CN105516886A - Method and device for D2D communication - Google Patents
Method and device for D2D communication Download PDFInfo
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- CN105516886A CN105516886A CN201410499340.3A CN201410499340A CN105516886A CN 105516886 A CN105516886 A CN 105516886A CN 201410499340 A CN201410499340 A CN 201410499340A CN 105516886 A CN105516886 A CN 105516886A
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Abstract
The invention provides a method and device for D2D communication. The method comprises that a second transmission mode set associated to a second sub-frame length is obtained, the second transmission mode set comprises a second transmission mode aimed at TDD, and is determined on the basis of a first transmission mode set associated with a first sub-frame length, and the first sub-frame length is greater than the second sub-frame length. and D2D communication is carried out according to the second transmission mode in the second transmission mode set.
Description
Technical field
The present invention relates to the communications field, particularly for method and apparatus that equipment communicates to equipment (Device-to-Device, D2D).
Background technology
Equipment is the enhancing of the cellular communication system to such as Long Term Evolution (LongTermEvolution) etc. to this communication mechanism of equipment (Device-to-Device, D2D).In D2D communication, can with higher data transfer rate direct communication between the subscriber equipment (UE) closed on each other.D2D communication can realize many benefits, such as alleviates the live load of base station (BS).At present, third generation partner program (3GPP) to communicate the standardization effort of being correlated with about D2D.
In Release12, for D2D communication, pay the utmost attention to the broadcast communication at coverage outer (out-of-coverage).D2D broadcast communication supports that VoIP business is a challenging task.This needs to broadcast VoIP grouping and arrives UE far away as far as possible.In order to improve coverage, arrowband (such as, 2 or 3 Physical Resource Block) can be utilized to carry out broadcasting the transmission of VoIP grouping.For larger channel width (such as, 50 Physical Resource Block under 10MHz bandwidth), need to carry out frequency division multiplexing (FDM) broadcasting transmitting from multiple UE, fully to use available frequency spectrum resource.But these schemes above-mentioned can cause half-duplex to limit and launch in band, thus affect broadcast behavior.
In the prior art, can be the bitmap of N, obtain the transmission mode for D2D communication from length.In this transmission mode, D2D transmission is carried out in " 1 " instruction, and " 0 " instruction does not carry out D2D transmission.For time division duplex (TDD) configuration, N=8 is used for TDD configuration 1,2,4 and 5, N=7 is used for TDD configuration 0, and N=6 is used for TDD configuration 3 and 6.For pattern 1, k={1,2,4, N}; For pattern 2, k={1,2,4}.
But, prior art do not solve at N=6 or 7 and k=4 how to determine the problem of transmission mode of D2D communication.
Summary of the invention
For above problem, the invention provides a kind of solution for D2D communication.
According to a first aspect of the invention, a kind of method for D2D communication is provided.The method comprises: obtain the second transmission mode set be associated with the second subframe lengths, wherein the second transmission mode set comprises the second transmission mode for TDD, second transmission mode set is determined based on the first transmission mode set be associated with the first subframe lengths, and the first subframe lengths is greater than the second subframe lengths; And carry out D2D communication according to the second transmission mode in the second transmission mode set.
According to a second aspect of the invention, a kind of method for D2D communication is provided.The method comprises: obtain the index information about transmission mode set, wherein transmission mode set is at least that the walsh matrix of the first subframe lengths and the benefit matrix of walsh matrix are set up based on exponent number, and the length of transmission mode in transmission mode set is the first subframe lengths; And according to index information, from transmission mode set, select the transmission mode for carrying out D2D communication.
According to a third aspect of the invention we, a kind of device for D2D communication is provided.This device comprises: pattern acquiring unit, be configured to obtain the second transmission mode set be associated with the second subframe lengths, wherein the second transmission mode set comprises the second transmission mode for TDD, second transmission mode set is determined based on the first transmission mode set be associated with the first subframe lengths, and the first subframe lengths is greater than the second subframe lengths; And communication unit, be configured to carry out D2D communication according to the second transmission mode in the second transmission mode set.
According to a forth aspect of the invention, a kind of device for D2D communication is provided.This device comprises: index acquiring unit, be configured to obtain the index information about transmission mode set, wherein transmission mode set is at least that the walsh matrix of the first subframe lengths and the benefit matrix of walsh matrix are set up based on exponent number, and the length of transmission mode in transmission mode set is the first subframe lengths; And selected cell, be configured to according to index information, from transmission mode set, select the transmission mode for carrying out D2D communication.
By the description of the following preferred implementation to the explanation principle of the invention, and by reference to the accompanying drawings, other features of the present invention and advantage will be apparent.
Accompanying drawing explanation
By below in conjunction with the description of the drawings, and understand more comprehensively along with to of the present invention, other objects of the present invention and effect will become clearly and easy to understand, wherein:
Fig. 1 is the flow chart of the method 100 for D2D communication according to an embodiment of the invention;
Fig. 2 is 8 rank Walsh (Walsh) matrixes according to an embodiment of the invention and the signal Figure 200 mending matrix thereof;
Fig. 3 is the schematic diagram 300 obtaining the transmission mode set of N=7 from 8 rank walsh matrixs according to an embodiment of the invention;
Fig. 4 A and Fig. 4 B is the schematic diagram 410 and 420 obtaining the transmission mode set of N=6 from 8 rank walsh matrixs according to an embodiment of the invention respectively;
Fig. 5 is the flow chart of the method 500 for D2D communication according to an embodiment of the invention;
Fig. 6 A is the schematic diagram 610 obtaining transmission mode from 8 rank walsh matrixs according to an embodiment of the invention;
Fig. 6 B is the schematic diagram 620 that the benefit matrix from 8 rank walsh matrixs according to an embodiment of the invention obtains transmission mode;
Fig. 7 is the schematic diagram 700 of the index-mapping of transmission mode according to an embodiment of the invention;
Fig. 8 is the schematic diagram 800 of the index-mapping of transmission mode according to another embodiment of the invention;
Fig. 9 is the block diagram of the device 900 for D2D communication according to an embodiment of the invention; And
Figure 10 is the block diagram of the device 1000 for D2D communication according to an embodiment of the invention.
