CN105337706A

CN105337706A - Data transmission method, device and system

Info

Publication number: CN105337706A
Application number: CN201410387561.1A
Authority: CN
Inventors: 杨瑾; 李儒岳; 吴栓栓; 卢有雄
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2014-08-07
Filing date: 2014-08-07
Publication date: 2016-02-17
Also published as: WO2016019724A1

Abstract

The invention discloses a data transmission method, device and system. The data transmission method comprises the following steps that: first user equipment (UE) determines a sub-frame on which data channel resources are positioned through an initial transmission sub-frame index number k, or the initial transmission sub-frame index number k and a retransmission interval t, wherein the k and the t are non-negative integers; and the first UE transmits data transmission blocks (TBs) on the sub-frame on which the data channel resources are positioned.

Description

Data sending method, device and system

Technical Field

The present invention relates to the field of communications, and in particular, to a data transmission method, apparatus, and system.

Background

In a device-to-device (D2D) communication system, when there is a service to be transmitted between User Equipments (UEs), the service data between the UEs is directly transmitted to a target UE through an air interface by a data source UE without being forwarded by a base station. Fig. 1 is a schematic diagram of a D2D communication structure according to the related art, and as shown in fig. 1, this communication mode has a characteristic obviously different from a communication mode of a conventional cellular system, and for a short-distance communication user capable of applying a D2D communication mode, D2D transmission not only saves wireless spectrum resources, but also reduces data transmission pressure of a core network, and can reduce system resource occupation, increase spectral efficiency of the cellular communication system, reduce terminal transmission power consumption, and save network operation cost to a great extent.

In a Long Term Evolution (LTE) system, a radio resource is divided into resources in a unit of a radio frame in a time domain, and each radio frame is 10ms and includes 10 subframes. Each subframe is 1ms, divided into 2 slots (slots) of 0.5ms, as shown in fig. 2. In cellular communication, radio resources of a UE are uniformly scheduled by an evolved node b (eNB), and the UE receives scheduling control indication information from the eNB and receives data transmitted by the eNB on corresponding downlink resources or transmits signals to the eNB on uplink resources according to the indication information. In D2D communication, data is transmitted directly between the transmitting UE and the receiving UE through fixed wireless resources, and the transmitting UE cannot dynamically determine the D2D data channel resource configuration information by using the method of eNB scheduling indication resources to UEs in cellular communication.

An effective solution has not been proposed so far for the problem that the transmitting end UE of D2D communication in the related art cannot dynamically indicate the used D2D data channel resources.

Disclosure of Invention

Aiming at the problem that the transmitting end UE of D2D communication cannot dynamically indicate the used D2D data channel resources in the related art, the invention provides a data transmission scheme to at least solve the problem.

According to an aspect of the present invention, there is provided a data transmission method, including: the method comprises the steps that first User Equipment (UE) determines a subframe where data channel resources are located through an initial transmission subframe index number k, or the initial transmission subframe index number k and a retransmission interval t, wherein k and t are non-negative integers; and the first UE sends a data transmission block TB on the subframe where the data channel resource is located.

Optionally, the first user equipment UE determines a subframe where the data channel resource is located according to the initial transmission subframe index k; the first UE sends the TB on a subframe where the data channel resources are located; or the first user equipment UE determines N subframes where data channel resources are located through the initial transmission subframe index k and the retransmission interval t, wherein N is an integer greater than 0; and the first UE transmits the TB for N times on the N subframes where the data channel resources are located, wherein N is the transmission times of the TB.

Optionally, the method further comprises: and the first UE indicates a subframe where the data channel resource is located within a TB interval corresponding to the TB to be sent, wherein the TB interval is the maximum subframe range which can be used for sending the TB and comprises K subframes, and K is a positive integer which is more than or equal to the sending times of the TB.

Optionally, the determining, by the first UE, a subframe in which the data channel resource is located includes: and the first UE determines an initial transmission subframe # K for transmitting the TB for the first time within the TB interval according to the initial transmission subframe index K, wherein the initial subframe of the TB interval is marked as a subframe #0, the initial transmission subframe # K refers to the kth subframe after the initial subframe, K belongs to [0, K-1], and K is the TB interval.

Optionally, the determining, by the first UE, the subframe where the data channel resource is located further includes: and the first UE determines N-1 retransmission subframes # m for repeatedly transmitting the TB within the TB interval through the retransmission interval t based on the initial transmission subframe # k, wherein N is the transmission times of the TB, and m is k + t N and N belongs to [1, N-1 ].

Optionally, the determining, by the first UE, the subframe where the data channel resource is located includes: the first UE determines a first transmission subframe # k for transmitting the TB for the first time within the TB interval according to the initial transmission subframe index k_D2DWherein K is contained within the TB interval_D2DDevice-to-device D2D subframe, K_D2DLess than or equal to K, adding the K_D2DThe D2D subframes are sequentially connected to form a logic subframe sequence, which is respectively marked as subframes [ #0, …, # K [_D2D-1]Wherein the initial transmission subframe index k indicates a logical initial transmission subframe # k in the logical subframe sequence, and then a physical initial transmission subframe # k corresponding to the logical initial transmission subframe # k is determined according to the distribution of the D2D subframes in the TB interval_D2D(ii) a The number K of the D2D subframes contained within the TB interval_D2DAnd subframe location is indicated by system pre-defined or higher layer signaling configuration.

Optionally, the determining, by the first UE, a subframe where the data channel resource is located further includes: the first UE based on the initial transmission subframe # k_D2DDetermining, by the retransmission interval t, N-1 retransmission subframes # m in which the TB is repeatedly transmitted within the TB interval_D2DWherein, at said K_D2DThe D2D subframes are connected in sequence to form a logic subframe sequence [ #0, …, # K [ ]_D2D-1]Determining a logical retransmission subframe # m, m ═ k + t × N, N ∈ [1, N-1] according to the logical initial transmission subframe # k and the retransmission interval t]Further, according to the distribution of the D2D subframes in the TB interval, determining a physical retransmission subframe # m corresponding to the logical retransmission subframe # m_D2D。

Optionally, in a case that a subframe in which the used data channel resource is located is determined by the initial transmission subframe index k and the retransmission interval t, the retransmission interval t is set to a fixed value, or the t value indicates meaningless, or does not indicate the t value, or the t value is null.

Optionally, the method further comprises: the first UE indicates the initial transmission subframe index k and/or the retransmission interval T in a control indication signaling, wherein the control indication signaling is time domain resource pattern transmission T-RPT information in device-to-device D2D scheduling configuration signaling or D2D scheduling indication SA signaling.

Optionally, the first UE indicates the retransmission interval t through a 1 or 2 or 3 or 4bit indication signaling.

Optionally, the method further comprises: the first UE indicates the initial transmission subframe index number K in a control indication signaling, wherein the maximum value of the indicated initial transmission subframe index number K is determined by a TB interval K and the transmission times N of the TB, and the value range of the initial transmission subframe index number K is an integer value which is larger than or equal to zero and smaller than K divided by N and rounded downwards; or is more than or equal to zero and is less than K divided by N, and the determined numerical value and the smaller value in 15 are taken down and are integers; or, the indicated maximum value of the initial transmission subframe index K is determined by the number K of D2D subframes contained in the TB interval_D2DAnd the transmission times N of the TB are determined, and the value range of the initial transmission subframe index number K is more than or equal to zero and less than K_D2DDivide by N a rounded down integer value; or is greater than or equal to zero and less than K_D2DDivide by N to get the exactly determined value and the smaller of 15, take the integer.

Optionally, the initial transmission subframe index k is determined according to at least one of the following information: resource information of a control indication channel used by the first UE, ID information of the first UE, the number K of subframes contained in a TB interval, and the number K of D2D subframes contained in the TB interval_D2DThe transmission times N of the TBs, and the retransmission interval t.

Optionally, the initial transmission subframe index K is resource information of a control indication channel used by the first UE and the number K of subframes contained in the TB interval or the number K of D2D subframes_D2DDetermining, wherein K is a numerical value obtained by performing modulo operation on K by using a resource index number SAindex of the control indication channel; or K is the resource index number SAindex of the control indication channel to K_D2DAnd performing modulo operation to obtain a numerical value.

Optionally, the initial transmission subframe index K is defined by the ID of the first UE and the number K of subframes contained in the TB interval or the number K of D2D subframes_D2DDetermining, wherein K is a numerical value obtained by performing modulo operation on K by using a UE Radio Network Temporary Identifier (RNTI) or a D2DRNTI of the first UE; or K is the UERNTI or D2DRNTI pair K of the first UE_D2DAnd performing modulo operation to obtain a numerical value.

Optionally, the initial transmission subframe index K is resource information of a control indication channel used by the first UE, a number K of subframes included in the TB interval, or the number K of D2D subframes_D2DAnd determining the transmission times N of the TB, wherein K is a numerical value obtained by performing modulo operation on a numerical value obtained by dividing K by N and rounding down by a resource index number SAindex of the control indication channel; or K is the resource index number SAindex of the control indication channel to K_D2DAnd dividing the numerical value by N to be rounded down, and performing modulo operation to obtain the numerical value.

Optionally, the initial transmission subframe index K is resource information of a control indication channel used by the first UE, a number K of subframes included in the TB interval, or the number K of D2D subframes_D2DDetermining a number of transmission times N of the TB and the retransmission interval t, where K is (saidex) mod (K- (N-1) × t), where saidex is a resource index of the control indication channel; or K ═ SAindex (K) mod (K)_D2D-(N-1)*t)。

Optionally, the initial transmission subframe index K is determined by the ID of the first UE, the number of subframes K contained in the TB interval orThe number K of the D2D sub-frames_D2DAnd determining the transmission times N of the TB, wherein K is a numerical value obtained by performing modulo operation on a numerical value obtained by dividing K by N and rounding down by the UERNTI or D2DRNTI of the first UE; or K is the UERNTI or D2DRNTI pair K of the first UE_D2DAnd dividing the numerical value by N to be rounded down, and performing modulo operation to obtain the numerical value.

Optionally, the initial transmission subframe index K is determined by an ID of the first UE, a number K of subframes included in the TB interval, or the number K of D2D subframes_D2DThe number of transmissions N of the TB, and the retransmission interval t, where K is (UED2DRNTI) mod (K- (N-1) × t), UED2DRNTI is UERNTI or D2DRNTI of the first UE; or K ═ UED2DRNTI) mod (K)_D2D-(N-1)*t)。

Optionally, the initial transmission subframe index k further overlaps an offset indication amount Δ k as the updated initial transmission subframe index k, where the offset indication amount Δ k is indicated by the first UE in a control indication signaling, and the control indication signaling is a device-to-device D2D scheduling configuration signaling or a D2DSAT-RPT signaling.

Optionally, the retransmission interval t is a unique fixed value and is determined by a system specification; or, the retransmission interval t is indicated by a network side through a high layer signaling configuration, where the network side includes one or more of the following entities: an evolved node B eNB, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN, and an operation administration and maintenance OAM manager.

Optionally, the retransmission interval t is determined according to a predefined rule and the number of transmission times N of the TB.

Optionally, the predefined rule for determining the retransmission interval t according to the number of transmissions N of the TB includes at least one of: when N is 2, t is 4, when N is 4, t is 2, when N is 8, t is 1; or when N is 2, t is 8, N is 4, t is 4, and when N is 8, t is 1; or when N is 2, t is 8, N is 4, t is 4, and when N is 8, t is 2; or when N is 2, t is 3, N is 4, t is 2, and when N is 8, t is 1; or when N is 2, t is 5, N is 4, t is 3, and when N is 8, t is 2; or, when N is 2, t is 4, N is 4, t is 1, or when N is 2, t is 4, N is 4, t is 2, or when N is 2, t is 2, N is 4, t is 1, or when N is 2, t is 4, t is 8, N is 4, t is 4.

Optionally, the retransmission interval t is according to a TB interval K or a number K of D2D subframes contained in the TB interval_D2DAnd the number of transmission times N of the TB is determined, wherein the retransmission interval t is equal to K divided by an integer value rounded down by N; or the retransmission interval t is equal to K_D2DDivided by an integer value rounded down by N.

Optionally, the initial transmission subframe index k and the retransmission interval t are determined by a resource configuration index resourceindenxi indicated by the first UE in a control indication signaling and a predefined resource configuration table.

Optionally, the control indication signaling is scheduling configuration signaling for device-to-device D2D, or D2DSAT-RPT signaling.

Optionally, the resource allocation index i in the resource allocation table is the TB interval K, the transmission times N of the TB, and an initial transmission subframe index K or an initial transmission subframe reference value K₀That is, the resource allocation index i uniquely corresponds to one TB interval K, the number of transmission times N of the TB, and the initial transmission subframe index K or the initial transmission subframe reference value K₀。

Optionally, different values of the combination [ K, N ] of the TB interval and the transmission times of the TB correspond to different numbers of the resource configuration index i.

Optionally, a TB interval K corresponding to the resource configuration index i, the number of transmission times N of the TB, and an initial transmission subframe index K are defined in the resource configuration table; and the retransmission interval t is determined according to the TB interval K and the transmission times N of the TB, wherein t is an integer value obtained by dividing K by N and rounding down.

Optionally, a TB interval K corresponding to the resource allocation index i, the number of transmission times N of the TB, and an initial transmission subframe reference value K are defined in the resource allocation table₀(ii) a The retransmission interval t is determined according to the number K of D2D sub-frames contained in the TB interval_D2DAnd the number of transmissions N of said TB, where t equals K_D2DDivide by N a rounded down integer value; the index number k of the initial transmission subframe is according to the retransmission interval t and the reference value k of the initial transmission subframe₀Is determined, where k equals k₀And carrying out modular operation on t to obtain a numerical value.

According to another aspect of the present invention, there is provided a data receiving method including: the second user equipment UE determines the subframe where the data channel resource is located through an initial transmission subframe index number k or the initial transmission subframe index number k and a retransmission interval t, wherein k and t are non-negative integers; and the second UE receives a data transmission block TB on the subframe where the data channel resource is located.

