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WO2017133334A1 - Procédé et dispositif de détermination de ressource de communication - Google Patents

Procédé et dispositif de détermination de ressource de communication Download PDF

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Publication number
WO2017133334A1
WO2017133334A1 PCT/CN2016/110109 CN2016110109W WO2017133334A1 WO 2017133334 A1 WO2017133334 A1 WO 2017133334A1 CN 2016110109 W CN2016110109 W CN 2016110109W WO 2017133334 A1 WO2017133334 A1 WO 2017133334A1
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WIPO (PCT)
Prior art keywords
subframe
indication information
mapping
transmission
data packet
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Ceased
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PCT/CN2016/110109
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English (en)
Chinese (zh)
Inventor
左志松
卢有雄
杨瑾
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ZTE Corp
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ZTE Corp
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Publication date
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Publication of WO2017133334A1 publication Critical patent/WO2017133334A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for determining a communication resource.
  • the communication technology of Device to Device is a wireless communication method for data sharing and exchange between devices, such as distance, range and capacity.
  • the type of service that it undertakes does not require the service data source to pass through the core network under normal circumstances, and only needs to be completed between the user terminals.
  • Vehicle to X (V2X for short) refers to equipment in the vehicle to other equipment (another vehicle equipment, roadside equipment, pedestrian handheld equipment and the Internet according to the agreed communication protocol and data interaction standards). Between), wireless communication and information exchange. Communication through the Internet of Vehicles enables vehicles to achieve driving safety, improve traffic efficiency, and access convenience or entertainment information.
  • I-Telecom communication Vehicle to Vehicle (V2V), Vehicle to Infrastructure (V2I), and Vehicle-to-Pedestrian Communication ( Vehicle to Pedestrian, referred to as V2P).
  • the vehicle networking communication can realize the interconnection and intercommunication between the vehicle and the vehicle V2V, the vehicle and the human V2P, the vehicle and the infrastructure V2I, and effectively utilize the information extraction and sharing on the information network platform.
  • the vehicle network is based on wireless channel communication, realizing real-time information interaction between the vehicle and the vehicle, the vehicle and the roadside infrastructure, and notifying the respective position, speed, acceleration, and driving route. You can also know the road environment information, collaboratively sense the dangerous situation of the road, provide a variety of collision warning information in time, prevent the occurrence of road traffic safety accidents, and improve the safety of vehicles involved.
  • a device-to-device (D2D)-based communication method is a V2X standard implementation method.
  • D2D refers to the user equipment (User Equipment, UE for short) with service transmission.
  • the service data is not forwarded by the base station and the core network, and is directly transmitted by the source user equipment to the target user equipment through the air interface.
  • This method has the characteristics that are obviously different from the communication of the traditional cellular system.
  • the short-distance communication between the vehicle and the vehicle can apply the D2D communication mode, thereby saving the wireless spectrum resources and reducing the core network.
  • a communication method based on an LTE cellular communication network link is one of the other ways to implement the V2X standard, in which a base station or/and a relay participate in V2X communication, and transmit V2X signals on the uplink and/or downlink. .
  • a method and a device for determining a communication resource are provided to solve at least a problem that a data transmission delay caused by data transmission through a period of a data resource pool in D2D communication in the related art is large.
  • a method for determining a communication resource including: acquiring scheduling allocation SA indication information for device-to-device D2D communication; and mapping rules between the SA indication information and a to-be-transmitted data packet Determining a communication resource for transmitting the data packet to be transmitted.
  • determining, by using the frequency domain location, the communication resource for transmitting the to-be-transmitted data packet includes: configuring the SA indication information and the to-be-transmitted data packet in the D2D communication The bandwidth is divided by different frequency domain resource locations.
  • the communication resource when the communication resource includes a transmission subframe, determining, by using the first transmission and/or the last transmission, the subframe that carries the SA indication information, and the communication resource that is used to transmit the to-be-transmitted data packet
  • the fixed subframe offset determines the transmission subframe; or the transmission subframe is determined by a location where the subframe offset indicated by the SA indication information is located, where the subframe offset is located And a position at which a predetermined number of subframes are located from a position where the subframe carrying the SA indication information is located.
  • the determining, by the first transmission and/or the last transmission, the subframe carrying the SA indication information and the fixed subframe offset, determining the transmission subframe includes: acquiring the first transmission and/or the last transmission
  • the position of the subframe in which the SA indication information is located is offset from the fixed subframe, where the value of the fixed subframe offset includes: a transmission period of the SA indication information, or an arbitrary a positive integer; the subframe is mapped to the start point of the subframe, and the subframe set indicated by the SA indication information is mapped; and the subframe in the subframe set is used as the transmission subframe.
