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CN105591727B - A kind of D2D unicast communication method and terminal - Google Patents

A kind of D2D unicast communication method and terminal Download PDF

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Publication number
CN105591727B
CN105591727B CN201410572914.5A CN201410572914A CN105591727B CN 105591727 B CN105591727 B CN 105591727B CN 201410572914 A CN201410572914 A CN 201410572914A CN 105591727 B CN105591727 B CN 105591727B
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China
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data volume
transmission
data
subframe
radio frames
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CN201410572914.5A
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CN105591727A (en
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鲁智
陈哲
池连刚
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Putian Information Technology Co Ltd
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Putian Information Technology Co Ltd
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Abstract

The present invention provides a kind of D2D unicast communication method, UE1 determines the configuration of the front and back transmission direction of 10 subframes in radio frames R according to the data volume of fl transmission between UE1 and UE2 and reverse transfers;When the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 is in the threshold interval of setting, UE1 selects the configuration of the front and back transmission direction of 10 subframes in radio frames R corresponding with the threshold interval of the setting, carries out data transmission with the UE2.The invention enables sending UE and receiving UE and can be configured according to transmission direction before and after the suitable subframe of the data volume size of downstream transmission selection, resource is efficiently utilized, the wasting of resources is avoided.

Description

A kind of D2D unicast communication method and terminal
Technical field
The present invention relates to fields of communication technology, and in particular to a kind of D2D unicast communication method and terminal.
Background technique
D2D technology is the application scenarios being closer for transmitting terminal UE and receiving end UE, two UE being closer it Between can directly transmit communication data, it is no longer necessary to network side is relayed.The negative of network side can be reduced by introducing D2D technology It carries, reduces the propagation delay time of data.Additionally due to two UE are closer, the transmission power of UE, reduction pair can be effectively reduced Energy-efficient purpose is realized in the interference of other users simultaneously.
For D2D communication using half-duplex mechanism, i.e., cannot be received simultaneously while a UE sends data another The data of a UE.The outer D2D communication of network, two UE send and receive needs mutually association between UE after obtaining available resource Quotient completes.
ENB is that UE is configured with 7 kinds of different uplink and downlink proportions to be suitble to different uplink and downlink business to need in LTE Rel-8 It asks, as shown in table 1, D indicates that downlink subframe, U indicate that sub-frame of uplink, S indicate special subframe.
1 eNB of table is the different uplink and downlink proportion of 7 kinds of UE configuration
In existing system, data are sended and received fully according to the instruction of eNB by eNB United Dispatching UE, i.e. UE, due to TDD system is typically larger than upstream traffic in view of downlink traffic, thus according to different downlink traffics determined 7 kinds not Same uplink and downlink proportion, downlink are up to 9 subframes, and uplink is up to 6 subframes.For being communicated between D2D system UE, between UE Relationship be it is reciprocity, i.e., a certain moment UE1 may to UE2 data volume it is big, another moment UE2 may give UE1 data volume Greatly.If configured according to current TDD ascending-descending subframes, it is UE2 transmission data that UE1, which is up to 9 subframes, but UE2 Be up to 6 subframes are that UE1 transmits data, accordingly even when UE1 does not have data to be transferred to UE2, it is still desirable to 4 subframes are vacated, This 4 subframes cannot be used for UE2 to the communication of UE1, and existing uplink and downlink proportion also results in money not only for UE2 unfairness The waste in source.
Summary of the invention
For the defects in the prior art, the present invention provides a kind of D2D unicast communication method and terminal so that send UE and Receiving UE can select transmission direction before and after suitable subframe to configure according to the data volume size of preceding reverse transfers, effectively utilize Resource, avoids the wasting of resources.
In a first aspect, the present invention provides a kind of D2D unicast communication method, comprising:
UE1 determines in radio frames R 10 subframes according to the data volume of fl transmission between UE1 and UE2 and reverse transfers The configuration of front and back transmission direction;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 is in the threshold zone of setting When interior, UE1 selects the configuration of the front and back transmission direction of 10 subframes in radio frames R corresponding with the threshold interval of the setting, Carry out data transmission with the UE2.