Optionally, the second UE determines a subframe where the data channel resource is located according to the initial transmission subframe index k, and receives a data transmission block TB on the subframe where the data channel resource is located; or the second user equipment UE determines N subframes where data channel resources are located through the initial transmission subframe index k and the retransmission interval t, where N is an integer greater than 0, and receives N transmissions of the TB on the N subframes where the data channel resources are located, where N is the transmission frequency of the TB.

Optionally, the determining, by the second UE, the subframe where the data channel resource is located includes: and the second UE determines a subframe where the data channel resource is located according to the initial transmission subframe index number K or the initial transmission subframe index number K and the retransmission interval t within a TB interval corresponding to the TB to be received, wherein the TB interval is the maximum subframe range which can be used for receiving the TB and comprises K subframes, K is greater than or equal to N, and K is a positive integer.

Optionally, the determining, by the second UE, the subframe in which the data channel resource is located includes: and the second UE determines an initial transmission subframe # K for receiving the TB for the first time within the TB interval according to the initial transmission subframe index number K, wherein the initial transmission subframe # K of the TB interval is marked as a subframe #0, the initial transmission subframe # K is the kth subframe after the initial subframe, and K belongs to [0, K-1 ].

Optionally, the determining, by the second UE, the subframe where the data channel resource is located further includes: determining, based on the initial transmission subframe # k, N-1 retransmission subframes # m for receiving the TB retransmission within the TB interval, where m is k + t N, and N e [1, N-1], through the retransmission interval t.

Optionally, the determining, by the second UE, the subframe where the data channel resource is located includes: the second UE determines an initial transmission subframe # k for receiving the TB for the first time within the TB interval according to the initial transmission subframe index k_D2DWherein K is contained within the TB interval_D2DDevice-to-device D2D subframe, K_D2DLess than or equal to K, adding the K_D2DThe D2D subframes are sequentially connected to form a logic subframe sequence, which is respectively marked as subframes [ #0, …, # K [_D2D-1](ii) a The initial transmission subframe index k indicates a logical initial transmission subframe # k in the logical subframe sequence, and further, according to the distribution of the D2D subframes in the TB interval, a physical initial transmission subframe # k corresponding to the logical initial transmission subframe # k is determined_D2D(ii) a The number K of the D2D subframes contained within the TB interval_D2DAnd subframe location is indicated by system pre-defined or higher layer signaling configuration.

Optionally, the determining, by the second UE, the subframe where the data channel resource is located further includes: the second UE based on the first transmission subframe # k_D2DDetermining, by the retransmission interval t, N-1 retransmission subframes # m in which the TB retransmission is received within the TB interval_D2DWherein, at said K_D2DThe D2D subframes are connected in sequence to form a logic subframe sequence [ #0, …, # K [ ]_D2D-1]According to the logic initial transmission subframe # k and the retransmission interval tDetermining a logical retransmission subframe # m, m + t N, N ∈ [1, N-1 [ ]]Further, according to the distribution of the D2D subframes in the TB interval, determining a physical retransmission subframe # m corresponding to the logical retransmission subframe # m_D2D。

Optionally, when the second UE determines a subframe in which the used data channel resource is located according to the initial transmission subframe index k and the retransmission interval t, the retransmission interval t is a fixed value, or the t value indication is meaningless, or the t value indication is not obtained, or the indicated t value is null.

Optionally, the second UE obtains the initial transmission subframe index k and/or the retransmission interval T in a control indication signaling sent by a first UE, where the control indication signaling is a device-to-device D2D scheduling configuration signaling or a time domain resource pattern transmission T-RPT signaling in a D2D scheduling indication SA signaling, and the first UE is a sending end of the control indication signaling and the TB.

Optionally, the second UE obtains the initial transmission subframe index K from the control indication signaling, where a maximum value of the initial transmission subframe index K is determined by the TB interval K and the transmission frequency N of the TB, and a value range of the initial transmission subframe index K is an integer value that is greater than or equal to zero and smaller than K divided by N and rounded down; or is more than or equal to zero and is less than K divided by N, and the determined numerical value and the smaller value in 15 are taken down and are integers; or the maximum value of the initial transmission subframe index number K is determined by the number K of the D2D subframes contained in the TB interval_D2DAnd the transmission times N of the TB are determined, and the value range of the initial transmission subframe index number K is more than or equal to zero and less than K_D2DDivide by N a rounded down integer value; or is greater than or equal to zero and less than K_D2DDivide by N to get the exactly determined value and the smaller of 15, take the integer.

Optionally, the second UE determines the initial transmission subframe index k according to at least one of: the received resource information of the control indication channel, the ID information of the first UE, and the TB intervalThe number of contained sub-frames K, the number of D2D sub-frames K contained within the TB interval_D2DThe number of transmission times N of the TB, and the retransmission interval t.

Optionally, the initial transmission subframe index K is determined by the number K of subframes contained in the received resource information of the control indicator channel and the TB interval or the number K of subframes D2D_D2DDetermining, wherein K is a numerical value obtained by performing modulo operation on K by using a resource index number SAindex of the control indication channel; or K is the resource index number SAindex of the control indication channel to K_D2DAnd performing modulo operation to obtain a numerical value.

Optionally, the initial transmission subframe index K is used by the first UE for resource information of a control indicator channel, a number of subframes KK included in the TB interval, or the number of D2D subframes K_D2DAnd determining the transmission times N of the TB, wherein K is a numerical value obtained by performing modulo operation on a numerical value obtained by dividing K by N and rounding down by a resource index number SAindex of the control indication channel; or K is the resource index number SAindex of the control indication channel to K_D2DAnd dividing the numerical value by N to be rounded down, and performing modulo operation to obtain the numerical value.

Optionally, the initial transmission subframe index K is determined by an ID of the first UE, a number K of subframes included in the TB interval, or the number K of D2D subframes_D2DAnd determining the transmission times N of the TB, wherein K is a numerical value obtained by performing modulo operation on a numerical value obtained by dividing K by N and rounding down by the UERNTI or D2DRNTI of the first UE; or K is the UERNTI or D2DRNTI pair K of the first UE_D2DAnd dividing the numerical value by N to be rounded down, and performing modulo operation to obtain the numerical value.

Optionally, the initial transmission subframe index K is determined by an ID of the first UE, a number of subframes K contained in the TB interval, or the number of D2D subframes K_D2DThe number of transmissions N of the TB, and the retransmission interval t, where K is (UED2DRNTI) mod (K- (N-1) × t), where UED2DRNTI is UERNTI or D2DRNTI of the first UE; or K ═ UED2DRNTI) mod (K)_D2D-(N-1)*t)。

Optionally, the second UE receives information indicating the retransmission interval t by 1bit, 2bits, 3 bits, or 4 bits from a control indication signaling sent by the first UE.

Optionally, the retransmission interval t is a unique fixed value and is determined by a system specification; or, the retransmission interval t is indicated by a network side through a high layer signaling configuration, where the network side includes at least one of the following entities: an evolved node B eNB, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN, and an operation administration and maintenance OAM manager.

Optionally, the second UE determines the initial transmission subframe index k and the retransmission interval t according to a resource configuration index k indicated in the control indication signaling and a predefined resource configuration table.

Optionally, a TB interval K corresponding to the resource configuration index i, the transmission times N of the TB, and an initial transmission subframe index K are defined in the resource configuration table; and the retransmission interval t is determined according to the TB interval K and the transmission times N of the TB, wherein t is an integer value obtained by dividing K by N and rounding down.

According to still another aspect of the present invention, there is provided a data transmission apparatus including: the determining module is used for determining a subframe where the data channel resource is located according to an initial transmission subframe index number k, or the initial transmission subframe index number k and a retransmission interval t, wherein k and t are non-negative integers; and the sending module is used for sending the data transmission block TB on the subframe where the data channel resource is located.

Optionally, the determining module is configured to determine a subframe in which the data channel resource is located according to the initial transmission subframe index k; or determining N subframes where data channel resources are located through the initial transmission subframe index number k and the retransmission interval t, wherein N is an integer greater than 0; the sending module is used for sending the TB on a subframe where the data channel resource is located; or sending the TB for N times on the N subframes where the data channel resources are located, wherein N is the sending times of the TB.

Optionally, the method further comprises: an indicating module, configured to indicate the initial transmission subframe index k and/or the retransmission interval t in a control indication signaling, where the control indication signaling is a device-to-device D2D scheduling configuration signaling or a D2DSAT-RPT signaling.

Optionally, the determining module is configured to determine, by using the initial transmission subframe index K, an initial transmission subframe # K for transmitting the TB for the first time within a TB interval, where a starting subframe of the TB interval is denoted as a subframe #0, the initial transmission subframe # K is a kth subframe after the starting subframe, and K is equal to [0, K-1], and K is the TB interval.

Optionally, the determining module is further configured to determine, based on the initial transmission subframe # k, N-1 retransmission subframes # m for repeatedly transmitting the TB within the TB interval through the retransmission interval t, where N is the transmission time of the TB, and m is k + t × N, and N ∈ [1, N-1 ].

Optionally, the determining module is configured to determine, by using the initial transmission subframe index k, an initial transmission subframe # k for transmitting the TB for the first time within the TB interval_D2DWherein K is contained within the TB interval_D2DDevice-to-device D2D subframe, K_D2DLess than or equal to K, adding the K_D2DThe D2D subframes are sequentially connected to form a logic subframe sequence, which is respectively marked as subframes [ #0, …, # K [_D2D-1]Wherein the initial transmission subframe index k indicates a logical initial transmission subframe # k in the logical subframe sequence, and then a physical initial transmission subframe # k corresponding to the logical initial transmission subframe # k is determined according to the distribution of the D2D subframes in the TB interval_D2D(ii) a The number K of the D2D subframes contained within the TB interval_D2DAnd subframe location is indicated by system pre-defined or higher layer signaling configuration.

Optionally, the determining module is further configured to determine the initial transmission subframe # k based on the number of the first transmission subframes # k_D2DDetermining, by the retransmission interval t, N-1 retransmission subframes # m in which the TB is repeatedly transmitted within the TB interval_D2DWherein, at said K_D2DThe D2D subframes are connected in sequence to form a logic subframe sequence [ #0, …, # K [ ]_D2D-1]In the above, the logical repeat is determined according to the logical first transmission subframe # k and the retransmission interval tSub-frame # m, m + t N, N ∈ [1, N-1 [ ]]Further, according to the distribution of the D2D subframes in the TB interval, determining a physical retransmission subframe # m corresponding to the logical retransmission subframe # m_D2D。

According to still another aspect of the present invention, there is provided a data receiving apparatus including: the determining module is used for determining a subframe where the data channel resource is located through an initial transmission subframe index number k or the initial transmission subframe index number k and a retransmission interval t, wherein k and t are non-negative integers; and the receiving module is used for receiving the data transmission block TB on the subframe where the data channel resource is located.

Optionally, the determining module is configured to determine a subframe where the data channel resource is located according to the initial transmission subframe index k or determine N subframes where the data channel resource is located according to the initial transmission subframe index k and the retransmission interval t, where N is an integer greater than 0; the receiving module is used for receiving a data transmission block TB on a subframe where the data channel resources are located; or receiving the transmission times of the TB for N times on N subframes where the data channel resources are located, wherein N is the transmission times of the TB.

Optionally, the determining module is configured to determine, within a TB interval corresponding to the TB to be received, a subframe where the data channel resource is located according to the initial transmission subframe index K, or the initial transmission subframe index K and the retransmission interval t, where the TB interval is a maximum subframe range that can be used for receiving the TB and includes K subframes, K is greater than or equal to N, and K is a positive integer.

Optionally, the determining module is configured to determine, by using the initial transmission subframe index K, an initial transmission subframe # K for receiving the TB for the first time within a TB interval, where a starting subframe of the TB interval is denoted as a subframe #0, the initial transmission subframe # K is a kth subframe after the starting subframe, and K ∈ [0, K-1 ].

Optionally, the determining module is further configured to determine, based on the initial transmission subframe # k, N-1 retransmission subframes # m for receiving the TB retransmission within the TB interval through the retransmission interval t, where m is k + t N, and N e [1, N-1 ].

Optionally, the determining module is configured to determine, through the initial transmission subframe index k, an initial transmission subframe # k for receiving the TB for the first time within the TB interval_D2DWherein K is contained within the TB interval_D2DDevice-to-device D2D subframe, K_D2DLess than or equal to K, adding the K_D2DThe D2D subframes are sequentially connected to form a logic subframe sequence, which is respectively marked as subframes [ #0, …, # K [_D2D-1](ii) a The initial transmission subframe index k indicates a logical initial transmission subframe # k in the logical subframe sequence, and further, according to the distribution of the D2D subframes in the TB interval, a physical initial transmission subframe # k corresponding to the logical initial transmission subframe # k is determined_D2D(ii) a The number K of the D2D subframes contained within the TB interval_D2DAnd subframe location is indicated by system pre-defined or higher layer signaling configuration.

Optionally, the determining module is further configured to determine the initial transmission subframe # k based on the number of the first transmission subframes # k_D2DDetermining, by the retransmission interval t, N-1 retransmission subframes # m in which the TB retransmission is received within the TB interval_D2DWherein, at said K_D2DThe D2D subframes are connected in sequence to form a logic subframe sequence [ #0, …, # K [ ]_D2D-1]Determining a logical retransmission subframe # m, m ═ k + t × N, N ∈ [1, N-1] according to the logical initial transmission subframe # k and the retransmission interval t]Further, according to the distribution of the D2D subframes in the TB interval, determining a physical retransmission subframe # m corresponding to the logical retransmission subframe # m_D2D。

Optionally, the method further comprises: an obtaining module, configured to obtain the initial transmission subframe index k and/or the retransmission interval t from a received control indication signaling, where the control indication signaling is a device-to-device D2D scheduling configuration signaling or a D2DSAT-RPT signaling.

According to still another aspect of the present invention, there is provided a data transmission system including: the data transmission device comprises a first User Equipment (UE) and a second UE, wherein the first UE comprises the data transmission device, and the second UE comprises the device.

