receive the first message from the first UE.
  • the first message includes at least one of the following: an identifier ID of the first UE, a destination address of data to be relayed, a size of a data amount of the data to be relayed, and data to be relayed. Quality of Service QoS type information.
  • the first message includes a size of the data volume of the data to be relayed and/or QoS type information of the data to be relayed
  • the second message includes an indication relay Resource allocation information
  • the resource allocation information indicating the relay is indicated by high layer signaling and/or physical layer signaling, where the physical layer signaling includes downlink control information DCI, and the DCI is related to the relay.
  • the wireless network temporarily identifies the RNTI to identify it.
  • the base station 1700 shown in FIG. 17 or FIG. 18 can implement various processes implemented by the base station in the foregoing embodiments of FIG. 3, FIG. 7, and FIG. 12, and details are not described herein again to avoid repetition.
  • the receiving unit 1701 may be implemented by a receiver
  • the sending unit 1702 may be implemented by a transmitter
  • the processing unit 1703 may be implemented by a processor.
  • the base station 1700 can include a processor 1901, a receiver 1902, a transmitter 1903, and a memory 1904.
  • the memory 1904 can be used to store code and the like when the processor 1901 is executed.
  • bus system 1905 which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • FIG. 20 is a block diagram showing the structure of a base station according to another embodiment of the present invention.
  • Base station 2000 shown in FIG. A transmitting unit 2001 and a receiving unit 2002 are included.
  • the sending unit 2001 is configured to send, to the at least one user equipment UE, a first message, where the first message includes relay request information that the base station performs data transmission with the first UE;
  • the receiving unit 2002 is configured to receive a second message sent by a part of the UE or all the UEs in the at least one UE, where the second message is a response message of the first message, and the part of the UE or all UEs includes a second message.
  • UE
  • the sending unit 2001 is further configured to send a third message to the second UE, where the third message indicates that the second UE is a relay UE that performs data transmission between the base station and the first UE.
  • the base station can enable the relay UE to send the relay data of the base station to the first UE located at the remote end by designating the second UE as the relay UE.
  • the first message is sent by the base station by using a downlink cellular link, and the first message further includes at least one of the following:
  • the base station 2000 can also process the unit 2003, as shown in FIG.
  • the processing unit 2003 is configured to determine, according to at least one of the following, the second UE of the partial UE or all UEs as a relay UE:
  • the second message includes resource request information for relaying, and the third message includes resource allocation information indicating a relay;
  • the resource allocation information indicating the relay is indicated by high layer signaling and/or physical layer signaling.
  • the physical layer signaling includes DCI, and the DCI is identified by a RNTI related to a relay.
  • the sending unit 2002 is further configured to: send a fourth message to the third UE in the partial UE or all UEs, where the fourth message indicates that the third UE cannot serve as a location Said relay UE.
  • the base station is a serving base station of the second UE, and the base station does not directly perform data transmission with the first UE;
  • the base station does not directly perform data transmission with the first UE, and includes:
  • the base station is a serving base station of the first UE, but the base station indicates the first UE Communication with the base station by the relay UE is required;
  • the base station is a serving base station of the first UE, but an effective radio link control RRC connection cannot be established between the first UE and the base station;
  • the first UE does not have a communication function of a cellular link, and cannot establish a direct connection with the base station.
  • the base station 2000 shown in FIG. 20 or FIG. 21 can implement the various processes implemented by the base station in the foregoing embodiments of FIG. 8, FIG. 9, and FIG. 13, and to avoid repetition, details are not described herein again.
  • the receiving unit 2001 may be implemented by a receiver
  • the sending unit 2002 may be implemented by a transmitter
  • the processing unit 2003 may be implemented by a processor.
  • the base station 2000 can include a processor 2201, a receiver 2202, a transmitter 2203, and a memory 2204.
  • the memory 2204 can be used to store code and the like when the processor 2201 is executed.
  • bus system 2205 which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • the processor may be an integrated circuit chip with signal processing capabilities.
  • each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.
  • the memory in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • non-volatile memory can Read-Only Memory (ROM), Programmable Read ROM (PROM), Erasable PROM (EPROM), EEPROM (Electrically Erasable Programmable Read Only Memory) Electrically EPROM, EEPROM) or flash memory.
  • ROM Read-Only Memory
  • PROM Programmable Read ROM
  • EPROM Erasable PROM
  • EEPROM Electrically Erasable Programmable Read Only Memory
  • flash memory Electrically EPROM
  • the volatile memory can be a Random Access Memory (RAM) that acts as an external cache.
  • RAM Random Access Memory
  • many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM).
  • SDRAM Double Data Rate SDRAM
  • DDR SDRAM Double Data Rate SDRAM
  • ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • SLDRAM Synchronous Connection Dynamic Random Access Memory
