CN110492916A

CN110492916A - Pre-coding matrix instruction method and relevant device

Info

Publication number: CN110492916A
Application number: CN201810464345.0A
Authority: CN
Inventors: 杭海存; 金黄平; 毕晓艳; 王峰; 尚鹏; 贾明
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-05-15
Filing date: 2018-05-15
Publication date: 2019-11-22
Anticipated expiration: 2038-05-15
Also published as: WO2019218906A1; CN110492916B

Abstract

The application provides a kind of pre-coding matrix instruction method and relevant device, wherein transmitting terminal determines the PMI of at least one the second subband group in the pre-coding matrix instruction PMI and broadband of the first subband group of at least one in broadband；The PMI of first subband group is the absolute PMI determined based on benchmark code book the or difference PMI determined based on differential codebook；The PMI of second subband group is based on the difference PMI determined in differential codebook；Differential codebook is to map to obtain from benchmark code book；Transmitting terminal sends the PMI of at least one the first subband group and the PMI of at least one the second subband group.It can be seen that, the embodiment of the present application makes each subband group have corresponding absolute PMI or difference PMI, the pre-coding matrix that subband in the same subband group uses is identical, and the pre-coding matrix used between each subband group can be different, so as to improve the anti-interference ability between each subband group, the spectrum efficiency and system performance of system are substantially improved.

Description

Pre-coding matrix instruction method and relevant device

Technical field

This application involves field of communication technology more particularly to a kind of pre-coding matrix instruction method and relevant devices.

Background technique

At present, extensive multiple-input and multiple-output (Massive Multiple Input and Multiple Output, Massive MIMO) system can realize that spectrum efficiency being obviously improved by large-scale antenna, and base station letter obtained The accuracy of road information largely determines the performance of Massive MIMO, therefore, generallys use code book to quantify to believe Road information.When carrying out codebook quantification channel information, needs to approach original channel characteristics as far as possible under admissible expense, make It is more accurate to obtain channel quantitative.

For example, in downlink system, using second level codebook design, that is, using broadband at present in designed codebook quantification The mode of code book and narrowband code book quantifies, and broadband code book is used to select pre-coding matrix for broad-band channel, and narrowband code book is used for The pre-coding matrix in conjunction with selected by broad-band channel is that narrowband selects pre-coding matrix.In up-link, set using level-one code book Meter, i.e., in the scheduling frequency range of terminal device base station from the level-one code book for one pre-coding matrix of the scheduling Frequency Band Selection into Row uplink.

As it can be seen that the channel quantitative in channel quantitative and up-link in downlink system is all made of a precoding square Battle array, causes the interference between each subband larger, to reduce the spectrum efficiency of system.

Summary of the invention

This application provides a kind of pre-coding matrix instruction method and relevant devices, can be improved system spectral efficiency, also It can reduce signaling overheads.

On the one hand, the application provides a kind of pre-coding matrix instruction method, and in this method, transmitting terminal is determined in broadband at least The pre-coding matrix instruction of at least one the second subband group in the pre-coding matrix instruction of one the first subband group and the broadband； The pre-coding matrix instruction of first subband group is the absolute pre-coding matrix instruction determined based on benchmark code book or base In the differential precoding matrix instruction that differential codebook determines；The pre-coding matrix instruction of second subband group is based on differential code The differential precoding matrix of this determination indicates；The differential codebook is to map to obtain from the benchmark code book；Transmitting terminal hair Send at least one described corresponding pre-coding matrix instruction of the first subband group precoding corresponding at least one second subband group Matrix instruction.

Wherein, the differential codebook is to map the obtained code word for referring to that differential codebook includes from the benchmark code book to be It is selected from the code word for meeting preset rules in benchmark code book, or the beam coefficient of the code word in benchmark code book is carried out What calculus of differences obtained.

Wherein, absolute pre-coding matrix instruction (i.e. absolute PMI) is index or label of the code word in benchmark code book, can also Referred to as benchmark PMI, basis PMI etc.；Differential precoding matrix instruction (i.e. difference PMI) be index of the code word in differential codebook or Label is referred to as opposite PMI.Code word is referred to as pre-coding matrix.Therefore differential codebook is mapped from benchmark code book Obtain, refer to that each difference PMI is corresponding with the partial codeword in benchmark code book in the differential codebook, or with benchmark code book In the absolute PMI in part it is corresponding.

Since the code word in differential codebook is that selected section code word obtains from benchmark code book, therefore what differential codebook included Number of codewords is less than the number of codewords that benchmark code book includes, therefore the bit number of difference PMI of the same code word in differential codebook It is less than the bit number of absolute PMI of the code word in benchmark code book.Therefore, in the embodiment of the present application, transmitting terminal is sent pre- It include that difference PMI can drop compared with being all made of mode of the absolute PMI to indicate code word at present in encoder matrix instruction information Low signaling overheads.In addition, the embodiment of the present application makes each subband group have corresponding absolute PMI or difference PMI, same height The pre-coding matrix used with the subband in group is identical, and the pre-coding matrix used between each subband group can be different, thus It can be improved the anti-interference ability between each subband group, substantially improve the spectrum efficiency and system performance of system.

In a kind of optional embodiment, the pre-coding matrix instruction of the first subband group is determined based on benchmark code book Absolute PMI, may comprise steps of: the transmitting terminal selects the code word of first subband group from the benchmark code book； The transmitting terminal determines the absolute PMI of first subband group based on the code word of first subband group.Wherein, transmitting terminal can be with The code word of first subband group is selected from benchmark code book according to the channel information of the first subband group of measurement；Correspondingly, transmitting Hold the absolute PMI using the code word in benchmark code book as the PMI of first subband group.

In a kind of optional embodiment, the corresponding pre-coding matrix instruction of first subband group is based on differential code The difference PMI of this determination, moreover, the differential codebook is the corresponding differential codebook of code word in broadband.

Wherein, in up-link, broadband can be the full bandwidth channel of uplink, can also only refer to that terminal device is scheduled Bandwidth；In downlink system, broadband can be terminal device according to the bandwidth of measurement acquisition.

Specifically, transmitting terminal determines that the difference PMI of the first subband group may comprise steps of: the transmitting terminal is from difference The code word of first subband group is selected in code book；The transmitting terminal determines that the difference of first subband group prelists according to the code word Code matrix instruction；The differential codebook is to map to obtain by the code word in broadband, and the code word in broadband is by the transmitting terminal according to measurement The channel information in the broadband select from the benchmark code book.Alternatively, transmitting terminal determines that the difference PMI of the first subband group can It is described with the following steps are included: transmitting terminal determines the differential precoding matrix instruction of first subband group from differential codebook Differential codebook is mapped by the code word in the broadband, and the code word in the broadband is the institute by the transmitting terminal according to measurement What the channel information for stating broadband selected to obtain from the benchmark code book.

In a kind of optional embodiment, the pre-coding matrix instruction of second subband group is true based on differential codebook Fixed difference PMI, the differential codebook are mapped by the code word of the subband group adjacent with second subband group, i.e., this is adjacent Subband group the corresponding differential codebook of code word.As it can be seen that since channel has certain channel relevancy on frequency domain, it is such as adjacent Subband between correlation it is relatively high, the difference of channel also can be corresponding smaller, therefore, from adjacent with the second subband group Subband group the corresponding differential codebook of code word in select code word when, on the one hand can be more accurate approach channel, another party Face, the code word selected from differential codebook can feed back the difference PMI of the code word when feeding back PMI, so as to reduce signaling Expense.

In the embodiment, transmitting terminal determines that the difference PMI of the second subband group may comprise steps of: the transmitting terminal Determine that differential codebook, the differential codebook are to map to obtain by the code word of the subband group adjacent with second subband group；It is described Transmitting terminal selects the code word of the second subband group from the differential codebook, determines second son according to the code word of second subband group Difference PMI with group, i.e. difference PMI of the code word of second subband group in the differential codebook is as second subband group PMI.Alternatively, transmitting terminal determines that the difference PMI of the second subband group may comprise steps of: the transmitting terminal is from differential codebook Determine the differential precoding matrix instruction of second subband group, the differential codebook is by adjacent with second subband group The corresponding code word of subband group maps.

Wherein, the first subband group and the second subband group be in contrast, in the embodiment, the PMI of the second subband group It is to be obtained from the PMI of the first subband group starting recursion.Therefore, the first subband group is referred to as starting subband group, benchmark Subband group, basic subband group, absolute subband group etc.；Correspondingly, the second subband group is properly termed as difference subband group, opposite subband Group is for the first subband group.

In the embodiment, the PMI of the second subband group is obtained from the PMI of the first subband group starting recursion, can be with The following steps are included:

The code word of the first subband group is selected in the corresponding differential codebook of the code word in transmitting terminal from benchmark code book or broadband, and Using the code word of the first subband group absolute PMI in benchmark code book or the difference PMI in the differential codebook as the first son PMI with group；

Transmitting terminal determines the corresponding differential codebook of the code word of first subband group, selects and is somebody's turn to do from determining differential codebook The code word of the second adjacent subband group of first subband group, by difference PMI of the code word of second subband group in the differential codebook PMI as second subband group；

Transmitting terminal determines the corresponding differential codebook of the code word of second subband group, selects and is somebody's turn to do from determining differential codebook The code word of adjacent another second subband group of second subband group, by difference of the code word of second subband group in the differential codebook PMI of the PMI as second subband group；

Etc., and so on, until determining the PMI of all second subband groups in broadband.

As it can be seen that the code word and difference PMI of the second subband group are from the subband group adjacent with itself in above-mentioned recursive process It is selected in the corresponding differential codebook of code word.Wherein, convenient for statement, in the embodiment of the present application, by the code word pair of a subband group As soon as the differential codebook answered is referred to as the differential codebook of subband group, correspondingly, the differential codebook of a subband group refers to the subband group The corresponding differential codebook of code word.Specifically, the recursive process may include following example:

In an example it is assumed that broadband includes first subband group, then:

For in broadband mark be less than first subband group mark the second subband group, the code word of second subband group and Difference PMI is selected from the differential codebook of subband group adjacent with second subband group and bigger than the mark of second subband group It selects；

Correspondingly, being greater than the second subband group of the mark of first subband group, second subband group for mark in broadband Code word and difference PMI be difference from adjacent with the second subband group and small subband group of mark than second subband group It is selected in code book.

In another example, it is assumed that broadband includes that the mark of two the first subband groups and one of them the first subband group is less than The mark of another the first subband group will identify lesser first subband group and be denoted as the first subband group A, identifies biggish in the two First subband group is denoted as the first subband group B, then:

For the second subband group of mark of the mark less than the first subband group A in broadband, the code word of second subband group and Difference PMI is selected from the differential codebook of subband group adjacent with second subband group and bigger than the mark of second subband group It selects；

For mark in broadband greater than the mark of the first subband group A and the second subband of the mark less than the first subband group B Group, the code word and difference PMI of second subband group are from mark adjacent and than second subband group with second subband group It is selected in the differential codebook of big subband group；

Correspondingly, for the second subband group of mark of the mark greater than the first subband group B in broadband, second subband group Code word and difference PMI are the differential codes from subband group adjacent with second subband group and smaller than the mark of second subband group It is selected in this.

