WO2014176972A1 - D2d通信中的数据发送方法和设备 - Google Patents
D2d通信中的数据发送方法和设备 Download PDFInfo
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- WO2014176972A1 WO2014176972A1 PCT/CN2014/075383 CN2014075383W WO2014176972A1 WO 2014176972 A1 WO2014176972 A1 WO 2014176972A1 CN 2014075383 W CN2014075383 W CN 2014075383W WO 2014176972 A1 WO2014176972 A1 WO 2014176972A1
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- resource
- data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
Definitions
- D2D Device-to-Device
- N2D link Network-to-device link
- uplink carrier Frequency Division Duplex (FDD) system
- uplink subframe Time Division Duplex (TDD) system
- downlink carrier FDD system
- the consideration of the downlink subframe is as follows: For the downlink subframe/downlink carrier, the following occurs, the D2D terminal needs to receive the data transmitted on the N2D link of the base station side (including at least the physical downlink control channel).
- the cell-specific reference signals (CRS) are demodulated to obtain better PDCCH demodulation performance, and then the D2D link transmission can be used in the downlink/downlink carrier in consideration of the time of transmission and reception conversion.
- the OFDM symbols are relatively small. Therefore, the uplink subframe/uplink carrier is used as a resource for D2D data transmission.
- the uplink carrier is used as the resource for D2D data transmission, and the D2D terminal can simultaneously perform the service and control of receiving the N2D link in the downlink carrier, and can simultaneously communicate on the D2D link.
- the network side semi-statically configures a shared time-frequency resource for D2D communication (D2D link) for a pair/group D2D terminal, which may be a subframe (time) Domain) + physical resource block (PRB)
- D2D link a shared time-frequency resource for D2D communication
- PRB physical resource block
- a data transmission method in D2D communication comprising:
- the network side device receives a resource occupation request for the D2D communication resource sent by the at least one D2D terminal, where the at least one D2D terminal is a D2D terminal that shares the D2D communication resource;
- the network side device sends the indication signaling to the D2D terminal that can use the D2D communication resource to transmit data, to indicate that the D2D terminal sends data on the D2D communication resource.
- the resource occupation request sent by each D2D terminal includes:
- the network side device determines, according to the resource occupation request, a D2D terminal that can occupy the data sent by the D2D communication resource in the at least one D2D terminal, and specifically includes:
- the network side device receives the resource occupation request sent by the D2D terminal, determining that the D2D terminal that sends the resource occupation request is a D2D terminal that can occupy the data sent by the D2D communication resource; If the network side device receives the resource occupation request sent by the multiple D2D terminals, determining, according to the principle that the terminal polls the occupied resources, a D2D terminal that can occupy the data sent by the D2D communication resource in the multiple D2D terminals, or according to The received resource occupation request determines the service requirement of each D2D terminal, and determines a D2D terminal that can occupy the D2D communication resource transmission data among the plurality of D2D terminals according to the service requirement of each D2D terminal.
- the network side device sends the indication signaling to the D2D terminal that can use the D2D communication resource to send data, to indicate that the D2D terminal sends data on the D2D communication resource, which specifically includes:
- the network side device sends the indication signaling to the D2D terminal that can use the D2D communication resource to send data on the subframe nk, to indicate that the D2D terminal sends data on the subframe n; wherein the subframe n is the D2D
- the sub-frame included in the communication resource, k is an integer not less than 1, and the value of k satisfies the following condition:
- the time length of the k sub-frames is greater than the preset D2D transmission pre-processing time.
- the time for the D2D transmission pre-processing includes: a detection time of the indication signaling by the D2D terminal, a time of conversion of the D2D terminal transceiver, a time of data packet framing, and a time of physical layer transmission processing. at least one.
- the network side device sends the indication signaling to the D2D terminal that can use the D2D communication resource to send data, to indicate that the D2D terminal sends data on the D2D communication resource, which specifically includes:
- the network side device sends the indication signaling to the D2D terminal that can transmit the D2D communication resource by using the physical channel resource dedicated to the D2D link resource, to indicate that the D2D terminal sends the D2D communication resource. data.
- the network side device sends the indication signaling to the D2D terminal that can transmit the data of the D2D communication resource by using a physical channel resource dedicated to indicating the D2D link resource occupation, to indicate that the D2D terminal is in the
- the data is sent on the D2D communication resource, and specifically includes:
- the network side device sends the resource occupation indication information to the D2D terminal to indicate the D2D terminal on the dedicated physical hybrid automatic request retransmission indication channel PHICH resource configured in advance for the D2D terminal that can use the D2D communication resource to transmit data. Transmitting data on the D2D communication resource; or
- the network side device sends the resource occupation indication information to the D2D terminal to indicate the D2D terminal in the D2D communication resource on the dedicated D2D indicator channel resource configured in advance for the D2D terminal that can use the D2D communication resource to transmit data. Send data on.
- the dedicated D2D indicator channel resources of each D2D terminal are multiplexed in the same time-frequency resource by means of code division or frequency division or time division.
- the dedicated D2D indicator channel resource is located on at least one physical resource block PRB in the physical downlink shared channel PDSCH region.
- the network side device sends resource occupation indication information to the D2D terminal on the dedicated PHICH resource configured in advance for the D2D terminal that can use the D2D communication resource to transmit data, to indicate that the D2D terminal is in the When transmitting data on the D2D communication resource, the method further includes:
- a data transmission method in D2D communication comprising:
- the D2D terminal sends a resource occupation request for the D2D communication resource to the network side device, so that the network side device determines the resource occupation request sent by the at least one D2D terminal that shares the D2D communication resource to determine the at least one D2D terminal.
- a D2D terminal capable of occupying data transmitted by the D2D communication resource;
- the D2D terminal When the D2D terminal receives the indication signaling sent by the network side device, the D2D terminal sends data on the D2D communication resource according to the indication signaling.
- the method further includes:
- the D2D terminal When the D2D terminal does not receive the indication signaling sent by the network side device, the D2D terminal receives data on the D2D communication resource.
- the resource occupation request includes:
- the D2D terminal is configured on the physical uplink shared channel scheduled by the network side.
- the buffer status of the D2D communication sent by the PUSCH resource is reported by the BSR.
- the BSR is used to indicate the amount of data that the D2D terminal needs to transmit on the D2D link.
- the D2D terminal when the D2D terminal receives the indication signaling sent by the network side device, the D2D terminal sends the data on the D2D communication resource according to the indication signaling, which specifically includes:
- the D2D terminal When the D2D terminal receives the indication signaling sent by the network side device, the D2D terminal receives the indication signaling sent by the network side device on the subframe nk, and sends the data on the subframe n according to the indication signaling; wherein, the subframe n is a sub-frame included in the D2D communication resource, k is an integer not less than 1, and the value of k satisfies the following condition: The time length of the k sub-frames is greater than the preset D2D transmission pre-processing time.
- the subframe n and the subframe n-k comply with the transmission scheduling timing relationship defined in the Long Term Evolution (LTE) system; or, the subframe n-k is a D2D subframe adjacent to the subframe n.
- LTE Long Term Evolution
- the time for the D2D transmission pre-processing includes: a detection time of the indication signaling by the D2D terminal, At least one of a time of D2D terminal transceiver conversion, a time of packet framing, and a time of physical layer transmission processing.
- the D2D terminal receives the downlink control information DCI sent by the network side device through the physical downlink control channel PDCCH;
- the D2D terminal transmitting the data on the D2D communication resource
- the D2D terminal specifically includes: the D2D terminal transmitting data on the D2D communication resource according to the DCI;
- the method further includes: receiving, by the D2D terminal, indication signaling sent by the network side device by using a physical channel resource dedicated to indicating D2D link resource occupation;
- the D2D terminal sends the data on the D2D communication resource according to the indication signaling, where the D2D terminal sends the data on the D2D communication resource according to the indication signaling.
- the D2D terminal receives the indication signaling sent by the network side device by using the physical channel resource dedicated to the D2D link resource to specifically include: the dedicated physical hybrid automatic request configured by the D2D terminal in advance for the D2D terminal.
- Retransmitting the indication channel PHICH resource receiving the resource occupation indication information sent by the network side device; the sending, by the D2D terminal, the data on the D2D communication resource according to the indication signaling, specifically: according to the resource occupation indication information, in the D2D Send data on communication resources;
- the D2D terminal Receiving, by the D2D terminal, the indication signaling sent by the network side device by using the physical channel resource dedicated to the D2D link resource occupation, the specific D2D terminal receiving the network on the dedicated D2D indicator channel resource configured for the D2D terminal in advance Resource occupation indication information sent by the side device;
- the transmitting by the D2D terminal, the data on the D2D communication resource according to the indication signaling, specifically: sending data on the D2D communication resource according to the resource occupation indication information.
- the dedicated D2D indication channel resource is located on at least one physical resource block PRB in the PDSCH region.
- a base station comprising:
- a determining unit configured to determine, by the resource occupying request, a D2D terminal that can occupy the D2D communication resource sending data in the at least one D2D terminal;
- a sending unit configured to send, by the D2D terminal that can send data to the D2D communication resource, an indication signaling, to indicate that the D2D terminal sends data on the D2D communication resource.
- the receiving unit sends the received resource occupation request sent by each D2D terminal to:
- the buffer status report BSR for the D2D communication sent by the D2D terminal on the physical uplink shared channel PUSCH resource scheduled by the network side is used to indicate the amount of data that the D2D terminal needs to transmit on the D2D link.
- the determining unit is configured to:
- the D2D terminal that sends the resource occupation request is a D2D terminal capable of occupying the data sent by the D2D communication resource
- the sending unit is configured to:
- the sub-frame, k is an integer not less than 1, and the value of k satisfies the following condition:
- the time length of the k subframes is greater than the preset D2D transmission pre-processing time.
- the subframe n and the subframe n-k comply with the transmission scheduling timing relationship defined in the Long Term Evolution (LTE) system; or, the subframe n-k is a D2D subframe adjacent to the subframe n.
- LTE Long Term Evolution
- the time for the D2D transmission pre-processing includes: a detection time of the indication signaling by the D2D terminal, a time of conversion of the D2D terminal transceiver, a time of data packet framing, and a time of physical layer transmission processing. at least one.
- a first unit configured to send downlink control information DCI to the D2D terminal that can send data to the D2D communication resource by using a physical downlink control channel PDCCH, to indicate that the D2D terminal sends data on the D2D communication resource;
- a second unit configured to send, by using a physical channel resource dedicated to indicating D2D link resource occupation, to the D2D terminal capable of occupying the D2D communication resource to send indication signaling, to indicate that the D2D terminal is in the D2D communication Send data on the resource.
- the D2D terminal transmits data on the D2D communication resource;
- Dedicated D2D indication configured in advance for the D2D terminal capable of transmitting data for the D2D communication resource And transmitting, by the D2D terminal, resource occupation indication information, to indicate that the D2D terminal sends data on the D2D communication resource.
- the dedicated D2D indicator channel resources of each D2D terminal are multiplexed in the same time-frequency resource by means of code division or frequency division or time division.
- the dedicated D2D indication channel resource is located on at least one physical resource block PRB in the PDSCH region.
- the base station further includes:
- a base station includes a processor and a memory:
- the memory is configured to hold code for the computer program described above.
- the functions performed by the processor executing the computer program described above may be implemented by a computer program executed by the processor and the baseband processor.
- a terminal comprising:
- a requesting unit configured to send a resource occupation request for the D2D communication resource to the network side device, so that the network side device only needs to share the resource occupation request sent by the at least one D2D terminal of the D2D communication resource, and determine the at least one a D2D terminal capable of occupying the D2D communication resource transmission data in the D2D terminal;
- a communication unit configured to send data on the D2D communication resource according to the indication signaling when receiving the indication signaling sent by the network side device.
- the data is received on the D2D communication resource.
- the resource occupation request includes:
- the communication unit is configured to: when receiving the indication signaling sent by the network side device, receive the indication signaling sent by the network side device on the subframe nk; according to the indication signaling, on the subframe n send data;
- the sub-frame n is a sub-frame included in the D2D communication resource, and k is an integer not less than 1, and the value of k satisfies the following condition: a time length of the k sub-frames is greater than a preset D2D transmission pre-processing time. .
- the time for the D2D transmission pre-processing includes: a detection time of the indication signaling by the D2D terminal, a time of conversion of the D2D terminal transceiver, a time of data packet framing, and a time of physical layer transmission processing. at least one.
- the communication unit includes: a first receiving unit, configured to receive downlink control information DCI sent by the network side device by using a physical downlink control channel PDCCH; and a first sending unit, configured to use the D2D communication resource according to the DCI Send data on; or,
- the communication unit includes: a second receiving unit, configured to receive the indication signaling sent by the network side device by using a physical channel resource dedicated to the D2D link resource occupation; the second sending unit is configured to use the indication signaling according to the indication Send data on the D2D communication resource.
- the second receiving unit is configured to: receive the resource occupation indication information sent by the network side device on the dedicated physical hybrid automatic request retransmission indication channel PHICH resource configured for the D2D terminal in advance; the second sending The unit is configured to: send data on the D2D communication resource according to the resource occupation indication information; or
- the second receiving unit is configured to: receive the resource occupation indication information sent by the network side device on the dedicated D2D indication channel resource configured for the D2D terminal in advance; the second sending unit is configured to: Information is transmitted on the D2D communication resource.
- the dedicated D2D indicator channel resources of each D2D terminal are multiplexed in the same time-frequency resource by means of code division or frequency division or time division.
- the dedicated D2D indication channel resource is located on at least one physical resource block PRB in the PDSCH region.
- a terminal comprising a processor and a memory:
- the memory is configured to hold code for the computer program described above.
- the network side device after receiving the resource occupation request for the same D2D communication resource sent by the at least one D2D terminal, determines, according to the received resource occupation request, that the D2D communication resource can be occupied by the at least one D2D terminal. Transmitting a D2D terminal of the data, and sending the indication signaling to the determined D2D terminal capable of occupying the data of the D2D communication resource, the D2D terminal receiving the indication signaling, and sending the data on the D2D communication resource according to the indication signaling .
- each D2D terminal sends a resource occupation request to the network side device when the data needs to be occupied by the D2D communication resource, and the network side device determines the D2D terminal that can occupy the data for transmitting the D2D communication resource according to a certain policy, and indicates the determined D2D.
- the terminal sends data on the D2D communication resource, and the decision of the resource occupant to be performed by the network side device can avoid the problem of resource occupation conflict caused by multiple D2D terminals competing for the same D2D communication resource, thereby reducing the problem.
- the probability of resource occupation conflict in D2D communication BRIEF DESCRIPTION OF THE DRAWINGS
- FIG. 1 is a schematic diagram of an N2D link and a D2D link in the prior art
- FIG. 2 is a schematic diagram of resource configuration of a semi-static D2D communication in the prior art
- FIG. 3 is a schematic diagram of data flow of terminal communication in a cellular network in the prior art
- FIG. 5 is a schematic diagram of resource mapping of a PHICH group in a control area according to an embodiment of the present application
- FIG. 6 is a schematic flowchart of a method provided by an embodiment of the present application.
- FIG. 8b is a schematic diagram of resource configuration in an embodiment of the present application.
- FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present application.
- FIG. 10 is a schematic structural diagram of another base station according to an embodiment of the present application.
- FIG. 11 is a schematic structural diagram of a terminal according to an embodiment of the present application.
- the LTE D2D technology refers to D2D communication controlled by an LTE network operating on an LTE licensed frequency band.
- the control of LTE network can also overcome some problems of traditional D2D technology, such as uncontrollable interference.
- the introduction of LTE D2D features will enable LTE technology to evolve from pure wireless mobile cellular communication technology to Universal Connectivity Technology.
- a UE transmits the same data (group communication) to all UEs in a communication group by a single transmission;
- Group/broadcast communication scenarios can be used for fire, rescue, and counter-terrorism in public safety applications.
- the Scheduling Request is used to request the base station to schedule the UE to perform uplink transmission.
