CN108809384B - Method and device for wireless communication in base station and user equipment - Google Patents

Method and device for wireless communication in base station and user equipment Download PDF

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Publication number
CN108809384B
CN108809384B CN201710286712.8A CN201710286712A CN108809384B CN 108809384 B CN108809384 B CN 108809384B CN 201710286712 A CN201710286712 A CN 201710286712A CN 108809384 B CN108809384 B CN 108809384B
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vectors
pool
time units
type
parameters
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CN108809384A (en
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张晓博
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Shanghai Langbo Communication Technology Co Ltd
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Shanghai Langbo Communication Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity

Abstract

A method and an apparatus for a wireless communication system in a base station, a user equipment. Specifically, first channel information is sent on time units in a first time unit pool; transmitting second channel information on time units in a second pool of time units; the first channel information is used for determining a first vector set, the second channel information is used for determining a first parameter set, the first vector set is used for generating the first parameter set, the first parameter set and the first vector set are used for generating a second vector set, the first vector set is composed of K first-class vectors, the second vector set is composed of K second-class vectors, the K second-class vectors are in one-to-one correspondence with the K first-class vectors, and the second time unit pool comprises a larger number of time units than the first time unit pool. The feedback efficiency in the multi-antenna transmission system is improved.

Description

Method and device for wireless communication in base station and user equipment
Technical Field
The present application relates to a transmission scheme of wireless signals in a wireless communication system, and more particularly, to a method and apparatus for multi-antenna transmission.
Background
Large-scale (Massive) MIMO (Multi-Input Multi-Output) is a research hotspot for next-generation mobile communication. The channel direction between a base station and a UE (User Equipment) is closely related to the vector set used by the base station for MIMO precoding the UE.
In an fdd (frequency Division duplex) system, a base station determines a vector group for SU-MIMO (Single-User MIMO) or MU-MIMO (Multiple-User MIMO) through channel direction feedback of a downlink channel by a UE.
In an existing LTE (Long Term Evolution) system, a UE (User Equipment) measures a CSI-RS (Channel State Information Reference Signal) sent by a base station and respectively feeds back a code word index of a wideband and a code word index of a narrowband, and the code word index of the wideband and the code word indexes of the narrowbands are used by the base station to determine a vector group on the narrowband.
In the 3GPP new air interface discussion, companies propose to feed back a plurality of wideband vector groups and then use narrowband parameters to perform linear combination to obtain narrowband vectors. Further, companies propose that a plurality of wideband vector sets can be combined with the fed-back wideband twiddle factor to obtain a rotated wideband vector set.
Disclosure of Invention
The application discloses a method in user equipment for wireless communication, comprising:
-transmitting first channel information on time units in a first pool of time units;
-transmitting second channel information on time units in a second pool of time units;
the first channel information is used to determine a first set of vectors, the second channel information is used to determine a first set of parameters, the first set of vectors is used to generate the first set of parameters, the first set of parameters and the first set of vectors are used to generate a second set of vectors, the first set of vectors is composed of K first type vectors, the second set of vectors is composed of K second type vectors, the K second type vectors are in one-to-one correspondence with the K first type vectors, the second pool of time units includes a number of time units greater than a number of time units included in the first pool of time units, and K is a positive integer.
As an example, the inventors found through research that a wideband rotation factor or a local wideband over-sampling factor can be used to increase the accuracy of feedback for determining a wideband precoding group, and how to balance the additional feedback overhead caused thereby, improve the potential feedback accuracy gain, and how to combine the wideband rotation factor and the local over-sampling factor to further increase the accuracy of channel direction feedback is a problem to be solved. The present application provides a solution to the above problems. It should be noted that the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict. For example, embodiments and features in embodiments in the base station of the present application may be applied in the user equipment and vice versa.
As an embodiment, the above method has a benefit that increasing the feedback frequency of the parameter can help to increase the change frequency of the vector group while controlling the feedback overhead, thereby reflecting the change of the channel in time.
As one embodiment, the first set of vectors is generated based on channel measurements of a first wireless signal and the second set of vectors is generated based on channel measurements of the first wireless signal and a second wireless signal.
As one embodiment, the first wireless signal and the second wireless signal are reference signals for channel measurement.
As one embodiment, at least one of the first wireless signal, the second wireless signal is CSI-rs (channel State Information Reference signal).
As one example, at least one of the first wireless Signal and the second wireless Signal is SS (Synchronization Signal).
As one embodiment, the first wireless signal is cell specific.
As an embodiment, the first radio signal is user equipment specific (UE specific).
As an embodiment, the second wireless signal is cell specific.
As an embodiment, the second wireless signal is user equipment specific (UE specific).
As one embodiment, the time unit is a time slot.
As one embodiment, the time unit is a subframe.
As one embodiment, the time unit is a frame.
As an embodiment, the Time unit is TTI (Transmission Time Interval).
As an embodiment, the time unit is composed of P consecutive OFDM (Orthogonal frequency division Multiplexing) symbols, and P is a positive integer.
As one example, P is equal to one of {1, 6, 7, 14 }.
As an embodiment, the time unit is composed of P consecutive DFT-S-OFDM (discrete fourier transform Spread OFDM, discrete fourier Spread orthogonal frequency division multiplexing) symbols.
As an embodiment, the first channel information explicitly indicates the K first class vectors.
As an embodiment, the first channel information implicitly indicates the K first class vectors.
As an embodiment, the second channel information explicitly indicates the first set of parameters.
As one embodiment, the second channel information implicitly indicates the first set of parameters.
As an embodiment, the vector is a vector for MIMO precoding.
As an embodiment, the vector is a vector for determining a downlink MIMO channel direction.
As an embodiment, the first set of parameters comprises only one parameter.
As one embodiment, the first set of parameters includes a plurality of parameters.
As an embodiment, the first set of parameters comprises rotation factors in a vertical direction and a horizontal direction.
