CN113676231A

CN113676231A - Electronic device and method for wireless communication, computer-readable storage medium

Info

Publication number: CN113676231A
Application number: CN202010406818.9A
Authority: CN
Inventors: 刘文东; 王昭诚; 曹建飞
Original assignee: Sony Corp
Current assignee: Sony Corp
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2021-11-19
Also published as: WO2021227932A1; CN115606106A

Abstract

The present disclosure provides an electronic device, method, and computer-readable storage medium for wireless communication, wherein the electronic device for wireless communication includes processing circuitry configured to: transmitting a channel measurement signal to a user equipment through an orthogonal beam set among transmit beam sets for communication with the user equipment; and selecting at least one part of the transmission beams from the transmission beam set according to the channel state feedback signals of at least one part of the orthogonal beams in the orthogonal beam set reported by the user equipment, wherein the channel state feedback signals are related to the channel measurement signals, and the at least one part of the transmission beams are used for communicating with the user equipment.

Description

Electronic device and method for wireless communication, computer-readable storage medium

Technical Field

The present disclosure relates to the field of wireless communications technologies, and in particular, to beam training. And more particularly, to an electronic device and method for wireless communication and a computer-readable storage medium.

Background

In a 5G millimeter wave communication system, multi-beam transmission is generally adopted to increase the reception power of users. By adopting more transmitting antennas and transmitting beams, the beam forming gain can be improved, but the beam training overhead is also increased, so that the time for transmitting effective data is reduced, and the system spectrum efficiency is influenced.

Disclosure of Invention

The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.

According to an aspect of the disclosure, there is provided an electronic device for wireless communication, comprising processing circuitry configured to: transmitting a channel measurement signal to a user equipment through an orthogonal beam set among transmit beam sets for communication with the user equipment; and selecting at least one part of the transmission beams from the transmission beam set according to the channel state feedback signals of at least one part of the orthogonal beams in the orthogonal beam set reported by the user equipment, wherein the channel state feedback signals are related to the channel measurement signals, and the at least one part of the transmission beams are used for communicating with the user equipment.

According to the electronic equipment disclosed by the embodiment of the disclosure, the channel measurement signal is only required to be sent to the user equipment through the orthogonal beam set in the transmission beam set, and the channel measurement signal is not required to be sent to the user equipment through all the transmission beams in the transmission beam set, so that the overhead of beam training can be effectively reduced; in addition, the electronic device only needs to receive the channel state feedback signals of at least a part of orthogonal beams in the orthogonal beam set reported by the user equipment, and does not need to receive the channel state feedback signals of all transmission beams in the transmission beam set, which are related to the channel measurement signals, so that the feedback overhead of beam training can be effectively reduced.

According to another aspect of the disclosure, there is provided an electronic device for wireless communication, comprising processing circuitry configured to: receiving channel measurement signals transmitted by a base station through an orthogonal beam set in a transmission beam set for communicating with the electronic equipment; and reporting a channel state feedback signal of at least a part of the orthogonal beams in the orthogonal beam set about the channel measurement signal to the base station, so that the base station selects at least a part of the transmission beams from the transmission beam set for communication with the electronic equipment.

According to another aspect of the disclosure, there is provided an electronic device for wireless communication, comprising processing circuitry configured to: transmitting information to the user equipment about an orthogonal beam set of a set of transmit beams used for the electronic equipment to communicate with the user equipment; transmitting a channel measurement signal to the user equipment through the orthogonal beam set; and receiving information about at least a part of the transmit beams from the user equipment for communication with the user equipment, wherein the user equipment selects at least a part of the transmit beams from the transmit beam set based on a channel state feedback signal of orthogonal beams of the orthogonal beam set with respect to the channel measurement signal.

According to the electronic equipment disclosed by the embodiment of the disclosure, the channel measurement signal is only required to be sent to the user equipment through the orthogonal beam set in the transmission beam set, and the channel measurement signal is not required to be sent to the user equipment through all the transmission beams in the transmission beam set, so that the overhead of beam training can be effectively reduced; furthermore, the electronic device receives information of at least a part of the transmit beams determined by beam selection on the user equipment side from the user equipment without the user equipment feeding back the beam training results of the orthogonal beam set to the electronic device, so that the feedback overhead of the beam training can be effectively reduced.

According to another aspect of the disclosure, there is provided an electronic device for wireless communication, comprising processing circuitry configured to: receiving, from a base station, information about an orthogonal beam set of a set of transmit beams used for the base station to communicate with an electronic device; receiving a channel measurement signal sent by a base station through an orthogonal beam set; and selecting at least a portion of the transmit beams from the transmit beam set for communication with the base station based on channel state feedback signals of the orthogonal beams in the orthogonal beam set with respect to the channel measurement signals.

According to another aspect of the present disclosure, there is provided a method for wireless communication, the method comprising: transmitting a channel measurement signal to a user equipment through an orthogonal beam set among transmit beam sets for communication with the user equipment; and selecting at least one part of the transmission beams from the transmission beam set according to the channel state feedback signals of at least one part of the orthogonal beams in the orthogonal beam set reported by the user equipment, wherein the channel state feedback signals are related to the channel measurement signals, and the at least one part of the transmission beams are used for communicating with the user equipment.

According to another aspect of the present disclosure, there is provided a method for wireless communication, the method comprising: receiving channel measurement signals transmitted by a base station through an orthogonal beam set in a transmission beam set for communicating with the electronic equipment; and reporting a channel state feedback signal of at least a part of the orthogonal beams in the orthogonal beam set about the channel measurement signal to the base station, so that the base station selects at least a part of the transmission beams from the transmission beam set for communication with the electronic equipment.

According to another aspect of the present disclosure, there is provided a method for wireless communication, the method comprising: transmitting information to the user equipment about an orthogonal beam set of a set of transmit beams used for the electronic equipment to communicate with the user equipment; transmitting a channel measurement signal to the user equipment through the orthogonal beam set; and receiving information about at least a part of the transmit beams from the user equipment for communication with the user equipment, wherein the user equipment selects at least a part of the transmit beams from the transmit beam set based on a channel state feedback signal of orthogonal beams of the orthogonal beam set with respect to the channel measurement signal.

According to another aspect of the present disclosure, there is provided a method for wireless communication, the method comprising: receiving, from a base station, information about an orthogonal beam set of a set of transmit beams used for the base station to communicate with an electronic device; receiving a channel measurement signal sent by a base station through an orthogonal beam set; and selecting at least a portion of the transmit beams from the transmit beam set for communication with the base station based on channel state feedback signals of the orthogonal beams in the orthogonal beam set with respect to the channel measurement signals.

According to other aspects of the present invention, there are also provided a computer program code and a computer program product for implementing the above-described method for wireless communication, and a computer-readable storage medium having recorded thereon the computer program code for implementing the above-described method for wireless communication.

Drawings

To further clarify the above and other advantages and features of the present invention, a more particular description of embodiments of the invention will be rendered by reference to the appended drawings. The accompanying drawings, which are incorporated in and form a part of this specification, together with the detailed description below. Elements having the same function and structure are denoted by the same reference numerals. It is appreciated that these drawings depict only typical examples of the invention and are therefore not to be considered limiting of its scope. In the drawings:

fig. 1 shows a functional block diagram of an electronic device for wireless communication according to one embodiment of the present disclosure.

Fig. 2A and 2B show examples of transmit beam patterns.

Fig. 3 is a schematic diagram illustrating beam training and feedback based on a significant orthogonal beam set, in accordance with an embodiment of the present disclosure.

Fig. 4A and 4B are schematic diagrams illustrating including phase information in a reporting list and including a relative phase in the reporting list according to an embodiment of the disclosure.

Fig. 5 shows a schematic diagram of an electronic device performing physical downlink channel estimation according to an embodiment of the disclosure.

Fig. 6A and 6B illustrate exemplary diagrams of the magnitude of channel correlation according to an embodiment of the present disclosure.

Fig. 7 shows a schematic diagram of user scheduling according to an embodiment of the present disclosure.

Fig. 8 shows a schematic diagram of an example of signaling based on beam training and user scheduling for a significant orthogonal beam set according to an embodiment of the present disclosure.

Fig. 9 shows a schematic diagram of orthogonal beam sets with a planar antenna array in accordance with an embodiment of the present disclosure.

Fig. 10 shows a graph of reference signal received power of a transmit beam of the transmit beam set and estimated reference signal received power of the transmit beam as a function of the predetermined number L according to an embodiment of the disclosure.

Fig. 11 shows a simulation graph of the beam misselection rate of the optimal transmit beam as a function of the predetermined number L according to an embodiment of the disclosure.

Fig. 12 shows a simulation plot of the estimated relative error of the channel as a function of a predetermined amount L, according to an embodiment of the disclosure.

Fig. 13 shows a functional block diagram of an electronic device for wireless communication according to one embodiment of the present disclosure.

Fig. 14 shows a functional block diagram of an electronic device for wireless communication according to one embodiment of the present disclosure.

Fig. 15 shows a functional block diagram of an electronic device for wireless communication according to one embodiment of the present disclosure.

Fig. 16 shows a flow diagram of a method for wireless communication according to one embodiment of the present disclosure.

Fig. 17 shows a flow diagram of a method for wireless communication according to one embodiment of the present disclosure.

Fig. 18 shows a flow diagram of a method for wireless communication according to one embodiment of the present disclosure.

Fig. 19 shows a flow diagram of a method for wireless communication according to one embodiment of the present disclosure.

Fig. 20 is a block diagram illustrating a first example of a schematic configuration of an eNB or a gNB to which the techniques of this disclosure may be applied.

Fig. 21 is a block diagram illustrating a second example of a schematic configuration of an eNB or a gNB to which the techniques of this disclosure may be applied.

Fig. 22 is a block diagram showing an example of a schematic configuration of a smartphone to which the technique of the present disclosure can be applied.

Fig. 23 is a block diagram showing an example of a schematic configuration of a car navigation device to which the technique of the present disclosure can be applied.

Fig. 24 is a block diagram showing an example structure of a personal computer employable in the embodiments of the present disclosure.

Detailed Description

Exemplary embodiments of the present disclosure will be described hereinafter with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in the specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

Here, it should be further noted that, in order to avoid obscuring the present disclosure with unnecessary details, only the device structures and/or processing steps closely related to the scheme according to the present disclosure are shown in the drawings, and other details not so relevant to the present disclosure are omitted.

Embodiments according to the present disclosure are described in detail below with reference to the accompanying drawings.

Fig. 1 shows a functional block diagram of an electronic device 100 for wireless communication according to an embodiment of the present disclosure, as shown in fig. 1, the electronic device 100 includes: a transmitting unit 102, which may be configured to transmit a channel measurement signal to a user equipment through an orthogonal beam set among transmit beam sets used for communication with the user equipment; and a first processing unit 104, which may be configured to select at least a part of the transmit beams from the transmit beam set for communication with the user equipment, according to a channel state feedback signal of at least a part of the orthogonal beams in the orthogonal beam set reported by the user equipment with respect to the channel measurement signal.