Embodiment
The principle of theme described here is described referring now to some example embodiment.Should be appreciated that and describe these embodiments just in order to enable those skilled in the art understand better and then realize theme described here, and not limit the scope of theme described here by any way.
Term " subscriber equipment " (UE) refers to any equipment that can communicate with BS as used herein.Exemplarily, UE can comprise terminal, mobile terminal (MT), subscriber stations (SS), portable subscriber platform (PSS), travelling carriage (MS) or access terminal (AT).
Term " base station " (BS) can represent Node B (NodeB or NB), enode b (eNodeB or eNB), remote radio unit (RRU), radio-frequency maser (RH), far end radio frequency head (RRH), repeater, low power nodes, such as femto base station, femto base station etc. as used herein.
Term " comprises " and is out of shape as used herein is that opening comprises, and namely " includes but not limited to ".Term "based" is " at least in part based on ".Term " embodiment " expression " at least one embodiment "; Term " another embodiment " expression " at least one other embodiment ".The related definition of other terms provides in will be described below.
It should be noted, although embodiments of the invention mainly employ Long Term Evolution (LTE) system and are exemplarily described, but this is only exemplary, technical scheme of the present invention can be applied to other suitable existing or following systems completely.
Fig. 1 shows the flow chart of the method 100 for D2D communication according to an embodiment of the invention.Embodiment shown in Fig. 1 can by subscriber equipment or for those skilled in the art can other any suitable devices perform.
In step S101, obtain the second transmission mode set determined based on the first transmission mode set be associated with the first subframe lengths, be associated with the second subframe lengths.
As mentioned above, in the prior art, can be obtain the transmission mode for D2D communication the bitmap of N from length, wherein N represents and the subframe lengths that such D2D transmission mode is associated.In this way, can obtain the first transmission mode set be associated with the first subframe lengths, this first transmission mode set can comprise one or more first transmission mode.Each first transmission mode can comprise N number of element, and each element corresponds to a subframe, and the value of each element can indicate and to carry out transmission or reception at corresponding subframe place.Thus, UE can adopt the first transmission mode to carry out D2D communication.
According to embodiments of the invention, the first transmission mode set can be determined according to walsh matrix and benefit matrix thereof.Fig. 2 shows 8 rank walsh matrixs according to an embodiment of the invention and mends the schematic diagram of matrix.Specifically, the left side of Fig. 2 is 8 rank walsh matrix W
8,1, the right side of Fig. 2 is the benefit matrix W of this 8 rank walsh matrix
8,2, W
8,2can according to W
8,1obtain.Such as, W
8,2can according to passing through Walsh matrix W
8,1be multiplied by-1 to obtain.
According to one embodiment of present invention, multiple first transmission modes that the walsh matrix that it is the first subframe lengths N that the first transmission mode set can comprise according to exponent number is determined.Such as, for the situation of N=8, k=4, wherein k represents the number of the subframe of carrying out D2D transmission, and the every a line except the first row in walsh matrix can correspond to first transmission mode.
Alternatively or additionally, multiple first transmission modes that the benefit matrix that it is the walsh matrix of N that the first transmission mode set can also comprise according to exponent number is determined.Similarly, the every a line in this benefit matrix except the first row can correspond to first transmission mode.
Each element in each first transmission mode can correspond to a subframe, and the instruction of the value of each element is carried out transmission or received at corresponding subframe place.As shown in Figure 2, W
8,1and W
8,2in "+1 " instruction carry out D2D transmission at corresponding subframe place, "-1 " instruction carry out D2D reception at corresponding subframe place.
By by W
8,1and W
8,2in "+1 " be revised as " 1 ", and "-1 " to be revised as " 0 ", the first transmission mode set can be become bitmap format.The first transmission mode obtained by the way add up to 14, wherein according to W
8,17 the first transmission modes can be obtained, and according to W
8,2also 7 the first transmission modes can be obtained.
According to embodiments of the invention, the second transmission mode set can comprise for one or more second transmission mode of TDD.In addition, in an embodiment according to the present invention, the first subframe lengths is greater than the second subframe lengths.Such as, the first subframe lengths is 8, and the second subframe lengths is 6 or 7.
Second transmission mode set can obtain in several ways.According to embodiments of the invention, the submatrix of the described walsh matrix obtained by the predetermined row in deletion walsh matrix and predetermined column can be defined as the second transmission mode set.
In the above-described embodiments, the first subframe lengths can be the 8, second subframe lengths can be 7, and in each first transmission mode and each second transmission mode in be 4 for the number of subframes transmitted, i.e. k=4.See Fig. 3, it illustrates the schematic diagram obtaining the transmission mode set of N=7 from 8 rank walsh matrixs according to an embodiment of the invention.By deleting walsh matrix W
8,1in the first row and first row, following submatrix (P see in Fig. 3) can be obtained and be used as the second transmission mode set:
In above-mentioned second transmission mode set, each line display second transmission mode, the value of each element in every a line is that "+1 " instruction is transmitted at corresponding subframe place, and this value is that "-1 " instruction receives at corresponding subframe place.