Optionally, the of the mark for mark in broadband greater than the first subband group A and mark less than the first subband group B Two subband groups, the code word and difference PMI of second subband group can also be from adjacent with second subband group and than second son It is selected in differential codebook with the small subband group of the mark of group.That is, being in two the first subband groups for identifying The second subband group between mark is to identify lesser first subband group for starting recursion, or to identify biggish first Subband group be starting recursion, can as signaling, in advance agreement or agreement as defined in mode determine.

As it can be seen that the code word and difference PMI of the second subband group are passed from the first subband group for starting in above-mentioned recursive process Acquisition is pushed away, and specific recursion mode is not limited to above-mentioned example.

In another optional embodiment, the PMI of the second subband group is the difference PMI determined based on differential codebook, But unlike a upper embodiment, which is the corresponding differential codebook of code word in broadband.That is, the implementation In mode, the code word of all subband groups and difference PMI are selected from the corresponding differential codebook of code word in broadband in the broadband It selects.

In the embodiment, the broadband-based differential codebook of transmitting terminal determines the difference PMI of each subband group, may include with Lower step: transmitting terminal determines differential codebook, which is that the code word in broadband maps, and the code word in broadband is according to survey What the channel information in the broadband of amount was selected from benchmark code book；Transmitting terminal selects the code word of each subband group from the differential codebook； Then；Using difference PMI of the code word of each subband group in the differential codebook as the PMI of each subband group.

In the embodiment of above-mentioned various determining difference PMI, if the corresponding differential code of the code word for using broadband determined originally Difference PMI, then transmitting terminal also needs the PMI for sending broadband, in this way, receiving end just can root other than sending the PMI of each subband group The code word in broadband is determined according to the PMI in broadband, and then differential codebook is determined according to the code word in the broadband, it is further to be used to Determine the code word that the difference PMI of code word corresponding to the difference PMI of the first subband group or the second subband group is answered.

It is above-mentioned it is found that the method for determination of the PMI of the first subband group and the second subband group is not necessarily identical, therefore transmitting terminal and connect Receiving end also needs to know which is the first subband group in each subband group, which is the second subband other than knowing the PMI of each subband group Group in order to determine the code word or PMI of the first subband group using above-mentioned optional embodiment, and determines the second subband group Code word or PMI.Therefore in a kind of optional embodiment, the first subband group can be predefined, or by downlink signaling It is reported after the measurement of notified or channel by uplink signaling.For example, can be with by predefined first subband group Identify maximum subband group or perhaps for subband group mark is minimum to identify between two parties in all subband groups contained in broadband Subband group.For another example being the corresponding subband of mark carried in the downlink signaling by the first subband group that downlink signaling notifies Group.In another example by the first subband group that uplink signaling reports being the mark pair carried in the uplink signaling after channel measurement Subband group answered, etc..Wherein, the first subband group reported after channel measurement by uplink signaling can be channel information and width The immediate subband group of the channel information of band.

Since subband group may include a subband, or including multiple subbands.It, should when subband group includes multiple subbands It can be binding (bounding) relationship between multiple subbands, therefore the mark for the subband for notifying the first subband group to include can be passed through Mode determine the first subband group.For example, by predefined first subband group can for comprising subband mark it is minimum Perhaps comprising subband the maximum subband group of mark or for comprising subband mark subband group placed in the middle, the mark of subband Know placed in the middle in the mark for referring to mark all subbands contained in broadband of the subband between two parties.For another example by downlink signaling into First subband group of row notice is the subband group that subband corresponding to the mark of the subband carried in downlink signaling is constituted.Example again Such as, the mark of subband of first subband group to carry in uplink signaling reported after channel measurement by uplink signaling is right The subband group, etc. that the subband answered is constituted.

It include difference precoding in the pre-coding matrix instruction information that transmitting terminal is sent in a kind of optional embodiment Matrix instruction, be it is predefined, carried out after the measurement of perhaps being notified by downlink signaling or channel by uplink signaling Report, thus, so that being capable of determining that the corresponding code of each subband group after receiving end receives the pre-coding matrix instruction information Word.

Further, it can be seen from the above, the method for determination of the PMI of the first subband group and the second subband group includes a variety of implementations Mode, three kinds of embodiments as described in lower section:

The differential codebook that the PMI of one: the first subband group of the embodiment and PMI of the second subband group is all based on broadband determines Difference PMI.

The PMI of two: the first subband group of embodiment is the difference PMI that broadband-based differential codebook determines, the second subband The PMI of group is the difference PMI determined based on the differential codebook of the subband group adjacent with itself；

The PMI of three: the first subband group of embodiment is the absolute PMI, the PMI of the second subband group determined based on benchmark code book It is the difference PMI determined based on the differential codebook of the subband group adjacent with itself；

Therefore above-mentioned three kinds of embodiments are directed to, transmitting terminal also needs real used by the pre-coding matrix instruction information that will be sent Applying mode is which kind of above-mentioned embodiment is informed to receiving end.For example, prelisting for transmitting terminal transmission can be indicated with instruction information Embodiment corresponding to PMI in code matrix instruction information.For example, in order to indicate above-mentioned three kinds of embodiments, the instruction information 3 bits are needed, 00 indicates embodiment one, and 01 indicates embodiment two, and 10 indicate embodiment three.It optionally, 11 can table Show that each PMI is absolute PMI.Correspondingly, predefined PMI can be determined using which kind of embodiment.Or believed by downlink Enable notice can carry the instruction information using which kind of embodiment when determining PMI, in the downlink signaling.Or channel measurement Which kind of reported afterwards using embodiment by uplink signaling come when determining PMI, which can carry the instruction information.

In a kind of optional embodiment, the differential codebook is to map to obtain from the benchmark code book, comprising: The code word that the differential codebook includes is selected from the code word for meeting preset rules in the benchmark code book.Wherein, this is full The code word of sufficient preset rules is code word of the distance between the target code word within pre-determined distance, or between target code word Correlation meet the code word of preset condition, or the code word of calculus of differences selection is carried out to the beam coefficient of target code word.

Wherein, target code word is the code word in broadband or the code word of the subband group adjacent with the second subband group, is somebody's turn to do and second The adjacent subband group of subband group can be the first subband group or the second subband group.

Wherein, calculus of differences is carried out to the beam coefficient of target code word to determine the corresponding differential codebook of target code word When, which can be carries out calculus of differences to beam coefficient middle width strip coefficient and narrowband coefficient as a whole, also It can be and calculus of differences is carried out to phase parameter in beam coefficient, be also possible to i.e. to wideband coefficients and narrowband coefficient as one It is whole to carry out calculus of differences, calculus of differences also is carried out to phase parameter.

Above-mentioned optional embodiment elaborates how to determine the corresponding differential codebook of target code word, but the embodiment of the present application In how to determine that the corresponding differential codebook of target code word is not limited to embodiment described above.Optionally, in benchmark code book What the corresponding differential codebook of each code word can provide for agreement, what receiving end and transmitting terminal had been known, in this way, transmitting terminal Code word is determined with receiving end, the corresponding differential codebook of the code word can be known by way of tabling look-up, it is thus possible to reduce hair Penetrate end and received processing complexity.The code word that differential codebook includes can be determined based on above embodiment, for each code Word corresponding difference PMI can corresponding absolute PMI be determined in benchmark code book based on the code word.

In a kind of optional embodiment, the difference PMI and ascending or descending order of each code word that the differential codebook includes The absolute PMI of each code word after arrangement is corresponding.For example, it is assumed that the differential codebook includes four code words, then in the differential codebook Difference PMI needed for bit number be 2 bits, difference PMI is respectively 00,01,10,11 in the differential codebook, if the difference The absolute PMI of each code word after the difference PMI of each code word of code book is arranged with ascending order is corresponding, then 00,01,10,11 is right respectively The code word answered is the code word of absolute PMI successively from small to large；If after the difference PMI of each code word of the differential codebook and descending arrangement Each code word absolute PMI it is corresponding, then 00,01,10,11 corresponding code words be absolute PMI successively from big to small Code word.

In a kind of optional embodiment, code word number M and overhead size, the system performance that differential codebook includes have It closes, i.e., M is bigger, indicates that bit number needed for the pre-coding matrix instruction of code word is more in the differential codebook, signaling overheads is just It is bigger, but optional code word is more in the differential codebook, and each optional code word of subband group is more, therefore system performance is also got over It is good；Correspondingly, M is smaller, indicate that bit number needed for the pre-coding matrix instruction of code word is fewer in the differential codebook, signaling is opened Pin is just smaller, but optional code word is less in the differential codebook, and each optional code word of subband group is fewer, therefore, system performance With regard to more relatively poor.Therefore, the numerical value for comparing compromise, such as M=2 can be selected under the balance of signaling overheads and system performance When, the pre-coding matrix instruction in the differential codebook only needs 1bit, M=4, and the pre-coding matrix instruction in the differential codebook then needs Want 2bit.For example, the pre-coding matrix instruction to indicate code word that differential codebook includes, i.e. needed for the difference PMI of differential codebook Bit number be 1-4 bit when, can achieve improve system performance while, reduce signaling overheads.

On the other hand, the embodiment of the present application also provides a kind of pre-coding matrix instruction method, the pre-coding matrix instruction side Method is illustrated using receiving end as executing subject, may comprise steps of: receiving end receives at least one first subband group Pre-coding matrix instruction and at least one the second subband group pre-coding matrix instruction；The receiving end is according to described at least one The absolute pre-coding matrix instruction of a first subband group determines the code word of at least one first subband group from benchmark code book Or according to the instruction of the differential precoding matrix of at least one first subband group determined from differential codebook it is described at least one The code word of first subband group；And it is true from differential codebook according to the pre-coding matrix instruction of at least one second subband group The code word of fixed at least one second subband group；The differential codebook is to map to obtain from the benchmark code book.As it can be seen that The embodiment of the present application makes each subband group have corresponding absolute PMI or difference PMI, and the subband in the same subband group uses Pre-coding matrix it is identical, and the pre-coding matrix used between each subband group can be different, so as to improve each subband group Between anti-interference ability, substantially improve the spectrum efficiency and system performance of system.

Wherein, receiving end indicates to determine from differential codebook according to the differential precoding matrix of at least one the first subband group The code word of at least one first subband group, there are two types of situations, a kind of, when the differential codebook is each difference PMI and reference number Partial codeword is corresponding in this, then receiving end can be according to the difference PMI of at least one the first subband group from the differential codebook Directly determine out the code word of at least one the first subband group；Another kind, when in difference PMI each in the differential codebook and benchmark code book Part absolutely PMI is corresponding, then receiving end can be first from the differential codebook according to the difference PMI of at least one the first subband group The absolute PMI for determining at least one the first subband group, further according at least one the first subband group absolute PMI from benchmark code book In determine the code word of at least one the first subband group.

Correspondingly, receiving end is indicated from differential codebook really according to the differential precoding matrix of at least one the second subband group The code word of fixed at least one second subband group, there are two types of situations, a kind of, when the differential codebook is each difference PMI and benchmark Partial codeword is corresponding in code book, then receiving end can be according to the difference PMI of at least one the second subband group from the differential codebook In directly determine out the code word of at least one the second subband group；Another kind, as difference PMI each in the differential codebook and benchmark code book The middle absolute PMI in part is corresponding, then receiving end can be according to the difference PMI of at least one the second subband group from the differential codebook The absolute PMI for first determining at least one the second subband group, further according at least one the second subband group absolute PMI from reference number The code word of at least one the second subband group is determined in this.

