CN103368706A - Transmission method, device and system for hybrid automatic repeat request - Google Patents

Transmission method, device and system for hybrid automatic repeat request Download PDF

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Publication number
CN103368706A
CN103368706A CN2012100827176A CN201210082717A CN103368706A CN 103368706 A CN103368706 A CN 103368706A CN 2012100827176 A CN2012100827176 A CN 2012100827176A CN 201210082717 A CN201210082717 A CN 201210082717A CN 103368706 A CN103368706 A CN 103368706A
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CN
China
Prior art keywords
described
business datum
subscriber equipment
user equipment
feedback information
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CN2012100827176A
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Chinese (zh)
Inventor
吴栓栓
梁枫
袁弋非
袁明
张峻峰
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中兴通讯股份有限公司
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Priority to CN2012100827176A priority Critical patent/CN103368706A/en
Publication of CN103368706A publication Critical patent/CN103368706A/en

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    • 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 system ; ARQ protocols
    • H04L1/1867Arrangements specific to the transmitter end
    • H04L1/1887Scheduling and prioritising arrangements

Abstract

The invention discloses a transmission method, device and system for a hybrid automatic repeat request. The method, device and system are applied to device-to-device communication. The method includes: a first set of user equipment sends service data to a second set of user equipment; and the first set of user equipment detects response feedback information and/or authentication information, wherein the feedback information is used for representing whether the second set of user equipment receives the service data correctly; and when the response feedback information represents that the second set of user equipment does not receive the service data correctly and/or when it is judged that the authentication information is used for scheduling the first set of user equipment for retransmission of the service data, the first set of user equipment retransmits the service data to the second set of user equipment according to a preset round trip time. Through the transmission method, device and system for the mixed automatic retransmission requests, HARQ transmission problems in D2D communication are solved so that an HARQ transmission method based on the D2D communication is realized and reliability of the transmission method in a communication system is improved.

Description

Mixed automatic retransfer request transmission method, Apparatus and system

Technical field

The present invention relates to the communications field, in particular to a kind of mixed automatic retransfer request transmission method, Apparatus and system.

Background technology

Cellular communication system is owing to realized multiplexing to limited frequency spectrum resource, thereby so that wireless communication technology has obtained flourish.In cellular system, as two subscriber equipment (User Equipment, referred to as UE) between in service needed when transmission, arranged, subscriber equipment 1 (UE1) is to the business datum of subscriber equipment 2 (UE2), can at first be transferred to base station 1 by eating dishes without rice or wine, base station 1 by core net with this user data transmission to base station 2, base station 2 is transferred to UE2 with above-mentioned business datum again by eating dishes without rice or wine.UE2 adopts similar handling process to the business data transmission of UE1.Fig. 1 is the cellular communication schematic diagrames of two UE according to correlation technique when being positioned at same base station cell, as shown in Figure 1, when UE1 and UE2 are positioned at same cellular cell, although base station 1 and base station 2 are same websites so, yet a data transfer still can consume two parts of radio spectrum resources.

This shows, if subscriber equipment 1 and subscriber equipment 2 are positioned at same residential quarter and at a distance of nearer, so above-mentioned cellular communication method obviously is not optimum communication mode.And in fact, along with the variation of mobile communication business, for example, the application in wireless communication system such as social networks, E-Payment are more and more extensive, so that closely the transmission of the business between user demand is growing.Therefore, the communication pattern of device-to-device (Device-to-Device is referred to as D2D) is subject to extensive concern day by day.Fig. 2 is the preferred D2D communication system schematic diagram according to correlation technique, and so-called D2D as shown in Figure 2, refers to that business datum transmits without the base station, but directly is transferred to target UE by eating dishes without rice or wine by source user equipment.This communication pattern is different from the communication pattern of conventional cellular systems.For the user of short-range communication, D2D has not only saved radio spectrum resources, and has reduced the transfer of data pressure of core net.

For D2D communication, business datum is directly transmitted between UE.But, because the communication resource of cellular network is used in D2D communication, so D2D communication can be controlled by the network side of cellular network.And, for UE, when carrying out D2D communication, may also have the cellular transmission with network side.At this time, produces between the D2D communication that need to avoid UE and the cellular communication and conflict, for example, the conflict that mixed automatic retransfer request (Hybrid Automatic Repeat Request is referred to as HARQ) is transmitted.Because the transfer process of D2D communication is not identical with communication process and cellular communication, so the communication of the D2D in the cellular network can't be continued to use traditional cellular communication mode.

Problem for not existing in the correlation technique based on the HARQ transmission means of D2D communication not yet proposes effective solution at present.

Summary of the invention

Problem for not existing in the correlation technique based on the HARQ transmission means of D2D communication the invention provides a kind of mixed automatic retransfer request HARQ transmission method, Apparatus and system, to address the above problem at least.

According to an aspect of the present invention, provide a kind of mixed automatic retransfer request transmission method, be applied to device-to-device communication, having comprised: first user equipment sends business datum to the second subscriber equipment; Described first user equipment Inspection response feedback information and/or authorization message, wherein, described feedback information is used for representing whether described the second subscriber equipment receives described business datum correct; When representing that described the second subscriber equipment is incorrect, described response feedback information receives described business datum and/or when judging that described authorization message is used for dispatching described first user equipment and carries out described business datum when retransmitting, described first user equipment retransmits described business datum according to the RTT that presets to described the second subscriber equipment.

Preferably, described first user equipment sends described business datum to described the second subscriber equipment and comprises: described first user equipment Inspection is from the described authorization message of network side node; When described first user equipment judged that described authorization message is used for dispatching described first user equipment and sends described business datum, described first user equipment sent described business datum to described the second subscriber equipment.

Preferably, in the situation of the described response feedback information that described the second subscriber equipment of described first user equipment Inspection sends, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment and comprises, represent that in described response feedback information described the second subscriber equipment does not have correctly to receive in the situation of described business datum, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment.

Preferably, in the situation of the described response feedback information that described the second subscriber equipment of described first user equipment Inspection sends, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment and comprises described first user equipment judges whether the HARQ process of semi-continuous scheduling is released; Represent the described business datum of the incorrect reception of described the second subscriber equipment in described response feedback information, and the HARQ process of described semi-continuous scheduling do not have in the d/d situation, and described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment.

Preferably, in frequency division duplex system, described the second subscriber equipment is not more than the duration of 4 subframes from receiving described business datum to the feedback delay that sends described response feedback information to described first user equipment, the RTT of described HARQ transmission is the duration of 8 subframes; Or described the second subscriber equipment is not more than the duration of 8 subframes from receiving described business datum to the feedback delay that sends described response feedback information to described first user equipment, and described RTT is the duration of 16 subframes; In tdd systems, the feedback subframe that described the second subscriber equipment sends described response feedback information is that first of described the second subscriber equipment satisfies sub-frame interval and send subframe more than or equal to 4 device-to-device communication, described RTT is the duration of 10 subframes or identical with the RTT of cellular uplink, wherein, described sub-frame interval is that described first user equipment sends the subframe of described business datum and the interval that described the second user sends the subframe of described response feedback information to described the second subscriber equipment.

Preferably, the method also comprises: when judging that described first user equipment is finished to the described business datum of described the second user device transmissions, described first user equipment or described the second subscriber equipment send the request that discharges described semi-continuous scheduling to network side node.

Preferably, in the situation of the response feedback information that described the second subscriber equipment of described first user equipment Inspection or network side node send, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment and comprises, represent the described business datum of the incorrect reception of described the second subscriber equipment in described response feedback information, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment; And/or, in the situation of the described authorization message that the described network side node of described first user equipment Inspection sends, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment and comprises, judging that described authorization message is used for dispatching described first user equipment and carries out described business datum when retransmitting, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment.

Preferably, before the described response feedback information of described first user equipment Inspection, also comprise, described the second subscriber equipment receives described business datum, and according to receiving whether correctly send described response feedback information to described network side node, described network side node is transmitted to described first user equipment with described response feedback information; Before the described authorization message of described first user equipment Inspection, also comprise, when described response feedback information represented the described business datum of the incorrect reception of described the second subscriber equipment, described network side node sent for dispatching described first user equipment to described first user equipment and carries out the authorization message that described business datum retransmits.

Preferably, in frequency division duplex system, described the second subscriber equipment is not more than the duration of 2 subframes to the feedback delay that sends described response feedback information to described network side node from receiving described business datum, described network side node is not more than the duration of 2 subframes from receiving described response feedback information to the feedback delay that sends described response feedback information and/or authorization message to described first user equipment, described RTT is the duration of 8 subframes; Or described the second subscriber equipment is not more than the duration of 4 subframes to the feedback delay that sends described response feedback information to described network side node from receiving described business datum, described network side node is from receiving described response feedback information to the duration that is not more than 4 subframes to the described response feedback information of described first user device forwards or the feedback delay that sends described authorization message, and described RTT is the duration of 12 subframes or the duration of 16 subframes; Or described the second subscriber equipment is not more than the duration of 8 subframes to the feedback delay that sends described response feedback information from receiving described business datum, described network side node is from receiving described response feedback information to the duration that is not more than 4 subframes to the described response feedback information of described first user device forwards or the feedback delay that sends described authorization message, and described RTT is the duration of 16 subframes; In tdd systems, the feedback subframe that described the second subscriber equipment sends described response feedback information sends subframe for first satisfies sub-frame interval more than or equal to 4 device-to-device communication, described RTT is continuous two RTT sums of duration or the cellular uplink of 20 subframes, wherein, described sub-frame interval is that described first user equipment sends the subframe of described business datum and the interval that described the second user sends the subframe of described response feedback information to described the second subscriber equipment.

According to a further aspect in the invention, a kind of mixed automatic retransfer request transmission method is provided, be applied to device-to-device communication, comprise: network side node receives the response feedback information from the second subscriber equipment, wherein, described response feedback information represents whether described the second subscriber equipment receives first user equipment transmission business datum correct; Represent that in described response feedback information described the second subscriber equipment does not have correctly to receive in the situation of described business datum, described network side node confirms that described first user equipment need to retransmit described business datum to described the second subscriber equipment according to default RTT.

Preferably, before described network side node confirms that described first user equipment need to retransmit described business datum to described the second subscriber equipment according to default RTT, also comprise: described network side node is not waited for the described response feedback information that described the second subscriber equipment sends, and sends the authorization message that is used for scheduling new business transfer of data to described first user equipment.

Preferably, confirm that at described network side node described first user equipment represents in described response feedback information that described the second subscriber equipment does not have correctly to receive in the situation of described business datum and need to comprise also that after described the second subscriber equipment retransmits described business datum described network side node indicates described first user equipment to retransmit described business datum to described the second subscriber equipment according to default RTT.

Preferably, described network side node by following information one of at least the described first user equipment of indication retransmit described business datum to described the second subscriber equipment: described response feedback information, authorization message.

According to a further aspect in the invention, also provide a kind of mixed automatic retransfer request transmitting device, be applied to be in the first user equipment of device-to-device communication, having comprised: sending module is used for sending business datum to the second subscriber equipment; Detection module, for detection of response feedback information and/or authorization message, wherein, described response feedback information is used for representing whether described the second subscriber equipment receives described business datum correct; Retransmission module, be used for receiving described business datum and/or when judging that described authorization message is used for dispatching described first user equipment and carries out described business datum re-transmission, retransmitting described business datum according to the RTT that presets to described the second subscriber equipment when described response feedback information represents that described the second subscriber equipment is incorrect.

