WO2013143453A1 - 混合自动重传请求传输方法、装置及系统 - Google Patents

混合自动重传请求传输方法、装置及系统 Download PDF

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Publication number
WO2013143453A1
WO2013143453A1 PCT/CN2013/073230 CN2013073230W WO2013143453A1 WO 2013143453 A1 WO2013143453 A1 WO 2013143453A1 CN 2013073230 W CN2013073230 W CN 2013073230W WO 2013143453 A1 WO2013143453 A1 WO 2013143453A1
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WIPO (PCT)
Prior art keywords
user equipment
service data
feedback information
rtt
response feedback
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PCT/CN2013/073230
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English (en)
French (fr)
Inventor
吴栓栓
梁枫
袁弋非
袁明
张峻峰
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2013143453A1 publication Critical patent/WO2013143453A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867Arrangements specially adapted for the transmitter end
    • H04L1/1887Scheduling and prioritising arrangements

Definitions

  • the present invention relates to the field of communications, and in particular to a hybrid automatic repeat request transmission method, apparatus, and system.
  • BACKGROUND OF THE INVENTION Cellular communication systems have been rapidly evolving due to the reuse of limited spectrum resources.
  • UE1 user equipment 1
  • UE2 user equipment 2
  • the base station 1 transmits the user data to the base station 2 through the core network, and the base station 2 transmits the service data to the UE2 through the air interface.
  • the service data transmission from UE2 to UE1 adopts a similar processing flow.
  • FIG. 1 is a schematic diagram of cellular communication when two UEs are located in the same base station cell according to the related art.
  • UE1 and UE2 are located in the same cell, although base station 1 and base station 2 are the same site, one data transmission is performed. Two wireless spectrum resources will still be consumed.
  • the above-mentioned cellular communication method is obviously not the optimal communication method.
  • mobile communication services for example, social networking, electronic payment, and the like are more and more widely used in wireless communication systems, so that the demand for service transmission between close-range users is increasing.
  • D2D device-to-device
  • 2 is a schematic diagram of a preferred D2D communication system according to the related art.
  • the so-called D2D as shown in FIG. 2, means that the service data is not forwarded by the source user equipment and the core network, and is directly transmitted by the source user equipment to the target user equipment through the air interface.
  • This communication mode is different from the communication mode of a conventional cellular system.
  • D2D For users of short-range communication, D2D not only saves wireless spectrum resources, but also reduces the data transmission pressure of the core network.
  • traffic data is transmitted directly between UEs.
  • D2D communication uses communication resources of a cellular network
  • D2D communication can be controlled by the network side of the cellular network.
  • HARQ Hybrid Automatic Repeat Request Since the transmission process and communication process of D2D communication are different from cellular communication, D2D communication in cellular networks cannot follow the traditional cellular communication mode.
  • HARQ Hybrid Automatic Repeat Request
  • a hybrid automatic repeat request transmission method which is applied to device-to-device communication, including: a first user equipment sends service data to a second user equipment; and the first user equipment detects response feedback Information and/or authorization information, where the feedback information is used to indicate whether the second user equipment receives the service data is correct; and the response feedback information indicates that the second user equipment does not correctly receive the service data And/or when the authorization information is used to schedule the first user equipment to perform the service data retransmission, the first user equipment retransmits the service to the second user equipment according to a preset RTT.
  • the sending, by the first user equipment, the service data to the second user equipment is: the first user equipment detects the authorization information from a network side node; and when the first user equipment determines the authorization information, When the first user equipment is scheduled to send the service data, the first user equipment sends the service data to the second user equipment.
  • the first user equipment detects the response feedback information sent by the second user equipment, the first user equipment retransmits the service data to the second user equipment according to a preset RTT, including And in the case that the response feedback information indicates that the second user equipment does not correctly receive the service data, the first user equipment retransmits the service data to the second user equipment according to a preset RTT.
  • the first user equipment When the first user equipment detects the response feedback information sent by the second user equipment, the first user equipment retransmits the service data to the second user equipment according to a preset RTT, including Determining, by the first user equipment, whether the semi-persistently scheduled HARQ process is released; the response feedback information indicating that the second user equipment does not correctly receive the service data, and the semi-persistently scheduled HARQ process is not In the case of the release, the first user equipment retransmits the service data to the second user equipment according to a preset RTT.
  • the feedback delay of the second user equipment from receiving the service data to sending the response feedback information to the first user equipment is not longer than the duration of four subframes, the HARQ The RTT of the transmission is a duration of 8 subframes; or the feedback delay of the second user equipment from receiving the service data to sending the response feedback information to the first user equipment is no more than 8 subframes, The RTT is a duration of 16 subframes.
  • the second user equipment sends a feedback component of the response feedback information.
  • the frame is the first device-to-device communication transmission subframe of the second user equipment that satisfies the subframe interval of 4 or greater, and the RTT is the duration of 10 subframes, or is the same as the RTT of the cellular uplink, where
  • the subframe interval is an interval between a subframe in which the first user equipment sends the service data to the second user equipment, and a subframe in which the second user sends the response feedback information.
  • the method further includes: when determining that the first user equipment transmits the service data to the second user equipment, the first user equipment or the second user equipment sends the release half to a network side node A request that is continuously scheduled.
  • the first user equipment When the first user equipment detects the response feedback information sent by the second user equipment or the network side node, the first user equipment retransmits the service to the second user equipment according to a preset RTT.
  • the data includes: in the response feedback information, the second user equipment does not correctly receive the service data, and the first user equipment retransmits the service data to the second user equipment according to a preset RTT; and Or, in the case that the first user equipment detects the authorization information sent by the network side node, the first user equipment retransmits the service data to the second user equipment according to a preset RTT.
  • the first user equipment retransmits the service data to the second user equipment according to a preset RTT when the authorization information is used to schedule the first user equipment to perform the service data retransmission.
  • the method further includes: the second user equipment receiving the service data, and sending the response feedback information to the network side node according to whether the receiving is correct, The network side node forwards the response feedback information to the first user equipment; before the first user equipment detects the authorization information, the method further includes: the response feedback information indicating that the second user equipment is not correct When receiving the service data, the network side node sends, to the first user equipment, authorization information for scheduling the first user equipment to perform the service data retransmission.
  • the feedback delay of the second user equipment from receiving the service data to sending the response feedback information to the network side node is not longer than the duration of two subframes, where the network side The feedback delay of the node from the receipt of the response feedback information to the sending of the response feedback information and/or the authorization information to the first user equipment is not longer than the duration of two subframes, and the RTT is a duration of eight subframes; Or the feedback delay of the second user equipment from receiving the service data to sending the response feedback information to the network side node is not longer than a duration of four subframes, and the network side node receives the response from the network node The feedback delay to the first user equipment is not greater than the duration of the four subframes, and the RTT is the duration of 12 subframes or the duration of 16 subframes.
  • the feedback delay of the second user equipment from receiving the service data to sending the response feedback information is not longer than a duration of eight subframes, and the network side node receives the response from the reverse And feeding back the information to the first user equipment to forward the response feedback information or send the authorization information, where the feedback delay is not longer than 4 subframes, and the RTT is a duration of 16 subframes;
  • the feedback subframe in which the second user equipment sends the response feedback information is the first device-to-device communication transmission subframe that satisfies the subframe interval of 4 or greater, and the RTT is the duration of 20 subframes.
  • a hybrid automatic repeat request transmission method is provided, which is applied to device-to-device communication, including: a network side node receives response feedback information from a second user equipment, where the response feedback information Determining, by the second user equipment, whether the first user equipment sends the service data is correct; if the response feedback information indicates that the second user equipment does not correctly receive the service data, the network side node confirms the The first user equipment needs to retransmit the service data to the second user equipment according to a preset RTT.
  • the method further includes: the network side node does not wait for the second user equipment to send The response feedback information sends authorization information for scheduling new service data transmission to the first user equipment. Confirming, by the network side node, that the first user equipment needs to be heavy to the second user equipment according to a preset RTT if the response feedback information indicates that the second user equipment does not correctly receive the service data. And after the transmitting the service data, the network side node instructing the first user equipment to retransmit the service data to the second user equipment.
  • a hybrid automatic repeat request transmission apparatus which is applied to a first user equipment that is in device-to-device communication, and includes: a sending module, configured to send service data to the second user equipment.
  • the detecting module is configured to detect the response feedback information and/or the authorization information, where the response feedback information is used to indicate whether the second user equipment receives the service data is correct; the retransmission module is set to be the response
  • the feedback information indicates that the second user equipment does not correctly receive the service data and/or when the authorization information is used to schedule the first user equipment to perform the service data retransmission, according to a preset RTT
  • the second user equipment retransmits the service data.
  • the detecting module is further configured to detect the response feedback information sent by the second user equipment, where the retransmission module further includes: a first retransmission control module, configured to: in the response feedback information, the second If the user equipment does not correctly receive the service data, the service data is retransmitted to the second user equipment according to a preset RTT.
  • the detecting module is further configured to detect the response feedback information sent by the second user equipment, where the retransmission module includes: a determining module, configured to determine whether a semi-persistently scheduled HARQ process is released; and second retransmission control a module, configured to: in the case that the response feedback information indicates that the second user equipment does not correctly receive the service data, and the semi-persistent scheduling HARQ process is not released, according to a preset RTT to the second The user equipment retransmits the service data.
  • the retransmission module includes: a determining module, configured to determine whether a semi-persistently scheduled HARQ process is released; and second retransmission control a module, configured to: in the case that the response feedback information indicates that the second user equipment does not correctly receive the service data, and the semi-persistent scheduling HARQ process is not released, according to a preset RTT to the second The user equipment retransmits the service data.
  • the detecting module is further configured to detect the response feedback information sent by the second user equipment or the network side node, and the retransmission module is further configured to: in the response feedback information, the second user equipment If the service data is not correctly received, the service data is retransmitted to the second user equipment according to a preset RTT; and/or the detecting module is further configured to detect the authorization sent by the network side node.
  • the retransmission module is further configured to retransmit the service to the second user equipment according to a preset RTT when the authorization information is used to schedule the first user equipment to perform the retransmission of the service data. data.
  • a hybrid automatic repeat request transmission apparatus which is applied to a device-to-device communication network side node, and includes: a receiving module, configured to receive response feedback information from the second user equipment, The response feedback information indicates whether the second user equipment receives the first user equipment to send the service data is correct; the confirmation module is configured to: in the response feedback information, the second user equipment does not correctly receive the service data. If the first user equipment needs to retransmit the service data to the second user equipment according to a preset RTT.
  • the apparatus further includes a third retransmission control module, configured to: when the confirmation module confirms that the response feedback information indicates that the second user equipment does not correctly receive the service data, the device needs to follow the preset RTT After the second user equipment retransmits the service data, the first user equipment is instructed to retransmit the service data to the second user equipment.
  • the apparatus further includes a second sending module configured to forward the response feedback information to the first user equipment, and/or to the first user when determining that the second user equipment does not correctly receive the service data
  • the device sends the authorization information, where the authorization information is used to schedule the first user equipment to retransmit the service data.
  • the apparatus further includes a third sending module, configured to send the authorization information for scheduling the new service data transmission to the first user equipment without waiting for the response feedback information sent by the second user equipment.
  • a hybrid automatic repeat request transmission system comprising the above-mentioned HARQ transmission apparatus located in a first user equipment, and further comprising the above-mentioned HARQ transmission apparatus located in a network side node.
  • the present invention adopts a hybrid automatic repeat request transmission method, which is applied to a device-to-device communication environment. The method includes: the first user equipment sends service data to the second user equipment; and the first user equipment detects the response feedback information.
  • the feedback information is used to indicate whether the second user equipment receives the service data correctly; when the response feedback information indicates that the second user equipment does not correctly receive the service data and/or when the authorization information is determined for scheduling
  • the first user equipment performs service data retransmission, the first user equipment retransmits the service data to the second user equipment according to the preset round trip time, solves the problem of HARQ transmission of the D2D communication, and implements the coexistence of the D2D communication and the cellular communication.
  • the HARQ transmission is compatible, ensuring the reliability of transmission in D2D and cellular coexistence communication systems.
  • FIG. 1 is a schematic diagram of cellular communication when two UEs are located in the same base station cell according to the related art
  • FIG. 2 is a schematic diagram of a preferred D2D communication system according to the related art
  • FIG. 3 is a hybrid automatic weight according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a hybrid automatic repeat request transmission method applied to a network side according to an embodiment of the present invention
  • FIG. 5 is a hybrid automatic repeat request transmission apparatus according to an embodiment of the present invention
  • FIG. 6 is a block diagram of a preferred structure of a retransmission module 56 in a hybrid automatic repeat request transmission apparatus according to an embodiment of the present invention
  • FIG. 7 is a retransmission module in a hybrid automatic repeat request transmission apparatus according to an embodiment of the present invention
  • FIG. 8 is a block diagram showing another structure of a hybrid automatic repeat request transmission apparatus according to an embodiment of the present invention.
  • FIG. 9 is a block diagram showing a preferred configuration of a hybrid automatic repeat request transmission apparatus according to an embodiment of the present invention.
  • 10 is a schematic diagram of a frame structure in an LTE/LTE-A system according to an embodiment of the present invention; FIG.
  • FIG. 11 is a diagram of a device according to a preferred embodiment of the present invention HARQ transmission method flowchart of a communication apparatus;
  • FIG. 12 is a first schematic diagram of HARQ transmission for performing D2D communication using an uplink subframe in an FDD system according to an embodiment of the present invention;
  • FIG. 13 is a D2D for using uplink subframes in uplink and downlink configuration 1 in a TDD system according to an embodiment of the present invention;
  • FIG. 14 is a schematic diagram of HARQ transmission of communication;
  • FIG. 14 is an uplink subframe configuration in an uplink and downlink configuration 6 in a TDD system according to an embodiment of the present invention.
  • FIG. 15 is a schematic diagram 2 of HARQ transmission for D2D communication using an uplink subframe in an FDD system according to an embodiment of the present invention
  • FIG. 16 is an uplink subframe used in an FDD system according to an embodiment of the present invention
  • FIG. 17 is a schematic diagram 3 of another HARQ transmission for performing D2D communication using an uplink subframe in an FDD system according to an embodiment of the present invention
  • FIG. 18 is an FDD system according to an embodiment of the present invention.
  • FIG. 19 is a schematic diagram 3 of HARQ transmission for performing D2D communication using an uplink subframe
  • FIG. 19 is an example of using an uplink subframe in an uplink and downlink configuration 3 in a TDD system according to an embodiment of the present invention;
  • FIG. 20 is a schematic diagram of a HARQ transmission for performing D2D communication using an uplink subframe in an uplink and downlink configuration 6 in a TDD system according to an embodiment of the present invention
  • FIG. 21 is a diagram of an embodiment of the present invention.
  • FIG. 22 is a block diagram showing a preferred structure of a hybrid automatic repeat request transmission apparatus according to an embodiment of the present invention;
  • FIG. 23 is a hybrid automatic repeat request according to an embodiment of the present invention;
  • ARQ Automatic Repeat Request
  • FEC Forward Error Correction
  • a user equipment performing D2D communication may simultaneously need to perform data interaction with the network side, for example, receiving data transmitted by a network node, or transmitting data to a network node.
  • cellular communication and D2D communication coexist and are both controlled and scheduled by the network side, a potential problem is the collision of cellular communication with D2D communication.
  • the conflict between the two can be avoided by scheduling the D2D communication and the cellular communication in different resources, for example, scheduling them in different subframes.
  • the problem can be more complicated.
  • the cellular uplink uses a synchronous HARQ transmission mode, that is, after the first transmission of the data packet, the retransmission location is determined. Therefore, when the D2D transmission uses the uplink resource, if the D2D HARQ is not properly designed, the D2D transmission may collide with the retransmission of the cellular transmission.
  • the collision may not be limited to one transmission, but the transmission of all subframes of the process.
  • a hybrid automatic repeat request (HARQ) transmission method is provided, which is applied to device-to-device (D2D) communication
  • FIG. 3 is a hybrid automatic repeat request transmission according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps: Step S302: The first user equipment sends service data to the second user equipment.
  • Step S304 The first user equipment detects response feedback information (ACK/NACK, affirmative / negative acknowledgment) and / or authorization information, wherein the feedback information is used to indicate whether the second user equipment receives the service data is correct; step S306, when the response feedback information indicates that the second user equipment does not correctly receive the service data (for example, the response The feedback information is a negative acknowledgement (NACK) and/or when the authorization information is used to schedule the first user equipment to perform service data retransmission, the first user equipment follows a preset (pre-determined) HARQ process round trip time. (Round Trip Time, referred to as RTT) Retransmits the service data to the second user equipment.
  • response feedback information ACK/NACK, affirmative / negative acknowledgment
  • authorization information is used to indicate whether the second user equipment receives the service data is correct
  • the first user equipment follows a preset (pre-determined) HARQ process round trip time. (Round Trip Time, referred to as RTT) Retransmits the service data to the
  • the first user equipment for example, the source user equipment
  • the second user equipment for example, the target user equipment
  • the feedback information is received (for example, the foregoing Responding to the feedback information) and/or the authorization information, and performing retransmission of the service data if the feedback information and/or the authorization information indicates retransmission of the service data.
  • the invention solves the HARQ transmission of D2D communication in related art
  • the problem is that HARQ transmission can also be performed in the D2D communication mode, which improves the reliability of transmission in the communication system.
  • the first user equipment may detect the authorization information from the network side node; when the first user equipment determines that the authorization information is used to schedule the first user equipment to send the service data, the first user equipment sends the service data to the second user.
  • the device sends business data.
  • the D2D HARQ transmission can be controlled under the control of the network side node, and the reliability and security of the D2D HARQ transmission are improved.
  • the D2D communication between the first user equipment and the second user equipment may be performed by sending the authorization information to the first user equipment by the network side node. control.
  • the first user equipment may receive the authorization information from the network side node, and the first user equipment sends the service data to the second user equipment according to the authorization information.
  • the network side node may also use the indication information of the new service data (hereinafter, the indication information of the new service data is indicated in the authorization information as an example) Instructing the first user equipment to send new service data, or initiate a HARQ transmission process of the next D2D service data.
  • the RTT of the HARQ process of the cellular communication uplink is usually 8 subframe durations, that is, in the FDD system, after the first user equipment sends the service data to the network side in the subframe n, if the retransmission is needed Then, the first user equipment retransmits the service data to the network side in subframe n+8.
  • the D2D HARQ transmission is controlled by the network side node, if the network side node waits to receive the feedback information of the second user equipment, and then sends control signaling (for example, authorization information or HARQ indication information), The first user equipment also waits for the indication of the control signaling of the network side node to perform the retransmission or the transmission of the new service, and the first user equipment may not be able to guarantee the retransmission of the service data by the same RTT as the cellular HARQ process RTT. Therefore, in order to further reduce the conflict between the D2D HARQ process and the cellular HARQ process and improve the system resource utilization, the following preferred embodiments are provided for processing in this embodiment.