In a kind of optional embodiment, the pre-coding matrix instruction method further include: the code in receiving end acquisition broadband Word；The receiving end determines the code word mapped differential codebook in the broadband, described at least using the differential codebook as determination Differential codebook used in the code word of one the first subband group.I.e. receiving end can be according to the difference PMI and width of the first subband group The differential codebook of band determines the code word of the first subband group.Wherein, the code word in broadband is that receiving end according to transmitting terminal sends the broadband Absolute PMI and benchmark code book determine.

In a kind of optional embodiment, the pre-coding matrix instruction method further include: for it is described at least one the The second subband group of each of two subband groups, the receiving end obtain the code word of the subband group adjacent with second subband group； The receiving end determines the code word mapped differential codebook of the adjacent subband group, using the differential codebook as described in determination Differential codebook used in the code word of second subband group.I.e. receiving end can according to the difference PMI of the second subband group and with this The differential codebook of the adjacent subband group of second subband group determines the code word of the second subband group.Wherein, the code word of the second subband group is It is that starting recursion obtains with the code word of the first subband group.

Specifically, it is that starting recursion obtains that the code word of the second subband group, which is with the code word of the first subband group, may include Following steps:

Receiving end determines the code word of the first subband group, Huo Zhegen according to the absolute PMI of the first subband group from benchmark code book The code word of the first subband group is determined from the differential codebook in broadband according to the difference PMI of the first subband group；

Receiving end determines the differential codebook of the code word of the first subband group, according to one second son adjacent with first subband group Difference PMI with group determines the code word of second subband group from the differential codebook of first subband group；

Receiving end determines the differential codebook of the code word of second subband group, according to adjacent with second subband group another The difference PMI of two subband groups determines the code word of another second subband group from the differential codebook of second subband group；

Etc., and so on, until determining the code word of all second subband groups in broadband.

As it can be seen that in above-mentioned recursive process, the code word of the second subband group be according to the difference PMI of second subband group and with What the differential codebook of itself adjacent subband group determined.Specifically, the recursive process may include following example:

In an example it is assumed that broadband includes first subband group, then:

It is less than the second subband group of the mark of first subband group for mark in broadband, the code word of second subband group is According to the difference PMI of itself from the difference of adjacent with the second subband group and big subband group of mark than second subband group It is determined in code book；

Correspondingly, being greater than the second subband group of the mark of first subband group, second subband group for mark in broadband Code word be according to itself difference PMI from subband adjacent with second subband group and smaller than the mark of second subband group It is determined in the differential codebook of group.

For the second subband group of mark of the mark less than the first subband group A in broadband, the code word of second subband group is According to the difference PMI of itself from the difference of adjacent with the second subband group and big subband group of mark than second subband group It is determined in code book；

For mark in broadband greater than the mark of the first subband group A and the second subband of the mark less than the first subband group B Group, the code word of second subband group are according to itself difference PMI from adjacent with second subband group and than second subband It is determined in the differential codebook of the big subband group of the mark of group；

Correspondingly, for the second subband group of mark of the mark greater than the first subband group B in broadband, second subband group Code word is according to itself difference PMI from subband group adjacent with second subband group and smaller than the mark of second subband group Differential codebook in determine.

Optionally, the of the mark for mark in broadband greater than the first subband group A and mark less than the first subband group B Two subband groups, the code word of second subband group be also possible to according to itself difference PMI from adjacent with second subband group and It is determined in the differential codebook of the subband group smaller than the mark of second subband group.That is, for mark in two the The second subband group between the mark of one subband group is to identify lesser first subband group for starting recursion, or with mark Biggish first subband group be starting recursion, can as signaling, in advance agreement or agreement as defined in mode determine.

As it can be seen that the code word of the second subband group is obtained from the first subband group starting recursion in above-mentioned recursive process, And specific recursion mode is not limited to above-mentioned example.

In another optional embodiment, the code word of the second subband group is according to itself difference PMI from broadband It is determined in the corresponding differential codebook of code word.For example, the code word of subband group all in the broadband is the difference according to itself It is determined in the corresponding differential codebook of the code word in PMI from broadband.

Wherein, the broadband-based differential codebook in receiving end determines the code word of each subband group, may comprise steps of: receiving It holds and determines differential codebook, which is that the code word in broadband maps, and the code word in broadband is the absolute PMI according to broadband It is determined from benchmark code book；Transmitting terminal determines each subband group according to the difference PMI of each subband group from the differential codebook Code word.

In the embodiment of above-mentioned various determining code words, if the corresponding differential codebook of the code word for using broadband, transmitting terminal Other than sending the PMI of each subband group, the PMI for sending broadband is also needed, in this way, receiving end can just be determined according to the PMI in broadband The code word in broadband out, and then differential codebook is determined according to the code word in the broadband, to be used to further determining first subband group Code word or the second subband group code word.

In a kind of optional embodiment, first subband group is predefined, or is led to by downlink signaling It is reported after the measurement of know or channel by uplink signaling.

In a kind of optional embodiment, the differential codebook is to map to obtain from the benchmark code book, comprising: The code word that the differential codebook includes is selected from the code word for meeting preset rules in the benchmark code book.

In a kind of optional embodiment, the code word for meeting preset rules is that the distance between target code word exists Code word in pre-determined distance, or correlation between target code word meet the code word of preset condition.

In a kind of optional embodiment, the differential codebook is to map to obtain from the benchmark code book, comprising: The code word that the differential codebook includes is to carry out calculus of differences acquisition to the beam coefficient of code word in the benchmark code book.

In a kind of optional embodiment, the target code word is the code word in broadband or is and second subband group The code word of adjacent subband group.

In a kind of optional embodiment, the differential precoding matrix instruction of each code word that the differential codebook includes with The absolute pre-coding matrix instruction of each code word after ascending or descending order arrangement is corresponding.

In a kind of optional embodiment, the beam coefficient of the code word in the differential codebook is to the benchmark code book In the beam coefficient of code word carry out calculus of differences acquisition.

In a kind of optional embodiment, the bit number of the difference PMI for the code word that the differential codebook includes is 1-4 ratio It is special.

It include that difference is pre- in a kind of optional embodiment, in the pre-coding matrix instruction information that the transmitting terminal is sent Encoder matrix instruction, be it is predefined, after the measurement of perhaps being notified by downlink signaling or channel by uplink signaling into What row reported.

In this aspect, related illustrate of above content can be with reference to related content described in first aspect, herein no longer in detail It states.

Another aspect, the embodiment of the invention also provides a kind of equipment, which, which has in realization above method example, is sent out Penetrate some or all of end or receiving end function, for example the function of the equipment some or all of can have in the application embodiment In function, can also have individually implement the application in any one embodiment function.The function can pass through hardware It realizes, corresponding software realization can also be executed by hardware.The hardware or software include one or more and above-mentioned function Corresponding unit or module.

It may include processing unit and communication unit in the structure of the equipment in a kind of possible design, the processing is single Member is configured as that terminal device is supported to execute corresponding function in the above method.The communication unit for support terminal device with Communication between other equipment.The terminal device can also include storage unit, and the storage unit is used for and processing unit Coupling saves the necessary program instruction of terminal device and data.As an example, processing unit can be processor, communication unit Member can be transceiver, and storage unit can be memory.

Another aspect, the embodiment of the present invention provide a kind of equipment, which can be the network equipment, have and realize above-mentioned side Some or all of transmitting terminal and/or receiving end function in method example, such as the function of the equipment can have the portion in the application Point or whole embodiments in function, can also have individually implement the application in any one embodiment function.The function Corresponding software realization can also can be executed by hardware by hardware realization.The hardware or software include one or Multiple units corresponding with above-mentioned function or module.

It include processing unit and communication unit, the processing unit in the structure of the equipment in a kind of possible design It is configured as that transmitting terminal and/or receiving end is supported to execute corresponding function in the above method.The communication unit is set for supporting The standby communication between other equipment.The equipment can also include storage unit, and the storage unit is used for and processing unit Coupling saves the necessary program instruction of equipment and data.As an example, processing unit can be processor, communication unit can Think transceiver, storage unit can be memory.

Another aspect, the embodiment of the invention provides a kind of communication system, which includes the transmitting terminal of above-mentioned aspect, connects Receiving end.In alternatively possible design, the system can also include scheme provided in an embodiment of the present invention in transmitting terminal and/ Or the other equipment that receiving end interacts.

Another aspect, the embodiment of the invention provides a kind of computer storage mediums, for being stored as above-mentioned transmitting terminal institute Computer software instructions comprising for executing program designed by either above method face.

Another aspect, the embodiment of the invention provides a kind of computer storage mediums, for being stored as above-mentioned receiving end institute Computer software instructions comprising for executing program designed by either above method face.

Another aspect, present invention also provides a kind of computer program products including instruction, when it is transported on computers When row, so that computer executes method described in above-mentioned various aspects.

Another aspect, this application provides a kind of chip system, which includes processor, for supporting whole transmitting End and/or the above-mentioned aspect in receiving end involved in function, for example, determine or processing the above method involved in data and/ Or information.In a kind of possible design, the chip system further includes memory, the memory, for saving transmitting terminal And/or the necessary program instruction in receiving end and data.The chip system can be made of chip, also may include chip and its His discrete device.

Another aspect, this application provides a kind of chip systems, which includes processor, for supporting transmitting terminal And/or function involved in above-mentioned aspect is realized in receiving end, for example, generating or handling data involved in the above method And/or information.In a kind of possible design, the chip system further includes memory, the memory, for saving transmitting End and/or the necessary program instruction in receiving end and data.The chip system, can be made of chip, also may include chip and Other discrete devices.

Detailed description of the invention

Fig. 1 a is the schematic diagram for the subband group that a kind of broadband provided by the embodiments of the present application includes；

Fig. 1 b is the schematic diagram for the subband group that another broadband provided by the embodiments of the present application includes；

Fig. 2 is a kind of structural schematic diagram of communication system provided by the embodiments of the present application；

Fig. 3 is a kind of flow diagram of pre-coding matrix instruction method provided by the embodiments of the present application；

Fig. 4 is the flow diagram of another pre-coding matrix instruction method provided by the embodiments of the present application.

Fig. 5 is a kind of structural schematic diagram of equipment provided by the embodiments of the present application；

Fig. 6 is the schematic diagram of another equipment provided by the embodiments of the present application.

Fig. 7 is a kind of structural schematic diagram of terminal device provided by the embodiments of the present application；

Fig. 8 is the structural schematic diagram of another equipment provided by the embodiments of the present application；

Fig. 9 is a kind of structural schematic diagram of the network equipment provided by the embodiments of the present application.

Specific embodiment

The term that presently filed embodiment part uses is only used for explaining the specific embodiment of the application, rather than It is intended to limit the application.

For signaling overheads needed for reducing pre-coding matrix instruction, the embodiment of the present application provides a kind of pre-coding matrix and refers to Show method, which indicates (Pre-coding matrix using differential precoding matrix Indicator, PMI) indicate code word, i.e. pre-coding matrix, indicate the mode phase of code word with absolute PMI is all made of at present Than can reduce the expense of signaling.

In the embodiment of the present application, absolute pre-coding matrix instruction (i.e. absolute PMI) is index of the code word in benchmark code book Or label, alternatively referred to as benchmark PMI, basis PMI etc.；Differential precoding matrix indicates that (i.e. difference PMI) is code word in differential code Index or label in this are referred to as opposite PMI.Code word is referred to as pre-coding matrix.