  • the determining, by the location where the subframe offset indicated by the SA indication information is located, the transmitting subframe includes: a location according to a subframe carrying the SA indication information, and the SA Determining a position of the subframe offset indicated by the information to obtain a subframe mapping start point; mapping, according to the subframe mapping start point, a subframe set indicated by the SA indication information; and using a subframe in the subframe set Or the SA indicator information is divided into a plurality of SA resource subgroups in the time domain; the location according to the boundary of the SA resource subgroup and the indication indicated by the SA indication information Position of the subframe offset is obtained as a starting point of the subframe mapping; according to the starting point of the subframe mapping, mapping a subframe set indicated by the SA indication information; using a subframe in the subframe set as the transmission subframe frame.
  • the mapping the subframe set indicated by the SA indication information includes: after obtaining the subframe mapping start point, according to the number of data packets that are indicated by the SA indication information, the data packet The number of retransmissions and the transmission interval of the data packet determine a transmission subframe other than the initial transmission subframe indicated by the start of the subframe mapping to obtain the subframe set.
  • the number of data packets that are indicated by the SA indication information and the number of retransmissions of the data packet are determined by setting a predetermined number of data packets and a number of retransmissions of each data packet in advance; or Receiving, by the network side entity, the number of the data packets configured by the high layer signaling and/or the physical layer signaling, and the number of retransmissions of the data packet; or, according to the load carried on the D2D communication bandwidth, The number of the data packets and the number of retransmissions of the data packets are selected.
  • the method further includes: mapping, according to a predetermined rule, a first transmission and a retransmission of each data packet to a subframe included in the subframe set, respectively.
  • the predetermined rule is to first map a first packet and retransmit the first packet and retransmit the first packet and retransmit the next packet.
  • the network side entity includes any one of the following: an evolved base station eNB, a relay station RN, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN, operation management, and Maintain the OAM Manager.
  • a communication resource determining apparatus comprising: an obtaining module configured to acquire scheduling allocation SA indication information for device-to-device D2D communication; and a determining module configured to be in accordance with the SA indication A mapping rule between the information and the data packet to be transmitted determines a communication resource for transmitting the data packet to be transmitted.
  • the determining module includes: a processing unit, configured to: when the communication resource includes a frequency domain location, configure the SA indication information and the to-be-transmitted data packet to be allocated by the communication bandwidth of the D2D Different frequency domain resource locations.
  • the determining module includes: a first determining unit, configured to: when the communication resource includes a transmission subframe, the subframe and the fixed carrier that carry the SA indication information by using the first transmission and/or the last transmission Determining, by the frame offset, the transmission subframe; or, the second determining unit, is configured to determine the transmission subframe by a position where the subframe offset indicated by the SA indication information is located, where the subframe is biased
  • the position where the shift is located is a position at which a predetermined number of sub-frames are located from the position where the sub-frame carrying the SA indication information is located.
  • the first determining unit includes: a first acquiring subunit, configured to acquire the fixed subframe offset from the first transmission and/or the last transmitted subframe carrying the SA indication information a location in which the fixed subframe offset includes: a transmission period of the SA indication information, or any positive integer; a first mapping subunit, configured to map the location as a subframe a starting point, mapping a subframe set indicated by the SA indication information; and a first setting subunit configured to use a subframe in the subframe set as the transmission subframe.
  • the second determining unit includes: a second acquiring subunit, configured to be located according to a location where the subframe carrying the SA indication information is located and a subframe offset indicated by the SA indication information a location of the subframe mapping start point; a second mapping subunit, configured to map a subframe set indicated by the SA indication information according to the subframe mapping start point; and a second setting subunit configured to set the subframe a sub-frame in the set is used as the transmission sub-frame; or, a sub-unit is configured to divide the SA indication information into a plurality of SA resource sub-groups in a time domain; and a third acquisition sub-unit, configured to a location where a boundary of the SA resource subgroup is located and a location where the subframe offset indicated by the SA indication information is located to obtain a subframe mapping start point; and a third mapping subunit, configured to map according to the subframe mapping starting point
  • the SA indicates a subframe set indicated by the information; and the third setting subunit is configured to use a subframe in the
  • the first mapping subunit or the second mapping subunit or the third mapping subunit is further configured to: after the obtaining the subframe mapping starting point, according to the data indicated by the SA indication information
  • the number of packets, the number of retransmissions of the data packet, and the transmission interval of the data packet determine a transmission subframe other than the initial transmission subframe indicated by the start of the subframe mapping to obtain the sub-frame Frame collection.