Therein, the sending unit 102 and the first processing unit 104 may be implemented by one or more processing circuits, which may be implemented as chips, for example.

The electronic device 100 may for example be provided on the base station side or be communicatively connected to a base station. Here, it is also noted that the electronic device 100 may be implemented at the chip level, or also at the device level. For example, the electronic device 100 may operate as a base station itself, and may also include external devices such as memory, transceivers (not shown), and the like. The memory may be used to store programs and related data information that the base station needs to perform to implement various functions. The transceiver may include one or more communication interfaces to support communication with different devices (e.g., user equipment, other base stations, etc.), and implementations of the transceiver are not particularly limited herein.

Let M be the number of antennas on the side of the electronic device 100, M be a positive integer, the transmit beam set comprises a set of transmit beams (transmit beams used by the electronic device 100 for communicating with user equipment) generated by M antennas, let N be the number of transmit beams in the transmit beam set, N be a positive integer, and a beam vector of an nth transmit beam in the transmit beam set is represented as

N is more than or equal to 1 and less than or equal to N, wherein, the vector space

Representing a complex set of M dimensions. Since the number of antennas at the side of the electronic device 100 is M and only M orthogonal bases exist in an M-dimensional finite space, the number of beams in an orthogonal beam set in a transmission beam set is M, wherein the orthogonal beam set refers to selecting codeword vectors from a predefined codebook to represent beams, wherein the product of two-by-two of the selected codeword vectors is zero, that is, every two beams in the orthogonal beam set are orthogonal to each other.

In an actual scenario, in order to enhance beam coverage, ensure beamforming gain of users in different directions and more accurate channel state information feedback, an oversampled transmit beam set is generally adopted.

The oversampling ratio can be expressed as:

fig. 2A and 2B show examples of transmit beam patterns. In fig. 2A, N ═ NM-8, so fig. 2A shows no oversampling (oversampling rate O)_s1) transmit beam pattern. In fig. 2B, M is 8, N is 2M is 16, and thus fig. 2B shows the oversampling ratio O_sA transmit beam pattern of 2. In NR (New Radio, 5G air interface), the oversampling rate is typically

O

_s2 or 4.

The channel measurement signal transmitted by the transmitting unit 102 is a downlink signal, and for example, the channel measurement signal may be an SSB (synchronization signal block) or a CSI-RS (channel state information reference signal).

After the electronic device 100 transmits the channel measurement signal, the user equipment measures a channel state feedback signal of each orthogonal beam in the orthogonal beam set with respect to the channel measurement signal (i.e., the user equipment measures a channel state feedback signal obtained through each orthogonal beam), thereby obtaining a beam training result for performing beam training on the orthogonal beam in the orthogonal beam set, and the user equipment reports the channel state feedback signal of at least a part of the orthogonal beams in the orthogonal beam set to the electronic device 100.

As an example, the amplitude of the channel state feedback signal may be represented by RSRP (reference signal received power), RSRQ (reference signal received quality), or information representing signal quality like a signal-to-noise ratio or the like. Other examples of representing the amplitude of the channel state feedback signal will also occur to those skilled in the art and will not be discussed further herein. Hereinafter, for simplicity, description is made assuming that the amplitude of the channel state feedback signal is represented by RSRP.

The electronic device 100 according to the embodiment of the present disclosure only needs to send the channel measurement signal to the user equipment through the orthogonal beam set in the transmission beam set, and does not need to send the channel measurement signal to the user equipment through all the transmission beams in the transmission beam set, so that the overhead of beam training can be effectively reduced; in addition, the electronic device 100 only needs to receive the channel state feedback signals of at least a part of the orthogonal beams in the orthogonal beam set reported by the user equipment with respect to the channel measurement signal, and does not need to receive the channel state feedback signals of all the transmission beams in the transmission beam set with respect to the channel measurement signal, so that the feedback overhead of beam training can be effectively reduced.

As an example, a linear combination of orthogonal beams in the orthogonal beam set can synthesize each transmit beam in the transmit beam set.

Since only M Orthogonal bases exist in M-dimensional finite space, an Orthogonal Beam Set (OBS) matrix B is selected as [ B ═ B₁,b₂,…,b_M]Which satisfies B^HI (H denotes the conjugate transpose operation), and each vector B in B_i(1 ≦ i ≦ M) one of the orthogonal sets of beams, represented by vector b₁,b₂,…,b_MThe respectively represented orthogonal beams constitute an orthogonal beam set. Hereinafter, the above orthogonal beam set is sometimes referred to simply as OBS.

Then, f_nCan be obtained by linear combination of B:

in equation (2), α_n＝B^-1f_nIs f_nProjection coefficient vector on OBS.

In practical systems, DFT (fourier transform) codebooks are usually employed in vector space

Select the OBS. For example, M orthogonal DFT beam vectors are used as OBS, where b_iCan be expressed as:

in equation (3), β_iIs the angle of the ith (i ═ 1, …, M) beam vector. By setting beta_iMay be such that the DFT beam vector b_iAre orthogonal two by two. Those skilled in the art will appreciate that there are also vector spaces in the art

Other ways of selecting OBS are not described here in detail.

As an example, the channel state feedback signal may include phase information.

The user equipment may measure the orthogonal beam b in the OBS after receiving the channel measurement signal transmitted by the electronic device 100 through the OBS_i(1 ≦ i ≦ M) channel state feedback signal q for channel measurement signals_iAmplitude | q of_iL (1. ltoreq. i. ltoreq.M) (e.g. with the transmit beam b)_iCorresponding RSRP) and phase phi_i. For example, the measurement results are obtained by averaging (e.g., arithmetic mean or weighted mean) the measurement results on a plurality of time-frequency resources.

In equation (4), q_iIs the user equipment in the orthogonal beam b_iThe beam training result of (1).

In the electronic apparatus 100 according to the embodiment of the present disclosure, the electronic apparatus 100 receives not only amplitude information of a channel state feedback signal but also phase information of the channel state feedback signal from a user equipment for calculating or estimating a channel state feedback signal (r to be described hereinafter) of all transmission beams in a transmission beam set with respect to a channel measurement signal_n，1≤n≤N)。

Q may be_iExpressed as:

q_i＝h^Tb_i (5)

in the case of the equation (5),

is a channel vector between the electronic device 100 and the user equipment.

Based on equations (2) and (5), each transmit beam in the transmit beam set has a channel state feedback signal r with respect to the channel measurement signal_n(which is the transmit beam f_nBeam training results of) may be expressed as:

r_n＝h^Tf_n＝h^TBα_n＝q^Tα_n (6)

in equation (6), q ═ q₁,q₂,…,q_M]Representing the beam training result of the user equipment on the OBS, T representing the transposition operation, alpha_nIs f_nAnd N is more than or equal to 1 and less than or equal to N in the projection coefficient vector on the OBS. As can be seen from equation (6), the electronic device 100 can accurately reconstruct the channel state feedback signal r of each transmission beam in the transmission beam set based on the channel state feedback signals of the orthogonal beams in the OBS reported by the user equipment_n。

On a per transmit beam f basis_nBeam training result r of_nThe electronic device 100 may select a transmit beam from the set of transmit beams for communicating with the user device. For example, the electronic device 100 may select r from the transmit beamset_nThe beam with the largest amplitude is used as the optimal transmitting beam, and the serial number n of the optimal transmitting beam_oCan be expressed by the following equation (7):

hereinafter, n will sometimes be_oReferred to as an optimum beam selected based on OBS. As above, the electronic device 100 feeds back the signal q based on the channel state of the orthogonal beam in the orthogonal beam set reported by the user equipment_iCan accurately reconstruct the channel state feedback signal r of each transmitting beam in the transmitting beam set_nAnd thus the optimal beam n selected based on OBS_oCorresponding to a practically optimal transmit beam.

For example, the electronic device 100 may utilize the optimal beam n_oAnd transmitting downlink DMRS (demodulation reference signal), data and the like.

As an example, the at least a portion of the orthogonal beams includes a predetermined number of orthogonal beams from a maximum amplitude in a descending order of amplitudes of the channel state feedback signals from the beams in the orthogonal beam set.

For example, orthogonal beams in OBS may be arranged in|q_iL (1 ≦ i ≦ M), and selecting a predetermined number L (1 ≦ L ≦ M) of beams starting from the maximum amplitude as the at least a portion of the orthogonal beams, L being a positive integer. For example, L orthogonal beams may be optionally selected from the OBS as the at least one part of orthogonal beams. When L is M, the set of L orthogonal beams is the OBS, and when L is M<M, the Set of L Orthogonal beams is referred to as D-OBS (Dominant Orthogonal Beam Set). In the above, orthogonal beams b in OBS in the case of L ═ M have been given_i(1 ≦ i ≦ M) channel state feedback signal q for channel measurement signals_iEach transmission beam in the set of transmission beams is related to a channel state feedback signal r of the channel measurement signal_nAnd so on. Hereinafter, will be directed primarily to L<The case of M is described. Hereinafter, beam training related to a channel state feedback signal of the OBS reported by the user equipment is referred to as OBS-based beam training, and beam training related to a channel state feedback signal of the D-OBS reported by the user equipment is referred to as D-OBS-based beam training.

For example, mixing q_i(i is more than or equal to 1 and less than or equal to M) is obtained by sequencing according to the descending order of the amplitude:

in equation (8), q ═ q₁,q₂,…,q_M]P is a permutation matrix, P is used to order the elements in the vector q in descending order of magnitude.

From the sorted vectors

The predetermined number L of elements from which the maximum amplitude is selected can be expressed as:

in equation (9), E ═ I_L 0]For sorting out vectors

Wherein a predetermined number L of elements starting from the maximum amplitude are selected to form a vector

Are the channel state feedback signals (beam training results on D-OBS) of the at least a portion of the orthogonal beams, respectively, that is,

the subset formed by the transmitting beams corresponding to the L beam training results in the training is D-OBS. Where E is a matrix of size M L, I_LAn identity matrix of size L × L is represented.

As an example, the first processing unit 104 may be configured to notify the user equipment of the predetermined number L through downlink control information or broadcast signaling. For example, the electronic device may set a different predetermined number L for a cell or user equipment. For example, the predetermined number L corresponding to the cell in which the user equipment is located may be set according to signaling complexity or the like. For example, the predetermined number L corresponding to the user equipment may be set according to at least one of own processing capability, service level, and channel condition of the user equipment.

As an example, the first processing unit 104 may be configured to estimate a channel state feedback signal for each transmit beam in the transmit beam set with respect to the channel measurement signal based on a channel state feedback signal for at least a portion of the orthogonal beams in the orthogonal beam set reported by the user equipment with respect to the channel measurement signal, and select at least a portion of the transmit beams based on the estimated channel state feedback signal.