Preferably, it is described when between UE1 and UE2 the ratio of the data volume of the data volume and reverse transfers of fl transmission setting When in fixed threshold interval, UE1 selects the front and back transmission side of 10 subframes in radio frames R corresponding with the threshold interval of the setting To configuration include:
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the first threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 9F:1B;
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the second threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 8F:2B;
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting third threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 7F:3B;
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the 4th threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 6F:4B;
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the 5th threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 5F:5B;
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the 6th threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 4F:6B;
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the 7th threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 3F:7B;
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the 8th threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 1F:9B;
Wherein, it is fl transmission that UE1, which sends data to UE2, in D2D system, and it is reverse transfers that UE2, which sends data to UE1, The radio frames R includes 10 subframe { R0,R1,R2,R3,R4,R5,R6,R7,R8,R9}。
Wherein, the meaning of the nF:mB is n fl transmission subframe, m reverse transfers subframe.
Preferably, the method also includes:
To feedback subframe R after UE1 determination is fixedxWith fixed feed-forward subframe Ry, 0≤x≤9,0≤y≤9, x ≠ y;
When UE1 receives the data that UE2 is sent, UE1 utilizes the fixed feed-forward subframe RxIt is connect to UE2 feedback UE1 The Ack/Nack and CQI for the backward data received control information;
UE2 receive UE1 send data when, UE2 utilize the fixation after to feedback subframe RyIt is connect to UE1 feedback UE2 The Ack/Nack and CQI of the forward data of receipts control information.
It preferably, is R to feedback subframe after the fixation2, and the fixed feed-forward subframe is R6
Preferably, the method also includes:
When retransmitting data to UE2, the subframe and UE1 that UE1 is used transmit used by identical data to UE2 UE1 for the first time Subframe is consistent;
When retransmitting data to UE1, the subframe and UE2 that UE2 is used transmit used by identical data to UE1 UE2 for the first time Subframe is consistent.
Preferably, the method also includes:
UE1 adds 10 sons in the radio frames R that the UE1 is determined in the forward control information that UE1 is sent to UE2 To feedback subframe and fixed feed-forward subframe after the configuration of the front and back transmission direction of frame, the fixation.
Second aspect, the present invention provide a kind of terminal, and the terminal includes:
Computing unit calculates the data of the data volume of fl transmission and reverse transfers between itself UE1 and another terminal UE 2 The ratio of amount;
Determination unit, according to the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and UE2 Select the configuration of each subframe front and back transmission direction of corresponding radio frames;
Transmission unit, the configuration of each subframe front and back transmission direction of the radio frames for being selected according to the determination unit, Carry out data transmission with the UE2.
Preferably, the determination unit is specifically used for,
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set First threshold section in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 9F:1B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set Second threshold section in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 8F:2B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set Third threshold interval in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 7F:3B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set The 4th threshold interval in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 6F:4B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set The 5th threshold interval in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 5F:5B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set The 6th threshold interval in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 4F:6B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set The 7th threshold interval in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 3F:7B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set The 8th threshold interval in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 1F:9B;
Wherein, it is fl transmission that UE1, which sends data to UE2, in D2D system, and it is reverse transfers that UE2, which sends data to UE1, The radio frames R includes 10 subframe { R0,R1,R2,R3,R4,R5,R6,R7,R8,R9}。
Wherein, the meaning of the nF:mB is n fl transmission subframe, m reverse transfers subframe.
Preferably, the determination unit, be also used to determine fixation after to feedback subframe RxWith fixed feed-forward subframe Ry, 0 ≤ x≤9,0≤y≤9, x ≠ y;
Wherein, when itself UE1 receives the data that the UE2 is sent, itself UE1 utilizes the fixed feed-forward subframe RxThe Ack/Nack and CQI for feeding back the received backward data of itself UE1 to the UE2 control information;
The UE2 receive terminal UE 1 send data when, the UE2 utilize the fixation after to feedback subframe RyTo Terminal UE 1 feeds back Ack/Nack and CQI the control information of the received forward data of the UE2.