  • control signaling for example, authorization information or HARQ indication information
  • the network side node may send, to the first user equipment, authorization information for instructing the first user equipment to send new service data, without scheduling the feedback information of the second user equipment, to schedule the first user equipment. Transfer of new business data.
  • the first user equipment receives the authorization information sent by the network side node, and may not process the authorization information first, but waits to receive the response feedback information from the second user equipment, and receives feedback information after receiving the feedback information. Process it.
  • the first user equipment may ignore the foregoing authorization information and retransmit to the second user equipment according to the preset RTT.
  • the network side node sends the authorization information and the second user equipment sends the feedback.
  • the action of the information has no sequence relationship, thereby saving the processing time of the HARQ transmission between the D2D devices, and ensuring that the D2D HARQ process can be compatible or consistent with the cellular HARQ process.
  • the collision between the D2D HARQ process and the cellular HARQ process may also be avoided by using a semi-persistent scheduling manner.
  • the network side node sends the D2D semi-persistent scheduling authorization information to enable a semi-persistent scheduling.
  • the first user equipment may determine whether the semi-persistently scheduled HARQ process is released, where the release may be a semi-persistent scheduling period arrival.
  • the first user equipment and/or the second user equipment may request to release the semi-persistent scheduling process, etc.; the feedback information is sent by the second user equipment, and the feedback information indicates that the second user equipment does not correctly receive the service data, and the semi-continuous If the scheduling is not released, the first user equipment retransmits the service data to the second user equipment according to the preset RTT.
  • the network side node only performs the authorization information transmission when initializing or re-initiating the semi-persistent scheduling, and does not participate in the retransmission scheduling in the subsequent D2D HARQ transmission process, thereby saving the scheduling processing of the D2D transmission.
  • Time from the process to ensure that the D2D HARQ process can be compatible or consistent with the cellular HARQ process.
  • the first user equipment or the second user equipment may send a request for releasing the semi-persistent scheduling to the network side node.
  • the network side node when the first user equipment determines that the data transmission is completed, the network side node sends a request for releasing the semi-persistent scheduling.
  • the second user equipment receives consecutive consecutive empty data packets transmitted by the first user equipment, the data may be determined. After the transmission is completed, the second user equipment sends a request to the network side node to release the semi-persistent scheduling.
  • the feedback delay of the second user equipment from receiving the service data to sending the response feedback information to the first user equipment is no more than 4 subframes (for example, And may be equal to the duration of 4 subframes or 4 ms)
  • the RTT of the HARQ transmission is the duration of 8 subframes (for example, may be equal to 8 ms); or the second user equipment sends the response feedback information from the received service data to the first user equipment.
  • the feedback delay is not longer than the duration of 8 subframes (for example, may be equal to the duration of 8 subframes or 8 ms), RTT is the duration of 16 subframes (for example, may be equal to 16 ms); and in a time division duplex (TDD) system
  • the feedback subframe of the second user equipment that sends the response feedback information is the first device-to-device communication transmission subframe of the second user equipment that meets the interval of 4 or greater, and the RTT is 10 subframes (for example, may be equal to 10 ms) Or the same as the RTT of the cellular uplink, where the interval is a subframe in which the first user equipment sends the service data to the second user equipment and the subframe in which the second user sends the response feedback information Intervals.
  • the D2D HARQ transmission process may be configured to: the first user equipment sends the service data to the second user equipment according to the indication of the authorization information sent by the network side node; the second user equipment Sending response feedback information to the network side node according to the success or failure of the transmission service data; the network side node indicates to the first user equipment whether to perform retransmission of the service data according to the feedback information.
  • the manner indicated by the network side node may be performed by sending the indication information to the first user equipment.
  • the network side node may send the authorization information or the HARQ indicator information (HARQ Indicator) to the first user equipment, where the HARQ indication information is included.
  • the above feedback information ie, response feedback information).
  • the feedback information is from the second user equipment or the network side node and the feedback information indicates that the second user equipment does not correctly receive the service data, and/or the authorization information is from the network side node, and the authorization information is used to schedule the first user.
  • the first user equipment may retransmit the service data to the second user equipment according to the preset RTT.
  • the second user equipment may further receive the service data, and send the response feedback information to the network side node according to whether the reception is correct; the network side node forwards the response feedback information to the first user. device.
  • the transmission process is more complicated than the first two D2D HARQ transmission modes, and may occupy more HARQ transmission processes of the first user equipment, so that the HARQ transmission process of the first user equipment in the cellular system is performed. Restricted, therefore, system resource utilization can also be improved by matching the system feedback delay and the D2D HARQ transmission process.
  • the feedback delay of the second user equipment from receiving the service data to sending the feedback information to the network side node may be set to be no longer than 2 subframe durations (eg, may be equal to the duration of 2 subframes or 2ms), the feedback delay of the network side node from receiving the response feedback information to sending the feedback information to the first user equipment is not more than 2 subframe durations (for example, may be equal to the duration of 2 subframes or 2 ms), at this time, D2D
  • the predetermined RTT of the HARQ transmission process may be 8 subframe durations (eg, may be equal to 8 ms).
  • the feedback delay of the second user equipment from receiving the service data to sending the feedback information to the network side node is not more than 4 subframe durations (for example, may be equal to 4 subframe durations or 4 ms), and the network side node
  • the feedback delay of receiving the response feedback information to the first user equipment is not greater than 4 subframe durations (for example, may be equal to the duration of 4 subframes or 4 ms).
  • the RTT of the D2D HARQ transmission process may be 12 subframe durations (eg, may be equal to 12 ms) or 16 subframe durations (eg, may be equal to 16 ms).
  • the feedback delay of the second user equipment from receiving the service data to sending the feedback information to the network side node is not more than 8 subframe durations (for example, may be equal to the duration of 8 subframes or 8 ms), and the network side node
  • the feedback delay of receiving the response feedback information to send the feedback information to the first user equipment is not more than 4 subframe durations (for example, may be equal to the duration of 4 subframes or 4 ms); or conversely, setting the second user equipment to connect
  • the feedback delay of receiving the service data to send the feedback information to the network side node is not more than 4 subframe durations (for example, may be equal to the duration of 4 subframes or 4 ms), and the network side node receives the response feedback information to the first user.
  • the feedback delay of the device sending the feedback information is no more than 8 subframe durations (for example, may be equal to the duration of 8 subframes or 8 ms).
  • the RTT of the D2D HARQ transmission process may be 16 subframe durations (for example, may be equal to 16 ms).
  • the feedback subframe in which the second user equipment sends the response feedback information is the first uplink subframe that satisfies the interval of 4 or greater, or the first user equipment meets the interval greater than or equal to 4.
  • the device-to-device communication transmission subframe where the RTT of the D2D HARQ transmission process is the duration of 20 subframes, or the sum of two consecutive RTTs of the cellular uplink, where the interval is the first user equipment to the second user equipment.
  • a single D2D HARQ transmission process is the duration of 20 subframes, or the sum of two consecutive RTTs of the cellular uplink, where the interval is the first user equipment to the second user equipment.
  • the utilization of system resources of the HARQ transmission process is relatively low, but since the D2D communication is bidirectional transmission, the idle subframe of the occupied cellular communication process can be used as another D2D HARQ transmission process, for example, for the second user equipment to the first
  • the user equipment sends service data, which can also improve the utilization of system resources.
  • another hybrid automatic repeat request (HARQ) transmission method is also provided, which is applied to device-to-device communication
  • FIG. 4 is a hybrid automatic repeat request transmission applied to the network side according to an embodiment of the present invention. As shown in FIG.
  • Step S402 The network side node receives the response feedback information from the second user equipment, where the response feedback information indicates that the second user equipment receives the first user equipment. If the response data indicates that the second user equipment does not correctly receive the service data, the network side node confirms that the first user equipment needs to be heavy to the second user equipment according to the preset round trip time RTT. Pass the above business data.
  • the network side node can confirm whether the first user equipment needs to retransmit to the second user equipment according to the preset RTT by using the feedback information from the second user equipment, so that when the D2D HARQ transmission is controlled,
  • the authorization information is sent to the first user equipment without waiting for the feedback information of the second user equipment, and after the feedback information is received, if the feedback information is NACK, the authorization information sent is confirmed to be invalid. If the feedback information is ACK, the acknowledgement is sent.
  • the authorization information is valid, that is, the first user equipment performs new data transmission according to the authorization information.
  • the solution guarantees the possibility that the authorization information can be sent to the first user equipment without waiting for the feedback information, and the process used for retransmitting the service data is as compatible as possible with the HARQ process of the cellular system.
  • the problem that the HARQ transmission mode based on D2D communication does not exist in the related art is solved, so that the HARQ transmission can also be performed in the D2D communication mode, and the flexibility, reliability and compatibility of the transmission mode in the communication system are improved.
  • the D2D HARQ transmission process is: the first user equipment sends the service data to the second user equipment according to the indication of the authorization information sent by the network side node; and the second user equipment succeeds according to whether the service data is sent or not.
  • the network side node instructs the first user equipment to retransmit or send new service data according to the feedback information.
  • the network side node may instruct the first user equipment to retransmit the service data to the second user equipment.
  • the network side node may send the authorization information for scheduling the new service data transmission to the first user equipment without waiting for the response feedback information sent by the second user equipment.
  • the first user equipment can directly send the new service data according to the authorization information for scheduling the new service data transmission; and if the first user If the device fails to transmit the service data to the second user equipment, and the service data retransmission needs to be performed to the second user equipment, the first user equipment may ignore the received authorization information for scheduling the transmission of the new service data, but retransmit the service data. .
  • the network side node can confirm whether the first user equipment needs to be retransmitted through the step of step S404. If necessary (for example, the feedback information is NACK), the previously sent authorization information for scheduling new service data transmission is considered.
  • the network side node may instruct the first user equipment to retransmit the service data to the second user equipment in multiple manners.
  • the network side node may indicate by at least one of the following information: HARQ indication information, authorization information. If it is the HARQ indication information, the network side node may include the response feedback information in the indication information and send it to the first user equipment; if it is the authorization information, the network side node may set the authorization information to indicate that the first user equipment retransmits the service. data.
  • a hybrid automatic repeat request (HARQ) transmission apparatus which is applied to a device-to-device communication first user equipment, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and has been described. No longer repeat them.
  • 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 conceivable.
  • FIG. 5 is a structural block diagram of a hybrid automatic repeat request HARQ transmission apparatus according to an embodiment of the present invention. As shown in FIG. 5, the apparatus includes a transmitting module 52, a detecting module 54, and a retransmission module 56.
  • the sending module 52 is configured to send the service data to the second user equipment.
  • the detecting module 54 is connected to the sending module 52, and is configured to detect the response feedback information and/or the authorization information, where the feedback information is used to indicate the second user. Whether the device receives the service data is correct; the retransmission control module 56 is connected to the detection module 54 and configured to: when the response feedback information indicates that the second user equipment does not correctly receive the service data and/or when the authorization information is used to schedule the first user equipment
  • the indication sending module 52 retransmits the service data to the second user equipment according to the preset HARQ process round trip time RTT.
  • FIG. 6 is a block diagram of a preferred structure of the retransmission module 56 in the hybrid automatic repeat request (HARQ) transmission apparatus according to an embodiment of the present invention.
  • the detection module 54 may also be configured to detect the second user.
  • the acknowledgment feedback information sent by the device, the retransmission module 56 may further include: a first retransmission control module 62 connected to the detection module 54 and configured to: when the response feedback information indicates that the second user equipment does not correctly receive the service data
  • the indication sending module 52 retransmits the service data to the second user equipment according to the preset RTT.
  • Figure 2 is a block diagram of a preferred structure of the retransmission module 56 in the hybrid automatic repeat request (HARQ) transmission apparatus according to the embodiment of the present invention.
  • the detection module 54 may be further configured to detect the transmission by the second user equipment.
  • the retransmission module 56 may include a determining module 72 and a second retransmission control module 74, the determining module 72, configured to determine whether the semi-persistently scheduled HARQ process is released; the second retransmission control module 74, connecting The determining module 72 is configured to: when the response feedback information indicates that the second user equipment does not correctly receive the service data, and the semi-persistent scheduling HARQ process is not released, the indication sending module 52 sends the second user equipment according to the preset RTT. Retransmit business data.
  • the detecting module 54 is further configured to detect the response feedback information sent by the second user equipment or the network side node, and the retransmission module 56 may further be configured to: when the response feedback information indicates that the second user equipment does not correctly receive the service data, The instructing sending module 52 retransmits the service data to the second user equipment according to the preset RTT; and/or, the detecting module may further be configured to detect the authorization information sent by the network side node, and the retransmission module 56 may also be configured to be in the authorization information.
  • the indication sending module 52 retransmits the service data to the second user equipment according to the preset RTT.
  • FIG. 8 is a hybrid automatic repeat request according to an embodiment of the present invention
  • the device includes a receiving module 82 configured to receive feedback information from the second user equipment, wherein the feedback information feeds back the second user equipment to receive the first user Whether the device sends the service data is correct;
  • the confirmation module 84 is connected to the receiving module 82, and is configured to confirm that the first user equipment needs to follow the preset round-trip time if the response feedback information indicates that the second user equipment does not correctly receive the service data.
  • the RTT retransmits the service data to the second user equipment.
  • 9 is a block diagram of a preferred structure of a hybrid automatic repeat request (HARQ) transmission apparatus according to an embodiment of the present invention. As shown in FIG. 9, the apparatus includes all the modules in FIG. 8, and further includes a third retransmission control module. 92, The first module is connected to the confirmation module 84, and is configured to: after the confirmation module 84 confirms that the response feedback information indicates that the second user equipment does not correctly receive the service data, and then needs to retransmit the service data to the second user equipment according to the preset RTT, indicating the first The user equipment retransmits the service data to the second user equipment.
  • FIG. 21 is a block diagram of a preferred structure of a hybrid automatic repeat request (HARQ) transmission apparatus according to an embodiment of the present invention.
  • the apparatus may further include a second sending module 94 connected to the receiving module 82 and configured to Forwarding the response feedback information to the first user equipment, and/or transmitting the authorization information to the first user equipment when the second user equipment does not correctly receive the service data, where the authorization information is used to schedule the first user equipment to retransmit the service data.
  • FIG. 22 is a block diagram 3 of a preferred structure of a hybrid automatic repeat request (HARQ) transmission apparatus according to an embodiment of the present invention. As shown in FIG.
  • the apparatus may further include a third sending module 96 connected to the receiving module 82 and configured to The authorization information for scheduling the transmission of the new service data is sent to the first user equipment without waiting for the response feedback information sent by the second user equipment.
  • a hybrid automatic repeat request (HARQ) transmission system is also provided in this embodiment, and FIG. 23 is a structural block diagram of a hybrid automatic repeat request transmission system according to an embodiment of the present invention. As shown in FIG. 23, the system includes The HARQ transmission device located in the first user equipment in the D2D transmission (illustrated by taking FIG. 5 in FIG. 23), and further includes a HARQ transmission device located at the network side node in the D2D transmission (illustrated by taking FIG. 8 in FIG. 23) .
  • a HARQ transmission method and apparatus for device-to-device communication is provided, and in particular, a hybrid automatic repeat request (HARQ) for device-to-device communication in a wireless communication system in which cellular communication and device-to-device communication coexist is provided.
  • Transmission method and device The following is a scenario in which D2D communication is performed by using uplink resources in a cellular communication system, and a synchronous HARQ transmission mode is used for D2D communication as an example.
  • the following three synchronous HARQ implementations based on D2D communication are provided, but are not limited to these three types. Method to realize.
  • the hybrid automatic repeat request (HARQ) transmission method of the device-to-device communication may include: the first user equipment sends the service data to the second user equipment according to the indication of the authorization information; the second user equipment receives the service data, and The first user equipment retransmits the service data to the second user equipment at a preset time according to whether the received information is correctly sent by the acknowledgement (ACK) or the negative acknowledgement (NACK).
  • the network side node may send the authorization information to the first user equipment to trigger the transmission of the new service data by the first user equipment without waiting for the feedback information to arrive.
  • the first user equipment detects the foregoing response feedback information sent by the second user equipment; the first user equipment detects authorization information for scheduling new service data transmission; if the feedback information is NACK, the first user equipment ignores the new service data.
  • Authorization information retransmitting the service data to the second user equipment at the preset time; if the feedback information is ACK, and the first user equipment detects the authorization information for scheduling the transmission of the new service data, the first user equipment is authorized according to the foregoing An indication of the information, sending new business data.
  • the mode 2 the device-to-device communication hybrid automatic repeat request (HARQ) transmission method may include: the first user equipment sends the service data to the second user equipment according to the indication of the authorization information; the second user equipment receives the service data, And according to whether the receiving information is correctly sent ACK or NACK feedback information; if the feedback information is NACK, the first user equipment retransmits the service data to the second user equipment at a preset time.
  • the first user equipment detects the feedback information sent by the second user equipment; if the feedback information is a NACK, the first user retransmits the service data to the second user equipment at a preset time; When the ACK is ACK and the semi-persistent scheduling is not released, the first user equipment sends new service data.
  • the mode 3 the device-to-device communication hybrid automatic repeat request (HARQ) transmission method may include: the first user equipment sends the service data to the second user equipment according to the indication of the authorization information; the second user equipment receives the service data, And sending the ACK or NACK feedback information to the network side node according to whether the receiving is correct. If the feedback information is a NACK, the first user equipment retransmits the service data to the second user equipment at a preset time.
  • HARQ device-to-device communication hybrid automatic repeat request
  • the network side node may send the authorization information and/or the HARQ indication information to the first user equipment, and trigger the first user equipment to resend the service data to the second user equipment at a preset time;
  • the network side node may trigger the first user equipment to resend the service data to the second user equipment at a preset time by using the feedback information.
  • the Round Trip Time (RTT) of the D2D HARQ may be the same as the RTT of the cellular uplink.
  • the feedback delay can be determined according to the D2D subframe allocation.
  • the feedback subframe may be the first D2D transmission subframe of the second user equipment that satisfies the interval of 4 or greater, wherein the interval refers to the service data transmission subframe and the D2D transmitter of the second user equipment.
  • the interval of the frame in this case, the RTT of the D2D HARQ may be 10 or 20 milliseconds; or, the RTT of the D2D HARQ may be the same as the RTT of the cellular uplink, or two consecutive RTTs of the cellular uplink Sum.
  • the above-mentioned wireless communication method and apparatus solve the HARQ transmission problem of D2D communication in the cellular communication system, and can effectively avoid the interference of the HARQ process of the cellular communication and the HARQ process of the D2D communication, and ensure the devices in the cellular system to The efficiency and reliability of device communication.
  • the following description will be made in conjunction with the preferred embodiments.
  • a HARQ transmission apparatus for device-to-device communication is provided in the present embodiment.
  • the device is applied to a user equipment in a device-to-device communication environment, the device includes: a detecting module configured to detect authorization information and/or feedback information; a determining module; configured to determine transmission of service data according to a preset time and/or Or the time position of the retransmission; the sending module: configured to send or resend the service data of the device-to-device communication at the time position determined by the determining module according to the indication of the detecting module.