Referring to equation (6), the first processing unit 104 feeds back a channel state feedback signal with respect to a channel measurement signal based on orthogonal beams in the D-OBS

Each transmission beam f of the transmission beam set_nChannel state inversion with respect to channel measurement signalsThe feed signal is estimated as

(which is the transmit beam f_nThe estimate of the beam training result) is:

in the case of the equation (10),

is f_nVector of projection coefficients on D-OBS, α_nIs f_nProjection coefficient vector on OBS.

As can be seen from equation (10), the electronic device 100 can estimate the channel state feedback signal of each transmission beam in the transmission beam set based on the channel state feedback signals of the orthogonal beams in the D-OBS reported by the user equipment

Based on

The electronic device 100 may select a transmit beam from a set of transmit beams for communicating with the user device. For example, the electronic device 100 may select from a transmit beamset

The beam with the largest amplitude is used as the estimated optimal transmitting beam, and the sequence number of the estimated optimal transmitting beam

Can be expressed by the following equation (11):

for example, the electronic apparatus 100 can utilize the estimated optimal transmit beam

And transmitting downlink DMRS (demodulation reference signal), data and the like.

Fig. 3 is a schematic diagram illustrating beam training and feedback based on D-OBS, according to an embodiment of the disclosure.

As shown in fig. 3, the electronic device 100 transmits a channel measurement signal (in fig. 3, it is assumed that the channel measurement signal is CSI-RS) to a user equipment (in fig. 3, the user equipment is shown as a handset) through orthogonal beams 1 to M among the orthogonal beam sets. As shown in fig. 3, the orthogonal beam 1 is beam-trained with CSI-RS 1, the orthogonal beam 2 is beam-trained with CSI-RS 2, … …, the orthogonal beam M-1 is beam-trained with CSI-RS M-1, and the orthogonal beam M is beam-trained with CSI-RS M. Also, information on the sequence number of the beam corresponding to the CSI-RS is represented by a CRI (CSI-RS Resource Indicator).

Assuming that the predetermined number L is 2, the amplitude of the channel state feedback signal of the orthogonal beam 1 with respect to the channel measurement signal is RSRP 1 and the amplitude of the channel state feedback signal of the orthogonal beam 2 with respect to the channel measurement signal is RSRP 2, and L amplitudes from the maximum amplitude after the amplitudes of the channel state feedback signals of the orthogonal beam 1 to the orthogonal beam M are sorted in descending order are RSRP 1 and RSRP 2, respectively. Thus, orthogonal beam 1 and orthogonal beam 2 form a D-OBS. The user equipment feeds back to the electronic device 100 the following information about orthogonal beam 1 and orthogonal beam 2, included in the reporting list: information about the sequence number of orthogonal beam 1, represented by CRI 1, and the amplitude RSRP 1 and phase φ of the channel state feedback signal of orthogonal beam 1₁Information on the sequence number of orthogonal beam 2, represented by CRI 2, and the amplitude RSRP 2 and phase phi of the channel state feedback signal of orthogonal beam 2₂。

As an example, the first processing unit 104 may be configured to receive phase information reported by the user equipment with a relative phase between phases of orthogonal beams of the at least part of orthogonal beams.

Can be expressed as in equation (10)

Expressed as the following equation (12):

in the case of the equation (12),

is composed of

Of amplitude phi_lIs prepared by

L is more than or equal to 1 and less than or equal to L.

Channel state feedback signal, D-OBS, containing only relative phase information.

With reference to equation (10), can be based on

To transmit a beam f_nThe channel state feedback signal estimation about the channel measurement signal is

As can be seen from equation (13), since the transmit beam f can be estimated based on the channel state feedback signal containing only the relative phase information_nChannel shape for channel measurement signalsThe phase feedback signal, therefore, the user equipment may use the relative phase to feedback the phase information (i.e., report the relative phase included in the report list to the electronic device 100), that is, the electronic device 100 may receive the phase information reported by the user equipment with the relative phase, so as to reduce the phase feedback overhead.

And

the relationship between can be expressed as:

as can be seen from equation (14),

and

there is only a phase difference between them, and the amplitude values of both are the same, therefore, it is useful

Substitution

The number of the optimal transmission beam estimated by equation (11) is not affected

The result of (1).

Although in the foregoing description, the same is true for

Has the largest amplitude among the elements in (1)

Phase phi of₁Obtaining relative phase phi for reference₂-φ₁、…、φ_L-φ₁However, as will be appreciated by those skilled in the art, other techniques are also possible

The relative phase is obtained with reference to the phase of the other elements in (b), which will not be described in detail herein. Furthermore, although incorporated in the above description

The relative phase is described, however, one skilled in the art will appreciate that the relative phase may also be similarly applied to q ═ q in equation (6)₁,q₂,…,q_M]And will not be described here again.

Fig. 4A and 4B are schematic diagrams illustrating including phase information in a reporting list and including a relative phase in the reporting list according to an embodiment of the disclosure. In the report list shown in fig. 4A, the amplitudes of the channel state feedback signals of L orthogonal beams (represented by CRI 1, CRI 2, … …, and CRI L, respectively) in the D-OBS are represented as RSRP 1, RSRP 2, … …, and RSRP L (where RSRP 1, RSRP 2, … …, and RSRP L are sorted in descending order of amplitude), and the corresponding phase information is Φ respectively₁、φ₂、……、φ_L. In the reporting list shown in fig. 4B, the phase phi of the channel state feedback signals of L orthogonal beams relative to the channel state feedback signal with the maximum amplitude (whose amplitude is RSRP 1) is phi₁Are respectively 0 and phi₂-φ₁、……、φ_L-φ₁。

As an example, the first processing unit 104 may be configured to receive relative phases quantized by different numbers of quantization bits reported by the user equipment. By doing so, the number of bits used for feeding back the relative phase of quantization can be reduced.

As an example, the number of quantization bits of the relative phase of the orthogonal beam is larger as the amplitude of the channel state feedback signal of the orthogonal beam of the at least a portion of the orthogonal beams is larger.

For example, the relative phase of the channel state feedback signal with large amplitude may be quantized with more bits since the larger the amplitude of the channel state feedback signal has a greater effect on the outcome of transmit beam selection.

As an example, the first processing unit 104 may be configured to estimate information of a channel between the electronic device 100 and the user equipment based on the at least one portion of orthogonal beams and a channel state feedback signal of the at least one portion of orthogonal beams with respect to the channel measurement signal.

Based on equation (5), the first processing unit 104 may estimate the physical downlink channel vector h between the electronic device 100 and the user equipment as:

h＝(B^-1)^Tq＝B^*q (15)

in equation (15), q ═ q₁,q₂,…,q_M]Represents the result of the beam training on OBS, B^*Represents the conjugate of the OBS matrix B, and represents the conjugate operation. Equation (15) shows that B^*Is a set of orthogonal bases of the physical downlink channel vector h. As can be seen from equation (15), the physical downlink channel vector can be estimated from the beam training result on the OBS.

Further, the first processing unit 104 is based on the beam training result on the D-OBS

And the estimated physical downlink channel vector

Can be expressed as:

in the case of the equation (16),

is a matrix of the D-OBS,

there are L vectors, each vector representing one beam in the D-OBS,

to represent

Conjugation of (1). As can be seen from equation (16), the physical downlink channel vector can be estimated from the beam training result on the D-OBS.

Fig. 5 is a diagram illustrating the electronic device 100 performing physical downlink channel estimation according to an embodiment of the disclosure. In fig. 5, it is assumed that L is 2, and that orthogonal beam 1 and orthogonal beam 2 constitute D-OBS.

As shown in fig. 5, the electronic device 100 transmits a channel measurement signal to a user equipment (in fig. 5, the user equipment is shown as a handset) through orthogonal beams 1 to M among the orthogonal beam sets. The user equipment feeds back to the electronic device 100 the following information about the orthogonal beam 1 and the orthogonal beam 2 in the D-OBS, included in the reporting list: information about the sequence number of orthogonal beam 1, represented by CRI 1, and the amplitude RSRP 1 and phase φ of the channel state feedback signal of orthogonal beam 1₁Information on the sequence number of orthogonal beam 2, represented by CRI 2, and the amplitude RSRP 2 and phase phi of the channel state feedback signal of orthogonal beam 2₂. Based on the above information in the received reporting list, the electronic device 100 estimates a physical downlink channel vector according to equation (16)

As an example, the first processing unit 104 may be configured to estimate a channel correlation between a first user equipment and a second user equipment based on information of a channel corresponding to the first user equipment and information of a channel corresponding to the second user equipment, and schedule the first user equipment and the second user equipment based on the channel correlation.

It is assumed that the first user equipment is the kth user equipment, and the second user equipment is the s-th user equipment,the information of the channel corresponding to the kth ue (e.g., the physical downlink channel vector between the electronic device 100 and the kth ue) is h_kThe information of the channel corresponding to the s-th ue (e.g. the physical downlink channel vector between the electronic device 100 and the s-th ue) is h_s。

The channel correlation between the kth user equipment and the s-th user equipment may be denoted as c based on the beam training result of the user equipment on the OBS_k,s：

In equation (17), the vector q_kIs the result of beam training on OBS measured by the kth user equipment, vector q_sIs the result of beam training on OBS measured by the s-th user equipment, B^*Representing the conjugate of the OBS matrix B.

Further, the channel correlation between the kth user equipment and the s-th user equipment can be expressed as a beam training result on the D-OBS based on the user equipment

In the case of the equation (18),

is a beam training result on the D-OBS corresponding to the kth user equipment based on equation (9),

is a beam training result on the D-OBS corresponding to the s-th user equipment based on equation (9),

represents a D-OBS matrix corresponding to the kth user equipment,

representing the D-OBS matrix, Δ, corresponding to the s-th user equipment_k,sIs denoted as delta (k)_i,s_j) When k is_i＝s_jWhen, delta (k)_i,s_j) 1, otherwise δ (k)_i,s_j) 0. Wherein k is more than or equal to 1_iM and s are not less than 1_jM is less than or equal to the sequence number of the ith orthogonal beam of the kth user and the sequence number of the jth orthogonal beam of the s user respectively.

Fig. 6A and 6B illustrate channel correlation according to an embodiment of the disclosure

Example graph of the size of (c). In fig. 6A and 6B, user k denotes a kth user equipment and user s denotes an s-th user equipment, and the 1 st orthogonal beam is denoted by orthogonal beam 1 and the 2 nd orthogonal beam is denoted by orthogonal beam 2. In FIG. 6A, k₁＝s₁＝1,k₂＝s ₂2, channel correlation

Is large; in FIG. 6B, k₁＝s₂＝1,k₂＝s ₁2, channel correlation

Is smaller.