Preferably, the transmission unit, be also used to itself UE1 to another terminal UE 2 retransmit data when, using with it is first The consistent subframe of identical data is transmitted to UE2.
As shown from the above technical solution, D2D unicast communication method of the invention allow send UE and receive UE according to The data volume size of preceding reverse transfers selects transmission direction configuration before and after suitable subframe, efficiently utilizes resource, avoids The wasting of resources.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention Some embodiments for those of ordinary skill in the art without creative efforts, can also basis These attached drawings obtain other attached drawings.
Fig. 1 is the flow chart for the D2D unicast communication method that the embodiment of the present invention one provides;
Fig. 2 is the flow chart of D2D unicast communication method provided by Embodiment 2 of the present invention;
Fig. 3 is the feedback timing diagram of configuration 4 in table 2;
Fig. 4 is the structural schematic diagram for the terminal that the embodiment of the present invention five provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 shows the flow chart of the D2D unicast communication method of the offer of the embodiment of the present invention one, one institute of the embodiment of the present invention The D2D unicast communication method stated includes:
Step 101:UE1 is determined 10 in radio frames R according to the data volume of fl transmission between UE1 and UE2 and reverse transfers The configuration of the front and back transmission direction of a subframe;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 is in the threshold zone of setting When interior, UE1 selects the configuration of the front and back transmission direction of 10 subframes in radio frames R corresponding with the threshold interval of the setting, Carry out data transmission with the UE2.
Seen from the above description, the D2D unicast communication method of the present embodiment, which allows, sends UE and receives UE according to upper The data volume size of downlink transfer selects transmission direction configuration before and after suitable subframe, efficiently utilizes resource, avoids money Source waste.
Fig. 2 shows the flow chart of D2D unicast communication method provided by Embodiment 2 of the present invention, two institutes of the embodiment of the present invention The D2D unicast communication method stated includes:
Step 201:UE2 informs the reverse transfers number that UE2 described in UE1 will be transmitted to UE1 reporting buffer status report According to data volume.
Step 202:UE1 determines the data volume for the forward-going data that UE1 will be transmitted.
Step 203:UE1 calculates the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2.
Step 204:UE1 is selected according to the ratio of the data volume of fl transmission between UE1 and UE2 and the data volume of reverse transfers Corresponding sub-frame configuration is selected, and is notified by controlling information to UE2.
In this step, UE1 is according to the ratio of the data volume of fl transmission between UE1 and UE2 and the data volume of reverse transfers Value selects the configuration of transmission direction before and after each subframes of corresponding radio frames to include:
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the first threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 9F:1B;
For example, the first threshold section be [9 ,+inf), if the data volume that UE1 needs to be sent to UE2 is 100, and UE2 The data volume for needing to be sent to UE1 is 10, the data volume of the data volume of fl transmission and reverse transfers between such UE1 and UE2 Ratio be 10, fall in first threshold section, then UE1 determines matching for the front and back transmission direction of 10 subframes in the radio frames R It is set to 9F:1B.Wherein, the meaning of the nF:mB is n fl transmission subframe, m reverse transfers subframe.
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the second threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 8F:2B;
For example, the second threshold section be [4,9), if UE1 need to be sent to UE2 data volume be 100, and UE2 need The data volume for being sent to UE1 is 14, the data volume of the data volume and reverse transfers of fl transmission between such UE1 and UE2 Ratio is 7.14, falls in second threshold section, then UE1 determines matching for the front and back transmission direction of 10 subframes in the radio frames R It is set to 8F:2B.
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting third threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 7F:3B;
For example, the third threshold interval be [2.3,4), if the data volume that UE1 needs to be sent to UE2 is 100, and UE2 The data volume for needing to be sent to UE1 is 30, the data volume of the data volume of fl transmission and reverse transfers between such UE1 and UE2 Ratio be 3.3, fall in third threshold interval, then UE1 determines matching for the front and back transmission direction of 10 subframes in the radio frames R It is set to 7F:3B.