  • DR RAM direct memory bus random access memory
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. You can choose some of them according to actual needs or All units are used to achieve the objectives of the solution of this embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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Abstract

本发明实施例提出了一种数据传输的方法,包括:第二用户设备UE接收第一UE或基站发送的第一消息,其中,所述第一消息包括中继请求信息;所述第二UE根据所述第一消息,向基站发送第二消息,其中,所述第二消息包括所述第二UE请求作为所述第一UE与所述基站进行数据传输的中继UE的信息;所述第二UE接收所述基站发送的第三消息,所述第三消息指示所述第二UE作为所述中继UE。这样,本发明实施例中,由基站指定第二UE作为中继UE,能够使得第二UE协助进行基站与第一UE之间的数据传输,保证数据传输的效率。

Description

数据传输的方法、用户设备和基站 技术领域
本发明实施例涉及通信领域,并且更具体地,涉及一种数据传输的方法、用户设备和基站。
背景技术
基站与位于其所在的小区内的用户设备(User Equipment,UE)能够通过蜂窝链路进行数据通讯,如图1所示,UE 30位于基站10的小区40中,那么基站10与UE 30通过蜂窝链路进行上下行的数据传输。
但是,由于UE 20处于基站50所在的小区60中,那么,基站10与UE 20之间便不能进行直接数据通讯。基站10与UE 20之间的数据传输需要借助于基站50进行。例如,若UE 20需发送上行数据至基站10,那么,UE 20首先需要先通过蜂窝链路将上行数据发送至基站50,然后再由基站50将上行数据转发至基站10。例如,若基站10需发送下行数据至UE 20,那么,基站10首先需要将下行数据发送至基站50,然后再由基站50将下行数据通过蜂窝链路转发至UE 20。
这样,不仅会造成蜂窝链路的拥塞,而且数据传输的延迟大,导致数据传输的效率低。
发明内容
本发明实施例提供了一种数据传输的方法,能够保证数据传输的效率。
第一方面,提供了一种数据传输的方法,包括:
第二用户设备UE接收第一UE或基站发送的第一消息,其中,所述第一消息包括中继请求信息;
所述第二UE根据所述第一消息,向基站发送第二消息,其中,所述第二消息包括所述第二UE请求作为所述第一UE与所述基站进行数据传输的中继UE的信息;
所述第二UE接收所述基站发送的第三消息,所述第三消息指示所述第二UE作为所述中继UE。
第二方面,提供了一种数据传输的方法,包括:
基站接收第一消息,所述第一消息包括请求为第一UE与所述基站进行的数据传输分配中继UE的信息;
所述基站向第二UE发送第二消息,所述第二消息指示所述第二UE作为所述中继UE。
第三方面,提供了一种数据传输的方法,包括:
基站向至少一个用户设备UE发送第一消息,所述第一消息包括所述基站与第一UE进行数据传输的中继请求信息;
所述基站接收所述至少一个UE中的部分UE或全部UE发送的第二消息,所述第二消息为所述第一消息的响应消息,所述部分UE或全部UE包括第二UE;
所述基站向所述第二UE发送第三消息,所述第三消息指示所述第二UE作为所述基站与所述第一UE进行数据传输的中继UE。
第四方面,提供了一种用户设备,所述用户设备为第二用户设备UE,包括:
接收单元,用于接收第一UE或基站发送的第一消息,其中,所述第一消息包括中继请求信息;
发送单元,用于根据所述接收单元接收到的所述第一消息,向基站发送第二消息,其中,所述第二消息包括所述第二UE请求作为所述第一UE与所述基站进行数据传输的中继UE的信息;
所述接收单元,还用于接收所述基站发送的第三消息,所述第三消息指示所述第二UE作为所述中继UE。
第五方面,提供了一种基站,包括:
接收单元,用于接收第一消息,所述第一消息包括请求为第一UE与所述基站进行的数据传输分配中继UE的信息;
发送单元,用于向第二UE发送第二消息,所述第二消息指示所述第二UE作为所述中继UE。
第六方面,提供了一种基站,包括:
发送单元,用于向至少一个用户设备UE发送第一消息,所述第一消息包括所述基站与第一UE进行数据传输的中继请求信息;
接收单元,用于接收所述至少一个UE中的部分UE或全部UE发送的第二消息,所述第二消息为所述第一消息的响应消息,所述部分UE或全部 UE包括第二UE;
所述发送单元,还用于向所述第二UE发送第三消息,所述第三消息指示所述第二UE作为所述基站与所述第一UE进行数据传输的中继UE。
第七方面,提供了一种用户设备,所述用户设备为第二用户设备UE,包括:
接收器,用于接收第一UE或基站发送的第一消息,其中,所述第一消息包括中继请求信息;
发送器,用于根据所述接收器接收到的所述第一消息,向基站发送第二消息,其中,所述第二消息包括所述第二UE请求作为所述第一UE与所述基站进行数据传输的中继UE的信息;
所述接收器,还用于接收所述基站发送的第三消息,所述第三消息指示所述第二UE作为所述中继UE。
第八方面,提供了一种基站,包括:
接收器,用于接收第一消息,所述第一消息包括请求为第一UE与所述基站进行的数据传输分配中继UE的信息;
发送器,用于向第二UE发送第二消息,所述第二消息指示所述第二UE作为所述中继UE。
第九方面,提供了一种基站,包括:
发送器,用于向至少一个用户设备UE发送第一消息,所述第一消息包括所述基站与第一UE进行数据传输的中继请求信息;
接收器,用于接收所述至少一个UE中的部分UE或全部UE发送的第二消息,所述第二消息为所述第一消息的响应消息,所述部分UE或全部UE包括第二UE;
所述发送器,还用于向所述第二UE发送第三消息,所述第三消息指示所述第二UE作为所述基站与所述第一UE进行数据传输的中继UE。
本发明实施例由基站指定第二UE作为中继UE,能够使得第二UE协助进行基站与第一UE之间的数据传输,这样,能够保证数据传输的效率。
附图说明
为了更清楚地说明本发明实施例的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图 仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。
图1是背景技术描述的场景示意图。
图2是本发明实施例的一个应用场景的示意图。
图3是本发明一个实施例的数据传输的方法的流程交互图。
图4是本发明实施例的另一个应用场景的示意图。
图5是本发明一个实施例的判断中继是否成功的方法的流程图。
图6是本发明一个实施例的判断是否作为中继UE的方法的流程图。
图7是本发明另一个实施例的数据传输的方法的流程交互图。
图8是本发明另一个实施例的数据传输的方法的流程交互图。
图9是本发明另一个实施例的数据传输的方法的流程交互图。
图10是本发明实施例的另一个应用场景的示意图。
图11是本发明一个实施例的数据传输的方法的流程图。
图12是本发明另一个实施例的数据传输的方法的流程图。
图13是本发明另一个实施例的数据传输的方法的流程图。
图14是本发明一个实施例的用户设备的结构框图。
图15是本发明另一个实施例的用户设备的结构框图。
图16是本发明另一个实施例的用户设备的结构框图。
图17是本发明一个实施例的基站的结构框图。
图18是本发明另一个实施例的基站的结构框图。
图19是本发明另一个实施例的基站的结构框图。
图20是本发明另一个实施例的基站的结构框图。
图21是本发明另一个实施例的基站的结构框图。
图22是本发明另一个实施例的基站的结构框图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其他实施例,都属于本发明保护的范围。
应理解,本发明实施例的技术方案可以应用于各种通信系统,例如:全 球移动通讯(Global System of Mobile communication,GSM)系统、码分多址(Code Division Multiple Access,CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统、通用分组无线业务(General Packet Radio Service,GPRS)、长期演进(Long Term Evolution,LTE)系统、LTE频分双工(Frequency Division Duplex,FDD)系统、LTE时分双工(Time Division Duplex,TDD)、通用移动通信系统(Universal Mobile Telecommunication System,UMTS)等。
还应理解,本发明实施例中,基站可以是GSM或CDMA中的基站(Base Transceiver Station,BTS),也可以是WCDMA中的基站(NodeB),还可以是LTE中的演进型基站(Evolutional Node B,eNB或eNodeB),或者是未来5G网络中的基站设备等,本发明对此并不限定。
还应理解,在本发明实施例中,UE可以经无线接入网(Radio Access Network,RAN)与一个或多个核心网(Core Network)进行通信,UE可称为接入终端、终端设备、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。UE可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol,SIP)电话、无线本地环路(Wireless Local Loop,WLL)站、个人数字处理(Personal Digital Assistant,PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备以及未来5G网络中的终端设备等。
用户直联通信是一种直接通信技术。UE之间的数据交互不需要通过基站进行转发。UE之间可以直接进行交互或者在网络的辅助作用下直接进行交互。
用户直联通信有三种工作场景,分别是:网络覆盖、无网络覆盖和部分网络覆盖。在网络覆盖的工作场景中,参与用户直联通信的用户设备都在基站的服务范围内。在无网络覆盖的场景中,参与用户直联通信的用户设备都在基站服务范围外。在部分网络覆盖的场景中,参与用户直联通信的一部分用户设备在基站服务范围内,另一部分用户设备在基站服务范围外。
有关术语的说明:用户直联通信(Device to Device,D2D),是指数据传输时,多个设备间的数据不经过第三个设备而能够直接到达对方的传输。典型的,不同UE之间可以在不经过基站等网络设备的中转下,相互间能够 直接收发。D2D间的链路,在有的地方也被称为边链路(Sidelink),在本发明中,作为一种名字的代称,都使用D2D作为术语,但是这一术语并不限定本发明的方法所使用的范围。
用户直联通信分为设备到设备(Device to Device,D2D)发现(D2D discovery)和D2D通信(D2D communication)。
D2D发现是指用户设备发送发现消息(discovery message),而其他用户设备通过读取该发现消息而获得发送该发现消息的用户设备的信息。该发现消息可以包括发送该发现消息的用户设备的身份信息,例如标识(identity)。
D2D发现分为两种类型(type):类型1(type 1)和类型2(type 2)。类型1是指多个用户设备的用于D2D发现的资源池(该资源池可以称为D2D发现的类型1的资源池)由用户设置自主配置或选择。类型2是指一个用户设备的用于D2D发现的发送资源由基站配置。
D2D通信是指用户设备发送控制信息和数据,而其他用户设备通过读取该控制信息得到后续的数据的发送格式等信息,从而正确接收后续的数据。
D2D通信分为两种模式(mode):模式1(mode 1)和模式2(mode 2)。模式1是指基站或中继(relay)节点调度用户设备用于传输用户直联通信的数据和控制信息的资源。具体地,该控制信息可以是调度分配(Scheduling Assignment,SA)消息。在采用D2D通信的模式1时,基站通过下行信令指示用户设备发送调度分配和数据的资源和格式等。模式2是指用户设备自己从资源池(该资源池可以称为D2D通信的模式2的资源池)中选择用于传输直接通信的数据和SA消息的资源,其中该D2D通信的模式2的资源池可以包括SA消息资源池以及SA消息对应的数据的资源池。换句话说,用户设备可以从SA消息资源池中选择用于传输SA消息的资源,从SA消息对应的数据的资源池中选择用于传输SA消息对应的数据的资源。其中,资源池是指一组通信资源,是多个通信资源组成的一个集合。
图2是本发明实施例的一个应用场景的示意图。具体地,本发明实施例主要用于解决基站10与UE 20之间的数据通讯。另外,图2中还示出了位于基站10所在的小区40内的UE 30。也就是说,基站10为UE 30的服务基站。并且,本发明实施例假设UE 20与UE 30能够进行D2D通信。
本发明实施例中,UE 30能够与基站10直接进行数据传输,UE 20与基站10不直接进行数据传输。这里,UE 20与基站10不直接进行数据传输的 原因可能是客观原因,例如距离太远或信号质量太差等;也可能是主观原因,例如基站10不允许UE 20与基站之间进行数据传输。
其中,如图2(a)所示,UE 20处于基站10的小区40之外,假设UE 20初始位于基站10所在的小区40中,之后由于位置的变化,UE 20移动至小区40外导致无法与基站10进行直接通讯。此时,UE 30可以作为中继UE,协助进行UE 20与基站10之间的数据传输。此种情形下,可将UE 20称为远程UE(remote UE),将作为中继的UE 30称为中继UE(relay UE)。