- LTE Long Term Evolution
- LTE-A Long Term Evolution-Advanced
- the resource of the Radio Resource Control (RRC) connection state configures a dedicated periodic SR resource, and the corresponding physical channel is the Physical Uplink Control Channel (PUCCH) format (format) 1/la/lb. resource of.
- PUCCH Physical Uplink Control Channel
- PHICH physical hybrid automatic request re-indication channel
- the PHICH is used to carry the feedback information of the uplink service, that is, the acknowledgement/negative acknowledgement (ACK/NACK) information.
- ACK/NACK acknowledgement/negative acknowledgement
- the PHICH resource indications are mainly indicated by a parameter pair PHICH , PHICH , where "pmc H is the PHICH group"
- PfflCH is the index of the orthogonal sequence.
- PHICH group refers to a collection of Resource Element (RE), in this
- Eight PHICHs can be transmitted in the set of REs, and each PHICH is distinguished by an orthogonal sequence. For routine
- the number of PHICH groups in the system can be determined as follows:
- each PHICH group is mapped on the first 3 OFDM symbols of the downlink subframe, in the multimedia broadcast multicast service single frequency network (Multimedia Broadcast The multicast service Single Frequency Network (MB SFN) sub-frames and TD-LTE subframes 1 and 6 are mapped on the first 2 OFDM symbols to support a larger coverage radius or a larger number of users.
- MB SFN Multimedia Broadcast The multicast service Single Frequency Network
- TD-LTE subframes 1 and 6 are mapped on the first 2 OFDM symbols to support a larger coverage radius or a larger number of users.
- the number of PHICH groups in the cell also has four different levels of configuration ( G ' 1 1 2 ' ⁇ 2 ⁇ ), which is used to support different user capacities through system broadcast notification.
- the ACK/NACK information corresponding to the uplink data is carried in the PHICH in the downlink subframe.
- the PHICH resource is the lowest PRB number of the resources allocated in the line indicated in the PUSCH transmission permission in the Downlink Control Information (DCI) format 0 of the PDCCH, and the uplink demodulation reference symbol indicated by 3 bits (Demodulation Reference)
- DCI Downlink Control Information
- DMRS Downlink demodulation Reference
- the PHICH resource is identified by a pair of numbers, n PHicH , n icH ), where "c/i is the PHICH group number;
- DMRS is the DMRS cyclic shift value used in the uplink transmission corresponding to PHICH, and is mapped by cyclic shift information in the DMRS field in DCI format 0, as shown in Table 1 below.
- N DMRS is set to 0;
- the PRB RA is the second TB of the PUSCH indicated by the PDCCH when the I PRB RA and the number of TBs in the PUSCH of the latest PDCCH scheduling are not equal.
- Table 1 It can be seen from the calculation method determined by the PHICH resource that the PHICH resource collision avoidance can be adjusted by adjusting the PUSCH.
- the starting position of the transmitted PRB, and/or the manner of adjusting the DMRS cyclic shift indication flag in the PUSCH transmission is implemented.
- HARQ indicator HARQ indicator
- Table 2 The ACK/NACK information of the PUSCH carried by the PHICH is called Hybrid Automatic Repeat reQuest (HARQ indicator, HI), where 0 means NACK and 1 means ACK.
- HARQ indicator HI
- 0 means NACK and 1 means ACK.
- HI first uses 3-bit repetition coding, as shown in Table 2 below:
- the HI codeword is modulated by Binary Phase Shift Keying (BPSK) and then sequence-by-symbol, where each bit is extended to the orthogonal sequence indicated by c ff . Then follow the 6.9 section of 36.211 The content is antennaized and mapped.
- BPSK Binary Phase Shift Keying
- the data sending method in the D2D communication includes the following steps: Step 60: The network side device receives, by the at least one D2D terminal, a resource occupation request for the D2D communication resource, where the at least one D2D terminal is a D2D terminal sharing the D2D communication resource;
- Step 62 The network side device sends indication signaling to the determined D2D terminal that can use the D2D communication resource to send data, to indicate that the D2D terminal sends data on the D2D communication resource.
- the resource occupation request sent by each D2D terminal may include: an SR sent by the D2D terminal on a dedicated scheduling request (SR) resource configured for the D2D link configured by the D2D terminal, where the SR is used to indicate the D2D The terminal needs to transmit data on the D2D link; or the SR sent by the D2D terminal on the dedicated SR resource for the D2D link configured by the D2D terminal, the SR is used to indicate that the D2D terminal needs to be on the D2D link.
- SR dedicated scheduling request
- the dedicated SR resource for the D2D link configured by the D2D terminal on the network side refers to a resource configured for the D2D terminal by the network side only for the D2D terminal to send the SR through the D2D link.
- the network side needs to configure a dedicated SR resource for each D2D terminal in the system.
- different dedicated SR resources need to be configured, so that different D2D terminals can be distinguished.
- the frequency domain locations of their exclusive SR resources may be the same or different, but the time positions need to be different.
- a dedicated SR resource can occupy a physical uplink control channel (PUCCH) format 1/la/lb of resources.
- PUCCH physical uplink control channel
- the network side device resource occupancy request determines a D2D terminal in the at least one D2D terminal that can occupy the data sent by the D2D communication resource, and the specific implementation may be as follows:
- the D2D terminal that determines that the resource occupation request is sent is a D2D terminal that can occupy the data transmitted by the D2D communication resource; where the network side device receives the D2D terminal and sends the D2D terminal.
- the D2D terminal needs to determine whether the D2D communication resource is used to transmit data or receive data on the D2D communication resource. If the D2D communication resource is used to transmit data, the D2D terminal sends the indication signaling to the D2D terminal. The D2D terminal is notified to occupy the D2D communication resource transmission data, and if the data is received on the D2D communication resource, the indication signaling may not be sent to the D2D terminal.
- the network side device receives the resource occupation request sent by the multiple D2D terminals, determining, according to the principle that the terminal polls the occupied resources, a D2D terminal that can occupy the data of the D2D communication resource transmission in the multiple D2D terminals, or according to the receiving
- the resource occupancy request is determined to determine the service requirement of each D2D terminal, and a D2D terminal capable of occupying the D2D communication resource transmission data among the plurality of D2D terminals is determined according to the service requirement of each D2D terminal.
- the service requirement of the corresponding D2D terminal is determined according to at least one of a status of the buffer area, a service priority, and a service delay included in the received BSR, and the multiple D2D is determined by the service requirement of each D2D terminal.
- a D2D terminal capable of occupying the data transmission data of the D2D communication resource in the terminal for example, when determining, according to the state of the buffer area included in the B SR, that the amount of data that the corresponding D2D terminal needs to transmit is the largest, it may be determined that the D2D terminal is capable of occupying the D2D communication.
- the D2D terminal that is configured to transmit the data by the D2D terminal may be determined to be the D2D terminal capable of occupying the data of the D2D communication resource when the D2D terminal has the highest service priority according to the service priority included in the BSR; or When it is determined that the service delay requirement of the D2D terminal is the highest according to the service delay included in the BSR, it may be determined that the D2D terminal is a D2D terminal capable of occupying data transmitted by the D2D communication resource, and the like. Specific strategies can be flexibly formulated.
- the network side device sends the indication signaling to the D2D terminal that can transmit the D2D communication resource to indicate that the D2D terminal sends data on the D2D communication resource
- the specific implementation may be as follows:
- the network side device sends the indication signaling to the D2D terminal that can use the D2D communication resource to send data on the subframe nk, to indicate that the D2D terminal sends data on the subframe n, where the subframe n is included in the D2D communication resource.
- k is an integer not less than 1, and the value of k satisfies the following condition:
- the time length of the k subframes is greater than the preset D2D transmission pre-processing time. for example:
- Example 1 The subframe n and the subframe nk comply with the transmission scheduling timing relationship defined in the LTE system (refer to the LTE protocol RS36.213 for details), that is, the timing relationship between the subframe n and the subframe nk, and the PUSCH data in the LTE system. Child The timing relationship between the frame n and the subframe nk of the scheduling signaling for transmitting the PUSCH data is the same.
- the value of k is fixed to 4.
- the value of k is related to the TDD uplink and downlink configuration.
- the time for the D2D transmission pre-processing may include: at least one of a D2D terminal, a detection time of the indication signaling, a time of the D2D terminal transceiver conversion, a time of the data packet framing, and a time of the physical layer transmission processing.
- the time of packet framing indicates the processing time in the process of the radio link control (RLC) layer and the medium access control (MAC) layer composing the data frame according to the frame format
- the time of the physical layer transmission processing indicates that the physical layer modulates the data. Processing time for encoding, encoding, and resource mapping.
- the network side device sends the indication signaling to the D2D terminal that can use the D2D communication resource to send data, to indicate that the D2D terminal sends data on the D2D communication resource
- the specific implementation may be as follows:
- the physical downlink control channel (PDCCH) sends downlink control information (DCI) to the D2D terminal that can occupy the D2D communication resource to transmit data, to indicate that the D2D terminal sends data on the D2D communication resource; the DCI can be used to occupy the D2D communication.
- the C-RNTI of the D2D terminal transmitting the data is scrambled to enable the D2D terminal to detect the DCI. This method is more suitable for dynamic scheduling; or
- the network side device sends the indication signaling to the D2D terminal that can transmit the D2D communication resource by using the physical channel resource dedicated to the D2D link resource to indicate that the D2D terminal sends the data on the D2D communication resource.
- the network side device sends the indication signaling to the D2D terminal that can transmit the D2D communication resource by using the physical channel resource dedicated to the D2D communication resource to indicate that the D2D terminal sends the data on the D2D communication resource.
- the following two methods can be used:
- the network side device sends the resource occupation indication information to the D2D terminal on the dedicated physical hybrid automatic request retransmission indicator channel (PHICH) resource configured in advance for the D2D terminal that can occupy the data of the D2D communication resource to indicate the
- the D2D terminal sends data on the D2D communication resource.
- PHICH physical hybrid automatic request retransmission indicator channel
- the network side device sends the resource occupation indication information to the D2D terminal on the dedicated D2D indicator channel resource configured in advance for the D2D terminal that can occupy the D2D communication resource to indicate that the D2D terminal is in the D2D terminal.
- the dedicated D2D indication channel is a newly defined physical channel, that is, a physical channel different from the physical channel in the prior art, and the dedicated D2D indication channel resource of each D2D terminal may be multiplexed by code division or frequency division or time division. In the same time-frequency resource.
- the dedicated D2D indicator channel resource may be located on at least one PRB in the PDSCH area, that is, at least one PRB pair in the downlink PDSCH area of the LTE system is configured as a resource occupied by the D2D indicator channel, and the dedicated D2D indicator channel may be used. It is similar to the definition of PHICH in LTE system, or the definition of PUCCH.
- the resource occupation indication of the D2D terminal corresponding to the dedicated D2D indication channel resource is set. Bit, the D2D terminal corresponding to the dedicated D2D indication channel resource can transmit data in the D2D subframe n.
- the base station configures one or more PRB pairs as resources occupied by the dedicated D2D indicator channel, where the RE of the PDSCH region in each PRB pair is used.
- each group is called D2D-REG
- D2D-REG is similar to REG in PHICH
- three D2D_REGs form a D2D indicator channel group
- one D2D indicates three D2Ds in the channel group -REG is spread as far as possible into different PRB pairs by interleaving. Others can follow the PHICH treatment.
- one PRB pair in D2D-REG can be configured as shown in FIG. 7a has marked RE R 7 and R 9 is.
- the base station configures one or more PRB pairs as resources occupied by the dedicated D2D indicator channel, and first spreads a modulation symbol in the frequency domain to the entire PRB, that is, performs a cyclic sequence on the frequency domain similar to PUCCH.
- the length of the extension is m, the length of m needs to be less than or equal to the number of OFDM symbols available for PDSCH transmission in one subframe, and the process of orthogonal extension A process similar to the orthogonal extension of PUCCH.
- the multiplexing of different channel resources in the same PRB pair is distinguished by sequence.
- the network side device sends the resource occupation indication information to the D2D terminal on the dedicated PHICH resource configured in advance for the D2D terminal that can use the D2D communication resource to transmit data.
- the network side device determines the location of the PHICH resource used for transmitting the ACK/NACK information corresponding to the PUSCH transmission, and the dedicated PHICH resource used for transmitting the resource occupation indication information.
- the ACK/NACK information is discarded on the dedicated PHICH resource, and when the DCI for scheduling the next PUSCH transmission is sent, the new data indication (NDI) field in the DCI is used to indicate whether the PUSCH data is correctly received. .
- NDI new data indication
- PHICH resource collision avoidance mechanism may be implemented by adjusting a starting position of a PRB transmitted by a PUSCH and/or adjusting a DMRS cyclic shift indication flag in a PUSCH transmission.
- Adjusting the location of the PHICH resource used by the subsequent network side device to perform ACK/NACK feedback to the D2D terminal if the location of the PHICH resource overlaps with the location of the dedicated PHICH resource used to send the resource occupation indication information, adjusting the D2D terminal Performing a start position of the PRB and a DMRS cyclic shift indication identifier used by the PUSCH transmission, so that the network side device determined according to the adjusted start position of the PRB and the DMRS cyclic shift indication identifier performs ACK/NACK feedback to the D2D terminal.
- the location of the PHICH resource used at the time does not overlap with the location of the dedicated PHICH resource used to transmit the resource occupation indication information.
- an embodiment of the present application provides a data sending method in D2D communication, including the following steps: Step 80: A D2D terminal sends a resource occupation request for a D2D communication resource to a network side device, so that the network side device shares the a resource occupation request sent by at least one D2D terminal of the D2D communication resource, determining a D2D terminal in the at least one D2D terminal capable of occupying the D2D communication resource transmission data;
- Step 81 When the D2D terminal receives the indication signaling sent by the network side device, the D2D terminal sends data on the D2D communication resource according to the indication signal.
- the D2D terminal when the D2D terminal does not receive the indication signaling sent by the network side device, the D2D terminal receives the data on the D2D communication resource.
- the resource occupation request sent by the D2D terminal may include: an SR sent by the D2D terminal on the dedicated SR resource for the D2D link configured by the D2D terminal, where the SR is used to indicate that the D2D terminal needs to be on the D2D link.
- the SR is used to indicate that the D2D terminal needs to transmit data on the D2D link
- the D2D a buffer status 4 (BSR) for D2D communication sent by the terminal on the PUSCH resource scheduled by the network where the BSR is used to indicate the amount of data that the D2D terminal needs to transmit on the D2D link
- the D2D terminal A BSR for D2D communication sent on the PUSCH resource scheduled by the network side the BSR is used to indicate the amount of data that the D2D terminal needs to transmit on the D2D link.
- the dedicated SR resource for the D2D link configured by the D2D terminal on the network side refers to the resource configured by the network side for the D2D terminal only for the D2D terminal to send the SR through the D2D link.
- the network side needs to configure a dedicated SR resource for each D2D terminal in the system.
- different dedicated SR resources need to be configured, so that different D2D terminals can be distinguished.
- the frequency domain locations of the exclusive SR resources of the terminal may be the same or different, but the time positions need to be different.
- a dedicated SR resource can occupy resources of PUCCH formatl/la/lb.
- the D2D terminal when the D2D terminal receives the indication signaling sent by the network side device, the D2D terminal sends data on the D2D communication resource according to the indication signaling, and the specific implementation may be as follows:
- the D2D terminal When the D2D terminal receives the indication signaling sent by the network side device, the D2D terminal receives the indication signaling sent by the network side device on the subframe nk, and sends the data on the subframe n according to the indication signaling; where, the subframe n For the subframe included in the D2D communication resource, k is an integer not less than 1, and the value of k satisfies the following condition: The time length of the k subframes is greater than the preset D2D transmission pre-processing time. for example:
- the subframe n and the subframe nk comply with the transmission scheduling timing relationship defined in the LTE system, that is, the timing relationship between the subframe n and the subframe nk, and the subframe n transmitting the PUSCH data in the LTE system and transmitting the PUSCH data.
