WO2017066941A1 - Dispositif de communication, dispositif de réseau, et procédé de transmission de données de dispositif à dispositif - Google Patents

Dispositif de communication, dispositif de réseau, et procédé de transmission de données de dispositif à dispositif Download PDF

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Publication number
WO2017066941A1
WO2017066941A1 PCT/CN2015/092436 CN2015092436W WO2017066941A1 WO 2017066941 A1 WO2017066941 A1 WO 2017066941A1 CN 2015092436 W CN2015092436 W CN 2015092436W WO 2017066941 A1 WO2017066941 A1 WO 2017066941A1
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Prior art keywords
indication
mac pdu
communication device
transmission
resource reservation
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PCT/CN2015/092436
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English (en)
Chinese (zh)
Inventor
李明超
施艺
韩广林
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华为技术有限公司
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Priority to CN201580072141.7A priority Critical patent/CN107113819B/zh
Priority to PCT/CN2015/092436 priority patent/WO2017066941A1/fr
Publication of WO2017066941A1 publication Critical patent/WO2017066941A1/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

Definitions

  • the present application relates to the field of wireless communications, and in particular, to a communication device, a network device, and a device-to-device data transmission method.
  • the vehicle can communicate with the vehicle (Vehicle to Vehicle, V2V) to obtain V2V data including other vehicle speeds, driving directions, specific positions, and emergency braking. According to the obtained V2V data, the road condition information is obtained, so that the driver can better perceive the traffic condition outside the line of sight according to the acquired road condition information, thereby prejudging the dangerous situation and timely avoiding it.
  • V2V Vehicle to Vehicle
  • LTE Long Term Evolution
  • D2D Device to Device
  • V2V data can also be transmitted between vehicles and vehicles by using D2D technology.
  • one resource block may be randomly selected in the resource pool, and then the V2V data to be transmitted is transmitted by using the selected resource block.
  • a resource block is randomly selected in the resource pool as a resource required for transmitting V2V data.
  • V2V data For the V2V service type, the size of its V2V data is subject to change. For example, at some point the vehicle may start driving drastically, such as continuous acceleration, line change, cornering, and braking. The amount of V2V data generated will be larger than the capacity of a D2D resource block. In this case, it is impossible to use the one generated by the D2D resource block. There is V2V data, so multiple D2D resource blocks are needed to transfer these V2V data. Obviously, using multiple D2D resource block transmissions will increase the collision probability of transmission resources, resulting in lower data transmission efficiency.
  • Embodiments of the present invention provide a communication device paging method and apparatus, which can ensure transmission reliability when D2D data is larger than one transmission resource block.
  • a device to device D2D data transmission method is characterized by comprising:
  • the communication device divides the D2D data to be transmitted into at least two D2D data packets, and encapsulates each D2D data packet into one MAC PDU;
  • the communication device sends a first MAC PDU by using a first transmission resource block, where the first MAC PDU carries a next resource reservation indication, and the next resource reservation indication is used to indicate that the second transmission resource block is
  • the communication device reserves to transmit the second MAC PDU;
  • the communication device transmits the second MAC PDU using the second transmission resource block.
  • the transmission resource block of the next MAC PDU is reserved, which can be significant.
  • the transmission collision of the latter MAC PDU is reduced, the probability of successful transmission of multiple D2D data packets is improved, and the transmission efficiency is greatly improved.
  • the first MAC PDU further includes a reservation indication, where the reservation indication is used to indicate that the communication device expects to continuously occupy a transmission resource block for transmitting the first MAC PDU for a period of time.
  • the MAC PDU may carry a reservation indication, so that the communication device reserves the transmission resource of the MAC PDU for a period of time, and the transmission success rate of the periodic data may be improved.
  • the dedicated indication is used to indicate to other communication devices that the second transmission resource block that transmits the second MAC PDU is previously sent by the communication device to another MAC PDU.
  • the next resource reservation indication in the reservation is reserved.
  • the above method of the first aspect can also enable the receiving end to detect the loss of the data packet sent by the transmitting end in time through the dedicated indication information in the MAC PDU, thereby discarding invalid data in time and improving system efficiency.
  • the MAC frame header of the MAC PDU carries an extension indication, and the extension indication indicates whether the next resource reservation indication and/or the dedicated indication is carried in the MAC PDU;
  • a fixed position in the MAC frame header is used to indicate a next resource reservation indication and/or a dedicated indication
  • the communications device Before transmitting the first MAC PDU, the communications device acquires resource reservation configuration information by using a pre-configuration or a network device configuration;
  • the resource reservation configuration information includes: a next resource reservation indication domain configuration information, which is used to indicate parameter configuration information required for reserving the next transmission resource block.
  • the resource reservation configuration information further includes:
  • Dedicated indication domain configuration information for informing the communication device that the indication field is set in the MAC PDU the way.
  • a second aspect a device-to-device D2D data transmission method, comprising:
  • the second communication device receives the first MAC PDU sent by the first communications device using the first transmission resource block;
  • the second communication device reads a next resource reservation indication from the first MAC PDU, where the next resource reservation indication is used to indicate that the second transmission resource block is reserved by the first communication device.
  • the second communication device transmits the data to be transmitted using the determined transmission resource block.
  • the transmission resource block of the next MAC PDU is reserved, which can be significant.
  • the transmission collision of the latter MAC PDU is reduced, the probability of successful transmission of multiple D2D data packets is improved, and the transmission efficiency is greatly improved.
  • the first MAC PDU further includes a reservation indication, where the reservation indication is used to indicate that the first communications device expects to continuously occupy a transmission resource block for transmitting the first MAC PDU for a period of time,
  • Determining, by the second communications device, the priority of the transport resource block according to the next resource reservation indication includes:
  • the second communication device determines, according to the next resource reservation indication and the reservation indication, a transmission resource block that is not reserved by the next resource reservation indication and the reservation indication as a highest priority ;
  • the other transmission resource blocks except the second transmission resource block reserved for the reservation are determined to have the highest priority.
  • the MAC PDU may carry a reservation indication, so that the communication device reserves the transmission resource of the MAC PDU for a period of time, and the transmission success rate of the periodic data may be improved.
  • the second MAC PDU further has a dedicated indication, the dedicated indication for indicating to the second communication device whether the second transmission resource block transmitting the second MAC PDU is previously sent by the first communication device.
  • the next resource reservation indication in the MAC PDU is reserved if the second communication device reads the second MAC PDU with a dedicated indication and does not receive the first communication device and carries the corresponding next.
  • the resource reserves the indicated first MAC PDU, and the second communication device discards the second MAC PDU.
  • the above method of the second aspect can also enable the receiving end to detect the loss of the data packet sent by the sending end through the dedicated indication information in the MAC PDU, thereby discarding the invalid data in time and improving the system efficiency.