In the above-described embodiments, N=7, k=4, and the sum of available transmission pattern is 7.In addition, adopt the broadcast UE of different transmission modes for any two, broadcast UE can at least twice reception from the transmission of another broadcast UE, vice versa, which solves the problem of half-duplex restriction.
As an alternative, according to embodiments of the invention, the second transmission mode set can obtain in the following way.First, by deleting the predetermined row in walsh matrix, the first submatrix of this walsh matrix can be obtained; Then, by the predetermined column in deletion first submatrix, the second submatrix of walsh matrix can be obtained; Then, a part for the second submatrix can be defined as the second transmission mode set.
According to embodiments of the invention, alternatively, obtain each second transmission mode in the second transmission mode set can be sorted, this sequence can be carried out according to the size of the numerical value corresponding with each second transmission mode.In one embodiment, by "+1 " in each second transmission mode in the second transmission mode set is thought " 1 " and "-1 " thought " 0 ", each second transmission mode can be thought a bit sequence; Then the value (such as binary value or decimal value) corresponding with each bit sequence can be determined; Then can sort to each second transmission mode corresponding with each bit sequence according to the size of these values (such as with according to order from small to large).
As another alternative, according to embodiments of the invention, the second transmission mode set can also obtain in the following way.By deleting the predetermined row in walsh matrix, obtain the first submatrix of walsh matrix; To the line ordering of respectively advancing in the first submatrix; By deleting the predetermined column in the first submatrix of sequence, obtain the second submatrix of walsh matrix; And a part for the second submatrix is defined as the second transmission mode set.
In above-mentioned embodiment optionally, the first subframe lengths can be the 8, second subframe lengths can be 6, and the number for the subframe transmitted of the first transmission mode and the second transmission mode is 4, i.e. k=4 respectively.See Fig. 4 A and Fig. 4 B, they are schematic diagrames obtaining the transmission mode set of N=6 from 8 rank walsh matrixs according to an embodiment of the invention.As shown in Figure 4 A, can by deleting walsh matrix W
8,1in the first row, obtain the first submatrix, then can to the line ordering of respectively advancing in this first submatrix.Pass through the result of sequence as the H in Fig. 4 A
1shown in.According to embodiments of the invention, to respectively advancing, line ordering can realize in several ways.For example, by " 1 " being thought in "+1 " in every a line and "-1 " being thought " 0 ", every a line can be thought a bit sequence; Then the value (such as binary value or decimal value) corresponding with each bit sequence can be determined; Then can according to the size of these values (such as with according to order from small to large) to respectively advance line ordering corresponding with each bit sequence.
As shown in Figure 4 B, can by deleting the first submatrix H through sequence
1in first row and secondary series, obtain the second submatrix of this walsh matrix; And a part (the matrix Q see in Fig. 4 B) for the second submatrix is defined as the second following transmission mode set:
In above-mentioned second transmission mode set, each line display second transmission mode, the value of each element in every a line is that "+1 " instruction is transmitted at corresponding subframe place, and this value is that "-1 " instruction receives at corresponding subframe place.
In the above-described embodiments, N=6, k=4, and the sum of available transmission pattern is 3.In addition, adopt the broadcast UE of different transmission modes for any two, broadcast UE can at least twice reception from the transmission of another broadcast UE, vice versa, which solves the problem of half-duplex restriction.
In step S102, carry out D2D communication according to the second transmission mode in the second transmission mode set.
According to embodiments of the invention, an element in each second transmission mode in the second transmission mode set corresponds to a subframe, and D2D transmission is carried out in the instruction of the value of element at corresponding subframe place or D2D receives operation.Therefore, after step S101 obtains the second transmission mode set, the value of each element of the second transmission mode can be determined, thus according to the value of determined each element, D2D transmission or reception can be carried out at corresponding subframe place.
In the prior art, set the index range of transmission mode, this scope comprises and is no more than 128 values.How each value in these 128 values being mapped to each transmission mode is the problem needing at present to solve.
For the problems referred to above, embodiments of the invention propose the index-mapping scheme for transmission mode.The transmission mode obtained from walsh matrix forms a subset, provides the information about optimal transmission set of modes.Remaining transmission mode is sorted according to the value (such as binary value or decimal value) of the bit sequence corresponding with it.Index-mapping scheme can simplify transmission mode configuration signal according to an embodiment of the invention, reduce the signaling consumption being used for transmission mode configuration, optimization set about the transmission mode derived from walsh matrix is provided, and unified index-mapping can be provided for TDD configuration and Frequency Division Duplexing (FDD) (FDD) configuration.Index-mapping scheme is according to an embodiment of the invention described in detail below in conjunction with Fig. 5 to Fig. 8.
Fig. 5 is the flow chart of the method 500 for D2D communication according to an embodiment of the invention.Embodiment shown in Fig. 5 can by subscriber equipment or for those skilled in the art can other any suitable devices perform.
Method 500 in step S501, obtains the index information about transmission mode set after starting.According to embodiments of the invention, transmission mode set is at least that the walsh matrix of the first subframe lengths and the benefit matrix of described walsh matrix are set up based on exponent number, and the length of transmission mode in described transmission mode set is described first subframe lengths.Then, in step S502, according to index information, from transmission mode set, select the transmission mode for carrying out D2D communication.
According to embodiments of the invention, transmission mode set can be divided into two parts.It is multiple transmission modes that the walsh matrix of the first subframe lengths and the benefit matrix of described walsh matrix are determined that Part I can comprise according to exponent number.Part II can comprise other transmission mode that length is the first subframe lengths, that determine according to the number of the subframe for transmitting.Each element of each transmission mode can correspond to a subframe, and the value of each element can indicate and to carry out transmission at corresponding subframe place or receive.