- the timing of the subframe nk of the scheduling signaling is the same.
- the value of k is fixed to 4.
- the value of k is related to the uplink and downlink configuration of the TDD.
- the time for the D2D transmission pre-processing may include: at least one of a detection time of the indication signaling by the D2D terminal, a time of converting the D2D terminal transceiver, a time of data packet framing, and a time of physical layer transmission processing. .
- the D2D terminal receives the DCI sent by the network side device by using the PDCCH, and sends the data on the D2D communication resource according to the DCI. Specifically, the D2D terminal detects the C-RNTI scrambling using the D2D terminal on the PDCCH. DCI, sending data on the D2D communication resource according to the DCI; or
- the D2D terminal receives the indication signaling sent by the network side device by using the physical channel resource dedicated to the D2D link resource occupation, and sends the data on the D2D communication resource according to the indication signaling.
- the specific implementation may use the following two types. the way:
- the D2D terminal receives the resource occupation indication information sent by the network side device on the dedicated PHICH resource configured for the D2D terminal, and sends data on the D2D communication resource according to the resource occupation indication information; for example, if the D2D sub In the subframe nk before the frame n, the dedicated PHICH resource of the D2D terminal carries "1", then the resource occupancy indication of the D2D terminal is set, and the D2D terminal can send data in the D2D subframe n.
- the D2D terminal receives the resource occupation indication information sent by the network side device on the dedicated D2D indication channel resource configured for the D2D terminal, and sends the data on the D2D communication resource according to the resource occupation indication information.
- the dedicated D2D indication channel is a newly defined physical channel, that is, a physical channel different from the physical channel in the prior art, and the dedicated D2D indication channel resource of each D2D terminal may be multiplexed by code division or frequency division or time division. In the same time-frequency resource.
- the dedicated D2D indicator channel resource may be located on at least one PRB in the PDSCH area, that is, at least one PRB pair in the downlink PDSCH area of the LTE system is configured as a resource occupied by the D2D indicator channel, and the dedicated D2D indicator channel may be used. It is similar to the definition of PHICH in LTE system, or the definition of PUCCH. If the dedicated D2D of the D2D terminal indicates that the channel resource is set (ie, the bearer information is "1") in the subframe nk before the D2D subframe n, it indicates that the resource occupancy indication of the D2D terminal is set, and the D2D terminal may The data is transmitted in the D2D subframe n.
- Step 1 at least one D2D terminal (for example, D2D terminal A and D2D terminal B) sharing the same D2D communication resource sends a resource occupation request for the D2D communication resource to the base station;
- D2D terminal A and D2D terminal B sharing the same D2D communication resource sends a resource occupation request for the D2D communication resource to the base station;
- Step 2 After receiving the resource occupation request sent by each D2D terminal, the base station determines, according to the received resource occupation request, a D2D terminal that can transmit data of the D2D communication resource (ie, D2D subframe) in at least one D2D terminal, and The D2D terminal capable of occupying the D2D communication resource sending data sends the indication signaling to indicate that the D2D terminal sends data on the D2D communication resource, for example, instructing the D2D terminal A or the D2D terminal B to have a data transmission right on the D2D subframe;
- a D2D terminal that can transmit data of the D2D communication resource (ie, D2D subframe) in at least one D2D terminal
- the D2D terminal capable of occupying the D2D communication resource sending data sends the indication signaling to indicate that the D2D terminal sends data on the D2D communication resource, for example, instructing the D2D terminal A or the D2D terminal B to have a data transmission right on the D2
- Step 3 The D2D terminal that receives the indication signaling sent by the base station sends data according to the indication signaling on the D2D communication resource (ie, the D2D subframe).
- an embodiment of the present application provides a base station, where the base station includes:
- the receiving unit 90 is configured to receive, by the at least one D2D terminal, a resource occupation request for the D2D communication resource, where the at least one D2D terminal is a D2D terminal that shares the D2D communication resource;
- a determining unit 91 configured to determine, by the resource occupying request, a D2D terminal that can occupy the D2D communication resource sending data in the at least one D2D terminal;
- the sending unit 92 is configured to send indication signaling to the D2D terminal that can send data to the D2D communication resource, to indicate that the D2D terminal sends data on the D2D communication resource.
- the receiving unit 90 receives, by the receiving unit, the resource occupation request sent by each D2D terminal: the SR sent by the D2D terminal on the dedicated scheduling request SR resource for the D2D link configured by the D2D terminal on the network side, where SR is used to indicate that the D2D terminal needs to transmit data on the D2D link; and/or,
- the determining unit 91 is configured to:
- the D2D terminal that sends the resource occupation request is a D2D terminal capable of occupying the data sent by the D2D communication resource
- the resource occupation request sent by the multiple D2D terminals is received, determining, according to the principle that the terminal polls the occupied resources, a D2D terminal that can occupy the data of the D2D communication resource transmission in the multiple D2D terminals, or according to the received
- the resource occupation request determines the service requirement of each D2D terminal, and determines a D2D terminal that can occupy the D2D communication resource transmission data among the plurality of D2D terminals according to the service requirement of each D2D terminal.
- the sending unit 92 is configured to:
- the sub-frame, k is an integer not less than 1, and the value of k satisfies the following condition:
- the time length of the k subframes is greater than the preset D2D transmission pre-processing time.
- subframe n and the subframe n-k comply with the transmission scheduling timing relationship defined in the Long Term Evolution (LTE) system; or
- the subframe n-k is a D2D subframe adjacent to the subframe n, and the time interval between the subframe n-k and the subframe n is greater than the time of the D2D transmission pre-processing.
- the time for the D2D transmission pre-processing includes: at least the detection time of the indication signaling, the time of the D2D terminal transceiver conversion, the time of the data packet framing, and the time of the physical layer transmission processing by the D2D terminal.
- the sending unit 92 includes a first unit or a second unit:
- a first unit configured to send downlink control information DCI to the D2D terminal that can send data to the D2D communication resource by using a physical downlink control channel PDCCH, to indicate that the D2D terminal sends data on the D2D communication resource;
- a second unit configured to send, by using a physical channel resource dedicated to indicating D2D link resource occupation, to the D2D terminal capable of occupying the D2D communication resource to send indication signaling, to indicate that the D2D terminal is in the D2D communication Send data on the resource.
- the second unit is used to:
- the dedicated D2D of each D2D terminal indicates that the channel resource is recovered by code division or frequency division or time division. Used in the same time-frequency resources.
- the dedicated D2D indication channel resource is located on at least one physical resource block PRB in the PDSCH region.
- the base station further includes:
- the resource conflict processing unit 93 is configured to send resource occupation indication information to the D2D terminal on the dedicated PHICH resource configured in advance for the D2D terminal that can use the D2D communication resource to transmit data, to indicate that the D2D terminal is in the When transmitting data on the D2D communication resource, if the location of the PHICH resource used for transmitting the acknowledgement/negative acknowledgement ACK/NACK information corresponding to the physical uplink shared channel PUSCH transmission is determined, and the dedicated PHICH resource used for transmitting the resource occupation indication information is determined.
- the ACK/NACK information is sent on the dedicated PHICH resource, and when the DCI for scheduling the next PUSCH transmission is sent, the new data in the DCI is used to indicate whether the DI domain indicates whether the PUSCH data is correctly received. .
- an embodiment of the present application provides a base station 100, where the base station includes a processor 101 and a memory 102.
- the processor 101 is configured to execute a computer program that receives the following functions: receiving D2D communication resources sent by at least one D2D terminal. a resource occupancy request, the at least one D2D terminal is a D2D terminal sharing the D2D communication resource; and the D2D terminal is configured to determine a D2D of the at least one D2D terminal capable of occupying the D2D communication resource transmission data. And transmitting, by the D2D terminal that is capable of occupying the D2D communication resource, the indication signaling to the D2D terminal to send data on the D2D communication resource.
- the memory 102 is configured to hold the code of the above computer program.
- the functions performed by the processor executing the computer program described above can be implemented by a computer program executed by the processor and the baseband processor.
- an embodiment of the present application provides a terminal, where the terminal includes:
- the requesting unit 111 is configured to send a resource occupation request for the D2D communication resource to the network side device, so that the network side device determines the at least one resource according to the resource occupation request sent by the at least one D2D terminal that shares the D2D communication resource.
- a D2D terminal capable of occupying the D2D communication resource transmission data in the D2D terminal;
- the communication unit 112 is configured to: when receiving the indication signaling sent by the network side device, send data on the D2D communication resource according to the indication signaling.
- the communication unit 112 is further configured to:
- the data is received on the D2D communication resource.
- the resource occupation request includes:
- the dedicated scheduling request for the D2D link configured by the D2D terminal on the network side for the D2D link is sent on the SR resource.
- the SR is used to indicate that the D2D terminal needs to transmit data on the D2D link;
- the communication unit 112 is configured to: when receiving the indication signaling sent by the network side device, receive the indication signaling sent by the network side device on the subframe nk; according to the indication signaling, on the subframe n send data;
- the sub-frame n is a sub-frame included in the D2D communication resource, and k is an integer not less than 1, and the value of k satisfies the following condition: a time length of the k sub-frames is greater than a preset D2D transmission pre-processing time. .
- subframe n and the subframe n-k comply with the transmission scheduling timing relationship defined in the Long Term Evolution (LTE) system; or
- the subframe n-k is a D2D subframe adjacent to the subframe n, and the time interval between the subframe n-k and the subframe n is greater than the time of the D2D transmission pre-processing.
- the time for the D2D transmission pre-processing includes: at least the detection time of the indication signaling, the time of the D2D terminal transceiver conversion, the time of the data packet framing, and the time of the physical layer transmission processing by the D2D terminal.
- the communication unit 112 includes: a first receiving unit, configured to receive downlink control information DCI sent by the network side device by using a physical downlink control channel PDCCH; and a first sending unit, configured to use the D2D communication resource according to the DCI Send data on; or,
- the communication unit 112 includes: a second receiving unit, configured to receive the indication signaling sent by the network side device by using a physical channel resource dedicated to the D2D link resource occupation; the second sending unit is configured to use, according to the indication signaling, Transmitting data on the D2D communication resource.
- the second receiving unit is configured to: receive the resource occupation indication information sent by the network side device on the dedicated physical hybrid automatic request retransmission indication channel PHICH resource configured for the D2D terminal in advance; the second sending unit For: transmitting data on the D2D communication resource according to the resource occupation indication information; or
- the second receiving unit is configured to: receive the resource occupation indication information sent by the network side device on the dedicated D2D indication channel resource configured for the D2D terminal in advance; the second sending unit is configured to: Information is transmitted on the D2D communication resource.
- the dedicated D2D indicator channel resource of each D2D terminal is multiplexed in the same time-frequency resource by means of code division or frequency division or time division.
- the dedicated D2D indication channel resource is located on at least one physical resource block PRB in the PDSCH region.
- an embodiment of the present application further provides a terminal 120, where the terminal includes a processor 121 and a memory 122.
- the processor 121 is configured to: send a resource occupation request for a D2D communication resource to a network side device, so as to enable Determining, by the network side device, a resource occupation request sent by at least one D2D terminal that shares the D2D communication resource, determining a D2D terminal that can occupy the D2D communication resource transmission data in the at least one D2D terminal;
- the indication signaling is sent by the device, the data is sent on the D2D communication resource according to the indication signaling;
- the memory 122 is configured to save the code of the computer program.
- the functions performed by the processor to execute the computer program described above may be implemented by a computer program executed by the processor and the baseband processor.
- the beneficial effects of the application include:
- the network side device after receiving the resource occupation request for the same D2D communication resource sent by the at least one D2D terminal, determines, according to the received resource occupation request, that the D2D communication resource can be occupied by the at least one D2D terminal. Transmitting a D2D terminal of the data, and sending the indication signaling to the determined D2D terminal capable of occupying the data of the D2D communication resource, the D2D terminal receiving the indication signaling, and sending the data on the D2D communication resource according to the indication signaling .
- each D2D terminal sends a resource occupation request to the network side device when the data needs to be occupied by the D2D communication resource, and the network side device determines the D2D terminal that can occupy the data for transmitting the D2D communication resource according to a certain policy, and indicates the determined D2D.
- the terminal sends data on the D2D communication resource, and the decision of the resource occupant to be performed by the network side device can avoid the problem of resource occupation conflict caused by multiple D2D terminals competing for the same D2D communication resource, thereby reducing the problem.
- the probability of resource occupation conflict in D2D communication is not limited to the probability of resource occupation conflict in D2D communication.