In a kind of optional embodiment, the differential codebook be from the benchmark code book mapping obtain refer to difference The code word that demal originally includes is selected from the code word for meeting preset rules in benchmark code book, therefore the code word that differential codebook includes Quantity is less than the number of codewords that benchmark code book includes, therefore the bit number of difference PMI of the same code word in differential codebook wants small In the bit number of absolute PMI of the code word in benchmark code book.Therefore, in the embodiment of the present application, transmitting terminal using difference PMI come Indicate that the mode of code word can reduce signaling overheads compared with being all made of mode of the absolute PMI to indicate code word at present.In addition, The embodiment of the present application makes each subband group have corresponding absolute PMI or difference PMI, and the subband in the same subband group uses Pre-coding matrix it is identical, and the pre-coding matrix used between each subband group can be different, so as to improve each subband group Between anti-interference ability, substantially improve the spectrum efficiency and system performance of system.

Wherein, which is code word of the distance between the target code word within pre-determined distance, The distance between each code word and the target code word i.e. in calculating benchmark code book, therefrom select in pre-determined distance or distance The smallest code word constitutes the differential codebook of the target code word.Wherein, which refers to the norm after two code words are subtracted each other.Again or Person, this meets the code word that code word of preset rules meets preset condition for the correlation between target code word, i.e. calculating benchmark Correlation in code book between each code word and the target code word therefrom selects the code word of correlation maximum to constitute the target code word Differential codebook.Wherein, correlation refers to the related coefficient between two code words, and the related coefficient is between section 0 and 1, two The related coefficient of code word indicates that the correlation between two code words is bigger closer to 1.

In another optional embodiment, the code word in differential codebook is the wave beam system to the code word in benchmark code book Number carries out calculus of differences acquisition.For example, carry out calculus of differences to the beam coefficient of target code word, from benchmark code book selection with The code word for the most similar beam coefficient of beam coefficient that the calculus of differences obtains constitutes the differential codebook of the target code word.

Wherein, benchmark code book is code book specified in agreement, the code book that transmitting terminal and receiving end can obtain.Currently, Benchmark code book can be referred to as type I (type I) and Type II (type II) there are two types of type in downlink system.For The benchmark code book of I type of type determines that the wave beam of subband group is adjusted to the wave beam in fixed broadband or adjacent sub-bands group It is whole, new wave beam is obtained, and it is directed to the benchmark code book of II type of type, determine that the wave beam of subband group is to broadband or adjacent sub-bands The beam coefficient of the wave beam of group is adjusted, and acquisition is same wave beam.In up-link, benchmark code book can be single-stage code This, i.e., select a code word to carry out uplink on broadband from single-stage code book.The broadband can believe for the full bandwidth of uplink Road, or the scheduled bandwidth of terminal device.Wherein, benchmark code book described in the embodiment of the present application may include above-mentioned The code book of type, but be not limited to the code book of the above-mentioned type, i.e., with the evolution of standard, or other codes as defined in agreement This.

In the embodiment of the present application, the code word number M that differential codebook includes can be in the balance of signaling overheads and system performance The lower numerical value for selecting to compare compromise, value can be 2,4,8 etc., and when such as M=2, the difference PMI in the differential codebook is only needed 1bit；M=4, the difference PMI in the differential codebook then need 2bit.For example, bit needed for difference PMI with differential codebook When number is 1-4 bit, while can achieve improvement system performance, signaling overheads is reduced.

Wherein, the corresponding difference PMI of each code word can be corresponding in benchmark code book based on the code word in differential codebook Absolute PMI is determined.In a kind of optional embodiment, the difference PMI and ascending order of each code word that the differential codebook includes Or the absolute PMI of each code word after descending arrangement is corresponding.For example, it is assumed that the differential codebook includes four code words, the then difference Bit number needed for difference PMI in code book is 2 bits, and difference PMI is respectively 00,01,10,11 in the differential codebook, if The absolute PMI of each code word after the difference PMI of each code word of the differential codebook and ascending order arrange is corresponding, then and 00,01,10,11 Corresponding code word is the code word of absolute PMI successively from small to large；If the difference PMI and descending of each code word of the differential codebook The absolute PMI of each code word after arrangement is corresponding, then 00,01,10,11 corresponding code words be absolute PMI successively from greatly to Small corresponding code word.

The embodiment of the present application respectively by benchmark code book be II type of single-stage code book and type code book for, to illustrate how The corresponding differential codebook of target code word is obtained from benchmark code book.Wherein, in the embodiment of the present application, target code word can be on the basis of Any code word in code book, and transmitting terminal determine target code word used when the PMI of each subband group can for broadband code word or The code word of the subband group adjacent with the second subband group.The code word of the subband group adjacent with the second subband group can be the first subband The code word of group or the code word of other the second subband groups.

One benchmark code book of example be single-stage code book, the code word that differential codebook includes be from benchmark code book with target code word it Between distance the smallest code word in select.

Please refer to table 1, table 1 be it is provided by the embodiments of the present application it is a kind of using four antenna ports progress single layer transmissions when can The pre-coding matrix of choosing.As shown in table 1, each code word has a corresponding pre-coding matrix instruction, the precoding in the table Matrix instruction is from left to right gradually incremented by be corresponded with code word from left to right, i.e. the corresponding code word of a PMI.Such as PMI Corresponding code word is 1/2 [1 00 0] when being 0^T, corresponding code word is 1/2 [0 10 0] when PMI is 1^T, it is corresponding when PMI is 2 Code word be 1/2 [0 01 0]^T, etc..

Table 1

Wherein, PMI of the code word in table 1 is known as absolute PMI, and each code word has corresponding differential codebook in the table 1, should The design of differential codebook can there are many, for example consider the distance between code word, correlation etc..

For example, when considering the corresponding differential codebook of code word that absolute PMI is 15, it is assumed that the differential codebook includes 4 code words, Then selected from benchmark code book shown in table 1 with absolute PMI for 15 code word apart from shortest three code words, two code words The distance between for the norm after subtracting each other two code words, for example, the norm between code word x1 and code word x2 the two matrixes is just For | | x1-x2 | |.Therefore the code word that can be 15 with each code word in computational chart 1 and absolute PMI, i.e., with 1/2 [1 1-j-j]^TIt Between norm, therefrom select the smallest four code words, such as absolute PMI be respectively 12,15,17 and 18 code word, i.e., 1/2 [1 11 -1]^T、1/2[1 1 –j -j]^T、1/2[1 j j 1]^T、1/2[1 j –1 -j]^T。

Assuming that the differential codebook include 4 code words, then in the differential codebook each code word mark, that is, difference PMI from it is small to It is followed successively by 00,01,10,11 greatly, it is assumed that the difference PMI of each code word of the differential codebook is absolute with each code word after ascending order arrangement PMI is corresponding, then difference PMI:00,01,10,11, corresponding absolute PMI:12,15,17 and 18.

Therefore the corresponding relationship in the differential codebook between difference PMI and code word can be as shown in table 2 below,

The differential codebook corresponding with absolute PMI15 of table 2

Difference PMI	00	01	10	11
					Pre-coding matrix (code word)	1/2[1 1 1 -1]^T	1/2[1 1 –j -j]^T	1/2[1 j j 1]^T	1/2[1 j –1 -j]^T

Alternatively, the corresponding relationship in the differential codebook between difference PMI and absolute PMI can be as shown in table 3 below,

Table 3

Difference PMI	00	01	10	11
					Absolute PMI	12	15	17	18

In another example, it is assumed that the difference PMI of each code word of the differential codebook and each code word after descending arrangement Absolute PMI is corresponding, then difference PMI:00,01,10,11, corresponding absolute PMI:18,17,15 and 12.

Therefore the corresponding relationship in the differential codebook between difference PMI and code word can be as shown in table 4 below,

The differential codebook corresponding with absolute PMI15 of table 4

Difference PMI	00	01	10	11
					Pre-coding matrix (code word)	1/2[1 j –1 -j]^T	1/2[1 j j 1]^T	1/2[1 1 –j -j]^T	1/2[1 1 1 -1]^T

Alternatively, the corresponding relationship in the differential codebook between difference PMI and absolute PMI can be as shown in table 5 below,

Table 5

Difference PMI	00	01	10	11
					Absolute PMI	18	17	15	12

As it can be seen that the bit number of the same code word corresponding difference PMI in differential codebook is remote as shown in table 2,3,4,5 Much smaller than the code word, in benchmark code book therefore corresponding absolute PMI is wrapped in the pre-coding matrix instruction information that transmitting terminal is sent Difference PMI is included, compared with the absolute PMI for feeding back same amount of code word, can reduce signaling overheads.

Two benchmark code book of example is the code book of II type of type, and the code word that differential codebook includes is the wave beam to target code word Coefficient carries out calculus of differences acquisition.

The form of expression of the code book of II type of type is as follows:

Wherein, L expression comes to L beam combination, p^(WB)It is the range coefficient in broadband, 3 bits of the range coefficient To indicate；p^(SB)It is the range coefficient of narrowband, which is indicated with 1 bit；C is phase coefficient, if orthorhombic phase It moves keying (Quadrature Phase Shift Keyin, QPSK), then 2 bits is needed to indicate, if 8QPSK, then should Phase coefficient needs to be indicated with 3 bits.

Assuming that the code word that the differential codebook includes is the range coefficient of the range coefficient and narrowband to the broadband of target code word As a whole, i.e., the range coefficient to target code word carries out calculus of differences acquisition；The size of the differential codebook be comprising 4 code words, i.e. difference PMI need 2 bits to indicate each code word；And the target code word is that transmitting terminal measures the first subband group The code word that is selected from benchmark code book of channel information, the range coefficient of the code word is 1, carries out calculus of differences to the range coefficient The range coefficient obtained afterwards is respectivelyCorrespondingly, range coefficient and these width in benchmark code book Degree immediate 4 code words of coefficient may make up the differential codebook of the range coefficient of the target code word.Correspondingly, 4 code words Difference PMI can be for 00,01,10,11 compared with narrowband all in narrowband feedback is using the range coefficient in identical broadband, letter Road quantization is more accurate.

Assuming that the code word that the differential codebook includes is to carry out calculus of differences acquisition, the difference to the phase coefficient of target code word Demal sheet includes 4 code words, i.e. difference PMI needs 2 bits to indicate each code word；Assuming that target code word is that absolute phase coefficient is The code word of exp (j (phi)), the absolute phase coefficient use 8psk；Based on the absolute phase coefficient, angle is according to certain step Long (delta_phi) is rotated, and 4 obtained phase coefficient is respectively as follows:

[exp(j(phi-delta_phi))exp(j(phi))exp(j(phi+delta_phi))exp(j(phi+2* Delta_phi))] or

[exp(j(phi-2*delta_phi))exp(j(phi-delta_phi))exp(j(phi))exp(j(phi+ delta_phi))]

This 4 phase coefficients are the difference PMI:00 01 10 11 for corresponding to phase coefficient, and the difference of the second subband group is pre- The phase information of coding can select in this differential codebook.

In the embodiment of the present application, broadband may include at least one first subband group and at least one second subband group, In, the first subband group is properly termed as starting subband group, benchmark subband group, basic subband group, absolute subband group etc., the second subband group It is properly termed as difference subband group or opposite subband group, is for the first subband group.First subband group and the second subband Group the difference is that, the code word of the two is selected from different code books, and the code word of the first subband group is according to first What the channel information of subband group was selected from benchmark code book, or selected from the corresponding differential codebook of code word in broadband； And the code word of the second subband group is selected from differential codebook corresponding with the code word of the adjacent subband group of second subband group. Wherein, the first subband group, the second subband group include at least one subband.