在此场景中,对于上行数据,UE 20可以将数据直接发送到UE 30。或者,UE 20也可以将数据间接地发送到UE 30,例如,UE 20先将数据发送至一个或多个中间UE(图2(a)中示出的UE 21),再由一个或多个中间UE转发至UE 30。对于下行数据,UE 30可以将基站10发送的数据直接发送到UE 20,或者UE 30也可以通过一个或多个中间UE(例如UE 21)将基站10发送的数据间接发送到UE 20。
应注意,尽管图2(a)中所示出的UE 21位于小区40外,这里所说的一个或多个中间UE可以全部位于小区40外;也可以全部位于小区40内;或者,多个中间UE的部分位于小区40内,另外部分位于小区40外,本发明对此不作限定。
本发明实施例中,作为远端UE的UE 20不位于基站10所在的小区中,或者UE 20不位于基站10的覆盖范围之内,或者UE 20不位于基站10的服务范围之内,所描述的含义都是一致的。
可理解,图2(a)中所示的UE 20与UE 30之间的D2D通信属于部分网络覆盖(partial-in-coverage)的场景。
其中,如图2(b)所示,UE 20虽然在空间上处于基站10的小区之内,但是由于其他的原因而导致了UE 20与基站10无法进行正常的通讯,例如,UE 20与基站10之间的蜂窝链路故障。再例如,UE 20的电量过低。再例如,尽管UE 20在空间上位于小区内部,但是UE 20与基站10之间的信号质量过低(如UE 20在网络信号较差的地下室)。等等。此时,UE 30也可以作为中继UE,协助进行UE 20与基站10之间的数据传输。
在此场景中,对于上行数据,UE 20可以将数据直接发送到UE 30。或者,UE 20也可以将数据间接地发送到UE 30,例如,UE 20先将数据发送至一个或多个中间UE(图2(b)中示出的UE 21),再由一个或多个中间UE 转发至UE 30。对于下行数据,UE 30可以将基站10发送的数据直接发送到UE 20,或者UE 30也可以通过一个或多个中间UE(例如UE 21)将基站10发送的数据间接发送到UE 20。
可理解,图2(b)中所示的UE 20与UE 30之间的D2D通信属于网络覆盖(in-coverage)的场景。
这样,在图2所示的场景中,UE 30中的一个或多个可以作为中继节点,这样,UE 20与基站10直接的链路为至少两条链路。应理解,中继网络是满足通信系统日益增长的高频率利用率和高数据传输能力需求的重要方向。
下面为了说明的方便,本说明书中都以remote UE到基站的数据传输之间只有经过一个relay UE来传输的方式来说明本发明的方法。但是,这并不排除remote UE不也可以经过多个网络内和/或网络外的relay UE来中继remote UE的数据到基站的方法。这两者的区别是,最终发送数据到基站的relay UE和remote UE之间的数据传输是直接进行的,还是经过多个其它的中继UE来中转的。
本发明后续实施例具体描述该应用场景下中继UE的选择的方法,进而通过中继UE进行数据传输的方法。
图3是本发明一个实施例的数据传输的方法的流程交互图。图3中示出了基站10、第一UE 20、第二UE 31和第三UE 32。
其中,基站10可以认为是图2中的基站10;第一UE 20可以认为是图2(a)或图2(b)中的UE 20;第二UE 31可以认为是图2中的UE 30中的一个,第三UE 32可以认为是图2中的UE 30中的另一个。第二UE 31和第三UE32位于基站10所在的小区,即基站10为第二UE 31和第三UE 32的服务基站。并且,第一UE 20与第二UE 31之间可以进行D2D通信,第一UE 20与第三UE 32可以进行D2D通信;第二UE 31与基站10可以通过蜂窝链路进行通信,第三UE 32与基站10可以通过蜂窝链路进行通信。
本发明实施例假设第一UE 20与基站10无法进行直接数据传输,不能直接通信的原因可能是由于第一UE 20不具备与基站10进行直接通信的条件;或者可能是由于网络侧指示第一UE 20需要通过中继UE与基站10进行通信。
需要说明的是:对于上行传输,第一UE 20为需要发送数据的源UE,第二UE 31为中继UE,并且第二UE 31与基站10直接进行数据传输;本发 明要实现的是第一UE的待发送数据通过第二UE向基站发送的过程。可选的,其中第一UE可以按一跳的方式,直接通过第二UE将待发送的数据发送至所述基站。可选的,第一UE也可以将待发送数据发送出去通过一个或多个中间UE后发送至第二UE,第二UE再将接收到的来自第一UE的待发送数据转发至基站。但不论哪种情况,本发明实施例所指的第一UE 20为需要发送数据的源UE,第二UE 30为将收到来自第一UE待发送数据直接发送至基站10的UE。
图3所示的方法包括:
301,第一UE 20以D2D形式发送第一消息,该第一消息包括中继请求信息。
这里,中继请求信息可以理解为是请求为第一UE 20与基站10进行的数据传输确定(或指定或分配)中继UE的信息。并且,中继请求信息可以显式地或者隐式地包含在第一消息中。
所述中继请求信息,可以是第一消息中发送的显式地指示中继请求信息的字段;也可以是隐式地指示中继请求信息的字段;还可以是与第一消息一起发送时用其它方式所隐式指示的中继请求信息。所述用其它方式所指示的中继请求信息,包括任何以特定方式传输第一消息的传输方式,例如:第一消息所使用的时频资源的位置或范围,第一消息使用的加扰序列,第一消息使用的循环冗余校验(Cyclic Redundancy Check,CRC)的掩码,第一消息使用的解调参考信号的序列等。
其中,中继请求信息可以由参考信号和/或D2D同步信号所指示。也就是说,第一消息可以包括参考信号和/或D2D同步信号,用于指示中继请求信息。所述参考信号是指发送时用特定的序列发送的一种信号,例如,它可以为:用于定位的参考信号,用于D2D传输时的数据信道解调时用的解调参考信号,用于D2D控制信道传输解调时用的解调参考信号。D2D同步信号,是指在D2D链路中发送的用于D2D链路设备间同步的参考信号,例如:用于D2D的主同步信号,用于D2D的从同步信号,用于D2D通信的同步信号,用于D2D发现的同步信号。通过参考信号和/或D2D同步信号指示,是指:通过发送特定的参考信号和/或同步信号来携带中继请求信息。这种特定,体现在这些信号使用的资源上,这些资源包括以下中的至少一种:使用特定的时域资源、特定的频域资源、特定的码域资源(参考信号使用序列的 特定的循环移位,特定的正交掩码,特定的加扰序列等)、特定的空域资源(使用特定的天线端口或空间层)。这些特定的资源可以是预定义的,也可以是通过蜂窝链路下发的信令或D2D链路传输的信令配置的。
或者,其中,第一消息的形式可以为参考信号和/或D2D同步信号。即用这些参考信号和/或同步信号来代表中继请求。如定义一种参考信号和/或D2D同步信号,直接为中继请求参考信号和/或中继请求D2D同步信号。第一UE有中继请求时,直接发送这个信号即可。这个信号具有特定的发送特征,这些特征包括:使用特定的时域资源、特定的频域资源、特定的码域资源(参考信号使用序列的特定循环移位,特定正交掩码,特定的加扰序列等)、特定的空域资源(使用不同的天线端口或空间层)。这些特定的资源可以是预定义的,也可以是通过蜂窝链路下发的信令或D2D链路传输的信令配置的。
具体地,当第一UE 20要向基站10发送上行数据,但由于第一UE 20无法与基站10进行直接数据传输时,第一UE 20发送第一消息。其中,可将第一UE 20要向基站10发送的上行数据称为待中继数据。
这里,第一UE 20无法与基站10进行直接数据传输的原因为:
(1).虽然基站10为第一UE 20的服务基站,但是基站10指示第一UE 20需通过中继UE与基站10进行通信。
(2).虽然基站10为第一UE 20的服务基站,但是第一UE 20无法与基站10建立有效的RRC连接。
(3).第一UE 20处于基站10的服务范围之外。换句话说,基站10不是第一UE 20的服务基站。
具体地,第一UE 20以D2D广播的形式发送第一消息,这样,能够与第一UE进行D2D通信的UE能够收到该第一消息。
其中,该第一消息可以包括以下中的至少一个:所述第一UE的标识(Iditity,ID)、所述第一UE的网络状态信息、待中继数据的目的地址、所述待中继数据的数据量的大小、所述待中继数据的服务质量(Quantity of Service,QoS)类型信息。
所述第一UE的网络状态信息用来指示第一UE所处的网络状态,它的网络状态可以是以下中的任意一种:在网络外,在网络内,在网络内并且能够建立RRC连接,在网络内但无线链路失败(RLF),在网络内但被限制或 禁止使用蜂窝链路传输,没有蜂窝链路通信功能或模块,在网络外但使用的同步参考为网络内的D2D同步源。
其中,第一UE的网络状态信息可能指示第一UE 20处于基站10的服务范围之外。
其中,待中继数据的目的地址可能为基站10,或者,待中继数据的目的地址可能为另一基站或为另一基站所在小区内的另一UE,但是该待中继数据需要该基站10转发。也就是说,所述待中继数据需要被发送到基站10。
其中,QoS类型可以参见如下表一所示的QoS类型标识(QoS Class Identifier,QCI)表。
表一
Figure PCTCN2015075922-appb-000001
本发明实施例中,假设第二UE 31和第三UE 32能够接收到第一UE 20 发送的第一消息。
应注意,301中,第一UE 20可以将第一消息直接发送至第二UE 31和第三UE 32,也可以间接地发送至第二UE 31和第三UE 32,本发明对此不作限定。例如,第一UE 20可以通过一个或多个中间UE后,将第一消息间接地发送至第二UE 31和第三UE 32。
可选地,以第一消息发送至第二UE 31为例,中继请求消息也可以理解为是:第一UE 20请求第二UE 31作为其中继UE的信息。
302,第二UE 31和/或第三UE 32向基站10发送第二消息,其中,所述第二消息包括请求作为所述第一UE与所述基站进行数据传输的中继UE的信息。
这里,也可以将向基站10发送第二消息的UE称为候选中继UE,这里,第二消息包括作为所述第一UE 20与所述基站10进行数据传输的中继UE的请求信息。
举例来说,第二UE 31有想要作为第一UE 20与基站10进行数据传输的中继UE的期望,那么,第二UE 31向基站10发送第二消息,该第二消息包括其期望的请求信息。
可选地,作为一个实施例,以第二UE 31为例,第二UE 31在收到第一消息之后,可以将第一消息转发至基站,那么,转发的第一消息可以认为是302中的第二消息。也就是说,第二UE 31转发第一消息,隐式地包括请求作为中继UE的信息。
可选地,作为一个实施例,第二UE 31和第三UE 32在收到第一消息之后,能够获知第一UE 20的中继请求,那么便向基站10发送第二消息。
可选地,作为另一个实施例,302包括:第二UE 31和第三UE 32在收到第一消息后,判断是否满足预设的第一条件。当确定满足预设的第一条件时,向基站10发送第二消息。
其中,所述预设的第一条件包括以下中的至少一个:所述第一UE的网络状态信息指示所述第一UE无法与所述基站直接进行数据传输、所述第二UE与所述基站之间的信号质量低于第一阈值且高于第二阈值、所述第二UE接收所述第一消息的接收信号质量高于第三阈值。
可选地,若第一消息包括第一UE的网络状态信息,那么预设的第一条件可以为:所述第一UE的网络状态信息指示所述第一UE无法与所述基站 直接进行数据传输。以第二UE 31为例,如果第一消息包括第一UE的网络状态信息,那么第二UE 31可以先确定一下该网络状态信息所指示的内容,如果指示第一UE无法与所述基站直接进行数据传输,那么,第二UE 31可以向基站10发送第二消息。
可选地,预设的第一条件可以为:所述第二UE与所述基站之间的信号质量低于第一阈值且高于第二阈值。这里,第一阈值和第二阈值可以是协议预定义的,或者也可以是基站通过信令配置的。可理解,第一阈值大于第二阈值。其中,所述第二UE与所述基站之间的信号质量低于第一阈值说明第二UE位于小区边缘。其中,所述第二UE与所述基站之间的信号质量高于第二阈值说明第二UE的信号质量符合通信的要求。
可选地,预设的第一条件可以为:所述第二UE接收所述第一消息的接收信号质量高于第三阈值。以第二UE 31为例,第二UE 31首先需要确定接收第一消息时的接收信号质量,再与第三阈值进行判断。这里,第三阈值可以是预定义的或者可以是基站通过信令提前配置的。
也就是说,第二UE 31和第三UE 32可以通过判断是否满足预设的第一条件,来确定能否成为候选中继UE。
可选地,作为另一个实施例,第二UE 31和第三UE 32可以按照预设的概率向基站10发送第二消息。
也就是说,第二UE 31和第三UE 32可以通过预设的概率,来确定能否成为候选中继UE。
或者,当确定满足预设的第一条件时,按照预设的概率向基站10发送第二消息。
也就是说,第二UE 31和第三UE 32可以通过判断是否满足预设的第一条件和预设的概率,来确定能否成为候选中继UE。
这样,本发明实施例中,提供概率选择的方法,能够减少向基站的上报信息,进而能够减少后续基站选择中继UE的工作量,进一步提高选择中继UE的效率。
其中,基站可以先预配置(如通过广播消息或RRC消息)或者预定义一个概率值Prb。这样,第二UE 31和第三UE 32可以根据该概率值Prb发送第二消息。
举例来说,如Prb=0.5时,则有50%的概率发送第二消息。以第二UE 31 为例,实际判断的方法可以是:第二UE 31以等概率的方式生成一个0至100内的随机数,如果所生成的随机数大于50,则第二UE 31确定其本次发送第二消息,否则本次不发送第二消息。
再如,如果Prb=0.25,那么第二UE 31以等概率的方式生成一个0至100内的随机数,如果所生成的随机数大于20,则第二UE 31确定其本次可以发送第二消息,否则本次不发送第二消息。
本发明实施例中,所述第二消息还进一步包括第二UE 31的ID,以指示第二消息的源地址。
可选地,第二消息还可以包括基站10的ID,以指示第二消息的目的地址。
可选地,第二消息还可以包括第一UE 20的ID和所述第一UE的信号质量信息。这里的信号质量信息可以由基站10后续用于确定中继UE。