The electronic device 100 may perform user scheduling in a multi-user MU-MIMO system based on the channel correlation.

As an example, the first processing unit 104 may be configured to schedule the first user equipment and the second user equipment to be served within the same time-frequency resource in case the channel correlation is smaller than a predetermined threshold.

For example, in use c_k,sRepresenting the above-mentioned channel correlation, the first processing unit 104 may be configured to be at c_k,sAnd under the condition that the number of the user equipment is less than the preset threshold value, scheduling the kth user equipment and the s-th user equipment in the same time-frequency resource for service. In use

In the case of representing the above-mentioned channel correlation, the first processing unit 104 may be configured to perform the above-mentioned channel correlation

And under the condition that the number of the user equipment is less than the preset threshold value, scheduling the kth user equipment and the s-th user equipment in the same time-frequency resource for service.

As an example, the first processing unit 104 may schedule the first user equipment and the second user equipment to be served within the same time-frequency resource when an intersection between the at least one portion of orthogonal beam corresponding to the first user equipment and the at least one portion of orthogonal beam corresponding to the second user equipment is empty.

It is still assumed that the first user equipment is the kth user equipment and the second user equipment is the s-th user equipment.

Note the book

And

D-OBS corresponding to the kth user equipment and the s-th user equipment respectively when

And when the two user equipment are in the same time, the corresponding D-OBSs are orthogonal. At this time there is a_k,s0 and

the interference between the kth and the s-th ues is very small and can be scheduled in the same time-frequency resource.

Fig. 7 shows a multi-user scenario where M is 8, L is 3, and the number of user equipments is 4, and in fig. 7, 4 user equipments are represented by user 1, user 2, user 3, and user 4, respectively. The row corresponding to each user in fig. 7 includes M — 8 orthogonal beams, and

numerals

1, 2, and 3 in each row denote the sequence numbers of the orthogonal beams included in the D-OBS corresponding to the user. As can be seen from FIG. 7, the intersection of user 1's D-OBS with user 3's and user 4's D-OBS is empty, while the intersection of user 2's D-OBS with user 4's only D-OBS is empty. To ensure that the interference is minimized for the system, user 1 and user 3 may be scheduled on the same time-frequency resource (e.g., time-frequency resource 1), while user 2 and user 4 may be scheduled on the same time-frequency resource (e.g., time-frequency resource 2).

As an example, the user equipment may feed back L in addition to the channel state feedback signals of the above-mentioned L orthogonal beams₁The channel state feedback signal of the orthogonal beam with the smallest amplitude (e.g., RSRP) of the channel state feedback signals is used for multi-user scheduling to minimize inter-user interference. With L₁For example, assuming that the base station simultaneously serves 2 users at the same time, it is most desirable that the beam of each of the 2 users is the minimum RSRP beam of another user, so as to minimize the inter-user interference. For example, the serving beam for user 1 is beam 1, the minimum RSRP beam is beam 3; the serving beam of user 2 is beam 3, and the minimum RSRP beam is beam 1, at this time, user 1 and user 2 may be scheduled in one time-frequency resource, so as to minimize interference.

Fig. 8 shows a schematic diagram of an example of signaling based on beam training and user scheduling for a significant orthogonal beam set according to an embodiment of the present disclosure. At S1, the electronic device 100 sends a channel measurement signal to the user equipment through the OBS; at S2, the electronic device 100 transmits information including the number L of beams included in the D-OBS to the user equipment; at S3, the user equipment measures a channel state feedback signal of the orthogonal beam in the OBS with respect to the channel measurement signal, thereby performing beam training on the orthogonal beam in the OBS; at S4, the user equipment reports information about the serial number of the D-OBS and a channel state feedback signal of the D-OBS (e.g., CRI of the D-OBS, amplitude and phase information of the channel state feedback signal) to the electronic device 100; at S5, the electronic device 100 selects an optimal transmission beam from the transmission beam set based on the reported information of the user equipment; at S6, the electronic device 100 performs channel estimation and user scheduling; at S7, the electronic device 100 transmits the DMRS and downlink data through the selected optimal transmission beam.

As an example, the orthogonal beam set is derived based on an orthogonal beam generated by a planar antenna array associated with the electronic device 100 in a direction parallel to the array and an orthogonal beam generated by the planar antenna array in a direction perpendicular to the array.

Fig. 9 shows a schematic diagram of orthogonal beam sets with a planar antenna array (UPA) in accordance with an embodiment of the present disclosure.

Assume that M is associated with electronic device 100_y×M_xUPA of (1), providing O_s,yM_y×O_s,xM_xA transmission beam of O_s,yAnd O_s,xVertical and horizontal oversampling ratios, respectively. The UPA may provide M in the vertical direction_yA orthogonal beam denoted by b_y,i,1≤i≤M_y(ii) a The horizontal direction can provide M_xA orthogonal beam denoted by b_x,j,1≤j≤M_x. Then

Can be used as OBS under UPA, wherein

Representing the kronecker product.

Each transmit beam f may be represented by equation (19) as follows:

in equation (19), α_y,i、α_x,jAnd alpha_i,jIs a projection coefficient vector.

As an example, at least a portion of the orthogonal set of beams produced by the antenna array associated with the electronic device 100 is configured by an antenna port.

In the above, the number of antennas on the electronic apparatus 100 side is M and the number of beams in the OBS is M. It is assumed that K different antenna ports can be configured with K orthogonal beams for beam training, where K is a positive integer. When K is larger than or equal to M, M orthogonal beams can be selected from the K orthogonal beams to be used as the OBS for beam training. When K < M, a complete OBS including M orthogonal beams cannot be selected, only K orthogonal beams can be selected as a subset of OBSs for beam training, or M/K (where M/K is a positive integer) orthogonal beams can be configured in a time-sharing manner for beam training for each antenna port, so that a group of OBSs including M orthogonal beams can be configured for beam training for K antenna ports.

Assuming a uniform linear array configuration M-16 antennas, the oversampling ratio O _s4. A millimeter-wave line-of-sight channel is adopted, ideal non-quantized phase information feedback is assumed, and 1000 times of random distribution simulation experiments of the electronic device 100 are performed. Hereinafter, the results of the above simulation experiment are given. Hereinafter, the simulation results generated under the above-described specific simulation conditions are described with reference to L ≧ 4 in FIGS. 10 through 12.

Fig. 10 shows reference signal received power (with r in equation (6)) for a transmit beam of a transmit beam set according to an embodiment of the disclosure_nCorresponds to the amplitude of (b), marked "OBS" in fig. 10) and the estimated reference signal received power of the transmit beam (as in equation (10)

Corresponds to the amplitude of (D-OBS) in fig. 10) as a function of the number of (predetermined number L) of at least a portion of the orthogonal beams.

As can be seen from the above description, r_nIs calculated based on the channel state feedback signal of the OBS (based on the result of the beam training of the OBS) fed back by the user,

based on user feedbackIs calculated based on the result of the beam training of the D-OBS. This is caused by the fact that channel state feedback signals for orthogonal beams in the OBS that do not belong to the D-OBS are not fed back to the electronic device 100

Less than r_nAs can be seen from fig. 10, the estimated reference signal received power of the transmit beam is less than the reference signal received power of the transmit beam. As L increases, the gap between the estimated reference signal received power of the transmit beam and the reference signal received power decreases. In particular, when L.gtoreq.4, the gap becomes very small.

Fig. 11 shows a simulation plot of the beam false selection rate of the optimal transmit beam as a function of L, according to an embodiment of the disclosure. For example, when the sequence number of the estimated optimal transmission beam in equation (11)

Not equal to the number n of the optimal transmit beam in equation (7)_oWhen this happens, a mis-selection of the optimal transmit beam occurs. As can be seen from FIG. 11, the beam misselection rate decreases rapidly as L increases, and particularly when L ≧ 4, the beam misselection rate is very low. In particular, when L is 4,

it is illustrated that even when a mis-selection occurs, the electronic device 100 selects a beam adjacent to the optimal transmit beam such that the beam mis-selection has less impact on the beamforming gain.

FIG. 12 illustrates estimated relative error of a channel according to an embodiment of the disclosure

Simulation graph as a function of L. Where h is a physical downlink channel vector estimated according to equation (15), an

Is a physical downlink channel vector estimated according to equation (16). Hypothesis of apparent distanceThe channel is dominant and there are 3 non-line-of-sight paths. When L.gtoreq.4, ε is very small. As shown in table 1, the channel estimation error is very stable for different M when L ═ 4.

M	ε
		16	0.207
32	0.224
		64	0.244
128	0.245

TABLE 1

According to another aspect of the present disclosure, there is also provided an electronic device for wireless communication on a user equipment side.

Fig. 13 shows a functional block diagram of an electronic device 1300 for wireless communication according to an embodiment of the present disclosure, as shown in fig. 13, the electronic device 1300 includes: a receiving unit 1302, which may be configured to receive channel measurement signals transmitted by a base station through an orthogonal beam set of a transmit beam set for communicating with an electronic device; and a second processing unit 1304, which may be configured to report channel state feedback signals of at least a part of the orthogonal beams in the orthogonal beam set with respect to the channel measurement signals to the base station for the base station to select at least a part of the transmit beams from the transmit beam set for communication with the electronic device.

Therein, the receiving unit 1302 and the second processing unit 1304 may be implemented by one or more processing circuits, which may be implemented as chips, for example.

The electronic device 1300 may be disposed on a User Equipment (UE) side or communicatively connected to a UE, for example. Here, it is also noted that the electronic device 1300 may be implemented at the chip level, or may also be implemented at the device level. For example, the electronic device 1300 may operate as the user device itself, and may also include external devices such as memory, transceivers (not shown in the figures), and so on. The memory may be used to store programs and related data information that the user device needs to perform to implement various functions. The transceiver may include one or more communication interfaces to support communication with different devices (e.g., base stations, other user equipment, etc.), and implementations of the transceiver are not particularly limited herein.

Examples of the transmit beam set, the orthogonal beam set, the channel measurement signal, and the channel state feedback signal may be referred to the description of the corresponding parts of the electronic device 100, and will not be described herein in a repeated manner.

After receiving the above-described channel measurement signal from the base station, the electronic apparatus 1300 measures a channel state feedback signal of each orthogonal beam in the orthogonal beam set with respect to the channel measurement signal (i.e., the electronic apparatus 1300 measures a channel state feedback signal obtained through each orthogonal beam), thereby obtaining a beam training result of beam training for the orthogonal beam in the orthogonal beam set.

The electronic device 1300 according to the embodiment of the present disclosure only needs to perform beam training on beams in the orthogonal beam set, and does not need to perform beam training on all transmission beams in the transmission beam set, so that the overhead of beam training can be effectively reduced; in addition, the electronic device 1300 only needs to report (feed back) the channel state feedback signals of a part of orthogonal beams with respect to the channel measurement signals to the base station, and does not need to send the channel state feedback signals of all the transmission beams in the beam set with respect to the channel measurement signals to the base station, so that the feedback overhead of beam training can be effectively reduced.