  • the device further comprises: a retransmission control module, configured to determine a data transmission behavior according to the detection result of the detection module.
  • the data transmission behavior includes: when detecting that the feedback information is a NACK, ignoring the authorization information, and instructing the sending module to resend the service data of the device to the device communication; when detecting that the feedback information is an ACK, instructing the sending module to follow the authorization
  • the indication of the information sends the device to the device to communicate new service data.
  • the data transmission behavior includes: when detecting that the feedback information is a NACK, instructing the sending module to resend the service data at a time position determined by the determining module; when detecting that the feedback information is an ACK, and determining that the HARQ transmission process is not released , Send device to device to communicate new business data.
  • the data transmission behavior includes: when the authorization information is detected, sending or resending the service data of the device to the device communication according to the indication of the authorization information; or, when the detected HARQ indication is a NACK, indicating that the sending module is in the determining module
  • the determined time location resends the device to device communication service data.
  • the feedback delay is 2 or 4 milliseconds, and the HARQ round-trip time (Round Trip Time, RTT) is the same as the RTT of the cellular uplink; or, the feedback delay is 4
  • the feedback delay is determined according to the D2D subframe allocation.
  • the feedback subframe is the first D2D transmission subframe that satisfies the interval of 4 or greater after the second user equipment receives the service data.
  • the interval is the interval between the service data transmission subframe and the D2D transmission subframe of the second user equipment; the RTT of the HARQ is 10 or 20 milliseconds; or the RTT of the HARQ is the same as the RTT of the cellular uplink, or is a cellular The sum of two consecutive RTTs of the uplink.
  • the RTT refers to the time interval between the previous transmission and the next transmission of the data packet in one HARQ process.
  • a control device for device-to-device communication HARQ transmission is also provided in the present embodiment.
  • the device is applied to a network side node of a device-to-device communication environment, the device comprising: a sending module, configured to send authorization information and/or a HARQ indication to the first user equipment; and at least one of the following modules:
  • the function of the first retransmission control module is:) comprising: a detection submodule, configured to detect ACK or NACK feedback information from the second user equipment; and a decision submodule, configured not to wait for the detection result of the detection submodule, Instructing the sending module to send the authorization information to the first user equipment to trigger the first user equipment to perform new data transmission;
  • the identification submodule is configured to identify the data transmission behavior of the first user equipment, where the identification is: When the sub-module detects that the feedback information is a NACK, the sub-module identifies that the communication behavior is that the first user equipment ignores the authorization information transmission of the new data transmission,
  • Decision module three (corresponding to the function of the third retransmission control module): comprising a detection submodule, configured to detect ACK or NACK feedback information from the second user equipment; and a decision submodule configured to be based at least on the detection submodule
  • the detection result determines that the sending module sends the authorization information and/or the HARQ indication to the first user equipment, where the HARQ indication is generated according to the feedback information detected by the detection module, and the authorization information is used for the feedback information detected according to the detection module. Instructing the first user equipment to perform data retransmission or new data transmission.
  • the feedback delay is 2 or 4 milliseconds, and the HART RTT and the cellular uplink are performed.
  • the RTT of the path is the same; or, the feedback delay is 4 milliseconds, the RTT of the HARQ is 12 or 16 milliseconds; or, the feedback delay is 8 milliseconds, and the RTT of the HARQ is 16 milliseconds.
  • the feedback delay is determined according to the D2D subframe allocation.
  • the feedback subframe is the first one after the second user equipment receives the service data.
  • the uplink RTT is the same, or the sum of two consecutive RTTs of the cellular uplink.
  • a device-to-device communication HARQ transmission method is provided. The method includes: the first user equipment sends service data to the second user equipment according to the indication of the authorization information; and the second user equipment receives the service data.
  • the receiving information correctly sends the acknowledgement ACK or the negative acknowledgement NACK; if the feedback information is a NACK, the first user equipment retransmits the service data to the second user equipment at a preset time.
  • the authorization information is sent to the first user equipment to trigger the first user equipment to perform new data transmission without waiting for the feedback information to arrive.
  • the first user equipment detects the feedback information sent by the second user equipment; the first user equipment detects the authorization information of the new data transmission; if the feedback information is a NACK, the first user equipment ignores the authorization information, at a preset time
  • the second user equipment retransmits the service data; if the feedback information is an ACK, and the authorization information of the new data transmission is detected, the first user equipment sends the new service data according to the indication of the authorization information.
  • the first user equipment detects the feedback information sent by the second user equipment; if the feedback information is a NACK, the first user retransmits the service data to the second user equipment at a preset time; if the feedback information is ACK, and When it is determined that the semi-persistent scheduling is not released, the first user equipment sends new service data. Or, if the feedback information is a NACK, sending the authorization information and/or the HARQ indication information to the first user equipment, triggering the first user equipment to resend the service data to the second user equipment at a preset time; or triggering by the feedback information The first user equipment retransmits the service data to the second user equipment at a preset time.
  • the feedback delay is 2 or 4 milliseconds, and the RTT of the HARQ is the same as the RTT of the cellular uplink; or, the feedback delay is 4 milliseconds, and the RTT of the HARQ is 12 or 16 milliseconds; or, when feedback The delay is 8 milliseconds and the HART RTT is 16 milliseconds.
  • the feedback delay is determined according to the D2D subframe allocation.
  • the feedback subframe is the first D2D transmission subframe that satisfies the interval of 4 or greater after the second user equipment receives the service data, and the interval is The interval between the service data transmission subframe and the D2D transmission subframe of the second user equipment; the RTT of the HARQ is 10 or 20 milliseconds; or the RTT of the HARQ is the same as the RTT of the cellular uplink, or is a cellular The sum of two consecutive RTTs of the uplink.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-A
  • the LTE/LTE-A system downlink is based on Orthogonal Frequency Division Multiplexing Access (OFDMA) technology, and the uplink uses SC-FDMA (Single Carrier-Frequency Division Multiplexing Access). Multiple access method.
  • OFDMA/SC-FDMA Orthogonal Frequency Division Multiplexing Access
  • communication resources are in the form of time-frequency two-dimensional.
  • uplink and downlink communication resources are divided in units of radio frames (frames) in the time direction, and each frame has a length of 10 Ms, contains 10 sub-frames of length 1 ms, each of which contains two slots of length 0.5 ms.
  • each slot includes 7 or 6 OFDM or SC-FDM symbols, where 7 and 6 correspond to the normal cyclic prefix (Normal CP) and the extended cyclic prefix respectively.
  • Extended CP As shown in Figure 10.
  • the LTE/LTE-A system is divided into two modes: a Time-Division Duplex (TDD) system and a Frequency-Division Duplex (FDD) system.
  • TDD Time-Division Duplex
  • FDD Frequency-Division Duplex
  • the FDD system uses two frequency bands for signal transmission on the downlink (network side to terminal) and uplink (terminal to network side), and the corresponding time-frequency resources are respectively referred to as downlink subframe and uplink subframe; TDD system
  • the use of one frequency band for signal transmission of both uplink and downlink is achieved by multiplexing the uplink and downlink signal transmissions in different subframes.
  • the TDD system supports seven uplink-downlink configurations according to the ratio of the number of uplink and downlink subframes, as shown in Table 1. Table 1: Up/down configuration form of subframes in TDD LTE system Uplink and downlink configuration subframe number
  • D represents a downlink subframe
  • U represents an uplink subframe
  • S represents a special subframe.
  • the S subframe includes a Downlink Pilot Time Slot (DwPTS for short), an Uplink Pilot Time Slot (UpPTS for short), and a guard interval (GP for short) between the uplink and downlink.
  • DwPTS Downlink Pilot Time Slot
  • UpPTS Uplink Pilot Time Slot
  • GP guard interval
  • service data is transmitted in a downlink shared channel (DL-SCH, Downlink Shared Channel) and an uplink shared channel (UL-SCH, Uplink Shared Channel), corresponding to physical downlink sharing of the physical layer.
  • DL-SCH downlink shared channel
  • UL-SCH Uplink Shared Channel
  • the above-mentioned authorization information is transmitted in the form of DCI (Downlink Control Information) through a Physical Downlink Control Channel (PDCCH).
  • HARQ transmission is supported. Specifically, the uplink adopts synchronous HARQ transmission mode (synchronous HARQ), and the downlink adopts asynchronous HARQ transmission mode (asynchronous HARQ).
  • a device-to-device communication HARQ transmission method includes: a first user equipment sends service data to a second user equipment according to an indication of authorization information; The service data is described, and the feedback information of whether the acknowledgement ACK or the negative acknowledgement NACK is correctly sent is received; if the feedback information is a NACK, the first user equipment retransmits the service data to the second user equipment at a preset time.
  • the network side does not wait for the arrival of the feedback information, that is, sends the authorization information to the first user equipment to trigger it to perform new data transmission.
  • the first user equipment detects feedback information sent by the second user equipment and authorization information of the new data transmission. If the feedback information is a NACK, the first user equipment ignores the authorization information, and retransmits the service data to the second user equipment at a preset time; if the feedback information is an ACK, and the authorization information of the new data transmission is detected, the first user The device sends new service data according to the indication of the authorization information of the new data transmission.
  • FIG. 11 is a flowchart of a device-to-device communication HARQ transmission method according to a preferred embodiment of the present invention. As shown in FIG.
  • Step S1102 A first user equipment sends service data to a second user equipment.
  • Step S1104 The second user equipment sends the feedback information to the first user equipment and the network side node.
  • Step S1106 The network side node does not wait for the feedback information, and sends the authorization information to the first user equipment.
  • the step and the step S1104 are required.
  • the first user equipment determines whether to perform service data retransmission according to the feedback information. If yes, go to step S1102, otherwise, go to step S1110; Step S1110, the first user equipment according to the authorization information
  • the second user equipment sends new service data.
  • the FDD system is taken as an example for description, and it is assumed that the UE uses the uplink subframe for D2D communication.
  • FIG. 12 is a first schematic diagram of HARQ transmission for performing D2D communication using an uplink subframe in an FDD system according to an embodiment of the present invention.
  • a small square represents one subframe
  • represents a subframe belonging to one HARQ process.
  • the number in the square is the subframe number
  • four radio frames are shown in FIG.
  • UE1 represents a first user equipment
  • UE2 represents a second user equipment
  • NN represents a network side node (Network Node) that controls D2D communication, and may be, for example, an eNB.
  • Network Node Network Node
  • the eNB may schedule the UE1 to perform the service by transmitting the authorization information in the subframe 4 of the radio frame 4n.
  • the data is transmitted, or the UE1 is triggered to perform retransmission of the D2D service data.
  • the service data is transmitted in the subframe 8, and the UE2 receives the service data, and the corresponding response information ACK/NACK is fed back according to whether the reception is correct.
  • the UE1 detects the corresponding feedback information in the fourth subframe after the subframe.
  • the network node does not wait for the arrival of the feedback information of the UE2, that is, sends an authorization to the UE1.
  • the subframe 6 of the radio frame 4n+1 retransmits the service data, and ignores the authorization information transmitted by the network node in the subframe 2 of the radio frame 4n+1.
  • the ignoring the authorization information means that if the UE1 detects that the feedback information is a NACK, the detection of the authorization information is not performed; or, even if the authorization information is detected, the UE1 does not perform the transmission of the new data according to the indication of the authorization information.
  • the response information fed back by the UE2 is also detected. Since the network node does not wait for the arrival of the feedback information of the UE2, it transmits the authorization information to the UE1.
  • the authorization information has been sent. If the response information detected by the network node is ACK, the service data transmitted by UE1 to UE2 is considered to be successful, and UE1 is considered to be detected in subframe 6 of radio frame 4n+1 according to subframe 2 in radio frame 4n+1.
  • the authorization information sends new service data; otherwise, the network node considers that UE1 retransmits the service data in subframe 6 of the radio frame 4n+1, and retransmits the scheduling grant information to UE1 in the subsequent transmission opportunity, scheduling it to perform new Business transmission.
  • the following is a description of the TDD system.
  • FIG. 13 is a schematic diagram 1 of HARQ transmission for performing D2D communication using an uplink subframe in an uplink and downlink configuration 1 in a TDD system according to an embodiment of the present invention, as shown in FIG.
  • line configuration 1 it is assumed that the UE uses the uplink subframe for D2D communication HARQ transmission.
  • D, S, and U respectively represent a downlink subframe, a special subframe, and an uplink subframe of cellular communication, and the meanings of the remaining abbreviations and symbols are the same as those of FIG. 12 described above.
  • the processing process of the HARQ transmission process and the user equipment side and the network side are also basically the same, and will not be described again. Taking the TDD system as an example, FIG.
  • FIG. 14 is a schematic diagram 1 of HARQ transmission for performing D2D communication using an uplink subframe in an uplink and downlink configuration 6 in a TDD system according to an embodiment of the present invention.
  • the UE performs uplink D2D communication HARQ transmission using an uplink subframe.
  • D, S, and U respectively represent a downlink subframe, a special subframe, and an uplink subframe of cellular communication, and the meanings of the remaining abbreviations and symbols are the same as those of FIG. 12 described above.
  • the processing process of the HARQ transmission process and the user equipment side and the network side are also basically the same, and will not be described again.
  • the maximum number of retransmissions when the UE performs D2D communication can be set. For example, when the UE1 detects that the response information fed back by the UE2 is a NACK, it determines whether the previous transmission has reached the maximum number of retransmissions; if the maximum number of retransmissions is reached, the UE1 does not perform the HARQ retransmission of the service data, and is detecting After scheduling the authorization information for transmitting the new service data, the new service data is sent according to the authorization information.
  • the feedback response information may be sent only once, and both UE1 and the network node detect, for example, by PUCCH resource transmission, or by multiplexing feedback information in the D2D traffic channel sent by UE2, and the multiplexing manner may refer to ACK in cellular communication. And a method of multiplexing the NACK in the PUSCH resource; or sending the feedback response information to the network node by using the PUCCH resource, for example, and transmitting the feedback response information to the UE1 through the D2D communication resource.
  • the timing of the feedback response information transmission may adopt the principle of "+4", that is, after the user equipment receives the D2D service data in the subframe k, the corresponding feedback is sent in the subframe k+4.
  • the timing of the feedback response information transmission is determined by combining the processing delay of the receiving end and the D2D process or the D2D subframe configuration of the UEs of the D2D communication, for example, after the user equipment receives the D2D service data in the subframe k. And transmitting the feedback response information in the first D2D transmission subframe of the user equipment that satisfies m ⁇ 4.
  • the subframe 3 of the radio frame 4n+1 shown in FIG. 13 may be the D2D transmission subframe of the UE2, and the UE2 transmits the feedback response information in the subframe 3; the subframe 3 of the radio frame 4n+1 shown in FIG.
  • the authorization timing of the D2D service data transmission can follow the principle of cellular uplink communication, that is, the principle of "+4" is adopted in the FDD system, and the TDD system has different definitions according to different uplink and downlink configurations, and can be referred to. The relevant agreement will not be described again.
  • the HARQ process of the D2D communication is guaranteed to be the same as the cellular communication, that is, in the FDD system, the RTT of the HARQ transmission is 8 ms, and in the TDD system, it is related to a specific uplink and downlink configuration, for example, the above TDD uplink and downlink.
  • the RTT of the D2D communication HARQ transmission is 10 ms.
  • Embodiment 2 a device-to-device communication HARQ transmission method is provided to solve the above problem, including: the first user equipment sends service data to the second user equipment according to the indication of the authorization information; Receiving the foregoing service data, and receiving feedback information of whether the acknowledgement ACK or the negative acknowledgement NACK is correctly received according to whether the reception is correct; if the feedback information is a NACK, the first user equipment retransmits the service data to the second user equipment at a preset time.
  • the first user equipment detects the response feedback information sent by the second user equipment; if the feedback information is a NACK, the first user resends the service data to the second user equipment at a preset time; The feedback information is an ACK, and the first user equipment transmits new service data when it is determined that the semi-persistent scheduling is not released. That is to say, the device-to-device communication in this example adopts a Semi-Persistent Scheduling (SPS) method.
  • SPS Semi-Persistent Scheduling
  • the UE performs uplink D2D communication HARQ transmission using an uplink subframe.
  • the meaning of each symbol and abbreviation in the figure is the same as that of FIG.
  • the eNB may initiate or re-initialize the authorization information by transmitting the authorization information in the subframe 4 of the radio frame 4n.
  • the persistently scheduled HARQ transmission or the UE1 determines that the semi-persistently scheduled HARQ process has not been released, transmits the service data in the subframe 8, and the UE2 receives the service data, and feeds back the corresponding response information ACK/NACK according to whether the reception is correct. .
  • the UE1 After transmitting the service data in the subframe 8, the UE1 detects the corresponding feedback information in the fourth subframe after the subframe. For UE1, if ACK is detected, UE1 considers that the service data transmission is successful, and determines that the semi-persistent scheduling process is not released, and continues to transmit new service data (FIG.
  • the UE1 retransmits the service data in the fourth subframe after the feedback information, that is, the subframe 6 of the radio frame 4n+1.
  • the maximum number of retransmissions when the UE performs D2D communication can be set. For example, when the UE1 detects that the response information fed back by the UE2 is a NACK, it determines whether the previous transmission has reached the maximum number of retransmissions; if the maximum number of retransmissions is reached, the UE1 does not perform the HARQ retransmission of the data packet.
  • the UE1 and/or UE2 send a release request. For example, after determining that the service data has been sent, the UE1 sends a release request to the network node. Alternatively, after determining that the service data has been sent, the UE2 sends a release request to the network node, and the UE2 determines that the UE1 continuously sends a number of empty data packets. .
  • the feedback response information sent by the UE2 to the UE1 may be sent through the PUCCH resource, or may be multiplexed by using the feedback information in the D2D traffic channel sent by the UE2, and the multiplexing manner may refer to the ACK/NACK in the cellular communication.
  • the timing of the feedback response information transmission may adopt the principle of "+4", that is, after the user equipment receives the D2D service data in the subframe k, the corresponding feedback is sent in the subframe k+4.
  • the HARQ process of the D2D communication is guaranteed to be the same as the cellular communication, that is, in the FDD system, the RTT of the HARQ transmission is 8 ms, and in the TDD system, it is related to a specific uplink and downlink configuration, for example, the above TDD uplink and downlink.
  • the RTT of the D2D communication HARQ transmission is 10 ms.
  • the method includes: the first user equipment sends service data to the second user equipment according to the indication of the authorization information; the second user equipment Receiving the service data, and transmitting feedback information of whether the acknowledgement ACK or the negative acknowledgement NACK is correctly sent according to the receiving; if the feedback information is a NACK, the first user equipment retransmits the service to the second user equipment at a preset time data.
  • the feedback information is a NACK
  • the authorization information and/or the HARQ indication information is sent to the first user equipment, and the first user equipment is triggered to resend the service data to the second user equipment at a preset time.