其中,所述第一UE的信号质量信息,是所述第二UE根据接收第一UE发送的第一消息或者所述第一UE发送的参考信号和/或D2D同步信号,来测量得到的第一UE发射信号对应的质量信息。这些信息可以是:参考信号接收功率(Reference Signal Received Power,RSRP),参考信号接收质量(Reference Signal Received Quality,RSRQ)或者接收信号强度指示(Received Signal Strength Indication,RSSI)中的至少一种。所述参考信号,可以是解调参考信号,也可以是D2D同步信号中的部分或全部信号。
可理解,在另一种场景下,如果第一消息是第一UE 20通过一个或多个中间UE发送至第二UE 31的,那么,第二消息包括的第一UE的信号质量信息可以是第二UE 31从中间UE获取的。
可理解,若第一消息包括所述待中继数据的数据量的大小,则第二消息可以包括中继的资源请求信息,用于为所述待中继数据请求传输资源,以便基站为第二UE分配合适大小的上行发送资源。若第一消息包括所述待中继数据的QoS类型信息,则第二消息可以包括所述待中继数据的QoS类型信息,以便基站为第二UE分配上行发送资源时,考虑相应的QoS需求。
可选地,第二UE 31和第三UE 32在发送第二消息时,可以启动定时器。这样,如果在定时器设置的时间内没有收到基站10的回复消息,可以认为基站10没有将其作为中继UE。或者,如果在定时器设置的时间内没有收到基站10的回复消息,可以重发第二消息,其中最大重发次数可以是预设的 或者是由基站10提前配置的。
应注意,本实施例中,接收到第一消息的UE的数量大于或等于发送第二消息的UE的数量。
303,基站10确定中继UE。
可理解,基站10接收到至少一个UE发送的第二消息,并从该至少一个UE中选择中继UE。
可理解,基站10从至少一个候选中继UE中选择一个或多个UE作为中继UE。
具体地,基站10可以根据至少一个UE与基站10之间的信号质量信息,确定中继UE。
例如,基站10可以将与基站10之间的信号质量信息最好的UE确定为中继UE。
或者,若第二消息包括所述第一UE的信号质量信息,那么,基站10可以根据至少一个UE与第一UE 20之间的信号质量信息,确定中继UE。
例如,如果第二UE 31接收第一UE发送的第一消息的信号质量,大于,第三UE 32接收第一UE发送的第一消息的信号质量,那么,基站10可以将第二UE 31确定为中继UE。
应注意,本实施例中,基站10所确定的中继UE的数量可以为一个,也可以为多个。也就是说,基站10可以指定至少一个UE中的一个或多个作为中继UE,本发明对此不作限定。
这里,假设基站10确定的中继UE为第二UE 31。
304,基站10向第二UE 31发送第三消息,该第三消息包括所述第二UE作为所述第一UE与基站之间进行数据传输的中继UE的指示信息。
也就是说,第三消息指示第二UE作为第一UE与基站之间进行数据传输的中继UE。
可理解,基站10向在303中所确定的中继UE发送第三消息。如果在303中确定了多个中继UE,那么,基站10向多个中继UE发送第三消息。
另外,如果第二消息包括中继的资源请求信息,那么,该第三消息还可以包括指示中继的资源分配信息。
可选地,该指示中继的资源分配信息可以是通过高层信令和/或物理层信令进行指示的。其中,所述物理层信令可以包括下行控制信息(Downlink  Control Indication,DCI),并且所述DCI可以是由与中继相关的无线网络临时标识(Radio Network Temporary Identifier,RNTI)来标识的。
应注意,第三消息作为第二消息的响应,可以是直接的响应的数据包或信令;也可以是隐式的指示的信令,例如,通过一种新的DCI格式(如使用与中继有关的RNTI来做DCI的CRC加扰)来指示。
可以理解,如果在302中,第二UE 31发送第二消息时启动了定时器,可以理解,304是指在定时器设定的时间内,第二UE 31收到了基站10的第三消息。
可选地,基站10还可以向第三UE 32发送第四消息,该第四消息包括第三UE 32不能作为第一UE与基站之间的数据传输的中继UE的指示信息。也就是说,第四消息指示第三UE 32不能作为中继UE。
或者,基站10可以不向第三UE 32发送任何响应消息,这样,第三UE32在其定时器设定的时间后,也能确定基站10没有将其作为中继UE。
这样,在接收到第三消息之后,第二UE 31便可知,基站10已将其确定为中继UE。此时,可选地,第二UE 31可以执行305。
305,第二UE 31向第一UE 20发送第五消息。
可理解,该第五消息为第一消息的响应消息,并且第五消息指示所述第二UE作为第一UE与基站之间进行数据传输的中继UE。
这样,第一UE 20便能够知道其与基站之间的数据传输的中继UE是第二UE 31。
306,第一UE 20将待中继数据发送至第二UE 31。
这里,第一UE 20可以以D2D广播的形式发送该待中继数据。尽管与第一UE 20能够进行D2D通信的UE都能够收到,但是之前只有第二UE 31被指示作为中继UE,那么只有第二UE 31执行307。
或者,第一UE 20也可以通过第一UE 20与第二UE 31之间的D2D链路,将待中继数据发送至第二UE 31。
可理解,如果在303中基站10确定的中继UE为多个,那么,在306中多个中继UE都接收第一UE 20发送的待中继数据。
307,第二UE 31将待中继数据发送至基站10。
这里,如果第三消息包括指示中继的资源分配信息,那么第二UE 31可以根据该指示中继的资源分配信息发送该待中继数据。
进一步地,如果该待中继数据的目的地址为基站10所在的小区40中的另一UE,如图4所示,假设为UE 33。那么,基站10将待中继数据转发至UE 33。可理解,在这种场景下,UE 33与第一UE 20之间不满足直连通信的条件,不能进行D2D通信。
或者,进一步地,如果该待中继数据的目的地址为另一基站,如图4中的基站101。那么,基站10将待中继数据转发至基站101。
或者,如果该待中继数据的目的地址为另一小区中的UE,如图4中的UE 201。那么,基站10将待中继数据转发至基站101,再由基站101将待中继数据发送至UE 201。
可理解,本发明实施例中,基站10与基站101之间可以通过X2接口互连,并且,基站10和基站101可以通过S1接口分别连接在移动性管理实体(Mobility Management Entity,MME)和服务网关(Serving GateWay,S-GW)上,本发明对此不作限定。
本发明实施例中,由基站指定中继UE,能够提高中继UE的选择效率,缩短中继UE的选择所花费的时间,减少不必要的过多的UE来参与中继。进一步地,能够解决从第一UE到基站的上行传输问题。
可选地,在301中第一UE 20发送第一消息时,可以启动定时器,具体流程可以如图5所示。
501,发送第一消息。
具体地可以参见301的描述,为避免重复,这里不再赘述。
并且,第一UE 20在发送该第一消息的同时,启动定时器。
502,判断是否收到确认回复。
这里的确认回复可以是针对于第一消息的确认消息,如前述305中的第五消息。可以理解,第一UE 20收到了确认回复,便可知,已经由基站确定了中继UE。
如果502判断的结果为是,则执行505;如果502判断的结果为否,则执行503。
503,判断定时器T1是否超时。
这里定时器设置的时长T1可以是预定义的,或者也可以是基站10提前进行配置的。
如果503判断的结果为否,则返回继续执行502。也就是说,定时器T1 没有超时,则继续等待接收确认回复。
如果503判断的结果为是,则执行504。
504,判断定时器T2是否超时。
这里定时器设置的时长T2可以是预定义的,或者也可以是基站10提前进行配置的,并且T2大于T1。
可以设置T2为T1的整数倍,例如,T2=10×T1。这就相当于中继请求的过程可以尝试10次,每次尝试的时间是T1。
如果504判断的结果为否,则返回继续执行501进行第一消息的重传。可选地,重传的第一消息可以包括中继请求次数。这样,在相同的QoS下,收到第一消息的UE可以优先处理中继请求次数大的业务。
如果504判断的结果为是,则执行506;
505,结束。
此时,基站10已经指定了中继UE,那么,第一UE 20可以停止定时器,并执行后续的306。
506,中继失败。
这里需要说明的是:步骤504中的定时器是可选的,即在图5的步骤中,可以不必判断T2定时器,直接到步骤506。
说明该第一UE 20附近没有合适的UE能够作为中继UE。中继失败的原因可能是收到第一消息的UE都不能够作为中继UE,或者可能是第一UE20距离基站10所在的小区太远导致没有UE能够收到第一消息。
类似地,在302第二UE 31和第三UE 32向基站10发送第二消息时,也可以启动定时器,具体流程可以如图6所示。
601,向基站10发送第二消息。
602,判断是否收到基站10的回复。
基站10的回复可以是针对于第二消息的确认回复,如前述304中的第三消息。基站10的回复也可以是针对于第二消息的否定回复,如前述304之后的第四消息。
如果602判断的结果为是,则执行605;如果602判断的结果为否,则执行603。
603,判断定时器是否超时。
这里定时器设置的时长T3可以是预定义的,或者也可以是基站10提前 进行配置的。
如果603判断的结果为是,则执行604;如果603判断的结果为否,则返回继续执行602。
604,判断是否已经达到最大重传次数。
可以预定义或者由基站10预设置一个最大值作为最大重传次数,如果604判断的结果为是,则执行605;如果604判断的结果为否,则返回继续执行601进行第二消息的重传。
605,结束。即停止定时器。
可理解,如果在602中收到了确认回复,说明能够作为中继UE。如果在602中收到了否定回复,说明不能够作为中继UE;同样地,如果604达到最大重传次数仍然没有收到回复,也说明不能够作为中继UE。那么,此时可以继续为其他的remote UE作中继准备。
可理解,本发明实施例中通过设置定时器,能够解决单次选择失败造成的损失,避免因为一次选择失败的偶然性而导致的整个过程的失败。
图7是本发明另一个实施例的数据传输的方法的流程交互图。图7示出了基站10、第一UE 20和第二UE 31。图7所示的方法可以应用于前述图2(b)所示的场景。图7所示的方法包括:
701,第一UE 20向基站10发送第一消息,所述第一消息包括第一UE 20的中继请求消息。
可理解,中继请求信息可以理解为第一UE 20请求基站10为第一UE 20与基站10进行的数据传输分配(或确定)中继UE的信息。也即是说,可理解为,第一消息包括请求为第一UE与所述基站进行的数据传输分配中继UE的信息。
这里,第一UE 20可以通过蜂窝链路向基站10发送第一消息。
可选地,在701之前,第一UE 20可以接收基站10发送的指示信息,该指示信息指示第一UE 20需经过中继UE与基站10进行数据传输,也就是说,基站10不允许第一UE 20与基站10直接进行数据传输。
具体地,关于该第一消息可以参见前述图3的实施例中关于第一消息的描述,为避免重复,这里不再赘述。
可选地,这里第一消息可以包括以下中的至少一个:第一UE的ID、待中继数据的目的地址、所述待中继数据的数据量的大小、所述待中继数据的 QoS类型信息。
其中,待中继数据的目的地址可以为基站10,或者也可以为其他的UE或其他的基站。
其中,待中继数据的数据量的大小可以用于由基站10分配合适大小的上行发送资源。
其中,待中继数据的QoS类型信息可以用于由基站10分配上行发送资源时,考虑相应的QoS需求。
702,基站10确定中继UE。
具体地,基站10可以根据第一消息确定中继UE。
作为一例,基站10可以根据历史消息等,确定第一消息的来源第一UE20附近的UE,假设为至少一个UE(例如,为第二UE 31和第三UE 32),即,基站10可以根据历史消息确定至少一个UE(第二UE 31和第三UE 32)能够与第一UE 20进行D2D传输。
进一步地,基站10可以从至少一个UE中选择其中的一个或多个作为中继UE。
具体地,基站10可以根据至少一个UE与基站10之间的信号质量信息,确定中继UE。
或者,若基站10能够从历史消息中获取至少一个UE与第一UE 20之间的信号质量信息,那么,基站10可以根据至少一个UE与第一UE 20之间的信号质量信息,确定中继UE。
这里,假设基站10确定的中继UE为第二UE 31。
703,基站10向第二UE 31发送第三消息,该第三消息包括所述第二UE作为所述第一UE与基站之间进行数据传输的中继UE的指示信息。
也就是说,第三消息指示第二UE作为第一UE与基站之间进行数据传输的中继UE。
可选地,若第一消息包括待中继数据的数据量的大小,或者,若第一消息包括待中继数据的数据量的大小和待中继数据的QoS类型信息,那么第三消息还可以包括指示中继的资源分配信息。
可选地,该指示中继的资源分配信息可以是通过高层信令和/或物理层信令进行指示的。其中,所述物理层信令可以包括DCI)并且所述DCI可以是由与中继相关的RNTI来标识的。
704,第二UE 31向第一UE 20发送第五消息。
705,第一UE 20将待中继数据发送至第二UE 31。
706,第二UE 31将待中继数据发送至基站10。
具体地,704可以参见图3的实施例中305的描述,705可以参见图3的实施例中306的描述,706可以参见图3的实施例中307的描述,为避免重复,这里不再赘述。
可理解,701中第一UE 20在发送第一消息时,也可以启动定时器。具体的过程可以类似地参照前述图5所示的过程,为避免重复,这里不再赘述。
可见,对于第一UE至基站的上行数据的传输,可以采用图3或图7所示的方法的流程,由基站指定第二UE作为中继UE,从而能够实现第一UE发送的数据经过第二UE发送至基站,保证了数据的传输。
图8是本发明另一个实施例的数据传输的方法的流程交互图。图8中示出了基站10、第一UE 20、第二UE 31和第三UE 32。
其中,关于基站10、第一UE 20、第二UE 31和第三UE 32的描述可以参见前述图3中的描述,为避免重复,这里不再赘述。