Since channel has certain channel relevancy on frequency domain, as the correlation between adjacent subband group compares Height, the difference of channel also can be corresponding smaller, therefore, on the one hand, the code word of the second subband group from the second subband group phase What selection can be more accurate in the differential codebook of adjacent subband group approaches channel, on the other hand, the option code from differential codebook Word can be with feedback differential PMI, to reduce the expense of signaling when feeding back PMI.

In a kind of optional embodiment, the first subband group can be predefined, or be led to by downlink signaling It is reported after the measurement of know or channel by uplink signaling.For example, can be subband by predefined first subband group Group mark is minimum to identify maximum subband group or perhaps to identify subband placed in the middle in all subband groups contained in broadband Group.For another example being the corresponding subband group of mark carried in the downlink signaling by the first subband group that downlink signaling notifies.Again For example, by the first subband group that uplink signaling reports being the corresponding son of mark carried in the uplink signaling after channel measurement Band group, etc..Wherein, the first subband group reported after channel measurement by uplink signaling can be the letter of channel information and broadband The immediate subband group of road information.

For example, please referring to Fig. 1 a, Fig. 1 a is the division for the subband group that a kind of broadband provided by the embodiments of the present application is included Schematic diagram.As shown in Figure 1a, which may include multiple subband groups, and multiple subband group is continuous subband group, respectively Subband group m-2, subband group m-1, subband group m, subband group m+1, subband group m+2, subband group m+3, subband group m+4.In the broadband Two the first subband groups are determined by advice method described above, are subband group m and subband group m+3 respectively, in the broadband Other subband groups in addition to subband group m and subband group m+3 are respectively the second subband group.Therefore, subband group m and subband group m+3 Identify m, m+3 can be predefined first subband group mark, perhaps for uplink signaling carry mark or be downlink believe The mark carried is enabled, so that transmitting terminal and receiving end can know the mark for belonging to the first subband group.

For another example please referring to Fig. 1 b, Fig. 1 b is the subband group that another broadband provided by the embodiments of the present application is included Divide schematic diagram.As shown in Figure 1 b, which may include multiple subband groups, and multiple subband group is discrete subband group, The subband group that i.e. broadband includes is subband group m-2, subband group m-1, subband group m, subband group m+2, subband group m+3, subband group m + 4, wherein the broadband includes first subband group, i.e. subband group m is the first subband group, and subband group m-2, subband group m-1, Subband group m+2, subband group m+3, subband group m+4 and subband group m+4 are respectively the second subband group, wherein the broadband does not include Subband group m+1.Therefore, the mark m of subband group m can be the mark of predefined first subband group, or take for uplink signaling The mark of band, or the mark carried for downlink signaling, so that transmitting terminal and receiving end, which can be known, belongs to the first subband group The mark of subband group.

In the embodiment of the present application, when the subband group that broadband includes is continuous subband group, the son adjacent with a subband group It is the upper adjacent subband group of mark with group；When the subband group that broadband includes is discrete subband group, the adjacent son of subband group Band group can be to identify upper non-conterminous subband group, and in Fig. 1 b, subband group m+2 can be used as the son adjacent with subband group m Band group, i.e., adjacent subband group be in the subband group for belong to broadband with the immediate subband group of the mark of the subband group.

The technical solution of terminal device the application can be applied particularly in various communication systems, such as: global system for mobile telecommunications System (Global system for mobile communications, abbreviation: GSM), CDMA (Code Division Multiple Access, abbreviation: CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, abbreviation: WCDMA), TD SDMA (Time Division-Synchronous Code Division Multiple Access, abbreviation: TD-SCDMA), Universal Mobile Communication System (Universal Mobile Telecommunications System, abbreviation: UMTS), long term evolution (Long Term Evolution, abbreviation: LTE) system System etc., with the continuous development of the communication technology, the technical solution of the application can also be used in future network, can also be with such as 5G system It referred to as newly eats dishes without rice or wine (New Radio, abbreviation: NR) system, or can be used for D2D (device to device) system, M2M (machine to machine) system etc..

This application involves the network equipment can refer to a kind of entity for sending or receiving information of network side, such as It can be base station, or can be transfer point (transmission point, abbreviation: TP), transmitting-receiving point (transmission And receiver point, abbreviation: TRP), trunking, or other network equipments for having base station functions etc., this Shen Please without limitation.

In this application, terminal device or terminal device are a kind of equipment with communication function, may include having The handheld device of wireless communication function, mobile unit, wearable device, calculate equipment or be connected to radio modem its Its processing equipment etc..Terminal device can be called different titles in different networks, such as: terminal, terminal device (user Equipment, abbreviation: UE), mobile station, subscriber unit, relaying Relay, platform, cellular phone, personal digital assistant, wirelessly Modem, wireless telecom equipment, handheld device, laptop computer, wireless phone, wireless local loop platform etc..The terminal Equipment can refer to wireless terminal, catv terminal.The wireless terminal can be directed to user and provide voice and/or data connectivity Equipment, handheld device with wireless connecting function or be connected to other processing equipments of radio modem, can To be communicated through wireless access network (such as RAN, radio access network) with one or more core nets.

In this application, base station is alternatively referred to as base station equipment, is that one kind is deployed in wireless access network to provide channel radio The equipment of telecommunication function.The title of base station may be different in different wireless access systems, such as base in a umts network Stand be known as node B (NodeB), base station in the lte networks be known as evolution node B (evolved NodeB, abbreviation: eNB or Person eNodeB), TRP network node or g node B (g-NodeB, gNB), etc. are properly termed as in the following 5G system, herein not It enumerates.

Referring to Fig. 2, Fig. 2 is a kind of structural schematic diagram of communication system provided by the embodiments of the present application.It is convenient for statement, The embodiment of the present application is illustrated by taking Fig. 2 as an example, as shown in Fig. 2, respectively by taking base station and terminal device as an example.

Based on communication system shown in Fig. 2, referring to Fig. 3, Fig. 3 is a kind of pre-coding matrix provided by the embodiments of the present application The flow diagram of indicating means, pre-coding matrix instruction method described in Fig. 3 is illustrated from up-link, such as Fig. 3 Shown, which may comprise steps of:

101, base station selects the code word in broadband according to the channel information in the broadband of measurement from benchmark code book；

102, base station determines the corresponding differential codebook of the code word in broadband；

Wherein, base station determines that the optional embodiment of the corresponding differential codebook of the code word in broadband can be with reference to above-mentioned phase inside the Pass The elaboration of appearance, and will not be described here in detail.The corresponding differential codebook of the code word in broadband is referred to as the differential codebook in broadband, correspondingly, one The corresponding differential codebook of a code word is properly termed as selecting the differential codebook in the broadband of the code word or subband group.

Wherein, in up-link, which is the bandwidth that terminal device is scheduled, and is also possible to the full bandwidth letter of uplink Road.

103, base station from the differential codebook in broadband determine at least one the first subband group code word and at least one second The code word of subband group；

Wherein, each first subband group has corresponding code word, and each second subband group also has corresponding code word.

Wherein, the mode of the first subband group in broadband how is determined, as already mentioned it is possible to for predefined first subband The mark of group, or by downlink signaling, such as wireless heterogeneous networks (Radio Resource Control, RRC) signaling, MAC-ce Or the mark of the first subband group is carried in Downlink Control Information (Downlink Control Information, DCI)；Again or Report the mark etc. of the first subband group after measuring channel by terminal device, specifically can with reference to content described in above-described embodiment, And will not be described here in detail.

104, base station determines the code word of at least one the first subband group corresponding difference PMI and really in the differential codebook The code word of at least one fixed the second subband group corresponding difference PMI in the differential codebook；

105, the difference PMI at least one the first subband group that base station is transmitted and received to terminal device and at least one second The difference PMI of subband group；

106, the terminal device difference PMI of at least one the first subband group and at least one second subband group based on the received Difference PMI, determine the code word of at least one first subband group and the code word of at least one the second subband group.

In the embodiment of the present application, base station also needs to send the corresponding absolute PMI of code word in broadband.In this way, 106, terminal device Determine the code word of at least one first subband group and the code word of at least one the second subband group, comprising:

Terminal device determines the code word in the broadband according to the absolute PMI in broadband from benchmark code book；

Terminal device determines the corresponding differential codebook of the code word in the broadband；

The difference of terminal device the difference PMI of at least one the first subband group and at least one the second subband group based on the received PMI is divided to determine the code word of at least one first subband group and the code word of at least one the second subband group from the differential codebook.

In a kind of optional embodiment, if differential codebook is as shown in table 5, i.e., differential codebook be code word difference PMI Corresponding relationship between absolute PMI, then step 103-105 can be executed using a step, i.e., base station is directly from broadband The difference PMI of at least one the first subband group and the difference of at least one the second subband group are determined in the corresponding differential codebook of code word PMI.Correspondingly, in step 106, terminal device based on the received the difference PMI of at least one the first subband group and at least one The difference PMI of second subband group determines the code word of at least one first subband group and the code word of at least one the second subband group, It include: the difference of terminal device the difference PMI of at least one the first subband group and at least one the second subband group based on the received PMI, the respectively corresponding differential codebook of the code word from broadband and difference corresponding with the code word of the adjacent subband group of the second subband group In code book, the absolute PMI of at least one the first subband group and the absolute PMI of at least one the second subband group are determined；Then, according to The absolute PMI of at least one the first subband group and absolute PMI of at least one the second subband group is determined at least from benchmark code book The code word of the code word of one the first subband group and at least one the second subband group.

In a kind of optional embodiment, when base station or terminal device determine the code word in broadband corresponding differential codebook, The differential codebook may not necessarily be calculated using above-mentioned optional embodiment, but directly know broadband by way of tabling look-up Code word corresponding to differential codebook, i.e. it is corresponding can to pass through code word each in agreement stipulated standard code book for base station and terminal device Differential codebook, to save the process resource of base station and terminal device.

As it can be seen that embodiment shown in Fig. 2, so that each subband group has corresponding absolute PMI or difference PMI, it is same The pre-coding matrix that subband in a subband group uses is identical, and the pre-coding matrix used between each subband group can be different, So as to improve the anti-interference ability between each subband group, the spectrum efficiency and system performance of system are substantially improved.

Referring to Fig. 4, Fig. 4 is the process signal of another pre-coding matrix instruction method provided by the embodiments of the present application Figure, wherein in pre-coding matrix instruction method shown in Fig. 4, the code word of the first subband group is true from the differential codebook in broadband Fixed, the code word of the second subband group is obtained from the first subband group starting recursion.Specifically, as shown in figure 4, this prelists Code matrix indicating means may comprise steps of:

201, base station determines the code word in broadband according to the channel information in the broadband of measurement from benchmark code book；

202, base station determines the corresponding differential codebook of the code word in broadband；

203, it is directed to each first subband group, base station determines the code word of the first subband group from the differential codebook；

204, it is directed to each second subband group, base station is from difference corresponding with the code word of the adjacent subband group of second subband group The code word of second subband group is determined in demal sheet；

205, base station determines each first son according to the code word of each first subband group and the code word of each second subband group The difference PMI of difference PMI and each second subband group with group.