  • the flow of the HARQ transmission may be: the D2D communication control node schedules the first user equipment to transmit service data to the second user equipment; the first user equipment transmits the service to the second user equipment. Data; the second user equipment receives the service data, and according to the detection, whether the corresponding response message is correctly fed back; the D2D communication control node detects the response message, if it is an ACK, it considers that the service data transmission is successful; if it is a NACK, triggers the first The user equipment retransmits the service data to the second user equipment at a preset time.
  • the D2D communication control node may be a network side node, such as an eNB.
  • the signaling for triggering the retransmission of the first user equipment may be the authorization information sent by the D2D communication control node, or may be the HARQ Indicator (HI) information.
  • Example 3 sub-example 1 Taking the FDD system as an example, FIG. 16 is a schematic diagram 3 of HARQ transmission for performing D2D communication using an uplink subframe in an FDD system according to an embodiment of the present invention. As shown in FIG. 16, it is assumed that the UE performs uplink D2D communication HARQ transmission using an uplink subframe. The meanings of the abbreviations and symbols in the figures are the same as in Example 1.
  • the response delay of the service data cannot be fed back according to the feedback delay of the LTE cellular communication, and the feedback delay may be reset, for example, the feedback delay is set to 2 ms.
  • the authorized transmission delay can follow the rules of cellular communication, ie 4ms.
  • the HARQ process of the D2D communication is guaranteed to be the same as the cellular communication, that is, in the FDD system, the RTT of the HARQ transmission is 8 ms. This introduction of D2D communication in a cellular communication system can minimize the impact of D2D communication.
  • FIG. 17 is a schematic diagram 3 of another HARQ transmission for performing D2D communication using an uplink subframe in an FDD system according to an embodiment of the present invention. As shown in FIG. 17, it is assumed that the UE uses an uplink subframe for D2D communication. HARQ transmission.
  • indicates a subframe belonging to one cellular HARQ process, and its meaning with each abbreviation and symbol is the same as that of the example 1.
  • the response delay of the service data may follow the feedback delay rule of the LTE cellular communication, that is, the feedback delay in the FDD system adopts the principle of "+4", that is, the feedback delay is 4 ms.
  • Authorized transmission timing can also follow the rules of cellular communication, which is also the "+4" principle in FDD systems.
  • the HARQ process of D2D communication is different from cellular communication. For example, in the example of Fig.
  • the RTT of the HARQ transmission is 12 ms
  • the RTT of the HARQ transmission in the FDD cellular system is 8 ms.
  • the transmission of such a D2D HARQ process occupies two HARQ processes of cellular communication.
  • the D2D communication may be two-way communication, that is, the user equipments of both communication parties send service data to the other user equipment
  • the subframes of the two cellular HARQ processes may be allocated to the two links of the D2D according to the D2D HARQ process. For example, in FIG.
  • two cellular HARQ processes occupied by D2D communication may constitute three D2D HARQ processes: subframe 8 of radio frame 4n, subframe 0 of radio frame 4n+2, and radio frame 4n+3.
  • Subframe 2 belongs to one HARQ process; subframe 4 of radio frame 4n, subframe 6 of radio frame 4n+1 and subframe 8 of radio frame 4n+2 belong to one HARQ process; subframe 0 of radio frame 4n, radio frame 4n+l subframe 2, radio frame 4n+2 Subframe 4 and subframe 6 of radio frame 4n+3 belong to one HARQ process.
  • the first D2D HARQ process is used for UE1 to transmit to UE2, the second D2D HARQ process is used for UE2 to transmit to UE1, and so on, and details are not described herein.
  • Embodiment 3 Sub-example 3 Under the HARQ process of this embodiment, another HARQ transmission method under HARQ timing can be considered. Taking the FDD system as an example, FIG. 18 is a schematic diagram 3 of another HARQ transmission for performing D2D communication using an uplink subframe in an FDD system according to an embodiment of the present invention. As shown in FIG. 18, it is assumed that the UE uses an uplink subframe for D2D communication. HARQ transmission.
  • FIG. 20 is a schematic diagram 3 of HARQ transmission for performing D2D communication using an uplink subframe in an uplink and downlink configuration 6 in a TDD system according to an embodiment of the present invention
  • FIG. 20 is a HARQ transmission in a TDD uplink and downlink configuration 6.
  • the HARQ process of the D2D communication is different from the cellular communication.
  • the RTT of the HARQ transmission is 16 ms, which is twice the interval between the retransmission and the first transmission in the FDD cellular communication. .
  • the transmission of such a D2D HARQ process occupies half of the subframes in the HARQ process of cellular communication.
  • the D2D communication may be two-way communication, that is, the user equipments of both communication parties send service data to the other user equipment, the other half of the subframe corresponding to the one cellular HARQ process may be allocated to the D2D as a D2D HARQ process.
  • the peer user equipment of the communication is used for data transmission. This embodiment is applicable to both the FDD system and the TDD system.
  • the response feedback delay of the service data may be the same as the cellular communication.
  • the response feedback delay of the service data may be determined by a configuration of a D2D subframe or a process, that is, the feedback response information is transmitted in a D2D transmission subframe of the user equipment at the receiving end of the service data.
  • the subframe 6 of the radio frame 4n+1 is a D2D subframe for the UE2 to transmit to the UE1
  • the UE2 may be in the radio frame for the service data received in the subframe 8 of the radio frame 4n.
  • the method of transmission may refer to a transmission method in which ACK/NACK is multiplexed in the PUSCH during cellular communication.
  • acknowledgment feedback information of subframe k corresponding to service data reception of subframe k-8; if NACK is detected in subframe k, and/or detected in subframe k+4
  • the service data is retransmitted in the subframe k+8.
  • D2D communication as shown in FIGS. 19 and 20.
  • the sender user equipment of the service data may also detect the feedback response information, that is, the network node that controls the D2D communication detects that the feedback response information is
  • the authorization information may be sent to trigger the UE1 to perform retransmission of the service data, or the authorization information may not be sent, but the feedback response information triggers the UE1 to perform retransmission.
  • software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.
  • a storage medium is also provided, the software being stored, including but not limited to an optical disk, a floppy disk, a hard disk, a rewritable memory, and the like.
  • the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.

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Abstract

本发明公开了一种混合自动重传请求传输方法、装置及系统,应用于设备到设备通信,该方法包括:第一用户设备向第二用户设备发送业务数据;第一用户设备检测应答反馈信息和/或授权信息,其中,该反馈信息用于表示第二用户设备接收业务数据是否正确;当该应答反馈信息表示第二用户设备没有正确接收业务数据和/或当判断该授权信息用于调度第一用户设备进行业务数据重传时,第一用户设备按照预设的往返时间向第二用户设备重传业务数据。通过本发明,解决了D2D通信的HARQ传输问题,并且实现了D2D通信与蜂窝通信共存时的HARQ传输兼容,保证了D2D与蜂窝共存通信系统中传输的可靠性。

Description