According to the invention, the data channel subframe resources used by one or more times of data block transmission are indicated through the initial transmission subframe index number or the initial transmission subframe index number and the retransmission interval, so that the transmitting terminal UE can effectively indicate the used subframe resources, and the receiving terminal UE can effectively obtain the subframe resource configuration of the data block to be received, thereby achieving the effects of flexibly and efficiently configuring the data channel resources and reducing the indication signaling overhead.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic diagram of a D2D communication structure according to the related art;

fig. 2 is a schematic diagram of a radio frame structure of an LTE system;

fig. 3 is a flowchart of a data transmission method according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a subframe resource configuration indicating transmission of 4 TBs in one SA period according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a subframe resource configuration of TB transmission determined by k and t indication information within a TB interval according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a subframe resource configuration for determining TB transmission within a TB interval according to k and t indication information based on a D2D subframe resource pool configuration in an embodiment of the present invention;

FIG. 7 is a diagram of a subframe resource configuration according to a seventeenth embodiment of the invention;

fig. 8 is a schematic diagram of subframe resource allocation according to eighteen embodiments of the invention;

fig. 9 is a schematic diagram of a subframe resource configuration according to nineteen example embodiments of the invention;

fig. 10 is a schematic diagram of a subframe resource configuration according to an example twenty of the present invention;

FIG. 11 is a schematic diagram of a subframe resource configuration according to example twenty-one of the invention;

FIG. 12 is a diagram of a subframe resource configuration according to twenty-two examples of the invention;

FIG. 13 is a diagram of subframe resource allocation for twenty-three according to an example of the invention;

fig. 14 is a flowchart of a data receiving method according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention;

fig. 16 is a schematic structural diagram of a data receiving apparatus according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

According to an embodiment of the present invention, a data transmission method is provided.

Fig. 3 is a flowchart of a data transmission method according to an embodiment of the present invention, and as shown in fig. 3, the method mainly includes the following steps:

step S302, the first user equipment UE determines the subframe where the data channel resource is located through the initial transmission subframe index number k, or the initial transmission subframe index number k and the retransmission interval t, wherein k and t are non-negative integers.

Step S304, the first UE sends a data transport block TB on a subframe where the data channel resource is located.

In the D2D communication system, data transmission is directly performed between UEs, and a transmitting UE (a first UE) indicates a corresponding D2D data channel resource configuration to one or more receiving UEs (second UEs) through D2D control indication information or system predefined parameters and rules, so that the receiving UEs can determine the D2D data channel resource configuration according to the control indication information or predefined parameters and rules and receive required data on the corresponding D2D data channel resources. The D2D control indication information may also be referred to as Scheduling Assignment (SA) information, and the following example description will take SA as the D2D control indication information as an example.

The D2D communication includes multiple types of resources, such as D2D data channel (Datachannel) resources, D2D discovery channel (discovery channel) resources, D2DSA resources, D2D synchronization channel resources, and so on. The UE at the transmitting end sends SA information on a D2DSA resource (resource), where the SA may include indication information about a data channel resource used by the UE at the transmitting end, and information such as a Radio Network Temporary Identity (RNTI) of the UE at the transmitting end 2D.

The SA resources and the data channel resources are divided in a subframe (subframe) unit in the time domain, D2DSA information is carried on the SAsubframe, and D2D data information is carried on the Datasubframe, so that the D2D data channel resources use one effective SA transmission as a minimum scheduling configuration period, also referred to as an SA period. Within an SA period, a transmitting UE may transmit one or more TBs, where for each TB there is a certain TB interval, that is, a subframe range available for transmitting the TB within the SA period, which corresponds to K subframes in the time domain, where K is a positive integer. The transmitting end UE indicates one or more subframes for transmitting the TB within the K subframes, as shown in fig. 4, the SA period is 40ms, the transmitting end UE transmits 4 TBs within the SA period, the TB interval of each TB is 10ms, K is 10, the transmitting end UE configures 2 transmissions for each TB within the TB interval, performs initial transmission on subframe #0, and performs retransmission on subframe # 4.

The transmitting end UE may configure to transmit each TB once or N times, where each transmission needs to indicate a location of a data subframe where a corresponding data channel is located, so that when the TB is transmitted only once, a subframe, that is, an initial transmission subframe, should be indicated within a TB interval, and the transmitting end UE transmits the TB to be transmitted on the indicated subframe; when the TB is configured to transmit N times, N subframes, including an initial transmission subframe and N-1 retransmission subframes, should be indicated within a TB interval, and the transmitting end UE transmits the TB to be transmitted N times on the indicated subframes.

The transmitting terminal UE indicates a subframe where the data channel resource is located through an initial transmission subframe index number k; or, one or N subframes where the data channel resources are located are indicated by an initial transmission subframe index k and a retransmission interval t, where N is an integer greater than 1, k and t are non-negative integers, and the transmitting end UE indicates, by k and t, a subframe configuration of one TB to be transmitted within a corresponding TB interval.

When available subframes for unrestricted D2D communication in the system, or any system subframe may be used as D2D subframes, the actual physical subframe is directly indicated by the initial transmission subframe index k and the retransmission interval t, i.e.:

the initial transmission subframe index K is used for indicating an initial transmission subframe # K, a starting subframe within a TB interval is marked as a subframe #0, the initial transmission subframe # K is a kth subframe after the starting subframe, and K belongs to [0, K-1 ].

When N transmissions are configured for the TB, the positions of N-1 retransmission subframes # m are further indicated by t on the basis of the initial transmission subframe # k, where m is k + t × N, and N ∈ [1, N-1 ]. The subframe resource configuration of the TB transmission is indicated within the TB interval by k and t, as shown in fig. 5, the number of transmission times N of the TB is 4, the subframe # k is indicated by k as an initial transmission subframe, and further, the subframe corresponding to each t subframe interval is a retransmission subframe starting from the initial transmission subframe # k until the configured number of transmission times is reached.

When D2D subframe resource pool configuration exists in the system, the initial transmission subframe index k and the retransmission interval t are indicated on the basis of a logical subframe sequence formed by sequentially connecting all the configured D2D subframes. The D2D subframe resource pool is predefined or preconfigured by the system, or indicated by a higher layer signaling configuration, and one or more subframes are contained within the TB interval as usable subframes for D2D communication, while D2D data signals can only obtain resource configuration and transmission on the configured D2D subframe.

Configurable K within TB interval range_D2DD2D subframes, and K_D2DK, the configured D2D subframes may be continuous or discrete, with all K_D2DThe sequential connection of the D2D subframes can form a logically continuous D2D subframe sequence, which can be denoted as subframes #0, …, # K_D2D-1。

The initial transmission subframe index k is used to indicate a logical initial transmission subframe # k in the D2D logical subframe sequence, and further, according to the distribution of the D2D subframes in the TB interval, a physical initial transmission subframe # k corresponding to the logical initial transmission subframe # k can be determined_D2D。

When N transmissions are configured for the TB, the position of N-1 logical retransmission subframes # m is indicated by t based on the D2D logical subframe sequence at the logical initial transmission subframe # k, where m is k + t × N, N ∈ [1, N-1]. Further, according to the distribution of the D2D subframes in the TB interval, it may be determined that the physical retransmission subframe # m corresponding to the logical retransmission subframe # m_D2DAs shown in fig. 6, the number of TB transmissions N is 4, in the D2D logical subframe sequence, indicating the logical subframe # k as a logical initial transmission subframe by k, and starting with the logical initial transmission subframe # k, taking the logical subframe corresponding to each t subframe interval as a retransmission subframe, until reaching the configured number of transmissions, and further determining the initial transmission subframe # k corresponding to the logical initial transmission subframe # k according to the corresponding relationship between the D2D logical subframe sequence and the physical subframe_D2DAnd a retransmission subframe # m corresponding to the logical retransmission subframe # m_D2D。

In addition, when the resource configuration of the datasubframe transmitted by each TB is fixedly indicated by k and t, if the transmitting end UE transmits the TB only once, that is, only needs to indicate an initial transmission subframe, the transmitting end UE indicates one used datasubframe by k, at this time, t may be set to a fixed value, or the t value indicates meaningless, or does not indicate the t value, or the t value is null.

The following describes the indication methods of the initial transmission subframe index k and the retransmission interval t, respectively.

Method for indicating initial transmission subframe index number k

The initial transmission subframe index K may also be referred to as an initial transmission subframe offset (subframe offset), and K may be indicated by the transmitting UE through an explicit signaling indication overhead or calculated according to a predefined rule through related information, for example, SA resource information used by the transmitting UE, ID information of the transmitting UE, the number K of D2D subframes included in the TB interval within the number K, TB of subframes included in the TB interval_D2DAnd the number of transmission times N of the TB, etc., can be specifically indicated by the following method.

Method 1

K is indicated in SA by the transmitting terminal UE, the time domain indication information of the data channel resource in SA is T-RPT signaling, the value of K is explicitly indicated by a certain bit overhead in T-RPT, and the maximum value range of K is [0, K-1]]. Or K indicates the logical subframe number in the D2D logical subframe sequence, and the maximum value range of K is [0, K_D2D-1]。

Example one

The system predefines a D2D subframe resource pool, the transmitting terminal UE indicates an initial transmission subframe index number K in the configured D2D subframe resource pool through T-RPT signaling in SA, and K is [0, K ]_D2D-1]Take an arbitrary value, indicate the overhead of k asAt TB intervals K_D2D10 for example, thenFurther, the method can be used for preparing a novel materialAnd, a k value corresponding to the 4bit indication overhead can be defined, as shown in table 1.

Through the displayed indication overhead, the position of the initial transmission subframe of the TB in the TB interval can be controlled very flexibly and effectively, and an arbitrary initial transmission subframe configuration effect is achieved in the configured D2D subframe resource pool.

TABLE 1

Indication bit	k
		0000	0
0001	1
		0010	2
0011	3
		0100	4
0101	5
		0110	6
0111	7
		1000	8
1001	9
		1010-1111	Retention

Example two

The transmitting terminal UE indicates an initial transmission subframe index K through a T-RPT signaling in the SA, and K takes a partial value in a [0, K-1] range, the system predefines to use 3 bits to indicate K, and specifies a relationship between an indication bit and a corresponding value of K, taking K as an example 20, as shown in table 2.

Through the displayed indication overhead, the position of the initial transmission subframe of the TB in the TB interval can be flexibly and effectively controlled, and k takes partial numerical values in all subframes of the TB interval according to the specification, so that on one hand, a flexible initial transmission subframe configuration effect can be achieved, on the other hand, the number of control overhead bits can also be reduced, compared with the method of the first example, the signaling overhead required by the indication k can be reduced, and meanwhile, a certain flexibility requirement is ensured.

TABLE 2

Indication bit	k
		000	0
001	2
		010	4
011	6
		100	8
101	12
		110	16
111	18

Example three

The transmitting terminal UE indicates an initial transmission subframe index number K through T-RPT signaling in the SA, the value range of K is determined by a TB interval K and the transmission times N of the TB, and the value range of the indicated K isAt this time, the transmitting end UE uses no more thanOr log₂When K is 20, for example, when the number of transmission times of TB is configured to be N-4, K ∈ [0, 4]Then the transmitting end UE uses 3 bits to indicate the initial transmission subframe index k, as shown in table 3.

TABLE 3

Indication bit	k
		000	0
001	1
		010	2
011	3
		100	4
101-111	Retention

Example four

The eNB configures a D2D subframe resource pool through a system broadcast signaling, a transmitting terminal UE indicates an initial transmission subframe index number K in the configured D2D subframe resource pool through a T-RPT signaling in the SA, and the value range of K is the D2D subframe number K configured in the TB interval_D2DAnd the transmission times N of the TB, wherein the value range of the indicated k isAt this time, the transmitting end UE uses no more thanOr log₂(K_D2D-1) bit indicates the value of k, and the indicated bit is the binary value corresponding to the value of k. With K_D2DFor example, when the number of TB transmissions is configured to be N-4, k ∈ [0, 4 [ ]]Then the transmitting end UE indicates the initial transmission subframe index k using 3 bits, as shown in table 4.

TABLE 4

Indication bit	k
		000	0
001	1
		010	2
011	3
		100	4
101-111	Retention

Example five

The transmitting terminal UE indicates the initial transmission subframe index number K through the T-RPT signaling in the SA, and the value range of K is formed by TB interval K and TB intervalIs determined, the indicated value range of k isIn this case, the transmitting UE uses no more than 4 bits to indicate the K value, and the indicated bit is the binary value corresponding to the K value, taking K as 80 as an example, when the number of TB transmissions is configured to be N as 4, K ∈ [0, 15 [ ]]Then the transmitting end UE uses 4 bits to indicate the initial transmission subframe index number k, indicating the bit value, i.e. the binary representation corresponding to k.

Method two

K SA resource information used by a transmitting end UE and a TB interval K or the number K of the D2D subframes contained in the TB interval_D2DDetermining:

k is (SAindex) modK, or

k＝(SAindex)modK_D2D

Wherein, saidex represents a resource index number of SAresource used by the UE at the transmitting end.

Example six

The transmitting end UE implicitly indicates an initial transmission subframe index number K through the used SAResourceidex, and the system defines the relationship between the SAindex, the TB interval K and the K value, so that the transmitting end UE can indicate the initial transmission subframe position information of the TB to be transmitted to the receiving end UE without any indication signaling. Here, the saidex refers to a channel index of the SAresource used by the UE at the transmitting end, or an rbidex corresponding to the SAresource, or other numbers or marks capable of uniquely indicating the SAresource.

For example, the SAresource used by the UE to transmit the SA information corresponds to saidex 35, TB interval K10, and K (saidex) modK 5.

The method has the advantages that the index number k of the initial transmission subframe is implicitly indicated, the uniform initial transmission subframe indication effect can be achieved, the initial transmission subframe configuration is ensured to have certain flexibility, the indication signaling does not need to be displayed, and the overhead of indicating the data channel resources can be effectively compressed.

Method III

K number of D2D subframes contained in D2DRNTI and TB interval K or TB interval of transmitting end UE_D2DDetermining:

k is (UED2DRNTI) modK, or

k＝(UED2DRNTI)modK_D2D。

Example seven

The UE at the transmitting end implicitly indicates the initial transmission subframe index number K, the system definition RNTI and the D2D subframe number K by the UE ID of the UE, namely D2DRNTI_D2DAnd the relation between the value and the k value ensures that the transmitting terminal UE can indicate the initial transmission subframe position information of the TB to be transmitted to the receiving terminal UE without any indication signaling. Here, the transmitting UE may indicate its D2DRNTI in the SA information, or may mark its ID information with a D2D synchronization signal or a discovery signal.