Fig. 6 A and Fig. 6 B shows from walsh matrix W
8,1and benefit matrix W
8,2obtain the schematic diagram of the embodiment of transmission mode.In this embodiment, the first subframe lengths (being expressed as N) is 8, and for the number of subframe that transmits, (be expressed as k) is 4.That is, N=8, k=4.As shown in Figure 6A, the W by deleting
8,1the first row, can W be obtained
8,1submatrix.In an exemplary embodiment in accordance with the present invention, can sort for this submatrix.This sequence can be carried out according to the size of the often capable corresponding numerical value with submatrix.In one embodiment, by "+1 " in every row is thought " 1 " and "-1 " thought " 0 ", every row can be thought a bit sequence; Then the value (such as binary value or decimal value) corresponding with each bit sequence can be determined; Then can according to the size of these values (such as with according to order from small to large) to respectively advance line ordering corresponding with each bit sequence.Thus, the submatrix H through sequence can be obtained
1.Similarly, as shown in Figure 6B, the W by deleting
8,2the first row, can W be obtained
8,2submatrix, then can obtain through sequence submatrix H
2.H
1and H
2all row the transmission mode set of optimization can be provided for the situation of N=8.In addition, H
1the transmission mode set that optimization can be provided for the situation of N=7 containing all row of the 1st element, and H
1the transmission mode set that optimization can be provided for the situation of N=6 containing the first three rows of the first two element.
The Part I of transmission mode set can comprise the first subset of transmission mode set to three subsetss.Wherein, the first subset can comprise according to exponent number is the transmission mode that the 2nd in the walsh matrix of the first subframe lengths walks to the 4th row and determine.It is the transmission mode that the 5th in the walsh matrix of the first subframe lengths walks to eighth row and determine that second subset can comprise according to exponent number.It is the transmission mode that all row in the benefit matrix of the walsh matrix of the first subframe lengths except the first row are determined that three subsetss can comprise according to exponent number.
According to embodiments of the invention, the first subframe lengths (being expressed as N) can be 8, and for the number of subframe that transmits, (be expressed as k) can be 4.That is, N=8, k=4.In this embodiment, the first subset can comprise and walks to the 4th row according to the 2nd in 8 rank walsh matrixs and the transmission mode determined.Second subset can comprise and walks to eighth row according to the 5th in 8 rank walsh matrixs and the transmission mode determined.The transmission mode that three subsetss can comprise all row in the benefit matrix according to 8 rank walsh matrixs except the first row and determine.
The Part II of transmission mode set can comprise the 4th subset to the 6th subset.Wherein, the 4th subset can comprise the transmission mode that the first two element all indicates reception.According to embodiments of the invention, " 0 " and " 1 " can be adopted to indicate respectively and receive or transmission, now the 4th subset can comprise the transmission mode that the first two element is all " 0 ".5th subset can comprise the first two element and indicate the transmission mode receiving and transmit (such as the first two element is " 0 " and " 1 " respectively) respectively.6th subset can comprise the transmission mode that the first two element all indicates transmission (such as the first two element is all " 1 ").Should be noted that, according to embodiments of the invention, also "-1 " and "+1 " can be adopted to indicate respectively and to receive or transmission, in the case, 4th subset can comprise the transmission mode that the first two element is all "-1 ", 5th subset can comprise the transmission mode that the first two element is "-1 " and "+1 " respectively, and the 6th subset can comprise the transmission mode that the first two element is all "+1 ".According to embodiments of the invention, the 4th subset is the first subframe lengths N, such as N=8 to the length of all transmission modes in the 6th subset, and these transmission modes have the element number k that D2D transmission is carried out in identical instruction, such as k=4.
According to embodiments of the invention, transmission mode sequence can be carried out respectively to the transmission mode in described 6th subset to described first subset, and according to from described first subset to the order of described 6th subset, set up described index information according to described transmission mode sequence for described transmission mode set.Fig. 7 shows the schematic diagram of the index-mapping of the transmission mode according to above-described embodiment.In the figure 7, first element of every a line is index, and the 2 to 9 element of every a line is a bit sequence, and it is the transmission mode corresponding with this index.First subset adopts " 0 " and " 1 " to indicate respectively to the transmission mode in the 6th subset and receives or transmission.As shown in Figure 7, arrange according to from the first subset to the order of the 6th subset from top to bottom, and the transmission mode in each subset is sorted.This sequencer procedure can such as by determining the numerical value (such as binary value or decimal value) corresponding with each transmission mode and carry out sequence to these numerical value to have come.
According to embodiments of the invention, can by carrying out the whole table shown in Fig. 7 to store the index recording transmission mode in each subset and correspondence thereof.As alternative, the index (being designated as " I ") of the transmission mode in the 4th subset, the 5th subset sums the 6th subset can be calculated by following formula:
Wherein, transmission mode p is by bit sequence B
prepresent; n
prepresent H
1and H
2in the number of the little transmission mode of the numerical value of numeric ratio transmission mode p;
comprise for B
pthe index through sequence of the position of middle element 1;
it is the binomial coefficient of expansion.
According to embodiments of the invention, subset sequence can be carried out to described first subset to described 6th subset, and respectively transmission mode sequence is carried out to the transmission mode in described first subset to described 6th subset, and set up described index information according to described subset sequence and the sequence of described transmission mode for described transmission mode set.Fig. 8 shows the schematic diagram of the index-mapping of the transmission mode according to above-described embodiment.In fig. 8, the first subset adopts " 0 " and " 1 " to indicate reception or transmission respectively to the transmission mode in the 6th subset.As shown in Figure 8, be not according to the order of the first subset shown in Fig. 7 to the 6th subset from top to bottom, but carry out in the following order.