混合自动重传请求传输方法、 装置及系统 技术领域 本发明涉及通信领域, 具体而言, 涉及一种混合自动重传请求传输方法、 装置及 系统。 背景技术 蜂窝通信系统由于实现了对有限频谱资源的复用, 使得无线通信技术得到了蓬勃 发展。 在蜂窝系统中, 当两个用户设备 (User Equipment, 简称为 UE) 之间有业务需 要传输时, 用户设备 1 (UE1 ) 到用户设备 2 (UE2) 的业务数据, 会首先通过空口传 输给基站 1,基站 1通过核心网将该用户数据传输给基站 2,基站 2再将上述业务数据 通过空口传输给 UE2。 UE2到 UE1的业务数据传输采用类似的处理流程。 图 1是根据 相关技术的两 UE位于同一基站小区时的蜂窝通信示意图, 如图 1所示, 当 UE1和 UE2位于同一个蜂窝小区, 那么虽然基站 1和基站 2是同一个站点, 一次数据传输仍 然会消耗两份无线频谱资源。 由此可见, 如果用户设备 1和用户设备 2位于同一小区并且相距较近, 那么上述 的蜂窝通信方法显然不是最优的通信方式。 而实际上, 随着移动通信业务的多样化, 例如, 社交网络、 电子支付等在无线通信系统中的应用越来越广泛, 使得近距离用户 之间的业务传输需求日益增长。 因此, 设备到设备 (Device-to-Device, 简称为 D2D) 的直通通信模式日益受到广泛关注。图 2是根据相关技术的优选的 D2D通信系统示意 图, 所谓 D2D, 如图 2所示, 是指业务数据不经过基站和核心网的转发, 直接由源用 户设备通过空口传输给目标用户设备。这种通信模式区别于传统蜂窝系统的通信模式。 对于近距离通信的用户来说, D2D不但节省了无线频谱资源, 而且降低了核心网的数 据传输压力。 对于 D2D通信来说, 业务数据直接在 UE之间进行传输。 不过, 由于 D2D通信 使用蜂窝网络的通信资源, 因此 D2D通信可以由蜂窝网络的网络侧进行控制。 并且, 对于 UE来说, 进行 D2D通信的同时, 可能也存在与网络侧的蜂窝传输。 这时候, 需 要避免 UE的 D2D通信与蜂窝通信之间产生冲突, 例如, 混合自动重传请求 (Hybrid Automatic Repeat Request, 简称为 HARQ)传输的冲突。 由于 D2D通信的传输流程与 通信过程与蜂窝通信都不相同,因此蜂窝网络中的 D2D通信无法沿用传统的蜂窝通信 方式。 针对相关技术中不存在基于 D2D通信的 HARQ传输方式的问题, 目前尚未提出 有效的解决方案。 发明内容 针对相关技术中不存在基于 D2D通信的 HARQ传输方式的问题, 本发明提供了 一种混合自动重传请求 HARQ传输方法、 装置及系统, 以至少解决上述问题。 根据本发明的一个方面, 提供了一种混合自动重传请求传输方法, 应用于设备到 设备通信, 包括: 第一用户设备向第二用户设备发送业务数据; 所述第一用户设备检 测应答反馈信息和 /或授权信息, 其中, 所述反馈信息用于表示所述第二用户设备接收 所述业务数据是否正确; 当所述应答反馈信息表示所述第二用户设备没有正确接收所 述业务数据和 /或当判断所述授权信息用于调度所述第一用户设备进行所述业务数据 重传时, 所述第一用户设备按照预设的 RTT向所述第二用户设备重传所述业务数据。 所述第一用户设备向所述第二用户设备发送所述业务数据包括: 所述第一用户设 备检测来自网络侧节点的所述授权信息; 当所述第一用户设备判断所述授权信息用于 调度所述第一用户设备发送所述业务数据时, 所述第一用户设备向所述第二用户设备 发送所述业务数据。 在所述第一用户设备检测所述第二用户设备发送的所述应答反馈信息的情况下, 所述第一用户设备按照预设的 RTT向所述第二用户设备重传所述业务数据包括,在所 述应答反馈信息表示所述第二用户设备没有正确接收所述业务数据的情况下, 所述第 一用户设备按照预设的 RTT向所述第二用户设备重传所述业务数据。 在所述第一用户设备检测所述第二用户设备发送的所述应答反馈信息的情况下, 所述第一用户设备按照预设的 RTT向所述第二用户设备重传所述业务数据包括,所述 第一用户设备判断半持续调度的 HARQ进程是否被释放;在所述应答反馈信息表示所 述第二用户设备没有正确接收所述业务数据, 以及所述半持续调度的 HARQ进程没有 被释放的情况下,所述第一用户设备按照预设的 RTT向所述第二用户设备重传所述业 务数据。 在频分双工系统中, 所述第二用户设备从接收到所述业务数据至向所述第一用户 设备发送所述应答反馈信息的反馈时延不大于 4个子帧的时长, 所述 HARQ传输的 RTT为 8个子帧的时长; 或所述第二用户设备从接收到所述业务数据至向所述第一用 户设备发送所述应答反馈信息的反馈时延不大于 8个子帧的时长, 所述 RTT为 16个 子帧的时长; 在时分双工系统中, 所述第二用户设备发送所述应答反馈信息的反馈子 帧为所述第二用户设备的第一个满足子帧间隔大于等于 4 的设备到设备通信发送子 帧, 所述 RTT为 10个子帧的时长、 或者与蜂窝上行链路的 RTT相同, 其中, 所述子 帧间隔为所述第一用户设备向所述第二用户设备发送所述业务数据的子帧与所述第二 用户发送所述应答反馈信息的子帧的间隔。 该方法还包括: 在判断所述第一用户设备向所述第二用户设备传输所述业务数据 完成时, 所述第一用户设备或所述第二用户设备向网络侧节点发送释放所述半持续调 度的请求。 在所述第一用户设备检测所述第二用户设备或网络侧节点发送的应答反馈信息的 情况下,所述第一用户设备按照预设的 RTT向所述第二用户设备重传所述业务数据包 括, 在所述应答反馈信息表示所述第二用户设备没有正确接收所述业务数据, 所述第 一用户设备按照预设的 RTT 向所述第二用户设备重传所述业务数据; 和 /或, 在所述 第一用户设备检测所述网络侧节点发送的所述授权信息的情况下, 所述第一用户设备 按照预设的 RTT向所述第二用户设备重传所述业务数据包括,在判断所述授权信息用 于调度所述第一用户设备进行所述业务数据重传时, 所述第一用户设备按照预设的 RTT向所述第二用户设备重传所述业务数据。 在所述第一用户设备检测所述应答反馈信息之前, 还包括, 所述第二用户设备接 收所述业务数据, 并根据接收是否正确向所述网络侧节点发送所述应答反馈信息, 所 述网络侧节点将所述应答反馈信息转发给所述第一用户设备; 在所述第一用户设备检 测所述授权信息之前, 还包括, 在所述应答反馈信息表示所述第二用户设备没有正确 接收所述业务数据时, 所述网络侧节点向所述第一用户设备发送用于调度所述第一用 户设备进行所述业务数据重传的授权信息。 在频分双工系统中, 所述第二用户设备从接收到所述业务数据至向所述网络侧节 点发送所述应答反馈信息的反馈时延不大于 2个子帧的时长, 所述网络侧节点从接收 到所述应答反馈信息至向所述第一用户设备发送所述应答反馈信息和 /或授权信息的 反馈时延不大于 2个子帧的时长, 所述 RTT为 8个子帧的时长; 或所述第二用户设备 从接收到所述业务数据至向所述网络侧节点发送所述应答反馈信息的反馈时延不大于 4个子帧的时长, 所述网络侧节点从接收到所述应答反馈信息至向所述第一用户设备 转发所述应答反馈信息或发送所述授权信息的反馈时延不大于 4个子帧的时长, 所述 RTT为 12个子帧的时长或 16个子帧的时长; 或所述第二用户设备从接收到所述业务 数据至发送所述应答反馈信息的反馈时延不大于 8个子帧的时长, 所述网络侧节点从 接收到所述应答反馈信息至向所述第一用户设备转发所述应答反馈信息或发送所述授 权信息的反馈时延不大于 4个子帧的时长, 所述 RTT为 16个子帧的时长; 在时分双 工系统中, 所述第二用户设备发送所述应答反馈信息的反馈子帧为第一个满足子帧间 隔大于等于 4的设备到设备通信发送子帧, 所述 RTT为 20个子帧的时长、 或者是蜂 窝上行链路的连续两个 RTT之和, 其中, 所述子帧间隔为所述第一用户设备向所述第 二用户设备发送所述业务数据的子帧与所述第二用户发送所述应答反馈信息的子帧的 间隔。 根据本发明的另一方面, 提供了一种混合自动重传请求传输方法, 应用于设备到 设备通信, 包括: 网络侧节点接收来自第二用户设备的应答反馈信息, 其中, 所述应 答反馈信息表示所述第二用户设备接收第一用户设备发送业务数据是否正确; 在所述 应答反馈信息表示所述第二用户设备没有正确接收所述业务数据的情况下, 所述网络 侧节点确认所述第一用户设备需要按照预设的 RTT向所述第二用户设备重传所述业务 数据。 所述网络侧节点确认所述第一用户设备需要按照预设的 RTT向所述第二用户设备 重传所述业务数据之前, 还包括: 所述网络侧节点不等待所述第二用户设备发送的所 述应答反馈信息, 向所述第一用户设备发送用于调度新业务数据传输的授权信息。 在所述网络侧节点确认所述第一用户设备在所述应答反馈信息表示所述第二用户 设备没有正确接收所述业务数据的情况下需要按照预设的 RTT向所述第二用户设备重 传所述业务数据之后还包括, 所述网络侧节点指示所述第一用户设备向所述第二用户 设备重传所述业务数据。 所述网络侧节点通过以下信息至少之一指示所述第一用户设备向所述第二用户设 备重传所述业务数据: 所述应答反馈信息、 授权信息。 根据本发明的另一方面, 还提供了一种混合自动重传请求传输装置, 应用于处于 设备到设备通信的第一用户设备中, 包括: 发送模块, 设置为向第二用户设备发送业 务数据; 检测模块, 设置为检测应答反馈信息和 /或授权信息, 其中, 所述应答反馈信 息用于表示所述第二用户设备接收所述业务数据是否正确; 重传模块, 设置为当所述 应答反馈信息表示所述第二用户设备没有正确接收所述业务数据和 /或当判断所述授 权信息用于调度所述第一用户设备进行所述业务数据重传时,按照预设的 RTT向所述 第二用户设备重传所述业务数据。 所述检测模块还设置为检测所述第二用户设备发送的所述应答反馈信息, 所述重 传模块还包括, 第一重传控制模块, 设置为在所述应答反馈信息表示所述第二用户设 备没有正确接收所述业务数据的情况下,按照预设的 RTT向所述第二用户设备重传所 述业务数据。 所述检测模块还设置为检测所述第二用户设备发送的所述应答反馈信息, 所述重 传模块包括, 判断模块, 设置为判断半持续调度的 HARQ进程是否被释放; 第二重传 控制模块, 设置为在所述应答反馈信息表示所述第二用户设备没有正确接收所述业务 数据, 以及所述半持续调度 HARQ进程没有被释放的情况下, 按照预设的 RTT向所 述第二用户设备重传所述业务数据。 优选地, 所述检测模块还设置为检测所述第二用户设备或网络侧节点发送的所述 应答反馈信息, 所述重传模块还设置为在所述应答反馈信息表示所述第二用户设备没 有正确接收所述业务数据时,按照预设的 RTT向所述第二用户设备重传所述业务数据; 和 /或, 所述检测模块还设置为检测所述网络侧节点发送的所述授权信息, 所述重传模 块还设置为在所述授权信息用于调度所述第一用户设备进行所述业务数据重传时, 按 照预设的 RTT向所述第二用户设备重传所述业务数据。 根据本发明的另一方面, 提供了一种混合自动重传请求传输装置, 应用于设备到 设备通信的网络侧节点中, 包括: 接收模块, 设置为接收来自第二用户设备的应答反 馈信息, 其中, 所述应答反馈信息表示所述第二用户设备接收第一用户设备发送业务 数据是否正确; 确认模块, 设置为在所述应答反馈信息表示所述第二用户设备没有正 确接收所述业务数据的情况下,确认所述第一用户设备需要按照预设的 RTT向所述第 二用户设备重传所述业务数据。 该装置还包括第三重传控制模块, 设置为在所述确认模块确认所述应答反馈信息 表示所述第二用户设备没有正确接收所述业务数据的情况下需要按照预设的 RTT向所 述第二用户设备重传所述业务数据之后, 指示所述第一用户设备向所述第二用户设备 重传所述业务数据。 该装置还包括第二发送模块,设置为向所述第一用户设备转发所述应答反馈信息, 和 /或在判断所述第二用户设备没有正确接收所述业务数据时向所述第一用户设备发 送授权信息, 所述授权信息用于调度所述第一用户设备重传所述业务数据。 该装置还包括第三发送模块, 设置为不等待所述第二用户设备发送的所述应答反 馈信息, 向所述第一用户设备发送用于调度新业务数据传输的授权信息。 根据本发明的另一方面, 还提供了一种混合自动重传请求传输系统, 包括上述位 于第一用户设备中的 HARQ传输装置, 还包括上述位于网络侧节点中的 HARQ传输 装置。 通过本发明, 采用了一种混合自动重传请求传输方法, 应用于设备到设备通信的 环境, 该方法包括: 第一用户设备向第二用户设备发送业务数据; 第一用户设备检测 应答反馈信息和 /或授权信息, 其中, 该反馈信息用于表示第二用户设备接收业务数据 是否正确; 当该应答反馈信息表示第二用户设备没有正确接收业务数据和 /或当判断该 授权信息用于调度第一用户设备进行业务数据重传时, 第一用户设备按照预设的往返 时间向第二用户设备重传业务数据, 解决了 D2D通信的 HARQ传输的问题, 并且实 现了 D2D通信与蜂窝通信共存时的 HARQ传输兼容, 保证了 D2D与蜂窝共存通信系 统中传输的可靠性。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 本发 明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图 中- 图 1是根据相关技术的两 UE位于同一基站小区时的蜂窝通信示意图; 图 2是根据相关技术的优选的 D2D通信系统示意图; 图 3是根据本发明实施例的混合自动重传请求传输方法的流程图; 图 4 是根据本发明实施例的应用于网络侧的混合自动重传请求传输方法的流程 图; 图 5是根据本发明实施例的混合自动重传请求传输装置的结构框图; 图 6是根据本发明实施例的混合自动重传请求传输装置中重传模块 56的优选结构 框图一; 图 7是根据本发明实施例的混合自动重传请求传输装置中重传模块 56的优选结构 框图二; 图 8是根据本发明实施例的混合自动重传请求传输装置的另一结构框图; 图 9是根据本发明实施例的混合自动重传请求传输装置的优选结构框图一; 图 10是根据本发明实施例在 LTE/LTE-A系统的帧结构示意图; 图 11是根据本发明优选实施例的设备到设备通信的 HARQ传输方法的流程图; 图 12是根据本发明实施例在 FDD系统中使用上行子帧进行 D2D通信的 HARQ 传输的示意图一; 图 13是根据本发明实施例在 TDD系统中的上下行配置 1 下使用上行子帧进行 D2D通信的 HARQ传输的示意图一; 图 14是根据本发明实施例在 TDD系统中的上下行配置 6下使用上行子帧进行
D2D通信的 HARQ传输的示意图一; 图 15是根据本发明实施例在 FDD系统使用上行子帧进行 D2D通信的 HARQ传 输的示意图二; 图 16是根据本发明实施例在 FDD系统中使用上行子帧进行 D2D通信的 HARQ 传输的示意图三; 图 17是根据本发明实施例在 FDD系统中另外一种使用上行子帧进行 D2D通信的 HARQ传输的示意图三; 图 18是根据本发明实施例在 FDD系统中又一种使用上行子帧进行 D2D通信的 HARQ传输的示意图三; 图 19是根据本发明实施例在 TDD系统中在上下行配置 3下使用上行子帧进行
D2D通信的 HARQ传输的示意图三; 图 20是根据本发明实施例在 TDD系统中在上下行配置 6下使用上行子帧进行 D2D通信的 HARQ传输的示意图三.; 图 21是根据本发明实施例的混合自动重传请求传输装置的优选结构框图二; 图 22是根据本发明实施例的混合自动重传请求传输装置的优选结构框图三; 图 23是根据本发明实施例的混合自动重传请求传输系统的结构框图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在不冲突的 情况下, 本申请中的实施例及实施例中的特征可以相互组合。 自动重传请求 (Automatic Repeat Request, 简称为 ARQ) 是分组通信中的重要纠 错方法。而混合自动重传请求(Hybrid-ARQ)则通过在 ARQ中引入前向纠错(Forward Error Correct, 简称为 FEC), 达到减少重传次数的目的, 从而使得无线通信的系统性 能得以提升。 在支持 D2D通信的蜂窝通信系统中, 进行 D2D通信的用户设备可能同时需要与 网络侧进行数据交互, 例如接收网络节点发送的数据, 或者向网络节点发送数据。 当 蜂窝通信和 D2D通信共存并且都由网络侧进行控制和调度时,面临的一个潜在的问题 是蜂窝通信与 D2D通信的冲突。 对于数据包的首次传输, 可以通过将 D2D通信与蜂 窝通信调度在不同的资源中的方式,避免两者的冲突,例如将其调度在不同的子帧中。 但是对于重传来说, 问题可能比较复杂。 例如, 蜂窝上行链路采用同步 HARQ的传输 方式, 即数据包首传之后, 重传的位置就是确定的。 因此, 当 D2D传输使用上行资源 时, 如果 D2D HARQ设计不当, D2D传输可能与蜂窝传输的重传产生冲突。 对于蜂 窝链路同步 HARQ传输方式来说, 冲突可能不会局限于一次传输, 而是该进程的所有 子帧的传输。 另一方面, D2D通信是网络侧控制的, 也就是说控制节点不参与业务数据的传输 与接收, 而控制节点需要与数据传输与接收节点进行空口的信令交互, 这可能会导致 D2D通信相比于蜂窝通信来说流程增加。 基于上述考虑, 在本实施例中, 提供了一种混合自动重传请求 (HARQ) 传输方 法, 应用于设备到设备 (D2D) 通信, 图 3是根据本发明实施例的混合自动重传请求 传输方法的流程图, 如图 3所示, 该方法包括如下步骤: 步骤 S302, 第一用户设备向第二用户设备发送业务数据; 步骤 S304, 第一用户设备检测应答反馈信息 (ACK/NACK, 肯定 /否定应答) 和 / 或授权信息, 其中, 该反馈信息用于表示第二用户设备接收业务数据是否正确; 步骤 S306, 当应答反馈信息表示第二用户设备没有正确接收业务数据(例如, 该 应答反馈信息为否定应答 (NACK) ) 和 /或当判断授权信息用于调度第一用户设备进 行业务数据重传时,第一用户设备按照预设(pre-determined)的 HARQ进程(process) 往返时间 (Round Trip Time, 简称为 RTT) 向第二用户设备重传业务数据。 通过上述步骤,在 D2D的通信环境中,第一用户设备(例如,可以是源用户设备) 向第二用户设备 (例如, 可以是目标用户设备) 发送业务数据后, 接收反馈信息 (例 如, 上述应答反馈信息)和 /或授权信息, 并在反馈信息和 /或授权信息指示重传上述业 务数据的情况下进行业务数据的重传。 解决了相关技术中 D2D通信的 HARQ传输的 问题, 使得在 D2D通信方式下也可以进行 HARQ传输, 提高了通信系统中传输的可 靠性。 优选地, 在步骤 S302之前, 第一用户设备可以检测来自网络侧节点的授权信息; 当第一用户设备判断授权信息用于调度第一用户设备发送业务数据时, 第一用户设备 向第二用户设备发送业务数据。通过这种方式, 能够使得 D2D HARQ传输在网络侧节 点的控制之下, 提高了 D2D HARQ传输的可靠性及安全性。 为了提高 D2D传输与蜂窝传输之间的兼容性, 作为一种优选实施方式, 可以通过 网络侧节点向第一用户设备发送授权信息来对第一用户设备与第二用户设备之间的 D2D通信进行控制。 在这种情况下, 第一用户设备可以接收来自网络侧节点的授权信 息, 第一用户设备根据该授权信息向第二用户设备发送业务数据。 当然, 在一次 D2D 的业务数据传输成功或者完成之后, 网络侧节点也可以通过新的业务数据的指示信息 (在下文中以该新的业务数据的指示信息在上述授权信息中指示为例进行说明) 指示 第一用户设备发送新的业务数据, 或者发起下一个 D2D的业务数据的 HARQ传输流 程。 在 FDD系统中, 蜂窝通信上行链路的 HARQ进程的 RTT通常为 8个子帧时长, 也即在 FDD系统中, 当第一用户设备在子帧 n向网络侧发送业务数据之后, 如果需要 重传, 则第一用户设备会在子帧 n+8向网络侧重传该业务数据。而对于 D2D通信, 考 虑到当通过网络侧节点控制 D2D HARQ传输时,如果网络侧节点等待接收到第二用户 设备的反馈信息之后再发送控制信令 (例如, 授权信息或 HARQ指示信息), 而第一 用户设备也等待网络侧节点的控制信令的指示再进行重传或新业务的传输, 那么第一 用户设备就可能无法保证以与蜂窝 HARQ进程 RTT相同的 RTT进行业务数据的重传。 因此, 为了进一步减少 D2D HARQ进程与蜂窝 HARQ进程之间的冲突, 提高系统资 源利用率, 在本实施例中提供了以下几种优选实施方式进行处理。 作为一种优选实施方式一, 网络侧节点可以不等待第二用户设备的反馈信息, 就 对第一用户设备发送用于指示第一用户设备发送新业务数据的授权信息, 以调度第一 用户设备进行新业务数据的传输。 同时, 第一用户设备接收到网络侧节点发来的授权 信息, 可先不对该授权信息进行处理, 而是等待接收来自于第二用户设备的应答反馈 信息, 在接收到反馈信息后对反馈信息进行处理。 在发现应答反馈信息表示第二用户 设备没有正确接收业务数据的情况下 (例如, 为 NACK的情况下), 第一用户设备可 以忽略上述授权信息, 按照预设的 RTT向第二用户设备重传业务数据; 而当反馈信息 为肯定应答 (ACK) 的情况下, 第一用户设备按照上述授权信息的指示进行新业务数 据的发送。 通过这种方式, 网络侧节点发送授权信息的动作与第二用户设备发送反馈 信息的动作没有先后时序关系, 从而节省了 D2D设备之间 HARQ传输的处理时间, 从流程上保证了 D2D HARQ进程能够与蜂窝 HARQ进程相兼容或一致。 作为一种优选实施方式二,也可以通过半持续调度的方式来避免 D2D HARQ进程 与蜂窝 HARQ进程之间的冲突, 例如, 网络侧节点发送 D2D半持续调度授权信息, 以开启一个半持续调度的 HARQ进程。在第一用户设备接收来自第二用户设备的应答 反馈信息的情况下, 第一用户设备可以判断该半持续调度的 HARQ进程是否被释放, 其中, 这里的释放可以是半持续调度的周期到达, 也可以是第一用户设备和 /或第二用 户设备请求释放该半持续调度进程等; 在反馈信息由第二用户设备发送, 且反馈信息 表示第二用户设备没有正确接收业务数据, 以及半持续调度没有被释放的情况下, 第 一用户设备按照预设的 RTT向第二用户设备重传业务数据。通过这种方式, 网络侧节 点仅在初始化或者重新初始化半持续调度时进行了一次授权信息的发送, 不会在后续 的 D2D HARQ传输过程中参与重传的调度, 从而节省了 D2D传输的调度处理时间, 从流程上保证了 D2D HARQ进程能够与蜂窝 HARQ进程相兼容或一致。 