图8所示的方法包括:
801,基站10发送第一消息,该第一消息包括基站10与第一UE 20进行数据传输的中继请求信息。
具体地,当基站10要向第一UE 20发送下行数据,但由于第一UE 20无法与基站10进行直接数据传输时,基站10发送第一消息。其中,可将基站10要向第一UE 20发送的下行数据称为待中继数据。
这里,第一UE 20无法与基站10进行直接数据传输的原因为:
(1).虽然基站10为第一UE 20的服务基站,但是基站10指示第一UE 20需通过中继UE与基站10进行通信。
(2).虽然基站10为第一UE 20的服务基站,但是第一UE 20无法与基站10建立有效的RRC连接。
(3).第一UE 20处于基站10的服务范围之外。换句话说,基站10不是第一UE 20的服务基站。
其中,第一消息可以是基站10通过下行蜂窝链路发送的。
可选地,基站10可以以广播的形式发送第一消息,这样,处于该基站10的服务范围内的所有的UE能够收到该第一消息。
可选地,基站10可以定向地向第一UE 20附近的多个UE发送第一消息。例如,基站10可以先根据历史消息等确定出第一UE 20附近的UE。
其中,该第一消息可以包括以下中的至少一个:所述基站的ID、所述待中继数据的目的地址、指示中继的资源分配信息。
其中,待中继数据的目的地址可以为第一UE 20。
其中,指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的。其中,所述物理层信令包括DCI,并且所述DCI是由与中继相关的RNTI来标识的。
另外,如果第二UE 31与第一UE 20之间需要经过一个或多个中间UE(如图2的场景的相关描述),那么,第一消息还可以包括所述待中继数据的数据量的大小和/或所述待中继数据的QoS类型信息,这样,一个或多个中间UE可以根据所述待中继数据的数据量的大小和/或所述待中继数据的QoS类型信息确定传输资源。
可理解,基站10在发送第一消息时,也可以启动定时器。具体的过程与图3的实施例中第一UE 20发送第一消息启动定时器的过程类似,可以类比地参照前述图5所示的过程,为避免重复,这里不再赘述。
其中,如果基站10中继失败,可能是因为第一UE 20离基站10所在的小区太远。或者,如果基站10将第一消息定向地发送至多个UE,可能是因为基站10所选择发送的UE不合适(例如,与第一UE 20之间的信号质量太差),此时,基站10可以重新选择要定向发送的UE之后再进行第一消息的重发。
802,第二UE 31和第三UE 32向基站10发送第二消息。
可选地,作为一个实施例,802可以包括:第二UE 31和第三UE 32在收到第一消息后,判断是否满足预设的第二条件。当确定满足预设的第二条件时,向基站10发送第二消息。
可理解,若第二UE 31与第一UE 20之间能够直接进行D2D传输,那么,所述预设的第二条件可以包括:所述第二UE与所述第一UE之间的D2D信号质量高于第四阈值。这里,第四阈值是预定义的或者是由所述基站配置的。
可选地,如果第一消息不包括指示中继的资源分配信息,那么,第二消息可以包括用于中继的资源请求消息。
可选地,以第二UE 31为例,第二消息还可以包括第二UE 31与第一UE 20之间的D2D信号质量信息,这里的第二UE 31与第一UE 20之间的D2D信号质量信息可以是第二UE 31根据历史消息确定的。
可理解,与前述图3的实施例中的302类似,这里将向基站10发送第二消息的UE称为候选中继UE。
并且,第二UE 31和第三UE 32可以通过判断是否满足预设的第二条件,来确定是否能够作为候选中继UE。
可选地,第二UE 31和第三UE 32也可以按照预设的概率向基站10发送第二消息。
也就是说,第二UE 31和第三UE 32可以通过预设的概率,来确定能否成为候选中继UE。
具体地,关于预设的概率的描述可以参见前述图3的实施例中302的描述,为避免重复,这里不再赘述。
可理解,第二UE 31和第三UE 32在发送第二消息时,也可以启动定时器。具体的过程可以类比地参照前述图6所示的过程,为避免重复,这里不再赘述。
可理解,802中可能会有多个UE向基站10发送第二消息。因此,基站10执行803。
803,基站10确定中继UE。
可理解,基站10接收到至少一个UE发送的第二消息,并从该至少一个UE中选择中继UE。
可理解,基站10从至少一个候选中继UE中选择一个或多个中继UE。
具体地,基站10可以根据至少一个UE与基站10之间的信号质量信息和/或至少一个UE与第一UE 20之间的信号质量信息,确定中继UE。
例如,基站10可以将与基站10之间的信号质量信息最好的UE确定为中继UE。
应注意,本实施例中,基站10所确定的中继UE的数量可以为一个,也可以为多个。也就是说,基站10可以指定至少一个UE中的一个或多个作为中继UE,本发明对此不作限定。
这里,假设基站10确定的中继UE为第二UE 31。
804,基站10向第二UE 31发送第三消息,该第三消息包括所述第二 UE作为基站10与第一UE 20之间进行数据传输的中继UE的指示信息。
也就是说,第三消息指示第二UE作为基站与第一UE之间进行数据传输的中继UE。
可理解,基站10向在803中所确定的中继UE发送第三消息。如果在803中确定了多个中继UE,那么,基站10向多个中继UE发送第三消息。
另外,如果第二消息包括用于中继的资源请求信息,那么,该第三消息还可以包括指示中继的资源分配信息。
其中,该指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的。其中,所述物理层信令可以包括DCI,并且所述DCI可以是由与中继相关的RNTI来标识的。
可选地,基站10还可以向第三UE 32发送第四消息,该第四消息包括第三UE 32不能作为中继UE的指示信息。也就是说,第四消息指示第三UE 32不能作为所述中继UE。
或者,基站10可以不向第三UE 32发送任何响应消息。这样,第三UE32在预设的时间段内没有收到基站10的响应,即认为基站10没有将其作为中继UE。
805,基站10向第二UE 31发送待中继数据。
可选地,本实施例中,804和805可以同时执行。也就是说,基站10可以同时向第二UE 31发送第三消息和待中继数据。
本发明实施例中,基站10所发送的待中继数据可以是基站10自己生成的下行数据。或者,该待中继数据也可以是基站10从其他的UE(例如,图4中的UE 33)或从其他的基站(例如,图4中的基站101)接收到的。本发明对此不作限定。
也就是说,本发明实施例中,基站10可以是该待中继数据的源地址,也可以该待中继数据转发路径中的一个中间节点。
806,第二UE 31将待中继数据发送至第一UE 20。
具体地,第二UE 31利用第一消息或第三消息所包括的指示中继的资源分配信息,发送该待中继数据。
或者,作为另一个实施例,如图9所示,在801之后,还可以包括:
8011,第二UE 31和第三UE 32向第一UE 20发送中继请求消息。
可选地,第二UE 31和第三UE 32可以采用预配置的D2D资源池或者 基站配置的D2D资源池发送该中继请求消息。
其中,第二UE 31和第三UE 32可以采用相同的或者不同的D2D资源池。
以第二UE 31为例,第二UE 31能够从第一消息获知待中继数据的目的地址为第一UE 20,因此向第一UE 20发送中继请求消息。
其中,所述中继请求消息可以包括第一消息中的全部或部分内容。应注意,即使第一消息包括指示中继的资源分配信息,该中继请求消息不包括指示中继的资源分配信息。
可理解,以第二UE 31为例,第二UE 31可以将中继请求消息直接发送至第一UE 20;或者,第二UE 31也可以通过一个或多个中间UE将中继请求消息间接发送至第一UE 20。
8012,第二UE 31和第三UE 32接收第一UE 20发送的中继响应消息。
可理解,进一步地,第二UE 31和第三UE 31根据中继响应消息判断是否满足预设的第二条件,当满足预设的第二条件时,执行802,即向基站10发送第二消息。
例如,以第二UE 31为例,第二UE 31可以根据接收中继响应消息的发射质量信息判断是否满足预设的第二条件。
相应地,可理解,以第二UE 31为例,若第二UE 31与第一UE 20能够直接进行D2D传输,那么,802中的第二消息还可以包括第二UE 31与第一UE 20之间的D2D信号质量信息,这里的第二UE 31与第一UE 20之间的D2D信号质量信息可以是第二UE 31根据中继响应消息确定的。
可理解,以第二UE 31为例,若第二UE 31与第一UE 20之间通过一个或多个中间UE进行D2D传输,那么,第二UE 31能够通过中间UE从中继响应消息中获取第一UE 20的信号质量信息。
那么,进一步地,802中所述的预设的第二条件可以包括:第一UE 20的信号质量大于第五阈值。第五阈值可以是预设的或者是由基站10预先配置的。
本发明实施例中,由基站确定中继UE,能够提高中继UE的选择效率,缩短中继UE的选择所花费的时间,减少不必要的过多的UE来参与中继。进一步地能够解决基站到第一UE的下行传输的问题。
可见,对于基站至第一UE的下行数据的传输,可以采用图8或图9所 示的方法的流程,由基站指定第二UE作为中继UE,从而能够实现基站发送的数据经过第二UE发送至第一UE,保证了数据的传输。
应注意,本发明实施例中,也可以由不同的基站确定多个中继UE,如图10所示,基站10可以为第一UE 20确定中继UE为第二UE 31,基站102可以为第一UE 20确定中继UE为UE 34。
也就是说,UE 31和UE34都是第一UE 20的中继UE,但是两个中继UE的服务基站不同,其中,UE 31的服务基站为基站10,UE 34的服务基站为基站102。UE 31和UE34可以分别位于两个相邻的小区。
其中,基站10与基站101之间可以通过X2接口互连,并且,基站10和基站101可以通过S1接口分别连接在MME/S-GW 70上。
这样,本发明实施例中,由基站控制中继UE的选择,能够避免由于中继UE的引入而造成的对现行的蜂窝链路的影响,并且能够保证整个中继链路的服务质量。
图11是本发明一个实施例的数据传输的方法的流程图。图10所示的方法由第二UE执行,包括:
1101,第二UE接收第一UE或基站发送的第一消息,其中,所述第一消息包括中继请求信息。
1102,第二UE根据所述第一消息,向所述基站发送第二消息,其中,所述第二消息包括所述第二UE请求作为所述第一UE与所述基站进行数据传输的中继UE的信息。
1103,第二UE接收所述基站发送的第三消息,所述第三消息指示所述第二UE作为所述中继UE。
本发明实施例中,由基站指定第二UE作为中继UE,能够使得第二UE协助进行基站与第一UE之间的数据传输,保证数据传输的效率。
应注意,本发明实施例中,基站为第二UE的服务基站,并且所述第一UE与所述基站不直接进行数据传输。
可选地,作为一个实施例,所述中继请求信息可以由参考信号和/或D2D同步信号所指示。
其中,所述第一UE与所述基站不直接进行数据传输,包括:
所述基站为所述第一UE的服务基站,但是所述基站指示所述第一UE需通过中继UE与所述基站进行通信;
或者,所述基站为所述第一UE的服务基站,但是所述第一UE与所述基站之间无法建立有效的无线链路控制RRC连接;
或者,所述第一UE没有蜂窝链路的通信功能,无法与所述基站建立直接的连接。
可选地,1101中的所述第一消息为所述第一UE通过D2D链路发送的,所述第一消息还包括以下中的至少一个:所述第一UE的标识ID、所述第一UE的网络状态信息、待中继数据的目的地址、所述待中继数据的数据量的大小、所述待中继数据的服务质量QoS类型信息。其中,所述待中继数据需要被发送到所述基站。
相应地,1102可以包括:所述第二UE根据所述第一消息,判断是否满足预设的第一条件;当确定满足所述预设的第一条件时,向所述基站发送第二消息。
其中,所述预设的第一条件包括以下中的至少一个:所述第一UE的网络状态信息指示所述第一UE无法与所述基站直接进行数据传输、所述第二UE与所述基站之间的信号质量低于第一阈值且高于第二阈值、所述第二UE接收所述第一消息的接收信号质量高于第三阈值。
这里,所述第一阈值、所述第二阈值和所述第三阈值中的一个或多个是预定义的或者通过信令配置的。
可选地,向所述基站发送第二消息,可以包括:按照预设的概率值向所述基站发送所述第二消息。其中,所述预设的概率值是预定义的或者是由所述基站配置的。
可选地,第二UE按上述预设的概率值,判断是否向基站发送第二消息的方法,可以是UE的一种内部实现的方法。例如:第二UE获取预设的概率值,如0.25,然后在本地按等概率的方式生成一个0到100以内的随机数,如果这个生成的数小于或等于25,则UE就发送第二消息,否则不发射第二消息。
本发明实施例中,所述第二消息可以包括:所述第一UE的ID和所述第一UE的信号质量信息。
若所述第一消息包括所述待中继数据的QoS类型信息,则所述第二消息还包括所述待中继数据的QoS类型信息。
另外,若第一消息包括所述待中继数据的数据量的大小,则第二消息还 可包括用于中继的资源请求信息,相应地,1103中的第三消息还可以包括指示中继的资源分配信息。
其中,所述指示中继的资源分配信息,是通过高层信令和/或物理层信令进行指示的。其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
其中,用于中继的资源请求信息是用于中继的资源请求信息,相应地,指示中继的资源分配信息是指示中继资源分配的信息。
可选地,在向所述基站发送第二消息时,所述第二UE可以启动定时器。相应地,1103可以包括:所述第二UE在所述定时器设置的时长内,接收所述基站发送的第三消息。
可选地,在1103之后,还可以包括:所述第二UE向所述第一UE发送第四消息,其中,所述第四消息指示所述第二UE作为中继UE,所述第四消息为所述第一消息的响应消息。
在1103之后,还可以包括:所述第二UE接收所述第一UE发送的待中继数据;所述第二UE将所述待中继数据发送至所述基站。
这样,第二UE能够作为中继UE,协助进行第一UE至基站的数据传输。