  • determining the selection priority of the used transmission resource block from high to low is:
  • a transmission resource block that has been reserved but the next resource reservation indication in the corresponding MAC PDU indicates that no other transmission resources are reserved, and/or a transmission that has been reserved but not reserved by the next resource reservation indication of other MAC PDUs Resource block
  • a transmission resource block that has been reserved and the next resource reservation indication in the corresponding MAC PDU indicates that other transmission resources are reserved, and/or a transmission resource that has been reserved and reserved by the next resource reservation indication of other MAC PDUs.
  • the above method of the second aspect, for the receiving communication device may be based on the next resource
  • the reservation indication and the reservation indication prioritize the transmission resource blocks, and preferentially select high-priority transmission resource blocks when transmitting data, thereby reducing transmission collisions and greatly improving transmission efficiency.
  • the MAC frame header carries an extension indication, and the extension indication indicates whether the next resource reservation indication and/or the dedicated indication is carried in the MAC PDU;
  • the MAC PDU When the MAC PDU carries a next resource reservation indication and/or a dedicated indication,
  • the added new MAC subframe header is read, and the subframe header includes a dedicated logical channel identifier, and a next resource reservation indication or a dedicated indication of the data location indicated by the dedicated logical channel identifier is read.
  • the second communication device Before the second communication device transmits the D2D data packet, the second communication device acquires resource reservation configuration information by using a pre-configuration or a network device configuration;
  • the resource reservation configuration information includes: a next resource reservation indication domain configuration information, which is used to indicate parameter configuration information required for reserving the next transmission resource block.
  • the resource reservation configuration information further includes:
  • the dedicated indication domain configuration information is used to inform the communication device that the indication field is set in the MAC PDU.
  • a third aspect is a communication device, characterized in that
  • a processing unit configured to divide the D2D data to be transmitted by the communication device into at least two data packets, each data packet is encapsulated into one MAC PDU, where the encapsulated MAC PDU includes at least a first MAC PDU and a second MAC a PDU; a transmission resource is selected for each MAC PDU, and the first MAC PDU uses a first transmission resource block, and the second MAC PDU uses a second transmission resource block;
  • the source reservation indication is added to the first MAC PDU, where the next resource reservation indication is used to indicate that the second transmission resource block is reserved to transmit the second MAC PDU;
  • a sending unit configured to send the first MAC PDU by using the first transmission resource block, and send the second MAC PDU by using the second transmission resource block.
  • the processing unit is further configured to generate a reservation indication and join the first MAC PDU, where the reservation indication is used to indicate that the communication device expects to continuously occupy the transmission of transmitting the first MAC PDU for a period of time Resource block.
  • the processing unit is further configured to generate a dedicated indication and join the second MAC PDU, the dedicated indication for indicating to the other communication device that the second transmission resource block transmitting the second MAC PDU is The next resource reservation indication in the other MAC PDUs previously transmitted by the communication device is reserved.
  • the processing unit is further configured to generate an extension indication and join the MAC frame header of the MAC PDU, where the extension indication is used to indicate whether the next resource reservation indication and/or a dedicated indication is carried in the MAC PDU;
  • the MAC PDU When the MAC PDU carries a next resource reservation indication and/or a dedicated indication,
  • the processing unit further generates a next resource reservation indication and/or a dedicated indication and joins to a fixed location in the MAC frame header;
  • the processing unit further generates a new MAC subframe header and adds the MAC PDU to the MAC PDU, where the subframe header includes a dedicated logical channel identifier, where the dedicated logical channel identifier is used to indicate that the new MAC subframe header corresponds to
  • the data location is the next resource reservation indication and/or a dedicated indication.
  • the communication device further includes a storage unit, the transmitting unit is transmitting the first MAC PDU
  • the resource reservation configuration information is pre-configured in the storage unit.
  • the communication device further includes a receiving unit, where the receiving unit is configured to receive resource reservation configuration information sent by the network device, and transmit the information to the processing unit;
  • the processing unit reads the following information from the resource reservation configuration information: the next resource reservation indication domain configuration information is used to indicate parameter configuration information required for reserving the next transmission resource block.
  • the processing unit further reads from the resource reservation configuration information:
  • the dedicated indication domain configuration information is used to inform the communication device that the indication field is set in the MAC PDU.
  • a fourth aspect a communication device, characterized in that
  • a receiving unit configured to receive a first MAC PDU sent by another communications device using the first transmission resource block
  • a processing unit configured to read a next resource reservation indication from the first MAC PDU, where the next resource reservation indication is used to indicate that the second transmission resource block is reserved by the other communication device to transmit the second MAC address Determining, according to the next resource reservation indication, a priority of the transmission resource block, and determining, according to the priority of the transmission resource block, a transmission resource block used for the data to be transmitted;
  • a sending unit configured to send, by using the transmission resource block determined by the processing unit, data to be transmitted of the communication device.
  • the processing unit is further configured to read a reservation indication from the first MAC PDU, where the reservation indication is used to indicate that the first communications device expects to continuously occupy the first MAC PDU for a period of time.
  • Transfer resource blocks
  • Determining, by the processing unit, the priority of the transmission resource block according to the next resource reservation indication, that the processing unit is not to be the next resource according to the next resource reservation indication and the reservation indication The reservation resource and the transmission resource block reserved by the reservation indication are determined to have the highest priority
  • the processing unit is further configured to read, from the second MAC PDU, a dedicated indication, where the dedicated indication is used to indicate whether the second transmission resource block that transmits the second MAC PDU is previously sent by another communication device
  • the next resource reservation indication in the other MAC PDU is reserved, if the processing unit reads the dedicated indication of the second MAC PDU, and does not receive the first MAC PDU carrying the corresponding next resource reservation indication, Then the processing unit discards the second MAC PDU.
  • the processing unit determines that the selection priorities of the used transmission resources are from high to low:
  • a transmission resource block that has been reserved but the next resource reservation indication in the corresponding MAC PDU indicates that no other transmission resources are reserved, and/or a transmission that has been reserved but not reserved by the next resource reservation indication of other MAC PDUs Resource
  • a transmission resource block that has been reserved and the next resource reservation indication in the corresponding MAC PDU indicates that other transmission resources are reserved, and/or a transmission resource that has been reserved and reserved by the next resource reservation indication of other MAC PDUs.
  • the processing unit is further configured to read an extension indication from a MAC subframe header of the MAC PDU,
  • the extension indication is used to indicate whether the next resource reservation indication and/or a dedicated indication is carried in the MAC PDU;
  • the MAC PDU When the MAC PDU carries a next resource reservation indication and/or a dedicated indication,
  • the processing unit reads the next resource reservation indication and/or a dedicated indication from a fixed location in the MAC subframe header;
  • the processing unit reads an added new MAC subframe header from the MAC frame header, where the subframe header includes a dedicated logical channel identifier, and the processing unit reads the next resource pre-read from the dedicated logical channel identifier location. Leave an indication or a dedicated instruction.
  • the communication device further includes a storage unit, and the sending unit pre-configures resource reservation configuration information in the storage unit before transmitting the data to be transmitted,
  • the receiving unit is further configured to receive resource reservation configuration information sent by the network device, and transmit the information to the processing unit;
  • the processing unit reads the following information from the resource reservation configuration information: the next resource reservation indication domain configuration information is used to indicate parameter configuration information required for reserving the next transmission resource block.