- a method for resource resolution of D2D terminal resources through the network side which has a relatively small impact on the LTE protocol, and can greatly improve the resource utilization rate of the system when the number of users is relatively large.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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Abstract
本申请实施例公开了一种D2D通信中的数据发送方法和设备,涉及无线通信领域,用于降低D2D通信中资源占用冲突的概率。本申请中,网络侧设备接收至少一个D2D终端发送的对相同D2D通信资源的资源占用请求后,根据接收到的资源占用请求确定该至少一个D2D终端中能够占用该D2D通信资源发送数据的一个D2D终端,并向确定的能够占用该D2D通信资源发送数据的D2D终端发送指示信令,该D2D终端接收到该指示信令后根据该指示信令在该D2D通信资源上发送数据。采用本申请可以降低D2D通信中资源占用冲突的概率。
Description
D2D通信中的数据发送方法和设备 本申请要求在 2013年 4月 28日提交中国专利局、 申请号为 201310156492.9、发明名称为 "D2D通信中的数据发送方法和设备"的中国专利申请的优先权, 其全部内容通过引用结合 在本申请中。 技术领域 本申请涉及无线通信领域, 尤其涉及一种 D2D通信中的数据发送方法和设备。 背景技术 在蜂窝网络控制下的设备到设备( Device-to-Device, D2D ) (也可称为终端直通)通 信系统, 为了描述方便, 定义 D2D终端之间的通信链路称之为 D2D link ( Device-to-device link ), 网络与 D2D终端之间的蜂窝通信链路称之为 N2D link ( Network-to-device link ), 如 图 1所示。
对于 D2D数据传输过程中釆用上行载波(频分双工( Frequency division duplex, FDD ) 系统 ) /上行子帧(时分双工( Time division duplex, TDD )系统),还是釆用下行载波( FDD 系统) /下行子帧 (TDD系统) 的考虑如下: 对于下行子帧 /下行载波来说, 会出现如下的 情况, D2D 终端既要接收基站侧 N2D link 上传输的数据 (至少包含物理下行控制信道
( Physical Downlink Control Channel, PDCCH ) 的数据), 同时又要在 D2D链路上进行数 据的发送, 这样 D2D终端需要在接收完 PDCCH之后进行收发转换, 同时对于 PDCCH的 解调来说, 需要接收多列小区专属导频信号 ( Cell-specific reference signals, CRS )进行解 调, 从而获得更好的 PDCCH解调性能, 那么考虑到收发转换的时间, 在下行子帧 /下行载 波中可用于 D2D link传输的 OFDM符号比较少。 因此倾向于釆用上行子帧 /上行载波作为 D2D数据传输的资源。 釆用上行载波作为 D2D数据传输的资源, D2D终端可以同时进行 下行载波中接收 N2D link的业务和控制, 又可以同时在 D2D link上通信。
通常情况下, 对于一对 /组 D2D终端( UE ), 网络侧半静态的为一对 /组 D2D终端配置 共享的用于 D2D 通信( D2D link )的时频资源,其可以是子帧(时域) +物理资源块( PRB )
(频域)的配置方式, 如图 2所示。 在给定的共享的时频资源上, D2D 终端之间需要通过 竟争的方式占用当前的时频资源,也就是说,竟争到资源的 D2D终端拥有在当前时频资源 的发送数据的权利。
传统的蜂窝通信技术中, 两个终端之间的数据通信流程如图 3所示。 两个终端的语音 和数据等业务经过各自驻留的基站(eNB ) 以及核心网进行交互。
D2D是邻近的终端可以在近距离范围内通过直连链路进行数据传输的方式, 不需要通 过中心节点(即基站)进行转发, 如图 4所示。 D2D技术本身的短距离通信特点和直接通 信方式使其具有如下优势: 终端近距离直接通信方式可实现较高的数据速率、 较低的延迟 和较低的功耗; 利用网络中广泛分布的用户终端以及 D2D通信链路的短距离特点,可以实 现频谱资源的有效利用; D2D的直接通信方式能够适应如无线 P2P等业务的本地数据共享 需求, 提供具有灵活适应能力的数据服务; D2D直接通信能够利用网络中数量庞大且分布 广泛的通信终端以拓展网络的覆盖范围。
综上,在传统的终端到终端的短距通信系统中,例如 Zigbee、无线宽带直连( WIFI direct ) 之间的通信, 通常情况下釆用的都是载波侦听多路访问 /冲突避免 (Carrier Sense Multiple Access/Collision Avoidance, CSMA/CA ) 的机制进行资源的竟争, 在这种机制下, 当需要 相互通信的终端个数比较多的时候会导致冲突的概率增加, 从而降低系统的效率。 发明内容 本申请实施例提供一种 D2D通信中的数据发送方法和设备 , 用于降低 D2D通信中资 源占用冲突的概率。
一种 D2D通信中的数据发送方法, 该方法包括:
网络侧设备接收至少一个 D2D终端发送的对 D2D通信资源的资源占用请求, 所述至 少一个 D2D终端为共享所述 D2D通信资源的 D2D终端;
网络侧设备才 居所述资源占用请求,确定所述至少一个 D2D终端中能够占用所述 D2D 通信资源发送数据的一个 D2D终端;
网络侧设备向所述能够占用所述 D2D通信资源发送数据的 D2D终端发送指示信令, 以指示该 D2D终端在所述 D2D通信资源上发送数据。
较佳地, 每个 D2D终端发送的资源占用请求包括:
该 D2D终端在网络侧为自身配置的用于 D2D链路的专属调度请求 SR资源上发送的 SR, 该 SR用于表示该 D2D终端需要在 D2D链路上传输数据; 和 /或,
该 D2D终端在网络侧调度的物理上行共享信道 PUSCH资源上发送的针对 D2D通信 的緩存区状态报告 BSR,该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输的数据 量。
较佳地, 所述网络侧设备根据所述资源占用请求,确定所述至少一个 D2D终端中能够 占用所述 D2D通信资源发送数据的一个 D2D终端, 具体包括:
网络侧设备若接收到一个 D2D终端发送的资源占用请求,则确定发送资源占用请求的 D2D终端是能够占用所述 D2D通信资源发送数据的一个 D2D终端;
网络侧设备若接收到多个 D2D终端发送的资源占用请求,则根据终端轮询占用资源的 原则, 确定该多个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端, 或 者, 根据接收到的资源占用请求确定每个 D2D终端的业务需求, 根据每个 D2D终端的业 务需求确定该多个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端。
较佳地, 所述网络侧设备向所述能够占用所述 D2D通信资源发送数据的 D2D终端发 送指示信令, 以指示该 D2D终端在所述 D2D通信资源上发送数据, 具体包括:
网络侧设备在子帧 n-k上向所述能够占用所述 D2D通信资源发送数据的 D2D终端发 送指示信令, 以指示该 D2D终端在子帧 n上发送数据; 其中, 子帧 n为所述 D2D通信资 源包括的子帧, k为不小于 1的整数, 且 k的取值满足以下条件: k个子帧的时间长度大 于预先设定的 D2D发送预处理的时间。
较佳地, 子帧 n与子帧 n-k遵守长期演进 LTE系统中定义的传输调度时序关系;或者, 子帧 n-k是与子帧 n相邻的 D2D子帧。
较佳地, 所述 D2D发送预处理的时间包括: D2D终端对所述指示信令的检测时间、 D2D终端收发信机转换的时间、数据包成帧的时间、物理层发送处理的时间中的至少一个。
较佳地, 所述网络侧设备向所述能够占用所述 D2D通信资源发送数据的 D2D终端发 送指示信令, 以指示该 D2D终端在所述 D2D通信资源上发送数据, 具体包括:
网络侧设备通过物理下行控制信道 PDCCH向所述能够占用所述 D2D通信资源发送数 据的 D2D终端发送下行控制信息 DCI,以指示该 D2D终端在所述 D2D通信资源上发送数 据; 或者,
网络侧设备通过专用于指示 D2D链路资源占用的物理信道资源,向所述能够占用所述 D2D通信资源发送数据的 D2D终端发送指示信令, 以指示该 D2D终端在所述 D2D通信 资源上发送数据。
较佳地, 所述网络侧设备通过专用于指示 D2D链路资源占用的物理信道资源,向所述 能够占用所述 D2D通信资源发送数据的 D2D终端发送指示信令,以指示该 D2D终端在所 述 D2D通信资源上发送数据 , 具体包括:
网络侧设备在预先为所述能够占用所述 D2D通信资源发送数据的 D2D终端配置的专 用物理混合自动请求重传指示信道 PHICH资源上,向该 D2D终端发送资源占用指示信息, 以指示该 D2D终端在所述 D2D通信资源上发送数据; 或者,
网络侧设备在预先为所述能够占用所述 D2D通信资源发送数据的 D2D终端配置的专 用 D2D指示信道资源上, 向该 D2D终端发送资源占用指示信息, 以指示该 D2D终端在所 述 D2D通信资源上发送数据。
较佳地, 每个 D2D终端的专用 D2D指示信道资源通过码分或频分或时分的方式复用 在相同的时频资源中。
较佳地, 所述专用 D2D指示信道资源位于物理下行共享信道 PDSCH区域中的至少一 个物理资源块 PRB上。
较佳地, 在网络侧设备在预先为所述能够占用所述 D2D通信资源发送数据的 D2D终 端配置的专用 PHICH资源上, 向该 D2D终端发送资源占用指示信息, 以指示该 D2D终端 在所述 D2D通信资源上发送数据时, 进一步包括:
网络侧设备若确定发送物理上行共享信道 PUSCH传输对应的肯定应答 /否定应答 ACK/NACK信息所使用的 PHICH资源的位置, 与发送所述资源占用指示信息所使用的专 用 PHICH资源的位置重叠, 则放弃在该专用 PHICH资源上发送所述 ACK/NACK信息, 并在发送用于调度下一次 PUSCH传输的 DCI时,使用该 DCI中的新数据指示 NDI域指示 是否正确接收 PUSCH数据。
一种 D2D通信中的数据发送方法, 该方法包括:
D2D终端向网络侧设备发送对 D2D通信资源的资源占用请求, 以使所述网络侧设备 才 据共享所述 D2D通信资源的至少一个 D2D终端发送的资源占用请求, 确定所述至少一 个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端;
当 D2D终端接收到网络侧设备发送的指示信令时, 所述 D2D终端根据该指示信令在 所述 D2D通信资源上发送数据。
较佳地, 还包括:
当 D2D终端未接收到网络侧设备发送的指示信令时,所述 D2D终端在所述 D2D通信 资源上接收数据。
较佳地, 所述资源占用请求包括:
D2D终端在网络侧为自身配置的用于 D2D链路的专属调度请求 SR资源上发送的 SR, 该 SR用于表示该 D2D终端需要在 D2D链路上传输数据; 和 /或,
D2D终端在网络侧调度的物理上行共享信道 PUSCH资源上发送的针对 D2D通信的緩 存区状态 4艮告 BSR, 该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输的数据量。
较佳地, 所述当 D2D终端接收到网络侧设备发送的指示信令时, D2D终端根据该指 示信令在所述 D2D通信资源上发送数据 , 具体包括:
当 D2D终端接收到网络侧设备发送的指示信令时, 所述 D2D终端在子帧 n-k上接收 网络侧设备发送的指示信令,根据指示信令在子帧 n上发送数据;其中,子帧 n为所述 D2D 通信资源包括的子帧, k为不小于 1的整数, 且 k的取值满足以下条件: k个子帧的时间 长度大于预先设定的 D2D发送预处理的时间。
较佳地, 子帧 n与子帧 n-k遵守长期演进 LTE系统中定义的传输调度时序关系;或者, 子帧 n-k是与子帧 n相邻的 D2D子帧。
较佳地, 所述 D2D发送预处理的时间包括: D2D终端对所述指示信令的检测时间、
D2D终端收发信机转换的时间、数据包成帧的时间、物理层发送处理的时间中的至少一个。 较佳地, 还包括:所述 D2D终端通过物理下行控制信道 PDCCH接收网络侧设备发送 的下行控制信息 DCI;
所述 D2D终端才 居该指示信令在所述 D2D通信资源上发送数据具体包括: 所述 D2D 终端根据该 DCI在所述 D2D通信资源上发送数据;
或者,
所述方法还包括: 所述 D2D终端通过专用于指示 D2D链路资源占用的物理信道资源 接收网络侧设备发送的指示信令;
所述 D2D终端才 居该指示信令在所述 D2D通信资源上发送数据具体包括: 所述 D2D 终端根据该指示信令在所述 D2D通信资源上发送数据。
较佳地, 所述 D2D终端通过专用于指示 D2D链路资源占用的物理信道资源接收网络 侧设备发送的指示信令具体包括: 所述 D2D终端在预先为该 D2D终端配置的专用物理混 合自动请求重传指示信道 PHICH资源上, 接收网络侧设备发送的资源占用指示信息; 所述 D2D终端根据该指示信令在所述 D2D通信资源上发送数据具体包括: 根据该资 源占用指示信息在所述 D2D通信资源上发送数据;
或者,
所述 D2D终端通过专用于指示 D2D链路资源占用的物理信道资源接收网络侧设备发 送的指示信令具体包括:所述 D2D终端在预先为该 D2D终端配置的专用 D2D指示信道资 源上, 接收网络侧设备发送的资源占用指示信息;
所述 D2D终端根据该指示信令在所述 D2D通信资源上发送数据具体包括: 根据该资 源占用指示信息在所述 D2D通信资源上发送数据。
较佳地, 每个 D2D终端的专用 D2D指示信道资源通过码分或频分或时分的方式复用 在相同的时频资源中。
较佳地, 所述专用 D2D指示信道资源位于 PDSCH区域中的至少一个物理资源块 PRB 上。
一种基站, 该基站包括:
接收单元, 用于接收至少一个 D2D终端发送的对 D2D通信资源的资源占用请求, 所 述至少一个 D2D终端为共享所述 D2D通信资源的 D2D终端;
确定单元,用于才 居所述资源占用请求,确定所述至少一个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端;
发送单元, 用于向所述能够占用所述 D2D通信资源发送数据的 D2D终端发送指示信 令, 以指示该 D2D终端在所述 D2D通信资源上发送数据。
较佳地, 所述接收单元将接收到的每个 D2D终端发送的资源占用请求包括:
该 D2D终端在网络侧为自身配置的用于 D2D链路的专属调度请求 SR资源上发送的 SR, 该 SR用于表示该 D2D终端需要在 D2D链路上传输数据; 和 /或,
该 D2D终端在网络侧调度的物理上行共享信道 PUSCH资源上发送的针对 D2D通信 的緩存区状态报告 BSR,该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输的数据 量。
较佳地, 所述确定单元用于:
若接收到一个 D2D终端发送的资源占用请求, 则确定发送资源占用请求的 D2D终端 是能够占用所述 D2D通信资源发送数据的一个 D2D终端;
若接收到多个 D2D终端发送的资源占用请求,则根据终端轮询占用资源的原则,确定 该多个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端, 或者,根据接 收到的资源占用请求确定每个 D2D终端的业务需求, 据每个 D2D终端的业务需求确定 该多个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端。
较佳地, 所述发送单元用于:
在子帧 n-k上向所述能够占用所述 D2D通信资源发送数据的 D2D终端发送指示信令, 以指示该 D2D终端在子帧 n上发送数据; 其中, 子帧 n为所述 D2D通信资源包括的子帧, k为不小于 1的整数,且 k的取值满足以下条件: k个子帧的时间长度大于预先设定的 D2D 发送预处理的时间。
较佳地, 子帧 n与子帧 n-k遵守长期演进 LTE系统中定义的传输调度时序关系;或者, 子帧 n-k是与子帧 n相邻的 D2D子帧。
较佳地, 所述 D2D发送预处理的时间包括: D2D终端对所述指示信令的检测时间、 D2D终端收发信机转换的时间、数据包成帧的时间、物理层发送处理的时间中的至少一个。