206, base station sends the difference PMI of at least one first subband group and the difference of at least one the second subband group PMI；

207, the terminal device difference PMI of at least one the first subband group and at least one second subband group based on the received Difference PMI determine the code word of at least one the first subband group and the code word of at least one the second subband group.

In a kind of optional embodiment, it is assumed that broadband includes first subband group, then in step 204, base station is true When the difference PMI of the code word and the code word of fixed second subband group:

1) the second subband group for mark in broadband less than the mark of the first subband group, the code word of second subband group and The difference PMI of the code word is the difference from subband group adjacent with second subband group and bigger than the mark of second subband group It is determined in code book.It is illustrated by taking Fig. 1 b as an example, the code word and difference PMI of the first subband group m is true from the differential codebook in broadband Fixed；The code word and difference PMI of second subband group m-1 is determined from the differential codebook of the first subband group m；Second subband group The code word and difference PMI of m-2 is determined from the differential codebook of the second subband group m-1.

2) it is greater than the second subband group of the mark of first subband group, the code word of second subband group for mark in broadband With the difference that the difference PMI of the code word is from subband group adjacent with second subband group and smaller than the mark of second subband group It is determined in demal sheet.It is illustrated by taking Fig. 1 b as an example, the code word of the second subband group m+2 and the difference PMI of the code word are from adjacent It is determined in the differential codebook of first subband group m；The code word of second subband group m+3 and the difference PMI of the code word are from adjacent It is determined in the differential codebook of second subband group m+2；The code word of second subband group m+4 and the difference PMI of the code word are from adjacent The second subband group m+3 differential codebook in determine.

In another optional embodiment, it is assumed that broadband includes two the first subband groups, two first subband groups Mark be respectively x, y, and x < y, then in step 204, base station determines the code word of the second subband group and the difference PMI of the code word When:

1) it is less than the second subband group of x, the code word of second subband group and the difference PMI of the code word for mark in broadband It is to be determined from the differential codebook of the big subband group of adjacent ratio self identification；By taking Fig. 1 a as an example, x=m, the second subband group m- 1 code word and difference PMI is determined from the differential codebook of the first adjacent subband group m；The code word of second subband group m-2 and Difference PMI is determined from the differential codebook of the second adjacent subband group m-1；

2) it is greater than the second subband group of y, the code word of second subband group and the difference PMI of the code word for mark in broadband It is to be determined from the differential codebook of the small subband group of adjacent ratio self identification；By taking Fig. 1 a as an example, y=m+3, the second subband group m+ 4 code word and difference PMI is determined from the differential codebook of the first adjacent subband group m+3；

3) it is greater than x for mark and is less than the second subband group of y, the code word of second subband group and the difference of the code word PMI is determined from the corresponding differential codebook of code word of the big subband group of adjacent ratio self identification；By taking Fig. 1 a as an example, x= The code word and differential codebook of m, y=m+3, the second subband group m+2 are determined from the differential codebook of the first adjacent subband group m+3 's；The code word and differential codebook of second subband group m+1 is determined from the differential codebook of the first adjacent subband group m+2.

Optionally, in 3), it is greater than x for mark and is less than the second subband group of y, the code word of second subband group and the code The difference PMI of word is determined in the corresponding differential codebook of code word of the small subband group of adjacent ratio self identification；It is with Fig. 1 a Example, x=m, y=m+3, the code word and differential codebook of the second subband group m+1 are from the differential codebook of the first adjacent subband group m Determining；The code word and differential codebook of second subband group m+2 is determined from the differential codebook of the first adjacent subband group m+1 's.

Optionally, in 3), it is greater than x for mark and is less than the second subband group of y, the code word of second subband group and the code The difference PMI of word is that subband group of the mark greater than x but less than (y-x)/2 is the subband group small according to adjacent ratio self identification It is determined in the corresponding differential codebook of code word；Mark is greater than (y-x)/2 and is less than the second subband group of y, second subband group The difference PMI of code word and the code word is determined from the corresponding differential codebook of code word of the big subband group of adjacent ratio self identification 's.That is, being to identify lesser for identifying the second subband group between the mark in two the first subband groups One subband group is starting recursion, or to identify biggish first subband group as starting recursion, can by signaling, in advance about Mode as defined in fixed or agreement determines.

Correspondingly, in 207, the difference PMI of terminal device at least one the first subband group based on the received determines at least one The code word of a first subband group may include: terminal device according to the difference PMI of at least one the first subband group from the difference in broadband The code word of at least one the first subband group is determined in demal sheet；For each second subband group, terminal device is according to second son Difference PMI with group determines the code word of the second subband group from the differential codebook of the subband group adjacent with second subband group.Its In, when terminal device determines the code word of the second subband group, remains and obtained from the first subband group starting recursion, it specifically can be with The difference PMI of the second subband group is referred in above-mentioned example 1), 2) or 1), 2), 3), from corresponding differential code based on the received Code word is determined in this.

In another embodiment, with embodiment shown in Fig. 4 the difference is that, the code word of the first subband group is from base It is selected in quasi- code book, i.e. the PMI of the first subband group is absolute PMI, and the code word of the second subband group is remained from the first subband group To originate using above-mentioned optional embodiment selection, correspondingly, the PMI of the second subband group is difference PMI.

Therefore, pre-coding matrix instruction method used by base station and terminal device can include at least above three and implement Example, therefore, base station need to send instruction information to terminal device, and terminal device can be determined according to the instruction information using which kind of Embodiment obtains the corresponding code word of each subband group.The instruction information can be sent in a manner of downlink signaling, as RRC, MAC-ce or DCI mode is sent.The instruction information can be identified with 2 bits, and such as 00 indicates to use embodiment shown in Fig. 3；01 It indicates to use embodiment shown in Fig. 4；10 indicate that use is described above similar with Fig. 4, but the PMI of the first subband group is absolute The embodiment of PMI.

In conclusion terminal device can obtain respectively the code word of each subband group in up-link, to consider channel Frequency selectivity, be conducive to improve system performance.In addition, using difference in the pre-coding matrix instruction information that base station is sent PMI indicates code word, can greatly reduce signaling overheads.

Wherein, in downlink system, base station can send instruction information, protocol conventions or be signaled to terminal device Mode knows terminal device using pre-coding matrix instruction method described in which embodiment in above three embodiments, To which terminal device can use corresponding mode to base station feedback PMI；Optionally, terminal device can also by itself Measurement result determines and feeds back PMI using pre-coding matrix instruction method described in which embodiment.In addition, downlink system In, broadband can be the broadband that terminal device is obtained by channel measurement, and the code word in the broadband can be according to sometime Or the channel information in preset duration is selected from benchmark code book.In downlink system, terminal device can execute up-link The relevant operation of middle base station, the base station in downlink system can execute the relevant operation of terminal device in up-link, therefore be directed to Pre-coding matrix instruction method in downlink system can refer to above-mentioned related content.And will not be described here in detail.

Referring to Fig. 5, Fig. 5 is a kind of structural schematic diagram of equipment provided by the embodiments of the present application, as shown in figure 5, this sets Standby may include processing unit 301 and communication unit 302, in which:

Processing unit 301, for determine the first subband group of at least one in broadband pre-coding matrix instruction and the width The pre-coding matrix instruction of at least one the second subband group in band；

The pre-coding matrix instruction of first subband group is the absolute pre-coding matrix instruction determined based on benchmark code book, Either indicated based on the differential precoding matrix that differential codebook determines；

The pre-coding matrix instruction of second subband group is the differential precoding matrix instruction determined based on differential codebook；

The differential codebook is to map to obtain from the benchmark code book；

Communication unit 302, for send at least one first subband group pre-coding matrix instruction and it is described at least The pre-coding matrix instruction of one the second subband group.

In a kind of optional embodiment, the pre-coding matrix instruction of first subband group is true based on benchmark code book When fixed absolute pre-coding matrix instruction, the processing unit 301, specifically for selecting described first from the benchmark code book The code word of subband group；And determine that the absolute pre-coding matrix of first subband group refers to based on the code word of first subband group Show.

In a kind of optional embodiment, the pre-coding matrix instruction of first subband group is true based on differential codebook When fixed differential precoding matrix indicates, the processing unit 301, specifically for selecting first subband from differential codebook The code word of group；And determine that the differential precoding matrix of first subband group indicates according to the code word of first subband group；

The differential codebook is to map to obtain by the code word in the broadband, and the code word in the broadband is by the transmitting terminal root It selects to obtain from the benchmark code book according to the channel information in the broadband of measurement.

In a kind of optional embodiment, the pre-coding matrix instruction of second subband group is true based on differential codebook Fixed differential precoding matrix instruction, the processing unit 301 are specifically used for determining differential codebook, the differential codebook by with The adjacent corresponding code word of subband group of second subband group maps to obtain；Second subband is selected from the differential codebook The code word of group, and determine that the differential precoding matrix of second subband group indicates according to the code word of second subband group.

In a kind of optional embodiment, the differential codebook is to map to obtain from the benchmark code book, comprising: The code word that the differential codebook includes is to carry out calculus of differences acquisition to the beam coefficient of target code word in the benchmark code book.

In a kind of optional embodiment, the target code word is the code word in the broadband or is and second son With the adjacent corresponding code word of subband group of group.

In a kind of optional embodiment, the bit number of the differential precoding matrix instruction is 1-4 bit.

In a kind of optional embodiment, the communication unit 302 is also used to send instruction information, the instruction letter It includes that differential precoding matrix indicates that breath, which is used to indicate in the pre-coding matrix instruction information of the transmission of communication unit 302,.

Wherein, each unit shown in fig. 5 can execute transmitting terminal in above-described embodiment in conjunction with above-mentioned various embodiments Relevant operation.

In another optional embodiment, receiving end in above-described embodiment is can also be performed in each unit shown in fig. 5 Relevant operation, such as:

Communication unit 302, for receive at least one the first subband group pre-coding matrix instruction and at least one second The pre-coding matrix instruction of subband group；

Processing unit 301, for according to the pre-coding matrix instruction of at least one first subband group from benchmark code book Or the code word of at least one first subband group is determined in differential codebook；And according at least one second subband group Pre-coding matrix instruction determines the code word of at least one second subband group from differential codebook；

The differential codebook is to map to obtain from the benchmark code book.

The processing unit 301, is also used to determine the code word in broadband from the benchmark code book, and the broadband includes described At least one first subband group and at least one described second subband group；And determine the code word mapped difference in the broadband Code book, using the differential codebook as differential codebook used in the code word for determining at least one first subband group.

For the second subband group of each of at least one second subband group, the processing unit 301 is also used to obtain Take the code word of the subband group adjacent with second subband group；And determine that the code word mapped of the adjacent subband group is poor Demal sheet, using the differential codebook as differential codebook used in the code word for determining second subband group.

For the above embodiment or in embodiment, the related content that receiving end and transmitting terminal can carry out can also be with It is executed by determination unit 301 and communication unit 302, and will not be described here in detail.

According to preceding method, Fig. 6 is the schematic diagram of another equipment provided by the embodiments of the present application, as shown in fig. 6, this sets Standby can be terminal device 10, or chip or circuit, for example may be disposed at the chip or circuit of terminal device.The terminal Equipment 10 can correspond to the relevant operation of the transmitting terminal in the above method, can also execute the relevant operation of receiving end.