As an embodiment, the first set of parameters comprises twiddle factors in different polarization directions.
As one embodiment, one parameter in the first set of parameters corresponds to K1 vectors of the second class in the second set of vectors, the K1 being greater than 1 and not greater than K.
As an embodiment, one parameter in the first set of parameters corresponds to K second class vectors in the second set of vectors.
As an embodiment, K parameters in the first parameter set correspond to K second-class vectors in the second vector set in a one-to-one manner.
As an embodiment, the channel measurement refers to estimation of a downlink channel direction.
As an embodiment, the channel measurement refers to an estimation of a channel state including a channel quality and a channel direction.
For one embodiment, the channel measurements include measurements of interference.
As an embodiment, the first-type vectors and the second-type vectors have the same dimension.
For one embodiment, the modulus values of the first-type vector and the second-type vector are the same.
For one embodiment, the first vector codebook consists of L1 vectors of the first type. The first set of vectors is K first-type vectors of the L1 first-type vectors.
As one embodiment, channel measurements based on the first wireless signal are used to select K vectors of a first type in the first vector codebook to form the first vector set.
As one embodiment, the first vector codebook is used to quantize a channel direction estimate based on the first wireless signal.
As an embodiment, the first vector set is K first-type vectors of the L1 first-type vectors that have the smallest included angle with the channel direction estimate.
As an embodiment, the first vector codebook is used for quantizing a precoding matrix recommended by the user equipment based on channel direction estimation of the first wireless signal.
As an embodiment, the first vector set is K first-type vectors of the L1 first-type vectors, which are assumed to be used as precoding vectors and can obtain the highest received SNR (Signal-to-Noise Ratio) by single-user MIMO based on the channel direction estimation of the first wireless Signal.
As an embodiment, the second vector codebook consists of L2 second-class vectors. The second set of vectors are K second-class vectors of the L2 second-class vectors. The L2 is a positive integer greater than the L1.
As an embodiment, channel measurements based on the second wireless signal are used to select K second type vectors in a second vector codebook to constitute the second vector set.
As one embodiment, the vectors in the second vector codebook comprise vectors in the first vector codebook.
As one embodiment, the second vector codebook is used to quantize a channel direction estimate based on the second wireless signal.
As an embodiment, the second vector codebook is used for quantizing a precoding matrix recommended by the user equipment based on the channel direction estimation of the second wireless signal.
As an embodiment, the first vector is a first vector in the first vector codebook, and the second vector group is P1 second vectors of the first vector in the second vector codebook. The P1 is a positive integer greater than 1.
As one example, the L2 is the product of the L1 and the P1.
As an embodiment, K first-type vectors in the first vector set respectively correspond to K second-type vector groups in the second vector codebook. One of the second-class vector groups consists of P1 second-class vectors. And the K second-class vectors in the second vector set respectively belong to the K second-class vector groups.
As an embodiment, the first set of parameters consists of K sets of parameters, which are respectively used to determine the indices of K second-type vectors of the second set of vectors in the second-type vector groups to which they respectively belong.
As an embodiment, the first set of parameters comprises indices of K vectors of the second set of vectors in the group of vectors of the second type to which each belongs.
As a sub-implementation of the above embodiment, the index of K second-type vectors of the second set of vectors in the second-type vector group to which they respectively belong and the first set of vectors are used by the receiver of the second channel information to generate the second set of vectors.
As an embodiment, the first vector is one of the first vector set, the second vector is a second vector of the second vector set corresponding to the first vector, and the first candidate vector group is a second vector group of the K second vector groups corresponding to the first vector.
As an embodiment, the second vector is a second vector in the first candidate vector group that has a smallest angle with the channel direction estimation based on the second wireless signal.
As an embodiment, the second vector is the second vector of the first candidate vector group assumed to be used as a precoding vector and having the highest received SNR (Signal-to-noise ratio) that can be obtained by performing single-user MIMO based on the estimated channel of the second wireless Signal.
As an embodiment, the indices of the K second-type vectors of the second set of vectors in the second-type vector group to which each belongs are all equal to a first index value, one parameter of the first set of parameters being used for determining the first index value.
As a sub-implementation of the above embodiment, the first index value and the first set of vectors are used by a receiver of the second channel information to generate the second set of vectors.
For one embodiment, the first set of parameters includes the first index value.
As an embodiment, the first vector is the first type of vector with the smallest angle between the first set of vectors and the channel direction estimate based on the second wireless signal, and the first index value is equal to the index value of the second vector in the first candidate vector group.
As an embodiment, the first vector is the first type of vector in the first vector set, which is assumed to be used as a precoding vector and can obtain the highest received SNR based on single-user MIMO of the estimated channel of the second wireless signal, and the first index value is equal to the index value of the second vector in the first candidate vector set.
As an embodiment, the first-type vector and the second-type vector are DFT (Discrete fourier transform) vectors.
As an embodiment, the minimum angle between two vectors of the first type is larger than the minimum angle between two vectors of the second type.
As an embodiment, an included angle between any two second-class vectors in the first candidate vector group is smaller than an included angle between any two first-class vectors.
As an embodiment, the first vector is a DFT vector generated based on a first phase factor, the second vector is a DFT vector generated based on a second phase factor, and the first set of parameters includes a rotation factor of the second vector with respect to the first vector. The rotation factor is a difference of the first phase factor and the second phase factor.
As an embodiment, the first vector is a Kronecker Product obtained by performing Kronecker multiplication (Kronecker Product) on a first horizontal vector and a first vertical vector, and the second vector is a Kronecker Product obtained by performing Kronecker multiplication on a second horizontal vector and a second vertical vector. { the first horizontal vector, the first vertical vector, the second horizontal vector, the second vertical vector } are all DFT vectors. { first horizontal phase factor, first vertical phase factor, second horizontal phase factor, second vertical phase factor } are phase factors used to generate { the first horizontal vector, the first vertical vector, the second horizontal vector, the second vertical vector } respectively. The first set of parameters includes a first horizontal rotation factor and a first vertical rotation factor. The first horizontal rotation factor is a difference between the first horizontal phase factor and a second horizontal phase factor. The first vertical rotation factor is a difference between the first vertical phase factor and the second vertical phase factor.