较佳地, 所述发送单元包括第一单元或第二单元:
第一单元,用于通过物理下行控制信道 PDCCH向所述能够占用所述 D2D通信资源发 送数据的 D2D终端发送下行控制信息 DCI,以指示该 D2D终端在所述 D2D通信资源上发 送数据;
第二单元,用于通过专用于指示 D2D链路资源占用的物理信道资源, 向所述能够占用 所述 D2D通信资源发送数据的 D2D终端发送指示信令, 以指示该 D2D终端在所述 D2D 通信资源上发送数据。
较佳地, 所述第二单元用于:
在预先为所述能够占用所述 D2D通信资源发送数据的 D2D终端配置的专用物理混合 自动请求重传指示信道 PHICH资源上, 向该 D2D终端发送资源占用指示信息, 以指示该
D2D终端在所述 D2D通信资源上发送数据; 或者,
在预先为所述能够占用所述 D2D通信资源发送数据的 D2D终端配置的专用 D2D指示
信道资源上, 向该 D2D终端发送资源占用指示信息, 以指示该 D2D终端在所述 D2D通信 资源上发送数据。
较佳地, 每个 D2D终端的专用 D2D指示信道资源通过码分或频分或时分的方式复用 在相同的时频资源中。
较佳地, 所述专用 D2D指示信道资源位于 PDSCH区域中的至少一个物理资源块 PRB 上。
较佳地, 该基站还包括:
资源冲突处理单元, 用于在预先为所述能够占用所述 D2D通信资源发送数据的 D2D 终端配置的专用 PHICH资源上, 向该 D2D终端发送资源占用指示信息, 以指示该 D2D终 端在所述 D2D通信资源上发送数据时,若确定发送物理上行共享信道 PUSCH传输对应的 肯定应答 /否定应答 ACK/NACK信息所使用的 PHICH资源的位置, 与发送所述资源占用 指示信息所使用的专用 PHICH资源的位置重叠, 则放弃在该专用 PHICH资源上发送所述 ACK/NACK信息, 并在发送用于调度下一次 PUSCH传输的 DCI时, 使用该 DCI中的新 数据指示 DI域指示是否正确接收 PUSCH数据。
一种基站, 该基站包括处理器和存储器:
该处理器被配置为执行具有下列功能的计算机程序:接收至少一个 D2D终端发送的对 D2D通信资源的资源占用请求,所述至少一个 D2D终端为共享所述 D2D通信资源的 D2D 终端; 才 居所述资源占用请求, 确定所述至少一个 D2D终端中能够占用所述 D2D通信资 源发送数据的一个 D2D终端;向所述能够占用所述 D2D通信资源发送数据的 D2D终端发 送指示信令, 以指示该 D2D终端在所述 D2D通信资源上发送数据;
该存储器被配置为保存上述计算机程序的代码。
某些情况下, 处理器执行上述计算机程序实现的功能可以由处理器和基带处理器执行 的计算机程序配合实现。
一种终端, 该终端包括:
请求单元,用于向网络侧设备发送对 D2D通信资源的资源占用请求, 以使所述网络侧 设备才 居共享所述 D2D通信资源的至少一个 D2D终端发送的资源占用请求, 确定所述至 少一个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端;
通信单元, 用于当接收到网络侧设备发送的指示信令时, 根据所述指示信令在所述 D2D通信资源上发送数据。
较佳地, 所述通信单元还用于:
当未接收到网络侧设备发送的指示信令时, 在所述 D2D通信资源上接收数据。
较佳地, 所述资源占用请求包括:
该 D2D终端在网络侧为自身配置的用于 D2D链路的专属调度请求 SR资源上发送的
SR, 该 SR用于表示该 D2D终端需要在 D2D链路上传输数据; 和 /或,
该 D2D终端在网络侧调度的物理上行共享信道 PUSCH资源上发送的针对 D2D通信 的緩存区状态报告 BSR,该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输的数据 量。
较佳地, 所述通信单元用于: 当接收到网络侧设备发送的指示信令时, 在子帧 n-k上 接收网络侧设备发送的指示信令; 根据所述指示信令在子帧 n上发送数据;
其中, 子帧 n为所述 D2D通信资源包括的子帧, k为不小于 1的整数, 且 k的取值满 足以下条件: k个子帧的时间长度大于预先设定的 D2D发送预处理的时间。
较佳地, 子帧 n与子帧 n-k遵守长期演进 LTE系统中定义的传输调度时序关系;或者, 子帧 n-k是与子帧 n相邻的 D2D子帧。
较佳地, 所述 D2D发送预处理的时间包括: D2D终端对所述指示信令的检测时间、 D2D终端收发信机转换的时间、数据包成帧的时间、物理层发送处理的时间中的至少一个。
较佳地, 所述通信单元包括: 第一接收单元, 用于通过物理下行控制信道 PDCCH接 收网络侧设备发送的下行控制信息 DCI; 第一发送单元, 用于根据该 DCI在所述 D2D通 信资源上发送数据; 或者,
所述通信单元包括: 第二接收单元,用于通过专用于指示 D2D链路资源占用的物理信 道资源接收网络侧设备发送的指示信令; 第二发送单元, 用于根据该指示信令在所述 D2D 通信资源上发送数据。
较佳地, 所述第二接收单元用于:在预先为该 D2D终端配置的专用物理混合自动请求 重传指示信道 PHICH 资源上, 接收网络侧设备发送的资源占用指示信息; 所述第二发送 单元用于: 根据该资源占用指示信息在所述 D2D通信资源上发送数据; 或者,
所述第二接收单元用于: 在预先为该 D2D终端配置的专用 D2D指示信道资源上, 接 收网络侧设备发送的资源占用指示信息; 所述第二发送单元用于: 才 居该资源占用指示信 息在所述 D2D通信资源上发送数据。
较佳地, 每个 D2D终端的专用 D2D指示信道资源通过码分或频分或时分的方式复用 在相同的时频资源中。
较佳地,所述专用 D2D指示信道资源位于 PDSCH区域中的至少一个物理资源块 PRB 上。
一种终端, 该终端包括处理器和存储器:
该处理器被配置为执行具备下列功能的计算机程序:向网络侧设备发送对 D2D通信资 源的资源占用请求, 以使所述网络侧设备根据共享所述 D2D通信资源的至少一个 D2D终 端发送的资源占用请求, 确定所述至少一个 D2D终端中能够占用所述 D2D通信资源发送 数据的一个 D2D终端; 当接收到网络侧设备发送的指示信令时,根据所述指示信令在所述
D2D通信资源上发送数据;
该存储器被配置为保存上述计算机程序的代码。
某些情况下, 处理器执行上述计算机程序实现的功能可以由处理器和基带处理器执行 的计算机程序配合实现。
本申请实施例提供的方案中, 网络侧设备接收至少一个 D2D终端发送的对相同 D2D 通信资源的资源占用请求后,根据接收到的资源占用请求确定该至少一个 D2D终端中能够 占用该 D2D通信资源发送数据的一个 D2D终端,并向确定的能够占用该 D2D通信资源发 送数据的 D2D终端发送指示信令, 该 D2D终端接收到该指示信令后根据该指示信令在该 D2D通信资源上发送数据。 本方案中, 各 D2D终端在需要占用 D2D通信资源发送数据时 向网络侧设备发送资源占用请求,网络侧设备则根据一定的策略确定能够占用 D2D通信资 源发送数据的 D2D终端, 并指示确定的 D2D终端在该 D2D通信资源上发送数据, 通过将 资源占用者的决定权交由网络侧设备行使 , 可以避免多个 D2D终端竟争同一 D2D通信资 源时所造成的资源占用冲突的问题, 进而降低了 D2D通信中资源占用冲突的概率。 附图说明 图 1为现有技术中的 N2D link和 D2D link示意图;
图 2为现有技术中的 D2D通信半静态的资源配置示意图;
图 3为现有技术中的蜂窝网络中终端通信的数据流程示意图;
图 4为现有技术中的终端直连通信的数据流程示意图;
图 5为本申请实施例中的一个 PHICH组在控制区域的资源映射示意图;
图 6为本申请实施例提供的方法流程示意图;
图 7a为本申请实施例中釆用 PHICH的实现方式定义 D2D指示信道的示意图; 图 7b为本申请实施例中釆用 PUCCH的实现方式定义 D2D指示信道的示意图; 图 8a为本申请实施例提供的另一方法流程示意图;
图 8b为本申请实施例中的资源配置示意图;
图 9为本申请实施例提供的一种基站结构示意图;
图 10为本申请实施例提供的另一种基站结构示意图;
图 11为本申请实施例提供的一种终端结构示意图;
图 12为本申请实施例提供的另一种终端结构示意图。 具体实施方式
LTE D2D技术是指工作在 LTE授权频段上的受 LTE网络控制的 D2D通信。一方面可
以充分发挥 D2D技术的优势,同时 LTE网络的控制也可以克服传统 D2D技术的一些问题, 例如千扰不可控等。 LTE D2D特性的引入将使 LTE技术从单纯的无线移动蜂窝通信技术向 着通用连接技术 ( Universal Connectivity Technology ) 的方向演进。
将 D2D通信引入到 LTE的授权频带上时, D2D通信链路将与蜂窝通信共享无线资源, 这也是在蜂窝系统中融合 D2D 通信技术的最基本问题。 无线资源的共享方式可以分为两 种: 正交方式的共享和复用方式的共享。 釆用正交方式进行无线资源共享是指在无线资源 使用上以静态或动态的方式对无线资源进行正交分割 ,使蜂窝通信和 D2D通信使用相互正 交的资源。釆用复用方式进行无线资源共享是指 D2D通信以合理的方式对正在使用的蜂窝 资源进行共享重用, 并将千扰限制在一定水平范围内。
在 D2D 的通信中, 除了用户之间的一对一的通信方式之外, 典型的应用场景还包括 D2D用户之间进行群组 /广播通信, 其实现的方式可以如下:
一个 UE通过单次传输给一个通信群组里的所有 UE发送相同数据 (群组通信 );
一个 UE通过单次传输给授权的所有附近的 UE发送相同数据 (广播通信)。
群组 /广播通信场景可以用于公共安全应用中的消防、 救援和反恐等。
调度请求( Scheduling Request, SR )用于请求基站调度 UE进行上行传输, 在长期演 进 ( Long Term Evolution, LTE ) /长期演进升级 ( Long Term Evolution- Advanced, LTE-A ) 系统中, 基站对进入无线资源控制 (Radio Resource Control, RRC ) 连接状态的 UE配置 一个专用的周期性的 SR 资源, 其对应的物理信道是物理上行控制信道(Physical Uplink Control Channel , PUCCH )格式( format ) 1/la/lb的资源。
緩存区状态 4艮告 ( Buffer status Report, BSR )用于上 4艮 UE 当前上行传输的緩存区 ( buffer )中包含的数据量的大小, 用于协助基站调度 UE的上行传输时资源的分配。 在媒 体接入控制 (Medium Access Control, MAC )层分别定义了两种 BSR, 分别为: 长 BSR 和短 BSR, 其中长 BSR上报 4个逻辑信道组的 buffer状态信息, 短 BSR仅上报一个逻辑 信道组的 BSR。 BSR的上报是通过事件触发的, 例如: 可以是高优先级的数据到达, 或者 周期性的 BSR上报定时器超时等事件。 BSR通过基站调度的 PUSCH承载。
在 LTE版本 10 ( Rel-10 ) 系统中, 物理混合自动请求重传指示信道 ( Physical HARQ Indication Channel , PHICH )相关的定义如下:
PHICH用于承载上行业务的反馈信息即肯定应答 /否定应答(ACK/NACK )信息。 一
, ( nsmup nseq ) ^gr up
个 PHICH的资源指示主要通过一个参数对〖 PHICH, PHICH〗指示, 其中" pmcH 是 PHICH组
( group ) 的编号, "PfflCH 是正交序列的索引。
PHICH group的概念指的是一组资源单元(Resource Element, RE ) 的集合, 在这个
RE的集合中可以传输 8个 PHICH, 各个 PHICH之间通过正交序列进行区分。 对于常规
( Normal ) CP来说有 8个正交序列, 那么一个 PHICH group中有 8个 PHICH。 对于扩展
( Extended ) CP来说有 4个正交序列, 那么一个 PHICH group中有 4个 PHICH。
系统中 PHICH group的个数可以通过如下的方式进行确定:
其中 G {1/6, 1/2,1, 2}是由高层提供, 索引 "S[U C P H的编号是从 0到 - 1。
对于 TDD系统, 也就是帧结构类型 2, PHICH group的个数在各个下行子帧中是可以
¾ rgroup ¾ rgroup
不同的, 并且通过 ' ' VPHicH给出, 其中 '的值参见 36.211 中的定义, 使通过上面 group ¾ rgroup 的帧结构类型 1中给出的表达式进行计算, 索引 "PfflCH的编号是从 0到 ' ^PffiCH 。
PHICH映射在 PDCCH控制区域中物理控制格式指示信道(Physical Control Format Indication Channel, PCFICH ) 未使用的资源单元组( Resource Element Group , REG )上, 其在时域映射的持续时间可由系统进行配置, 并由系统广播通知。 常规的 PHICH 时域资 源配置( Normal PHICH Duration )情况下, PHICH映射在下行子帧的第一个正交频分复用 ( Orthogonal Frequency Division Multiplexing , OFDM )符号上, 可以支持较少的用户数量 和小覆盖的场景; 而扩展的 PHICH时域资源配置( Extended PHICH Duration )情况下, 每 个 PHICH组映射在下行子帧的前 3 个 OFDM符号上, 在多媒体广播多播业务单频网络 ( Multimedia Broadcast multicast service Single Frequency Network , MB SFN )子巾贞和 TD-LTE 子帧 1和子帧 6中映射在前 2个 OFDM符号上,用于支持较大的覆盖半径或较多用户数量 的场景。 同时, 小区中的 PHICH组数也有 4种不同的等级的配置即( G ' 112 ' ^ 2} ), 该配置通过系统广播通知, 用于支持不同的用户容量。
一个 PHICH组在控制区域占用的 3个 REG在时频域的分布有所不同, 目标是获得最 大的时间和频率分集增益, 如图 5所示。 图 5中给出了一个 PHICH组资源映射的示意图。 一个 PHICH group 占用的时频资源与 REG的个数、 小区 ID、 PHICH组序号以及具体的 OFDM符号序号等有关。
UE在物理上行共享信道( Physical Uplink Shared Channel, PUSCH )发送上行数据时, 该上行数据对应的 ACK/NACK信息在下行子帧中的 PHICH中携带, 对于在子帧 n中调 度的 PUSCH 传输, UE 在子帧 " + 腦中的对应的 PHICH 资源接收基站反馈的 ACK/NACK信息, 其中在 FDD系统中 = 4 , 对于 TDD系统 参见 36.213中的 定义。
PHICH的资源是才艮据 PDCCH的下行控制信息 ( Downlink Control Information, DCI ) 格式 0中的 PUSCH传输许可中指示的行分配的资源中最低的 PRB序号以及 3bits指示的 上行解调参考符号 (Demodulation Reference Symbol, DMRS ) 的循环移位共同决定。
group seq 、 group , seq
PHICH资源由一对编号、nPHicH , n icH )标识, 其中 " c/i是 PHICH组序号;
-组内的正交序列编号。 这两个编号的具体计算公式为:
nPHICH = ^PRB RA + nDMRS ) m°^NPHICH + 1 PHICH ^PHICH
n + /7
PHICH •DMRS) moA 2N ICH
"DMRS是与 PHICH对应的上行传输中使用的 DMRS循环移位值, 通过 DCI format 0中 的 DMRS域中循环移位信息映射, 具体如下面的表 1。 对于在子帧 n传输的 PUSCH, 如 果没有对应的上行调度指令即 DCI format 0, 或者该 PUSCH传输是由随机接入响应调度 时, NDMRS设为 0;
NSF 是在 36.211中定义的 PHICH调制的扩频因子大小;
对于 PDCCH指示的 PUSCH的第一个传输块 (TB) , 或者在没有对应的 PDCCH情况下, 且收到的 NACK的个数 PRB RA
I PRB RA 与最近 PDCCH调度的 PUSCH中的 TB个数不等的情况下 PRB RA 对于 PDCCH指示的 PUSCH的第二个 TB
lowest index
是相应的 PUSCH传输第一个时隙分配的最低的 PRB序号;
group
是由高层信令配置的 PHICH组个数;
|1 当 TDD UL/DL配置为 0时, 并且 在子帧 η=4或 η=9
' PHICH
0 其它情况 .