Examples of synthesizing each transmit beam in the transmit beam set in relation to linear combinations of orthogonal beams in the orthogonal beam set may be found in the description of the corresponding parts of the electronic device 100 (e.g., in relation to equations (2) and (3)), and will not be reiterated here.

As an example, the channel state feedback signal includes phase information.

Examples of phase information about the channel state feedback signal may be found in the description of the corresponding parts of the electronic device 100 (e.g., about equation (4)), which will not be reiterated here.

As an example, the second processing unit 1304 may be configured to order the beams in the orthogonal beam set in descending order of the amplitude of the channel state feedback signal and select a predetermined number of beams starting with the largest amplitude as at least a portion of the orthogonal beams.

Examples of forming at least a portion of orthogonal beams may be found in the description of corresponding portions of electronic device 100 (e.g., regarding equations (8) and (9)), and will not be reiterated here.

As an example, the second processing unit 1304 may be configured to receive the above-mentioned predetermined number notified by the base station to the electronic device 1300.

As an example, the second processing unit 1304 may be configured to report phase information to the base station with a relative phase between phases of channel state feedback signals corresponding to orthogonal beams of at least a portion of the orthogonal beams. Thereby, the phase feedback overhead can be reduced.

Examples of relative phases may be found in the description of corresponding portions of the electronic device 100 (e.g., regarding equations (12) - (14)), and will not be reiterated here.

As an example, the second processing unit 1304 may be configured to quantize the relative phase with a different number of quantization bits.

As an example, the second processing unit 1304 may be configured to increase the number of quantization bits for the relative phase of the orthogonal beams as the amplitude of the channel state feedback signal for the orthogonal beam of the at least a portion of the orthogonal beams is increased.

As an example, the orthogonal beam set is derived based on orthogonal beams generated by a planar antenna array of the base station in a direction parallel to the array and orthogonal beams generated by a planar antenna array in a direction perpendicular to the array.

Examples regarding forming orthogonal beams in the case of a planar antenna array may be found in the description of the corresponding parts of the electronic device 100 (e.g., regarding equation (19)), and will not be reiterated here.

According to another aspect of the present disclosure, there is also provided an electronic device for wireless communication on a base station side.

Fig. 14 shows a functional block diagram of an electronic device 1400 for wireless communication according to one embodiment of the present disclosure, as shown in fig. 14, the electronic device 1400 includes: a transmit beam information unit 1402, which may be configured to transmit information to the user equipment regarding an orthogonal beam set of a transmit beam set for the electronic device to communicate with the user equipment; a transmit measurement signal unit 1404, which may be configured to transmit a channel measurement signal to the user equipment through the orthogonal beam set; and a third processing unit 1406, which may be configured to receive information about at least a part of the transmit beams from the user equipment for communication with the user equipment, wherein the user equipment selects at least a part of the transmit beams from the set of transmit beams based on channel state feedback signals of orthogonal beams of the set of orthogonal beams with respect to the channel measurement signals.

The transmit beam information unit 1402, the transmit measurement signal unit 1404, and the third processing unit 1406 may be implemented by one or more processing circuits, which may be implemented as a chip, for example.

The electronic device 1400 may be provided on the base station side or communicatively connected to a base station, for example. Here, it is also noted that the electronic device 1400 may be implemented at a chip level, or may also be implemented at a device level. For example, the electronic device 1400 may operate as the base station itself, and may also include external devices such as memory, transceivers (not shown), and so forth. The memory may be used to store programs and related data information that the base station needs to perform to implement various functions. The transceiver may include one or more communication interfaces to support communication with different devices (e.g., user equipment, other base stations, etc.), and implementations of the transceiver are not particularly limited herein.

Examples of transmit beam sets, Orthogonal Beam Sets (OBS), channel measurement signals, and channel state feedback signals may be found in the description of the corresponding portions of the electronic device 100 and will not be repeated here.

In this embodiment, it is assumed that the user equipment is notified in advance of a specific mode (for example, a mode including a sequence number of each beam) of the N transmission beams on the electronic equipment 1400 side and various modes of the OBS (there may be a plurality of sets of OBS including M orthogonal beams for the N transmission beams, and thus, there are a plurality of modes of the OBS).

As above, there may be multiple sets of OBSs for the N transmit beams on the side of the electronic device 1400, and the electronic device 1400 may transmit the employed pattern of OBS to the user device. For example, assuming that the electronic device 1400 can provide 4 sets of OBS for beam training, since 4 modes of OBS and specific modes of N transmit beams are known at both the electronic device 1400 and the user equipment side, a mapping relationship with the modes of OBS needs to be established with 2 bits of information.

After the electronic device 1400 transmits the channel measurement signal, the user equipment measures a channel state feedback signal of each orthogonal beam in the orthogonal beam set with respect to the channel measurement signal (i.e., the user equipment measures a channel state feedback signal obtained through each orthogonal beam), thereby obtaining a beam training result for performing beam training on the orthogonal beam in the orthogonal beam set. The user equipment selects at least a part of the transmission beams from the transmission beam set based on the beam training result, and sends information about at least a part of the transmission beams (for example, sequence numbers of the at least a part of the transmission beams) to the electronic equipment 1400 for communication with the electronic equipment 1400, it should be noted that, because the beam selection is performed on the user equipment side based on the beam training result of the orthogonal beam set, the user equipment does not need to feed back the beam training result of the orthogonal beam set to the electronic equipment 1400.

The electronic device 1400 according to the embodiment of the present disclosure only needs to send the channel measurement signal to the user equipment through the orthogonal beam set in the transmission beam set, and does not need to send the channel measurement signal to the user equipment through all the transmission beams in the transmission beam set, so that the overhead of beam training can be effectively reduced; furthermore, the electronic device 1400 receives information of at least a part of the transmit beams determined by beam selection on the user equipment side from the user equipment without the user equipment feeding back the beam training results of the orthogonal beam set to the electronic device 1400, and thus can effectively reduce the feedback overhead of the beam training.

As an example, the third processing unit 1406 may be configured to transmit information on the orthogonal beam sets to the user equipment by broadcasting.

For example, in a case where the electronic device 1400 provides 4 sets of OBS for beam training, the third processing unit 1406 may notify all users in the cell of the OBS mode to be employed (e.g., one of the 4 modes described above) with 2 bits in the cell broadcast information.

For example, the user equipment may also transmit the amplitude of the channel state feedback signal of the selected at least a portion of the transmit beams to the electronic device 1400.

Fig. 15 shows a functional block diagram of an electronic device 1500 for wireless communication according to one embodiment of the present disclosure, as shown in fig. 15, the electronic device 1500 includes: a receive beam information unit 1502, which may be configured to receive information from a base station regarding an orthogonal beam set of a transmit beam set used for the base station to communicate with the electronic device 1500; a receive measurement signal unit 1504 that may be configured to receive a channel measurement signal transmitted by a base station through an orthogonal beam set; and a fourth processing unit 1506, which may be configured to select at least a part of the transmit beams from the transmit beam set for communication with the base station based on channel state feedback signals of the orthogonal beams of the orthogonal beam set with respect to the channel measurement signal.

The receive beam information unit 1502, the receive measurement signal unit 1504 and the fourth processing unit 1506 may be implemented by one or more processing circuits, which may be implemented as a chip, for example.

The electronic device 1500 may be provided on a User Equipment (UE) side or communicatively connected to a UE, for example. Here, it is also noted that the electronic device 1500 may be implemented at a chip level, or may also be implemented at a device level. For example, the electronic device 1500 may operate as the user device itself, and may also include external devices such as memory, transceivers (not shown in the figures), and so forth. The memory may be used to store programs and related data information that the user device needs to perform to implement various functions. The transceiver may include one or more communication interfaces to support communication with different devices (e.g., base stations, other user equipment, etc.), and implementations of the transceiver are not particularly limited herein.

In this embodiment, it is assumed that the electronic apparatus 1500 is notified in advance of the specific modes of the N transmission beams and the various modes of the OBS on the base station side.

There may be multiple sets of OBS for the N transmit beams on the base station side, and the electronic device 1500 may receive the pattern of OBS employed by the base station from the base station. For example, assuming that the base station can provide 4 sets of OBS for beam training, since 4 modes of OBS and specific modes of N transmit beams are known at both the base station and the electronic device 1500 side, a mapping relationship with the modes of OBS needs to be established with 2-bit information.

After receiving the above-described channel measurement signal from the base station, the electronic apparatus 1500 measures a channel state feedback signal of each orthogonal beam in the orthogonal beam set with respect to the channel measurement signal (i.e., the electronic apparatus 1500 measures a channel state feedback signal obtained through each orthogonal beam), thereby obtaining a beam training result of beam training by the orthogonal beam in the orthogonal beam set. It should be noted that, because the electronic device 1500 performs beam selection based on the beam training results of the orthogonal beam set, the electronic device 1500 does not need to feed back the beam training results of the orthogonal beam set to the base station, and the electronic device 1500 selects at least a part of the transmission beams from the transmission beam set and sends information about at least a part of the transmission beams (for example, sequence numbers of the at least part of the transmission beams) to the base station for communication with the base station.

The electronic device 1500 according to the embodiment of the present disclosure only needs to perform beam training on beams in the orthogonal beam set, and does not need to perform beam training on all transmission beams in the transmission beam set, so that the overhead of beam training can be effectively reduced; furthermore, the electronic device 1500 does not need to feed back the beam training results of the orthogonal beam set to the base station, but determines at least a part of the transmission beams by performing beam selection based on the beam training results of the orthogonal beam set on the electronic device 1500 side, so that the feedback overhead of beam training can be effectively reduced.

In the above description of the electronic device for wireless communication in the embodiments, it is apparent that some processes or methods are also disclosed. In the following, a summary of the methods is given without repeating some details that have been discussed above, but it should be noted that although the methods are disclosed in the description of electronic devices for wireless communication, the methods do not necessarily employ or be performed by those components described. For example, embodiments of an electronic device for wireless communication may be partially or completely implemented using hardware and/or firmware, while the methods for wireless communication discussed below may be completely implemented by computer-executable programs, although the methods may also employ hardware and/or firmware of an electronic device for wireless communication.

Fig. 16 shows a flowchart of a method S1600 for wireless communication according to one embodiment of the present disclosure. Method S1600 begins with step S1602. In step S1604, a channel measurement signal is transmitted to the user equipment through an orthogonal beam set among the transmit beam sets used for communication with the user equipment. In step S1606, at least a portion of transmission beams from the transmission beam set is selected according to a channel state feedback signal of at least a portion of orthogonal beams in the orthogonal beam set reported by the user equipment with respect to the channel measurement signal, so as to be used for communication with the user equipment. The method S1600 ends at step S1608. The method S1600 may be performed at the base station side.