Preferably, the described response feedback information that described detection module also sends for detection of described the second subscriber equipment, described retransmission module also comprises, the first Retransmission control module, be used for representing that in described response feedback information described the second subscriber equipment does not have correctly to receive in the situation of described business datum, retransmit described business datum according to default RTT to described the second subscriber equipment.

Preferably, the described response feedback information that described detection module also sends for detection of described the second subscriber equipment, described retransmission module comprises, judge module is used for judging whether the HARQ process of semi-continuous scheduling is released; The second Retransmission control module, be used for representing the described business datum of the incorrect reception of described the second subscriber equipment in described response feedback information, and described semi-continuous scheduling HARQ process do not have in the d/d situation, retransmits described business datum according to default RTT to described the second subscriber equipment.

Preferably, the described response feedback information that described detection module also sends for detection of described the second subscriber equipment or network side node, described retransmission module also is used for retransmitting described business datum according to default RTT to described the second subscriber equipment when described response feedback information represents the described business datum of the incorrect reception of described the second subscriber equipment.And/or, the described authorization message that described detection module also sends for detection of described network side node, described retransmission module also is used for being used for dispatching described first user equipment in described authorization message and carries out described business datum when retransmitting, and retransmits described business datum according to default RTT to described the second subscriber equipment.

According to a further aspect in the invention, a kind of mixed automatic retransfer request transmitting device is provided, be applied in the network side node of device-to-device communication, comprise: receiver module, be used for receiving the response feedback information from the second subscriber equipment, wherein, described response feedback information represents whether described the second subscriber equipment receives first user equipment transmission business datum correct; Confirm module, be used for representing that in described response feedback information described the second subscriber equipment does not have correctly to receive in the situation of described business datum, confirm that described first user equipment need to retransmit described business datum to described the second subscriber equipment according to default RTT.

Preferably, this device also comprises the retransmission control module, be used for confirming that in described affirmation module described response feedback information represents that described the second subscriber equipment not have correctly to receive in the situation of described business datum and need to according to the RTT that presets after described the second subscriber equipment retransmits described business datum, indicate described first user equipment to retransmit described business datum to described the second subscriber equipment.

Preferably, this device also comprises the second sending module, be used for to the described response feedback information of described first user device forwards, and/or when judging the described business datum of the incorrect reception of described the second subscriber equipment, sending authorization message to described first user equipment, described authorization message is used for dispatching described first user equipment and retransmits described business datum.

Preferably, this device also comprises the 3rd sending module, is used for not waiting for the described response feedback information of described the second subscriber equipment transmission, sends the authorization message that is used for scheduling new business transfer of data to described first user equipment.

According to a further aspect in the invention, also provide a kind of mixed automatic retransfer request transmission system, comprised the above-mentioned HARQ transmitting device that is arranged in first user equipment, also comprised the above-mentioned HARQ transmitting device that is arranged in network side node.

By the present invention, adopted a kind of mixed automatic retransfer request transmission method, be applied to the environment of device-to-device communication, the method comprises: first user equipment sends business datum to the second subscriber equipment; First user equipment Inspection response feedback information and/or authorization message, wherein, whether this feedback information is used for expression the second user device to receive service data correct; When representing that the second subscriber equipment is incorrect, this response feedback information receives business datum and/or when judging that this authorization message is used for scheduling first user equipment and carries out the business datum re-transmission, first user equipment is according to retransmitting business datum to the second subscriber equipment default two-way time, solved the problem of the HARQ transmission of D2D communication, and then reached the HARQ transmission that realizes D2D communication, improved the effect of the reliability of transmitting in the communication system.

Description of drawings

Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:

Fig. 1 is the cellular communication schematic diagrames of two UE according to correlation technique when being positioned at same base station cell;

Fig. 2 is the preferred D2D communication system schematic diagram according to correlation technique;

Fig. 3 is the flow chart according to the mixed automatic retransfer request transmission method of the embodiment of the invention;

Fig. 4 is the flow chart according to the mixed automatic retransfer request transmission method that is applied to network side of the embodiment of the invention;

Fig. 5 is the structured flowchart according to the mixed automatic retransfer request transmitting device of the embodiment of the invention;

Fig. 6 is the preferred structure block diagram one according to retransmission module 56 in the mixed automatic retransfer request transmitting device of the embodiment of the invention;

Fig. 7 is the preferred structure block diagram two according to retransmission module 56 in the mixed automatic retransfer request transmitting device of the embodiment of the invention;

Fig. 8 is another structured flowchart according to the mixed automatic retransfer request transmitting device of the embodiment of the invention;

Fig. 9 is the preferred structure block diagram one according to the mixed automatic retransfer request transmitting device of the embodiment of the invention;

Figure 10 is according to the frame structure schematic diagram of the embodiment of the invention in the LTE/LTE-A system;

Figure 11 is the flow chart of the HARQ transmission method of according to the preferred embodiment of the invention device-to-device communication;

Figure 12 uses sub-frame of uplink to carry out the schematic diagram one of the HARQ transmission of D2D communication in the FDD system according to the embodiment of the invention;

Figure 13 uses for 1 time sub-frame of uplink to carry out the schematic diagram one of the HARQ transmission of D2D communication according to the uplink-downlink configuration of the embodiment of the invention in the TDD system;

Figure 14 uses for 6 times sub-frame of uplink to carry out the schematic diagram one of the HARQ transmission of D2D communication according to the uplink-downlink configuration of the embodiment of the invention in the TDD system;

Figure 15 uses sub-frame of uplink to carry out the schematic diagram two of the HARQ transmission of D2D communication according to the embodiment of the invention in the FDD system;

Figure 16 uses sub-frame of uplink to carry out the schematic diagram three of the HARQ transmission of D2D communication in the FDD system according to the embodiment of the invention;

Figure 17 is that another uses sub-frame of uplink to carry out the schematic diagram three of the HARQ transmission of D2D communication in the FDD system according to the embodiment of the invention;

Figure 18 is that another uses sub-frame of uplink to carry out the schematic diagram three of the HARQ transmission of D2D communication in the FDD system according to the embodiment of the invention;

Figure 19 3 time uses sub-frame of uplink to carry out the schematic diagram three of the HARQ transmission of D2D communication in uplink-downlink configuration according to the embodiment of the invention in the TDD system;

Figure 20 6 time uses sub-frame of uplink to carry out the schematic diagram three of the HARQ transmission of D2D communication in uplink-downlink configuration according to the embodiment of the invention in the TDD system.;

Figure 21 is the preferred structure block diagram two according to the mixed automatic retransfer request transmitting device of the embodiment of the invention;

Figure 22 is the preferred structure block diagram three according to the mixed automatic retransfer request transmitting device of the embodiment of the invention;

Figure 23 is the structured flowchart according to the mixed automatic retransfer request transmission system of the embodiment of the invention.

Embodiment

Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.

HARQ (Automatic Repeat Request is referred to as ARQ) is the important error correction method in the packet communication.Mixed automatic retransfer request (Hybrid-ARQ) is then by introducing forward error correction (Forward Error Correct is referred to as FEC) in ARQ, reach the purpose that reduces number of retransmissions, thereby so that the systematic function of radio communication promoted.

In the cellular communication system of supporting D2D communication, the subscriber equipment that carries out D2D communication may need to carry out data interaction with network side simultaneously, for example receives the data that network node sends, and perhaps sends data to network node.When communicate by letter with D2D coexistence and when all being controlled and being dispatched by network side, a potential problem that faces is the conflict that cellular communication is communicated by letter with D2D of cellular communication.For the first transmission of packet, can avoid both conflicts by the mode in different resources with D2D communication and cellular communication scheduling, for example it is dispatched in different subframes.But for retransmitting, problem may more complicated.For example, cellular uplink adopts the transmission means of synchronous HARQ, and namely after the first biography of packet, the position of re-transmission is determined.Therefore, when ascending resource was used in the D2D transmission, if D2D HARQ design is improper, the D2D transmission may produce with the re-transmission of cellular transmission and conflict.For cellular link synchronous HARQ transmission means, conflict may not can be confined to once transmit, but the transmission of all subframes of this process.

On the other hand, D2D communication is network controls, that is to say that the control node does not participate in transmission and the reception of business datum, and the Signalling exchange that the control node need to be eated dishes without rice or wine with the Data transmitting and receiving node, this may cause D2D communication flow process than cellular communication to increase.

Based on above-mentioned consideration, in the present embodiment, a kind of mixed automatic retransfer request (HARQ) transmission method is provided, be applied to device-to-device (D2D) communication, Fig. 3 is the flow chart according to the mixed automatic retransfer request transmission method of the embodiment of the invention, as shown in Figure 3, the method comprises the steps:

Step S302, first user equipment sends business datum to the second subscriber equipment;

Step S304, first user equipment Inspection response feedback information and/or authorization message, wherein, whether this feedback information is used for expression the second user device to receive service data correct;

Step S306, when response feedback information (for example represents the incorrect reception business datum of the second subscriber equipment, this response feedback information is negative response (NACK)) and/or when judging that authorization message is carried out the business datum re-transmission for scheduling first user equipment, first user equipment is according to retransmitting business datum to the second subscriber equipment default two-way time (Round Trip Time is referred to as RTT).

Pass through above-mentioned steps, in the communication environment of D2D, first user equipment (for example, can be source user equipment) to the second subscriber equipment (for example, can be target UE) send business datum after, receiving feedback information (for example, above-mentioned response feedback information) and/or authorization message, and in the situation of feedback information and/or the above-mentioned business datum of authorization message indication re-transmission, carry out the re-transmission of business datum.Solve the problem of the HARQ transmission of D2D communication in the correlation technique, so that under the D2D communication mode, also can carry out the HARQ transmission, improved the reliability of transmitting in the communication system.

In addition, because first user equipment can determine whether to retransmit by feedback information and/or authorization message, can retransmit without the indication of network side node, and since at present the communications feedback time between first user equipment, the second subscriber equipment and the network side usually can not surpass 4 sub-frame interval, thereby on flow process for retransmit the used process of business datum as much as possible with the HARQ process of cellular system mutually compatibility provide possible.

Preferably, before step S302, first user equipment can detect the authorization message from network side node; When first user equipment judged that authorization message is used for scheduling first user equipment transmission business datum, first user equipment sent business datum to the second subscriber equipment.In this way, can be so that D2D HARQ transmission under the control of network side node, have improved the reliability and safety of D2D HARQ transmission.

In order to improve the compatibility between D2D transmission and the cellular transmission, as a kind of preferred implementation, can send authorization message to first user equipment by network side node and come first user equipment communicated by letter with D2D between the second subscriber equipment and control.In this case, first user equipment can receive the authorization message from network side node, and first user equipment sends business datum according to this authorization message to the second subscriber equipment.Certainly, after the business data transmission success of a D2D or finishing, network side node also can be by new business datum indication information (being shown example with the indication information of this new business datum at above-mentioned authorization message middle finger hereinafter describes) indication first user equipment send new business datum, perhaps initiate the HARQ transfer process of the business datum of next D2D.