表 1 从 PHICH资源确定的计算方法可以看出, PHICH资源冲突避免可以通过调整 PUSCH
传输的 PRB的起始位置, 和 /或调整 PUSCH传输中的 DMRS循环移位指示标识的方式实 现。
PHICH 承载的 PUSCH 的 ACK/NACK信息, 称之为混合自动重传请求 (Hybrid Automatic Repeat reQuest, HARQ )指示 (HARQ indicator, HI ), 其中 0表示 NACK, 1 表示 ACK。 HI首先釆用 3比特的重复编码, 具体如下表 2所示:
HI码字经过二进制相移键控(Binary Phase Shift Keying, BPSK ) 的调制, 然后逐符 号的进行序列扩展, 其中每个比特扩展为 " cff指示的正交序列。 然后按照 36.211 中 6.9 章节的内容进行天线化处理和映射。
为了降低 D2D通信中资源占用冲突的概率, 本申请实施例提供一种 D2D通信中的数 据发送方法。
参见图 6, 本申请实施例提供的 D2D通信中的数据发送方法, 包括以下步骤: 步骤 60:网络侧设备接收至少一个 D2D终端发送的对 D2D通信资源的资源占用请求, 该至少一个 D2D终端为共享该 D2D通信资源的 D2D终端;
步骤 61: 网络侧设备根据接收到的资源占用请求, 确定该至少一个 D2D终端中能够 占用该 D2D通信资源发送数据的一个 D2D终端;
步骤 62: 网络侧设备向确定的能够占用该 D2D通信资源发送数据的 D2D终端发送指 示信令, 以指示该 D2D终端在该 D2D通信资源上发送数据。
具体的, 每个 D2D终端发送的资源占用请求可以包括: 该 D2D终端在网络侧为自身 配置的用于 D2D链路的专属调度请求( SR )资源上发送的 SR, 该 SR用于表示该 D2D终 端需要在 D2D链路上传输数据; 或者, 该 D2D终端在网络侧为自身配置的用于 D2D链路 的专属 SR资源上发送的 SR, 该 SR用于表示该 D2D终端需要在 D2D链路上传输数据, 以及该 D2D终端在网络侧调度的物理上行共享信道(PUSCH )资源上发送的针对 D2D通 信的緩存区状态 4艮告 ( BSR ), 该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输 的数据量;或者,该 D2D终端在网络侧调度的 PUSCH资源上发送的针对 D2D通信的 BSR, 该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输的数据量。
这里, 网络侧为 D2D终端配置的用于 D2D链路的专属 SR资源, 是指网络侧为 D2D 终端配置的仅用于该 D2D终端通过 D2D链路发送 SR的资源。
网络侧需要对系统中的每个 D2D 终端均配置一个专属 SR资源。对于同一组内的 D2D 终端需要配置不同的专属 SR资源,从而可以区分不同的 D2D终端。对于不同组内的 D2D 终端, 其专属 SR资源的频域位置可以相同或不同, 但是时间位置需要不同。 专属 SR资源 可以占用物理上行控制信道(PUCCH )格式 (format ) 1/la/lb的资源。
具体的, 步骤 61中网络侧设备才 居资源占用请求确定所述至少一个 D2D终端中能够 占用所述 D2D通信资源发送数据的一个 D2D终端, 具体实现可以如下:
网络侧设备若接收到一个 D2D终端发送的资源占用请求,则确定发送资源占用请求的 D2D终端是能够占用该 D2D通信资源发送数据的一个 D2D终端; 这里, 网络侧设备在接 收到一个 D2D终端发送的资源占用请求时,需要确定该 D2D终端是占用该 D2D通信资源 发送数据或是在该 D2D通信资源上接收数据, 若是占用该 D2D通信资源发送数据, 则向 该 D2D终端发送指示信令, 以通知该 D2D终端占用该 D2D通信资源发送数据, 若是在该 D2D通信资源上接收数据, 则可以不向该 D2D终端发送指示信令。
网络侧设备若接收到多个 D2D终端发送的资源占用请求,则根据终端轮询占用资源的 原则,确定该多个 D2D终端中能够占用该 D2D通信资源发送数据的一个 D2D终端,或者, 根据接收到的资源占用请求确定每个 D2D终端的业务需求, 根据每个 D2D终端的业务需 求确定该多个 D2D终端中能够占用该 D2D通信资源发送数据的一个 D2D终端。 具体的, 可以根据接收到的 BSR中包含的緩存区的状态、业务优先级、业务时延中的至少一个信息 确定对应 D2D终端的业务需求, 居每个 D2D终端的业务需求确定该多个 D2D终端中能 够占用该 D2D通信资源发送数据的 D2D终端; 例如, 在根据 B SR中包含的緩存区的状态 确定对应 D2D终端需要传输的数据量最大时,可以确定该 D2D终端是能够占用该 D2D通 信资源发送数据的 D2D终端; 或者, 在根据 BSR中包含的业务优先级确定该 D2D终端的 业务优先级最高时,可以确定该 D2D终端是能够占用该 D2D通信资源发送数据的 D2D终 端; 或者, 在根据 BSR中包含的业务时延确定该 D2D终端的业务时延要求最高时, 可以 确定该 D2D终端是能够占用该 D2D通信资源发送数据的 D2D终端, 等等。具体策略可以 灵活制定。
具体的, 步骤 62中网络侧设备向能够占用 D2D通信资源发送数据的 D2D终端发送指 示信令, 以指示该 D2D终端在该 D2D通信资源上发送数据, 具体实现可以如下:
网络侧设备在子帧 n-k上向能够占用该 D2D通信资源发送数据的 D2D终端发送指示 信令, 以指示该 D2D终端在子帧 n上发送数据; 其中, 子帧 n为该 D2D通信资源包括的 子帧, k为不小于 1的整数, 且 k的取值满足以下条件: k个子帧的时间长度大于预先设 定的 D2D发送预处理的时间。 举例说明:
例 1 :子帧 n与子帧 n-k遵守 LTE系统中定义的传输调度时序关系(具体可以参见 LTE 协议 RS36.213 ), 即子帧 n与子帧 n-k的时序关系, 与 LTE系统中发送 PUSCH数据的子
帧 n与发送该 PUSCH数据的调度信令的子帧 n-k的时序关系相同, 在 FDD系统中, k的 取值固定为 4 , 在 TDD系统中, k的取值与 TDD上下行配置相关。
例 2: 子帧 n-k是与子帧 n相邻的 D2D子帧, 且子帧 n-k与子帧 n之间的时间间隔大 于 D2D发送预处理的时间。 也即, 在 D2D子帧 n之前的一个 D2D子帧 i中发送所述指示 信令, D2D子帧 n与 D2D子帧 i之间的间隔 k=n-i, k需要至少大于 D2D发送预处理的时 间, 如果相邻的两个 D2D子帧之间的间隔大于 D2D发送预处理的时间, 那么相当于前一 个 D2D子帧用于指示 D2D终端占用下一个 D2D子帧发送数据。
具体的, D2D发送预处理的时间可以包括: D2D 终端对指示信令的检测时间、 D2D 终端收发信机转换的时间、 数据包成帧的时间、 物理层发送处理的时间中的至少一个。 数 据包成帧的时间表示无线链路控制 (RLC )层和媒体接入控制 (MAC )层按照帧格式组成 数据帧的过程中的处理时间, 物理层发送处理的时间表示物理层对数据进行调制、 编码以 及资源映射等的处理时间。
具体的,步骤 62中, 网络侧设备向能够占用该 D2D通信资源发送数据的 D2D终端发 送指示信令, 以指示该 D2D终端在该 D2D通信资源上发送数据, 具体实现可以如下: 网络侧设备通过物理下行控制信道( PDCCH ) 向能够占用该 D2D通信资源发送数据 的 D2D终端发送下行控制信息 (DCI ), 以指示该 D2D终端在该 D2D通信资源上发送数 据;该 DCI可以使用能够占用该 D2D通信资源发送数据的 D2D终端的 C-RNTI进行加扰, 以使该 D2D终端能够检测到该 DCI。 该方式较适用于动态调度情况下; 或者,
网络侧设备通过专用于指示 D2D链路资源占用的物理信道资源, 向能够占用该 D2D 通信资源发送数据的 D2D终端发送指示信令,以指示该 D2D终端在该 D2D通信资源上发 送数据。
在网络侧设备通过专用于指示 D2D链路资源占用的物理信道资源,向能够占用该 D2D 通信资源发送数据的 D2D终端发送指示信令,以指示该 D2D终端在该 D2D通信资源上发 送数据时, 具体可以釆用如下两种方式:
第一, 网络侧设备在预先为能够占用该 D2D通信资源发送数据的 D2D终端配置的专 用物理混合自动请求重传指示信道( PHICH )资源上, 向该 D2D终端发送资源占用指示信 息, 以指示该 D2D终端在该 D2D通信资源上发送数据; 本方法中, 沿用现有的 PHICH的 定义, 为每个 D2D终端配置一个专用 PHICH资源, 相当于给每个 D2D终端配置了一个 PHICH资源的 ,nU索引, 如果在 D2D子帧 n之前的子帧 n-k中, 专用 PHICH 资源中承载的是 "1" , 那么表示该 PHICH资源对应的 D2D终端的资源占用指示置位, 该 PHICH资源对应的 D2D终端可以在 D2D子帧 n中发送数据。
第二, 网络侧设备在预先为能够占用该 D2D通信资源发送数据的 D2D终端配置的专 用 D2D指示信道资源上, 向该 D2D终端发送资源占用指示信息, 以指示该 D2D终端在该
D2D通信资源上发送数据。
这里,专用 D2D指示信道是新定义的物理信道, 即与现有技术中物理信道不同的物理 信道, 每个 D2D终端的专用 D2D指示信道资源可以通过码分或频分或时分的方式复用在 相同的时频资源中。例如:专用 D2D指示信道资源可以位于 PDSCH区域中的至少一个 PRB 上, 即将 LTE系统的下行 PDSCH区域中的至少一个 PRB对(pair )配置为 D2D指示信道 占用的资源, 专用 D2D指示信道可以釆用类似于 LTE系统中 PHICH的定义方式, 或者 PUCCH的定义方式。 如果在 D2D子帧 n之前的子帧 n-k中, 某一个专用 D2D指示信道资 源置位(即承载的信息是 "1" ), 那么表示该专用 D2D指示信道资源对应的 D2D终端的资 源占用指示置位,该专用 D2D指示信道资源对应的 D2D终端可以在 D2D子帧 n中发送数 据。
举例说明, 在专用 D2D指示信道釆用类似于 LTE系统中 PUCCH的定义方式时, 基 站配置一个或者多个 PRB pair作为专用 D2D指示信道占用的资源, 其中将每个 PRB pair 中的 PDSCH区域的 RE按照 4个 RE—组进行分组,每个分组称之为 D2D-REG, D2D-REG 类似于 PHICH中的 REG, 三个 D2D_REG构成一个 D2D指示信道组, 其中一个 D2D指 示信道组中的三个 D2D-REG通过交织的方式尽可能分散到不同的 PRB pair中。 其它的可 以沿用 PHICH的处理方式。 其中一个 PRB pair中 D2D-REG的构成可以如图 7a所示的标 有 R7和 R9的 RE。
又例如, 基站配置一个或者多个 PRB pair作为专用 D2D指示信道占用的资源, 将一 个调制符号, 首先在频域上扩展到整个 PRB中, 也就是进行类似于 PUCCH的频域上的循 环序列的扩展, 扩展为 12个 RE, 然后进行时域上正交序列的扩展, 扩展的长度为 m, m 的长度需要小于等于一个子帧中可用于 PDSCH传输的 OFDM符号个数, 正交扩展的过程 类似于 PUCCH的正交扩展的过程。 对于相同 PRB pair中的不同信道资源的复用是通过序 列区分的。 在资源映射的过程中, 如果专用 D2D指示信道的 RE与 CRS等其它符号占用 的 RE冲突, 可以忽略掉 D2D指示信道的 RE。 具体的频域扩展和时域扩展的示意图如图 7b所示。
较佳的, 在釆用上述第一种方式时, 即网络侧设备在预先为能够占用该 D2D通信资 源发送数据的 D2D终端配置的专用 PHICH资源上,向该 D2D终端发送资源占用指示信息, 以指示该 D2D终端在该 D2D通信资源上发送数据时, 网络侧设备若确定发送 PUSCH传 输对应的 ACK/NACK信息所使用的 PHICH资源的位置,与发送该资源占用指示信息所使 用的专用 PHICH资源的位置重叠, 则放弃在该专用 PHICH资源上发送该 ACK/NACK信 息, 并在发送用于调度下一次 PUSCH传输的 DCI时, 使用该 DCI中的新数据指示( NDI ) 域指示是否正确接收 PUSCH数据。
较佳的, 在釆用上述第一种方式时, 可以通过在系统中配置更多的 PHICH 资源, 一
部分 PHICH资源用于真正的 PUSCH的 ACK/NACK的传输; 另一部分 PHICH资源用于 D2D终端资源占用的指示信令。 网络侧设备可以通过 PHICH资源冲突避免的机制, 尽可 能的避免真正用于 PUSCH的 ACK/NACK的 PHICH资源与表示 D2D终端资源占用的指示 信令的 PHICH资源之间的冲突。 PHICH资源冲突避免的机制可以通过调整 PUSCH传输的 PRB的起始位置和 /或调整 PUSCH传输中的 DMRS循环移位指示标识等方式实现。具体的, 网络侧设备在调度能够占用该 D2D通信资源发送数据的 D2D终端, 通过 PUSCH发送上 行数据前, 根据该 D2D终端进行 PUSCH传输所使用的 PRB的起始位置和 DMRS循环移 位指示标识确定后续网络侧设备向该 D2D终端进行 ACK/NACK反馈时所使用的 PHICH 资源的位置, 若该 PHICH资源的位置与发送该资源占用指示信息所使用的专用 PHICH资 源的位置重叠, 则调整该 D2D终端进行 PUSCH传输所使用的 PRB的起始位置和 DMRS 循环移位指示标识, 使得根据调整后的 PRB的起始位置和 DMRS循环移位指示标识确定 的网络侧设备向该 D2D终端进行 ACK/NACK反馈时所使用的 PHICH资源的位置、 与发 送该资源占用指示信息所使用的专用 PHICH资源的位置不重叠。
参见图 8a, 本申请实施例提供一种 D2D通信中的数据发送方法, 包括以下步骤: 步骤 80: D2D终端向网络侧设备发送对 D2D通信资源的资源占用请求, 以使网络侧 设备根据共享该 D2D通信资源的至少一个 D2D终端发送的资源占用请求, 确定该至少一 个 D2D终端中能够占用该 D2D通信资源发送数据的一个 D2D终端;
步骤 81 : 当 D2D终端接收到网络侧设备发送的指示信令时, D2D终端根据该指示信 令在该 D2D通信资源上发送数据。
进一步的, 当 D2D终端未接收到网络侧设备发送的指示信令时, D2D终端在该 D2D 通信资源上接收数据。
具体的, D2D终端发送的资源占用请求可以包括: 该 D2D终端在网络侧为自身配置 的用于 D2D链路的专属 SR资源上发送的 SR,该 SR用于表示该 D2D终端需要在 D2D链 路上传输数据; 或者, 该 D2D终端在网络侧为自身配置的用于 D2D链路的专属 SR资源 上发送的 SR, 该 SR用于表示该 D2D终端需要在 D2D链路上传输数据, 以及该 D2D终 端在网络侧调度的 PUSCH资源上发送的针对 D2D通信的緩存区状态 4艮告( BSR ),该 BSR 用于表示该 D2D终端当前在 D2D链路上需要传输的数据量; 或者, 该 D2D终端在网络侧 调度的 PUSCH资源上发送的针对 D2D通信的 BSR, 该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输的数据量。
这里, 网络侧为 D2D终端配置的用于 D2D链路的专属 SR资源, 是指网络侧为 D2D 终端配置的仅用于该 D2D终端通过 D2D链路发送 SR的资源。
网络侧需要对系统中的每个 D2D 终端均配置一个专属 SR资源。对于同一组内的 D2D 终端需要配置不同的专属 SR资源,从而可以区分不同的 D2D终端。对于不同组内的 D2D
终端, 其专属 SR资源的频域位置可以相同或不同, 但是时间位置需要不同。 专属 SR资源 可以占用 PUCCH formatl/la/lb的资源。
具体的, 步骤 81中当 D2D终端接收到网络侧设备发送的指示信令时, D2D终端根据 该指示信令在该 D2D通信资源上发送数据, 具体实现可以如下:
当 D2D终端接收到网络侧设备发送的指示信令时, 该 D2D终端在子帧 n-k上接收网 络侧设备发送的指示信令,根据指示信令在子帧 n上发送数据; 其中, 子帧 n为该 D2D通 信资源包括的子帧, k为不小于 1的整数, 且 k的取值满足以下条件: k个子帧的时间长 度大于预先设定的 D2D发送预处理的时间。 举例说明:
例 1 , 子帧 n与子帧 n-k遵守 LTE系统中定义的传输调度时序关系, 即子帧 n与子帧 n-k的时序关系, 与 LTE系统中发送 PUSCH数据的子帧 n与发送该 PUSCH数据的调度 信令的子帧 n-k的时序关系相同, 在 FDD系统中, k的取值固定为 4, 在 TDD系统中, k 的取值与 TDD上下行配置相关;