  • the first mapping subunit or the second mapping subunit or the third mapping subunit is further configured to determine, by using the following manner, the number of data packets that are indicated by the SA indication information, and the data.
  • the number of retransmissions of the packet a predetermined number of data packets and a number of retransmissions of each data packet are set in advance; or the number of the data packets configured by the network side entity through high layer signaling and/or physical layer signaling is received. And the number of retransmissions of the data packet; or, according to the load carried on the D2D communication bandwidth, the number of the data packets and the number of retransmissions of the data packet are selected.
  • the first determining unit or the second determining unit is further configured to: after mapping the subframe set indicated by the SA indication information, respectively map the first transmission and the retransmission of each data packet according to a predetermined rule. Up to a subframe included in the subframe set; wherein the predetermined rule is to first map a first packet and retransmit a packet to re-map the first packet and retransmit the next packet.
  • the network side entity includes any one of the following: an evolved base station eNB, a relay station RN, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN, operation management, and Maintain the OAM Manager.
  • Another embodiment of the present invention provides a computer storage medium, where the computer storage medium stores execution instructions for performing one or a combination of the steps in the foregoing method embodiments.
  • the SA allocation information for scheduling the device-to-device D2D communication is obtained; and the communication resource for transmitting the data packet to be transmitted is determined according to the mapping rule between the SA indication information and the data packet to be transmitted. . That is, in the embodiment of the present invention, the period of the data resource pool is removed, and the communication resource for transmitting the to-be-transmitted data packet is determined according to the mapping rule between the SA indication information and the data packet to be transmitted, thereby avoiding In the D2D communication, the data transmission delay caused by data transmission through the cycle of the data resource pool is large, and the effect of shortening the data transmission delay is achieved.
  • FIG. 1 is a flowchart of determining a communication resource according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of D2D SA resources and data resources according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a frame of an LTE system according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an SA mapping a PSSCH subframe by indicating a TRP bitmap in a D2D communication system according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram (1) of mapping a subframe by a TRP bitmap sequence and mapping a subframe by a fixed retransmission interval according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram (2) of mapping a subframe by a TRP bitmap sequence and mapping a subframe by a fixed retransmission interval according to an embodiment of the present invention
  • FIG. 7 is a structural block diagram of a determining apparatus of a communication resource according to an embodiment of the present invention.
  • FIG. 8 is a structural block diagram (1) of a device for determining communication resources according to an embodiment of the present invention.
  • FIG. 9 is a structural block diagram (2) of a device for determining communication resources according to an embodiment of the present invention.
  • FIG. 10 is a structural block diagram (3) of a device for determining communication resources according to an embodiment of the present invention.
  • FIG. 11 is a structural block diagram (4) of a device for determining communication resources according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of determining a communication resource according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 acquiring scheduling allocation SA indication information for device-to-device D2D communication
  • Step S104 Determine, according to a mapping rule between the SA indication information and the data packet to be transmitted, a communication resource used for transmitting the to-be-transmitted data packet.
  • the application scenario of the foregoing method for determining a communication resource includes, but is not limited to, a vehicle-to-network communication (Vehicle to X, abbreviated as V2X), and a device-to-device (abbreviated as D2D) communication.
  • V2X vehicle to X
  • D2D device-to-device
  • the SA allocation information is used to obtain the scheduling information for device-to-device D2D communication; and the communication resource for transmitting the data packet to be transmitted is determined according to the mapping rule between the SA indication information and the data packet to be transmitted.
  • the period of the data resource pool is removed, and the communication resource for transmitting the to-be-transmitted data packet is determined according to the mapping rule between the SA indication information and the data packet to be transmitted, thereby avoiding the D2D.
  • the data transmission delay caused by the data transmission in the period of the data resource pool is large, and the effect of shortening the data transmission delay is achieved.
  • the foregoing communication resource includes, but is not limited to, any one of the following: a transmission subframe for transmitting a data packet to be transmitted, a frequency domain location for transmitting a data packet to be transmitted, and a transmission subrender for retransmission
  • a transmission subframe for transmitting a data packet to be transmitted a frequency domain location for transmitting a data packet to be transmitted
  • a transmission subrender for retransmission The frame and the manner in which the data packet to be transmitted are transmitted on the indicated subframe are not limited herein.
  • determining the communication resource used for transmitting the data packet to be transmitted includes the following steps:
  • Step S11 configuring the SA indication information and the to-be-transmitted data packet in different frequency domain resources divided by the D2D communication bandwidth. Location.