  • the processing unit further reads from the resource reservation configuration information:
  • the dedicated indication domain configuration information is used to inform the communication device that the indication field is set in the MAC PDU.
  • a fifth aspect a method for resource reservation configuration, characterized in that
  • the network device generates resource reservation configuration information, where the resource reservation configuration information includes:
  • the resource reservation indication domain configuration information is used to indicate parameter configuration information required for reserving the next transmission resource block;
  • the network device sends the resource reservation configuration information to the terminal device.
  • the resource reservation configuration information further includes:
  • Dedicated indicator domain configuration information used to inform the communication device that the indication field is set in the MAC PDU.
  • a sixth aspect is a network device, which is applicable to a mobile communication system, where the network device includes a transmitting unit and a processing unit, where
  • a processing unit configured to generate resource reservation configuration information, and transmit the resource reservation configuration information to a transmitting unit, where the resource reservation configuration information includes: a next resource reservation indication domain configuration information, used to indicate Pre-remaining a parameter configuration information required for transmitting a resource block;
  • a transmitting unit configured to send resource reservation configuration information generated by the processing unit to the terminal device.
  • the resource reservation configuration information further includes:
  • Dedicated indicator domain configuration information used to inform the communication device that the indication field is set in the MAC PDU.
  • FIG. 1 is a schematic diagram of V2V communication performed by a vehicle according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of user equipment performing D2D communication according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of transmitting V2V data by using D2D technology according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of setting a reservation indication in a MAC PDU according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a data transmission method according to a first embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a format of a MAC PDU according to a first embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of a data transmission method according to a first embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a format of a MAC PDU carrying an extension indication according to a first embodiment of the present invention
  • FIG. 9 is a schematic diagram of a format of a first MAC PDU carrying a next resource reservation indication according to the first embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a second format of a MAC PDU carrying a next resource reservation indication according to the first embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a MAC PDU format according to a second embodiment of the present invention.
  • FIG. 12 is a schematic flowchart of a data transmission method according to a second embodiment of the present invention.
  • FIG. 13 is a schematic diagram of a format of a MAC PDU carrying an extension indication according to a second embodiment of the present invention.
  • FIG. 14 is a schematic diagram of a first MAC PDU format carrying a dedicated indication according to a second embodiment of the present invention.
  • FIG. 15 is a schematic diagram of a second MAC PDU format carrying a dedicated indication according to a second embodiment of the present invention.
  • FIG. 16 is a schematic structural diagram of a communication device according to a third embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of a network device according to a third embodiment of the present invention.
  • LTE system is taken as an example in the foregoing background, the person skilled in the art should know that the present invention is not only applicable to the LTE system, but also applicable to other wireless communication systems, such as GSM, UMTS, CDMA, and new. Network system, etc.
  • GSM Global System for Mobile communications
  • UMTS Universal Mobile Telecommunications
  • CDMA Code Division Multiple Access
  • new. Network system etc.
  • the network element involved in the present invention includes:
  • the communication device is configured to send uplink data and D2D data, receive downlink data sent by the network device, and receive D2D data sent from other communication devices.
  • Network equipment scheduling uplink data transmission and D2D transmission of the communication device, receiving uplink data sent by the communication device, processing, and scheduling and transmitting downlink data of the communication device.
  • the communication device of the present invention may be a device such as a car, a user terminal, a terminal device, and a mobile station.
  • the network device in the present invention may be a device such as a base station.
  • vehicles can obtain road condition information or receive information services in time through V2V communication.
  • the specific process of the vehicle acquiring the road condition information is that the vehicle 1 broadcasts its own vehicle speed, driving direction, specific position, whether or not the emergency brake is stepped on by V2V communication, and the vehicle is in the vicinity of the vehicle 1 at this time. That is, the vehicle 2 and the vehicle 3 can receive the information broadcast by the vehicle 1. After the vehicle 2 and the vehicle 3 successfully receive the information broadcast by the vehicle 1, the vehicle speed, the traveling direction, the specific position, and whether the emergency is stepped on can be used. The brakes and other information are informed of the road condition information.
  • V2V data is wirelessly accessed in the vehicle environment of the United States (English: wireless access in Vehicular environments, referred to as: WAVE), is called Basic Safety Message (BSM). It is called Collaborative Sensing Message in Intelligent Transportation System (ITS) in Europe. : Cooperative Awareness Message (CAM) or Decentralized Environmental Notification Message (DEMN).
  • BSM Basic Safety Message
  • CAM Cooperative Awareness Message
  • DEMN Decentralized Environmental Notification Message
  • V2V data can be transmitted by D2D technology.
  • the V2V data is collectively referred to as D2D data in various embodiments of the present invention.
  • D2D technology can be divided into D2D discovery (discovery) and D2D communication (communication), and both types of technologies have distributed transmission modes.
  • the distributed transmission mode of D2D discovery is called D2D discovery type.
  • Type) 1 the distributed transmission mode of D2D communication is called D2D communication mode (mode) 2.
  • mode 2 the contention resource pool is composed of a scheduling allocation (SA) resource pool and a data transmission resource pool.
  • SA scheduling allocation
  • SA+DATA data transmission form of the sender's communication device.
  • the communication device randomly selects an SA resource in the SA resource pool to send SA information, where the SA information indicates a time-frequency resource location of a data transmission resource pool and a modulation and coding mode, where the indicated time The frequency resource locations are also randomly selected; then the D2D data is transmitted in the indicated modulation and coding manner at the corresponding time-frequency resource locations of the data transmission resource pool.
  • the SA information sent by the sender is retrieved in the SA resource pool and successfully decoded
  • the D2D data is received according to the time-frequency resource location of the data transmission resource pool indicated by the SA, and as indicated
  • the modulation and coding method is used for decoding.
  • network resources are divided into one or more resource pools.
  • the communication device sends data by using a random free-competition mechanism, that is, a resource needs to be randomly selected in the resource pool. Blocks are used for the transmission of data. This will not Avoiding the occurrence of multiple adjacent vehicles selecting the same time-frequency resource for transmission of their own D2D data, for example, in the application scenario shown in FIG. 1, if both vehicle 2 and vehicle 3 select a certain time-frequency resource for The transmission of its own D2D data may cause collision of transmission resources, so that other vehicles (e.g., vehicle 1) cannot successfully demodulate the D2D data transmitted by the vehicle 2 and the vehicle 3.
  • other vehicles e.g., vehicle 1
  • the vehicle 2 and the vehicle 3 can respectively use one transmission resource block to ensure that the D2D data of the vehicle 2 and the vehicle 3 are transmitted in time.
  • the D2D data needs to be divided into a plurality of D2D data packets and encapsulated and sent in a plurality of MAC PDUs.
  • a reservation indication field may be set in the MAC frame header of the MAC PDU, and the reservation indication in the reservation indication field may inform all vehicles:
  • the transmission resource block of the D2D data packet is reserved for a period of time.