As one embodiment, the first set of vectors and the second set of vectors are based on channel measurements for wideband channels of the first wireless signal and the second wireless signal, respectively. The first channel information and the second channel information are wideband channel information.
As an embodiment, a wideband consists of a plurality of subbands on a frequency resource.
As an embodiment, one wideband channel information is used in combination with multiple sub-band channel information for precoding and user scheduling for multiple sub-bands.
As an embodiment, the number of time units in the second time unit pool is N times the number of time units in the first time unit pool, and N is a positive integer greater than 1.
As an embodiment, the information of multiple sub-band channels obtained by performing channel measurement on the sub-band channel of the second wireless signal is sent on the time unit in the second time unit pool.
As one embodiment, the first time cell pool is a sub-pool of the second time cell pool. The second pool of time cells includes all time cells in the first pool of time cells.
As an embodiment, the L1 first-type vectors in the first vector codebook are orthogonal two by two.
As an embodiment, the L2 second-type vectors in the second vector codebook are orthogonal two by two.
As an embodiment, there are two second-class vectors of the L2 second-class vectors in the second vector codebook that are not orthogonal.
According to an aspect of the application, where K is greater than 1, any one of the first set of parameters is associated with K first type vectors of the first set of vectors.
As an example, the benefit of the above approach is to save feedback overhead.
As an embodiment, the K first-type vectors in the first vector set respectively correspond to the K second-type vector groups. One of the second-class vector groups includes P1 second-class vectors. The P1 is a positive integer greater than 1. The K second-class vectors in the second vector set are respectively one second-class vector in the K second-class vector groups. The index values of the K second-class vectors in the second vector set in the second-class vector group to which the vectors belong are the same and equal to the first index value. The first set of parameters includes the first index value.
As a sub-implementation of the above embodiment, the receiver of the first channel information generates the second set of vectors using the first index value and the first set of vectors.
As an embodiment, K first-type phase factors are respectively used to generate K first-type vectors in the first vector set, and K second-type phase factors are respectively used to generate K second-type vectors in the second vector set. The K first-type phase factors correspond to the K second-type phase factors one by one. The difference value of any one of the K first-class phase factors and the corresponding second-class phase factor of the K second-class phase factors is equal to a first rotation factor. The first set of parameters includes the first twiddle factor.
As a sub-implementation of the above embodiment, the receiver of the first channel information generates the second set of vectors using the first twiddle factor and the first set of vectors.
As an embodiment, K1 first-type horizontal phase factors and K2 first-type vertical phase factors are used to generate K first-type vectors of the first set of vectors, and K1 second-type horizontal phase factors and K2 second-type vertical phase factors are used to generate K second-type vectors of the second set of vectors. The K1 horizontal phase factors of the first type and the K1 horizontal phase factors of the second type are in one-to-one correspondence. The K2 first-type vertical phase factors and the K2 second-type vertical phase factors are in one-to-one correspondence. The difference value between any one of the K first-type horizontal phase factors and the corresponding second-type horizontal phase factor of the K second-type horizontal phase factors is equal to a first horizontal rotation factor. The difference between any one of the K first-type vertical phase factors and the second-type vertical phase factor of the K second-type vertical phase factors corresponding thereto is equal to a first vertical rotation factor. The first set of parameters includes the first horizontal rotation factor and the first vertical rotation factor.
As a sub-implementation of the above-described embodiment, the receiver of the first channel information generates the second set of vectors using the first horizontal twiddle factor, the first vertical twiddle factor, and the first set of vectors.
According to one aspect of the application, the method comprises the following steps:
-transmitting third channel information on time units in a third pool of time units;
the K is greater than 1, the third channel information is used to determine a second set of parameters, the first set of vectors is used to generate the second set of parameters, the second set of parameters and the first set of vectors are used to generate a third set of vectors, the second set of parameters is composed of K first type parameter sets, the K first type parameter sets are in one-to-one correspondence with the K first type vectors in the first set of vectors, the third set of vectors is composed of K third type vectors, the K third type vectors are in one-to-one correspondence with the K first type vectors in the first set of vectors, and the second pool of time units includes time units that are not in the third pool of time units.
As an example, the benefit of the above method is to improve the accuracy of the feedback.
As an embodiment, the third wireless signal is a reference signal for channel measurement.
As an example, the third wireless signal is cell specific.
As an embodiment, the third wireless signal is user equipment specific (UE specific).
As one embodiment, the third wireless signal is a CSI-rs (channel State information reference signal).
As an example, the third wireless Signal is SS (Synchronization Signal).
For one embodiment, the third channel information explicitly indicates the second set of parameters.
As an embodiment, the third channel information implicitly indicates the second set of parameters.
As an embodiment one of said sets of first type parameters comprises only one parameter.
As an embodiment, one of said first type parameter sets comprises a plurality of parameters.
As an embodiment, the third class of vectors are DFT vectors.
As an example, the third type vector is a kronecker product of two DFT vectors.
As an embodiment, the first-type vector and the third-type vector have the same dimension.
As an embodiment, the modulus values of the first type vector and the third type vector are the same.
As an embodiment, the third codebook of vectors consists of L3 third class vectors. The third vector set is K third-class vectors of the L3 third-class vectors. The L3 is a positive integer greater than the L1.
As an embodiment, channel measurements based on the third wireless signal are used to select K third type vectors in the third codebook of vectors to form the third set of vectors.
For one embodiment, the first vector is a first vector in the first vector codebook, and the third vector group is P2 third vectors in the third vector codebook corresponding to the first vector. The P2 is a positive integer greater than 1.
As one example, the L3 is the product of the L1 and the P2.