  • the SA indication information and the data packet to be transmitted are configured in the frequency domain resource location divided by the D2D communication bandwidth, but are not limited to: the SA indication information and the to-be-transmitted data packet occupy the same resource block. , or the SA indication information and the data packet to be transmitted occupy different resource blocks.
  • the SA indication information and the data to be transmitted are located at different subframe positions in the time domain; in the frequency domain, the SA indication information and the data to be transmitted occupy different resource blocks.
  • the communication resource includes the transmission subframe
  • determining, by the communication resource for transmitting the to-be-transmitted data packet the following steps:
  • Step S21 determining, by using the first transmission and/or the last transmitted subframe carrying the SA indication information and the fixed subframe offset, the transmission subframe; or
  • Step S22 The transmission subframe is determined by a position where the subframe offset indicated by the SA indication information is located, where the subframe offset is located at a distance from the subframe carrying the SA indication information. The position at which the predetermined number of sub-frames are located.
  • the transmission subframe is determined by the first transmission and/or the last transmitted subframe carrying the SA indication information and the fixed subframe offset, or the subframe offset indicated by the SA indication information
  • the location is determined by the transmission subframe, and the transmission subframe of the data packet to be transmitted is quickly determined, thereby increasing the data packet transmission rate.
  • determining the transmission subframe by using the first transmission and/or the last transmitted subframe carrying the SA indication information and the fixed subframe offset includes the following steps:
  • Step S31 Acquire a position after the offset of the fixed subframe from the subframe that carries the SA indication information that is transmitted for the first time and/or the last transmission, where the value of the fixed subframe offset includes: the SA Indicates the transmission period of the information, or any positive integer;
  • Step S32 using the location as a starting point of the subframe mapping, and mapping the subframe set indicated by the SA indication information;
  • Step S33 the subframe in the subframe set is used as the transmission subframe.
  • the value of the fixed subframe offset includes, but is not limited to, 0, 1, and the transmission period of the SA indication information, and is not limited herein.
  • a subframe mapping start point is first determined, and a subframe set indicated by the SA indication information is mapped according to the subframe mapping start point, and a subframe in the subframe set is used as the transmission subframe, thereby A flexible indication of the effect of the data channel subframe is achieved.
  • determining, by the location where the subframe offset indicated by the SA indication information is located, the transmitting subframe includes the following steps:
  • Step S41 Obtain a subframe mapping start point according to a location where the subframe where the SA indication information is carried and a location where the subframe offset indicated by the SA indication information is located; and map the SA indication according to the subframe mapping starting point. a set of subframes indicated by the information; the subframe in the set of subframes is used as the transmission subframe; or
  • Step S42 The SA indication information is divided into multiple SA resource subgroups in the time domain; the location of the boundary of the SA resource subgroup and the location of the subframe offset indicated by the SA indication information are obtained. a subframe mapping start point; according to the subframe mapping start point, mapping the subframe set indicated by the SA indication information; using the subframe in the subframe set as the transmission subframe.
  • the transmission subframe is determined by the subframe offset indicated by the SA indication information, and the data transmission delay caused by data transmission through the period of the data resource pool in the D2D communication in the related art is further solved. Larger problems have achieved the effect of shortening the data transmission delay.
  • mapping the subframe set indicated by the SA indication information includes the following steps:
  • Step S51 after obtaining the starting point of the subframe mapping, determining the starting point of the subframe mapping according to the number of data packets indicated by the SA indication information, the number of retransmissions of the data packet, and the transmission interval of the data packet.
  • a transmission subframe other than the indicated initial transmission subframe is obtained to obtain the subframe set.
  • the first subframe set is obtained by first mapping the initial transmission subframe and then mapping the transmission subframe after the initial subframe, thereby improving the accuracy of determining the transmission subframe.
  • the number of data packets indicated by the SA indication information and the number of retransmissions of the data packet are determined by:
  • Step S61 presetting a predetermined number of data packets and the number of retransmissions of each data packet.
  • Step S62 receiving the number of the data packets configured by the network side entity by using the high layer signaling and/or the physical layer signaling, and the number of retransmissions of the data packet;
  • Step S63 Select the number of the data packets and the number of retransmissions of the data packet according to the load carried on the D2D communication bandwidth.
  • the number of data packets indicated by the SA indication information and the number of retransmissions of the data packet are determined, which further improves the determining efficiency of the transmission subframe.