优选地, 在第一用户设备向第二用户设备传输业务数据完成的情况下, 即数据传 输已经完成时, 第一用户设备或者第二用户设备可以向网络侧节点发送释放半持续调 度的请求。 例如, 第一用户设备判断数据传输完成时, 向网络侧节点发送释放半持续 调度的请求; 或者,第二用户设备接收到第一用户设备传输的连续若干个空数据包时, 则可判断数据传输完成, 第二用户设备向网络侧节点发送释放半持续调度的请求。 在上面两种情况下, 在频分双工 (FDD) 系统中, 第二用户设备从接收到业务数 据至向第一用户设备发送应答反馈信息的反馈时延不大于 4个子帧的时长 (例如, 可 以等于 4个子帧的时长或 4ms), HARQ传输的 RTT为 8个子帧的时长 (例如, 可以 等于 8ms);或第二用户设备从接收到业务数据至向第一用户设备发送应答反馈信息的 反馈时延不大于 8个子帧的时长 (例如, 可以等于 8个子帧的时长或 8ms), RTT为 16个子帧的时长 (例如, 可以等于 16ms); 而在时分双工 (TDD) 系统中, 第二用户设备发送应答反馈信息的反馈子帧为第 二用户设备的第一个满足间隔大于等于 4的设备到设备通信发送子帧, RTT为 10个子 帧的时长 (例如, 可以等于 10ms)、 或者与蜂窝上行链路的 RTT相同, 其中, 间隔为 第一用户设备向第二用户设备发送业务数据的子帧与第二用户发送应答反馈信息的子 帧的间隔。 作为一种优选实施方式三,还可以设置 D2D HARQ传输流程为:第一用户设备根 据网络侧节点发送的授权信息的指示, 向第二用户设备发送业务数据; 第二用户设备 根据发送业务数据的成功与否, 向网络侧节点发送应答反馈信息; 网络侧节点根据反 馈信息, 向第一用户设备指示是否进行业务数据的重传。 网络侧节点指示的方式可以 是通过向第一用户设备发送指示信息来进行, 例如, 网络侧节点可以向第一用户设备 发送授权信息或者 HARQ指示信息 (HARQ Indicator), 在该 HARQ指示信息中包含 上述反馈信息 (即应答反馈信息)。 此时, 在反馈信息来自第二用户设备或网络侧节点且该反馈信息表示第二用户设 备没有正确接收业务数据, 和 /或在授权信息来自网络侧节点, 且授权信息用于调度第 一用户设备进行业务数据重传时,第一用户设备可以按照预设的 RTT向第二用户设备 重传业务数据。 在第一用户设备接收到授权信息或反馈信息之前, 第二用户设备还可以接收业务 数据, 并根据接收是否正确向网络侧节点发送应答反馈信息; 网络侧节点将应答反馈 信息转发给第一用户设备。 在这种 HARQ传输流程之下, 传输过程相比前两种 D2D HARQ传输方式较为复 杂, 有可能占用第一用户设备较多的 HARQ传输进程, 使得第一用户设备在蜂窝系统 中的 HARQ传输进程受到限制, 因此, 还可以通过对系统反馈时延以及 D2D HARQ 传输进程的配合设置来实现提高系统资源利用率。 例如, 在频分双工系统中, 可以设置第二用户设备从接收到业务数据至向网络侧 节点发送反馈信息的反馈时延不大于 2个子帧时长 (例如, 可以等于 2个子帧的时长 或 2ms),网络侧节点从接收到应答反馈信息至向第一用户设备发送反馈信息的反馈时 延也不大于 2个子帧时长(例如,可以等于 2个子帧的时长或 2ms),此时, D2D HARQ 传输进程预定的 RTT可以为 8个子帧时长 (例如, 可以等于 8ms)。 当然, 也可以设置第二用户设备从接收到业务数据至向网络侧节点发送反馈信息 的反馈时延不大于 4个子帧时长(例如, 可以等于 4个子帧的时长或 4ms), 网络侧节 点从接收到应答反馈信息至向第一用户设备发送反馈信息的反馈时延也不大于 4个子 帧时长(例如, 可以等于 4个子帧的时长或 4ms), 此时, D2D HARQ传输进程的 RTT 可以为 12个子帧时长(例如, 可以等于 12ms)或者 16个子帧时长(例如, 可以等于 16ms)。 此外, 还可以设置第二用户设备从接收到业务数据至向网络侧节点发送反馈信息 的反馈时延不大于 8个子帧时长(例如, 可以等于 8个子帧的时长或 8ms), 网络侧节 点从接收到应答反馈信息至向第一用户设备发送反馈信息的反馈时延不大于 4个子帧 时长(例如, 可以等于 4个子帧的时长或 4ms); 或者反过来, 设置第二用户设备从接 收到业务数据至向网络侧节点发送反馈信息的反馈时延不大于 4个子帧时长 (例如, 可以等于 4个子帧的时长或 4ms),网络侧节点从接收到应答反馈信息至向第一用户设 备发送反馈信息的反馈时延不大于 8个子帧时长 (例如, 可以等于 8个子帧的时长或 8ms)。此时, D2D HARQ传输进程的 RTT可以为 16个子帧时长(例如,可以等于 16ms)。 而在时分双工系统中, 第二用户设备发送应答反馈信息的反馈子帧为第一个满足 间隔大于等于 4的上行子帧, 或者是第二用户设备的第一个满足间隔大于等于 4的设 备到设备通信发送子帧, 此时 D2D HARQ传输进程的 RTT为 20个子帧的时长、 或者 是蜂窝上行链路的连续两个 RTT之和, 其中, 间隔为第一用户设备向第二用户设备发 送业务数据的子帧与第二用户设备发送应答反馈信息的子帧的间隔。 在优选实施方式三的情况下下, 虽然相较上述几种实施方式来讲, 单个 D2D
HARQ传输进程的系统资源的利用率相对较低,但由于 D2D通信是双向传输, 因此可 以将占用的蜂窝通信进程的空闲子帧作为其他 D2D HARQ传输进程,例如用于第二用 户设备向第一用户设备发送业务数据, 从而也可以提高系统资源的利用率。 在本实施例中, 还提供了另一种混合自动重传请求 (HARQ) 传输方法, 应用于 设备到设备通信, 图 4是根据本发明实施例的应用于网络侧的混合自动重传请求传输 方法的流程图, 如图 4所示, 该方法包括如下步骤: 步骤 S402, 网络侧节点接收来自第二用户设备的应答反馈信息, 其中, 该应答反 馈信息表示第二用户设备接收第一用户设备发送业务数据是否正确; 步骤 S404, 在该应答反馈信息表示第二用户设备没有正确接收业务数据的情况 下, 网络侧节点确认第一用户设备需要按照预设的往返时间 RTT向第二用户设备重传 上述业务数据。 通过上述步骤, 网络侧节点能够通过来自第二用户设备的反馈信息, 确认第一用 户设备是否需要按照预设的 RTT向第二用户设备进行重传, 从而在对 D2D HARQ传 输进行控制时,可以不等待第二用户设备的反馈信息就向第一用户设备发送授权信息, 而在收到反馈信息后, 如果反馈信息为 NACK, 则确认发送的授权信息无效, 如果反 馈信息为 ACK, 则确认发送的授权信息有效, 即第一用户设备会按照该授权信息进行 新数据传输。 该方案在流程上保证了不需要等待反馈信息即可向第一用户设备发送授 权信息的可能性,为重传业务数据所用的进程尽可能地与蜂窝系统的 HARQ进程相兼 容提供了可能。 解决了相关技术中不存在基于 D2D通信的 HARQ传输方式的问题, 使得在 D2D通信方式下也可以进行 HARQ传输, 提高了通信系统中传输方式的灵活 性、 可靠性以及兼容性。 作为一种优选实施方式,假设 D2D HARQ传输进程为:第一用户设备根据网络侧 节点发送的授权信息的指示, 向第二用户设备发送业务数据; 第二用户设备根据发送 业务数据的成功与否, 向网络侧节点发送反馈信息; 网络侧节点根据反馈信息, 向第 一用户设备指示重传或发送新业务数据。 在这种情况下, 网络侧节点可以指示第一用 户设备向第二用户设备重传业务数据。 优选地, 在上述进程中, 为了简化流程, 在步骤 S404之前, 网络侧节点可以不等 待第二用户设备发送的应答反馈信息, 向第一用户设备发送用于调度新业务数据传输 的授权信息。 通过这种方式, 如果第一用户设备向第二用户设备传输业务数据完成, 则第一用户设备可以根据该用于调度新业务数据传输的授权信息直接发送新的业务数 据; 而如果第一用户设备向第二用户设备传输业务数据失败, 需要向第二用户设备进 行业务数据重传, 则第一用户设备可以忽略接收到的用于调度新业务数据传输的授权 信息, 而是重传业务数据。在这种情况下, 网络侧节点通过步骤 S404的步骤能够确认 第一用户设备是否需要重传, 如果需要(例如反馈信息为 NACK), 则认为之前发送的 用于调度新业务数据传输的授权信息无效, 可以在以后择机重新进行新业务数据传输 的授权; 如果网络侧节点确认第一用户设备不需要重传 (例如反馈信息为 ACK), 则 认为之前传输的该授权信息已生效。 网络侧节点可以通过多种方式指示第一用户设备向第二用户设备重传业务数据, 优选地, 网络侧节点可以通过以下信息至少之一进行指示: HARQ指示信息、 授权信 息。 如果是 HARQ指示信息, 网络侧节点可以将应答反馈信息包含在该指示信息中发 给第一用户设备; 如果是授权信息, 网络侧节点可以设置该授权信息用于指示第一用 户设备重传业务数据。 在本实施例中提供了一种混合自动重传请求 (HARQ) 传输装置, 应用于设备到 设备通信的第一用户设备中, 该装置用于实现上述实施例及优选实施方式, 已经进行 过说明的不再赘述。 如以下所使用的, 术语"模块"可以实现预定功能的软件和 /或硬件 的组合。 尽管以下实施例所描述的装置较佳地以软件来实现, 但是硬件, 或者软件和 硬件的组合的实现也是可能并被构想的。 图 5是根据本发明实施例的混合自动重传请求 HARQ传输装置的结构框图,如图 5所示, 该装置包括发送模块 52、 检测模块 54和重传模块 56。 下面对该装置进行说 明。 发送模块 52, 设置为向第二用户设备发送业务数据; 检测模块 54, 连接至发送模 块 52, 设置为检测应答反馈信息和 /或授权信息, 其中, 该反馈信息用于表示第二用户 设备接收业务数据是否正确; 重传控制模块 56, 连接至检测模块 54, 设置为当应答反 馈信息表示第二用户设备没有正确接收业务数据和 /或当判断授权信息用于调度第一 用户设备进行业务数据重传时,指示发送模块 52按照预设的 HARQ进程往返时间 RTT 向第二用户设备重传业务数据。 优选地, 图 6是根据本发明实施例的混合自动重传请求 (HARQ) 传输装置中重 传模块 56的优选结构框图一, 如图 6所示, 检测模块 54还可以设置为检测第二用户 设备发送的应答反馈信息, 该重传模块 56还可以包括, 第一重传控制模块 62, 连接 至该检测模块 54, 设置为在应答反馈信息表示第二用户设备没有正确接收业务数据的 情况下, 指示发送模块 52按照预设的 RTT向第二用户设备重传业务数据。 图 Ί是根据本发明实施例的混合自动重传请求 (HARQ) 传输装置中重传模块 56 的优选结构框图二, 如图 7所示,检测模块 54还可以设置为检测第二用户设备发送的 应答反馈信息, 该重传模块 56可以包括判断模块 72和第二重传控制模块 74, 该判断 模块 72, 设置为判断半持续调度的 HARQ进程是否被释放; 第二重传控制模块 74, 连接至该判断模块 72, 用于在应答反馈信息表示第二用户设备没有正确接收业务数 据, 以及半持续调度 HARQ进程没有被释放的情况下, 指示发送模块 52按照预设的 RTT向第二用户设备重传业务数据。 优选地,检测模块 54还可以设置为检测第二用户设备或网络侧节点发送的应答反 馈信息,重传模块 56还可以设置为在该应答反馈信息表示第二用户设备没有正确接收 业务数据时,指示发送模块 52按照预设的 RTT向第二用户设备重传业务数据;和 /或, 检测模块还可以设置为检测网络侧节点发送的授权信息,重传模块 56还可以设置 为在该授权信息用于调度第一用户设备进行业务数据重传时,指示发送模块 52按照预 设的 RTT向第二用户设备重传业务数据。 在本实施例中还提供了一种混合自动重传请求 (HARQ ) 传输装置, 该装置应用 于设备到设备通信的网络侧节点中, 图 8 是根据本发明实施例的混合自动重传请求 (HARQ) 传输装置的另一结构框图, 如图 8所示, 该装置包括接收模块 82, 设置为 接收来自第二用户设备的反馈信息, 其中, 该反馈信息反馈该第二用户设备接收第一 用户设备发送业务数据是否正确; 确认模块 84, 连接至该接收模块 82, 设置为在应答 反馈信息表示第二用户设备没有正确接收业务数据的情况下, 确认第一用户设备需要 按照预设的往返时间 RTT向第二用户设备重传业务数据。 图 9是根据本发明实施例的混合自动重传请求 (HARQ) 传输装置的优选结构框 图一, 如图 9所示, 该装置包括图 8中的所有模块外, 还包括第三重传控制模块 92, 与确认模块 84相连, 设置为在该确认模块 84确认应答反馈信息表示第二用户设备没 有正确接收业务数据的情况下需要按照预设的 RTT 向第二用户设备重传业务数据之 后, 指示第一用户设备向第二用户设备重传业务数据。 图 21是根据本发明实施例的混合自动重传请求(HARQ)传输装置的优选结构框 图二, 如图 21所示, 该装置还可以包括第二发送模块 94, 与接收模块 82相连, 设置 为向第一用户设备转发应答反馈信息, 和 /或在判断第二用户设备没有正确接收业务数 据时向第一用户设备发送授权信息, 授权信息用于调度第一用户设备重传业务数据。 图 22是根据本发明实施例的混合自动重传请求(HARQ)传输装置的优选结构框 图三, 如图 22所示, 该装置还可以包括第三发送模块 96, 与接收模块 82相连, 设置 为不等待第二用户设备发送的应答反馈信息, 向第一用户设备发送用于调度新业务数 据传输的授权信息。 在本实施例中还提供了一种混合自动重传请求(HARQ)传输系统, 图 23是根据 本发明实施例的混合自动重传请求传输系统的结构框图, 如图 23 所示, 该系统包括 D2D传输中位于第一用户设备的 HARQ传输装置(在图 23中以图 5为例示出),还包 括 D2D传输中位于网络侧节点的 HARQ传输装置 (在图 23中以图 8为例示出)。 下面结合优选实施例进行说明, 下述优选实施例结合了上述实施例及其优选实施 方式。 在下述的优选实施例中, 提供了设备到设备通信的 HARQ传输方法和装置, 尤其 涉及蜂窝通信和设备到设备通信共存的无线通信系统中的设备到设备通信的混合自动 重传请求 (HARQ) 传输方法和装置。 下面主要以使用蜂窝通信系统中上行资源进行 D2D通信的场景, 对 D2D通信使用同步 HARQ传输方式为例进行说明, 提供了以下 三种基于 D2D通信的同步 HARQ实现方式, 但是并不限于这三种实现方式。 方式 1 : 设备到设备通信的混合自动重传请求 (HARQ) 传输方法可以包括: 第一用户设 备根据授权信息的指示, 向第二用户设备发送业务数据; 第二用户设备接收该业务数 据, 并根据接收是否正确发送肯定应答 (ACK) 或否定应答 (NACK) 的反馈信息; 如果上述反馈信息是 NACK, 第一用户设备在预设的时间向第二用户设备重传输上述 业务数据。 优选地, 网络侧节点可以不等待上述反馈信息到达, 向第一用户设备发送授权信 息以触发第一用户设备进行新业务数据的传输。 优选地, 第一用户设备检测第二用户设备发送的上述应答反馈信息; 第一用户设 备检测用于调度新业务数据传输的授权信息; 如果反馈信息是 NACK, 第一用户设备 忽略该新业务数据的授权信息, 在预设时间向第二用户设备重传业务数据; 如果反馈 信息是 ACK, 并且第一用户设备检测到了用于调度新业务数据传输的授权信息, 则第 一用户设备按照上述授权信息的指示, 发送新业务数据。 方式 2: 设备到设备通信的混合自动重传请求 (HARQ) 传输方法可以包括: 第一用户设 备根据授权信息的指示, 向第二用户设备发送业务数据; 上述第二用户设备接收上述 业务数据, 并根据接收是否正确发送 ACK或 NACK的反馈信息; 如果上述反馈信息 是 NACK, 第一用户设备在预设的时间向第二用户设备重传输上述业务数据。 优选地, 上述第一用户设备检测上述第二用户设备发送的上述反馈信息; 如果上 述反馈信息是 NACK, 上述第一用户在预设时间向第二用户设备重发上述业务数据; 如果上述反馈信息是 ACK, 并且判断半持续的调度没有被释放时, 上述第一用户设备 发送新业务数据。 方式 3: 设备到设备通信的混合自动重传请求 (HARQ) 传输方法可以包括: 第一用户设 备根据授权信息的指示, 向第二用户设备发送业务数据; 上述第二用户设备接收上述 业务数据, 并根据接收是否正确向网络侧节点发送 ACK或 NACK的反馈信息; 如果 上述反馈信息是 NACK, 第一用户设备在预设的时间向第二用户设备重传输上述业务 数据。 优选地, 如果上述反馈信息是 NACK, 网络侧节点可以向第一用户设备发送授权 信息和 /或 HARQ指示信息, 触发上述第一用户设备在预设时间向第二用户设备重发 上述业务数据; 或者, 如果上述反馈信息是 NACK, 网络侧节点可以通过该反馈信息 触发上述第一用户设备在预设时间向第二用户设备重发上述业务数据。 在该 HARQ传输方法中, 对于频分双工 FDD系统, 当反馈时延是 2或 4毫秒, 上述 D2D HARQ的往返时间(Round Trip Time, 简称为 RTT)可以与蜂窝上行链路的 RTT相同, 即为 8子帧间隔; 或者, 当反馈时延是 4毫秒, 上述 D2D HARQ的 RTT 可以是 12或 16毫秒; 或者, 当反馈时延是 8毫秒, 上述 D2D HARQ的 RTT可以是 16毫秒。 而在时分双工 TDD系统中, 反馈时延可以根据 D2D子帧分配确定。 优选的, 反 馈子帧可以为上述第二用户设备的第一个满足间隔大于等于 4的 D2D发送子帧,其中, 该间隔是指上述业务数据传输子帧与上述第二用户设备的 D2D发送子帧的间隔;在这 种情况下, 上述 D2D HARQ的 RTT可以是 10或 20毫秒; 或者, 上述 D2D HARQ的 RTT可以与蜂窝上行链路的 RTT相同, 或者是蜂窝上行链路的连续两个 RTT之和。 综上, 通过上述的无线通信方法和装置, 解决了蜂窝通信系统中 D2D 通信的 HARQ传输问题, 并且可以有效避免蜂窝通信的 HARQ进程和 D2D通信 HARQ进程 产生干扰, 保证了蜂窝系统中的设备到设备通信的效率和可靠性。 下面结合优选实施例进行说明。 为了解决上述问题,在本实施例中提供了一种用于设备到设备通信的 HARQ传输 装置。 该装置应用于设备到设备通信环境的用户设备中, 该装置包括: 检测模块, 设 置为于检测授权信息和 /或反馈信息; 确定模块; 设置为根据预设的时间确定业务数据 的传输和 /或重传的时间位置; 发送模块: 设置为根据检测模块的指示, 在确定模块确 定的时间位置发送或者重发设备到设备通信的业务数据。 较优地, 该装置还包括: 重传控制模块, 设置为根据检测模块的检测结果确定数 据传输行为。 数据传输行为包括: 当检测到反馈信息是 NACK时, 忽略该授权信息, 并指示该发送模块重发设备到设备通信的业务数据; 当检测到反馈信息是 ACK 时, 指示该发送模块按照该授权信息的指示发送设备到设备通信新业务数据。 或者, 数据传输行为包括: 当检测到反馈信息是 NACK时, 指示发送模块在确定 模块确定的时间位置重发该业务数据; 当检测到反馈信息是 ACK, 并且判断该 HARQ 传输进程没有被释放时, 发送设备到设备通信新业务数据。 或者, 数据传输行为包括: 当检测到授权信息时, 按照该授权信息的指示发送或 者重发设备到设备通信的业务数据; 或者, 检测到的 HARQ指示是 NACK时, 指示 该发送模块在确定模块确定的时间位置重发该设备到设备通信业务数据。 需要说明的是, 设备到设备通信的 HARQ传输所处的系统不同, 具体操作时所采 用的反馈时延存在差别, 例如, 在 FDD系统中, 反馈时延是 2或 4毫秒, HARQ的往 返时间 (Round Trip Time, RTT) 与蜂窝上行链路的 RTT相同; 或者, 反馈时延是 4 又例如, 在 TDD系统中, 反馈时延根据 D2D子帧分配确定, 优选的, 反馈子帧 为第二用户设备接收到该业务数据后的第一个满足间隔大于等于 4的 D2D发送子帧, 该间隔是指该业务数据传输子帧与该第二用户设备的 D2D发送子帧的间隔; HARQ的 RTT是 10或 20毫秒; 或者, HARQ的 RTT与蜂窝上行链路的 RTT相同, 或者是蜂 窝上行链路的连续两个 RTT之和。 其中, 该 RTT是指一个 HARQ进程中数据分组的 前一次传输与下一次传输的时间间隔。