As an embodiment, the K first-type vectors in the first vector set respectively correspond to K third-type vector groups in the third vector codebook. One of the third-class vector groups consists of P2 third-class vectors. And the K third vectors in the third vector set respectively belong to the K third vector groups.
As an embodiment, the second parameter set includes indexes of K third-type vectors in the third vector set in the third vector group to which the K first-type parameter sets in the second parameter set respectively are used to determine indexes of K third-type vectors in the third vector set in the third vector group to which the K third-type vectors respectively belong.
As a sub-embodiment of the above embodiment, the index of K third vectors of the third set of vectors in the third set of vectors respectively belonging to the third set of vectors and the first set of vectors are used by the receiver of the third channel information to generate the third set of vectors.
As an embodiment, K first-type phase factors are used to generate K first-type vectors of the first set of vectors, and K third-type phase factors are used to generate K third-type vectors of the third set of vectors. The third parameter set includes K twiddle factors, and the K twiddle factors are differences between the K first-class phase factors and K third-class phase factors corresponding thereto, respectively.
As a sub-embodiment of the above embodiment, the K twiddle factors and the first set of vectors are used by a receiver of the third channel information to generate the third set of vectors.
According to an aspect of the application, wherein the first set of parameters and the third set of vectors are used to generate the second set of vectors.
As an embodiment s, the above method has the advantage of improving the efficiency of feedback.
As an embodiment, the second vector codebook consists of L2 second-class vectors. The second set of vectors are K second-class vectors of the L2 second-class vectors. The L2 is a positive integer greater than the L3.
As an embodiment, channel measurements based on the third wireless signal are used to select K second type vectors in the second vector codebook to constitute the second vector set.
As an embodiment, the third vector is a third vector in the third vector codebook, and the second vector group is P2 second vectors of the third vector in the second vector codebook. The P2 is a positive integer greater than 1.
As one example, the L2 is the product of the L3 and the P2.
As an embodiment, the K third-class vectors in the third vector codebook respectively correspond to K second-class vector groups in the second vector codebook. One of the second-class vector groups consists of P2 second-class vectors. And the K second-class vectors in the second vector set respectively belong to the K second-class vector groups.
As an embodiment, the first set of parameters consists of K sets of parameters, which are respectively used to determine the indices of K second-type vectors of the second set of vectors in the second-type vector groups to which they respectively belong.
As an embodiment, the first set of parameters comprises indices of K vectors of the second set of vectors in the group of vectors of the second type to which each belongs.
As a sub-implementation of the above embodiment, the index of the K second-type vectors of the second set of vectors in the second-type vector group to which they respectively belong and the third set of vectors are used by the receiver of the second channel information to generate the second set of vectors.
As an embodiment, K third type phase factors are used to generate K first type vectors of the third set of vectors and K second type phase factors are used to generate K second type vectors of the second set of vectors. The first parameter set comprises K twiddle factors, and the K twiddle factors are differences between the K third-class phase factors and K first-class phase factors corresponding to the K third-class phase factors, respectively.
As a sub-embodiment of the above embodiment, the K twiddle factors and the first set of vectors are used by a receiver of the third channel information to generate the third set of vectors.
As an embodiment, the time units in the third time unit pool are less than the time units in the second time unit pool.
As an embodiment, any time unit in the third pool of time units is not in the second pool of time units.
According to one aspect of the present application, among others
-receiving first information;
the first information is used to determine the third pool of time cells.
As an embodiment, the above method has the advantage of flexible configuration of feedback overhead.
As one embodiment, the first information is displayed indicating the third time cell pool.
As one embodiment, the first information implicitly indicates the third time cell pool.
As an embodiment, the first information is a higher layer signaling.
As an embodiment, the first information is RRC signaling.
As an embodiment, the first information is physical layer signaling.
As an embodiment, the first Information is DCI (Downlink Control Information).
According to one aspect of the application, the method comprises the following steps:
-receiving the second information.
The second information is used to determine one of { the first time unit pool, the second time unit pool }.
As an embodiment, the above method has the advantage of flexible configuration of feedback overhead.
As an example, the second information displays one of the indications { the first time unit pool, the second time unit pool }.
As an embodiment, the indication of the second information is implicit one of { the first time unit pool, the second time unit pool }.
As an embodiment, the second information is a higher layer signaling.
As an embodiment, the second information is RRC signaling.
As an embodiment, the second information is physical layer signaling.
As an embodiment, the second Information is DCI (Downlink Control Information).
The application discloses a method in a base station device for wireless communication, comprising:
-receiving first channel information on time units in a first pool of time units;
-receiving second channel information on time units in a second pool of time units;
the first channel information is used to determine a first set of vectors, the second channel information is used to determine a first set of parameters, the first set of vectors is used to generate the first set of parameters, the first set of parameters and the first set of vectors are used to generate a second set of vectors, the first set of vectors is composed of K first type vectors, the second set of vectors is composed of K second type vectors, the K second type vectors are in one-to-one correspondence with the K first type vectors, the second pool of time units includes a number of time units greater than a number of time units included in the first pool of time units, and K is a positive integer.
According to an aspect of the application, where K is greater than 1, any one of the first set of parameters is associated with K first type vectors of the first set of vectors.
According to one aspect of the application, there is provided:
-receiving third channel information on time units in a third pool of time units;
the K is greater than 1, the third channel information is used to determine a second set of parameters, the first set of vectors is used to generate the second set of parameters, the second set of parameters and the first set of vectors are used to generate a third set of vectors, the second set of parameters is composed of K first type parameter sets, the K first type parameter sets are in one-to-one correspondence with the K first type vectors in the first set of vectors, the third set of vectors is composed of K third type vectors, the K third type vectors are in one-to-one correspondence with the K first type vectors in the first set of vectors, and the second pool of time units includes time units that are not in the third pool of time units.