例 2, 子帧 n-k是与子帧 n相邻的 D2D子帧, 且子帧 n-k与子帧 n之间的时间间隔大 于所述 D2D发送预处理的时间。 也即, 在 D2D子帧 n之前的一个 D2D子帧 i中接收所述 指示信令, D2D子帧 n与 D2D子帧 i之间的间隔 k=n-i, k需要至少大于 D2D发送预处理 的时间, 如果相邻的两个 D2D子帧之间的间隔大于 D2D发送预处理的时间, 那么相当于 前一个 D2D子帧用于指示 D2D终端占用下一个 D2D子帧发送数据。
具体的, D2D发送预处理的时间可以包括: D2D 终端对所述指示信令的检测时间、 D2D终端收发信机转换的时间、数据包成帧的时间、物理层发送处理的时间中的至少一个。
具体的, 步骤 81中 D2D终端通过 PDCCH接收网络侧设备发送的 DCI, 根据该 DCI 在该 D2D通信资源上发送数据; 具体的, D2D终端在 PDCCH上检测使用该 D2D终端的 C-RNTI加扰的 DCI, 根据该 DCI在该 D2D通信资源上发送数据; 或者,
D2D终端通过专用于指示 D2D链路资源占用的物理信道资源接收网络侧设备发送的 指示信令, 根据该指示信令在该 D2D通信资源上发送数据。
在 D2D终端通过专用于指示 D2D链路资源占用的物理信道资源接收网络侧设备发送 的指示信令,根据该指示信令在所述 D2D通信资源上发送数据时,具体实现可以釆用如下 两种方式:
第一, D2D终端在预先为该 D2D终端配置的专用 PHICH资源上, 接收网络侧设备发 送的资源占用指示信息, 根据该资源占用指示信息在该 D2D通信资源上发送数据; 例如, 如果在 D2D子帧 n之前的子帧 n-k中, 该 D2D终端的专用 PHICH资源中承载的是 " 1" , 那么表示该 D2D终端的资源占用指示置位, 该 D2D终端可以在 D2D子帧 n中发送数据。
第二, D2D终端在预先为该 D2D终端配置的专用 D2D指示信道资源上, 接收网络侧 设备发送的资源占用指示信息, 根据该资源占用指示信息在该 D2D通信资源上发送数据。
这里,专用 D2D指示信道是新定义的物理信道, 即与现有技术中物理信道不同的物理 信道, 每个 D2D终端的专用 D2D指示信道资源可以通过码分或频分或时分的方式复用在 相同的时频资源中。例如:专用 D2D指示信道资源可以位于 PDSCH区域中的至少一个 PRB 上, 即将 LTE系统的下行 PDSCH区域中的至少一个 PRB对(pair )配置为 D2D指示信道 占用的资源, 专用 D2D指示信道可以釆用类似于 LTE系统中 PHICH的定义方式, 或者 PUCCH的定义方式。 如果在 D2D子帧 n之前的子帧 n-k中, D2D终端的专用 D2D指示 信道资源置位(即承载的信息是 "1" ),那么表示该 D2D终端的资源占用指示置位,该 D2D 终端可以在 D2D子帧 n中发送数据。
专用 D2D指示信道釆用类似于 LTE系统中 PUCCH的定义方式时的两个具体实例如 图 7a所示和如图 7b所示, 这里不再赘述。
如图 8b所示, 网络侧设备与 D2D终端交互的流程如下:
步骤一: 共享相同 D2D通信资源的至少一个 D2D终端 (例如 D2D终端 A和 D2D终 端 B ) 向基站发送对该 D2D通信资源的资源占用请求;
步骤二:基站接收到各 D2D终端发送的资源占用请求后,根据接收到的资源占用请求 确定至少一个 D2D终端中能够占用该 D2D通信资源(即 D2D子帧)发送数据的一个 D2D 终端, 并向能够占用该 D2D通信资源发送数据的 D2D终端发送指示信令, 以指示该 D2D 终端在该 D2D通信资源上发送数据, 比如, 指示 D2D终端 A或 D2D终端 B在 D2D子 帧上有数据发送权;
步骤三: 接收到基站发送的指示信令的 D2D终端根据该指示信令在 D2D通信资源上 (即 D2D子帧)发送数据。
参见图 9, 本申请实施例提供一种基站, 该基站包括:
接收单元 90, 用于接收至少一个 D2D终端发送的对 D2D通信资源的资源占用请求, 所述至少一个 D2D终端为共享所述 D2D通信资源的 D2D终端;
确定单元 91 , 用于才 居所述资源占用请求, 确定所述至少一个 D2D终端中能够占用 所述 D2D通信资源发送数据的一个 D2D终端;
发送单元 92, 用于向所述能够占用所述 D2D通信资源发送数据的 D2D终端发送指示 信令, 以指示该 D2D终端在所述 D2D通信资源上发送数据。
进一步的, 所述接收单元 90将接收到的每个 D2D终端发送的资源占用请求包括: 该 D2D终端在网络侧为自身配置的用于 D2D链路的专属调度请求 SR资源上发送的 SR, 该 SR用于表示该 D2D终端需要在 D2D链路上传输数据; 和 /或,
该 D2D终端在网络侧调度的物理上行共享信道 PUSCH资源上发送的针对 D2D通信 的緩存区状态报告 BSR,该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输的数据 量。
进一步的, 所述确定单元 91用于:
若接收到一个 D2D终端发送的资源占用请求, 则确定发送资源占用请求的 D2D终端 是能够占用所述 D2D通信资源发送数据的一个 D2D终端;
若接收到多个 D2D终端发送的资源占用请求,则根据终端轮询占用资源的原则,确定 该多个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端, 或者,根据接 收到的资源占用请求确定每个 D2D终端的业务需求, 据每个 D2D终端的业务需求确定 该多个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端。
进一步的, 所述发送单元 92用于:
在子帧 n-k上向所述能够占用所述 D2D通信资源发送数据的 D2D终端发送指示信令, 以指示该 D2D终端在子帧 n上发送数据; 其中, 子帧 n为所述 D2D通信资源包括的子帧, k为不小于 1的整数,且 k的取值满足以下条件: k个子帧的时间长度大于预先设定的 D2D 发送预处理的时间。
进一步的, 子帧 n与子帧 n-k遵守长期演进 LTE系统中定义的传输调度时序关系; 或 者,
子帧 n-k是与子帧 n相邻的 D2D子帧, 且子帧 n-k与子帧 n之间的时间间隔大于所述 D2D发送预处理的时间。
进一步的, 所述 D2D发送预处理的时间包括: D2D终端对所述指示信令的检测时间、 D2D终端收发信机转换的时间、数据包成帧的时间、物理层发送处理的时间中的至少一个。
进一步的, 所述发送单元 92包括第一单元或第二单元:
第一单元,用于通过物理下行控制信道 PDCCH向所述能够占用所述 D2D通信资源发 送数据的 D2D终端发送下行控制信息 DCI,以指示该 D2D终端在所述 D2D通信资源上发 送数据;
第二单元,用于通过专用于指示 D2D链路资源占用的物理信道资源, 向所述能够占用 所述 D2D通信资源发送数据的 D2D终端发送指示信令, 以指示该 D2D终端在所述 D2D 通信资源上发送数据。
进一步的, 所述第二单元用于:
在预先为所述能够占用所述 D2D通信资源发送数据的 D2D终端配置的专用物理混合 自动请求重传指示信道 PHICH资源上, 向该 D2D终端发送资源占用指示信息, 以指示该 D2D终端在所述 D2D通信资源上发送数据; 或者,
在预先为所述能够占用所述 D2D通信资源发送数据的 D2D终端配置的专用 D2D指示 信道资源上, 向该 D2D终端发送资源占用指示信息, 以指示该 D2D终端在所述 D2D通信 资源上发送数据。
进一步的, 每个 D2D终端的专用 D2D指示信道资源通过码分或频分或时分的方式复
用在相同的时频资源中。
进一步的, 所述专用 D2D指示信道资源位于 PDSCH 区域中的至少一个物理资源块 PRB上。
进一步的, 该基站还包括:
资源冲突处理单元 93 ,用于在预先为所述能够占用所述 D2D通信资源发送数据的 D2D 终端配置的专用 PHICH资源上, 向该 D2D终端发送资源占用指示信息, 以指示该 D2D终 端在所述 D2D通信资源上发送数据时,若确定发送物理上行共享信道 PUSCH传输对应的 肯定应答 /否定应答 ACK/NACK信息所使用的 PHICH资源的位置, 与发送所述资源占用 指示信息所使用的专用 PHICH资源的位置重叠, 则放弃在该专用 PHICH资源上发送所述 ACK/NACK信息, 并在发送用于调度下一次 PUSCH传输的 DCI时, 使用该 DCI中的新 数据指示 DI域指示是否正确接收 PUSCH数据。
参见图 10, 本申请实施例提供一种基站 100, 该基站包括处理器 101和存储器 102: 该处理器 101被配置为执行具备下列功能的计算机程序:接收至少一个 D2D终端发送 的对 D2D通信资源的资源占用请求,所述至少一个 D2D终端为共享所述 D2D通信资源的 D2D终端; 才 居所述资源占用请求, 确定所述至少一个 D2D终端中能够占用所述 D2D通 信资源发送数据的一个 D2D终端;向所述能够占用所述 D2D通信资源发送数据的 D2D终 端发送指示信令, 以指示该 D2D终端在所述 D2D通信资源上发送数据。
该存储器 102被配置为保存上述计算机程序的代码。
基于该基站实施例, 某些情况下, 处理器执行上述计算机程序实现的功能可以由处理 器和基带处理器执行的计算机程序配合实现。
参见图 11 , 本申请实施例提供一种终端, 该终端包括:
请求单元 111 , 用于向网络侧设备发送对 D2D通信资源的资源占用请求, 以使所述网 络侧设备根据共享所述 D2D通信资源的至少一个 D2D终端发送的资源占用请求, 确定所 述至少一个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端;
通信单元 112, 用于当接收到网络侧设备发送的指示信令时, 根据所述指示信令在所 述 D2D通信资源上发送数据。
进一步的, 所述通信单元 112还用于:
当未接收到网络侧设备发送的指示信令时, 在所述 D2D通信资源上接收数据。
进一步的, 所述资源占用请求包括:
该 D2D终端在网络侧为自身配置的用于 D2D链路的专属调度请求 SR资源上发送的
SR, 该 SR用于表示该 D2D终端需要在 D2D链路上传输数据; 和 /或,
该 D2D终端在网络侧调度的物理上行共享信道 PUSCH资源上发送的针对 D2D通信 的緩存区状态报告 BSR,该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输的数据
量。
进一步的, 所述通信单元 112用于: 当接收到网络侧设备发送的指示信令时, 在子帧 n-k上接收网络侧设备发送的指示信令; 根据所述指示信令在子帧 n上发送数据;
其中, 子帧 n为所述 D2D通信资源包括的子帧, k为不小于 1的整数, 且 k的取值满 足以下条件: k个子帧的时间长度大于预先设定的 D2D发送预处理的时间。
进一步的, 子帧 n与子帧 n-k遵守长期演进 LTE系统中定义的传输调度时序关系; 或 者,
子帧 n-k是与子帧 n相邻的 D2D子帧, 且子帧 n-k与子帧 n之间的时间间隔大于所述 D2D发送预处理的时间。
进一步的, 所述 D2D发送预处理的时间包括: D2D终端对所述指示信令的检测时间、 D2D终端收发信机转换的时间、数据包成帧的时间、物理层发送处理的时间中的至少一个。
进一步的,所述通信单元 112包括:第一接收单元,用于通过物理下行控制信道 PDCCH 接收网络侧设备发送的下行控制信息 DCI; 第一发送单元, 用于根据该 DCI在所述 D2D 通信资源上发送数据; 或者,
所述通信单元 112包括: 第二接收单元,用于通过专用于指示 D2D链路资源占用的物 理信道资源接收网络侧设备发送的指示信令; 第二发送单元, 用于根据该指示信令在所述 D2D通信资源上发送数据。
进一步的, 所述第二接收单元用于:在预先为该 D2D终端配置的专用物理混合自动请 求重传指示信道 PHICH 资源上, 接收网络侧设备发送的资源占用指示信息; 所述第二发 送单元用于: 根据该资源占用指示信息在所述 D2D通信资源上发送数据; 或者,
所述第二接收单元用于: 在预先为该 D2D终端配置的专用 D2D指示信道资源上, 接 收网络侧设备发送的资源占用指示信息; 所述第二发送单元用于: 才 居该资源占用指示信 息在所述 D2D通信资源上发送数据。
进一步的, 每个 D2D终端的专用 D2D指示信道资源通过码分或频分或时分的方式复 用在相同的时频资源中。
进一步的, 所述专用 D2D指示信道资源位于 PDSCH 区域中的至少一个物理资源块 PRB上。
参见图 12, 本申请实施例还提供一种终端 120, 该终端包括处理器 121和存储器 122: 该处理器 121被配置为: 向网络侧设备发送对 D2D通信资源的资源占用请求, 以使所 述网络侧设备才 居共享所述 D2D通信资源的至少一个 D2D终端发送的资源占用请求, 确 定所述至少一个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端; 当接 收到网络侧设备发送的指示信令时, 根据所述指示信令在所述 D2D通信资源上发送数据; 该存储器 122被配置为保存上述计算机程序的代码。
基于该终端实施例, 某些情况下, 处理器执行上述计算机程序实现的功能可以由处理 器和基带处理器执行的计算机程序配合实现。
综上, 本申请的有益效果包括:
本申请实施例提供的方案中, 网络侧设备接收至少一个 D2D终端发送的对相同 D2D 通信资源的资源占用请求后,根据接收到的资源占用请求确定该至少一个 D2D终端中能够 占用该 D2D通信资源发送数据的一个 D2D终端,并向确定的能够占用该 D2D通信资源发 送数据的 D2D终端发送指示信令, 该 D2D终端接收到该指示信令后根据该指示信令在该 D2D通信资源上发送数据。 本方案中, 各 D2D终端在需要占用 D2D通信资源发送数据时 向网络侧设备发送资源占用请求,网络侧设备则根据一定的策略确定能够占用 D2D通信资 源发送数据的 D2D终端, 并指示确定的 D2D终端在该 D2D通信资源上发送数据, 通过将 资源占用者的决定权交由网络侧设备行使 , 可以避免多个 D2D终端竟争同一 D2D通信资 源时所造成的资源占用冲突的问题, 进而降低了 D2D通信中资源占用冲突的概率。
本申请中给出了一种通过网络侧进行 D2D终端资源竟争解决的方法, 对 LTE协议影 响比较小, 同时在用户数比较多的时候可以极大的提高系统的资源利用率。
本申请是参照根据本申请实施例的方法、 设备(系统)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本申请的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选 实施例以及落入本申请范围的所有变更和修改。
显然, 本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和
范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内, 则本申请也意图包含这些改动和变型在内。
Claims
1、 一种设备到设备 D2D通信中的数据发送方法, 其特征在于, 该方法包括: 网络侧设备接收至少一个 D2D终端发送的对 D2D通信资源的资源占用请求, 所述至 少一个 D2D终端为共享所述 D2D通信资源的 D2D终端;
网络侧设备才 居所述资源占用请求,确定所述至少一个 D2D终端中能够占用所述 D2D 通信资源发送数据的一个 D2D终端;
网络侧设备向所述能够占用所述 D2D通信资源发送数据的 D2D终端发送指示信令, 以指示该 D2D终端在所述 D2D通信资源上发送数据。
2、如权利要求 1所述的方法,其特征在于, 每个 D2D终端发送的资源占用请求包括: 该 D2D终端在网络侧为自身配置的用于 D2D链路的专属调度请求 SR资源上发送的
SR, 该 SR用于表示该 D2D终端需要在 D2D链路上传输数据; 和 /或,
该 D2D终端在网络侧调度的物理上行共享信道 PUSCH资源上发送的针对 D2D通信 的緩存区状态报告 BSR,该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输的数据 量。
3、 如权利要求 1所述的方法, 其特征在于, 所述网络侧设备根据所述资源占用请求, 确定所述至少一个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端,具 体包括:
网络侧设备若接收到一个 D2D终端发送的资源占用请求,则确定发送资源占用请求的 D2D终端是能够占用所述 D2D通信资源发送数据的一个 D2D终端;