  • D2D data packets other than the first data packet need to use free-competition mechanism to acquire other resource blocks for transmission, and as long as there is a transmission collision of a segmented data packet, the transmission of the entire D2D data fails. What is more unfavorable is that as the density of users increases, the collision of random transmission becomes more obvious, and the performance of the packet transmission scheme is greatly reduced. This situation can have fatal adverse consequences for D2D data communication: the D2D data of the vehicle cannot be transmitted in time, and other vehicles cannot know the driving condition of the aforementioned vehicle, which may cause a traffic accident.
  • the embodiment of the present invention provides a corresponding implementation solution.
  • the present invention describes the specific implementation process of the technical solution provided by the present invention through the following embodiments.
  • the concept of this embodiment is that the transmitting communication device of the D2D communication system acquires the first transmission resource block for transmitting the first MAC PDU; when transmitting the first MAC PDU by using the first transmission resource, the MAC PDU needs to be carried A resource reservation indication field, the next resource reservation indication field reserves a second transmission resource block for transmitting the second MAC PDU. That is, the MAC sent by each transmission resource The PDU carries the next resource reservation indication field.
  • FIG. 5 The present embodiment will be specifically described below by taking FIG. 5 as an example.
  • the sender When the sender needs to send a piece of D2D data, if the D2D data volume is relatively large and a MAC PDU cannot transmit all the D2D data, the sender needs to split the D2D data into multiple data packets for transmission. Packets occupy one MAC PDU for transmission. In the example shown in FIG. 5, the transmitting end splits the D2D data into three data packets for split transmission, and the three data packets respectively occupy the first, second, and third transmission resource blocks shown in FIG. Send it.
  • the first data packet is encapsulated in a first MAC PDU for transmission, and the first MAC PDU uses the first transmission resource block in FIG.
  • the first MAC PDU format used for the first data packet transmission is as shown in FIG. 6.
  • the reservation indication field may be carried, and the reservation indication indication in the reservation indication field indicates that the sending end expects a segment.
  • the current transmission resource that is, the first transmission resource block
  • the other receiving ends receive the reservation indication, the first data transmission resource block is avoided in the reserved effective time period T1. .
  • the first MAC PDU also carries a next resource reservation indication field, and the next resource reservation indication in the next resource reservation indication field is used to indicate to other surrounding receiving ends that the sender expects to be in the future.
  • Another transmission resource that is, the second transmission resource block, is occupied in T1'.
  • the surrounding receiving end After receiving the indication, the surrounding receiving end will avoid using the second data transmission resource block as much as possible in the future period T1'.
  • the specific duration of the T1' may be preset by the system, or the communication device at the transmitting end sets and notifies the communication device of the other receiving end.
  • the transmitting end encapsulates the second data packet in the second MAC PDU, and sends the second data packet by using the second transmission resource block.
  • the second MAC PDU format used for the second data packet transmission is also shown in FIG. 6.
  • the reservation indication field may also be carried, indicating that the transmitting end expects to be within a valid period T2.
  • the current transmission resource that is, the second transmission resource block, is continuously occupied.
  • the second transmission resource block is avoided in the reserved effective time period T2.
  • the second MAC PDU further carries a next resource reservation indication field, where the indication field is used to indicate to other surrounding receiving ends that the sender expects to be in the future.
  • Another transmission resource that is, the third transmission resource block, is occupied in T2'. After receiving the indication, the surrounding receiving end will avoid using the third transmission resource block as much as possible in the future period T2'. Similar to T1', the specific duration of the T2' can be preset by the system, or the communication device at the transmitting end can set and notify the communication device of the other receiving end.
  • the next resource reservation is indicated by the first resource reservation indication in the first MAC PDU transmitted by using the first transmission resource block.
  • the indication informs the surrounding vehicle to avoid using the next resource, that is, the second transmission resource block, so that the probability that the second transmission block is successfully reserved will be greatly improved, and the probability that the same third transmission resource block is successfully reserved will be greatly improved. . Therefore, the probability that the receiving end correctly receives three data packets at the same time will greatly increase.
  • Step 701 Optionally, the network device sends the resource reservation configuration information to the communications device.
  • step 702 the communication device 1 transmits the first MAC PDU using the first transmission resource block.
  • Step 703 The other communication device receives the first MAC PDU sent by the communication device 1, determines the priority of the transmission resource block, and selects the transmission resource block with the higher priority to send the data.
  • step 704 the communication device 1 transmits the second MAC PDU using the second transmission resource block.
  • Step 705 The other communication device receives the second MAC PDU sent by the communication device 1, determines the priority of the transmission resource block, and selects the transmission resource block with the higher priority to send the data.
  • the communication device needs to obtain resource reservation configuration information, where the resource reservation configuration information can be read by reading the broadcast system information of the network device or by reading Radio Resource Control (RRC).
  • RRC Radio Resource Control
  • the signaling is obtained.
  • the resource reservation configuration information may also be obtained in a pre-configured manner. For this manner, the resource reservation configuration information is pre-configured to all communications.
  • the device is in the process, so step 701 can be omitted.
  • the resource reservation configuration information includes at least: contention resource pool information and next resource reservation indication field configuration information.
  • the contention pool information is used to indicate location information of a time-frequency resource that can be used for contention transmission; and the next resource reservation indicator field configuration information is used to indicate parameter configuration information required for reserving the next transmission resource block.
  • next resource reservation indication domain configuration information may include any one or any of the following information:
  • Next resource reservation initiation indication a function for informing the communication device network whether to allow the reservation of the next transmission resource to be enabled
  • the next resource reservation indication field setting is used to inform the communication device of the type of the next resource reservation indication field and how to set it in the MAC frame header of the MAC PDU; the different types of next resource reservation indication domain can support the resource pre-reservation
  • the remaining range is different; for example, the next resource reservation indication field setting information may indicate the bit length of the next resource reservation indication field in the MAC PDU, for example, may be 4 bits or 8 bits.
  • the 4bit reservation indication field can represent a total of 16 reserved resources in the 2 ⁇ 4, and the 8bit reservation indication field can represent a total of 256 reserved resources in the 2 ⁇ 8 manner, and those skilled in the art can reserve according to different application scenarios. Indicate the domain to set up;
  • the triggering condition is used to notify the communication device to trigger the condition for the next resource operation to be reserved.
  • the triggering condition may be that the D2D data volume to be sent is greater than the first preset threshold, that is, the D2D data to be sent.
  • the amount of D2D data to be sent is greater than the preset second pre-requisite. If the threshold is set and is less than the third preset threshold, that is, if the number of D2D to be sent is too large, the data to be sent may not be D2D data used for communication between vehicles, and no reservation is needed.
  • the communication device After the communication device obtains the resource reservation configuration information, the communication device completes the competition according to the contention pool resource information and the next resource reservation indication domain configuration information in the resource reservation configuration information. The parameters required to reserve the next transmission resource block in the resource pool Set.