  • mapping the subframe set indicated by the SA indication information after mapping the subframe set indicated by the SA indication information, the following steps are further included:
  • Step S71 mapping the first transmission and the retransmission of each data packet to the subframe included in the subframe set according to a predetermined rule; wherein the predetermined rule is to first map the first transmission and the retransmission of a data packet. Maps the first pass and retransmission of the next packet.
  • the data packets to be transmitted by using the foregoing predetermined rules are sequentially mapped into the subframe set, so that each data packet can be transmitted on the corresponding transmission subframe, thereby further improving channel resource utilization. Rate and data transfer rate.
  • the network side entity includes any one of the following: an evolved base station eNB, a relay station RN, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN, Operation management and maintenance of the OAM Manager.
  • the radio resources of the UE are uniformly controlled by the evolved NodeB (eNB), and the eNB indicates the downlink or uplink resources configured by the UE, and the UE receives the eNB on the corresponding downlink resource according to the configuration indication of the eNB.
  • the transmitted data signal, or the signal is transmitted to the eNB on the uplink resource.
  • radio resources divide resources in units of radio frames in the time domain, each radio frame is 10 ms, and includes 10 subframes. Each sub-frame is 1 ms, divided into two slot slots of 0.5 ms. As shown in FIG.
  • resources are divided in units of subcarriers, and each subcarrier includes 15 kHz or 7.5 kHz resources.
  • the eNB allocates a time-frequency resource to the UE as a resource block (Resource Block, RB for short), and the RB is defined as one slot in the time domain and continuous in the frequency domain.
  • Resource Block Resource Block
  • the eNB can flexibly dynamically schedule resources required for configuration according to UE requirements.
  • LTE extends the corresponding wireless parameters.
  • LTE uses a Physical Sidelink Shared Channel (PSSCH) for D2D communication.
  • PSSCH Physical Sidelink Shared Channel
  • the D2D transmitting end UE having the D2D data to be transmitted may obtain the PSSCH subframe configuration from the eNB, or select a certain subframe as a PSSCH subframe in the system predefined resource pool, and the eNB configures the PSSCH subframe to the transmitting UE, or
  • the transmitting UE indicates the used PSSCH subframe to the receiving UE, and uses a Time Resource Pattern (TRP) to indicate one or more PSSCH subframes used.
  • TRP Time Resource Pattern
  • a frequency band of a network may be shared, or a dedicated frequency band may be used for communication.
  • the SCI control information gives the location information of the resource.
  • the TRP is used to determine a transmission subframe of the data.
  • the TRP information may be indicated by the DCI 5, that is, the D2D resource scheduling indication dedicated control information format sent by the network, and the TRP is indicated in the Send Link Control Information (SID).
  • SID Send Link Control Information
  • TRP information can also be sent by the SA.
  • the form of the subframe is represented by a bitmap in FIG.
  • the bitmap sequence indicated by the TRP index the corresponding subframe whose bit is identified as "1" is indicated as a PSSCH subframe.
  • the bitmap sequence indicated by the TRP performs a one-to-one correspondence indication on logically consecutive subframes included in the resource pool.
  • the mapping of the TRP bitmap sequence to the subframe also applies to the direct mapping indication to the actual physical subframe, and based on the logic sub- A mapping indication of a set of frames.
  • a subframe mapping manner without a TRP bitmap can also be adopted, and the transmitted subframe is determined in other manners. Reception can be terminated by the next scheduling command, or the number of repetitions can be configured.
  • the data channel subframes are determined for the TRP and the non-TRP indication respectively, and the specific methods include:
  • the data packet and the retransmission subframe are mapped by using a bitmap corresponding to the TRP.
  • the subframe corresponding to the bitmap indicated in the SA is started to be mapped with respect to the fixed subframe offset position of the first or last transmitted SA subframe.
  • the fixed subframe offset may have a value of 1, an SA transmission period, or other integer value.
  • the first or last transmitted SA subframe determines the transmission subframe of the data channel. Or determining, by the offset of the scheduling indication of the SA, the transmission subframe in which the bitmap starts to map.
  • the number of packets required and the number of packet transmissions are determined by the following methods.
  • the number of data packets transmitted is Pt, and the number of times each data packet is transmitted is Rt.
  • a packet is transmitted once using one subframe:
  • the device autonomously dynamically selects the number of transmission data packets scheduled by one SA, and/or the number of retransmissions of the data packet;
  • the mapped M times of the Bitmap may be connected or a certain subframe interval. .
  • the device maps to the selected subframe set according to the determined number of transmission data packets and the number of retransmission times of the data packet.
  • the device sequentially maps the first transmission and the retransmission of each data packet on the belonging subframe set.
