CN108401264B

CN108401264B - Beam information feedback method and device

Info

Publication number: CN108401264B
Application number: CN201710067563.6A
Authority: CN
Inventors: 吴昊; 高波; 张楠; 陈艺戬; 鲁照华; 李儒岳
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2017-02-07
Filing date: 2017-02-07
Publication date: 2023-03-24
Anticipated expiration: 2037-02-07
Also published as: CN108401264A; WO2018145630A1

Abstract

The embodiment of the invention discloses a beam information feedback method and a device, wherein the method comprises the following steps: the terminal measures the reference signal and generates a measuring result; based on the measurement result, selecting first type beam information according to a first criterion, selecting second type beam information according to a second criterion, and reporting the first type beam information and the second type beam information to a network side.

Description

Beam information feedback method and device

Technical Field

The invention relates to a beam information feedback method and a beam information feedback device.

Background

The ultra-wide bandwidth high-frequency communication, i.e. millimeter wave communication, becomes an important direction for the development of future mobile communication, and attracts the attention of the global academia and industry. In particular, the advantages of millimeter waves are becoming increasingly attractive when increasingly congested spectrum resources and physical networks are heavily accessed. Many standards organizations, such as the Institute of Electrical and Electronics Engineers (IEEE) and the third Generation Partnership Project (3 GPP), have begun to perform standardization work, and high-frequency communication will become an important innovation point of the New 5G Radio Access Technology (New RAT) due to the significant advantage of its large bandwidth in the 3GPP standard group.

However, high-frequency communication also has the problems of link attenuation, such as large propagation path loss, large air (especially oxygen) absorption, and heavy rain attenuation. In view of the above problems, the high-band communication system can obtain high antenna gain and confrontation signal transmission loss through a multi-antenna array and a beam forming scheme by using the characteristics of short high-band wavelength, easy antenna integration and the like, thereby ensuring link margin and improving communication robustness.

In the process of training the antenna weights (also called precoding and beam), the high-band transmitting end transmits a training pilot, and the receiving end receives signals and performs channel estimation. Then, the high-frequency band receiving end needs to feed back channel state information to the training transmitting end, so that the receiving and transmitting end can conveniently find multiple groups of receiving and transmitting end antenna weight pairs required by multi-path data transmission from the selectable receiving and transmitting end antenna weight pairs, and the overall spectrum efficiency is improved.

In the existing millimeter wave communication system, the beam related information feeds back the beam sequence numbers and the channel quality thereof under the multiple optimal channel qualities to generate corresponding beam pairs for data transmission. However, when the multiplexing gain of transmission needs to be increased, the number of transmission layers needs to be increased to improve the multiplexing gain, so that multiple beam feedbacks are needed to support the transmission of multiple layers, and it is desirable to support the transmission and feedback of multiple layers of beams through multiple antenna panels.

In view of the above problems, no effective solution has been proposed in the prior art.

Disclosure of Invention

In order to solve the above technical problem, embodiments of the present invention provide a method and an apparatus for feeding back beam information.

The technical scheme of the embodiment of the invention is as follows:

the embodiment of the invention provides a beam information feedback method, which comprises the following steps:

the terminal measures the reference signal and generates a measuring result;

based on the measurement result, selecting first type beam information according to a first criterion, selecting second type beam information according to a second criterion, and reporting the first type beam information and the second type beam information to a network side.

the terminal determines a beam information measurement resource set and/or a beam information measurement limiting condition through network side configuration information, measures beam information meeting the beam information measurement limiting condition in the beam information measurement resource set, and reports the beam information meeting the condition to a network side.

and the network side receives beam information reported by the terminal, wherein the beam information comprises first type beam information selected and reported by the terminal according to a first criterion and second type beam information selected and reported according to a second criterion.

and the network side informs the terminal of the beam information measurement resource set and/or the beam information measurement limiting condition through the configuration information.

The embodiment of the invention provides a beam information feedback device, which comprises:

a measurement unit that measures a reference signal and generates a measurement result;

a selecting unit, configured to select first type beam information according to a first criterion and select second type beam information according to a second criterion based on the measurement result;

a reporting unit, configured to report the first type of beam information and the second type of beam information to a network side.

Another beam information feedback device provided in an embodiment of the present invention includes:

the determining unit is used for determining the beam information measurement resource set and/or the beam information measurement limiting condition through the network side configuration information;

a measurement unit, configured to measure beam information that satisfies a beam information measurement restriction condition in the beam information measurement resource set;

and a reporting unit, configured to report the beam information meeting the condition to the network side.

the receiving unit is configured to receive beam information reported by a terminal, where the beam information includes first type beam information selected and reported by the terminal according to a first criterion, and second type beam information selected and reported according to a second criterion.

a notifying unit, configured to notify the terminal of the beam information measurement resource set and/or the beam information measurement restriction condition through the configuration information.