  • the communication device when the communication device obtains the contention of the competition resource pool from the resource reservation configuration information, the location of the time-frequency resource that can be used for the contention mode transmission is obtained, so that the time-frequency resource can be used; when the communication device reserves the configuration from the resource reservation After the next resource reservation indication domain configuration information is obtained in the information, the next resource reservation initiation indication may be used to learn whether the network is allowed to open the function of reserving the next transmission resource; if the function of reserving the next transmission resource is allowed to be enabled, The communication device may further learn the type of the next resource reservation indication field according to the next resource reservation indication field setting and how to set it in the MAC frame header of the MAC PDU; if the function of reserving the next transmission resource is allowed to be enabled, the communication device The condition that the communication device triggers to reserve the next resource operation may be further learned according to the trigger condition.
  • the D2D data transmission process is described by taking the communication device 1 as an example.
  • the communication device 1 wants to send a piece of D2D data, and the D2D data is divided into a plurality of data packets, for example, a first data packet and a second data packet.
  • the data packets are respectively encapsulated in the first MAC PDU and the second MAC PDU.
  • the communication device 1 transmits the first MAC PDU encapsulated with the first data packet to the communication device 2 using the first transmission resource block.
  • the format of the first MAC PDU is as shown in FIG.
  • the first transmission resource block may be reserved for a long period of time, which may be 10 competing resource pool periods, so that the communication device 1 can generate the real-time during the reserved time of 10 competing resource pool periods.
  • the D2D data is transmitted to the communication device 2 using the reserved first transmission resource block.
  • the first MAC PDU further includes a next resource reservation indication field, where the next resource reservation indication field indicates a second transmission resource block, indicating that the communication device 1 expects to reserve a second transmission resource block for transmitting the remaining D2D data to be sent.
  • the second transmission resource block may be reserved for a short period of time, which may be a contention resource pool period.
  • the first MAC PDU carries an indication indicating that it is desired to reserve the first transmission resource block, that is, the reservation indication field.
  • the first MAC PDU may not carry the display indication.
  • the system has defaulted that the communication device 1 desires to reserve the first transmission resource block, that is, an implicit indication indicating that it is desired to reserve the first transmission resource block.
  • the SA corresponding to the first MAC PDU indicates in a display or implicit manner that it is desirable to reserve the first transmission resource block.
  • the communication device 2 receives the first MAC PDU transmitted by the communication device 1, and determines the priority of the transmission resource block according to the first MAC PDU.
  • the communication device 2 selects a transmission resource block using the priority of the transmission resource block determined according to the first MAC PDU.
  • the communication device 2 uses the communication device 2 to determine the priority of the transmission resource block according to the first MAC PDU, in particular, the communication device 2 implicitly expects according to the display indication of the communication device 1 in the first MAC PDU, or the system default communication device 1 To determine whether the communication device 1 has reserved the first transmission resource block for a period of time. If the communication device 1 reserves the first transmission resource quickly within a certain period of time, during the reserved time, the communication device 2 selects the first transmission resource block as much as possible in the process of performing D2D communication with other communication devices. Resource blocks are used as transmission resources. The communication device 2 receives the first MAC PDU sent by the communication device 1, and learns that the communication device 1 desires to reserve the second transmission resource block by reading the next resource reservation indication field. The communication device 2 selects a resource block other than the second transmission resource block as a transmission resource as much as possible in the process of performing D2D communication with other communication devices.
  • the selection priorities of the used transmission resources are from high to low in order: unreserved transmission resources, including idle transmission resources or transmission resources with transmission collisions;
  • the next resource reservation indication field in the corresponding MAC PDU does not reserve transmission resources of other transmission resources, and/or transmission resources that have been reserved but are not reserved by the next resource reservation indication field of other MAC PDUs; a transmission resource reserved and corresponding to the next resource reservation indication field in the corresponding MAC PDU, and/or a transmission resource reserved and reserved by the next resource reservation indication field of other MAC PDUs .
  • the transmission resource can be competitively acquired for all communication devices. Although it is possible to select these unreserved transmission resources for transmission collision, it can be determined that selecting these unreserved transmission resources does not expect to be occupied by other communication devices.
  • the transmission resource generates a collision, so the unreserved transmission resource should be the transmission resource most preferred by the communication device.
  • transmission resources with medium priority selection that is, transmission resources that have been reserved but the next resource reservation indication field in the corresponding MAC PDU does not reserve other transmission resources, or have been reserved but not under other MAC PDUs.
  • a resource reservation indicates the transmission resource reserved by the domain, although it has been reserved, but the resource is not used for packet transmission.
  • the transmission resource that has been reserved and the other resource reservation indication field in the corresponding MAC PDU is reserved for other transmission resources, or has been reserved and is under other MAC PDUs.
  • a resource reservation indicates the transmission resources reserved by the domain, which have been reserved and used for packet transmission. In the process of packet transmission, as long as one packet fails to transmit, the entire D2D data transmission will fail, and the successfully transmitted D2D packet will become useless data. Therefore, the selection priority of such transmission resources is the lowest.
  • the communication device 1 transmits the second MAC PDU encapsulated with the second data packet by using the second transmission resource block at the transmission moment corresponding to the second transmission resource block.
  • the transmission manner of the second MAC PDU is similar to the transmission manner of the first MAC PDU in step 702.
  • the format of the second MAC PDU is also as shown in FIG. 6.
  • the second MAC PDU includes a next resource reservation indication field, and the next resource reservation indication field indicates a third transmission resource block, indicating communication.
  • the device 1 expects to reserve a third transmission resource block for transmitting the remaining D2D data to be transmitted.
  • the second MAC PDU may carry an indication indicating that it is desired to reserve the second transmission resource block, that is, the reservation indication field.
  • the second MAC PDU may not carry the display indication, and the system is It has been assumed by default that the communication device 1 reserves a reservation for the second transmission resource block, i.e.
  • the SA corresponding to the second MAC PDU is displayed or implicitly The indication indicates that it is desirable to reserve the second transmission resource block.
  • the communication device 2 Since in step 703, the communication device 2 has determined the priority of the transmission resource block according to the first MAC PDU transmitted by the communication device 1, the high priority transmission resource block is used as much as possible, so that the second can be avoided as much as possible.
  • the transmission resource block transmits the D2D data, thereby reducing the data transmission collision probability of the communication device 1 using the second transmission resource block, greatly improving the probability of successful transmission of the second MAC PDU, and greatly improving the transmission efficiency.
  • the communication device 2 receives the second MAC PDU sent by the communication device 1, and determines the priority of the transmission resource block according to the second MAC PDU, and the current priority is determined in step 703. Priority update.
  • the communication device 2 selects a transmission resource block using the priority of the transmission resource block determined according to the second MAC PDU.
  • the priority of determining the transmission resource block according to the second MAC PDU is used, which is similar to step 703 and will not be described again.
  • next resource reservation indication field it may be set in the MAC frame header of the MAC PDU, or may be set in the payload of the MAC PDU.