  • the order of mapping is based on the specified number of first transmissions and retransmissions of a data packet, and then the first transmission and retransmission of another data packet are sequentially performed. When all data packets are mapped, the remaining subframes of the belonging subframe set are no longer mapped.
  • the transmission subframe is determined by the number of data packet transmissions, the number of retransmissions, and the transmission interval.
  • the bitmap of the data channel is mapped to the subframe by using the bitmap sequence corresponding to the TRP index, the starting position, interval and number of times of the mapped subframe need to be determined.
  • the subframe corresponding to the bitmap indicated in the SA is started to be mapped with respect to the fixed subframe offset position of the first or last transmitted SA subframe.
  • the fixed subframe offset may have a value of 1, an SA transmission period, or other integer value.
  • the first or last transmitted SA subframe determines the transmission subframe of the data channel. Or, by using the offset of the scheduling indication of the SA, the transmission subframe in which the bitmap starts to be mapped is determined, which is hereinafter referred to as the start frame.
  • the number of packets required and the number of packet transmissions are determined by the following methods.
  • the number of data packets transmitted is Pt, and the number of times each data packet is transmitted is Rt.
  • a packet is transmitted once using one subframe:
  • the device autonomously dynamically selects the number of transmission data packets scheduled by one SA, and/or the number of retransmissions of the data packet;
  • the M times Bitmap mapped by the bitmap indicated in the SA from the start frame may be connected or may be a certain subframe interval. .
  • the device maps to the selected subframe set according to the determined number of transmission data packets and the number of retransmission times of the data packet.
  • the device sequentially maps the first transmission and the retransmission of each data packet on the belonging subframe set.
  • the order of mapping is based on the specified number of first and retransmissions of a packet, and then the first and second retransmissions of another packet.
  • the number of mappings from the start frame is Pt*Rt times.
  • the interval between the first transmission and the retransmission of each data packet is X.
  • the interval between packets is Y. Both X and Y are positive integers set by the system.
  • mapping start position can be used in any combination without conflict, which is further explained by an alternative embodiment.
  • the number of data packets transmitted is Pt
  • the number of times each data packet is transmitted is Rt times.
  • the mapping interval of Bitmap is 0.
  • the mapping start subframe of the predefined TRP is the SA scheduling offset of 4 subframes, and the corresponding TRP bitmap sequence mapping indicates the effect of the data channel subframe as shown in FIG. 5.
  • the corresponding bitmap sequence can be determined to be "10101000”.
  • the bitmap sequence has a k value of 3. So the Bitmap needs to be mapped 2 times.
  • the Bitmap sequence is mapped from the first subframe, and is mapped twice, correspondingly indicating that 6 subframes are data channel subframes. It can be seen that through the predefined rule setting, the effective mapping of the TRP indication can be realized without any signaling indication.
  • the number of data packets transmitted is Pt
  • the number of times each data packet is transmitted is Rt times.
  • the retransmission interval between packets is 1.
  • the mapping start subframe of the predefined TRP is the SA scheduling offset of 15 subframes, and the mapping indicates that the effect of the data channel subframe is as shown in the lower half of FIG. 5.
  • the device maps from the first subframe, and mapping 3 times indicates that the three subframes are data channel subframes.
  • the use of data sub-frames can be achieved by simple retransmission rules.
  • the SA and Data are frequency-divided, and the SA resource pool is divided into sub-groups.
  • the SA uses a pattern similar to D2D to solve the half-duplex problem and also limits the maximum retransmission interval of the SA. Reduced latency.
  • the Data indicated by the SA is transmitted on some subframes of the Data resource pool.
  • the subframe in which Data is transmitted may be indicated by a method similar to T-RPT, or a method of fixed offset + interval. (for example, optional embodiment 1 and optional embodiment 2)
  • the maximum number of data packets transmitted by one SA scheduling is Pt, and the maximum number of data transmissions per packet is Rt times.
  • Pt the number of retransmissions of the data packet
  • the retransmission interval between packets is 0.
  • the predefined mapping start subframe is the SA first transmission scheduling offset of 10 subframes, and the mapping indicates that the data channel subframe is mapped from the 10th subframe after the first transmission SA inferred from the detection.
  • the device senses whether all packets and all retransmissions have been transmitted based on the detected network congestion conditions. When congestion is detected, the number of retransmissions and packets are reduced according to specific rules.
  • the technical solution in the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium (such as ROM/RAM,
  • a storage medium such as ROM/RAM,
  • the disk, the optical disk includes a plurality of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method described in various embodiments of the present invention.