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the 4th threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 6F:4B;
For example, the 4th threshold interval be [1.5,2.3), if UE1 need to be sent to UE2 data volume be 100, and The data volume that UE2 needs to be sent to UE1 is 50, the data of the data volume of fl transmission and reverse transfers between such UE1 and UE2 The ratio of amount is 2, falls in the 4th threshold interval, then UE1 determines matching for the front and back transmission direction of 10 subframes in the radio frames R It is set to 6F:4B.
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the 5th threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 5F:5B;
For example, the 5th threshold interval be [1,1.5), if the data volume that UE1 needs to be sent to UE2 is 100, and UE2 The data volume for needing to be sent to UE1 is 100, the data volume of the data volume of fl transmission and reverse transfers between such UE1 and UE2 Ratio be 1, fall in the 5th threshold interval, then UE1 determines the configuration of the front and back transmission direction of 10 subframes in the radio frames R For 5F:5B.
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the 6th threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 4F:6B;
For example, the 6th threshold interval be [0.6,1), if UE1 need to be sent to UE2 data volume be 70, and UE2 need The data volume for being sent to UE1 is 100, the data volume of the data volume and reverse transfers of fl transmission between such UE1 and UE2 Ratio is 0.7, falls in the 6th threshold interval, then UE1 determines the configuration of the front and back transmission direction of 10 subframes in the radio frames R For 4F:6B.
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the 7th threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 3F:7B;
For example, the 7th threshold interval be [0.2,0.6), if the data volume that UE1 needs to be sent to UE2 is 30, and UE2 The data volume for needing to be sent to UE1 is 100, the data volume of the data volume of fl transmission and reverse transfers between such UE1 and UE2 Ratio be 0.3, fall in the 7th threshold interval, then UE1 determines matching for the front and back transmission direction of 10 subframes in the radio frames R It is set to 3F:7B.
When the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 ratio setting the 8th threshold When being worth in section, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 1F:9B;
For example, the 8th threshold interval be [- inf, 0.2), if UE1 need to be sent to UE2 data volume be 10, and The data volume that UE2 needs to be sent to UE1 is 100, the number of the data volume of fl transmission and reverse transfers between such UE1 and UE2 Ratio according to amount is 0.1, falls in the 8th threshold interval, then UE1 determines the front and back transmission direction of 10 subframes in the radio frames R Be configured to 1F:9B.
Wherein, it is fl transmission that UE1, which sends data to UE2, in D2D system, and it is reverse transfers that UE2, which sends data to UE1, The radio frames R includes 10 subframe { R0,R1,R2,R3,R4,R5,R6,R7,R8,R9}。
Wherein, UE1 adds the front and back transmission direction configuration in the forward control information that UE1 is sent to UE2, according to this Configuration determines the front and back transmission direction of 10 subframes in the radio frames R.Table 2 shows 8 kinds of different front and backs of the present embodiment Transmission method configuration.
The different front and back transmission direction configuration of 8 kinds of 2 the present embodiment of table
Step 205: transmission direction before and after each subframe determined according to step 204, UE1 carry out data transmission with the UE2.
In the present embodiment, the case where being likely to occur according to the front and back sent between UE and reception UE to transmission services amount, Transmission direction configures before and after setting 8 kinds of subframes, allows transmission UE and reception UE big according to the data volume of preceding reverse transfers Transmission direction configuration before and after the small suitable subframe of selection, efficiently utilizes resource, avoids the wasting of resources.
The specific steps for the D2D unicast communication method that the embodiment of the present invention three provides are identical as embodiment two, only in step On rapid 204 basis, the following contents is increased:
To feedback subframe R after UE1 determination is fixedxWith fixed feed-forward subframe Ry, 0≤x≤9,0≤y≤9, x ≠ y;
When UE1 receives the data that UE2 is sent, UE1 utilizes the fixed feed-forward subframe RxIt is connect to UE2 feedback UE1 The Ack/Nack and CQI for the backward data received control information;
UE2 receive UE1 send data when, UE2 utilize the fixation after to feedback subframe RyIt is connect to UE1 feedback UE2 The Ack/Nack and CQI of the forward data of receipts control information.