In the FDD system, the RTT of the HARQ process of cellular communication up link is generally 8 subframe durations, also namely in the FDD system, when first user equipment at subframe n after network side sends business datum, if need to retransmit, then first user equipment can retransmit this business datum to network side at subframe n+8.And communicate by letter for D2D, consider when by network side node control D2D HARQ transmission, if network side node (for example sends control signaling after waiting for the feedback information that receives the second subscriber equipment again, authorization message or HARQ indication information), and first user equipment waits for that also the indication of the control signal of network side node retransmits again or the transmission of new business, and first user equipment just possibly can't guarantee to carry out the re-transmission of business datum with the RTT identical with honeycomb HARQ process RTT so.Therefore, in order further to reduce conflicting between D2D HARQ process and the honeycomb HARQ process, improve resource utilization ratio, several preferred implementations are processed below providing in the present embodiment.

As a kind of preferred implementation one, network side node can not waited for the feedback information of the second subscriber equipment, just first user equipment is sent and be used to indicate the authorization message that first user equipment sends the new business data, so that first user equipment can get access to this authorization message when needs send new business, thereby does not affect the transmission process of first user equipment.Simultaneously, though first user equipment before receiving feedback information or after receive the authorization message that network side node is sent, all can this authorization message not processed first, but wait for first the response feedback information that receives from the second subscriber equipment, after receiving feedback information, feedback information is processed.Finding that response feedback information represents that the second subscriber equipment (does not for example have correctly to receive in the situation of business datum, in the situation for NACK), first user equipment can be ignored above-mentioned authorization message, retransmits business datum according to default RTT to the second subscriber equipment; And when feedback information be in the situation of affirmative acknowledgement (ACK), first user equipment carries out the transmission of new business data according to the indication of above-mentioned authorization message.In this way, network side node sends the action of authorization message and the action of the second subscriber equipment transmission feedback information does not have successively sequential relationship, thereby saved the processing time of HARQ transmission between the D2D equipment, on flow process, guaranteed that further D2D HARQ process can be compatible or consistent mutually with honeycomb HARQ process.

As a kind of preferred implementation two, also can reduce by the mode of semi-continuous scheduling conflicting between D2D HARQ process and the honeycomb HARQ process, for example, network side node sends authorization message, to open the HARQ process of a semi-continuous scheduling.In the situation of first user equipment reception from the feedback information of the second subscriber equipment, first user equipment can judge whether the HARQ process of this semi-continuous scheduling is released, wherein, the release here can be to arrive in the cycle of semi-continuous scheduling, also can be that first user equipment and/or the second user equipment requests discharge this semi-continuous scheduling etc.; Sent by the second subscriber equipment at feedback information, and feedback information represents the incorrect business datum that receives of the second subscriber equipment, and semi-continuous scheduling do not have in the d/d situation, and first user equipment retransmits business datum according to default RTT to the second subscriber equipment.In this way, network side node has only carried out the transmission of an authorization message in initialization or when reinitializing semi-continuous scheduling, can in follow-up D2D HARQ transmission course, not participate in the scheduling of re-transmission, thereby saved the processing time between the D2D equipment, on flow process, guaranteed that further D2D HARQ process can be compatible or consistent mutually with honeycomb HARQ process.

Preferably, in the situation that first user equipment is finished to the second user device transmissions business datum, when namely transfer of data had been finished, first user equipment or the second subscriber equipment can send the request that discharges semi-continuous scheduling to network side node.For example, first user equipment is judged when transfer of data is finished, and sends the request that discharges semi-continuous scheduling to network side node; Perhaps, when the second subscriber equipment receives continuous several sky packets of first user device transmission, can judge that then transfer of data finishes, the second subscriber equipment sends the request that discharges semi-continuous scheduling to network side node.

In the above in two kinds of situations, in Frequency Division Duplexing (FDD) (FDD) system, the second subscriber equipment from the duration that receives business datum to the feedback delay that sends response feedback information to first user equipment and be not more than 4 subframes (for example, can equal duration or the 4ms of 4 subframes), the RTT of HARQ transmission is the duration (for example, can equal 8ms) of 8 subframes; Or second subscriber equipment from the duration that receives business datum to the feedback delay that sends response feedback information to first user equipment and be not more than 8 subframes (for example, can equal duration or the 8ms of 8 subframes), RTT is the duration (for example, can equal 16ms) of 16 subframes;

And in time division duplex (TDD) system, the feedback subframe that the second subscriber equipment sends response feedback information is that first of the second subscriber equipment satisfies the interval and send subframe more than or equal to 4 device-to-device communication, RTT be 10 subframes duration (for example, can equal 10ms) or identical with the RTT of cellular uplink, wherein, be spaced apart first user equipment and send the subframe of business datum and the interval that the second user sends the subframe of response feedback information to the second subscriber equipment.

As a kind of preferred implementation three, D2D HARQ transfer process can also be set be: the indication of the authorization message that first user equipment sends according to network side node sends business datum to the second subscriber equipment; The second subscriber equipment sends feedback information according to the success or not that sends business datum to network side node; Network side node retransmits or sends the new business data according to feedback information to the indication of first user equipment.The mode of network side node indication can be to be undertaken by sending indication information to first user equipment, for example, network side node can send authorization message or HARQ indication information (HARQ Indicator) to first user equipment, comprises above-mentioned feedback information (being response feedback information) in this HARQ indication information.

At this moment, represent the incorrect business datum that receives of the second subscriber equipment at feedback information from the second subscriber equipment or network side node and this feedback information, and/or in authorization message from network side node, and when authorization message was carried out the business datum re-transmission for scheduling first user equipment, first user equipment can retransmit business datum to the second subscriber equipment according to default RTT.

Before first user equipment received authorization message or feedback information, the second subscriber equipment can also receive business datum, and whether correctly sent response feedback information to network side node according to receiving; Network side node is transmitted to first user equipment with response feedback information.

Under this HARQ transfer process, it is comparatively complicated that transmission course is compared front two kinds of D2D HARQ transmission meanss, might take the more HARQ transmission process of first user equipment, so that the HARQ transmission process of first user equipment in cellular system is restricted, therefore, can also be by system feedback time delay and D2D HARQ transmission process be equipped with to realize improving resource utilization ratio.

For example, in frequency division duplex system, the second subscriber equipment can be set (for example be not more than 2 subframe durations from receiving business datum to the feedback delay that sends feedback information to network side node, can equal duration or the 2ms of 2 subframes), network side node (for example also is not more than 2 subframe durations from receiving response feedback information to the feedback delay that sends feedback information to first user equipment, can equal duration or the 2ms of 2 subframes), at this moment, the predetermined RTT of D2D HARQ transmission process can be 8 subframe durations (for example, can equal 8ms).

Certainly, the second subscriber equipment also can be set (for example be not more than 4 subframe durations from receiving business datum to the feedback delay that sends feedback information to network side node, can equal duration or the 4ms of 4 subframes), network side node (for example also is not more than 4 subframe durations from receiving response feedback information to the feedback delay that sends feedback information to first user equipment, can equal duration or the 4ms of 4 subframes), at this moment, the RTT of D2D HARQ transmission process can for 12 subframe durations (for example, can equal 12ms) or 16 subframe durations (for example, can equal 16ms).

In addition, the second subscriber equipment can also be set (for example be not more than 8 subframe durations from receiving business datum to the feedback delay that sends feedback information to network side node, can equal duration or the 8ms of 8 subframes), network side node is not more than 4 subframe durations (for example, can equal duration or the 4ms of 4 subframes) from receiving response feedback information to the feedback delay that sends feedback information to first user equipment; Perhaps conversely, the second subscriber equipment is set (for example is not more than 4 subframe durations from receiving business datum to the feedback delay that sends feedback information to network side node, can equal duration or the 4ms of 4 subframes), network side node is not more than 8 subframe durations (for example, can equal duration or the 8ms of 8 subframes) from receiving response feedback information to the feedback delay that sends feedback information to first user equipment.At this moment, the RTT of D2D HARQ transmission process can be 16 subframe durations (for example, can equal 16ms).

And in tdd systems, the feedback subframe that the second subscriber equipment sends response feedback information satisfies the interval more than or equal to 4 sub-frame of uplink for first, or second first of subscriber equipment satisfy the interval and send subframe more than or equal to 4 device-to-device communication, the RTT of D2D HARQ transmission this moment process is continuous two RTT sums of duration or the cellular uplink of 20 subframes, wherein, be spaced apart first user equipment and send the subframe of business datum and the interval that the second subscriber equipment sends the subframe of response feedback information to the second subscriber equipment.

Situation in preferred implementation three is lower, although compare above-mentioned several execution mode, the utilance of the system resource of single D2D HARQ transmission process is relatively low, but because D2D communication is transmitted in both directions, therefore can be with the idle subframe of the cellular communication process that takies as other D2D HARQ transmission processes, for example be used for the second subscriber equipment and send business datum to first user equipment, thereby also can improve the utilance of system resource.

In the present embodiment, another kind of mixed automatic retransfer request (HARQ) transmission method also is provided, be applied to device-to-device communication, Fig. 4 is the flow chart according to the mixed automatic retransfer request transmission method that is applied to network side of the embodiment of the invention, as shown in Figure 4, the method comprises the steps:

Step S402, network side node receives the response feedback information from the second subscriber equipment, and wherein, this response feedback information represents whether the second subscriber equipment receives first user equipment transmission business datum correct;

Step S404 represents that in this response feedback information the second subscriber equipment does not have correctly to receive in the situation of business datum, and network side node confirms that first user equipment need to retransmit above-mentioned business datum to the second subscriber equipment according to default two-way time.

Pass through above-mentioned steps, network side node can be by the feedback information from the second subscriber equipment, confirm whether first user equipment need to retransmit to the second subscriber equipment according to default RTT, thereby when transmission is controlled to D2D HARQ, the feedback information that can not wait for the second subscriber equipment just sends authorization message to first user equipment, and after receiving feedback information, if feedback information is NACK, confirm that then the authorization message that sends is invalid, if feedback information is ACK, confirm that then the authorization message that sends works.Thereby do not need to have guaranteed to wait for that in flow process feedback information can send to first user equipment the possibility of authorization message, for retransmit the used process of business datum as much as possible with the HARQ process of cellular system mutually compatibility provide may.Solve the problem that does not exist in the correlation technique based on the HARQ transmission means of D2D communication, so that under the D2D communication mode, also can carry out the HARQ transmission, improved the flexibility of transmission means in the communication system, reliability and compatibility.

As a kind of preferred implementation, suppose that D2D HARQ transmission process is: first user equipment sends business datum according to the indication of the authorization message of network side node transmission to the second subscriber equipment; The second subscriber equipment sends feedback information according to the success or not that sends business datum to network side node; Network side node retransmits or sends the new business data according to feedback information to the indication of first user equipment.In this case, network side node can indicate first user equipment to retransmit business datum to the second subscriber equipment.

Preferably, in above-mentioned process, for simple flow, before step S404, network side node can not waited for the response feedback information that the second subscriber equipment sends, and sends the authorization message that is used for scheduling new business transfer of data to first user equipment.In this way, if first user equipment is finished to the second user device transmissions business datum, then first user equipment can directly send new business datum according to this authorization message that is used for scheduling new business transfer of data; And if first user equipment is to the failure of the second user device transmissions business datum, business datum before need to retransmitting to the second subscriber equipment, then first user equipment can be ignored the authorization message that is used for scheduling new business transfer of data that receives, but retransmits business datum.In this case, network side node can confirm by the step of step S404 whether first user equipment needs to retransmit, if necessary, the authorization message that is used for scheduling new business transfer of data that sends before then thinking is invalid, and can select a good opportunity afterwards sends this authorization message again; If network side node confirms that first user equipment does not need to retransmit, this authorization message of transmission comes into force before then thinking.