For example, K_D2DThe transmitting UE transmits SA information indicating that its RNTI is "1010000111001100" 40, and generally, the RNTI is represented by a 16-bit binary number according to the RNTI and K_D2DWhen k is obtained through calculation, correspondingly converting the RNTI into a decimal number, and further performing calculation according to a relation defined by the system, then:

k＝(RNTI)modK_D2D＝41420mod40＝20。

Method IV

K SA resource information and TB interval K used by a transmitting end UE or the number K of D2D subframes_D2DAnd the transmission number N of TB determines:

that is to say that the first and second electrodes,

k is equal to SAindex and divides K by N by rounding down, or

That is to say that the first and second electrodes,

k equals SAindex to K_D2DDivide by N and round down, then perform modulo operation.

Example eight

The eNB pre-configures a D2D subframe resource pool through high-level signaling, a transmitting terminal UE implicitly indicates an initial transmission subframe index number K through the used SAResourceidex, and a system defines SAindex and the number K of D2D subframes_D2DAnd the relation between the TB transmission times N and the k value ensures that the transmitting terminal UE can indicate the initial transmission subframe position information of the TB to be transmitted to the receiving terminal UE without any indication signaling.

For example, the SAresource used by the UE at the transmitting end corresponds to SAindex of 17, and the number K of D2D subframes_D2D20, the number of TB transmissions N is 4, then

The method has the advantages that the initial transmission subframe is configured in the maximum available D2D subframe range K_D2DIn addition, the influence of the TB transmission times on the subframe configuration is considered, the configuration of the initial transmission subframe is adaptive to the configuration of the transmission times, and a space is reserved for the configuration of the retransmission subframe, so that a uniform and reasonable indication effect of the TB transmission subframe is achieved on the whole, the flexibility and the reasonability of the configuration of the initial transmission subframe are guaranteed, an implicit indication k is also adopted, an indication signaling does not need to be displayed, and the overhead of indicating data channel resources can be effectively compressed.

Method five

k is sent byD2DRNTI, K or D2D subframe number K of transmitting terminal UE_D2DAnd the transmission number N of TB determines:

that is to say that the first and second electrodes,

k is equal to the integer of dividing K by N by UED2DRNTI at the transmitting end and then carrying out modular operation; or

That is to say that the first and second electrodes,

k is equal to the UE D2DRNTI pair K of the transmitting terminal_D2DDivide by N and round down, then perform modulo operation.

Example nine

The transmitting terminal UE implicitly indicates an initial transmission subframe index number k by D2DRNTI, and the system defines the relationship between the RNTI and the transmission times N and k of the TB interval K, TB, so that the transmitting terminal UE can indicate the initial transmission subframe position information of the TB to be transmitted to the receiving terminal UE without any indication signaling.

For example, if the transmission end UERNTI is "0111011011001001", the TB interval K is 40, and the number of TB transmissions N is 4, then

The method has the advantages that on one hand, the initial transmission subframe is configured in the maximum available subframe range K, and in addition, the influence of the TB transmission times on the subframe configuration is considered, so that the configuration of the initial transmission subframe is adaptive to the configuration of the transmission times, and space is reserved for the configuration of the retransmission subframe, thereby achieving a uniform and reasonable indication effect of the TB transmission subframe on the whole, ensuring the flexibility and reasonableness of the configuration of the initial transmission subframe, also being an implicit indication K, not needing to display an indication signaling, and effectively compressing the overhead of indicating the data channel resources.

Method VI

K SA resource information and TB interval K used by a transmitting end UE or the number K of D2D subframes_D2DAnd the transmission times N of the TB, the retransmission interval t is determined as follows:

k is (saidex) mod (K- (N-1) × t), that is,

k is equal to SAindex modulo the difference between K and (N-1) × t, or

k＝(SAindex)mod(K_D2D- (N-1) × t), that is,

k equals SAindex to K_D2DThe difference with (N-1) × t is modulo.

Example ten

The transmitting end UE implicitly indicates an initial transmission subframe index number k through the used SAResourceidex, and the system defines the relationship among the SAindex, the transmission times N of the TB interval K, TB, and the retransmission interval t and the value of k, so that the transmitting end UE can indicate the initial transmission subframe position information of the TB to be transmitted to the receiving end UE without any indication signaling.

For example, the SAresource used by the UE at the transmitting end corresponds to saidex 17, K40, TB transmission number N4, t 5, and K (saidex) mod (K- (N-1) t) 17mod25 17.

The method has the advantages that on one hand, the initial transmission subframe is configured within the maximum available subframe range, in addition, the influence of the TB transmission times on the subframe configuration is considered, the configuration of the initial transmission subframe is adapted to the configuration of the transmission times, and the space is reserved for the configuration of the retransmission subframe, so that the uniform and reasonable indication effect of the TB transmission subframe is achieved on the whole, the flexibility and the reasonability of the configuration of the initial transmission subframe are ensured, the implicit indication k is also used, the indication signaling is not required to be displayed, and the overhead of indicating the data channel resources can be effectively compressed.

Method seven

K number of subframes K of D2DRNTI, K or D2D of transmitting end UE_D2DAnd the transmission times N of the TB, and the retransmission interval t is determined as follows:

k is (UED2DRNTI) mod (K- (N-1) × t), that is,

k is equal to the difference of K and (N-1) × t of the UE D2DRNTI of the transmitting terminal; or

k＝(UED2DRNTI)mod(K_D2D- (N-1) × t), that is,

k is equal to the UE D2DRNTI pair K of the transmitting terminal_D2DThe difference with (N-1) × t is modulo.

Example eleven

The system predefines D2D subframe resource pool, the transmitting terminal UE implicitly indicates the initial transmission subframe index number K by D2DRNTI, the system defines RNTI, K_D2DN, t, and k value, so that the transmitting end UE can indicate the initial subframe position information of the TB to be transmitted to the receiving end UE without any indication signaling.

For example, the transmission end UERNTI is "0110010111111001", the number K of D2D subframes_D2D30, TB transmission number N is 4, t is 4, K is (UED2DRNTI) mod (K)_D2D-(N-1)*t)＝26105mod18＝5。

Method eight

In the various implicit methods for obtaining the initial transmission subframe index k according to the above methods two to seven, the offset indication quantity Δ k can be further used in an overlapping manner as the initial transmission subframe index k finally used, that is, the method

k＝k+△k

The offset indication quantity Δ k is indicated by the transmitting end UE in a control indication signaling, and the control indication signaling is a device-to-device D2D scheduling configuration signaling or a D2DSAT-RPT signaling.

Example twelve

The transmitting end UE implicitly indicates an initial transmission subframe index k through the used SAResourceidex, and indicates the transmission times N, the retransmission interval T and the offset indication amount □ k of the TB interval K, TB with 2bits respectively in the T-RPT signaling. k is implicitly indicated by saprbendex according to a predefined relationship.

And the transmitting terminal UE determines that k is 9 according to the RPBindex of the used SAResource, and the value Δ k indicated by 2bits in the T-RPT is 2, further superposes the value Δ k according to the k value determined by the implicit index relationship, namely k is k + Δ k is 11, and finally, the transmitting terminal UE transmits the TB to be transmitted for the first time by using the initial transmission subframe index k is 11.

Method for indicating retransmission interval t

The retransmission interval t may be indicated by the transmitting UE through an explicit signaling overhead, or determined according to a predefined rule by using related information, or determined in a fixed value of the system, and may specifically be indicated by the following method.

Method 1

T is indicated in SA by the transmitting terminal UE, the time domain indication information of the data channel resource in SA is T-RPT signaling, and the T value is explicitly indicated in T-RPT with a certain bit overhead.

Example thirteen

The transmitting terminal UE indicates the retransmission interval T through T-RPT signaling in SA, the system predefines the corresponding relation between the indication bit and the T value, different corresponding relations can be correspondingly defined for different numbers of indication bit spending, and when the indication spending is 1/2/3/4 bits, the T values of the corresponding indication are respectively shown in table 5, table 6, table 7 and table 8.

The relative position of the TB retransmission subframe and the primary transmission subframe can be flexibly and effectively controlled through the displayed indication overhead, the flexible configuration effect of the retransmission subframe is achieved, the method needs certain control indication bit overhead, and the specific overhead can be determined according to the system requirements.

TABLE 5

1bit indication	t
		0	1
1	4

TABLE 6

2bit indication	t
		00	1
01	2
		10	4

11

8

TABLE 7

3bit indication	t
		000	1
001	2
		010	3
011	4
		100	5
101	6
		110	7
111	8

TABLE 8

4bit indication	t
		0000	1
0001	2
		0010	3
0011	4
		0100	5
0101	6
		0110	7
0111	8
		1000	9
1001	10
		1010-1111	Retention

Method two

t determines a fixed value for the system specification.

For example, if the system fixes the retransmission interval t to 4, the transmitting UE only needs to indicate the initial transmission subframe index k, and further indicates the initial transmission subframe position and the retransmission subframe position where the data channel resource for transmitting the TB is located according to the fixed retransmission interval t to 4.

The method has the advantages that no signaling overhead is needed to indicate the retransmission interval t, the overhead for indicating the data channel resources can be effectively compressed, and the unique fixed t value is beneficial to simplifying the resource scheduling configuration.

Method III

t is indicated by the network side through higher layer signaling configuration. For example, the eNB indicates the retransmission interval t through a system broadcast message SIB or an RRC message, and the value of t indicated through higher layer signaling has a semi-static configuration effect and remains unchanged within a certain time range. Here the network side comprises one or more of the following entities: an evolved node B eNB, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN, and an operation administration and maintenance OAM manager.

Example fourteen

The eNB performs configuration indication on D2 dcommication related resources in an SIB message, where the indicated retransmission interval t is 2, the transmitting end UE indicates an initial transmission subframe index k, and further indicates the initial transmission subframe position and the retransmission subframe position where the data channel resource of the TB is located according to the fixed t being 2.

The method has the advantages that the physical layer signaling overhead is not needed to indicate the retransmission interval t, the overhead indicated by the data channel resources can be effectively compressed, meanwhile, the retransmission interval t can be adjusted in a semi-static mode through high-layer signaling, the value of t has certain configurability, and the uniform value of t of the cell is beneficial to simplifying resource scheduling configuration.

Method IV

And t is determined according to the transmission times N of the TB, and according to the specific value of N, the system predefines the corresponding relation between N and t, thereby determining the specific value of t.

Example fifteen

The system defines the corresponding relationship between N and t, and some examples are shown in tables 9 to 17, so that the transmitting end UE can determine the corresponding t value according to the transmission times N of the TBs and according to the predefined rule.

The method has the advantages that any signaling overhead is not needed to indicate the retransmission interval t, the overhead indicated by the data channel resources can be effectively compressed, and meanwhile, the corresponding retransmission interval t is determined according to the transmission times N of the TB, so that the value of t can change along with the number of required transmission subframes, and the method has strong adaptability and flexibility.

TABLE 9

Number of transmissions N of TB	t
		2	4
4	2
		8	1

Watch 10

Number of transmissions N of TB	t
		2	8
4	4
		8	1

TABLE 11

Number of transmissions N of TB	t
		2	8
4	4
		8	2

TABLE 12

Number of transmissions N of TB	t
		2	3
4	2
		8	1

Watch 13

Number of transmissions N of TB	t
		2	5
4	3

8

2

TABLE 14

Number of transmissions N of TB	t
		2	4
4	1

Watch 15

Number of transmissions N of TB	t
		2	4
4	2

TABLE 16

Number of transmissions N of TB	t
		2	2
4	1

TABLE 17

Number of transmissions N of TB	t
		2	8
4	4

Method five

t number of transmissions N according to TB and TB interval KOr the number K of D2D subframes_D2DIt is determined that,or

Example sixteen

The transmitting terminal UE transmits the TB according to the transmission times N and the TB interval K of the TB based on the predefined relationThe specific value of t is implicitly indicated. For example, when TB interval K is 80, t is 20 when N is 4, and t is 40 when N is 2.

The method has the advantages that any signaling overhead is not needed to indicate the retransmission interval t, the overhead indicated by the data channel resources can be effectively compressed, and meanwhile, the corresponding retransmission interval t is determined according to the transmission times N of the TB and the TB interval K, so that the value of t can be changed along with the required number of transmission subframes and the maximum available number of subframes, and the method has strong adaptability and flexibility.

The above describes various determination methods for the initial transmission subframe index k and the retransmission interval t, and further, the various methods for k and t can be used in any combination without collision, and the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Example seventeen

The transmitting end UE explicitly indicates the initial transmission subframe index k and the retransmission interval t through signaling in the SA, and sends the TB to be transmitted on the indicated datasubframe.

If the transmitting UE indicates in the T-RPT information in the SA that K is 5, T is 4, the TB interval K is 20, and the number of transmission times N of the TB is 4, then the transmitting UE transmits the corresponding data channel subframe resource according to the indication of K and T, as shown in fig. 7, the transmitting UE performs initial transmission of the TB in subframe #5, and performs three retransmissions in subframe #9, #13, and #17, respectively.

Example eighteen

The system pre-configures a D2D subframe resource pool, a transmitting terminal UE indicates a retransmission interval t for a D2D logical subframe sequence in SA through signaling, an initial transmission subframe index K is SAResourceidex used by the transmitting terminal UE and the number K of D2D subframes_D2DThe TB to be transmitted is determined (as described in method two) and sent on the indicated dataconframe.

The saidex of the transmitting UE is 9, T is 3 indicated in the T-RPT information in the SA, and the number K of D2D subframes_D2D16, the number of TB transmissions N is 2, then k is (saidex) modK_D2DWith reference to the indication of t ═ 3, the data channel subframe resource corresponding to the TB transmission is as shown in fig. 8, in the D2D logical subframe sequence, the logical initial transmission subframe is subframe #9, the logical retransmission subframe is subframe #12, and the transmitting end UE performs the initial transmission of the TB in subframe #11 and performs the retransmission in subframe #16 corresponding to the actual physical subframe.