在本实施中还提供了一种用于设备到设备通信 HARQ传输的控制装置。该装置应 用于设备到设备通信环境的网络侧节点中, 该装置包括: 发送模块, 设置为向第一用 户设备发送授权信息和 /或 HARQ指示; 以及以下模块的至少之一: 决策模块一(与上述第一重传控制模块的功能相当): 包括检测子模块, 设置为检 测来自于第二用户设备的 ACK或 NACK反馈信息; 决策子模块, 设置为不等待该检 测子模块的检测结果, 指示该发送模块向该第一用户设备发送授权信息以触发该第一 用户设备进行新数据传输; 识别子模块, 设置为识别第一用户设备的数据传输行为, 该识别的方式为: 当该检测子模块检测到该反馈信息是 NACK时, 则识别该通信行为 为该第一用户设备忽略该新数据传输的授权信息传输, 向该第二用户设备重传设备到 设备通信业务数据, 当该检测子模块检测到该反馈信息是 ACK, 则识别该通信行为为 该第一用户设备按照该授权信息的指示传输设备到设备通信的新业务数据。 决策模块二(与第二重传控制模块的功能相当): 包括半持续调度授权模块, 设置 为初始化或重新初始化半持续调度时发送授权信息, 该授权信息用于调度第一用户设 备向第二用户设备发送业务数据; 半持续调度控制模块, 设置为接收该第一用户设备 和 /或第二用户设备发送的半持续调度释放请求, 并释放该半持续调度的 HARQ进程。 决策模块三(与第三重传控制模块的功能相当): 包括检测子模块, 设置为检测来 自于第二用户设备的 ACK或 NACK反馈信息; 决策子模块, 设置为至少根据该检测 子模块的检测结果确定, 指示该发送模块向第一用户设备发送授权信息和 /或 HARQ 指示, 该 HARQ指示根据该检测模块检测到的反馈信息生成, 该授权信息用于根据该 检测模块检测到的反馈信息指示该第一用户设备进行数据重传或新数据传输。 需要说明的是, 在上述实施例及优选实施例中所提供的用于设备到设备通信 HARQ传输的控制装置应用于 FDD系统时, 反馈时延是 2或 4毫秒, HARQ的 RTT 与蜂窝上行链路的 RTT相同; 或者, 反馈时延是 4毫秒, HARQ的 RTT是 12或 16 毫秒; 或者, 反馈时延是 8毫秒, HARQ的 RTT是 16毫秒。 而上述设备到设备通信 HARQ传输的控制装置应用于 TDD系统中时, 反馈时延 根据 D2D子帧分配确定, 优选的, 反馈子帧为第二用户设备接收到该业务数据后的第 一个满足间隔大于等于 4的 D2D发送子帧,该间隔是指该业务数据传输子帧与该第二 用户设备的 D2D发送子帧的间隔; HARQ的 RTT是 10或 20毫秒; 或者, HARQ的 RTT与蜂窝上行链路的 RTT相同, 或者是蜂窝上行链路的连续两个 RTT之和。 在本实施例中提供了一种设备到设备通信的 HARQ传输方法, 该方法包括: 第一 用户设备根据授权信息的指示, 向第二用户设备发送业务数据; 第二用户设备接收所 述业务数据,并根据接收是否正确发送肯定应答 ACK或否定应答 NACK的反馈信息; 如果所述反馈信息是 NACK, 第一用户设备在预设的时间向第二用户设备重传输所述 业务数据。 优选地, 不等待所述反馈信息到达, 向第一用户设备发送授权信息以触发所述第 一用户设备进行新数据传输。 第一用户设备检测所述第二用户设备发送的反馈信息; 第一用户设备检测所述新数据传输的授权信息; 如果反馈信息是 NACK, 第一用户设 备忽略该授权信息, 在预设时间向第二用户设备重发所述业务数据; 如果反馈信息是 ACK, 并且检测到新数据传输的授权信息, 第一用户设备按照所述授权信息的指示, 发送新业务数据。 或者, 第一用户设备检测第二用户设备发送的反馈信息; 如果该反馈信息是 NACK, 第一用户在预设时间向第二用户设备重发所述业务数据; 如果该反馈信息是 ACK, 并且判断半持续的调度没有被释放时, 第一用户设备发送新业务数据。 或者, 如果反馈信息是 NACK, 向第一用户设备发送授权信息和 /或 HARQ指示 信息, 触发第一用户设备在预设时间向第二用户设备重发所述业务数据; 或者通过该 反馈信息触发第一用户设备在预设时间向第二用户设备重发业务数据。 同样, 在 FDD系统中, 反馈时延是 2或 4毫秒, HARQ的 RTT与蜂窝上行链路 的 RTT相同; 或者, 反馈时延是 4毫秒, HARQ的 RTT是 12或 16毫秒; 或者, 反 馈时延是 8毫秒, HARQ的 RTT是 16毫秒。 在 TDD系统中, 反馈时延根据 D2D子帧分配确定, 优选的, 反馈子帧为第二用 户设备接收到所述业务数据后的第一个满足间隔大于等于 4的 D2D发送子帧,该间隔 是指所述业务数据传输子帧与所述第二用户设备的 D2D发送子帧的间隔; HARQ 的 RTT是 10或 20毫秒; 或者, HARQ的 RTT与蜂窝上行链路的 RTT相同, 或者是蜂 窝上行链路的连续两个 RTT之和。 以下, 在各个优选的实施方式中, 以 3GPP (3rd Generation Partnership Project)长 期演进 (Long Term Evolution, 简称为 LTE) /LTE-A (LTE-Advanced) 系统为背景对 本公开方案进行详细介绍, 但是并不构成对本方案不当的限定。
LTE/LTE-A 系统下行链路以正交频分复用接入 (Orthogonal Frequency Division Multiplexing Access,简称为 OFDMA)技术为基础,上行链路则采用 SC-FDMA ( Single carrier-Frequency Division Multiplexing Access) 多址方式。 在 OFDMA/SC-FDMA系统 中, 通信资源是时-频两维的形式。 例如, 对于 LTE/LTE-A系统而言, 上行链路和下 行链路的通信资源在时间方向上都是以无线帧 (radio frame, 简称帧) 为单位划分的, 每个帧的长度为 10 ms, 包含 10个长度为 1 ms的子帧 (sub-frame), 每个子帧又包含 两个长度为 0.5ms的时隙 (slot)。 根据循环前缀 (Cyclic Prefix, 简称 CP) 长度的不 同, 每个时隙包括 7个或者 6个 OFDM或 SC-FDM符号, 其中 7和 6分别对应于普 通循环前缀 (Normal CP) 和扩展循环前缀 ( Extended CP )。 如图 10所示。 按照双工方式的不同, LTE/LTE-A系统又分为两个模式:时分双工(Time-Division Duplex, 简称 TDD) 系统和频分双工 (Frequency-Division Duplex, 简称 FDD) 系统。 FDD系统通过两个频带分别用于下行链路(网络侧到终端)和上行链路(终端到网络 侧) 的信号传输, 对应的时频资源分别称为下行子帧和上行子帧; TDD系统使用一个 频带同时用于上下行链路的信号传输, 通过将上行和下行链路的信号传输分配在不同 的子帧中而实现两条链路的复用。 在 LTE/LTE-A版本中, 根据上下行子帧数量的比例 不同, TDD系统支持 7种上下行配置 (Uplink-downlink configuration), 如表 1所示。 表 1 : TDD LTE系统中子帧的上 /下行配置形式表 上下行配置 子帧号
0 1 2 3 4 5 6 7 8 9
0 D S U U U D S U U U
1 D S U U D D S U U D
2 D S U D D D S U D D
3 D S U U U D D D D D
4 D S U U D D D D D D
5 D S U D D D D D D D
6 D S U U U D S U U D 在表 1中, D表示下行子帧, U表示上行子帧, S表示特殊子帧。 S子帧包括一部 分下行符号 (Downlink Pilot Time Slot, 简称为 DwPTS)、 上行符号(Uplink Pilot Time Slot, 简称为 UpPTS) 和上 /下行之间转换的保护间隔 (Guard Period, 简称为 GP)。 在 LTE/LTE-A蜂窝通信系统中, 业务数据在下行共享信道 (DL-SCH, Downlink Shared Channel)和上行共享信道(UL-SCH, Uplink Shared Channel) 中传输, 对应于 物理层的物理下行共享信道(PDSCH, Physical Downlink Shared Channel)和物理上行 共享信道 (PUSCH, Physical Uplink Shared Channel )0 并且, 对于共享信道中的数据 传输来说, 需要相应的授权信息进行指示, 指示的内容包括资源分配位置, 调制编码 方式, 功率控制信息, MIMO (Multi-In Multi-Out)相关的信息等。 在蜂窝通信中, 上 述的授权信息以 DCI (Downlink Control Information) 的形式通过物理下行控制信道 (PDCCH, Physical Downlink Control Channel) 发送。 同时, 在 LTE/LTE-A蜂窝通信中, 支持 HARQ传输。 具体的, 上行链路采用同 步的 HARQ传输方式 (synchronous HARQ), 下行链路采用异步的 HARQ传输方式 ( asynchronous HARQ)0 同步是指, 对于特定的 HARQ进程 (HARQ process) 来说, 重传发生在已知的时刻, 而异步 HARQ则意味着对于特定的 HARQ进程来说, 重传 可以在任何时刻发生。 实施例 1 在本实施例中提供了一种设备到设备通信的 HARQ传输方法, 该方法包括: 第一 用户设备根据授权信息的指示, 向第二用户设备发送业务数据; 第二用户设备接收所 述业务数据,并根据接收是否正确发送肯定应答 ACK或否定应答 NACK的反馈信息; 如果该反馈信息是 NACK, 第一用户设备在预设的时间向第二用户设备重传输所述业 务数据。 在本实施例中, 网络侧不等待反馈信息的到达, 即向第一用户设备发送授权信息 以触发其进行新数据传输。 第一用户设备检测第二用户设备发送的反馈信息以及该新 数据传输的授权信息。 如果反馈信息是 NACK, 则第一用户设备忽略该授权信息, 在 预设时间向第二用户设备重发上述业务数据; 如果反馈信息是 ACK, 并且检测到新数 据传输的授权信息, 第一用户设备按照该新数据传输的授权信息的指示, 发送新业务 数据。 图 11是根据本发明优选实施例的设备到设备通信的 HARQ传输方法的流程图, 如图 11所示, 该流程包括如下步骤: 步骤 S1102, 第一用户设备向第二用户设备发送业务数据; 步骤 S1104, 第二用户设备向第一用户设备以及网络侧节点发送反馈信息; 步骤 S1106, 网络侧节点不等待反馈信息, 向第一用户设备发送授权信息, 需要 说明的是, 该步骤与步骤 S1104不存在严格的先后顺序; 步骤 S1108, 第一用户设备根据反馈信息判断是否进行业务数据重传, 如果是, 执行步骤 S1102, 否则, 执行步骤 S1110; 步骤 S1110, 第一用户设备根据授权信息向第二用户设备发送新的业务数据。 首先以 FDD系统为例进行说明, 假设 UE使用上行子帧进行 D2D通信。 图 12是 根据本发明实施例在 FDD系统中使用上行子帧进行 D2D通信的 HARQ传输的示意图 一, 如图 12所示, 一个小方格代表一个子帧, □表示属于一个 HARQ进程的子帧, 方格中的数字是子帧编号, 在图 12中示出了 4个无线帧。 UE1表示第一用户设备, UE2表示第二用户设备, NN表示对 D2D通信进行控制的网络侧节点(Network Node), 例如可以是 eNB。 在本实施例中, 当 UE1判断需要在无线帧 4n的子帧 8向 D2D通信对端用户 UE2 发送业务数据时 (例如, 可以通过 eNB在无线帧 4η的子帧 4发送授权信息调度 UE1 进行业务数据的发送, 或者 UE1被触发进行 D2D业务数据的重传), 在子帧 8发送业 务数据, UE2 接收该业务数据, 并根据接收是否正确, 反馈相应的应答信息 ACK/NACK。 UE1在子帧 8发送业务数据后, 则在该子帧后的第 4个子帧检测相应的 反馈信息。 同时, 当判断到 UE1的数据还未发送完时, 在发送业务数据后的第 4个子 帧即无线帧 4n+l的子帧 2, 网络节点不等待 UE2反馈信息的到达, 即向 UE1发送授 权信息, 调度 UE1在后续的第 4个子帧发送新业务数据。 对于 UE1来说, 如果检测到 ACK, 则 UE1认为业务数据传输成功, 并检测是否 有调度其进行新业务数据传输的授权信息; 如果检测到 NACK, 则 UE1在该反馈信息 后的第 4个子帧, 即无线帧 4n+l的子帧 6重发所述业务数据,并忽略网络节点在无线 帧 4n+l的子帧 2发送的授权信息。 所述忽略授权信息是指, 如果 UE1检测到反馈信 息是 NACK, 不会再进行授权信息的检测; 或者, 即使检测到授权信息, UE1也不会 按照授权信息的指示进行新数据的传输。 对于控制 D2D通信的网络节点来说, 也会检测 UE2反馈的应答信息。 由于网络 节点不等待 UE2反馈信息的到达即向 UE1发送授权信息, 因此网络节点检测到 UE2 反馈的应答信息时, 授权信息已经发出。 如果网络节点检测到的应答信息是 ACK, 则 认为 UE1向 UE2传输的业务数据成功,并且认为 UE1会在无线帧 4n+l的子帧 6按照 在无线帧 4n+l的子帧 2检测到的授权信息发送新业务数据;否则,网络节点认为 UE1 会在无线帧 4n+l的子帧 6重发业务数据, 并在后续的发送时机中向 UE1重发所述调 度授权信息, 调度其进行新业务传输。 下面以 TDD系统为例进行说明, 图 13是根据本发明实施例在 TDD系统中的上 下行配置 1下使用上行子帧进行 D2D通信的 HARQ传输的示意图一, 如图 13所示, 在 TDD上下行配置 1下, 假设 UE使用上行子帧进行 D2D通信 HARQ传输。在图 13 中, D、 S和 U分别表示蜂窝通信的下行子帧、 特殊子帧和上行子帧, 其余各缩写和 符号的含义与上述图 12相同。 HARQ传输流程以及用户设备侧、网络侧的处理过程也 基本相同, 不再赘述。 以 TDD系统为例, 图 14是根据本发明实施例在 TDD系统中的上下行配置 6下 使用上行子帧进行 D2D通信的 HARQ传输的示意图一, 如图 14所示, 在 TDD上下 行配置 6下, 假设 UE使用上行子帧进行 D2D通信 HARQ传输。 在图 14中, D、 S 和 U分别表示蜂窝通信的下行子帧、 特殊子帧和上行子帧, 其余各缩写和符号的含义 与上述图 12的相同。 HARQ传输流程以及用户设备侧、网络侧的处理过程也基本相同, 不再赘述。 较优地, 可以设置 UE进行 D2D通信时的最大重传次数。 例如, 当 UE1检测到 UE2反馈的应答信息是 NACK时, 判断前次传输是否已经达到最大重传次数; 如果达 到最大重传次数, 则 UE1不再进行该业务数据的 HARQ重传, 并在检测到调度其进 行新业务数据传输的授权信息后, 按照该授权信息发送新业务数据。 同样, 当设置 UE进行 D2D通信时的最大重传次数时, 控制 D2D通信的网络节 点也会进行重传次数的判断, 即当检测到 NACK时, 判断前次传输是否已经达到最大 重传次数; 如果达到最大重传次数, 则认为 UE1不再进行该业务数据的 HARQ重传, 而是会按照该新业务数据授权信息的指示发送新业务数据。 在本实施例中, UE2同时向 UE1和网络节点发送反馈应答信息。该反馈应答信息 可以只发送一次, UE1和网络节点都去检测, 例如通过 PUCCH资源发送, 或者通过 在 UE2发送的 D2D业务信道中复用反馈信息进行发送, 复用的方式可以参考蜂窝通 信时 ACK/NACK在 PUSCH资源中复用的方法; 也可以分别发送, 例如通过 PUCCH 资源向网络节点发送该反馈应答信息, 通过 D2D通信资源向 UE1发送该反馈应答信 息。 在本实施例中, 在 FDD系统中, 反馈应答信息发送的时序可以采用 "+4"的原则, 即用户设备在子帧 k接收到 D2D业务数据后, 在子帧 k+4发送相应的反馈应答信息; 在 TDD系统中, 反馈应答信息发送的时序通过结合接收端处理时延以及 D2D通信双 方 UE的 D2D进程或 D2D子帧配置确定, 例如, 用户设备在子帧 k接收到 D2D业务 数据后, 在该用户设备的第一个满足 m≥4的 D2D发送子帧发送该反馈应答信息。 例 如, 图 13所示的无线帧 4n+l的子帧 3可以是 UE2的 D2D发送子帧, UE2在该子帧 3发送反馈应答信息; 图 14所示的无线帧 4n+l的子帧 3可以是 UE2的 D2D发送子 帧, UE2在该子帧 3发送反馈应答信息。 在本实施例中, D2D业务数据传输的授权时序可以沿用蜂窝上行链路通信的原则, 即 FDD系统中采用" +4"的原则, TDD系统中根据不同的上下行配置分别有定义, 可 参考相关协议, 不再赘述。 在本实施例中, 保证了 D2D通信的 HARQ进程与蜂窝通信相同, 即在 FDD系统 中, HARQ传输时 RTT是 8ms, 在 TDD系统中则与具体的上下行配置有关, 例如上 述的 TDD上下行配置 1下, D2D通信 HARQ传输时的 RTT是 10ms。 这样在蜂窝通 信系统中引入 D2D通信可以将 D2D通信所带来的影响降到最低。 实施例 2 在本实施例中提供了一种设备到设备通信的 HARQ传输方法以解决上述问题,包 括: 第一用户设备根据授权信息的指示, 向第二用户设备发送业务数据; 第二用户设 备接收上述业务数据, 并根据接收是否正确发送肯定应答 ACK或否定应答 NACK的 反馈信息; 如果该反馈信息是 NACK, 第一用户设备在预设的时间向第二用户设备重 传输上述业务数据。 在本施例中, 第一用户设备检测第二用户设备发送的应答反馈信息; 如果该反馈 信息是 NACK, 则第一用户在预设时间向第二用户设备重发所述业务数据; 如果该反 馈信息是 ACK, 并且第一用户设备在判断半持续的调度没有被释放时, 发送新业务数 据。 也即本例中的设备到设备通信采用半持续调度 (Semi-Persistent Scheduling, 简称 为 SPS) 的方式。 以 FDD系统为例,图 15是根据本发明实施例在 FDD系统使用上行子帧进行 D2D 通信的 HARQ传输的示意图二, 如图 15所示, 假设 UE使用上行子帧进行 D2D通信 HARQ传输。 图中各符号与缩写的含义与图 12相同。 在该实施例中, 当 UE1判断需要在无线帧 4n的子帧 8向 D2D通信对端用户 UE2 发送业务数据时 (例如可以通过 eNB在无线帧 4η的子帧 4发送授权信息初始化或者 重新初始化半持续调度的 HARQ传输, 或者 UE1判断该半持续调度的 HARQ进程还 未被释放), 在子帧 8发送业务数据, UE2接收该业务数据, 并根据接收是否正确, 反 馈相应的应答信息 ACK/NACK。 UE1在子帧 8发送业务数据后, 则在该子帧后的第 4 个子帧检测相应的反馈信息。 对于 UE1来说, 如果检测到 ACK, 则 UE1认为业务数据传输成功, 并且判断该 半持续调度的进程没有被释放时,继续发送新业务数据(图 15无线帧 4n+l的子帧 6); 如果检测到 NACK, 则 UE1在该反馈信息后的第 4个子帧, 即无线帧 4n+l的子帧 6 重发所述业务数据。 较优地, 可以设置 UE进行 D2D通信时的最大重传次数。 例如, 当 UE1检测到 UE2反馈的应答信息是 NACK时, 判断前次传输是否已经达到最大重传次数; 如果达 到最大重传次数, 则 UE1不再进行该数据包的 HARQ重传。 对于控制 D2D通信的网络节点来说, 在对半持续调度的传输进行调度后, 需要判 断该半持续调度的 HARQ进程是否该被释放。判断的依据可以是 UE1和 /或 UE2发送 释放请求。 例如, UE1判断业务数据已经发送完成后, 向网络节点发送释放请求; 或 者, UE2判断业务数据已经发送完成后, 向网络节点发送释放请求, UE2判断的依据 可以是 UE1连续发送若干个空数据包。 在本实施例中, UE2向 UE1发送的反馈应答信息, 可以通过 PUCCH资源发送, 或者通过在 UE2发送的 D2D业务信道中复用反馈信息进行发送, 复用的方式可以参 考蜂窝通信时 ACK/NACK在 PUSCH资源中复用的方法。 在本实施例中, 在 FDD系统中, 反馈应答信息发送的时序可以采用 "+4"的原则, 即用户设备在子帧 k接收到 D2D业务数据后, 在子帧 k+4发送相应的反馈应答信息; 在 TDD系统中, 反馈应答信息发送的时序通过结合接收端处理时延以及 D2D通信双 方 UE的 D2D进程或 D2D子帧配置确定, 例如, 用户设备在子帧 k接收到 D2D业务 数据后, 在该用户设备的第一个满足 m≥4的 D2D发送子帧发送该反馈应答信息。 