Network side node can indicate first user equipment to retransmit business datum to the second subscriber equipment in several ways, preferably, network side node can be indicated one of at least by following information: HARQ indication information, authorization message, if HARQ indication information, network side node can be included in response feedback information the first user equipment of issuing in this indication information, if authorization message, network side node can arrange this authorization message and be used to indicate first user equipment re-transmission business datum.

A kind of mixed automatic retransfer request (HARQ) transmitting device is provided in the present embodiment, be applied in the first user equipment of device-to-device communication, this device is used for realizing above-described embodiment and preferred implementation, had carried out repeating no more of explanation.As used below, the combination of software and/or the hardware of predetermined function can be realized in term " module ".Although the described device of following examples is preferably realized with software, hardware, perhaps the realization of the combination of software and hardware also may and be conceived.

Fig. 5 is that as shown in Figure 5, this device comprises sending module 52, detection module 54 and retransmission module 56 according to the structured flowchart of the mixed automatic retransfer request HARQ transmitting device of the embodiment of the invention.The below describes this device.

Sending module 52 is used for sending business datum to the second subscriber equipment; Detection module 54 is connected to sending module 52, and for detection of response feedback information and/or authorization message, wherein, whether this feedback information is used for expression the second user device to receive service data correct; Retransmission control module 56, be connected to detection module 54, be used for receiving business datum and/or when judging that authorization message is used for scheduling first user equipment and carries out business datum when retransmitting when response feedback information represents that the second subscriber equipment is incorrect, indication sending module 52 according to the RTT that presets to the second subscriber equipment re-transmission business datum.

Preferably, Fig. 6 is the preferred structure block diagram one according to retransmission module 56 in mixed automatic retransfer request (HARQ) transmitting device of the embodiment of the invention, as shown in Figure 6, detection module 54 can also be for detection of the response feedback information of the second subscriber equipment transmission, this retransmission module 56 can also comprise, the first Retransmission control module 62, be connected to this detection module 54, be used for representing that in response feedback information the second subscriber equipment does not have correctly to receive in the situation of business datum that indication sending module 52 retransmits business datum according to default RTT to the second subscriber equipment.

Fig. 7 is the preferred structure block diagram two according to retransmission module 56 in mixed automatic retransfer request (HARQ) transmitting device of the embodiment of the invention, as shown in Figure 7, detection module 54 can also be for detection of the response feedback information of the second subscriber equipment transmission, this retransmission module 56 can comprise judge module 72 and the second Retransmission control module 74, this judge module 72 is used for judging whether the HARQ process of semi-continuous scheduling is released; The second Retransmission control module 74, be connected to this judge module 72, be used for representing the incorrect business datum that receives of the second subscriber equipment in response feedback information, and semi-continuous scheduling HARQ process do not have in the d/d situation, and indication sending module 52 retransmits business datum according to default RTT to the second subscriber equipment.

Preferably, detection module 54 can also be for detection of the response feedback information of the second subscriber equipment or network side node transmission, retransmission module 56 can also be used for when this response feedback information represents the incorrect reception business datum of the second subscriber equipment, and indication sending module 52 retransmits business datum according to default RTT to the second subscriber equipment; And/or,

Detection module can also be for detection of the authorization message of network side node transmission, retransmission module 56 can also be used for being used for scheduling first user equipment in this authorization message and carry out business datum when retransmitting, and indication sending module 52 retransmits business datum according to default RTT to the second subscriber equipment.

A kind of mixed automatic retransfer request (HARQ) transmitting device also is provided in the present embodiment, this application of installation is in the network side node of device-to-device communication, Fig. 8 is another structured flowchart according to mixed automatic retransfer request (HARQ) transmitting device of the embodiment of the invention, as shown in Figure 8, this device comprises receiver module 82, be used for receiving the feedback information from the second subscriber equipment, wherein, this feedback information feeds back this second subscriber equipment and receives first user equipment whether send business datum correct; Confirm module 84, be connected to this receiver module 82, be used for representing that in response feedback information the second subscriber equipment does not have correctly to receive in the situation of business datum, confirm that first user equipment need to retransmit business datum to the second subscriber equipment according to default two-way time.

Fig. 9 is the preferred structure block diagram one according to mixed automatic retransfer request (HARQ) transmitting device of the embodiment of the invention, as shown in Figure 9, this device comprises outside all modules among Fig. 8, also comprise retransmission control module 92, link to each other with affirmation module 84, be used for confirming that in this affirmations module 84 response feedback information represent that the second subscriber equipment not have correctly to receive in the situation of business datum and need to according to the RTT that presets after the second subscriber equipment re-transmission business datum, indicate first user equipment to the second subscriber equipment re-transmission business datum.

Figure 21 is the preferred structure block diagram two according to mixed automatic retransfer request (HARQ) transmitting device of the embodiment of the invention, as shown in figure 21, this device can also comprise the second sending module 94, link to each other with receiver module 82, be used for to first user device forwards response feedback information, and/or when judging the incorrect reception business datum of the second subscriber equipment, sending authorization message to first user equipment, authorization message is used for scheduling first user equipment and retransmits business datum.

Figure 22 is the preferred structure block diagram three according to mixed automatic retransfer request (HARQ) transmitting device of the embodiment of the invention, as shown in figure 22, this device can also comprise the 3rd sending module 96, link to each other with receiver module 82, be used for not waiting for the response feedback information of the second subscriber equipment transmission, send the authorization message that is used for scheduling new business transfer of data to first user equipment.

A kind of mixed automatic retransfer request (HARQ) transmission system also is provided in the present embodiment, Figure 23 is the structured flowchart according to the mixed automatic retransfer request transmission system of the embodiment of the invention, as shown in figure 23, this system comprises the HARQ transmitting device (illustrating as an example of Fig. 5 example at Figure 23) that is arranged in first user equipment in the D2D transmission, also comprises the HARQ transmitting device (illustrating as an example of Fig. 8 example at Figure 23) that is arranged in network side node in the D2D transmission.

Describe below in conjunction with preferred embodiment, following preferred embodiment combines above-described embodiment and preferred implementation thereof.

In following preferred embodiment, HARQ transmission method and the device of device-to-device communication are provided, have related in particular to cellular communication communicate by letter with device-to-device mixed automatic retransfer request (HARQ) transmission method and the device of the device-to-device communication in the wireless communication system of coexistence.Below the main so that scene of carrying out D2D communication with ascending resource, communication uses the synchronous HARQ transmission means to describe as example to D2D, and following three kinds of synchronous HARQ implementations based on D2D communication are provided, and still is not limited to this three kinds of implementations.

Mode 1:ACK/NACK (be called for short A/N) feedback authorizes (grant) to transmit simultaneously with D2D-, ignores grant and retransmit when being fed back to NACK; The HARQ process of D2D HARQ process and honeycomb (cellular) is consistent.

For example, mixed automatic retransfer request (HARQ) transmission method of device-to-device communication can comprise: first user equipment sends business datum according to the indication of authorization message to the second subscriber equipment; Above-mentioned the second subscriber equipment receives above-mentioned business datum, and according to receiving the feedback information that whether correctly sends affirmative acknowledgement (ACK) or negative response (NACK); If above-mentioned feedback information is NACK, first user equipment retransmits defeated above-mentioned business datum in the default time to the second subscriber equipment.

Preferably, network side node can not wait for that above-mentioned feedback information arrives, and sends authorization message to first user equipment and carries out new data transmission to trigger above-mentioned first user equipment.

Preferably, the above-mentioned response feedback information of above-mentioned the second subscriber equipment transmission of above-mentioned first user equipment Inspection; The authorization message of the above-mentioned new data transmission of above-mentioned first user equipment Inspection (this may just can be carried out after receiving ACK); If above-mentioned feedback information is NACK, above-mentioned first user equipment is ignored above-mentioned authorization message, retransmits above-mentioned business datum at Preset Time to the second subscriber equipment; If above-mentioned feedback information is ACK, above-mentioned first user equipment sends the new business data according to the indication of above-mentioned authorization message.

The HARQ transmission method of semi-continuous scheduling is used in mode 2:D2D communication; The HARQ process of D2D HARQ process and cellular is consistent.

For example, mixed automatic retransfer request (HARQ) transmission method of device-to-device communication can comprise: first user equipment sends business datum according to the indication of authorization message to the second subscriber equipment; Above-mentioned the second subscriber equipment receives above-mentioned business datum, and according to receiving the feedback information that whether correctly sends ACK or NACK; If above-mentioned feedback information is NACK, first user equipment retransmits defeated above-mentioned business datum in the default time to the second subscriber equipment.

Preferably, the above-mentioned feedback information of above-mentioned the second subscriber equipment transmission of above-mentioned first user equipment Inspection; If above-mentioned feedback information is NACK, above-mentioned first user is retransmitted above-mentioned business datum at Preset Time to the second subscriber equipment; , and judge when semi-continuous scheduling is not released that above-mentioned first user equipment sends the new business data if above-mentioned feedback information is ACK.

Mode 3:D2D HARQ adopts the flow process of step by step, i.e. eNB scheduling UE1 transmits, and UE1 the transmission of data, UE2 receive and to eNB feedback A/N, eNB determines whether that according to feedback information scheduling retransmits.Different groups can be divided into again according to the process difference, for example, in Frequency Division Duplexing (FDD) (Frequency-Division Duplex is referred to as FDD) system, 3 groups can be divided into according to the process difference: 8/12/16 HARQ process.Wherein, when the HARQ process is 8 sub-frame interval, can guarantees that process and cellular are compatible, but need rapid feedback, for example need feedback time to be not more than 2ms; When the HARQ process is 12 sub-frame interval, can meet all principles that normal feedback time is not more than 4ms, but this process and cellular may be incompatible; When the HARQ process is 16 sub-frame interval, both can guarantee the compatibility of the HARQ process of the process of D2D HARQ and cellular, and can not bring the problem in the realization.

For example, mixed automatic retransfer request (HARQ) transmission method of device-to-device communication can comprise: first user equipment sends business datum according to the indication of authorization message to the second subscriber equipment; Above-mentioned the second subscriber equipment receives above-mentioned business datum, and according to receiving the feedback information that whether correctly sends ACK or NACK; If above-mentioned feedback information is NACK, first user equipment retransmits defeated above-mentioned business datum in the default time to the second subscriber equipment.

Preferably, if above-mentioned feedback information is NACK, network side node can send authorization message and/or HARQ indication information to first user equipment, triggers above-mentioned first user equipment and retransmits above-mentioned business datum at Preset Time to the second subscriber equipment; Perhaps, if above-mentioned feedback information is NACK, network side node can trigger above-mentioned first user equipment by this feedback information and retransmit above-mentioned business datum at Preset Time to the second subscriber equipment.

By above-mentioned three kinds of modes, in FDD system, when feedback delay is 2 or 4 milliseconds, the two-way time of above-mentioned D2D HARQ, (Round Trip Time is referred to as RTT) can be identical with the RTT of cellular uplink, is 8 sub-frame interval; Perhaps, when feedback delay is 4 milliseconds, the RTT of above-mentioned D2D HARQ can be 12 or 16 milliseconds; Perhaps, when feedback delay is 8 milliseconds, the RTT of above-mentioned D2D HARQ can be 16 milliseconds.