Preferably, determine after the fixation to feedback subframe to be R2, and the fixed feed-forward subframe is R6
The UE1 added in the forward control information that UE1 is sent to UE2 after the fixation to feedback subframe and it is fixed before To feedback subframe.
Wherein CQI (Channel Quality Indicator) is channel quality instruction, for indicating channel quality, one As 0 indicate channel quality it is worst, 15 indicate channel qualities it is best.
In existing system when eNB is that UE transmits data, UE needs feedback reception data correctness, it is therefore desirable to The A/N information of eNB is fed back to, A/N information is determining timing relationship for every kind of configuration, i.e., connects in some downlink subframe Data are received to feed back in determining sub-frame of uplink.The data of eNB are sent to for UE, eNB can also be fed back in corresponding downlink subframe A/N information.But it is different at the time of A/N information feeds back different configurations.For D2D business, when UE changes according to portfolio When transmission direction configures before and after subframe, it may cause to send UE due to control information loss etc. and reception UE is different Understanding.So as to cause the erroneous transmissions of data between two UE.In the embodiment of the present invention three, to anti-after being fixed by setting Present subframe RxWith fixed feed-forward subframe Ry, 0≤x≤9,0≤y≤9, x ≠ y;In this way, UE1 utilizes the fixed feed-forward Subframe RxInformation is controlled to the Ack/Nack and CQI of the UE2 feedback received backward data of UE1;UE2 is utilized after the fixation to anti- Present subframe RyInformation is controlled to the Ack/Nack and CQI of the UE1 feedback received forward data of UE2, since feedback is determining, UE Between will not because of information lose cause transmission mistake.
The specific steps for the D2D unicast communication method that the embodiment of the present invention four provides are identical as embodiment three, only in reality On the basis for applying example three, the following contents is increased:
When retransmitting data to UE2, the subframe and UE1 that UE1 is used transmit used by identical data to UE2 UE1 for the first time Subframe is consistent;
When retransmitting data to UE1, the subframe and UE2 that UE2 is used transmit used by identical data to UE1 UE2 for the first time Subframe is consistent, i.e., data, which retransmit, uses synchronous HARQ mechanism.
In the embodiment of the present invention four, setting UE1 retransmits subframe and UE2 retransmits subframe and uses and just pass identical subframe, Data, which will retransmit, in this way to carry out determining to retransmit in subframe, in this way, not needed between UE as possible re-transmission and corresponding redundancy Version transmits additional control information, therefore can reduce the expense of control signaling.
Below for example, scheme described in embodiment three and example IV is told about, referring to Fig. 3, Fig. 3 is to match in table 2 Set the feedback timing diagram of 4 (front and back transmission direction is 5F:5B).
At this point, to feedback subframe as R after setting fixation2, the fixed feed-forward subframe is R6
UE2 receives all forward datas after fixation to feedback subframe R2Feed back to UE1.Such as forward direction subframe 9,0,1, 5,6 Ack/Nack is after fixation to feedback subframe R2Feedback;As shown in figure 3, after UE1 reception is all to data all before fixation To feedback subframe R6UE2 is fed back to, the Ack/Nack of backward subframe 3,4,7,8 is in fixed feed-forward subframe R6Feedback.
Synchronous HARQ mechanism is used for retransmitting, retransmits and uses identical subframe with first pass, only certain interval of time, than Such as 20ms.
For example, the subframe R of radio frames 21F (preceding) to feedback radio frames 3 subframe R2Feedback, re-transmission will be in radio frames 4 Subframe R1Middle progress.Using this synchronization mechanism, it is possible to reduce the expense of control signaling, that is, retransmitting possible redundancy versions is It is corresponding with subframe, be all it is determining, do not need to transmit additional control for possible re-transmission and corresponding redundancy versions between UE Information processed.
Fig. 4 shows a kind of structural schematic diagram of terminal of the offer of the embodiment of the present invention five, described in the embodiment of the present invention five Terminal include:
Computing unit 21 calculates the number of the data volume of fl transmission and reverse transfers between itself UE1 and another terminal UE 2 According to the ratio of amount;
Determination unit 22, according to the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and UE2 Value selects the configuration of the transmission direction of corresponding radio frames;
Transmission unit 23, each subframe front and back transmission direction of the radio frames for being selected according to the determination unit are matched It sets, carries out data transmission with the UE2.