Specifically, for the situation of N=8, the first subset, the second subset sums three subsetss can form the optimization set of the transmission mode obtained from walsh matrix.
For the situation of N=7, the first subset sums second subset can form the optimization set of the transmission mode obtained from walsh matrix, and the first subset, the second subset, the 4th subset sums the 5th subset form all transmission modes.Now, can think that first bit (that is, " 0 ") of bit sequence does not use.Such as, be the bit sequence of " 0 " for the index in the first subset, the transmission mode for the situation of N=7 is " 0001111 ", instead of the transmission mode " 00001111 " of situation for N=8.
For the situation of N=6, the first subset can form the optimization set of the transmission mode obtained from walsh matrix, and the first subset sums the 4th subset forms all transmission modes.Now, can think that the first two bit (that is, " 00 ") of bit sequence does not use.Such as, be the bit sequence of " 0 " for the index in the first subset, the transmission mode for the situation of N=6 is " 001111 ".
In addition, in the embodiment in fig. 8, can the transmission mode in each subset be sorted.This sequencer procedure can such as by determining the numerical value (such as binary value or decimal value) corresponding with each transmission mode and carry out sequence to these numerical value to have come.
According to embodiments of the invention, the index (being designated as " I ") of the transmission mode in the 4th subset, the 5th subset sums the 6th subset can be calculated by following formula:
Wherein for the 4th subset n
s=3, for the 5th subset n
s=7, for the 6th subset n
s=14.
Embodiment according to Fig. 8, the index for transmission mode when N=7 and the index for transmission mode when N=6 are all serial numbers.
Fig. 9 is the block diagram of the device 900 for D2D communication according to an embodiment of the invention.As shown in Figure 9, device 900 can comprise: pattern acquiring unit 910, be configured to obtain the second transmission mode set be associated with the second subframe lengths, wherein the second transmission mode set comprises the second transmission mode for TDD, second transmission mode set is determined based on the first transmission mode set be associated with the first subframe lengths, and the first subframe lengths is greater than the second subframe lengths; And communication unit 920, be configured to carry out D2D communication according to the second transmission mode in the second transmission mode set.
According to embodiments of the invention, multiple first transmission modes that the walsh matrix that it is the first subframe lengths that first transmission mode set can comprise according to exponent number is determined, each element of each first transmission mode corresponds to a subframe, and the instruction of the value of each element is carried out transmission or received at corresponding subframe place.
According to embodiments of the invention, pattern acquiring unit 910 can be configured to obtain the second transmission mode set by following acquisition further: the submatrix of the walsh matrix obtained by the predetermined row in deletion walsh matrix and predetermined column is defined as the second transmission mode set.
According to embodiments of the invention, the first subframe lengths is 8, and the second subframe lengths is 7, and the number for the subframe transmitted of the first transmission mode and the second transmission mode is 4 respectively; Wherein predetermined row is the first row, and predetermined column is first row; Wherein the second transmission mode set is:
Each line display second transmission mode wherein in the second transmission mode set, the value of each element in every a line is that "+1 " instruction is transmitted at corresponding subframe place, for "-1 " instruction receives at corresponding subframe place.
According to embodiments of the invention, pattern acquiring unit 910 can be configured to obtain the second transmission mode set by following acquisition further: by deleting the predetermined row in walsh matrix, obtain the first submatrix of walsh matrix; By deleting the predetermined column in the first submatrix, obtain the second submatrix of walsh matrix; And a part for the second submatrix is defined as the second transmission mode set.
According to embodiments of the invention, pattern acquiring unit 910 can be configured to obtain the second transmission mode set by following acquisition further: by deleting the predetermined row in walsh matrix, obtain the first submatrix of walsh matrix; To the line ordering of respectively advancing in the first submatrix; By deleting the predetermined column in the first submatrix of sequence, obtain the second submatrix of walsh matrix; And a part for the second submatrix is defined as the second transmission mode set.
According to embodiments of the invention, the first subframe lengths is 8, and the second subframe lengths is 6, and the number for the subframe transmitted of the first transmission mode and the second transmission mode is 4 respectively; Wherein predetermined row is the first row, and predetermined column is first row and secondary series; Wherein the second transmission mode set is:
Each line display second transmission mode wherein in the second transmission mode set, the value of each element in every a line is that "+1 " instruction is transmitted at corresponding subframe place, for "-1 " instruction receives at corresponding subframe place.
According to embodiments of the invention, each second transmission mode in the second transmission mode set is sorted, and sequence carries out according to the size of the numerical value corresponding with each second transmission mode.
According to embodiments of the invention, communication unit 920 can comprise: determining unit, is configured to the value of each element determining the second transmission mode; And communication unit is further configured to the value according to determined each element, carry out D2D transmission or reception at corresponding subframe place.
Figure 10 is the block diagram of the device 1000 for D2D communication according to an embodiment of the invention.As shown in Figure 10, device 1000 can comprise: index acquiring unit 1010, be configured to obtain the index information about transmission mode set, wherein transmission mode set is at least that the walsh matrix of the first subframe lengths and the benefit matrix of walsh matrix are set up based on exponent number, and the length of transmission mode in transmission mode set is the first subframe lengths; And selected cell 1020, be configured to according to index information, from transmission mode set, select the transmission mode for carrying out D2D communication.