And in TDD system, feedback delay can be determined according to the D2D sub-frame allocation.Preferably, the feedback subframe can send subframe more than or equal to 4 D2D for first of above-mentioned the second subscriber equipment satisfies the interval, and wherein, this interval refers to the interval of the D2D transmission subframe of above-mentioned business data transmission subframe and above-mentioned the second subscriber equipment; In this case, the RTT of above-mentioned D2DHARQ can be 10 or 20 milliseconds; Perhaps, the RTT of above-mentioned D2D HARQ can be identical with the RTT of cellular uplink, is 8 sub-frame interval.

To sum up, by above-mentioned wireless communications method and device, solved the HARQ transmission problem of D2D communication in the cellular communication system, and the HARQ process that can effectively the avoid cellular communication HARQ process of communicating by letter with D2D produce to be disturbed, and has guaranteed efficient and the reliability of the device-to-device communication in the cellular system.

According to above-described embodiment and preferred embodiment, describe below in conjunction with concrete operations.

(device embodiment 1)

In order to address the above problem, provide in the present embodiment a kind of HARQ transmitting device for device-to-device communication.This application of installation is in the subscriber equipment of device-to-device communication environment, and this device comprises: detection module, for detection of authorization message and/or feedback information; Determination module; Be used for determining according to the default time time location of transmission and/or the re-transmission of business datum; Sending module: be used for the indication according to detection module, the time location of determining at determination module send or retransmitter to the business datum of devices communicating.

More preferably, this device also comprises: the Retransmission control module is used for the testing result specified data transport behavior according to detection module.The transfer of data behavior comprises: when detecting feedback information and be NACK, ignore this authorization message, and indicate this sending module retransmitter to the business datum of devices communicating; When detecting feedback information and be ACK, indicate this sending module according to the indication transmitting apparatus of this authorization message to devices communicating new business data.

Perhaps, the transfer of data behavior comprises: when detecting feedback information and be NACK, the time location that the indication sending module is determined at determination module is retransmitted this business datum; Be ACK when detecting feedback information, and judge that transmitting apparatus was to devices communicating new business data when this HARQ transmission process was not released.

Perhaps, the transfer of data behavior comprises: when detecting authorization message, according to the indication transmission of this authorization message or the retransmitter business datum to devices communicating; Perhaps, when the HARQ indication that detects was NACK, the time location of indicating this sending module to determine at determination module was retransmitted this device-to-device communication service data.

Need to prove, it is different that the HARQ of device-to-device communication transmits residing system, there is difference in the feedback delay that adopts during concrete operations, for example, in the FDD system, feedback delay is 2 or 4 milliseconds, and the two-way time of HARQ, (Round Trip Time, RTT) was identical with the RTT of cellular uplink; Perhaps, feedback delay is 4 milliseconds, and the RTT of HARQ is 12 or 16 milliseconds; Perhaps, feedback delay is 8 milliseconds, and the RTT of HARQ is 16 milliseconds.

Again for example, in the TDD system, feedback delay is determined according to the D2D sub-frame allocation, preferably, the feedback subframe is that the second subscriber equipment receives after this business datum first and satisfies the interval and send subframe more than or equal to 4 D2D, and this interval refers to the interval of the D2D transmission subframe of this business data transmission subframe and this second subscriber equipment; The RTT of HARQ is 10 or 20 milliseconds; Perhaps, the RTT of HARQ is identical with the RTT of cellular uplink.Wherein, this RTT refers to the front once transmission and the time interval of next time transmitting of packet in the HARQ process.

(device embodiment 2)

A kind of control device for device-to-device communication HARQ transmission also is provided in this enforcement.This application of installation is in the network side node of device-to-device communication environment, and this device comprises: sending module is used for sending authorization message and/or HARQ indication to first user equipment; And with lower module one of at least:

Decision-making module one (suitable with the function of above-mentioned the first Retransmission control module): comprise detection sub-module, for detection of the ACK that comes from the second subscriber equipment or NACK feedback information; The decision-making submodule for the testing result of not waiting for this detection sub-module, is indicated this sending module to send authorization message to this first user equipment and is carried out new data transmission to trigger this first user equipment; The recognin module, be used for the transfer of data behavior of identification first user equipment, the mode of this identification is: when this detection sub-module detects this feedback information and is NACK, then identify this communication behavior and ignore the authorization message transmission of this new data transmission for this first user equipment, to this second subscriber equipment retransmission device to the devices communicating business datum, ACK when this detection sub-module detects this feedback information, then identify this communication behavior for this first user equipment according to the indication transmission equipment of this authorization message new business data to devices communicating.

Decision-making module two (suitable with the function of the second Retransmission control module): comprise the semi-continuous scheduling authorization module, send authorization message when being used for initialization or reinitializing semi-continuous scheduling, this authorization message is used for scheduling first user equipment and sends business datum to the second subscriber equipment; The semi-continuous scheduling control module is used for receiving the semi-continuous scheduling releasing request of this first user equipment and/or the transmission of the second subscriber equipment, and discharges the HARQ process of this semi-continuous scheduling.

Decision-making module three (suitable with the function of retransmission control module): comprise detection sub-module, for detection of the ACK that comes from the second subscriber equipment or NACK feedback information; The decision-making submodule, be used for determining according to the testing result of this detection sub-module at least, indicate this sending module to send authorization message and/or HARQ indication to first user equipment, this HARQ indication generates according to the feedback information that this detection module detects, and this authorization message is used for indicating this first user equipment to carry out data re-transmission or new data transmission according to the feedback information that this detection module detects.

Need to prove that when the control device that is used for device-to-device communication HARQ transmission that provides in above-described embodiment and preferred embodiment was applied to the FDD system, feedback delay was 2 or 4 milliseconds, the RTT of HARQ is identical with the RTT of cellular uplink; Perhaps, feedback delay is 4 milliseconds, and the RTT of HARQ is 12 or 16 milliseconds; Perhaps, feedback delay is 8 milliseconds, and the RTT of HARQ is 16 milliseconds.

And the said equipment is when being applied in the TDD system to the control device of devices communicating HARQ transmission, feedback delay is determined according to the D2D sub-frame allocation, preferably, the feedback subframe is that the second subscriber equipment receives after this business datum first and satisfies the interval and send subframe more than or equal to 4 D2D, and this interval refers to the interval of the D2D transmission subframe of this business data transmission subframe and this second subscriber equipment; The RTT of HARQ is 10 or 20 milliseconds; Perhaps, the RTT of HARQ is identical with the RTT of cellular uplink.

(embodiment of the method 1)

A kind of HARQ transmission method of device-to-device communication is provided in the present embodiment, and the method comprises: first user equipment sends business datum according to the indication of authorization message to the second subscriber equipment; The second subscriber equipment receives described business datum, and according to receiving the feedback information that whether correctly sends affirmative acknowledgement ACK or negative response NACK; If described feedback information is NACK, first user equipment retransmits defeated described business datum in the default time to the second subscriber equipment.

Preferably, do not wait for that described feedback information arrives, send authorization message to first user equipment and carry out new data transmission to trigger described first user equipment.The feedback information that described the second subscriber equipment of first user equipment Inspection sends; The authorization message of the described new data transmission of first user equipment Inspection; If feedback information is NACK, first user equipment is ignored this authorization message, retransmits described business datum at Preset Time to the second subscriber equipment; If feedback information is ACK, first user equipment sends the new business data according to the indication of described authorization message.

Perhaps, the feedback information of first user equipment Inspection the second subscriber equipment transmission; If this feedback information is NACK, first user is retransmitted described business datum at Preset Time to the second subscriber equipment; , and judge when semi-continuous scheduling is not released that first user equipment sends the new business data if this feedback information is ACK.

Perhaps, if feedback information is NACK, send authorization message and/or HARQ indication information to first user equipment, trigger first user equipment and retransmit described business datum at Preset Time to the second subscriber equipment; Perhaps trigger first user equipment by this feedback information and retransmit business datum at Preset Time to the second subscriber equipment.

Equally, in the FDD system, feedback delay is 2 or 4 milliseconds, and the RTT of HARQ is identical with the RTT of cellular uplink; Perhaps, feedback delay is 4 milliseconds, and the RTT of HARQ is 12 or 16 milliseconds; Perhaps, feedback delay is 8 milliseconds, and the RTT of HARQ is 16 milliseconds.

In the TDD system, feedback delay is determined according to the D2D sub-frame allocation, preferably, the feedback subframe is that the second subscriber equipment receives after the described business datum first and satisfies the interval and send subframe more than or equal to 4 D2D, and this interval refers to the interval of the D2D transmission subframe of described business data transmission subframe and described the second subscriber equipment; The RTT of HARQ is 10 or 20 milliseconds; Perhaps, the RTT of HARQ is identical with the RTT of cellular uplink.

(concrete embodiment of the method)

Below, each preferred embodiment in, with 3GPP (3rd Generation Partnership Project) Long Term Evolution (Long Term Evolution, referred to as LTE)/LTE-A (LTE-Advanced) system is that background describes in detail to disclosure scheme, but do not consist of this programme do not limited improperly.

The LTE/LTE-A system down link is with OFDM (Orthogonal Frequency Division Multiplexing, referred to as OFDM) technology be the basis, up link then adopts SC-FDMA (Single carrier-Frequency Division Multiplexing Access) multi-access mode.In the OFDM/SC-FDMA system, when the communication resource is-form of bidimensional frequently.For example, for the LTE/LTE-A system, Figure 10 is according to the frame structure schematic diagram of the embodiment of the invention in the LTE/LTE-A system, as shown in figure 10, the communication resource of up link and down link on time orientation all be with radio frames (radio frame, be called for short frame) for the unit division, the length of each frame is 10ms, the subframe (sub-frame) that to comprise 10 length be 1ms, the time slot that it is 0.5ms that each subframe comprises again two length (slot).According to Cyclic Prefix (Cyclic Prefix, abbreviation CP) difference of length, each time slot comprises 7 or 6 OFDM/SC-FDMA symbols, wherein 7 and 6 corresponds respectively to general cyclic prefix (Normal CP) and extended cyclic prefix (Extended CP).

According to the difference of duplex mode, the LTE/LTE-A system is divided into again two patterns: time division duplex (Time-Division Duplex is called for short TDD) system and Frequency Division Duplexing (FDD) (Frequency-Division Duplex is called for short FDD) system.The FDD system is transmitted by the signal that two frequency bands are respectively applied to down link (network side is to terminal) and up link (terminal to network side), and corresponding running time-frequency resource is called descending sub frame and sub-frame of uplink; The signal that the TDD system uses a frequency band to be used for simultaneously uplink downlink transmits, and is distributed in by the signal transmission with the uplink and downlink link and realizes the multiplexing of two links in the different subframes.In the LTE/LTE-A version, different according to the ratio of ascending-descending subframes quantity, the TDD system supports 7 kinds of uplink-downlink configuration (Uplink-downlink configuration), and is as shown in table 1.

The up/down row collocation form table of subframe in the table 1:TDD LTE system

In table 1, D represents descending sub frame, and U represents sub-frame of uplink, and S represents special subframe.The S subframe comprises a part of descending symbol (Downlink Pilot Time Slot; referred to as DwPTS), up symbol (Uplink Pilot Time Slot; referred to as UpPTS) and the up/down row between the protection interval (Guard Period is referred to as GP) of changing.