Wherein, the determination unit 22 is specifically used for,
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set First threshold section in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 9F:1B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set Second threshold section in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 8F:2B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set Third threshold interval in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 7F:3B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set The 4th threshold interval in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 6F:4B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set The 5th threshold interval in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 5F:5B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set The 6th threshold interval in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 4F:6B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set The 7th threshold interval in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 3F:7B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is being set The 8th threshold interval in when, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 1F:9B;
Wherein, it is fl transmission that UE1, which sends data to UE2, in D2D system, and it is reverse transfers that UE2, which sends data to UE1, The radio frames R includes 10 subframe { R0,R1,R2,R3,R4,R5,R6,R7,R8,R9}。
Wherein, the meaning of the nF:mB is n fl transmission subframe, m reverse transfers subframe.
Wherein, the determination unit 22, be also used to determine fixation after to feedback subframe RxWith fixed feed-forward subframe Ry, 0 ≤ x≤9,0≤y≤9, x ≠ y;
Wherein, when itself UE1 receives the data that the UE2 is sent, itself UE1 utilizes the fixed feed-forward subframe RxThe Ack/Nack and CQI for feeding back the received backward data of itself UE1 to the UE2 control information;
The UE2 receive this terminal UE 1 transmission data when, the UE2 utilize the fixation after to feedback subframe Ry The Ack/Nack and CQI for feeding back the received forward data of the UE2 to this terminal UE 1 control information.
Wherein, the transmission unit, be also used to itself UE1 to another terminal UE 2 retransmit data when, using with for the first time to UE2 transmits the consistent subframe of identical data.
Terminal described in the present embodiment can be to execute embodiment one to method described in example IV, realization principle Similar with effect, details are not described herein.
The above examples are only used to illustrate the technical scheme of the present invention, rather than its limitations;Although with reference to the foregoing embodiments Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation Technical solution documented by example is modified or equivalent replacement of some of the technical features;And these are modified or replace It changes, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.

Claims (10)

1. a kind of D2D unicast communication method, which is characterized in that
UE1 determines the front and back of 10 subframes in radio frames R according to the data volume of fl transmission between UE1 and UE2 and reverse transfers The configuration of transmission direction;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 is in the threshold interval of setting When, UE1 selects the configuration of the front and back transmission direction of 10 subframes in radio frames R corresponding with the threshold interval of the setting, with institute UE2 is stated to carry out data transmission;
Wherein, the UE1 and UE2 is counted using the configuration of the front and back transmission direction of 10 subframes in same radio frames R According to transmission.
2. the method according to claim 1, wherein it is described when between UE1 and UE2 the data volume of fl transmission with When the ratio of the data volume of reverse transfers is in the threshold interval of setting, UE1 selects nothing corresponding with the threshold interval of the setting The configuration of the front and back transmission direction of 10 subframes includes: in line frame R
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 is in the first threshold area of setting When interior, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 9F:1B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 is in the second threshold area of setting When interior, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 8F:2B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 is in the third threshold zone of setting When interior, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 7F:3B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 is in the 4th threshold zone of setting When interior, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 6F:4B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 is in the 5th threshold zone of setting When interior, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 5F:5B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 is in the 6th threshold zone of setting When interior, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 4F:6B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 is in the 7th threshold zone of setting When interior, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 3F:7B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between UE1 and UE2 is in the 8th threshold zone of setting When interior, what UE1 determined the front and back transmission direction of 10 subframes in the radio frames R is configured to 1F:9B;
Wherein, it is fl transmission that UE1, which sends data to UE2, in D2D system, and it is reverse transfers that UE2, which sends data to UE1, described Radio frames R includes 10 subframe { R0,R1,R2,R3,R4,R5,R6,R7,R8,R9};
Wherein, the meaning of the nF:mB is n fl transmission subframe, m reverse transfers subframe.