The method may be performed by the electronic device 100 described in the above embodiments, and specific details thereof may be referred to the description of the corresponding location above, and are not repeated here.

Fig. 17 shows a flowchart of a method S1700 for wireless communication according to one embodiment of the present disclosure. The method S1700 starts at step S1702. In step S1704, a channel measurement signal transmitted by the base station through an orthogonal beam set among the transmission beam sets for communication with the electronic device is received. In step S1706, a channel state feedback signal of at least a portion of the orthogonal beams in the orthogonal beam set with respect to the channel measurement signal is reported to the base station, so that the base station selects at least a portion of the transmission beams from the transmission beam set for communicating with the electronic device. The method S1700 ends at step S1708. The method S1700 may be performed at the UE side.

The method may be performed by the electronic device 1300 described in the above embodiments, and specific details thereof may be referred to the description of the corresponding location above, and are not repeated here.

Fig. 18 shows a flowchart of a method S1800 for wireless communication according to one embodiment of the present disclosure. Method S1800 begins at step S1802. In step S1804, information is transmitted to the user equipment about an orthogonal beam set among the transmit beam sets used for the electronic device to communicate with the user equipment. In step S1806, a channel measurement signal is transmitted to the user equipment through the orthogonal beam set. In step S1808, information on at least a portion of the transmit beams is received from the user equipment for communication with the user equipment, wherein the user equipment selects at least a portion of the transmit beams from the transmit beam set based on a channel state feedback signal of orthogonal beams of the orthogonal beam set with respect to the channel measurement signal. Method S1800 ends at step S1810. The method S1800 may be performed at the base station side.

The method may be performed by the electronic device 1400 described in the above embodiments, and specific details thereof may be referred to the description of the corresponding location above, and are not repeated here.

Fig. 19 shows a flowchart of a method S1900 for wireless communication according to one embodiment of the present disclosure. Method S1900 begins with step S1902. In step S1904, information about an orthogonal beam set among transmission beam sets used for the base station to communicate with the electronic device is received from the base station. In step S1906, a channel measurement signal transmitted by the base station through the orthogonal beam set is received. In step S1908, at least a portion of the transmit beams from the transmit beam set are selected for communication with the base station based on channel state feedback signals of the orthogonal beams in the orthogonal beam set with respect to the channel measurement signal. Method S1900 ends in step S1910. The method S1900 may be performed at the UE side.

The method may be performed by the electronic device 1500 described in the above embodiments, for example, and specific details thereof may be referred to the description of the corresponding positions above, which is not repeated here.

Note that the above-described respective methods may be used in combination or individually.

The techniques of this disclosure can be applied to a variety of products.

For example, electronic device 1300 and electronic device 1500 may be implemented as various user devices. The user equipment may be implemented as a mobile terminal such as a smart phone, a tablet Personal Computer (PC), a notebook PC, a portable game terminal, a portable/cryptographic dog-type mobile router, and a digital camera, or a vehicle-mounted terminal such as a car navigation apparatus. The user equipment may also be implemented as a terminal (also referred to as a Machine Type Communication (MTC) terminal) that performs machine-to-machine (M2M) communication. Further, the user equipment may be a wireless communication module (such as an integrated circuit module including a single chip) mounted on each of the above-described terminals.

For example, electronic device 100 and electronic device 1400 may be implemented as various base stations. The base station may be implemented as any type of evolved node b (enb) or gNB (5G base station). The enbs include, for example, macro enbs and small enbs. The small eNB may be an eNB that covers a cell smaller than a macro cell, such as a pico eNB, a micro eNB, and a home (femto) eNB. Similar scenarios are also possible for the gNB. Alternatively, the base station may be implemented as any other type of base station, such as a NodeB and a Base Transceiver Station (BTS). The base station may include: a main body (also referred to as a base station apparatus) configured to control wireless communication; and one or more Remote Radio Heads (RRHs) disposed at a different place from the main body. In addition, various types of user equipment can operate as a base station by temporarily or semi-persistently performing the function of the base station.

[ application example with respect to base station ]

(first application example)

Fig. 20 is a block diagram illustrating a first example of a schematic configuration of an eNB or a gNB to which the techniques of this disclosure may be applied. Note that the following description takes an eNB as an example, but may be applied to a gNB as well. eNB 800 includes one or more antennas 810 and base station equipment 820. The base station device 820 and each antenna 810 may be connected to each other via an RF cable.

Each of the antennas 810 includes a single or multiple antenna elements, such as multiple antenna elements included in a multiple-input multiple-output (MIMO) antenna, and is used for the base station apparatus 820 to transmit and receive wireless signals. As shown in fig. 20, eNB 800 may include multiple antennas 810. For example, the multiple antennas 810 may be compatible with multiple frequency bands used by the eNB 800. Although fig. 20 shows an example in which the eNB 800 includes multiple antennas 810, the eNB 800 may also include a single antenna 810.

The base station device 820 includes a controller 821, a memory 822, a network interface 823, and a wireless communication interface 825.

The controller 821 may be, for example, a CPU or a DSP, and operates various functions of higher layers of the base station apparatus 820. For example, the controller 821 generates a data packet from data in a signal processed by the wireless communication interface 825 and transfers the generated packet via the network interface 823. The controller 821 may bundle data from a plurality of baseband processors to generate a bundle packet, and deliver the generated bundle packet. The controller 821 may have a logic function of performing control as follows: such as radio resource control, radio bearer control, mobility management, admission control and scheduling. The control may be performed in connection with a nearby eNB or core network node. The memory 822 includes a RAM and a ROM, and stores programs executed by the controller 821 and various types of control data (such as a terminal list, transmission power data, and scheduling data).

The network interface 823 is a communication interface for connecting the base station apparatus 820 to a core network 824. The controller 821 may communicate with a core network node or another eNB via a network interface 823. In this case, the eNB 800 and a core network node or other enbs may be connected to each other through a logical interface, such as an S1 interface and an X2 interface. The network interface 823 may also be a wired communication interface or a wireless communication interface for a wireless backhaul. If the network interface 823 is a wireless communication interface, the network interface 823 may use a higher frequency band for wireless communication than the frequency band used by the wireless communication interface 825.

The wireless communication interface 825 supports any cellular communication scheme, such as Long Term Evolution (LTE) and LTE-advanced, and provides wireless connectivity to terminals located in the cell of the eNB 800 via the antenna 810. The wireless communication interface 825 may generally include, for example, a baseband (BB) processor 826 and RF circuitry 827. The BB processor 826 may perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and perform various types of signal processing of layers such as L1, Medium Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP). The BB processor 826 may have a part or all of the above-described logic functions in place of the controller 821. The BB processor 826 may be a memory storing a communication control program, or a module including a processor configured to execute a program and related circuitry. The update program may cause the function of the BB processor 826 to change. The module may be a card or blade that is inserted into a slot of the base station device 820. Alternatively, the module may be a chip mounted on a card or blade. Meanwhile, the RF circuit 827 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive a wireless signal via the antenna 810.

As shown in fig. 20, wireless communication interface 825 may include a plurality of BB processors 826. For example, the plurality of BB processors 826 may be compatible with the plurality of frequency bands used by the eNB 800. As shown in fig. 20, wireless communication interface 825 may include a plurality of RF circuits 827. For example, the plurality of RF circuits 827 may be compatible with a plurality of antenna elements. Although fig. 20 shows an example in which the wireless communication interface 825 includes a plurality of BB processors 826 and a plurality of RF circuits 827, the wireless communication interface 825 may include a single BB processor 826 or a single RF circuit 827.

In the eNB 800 shown in fig. 20, the transceivers of the electronic device 100 and the electronic device 1400 described with reference to fig. 1 and 14, respectively, may be implemented by the wireless communication interface 825. At least a portion of the functionality may also be implemented by the controller 821. For example, the controller 821 may select at least a portion of a transmission beam from the transmission beam set according to a channel state feedback signal of at least a portion of the orthogonal beams in the orthogonal beam set reported by the user equipment with respect to the channel measurement signal by performing the functions of the first processing unit 104 described above with reference to fig. 1, and receive information about at least a portion of a transmission beam from the user equipment for communication with the user equipment by performing the functions of the third processing unit 1406 described above with reference to fig. 14.

(second application example)

Fig. 21 is a block diagram illustrating a second example of a schematic configuration of an eNB or a gNB to which the techniques of this disclosure may be applied. Note that similarly, the following description takes the eNB as an example, but may be equally applied to the gbb. eNB 830 includes one or more antennas 840, base station equipment 850, and RRHs 860. The RRH 860 and each antenna 840 may be connected to each other via an RF cable. The base station apparatus 850 and RRH 860 may be connected to each other via a high-speed line such as a fiber optic cable.

Each of the antennas 840 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the RRH 860 to transmit and receive wireless signals. As shown in fig. 21, the eNB 830 may include multiple antennas 840. For example, the multiple antennas 840 may be compatible with multiple frequency bands used by the eNB 830. Although fig. 21 shows an example in which the eNB 830 includes multiple antennas 840, the eNB 830 may also include a single antenna 840.

Base station apparatus 850 comprises a controller 851, memory 852, network interface 853, wireless communication interface 855, and connection interface 857. The controller 851, the memory 852, and the network interface 853 are the same as the controller 821, the memory 822, and the network interface 823 described with reference to fig. 20.

The wireless communication interface 855 supports any cellular communication scheme (such as LTE and LTE-advanced) and provides wireless communication via the RRH 860 and the antenna 840 to terminals located in a sector corresponding to the RRH 860. The wireless communication interface 855 may generally include, for example, the BB processor 856. The BB processor 856 is identical to the BB processor 826 described with reference to fig. 20, except that the BB processor 856 is connected to the RF circuit 864 of the RRH 860 via a connection interface 857. As shown in fig. 21, wireless communication interface 855 may include a plurality of BB processors 856. For example, the plurality of BB processors 856 may be compatible with the plurality of frequency bands used by the eNB 830. Although fig. 21 shows an example in which the wireless communication interface 855 includes multiple BB processors 856, the wireless communication interface 855 may include a single BB processor 856.

Connection interface 857 is an interface for connecting base station apparatus 850 (wireless communication interface 855) to RRH 860. Connection interface 857 may also be a communication module for communication in the above-described high-speed line that connects base station apparatus 850 (wireless communication interface 855) to RRH 860.

RRH 860 includes connection interface 861 and wireless communication interface 863.

The connection interface 861 is an interface for connecting the RRH 860 (wireless communication interface 863) to the base station apparatus 850. The connection interface 861 may also be a communication module for communication in the above-described high-speed line.