In the LTE/LTE-A cellular communication system, business datum is at DSCH Downlink Shared Channel (DL-SCH, Downlink Shared Channel) and Uplink Shared Channel (UL-SCH, Uplink Shared Channel) transmission in, Physical Downlink Shared Channel (PDSCH corresponding to physical layer, Physical Downlink Shared Channel) and Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel).And, for the transfer of data in the shared channel, need corresponding authorization message to indicate, the content of indication comprises resource distribution location, modulation coding mode, power control information, the information that MIMO (Multi-In Multi-Out) is relevant etc.In cellular communication, above-mentioned authorization message sends by Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) with the form of DCI (Downlink Control Information).

Simultaneously, in the LTE/LTE-A cellular communication, support the HARQ transmission.Concrete, up link adopts synchronous HARQ transmission means (synchronous HARQ), and down link adopts asynchronous HARQ transmission means (asynchronous HARQ).Refer to that synchronously for specific HARQ process (HARQ process), retransmit and occur in the known moment, asynchronous HARQ means that then re-transmission can occur at any time for specific HARQ process.

Embodiment 1:(HARQ mode 1, the process identical with cellular communication, feedback and mandate send simultaneously)

A kind of HARQ transmission method of device-to-device communication is provided in the present embodiment, and the method comprises: first user equipment sends business datum according to the indication of authorization message to the second subscriber equipment; The second subscriber equipment receives described business datum, and according to receiving the feedback information that whether correctly sends affirmative acknowledgement ACK or negative response NACK; If this feedback information is NACK, first user equipment retransmits defeated described business datum in the default time to the second subscriber equipment.

In the present embodiment, do not wait for the arrival of feedback information, namely send authorization message to first user equipment and carry out new data transmission to trigger it.The feedback information that first user equipment Inspection the second subscriber equipment sends and the authorization message of this new data transmission.If feedback information is NACK, then first user equipment is ignored this authorization message, retransmits above-mentioned business datum at Preset Time to the second subscriber equipment; If feedback information is ACK, then first user equipment sends the new business data according to the indication of the authorization message of this new data transmission.

Figure 11 is the flow chart of the HARQ transmission method of according to the preferred embodiment of the invention device-to-device communication, and as shown in figure 11, this flow process comprises the steps:

Step S1102, first user equipment sends business datum to the second subscriber equipment;

Step S1104, the second subscriber equipment sends feedback information to first user equipment and network side node;

Step S1106, network side node do not wait for feedback information, send authorization message to first user equipment, need to prove that there are not strict sequencing in this step and step S1104;

Step S1108, first user equipment judge whether to carry out business datum according to feedback information and retransmit, if so, and execution in step S1102, otherwise, execution in step S1110;

Step S1110, first user equipment sends new business datum according to authorization message to the second subscriber equipment.

At first describe as an example of the FDD system example, suppose that UE uses sub-frame of uplink to carry out D2D communication.Figure 12 uses sub-frame of uplink to carry out the schematic diagram one of the HARQ transmission of D2D communication in the FDD system according to the embodiment of the invention, and as shown in figure 12, a lattice represents a subframe, Expression belongs to the subframe of a HARQ process, and the numeral in the grid is the subframe numbering, figure 12 illustrates 4 radio frames.UE1 represents first user equipment, and UE2 represents the second subscriber equipment, and NN represents the network side node (Network Node) that communication is controlled to D2D, for example can be eNB.

In the present embodiment, when UE1 (for example judges need to send business datum to D2D Correspondent Node user UE2 in the subframe 8 of radio frames 4n the time, can carry out the transmission of business datum at the subframe 4 transmission authorization message scheduling UE1 of radio frames 4n by eNB, perhaps UE1 is triggered and carries out the re-transmission of D2D business datum), send business datum in subframe 8, whether UE2 receives this business datum, and correct according to receiving, and feeds back corresponding response message ACK/NACK.UE1 is after subframe 8 sends business datum, and then the 4th subframe after this subframe detects corresponding feedback information.Simultaneously, when the data that determine UE1 also do not send, the 4th subframe 2 that subframe is radio frames 4n+1 after sending business datum, network node is not waited for the arrival of UE2 feedback information, namely send authorization message to UE1, scheduling UE1 sends the new business data in the 4th follow-up subframe.

For UE1, if detect ACK, then UE1 thinks that business data transmission is successful, and whether detection has scheduling, and it carries out the authorization message of new business transfer of data; If detect NACK, 4th subframe of UE1 behind this feedback information then, namely the subframe 6 of radio frames 4n+1 is retransmitted described business datum, and ignores the authorization message that network node sends in the subframe 2 of radio frames 4n+1.The described authorization message of ignoring refers to, is NACK if UE1 detects feedback information, can not carry out the detection of authorization message again; Perhaps, even the authorization message of detecting, UE1 can not carry out according to the indication of authorization message the transmission of new data yet.

For the network node of control D2D communication, also can detect the response message of UE2 feedback.Because the arrival that network node is not waited for the UE2 feedback information namely sends authorization message to UE1, so network node is when detecting the response message of UE2 feedback, and authorization message is sent.If the response message that network node detects is ACK, thinks that then UE1 is successful to the business datum of UE2 transmission, and think that UE1 can send the new business data according to the authorization message that the subframe 2 at radio frames 4n+1 detect in the subframe 6 of radio frames 4n+1; Otherwise network node thinks that UE1 can retransmit business datums in the subframe 6 of radio frames 4n+1, and retransmits described scheduling authorization information to UE1 in follow-up transmission opportunity, dispatches it and carries out the new business transmission.

The below describes as an example of the TDD system example, Figure 13 uses for 1 time sub-frame of uplink to carry out the schematic diagram one of the HARQ transmission of D2D communication according to the uplink-downlink configuration of the embodiment of the invention in the TDD system, as shown in figure 13, TDD uplink-downlink configuration 1 time, suppose that UE uses sub-frame of uplink to carry out D2D communication HARQ transmission.In Figure 13, D, S and U represent respectively descending sub frame, special subframe and the sub-frame of uplink of cellular communication, and all the other each abbreviations are identical with above-mentioned Figure 12 with the implication of symbol.The processing procedure of HARQ transfer process and user equipment side, network side is also basic identical, repeats no more.

Take the TDD system as example, Figure 14 uses for 6 times sub-frame of uplink to carry out the schematic diagram one of the HARQ transmission of D2D communication according to the uplink-downlink configuration of the embodiment of the invention in the TDD system, as shown in figure 14, TDD uplink-downlink configuration 6 times, suppose that UE uses sub-frame of uplink to carry out D2D communication HARQ transmission.In Figure 14, D, S and U represent respectively descending sub frame, special subframe and the sub-frame of uplink of cellular communication, and the implication of all the other each abbreviations and symbol is identical with above-mentioned Figure 12's.The processing procedure of HARQ transfer process and user equipment side, network side is also basic identical, repeats no more.

More preferably, UE can be set and carry out the D2D maximum retransmission in when communication.For example, when the response message that detects UE2 feedback as UE1 is NACK, judge last time whether transmission had reached maximum retransmission; If reach maximum retransmission, then the UE1 HARQ that no longer carries out this business datum retransmits, and after detecting scheduling it carries out the authorization message of new business transfer of data, sends the new business data according to this authorization message.

Equally, when UE being set carrying out the maximum retransmission in D2D when communication, the network node of control D2D communication also can carry out the judgement of number of retransmissions, namely when detecting NACK, judges last time whether transmission had reached maximum retransmission; If reach maximum retransmission, think that then UE1 no longer carries out the HARQ re-transmission of this business datum, but can send the new business data according to the indication of this new business data grant information.

In the present embodiment, UE2 sends the feedback response message to UE1 and network node simultaneously.This feedback response message can only send once, UE1 and network node all go to detect, for example send by the PUCCH resource, perhaps send ACK/NACK multiplexing method in PUSCH resource when multiplexing mode can be with reference to cellular communication by multiplexing feedback information in the D2D Traffic Channel that UE2 sends; Also can send respectively, for example send this feedback response message by the PUCCH resource to network node, send this feedback response message by the D2D communication resource to UE1.

In the present embodiment, in the FDD system, the sequential that the feedback response message sends can adopt the principle of "+4 ", and namely subscriber equipment sends corresponding feedback response message at subframe k+4 after subframe k receives the D2D business datum; In the TDD system, the sequential that the feedback response message sends is determined by D2D process or D2D sub-frame configuration in conjunction with receiving terminal processing delay and D2D communicating pair UE, for example, subscriber equipment sends subframe at first D2D that satisfies m 〉=4 of this subscriber equipment and sends this feedback response message after subframe k receives the D2D business datum.For example, the subframe 3 of radio frames 4n+1 shown in Figure 13 can be that the D2D of UE2 sends subframe, and UE2 sends the feedback response message in this subframe 3; The subframe 3 of radio frames 4n+1 shown in Figure 14 can be that the D2D of UE2 sends subframe, and UE2 sends the feedback response message in this subframe 3.

In the present embodiment, the mandate sequential of D2D business data transmission can be continued to use the principle of cellular uplink communication, namely adopts the principle of "+4 " in the FDD system, according to different uplink-downlink configuration definition is arranged respectively in the TDD system, can with reference to related protocol, repeat no more.

In the present embodiment, guaranteed that the HARQ process of D2D communication is identical with cellular communication, namely in the FDD system, RTT is 8ms during the HARQ transmission, then relevant with concrete uplink-downlink configuration in the TDD system, routine TDD uplink-downlink configuration described above 1 time, the RTT during D2D communication HARQ transmission is 10ms.The impact that introducing D2D communication can bring D2D signal post in cellular communication system like this drops to minimum.

Embodiment 2:(HARQ mode 2,8ms process, SPS scheduling)

Provide in the present embodiment a kind of HARQ transmission method of device-to-device communication to address the above problem, having comprised: first user equipment sends business datum according to the indication of authorization message to the second subscriber equipment; The second subscriber equipment receives above-mentioned business datum, and according to receiving the feedback information that whether correctly sends affirmative acknowledgement ACK or negative response NACK; If this feedback information is NACK, first user equipment retransmits defeated above-mentioned business datum in the default time to the second subscriber equipment.

Originally executing in the example response feedback information that first user equipment Inspection the second subscriber equipment sends; If this feedback information is NACK, then first user is retransmitted described business datum at Preset Time to the second subscriber equipment; If this feedback information is ACK, and first user equipment sends the new business data when judging that semi-continuous scheduling is not released.It also is the mode of the device-to-device communication employing semi-continuous scheduling (Semi-Persistent Scheduling) in this example.

Take the FDD system as example, Figure 15 is the schematic diagram two that uses sub-frame of uplink to carry out the HARQ transmission of D2D communication in the FDD system according to the embodiment of the invention, as shown in figure 15, supposes that UE uses sub-frame of uplink to carry out D2D communication HARQ transmission.Each symbol is identical with implication and Figure 12 of abbreviation among the figure.