According to embodiments of the invention, transmission mode set can comprise: Part I, comprises the multiple transmission modes determined according to walsh matrix and benefit matrix; And Part II, comprise the transmission mode except Part I determined according to the number of subframe for transmitting, wherein each element of each transmission mode corresponds to a subframe, and the instruction of the value of each element is carried out transmission or received at corresponding subframe place.
According to embodiments of the invention, the Part I of transmission mode set can comprise: the first subset, comprise the transmission mode determined according to passing through the 2nd in the walsh matrix of sequence to walk to the 4th row, second subset, comprise the transmission mode determined according to passing through the 5th in the walsh matrix of sequence to walk to eighth row, three subsetss, comprise the transmission mode determined according to all row in the benefit matrix of sequence except the first row; And the Part II of wherein transmission mode set can comprise: the 4th subset, comprise the transmission mode that the first two element all indicates reception, 5th subset, comprise the first two element and indicate the transmission mode receiving and transmit respectively, 6th subset, comprises the transmission mode that the first two element all indicates transmission.
According to embodiments of the invention, the first subframe lengths is 8, and the number for the subframe transmitted is 4.
According to embodiments of the invention, respectively transmission mode sequence is carried out to the transmission mode in the 6th subset to the first subset, and according to from the first subset to the order of the 6th subset, set up index information according to transmission mode sequence for transmission mode set.
According to embodiments of the invention, to the 6th subset, subset sequence is carried out to the first subset, and respectively transmission mode sequence is carried out to the transmission mode in the 6th subset to the first subset, and sort as index information is set up in transmission mode set according to subset sequence and transmission mode.
Should be appreciated that the structured flowchart described in Fig. 9 and Figure 10 illustrates just to the object of example, is not limitation of the present invention.In some cases, some device/unit wherein can be added or reduce as required.
Unit included in device 900 and 1000 can profit realize in various manners, comprises software, hardware, firmware or its combination in any.In one embodiment, one or more unit can use software and/or firmware to realize, such as, store machine-executable instruction on a storage medium.Except machine-executable instruction or as an alternative, the some or all of unit in device 900 and/or 1000 can be realized by one or more hardware logic assembly at least in part.Exemplarily unrestricted, the hardware logic assembly of operable exemplary type comprises field programmable gate array (FPGA), application-specific integrated circuit (ASIC) (ASIC), application specific standard product (ASSP), SOC (system on a chip) (SOC), CPLD (CPLD), etc.
Generally speaking, the various example embodiment of theme described here in hardware or special circuit, software, logic, or can be implemented in its any combination.Some aspect can be implemented within hardware, and other aspects can be implemented in the firmware that can be performed by controller, microprocessor or other computing equipments or software.When each side of the embodiment of theme described here is illustrated or is described as block diagram, flow chart or uses some other diagrammatic representation, square frame described herein, device, system, technology or method will be understood as nonrestrictive example at hardware, software, firmware, special circuit or logic, common hardware or controller or other computing equipments, or can implement in its some combination.
Exemplarily, the embodiment of theme described here can be described in the context of machine-executable instruction, and machine-executable instruction is such as included in the program module performed in the device on the true of target or virtual processor.Generally speaking, program module comprises routine, program, storehouse, object, class, assembly, data structure etc., and it performs specific task or realizes specific abstract data structure.In embodiments, the function of program module can merge or split between described program module.Machine-executable instruction for program module can perform in this locality or distributed apparatus.In distributed apparatus, program module can be arranged in local and remote both storage mediums.
Computer program code for realizing the method for theme described here can be write with one or more programming languages.These computer program codes can be supplied to the processor of all-purpose computer, special-purpose computer or other programmable data processing unit, making program code when being performed by computer or other programmable data processing unit, causing the function/operation specified in flow chart and/or block diagram to be implemented.Program code can completely on computers, part on computers, as independently software kit, part on computers and part perform on remote computer or server on the remote computer or completely.
In context of the present disclosure, machine readable media can be any tangible medium of the program comprising or store for or have about instruction execution system, device or equipment.Machine readable media can be machine-readable signal medium or machinable medium.Machine readable media can include but not limited to electronics, magnetic, optics, electromagnetism, infrared or semiconductor system, device or equipment, or the combination of its any appropriate.The more detailed example of machinable medium comprises with the electrical connection of one or more wire, portable computer diskette, hard disk, random access memories (RAM), read-only memory (ROM), Erasable Programmable Read Only Memory EPROM (EPROM or flash memory), light storage device, magnetic storage apparatus, or the combination of its any appropriate.
In addition, although operation is described with particular order, this also should not be construed and require this generic operation with the particular order illustrated or complete with sequential order, or performs all illustrated operations to obtain expected result.In some cases, multitask or parallel processing can be useful.Similarly, although above-mentioned discussion contains some specific implementation detail, this also should not be construed as the scope of any invention of restriction or claim, and should be interpreted as can for the description of the specific embodiment of specific invention.Some feature described in the context of the embodiment of separating in this specification also can combined implementation in single embodiment.Otherwise the various feature described in the context of single embodiment also can be implemented discretely in multiple embodiment or the sub-portfolio in any appropriate.
Although the theme with the language description specific to architectural feature and/or method action, should be appreciated that theme defined in the appended claims is not limited to above-described special characteristic or action.On the contrary, above-described special characteristic and action are disclosed as the exemplary forms realizing claim.
Claims (30)
1., for the method that equipment communicates to equipment D2D, comprising:
Obtain the second transmission mode set be associated with the second subframe lengths, wherein said second transmission mode set comprises the second transmission mode for TDD, described second transmission mode set is determined based on the first transmission mode set be associated with the first subframe lengths, and described first subframe lengths is greater than described second subframe lengths; And
D2D communication is carried out according to described second transmission mode in described second transmission mode set.