According to the technical scheme of the embodiment of the invention, the base station side configures corresponding reference signal resources for beams between different layers and different panels according to the beam information reported by the terminal, thereby avoiding the beam interference between different layers, further improving the multiplexing gain and the communication quality of a communication system.

Drawings

Fig. 1 is a schematic diagram of a base station configuring reference signal resources for multiple antenna panels and beams according to embodiment 1 of the present invention;

fig. 2 is a schematic diagram illustrating selection of receiving and transmitting beams in embodiment 1 of the present invention;

fig. 3 is a schematic diagram of an example of the beam measurement limitation in embodiment 2 of the present invention;

fig. 4 is a schematic diagram of an antenna configuration of a plurality of terminal panels according to embodiment 3 of the present invention;

fig. 5 is a schematic diagram of a hybrid beamforming process including digital beams and analog beams in embodiment 4 of the present invention;

fig. 6 is a schematic structural diagram of a beam information feedback apparatus according to a first embodiment of the present invention;

fig. 7 is a schematic structural diagram of a beam information feedback apparatus according to a second embodiment of the present invention;

fig. 8 is a schematic structural diagram of a beam information feedback apparatus according to a third embodiment of the present invention;

fig. 9 is a schematic structural diagram of a beam information feedback apparatus according to a fourth embodiment of the present invention.

Detailed Description

So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.

The terminal selects and reports the first type of beam information according to a first criterion and selects and reports the second type of beam information according to a second criterion through the measurement of the reference signal.

Further, the beam information includes at least one of: transmitting beam information; transmitting beam group information; beam information is received.

Further, the first criterion includes at least one of: a maximum reference signal received power; maximum reference signal received quality; greater than a reference signal received power threshold P1; greater than the reference signal received quality threshold Q1.

Further, the second criterion includes at least one of:

a minimum reference signal received power;

a minimum reference signal received quality;

less than a reference signal received power threshold P2;

less than the reference signal received quality threshold Q2.

Further, the selection of the second type of beam information depends on the first type of beam information.

Still further, the second criterion includes at least one of:

the minimum reference signal received power and/or the minimum reference signal received quality corresponding to the received beam information in the first type of beam information, and/or the reference signal received power is less than a threshold P3, and/or the reference signal received quality is less than a threshold Q3;

the minimum reference signal receiving power and/or the minimum reference signal receiving quality corresponding to the sending beam information group in the first type of beam information, and/or the reference signal receiving power is smaller than a threshold P4, and/or the reference signal receiving quality is smaller than a threshold Q4;

the minimum reference signal receiving power corresponding to the channel layer information in the first type of beam information, and/or the minimum reference signal receiving quality, and/or the reference signal receiving power is less than a threshold P5, and/or the reference signal receiving quality is less than a threshold Q5;

the first type of beam information includes K pieces of receiving beam information, and the second criterion is: in a transmitting beam set corresponding to the kth 1 receiving beam information of the first type of beam information, the maximum reference signal receiving power corresponding to the kth 2 receiving beam, and/or the maximum reference signal receiving quality, and/or the reference signal receiving power is greater than a threshold P6, and/or the reference signal receiving quality is greater than a threshold Q6, K1 is not equal to K2, and K1 and K2 are integers greater than or equal to 1 and less than or equal to K;

the first type of beam information includes L pieces of transmission beam group information, and the second criterion is: in a transmitting beam set corresponding to the L1 beam group information of the first type of beam information, the maximum reference signal receiving power corresponding to the L2 beam group, and/or the maximum reference signal receiving quality, and/or the reference signal receiving power is greater than a threshold P7, and/or the reference signal receiving quality is greater than a threshold Q7, L1 is not equal to L2, and L1 and L2 are integers which are greater than or equal to 1 and less than or equal to L;

the first type of beam information comprises M pieces of channel layer information, and the second criterion is as follows: in a transmission beam set corresponding to the M1-layer beam information of the first type of beam information, the maximum reference signal received power corresponding to the M2-layer beam information, and/or the maximum reference signal received quality, and/or the reference signal received power is greater than a threshold P8, and/or the reference signal received quality is greater than a threshold Q8, M1 is not equal to M2, and M1 and M2 are integers greater than or equal to 1 and less than or equal to M.