In this embodiment, (for example can send the authorization message initialization or reinitialize the HARQ transmission of semi-continuous scheduling in the subframe 4 of radio frames by eNB when UE1 judges need to send business datum to D2D Correspondent Node user UE2 in the subframe 8 of radio frames 4n the time, perhaps UE1 judges that the HARQ process of this semi-continuous scheduling also is not released), send business datum in subframe 8, UE2 receives this business datum, and whether correct according to receiving, feed back corresponding response message ACK/NACK.UE1 is after subframe 8 sends business datum, and then the 4th subframe after this subframe detects corresponding feedback information.

For UE1, if detect ACK, then UE1 thinks business data transmission success, and the process of judging this semi-continuous scheduling continues to send new business data (subframe 6 of Figure 15 radio frames 4n+1) when not being released; If detect NACK, 4th subframe of UE1 behind this feedback information then, namely the subframe 6 of radio frames 4n+1 is retransmitted described business datum.

More preferably, UE can be set and carry out the D2D maximum retransmission in when communication.For example, when the response message that detects UE2 feedback as UE1 is NACK, judge last time whether transmission had reached maximum retransmission; If reach maximum retransmission, then the UE1 HARQ that no longer carries out this business datum retransmits, and after detecting scheduling it carries out the authorization message of new business transfer of data, sends the new business data according to this authorization message.

Equally, when UE being set carrying out the maximum retransmission in D2D when communication, the network node of control D2D communication also can carry out the judgement of number of retransmissions, namely when detecting NACK, judges last time whether transmission had reached maximum retransmission; If reach maximum retransmission, think that then UE1 no longer carries out the HARQ re-transmission of this business datum, but can send the new business data according to the indication of this new business data grant information.

For the network node of control D2D communication, after the transmission of semi-continuous scheduling is dispatched, need to judge whether this is released for the HARQ process of this semi-continuous scheduling.The foundation of judging can be that UE1 and/or UE2 send releasing request.For example, UE1 sends releasing request to network node after judging that business datum has been sent completely; Perhaps, UE2 sends releasing request to network node after judging that business datum has been sent completely, and the foundation that UE2 judges can be that UE1 sends several sky packets continuously.

In the present embodiment, the feedback response message that UE2 sends to UE1, can send by the PUCCH resource, perhaps send by multiplexing feedback information in the D2D Traffic Channel that sends at UE2, ACK/NACK multiplexing method in PUSCH resource when multiplexing mode can be with reference to cellular communication.

In the present embodiment, in the FDD system, the sequential that the feedback response message sends can adopt the principle of "+4 ", and namely subscriber equipment sends corresponding feedback response message at subframe k+4 after subframe k receives the D2D business datum; In the TDD system, the sequential that the feedback response message sends is determined by D2D process or D2D sub-frame configuration in conjunction with receiving terminal processing delay and D2D communicating pair UE, for example, subscriber equipment sends subframe at first D2D that satisfies m 〉=4 of this subscriber equipment and sends this feedback response message after subframe k receives the D2D business datum.

In the present embodiment, the mandate sequential of D2D business data transmission can be continued to use the authorized transmissions sequential of cellular uplink communication, namely adopts the principle of "+4 " in the FDD system, according to different uplink-downlink configuration definition is arranged respectively in the TDD system, can with reference to related protocol, repeat no more.

In the present embodiment, guaranteed that the HARQ process of D2D communication is identical with cellular communication, namely in the FDD system, RTT is 8ms during the HARQ transmission, then relevant with concrete uplink-downlink configuration in the TDD system, routine TDD uplink-downlink configuration described above 1 time, RTT is 10ms during D2D communication HARQ transmission.The impact that introducing D2D communication can bring D2D signal post in cellular communication system like this drops to minimum.

Embodiment 3:(HARQ mode 3, step by step, 8/12/16ms process)

A kind of HARQ transmission method of device-to-device communication is provided in the present embodiment, and the method comprises: first user equipment sends business datum according to the indication of authorization message to the second subscriber equipment; Described the second subscriber equipment receives described business datum, and according to receiving the feedback information that whether correctly sends affirmative acknowledgement ACK or negative response NACK; If described feedback information is NACK, first user equipment retransmits defeated described business datum in the default time to the second subscriber equipment.

In the present embodiment, if feedback information is NACK, then send authorization message and/or HARQ indication information to first user equipment, trigger described first user equipment and retransmit described business datum at Preset Time to the second subscriber equipment.

D2D in the LTE/LTE-A system communicates by letter as example, and the flow process of HARQ transmission can be: D2D communication controller node scheduling first user equipment is to the second user device transmissions business datum; First user equipment is to the second user device transmissions business datum; The second user device to receive service data, and whether correctly feed back corresponding response message according to detecting; The D2D communication controller node detects response message, if ACK thinks that then this business data transmission is successful; If NACK then triggers first user equipment and retransmits this business datum in the default time to the second subscriber equipment.The D2D communication controller node can be network side node, for example eNB.The signaling that triggers the first user device resends can be the authorization message that the D2D communication controller node sends, and also can be HARQ indication (HARQ Indicator, HI) information.

Embodiment 3 sub-examples 1:

Take the FDD system as example, Figure 16 is the schematic diagram three that uses sub-frame of uplink to carry out the HARQ transmission of D2D communication in the FDD system according to the embodiment of the invention, as shown in figure 16, supposes that UE uses sub-frame of uplink to carry out D2D communication HARQ transmission.Each abbreviation is identical with example 1 with the implication of symbol among the figure.

More preferably, in the present embodiment, the response feedback time delay of business datum can't be fed back according to the feedback delay of LTE cellular communication, can reset this feedback delay, and for example being set to feedback delay is 2ms.The authorized transmissions time delay then can be continued to use the rule of cellular communication, i.e. 4ms.

In the present embodiment, guaranteed that the HARQ process of D2D communication is identical with cellular communication, namely in the FDD system, RTT is 8ms during the HARQ transmission.The impact that introducing D2D communication can bring D2D signal post in cellular communication system like this drops to minimum.(but, the realization for subscriber equipment and network node may bring larger challenge: the feedback delay in the existing system and retransfer scheduling time delay minimum all are 4ms, reduce these time delays and realize that in system impact is larger.)

Embodiment 3 sub-examples 2:

Under the HARQ of present embodiment flow process, can consider the HARQ transmission method under another HARQ sequential.

Take the FDD system as example, Figure 17 is according to the embodiment of the invention another schematic diagram three that uses sub-frame of uplink to carry out the HARQ transmission of D2D communication in the FDD system, as shown in figure 17, supposes that UE uses sub-frame of uplink to carry out D2D communication HARQ transmission.Among the figure Expression belongs to the subframe of a Cellular Networks HARQ process, and its implication with each abbreviation and symbol is identical with example 1.

More preferably, in this example, the response feedback time delay of business datum can be continued to use the feedback delay rule of LTE cellular communication, and namely feedback delay adopts the principle of "+4 " in the FDD system, and namely feedback delay is 4ms.The authorized transmissions sequential also can be continued to use the rule of cellular communication, namely is similarly "+4 " principle in the FDD system.As shown in figure 17.

In the present embodiment, the HARQ process of D2D communication is different from cellular communication, and for example, in the example of Figure 17, RTT is 12ms during the HARQ transmission, and RTT is 8ms when HARQ transmits in the FDD cellular system.The transmission of such D2D HARQ process can take the HARQ process of two cellular communications.But, because D2D communication may be two-way communication, namely the communicating pair subscriber equipment all can send business datum to the other user's equipment, thereby can distribute to the subframe of above-mentioned two honeycomb HARQ processes respectively according to D2D HARQ process two links of D2D.For example, in Figure 17, two honeycomb HARQ processes by D2D communication takies can form the subframe 8 of 3 D2D HARQ process: radio frames 4n, the subframe 0 of radio frames 4n+2 and the subframe 2 of radio frames 4n+3 and belong to a HARQ process; The subframe 4 of radio frames 4n, the subframe 6 of radio frames 4n+1 and the subframe 8 of radio frames 4n+2 belong to a HARQ process; The subframe 0 of radio frames 4n, the subframe 6 of the subframe 2 of radio frames 4n+1, the subframe 4 of radio frames 4n+2 and radio frames 4n+3 belongs to a HARQ process.Be used for UE1 such as first D2D HARQ process and transmit to UE2, second D2D HARQ process is used for UE2 to be transmitted to UE1, etc., repeat no more.

Embodiment 3 sub-examples 3:

Under present embodiment HARQ flow process, can consider the HARQ transmission method under another HARQ sequential.

Take the FDD system as example, Figure 18 is according to the embodiment of the invention another schematic diagram three that uses sub-frame of uplink to carry out the HARQ transmission of D2D communication in the FDD system, as shown in figure 18, supposes that UE uses sub-frame of uplink to carry out D2D communication HARQ transmission.Each abbreviation is identical with example 1 with the implication of symbol among the figure.

Take the TDD system as example, Figure 19 is the schematic diagram three that uses for 3 times sub-frame of uplink to carry out the HARQ transmission of D2D communication in uplink-downlink configuration in the TDD system according to the embodiment of the invention, as shown in figure 19, supposes that UE uses sub-frame of uplink to carry out D2D communication.HARQ transmission under the TDD uplink-downlink configuration 3.Each abbreviation is identical with example 1 with the implication of symbol among the figure.

Figure 20 is the schematic diagram three that uses for 6 times sub-frame of uplink to carry out the HARQ transmission of D2D communication in uplink-downlink configuration in the TDD system according to the embodiment of the invention, is the HARQ transmission under the TDD uplink-downlink configuration 6 as shown in figure 20.Each abbreviation is identical with example 1 with the implication of symbol among the figure.

In the present embodiment, the HARQ process of D2D communication is different from cellular communication, and for example, in the example of the FDD of Figure 18 system, RTT is 16ms during the HARQ transmission, is to retransmit in the FDD cellular communication and 2 times of the interval of first biography.The transmission of such D2D HARQ process can take in the HARQ process of a cellular communication subframe of half.But, because D2D communication may be two-way communication, be that the communicating pair subscriber equipment all can send business datum to the other user's equipment, thereby can be used for transfer of data to second half subframe in subframe corresponding to an above-mentioned honeycomb HARQ process to what D2D communicated by letter to end user device as a D2D HARQ course allocation.This execution mode is applicable to FDD system and TDD system simultaneously.

More preferably, the response feedback time delay of described business datum can be identical with cellular communication.For example, in the FDD system, after subframe k receives business datum, transmit corresponding response feedback ACK/NACK information at subframe k+4, such as the transmission of feedback information of Figure 18.

Perhaps, the response feedback time delay of described business datum can be determined that by the configuration of D2D subframe or process namely this feedback response message sends in the subframe at the D2D of the receiving terminal subscriber equipment of described business datum and transmits.For example, in Figure 18, if the subframe of radio frames 4,n+1 6 is for the D2D subframe of UE2 to the UE1 transmission, the business datum that then receives in the subframe 8 for radio frames 4n, UE2 can transmit corresponding feedback response message in the subframe 6 of radio frames 4n+1, ACK/NACK multiplexing transmission method in PUSCH when the method for transmission can be with reference to cellular communication.In the FDD system, can be summarized as: the response feedback information of subframe k, corresponding to the business datum reception of subframe k-8; If k detects NACK in subframe, and/or, detect the authorization message that scheduling retransmits at subframe k+4, then carry out the re-transmission of business datum at subframe k+8.D2D in TDD communicates by letter in like manner, such as Figure 19 and shown in Figure 20.