The equipment may include processor 110 and memory 120.The memory 120 for storing instruction, the processor 110 for executing the instruction of the memory 120 storage, to realize the step as performed by above-mentioned base station or terminal device.

Further, the equipment can also include, receiver 140 and transmitter 150.Further, which can be with It further comprise bus system 130, wherein processor 110, memory 120, receiver 140 and transmitter 150 can be by total Linear system system 130 is connected.

Processor 110 is used to execute the instruction of the memory 120 storage, receives signal to control and receive device 140, and control The step of transmitter 150 sends signal, completes terminal device in the above method.Wherein, receiver 140 and transmitter 150 can be with For same or different physical entity.When for identical physical entity, transceiver may be collectively referred to as.The memory 220 can To be integrated in the processor 210, can also be provided separately with the processor 210.

As a kind of implementation, the function of receiver 140 and transmitter 150 be can be considered through transmission circuit or receipts The special chip of hair is realized.Processor 110 is it is contemplated that pass through dedicated processes chip, processing circuit, processor or general core Piece is realized.

As another implementation, it may be considered that realize that the embodiment of the present application is provided using the mode of general purpose computer Terminal device.It will realize that processor 110, the program code of 150 function of receiver 140 and transmitter are stored in memory In, general processor realizes processor 110, the function of receiver 140 and transmitter 150 by executing the code in memory Energy.

Concept relevant to technical solution provided by the embodiments of the present application involved in the equipment, explain and detailed description and Other steps refer to the description as described in these contents in preceding method or other embodiments, are not repeated herein.

Fig. 7 is a kind of structural schematic diagram of terminal device provided by the embodiments of the present application.The equipment is applicable to shown in Fig. 2 In system out.For ease of description, Fig. 7 illustrates only the main component of terminal device.As shown in fig. 7, terminal device 10 wraps Include processor, memory, control circuit, antenna and input/output unit.Processor is mainly used for communication protocol and leads to Letter data is handled, and is controlled entire terminal device, and software program, the data of processing software program, example are executed As for supporting terminal device to execute movement described in the indicating means embodiment of above-mentioned transmitting pre-encoding matrix.Memory It is mainly used for storing software program and data, such as benchmark code book or differential codebook described in storage above-described embodiment.Control Circuit processed is mainly used for the conversion of baseband signal and radiofrequency signal and the processing to radiofrequency signal.Control circuit and antenna are together Transceiver can also be called, be mainly used for the radiofrequency signal of transceiving electromagnetic waveshape.Input/output unit, for example, it is touch screen, aobvious Display screen, keyboard etc. are mainly used for receiving the data of user's input and to user's output data.

After terminal device booting, processor can read the software program in storage unit, explain and execute software journey The instruction of sequence, the data of processing software program.When needing through wireless transmission data, processor is carried out to sent data After Base-Band Processing, for output baseband signal to radio circuit, radio circuit carries out radiofrequency signal baseband signal after radio frequency processing It is sent out in the form of an electromagnetic wave by antenna.When there is data to be sent to terminal device, radio circuit is received by antenna To radiofrequency signal, radiofrequency signal is converted into baseband signal, and baseband signal is exported to processor, processor is by baseband signal It is converted to data and the data is handled.

It will be understood by those skilled in the art that for ease of description, Fig. 7 illustrates only a memory and processor.In In actual terminal device, may exist multiple processors and memory.Memory is referred to as storage medium or storage Equipment etc., the embodiment of the present invention is without limitation.

As a kind of optional implementation, processor may include baseband processor and central processing unit, Base-Band Processing Device is mainly used for handling communication protocol and communication data, and central processing unit is mainly used for carrying out entire terminal device Control executes software program, the data of processing software program.Processor in Fig. 7 is integrated with baseband processor and central processing The function of device, it will be understood by those skilled in the art that baseband processor and central processing unit are also possible to processing independent Device is interconnected by technologies such as buses.It will be understood by those skilled in the art that terminal device may include multiple baseband processor with Different network formats are adapted to, terminal device may include multiple central processing units to enhance its processing capacity, terminal device All parts can be connected by various buses.The baseband processor can also be expressed as at baseband processing circuitry or base band Manage chip.The central processing unit can also be expressed as central processing circuit or central processing element.To communication protocol and The function that communication data is handled can it is built-in in the processor, storage unit can also be stored in form of software programs In, software program is executed to realize Base-Band Processing function by processor.

Illustratively, in inventive embodiments, can by with transmission-receiving function antenna and control circuit be considered as terminal and set Processor with processing function, is considered as the determination unit or processing of terminal device 10 by standby 10 communication unit or Transmit-Receive Unit Unit.As shown in fig. 7, terminal device 10 includes Transmit-Receive Unit 101 and processing unit 102.Transmit-Receive Unit is referred to as receiving and dispatching Device, transceiver, R-T unit etc..Optionally, the device in Transmit-Receive Unit 101 for realizing receive capabilities can be considered as reception Device in Transmit-Receive Unit 101 for realizing sending function is considered as transmission unit by unit, i.e. Transmit-Receive Unit 101 includes receiving Unit and transmission unit are illustrative, and receiving unit is referred to as receiver, receiver, receives circuit etc., and transmission unit can With referred to as transmitter, transmitter or transmit circuit etc..

According to preceding method, Fig. 8 is the structural schematic diagram of another equipment provided by the embodiments of the present application, as shown in figure 8, should Equipment can be the network equipment 20, or chip or circuit such as may be disposed at chip or circuit in the network equipment.The net Network equipment 20 executes the transmitting terminal in the above method and/or the relevant operation of receiving end.The equipment may include 210 He of processor Memory 220.For storing instruction, which is used to execute the instruction of the memory 220 storage to the memory 220, with The equipment is set to realize the relevant operation of aforementioned transmitting terminal or receiving end.

Further, which can also include receiver 240 and transmitter 250.Further, which can be with Including bus system 230.

Wherein, processor 210, memory 220, receiver 240 and transmitter 250 are connected by bus system 230, are handled Device 210 is used to execute the instruction of the memory 220 storage, receives signal to control and receive device 240, and control the hair of transmitter 250 The number of delivering letters, complete the above method in the network equipment the step of.Wherein, receiver 240 and transmitter 250 can be identical or not Same physical entity.When for identical physical entity, transceiver may be collectively referred to as.The memory 220 can integrate described In processor 210, it can also be provided separately with the processor 210.

As a kind of implementation, the function of receiver 240 and transmitter 250 be can be considered through transmission circuit or receipts The special chip of hair is realized.Processor 210 is it is contemplated that pass through dedicated processes chip, processing circuit, processor or general core Piece is realized.

As another implementation, it may be considered that realize that the embodiment of the present application is provided using the mode of general purpose computer The network equipment.It will realize that processor 210, the program code of 250 function of receiver 240 and transmitter are stored in memory In, general processor realizes processor 210, the function of receiver 240 and transmitter 250 by executing the code in memory Energy.

Concept relevant to technical solution provided by the embodiments of the present application involved in the equipment is explained and is described in detail And other steps refer to the description as described in these contents in preceding method or other embodiments, are not repeated herein.

According to preceding method, Fig. 9 is a kind of structural schematic diagram of the network equipment provided by the embodiments of the present application, such as can be The structural schematic diagram of base station.As shown in figure 9, the base station can be applied in system as shown in Figure 2.Base station 20 includes one or more A radio frequency unit, such as remote radio unit (RRU) (remote radio unit, RRU) 201 and one or more Base Band Unit (baseband unit, BBU) (alternatively referred to as digital units, digital unit, DU) 202.The RRU201 is properly termed as receiving Bill member, transceiver, transmission circuit or transceiver etc. may include at least one antenna 2011 and radio frequency unit 2012.The part the RRU201 is mainly used for the transmitting-receiving of radiofrequency signal and the conversion of radiofrequency signal and baseband signal, such as with In sending signaling message described in above-described embodiment to terminal device.The part BBU202 is mainly used for carrying out at base band Reason, the base station such as controls.The RRU201 and BBU202, which can be, to be physically located at together, can also be physically separated It is arranged, i.e. distributed base station.

The BBU202 is the control centre of base station, is referred to as processing unit, is mainly used for completing Base-Band Processing function Can, such as channel coding is multiplexed, modulation, spread spectrum etc..Such as the BBU (processing unit) can be used for control base station and execute State the operating process in embodiment of the method about the network equipment.

In one example, the BBU202 can be made of one or more veneers, and multiple veneers can be supported jointly The wireless access network (such as LTE net) of single access standard can also support the wireless access network of different access standards respectively.It is described BBU202 further includes memory 2021 and processor 2022.The memory 2021 is to store necessary instruction and data.Example Such as memory 2021 stores presupposed information, code book in above-described embodiment.The processor 2022 is carried out for control base station Necessary operation, such as the operating process in above method embodiment about the network equipment is executed for control base station.It is described to deposit Reservoir 2021 and processor 2022 can serve one or more veneers.That is, can be separately provided on each veneer Memory and processor.It is also possible to multiple veneers and shares identical memory and processor.It furthermore can be on each veneer It is provided with necessary circuit.

According to method provided by the embodiments of the present application, the embodiment of the present application also provides a kind of communication system comprising aforementioned The network equipment and one or more than one terminal device.

It should be understood that in the embodiment of the present application, processor can be central processing unit (Central Processing Unit, referred to as " CPU "), which can also be other general processors, digital signal processor (DSP), dedicated integrated Circuit (ASIC), ready-made programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic Device, discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional place Manage device etc..

The memory may include read-only memory and random access memory, and provide instruction and data to processor. The a part of of memory can also include nonvolatile RAM.

The bus system can also include that power bus, control bus and status signal are total in addition to including data/address bus Line etc..But for the sake of clear explanation, various buses are all designated as bus system in figure.

During realization, each step of the above method can by the integrated logic circuit of the hardware in processor or The instruction of software form is completed.The step of method in conjunction with disclosed in the embodiment of the present application, can be embodied directly in hardware processor Execute completion, or in processor hardware and software module combination execute completion.Software module can be located at random storage Device, flash memory, read-only memory, this fields such as programmable read only memory or electrically erasable programmable memory, register at In ripe storage medium.The storage medium is located at memory, and processor reads the information in memory, completes in conjunction with its hardware The step of stating method.To avoid repeating, it is not detailed herein.

It should also be understood that first, second, third, fourth and the various digital numbers that are referred to herein are only for convenience of description The differentiation of progress is not intended to limit the invention the range of embodiment.

It should be understood that the terms "and/or", only a kind of incidence relation for describing affiliated partner, expression can deposit In three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B. In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".

It should be understood that magnitude of the sequence numbers of the above procedures are not meant to execute suitable in the various embodiments of the application Sequence it is successive, the execution of each process sequence should be determined by its function and internal logic, the implementation without coping with the embodiment of the present invention Process constitutes any restriction.

Those of ordinary skill in the art may be aware that described in conjunction with the examples disclosed in this document various illustrative Logical block (illustrative logical block) and step (step), can be with electronic hardware or computer software Combination with electronic hardware is realized.These functions are implemented in hardware or software actually, depending on technical solution Specific application and design constraint.Professional technician can to each specific application come using distinct methods to realize The function of description, but such implementation should not be considered as beyond the scope of the present invention.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.

In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit It closes or communicates to connect, can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme 's.

It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.