Further, the transmission beam information in the second type of beam information is a subset of the transmission beam information in the first type of beam information.

Further, the terminal determines the second criterion by at least one of the following signaling, and/or whether to report the second type of beam information, and/or a reference signal received power threshold, and/or a reference signal received quality threshold.

Here, the signaling includes: high layer signaling, physical layer signaling.

As an implementation manner, in the embodiment of the present invention, the terminal determines the beam information measurement resource set and/or the beam information measurement limiting condition through the base station configuration information, and measures and reports beam information satisfying the beam information measurement limiting condition in the beam information measurement resource set.

Further, the beam information measurement resource set configuration information includes at least one of the following information: reference signal frequency domain resource information, reference signal time domain resource information, reference signal port information.

Further, the beam information measurement restriction condition configuration information is at least one of:

maximum channel layer number restriction information.

Each layer and/or the beam information measurement limiting condition corresponding to each beam measurement process;

furthermore, the beam information measurement restriction condition corresponding to each layer and/or each beam measurement process indicates the terminal, and for the report corresponding to the layer and/or the beam measurement process, the beam of the terminal non-measurable report in the beam information measurement resource set;

furthermore, each layer and/or the beam information measurement restriction condition corresponding to each beam measurement process indicates the terminal, and for the report corresponding to the layer and/or the beam measurement process, the beam of the terminal non-measurable report in the active subset of the beam information measurement resource set;

furthermore, the terminal determines the beam information measurement limiting condition according to the beam information measurement resource bit map corresponding to the beam information measurement resource set configured by the base station;

furthermore, the terminal determines the beam information measurement limiting condition according to the beam information measurement resource bitmap corresponding to the activated subset of the beam information measurement resource set configured by the base station;

furthermore, the terminal determines the beam information measurement limiting condition according to the ID of the beam information configured by the base station in the beam information measurement resource set;

further, the terminal determines the beam information measurement restriction condition according to the ID of the beam information configured by the base station in the active subset of the beam information measurement resource set.

Further, the mth layer, and/or, the mth beam measurement process, the corresponding beam information measurement limitation condition depends on the nth layer, and/or, the beam information measurement limitation condition corresponding to the nth beam measurement process, n < m;

further, the mth layer and/or the optional beam resource indicated by the beam limitation condition corresponding to the mth beam measurement process is/are the nth layer and/or the subset of the optional beam resource indicated by the beam limitation condition corresponding to the nth beam measurement process, where n < m further, the terminal determines the beam information measurement resource set according to the configuration information and/or the beam information measurement limitation condition set and determines the reported beam information according to the selected precoding indication information, where the beam information is selected from the beam information measurement resource set and meets the beam information measurement limitation condition set or the subset of the beam information measurement limitation condition set;

furthermore, the precoding indication information selected by the terminal comprises K types, and when the precoding indication information of the kth type is selected, the mth precoding indication information meeting the beam information measurement limiting condition set is selected and reported _k Beam information of a condition in the class subset, where K is a positive integer, K is a positive integer greater than or equal to 1, less than or equal to K, m _k Is a positive integer whose value is related to k.

Further, the K-type precoding indication information at least includes the following two types:

category one: the indicated precoding matrix is precoding indication information of a diagonal matrix;

category two: the indicated precoding matrix is precoding indication information of a non-diagonal matrix.

Furthermore, when the precoding indication information selected by the terminal is of the first category, the selectable beam resource used for reporting the beam information is a subset of the selectable beam resource used for reporting the beam information when the precoding indication information selected by the terminal is of the second category.

Furthermore, when the precoding indication information selected by the terminal is of type two, the terminal selects and reports the beam information from the beam information measurement resource set, and when the precoding indication information selected by the terminal is of type one, the terminal selects and reports the beam information from the beam information measurement resource subset which meets the beam information measurement restriction condition in the beam information measurement resource set.

Further, the terminal determines the set of beam information measurement resources, and/or an active subset of the set of beam information measurement resources, and/or a beam information measurement restriction condition, based on at least one of the following signaling.

Here, the signaling includes: higher layer signaling, MAC signaling, RRC signaling, physical layer signaling.

In the embodiment of the invention, the base station receives the beam information reported by the terminal, and the beam information comprises first type beam information selected and reported by the terminal according to a first criterion and second type beam information selected and reported according to a second criterion.

Further, the second criterion includes at least one of:

a minimum reference signal received power;

a minimum reference signal received quality;

less than a reference signal received power threshold P2;

less than the reference signal received quality threshold Q2.