  • a device for determining a communication resource is provided.
  • the device is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 7 is a structural block diagram of a device for determining communication resources according to an embodiment of the present invention. As shown in FIG. 7, the device includes:
  • an obtaining module 72 configured to acquire scheduling allocation SA indication information used for device-to-device D2D communication
  • the determining module 74 is configured to determine, according to a mapping rule between the SA indication information and the data packet to be transmitted, a communication resource for transmitting the data packet to be transmitted.
  • the application scenario of the foregoing method for determining a communication resource includes, but is not limited to, a vehicle-to-network communication (Vehicle to X, abbreviated as V2X), and a device-to-device (abbreviated as D2D) communication.
  • V2X vehicle to X
  • D2D device-to-device
  • the SA allocation information is used to obtain the scheduling information for device-to-device D2D communication; and the communication resource for transmitting the data packet to be transmitted is determined according to the mapping rule between the SA indication information and the data packet to be transmitted.
  • the period of the data resource pool is removed, and the communication resource for transmitting the to-be-transmitted data packet is determined according to the mapping rule between the SA indication information and the data packet to be transmitted, thereby avoiding the D2D.
  • Data resource pool The cycle of data transmission causes a large delay in data transmission delay, thereby achieving the effect of shortening the data transmission delay.
  • the foregoing communication resource includes, but is not limited to, any one of the following: a transmission subframe for transmitting a data packet to be transmitted, a frequency domain location for transmitting a data packet to be transmitted, and a transmission subrender for retransmission
  • a transmission subframe for transmitting a data packet to be transmitted a frequency domain location for transmitting a data packet to be transmitted
  • a transmission subrender for retransmission The frame and the manner in which the data packet to be transmitted are transmitted on the indicated subframe are not limited herein.
  • FIG. 8 is a structural block diagram (1) of a determining apparatus for a communication resource according to an embodiment of the present invention.
  • the determining module 74 includes:
  • the processing unit 82 is configured to, when the communication resource includes a frequency domain location, configure the SA indication information and the to-be-transmitted data packet on different frequency domain resource locations divided by the D2D communication bandwidth.
  • the SA indication information and the data packet to be transmitted are configured in the frequency domain resource location divided by the D2D communication bandwidth, but are not limited to: the SA indication information and the to-be-transmitted data packet occupy the same resource block. , or the SA indication information and the data packet to be transmitted occupy different resource blocks.
  • the SA indication information and the data to be transmitted are located at different subframe positions in the time domain; in the frequency domain, the SA indication information and the data to be transmitted occupy different resource blocks.
  • FIG. 9 is a structural block diagram (2) of a determining apparatus for a communication resource according to an embodiment of the present invention.
  • the determining module 74 includes:
  • the first determining unit 92 is configured to: when the communication resource includes a transmission subframe, determine the transmission subframe by using a first subframe and/or a last transmitted subframe carrying the SA indication information and a fixed subframe offset; or,
  • the second determining unit 94 is configured to determine the transmission subframe by using a location where the subframe offset indicated by the SA indication information is located, where the subframe offset is located at a distance from which the SA is carried The position at which the sub-frame indicating the information is located is a predetermined number of sub-frames.
  • the transmission subframe is determined by the first transmission and/or the last transmitted subframe carrying the SA indication information and the fixed subframe offset, or the subframe offset indicated by the SA indication information
  • the location is determined by the transmission subframe, and the transmission subframe of the data packet to be transmitted is quickly determined, thereby increasing the data packet transmission rate.
  • FIG. 10 is a structural block diagram (3) of a determining apparatus of a communication resource according to an embodiment of the present invention.
  • the first determining unit 92 includes:
  • the first obtaining sub-unit 102 is configured to acquire a position after the subframe corresponding to the first transmission and/or the last transmission carrying the SA indication information is offset from the fixed subframe, where the fixed subframe
  • the value of the offset includes: the SA indicates the transmission period of the information, or any positive integer;
  • the first mapping sub-unit 104 is configured to map the subframe set indicated by the SA indication information by using the location as a subframe mapping starting point;
  • the first setting subunit 106 is configured to use the subframe in the subframe set as the transmission subframe.
  • the value of the fixed subframe offset includes, but is not limited to, 0, 1, and the transmission period of the SA indication information, and is not limited herein.
  • a subframe mapping start point is first determined, and a subframe set indicated by the SA indication information is mapped according to the subframe mapping start point, and a subframe in the subframe set is used as the transmission subframe, thereby A flexible indication of the effect of the data channel subframe is achieved.