Example nineteen

The initial transmission subframe index K is determined by the SAresourceindex used by the transmitting end UE, the TB interval K, and the transmission frequency N of the TB (as described in method four), the retransmission interval t is determined according to the configured relationship between N and defined in table 9, the transmitting end UE can realize the subframe resource indication of the dataresource without any signaling indication K and t, and transmit the TB to be transmitted on the indicated datasubframe.

The saidex of the UE at the transmitting end is 26, the TB interval K is 40, and the number of TB transmissions N is 4, thenAccording to table 9, t is 2, the data channel subframe resource corresponding to the TB transmission is as shown in fig. 9, and the transmitting UE performs the initial transmission of the TB in subframe #6 and performs three retransmissions in subframe #8, #10, and #12, respectively.

Example twenty

The initial transmission subframe index K is determined by the RNTI of the transmitting end UE, the TB interval K, and the transmission frequency N of the TB (as described in method five), the retransmission interval t is determined according to the configured relationship between N and the table 10, the transmitting end UE can indicate the subframe resource of the data resource without any signaling indication K and t, and the TB to be transmitted is sent on the indicated data subframe.

The RNTI of the transmitting end UE is "0111100000101001", the TB interval K is 40, and the number of TB transmissions N is 8, thenAccording to table 10, t is 1, the data channel subframe resource corresponding to the TB transmission is as shown in fig. 10, and the transmitting UE performs the initial transmission of the TB in subframe #1 and performs seven retransmissions on 7 consecutive subframes from subframe # 2.

Example twenty-one

The transmitting UE explicitly indicates the initial transmission subframe index k in the SA by signaling, wherein,(as described in method one), t is determined according to the transmission times N of the TB and the TB interval K,(as described in method five) and transmits the TB to be transmitted on the indicated dataconframe.

The transmitting end UE indicates in the T-RPT of the SA that the TB interval K is 20, the number of transmission times N of the TB is 2, then T is 10, and the value range of K is K ∈ [0, 9], where the transmitting end UE indicates K is 7. With the indication of k, t, the subframe resource of the data channel corresponding to the TB transmission is as shown in fig. 11, and the transmitting UE performs the initial transmission of the TB in subframe #7 and performs the retransmission in subframe # 17.

(III) comprehensive indication method

Besides the above-described method for determining the initial transmission subframe index k and the retransmission interval t respectively, the following steps may be performed by using unified indication information: the resource allocation index number resource index indicates an initial transmission subframe index number k and a retransmission interval t, the resource index is indicated in a control indication signaling, and the control indication signaling is D2D scheduling configuration signaling or D2DSAT-RPT signaling.

The system predefines a resource configuration table, wherein resource index in the table represents the transmission times N of the TB interval K, TB and the initial transmission subframe index number k (or the initial transmission subframe reference value k)₀) The result of the joint coding, i.e. an arbitrary set of [ K, N, K (K) ]₀)]The value is uniquely corresponding to one resource index. Meanwhile, through controlling the value of i indicated by the indication signaling, a unique group of [ K, N, K (K) ] can be determined based on the resource configuration table₀)]And (4) taking values.

For any combination [ K, N ] of TB intervals and TB transmission times, different initial transmission subframe indices K and retransmission intervals t correspond to different subframe configuration patterns. Because different [ K, N ] have different use effects and corresponding scenes and requirements in the actual system operation, and the applicability and use frequency of various [ K, N ] values are different, in the resource configuration table, different numbers of resource configurations should be defined for different [ K, N ] values, that is, different numbers of subframe configurations are included for different [ K, N ] configurations, so that more commonly used [ K, N ] configurations include more subframe configuration patterns, and less frequently used [ K, N ] configurations can define less subframe configuration patterns in the table, so as to fully utilize the limited resource configuration indication value and provide the effect of flexible and efficient subframe resource indication.

Method 1

The system predefines a resource configuration table, and based on the resource configuration table, the transmitting terminal UE can transmit the data through a unique indication parameter: resource index indicates k and t. The value of the resource configuration table for each i defines the transmission times N of the TB interval K, TB uniquely corresponding to each i, and the initial transmission subframe index k, that is, the K, N and k values can be directly obtained from the resource configuration table through resource index, and further, the retransmission interval t is determined by K, N:

example twenty-two

The predefined resource configuration table of the system is shown in table 18:

watch 18

Resource Index i	TB Interval K	Number of transmissions N of TB	Initial transmission sub-frame index k
				0-9	10	1	i
10-14	10	2	i-10
				15-16	10	4	i-15
17	10	8	i-17
				18-37	20	1	i-18
38-47	20	2	i-38
				48-52	20	4	i-48
53-54	20	8	i-53
				55-94	40	1	i-55
95-114	40	2	i-95
				115-124	40	4	i-115
125-129	40	8	i-125
				130-185	80	1	i-130
186-225	80	2	i-186
				226-245	80	4	i-226
246-255	80	8	i-246

The transmitting UE indicates the resource configuration index i as 117 through signaling in the SA, and then according to the resource configuration table, taking table 18 as an example, the TB interval K as 40, the number of TB transmissions N as 4, the initial transmission subframe index K as 2, and further, the indicated retransmission intervalAs shown in fig. 12, the data channel subframe resource corresponding to the TB transmission is initial transmission of the TB at subframe #2 and three retransmissions at subframe #12, #22 and #32, respectively.

Method two

The system predefines a resource configuration table, and based on the resource configuration table, the transmitting terminal UE can transmit the data through a unique indication parameter: resource index indicates k and t. Resource(s)The configuration table defines, for each value of i, a transmission number N of a TB interval K, TB uniquely corresponding to the value of i, and an initial transmission subframe reference value k₀K, N and k can be directly obtained from the resource configuration table through resource index₀The value is obtained.

In addition, the resource pool of the D2D subframes is predefined or preconfigured by the system or indicated by the network side through high layer signaling, and further, the retransmission interval t is determined by the number K of the D2D subframes in the TB interval_D2DN is determined, and the index number k of the initial transmission subframe is defined by k₀And t determines:

k＝k₀modt。

the retransmission interval t is obtained as above, so that the transmission interval between multiple transmissions of the TB to be transmitted can reach the maximum value in the effective D2D subframe configuration, thereby providing more effective time diversity gain, and the initial transmission subframe index k is obtained as above, so that the initial transmission subframe can be ensured to be the D2D subframe, the position of the initial transmission subframe is determined according to the transmission times and the transmission interval, and an adaptive subframe configuration effect is provided.

Example twenty-three

The predefined resource configuration table of the system is shown in table 19:

watch 19

Resource Index i	TB Interval K	Number of transmissions N of TB	Initial transmission subframe reference value k₀
				0-9	10	1	i
10-14	10	2	i-10
				15-34	20	1	i-15
35-44	20	2	i-35
				45-49	20	4	i-45
50-89	40	1	i-50
				90-109	40	2	i-90
110-119	40	4	i-110
				120-124	40	8	i-120
125-185	80	1	i-125
				186-225	80	2	i-186
226-245	80	4	i-226
				246-255	80	8	i-246

The eNB configures a subframe resource pool D2D through a system broadcast message, the transmitting end UE indicates a resource configuration index i to be 99 in the SA through signaling, and according to the resource configuration table, taking table 19 as an example, the TB interval K to be 40, the transmission frequency N of the TB to be 2, and an initial transmission subframe reference value K₀The D2D subframe configuration within the TB interval is as shown in fig. 13, with the number K of D2D subframes_D2D12. Further, indicated retransmission intervalInitial transmission subframe index k ═ k₀mod t is 3, the data channel subframe resources corresponding to TB transmission are as shown in fig. 13, in the D2D logical subframe sequence, the logical initial transmission subframe is subframe #3, the logical retransmission subframe is subframe #9, and corresponding to the actual physical subframe, the transmitting end UE performs the initial transmission of the TB at subframe #6 and performs the retransmission at subframe # 29.

According to the embodiment of the invention, the invention also provides a data receiving method.

Fig. 14 is a flowchart of a data receiving method according to an embodiment of the present invention, as shown in fig. 14, which mainly includes the following steps:

step S1402, the second UE determines the subframe where the data channel resource is located according to the initial transmission subframe index k or according to the initial transmission subframe index k and the retransmission interval t, where k and t are non-negative integers.

In step S1404, the second UE receives a data transport block TB on a subframe where the data channel resource is located.

In an optional implementation manner of the embodiment of the present invention, the second UE may determine a subframe where the data channel resource is located by using the initial transmission subframe index k; or determining one or N subframes where the data channel resources are located according to the initial transmission subframe index k and the retransmission interval t, wherein N is an integer greater than 1; further, the second UE receives a data transport block, TB, on a subframe where the data channel resource is located; or, the second UE receives N transmissions of the TB on N subframes where the data channel resources are located, where N is the transmission frequency of the TB.

In an optional implementation manner of the embodiment of the present invention, the determining, by the second UE, the subframe where the data channel resource is located includes: and the second UE determines the one or N subframes according to the initial transmission subframe index number K or the initial transmission subframe index number K and the retransmission interval t within a TB interval corresponding to the TB to be received, wherein the TB interval refers to the maximum subframe range which can be used for receiving the TB and comprises K subframes, K is greater than or equal to N, and K is a positive integer.

In an optional implementation manner of the embodiment of the present invention, an initial transmission subframe # K for receiving the TB for the first time within the TB interval is determined by the initial transmission subframe index K, where a starting subframe of the TB interval is denoted as a subframe #0, the initial transmission subframe # K is a kth subframe after the starting subframe, and K is ∈ [0, K-1 ].

In an optional implementation manner of the embodiment of the present invention, N-1 retransmission subframes # m for receiving the TB retransmission within the TB interval may be further determined by the retransmission interval t based on the initial transmission subframe # k, where m is k + t N, and N ∈ [1, N-1 ].

In an optional implementation manner of the embodiment of the present invention, an initial transmission subframe # k for receiving the TB for the first time within the TB interval is determined by the initial transmission subframe index k_D2DWherein K is contained within the TB interval_D2DDevice-to-device D2D subframe, K_D2DLess than or equal to K, adding the K_D2DThe D2D subframes are sequentially connected to form a logic subframe sequence, which is respectively marked as subframes [ #0, …, # K [_D2D-1](ii) a The initial transmission subframe index k indicates a logical initial transmission subframe # k in the logical subframe sequence, and further, according to the distribution of the D2D subframes in the TB interval, a physical initial transmission subframe # k corresponding to the logical initial transmission subframe # k is determined_D2D(ii) a The number K of the D2D subframes contained within the TB interval_D2DAnd subframe location is indicated by system pre-defined or higher layer signaling configuration.

In an optional implementation manner of the embodiment of the present invention, the first transmission subframe # k is based on_D2DDetermining, by the retransmission interval t, N-1 retransmission subframes # m in which the TB retransmission is received within the TB interval_D2DWherein, at said K_D2DThe D2D subframes are connected in sequence to form a logic subframe sequence [ #0, …, # K [ ]_D2D-1]According to the logic initial transmission subframe # k and the retransmission interval tDetermining a logical retransmission subframe # m, m + t N, N ∈ [1, N-1 [ ]]Further, according to the distribution of the D2D subframes in the TB interval, determining a physical retransmission subframe # m corresponding to the logical retransmission subframe # m_D2D。

In an optional implementation manner of the embodiment of the present invention, when the second UE determines a subframe in which the used data channel resource is located according to the initial transmission subframe index k and the retransmission interval t, the retransmission interval t is a fixed value, or the t value indication is meaningless, or the t value indication is not obtained, or the indicated t value is null.

In an optional implementation manner of the embodiment of the present invention, the second UE obtains the initial transmission subframe index k and/or the retransmission interval T from a control indication signaling sent by a first UE, where the control indication signaling is a device-to-device D2D scheduling configuration signaling or a time domain resource pattern transmission (T-RPT) signaling in a D2D scheduling indication SA signaling, and the first UE is a sending end of the control indication signaling and the TB.

In an optional implementation manner of the embodiment of the present invention, the second UE obtains the initial transmission subframe index K in a control indication signaling sent by the first UE, where a maximum value of the initial transmission subframe index K is determined by the TB interval K and the transmission frequency N of the TB, and a value range of the initial transmission subframe index K is greater than or equal to zero and smaller than an integer value obtained by dividing K by N and rounding down; or is more than or equal to zero and is less than K divided by N, and the determined numerical value and the smaller value in 15 are taken down and are integers; or the maximum value of the initial transmission subframe index number K is determined by the number K of the D2D subframes contained in the TB interval_D2DAnd the transmission times N of the TB are determined, and the value range of the initial transmission subframe index number K is more than or equal to zero and less than K_D2DDivide by N a rounded down integer value; or is greater than or equal to zero and less than K_D2DDivide by N to get the exactly determined value and the smaller of 15, take the integer.

In an alternative implementation of the embodiments of the inventionIn this way, the second UE determines the initial transmission subframe index k according to any one or more of the following information: the received resource information of the control indication channel, the ID information of the first UE, the number K of subframes contained in the TB interval, and the number K of D2D subframes contained in the TB interval_D2DThe number of transmission times N of the TB, and the retransmission interval t.

In an optional implementation manner of the embodiment of the present invention, the initial transmission subframe index K is resource information of a control indicator channel used by the first UE and a number K of subframes included in the TB interval or a number K of subframes D2D_D2DDetermining, wherein K is a numerical value obtained by performing modulo operation on K by using a resource index number SAindex of the control indication channel; or K is the resource index number SAindex of the control indication channel to K_D2DAnd performing modulo operation to obtain a numerical value.

In an optional implementation manner of the embodiment of the present invention, the initial transmission subframe index K is defined by an ID of the first UE and a number K of subframes included in the TB interval or a number K of subframes D2D_D2DDetermining, wherein K is a numerical value obtained by performing modulo operation on K by using a Radio Network Temporary Identity (RNTI) or a D2DRNTI of the UE of the first UE; or K is the UERNTI or D2DRNTI pair K of the first UE_D2DAnd performing modulo operation to obtain a numerical value.