  • the following is an example of the manners of FIG. 8, 9, and 10, A way to set the resource reservation indication field is introduced. It should be noted that, FIG. 8, 9, and 10 are only schematic diagrams of the next resource reservation indication field, and other indication fields that may exist in the MAC frame header, such as a reserved indication field, are not shown. It does not mean that the MAC frame header of the present invention may also contain other indication domain restrictions.
  • the MAC header carries an extension indication field
  • the extension indication field may indicate whether the next resource reservation indication field is carried in the MAC PDU. For example, when the extension field value is a specified value 1, it indicates that the next resource reservation indication field is carried in the MAC PDU. For the location of the next resource reservation indication field, there may be two ways in FIG. 9 and FIG.
  • a fixed bit position is directly allocated in the MAC frame header to indicate a next resource reservation indication field.
  • a new MAC subframe header is added to the next resource reservation indication field, and the subframe header includes a dedicated logical channel identifier (LCID), and the LCID is used to indicate The data location corresponding to the subframe header is the next resource reservation indication field.
  • LCID dedicated logical channel identifier
  • the flow of the foregoing method of Embodiment 1 is: when the communication device has multiple D2D data packets to be sent, by using the next resource reservation indication field in the current MAC PDU, the transmission resource block of the next MAC PDU is reserved. It can significantly reduce the transmission collision of the next MAC PDU, improve the probability of successful transmission of multiple D2D data packets, and greatly improve the transmission efficiency.
  • the MAC PDU may carry a reservation indication, so that the communication device reserves the transmission resource of the MAC PDU for a period of time, and the transmission success rate of the periodic data may be improved.
  • the transmission resource block may be prioritized according to the next resource reservation indication and the reservation indication, and the high priority transmission resource block is preferentially selected when the data is sent, thereby reducing the transmission collision. Improve transmission efficiency.
  • the communication device 1 splits the D2D data to be transmitted into the first data packet and the second data packet, respectively placed in the first MAC PDU and the second MAC PDU. Sent in. However, a transmission collision occurs when the first MAC PDU is transmitted, and the communication device 2 does not correctly receive the first MAC PDU. The communication device 2 then normally receives the second MAC PDU and stores the second data packet as valid data. Since the first data packet has been lost, although the second data packet has been correctly received, since the first data packet and the second data packet are the correct D2D data, the situation should belong to the D2D data transmission failure, and the second Packets should be discarded as invalid data.
  • the implementation 2 improves the technical solution of Embodiment 1, and adds a dedicated indication field to the MAC PDU.
  • the dedicated indication in the dedicated indication field is used to indicate whether the current data transmission resource is reserved in the next resource reservation indication of the corresponding transmission resource corresponding MAC PDU.
  • Step 1201 In the same manner as step 701 of Embodiment 1, the communication device needs to obtain resource reservation configuration information.
  • the obtaining of the resource reservation configuration information may be obtained from the network device, or may be obtained in a pre-configured manner.
  • the network device sends the resource reservation configuration information to the communication device, where the resource reservation configuration information includes at least: the contention resource pool information, the next resource reservation indication field configuration information, the contention resource pool information, and the next resource reservation indication field.
  • the meaning of the configuration information is exactly the same as that of step 701 of Embodiment 1.
  • the difference between the embodiment and the embodiment 1 is that the next resource reservation indication domain configuration information in the resource reservation configuration information further includes:
  • Dedicated indication activation indication a function for informing the communication device network whether to allow the dedicated indication to be turned on;
  • Dedicated indication domain configuration information used to inform the communication device that the indication field is set in the MAC PDU.
  • a person skilled in the art can set the dedicated indication domain according to the specific application situation.
  • Step 1202 In the same manner as step 702 of Embodiment 1, the communication device 1 transmits the first MAC PDU by using the first transmission resource block.
  • the first MAC PDU carries a next resource reservation indication field.
  • step 1203 the communication device 2 receives the first MAC PDU sent by the communication device 1.
  • the first MAC PDU may have a failure to receive, and the reason that the communication device 2 does not receive the MAC PDU sent by the communication device 1 may be a transmission collision or other factors such as channel interference.
  • Step 1204 in the same manner as step 704 of Embodiment 1, the communication device 1 transmits the second MAC PDU by using the second transmission resource block.
  • the second MAC PDU transmitted by the communication device 1 is as shown in FIG. Compared with Embodiment 1, the second MAC PDU is added with a dedicated indication field for indicating to the communication device 2 that the second transmission resource transmitting the second MAC PDU has been previously transmitted by the communication device 1
  • the next resource reservation indication field of the PDU is reserved.
  • the dedicated indication may also be added to the first MAC PDU sent in step 1202, but since it is the first MAC PDU, the value of the dedicated indication is no, that is, the first transmission resource is not previously transmitted by the communication device 1. Next resource reservation of other MAC PDUs The domain is reserved.
  • step 1205 the communication device 2 receives the second MAC PDU sent by the communication device 1, and determines whether to discard the second MAC PDU according to the dedicated indication field of the second MAC PDU.
  • the communication device 2 If the communication device 2 receives the second MAC PDU, it is learned by reading the dedicated indication information that the second transmission resource block that transmits the second MAC PDU has been reserved, but the communication device 2 does not receive the communication device before. 1 carries the first MAC PDU of the corresponding next resource reservation indication field. The communication device 2 can determine that the first MAC PDU sent by the communication device 1 before the packet loss occurs. Although the second MAC PDU has been correctly received, the D2D data of the second MAC PDU is not successfully transmitted. Therefore, the communication device 2 should discard the second MAC PDU.
  • the communication device 2 After receiving the second MAC PDU, the communication device 2 learns that the second transmission resource block that transmits the second MAC PDU is once reserved by reading the dedicated indication information, and the received communication device 1 carries the corresponding next resource pre- Leave the first MAC PDU indicating the domain. Then, it is considered that the second MAC PDU is received as valid data, and the communication device 2 buffers or transmits the second MAC PDU to the upper layer.
  • the dedicated indication it may be set in the MAC frame header of the MAC PDU, similar to the next resource reservation indication field in Embodiment 1, or may be set in the payload of the MAC PDU, as shown in FIG. 13 and FIG. 14 below.
  • the mode of 15 is an example, and the setting mode of the lower dedicated indication field is introduced.
  • the MAC header carries an extension indication field, and the extension indication field may indicate whether a dedicated indication field is carried in the MAC PDU.
  • the extension indication field value is a specified value of 2
  • Figure 14 and Figure 15 do not show the next resource reservation indication field in Embodiment 1, and the setting may be completed in the manner of Embodiment 1, and details are not described in Embodiment 2.
  • a fixed bit position is directly allocated in the MAC frame header for indicating a dedicated indication.
  • a new MAC subframe header is added to the dedicated indication field, and the subheader includes a dedicated logical channel identifier (LCID), and the LCID
  • LCID dedicated logical channel identifier
  • the data used to indicate the subheader is a dedicated indication.
  • the communication device when the communication device has multiple D2D data packets to be transmitted, not only can the probability of successful transmission of multiple D2D data packets be improved, but also the specific indication information in the MAC PDU can be used to make the receiving end timely. It detects that the data packet sent by the sender is lost, so that invalid data is discarded in time to improve system efficiency.