In particular, according to an aspect of the present application, wherein the first set of parameters and the third set of vectors are used to generate the second set of vectors.
Specifically, according to one aspect of the present application, the method includes:
-transmitting the first information;
the first information is used to determine the third pool of time cells.
According to one aspect of the application, the method comprises the following steps:
-transmitting the second information.
The second information is used to determine one of { the first time unit pool, the second time unit pool }.
The application discloses a user equipment for wireless communication, including:
-a first processing module to send first channel information on time units in a first pool of time units;
-a first sending module sending second channel information on time units in a second pool of time units;
the first channel information is used to determine a first set of vectors, the second channel information is used to determine a first set of parameters, the first set of vectors is used to generate the first set of parameters, the first set of parameters and the first set of vectors are used to generate a second set of vectors, the first set of vectors is composed of K first type vectors, the second set of vectors is composed of K second type vectors, the K second type vectors are in one-to-one correspondence with the K first type vectors, the second pool of time units includes a number of time units greater than a number of time units included in the first pool of time units, and K is a positive integer.
As an embodiment, the above-mentioned ue is characterized in that K is greater than 1, and any one parameter in the first parameter set is associated with K first vectors in the first vector set.
As an embodiment, the ue is characterized in that the first sending module sends the third channel information on a time unit in a third time unit pool; the K is greater than 1, the third channel information is used to determine a second set of parameters, the first set of vectors is used to generate the second set of parameters, the second set of parameters and the first set of vectors are used to generate a third set of vectors, the second set of parameters is composed of K first type parameter sets, the K first type parameter sets are in one-to-one correspondence with the K first type vectors in the first set of vectors, the third set of vectors is composed of K third type vectors, the K third type vectors are in one-to-one correspondence with the K first type vectors in the first set of vectors, and the second pool of time units includes time units that are not in the third pool of time units.
As an embodiment, the above user equipment is characterized in that the first set of parameters and the third set of vectors are used to generate the second set of vectors.
As an embodiment, the ue is characterized in that the first processing module receives first information; the first information is used to determine the third pool of time cells.
As an embodiment, the ue is characterized in that the first processing module receives second information; the second information is used to determine one of { the first time unit pool, the second time unit pool }.
The application discloses a base station device for wireless communication, including:
-a first execution module to receive first channel information on time units in a first pool of time units;
-a first receiving module receiving second channel information on time units in a second pool of time units;
the first channel information is used to determine a first set of vectors, the second channel information is used to determine a first set of parameters, the first set of vectors is used to generate the first set of parameters, the first set of parameters and the first set of vectors are used to generate a second set of vectors, the first set of vectors is composed of K first type vectors, the second set of vectors is composed of K second type vectors, the K second type vectors are in one-to-one correspondence with the K first type vectors, the second pool of time units includes a number of time units greater than a number of time units included in the first pool of time units, and K is a positive integer.
As an embodiment, the base station device is characterized in that K is greater than 1, and any one of the first parameter set is associated with K first vectors in the first vector set.
As an embodiment, the base station device is characterized in that the first receiving module receives the third channel information at a time unit in a third time unit pool; the K is greater than 1, the third channel information is used to determine a second set of parameters, the first set of vectors is used to generate the second set of parameters, the second set of parameters and the first set of vectors are used to generate a third set of vectors, the second set of parameters is composed of K first type parameter sets, the K first type parameter sets are in one-to-one correspondence with the K first type vectors in the first set of vectors, the third set of vectors is composed of K third type vectors, the K third type vectors are in one-to-one correspondence with the K first type vectors in the first set of vectors, and the second pool of time units includes time units that are not in the third pool of time units.
As an embodiment, the above base station device is characterized in that the first set of parameters and the third set of vectors are used to generate the second set of vectors.
As an embodiment, the base station device is characterized in that the first execution module sends first information; the first information is used to determine the third pool of time cells.
As an embodiment, the base station device is characterized in that the first execution module sends second information; the second information is used to determine one of { the first time unit pool, the second time unit pool }.
As an example, compared with the conventional scheme, the method has the following advantages:
-saving channel direction estimation, precoding vector feedback overhead;
-improving the channel direction estimation, the feedback accuracy of the precoding vectors;
flexible configuration of feedback overhead and accuracy.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof with reference to the accompanying drawings in which:
fig. 1 shows a flow diagram of wireless transmission according to an embodiment of the application;
FIG. 2 illustrates a schematic diagram of a first time cell pool, a second time cell pool, and a third time cell pool according to one embodiment of the present application;
FIG. 3 shows a schematic diagram of a first set of parameters, a first set of vectors, and a second set of vectors, according to an embodiment of the present application;
FIG. 4 shows a schematic diagram of an association of one parameter of a first set of parameters with K first type vectors of a first set of vectors, according to an embodiment of the present application;
fig. 5 shows a block diagram of a processing device for use in a user equipment according to an embodiment of the present application;
fig. 6 shows a block diagram of a processing device for use in a base station apparatus according to an embodiment of the present application.
Example 1
Embodiment 1 illustrates a flow chart of wireless transmission, as shown in fig. 1. In fig. 1, base station N1 is the serving cell maintenance base station for UE U2. In fig. 1, the steps in block F1, block F2, and block F3 are individually selectable.
For N1, second information is sent in step S11; transmitting the first information in step S12; receiving first channel information on time units in a first pool of time units in step S13; receiving third channel information on time cells in a third pool of time cells in step S14; in step S15, second channel information is received over time cells in a second pool of time cells.
For U2, second information is received in step S21; receiving the first information in step S22; in step S23, transmitting first channel information on time units in a first time unit pool; in step S24, transmitting third channel information on time cells in a third pool of time cells; in step S25, the second channel information is sent on time cells in a second pool of time cells.