More preferably, when described feedback response message transmits in D2D transmission subframe, the transmit leg subscriber equipment of described business datum also can detect described feedback response message, the network node of namely controlling D2D communication detects the feedback response message to be NACK and to judge when needing to retransmit, can send authorization message triggering UE1 and carry out the re-transmission of business datum, also can not send authorization message, retransmit but trigger UE1 by this feedback response message.

In another embodiment, also provide a kind of software, this software be used for to be carried out the technical scheme that above-described embodiment and preferred embodiment are described.

In another embodiment, also provide a kind of storage medium, stored above-mentioned software in this storage medium, this storage medium includes but not limited to CD, floppy disk, hard disk, scratch pad memory etc.

Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (22)

1. a mixed automatic retransfer request HARQ transmission method is characterized in that, is applied to device-to-device communication, comprising:
First user equipment sends business datum to the second subscriber equipment;
Described first user equipment Inspection response feedback information and/or authorization message, wherein, described feedback information is used for representing whether described the second subscriber equipment receives described business datum correct;
When representing that described the second subscriber equipment is incorrect, described response feedback information receives described business datum and/or when judging that described authorization message is used for dispatching described first user equipment and carries out described business datum when retransmitting, described first user equipment retransmits described business datum according to RTT two-way time that presets to described the second subscriber equipment.
2. method according to claim 1 is characterized in that, described first user equipment sends described business datum to described the second subscriber equipment and comprises:
Described first user equipment Inspection is from the described authorization message of network side node;
When described first user equipment judged that described authorization message is used for dispatching described first user equipment and sends described business datum, described first user equipment sent described business datum to described the second subscriber equipment.
3. method according to claim 1, it is characterized in that, in the situation of the described response feedback information that described the second subscriber equipment of described first user equipment Inspection sends, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment and comprises
Represent that in described response feedback information described the second subscriber equipment does not have correctly to receive in the situation of described business datum, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment.
4. method according to claim 1, it is characterized in that, in the situation of the described response feedback information that described the second subscriber equipment of described first user equipment Inspection sends, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment and comprises
Described first user equipment judges whether the HARQ process of semi-continuous scheduling is released;
Represent the described business datum of the incorrect reception of described the second subscriber equipment in described response feedback information, and the HARQ process of described semi-continuous scheduling do not have in the d/d situation, and described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment.
5. according to claim 3 or 4 described methods, it is characterized in that,
In FDD system, described the second subscriber equipment is not more than the duration of 4 subframes from receiving described business datum to the feedback delay that sends described response feedback information to described first user equipment, the RTT of described HARQ transmission is the duration of 8 subframes; Or described the second subscriber equipment is not more than the duration of 8 subframes from receiving described business datum to the feedback delay that sends described response feedback information to described first user equipment, and described RTT is the duration of 16 subframes;
In TDD system, the feedback subframe that described the second subscriber equipment sends described response feedback information is that first of described the second subscriber equipment satisfies sub-frame interval and send subframe more than or equal to 4 device-to-device communication, described RTT is the duration of 10 subframes or identical with the RTT of cellular uplink, wherein, described sub-frame interval is that described first user equipment sends the subframe of described business datum and the interval that described the second user sends the subframe of described response feedback information to described the second subscriber equipment.
6. method according to claim 4, it is characterized in that, also comprise: when judging that described first user equipment is finished to the described business datum of described the second user device transmissions, described first user equipment or described the second subscriber equipment send the request that discharges described semi-continuous scheduling to network side node.
7. method according to claim 1 is characterized in that,
In the situation of the response feedback information that described the second subscriber equipment of described first user equipment Inspection or network side node send, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment and comprises, represent the described business datum of the incorrect reception of described the second subscriber equipment in described response feedback information, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment; And/or,
In the situation of the described authorization message that the described network side node of described first user equipment Inspection sends, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment and comprises, judging that described authorization message is used for dispatching described first user equipment and carries out described business datum when retransmitting, described first user equipment retransmits described business datum according to default RTT to described the second subscriber equipment.
8. method according to claim 7 is characterized in that,
In the situation of the response feedback information that described the second subscriber equipment of described first user equipment Inspection or network side node send, before the described response feedback information of described first user equipment Inspection, also comprise, described the second subscriber equipment receives described business datum, and according to receiving whether correctly send described response feedback information to described network side node, described network side node is transmitted to described first user equipment with described response feedback information; And/or,
In the situation of the described authorization message that the described network side node of described first user equipment Inspection sends, before the described authorization message of described first user equipment Inspection, also comprise, when described response feedback information represented the described business datum of the incorrect reception of described the second subscriber equipment, described network side node sent for dispatching described first user equipment to described first user equipment and carries out the authorization message that described business datum retransmits.
9. method according to claim 7 is characterized in that,
In FDD system, described the second subscriber equipment is not more than the duration of 2 subframes to the feedback delay that sends described response feedback information to described network side node from receiving described business datum, described network side node is not more than the duration of 2 subframes from receiving described response feedback information to the feedback delay that sends described response feedback information and/or authorization message to described first user equipment, described RTT is the duration of 8 subframes; Or described the second subscriber equipment is not more than the duration of 4 subframes to the feedback delay that sends described response feedback information to described network side node from receiving described business datum, described network side node is from receiving described response feedback information to the duration that is not more than 4 subframes to the described response feedback information of described first user device forwards or the feedback delay that sends described authorization message, and described RTT is the duration of 12 subframes or the duration of 16 subframes; Or described the second subscriber equipment is not more than the duration of 8 subframes to the feedback delay that sends described response feedback information from receiving described business datum, described network side node is from receiving described response feedback information to the duration that is not more than 4 subframes to the described response feedback information of described first user device forwards or the feedback delay that sends described authorization message, and described RTT is the duration of 16 subframes;
In TDD system, the feedback subframe that described the second subscriber equipment sends described response feedback information satisfies sub-frame interval more than or equal to first of 4 sub-frame of uplink or described the second subscriber equipment and sends subframe more than or equal to 4 device-to-device communication for first satisfies the interval, described RTT is the duration of 20 subframes, or continuous two RTT sums of cellular uplink, wherein, described sub-frame interval is that described first user equipment sends the subframe of described business datum and the interval that described the second user sends the subframe of described response feedback information to described the second subscriber equipment.
10. a mixed automatic retransfer request HARQ transmission method is characterized in that, is applied to device-to-device communication, comprising:
Network side node receives the response feedback information from the second subscriber equipment, and wherein, described response feedback information represents whether described the second subscriber equipment receives first user equipment transmission business datum correct;
Represent that in described response feedback information described the second subscriber equipment does not have correctly to receive in the situation of described business datum, described network side node confirms that described first user equipment need to retransmit described business datum to described the second subscriber equipment according to default RTT two-way time.
11. method according to claim 10 is characterized in that, described network side node also comprises before confirming that described first user equipment need to retransmit described business datum to described the second subscriber equipment according to default RTT two-way time:
Described network side node is not waited for the described response feedback information that described the second subscriber equipment sends, and sends the authorization message that is used for scheduling new business transfer of data to described first user equipment.
12. method according to claim 10, it is characterized in that, confirm that at described network side node described first user equipment represents in described response feedback information that described the second subscriber equipment does not have correctly to receive in the situation of described business datum and need to comprise also that after described the second subscriber equipment retransmits described business datum described network side node indicates described first user equipment to retransmit described business datum to described the second subscriber equipment according to default RTT.
13. method according to claim 12 is characterized in that, described network side node by following information one of at least the described first user equipment of indication retransmit described business datum to described the second subscriber equipment: described response feedback information, authorization message.
14. a mixed automatic retransfer request HARQ transmitting device is characterized in that, is applied to be in the first user equipment of device-to-device communication, comprising:
Sending module is used for sending business datum to the second subscriber equipment;
Detection module, for detection of response feedback information and/or authorization message, wherein, described response feedback information is used for representing whether described the second subscriber equipment receives described business datum correct;
Retransmission module, be used for receiving described business datum and/or when judging that described authorization message is used for dispatching described first user equipment and carries out described business datum re-transmission, indicating described sending module to retransmit described business datum according to RTT two-way time that presets to described the second subscriber equipment when described response feedback information represents that described the second subscriber equipment is incorrect.
15. device according to claim 14, it is characterized in that, the described response feedback information that described detection module also sends for detection of described the second subscriber equipment, described retransmission module also comprises, the first Retransmission control module, be used for representing that in described response feedback information described the second subscriber equipment does not have correctly to receive in the situation of described business datum, indicate described sending module to retransmit described business datum according to default RTT to described the second subscriber equipment.
16. device according to claim 14 is characterized in that, the described response feedback information that described detection module also sends for detection of described the second subscriber equipment, and described retransmission module comprises,
Judge module is used for judging whether the HARQ process of semi-continuous scheduling is released;
The second Retransmission control module, be used for representing the described business datum of the incorrect reception of described the second subscriber equipment in described response feedback information, and described semi-continuous scheduling HARQ process do not have in the d/d situation, indicates described sending module to retransmit described business datum according to default RTT to described the second subscriber equipment.
17. each described device in 16 is characterized in that according to claim 14,
The described response feedback information that described detection module also sends for detection of described the second subscriber equipment or network side node, described retransmission module also is used for indicating described sending module to retransmit described business datum according to default RTT to described the second subscriber equipment when described response feedback information represents the described business datum of the incorrect reception of described the second subscriber equipment; And/or,
The described authorization message that described detection module also sends for detection of described network side node, described retransmission module also is used for being used for dispatching described first user equipment in described authorization message and carries out described business datum when retransmitting, and indicates described sending module to retransmit described business datum according to default RTT to described the second subscriber equipment.
18. a mixed automatic retransfer request HARQ transmitting device is characterized in that, is applied to comprise in the network side node of device-to-device communication:
Receiver module is used for receiving the response feedback information from the second subscriber equipment, and wherein, described response feedback information represents whether described the second subscriber equipment receives first user equipment transmission business datum correct;
Confirm module, be used for representing that in described response feedback information described the second subscriber equipment does not have correctly to receive in the situation of described business datum, confirm that described first user equipment need to retransmit described business datum to described the second subscriber equipment according to default RTT two-way time.
19. device according to claim 18, it is characterized in that, also comprise the retransmission control module, be used for confirming that in described affirmation module described response feedback information represents that described the second subscriber equipment not have correctly to receive in the situation of described business datum and need to according to the RTT that presets after described the second subscriber equipment retransmits described business datum, indicate described first user equipment to retransmit described business datum to described the second subscriber equipment.
20. device according to claim 18, it is characterized in that, also comprise the second sending module, be used for to the described response feedback information of described first user device forwards, and/or when judging the described business datum of the incorrect reception of described the second subscriber equipment, sending authorization message to described first user equipment, described authorization message is used for dispatching described first user equipment and retransmits described business datum.
21. each described device in 20 according to claim 18, it is characterized in that, also comprise the 3rd sending module, be used for not waiting for the described response feedback information of described the second subscriber equipment transmission, send the authorization message that is used for scheduling new business transfer of data to described first user equipment.
22. a mixed automatic retransfer request HARQ transmission system is characterized in that, comprises each described HARQ transmitting device in the claim 14 to 17, also comprises each described HARQ transmitting device in the claim 18 to 21.
CN2012100827176A 2012-03-26 2012-03-26 Transmission method, device and system for hybrid automatic repeat request CN103368706A (en)

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