In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real It is existing.When implemented in software, it can entirely or partly realize in the form of a computer program product.The computer program Product includes one or more computer instructions.When loading on computers and executing the computer program instructions, all or It partly generates according to process or function described in the embodiment of the present invention.The computer can be general purpose computer, dedicated meter Calculation machine, computer network or other programmable devices.The computer instruction can store in computer readable storage medium In, or from a computer readable storage medium to the transmission of another computer readable storage medium, for example, the computer Instruction can pass through wired (such as coaxial cable, optical fiber, number from a web-site, computer, server or data center User's line (DSL)) or wireless (such as infrared, wireless, microwave etc.) mode to another web-site, computer, server or Data center is transmitted.The computer readable storage medium can be any usable medium that computer can access or It is comprising data storage devices such as one or more usable mediums integrated server, data centers.The usable medium can be with It is magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk Solid State Disk (SSD)) etc..

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims

1. a kind of pre-coding matrix instruction method characterized by comprising

Transmitting terminal determines at least one in the pre-coding matrix instruction and the broadband of the first subband group of at least one in broadband The pre-coding matrix instruction of two subband groups；

The pre-coding matrix instruction of first subband group is the absolute pre-coding matrix instruction determined based on benchmark code book, or It is the differential precoding matrix instruction determined based on differential codebook；

The differential codebook is to map to obtain from the benchmark code book；

The pre-coding matrix instruction of transmitting terminal transmission at least one first subband group and at least one described second son Pre-coding matrix instruction with group.

2. pre-coding matrix instruction method as described in claim 1, which is characterized in that the precoding square of first subband group Battle array instruction is the absolute pre-coding matrix instruction determined based on benchmark code book, comprising:

The transmitting terminal selects the code word of first subband group from the benchmark code book；

The transmitting terminal determines the absolute pre-coding matrix instruction of first subband group based on the code word of first subband group.

3. pre-coding matrix instruction method as described in claim 1, which is characterized in that the precoding square of first subband group Battle array instruction is the differential precoding matrix instruction determined based on differential codebook, comprising:

The transmitting terminal selects the code word of first subband group from differential codebook；

The transmitting terminal determines that the differential precoding matrix of first subband group indicates according to the code word of first subband group；

The differential codebook is mapped by the code word in the broadband, the code word in the broadband be by the transmitting terminal according to What the channel information in the broadband of measurement selected to obtain from the benchmark code book.

4. pre-coding matrix instruction method as described in claim 1, which is characterized in that it is characterized in that, first subband The pre-coding matrix instruction of group is the differential precoding matrix instruction determined based on differential codebook, comprising:

The transmitting terminal determines the differential precoding matrix instruction of first subband group, the differential codebook from differential codebook It is to be mapped by the code word in the broadband, the code word in the broadband is the broadband by the transmitting terminal according to measurement What channel information selected to obtain from the benchmark code book.

5. pre-coding matrix instruction method as described in claim 1, which is characterized in that the precoding square of second subband group Battle array instruction is the differential precoding matrix instruction determined based on differential codebook, comprising:

The transmitting terminal determines differential codebook, and the differential codebook is by code corresponding with the adjacent subband group of second subband group Word maps to obtain；

The transmitting terminal selects the code word of second subband group from the differential codebook, and according to second subband group Code word determines the differential precoding matrix instruction of second subband group.

6. pre-coding matrix instruction method as described in claim 1, which is characterized in that the precoding square of second subband group Battle array instruction is the differential precoding matrix instruction determined based on differential codebook, comprising:

The transmitting terminal determines the differential precoding matrix instruction of second subband group, the differential codebook from differential codebook It is to be mapped by code word corresponding with the adjacent subband group of second subband group.

7. pre-coding matrix instruction method as described in claim 1, which is characterized in that first subband group is predefined , it is reported after the measurement of perhaps notified by downlink signaling or channel by uplink signaling.

8. pre-coding matrix instruction method as described in claim 1, which is characterized in that the differential codebook is from the benchmark Mapping obtains in code book, comprising: the code word that the differential codebook includes is to meet preset rules from the benchmark code book It is selected in code word.

9. pre-coding matrix instruction method as claimed in claim 8, which is characterized in that the code word for meeting preset rules is Code word of the distance between the target code word in pre-determined distance, or correlation between target code word meet preset condition Code word.

10. pre-coding matrix instruction method according to claim 1, which is characterized in that the differential codebook is from described Mapping obtains in benchmark code book, comprising: the code word that the differential codebook includes is to target code word in the benchmark code book Beam coefficient carries out calculus of differences acquisition.

11. the pre-coding matrix instruction method as described in claim 9 or 10, which is characterized in that the target code word is described The code word in broadband or code word for the subband group adjacent with second subband group.

12. pre-coding matrix instruction method according to any one of claims 1 to 9, which is characterized in that the differential codebook The absolute precoding square of the differential precoding matrix instruction for each code word for including and each code word after ascending or descending order arrangement Battle array instruction is corresponding.

13. such as the described in any item pre-coding matrix instruction methods of claim 1 to 12, which is characterized in that the difference prelists The bit number of code matrix instruction is 1-4 bit.

14. according to claim 1 to 11 described in any item pre-coding matrix instruction methods, which is characterized in that the method is also Include:

The transmitting terminal sends instruction information, and the instruction information is used to indicate the pre-coding matrix instruction that the transmitting terminal is sent It include that differential precoding matrix indicates in information.

15. a kind of pre-coding matrix instruction method characterized by comprising

Receiving end receives the pre-coding matrix instruction of at least one the first subband group and the precoding of at least one the second subband group Matrix instruction；

The receiving end is determined from benchmark code book according to the absolute pre-coding matrix instruction of at least one first subband group The code word of at least one first subband group, or referred to according to the differential precoding matrix of at least one first subband group Show the code word that at least one first subband group is determined from differential codebook；And according at least one described second subband group Differential precoding matrix indicate the code word that at least one second subband group is determined from differential codebook；

The differential codebook is to map to obtain from the benchmark code book.

16. pre-coding matrix instruction method as claimed in claim 15, which is characterized in that the method also includes:

The receiving end determines the code word in broadband from the benchmark code book, and the broadband includes at least one described first subband Group and at least one described second subband group；

The receiving end determines the code word mapped differential codebook in the broadband, described extremely using the differential codebook as determination Differential codebook used in the code word of few first subband group.

17. according to the method for claim 15, which is characterized in that for each of at least one described second subband group Second subband group, the method also includes:

The receiving end obtains the code word of the subband group adjacent with second subband group；

The receiving end determines the code word mapped differential codebook of the adjacent subband group, using the differential codebook as really Differential codebook used in the code word of fixed second subband group.

18. a kind of equipment characterized by comprising

Processing unit, in the pre-coding matrix instruction and the broadband for determining the first subband group of at least one in broadband at least The pre-coding matrix instruction of one the second subband group；

The differential codebook is to map to obtain from the benchmark code book；

Communication unit, for send at least one first subband group pre-coding matrix instruction and it is described at least one second The pre-coding matrix instruction of subband group.

19. equipment as claimed in claim 18, which is characterized in that the pre-coding matrix instruction of first subband group is to be based on When the absolute pre-coding matrix instruction that benchmark code book determines, the processing unit, specifically for being selected from the benchmark code book The code word of first subband group；And absolutely prelisting for first subband group is determined based on the code word of first subband group Code matrix instruction.

20. equipment as claimed in claim 18, which is characterized in that the pre-coding matrix instruction of first subband group is to be based on When the differential precoding matrix instruction that differential codebook determines, the processing unit is specifically used for from differential codebook described in selection The code word of first subband group；And the difference precoding square of first subband group is determined according to the code word of first subband group Battle array instruction；

The differential codebook is to map to obtain by the code word in the broadband, and the code word in the broadband is by the transmitting terminal according to survey What the channel information in the broadband of amount selected to obtain from the benchmark code book.

21. equipment as claimed in claim 18, which is characterized in that the pre-coding matrix instruction of first subband group is to be based on When the differential precoding matrix instruction that differential codebook determines, the processing unit, described in being determined from differential codebook The differential precoding matrix of first subband group indicates；

22. equipment as claimed in claim 18, which is characterized in that the pre-coding matrix instruction of second subband group is to be based on When the differential precoding matrix instruction that differential codebook determines, the processing unit is specifically used for determining differential codebook, the difference Code book is mapped to obtain by code word corresponding with the adjacent subband group of second subband group；From the differential codebook described in selection The code word of second subband group, and determine according to the code word of second subband group difference precoding square of second subband group Battle array instruction.

23. equipment as claimed in claim 18, which is characterized in that the pre-coding matrix instruction of second subband group is to be based on When the differential precoding matrix instruction that differential codebook determines, the processing unit, described in being determined from differential codebook The differential precoding matrix of second subband group indicates；

The differential codebook is to map to obtain by code word corresponding with the adjacent subband group of second subband group.

24. equipment as claimed in claim 18, which is characterized in that first subband group is predefined, or by downlink It is reported after the measurement of signaling is notified or channel by uplink signaling.

25. equipment as claimed in claim 18, which is characterized in that the differential codebook is mapped from the benchmark code book It arrives, comprising: the code word that the differential codebook includes is selected from the code word for meeting preset rules in the benchmark code book.

26. equipment as claimed in claim 25, which is characterized in that the code word for meeting preset rules be with target code word it Between code word of the distance in pre-determined distance, or correlation between target code word meets the code word of preset condition.

27. equipment according to claim 18, which is characterized in that the differential codebook is mapped from the benchmark code book It obtains, comprising: the code word that the differential codebook includes is poor to the beam coefficient progress of target code word in the benchmark code book Partite transport calculates acquisition.

28. the equipment as described in claim 26 or 27, which is characterized in that the target code word be the broadband code word or For the code word of the subband group adjacent with second subband group.

29. 8 to 28 described in any item equipment according to claim 1, which is characterized in that each code word that the differential codebook includes Differential precoding matrix instruction with ascending or descending order arrange after the absolute pre-coding matrix instruction of each code word it is corresponding.

30. such as the described in any item equipment of claim 18 to 29, which is characterized in that the ratio of the differential precoding matrix instruction Special number is 1-4 bit.

31. 8 to 28 described in any item equipment according to claim 1, which is characterized in that

The communication unit, is also used to send instruction information, and the instruction information is used to indicate in pre-coding matrix instruction information It is indicated including differential precoding matrix.

32. a kind of equipment characterized by comprising

Communication unit, for receiving the pre-coding matrix instruction and at least one the second subband group of at least one the first subband group Pre-coding matrix instruction；

Processing unit, for according to the pre-coding matrix instruction of at least one first subband group from benchmark code book or differential code The code word of at least one first subband group is determined in this；And the precoding square according at least one second subband group Battle array instruction determines the code word of at least one second subband group from differential codebook；

The differential codebook is to map to obtain from the benchmark code book.

33. equipment as claimed in claim 32, which is characterized in that

The processing unit, is also used to determine the code word in broadband from the benchmark code book, and the broadband includes described at least one A first subband group and at least one described second subband group；And determine the code word mapped differential codebook in the broadband, Using the differential codebook as differential codebook used in the code word for determining at least one first subband group.

34. equipment according to claim 32, which is characterized in that for each of at least one described second subband group Second subband group, the processing unit are also used to obtain the code word of the subband group adjacent with second subband group；And it determines The code word mapped differential codebook of the adjacent subband group, using the differential codebook as determining second subband group Differential codebook used in code word.