In embodiment 1, first channel information is used by N1 to determine a first set of vectors, second channel information is used by N1 to determine a first set of parameters, the first set of vectors is used by U2 to generate the first set of parameters, the first set of parameters and the first set of vectors are used by N1 to generate a second set of vectors, the first set of vectors consists of K first type vectors, the second set of vectors consists of K second type vectors, the K second type vectors are in one-to-one correspondence with the K first type vectors, the second pool of time units includes a number of time units greater than a number of time units included in the first pool of time units, and K is a positive integer.
As sub-embodiment 1 of embodiment 1, K is greater than 1, and any one of the first set of parameters is associated with K first type vectors in the first set of vectors.
As sub-embodiment 2 of embodiment 1, the K is greater than 1, third channel information is used by N1 to determine a second set of parameters, the first set of vectors is used by U2 to generate the second set of parameters, the second set of parameters and the first set of vectors are used by N1 to generate a third set of vectors, the second set of parameters is composed of K first class parameter sets, the K first class parameter sets are in one-to-one correspondence with the K first class vectors in the first set of vectors, the third set of vectors is composed of K third class vectors, the K third class vectors are in one-to-one correspondence with the K first class vectors in the first set of vectors, and the second pool of time units includes time units that are not in the third pool of time units.
As sub-embodiment 3 of embodiment 1, the first set of parameters and the third set of vectors are used by N1 to generate the second set of vectors.
As sub-embodiment 4 of embodiment 1, comprising:
-receiving first information;
the first information is used by U2 to determine the third time cell pool.
Sub-embodiment 5, embodiment 1, which includes:
-receiving second information;
the second information is used by U2 to determine one of { the first time unit pool, the second time unit pool }.
Example 2
Example 2 illustrates a first time cell pool, a second time cell pool and a third time cell pool, as shown in fig. 2. In fig. 3, the gray filled rectangles represent time cells on the first time cell pool, the slashed filled rectangles represent time cells on the second time cell pool, and the checkered filled rectangles represent time cells on the third time cell pool.
In example 2, the number of time units in the first time cell pool is less than the number of time units in the third time cell pool, which is less than the number of time units in the second time cell pool.
As a sub-embodiment 1 of embodiment 2, there are any two time units in the third pool of time units between any two time units in the first pool of time units.
As a sub-embodiment 2 of embodiment 2, there are any two time units in the second time unit pool between any two time units in the third time unit pool.
As sub-embodiment 3 of embodiment 2, the first information is used to configure the third time cell pool.
As sub-embodiment 4 of embodiment 2, second information is used to configure the second time cell pool.
As sub-embodiment 5 of embodiment 2, the second information is also used to configure the second time cell pool.
Example 3
Example 3 illustrates a first set of parameters, a first set of vectors and a second set of vectors, as shown in fig. 3. In fig. 3, a circle is a vector in the second vector codebook, a circle with a gray background is a vector existing in both the first vector codebook and the second vector codebook, a circle with a white background is a vector existing in the second vector codebook but not in the first vector codebook, a circle with a gray background slash is a vector in the first vector set, and a circle with a white background slash is a vector in the second vector set.
In embodiment 3, the vector in the first vector codebook is also the vector in the second vector codebook, and the second vector codebook includes the vectors that are not in the first vector codebook. The first vector codebook consists of L1 vectors. The L1 is a positive integer. The second vector codebook consists of L2 vectors. The L2 is a positive integer. The L2 is greater than the L1. Generating a vector in the second vector codebook based on a horizontal phase factor and a vertical phase factor.
In embodiment 3, a vector in one first vector codebook corresponds to a vector in P1 second vector codebooks, and P1 is a positive integer greater than 1.
In embodiment 3, the first vector set and the second vector set include K first-type vectors and K second-type vectors, respectively. The K first type vectors are K vectors of the L1 vectors. The K second class vectors are K vectors of the L2 vectors. The K first-class vectors and the K second-class vectors are in one-to-one correspondence. The first vector is one vector of the first set of vectors. The second vector is one of the second set of vectors corresponding to the first vector. The second vector is one of the P1 vectors corresponding to the first vector in the second vector codebook.
In embodiment 3, the vertical rotation factor is a difference between the vertical phase factor used to generate the first vector and the vertical phase factor used to generate the second vector, and the horizontal rotation factor is a difference between the vertical phase factor used to generate the first vector and the vertical phase factor used to generate the second vector.
In embodiment 3, the first parameter set includes K vertical twiddle factors and K horizontal twiddle factors, the K vertical twiddle factors correspond to the K second-class vectors in the second vector set one by one, and the K horizontal twiddle factors correspond to the K second-class vectors in the second vector set one by one.
In example 3, the L1 equals 4, the L2 equals 36, and the K equals 2. The first set of parameters includes a first vertical rotation factor, a first horizontal rotation factor, a second vertical rotation factor, and a second horizontal rotation factor.
As sub-embodiment 1 of embodiment 3, the vector is a DFT vector.
As sub-embodiment 2 of embodiment 3, the vector is the kronecker product of two DFT vectors, one vertical phase factor and one rotation phase factor being used to generate the two DFT vectors, respectively.
Example 4
Embodiment 4 illustrates a schematic diagram of association between one parameter in the first parameter set and K first-type vectors in the first vector set, as shown in fig. 4. In fig. 4, a circle is a vector in the second vector codebook, a circle with a gray background is a vector existing in both the first vector codebook and the second vector codebook, a circle with a white background is a vector existing in the second vector codebook but not in the first vector codebook, a circle with a gray background slash is a vector in the first vector set, and a circle with a white background slash is a vector in the second vector set.
In embodiment 4, the first vector codebook, the second vector codebook, and the first vector set are the same as those of embodiment 3. But the first set of parameters includes only the first vertical twiddle factor and the first horizontal twiddle factor. The first vertical rotation factor and the first horizontal rotation factor are used jointly to determine K vectors of a second set of vectors, the K being equal to 2. And the vertical rotation factors of the K second-class vectors in the second vector set and the K first-class vectors in the first vector set respectively corresponding to the K second-class vectors are equal. And the horizontal rotation factors of the K second-class vectors in the second vector set and the K first-class vectors in the first vector set respectively corresponding to the K second-class vectors are equal.