网络侧设备若接收到多个 D2D终端发送的资源占用请求,则根据终端轮询占用资源的 原则, 确定该多个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端, 或 者, 根据接收到的资源占用请求确定每个 D2D终端的业务需求, 根据每个 D2D终端的业 务需求确定该多个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端。
4、如权利要求 1所述的方法,其特征在于, 所述网络侧设备向所述能够占用所述 D2D 通信资源发送数据的 D2D终端发送指示信令,以指示该 D2D终端在所述 D2D通信资源上 发送数据, 具体包括:
网络侧设备在子帧 n-k上向所述能够占用所述 D2D通信资源发送数据的 D2D终端发 送指示信令, 以指示该 D2D终端在子帧 n上发送数据; 其中, 子帧 n为所述 D2D通信资 源包括的子帧, k为不小于 1的整数, 且 k的取值满足以下条件: k个子帧的时间长度大 于预先设定的 D2D发送预处理的时间。
5、 如权利要求 4所述的方法, 其特征在于, 子帧 n与子帧 n-k遵守长期演进 LTE系
统中定义的传输调度时序关系; 或者,
子帧 n-k是与子帧 n相邻的 D2D子帧。
6、 如权利要求 4所述的方法, 其特征在于, 所述 D2D发送预处理的时间包括: D2D 终端对所述指示信令的检测时间、 D2D终端收发信机转换的时间、 数据包成帧的时间、 物 理层发送处理的时间中的至少一个。
7、如权利要求 1所述的方法,其特征在于, 所述网络侧设备向所述能够占用所述 D2D 通信资源发送数据的 D2D终端发送指示信令,以指示该 D2D终端在所述 D2D通信资源上 发送数据, 具体包括:
网络侧设备通过物理下行控制信道 PDCCH向所述能够占用所述 D2D通信资源发送数 据的 D2D终端发送下行控制信息 DCI,以指示该 D2D终端在所述 D2D通信资源上发送数 据; 或者,
网络侧设备通过专用于指示 D2D链路资源占用的物理信道资源,向所述能够占用所述 D2D通信资源发送数据的 D2D终端发送指示信令, 以指示该 D2D终端在所述 D2D通信 资源上发送数据。
8、 如权利要求 7所述的方法, 其特征在于, 所述网络侧设备通过专用于指示 D2D链 路资源占用的物理信道资源, 向所述能够占用所述 D2D通信资源发送数据的 D2D终端发 送指示信令, 以指示该 D2D终端在所述 D2D通信资源上发送数据, 具体包括:
网络侧设备在预先为所述能够占用所述 D2D通信资源发送数据的 D2D终端配置的专 用物理混合自动请求重传指示信道 PHICH资源上,向该 D2D终端发送资源占用指示信息, 以指示该 D2D终端在所述 D2D通信资源上发送数据; 或者,
网络侧设备在预先为所述能够占用所述 D2D通信资源发送数据的 D2D终端配置的专 用 D2D指示信道资源上, 向该 D2D终端发送资源占用指示信息, 以指示该 D2D终端在所 述 D2D通信资源上发送数据。
9、如权利要求 8所述的方法,其特征在于, 每个 D2D终端的专用 D2D指示信道资源 通过码分或频分或时分的方式复用在相同的时频资源中。
10、如权利要求 8或 9所述的方法,其特征在于, 所述专用 D2D指示信道资源位于物 理下行共享信道 PDSCH区域中的至少一个物理资源块 PRB上。
11、如权利要求 8所述的方法, 其特征在于, 在网络侧设备在预先为所述能够占用所 述 D2D通信资源发送数据的 D2D终端配置的专用 PHICH资源上, 向该 D2D终端发送资 源占用指示信息, 以指示该 D2D终端在所述 D2D通信资源上发送数据时, 进一步包括: 网络侧设备若确定发送物理上行共享信道 PUSCH传输对应的肯定应答 /否定应答
ACK/NACK信息所使用的 PHICH资源的位置, 与发送所述资源占用指示信息所使用的专 用 PHICH资源的位置重叠, 则放弃在该专用 PHICH资源上发送所述 ACK/NACK信息,
并在发送用于调度下一次 PUSCH传输的 DCI时,使用该 DCI中的新数据指示 NDI域指示 是否正确接收 PUSCH数据。
12、 一种 D2D通信中的数据发送方法, 其特征在于, 该方法包括:
D2D终端向网络侧设备发送对 D2D通信资源的资源占用请求, 以使所述网络侧设备 才 据共享所述 D2D通信资源的至少一个 D2D终端发送的资源占用请求, 确定所述至少一 个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端;
当 D2D终端接收到网络侧设备发送的指示信令时, 所述 D2D终端根据该指示信令在 所述 D2D通信资源上发送数据。
13、 根据权利要求 12所述的方法, 其特征在于, 还包括:
当 D2D终端未接收到网络侧设备发送的指示信令时,所述 D2D终端在所述 D2D通信 资源上接收数据。
14、 如权利要求 12或 13所述的方法, 其特征在于, 所述资源占用请求包括:
D2D终端在网络侧为自身配置的用于 D2D链路的专属调度请求 SR资源上发送的 SR, 该 SR用于表示该 D2D终端需要在 D2D链路上传输数据; 和 /或,
D2D终端在网络侧调度的物理上行共享信道 PUSCH资源上发送的针对 D2D通信的緩 存区状态 4艮告 BSR, 该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输的数据量。
15、 如权利要求 12所述的方法, 其特征在于, 所述当 D2D终端接收到网络侧设备发 送的指示信令时, D2D终端根据该指示信令在所述 D2D通信资源上发送数据, 具体包括: 当 D2D终端接收到网络侧设备发送的指示信令时, 所述 D2D终端在子帧 n-k上接收 网络侧设备发送的指示信令,根据指示信令在子帧 n上发送数据;其中,子帧 n为所述 D2D 通信资源包括的子帧, k为不小于 1的整数, 且 k的取值满足以下条件: k个子帧的时间 长度大于预先设定的 D2D发送预处理的时间。
16、 如权利要求 15所述的方法, 其特征在于, 子帧 n与子帧 n-k遵守长期演进 LTE 系统中定义的传输调度时序关系; 或者,
子帧 n-k是与子帧 n相邻的 D2D子帧。
17、如权利要求 16所述的方法,其特征在于, 所述 D2D发送预处理的时间包括: D2D 终端对所述指示信令的检测时间、 D2D终端收发信机转换的时间、 数据包成帧的时间、 物 理层发送处理的时间中的至少一个。
18、 如权利要求 12所述的方法, 其特征在于, 还包括: 所述 D2D终端通过物理下行 控制信道 PDCCH接收网络侧设备发送的下行控制信息 DCI;
所述 D2D终端才 居该指示信令在所述 D2D通信资源上发送数据具体包括: 所述 D2D 终端根据该 DCI在所述 D2D通信资源上发送数据;
或者,
所述方法还包括: 所述 D2D终端通过专用于指示 D2D链路资源占用的物理信道资源 接收网络侧设备发送的指示信令;
所述 D2D终端才 居该指示信令在所述 D2D通信资源上发送数据具体包括: 所述 D2D 终端根据该指示信令在所述 D2D通信资源上发送数据。
19、如权利要求 18所述的方法,其特征在于, 所述 D2D终端通过专用于指示 D2D链 路资源占用的物理信道资源接收网络侧设备发送的指示信令具体包括:所述 D2D终端在预 先为该 D2D终端配置的专用物理混合自动请求重传指示信道 PHICH资源上, 接收网络侧 设备发送的资源占用指示信息;
所述 D2D终端根据该指示信令在所述 D2D通信资源上发送数据具体包括: 根据该资 源占用指示信息在所述 D2D通信资源上发送数据;
或者,
所述 D2D终端通过专用于指示 D2D链路资源占用的物理信道资源接收网络侧设备发 送的指示信令具体包括:所述 D2D终端在预先为该 D2D终端配置的专用 D2D指示信道资 源上, 接收网络侧设备发送的资源占用指示信息;
所述 D2D终端根据该指示信令在所述 D2D通信资源上发送数据具体包括: 根据该资 源占用指示信息在所述 D2D通信资源上发送数据。
20、如权利要求 19所述的方法,其特征在于, 每个 D2D终端的专用 D2D指示信道资 源通过码分或频分或时分的方式复用在相同的时频资源中。
21、如权利要求 19或 20所述的方法,其特征在于, 所述专用 D2D指示信道资源位于 PDSCH区域中的至少一个物理资源块 PRB上。
22、 一种基站, 其特征在于, 该基站包括:
接收单元, 用于接收至少一个 D2D终端发送的对 D2D通信资源的资源占用请求, 所 述至少一个 D2D终端为共享所述 D2D通信资源的 D2D终端;
确定单元,用于才 居所述资源占用请求,确定所述至少一个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端;
发送单元, 用于向所述能够占用所述 D2D通信资源发送数据的 D2D终端发送指示信 令, 以指示该 D2D终端在所述 D2D通信资源上发送数据。
23、 如权利要求 22所述的基站, 其特征在于, 所述接收单元将接收到的每个 D2D终 端发送的资源占用请求包括:
该 D2D终端在网络侧为自身配置的用于 D2D链路的专属调度请求 SR资源上发送的
SR, 该 SR用于表示该 D2D终端需要在 D2D链路上传输数据; 和 /或,
该 D2D终端在网络侧调度的物理上行共享信道 PUSCH资源上发送的针对 D2D通信 的緩存区状态报告 BSR,该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输的数据
量。
24、 如权利要求 22所述的基站, 其特征在于, 所述确定单元用于:
若接收到一个 D2D终端发送的资源占用请求, 则确定发送资源占用请求的 D2D终端 是能够占用所述 D2D通信资源发送数据的一个 D2D终端;
若接收到多个 D2D终端发送的资源占用请求,则根据终端轮询占用资源的原则,确定 该多个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端, 或者,根据接 收到的资源占用请求确定每个 D2D终端的业务需求, 据每个 D2D终端的业务需求确定 该多个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端。
25、 如权利要求 22所述的基站, 其特征在于, 所述发送单元用于:
在子帧 n-k上向所述能够占用所述 D2D通信资源发送数据的 D2D终端发送指示信令, 以指示该 D2D终端在子帧 n上发送数据; 其中, 子帧 n为所述 D2D通信资源包括的子帧, k为不小于 1的整数,且 k的取值满足以下条件: k个子帧的时间长度大于预先设定的 D2D 发送预处理的时间。
26、 如权利要求 24所述的基站, 其特征在于, 子帧 n与子帧 n-k遵守长期演进 LTE 系统中定义的传输调度时序关系; 或者,
子帧 n-k是与子帧 n相邻的 D2D子帧。
27、如权利要求 26所述的基站,其特征在于, 所述 D2D发送预处理的时间包括: D2D 终端对所述指示信令的检测时间、 D2D终端收发信机转换的时间、 数据包成帧的时间、 物 理层发送处理的时间中的至少一个。
28、 如权利要求 22 所述的基站, 其特征在于, 所述发送单元包括第一单元或第二单 元:
第一单元,用于通过物理下行控制信道 PDCCH向所述能够占用所述 D2D通信资源发 送数据的 D2D终端发送下行控制信息 DCI,以指示该 D2D终端在所述 D2D通信资源上发 送数据;
第二单元,用于通过专用于指示 D2D链路资源占用的物理信道资源, 向所述能够占用 所述 D2D通信资源发送数据的 D2D终端发送指示信令, 以指示该 D2D终端在所述 D2D 通信资源上发送数据。
29、 如权利要求 28所述的基站, 其特征在于, 所述第二单元用于:
在预先为所述能够占用所述 D2D通信资源发送数据的 D2D终端配置的专用物理混合 自动请求重传指示信道 PHICH资源上, 向该 D2D终端发送资源占用指示信息, 以指示该 D2D终端在所述 D2D通信资源上发送数据; 或者,
在预先为所述能够占用所述 D2D通信资源发送数据的 D2D终端配置的专用 D2D指示 信道资源上, 向该 D2D终端发送资源占用指示信息, 以指示该 D2D终端在所述 D2D通信
资源上发送数据。
30、如权利要求 29所述的基站,其特征在于, 每个 D2D终端的专用 D2D指示信道资 源通过码分或频分或时分的方式复用在相同的时频资源中。
31、如权利要求 29或 30所述的基站,其特征在于, 所述专用 D2D指示信道资源位于 PDSCH区域中的至少一个物理资源块 PRB上。
32、 如权利要求 29所述的基站, 其特征在于, 该基站还包括:
资源冲突处理单元, 用于在预先为所述能够占用所述 D2D通信资源发送数据的 D2D 终端配置的专用 PHICH资源上, 向该 D2D终端发送资源占用指示信息, 以指示该 D2D终 端在所述 D2D通信资源上发送数据时,若确定发送物理上行共享信道 PUSCH传输对应的 肯定应答 /否定应答 ACK/NACK信息所使用的 PHICH资源的位置, 与发送所述资源占用 指示信息所使用的专用 PHICH资源的位置重叠, 则放弃在该专用 PHICH资源上发送所述 ACK/NACK信息, 并在发送用于调度下一次 PUSCH传输的 DCI时, 使用该 DCI中的新 数据指示 DI域指示是否正确接收 PUSCH数据。
33、 一种终端, 其特征在于, 该终端包括:
请求单元,用于向网络侧设备发送对 D2D通信资源的资源占用请求, 以使所述网络侧 设备才 居共享所述 D2D通信资源的至少一个 D2D终端发送的资源占用请求, 确定所述至 少一个 D2D终端中能够占用所述 D2D通信资源发送数据的一个 D2D终端;
通信单元, 用于当接收到网络侧设备发送的指示信令时, 根据所述指示信令在所述 D2D通信资源上发送数据。
34、 如权利要求 33所述的终端, 其特征在于, 所述通信单元还用于:
当未接收到网络侧设备发送的指示信令时, 在所述 D2D通信资源上接收数据。
35、 如权利要求 33或 34所述的终端, 其特征在于, 所述资源占用请求包括: 该 D2D终端在网络侧为自身配置的用于 D2D链路的专属调度请求 SR资源上发送的 SR, 该 SR用于表示该 D2D终端需要在 D2D链路上传输数据; 和 /或,
该 D2D终端在网络侧调度的物理上行共享信道 PUSCH资源上发送的针对 D2D通信 的緩存区状态报告 BSR,该 BSR用于表示该 D2D终端当前在 D2D链路上需要传输的数据 量。
36、 如权利要求 33 所述的终端, 其特征在于, 所述通信单元用于: 当接收到网络侧 设备发送的指示信令时, 在子帧 n-k上接收网络侧设备发送的指示信令; 根据所述指示信 令在子帧 n上发送数据;
其中, 子帧 n为所述 D2D通信资源包括的子帧, k为不小于 1的整数, 且 k的取值满 足以下条件: k个子帧的时间长度大于预先设定的 D2D发送预处理的时间。
37、 如权利要求 36所述的终端, 其特征在于, 子帧 n与子帧 n-k遵守长期演进 LTE
系统中定义的传输调度时序关系; 或者,
子帧 n-k是与子帧 n相邻的 D2D子帧。
38、如权利要求 37所述的终端,其特征在于, 所述 D2D发送预处理的时间包括: D2D 终端对所述指示信令的检测时间、 D2D终端收发信机转换的时间、 数据包成帧的时间、 物 理层发送处理的时间中的至少一个。
39、 如权利要求 33 所述的终端, 其特征在于, 所述通信单元包括: 第一接收单元, 用于通过物理下行控制信道 PDCCH接收网络侧设备发送的下行控制信息 DCI; 第一发送 单元, 用于根据该 DCI在所述 D2D通信资源上发送数据; 或者,
所述通信单元包括: 第二接收单元,用于通过专用于指示 D2D链路资源占用的物理信 道资源接收网络侧设备发送的指示信令; 第二发送单元, 用于根据该指示信令在所述 D2D 通信资源上发送数据。
40、 如权利要求 39 所述的终端, 其特征在于, 所述第二接收单元用于: 在预先为该 D2D终端配置的专用物理混合自动请求重传指示信道 PHICH资源上, 接收网络侧设备发 送的资源占用指示信息; 所述第二发送单元用于:根据该资源占用指示信息在所述 D2D通 信资源上发送数据; 或者,
所述第二接收单元用于: 在预先为该 D2D终端配置的专用 D2D指示信道资源上, 接 收网络侧设备发送的资源占用指示信息; 所述第二发送单元用于: 才 居该资源占用指示信 息在所述 D2D通信资源上发送数据。
41、如权利要求 40所述的终端,其特征在于, 每个 D2D终端的专用 D2D指示信道资 源通过码分或频分或时分的方式复用在相同的时频资源中。
42、如权利要求 40或 41所述的终端, 其特征在于, 所述专用 D2D指示信道资源位于 PDSCH区域中的至少一个物理资源块 PRB上。
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