在本实施例中, D2D业务数据传输的授权时序可以沿用蜂窝上行链路通信的授权 传输时序, 即 FDD系统中采用" +4"的原则, TDD系统中根据不同的上下行配置分别 有定义, 可参考相关协议, 不再赘述。 在本实施例中, 保证了 D2D通信的 HARQ进程与蜂窝通信相同, 即在 FDD系统 中, HARQ传输时 RTT是 8ms, 在 TDD系统中则与具体的上下行配置有关, 例如上 述的 TDD上下行配置 1下, D2D通信 HARQ传输时 RTT是 10ms。 这样在蜂窝通信 系统中引入 D2D通信可以将 D2D通信所带来的影响降到最低。 实施例 3 在本实施例中提供了一种设备到设备通信的 HARQ传输方法, 该方法包括: 第一 用户设备根据授权信息的指示, 向第二用户设备发送业务数据; 所述第二用户设备接 收所述业务数据, 并根据接收是否正确发送肯定应答 ACK或否定应答 NACK的反馈 信息; 如果所述反馈信息是 NACK, 第一用户设备在预设的时间向第二用户设备重传 输所述业务数据。 在本实施例中, 如果反馈信息是 NACK, 则向第一用户设备发送授权信息和 /或 HARQ指示信息, 触发所述第一用户设备在预设时间向第二用户设备重发所述业务数 据。 以 LTE/LTE-A系统中的 D2D通信为例, HARQ传输的流程可以是: D2D通信控 制节点调度第一用户设备向第二用户设备传输业务数据; 第一用户设备向第二用户设 备传输业务数据; 第二用户设备接收业务数据, 并根据检测是否正确反馈相应的应答 消息; D2D通信控制节点检测应答消息,如果是 ACK,则认为此次业务数据传输成功; 如果是 NACK, 则触发第一用户设备在预设的时间向第二用户设备重发该业务数据。 D2D通信控制节点可以是网络侧节点, 例如 eNB。 触发第一用户设备重发的信令可以 是 D2D通信控制节点发送的授权信息, 也可以是 HARQ指示 (HARQ Indicator, HI) 信息。 实施例 3子例 1 : 以 FDD系统为例, 图 16是根据本发明实施例在 FDD系统中使用上行子帧进行 D2D通信的 HARQ传输的示意图三, 如图 16所示, 假设 UE使用上行子帧进行 D2D 通信 HARQ传输。 图中各缩写和符号的含义与实例 1相同。 较优地, 在本实施例中, 业务数据的应答反馈时延无法按照 LTE蜂窝通信的反馈 时延进行反馈, 可以对该反馈时延重新设置, 例如设置为反馈时延为 2ms。 而授权传 输时延则可沿用蜂窝通信的规则, 即 4ms。 在本实施例中, 保证了 D2D通信的 HARQ进程与蜂窝通信相同, 即在 FDD系统 中, HARQ传输时 RTT是 8ms。 这样在蜂窝通信系统中引入 D2D通信可以将 D2D通 信所带来的影响降到最低。(不过,对于用户设备和网络节点的实现可能带来较大的挑 战: 现有系统中的反馈时延和重传调度时延最小都是 4ms, 降低这些时延在系统实现 上影响较大。) 实施例 3子例 2: 在本实施例的 HARQ流程下, 可以考虑另外一种 HARQ时序下的 HARQ传输方 法。 以 FDD系统为例,图 17是根据本发明实施例在 FDD系统中另外一种使用上行子 帧进行 D2D通信的 HARQ传输的示意图三, 如图 17所示, 假设 UE使用上行子帧进 行 D2D通信 HARQ传输。 图中□表示属于一个蜂窝网 HARQ进程的子帧, 其与各缩 写和符号的含义与实例 1相同。 较优地, 在本实例中, 业务数据的应答反馈时延可以沿用 LTE蜂窝通信的反馈时 延规则, 即 FDD系统中反馈时延采用 "+4"的原则, 即反馈时延为 4ms。 授权传输时序 也可沿用蜂窝通信的规则, 即 FDD系统中同样为 "+4"原则。 如图 17所示。 在本实施例中, D2D通信的 HARQ进程与蜂窝通信不同, 例如, 在图 17的例子 中, HARQ传输时 RTT是 12ms, 而 FDD蜂窝系统中 HARQ传输时 RTT是 8ms。 这 样一个 D2D HARQ进程的传输会占用两个蜂窝通信的 HARQ进程。 不过, 由于 D2D 通信可能是双向通信, 即通信双方用户设备都会向对方用户设备发送业务数据, 因而 可以把上述两个蜂窝 HARQ进程的子帧按照 D2D HARQ进程分别分配给 D2D的两个 链路。 例如, 在图 17中, 被 D2D通信占用的两个蜂窝 HARQ进程, 可以组成 3个 D2D HARQ进程: 无线帧 4n的子帧 8、无线帧 4n+2的子帧 0和无线帧 4n+3的子帧 2 属于一个 HARQ进程; 无线帧 4n的子帧 4, 无线帧 4n+l的子帧 6和无线帧 4n+2的 子帧 8属于一个 HARQ进程;无线帧 4n的子帧 0,无线帧 4n+l的子帧 2、无线帧 4n+2 的子帧 4和无线帧 4n+3的子帧 6属于一个 HARQ进程。比如第一个 D2D HARQ进程 用于 UE1向 UE2传输, 第二个 D2D HARQ进程用于 UE2向 UE1传输, 等等, 不再 赘述。 实施例 3子例 3: 在本实施例 HARQ流程下,可以考虑另外一种 HARQ时序下的 HARQ传输方法。 以 FDD系统为例,图 18是根据本发明实施例在 FDD系统中又一种使用上行子帧 进行 D2D通信的 HARQ传输的示意图三, 如图 18所示, 假设 UE使用上行子帧进行 D2D通信 HARQ传输。 图中各缩写和符号的含义与实例 1相同。 以 TDD系统为例, 图 19是根据本发明实施例在 TDD系统中在上下行配置 3下 使用上行子帧进行 D2D通信的 HARQ传输的示意图三, 如图 19所示, 假设 UE使用 上行子帧进行 D2D通信。 TDD上下行配置 3下的 HARQ传输。 图中各缩写和符号的 含义与实例 1相同。 图 20是根据本发明实施例在 TDD系统中在上下行配置 6下使用上行子帧进行 D2D通信的 HARQ传输的示意图三, 如图 20所示为 TDD上下行配置 6下的 HARQ 传输。 图中各缩写和符号的含义与实例 1相同。 在本实施例中, D2D通信的 HARQ进程与蜂窝通信不同, 例如, 在图 18的 FDD 系统的例子中, HARQ传输时 RTT是 16ms, 是 FDD蜂窝通信中重传和首传的间隔的 2倍。 这样一个 D2D HARQ进程的传输会占用一个蜂窝通信的 HARQ进程中一半的 子帧。 不过, 由于 D2D通信可能是双向通信, 即通信双方用户设备都会向对方用户设 备发送业务数据, 因而可以把上述一个蜂窝 HARQ进程对应的子帧中的另一半子帧作 为一个 D2D HARQ进程分配给 D2D通信的对端用户设备用于数据传输。 该实施方式 同时适用于 FDD系统与 TDD系统。 较优地, 所述业务数据的应答反馈时延可与蜂窝通信相同。 例如, FDD系统中, 在子帧 k接收到业务数据后, 在子帧 k+4传输相应的应答反馈 ACK/NACK信息, 如 图 18的反馈信息传输。 或者, 所述业务数据的应答反馈时延可由 D2D子帧或进程的配置而确定, 即该反 馈应答信息在所述业务数据的接收端用户设备的 D2D 发送子帧中传输。 例如, 在图 18中, 如果无线帧 4n+l的子帧 6是用于 UE2向 UE1传输的 D2D子帧, 则对于无线 帧 4η的子帧 8中接收到的业务数据, UE2可在无线帧 4η+1的子帧 6中传输相应的反 馈应答信息,传输的方法可以参考蜂窝通信时 ACK/NACK在 PUSCH中复用的传输方 法。 在 FDD系统中, 可总结为: 子帧 k的应答反馈信息, 对应于子帧 k-8的业务数据 接收; 如果在子帧 k检测到 NACK, 和 /或, 在子帧 k+4检测到调度重传的授权信息, 则在子帧 k+8进行业务数据的重传。 在 TDD中的 D2D通信同理, 如图 19和图 20所 示。 较优地, 当所述反馈应答信息在 D2D发送子帧中传输时, 所述业务数据的发送方 用户设备也可检测所述反馈应答信息,即控制 D2D通信的网络节点检测到反馈应答信 息是 NACK并且判断需要重传时, 可以发送授权信息触发 UE1进行业务数据的重传, 也可不发送授权信息, 而是由该反馈应答信息触发 UE1进行重传。 在另外一个实施例中, 还提供了一种软件, 该软件用于执行上述实施例及优选实 施例中描述的技术方案。 在另外一个实施例中, 还提供了一种存储介质, 该存储介质中存储有上述软件, 该存储介质包括但不限于光盘、 软盘、 硬盘、 可擦写存储器等。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多个计算装置所 组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码来实现, 从而, 可以 将它们存储在存储装置中由计算装置来执行, 并且在某些情况下, 可以以不同于此处 的顺序执行所示出或描述的步骤, 或者将它们分别制作成各个集成电路模块, 或者将 它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样, 本发明不限制于任 何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技 术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的 任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种混合自动重传请求 HARQ传输方法, 应用于设备到设备通信, 包括: 第一用户设备向第二用户设备发送业务数据;
所述第一用户设备检测应答反馈信息和 /或授权信息, 其中, 所述反馈信息 用于表示所述第二用户设备接收所述业务数据是否正确;
当所述应答反馈信息表示所述第二用户设备没有正确接收所述业务数据和 /或当判断所述授权信息用于调度所述第一用户设备进行所述业务数据重传时, 所述第一用户设备按照预设的往返时间 RTT 向所述第二用户设备重传所述业 务数据。
2. 根据权利要求 1所述的方法, 其中, 所述第一用户设备向所述第二用户设备发 送所述业务数据包括:
所述第一用户设备检测来自网络侧节点的所述授权信息;
当所述第一用户设备判断所述授权信息用于调度所述第一用户设备发送所 述业务数据时, 所述第一用户设备向所述第二用户设备发送所述业务数据。
3. 根据权利要求 1所述的方法, 其中, 在所述第一用户设备检测所述第二用户设 备发送的所述应答反馈信息的情况下,所述第一用户设备按照预设的 RTT向所 述第二用户设备重传所述业务数据包括,
在所述应答反馈信息表示所述第二用户设备没有正确接收所述业务数据的 情况下,所述第一用户设备按照预设的 RTT向所述第二用户设备重传所述业务 数据。
4. 根据权利要求 1所述的方法, 其中, 在所述第一用户设备检测所述第二用户设 备发送的所述应答反馈信息的情况下,所述第一用户设备按照预设的 RTT向所 述第二用户设备重传所述业务数据包括,
所述第一用户设备判断半持续调度的 HARQ进程是否被释放; 在所述应答反馈信息表示所述第二用户设备没有正确接收所述业务数据, 以及所述半持续调度的 HARQ进程没有被释放的情况下,所述第一用户设备按 照预设的 RTT向所述第二用户设备重传所述业务数据。
5. 根据权利要求 3或 4所述的方法, 其中,
在频分双工 FDD系统中,所述第二用户设备从接收到所述业务数据至向所 述第一用户设备发送所述应答反馈信息的反馈时延不大于 4个子帧的时长, 所 述 HARQ传输的 RTT为 8个子帧的时长; 或所述第二用户设备从接收到所述 业务数据至向所述第一用户设备发送所述应答反馈信息的反馈时延不大于 8个 子帧的时长, 所述 RTT为 16个子帧的时长;
在时分双工 TDD 系统中, 所述第二用户设备发送所述应答反馈信息的反 馈子帧为所述第二用户设备的第一个满足子帧间隔大于等于 4的设备到设备通 信发送子帧,所述 RTT为 10个子帧的时长、或者与蜂窝上行链路的 RTT相同, 其中, 所述子帧间隔为所述第一用户设备向所述第二用户设备发送所述业务数 据的子帧与所述第二用户发送所述应答反馈信息的子帧的间隔。
6. 根据权利要求 4所述的方法, 其中, 还包括: 在判断所述第一用户设备向所述 第二用户设备传输所述业务数据完成时, 所述第一用户设备或所述第二用户设 备向网络侧节点发送释放所述半持续调度的请求。
7. 根据权利要求 1所述的方法, 其中,
在所述第一用户设备检测所述第二用户设备或网络侧节点发送的应答反馈 信息的情况下,所述第一用户设备按照预设的 RTT向所述第二用户设备重传所 述业务数据包括, 在所述应答反馈信息表示所述第二用户设备没有正确接收所 述业务数据,所述第一用户设备按照预设的 RTT向所述第二用户设备重传所述 业务数据; 和 /或,
在所述第一用户设备检测所述网络侧节点发送的所述授权信息的情况下, 所述第一用户设备按照预设的 RTT 向所述第二用户设备重传所述业务数据包 括,在判断所述授权信息用于调度所述第一用户设备进行所述业务数据重传时, 所述第一用户设备按照预设的 RTT向所述第二用户设备重传所述业务数据。
8. 根据权利要求 7所述的方法, 其中,
在所述第一用户设备检测所述第二用户设备或网络侧节点发送的应答反馈 信息的情况下, 在所述第一用户设备检测所述应答反馈信息之前, 还包括, 所 述第二用户设备接收所述业务数据, 并根据接收是否正确向所述网络侧节点发 送所述应答反馈信息, 所述网络侧节点将所述应答反馈信息转发给所述第一用 户设备; 和 /或, 在所述第一用户设备检测所述网络侧节点发送的所述授权信息的情况下, 在所述第一用户设备检测所述授权信息之前, 还包括, 在所述应答反馈信息表 示所述第二用户设备没有正确接收所述业务数据时, 所述网络侧节点向所述第 一用户设备发送用于调度所述第一用户设备进行所述业务数据重传的授权信 息。 根据权利要求 7所述的方法, 其中,
在频分双工 FDD系统中,所述第二用户设备从接收到所述业务数据至向所 述网络侧节点发送所述应答反馈信息的反馈时延不大于 2个子帧的时长, 所述 网络侧节点从接收到所述应答反馈信息至向所述第一用户设备发送所述应答反 馈信息和 /或授权信息的反馈时延不大于 2个子帧的时长, 所述 RTT为 8个子 帧的时长; 或所述第二用户设备从接收到所述业务数据至向所述网络侧节点发 送所述应答反馈信息的反馈时延不大于 4个子帧的时长, 所述网络侧节点从接 收到所述应答反馈信息至向所述第一用户设备转发所述应答反馈信息或发送所 述授权信息的反馈时延不大于 4个子帧的时长, 所述 RTT为 12个子帧的时长 或 16个子帧的时长;或所述第二用户设备从接收到所述业务数据至发送所述应 答反馈信息的反馈时延不大于 8个子帧的时长, 所述网络侧节点从接收到所述 应答反馈信息至向所述第一用户设备转发所述应答反馈信息或发送所述授权信 息的反馈时延不大于 4个子帧的时长, 所述 RTT为 16个子帧的时长;
在时分双工 TDD 系统中, 所述第二用户设备发送所述应答反馈信息的反 馈子帧为第一个满足间隔大于等于 4的上行子帧或所述第二用户设备的第一个 满足子帧间隔大于等于 4的设备到设备通信发送子帧, 所述 RTT为 20个子帧 的时长、 或者是蜂窝上行链路的连续两个 RTT之和, 其中, 所述子帧间隔为所 述第一用户设备向所述第二用户设备发送所述业务数据的子帧与所述第二用户 发送所述应答反馈信息的子帧的间隔。 一种混合自动重传请求 HARQ传输方法, 应用于设备到设备通信, 包括: 网络侧节点接收来自第二用户设备的应答反馈信息, 其中, 所述应答反馈 信息表示所述第二用户设备接收第一用户设备发送业务数据是否正确;
在所述应答反馈信息表示所述第二用户设备没有正确接收所述业务数据的 情况下, 所述网络侧节点确认所述第一用户设备需要按照预设的往返时间 RTT 向所述第二用户设备重传所述业务数据。
11. 根据权利要求 10所述的方法,其中,所述网络侧节点确认所述第一用户设备需 要按照预设的往返时间 RTT向所述第二用户设备重传所述业务数据之前,还包 括- 所述网络侧节点不等待所述第二用户设备发送的所述应答反馈信息, 向所 述第一用户设备发送用于调度新业务数据传输的授权信息。
12. 根据权利要求 10所述的方法,其中,在所述网络侧节点确认所述第一用户设备 在所述应答反馈信息表示所述第二用户设备没有正确接收所述业务数据的情况 下需要按照预设的 RTT向所述第二用户设备重传所述业务数据之后还包括,所 述网络侧节点指示所述第一用户设备向所述第二用户设备重传所述业务数据。
13. 根据权利要求 12所述的方法,其中,所述网络侧节点通过以下信息至少之一指 示所述第一用户设备向所述第二用户设备重传所述业务数据: 所述应答反馈信 息、 授权信息。
14. 一种混合自动重传请求 HARQ传输装置,应用于处于设备到设备通信的第一用 户设备中, 包括- 发送模块, 设置为向第二用户设备发送业务数据;
检测模块, 设置为检测应答反馈信息和 /或授权信息, 其中, 所述应答反馈 信息用于表示所述第二用户设备接收所述业务数据是否正确;
重传模块, 设置为当所述应答反馈信息表示所述第二用户设备没有正确接 收所述业务数据和 /或当判断所述授权信息用于调度所述第一用户设备进行所 述业务数据重传时,指示所述发送模块按照预设的往返时间 RTT向所述第二用 户设备重传所述业务数据。
15. 根据权利要求 14所述的装置,其中,所述检测模块还设置为检测所述第二用户 设备发送的所述应答反馈信息, 所述重传模块还包括, 第一重传控制模块, 设 置为在所述应答反馈信息表示所述第二用户设备没有正确接收所述业务数据的 情况下,指示所述发送模块按照预设的 RTT向所述第二用户设备重传所述业务 数据。
16. 根据权利要求 14所述的装置,其中,所述检测模块还用于检测所述第二用户设 备发送的所述应答反馈信息, 所述重传模块包括,
判断模块, 设置为判断半持续调度的 HARQ进程是否被释放; 第二重传控制模块, 设置为在所述应答反馈信息表示所述第二用户设备没 有正确接收所述业务数据,以及所述半持续调度 HARQ进程没有被释放的情况 下, 指示所述发送模块按照预设的 RTT 向所述第二用户设备重传所述业务数 据。
17. 根据权利要求 14至 16中任一项所述的装置, 其中,
所述检测模块还设置为检测所述第二用户设备或网络侧节点发送的所述应 答反馈信息, 所述重传模块还设置为在所述应答反馈信息表示所述第二用户设 备没有正确接收所述业务数据时,指示所述发送模块按照预设的 RTT向所述第 二用户设备重传所述业务数据; 和 /或,
所述检测模块还设置为检测所述网络侧节点发送的所述授权信息, 所述重 传模块还设置为在所述授权信息用于调度所述第一用户设备进行所述业务数据 重传时,指示所述发送模块按照预设的 RTT向所述第二用户设备重传所述业务 数据。
18. 一种混合自动重传请求 HARQ传输装置,应用于设备到设备通信的网络侧节点 中, 包括:
接收模块, 设置为接收来自第二用户设备的应答反馈信息, 其中, 所述应 答反馈信息表示所述第二用户设备接收第一用户设备发送业务数据是否正确; 确认模块, 设置为在所述应答反馈信息表示所述第二用户设备没有正确接 收所述业务数据的情况下, 确认所述第一用户设备需要按照预设的往返时间 RTT向所述第二用户设备重传所述业务数据。
19. 根据权利要求 18所述的装置, 其中, 还包括第三重传控制模块, 设置为在所述 确认模块确认所述应答反馈信息表示所述第二用户设备没有正确接收所述业务 数据的情况下需要按照预设的 RTT 向所述第二用户设备重传所述业务数据之 后, 指示所述第一用户设备向所述第二用户设备重传所述业务数据。
20. 根据权利要求 18所述的装置, 其中, 还包括第二发送模块, 设置为向所述第一 用户设备转发所述应答反馈信息,和 /或在判断所述第二用户设备没有正确接收 所述业务数据时向所述第一用户设备发送授权信息, 所述授权信息用于调度所 述第一用户设备重传所述业务数据。
21. 根据权利要求 18至 20中任一项所述的装置, 其中, 还包括第三发送模块, 用 于不等待所述第二用户设备发送的所述应答反馈信息, 向所述第一用户设备发 送用于调度新业务数据传输的授权信息。
22. 一种混合自动重传请求 HARQ传输系统,包括权利要求 14至 17中任一项所述 的 HARQ传输装置, 还包括权利要求 18至 21中任一项所述的 HARQ传输装 置。
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