In an optional implementation manner of the embodiment of the present invention, the initial transmission subframe index K is resource information of a control indicator channel used by the first UE, a number KK of subframes included in the TB interval, or a number K of subframes D2D_D2DAnd determining the transmission times N of the TB, wherein K is a numerical value obtained by performing modulo operation on a numerical value obtained by dividing K by N and rounding down by SAindex of the control indication channel; or K is SAindex to K of the control indication channel_D2DAnd dividing the numerical value by N to be rounded down, and performing modulo operation to obtain the numerical value.

In an optional implementation manner of the embodiment of the present invention, the initial transmission subframe index k is defined byResource information of a control indication channel used by the first UE, the number K of subframes contained in the TB interval or the number K of D2D subframes_D2DThe number of transmissions N of the TB, and the retransmission interval t, where K is (saidex) mod (K- (N-1) × t); or K ═ SAindex (K) mod (K)_D2D-(N-1)*t)。

In an optional implementation manner of the embodiment of the present invention, the initial transmission subframe index K is defined by an ID of the first UE, a number K of subframes included in the TB interval, or a number K of subframes D2D_D2DAnd determining the transmission times N of the TB, wherein K is a numerical value obtained by performing modulo operation on a numerical value obtained by dividing K by N and rounding down by the UERNTI or D2DRNTI of the first UE; or K is the UERNTI or D2DRNTI pair K of the first UE_D2DAnd dividing the numerical value by N to be rounded down, and performing modulo operation to obtain the numerical value.

In an optional implementation manner of the embodiment of the present invention, the initial transmission subframe index K is defined by an ID of the first UE, a number K of subframes included in the TB interval, or a number K of subframes D2D_D2DThe number of transmissions N of the TB, and the retransmission interval t, where K is (UED2DRNTI) mod (K- (N-1) × t), where UED2DRNTI is UERNTI or D2DRNTI of the first UE; or K ═ UED2DRNTI) mod (K)_D2D-(N-1)*t)。

In an optional implementation manner of the embodiment of the present invention, the initial transmission subframe index k further overlaps an offset indication amount □ k as the updated initial transmission subframe index k, where the offset indication amount □ k is indicated by the first UE in control indication signaling, and the control indication signaling is device-to-device D2D scheduling configuration signaling or D2DSAT-RPT signaling.

In an optional implementation manner of the embodiment of the present invention, the second UE receives 1, 2, 3, or 4bit information from a control indication signaling of the first UE, and indicates the retransmission interval t.

In an optional implementation manner of the embodiment of the present invention, the retransmission interval t is a unique fixed value and is determined by a system specification; or, the retransmission interval t is indicated by a network side through a high layer signaling configuration, where the network side includes one or more of the following entities: an evolved node B eNB, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN, and an operation administration and maintenance OAM manager.

In an optional implementation manner of the embodiment of the present invention, the retransmission interval t is determined according to the transmission frequency N of the TB, and a specific value of the retransmission interval t may be uniquely determined according to a specific value of N and a predefined rule.

In an optional implementation manner of the embodiment of the present invention, a predefined rule for determining the retransmission interval t according to the transmission times N of the TB is as follows:

when N is 2, t is 4, when N is 4, t is 2, when N is 8, t is 1; or,

when N is 2, t is 8, N is 4, t is 4, and when N is 8, t is 1; or,

when N is 2, t is 8, N is 4, t is 4, and when N is 8, t is 2; or,

when N is 2, t is 3, N is 4, t is 2, when N is 8, t is 1; or,

when N is 2, t is 5, N is 4, t is 3, when N is 8, t is 2; or,

when N is 2, t is 4, when N is 4, t is 1, or

When N is 2, t is 4, when N is 4, t is 2, or

When N is 2, t is 2, when N is 4, t is 1, or

When N is 2, t is 8, and when N is 4, t is 4.

In an optional implementation manner of the embodiment of the present invention, the retransmission interval t is according to the TB interval K or the number K of D2D subframes_D2DAnd the number of transmissions N of said TB is determined, whichWherein the retransmission interval t is equal to K divided by an integer value rounded down by N; or the retransmission interval t is equal to K_D2DDivided by an integer value rounded down by N.

In an optional implementation manner of the embodiment of the present invention, the second UE determines the initial transmission subframe index k and the retransmission interval t according to a resource configuration index k indicated in a control indication signaling sent by the first UE and a predefined resource configuration table.

In an optional implementation manner of the embodiment of the present invention, the control indication signaling is a scheduling configuration signaling or a D2DSAT-RPT signaling for the device-to-device D2D.

In an optional implementation manner of the embodiment of the present invention, a TB interval K corresponding to the resource configuration index i, a transmission frequency N of the TB, and an initial transmission subframe index K are specified in the resource configuration table, and further, the retransmission interval t is determined according to the TB interval K and the transmission frequency N of the TB, where t is equal to an integer value obtained by dividing K by N and rounding down.

In an optional implementation manner of the embodiment of the present invention, the resource configuration table specifies a TB interval K corresponding to the resource configuration index i, the number of transmission times N of the TB, and an initial transmission subframe reference value K₀Further, the retransmission interval t is determined according to the number K of D2D subframes included in the TB interval_D2DAnd the number of transmissions N of said TB, where t equals K_D2DDivide by N a rounded down integer value; the index number k of the initial transmission subframe is according to the retransmission interval t and the reference value k of the initial transmission subframe₀Is determined, where k equals k₀And carrying out modular operation on t to obtain a numerical value.

According to the embodiment of the present invention, there is also provided a data transmission apparatus, which corresponds to the data transmission method and can complete data transmission according to the description of the method.

Fig. 15 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention, as shown in fig. 15, the data transmission apparatus mainly includes: a determining module 1502, configured to determine a subframe where a data channel resource is located according to an initial transmission subframe index k, or the initial transmission subframe index k and a retransmission interval t, where k and t are non-negative integers; a sending module 1504, configured to send a data transport block TB on a subframe where the data channel resource is located.

In an optional implementation manner of the embodiment of the present invention, the determining module is configured to determine a subframe in which the data channel resource is located according to the initial transmission subframe index k or determine N subframes in which the data channel resource is located according to the initial transmission subframe index k and a retransmission interval t, where N is an integer greater than 0; the sending module is configured to send the TB on one subframe where the data channel resource is located or send the TB N times on the N subframes where the data channel resource is located, where N is the number of sending times of the TB.

In an optional implementation manner of the embodiment of the present invention, the determining module is configured to determine a subframe in which the data channel resource is located according to the initial transmission subframe index k; or determining N subframes where data channel resources are located through the initial transmission subframe index number k and the retransmission interval t, wherein N is an integer greater than 0; the sending module is used for sending the TB on a subframe where the data channel resource is located; or sending the TB for N times on the N subframes where the data channel resources are located, wherein N is the sending times of the TB.

In an optional implementation of the embodiment of the present invention, the apparatus further comprises: an indicating module, configured to indicate the initial transmission subframe index k and/or the retransmission interval t in a control indication signaling, where the control indication signaling is a device-to-device D2D scheduling configuration signaling or a D2DSAT-RPT signaling.

In an optional implementation manner of the embodiment of the present invention, the determining module is configured to determine, by using the initial transmission subframe index K, an initial transmission subframe # K for transmitting the TB for the first time within a TB interval, where a starting subframe of the TB interval is denoted as a subframe #0, the initial transmission subframe # K is a kth subframe after the starting subframe, and K is equal to [0, K-1], and K is the TB interval.

In an optional implementation manner of the embodiment of the present invention, the determining module is further configured to determine, based on the initial transmission subframe # k, N-1 retransmission subframes # m for repeatedly transmitting the TB within the TB interval through the retransmission interval t, where N is the transmission number of the TB, and m is k + t N, and N is e [1, N-1 ].

In an optional implementation manner of the embodiment of the present invention, the determining module is configured to determine, according to the initial transmission subframe index k, an initial transmission subframe # k for transmitting the TB for the first time within the TB interval_D2DWherein K is contained within the TB interval_D2DDevice-to-device D2D subframe, K_D2DLess than or equal to K, adding the K_D2DThe D2D subframes are sequentially connected to form a logic subframe sequence, which is respectively marked as subframes [ #0, …, # K [_D2D-1]Wherein the initial transmission subframe index k indicates a logical initial transmission subframe # k in the logical subframe sequence, and then a physical initial transmission subframe # k corresponding to the logical initial transmission subframe # k is determined according to the distribution of the D2D subframes in the TB interval_D2D(ii) a The number K of the D2D subframes contained within the TB interval_D2DAnd subframe location is indicated by system pre-defined or higher layer signaling configuration.

In an optional implementation manner of the embodiment of the present invention, the determining module is further configured to determine whether to transmit the subframe # k based on the first transmission subframe # k_D2DDetermining, by the retransmission interval t, N-1 retransmission subframes # m in which the TB is repeatedly transmitted within the TB interval_D2DWherein, at said K_D2DThe D2D subframes are connected in sequence to form a logic subframe sequence [ #0, …, # K [ ]_D2D-1]Determining a logical retransmission subframe # m, m ═ k + t × N, N ∈ [1, N-1] according to the logical initial transmission subframe # k and the retransmission interval t]Further, according to the distribution of the D2D subframes in the TB interval, the physical retransmission subframe # m corresponding to the logical retransmission subframe # m is determinedRetransmission subframe # m_D2D。

According to an embodiment of the present invention, there is also provided a data receiving apparatus, which corresponds to the data receiving apparatus and is configured to implement the data receiving method

Fig. 16 is a schematic structural diagram of a data receiving apparatus according to an embodiment of the present invention, as shown in fig. 16, mainly including: a determining module 1602, configured to determine a subframe where a data channel resource is located according to an initial transmission subframe index k, or according to the initial transmission subframe index k and a retransmission interval t, where k and t are non-negative integers; a receiving module 1604, configured to receive a data transport block TB on a subframe where the data channel resource is located.

In an optional implementation manner of the embodiment of the present invention, the determining module is configured to determine a subframe in which the data channel resource is located according to the initial transmission subframe index k or determine N subframes in which the data channel resource is located according to the initial transmission subframe index k and the retransmission interval t, where N is an integer greater than 0; the receiving module is used for receiving a data transmission block TB on a subframe where the data channel resources are located; or receiving the transmission times of the TB for N times on N subframes where the data channel resources are located, wherein N is the transmission times of the TB.

In an optional implementation manner of the embodiment of the present invention, the determining module is configured to determine, within a TB interval corresponding to the TB to be received, a subframe where the data channel resource is located according to the initial transmission subframe index K, or the initial transmission subframe index K and the retransmission interval t, where the TB interval is a maximum subframe range that can be used for receiving the TB and includes K subframes, K is greater than or equal to N, and K is a positive integer.

In an optional implementation manner of the embodiment of the present invention, the determining module is configured to determine, by using the initial transmission subframe index K, an initial transmission subframe # K for receiving the TB for the first time within a TB interval, where a starting subframe of the TB interval is denoted as a subframe #0, the initial transmission subframe # K is a kth subframe after the starting subframe, and K ∈ [0, K-1 ].

In an optional implementation manner of the embodiment of the present invention, the determining module is further configured to determine, based on the initial transmission subframe # k, N-1 retransmission subframes # m for receiving the TB retransmission within the TB interval through the retransmission interval t, where m is k + t N, and N is e [1, N-1 ].

In an optional implementation manner of the embodiment of the present invention, the determining module is configured to determine, according to the initial transmission subframe index k, an initial transmission subframe # k for receiving the TB for the first time within the TB interval_D2DWherein K is contained within the TB interval_D2DDevice-to-device D2D subframe, K_D2DLess than or equal to K, adding the K_D2DThe D2D subframes are sequentially connected to form a logic subframe sequence, which is respectively marked as subframes [ #0, …, # K [_D2D-1](ii) a The initial transmission subframe index k indicates a logical initial transmission subframe # k in the logical subframe sequence, and further, according to the distribution of the D2D subframes in the TB interval, a physical initial transmission subframe # k corresponding to the logical initial transmission subframe # k is determined_D2D(ii) a The number K of the D2D subframes contained within the TB interval_D2DAnd subframe location is indicated by system pre-defined or higher layer signaling configuration.

In an optional implementation manner of the embodiment of the present invention, the determining module is further configured to determine whether to transmit the subframe # k based on the first transmission subframe # k_D2DDetermining, by the retransmission interval t, N-1 retransmission subframes # m in which the TB retransmission is received within the TB interval_D2DWherein, at said K_D2DThe D2D subframes are connected in sequence to form a logic subframe sequence [ #0, …, # K [ ]_D2D-1]Determining a logical retransmission subframe # m, m ═ k + t × N, N ∈ [1, N-1] according to the logical initial transmission subframe # k and the retransmission interval t]Further, according to the distribution of the D2D subframes in the TB interval, determining a physical retransmission subframe # m corresponding to the logical retransmission subframe # m_D2D。

In an optional implementation manner of the embodiment of the present invention, the apparatus may further include: an obtaining module, configured to obtain the initial transmission subframe index k and/or the retransmission interval t from a control indication signaling, where the control indication signaling is a device-to-device D2D scheduling configuration signaling or a D2DSAT-RPT signaling.

According to an embodiment of the present invention, there is also provided a data transmission system, including: the first UE includes the data transmitting apparatus, and the second UE includes the data receiving apparatus.

From the above description, it can be seen that, in the embodiment of the present invention, the data channel subframe resources used for one or more transmissions of the data block are indicated by the initial transmission subframe index number, or the initial transmission subframe index number and the retransmission interval, so that the transmitting end UE can effectively indicate the used subframe resources, and the receiving end UE can effectively obtain the subframe resource configuration of the data block to be received, thereby achieving the effects of flexibly and efficiently configuring the data channel resources and reducing the indication signaling overhead.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A data transmission method, comprising:

the method comprises the steps that first User Equipment (UE) determines a subframe where data channel resources are located through an initial transmission subframe index number k, or the initial transmission subframe index number k and a retransmission interval t, wherein k and t are non-negative integers;

and the first UE sends a data transmission block TB on the subframe where the data channel resource is located.

2. The method of claim 1,

the first user equipment UE determines a subframe where the data channel resource is located through the initial transmission subframe index k; the first UE sends the TB on a subframe where the data channel resources are located; or

The first user equipment UE determines N subframes where data channel resources are located through the initial transmission subframe index k and the retransmission interval t, wherein N is an integer larger than 0; and the first UE transmits the TB for N times on the N subframes where the data channel resources are located, wherein N is the transmission times of the TB.