2. method according to claim 1, multiple first transmission modes that the walsh matrix that it is the first subframe lengths that wherein said first transmission mode set comprises according to exponent number is determined, each element of each first transmission mode corresponds to a subframe, and the instruction of the value of described each element is carried out transmission or received at corresponding subframe place.
3. method according to claim 2, wherein obtains the second transmission mode set be associated with the second subframe lengths and comprises: obtain the described second transmission mode set by following acquisition:
The submatrix of the described walsh matrix obtained by the predetermined row in the described walsh matrix of deletion and predetermined column is defined as described second transmission mode set.
4. method according to claim 3, wherein said first subframe lengths is 8, and described second subframe lengths is 7, and the number for the subframe transmitted of described first transmission mode and described second transmission mode is 4 respectively;
Wherein said predetermined row is the first row, and described predetermined column is first row;
Wherein said second transmission mode set is:
Each line display second transmission mode in wherein said second transmission mode set, the value of each element in described every a line is that "+1 " instruction is transmitted at corresponding subframe place, for "-1 " instruction receives at corresponding subframe place.
5. method according to claim 2, wherein obtains the second transmission mode set be associated with the second subframe lengths and comprises: obtain the described second transmission mode set by following acquisition:
By deleting the predetermined row in described walsh matrix, obtain the first submatrix of described walsh matrix;
By deleting the predetermined column in described first submatrix, obtain the second submatrix of described walsh matrix; And
A part for described second submatrix is defined as described second transmission mode set.
6. method according to claim 2, wherein obtains the second transmission mode set be associated with the second subframe lengths and comprises: obtain the described second transmission mode set by following acquisition:
By deleting the predetermined row in described walsh matrix, obtain the first submatrix of described walsh matrix;
To the line ordering of respectively advancing in described first submatrix;
By deleting the predetermined column in described first submatrix of sequence, obtain the second submatrix of described walsh matrix; And
A part for described second submatrix is defined as described second transmission mode set.
7. the method according to claim 5 or 6, wherein said first subframe lengths is 8, and described second subframe lengths is 6, and the number for the subframe transmitted of described first transmission mode and described second transmission mode is 4 respectively;
Wherein said predetermined row is the first row, and described predetermined column is first row and secondary series;
Wherein said second transmission mode set is:
Each line display second transmission mode in wherein said second transmission mode set, the value of each element in described every a line is that "+1 " instruction is transmitted at corresponding subframe place, for "-1 " instruction receives at corresponding subframe place.
8. method according to claim 1, each second transmission mode in wherein said second transmission mode set is sorted, and described sequence carries out according to the size of the numerical value corresponding with each second transmission mode.
9. method according to claim 1, wherein carry out D2D communication according to described second transmission mode in described second transmission mode set and comprise:
Determine the value of each element of described second transmission mode; And
According to the value of determined each element, carry out D2D transmission or reception at corresponding subframe place.
10., for the method that equipment communicates to equipment D2D, comprising:
Obtain the index information about transmission mode set, wherein said transmission mode set is at least that the walsh matrix of the first subframe lengths and the benefit matrix of described walsh matrix are set up based on exponent number, and the length of transmission mode in described transmission mode set is described first subframe lengths; And
According to described index information, from described transmission mode set, select the transmission mode for carrying out D2D communication.
11. methods according to claim 10, wherein said transmission mode set comprises:
Part I, comprises the multiple transmission modes determined according to described walsh matrix and described benefit matrix; And
Part II, comprises the transmission mode except described Part I determined according to the number of subframe for transmitting,
Wherein each element of each transmission mode corresponds to a subframe, and the instruction of the value of described each element is carried out transmission or received at corresponding subframe place.
12. methods according to claim 11, the Part I of wherein said transmission mode set comprises:
First subset, comprises the transmission mode determined according to passing through the 2nd in the described walsh matrix of sequence to walk to the 4th row,
Second subset, comprises the transmission mode determined according to passing through the 5th in the described walsh matrix of sequence to walk to eighth row,
Three subsetss, comprise the transmission mode determined according to all row in the described benefit matrix of sequence except the first row; And
The Part II of wherein said transmission mode set comprises:
4th subset, comprises the transmission mode that the first two element all indicates reception,
5th subset, comprises the first two element and indicates the transmission mode receiving and transmit respectively,
6th subset, comprises the transmission mode that the first two element all indicates transmission.
13. methods according to claim 11 or 12, wherein said first subframe lengths is 8, and the number for the subframe transmitted is 4.
14. methods according to claim 12, wherein respectively transmission mode sequence is carried out to the transmission mode in described 6th subset to described first subset, and according to from described first subset to the order of described 6th subset, set up described index information according to described transmission mode sequence for described transmission mode set.
15. methods according to claim 12, wherein subset sequence is carried out to described first subset to described 6th subset, and respectively transmission mode sequence is carried out to the transmission mode in described first subset to described 6th subset, and set up described index information according to described subset sequence and the sequence of described transmission mode for described transmission mode set.
16. 1 kinds of devices communicated to equipment D2D for equipment, comprising:
Pattern acquiring unit, be configured to obtain the second transmission mode set be associated with the second subframe lengths, wherein said second transmission mode set comprises the second transmission mode for TDD, described second transmission mode set is determined based on the first transmission mode set be associated with the first subframe lengths, and described first subframe lengths is greater than described second subframe lengths; And
Communication unit, is configured to carry out D2D communication according to described second transmission mode in described second transmission mode set.