Wireless communication interface 863 transmits and receives wireless signals via antenna 840. The wireless communication interface 863 can generally include, for example, RF circuitry 864. The RF circuit 864 may include, for example, mixers, filters, and amplifiers, and transmits and receives wireless signals via the antenna 840. As shown in fig. 21, wireless communication interface 863 can include a plurality of RF circuits 864. For example, the plurality of RF circuits 864 may support a plurality of antenna elements. Although fig. 21 shows an example in which the wireless communication interface 863 includes multiple RF circuits 864, the wireless communication interface 863 may include a single RF circuit 864.

In the eNB 830 shown in fig. 21, the transceivers of the electronic device 100 and the electronic device 1400 described with reference to fig. 1 and 14, respectively, may be implemented by a wireless communication interface 855. At least a portion of the functionality may also be implemented by the controller 851. For example, the controller 851 may select at least a portion of the transmission beams from the transmission beam set according to the channel state feedback signal of at least a portion of the orthogonal beams in the orthogonal beam set reported by the user equipment with respect to the channel measurement signal by performing the functions of the first processing unit 104 described above with reference to fig. 1, and receive information about at least a portion of the transmission beams from the user equipment for communication with the user equipment by performing the functions of the third processing unit 1406 described above with reference to fig. 14.

[ application example with respect to user Equipment ]

(first application example)

Fig. 22 is a block diagram illustrating an example of a schematic configuration of a smartphone 900 to which the technology of the present disclosure may be applied. The smartphone 900 includes a processor 901, memory 902, storage 903, an external connection interface 904, a camera 906, a sensor 907, a microphone 908, an input device 909, a display device 910, a speaker 911, a wireless communication interface 912, one or more antenna switches 915, one or more antennas 916, a bus 917, a battery 918, and an auxiliary controller 919.

The processor 901 may be, for example, a CPU or a system on a chip (SoC), and controls functions of an application layer and another layer of the smartphone 900. The memory 902 includes a RAM and a ROM, and stores data and programs executed by the processor 901. The storage 903 may include a storage medium such as a semiconductor memory and a hard disk. The external connection interface 904 is an interface for connecting an external device such as a memory card and a Universal Serial Bus (USB) device to the smartphone 900.

The image pickup device 906 includes an image sensor such as a Charge Coupled Device (CCD) and a Complementary Metal Oxide Semiconductor (CMOS), and generates a captured image. The sensor 907 may include a set of sensors such as a measurement sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 908 converts sound input to the smartphone 900 into an audio signal. The input device 909 includes, for example, a touch sensor, a keypad, a keyboard, a button, or a switch configured to detect a touch on the screen of the display device 910, and receives an operation or information input from a user. The display device 910 includes a screen, such as a Liquid Crystal Display (LCD) and an Organic Light Emitting Diode (OLED) display, and displays an output image of the smart phone 900. The speaker 911 converts an audio signal output from the smart phone 900 into sound.

The wireless communication interface 912 supports any cellular communication scheme (such as LTE and LTE-advanced) and performs wireless communication. The wireless communication interface 912 may generally include, for example, a BB processor 913 and RF circuitry 914. The BB processor 913 can perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 914 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives a wireless signal via the antenna 916. Note that although the figure shows a case where one RF chain is connected to one antenna, this is merely illustrative and includes a case where one RF chain is connected to a plurality of antennas through a plurality of phase shifters. The wireless communication interface 912 may be one chip module on which the BB processor 913 and the RF circuit 914 are integrated. As shown in fig. 22, the wireless communication interface 912 may include a plurality of BB processors 913 and a plurality of RF circuits 914. Although fig. 22 shows an example in which the wireless communication interface 912 includes a plurality of BB processors 913 and a plurality of RF circuits 914, the wireless communication interface 912 may also include a single BB processor 913 or a single RF circuit 914.

Further, the wireless communication interface 912 may support another type of wireless communication scheme, such as a short-range wireless communication scheme, a near field communication scheme, and a wireless Local Area Network (LAN) scheme, in addition to the cellular communication scheme. In this case, the wireless communication interface 912 may include a BB processor 913 and an RF circuit 914 for each wireless communication scheme.

Each of the antenna switches 915 switches a connection destination of the antenna 916 among a plurality of circuits (for example, circuits for different wireless communication schemes) included in the wireless communication interface 912.

Each of the antennas 916 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the wireless communication interface 912 to transmit and receive wireless signals. As shown in fig. 22, the smart phone 900 may include multiple antennas 916. Although fig. 22 shows an example in which the smartphone 900 includes multiple antennas 916, the smartphone 900 may also include a single antenna 916.

Further, the smartphone 900 may include an antenna 916 for each wireless communication scheme. In this case, the antenna switch 915 may be omitted from the configuration of the smart phone 900.

The bus 917 connects the processor 901, the memory 902, the storage device 903, the external connection interface 904, the image pickup device 906, the sensor 907, the microphone 908, the input device 909, the display device 910, the speaker 911, the wireless communication interface 912, and the auxiliary controller 919 to each other. The battery 918 provides power to the various blocks of the smartphone 900 shown in fig. 22 via a feed line, which is partially shown in the figure as a dashed line. The auxiliary controller 919 operates the minimum necessary functions of the smartphone 900, for example, in a sleep mode.

In the smartphone 900 shown in fig. 22, the transceivers of the electronic device 1300 and the electronic device 1500 described with reference to fig. 13 and 15, respectively, may be implemented by the wireless communication interface 912. At least a portion of the functionality may also be implemented by the processor 901 or the secondary controller 919. For example, the processor 901 or the secondary controller 919 may report channel state feedback signals of at least a portion of orthogonal beams in the orthogonal beam set with respect to the channel measurement signal to the base station by performing the functions of the second processing unit 1304 described above with reference to fig. 13, and select at least a portion of transmission beams from the transmission beam set based on the channel state feedback signals of the orthogonal beams in the orthogonal beam set with respect to the channel measurement signal by performing the functions of the fourth processing unit 1506 described above with reference to fig. 15.

(second application example)

Fig. 23 is a block diagram showing an example of a schematic configuration of a car navigation device 920 to which the technique of the present disclosure can be applied. The car navigation device 920 includes a processor 921, memory 922, a Global Positioning System (GPS) module 924, sensors 925, a data interface 926, a content player 927, a storage medium interface 928, an input device 929, a display device 930, a speaker 931, a wireless communication interface 933, one or more antenna switches 936, one or more antennas 937, and a battery 938.

The processor 921 may be, for example, a CPU or an SoC, and controls a navigation function and another function of the car navigation device 920. The memory 922 includes a RAM and a ROM, and stores data and programs executed by the processor 921.

The GPS module 924 measures the position (such as latitude, longitude, and altitude) of the car navigation device 920 using GPS signals received from GPS satellites. The sensors 925 may include a set of sensors such as a gyro sensor, a geomagnetic sensor, and an air pressure sensor. The data interface 926 is connected to, for example, an in-vehicle network 941 via a terminal not shown, and acquires data generated by a vehicle (such as vehicle speed data).

The content player 927 reproduces content stored in a storage medium (such as a CD and a DVD) inserted into the storage medium interface 928. The input device 929 includes, for example, a touch sensor, a button, or a switch configured to detect a touch on the screen of the display device 930, and receives an operation or information input from a user. The display device 930 includes a screen such as an LCD or OLED display, and displays an image of a navigation function or reproduced content. The speaker 931 outputs the sound of the navigation function or the reproduced content.

The wireless communication interface 933 supports any cellular communication scheme (such as LTE and LTE-advanced), and performs wireless communication. Wireless communication interface 933 may generally include, for example, BB processor 934 and RF circuitry 935. The BB processor 934 may perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 935 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive a wireless signal via the antenna 937. The wireless communication interface 933 may also be one chip module with the BB processor 934 and the RF circuitry 935 integrated thereon. As shown in fig. 23, a wireless communication interface 933 may include a plurality of BB processors 934 and a plurality of RF circuits 935. Although fig. 23 shows an example in which the wireless communication interface 933 includes multiple BB processors 934 and multiple RF circuits 935, the wireless communication interface 933 may also include a single BB processor 934 or a single RF circuit 935.

Further, the wireless communication interface 933 may support another type of wireless communication scheme, such as a short-range wireless communication scheme, a near field communication scheme, and a wireless LAN scheme, in addition to the cellular communication scheme. In this case, the wireless communication interface 933 may include a BB processor 934 and RF circuitry 935 for each wireless communication scheme.

Each of the antenna switches 936 switches a connection destination of the antenna 937 among a plurality of circuits (such as circuits for different wireless communication schemes) included in the wireless communication interface 933.

Each of the antennas 937 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna), and is used for the wireless communication interface 933 to transmit and receive wireless signals. As shown in fig. 23, the car navigation device 920 may include a plurality of antennas 937. Although fig. 23 shows an example in which the car navigation device 920 includes a plurality of antennas 937, the car navigation device 920 may include a single antenna 937.

Further, the car navigation device 920 may include an antenna 937 for each wireless communication scheme. In this case, the antenna switch 936 may be omitted from the configuration of the car navigation device 920.

The battery 938 supplies power to the various blocks of the car navigation device 920 shown in fig. 23 via a feed line, which is partially shown as a dashed line in the figure. The battery 938 accumulates electric power supplied from the vehicle.

In the car navigation device 920 shown in fig. 23, the transceivers of the electronic device 1300 and the electronic device 1500 described with reference to fig. 13 and 15, respectively, may be implemented by the wireless communication interface 933. At least a portion of the functionality may also be implemented by the processor 921. For example, the processor 921 may report a channel state feedback signal of at least a part of the orthogonal beams in the orthogonal beam set with respect to the channel measurement signal to the base station by performing the function of the second processing unit 1304 described above with reference to fig. 13, and select at least a part of the transmission beams from the transmission beam set based on the channel state feedback signal of the orthogonal beams in the orthogonal beam set with respect to the channel measurement signal by performing the function of the fourth processing unit 1506 described above with reference to fig. 15.

The techniques of this disclosure may also be implemented as an in-vehicle system (or vehicle) 940 including one or more blocks of a car navigation device 920, an in-vehicle network 941, and a vehicle module 942. The vehicle module 942 generates vehicle data (such as vehicle speed, engine speed, and failure information) and outputs the generated data to the on-vehicle network 941.

While the basic principles of the invention have been described in connection with specific embodiments thereof, it should be noted that it will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, using the basic circuit design knowledge or basic programming skills of those skilled in the art after reading the description of the invention.

Moreover, the invention also provides a program product which stores the machine-readable instruction codes. The instruction codes, when read and executed by a machine, may perform the methods according to embodiments of the invention described above.

Accordingly, a storage medium carrying the above-described program product having machine-readable instruction code stored thereon is also included in the present disclosure. Storage media includes, but is not limited to, floppy disks, optical disks, magneto-optical disks, memory cards, memory sticks, and the like.