Example 5
Embodiment 5 illustrates a block diagram of a processing apparatus used in a user equipment, as shown in fig. 5. In embodiment 5, the UE apparatus 200 is mainly composed of a first processing module 201 and a first transmitting module 202.
In embodiment 5, the first processing module 201 transmits the first channel information on the time unit in the first time unit pool, and the first transmitting module 202 transmits the second channel information on the time unit in the second time unit pool.
In embodiment 5, the first channel information is used to determine a first set of vectors, the second channel information is used to determine a first set of parameters, the first set of vectors is used to generate the first set of parameters, the first set of parameters and the first set of vectors are used to generate a second set of vectors, the first set of vectors is composed of K first type vectors, the second set of vectors is composed of K second type vectors, the K second type vectors are in one-to-one correspondence with the K first type vectors, the second pool of time units includes a number of time units greater than a number of time units included in the first pool of time units, and K is a positive integer.
As sub-embodiment 1 of embodiment 5, where K is greater than 1, any one parameter in the first set of parameters is associated with K first type vectors in the first set of vectors.
As sub-embodiment 2 of embodiment 5, the first sending module 202 sends the third channel information on time units in the third time unit pool; the K is greater than 1, the third channel information is used to determine a second set of parameters, the first set of vectors is used to generate the second set of parameters, the second set of parameters and the first set of vectors are used to generate a third set of vectors, the second set of parameters is composed of K first type parameter sets, the K first type parameter sets are in one-to-one correspondence with the K first type vectors in the first set of vectors, the third set of vectors is composed of K third type vectors, the K third type vectors are in one-to-one correspondence with the K first type vectors in the first set of vectors, and the second pool of time units includes time units that are not in the third pool of time units.
As sub-embodiment 3 of embodiment 5, the first set of parameters and the third set of vectors are used to generate the second set of vectors.
As sub-embodiment 4 of embodiment 5, the first processing module 201 receives first information; the first information is used to determine the third pool of time cells.
As a sub-embodiment 5 of embodiment 5, the first processing module 201 receives second information; the second information is used to determine one of { the first time unit pool, the second time unit pool }.
Example 6
Embodiment 6 illustrates a block diagram of a processing apparatus used in a base station device, as shown in fig. 6. In embodiment 6, the base station apparatus 300 is mainly composed of a first executing module 301 and a first receiving module 302.
In embodiment 6, the first processing module 301 sends the first channel information on a time unit in the first time unit pool, and the first sending module 302 sends the second channel information on a time unit in the second time unit pool.
As sub-embodiment 1 of embodiment 6, where K is greater than 1, any one parameter in the first set of parameters is associated with K first type vectors in the first set of vectors.
As sub-embodiment 2 of embodiment 6, the first receiving module 302 receives the third channel information at a time unit in the third time unit pool; the K is greater than 1, the third channel information is used to determine a second set of parameters, the first set of vectors is used to generate the second set of parameters, the second set of parameters and the first set of vectors are used to generate a third set of vectors, the second set of parameters is composed of K first type parameter sets, the K first type parameter sets are in one-to-one correspondence with the K first type vectors in the first set of vectors, the third set of vectors is composed of K third type vectors, the K third type vectors are in one-to-one correspondence with the K first type vectors in the first set of vectors, and the second pool of time units includes time units that are not in the third pool of time units.
As sub-embodiment 3 of embodiment 6, the first set of parameters and the third set of vectors are used to generate the second set of vectors.
As sub-embodiment 4 of embodiment 6, the first execution module 301 sends first information; the first information is used to determine the third pool of time cells.
As sub-embodiment 5 of embodiment 6, the first execution module 301 sends a second message; the second information is used to determine one of { the first time unit pool, the second time unit pool }.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE or the terminal in the application includes but is not limited to a mobile phone, a tablet computer, a notebook, a network card, an NB-IOT terminal, an eMTC terminal and other wireless communication devices. The base station or system device in the present application includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.
The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (24)

1. A method in a user equipment for wireless communication, comprising:
-transmitting first channel information on time units in a first pool of time units;
-transmitting second channel information on time units in a second pool of time units;
the first channel information is used to determine a first set of vectors, the second channel information is used to determine a first set of parameters, the first set of vectors is used to generate the first set of parameters, the first set of parameters and the first set of vectors are used to generate a second set of vectors, the first set of vectors is composed of K first type vectors, the second set of vectors is composed of K second type vectors, the K second type vectors are in one-to-one correspondence with the K first type vectors, the second pool of time units includes a number of time units greater than a number of time units included in the first pool of time units, and K is a positive integer.
2. The method of claim 1, wherein K is greater than 1, and wherein any one of the first set of parameters is associated with K first vectors of the first set of vectors.
3. The method according to claim 1 or 2, comprising:
-transmitting third channel information on time units in a third pool of time units;
the K is greater than 1, the third channel information is used to determine a second set of parameters, the first set of vectors is used to generate the second set of parameters, the second set of parameters and the first set of vectors are used to generate a third set of vectors, the second set of parameters is composed of K first type parameter sets, the K first type parameter sets are in one-to-one correspondence with the K first type vectors in the first set of vectors, the third set of vectors is composed of K third type vectors, the K third type vectors are in one-to-one correspondence with the K first type vectors in the first set of vectors, and the second pool of time units includes time units that are not in the third pool of time units.
4. The method of claim 3, wherein the first set of parameters and the third set of vectors are used to generate the second set of vectors.
5. The method of claim 3, comprising:
-receiving first information;
the first information is used to determine the third pool of time cells.
6. The method according to claim 1 or 2, comprising:
-receiving second information;
the second information is used to determine the first time unit pool or the second time unit pool.