17. devices according to claim 16, multiple first transmission modes that the walsh matrix that it is the first subframe lengths that wherein said first transmission mode set comprises according to exponent number is determined, each element of each first transmission mode corresponds to a subframe, and the instruction of the value of described each element is carried out transmission or received at corresponding subframe place.
18. devices according to claim 17, wherein said pattern acquiring unit is configured to obtain the second transmission mode set by following acquisition further:
The submatrix of the described walsh matrix obtained by the predetermined row in the described walsh matrix of deletion and predetermined column is defined as described second transmission mode set.
19. devices according to claim 18, wherein said first subframe lengths is 8, and described second subframe lengths is 7, and the number for the subframe transmitted of described first transmission mode and described second transmission mode is 4 respectively;
Wherein said predetermined row is the first row, and described predetermined column is first row;
Wherein said second transmission mode set is:
Each line display second transmission mode in wherein said second transmission mode set, the value of each element in described every a line is that "+1 " instruction is transmitted at corresponding subframe place, for "-1 " instruction receives at corresponding subframe place.
20. devices according to claim 17, wherein said pattern acquiring unit is configured to obtain the second transmission mode set by following acquisition further:
By deleting the predetermined row in described walsh matrix, obtain the first submatrix of described walsh matrix;
By deleting the predetermined column in described first submatrix, obtain the second submatrix of described walsh matrix; And
A part for described second submatrix is defined as described second transmission mode set.
21. devices according to claim 17, wherein said pattern acquiring unit is configured to obtain the second transmission mode set by following acquisition further:
By deleting the predetermined row in described walsh matrix, obtain the first submatrix of described walsh matrix;
To the line ordering of respectively advancing in described first submatrix;
By deleting the predetermined column in described first submatrix of sequence, obtain the second submatrix of described walsh matrix; And
A part for described second submatrix is defined as described second transmission mode set.
22. devices according to claim 20 or 21, wherein said first subframe lengths is 8, and described second subframe lengths is 6, and the number for the subframe transmitted of described first transmission mode and described second transmission mode is 4 respectively;
Wherein said predetermined row is the first row, and described predetermined column is first row and secondary series;
Wherein said second transmission mode set is:
Each line display second transmission mode in wherein said second transmission mode set, the value of each element in described every a line is that "+1 " instruction is transmitted at corresponding subframe place, for "-1 " instruction receives at corresponding subframe place.
23. devices according to claim 16, each second transmission mode in wherein said second transmission mode set is sorted, and described sequence carries out according to the size of the numerical value corresponding with each second transmission mode.
24. devices according to claim 16, wherein said communication unit comprises:
Determining unit, is configured to the value of each element determining described second transmission mode; And
Described communication unit is further configured to the value according to determined each element, carries out D2D transmission or reception at corresponding subframe place.
25. 1 kinds of devices communicated to equipment D2D for equipment, comprising:
Index acquiring unit, be configured to obtain the index information about transmission mode set, wherein said transmission mode set is at least that the walsh matrix of the first subframe lengths and the benefit matrix of described walsh matrix are set up based on exponent number, and the length of transmission mode in described transmission mode set is described first subframe lengths; And
Selected cell, is configured to according to described index information, selects the transmission mode for carrying out D2D communication from described transmission mode set.
26. devices according to claim 25, wherein said transmission mode set comprises:
Part I, comprises the multiple transmission modes determined according to described walsh matrix and described benefit matrix; And
Part II, comprises the transmission mode except described Part I determined according to the number of subframe for transmitting,
Wherein each element of each transmission mode corresponds to a subframe, and the instruction of the value of described each element is carried out transmission or received at corresponding subframe place.
27. devices according to claim 26, the Part I of wherein said transmission mode set comprises:
First subset, comprises the transmission mode determined according to passing through the 2nd in the described walsh matrix of sequence to walk to the 4th row,
Second subset, comprises the transmission mode determined according to passing through the 5th in the described walsh matrix of sequence to walk to eighth row,
Three subsetss, comprise the transmission mode determined according to all row in the described benefit matrix of sequence except the first row; And
The Part II of wherein said transmission mode set comprises:
4th subset, comprises the transmission mode that the first two element all indicates reception,
5th subset, comprises the first two element and indicates the transmission mode receiving and transmit respectively,
6th subset, comprises the transmission mode that the first two element all indicates transmission.
28. devices according to claim 26 or 27, wherein said first subframe lengths is 8, and the number for the subframe transmitted is 4.
29. devices according to claim 27, wherein respectively transmission mode sequence is carried out to the transmission mode in described 6th subset to described first subset, and according to from described first subset to the order of described 6th subset, set up described index information according to described transmission mode sequence for described transmission mode set.
30. devices according to claim 27, wherein subset sequence is carried out to described first subset to described 6th subset, and respectively transmission mode sequence is carried out to the transmission mode in described first subset to described 6th subset, and set up described index information according to described subset sequence and the sequence of described transmission mode for described transmission mode set.
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| CN103220782A (en) * | 2012-01-19 | 2013-07-24 | 华为技术有限公司 | Determination method, system and device of transmitting subframe |
| CN103974427A (en) * | 2013-01-31 | 2014-08-06 | 华为技术有限公司 | Resource allocation method and device and communication system |
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| CN103220782A (en) * | 2012-01-19 | 2013-07-24 | 华为技术有限公司 | Determination method, system and device of transmitting subframe |
| CN103974427A (en) * | 2013-01-31 | 2014-08-06 | 华为技术有限公司 | Resource allocation method and device and communication system |
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