3. The method of claim 1, further comprising: and the first UE indicates a subframe where the data channel resource is located within a TB interval corresponding to the TB to be sent, wherein the TB interval is the maximum subframe range which can be used for sending the TB and comprises K subframes, and K is a positive integer which is more than or equal to the sending times of the TB.

4. The method of claim 1, wherein the determining, by the first UE, the subframe in which the data channel resource is located comprises: and the first UE determines an initial transmission subframe # K for transmitting the TB for the first time within the TB interval according to the initial transmission subframe index K, wherein the initial subframe of the TB interval is marked as a subframe #0, the initial transmission subframe # K refers to the kth subframe after the initial subframe, K belongs to [0, K-1], and K is the TB interval.

5. The method of claim 4, wherein the first UE determining the subframe in which the data channel resource is located further comprises: and the first UE determines N-1 retransmission subframes # m for repeatedly transmitting the TB within the TB interval through the retransmission interval t based on the initial transmission subframe # k, wherein N is the transmission times of the TB, and m is k + t N and N belongs to [1, N-1 ].

6. The method of claim 1, wherein the determining, by the first UE, the subframe in which the data channel resource is located comprises:

the first UE determines a first transmission subframe # k for transmitting the TB for the first time within the TB interval according to the initial transmission subframe index k_D2DWherein K is contained within the TB interval_D2DDevice-to-device D2D subframe, K_D2DLess than or equal to K, adding the K_D2DThe D2D subframes are sequentially connected to form a logic subframe sequence, which is respectively marked as subframes [ #0, …, # K [_D2D-1]Wherein the initial transmission subframe index k indicates a logical initial transmission subframe # k in the logical subframe sequence, and then a physical initial transmission subframe # k corresponding to the logical initial transmission subframe # k is determined according to the distribution of the D2D subframes in the TB interval_D2D(ii) a The number K of the D2D subframes contained within the TB interval_D2DAnd subframe location is indicated by system pre-defined or higher layer signaling configuration.

7. The method of claim 6, wherein the first UE determines a subframe in which the data channel resource is located, further comprising: the first UE based on the initial transmission subframe # k_D2DDetermining, by the retransmission interval t, N-1 retransmission subframes # m in which the TB is repeatedly transmitted within the TB interval_D2DWherein, at said K_D2DThe D2D subframes are connected in sequence to form a logic subframe sequence [ #0, …, # K [ ]_D2D-1]Determining a logical retransmission subframe # m, m ═ k + t × N, N ∈ [1, N-1] according to the logical initial transmission subframe # k and the retransmission interval t]Further, according to the distribution of the D2D subframes in the TB interval, determining a physical retransmission subframe # m corresponding to the logical retransmission subframe # m_D2D。

8. The method according to claim 1, wherein in case of determining a subframe where the used data channel resource is located by an initial transmission subframe index k and a retransmission interval t, the retransmission interval t is set to a fixed value, or the t value indicates meaningless, or does not indicate the t value, or the t value is null.

9. The method of claim 1, further comprising: the first UE indicates the initial transmission subframe index k and/or the retransmission interval T in a control indication signaling, wherein the control indication signaling is time domain resource pattern transmission T-RPT information in device-to-device D2D scheduling configuration signaling or D2D scheduling indication SA signaling.

10. The method of claim 9, wherein the first UE indicates the retransmission interval t by 1 or 2 or 3 or 4bit indication signaling.

11. The method of any of claims 1-7, further comprising: the first UE indicates the initial transmission subframe index k in control indication signaling, wherein,

the indicated maximum value of the initial transmission subframe index number K is determined by a TB interval K and the transmission times N of the TB, and the value range of the initial transmission subframe index number K is an integer value which is larger than or equal to zero and smaller than K divided by N and rounded downwards; or is more than or equal to zero and is less than K divided by N, and the determined numerical value and the smaller value in 15 are taken down and are integers; or,

the indicated maximum value of the initial transmission subframe index K is determined by the number K of D2D subframes contained in the TB interval_D2DAnd the transmission times N of the TB are determined, and the value range of the initial transmission subframe index number K is more than or equal to zero and less than K_D2DDivide by N a rounded down integer value; or is greater than or equal to zero and less than K_D2DDivide by N to get the exactly determined value and the smaller of 15, take the integer.

12. The method of claim 1, wherein the initial transmission subframe index k is determined according to at least one of the following information: the first UE usesThe resource information of the control indication channel, the ID information of the first UE, the number K of subframes included in a TB interval, and the number K of D2D subframes included in the TB interval_D2DThe transmission times N of the TBs, and the retransmission interval t.

13. The method of claim 12, wherein the initial transmission subframe index K is used by the first UE for resource information of a control indicator channel and the number of subframes K contained in the TB interval or the number of subframes K of D2D_D2DDetermining, wherein,

k is a numerical value obtained by performing modular operation on K by using the resource index number SAindex of the control indication channel; or

K is the resource index number SAindex of the control indication channel to K_D2DAnd performing modulo operation to obtain a numerical value.

14. The method of claim 12, wherein the initial transmission subframe index K is defined by the first UE ID and the number of subframes K contained in the TB interval or the number of D2D subframes K_D2DDetermining, wherein,

k is a numerical value obtained by performing modular operation on K by the UE radio network temporary identifier RNTI or the D2DRNTI of the first UE; or

K is the UERNTI or D2DRNTI pair K of the first UE_D2DAnd performing modulo operation to obtain a numerical value.

15. The method of claim 12, wherein the initial transmission subframe index K is used by the first UE for resource information of a control indication channel, the number of subframes K included in the TB interval, or the number of D2D subframes K_D2DAnd the number of transmissions N of the TB, wherein,

k is a numerical value obtained by performing modular operation on a numerical value obtained by dividing K by N and rounding down by using the resource index number SAindex of the control indication channel; or

K is the resource index number SAindex of the control indication channel to K_D2DIs divided byAnd N is a numerical value obtained by performing modulo operation on the numerical value obtained by rounding down.

16. The method of claim 12, wherein the initial transmission subframe index K is used by the first UE for resource information of a control indication channel, the number of subframes K included in the TB interval, or the number of D2D subframes K_D2DThe number of transmissions N of the TB, and the retransmission interval t, wherein,

k is (saidex) mod (K- (N-1) × t), where saidex is a resource index number of the control indication channel; or

k＝(SAindex)mod(K_D2D-(N-1)*t)。

17. The method of claim 12, wherein the initial transmission subframe index K is defined by an ID of the first UE, a number K of subframes included in the TB interval, or the number K of D2D subframes_D2DAnd the number of transmissions N of the TB, wherein,

k is a numerical value obtained by performing modulo operation on a numerical value obtained by dividing K by N by a numerical value obtained by downward rounding of the UERNTI or the D2DRNTI of the first UE; or

K is the UERNTI or D2DRNTI pair K of the first UE_D2DAnd dividing the numerical value by N to be rounded down, and performing modulo operation to obtain the numerical value.

18. The method of claim 12, wherein the initial transmission subframe index K is defined by an ID of the first UE, a number K of subframes included in the TB interval, or the number K of D2D subframes_D2DThe number of transmissions N of the TB, and the retransmission interval t, wherein,

k ═ UE 2DRNTI) mod (K- (N-1) × t), UE D2DRNTI being UE rnti or D2DRNTI of the first UE; or

k＝(UED2DRNTI)mod(K_D2D-(N-1)*t)。

19. The method of any one of claims 12-18, the initial transmission subframe index k further superimposing an offset indication amount ak as the updated initial transmission subframe index k, wherein the offset indication amount ak is indicated by the first UE in control indication signaling, the control indication signaling being device-to-device D2D scheduling configuration signaling or D2D scheduling indication SA signaling time domain resource pattern transmission T-RPT signaling.

20. The method of claim 1, wherein the retransmission interval t is a unique fixed value determined by a system specification; or, the retransmission interval t is indicated by a network side through a high layer signaling configuration, where the network side includes one or more of the following entities: an evolved node B eNB, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN, and an operation administration and maintenance OAM manager.

21. The method of claim 1, the retransmission interval t is determined according to a predefined rule and the number of transmissions, N, of the TB.

22. The method of claim 21 wherein the predefined rule for determining the retransmission interval t based on the number of transmissions N of the TB comprises at least one of:

when N is 2, t is 4, when N is 4, t is 2, when N is 8, t is 1; or,

when N is 2, t is 8, N is 4, t is 4, and when N is 8, t is 1; or,

when N is 2, t is 8, N is 4, t is 4, and when N is 8, t is 2; or,

when N is 2, t is 3, N is 4, t is 2, when N is 8, t is 1; or,

when N is 2, t is 5, N is 4, t is 3, when N is 8, t is 2; or,

when N is 2, t is 4, when N is 4, t is 1, or

When N is 2, t is 4, when N is 4, t is 2, or

When N is 2, t is 2, when N is 4, t is 1, or

When N is 2, t is 8, and when N is 4, t is 4.

23. The method of claim 1, wherein the retransmission interval t is determined according to a TB interval K or a number K of D2D subframes contained in the TB interval_D2DAnd the number of transmissions N of the TB, wherein,

the retransmission interval t is equal to K divided by an integer value rounded down by N; or

The retransmission interval t is equal to K_D2DDivided by an integer value rounded down by N.

24. The method of claim 1, wherein the initial transmission subframe index k and the retransmission interval t are determined by a resource configuration index ResourceIndexi indicated by the first UE in control indication signaling and a predefined resource configuration table.

25. The method of claim 24, wherein the control indication signaling schedules configuration signaling for device-to-device D2D, or D2DSAT-RPT signaling.

26. The method of claim 24, wherein the resource allocation index i in the resource allocation table is the TB interval K, the number of transmissions N of the TB, and an initial transmission subframe index K or an initial transmission subframe reference value K₀The joint coding of (a) indicates the value, i.e.,

the resource allocation index i uniquely corresponds to one TB interval K, the transmission times N of the TB, the initial transmission subframe index K or the initial transmission subframe reference value K₀。

27. The method of claim 26 wherein different values of the combination [ K, N ] of the TB interval and the number of transmissions of the TB correspond to different numbers of the resource allocation index i.

28. The method of claim 24,

a TB interval K corresponding to the resource configuration index i, the transmission times N of the TB and an initial transmission subframe index K are defined in the resource configuration table; and the retransmission interval t is determined according to the TB interval K and the transmission times N of the TB, wherein t is an integer value obtained by dividing K by N and rounding down.

29. The method of claim 24,

the resource allocation table defines a TB interval K corresponding to the resource allocation index i, the transmission times N of the TB, and an initial transmission subframe reference value K₀；

The retransmission interval t is determined according to the number K of D2D sub-frames contained in the TB interval_D2DAnd the number of transmissions N of said TB, where t equals K_D2DDivide by N a rounded down integer value;

the index number k of the initial transmission subframe is according to the retransmission interval t and the reference value k of the initial transmission subframe₀Is determined, where k equals k₀And carrying out modular operation on t to obtain a numerical value.

30. A data receiving method, comprising:

the second user equipment UE determines the subframe where the data channel resource is located through an initial transmission subframe index number k or the initial transmission subframe index number k and a retransmission interval t, wherein k and t are non-negative integers;

and the second UE receives a data transmission block TB on the subframe where the data channel resource is located.

31. The method of claim 30,

the second User Equipment (UE) determines a subframe where the data channel resource is located through the initial transmission subframe index number k, and receives a data Transmission Block (TB) on the subframe where the data channel resource is located; or,

and the second User Equipment (UE) determines N subframes where the data channel resources are located through the initial transmission subframe index k and the retransmission interval t, wherein N is an integer larger than 0, and receives the N transmissions of the TB on the N subframes where the data channel resources are located, and N is the transmission times of the TB.

32. The method of claim 30, wherein the determining, by the second UE, the subframe in which the data channel resource is located comprises: and the second UE determines a subframe where the data channel resource is located according to the initial transmission subframe index number K or the initial transmission subframe index number K and the retransmission interval t within a TB interval corresponding to the TB to be received, wherein the TB interval is the maximum subframe range which can be used for receiving the TB and comprises K subframes, K is greater than or equal to N, and K is a positive integer.

33. The method of claim 30, wherein the second UE determining the subframe in which the data channel resource is located comprises: and the second UE determines an initial transmission subframe # K for receiving the TB for the first time within the TB interval according to the initial transmission subframe index number K, wherein the initial transmission subframe # K of the TB interval is marked as a subframe #0, the initial transmission subframe # K is the kth subframe after the initial subframe, and K belongs to [0, K-1 ].

34. The method of claim 33, wherein the second UE determines a subframe in which the data channel resource is located, further comprising: determining, based on the initial transmission subframe # k, N-1 retransmission subframes # m for receiving the TB retransmission within the TB interval, where m is k + t N, and N e [1, N-1], through the retransmission interval t.

35. The method of claim 30, wherein the step of determining the target position is performed by a computerIn that, the determining, by the second UE, the subframe where the data channel resource is located includes: the second UE determines an initial transmission subframe # k for receiving the TB for the first time within the TB interval according to the initial transmission subframe index k_D2DWherein K is contained within the TB interval_D2DDevice-to-device D2D subframe, K_D2DLess than or equal to K, adding the K_D2DThe D2D subframes are sequentially connected to form a logic subframe sequence, which is respectively marked as subframes [ #0, …, # K [_D2D-1](ii) a The initial transmission subframe index k indicates a logical initial transmission subframe # k in the logical subframe sequence, and further, according to the distribution of the D2D subframes in the TB interval, a physical initial transmission subframe # k corresponding to the logical initial transmission subframe # k is determined_D2D(ii) a The number K of the D2D subframes contained within the TB interval_D2DAnd subframe location is indicated by system pre-defined or higher layer signaling configuration.