可选地,1101中的所述第一消息为所述基站通过下行蜂窝链路发送的,所述第一消息还包括以下中的至少一个:所述基站的ID、所述待中继数据的目的地址和指示中继的资源分配信息。其中,所述待中继数据的目的地址为所述第一UE。
其中,指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的。其中,所述物理层信令可以包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
1102可以包括:所述第二UE根据所述第一消息,判断是否满足预设的第二条件;当确定满足所述预设的第二条件时,向所述基站发送第二消息。
其中,所述预设的第二条件包括:所述第二UE与所述第一UE之间的D2D信号质量高于第四阈值。这里,所述第四阈值是预定义的或者是由所述基站配置的。
1102可以包括:所述第二UE通过D2D链路向所述第一UE发送中继请求消息;所述第二UE接收所述第一UE发送的中继响应消息;所述第二UE根据所述中继响应消息,判断是否满足所述预设的第二条件;当确定满 足所述预设的第二条件时,向所述基站发送第二消息。
其中,所述中继请求消息包括以下中的至少一个:所述基站的ID、所述第一UE的ID、所述待中继数据的数据量的大小、所述待中继数据的QoS类型信息。
相应地,所述第二消息包括:所述第二UE与所述第一UE之间的D2D信号质量信息。
可选地,若第二UE与第一UE之间通过一个或多个中间UE进行传输,那么,第二UE能够从中继响应消息获取第一UE的信号质量信息。相应地,第二消息可以包括第一UE的信号质量信息。预设的第二条件也可以为第一UE的信号质量信息大于第五阈值。
可选地,所述第三消息还包括所述待中继数据,所述方法还包括:所述第二UE将所述待中继数据发送至所述第一UE。
或者,可选地,所述方法还包括:所述第二UE接收所述基站发送的待中继数据;所述第二UE将所述待中继数据发送至所述第一UE。
这样,本发明实施例中,通过基站指定第二UE作为中继UE,第二UE能够协助进行基站与第一UE之间的数据传输,进而能够提高数据传输的效率。
应注意,图11中第二UE执行的过程,可以参见前述图3或图8或图9中由第二UE 31执行的各个过程,为避免重复,这里不再赘述。
图12是本发明另一个实施例的数据传输的方法的流程图。图12所示的方法由基站执行,包括:
1201,基站接收第一消息,所述第一消息包括请求为第一UE与所述基站进行的数据传输分配中继UE的信息。
1202,所述基站向第二UE发送第二消息,所述第二消息指示所述第二UE作为所述中继UE。
本发明实施例中,基站根据接收到的第一消息,指定第二UE作为中继UE,以协助第一UE与基站之间的数据传输。
可选地,作为一个实施例,
1201包括:基站从所述第二UE接收第一消息。其中,所述第一消息包括以下中的至少一个:所述第一UE的ID、所述第一UE的信号质量信息、所述第一UE的待中继数据的数据量的大小、所述待中继数据的QoS类型信 息、用于中继的资源请求信息、所述基站的ID。
可理解,如果第一消息包括用于中继的资源请求信息,那么1202中的第二消息包括指示中继的资源分配信息。所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的。其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
可选地,1201中可包括所述基站从至少一个UE接收所述第一消息,其中,所述至少一个UE包括所述第二UE且不包括所述第一UE。那么,在1201之后且在1202之前还包括:所述基站根据以下中的至少一个信息将所述至少一个UE中的第二UE确定为中继UE:与所述基站之间的信号质量信息、与所述第一UE之间的信号质量信息。
可理解,在本实施例中,1201中的第一消息可以参见前述图3中的第二消息的描述,1202中的第二消息可以参见前述图3中的第三消息的描述,为避免重复,这里不再赘述。
可选地,在1202之前或之后,或者与1202同时地,还可包括:所述基站向所述至少一个UE中的第三UE发送第三消息,所述第三消息包括所述第三UE不能作为所述第一UE的中继UE的指示信息。
应注意,本实施例中,图12中基站执行的过程,可以参见前述图3中由基站10执行的各个过程,为避免重复,这里不再赘述。
可选地,作为另一个实施例,
1201可包括:所述基站从所述第一UE接收所述第一消息。其中,所述第一消息包括以下中的至少一个:所述第一UE的标识ID、待中继数据的目的地址、所述待中继数据的数据量的大小、所述待中继数据的服务质量QoS类型信息。
可理解,若所述第一消息包括所述待中继数据的数据量的大小和/或所述待中继数据的QoS类型信息,那么,1202中的所述第二消息可包括指示中继的资源分配信息。所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的。其中,所述物理层信令包括DCI,并且所述DCI是由与中继相关的RNTI来标识的。
可理解,在本实施例中,1201中的第一消息可以参见前述图7中的第一消息的描述,1202中的第二消息可以参见前述图7中的第三消息的描述;也 就是说,本实施例中的1201可以参见图7中的701,1202可以参见图7中的703,为避免重复,这里不再赘述。
应注意,本实施例中,图12中基站执行的过程,可以参见前述图7中由基站10执行的各个过程,为避免重复,这里不再赘述。
这样,在图12所示的方法之后,还可以进一步包括:所述基站接收所述第二UE发送的待中继数据,所述待中继数据所述第一UE发送至所述第二UE的。即,第二UE作为中继UE,将第一UE发送的数据转发至基站。
图13是本发明另一个实施例的数据传输的方法的流程图。图13所示的方法由基站执行,包括:
1301,基站向至少一个UE发送第一消息,所述第一消息包括所述基站与第一UE进行数据传输的中继请求信息。
1302,所述基站接收所述至少一个UE中的部分UE或全部UE发送的第二消息,所述第二消息为所述第一消息的响应消息,所述部分UE或全部UE包括第二UE。
1303,所述基站向所述第二UE发送第三消息,所述第三消息指示所述第二UE作为所述基站与所述第一UE进行数据传输的中继UE。
本发明实施例中,当基站向第一UE发送的数据需要进行中继时,由基站指定第二UE作为中继UE,这样,基站能够通过第二UE将待中继数据传输至第一UE,从而保证了数据的传输。
可选地,1301包括:当所述基站与所述第一UE无法直接进行数据传输时,所述基站向至少一个UE发送第一消息。
其中,所述基站与所述第一UE无法直接进行数据传输,包括:
所述基站为所述第一UE的服务基站,但是所述基站指示所述第一UE需通过中继UE与所述基站进行通信;
或者,所述基站为所述第一UE的服务基站,但是所述第一UE与所述基站之间无法建立有效的无线链路控制RRC连接;
或者,所述第一UE没有蜂窝链路的通信功能,无法与所述基站建立直接的连接。
其中,第一消息为所述基站通过下行蜂窝链路发送的。
可选地,第一消息是所述基站以广播的形式发送的。即1201中,基站以广播的形式发送第一消息,这样,处于基站的服务范围内的UE都可以收 到第一消息。
可选地,在1301中,基站可以将第一消息发送至特定的至少一个UE,例如,发送至第一UE附近的至少一个UE。
其中,所述第一消息还包括以下中的至少一个:所述基站的ID、所述待中继数据的目的地址和指示中继的资源分配信息。其中,所述待中继数据的目的地址为第一UE。
可选地,在1303之前,还可以包括:所述基站根据以下中的至少一个信息将所述部分UE或全部UE中的第二UE确定为中继UE:与所述基站之间的信号质量信息、与所述第一UE之间的信号质量信息。
其中,第二消息可以包括第一UE的信号质量信息。
可选地,若第一消息不包括指示中继的资源分配信息,那么第二消息可以包括用于中继的资源请求信息,所述第三消息包括所述指示中继的资源分配信息。所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的,其中,所述物理层信令包括DCI,并且所述DCI是由与中继相关的RNTI来标识的。
可选地,在1303之前或之后,或者与1303同时地,还可包括:所述基站向所述部分UE或全部UE中的第三UE发送第四消息,所述第四消息包括所述第三UE不能作为所述第一UE的中继UE的指示信息。也就是说,第四消息指示第三UE不能作为中继UE。
进一步地,在804之后,还可包括:所述基站将待中继数据发送至所述第二UE,以使所述第二UE将所述待中继数据发送至所述第一UE。
应注意,图13中基站执行的过程,可以参见前述图8或图9中由基站10执行的各个过程,为避免重复,这里不再赘述。
图14是本发明一个实施例的用户设备的结构框图。图14所示的用户设备1400为第二UE,包括接收单元1401和发送单元1402。
接收单元1401,用于接收第一UE或基站发送的第一消息,其中,所述第一消息包括中继请求信息;
发送单元1402,用于根据接收单元1401接收到的所述第一消息,向基站发送第二消息,其中,所述第二消息包括所述第二UE请求作为所述第一UE与所述基站进行数据传输的中继UE的信息;
接收单元1401,还用于接收所述基站发送的第三消息,所述第三消息指 示所述第二UE作为所述中继UE。
本发明实施例中,由基站指定第二UE作为中继UE,能够使得第二UE协助进行基站与第一UE之间的数据传输,保证数据传输的效率。
应注意,本发明实施例中,基站为第二UE的服务基站,并且所述第一UE与所述基站不直接进行数据传输。
可选地,作为一个实施例,所述中继请求信息可以由参考信号和/或D2D同步信号所指示。
可选地,作为一个实施例,
所述第一消息为所述第一UE通过设备到设备D2D链路发送的,所述第一消息还包括以下中的至少一个:
所述第一UE的标识ID、所述第一UE的网络状态信息、待中继数据的目的地址、所述待中继数据的数据量的大小、所述待中继数据的服务质量QoS类型信息;
其中,所述待中继数据需要被发送到所述基站。
可选地,用户设备1400还可包括处理单元1403,如图15所示,
处理单元1403,用于根据所述第一消息,判断是否满足预设的第一条件;
发送单元1402,具体用于当处理单元1403确定满足所述预设的第一条件时,向所述基站发送第二消息。
其中,所述预设的第一条件包括以下中的至少一个:所述第一UE的网络状态信息指示所述第一UE无法与所述基站直接进行数据传输、所述第二UE与所述基站之间的信号质量低于第一阈值且高于第二阈值、所述第二UE接收所述第一消息的接收信号质量高于第三阈值;
其中,所述第一阈值、所述第二阈值和所述第三阈值中的一个或多个是预定义的或者通过信令配置的。
可选地,发送单元1402,具体用于按照预设的概率值向所述基站发送所述第二消息。其中,所述预设的概率值是预定义的或者是由所述基站配置的。
可选地,所述第二消息还包括:所述第一UE的ID和所述第一UE的信号质量信息。若所述第一消息包括所述待中继数据的QoS类型信息,则所述第二消息还包括所述待中继数据的QoS类型信息。
可选地,所述第一消息包括所述待中继数据的数据量的大小,所述第二消息包括用于中继的资源请求信息,所述第三消息包括指示中继的资源分配 信息;
所述指示中继的资源分配信息,是通过高层信令和/或物理层信令进行指示的,
其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
可选地,发送单元1402,还用于:向所述第一UE发送第四消息,
其中,所述第四消息指示所述第二UE作为所述中继UE,所述第四消息为所述第一消息的响应消息。
可选地,作为另一个实施例,
所述第一消息为所述基站通过下行蜂窝链路发送的,所述第一消息还包括以下中的至少一个:
所述基站的标识ID、所述待中继数据的目的地址和指示中继的资源分配信息;其中,所述待中继数据的目的地址为所述第一UE。
其中,所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的,其中,所述物理层信令包括DCI,并且所述DCI是由与中继相关的RNTI来标识的。
可选地,发送单元1402,还用于通过设备到设备D2D链路向所述第一UE发送所述中继请求信息;接收单元1401,还用于接收所述第一UE发送的中继响应消息。
可选地,所述第二消息还包括:所述第一UE的信号质量信息。
可选地,处理单元1403,用于根据所述第一消息,判断是否满足预设的第二条件。发送单元1402,具体用于当处理单元1403确定满足所述预设的第二条件时,向所述基站发送第二消息。
其中,所述预设的第二条件包括:所述第二UE与所述第一UE之间的设备到设备D2D信号质量高于第四阈值,
其中,所述第四阈值是预定义的或者是由所述基站配置的。
可选地,处理单元1403,用于在发送单元1402发送第二消息时,启动定时器。接收单元1401,具体用于在处理单元1403的所述定时器设置的时长内,接收所述基站发送的第三消息。
可选地,作为另一个实施例,所述基站为所述第二UE的服务基站,并且所述第一UE与所述基站不直接进行数据传输;
其中,所述第一UE与所述基站不直接进行数据传输,包括:
所述基站为所述第一UE的服务基站,但是所述基站指示所述第一UE需通过中继UE与所述基站进行通信;
或者,
所述基站为所述第一UE的服务基站,但是所述第一UE与所述基站之间无法建立有效的无线链路控制RRC连接;
或者,
所述第一UE没有蜂窝链路的通信功能,无法与所述基站建立直接的连接。
图14或图15中的用户设备1400能够实现前述图3、图8、图9和图11的实施例中由第二UE所实现的各个过程,为避免重复,这里不再赘述。
应注意,本发明实施例中,接收单元1401可以由接收器实现,发送单元1402可以由发送器实现,处理单元1403可以由处理器实现。如图16所示,用户设备1400可以包括处理器1601、接收器1602、发送器1603和存储器1604。其中,存储器1604可以用于存储处理器1601执行时的代码等。
用户设备1400中的各个组件通过总线系统1605耦合在一起,其中总线系统1605除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。
图17是本发明一个实施例的基站的结构框图。图17所示的基站1700包括接收单元1701和发送单元1702。