In the case where the present invention is implemented by software or firmware, a program constituting the software is installed from a storage medium or a network to a computer (for example, a general-purpose computer 2400 shown in fig. 24) having a dedicated hardware configuration, and the computer can execute various functions and the like when various programs are installed.

In fig. 24, a Central Processing Unit (CPU)2401 executes various processes in accordance with a program stored in a Read Only Memory (ROM)2402 or a program loaded from a storage portion 2408 to a Random Access Memory (RAM) 2403. In the RAM 2403, data necessary when the CPU 2401 executes various processes and the like is also stored as necessary. The CPU 2401, ROM 2402, and RAM 2403 are connected to each other via a bus 2404. An input/output interface 2405 is also connected to the bus 2404.

The following components are connected to the input/output interface 2405: an input portion 2406 (including a keyboard, a mouse, and the like), an output portion 2407 (including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker and the like), a storage portion 2408 (including a hard disk and the like), a communication portion 2409 (including a network interface card such as a LAN card, a modem, and the like). The communication section 2409 performs communication processing via a network such as the internet. The driver 2410 may also be connected to the input/output interface 2405 as desired. A removable medium 2411 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 2410 as necessary, so that the computer program read out therefrom is installed into the storage portion 2408 as necessary.

In the case where the series of processes described above is implemented by software, a program constituting the software is installed from a network such as the internet or a storage medium such as the removable medium 2411.

It should be understood by those skilled in the art that such a storage medium is not limited to the removable medium 2411 shown in fig. 24 in which the program is stored, distributed separately from the apparatus to provide the program to the user. Examples of the removable medium 2411 include a magnetic disk (including a floppy disk (registered trademark)), an optical disk (including a compact disk read only memory (CD-ROM) and a Digital Versatile Disk (DVD)), a magneto-optical disk (including a Mini Disk (MD) (registered trademark)), and a semiconductor memory. Alternatively, the storage medium may be the ROM 2402, a hard disk included in the storage portion 2408, or the like, in which programs are stored, and which is distributed to users together with the device including them.

It should also be noted that the components or steps may be broken down and/or re-combined in the apparatus, methods and systems of the present invention. These decompositions and/or recombinations should be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, it should be understood that the above-described embodiments are only for illustrating the present invention and do not constitute a limitation to the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is to be defined only by the claims appended hereto, and by their equivalents.

The present technique can also be implemented as follows.

Supplementary note 1. an electronic device for wireless communication, comprising:

a processing circuit configured to:

transmitting a channel measurement signal to a user equipment through an orthogonal beam set among transmit beam sets for communication with the user equipment; and

selecting at least a portion of transmit beams from the transmit beam set for communication with the user equipment according to channel state feedback signals of the at least a portion of orthogonal beams in the orthogonal beam set with respect to the channel measurement signals reported by the user equipment.

Supplementary note 2 the electronic device according to supplementary note 1, wherein each of the transmission beams in the transmission beam set can be synthesized by a linear combination of orthogonal beams in the orthogonal beam set.

Supplementary note 3 the electronic device according to

supplementary note

1 or 2, wherein the at least a portion of orthogonal beams includes a predetermined number of orthogonal beams from a maximum amplitude in a descending order of amplitudes of the channel state feedback signals in the orthogonal beam set.

Supplementary note 4 the electronic equipment according to supplementary note 3, wherein the processing circuit is configured to notify the user equipment of the predetermined number by downlink control information or broadcast signaling.

Supplementary note 5 the electronic equipment according to any one of supplementary notes 1 to 4, wherein the channel state feedback signal includes phase information.

Supplementary note 6 the electronic device of supplementary note 5, wherein the processing circuitry is configured to receive the phase information reported by the user equipment with a relative phase between phases of orthogonal beams of the at least a portion of orthogonal beams.

Supplementary 7. the electronic equipment according to supplementary 6, wherein the processing circuitry is configured to receive the relative phases quantized by different numbers of quantization bits reported by the user equipment.

Supplementary note 8 the electronic equipment of supplementary note 7, wherein as the amplitude of the channel state feedback signal of an orthogonal beam of the at least a portion of orthogonal beams is larger, the number of quantization bits of the relative phase of the orthogonal beam is larger.

Supplementary note 9 the electronic device according to any of supplementary notes 1 to 8, wherein the processing circuitry is configured to estimate a channel state feedback signal for each of the set of transmission beams with respect to the channel measurement signal based on the channel state feedback signal and to select the at least a part of the transmission beams based on the estimated channel state feedback signal.

Supplementary note 10 the electronic device according to any of supplementary notes 1 to 9, wherein the processing circuitry is configured to estimate information of a channel between the electronic device and the user equipment based on the at least one portion of orthogonal beams and a channel state feedback signal of the at least one portion of orthogonal beams with respect to the channel measurement signal.

Supplementary note 11 the electronic device according to supplementary note 10, wherein the processing circuitry is configured to estimate a channel correlation between a first one of the user devices and a second one of the user devices based on information of the channel corresponding to the first user device and information of the channel corresponding to the second user device, and to schedule the first user device and the second user device based on the channel correlation.

Supplementary note 12. the electronic device according to supplementary note 11, wherein the processing circuitry is configured to schedule the first user equipment and the second user equipment for service within the same time-frequency resource if the channel correlation is less than a predetermined threshold.

Additional note 13. the electronic device of any of additional notes 1 to 9, wherein the processing circuitry is configured to schedule a first one of the user devices and a second one of the user devices for service within the same time-frequency resource if an intersection between the at least a portion of the orthogonal beam corresponding to the first user device and the at least a portion of the orthogonal beam corresponding to the second user device is empty.

Supplementary note 14 the electronic device according to any of supplementary notes 1 to 13, wherein the orthogonal beam set is derived based on an orthogonal beam generated by a planar antenna array associated with the electronic device in a direction parallel to the array and an orthogonal beam generated by the planar antenna array in a direction perpendicular to the array.

Supplementary note 15 the electronic device according to any of supplementary notes 1 to 14, wherein at least a part of the orthogonal set of beams generated by the antenna array associated with the electronic device is configured by means of antenna ports.

Note 16. an electronic device for wireless communication, comprising:

a processing circuit configured to:

receiving channel measurement signals transmitted by a base station through an orthogonal beam set in a transmission beam set for communicating with the electronic equipment; and

reporting, to the base station, a channel state feedback signal of at least a portion of the orthogonal beams in the orthogonal beam set with respect to the channel measurement signal, for the base station to select at least a portion of the transmit beams from the transmit beam set for communication with the electronic device.

Supplementary note 17 the electronic equipment of supplementary note 16, wherein each transmit beam of the set of transmit beams can be synthesized by a linear combination of orthogonal beams of the set of orthogonal beams.

Supplementary note 18. the electronic device according to supplementary note 16 or 17, wherein the processing circuitry is configured to sort the beams of the orthogonal beam set in descending order of the amplitude of the channel state feedback signal and to select a predetermined number of beams starting from the largest amplitude as the at least part of the orthogonal beams.

Supplementary note 19 the electronic device according to supplementary note 18, wherein the processing circuitry is configured to receive the predetermined number notified to the electronic device by the base station.

Supplementary note 20 the electronic equipment according to any one of supplementary notes 16 to 19, wherein the channel state feedback signal includes phase information.

Supplementary note 21, the electronic device of supplementary note 20, wherein the processing circuitry is configured to report the phase information to the base station with a relative phase between phases of the channel state feedback signals corresponding to orthogonal beams of the at least a portion of orthogonal beams.

Supplementary 22 the electronic device according to supplementary 21, wherein the processing circuitry is configured to quantize the relative phase with different numbers of quantization bits.

Supplementary 23. the electronic device according to supplementary 22, wherein the processing circuitry is configured to increase the number of quantization bits for the relative phase of the orthogonal beams as the amplitude of the channel state feedback signal for the orthogonal beams of the at least a portion of the orthogonal beams is increased.

Supplementary note 24 the electronic device of any of supplementary notes 16 to 23, wherein the orthogonal beam set is derived based on an orthogonal beam generated by a planar antenna array of the base station in a direction parallel to the array and an orthogonal beam generated by the planar antenna array in a direction perpendicular to the array.

Supplementary note 25. an electronic device for wireless communication, comprising:

a processing circuit configured to:

transmitting information to a user equipment regarding an orthogonal beam set of a transmit beam set used by the electronic device to communicate with the user equipment;

transmitting a channel measurement signal to the user equipment through the orthogonal beam set; and

receiving information about at least a portion of transmit beams from the user equipment for communicating with the user equipment, wherein the user equipment selects the at least a portion of transmit beams from the set of transmit beams based on channel state feedback signals of orthogonal beams of the set of orthogonal beams with respect to the channel measurement signal.

Reference numeral 26, the electronic device according to reference numeral 25, wherein,

the processing circuitry is configured to transmit information about the orthogonal beam sets to the user equipment by broadcasting.

Supplementary note 27. an electronic device for wireless communication, comprising:

a processing circuit configured to:

receiving information from a base station regarding an orthogonal beam set of a transmit beam set used by the base station to communicate with the electronic device;

receiving a channel measurement signal transmitted by the base station through the orthogonal beam set; and

selecting at least a portion of transmit beams from the transmit beam set for communication with the base station based on channel state feedback signals for orthogonal beams of the orthogonal beam set with respect to the channel measurement signal.

Supplementary note 28. the electronic equipment according to supplementary note 27, wherein,

the processing circuit is configured to report information regarding the selected at least a portion of the transmit beams to the base station.

Supplementary note 29. a method for wireless communication, comprising:

Supplementary note 30. a method for wireless communication, comprising:

Supplementary note 31. a method for wireless communication, comprising:

transmitting information to a user equipment regarding an orthogonal beam set of a transmit beam set for an electronic device to communicate with the user equipment;

Reference 32. a method for wireless communication, comprising:

receiving information from a base station regarding an orthogonal beam set of a set of transmit beams used by the base station to communicate with an electronic device;

Reference 33. a computer-readable storage medium having stored thereon computer-executable instructions that, when executed, perform a method for wireless communication according to any of the references 29 to 32.

Claims

1. An electronic device for wireless communication, comprising:

a processing circuit configured to:

2. The electronic device of claim 1, wherein a linear combination of orthogonal beams in the orthogonal beam set is capable of synthesizing each transmit beam in the transmit beam set.

3. An electronic device for wireless communication, comprising:

a processing circuit configured to:

4. An electronic device for wireless communication, comprising:

a processing circuit configured to:

5. An electronic device for wireless communication, comprising:

a processing circuit configured to:

6. A method for wireless communication, comprising:

7. A method for wireless communication, comprising:

8. A method for wireless communication, comprising:

9. A method for wireless communication, comprising:

10. A computer-readable storage medium having stored thereon computer-executable instructions that, when executed, perform a method for wireless communication according to any one of claims 6 to 9.