  • Embodiment 3 corresponds to Embodiment 1, and is a communication device and a network device that perform the data transmission method described in Embodiment 1.
  • Embodiment 3 of the present invention will be described below with reference to FIG. 16 and FIG.
  • the communication device 11601 includes the following components: a processing unit 1602, a sending unit 1603, and a receiving unit 1604.
  • the communication device 21611 has the same structure as the communication device 1, and includes the following components: a processing unit. 1612. Transmitting unit 1613, receiving unit 1614.
  • the network device 1701 includes: a processing unit 1702, and a sending unit 1703.
  • the communication device 1601, the communication device 1611, and the network device 1701 should also include other necessary components for completing their communication functions, such as a power supply unit, etc., but since the above components are not related to the present invention, they are no longer Narration.
  • Embodiment 3 corresponds to Embodiment 1
  • the concept of Embodiment 3 is the same as that of Embodiment 1
  • the data transmission method is also the same as that of Embodiment 1
  • the same portions as those of Embodiment 1 will not be described again.
  • the communication device and the network device will be described below with reference to FIG.
  • Step 701 optional step, the processing unit 1702 of the network device generates resource reservation configuration information and transmits the configuration information to the sending unit 1703, where the sending unit 1703 sends the resource reservation configuration information to the communication device 1601, the communication device 1611;
  • the receiving unit 1604 of the device 1601 and the receiving unit 1614 of the communication device 1611 receive the resource reservation configuration information transmitted by the transmitting unit 1703 of the network device 1701, and transmit the same to the respective processing unit 1602 and the processing unit 1612.
  • Said The specific information included in the resource reservation configuration information, and the channel to be transmitted are the same as those in Embodiment 1, and will not be described again.
  • the step 701 may be omitted.
  • Step 702 After the communication device 1601 and the communication device 1611 obtain the resource reservation configuration information, the processing unit 1602 and the processing unit 1612 may read the contention pool information from the resource reservation configuration information.
  • the next resource reservation indicates the domain configuration information, thereby completing the parameter configuration required to reserve the next transmission resource block in the contention resource pool.
  • the specific operations of the processing unit 1602 and the processing unit 1612 for the resource reservation configuration information are the same as the step 702 of the first embodiment, and are not described again.
  • the D2D data transmission process is described by taking the communication device 11601 as an example.
  • the communication device 1601 wants to send a piece of D2D data, and the D2D data of the processing unit 1602 is divided into a plurality of data packets, for example, the first data packet.
  • the second data packet is encapsulated in the first MAC PDU and the second MAC PDU, respectively.
  • the processing unit 1602 controls the transmitting unit 1603 to transmit the first MAC PDU encapsulated with the first data packet to the communication device 1602 using the first transmission resource block.
  • the format of the first MAC PDU is as shown in FIG.
  • the processing unit 1602 may generate a reservation indication and place it in the reservation indication field for indicating that the communication device 1602 is expecting The current first transmission resource block is continuously occupied for a period of time.
  • the first MAC PDU further includes a next resource reservation indication field, and the processing unit 1602 may generate a next resource reservation indication and be placed in a next resource reservation indication field, where the second transmission resource block is indicated. It is indicated that the communication device 1602 expects to reserve a second transmission resource block for transmitting the remaining D2D data to be transmitted.
  • the first MAC PDU may not carry the above display indication.
  • the system has defaulted that the communication device 1602 desires to reserve the first transmission resource block, that is, the indication in an implicit manner indicates that the first transmission is expected.
  • the resource block is reserved.
  • the receiving unit 1614 of the communication device 1611 receives the first MAC PDU sent by the sending unit 1603 of the communication device 1601, and transmits it to the processing unit 1612, the processing unit 1612.
  • the priority of the transmission resource block is determined according to the first MAC PDU.
  • the processing unit 1612 determines a transmission resource block to be used for transmission of data according to the priority of the transmission resource block.
  • the receiving unit 1614 of the communication device 1611 receives the first MAC PDU sent by the communication device 1601, and the processing unit 1612 learns that the communication device 1601 expects the second transmission resource by reading the next resource reservation indication in the next resource reservation indication field.
  • the block is reserved.
  • the processing unit 1612 selects a resource block other than the second transmission resource block as a transmission resource as much as possible.
  • the selection priority of the transmission resources determined by the processing unit 1612 is, in descending order, the transmission resources that are not reserved, including the idle transmission resources or the existence of the transmission collision.
  • Transmission resource; transmission resource that has been reserved and the next resource reservation indication in the corresponding MAC PDU indicates that other transmission resources are reserved, and/or has been reserved and reserved by the next resource reservation indication of other MAC PDUs.
  • the sending unit 1603 of the communication device 1601 transmits the second MAC PDU encapsulated with the second data packet by using the second transmission resource block at the transmission moment corresponding to the second transmission resource block.
  • the transmission manner of the second MAC PDU is similar to the transmission manner of the first MAC PDU in step 702.
  • the format of the second MAC PDU is also as shown in FIG. 6.
  • the processing unit 1602 may also generate a next resource reservation indication to be placed in the next resource reservation indication field of the second MAC PDU, the next The resource reservation indication indicates the third transmission resource block, indicating that the communication device 1601 expects to reserve the third transmission resource block for transmitting the remaining D2D data to be transmitted.
  • the processing unit 1602 may generate a reservation indication to be placed in the reservation indication field, where the reservation indication indicates that the communication device 1 desires to reserve the second transmission resource block.
  • the processing unit 1602 may not generate the reservation indication.
  • the system has defaulted that the communication device 1601 desires to reserve the second transmission resource block, that is, an implicit indication indicating that it is desired to reserve the second transmission resource block.
  • step 703 the processing unit 1602 of the communication device 1611 has determined the priority of the transmission resource block according to the first MAC PDU transmitted by the communication device 1601, the high priority transmission resource block is used as much as possible, and thus the communication device 1611
  • the transmitting unit 1603 can avoid using the second transmission resource block to transmit D2D data as much as possible, thereby reducing the data transmission collision probability of the communication device 1601 using the second transmission resource block, and greatly improving the probability of successful transmission of the second MAC PDU. Greatly improve transmission efficiency.
  • the receiving unit 1614 of the communication device 1611 receives the second MAC PDU transmitted by the transmitting unit 1603 of the communication device 1601, and transmits the same to the processing unit 1612, and the processing unit 1612 determines the transmission resource according to the second MAC PDU.
  • the priority of the block this time determining the priority is an update to the priority that has been determined in step 703.
  • the processing unit 1612 selects a transmission resource block according to the priority of the transmission resource block determined using the second MAC PDU.
  • the priority of the transmission resource block is determined by the communication device 1611 according to the second MAC PDU, which is similar to step 703 and will not be described again.
  • next resource reservation indication it may be set in the MAC frame header of the MAC PDU, or may be set in the payload of the MAC PDU, and the setting manner is the same as that in Embodiment 1.