接收单元1701,用于接收第一消息,所述第一消息包括请求为第一UE与所述基站进行的数据传输分配中继UE的信息;
发送单元1702,用于向第二UE发送第二消息,所述第二消息指示所述第二UE作为所述中继UE。
本发明实施例中,基站从发送第一消息的多个UE中指定第二UE作为中继UE,以协助第一UE与基站之间的数据传输。
可选地,作为一个实施例,接收单元1701,具体用于从所述第二UE接收所述第一消息。其中,所述第一消息包括下中的至少一个:所述第一UE的标识ID、所述第一UE的信号质量信息、所述第一UE的待中继数据的数据量的大小、所述待中继数据的服务质量QoS类型信息、用于中继的资源请求信息、所述基站的ID。
可选地,所述第一消息包括用于中继的资源请求信息,所述第二消息包括指示中继的资源分配信息。所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的,其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
可选地,基站1700还可包括处理单元1703,如图18所示。接收单元1701,具体用于从至少一个UE接收所述第一消息,其中,所述至少一个UE包括所述第二UE且不包括所述第一UE。处理单元1703,用于根据以下中的至少一个信息将所述至少一个UE中的第二UE确定为所述中继UE:与所述基站之间的信号质量信息、与所述第一UE之间的信号质量信息。
可选地,发送单元1702,还用于:向所述至少一个UE中的第三UE发送第三消息,所述第三消息指示所述第三UE不能作为所述中继UE。
可选地,作为另一个实施例,
接收单元1701,具体用于:从所述第一UE接收所述第一消息。
其中,所述第一消息包括以下中的至少一个:所述第一UE的标识ID、待中继数据的目的地址、所述待中继数据的数据量的大小、所述待中继数据的服务质量QoS类型信息。
可选地,本发明实施例中,所述第一消息包括所述待中继数据的数据量的大小和/或所述待中继数据的QoS类型信息,所述第二消息包括指示中继的资源分配信息。
所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的,其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
图17或图18所示的基站1700能够实现前述图3、图7和图12的实施例中由基站所实现的各个过程,为避免重复,这里不再赘述。
应注意,本发明实施例中,接收单元1701可以由接收器实现,发送单元1702可以由发送器实现,处理单元1703可以由处理器实现。如图19所示,基站1700可以包括处理器1901、接收器1902、发送器1903和存储器1904。其中,存储器1904可以用于存储处理器1901执行时的代码等。
基站1700中的各个组件通过总线系统1905耦合在一起,其中总线系统1905除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。
图20是本发明另一个实施例的基站的结构框图。图20所示的基站2000 包括发送单元2001和接收单元2002。
发送单元2001,用于向至少一个用户设备UE发送第一消息,所述第一消息包括所述基站与第一UE进行数据传输的中继请求信息;
接收单元2002,用于接收所述至少一个UE中的部分UE或全部UE发送的第二消息,所述第二消息为所述第一消息的响应消息,所述部分UE或全部UE包括第二UE;
发送单元2001,还用于向所述第二UE发送第三消息,所述第三消息指示所述第二UE作为所述基站与所述第一UE进行数据传输的中继UE。
本发明实施例中,基站通过指定第二UE作为中继UE,能够使中继UE协助将基站的中继数据发送至位于远端的第一UE。
可选地,本发明实施例中,所述第一消息是所述基站通过下行蜂窝链路发送的,所述第一消息还包括以下中的至少一个:
所述基站的标识ID、所述待中继数据的目的地址和指示中继的资源分配信息;其中,所述待中继数据的目的地址为第一UE。
可选地,作为一个实施例,基站2000还可以处理单元2003,如图21所示。处理单元2003,用于根据以下中的至少一个信息将所述部分UE或全部UE中的第二UE确定为中继UE:
与所述基站之间的信号质量信息、与所述第一UE之间的信号质量信息。
可选地,作为另一个实施例,所述第二消息包括用于中继的资源请求信息,所述第三消息包括指示中继的资源分配信息;
所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的,
其中,所述物理层信令包括DCI,并且所述DCI是由与中继相关的RNTI来标识的。
可选地,作为另一个实施例,发送单元2002,还用于:向所述部分UE或全部UE中的第三UE发送第四消息,所述第四消息指示所述第三UE不能作为所述中继UE。
可选地,作为另一个实施例,所述基站为所述第二UE的服务基站,并且所述基站与所述第一UE不直接进行数据传输;
其中,所述基站与所述第一UE不直接进行数据传输,包括:
所述基站为所述第一UE的服务基站,但是所述基站指示所述第一UE 需通过中继UE与所述基站进行通信;
或者,
所述基站为所述第一UE的服务基站,但是所述第一UE与所述基站之间无法建立有效的无线链路控制RRC连接;
或者,
所述第一UE没有蜂窝链路的通信功能,无法与所述基站建立直接的连接。
图20或图21所示的基站2000能够实现前述图8、图9和图13的实施例中由基站所实现的各个过程,为避免重复,这里不再赘述。
应注意,本发明实施例中,接收单元2001可以由接收器实现,发送单元2002可以由发送器实现,处理单元2003可以由处理器实现。如图22所示,基站2000可以包括处理器2201、接收器2202、发送器2203和存储器2204。其中,存储器2204可以用于存储处理器2201执行时的代码等。
基站2000中的各个组件通过总线系统2205耦合在一起,其中总线系统2205除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。
应注意,本发明上述方法实施例可以应用于处理器中,或者由处理器实现。处理器可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器,处理器读取存储器中的信息,结合其硬件完成上述方法的步骤。
可以理解,本发明实施例中的存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以 是只读存储器(Read-Only Memory,ROM)、可编程只读存储器(Programmable ROM,PROM)、可擦除可编程只读存储器(Erasable PROM,EPROM)、电可擦除可编程只读存储器(Electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(Static RAM,SRAM)、动态随机存取存储器(Dynamic RAM,DRAM)、同步动态随机存取存储器(Synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM,DR RAM)。应注意,本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或 者全部单元来实现本实施例方案的目的。
另外,在本发明各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。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或者该技术方案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中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以权利要求的保护范围为准。

Claims (54)

  1. 一种数据传输的方法,其特征在于,包括:
    第二用户设备UE接收第一UE或基站发送的第一消息,其中,所述第一消息包括中继请求信息;
    第二UE根据所述第一消息,向基站发送第二消息,其中,所述第二消息包括所述第二UE请求作为所述第一UE与所述基站进行数据传输的中继UE的信息;
    所述第二UE接收所述基站发送的第三消息,所述第三消息指示所述第二UE作为所述中继UE。
  2. 根据权利要求1所述的方法,其特征在于,所述中继请求信息由参考信号和/或设备到设备D2D同步信号所指示。
  3. 根据权利要求1所述的方法,其特征在于,所述第一消息为所述第一UE通过设备到设备D2D链路发送的,所述第一消息还包括以下中的至少一个:
    所述第一UE的标识ID、所述第一UE的网络状态信息、待中继数据的目的地址、所述待中继数据的数据量的大小、所述待中继数据的服务质量QoS类型信息;
    其中,所述待中继数据需要被发送到所述基站。
  4. 根据权利要求3所述的方法,其特征在于,所述第二UE根据所述第一消息,向所述基站发送第二消息,包括:
    所述第二UE根据所述第一消息,判断是否满足预设的第一条件;
    当确定满足所述预设的第一条件时,向所述基站发送第二消息;
    其中,所述预设的第一条件包括以下中的至少一个:
    所述第一UE的网络状态信息指示所述第一UE无法与所述基站直接进行数据传输、所述第二UE与所述基站之间的信号质量低于第一阈值且高于第二阈值、所述第二UE接收所述第一消息的接收信号质量高于第三阈值。
  5. 根据权利要求4所述的方法,其特征在于,所述向所述基站发送第二消息,包括:
    根据预设的概率值向所述基站发送所述第二消息;
    其中,所述预设的概率值是预定义的或者是由所述基站配置的。
  6. 根据权利要求3至5任一项所述的方法,其特征在于,所述第二消 息还包括:所述第一UE的ID和所述第一UE的信号质量信息;
    若所述第一消息包括所述待中继数据的QoS类型信息,则所述第二消息还包括所述待中继数据的QoS类型信息。
  7. 根据权利要求3至6任一项所述的方法,其特征在于,所述第一消息包括所述待中继数据的数据量的大小,所述第二消息包括用于中继的资源请求信息,所述第三消息包括指示中继的资源分配信息;
    所述指示中继的资源分配信息,是通过高层信令和/或物理层信令进行指示的,
    其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
  8. 根据权利要求3至7任一项所述的方法,其特征在于,所述方法还包括:
    所述第二UE向所述第一UE发送第四消息,
    其中,所述第四消息指示所述第二UE作为所述中继UE,所述第四消息为所述第一消息的响应消息。
  9. 根据权利要求1所述的方法,其特征在于,所述第一消息为所述基站通过下行蜂窝链路发送的,所述第一消息还包括以下中的至少一个:
    所述基站的标识ID、所述待中继数据的目的地址和指示中继的资源分配信息;
    其中,所述待中继数据的目的地址为所述第一UE。
  10. 根据权利要求9所述的方法,其特征在于,在所述第二用户设备UE接收所述基站发送的第一消息之后,还包括:
    所述第二UE通过设备到设备D2D链路向所述第一UE发送所述中继请求信息;
    所述第二UE接收所述第一UE发送的中继响应消息。
  11. 根据权利要求10所述的方法,其特征在于,所述第二消息还包括:所述第一UE的信号质量信息。
  12. 根据权利要求9至11任一项所述的方法,其特征在于,所述第二UE根据所述第一消息,向所述基站发送第二消息,包括:
    所述第二UE根据所述第一消息,判断是否满足预设的第二条件;
    当确定满足所述预设的第二条件时,向所述基站发送第二消息;
    其中,所述预设的第二条件包括:所述第二UE与所述第一UE之间的设备到设备D2D信号质量高于第四阈值,
    其中,所述第四阈值是预定义的或者是由所述基站配置的。
  13. 根据权利要求1至12任一项所述的方法,其特征在于,在所述向所述基站发送第二消息时,所述第二UE启动定时器,
    所述第二UE接收所述基站发送的第三消息,包括:
    所述第二UE在所述定时器设置的时长内,接收所述基站发送的第三消息。
  14. 根据权利要求1至13任一项所述的方法,其特征在于,所述基站为所述第二UE的服务基站,并且所述第一UE与所述基站不直接进行数据传输;
    其中,所述第一UE与所述基站不直接进行数据传输,包括:
    所述基站为所述第一UE的服务基站,但是所述基站指示所述第一UE需通过中继UE与所述基站进行通信;
    或者,
    所述基站为所述第一UE的服务基站,但是所述第一UE与所述基站之间无法建立有效的无线链路控制RRC连接;
    或者,
    所述第一UE没有蜂窝链路的通信功能,无法与所述基站建立直接的连接。
  15. 一种数据传输的方法,其特征在于,包括:
    基站接收第一消息,所述第一消息包括请求为第一UE与所述基站进行的数据传输分配中继UE的信息;
    所述基站向第二UE发送第二消息,所述第二消息指示所述第二UE作为所述中继UE。
  16. 根据权利要求15所述的方法,其特征在于,所述基站接收第一消息,包括:
    所述基站从所述第二UE接收所述第一消息;
    其中,所述第一消息包括以下中的至少一个:所述第一UE的标识ID、所述第一UE的信号质量信息、所述第一UE的待中继数据的数据量的大小、所述待中继数据的服务质量QoS类型信息、用于中继的资源请求信息、所述 基站的ID。
  17. 根据权利要求16所述的方法,其特征在于,所述第一消息包括用于中继的资源请求信息,所述第二消息包括指示中继的资源分配信息;
    所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的,
    其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
  18. 根据权利要求16或17所述的方法,其特征在于,