  • FIG. 11 is a structural block diagram (4) of a determining apparatus for a communication resource according to an embodiment of the present invention.
  • the second determining unit 94 includes:
  • the second obtaining sub-unit 112 is configured to obtain a subframe mapping starting point according to a location where the subframe in which the SA indication information is carried and a position where the subframe offset indicated by the SA indication information is located; 2) The second mapping sub-unit 114 is configured to map the subframe set indicated by the SA indication information according to the subframe mapping start point; 3) the second setting sub-unit 116 is configured to use the subframe in the subframe set as the transmission. Subframe; or,
  • the dividing sub-unit 118 is configured to divide the SA indication information into a plurality of SA resource sub-groups in the time domain; 5) the third obtaining sub-unit 120 is set to be located according to the boundary of the SA resource sub-group And the position where the subframe offset indicated by the SA indication information is located to obtain a subframe mapping start point; 6) the third mapping sub-unit 122 is configured to map the subframe indicated by the SA indication information according to the subframe mapping starting point The third setting sub-unit 124 is configured to use the subframe in the subframe set as the transmission subframe.
  • the transmission subframe is determined by the subframe offset indicated by the SA indication information, and the data transmission delay caused by data transmission through the period of the data resource pool in the D2D communication in the related art is further solved. Larger problems have achieved the effect of shortening the data transmission delay.
  • the first mapping sub-unit 104 or the second mapping sub-unit 114 or the third mapping sub-unit 122 is further configured to transmit according to the indication information of the SA after obtaining the starting point of the subframe mapping.
  • the number of data packets, the number of retransmissions of the data packet, and the transmission interval of the data packet determine a transmission subframe other than the initial transmission subframe indicated by the start of the subframe mapping to obtain the subframe collection. .
  • the first subframe set is obtained by first mapping the initial transmission subframe and then mapping the transmission subframe after the initial subframe, thereby improving the accuracy of determining the transmission subframe.
  • the first mapping sub-unit 104 or the second mapping sub-unit 114 or the third mapping sub-unit 122 is further configured to determine, according to the manner, the number of data packets that are indicated by the SA indication information, The number of retransmissions of this packet:
  • the number of the data packets and the number of retransmissions of the data packet are selected.
  • the number of data packets indicated by the SA indication information and the number of retransmissions of the data packet are determined, which further improves the determining efficiency of the transmission subframe.
  • the first determining unit 92 or the second determining unit 94 is further configured to: after mapping the subframe set indicated by the SA indication information, perform a first transmission of each data packet according to a predetermined rule.
  • the retransmissions are respectively mapped to the subframes included in the subframe set; wherein the predetermined rule is to map the first transmission and the retransmission of the first packet to the first transmission and the retransmission of the next data packet.
  • the data packets to be transmitted by using the foregoing predetermined rules are sequentially mapped into the subframe set, so that each data packet can be transmitted on the corresponding transmission subframe, thereby further improving channel resource utilization. Rate and data transfer rate.
  • the network side entity includes any one of the following: an evolved base station eNB, a relay station RN, a cell coordination entity MCE, a gateway GW, a mobility management device MME, and an evolved universal terrestrial radio access network EUTRAN , operations management, and maintenance of the OAM Manager.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM).
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • the processor performs the above steps S1, S2 according to the stored program code in the storage medium.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they can be stored in the storage device Executed by the computing device, and in some cases, the steps shown or described may be performed in an order different than that herein, or they may be fabricated into individual integrated circuit modules, or multiple of them. Or the steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.
  • the method and apparatus for determining a communication resource provided by the embodiment of the present invention have the following beneficial effects: the data transmission delay caused by data transmission through the period of the data resource pool in D2D communication in the related art is solved. Larger problems, in turn, have the effect of shortening the data transmission delay.

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

Abstract

La présente invention concerne un procédé et un dispositif permettant de déterminer une ressource de communication. Le procédé consiste à : acquérir des informations d'instruction d'attribution de planification (SA) pour une communication de dispositif à dispositif (D2D) ; et déterminer, selon une règle de correspondance entre les informations d'instruction de SA et un paquet de données à transmettre, une ressource de communication en vue de transmettre le paquet de données à transmettre. La présente invention aborde le problème de l'état de la technique selon lequel un retard d'envoi de données dans une communication D2D est long étant donné que les données sont envoyées dans une période d'un groupe de ressources de données, et permet, par conséquent, de réduire le délai d'envoi de données.
PCT/CN2016/110109 2016-02-04 2016-12-15 Procédé et dispositif de détermination de ressource de communication Ceased WO2017133334A1 (fr)

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