  • the processing unit 1602 of the communication device 1601 generates an extension indication and joins the extension indication field in the MAC PDU, and the extension indication is used to indicate whether the next resource reservation indication is carried in the MAC PDU.
  • the location of the next resource reservation indication field there may be two ways in FIG. 9 and FIG.
  • the processing unit 1602 further generates a next resource reservation indication and joins to the next resource reservation indication domain location in the MAC frame header.
  • the processing unit 1602 further generates a new MAC subframe header and adds it to the MAC PDU, where the subframe header includes a dedicated logical channel identifier, and the dedicated logical channel identifier is used to indicate The data location corresponding to the subframe header is the next resource reservation indication.
  • Embodiment 3 The beneficial technical effects obtained in Embodiment 3 are the same as those in Embodiment 1, and will not be described again.
  • Embodiment 4 improves the scheme of Embodiment 3, and corresponds to Embodiment 2, which is a communication device and a network device that perform the data transmission method described in Embodiment 2.
  • Embodiment 3 is improved by adding a dedicated indication field to the MAC PDU.
  • the dedicated indication in the dedicated indication field is used to indicate whether the current data transmission resource is reserved in the next resource reservation indication of the corresponding transmission resource corresponding MAC PDU.
  • Step 1201 is the same as step 701 of Embodiment 3.
  • the difference between this embodiment and Embodiment 3 is that the processing unit 1702 of the network device 1701 generates and allocates the next resource reservation in the resource reservation configuration information sent by the sending unit 1703.
  • the indication domain configuration information also contains:
  • Dedicated indication activation indication a function for informing the communication device 1601, whether the communication device 1611 network allows to enable the dedicated indication;
  • Dedicated indication domain configuration information used to inform the communication device 1601, how the communication device 1611 dedicated indication field is set in the MAC PDU.
  • a person skilled in the art can set the dedicated indication domain according to the specific application situation.
  • Step 1202 In the same manner as step 702 of Embodiment 3, the communication device 1601 transmits the first MAC PDU by using the first transmission resource block.
  • the first MAC PDU carries a next resource reservation indication.
  • Step 1203 the receiving unit 1614 of the communication device 1611 receives the first MAC PDU sent by the communication device 1601.
  • the first MAC PDU may have a failure to receive, resulting in a communication device.
  • the reason why the MAC PDU transmitted by the communication device 1601 is not received by the 1611 may be a transmission collision or other factors such as channel interference.
  • Step 1204 in the same manner as step 704 of Embodiment 1, the communication device 1601 transmits the second MAC PDU by using the second transmission resource block.
  • the second MAC PDU transmitted by the communication device 1601 is as shown in FIG. Compared to Embodiment 3, the second MAC PDU is added with a dedicated indication field, and the processing unit 1602 of the communication device 1601 generates a dedicated indication and joins the second MAC PDU-specific indication field for indicating to the communication device 1611
  • the second transmission resource of the second MAC PDU has been reserved by the next resource reservation indication of other MAC PDUs previously transmitted by the communication device 1601.
  • the dedicated indication may also be added to the first MAC PDU sent in step 1202, but since it is the first MAC PDU, the value of the dedicated indication is no, that is, the first transmission resource is not previously sent by the communication device 1601.
  • the next resource reservation indication field of other MAC PDUs is reserved.
  • Step 1205 the receiving unit 1614 of the communication device 1611 receives the second MAC PDU sent by the communication device 1611 and transmits it to the processing unit 1612.
  • the processing unit 1612 determines whether to discard the first according to the dedicated indication from the dedicated indication field of the second MAC PDU. Two MAC PDUs.
  • the processing unit 1612 learns that the second transmission resource block that transmits the second MAC PDU is once reserved by reading the dedicated indication information, but the communication device 2 does not receive the previous The communication device 1 carries the first MAC PDU of the corresponding next resource reservation indication field. Then, the processing unit 1612 may determine that the first MAC PDU sent by the communication device 6101 has lost packets, and although the second MAC PDU has been correctly received, the D2D data of the second MAC PDU is not successfully transmitted. Therefore, processing unit 1612 should discard the second MAC PDU.
  • the processing unit 1612 learns that the second transmission resource block that transmits the second MAC PDU is once reserved by reading the dedicated indication information, and the receiving unit 1614 receives the communication device 1601. The first MAC PDU carrying the corresponding next resource reservation indication field. Then, the processing unit 1612 considers that the second MAC PDU is received as valid data, and the processing unit 1612 caches or transmits the second MAC PDU to the upper layer.
  • the dedicated indication it may be set in the MAC frame header of the MAC PDU, similar to the next resource reservation indication field in Embodiment 3, or may be set in the payload of the MAC PDU, as shown in FIG. 13 and FIG. 14 below.
  • the mode of 15 is an example, and the setting mode of the lower dedicated indication field is introduced.
  • processing unit 1602 of communication device 1601 generates an extension indication and joins an extension indication field in the MAC PDU, which may indicate whether a dedicated indication is carried in the MAC PDU. For example, when the extension indication is a specified value of 2, it indicates that a dedicated indication is carried in the MAC PDU. For the location of the dedicated indication, there are two ways of Figure 14 and Figure 15.
  • Mode 1 is as shown in Figure 14, where the processing unit 1602 further generates a dedicated indication and joins to the dedicated indication domain location in the MAC header.
  • the processing unit 1602 further generates a new MAC subframe header and adds it to the MAC PDU, where the subframe header includes a dedicated logical channel identifier, and the dedicated logical channel identifier is used to indicate The data location corresponding to the sub-frame header is a dedicated indication.
  • Embodiment 4 The beneficial technical effects obtained in Embodiment 4 are the same as those in Embodiment 2 and will not be described again.
  • the functional units in the various embodiments of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.

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Abstract

La présente invention concerne un procédé de transmission de données de dispositif à dispositif (D2D) caractérisé en ce qu'il comprend un dispositif de communication qui : divise des données D2D devant être transmises, en au moins deux paquets de données D2D, et encapsule chacun des paquets de données D2D dans une PDU MAC ; envoie une première PDU MAC au moyen d'un premier bloc de ressource de transmission, la première PDU MAC contenant une indication de réservation de ressource suivante qui est utilisée pour indiquer qu'un second bloc de ressource de transmission est réservé par le dispositif de communication pour envoyer une seconde MAC PDU ; et envoie la seconde PDU MAC au moyen du second bloc de ressource de transmission.
PCT/CN2015/092436 2015-10-21 2015-10-21 Dispositif de communication, dispositif de réseau, et procédé de transmission de données de dispositif à dispositif WO2017066941A1 (fr)

Priority Applications (2)

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CN112789938B (zh) * 2019-04-30 2023-10-20 Oppo广东移动通信有限公司 一种信息处理方法、用户设备、终端设备
WO2021210871A1 (fr) * 2020-04-13 2021-10-21 현대자동차주식회사 Procédé et appareil de communication de liaison latérale au moyen de ressources réservées dans un système de communication

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