    所述基站从所述第二UE接收所述第一消息,包括:
    所述基站从至少一个UE接收所述第一消息,其中,所述至少一个UE包括所述第二UE且不包括所述第一UE;
    在所述基站向第二UE发送第二消息之前,还包括:
    所述基站根据以下中的至少一个信息将所述至少一个UE中的第二UE确定为所述中继UE:
    与所述基站之间的信号质量信息、与所述第一UE之间的信号质量信息。
  19. 根据权利要求18所述的方法,其特征在于,所述方法还包括:
    所述基站向所述至少一个UE中的第三UE发送第三消息,所述第三消息指示所述第三UE不能作为所述中继UE。
  20. 根据权利要求15所述的方法,其特征在于,所述基站接收第一消息,包括:
    所述基站从所述第一UE接收所述第一消息;
    其中,所述第一消息包括以下中的至少一个:所述第一UE的标识ID、待中继数据的目的地址、所述待中继数据的数据量的大小、所述待中继数据的服务质量QoS类型信息。
  21. 根据权利要求15至20任一项所述方法,其特征在于,所述第一消息包括所述待中继数据的数据量的大小和/或所述待中继数据的QoS类型信息,所述第二消息包括指示中继的资源分配信息;
    所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的,
    其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
  22. 一种数据传输的方法,其特征在于,所述方法包括:
    基站向至少一个用户设备UE发送第一消息,所述第一消息包括所述基站与第一UE进行数据传输的中继请求信息;
    所述基站接收所述至少一个UE中的部分UE或全部UE发送的第二消息,所述第二消息为所述第一消息的响应消息,所述部分UE或全部UE包括第二UE;
    所述基站向所述第二UE发送第三消息,所述第三消息指示所述第二UE作为所述基站与所述第一UE进行数据传输的中继UE。
  23. 根据权利要求22所述的方法,其特征在于,所述第一消息还包括以下中的至少一个:
    所述基站的标识ID、所述待中继数据的目的地址和指示中继的资源分配信息;
    其中,所述待中继数据的目的地址为所述第一UE。
  24. 根据权利要求22或23所述的方法,其特征在于,在所述基站向所述第二UE发送第三消息之前,还包括:
    所述基站根据以下中的至少一个信息将所述部分UE或全部UE中的第二UE确定为中继UE:
    与所述基站之间的信号质量信息、与所述第一UE之间的信号质量信息。
  25. 根据权利要求22至24任一项所述的方法,其特征在于,所述第二消息包括用于中继的资源请求信息,所述第三消息包括指示中继的资源分配信息;
    所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的,
    其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
  26. 根据权利要求22至25任一项所述的方法,其特征在于,所述方法还包括:
    所述基站向所述部分UE或全部UE中的第三UE发送第四消息,所述第四消息指示所述第三UE不能作为所述中继UE。
  27. 根据权利要求22至26任一项所述的方法,其特征在于,所述基站为所述第二UE的服务基站,并且所述基站与所述第一UE不直接进行数据 传输;
    其中,所述基站与所述第一UE不直接进行数据传输,包括:
    所述基站为所述第一UE的服务基站,但是所述基站指示所述第一UE需通过中继UE与所述基站进行通信;
    或者,
    所述基站为所述第一UE的服务基站,但是所述第一UE与所述基站之间无法建立有效的无线链路控制RRC连接;
    或者,
    所述第一UE没有蜂窝链路的通信功能,无法与所述基站建立直接的连接。
  28. 一种用户设备,其特征在于,所述用户设备为第二用户设备UE,包括:
    接收单元,用于接收第一UE或基站发送的第一消息,其中,所述第一消息包括中继请求信息;
    发送单元,用于根据所述接收单元接收到的所述第一消息,向基站发送第二消息,其中,所述第二消息包括所述第二UE请求作为所述第一UE与所述基站进行数据传输的中继UE的信息;
    所述接收单元,还用于接收所述基站发送的第三消息,所述第三消息指示所述第二UE作为所述中继UE。
  29. 根据权利要求28所述的用户设备,其特征在于,所述中继请求信息由参考信号和/或设备到设备D2D同步信号所指示。
  30. 根据权利要求28所述的用户设备,其特征在于,所述第一消息为所述第一UE通过设备到设备D2D链路发送的,所述第一消息还包括以下中的至少一个:
    所述第一UE的标识ID、所述第一UE的网络状态信息、待中继数据的目的地址、所述待中继数据的数据量的大小、所述待中继数据的服务质量QoS类型信息;
    其中,所述待中继数据需要被发送到所述基站。
  31. 根据权利要求30所述的用户设备,其特征在于,还包括处理单元,
    所述处理单元,用于根据所述第一消息,判断是否满足预设的第一条件;
    所述发送单元,具体用于当所述处理单元确定满足所述预设的第一条件 时,向所述基站发送第二消息;
    其中,所述预设的第一条件包括以下中的至少一个:
    所述第一UE的网络状态信息指示所述第一UE无法与所述基站直接进行数据传输、所述第二UE与所述基站之间的信号质量低于第一阈值且高于第二阈值、所述第二UE接收所述第一消息的接收信号质量高于第三阈值。
  32. 根据权利要求31所述的用户设备,其特征在于,所述发送单元,具体用于根据预设的概率值向所述基站发送所述第二消息;
    其中,所述预设的概率值是预定义的或者是由所述基站配置的。
  33. 根据权利要求30至32任一项所述的用户设备,其特征在于,所述第二消息还包括:所述第一UE的ID和所述第一UE的信号质量信息;
    若所述第一消息包括所述待中继数据的QoS类型信息,则所述第二消息还包括所述待中继数据的QoS类型信息。
  34. 根据权利要求30至33任一项所述的用户设备,其特征在于,所述第一消息包括所述待中继数据的数据量的大小,所述第二消息包括用于中继的资源请求信息,所述第三消息包括指示中继的资源分配信息;
    所述指示中继的资源分配信息,是通过高层信令和/或物理层信令进行指示的,
    其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
  35. 根据权利要求30至34任一项所述的用户设备,其特征在于,所述发送单元,还用于:向所述第一UE发送第四消息,
    其中,所述第四消息指示所述第二UE作为所述中继UE,所述第四消息为所述第一消息的响应消息。
  36. 根据权利要求28所述的用户设备,其特征在于,所述第一消息为所述基站通过下行蜂窝链路发送的,所述第一消息还包括以下中的至少一个:
    所述基站的标识ID、所述待中继数据的目的地址和指示中继的资源分配信息;
    其中,所述待中继数据的目的地址为所述第一UE。
  37. 根据权利要求36所述的用户设备,其特征在于,
    所述发送单元,还用于通过设备到设备D2D链路向所述第一UE发送所 述中继请求信息;
    所述接收单元,还用于接收所述第一UE发送的中继响应消息。
  38. 根据权利要求37所述的用户设备,其特征在于,所述第二消息还包括:所述第一UE的信号质量信息。
  39. 根据权利要求36至38任一项所述的用户设备,其特征在于,还包括处理单元,
    所述处理单元,用于根据所述第一消息,判断是否满足预设的第二条件;
    所述发送单元,具体用于当确定满足所述预设的第二条件时,向所述基站发送第二消息;
    其中,所述预设的第二条件包括:所述第二UE与所述第一UE之间的设备到设备D2D信号质量高于第四阈值,
    其中,所述第四阈值是预定义的或者是由所述基站配置的。
  40. 根据权利要求28至39任一项所述的用户设备,其特征在于,还包括处理单元,
    所述处理单元,用于在所述发送单元发送第二消息时,启动定时器;
    所述接收单元,具体用于在所述处理单元的所述定时器设置的时长内,接收所述基站发送的第三消息。
  41. 根据权利要求28至40任一项所述的用户设备,其特征在于,所述基站为所述第二UE的服务基站,并且所述第一UE与所述基站不直接进行数据传输;
    其中,所述第一UE与所述基站不直接进行数据传输,包括:
    所述基站为所述第一UE的服务基站,但是所述基站指示所述第一UE需通过中继UE与所述基站进行通信;
    或者,
    所述基站为所述第一UE的服务基站,但是所述第一UE与所述基站之间无法建立有效的无线链路控制RRC连接;
    或者,
    所述第一UE没有蜂窝链路的通信功能,无法与所述基站建立直接的连接。
  42. 一种基站,其特征在于,包括:
    接收单元,用于接收第一消息,所述第一消息包括请求为第一UE与所 述基站进行的数据传输分配中继UE的信息;
    发送单元,用于向第二UE发送第二消息,所述第二消息指示所述第二UE作为所述中继UE。
  43. 根据权利要求42所述的基站,其特征在于,
    所述接收单元,具体用于从所述第二UE接收所述第一消息;
    其中,所述第一消息包括下中的至少一个:所述第一UE的标识ID、所述第一UE的信号质量信息、所述第一UE的待中继数据的数据量的大小、所述待中继数据的服务质量QoS类型信息、用于中继的资源请求信息、所述基站的ID。
  44. 根据权利要求43所述的基站,其特征在于,所述第一消息包括用于中继的资源请求信息,所述第二消息包括指示中继的资源分配信息;
    所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的,
    其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
  45. 根据权利要求43所述的基站,其特征在于,还包括处理单元,
    所述接收单元,具体用于从至少一个UE接收所述第一消息,其中,所述至少一个UE包括所述第二UE且不包括所述第一UE;
    所述处理单元,用于根据以下中的至少一个信息将所述至少一个UE中的第二UE确定为所述中继UE:
    与所述基站之间的信号质量信息、与所述第一UE之间的信号质量信息。
  46. 根据权利要求45所述的基站,其特征在于,所述发送单元,还用于:
    向所述至少一个UE中的第三UE发送第三消息,所述第三消息指示所述第三UE不能作为所述中继UE。
  47. 根据权利要求42所述的基站,其特征在于,
    所述接收单元,具体用于从所述第一UE接收所述第一消息;
    其中,所述第一消息包括以下中的至少一个:所述第一UE的标识ID、待中继数据的目的地址、所述待中继数据的数据量的大小、所述待中继数据的服务质量QoS类型信息。
  48. 根据权利要求42至47所述的基站,其特征在于,所述第一消息包 括所述待中继数据的数据量的大小和/或所述待中继数据的QoS类型信息,所述第二消息包括指示中继的资源分配信息;
    所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的,
    其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
  49. 一种基站,其特征在于,包括:
    发送单元,用于向至少一个用户设备UE发送第一消息,所述第一消息包括所述基站与第一UE进行数据传输的中继请求信息;
    接收单元,用于接收所述至少一个UE中的部分UE或全部UE发送的第二消息,所述第二消息为所述第一消息的响应消息,所述部分UE或全部UE包括第二UE;
    所述发送单元,还用于向所述第二UE发送第三消息,所述第三消息指示所述第二UE作为所述基站与所述第一UE进行数据传输的中继UE。
  50. 根据权利要求49所述的基站,其特征在于,所述第一消息还包括以下中的至少一个:
    所述基站的标识ID、所述待中继数据的目的地址和指示中继的资源分配信息;
    其中,所述待中继数据的目的地址为第一UE。
  51. 根据权利要求49或50所述的基站,其特征在于,还包括处理单元,
    所述处理单元,用于根据以下中的至少一个信息将所述部分UE或全部UE中的第二UE确定为中继UE:
    与所述基站之间的信号质量信息、与所述第一UE之间的信号质量信息。
  52. 根据权利要求49至51任一项所述的基站,其特征在于,所述第二消息包括用于中继的资源请求信息,所述第三消息包括指示中继的资源分配信息;
    所述指示中继的资源分配信息是通过高层信令和/或物理层信令进行指示的,
    其中,所述物理层信令包括下行控制信息DCI,并且所述DCI是由与中继相关的无线网络临时标识RNTI来标识的。
  53. 根据权利要求49至52任一项所述的基站,其特征在于,所述发送 单元,还用于:
    向所述部分UE或全部UE中的第三UE发送第四消息,所述第四消息指示所述第三UE不能作为所述中继UE。
  54. 根据权利要求49至53任一项所述的基站,其特征在于,所述基站为所述第二UE的服务基站,并且所述基站与所述第一UE不直接进行数据传输;
    其中,所述基站与所述第一UE不直接进行数据传输,包括:
    所述基站为所述第一UE的服务基站,但是所述基站指示所述第一UE需通过中继UE与所述基站进行通信;
    或者,
    所述基站为所述第一UE的服务基站,但是所述第一UE与所述基站之间无法建立有效的无线链路控制RRC连接;
    或者,
    所述第一UE没有蜂窝链路的通信功能,无法与所述基站建立直接的连接。
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US20180027475A1 (en) 2018-01-25
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