3. according to the method described in claim 2, it is characterized by further comprising:
To feedback subframe R after UE1 determination is fixedxWith fixed feed-forward subframe Ry, 0≤x≤9,0≤y≤9, x ≠ y;
When UE1 receives the data that UE2 is sent, UE1 utilizes the fixed feed-forward subframe RxTo UE2 feedback UE1 it is received after Information is controlled to Ack/Nack, CQI of data;
UE2 receive UE1 send data when, UE2 utilize the fixation after to feedback subframe RyTo UE1 feedback UE2 it is received before Information is controlled to Ack/Nack, CQI of data.
4. according to the method described in claim 3, it is characterized in that,
After the fixation to feedback subframe be R2, and the fixed feed-forward subframe is R6
5. method according to any one of claims 1 to 4, which is characterized in that further include:
For UE1 when retransmitting data to UE2, the subframe and UE1 that UE1 is used transmit subframe used by identical data to UE2 for the first time Unanimously;
For UE2 when retransmitting data to UE1, the subframe and UE2 that UE2 is used transmit subframe used by identical data to UE1 for the first time Unanimously.
6. the method according to claim 3 or 4, which is characterized in that further include:
UE1 adds in the radio frames R that the UE1 is determined 10 subframes in the forward control information that UE1 is sent to UE2 To feedback subframe and fixed feed-forward subframe after the configuration of front and back transmission direction, the fixation.
7. a kind of terminal, which is characterized in that the terminal includes:
Computing unit calculates the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and another terminal UE 2 Ratio;
Determination unit is selected according to the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and UE2 The configuration of transmission direction before and after each subframe of corresponding radio frames;
Transmission unit, the configuration of each subframe front and back transmission direction of the radio frames for being selected according to the determination unit, with institute UE2 is stated to carry out data transmission;
Wherein, the UE1 and UE2 is counted using the configuration of the front and back transmission direction of 10 subframes in same radio frames R According to transmission.
8. terminal according to claim 7, which is characterized in that the determination unit is specifically used for,
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is the of setting When in one threshold interval, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 9F:1B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is the of setting When in two threshold intervals, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 8F:2B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is the of setting When in three threshold intervals, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 7F:3B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is the of setting When in four threshold intervals, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 6F:4B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is the of setting When in five threshold intervals, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 5F:5B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is the of setting When in six threshold intervals, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 4F:6B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is the of setting When in seven threshold intervals, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 3F:7B;
When the ratio of the data volume of the data volume and reverse transfers of fl transmission between itself UE1 and the UE2 is the of setting When in eight threshold intervals, determine the front and back transmission direction of 10 subframes in the radio frames R is configured to 1F:9B;
Wherein, it is fl transmission that UE1, which sends data to UE2, in D2D system, and it is reverse transfers that UE2, which sends data to UE1, described Radio frames R includes 10 subframe { R0,R1,R2,R3,R4,R5,R6,R7,R8,R9};
Wherein, the meaning of the nF:mB is n fl transmission subframe, m reverse transfers subframe.
9. terminal according to claim 8, which is characterized in that
The determination unit, be also used to determine fixation after to feedback subframe RxWith fixed feed-forward subframe Ry, 0≤x≤9,0≤y ≤ 9, x ≠ y;
Wherein, when itself UE1 receives the data that the UE2 is sent, itself UE1 utilizes the fixed feed-forward subframe RxTo Ack/Nack, CQI of the UE2 feedback received backward data of UE1 control information;
The UE2 receive terminal UE 1 send data when, the UE2 utilize the fixation after to feedback subframe RyTo terminal UE1 feeds back Ack/Nack, CQI control information of the received forward data of the UE2.
10. according to any terminal of claim 7~9, which is characterized in that the transmission unit is also used in itself UE1 To another terminal UE 2 retransmit data when, using with for the first time to UE2 transmit the consistent subframe of identical data.
CN201410572914.5A 2014-10-23 2014-10-23 A kind of D2D unicast communication method and terminal Expired - Fee Related CN105591727B (en)

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CN106793109B (en) * 2016-11-11 2020-03-24 工业和信息化部电信研究院 Terminal direct connection unicast control method for mobile communication
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