36. The method of claim 35, wherein the second UE determines a subframe in which the data channel resource is located, further comprising: the second UE based on the first transmission subframe # k_D2DDetermining, by the retransmission interval t, N-1 retransmission subframes # m in which the TB retransmission is received within the TB interval_D2DWherein, at said K_D2DThe D2D subframes are connected in sequence to form a logic subframe sequence [ #0, …, # K [ ]_D2D-1]Determining a logical retransmission subframe # m, m ═ k + t × N, N ∈ [1, N-1] according to the logical initial transmission subframe # k and the retransmission interval t]Further, according to the distribution of the D2D subframes in the TB interval, determining a physical retransmission subframe # m corresponding to the logical retransmission subframe # m_D2D。

37. The method of claim 30, wherein when the second UE determines a subframe in which the used data channel resource is located according to the initial transmission subframe index k and the retransmission interval t, the retransmission interval t is a fixed value, or the t value indicates meaningless, or the t value indication is not obtained, or the indicated t value is null.

38. The method of claim 30, wherein the second UE obtains the initial transmission subframe index k and/or the retransmission interval T in a control indication signaling sent by a first UE, and wherein the control indication signaling is device-to-device D2D scheduling configuration signaling or D2D scheduling indication (SA) signaling for time domain resource pattern transmission (T-RPT) signaling, and wherein the first UE is a sender of the control indication signaling and the TB.

39. The method according to any of claims 30-36, the second UE obtaining the initial transmission subframe index k from the control indication signaling, wherein,

the maximum value of the initial transmission subframe index number K is determined by the TB interval K and the transmission times N of the TB, and the value range of the initial transmission subframe index number K is an integer value which is larger than or equal to zero and smaller than K divided by N and rounded downwards; or is more than or equal to zero and is less than K divided by N, and the determined numerical value and the smaller value in 15 are taken down and are integers; or,

the maximum value of the initial transmission subframe index K is determined by the number K of the D2D subframes contained in the TB interval_D2DAnd the transmission times N of the TB are determined, and the value range of the initial transmission subframe index number K is more than or equal to zero and less than K_D2DDivide by N a rounded down integer value; or is greater than or equal to zero and less than K_D2DDivide by N to get the exactly determined value and the smaller of 15, take the integer.

40. The method of claim 30, wherein the second UE determines the initial transmission subframe index k according to at least one of: the received resource information of the control indication channel, the ID information of the first UE, the number K of subframes contained in the TB interval, and the number K of D2D subframes contained in the TB interval_D2DThe number of transmission times N of the TB, and the retransmission interval t.

41. The method of claim 40, wherein the initial transmission subframe index K is determined by the number of subframes K or the number of subframes K of D2D included in the TB interval and the resource information of the control indicator channel received_D2DDetermining, wherein,

42. The method of claim 40, wherein the initial transmission subframe index K is defined by the ID of the first UE and the number K of subframes contained in the TB interval or the number K of D2D subframes_D2DDetermining, wherein,

43. The method of claim 40, wherein the initial transmission subframe index K is used by the first UE for resource information of a control indicator channel, the number of subframes KK included in the TB interval, or the number of D2D subframes K_D2DAnd the number of transmissions N of the TB, wherein,

K is the resource index number SAindex of the control indication channel to K_D2DAnd dividing the numerical value by N to be rounded down, and performing modulo operation to obtain the numerical value.

44. The method of claim 40, wherein the initial transmission subframe index k is caused by the first UEResource information of a control indication channel, the number K of subframes contained in the TB interval or the number K of D2D subframes_D2DThe number of transmissions N of the TB, and the retransmission interval t, wherein,

k＝(SAindex)mod(K_D2D-(N-1)*t)。

45. The method of claim 40, wherein the initial transmission subframe index K is defined by an ID of the first UE, a number of subframes K included in the TB interval, or the number of subframes K of D2D_D2DAnd the number of transmissions N of the TB, wherein,

46. The method of claim 40, wherein the initial transmission subframe index K is defined by an ID of the first UE, a number of subframes K included in the TB interval, or the number of subframes K of D2D_D2DThe number of transmissions N of the TB, and the retransmission interval t, wherein,

k ═ K (UED2DRNTI) mod (K- (N-1) × t), where UED2DRNTI is UED rnti or D2DRNTI of the first UE; or

k＝(UED2DRNTI)mod(K_D2D-(N-1)*t)。

47. The method of any of claims 40-46, the initial transmission subframe index k further superimposing an offset indication amount Δ k as the updated initial transmission subframe index k, wherein the offset indication amount Δ k is indicated by the first UE in control indication signaling, the control indication signaling being device-to-device D2D scheduling configuration signaling, or D2DSAT-RPT signaling.

48. The method of claim 38, wherein the second UE receives information indicating the retransmission interval t by 1, 2, 3, or 4 bits from a control indication signaling sent by the first UE.

49. The method of claim 30, the retransmission interval t is a unique fixed value, determined by a system specification; or, the retransmission interval t is indicated by a network side through a high layer signaling configuration, where the network side includes at least one of the following entities: an evolved node B eNB, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN, and an operation administration and maintenance OAM manager.

50. The method of claim 30 wherein the retransmission interval t is determined according to a predefined rule and a number of transmissions, N, of the TB.

51. The method according to claim 50, wherein the predefined rule for determining the retransmission interval t based on the number of transmissions N of the TB comprises at least one of:

when N is 2, t is 4, when N is 4, t is 2, when N is 8, t is 1; or,

when N is 2, t is 8, N is 4, t is 4, and when N is 8, t is 1; or,

when N is 2, t is 8, N is 4, t is 4, and when N is 8, t is 2; or,

when N is 2, t is 3, N is 4, t is 2, when N is 8, t is 1; or,

when N is 2, t is 5, N is 4, t is 3, when N is 8, t is 2; or,

when N is 2, t is 4, when N is 4, t is 1, or

When N is 2, t is 4, when N is 4, t is 2, or

When N is 2, t is 2, when N is 4, t is 1, or

When N is 2, t is 8, and when N is 4, t is 4.

52. The method of claim 30, wherein the retransmission interval t is determined according to a TB interval K or a number K of D2D subframes contained within the TB interval_D2DAnd the number of transmissions N of the TB, wherein,

53. The method of claim 30, wherein the second UE determines the initial transmission subframe index k and the retransmission interval t according to a resource configuration index resourceindenxi indicated in the control indication signaling and a predefined resource configuration table.

54. The method of claim 53, wherein the control indication signaling schedules configuration signaling for device-to-device D2D, or D2DSAT-RPT signaling.

55. The method of claim 53, wherein the resource allocation index i in the resource allocation table is the TB interval K, the number of transmissions N of the TB, and an initial transmission subframe index K or an initial transmission subframe reference value K₀The joint coding of (a) indicates the value, i.e.,

56. The method of claim 55, wherein different values of the combination [ K, N ] of the TB interval and the number of transmissions of the TB correspond to different numbers of the resource allocation index i.

57. The method according to claim 53, wherein the resource allocation table defines a TB interval K corresponding to the resource allocation index i, the transmission times N of the TB and an initial transmission subframe index K; and the retransmission interval t is determined according to the TB interval K and the transmission times N of the TB, wherein t is an integer value obtained by dividing K by N and rounding down.

58. The method of claim 53, wherein the resource allocation table defines a TB interval K corresponding to the resource allocation index i, the transmission times N of the TB, and an initial transmission subframe reference value K₀(ii) a The retransmission interval t is determined according to the number K of D2D sub-frames contained in the TB interval_D2DAnd the number of transmissions N of said TB, where t equals K_D2DDivide by N a rounded down integer value; the index number k of the initial transmission subframe is according to the retransmission interval t and the reference value k of the initial transmission subframe₀Is determined, where k equals k₀And carrying out modular operation on t to obtain a numerical value.

59. A data transmission apparatus, comprising:

the determining module is used for determining a subframe where the data channel resource is located according to an initial transmission subframe index number k, or the initial transmission subframe index number k and a retransmission interval t, wherein k and t are non-negative integers;

and the sending module is used for sending the data transmission block TB on the subframe where the data channel resource is located.

60. The apparatus according to claim 59,

the determining module is used for determining a subframe where the data channel resource is located according to the initial transmission subframe index number k; or determining N subframes where data channel resources are located through the initial transmission subframe index number k and the retransmission interval t, wherein N is an integer greater than 0;

the sending module is used for sending the TB on a subframe where the data channel resource is located; or sending the TB for N times on the N subframes where the data channel resources are located, wherein N is the sending times of the TB.

61. The apparatus of claim 59, further comprising:

an indicating module, configured to indicate the initial transmission subframe index k and/or the retransmission interval t in a control indication signaling, where the control indication signaling is a device-to-device D2D scheduling configuration signaling or a D2DSAT-RPT signaling.

62. The apparatus of claim 59, wherein the means for determining determines an initial subframe # K for the first transmission of the TB within a TB interval according to the initial transmission subframe index K, wherein a starting subframe of the TB interval is denoted as subframe #0, the initial subframe # K is a kth subframe after the starting subframe, and K is E [0, K-1], and K is the TB interval.

63. The apparatus of claim 62, wherein the means for determining is further configured to determine N-1 retransmission subframes # m for repeatedly transmitting the TB within the TB interval based on the initial transmission subframe # k, wherein N is the number of transmissions of the TB, and m is k + t N, N e [1, N-1 ].

64. The apparatus of claim 59, wherein the means for determining determines an initial transmission subframe # k for the first transmission of the TB within the TB interval by the initial transmission subframe index k_D2DWherein K is contained within the TB interval_D2DDevice-to-device D2D subframe, K_D2DLess than or equal to K, adding the K_D2DThe D2D subframes are connected in sequence to form a logic subframe sequence, which is respectively marked as a subframe [ #0 [ ]，…，#K_D2D-1]Wherein the initial transmission subframe index k indicates a logical initial transmission subframe # k in the logical subframe sequence, and then a physical initial transmission subframe # k corresponding to the logical initial transmission subframe # k is determined according to the distribution of the D2D subframes in the TB interval_D2D(ii) a The number K of the D2D subframes contained within the TB interval_D2DAnd subframe location is indicated by system pre-defined or higher layer signaling configuration.

65. The apparatus of claim 64, wherein the determining module is further configured to determine the initial transmission subframe # k based on the number of subframes in the initial transmission subframe # k_D2DDetermining, by the retransmission interval t, N-1 retransmission subframes # m in which the TB is repeatedly transmitted within the TB interval_D2DWherein, at said K_D2DThe D2D subframes are connected in sequence to form a logic subframe sequence [ #0, …, # K [ ]_D2D-1]Determining a logical retransmission subframe # m, m ═ k + t × N, N ∈ [1, N-1] according to the logical initial transmission subframe # k and the retransmission interval t]Further, according to the distribution of the D2D subframes in the TB interval, determining a physical retransmission subframe # m corresponding to the logical retransmission subframe # m_D2D。

66. A data receiving device, comprising:

the determining module is used for determining a subframe where the data channel resource is located through an initial transmission subframe index number k or the initial transmission subframe index number k and a retransmission interval t, wherein k and t are non-negative integers;

and the receiving module is used for receiving the data transmission block TB on the subframe where the data channel resource is located.

67. The apparatus according to claim 66,

the determining module is used for determining a subframe where the data channel resource is located through the initial transmission subframe index number k or determining N subframes where the data channel resource is located through the initial transmission subframe index number k and the retransmission interval t, wherein N is an integer greater than 0;

the receiving module is used for receiving a data transmission block TB on a subframe where the data channel resources are located; or receiving the transmission times of the TB for N times on N subframes where the data channel resources are located, wherein N is the transmission times of the TB.

68. The apparatus of claim 66, wherein the determining module is configured to determine a subframe where the data channel resource is located according to the initial transmission subframe index K, or the initial transmission subframe index K and the retransmission interval t within a TB interval corresponding to the TB to be received, wherein the TB interval is a maximum subframe range that can be used for receiving the TB and includes K subframes, K is greater than or equal to N, and K is a positive integer.

69. The apparatus of claim 66, wherein the means for determining determines an initial transmission subframe # K for the first reception of the TB within a TB interval according to the initial transmission subframe index K, wherein a starting subframe of the TB interval is denoted as subframe #0, and wherein the initial transmission subframe # K is a kth subframe after the starting subframe, and wherein K ∈ [0, K-1 ].

70. The apparatus of claim 69, wherein the means for determining is further configured to determine N-1 retransmission subframes # m for receiving the TB retransmission within the TB interval based on the initial transmission subframe # k, wherein m + t N, N e [1, N-1], through the retransmission interval t.

71. The apparatus of claim 66, wherein the means for determining determines an initial transmission subframe # k for receiving the TB for the first time within the TB interval by the initial transmission subframe index k_D2DWherein K is contained within the TB interval_D2DDevice-to-device D2D subframe, K_D2DLess than or equal to K, adding the K_D2DThe D2D subframes are sequentially connected to form a logic subframe sequence, which is respectively marked as subframes [ #0, …, # K [_D2D-1](ii) a The initial transmission subframe index k indicates a logical initial transmission subframe # k in the logical subframe sequence, and further, according to the distribution of the D2D subframes in the TB interval, a physical initial transmission subframe # k corresponding to the logical initial transmission subframe # k is determined_D2D(ii) a The number K of the D2D subframes contained within the TB interval_D2DAnd subframe location is indicated by system pre-defined or higher layer signaling configuration.

72. The apparatus of claim 71, wherein the determining module is further configured to determine the subframe # k based on the initial transmission subframe # k_D2DDetermining, by the retransmission interval t, N-1 retransmission subframes # m in which the TB retransmission is received within the TB interval_D2DWherein, at said K_D2DThe D2D subframes are connected in sequence to form a logic subframe sequence [ #0, …, # K [ ]_D2D-1]Determining a logical retransmission subframe # m, m ═ k + t × N, N ∈ [1, N-1] according to the logical initial transmission subframe # k and the retransmission interval t]Further, according to the distribution of the D2D subframes in the TB interval, determining a physical retransmission subframe # m corresponding to the logical retransmission subframe # m_D2D。

73. The apparatus of claim 66, further comprising:

an obtaining module, configured to obtain the initial transmission subframe index k and/or the retransmission interval t from a received control indication signaling, where the control indication signaling is a device-to-device D2D scheduling configuration signaling or a D2DSAT-RPT signaling.

74. A data transmission system, comprising: a first user equipment, UE, comprising the apparatus of any of claims 59 to 65, and a second UE comprising the apparatus of any of claims 66 to 73.