7. A method in a base station device for wireless communication, comprising:
-receiving first channel information on time units in a first pool of time units;
-receiving second channel information on time units in a second pool of time units;
the first channel information is used to determine a first set of vectors, the second channel information is used to determine a first set of parameters, the first set of vectors is used to generate the first set of parameters, the first set of parameters and the first set of vectors are used to generate a second set of vectors, the first set of vectors is composed of K first type vectors, the second set of vectors is composed of K second type vectors, the K second type vectors are in one-to-one correspondence with the K first type vectors, the second pool of time units includes a number of time units greater than a number of time units included in the first pool of time units, and K is a positive integer.
8. The method of claim 7, wherein K is greater than 1, and wherein any one of the first set of parameters is associated with K first vectors of the first set of vectors.
9. The method according to claim 7 or 8, comprising:
-receiving third channel information on time units in a third pool of time units;
the K is greater than 1, the third channel information is used to determine a second set of parameters, the first set of vectors is used to generate the second set of parameters, the second set of parameters and the first set of vectors are used to generate a third set of vectors, the second set of parameters is composed of K first type parameter sets, the K first type parameter sets are in one-to-one correspondence with the K first type vectors in the first set of vectors, the third set of vectors is composed of K third type vectors, the K third type vectors are in one-to-one correspondence with the K first type vectors in the first set of vectors, and the second pool of time units includes time units that are not in the third pool of time units.
10. The method of claim 9, wherein the first set of parameters and the third set of vectors are used to generate the second set of vectors.
11. The method of claim 9, comprising:
-transmitting the first information;
the first information is used to determine the third pool of time cells.
12. The method according to claim 7 or 8, comprising:
-transmitting the second information;
the second information is used to determine the first time unit pool or the second time unit pool.
13. A user device for wireless communication, comprising:
-a first processing module to send first channel information on time units in a first pool of time units;
-a first sending module sending second channel information on time units in a second pool of time units;
the first channel information is used to determine a first set of vectors, the second channel information is used to determine a first set of parameters, the first set of vectors is used to generate the first set of parameters, the first set of parameters and the first set of vectors are used to generate a second set of vectors, the first set of vectors is composed of K first type vectors, the second set of vectors is composed of K second type vectors, the K second type vectors are in one-to-one correspondence with the K first type vectors, the second pool of time units includes a number of time units greater than a number of time units included in the first pool of time units, and K is a positive integer.
14. The UE of claim 13, wherein K is greater than 1, and wherein any one of the first set of parameters is associated with K first vectors of the first set of vectors.
15. The UE of claim 13 or 14, wherein the first sending module sends third channel information on time units in a third time unit pool; the K is greater than 1, the third channel information is used to determine a second set of parameters, the first set of vectors is used to generate the second set of parameters, the second set of parameters and the first set of vectors are used to generate a third set of vectors, the second set of parameters is composed of K first type parameter sets, the K first type parameter sets are in one-to-one correspondence with the K first type vectors in the first set of vectors, the third set of vectors is composed of K third type vectors, the K third type vectors are in one-to-one correspondence with the K first type vectors in the first set of vectors, and the second pool of time units includes time units that are not in the third pool of time units.
16. The user equipment of claim 15, wherein the first set of parameters and the third set of vectors are used to generate the second set of vectors.
17. The UE of claim 15, wherein the first processing module receives first information; the first information is used to determine the third pool of time cells.
18. The UE of claim 13 or 14, wherein the first processing module receives second information; the second information is used to determine the first time unit pool or the second time unit pool.
19. A base station apparatus for wireless communication, comprising:
-a first execution module to receive first channel information on time units in a first pool of time units;
-a first receiving module receiving second channel information on time units in a second pool of time units;
the first channel information is used to determine a first set of vectors, the second channel information is used to determine a first set of parameters, the first set of vectors is used to generate the first set of parameters, the first set of parameters and the first set of vectors are used to generate a second set of vectors, the first set of vectors is composed of K first type vectors, the second set of vectors is composed of K second type vectors, the K second type vectors are in one-to-one correspondence with the K first type vectors, the second pool of time units includes a number of time units greater than a number of time units included in the first pool of time units, and K is a positive integer.
20. The base station device of claim 19, wherein K is greater than 1, and wherein any one of the first set of parameters is associated with K first vectors of the first set of vectors.
21. The base station device of claim 19 or 20, wherein the first receiving module receives third channel information on time units in a third pool of time units; the K is greater than 1, the third channel information is used to determine a second set of parameters, the first set of vectors is used to generate the second set of parameters, the second set of parameters and the first set of vectors are used to generate a third set of vectors, the second set of parameters is composed of K first type parameter sets, the K first type parameter sets are in one-to-one correspondence with the K first type vectors in the first set of vectors, the third set of vectors is composed of K third type vectors, the K third type vectors are in one-to-one correspondence with the K first type vectors in the first set of vectors, and the second pool of time units includes time units that are not in the third pool of time units.
22. The base station device of claim 21, wherein the first set of parameters and the third set of vectors are used to generate the second set of vectors.
23. The base station apparatus according to claim 21, comprising:
-transmitting the first information;
the first information is used to determine the third pool of time cells.
24. The base station device according to claim 19 or 20, wherein the first executing module sends second information; the second information is used to determine the first time unit pool or the second time unit pool.
CN201710286712.8A 2017-04-27 2017-04-27 Method and device for wireless communication in base station and user equipment Active CN108809384B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105119854A (en) * 2008-03-26 2015-12-02 高通股份有限公司 Method and apparatus for scrambling sequence generation in a communication system
CN105846945A (en) * 2010-12-02 2016-08-10 交互数字专利控股公司 Wireless device and method executed by the wireless devcie

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105119854A (en) * 2008-03-26 2015-12-02 高通股份有限公司 Method and apparatus for scrambling sequence generation in a communication system
CN105846945A (en) * 2010-12-02 2016-08-10 交互数字专利控股公司 Wireless device and method executed by the wireless devcie

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