Still further, the second criterion includes at least one of:

the minimum reference signal receiving power and/or the minimum reference signal receiving quality corresponding to the channel layer information in the first type of beam information, and/or the reference signal receiving power is less than a threshold P5, and/or the reference signal receiving quality is less than a threshold Q5;

the first type of beam information comprises K pieces of receiving beam information, and the second criterion is as follows: in a transmitting beam set corresponding to the kth 1 receiving beam information of the first type of beam information, the maximum reference signal receiving power corresponding to the kth 2 receiving beam, and/or the maximum reference signal receiving quality, and/or the reference signal receiving power is greater than a threshold P6, and/or the reference signal receiving quality is greater than a threshold Q6, K1 is not equal to K2, and K1 and K2 are integers greater than or equal to 1 and less than or equal to K;

the first type of beam information includes M channel layer information, and the second criterion is: in a transmitting beam set corresponding to the M1 layer beam information of the first type of beam information, the maximum reference signal receiving power corresponding to the M2 layer beam information, and/or the maximum reference signal receiving quality, and/or the reference signal receiving power is greater than a threshold P8, and/or the reference signal receiving quality is greater than a threshold Q8, M1 is not equal to M2, and M1 and M2 are integers greater than or equal to 1 and less than or equal to M;

further, the transmission beam information in the second type of beam information is a subset of the transmission beam information in the first type of beam information;

further, the base station informs the terminal of a second criterion through at least one of the following signaling, and/or whether to report second type beam information, and/or a reference signal receiving power threshold, and/or a reference signal receiving quality threshold;

the signaling comprises high-layer signaling and physical layer signaling.

In the embodiment of the invention, the base station informs the terminal of the beam information measurement resource set and/or the beam information measurement limiting condition through the configuration information.

maximum channel layer number limit information;

and measuring limitation conditions of the beam information corresponding to each layer and/or each beam measuring process.

furthermore, the base station informs the terminal of the beam information measurement limiting condition by configuring a beam information measurement resource bit map corresponding to the beam information measurement resource set;

furthermore, the base station informs the terminal of the beam information measurement limiting condition by configuring a beam information measurement resource bitmap corresponding to the active subset of the beam information measurement resource set;

further, the base station informs the terminal of the beam information measurement restriction condition by configuring the ID of the beam information in the beam information measurement resource set;

further, the base station informs the terminal of the beam information measurement restriction condition by configuring the ID of the beam information in the active subset of the beam information measurement resource set;

furthermore, the beam information measurement limitation condition corresponding to the mth layer and/or the mth beam measurement process depends on the beam information measurement limitation condition corresponding to the nth layer and/or the nth beam measurement process, wherein n is less than m;

further, the mth layer and/or the selectable beam resource indicated by the beam limitation condition corresponding to the mth beam measurement process is/are the nth layer and/or a subset of the selectable beam resource indicated by the beam limitation condition corresponding to the nth beam measurement process, where n < m, further, the base station determines a beam corresponding to the beam indication information reported by the terminal according to the beam information measurement resource set configured to the terminal by the base station and/or the beam information measurement limitation condition set and the precoding indication information reported by the terminal, where the beam information is selected from the beam information measurement resource set and satisfies the beam information measurement limitation condition set or the subset of the beam information measurement limitation condition set.

Furthermore, the terminal reported precoding indication information received by the base station at least includes the following two types:

the first category: the indicated precoding matrix is precoding indication information of a diagonal matrix;

Furthermore, when the precoding indication information is type one, and the selectable beam resource indicated by the beam information measurement restriction condition subset corresponding to the reported beam information received by the base station is type two, the subset of the selectable beam resource indicated by the beam information measurement restriction condition subset corresponding to the reported beam information received by the base station is type two

Furthermore, when the precoding indication information is of the second category, the reported beam indication information received by the base station corresponds to the beam information measurement resource set, and when the precoding indication information is of the first category, the reported beam indication information received by the base station corresponds to the beam information measurement resource subset meeting the beam information measurement restriction condition in the beam information measurement resource set;

further, the base station informs the terminal of the beam information measurement resource set, and/or an active subset of the beam information measurement resource set, and/or the beam information measurement restriction condition by at least one of the following signaling;

here, the signaling includes higher layer signaling, MAC signaling, RRC signaling, physical layer signaling.

The beam may be a resource (e.g., transmit-side precoding, receive-side precoding, antenna port, antenna weight vector, antenna weight matrix, etc.), and the beam ID may be replaced with a resource ID because the beam may be bound to some time-frequency code resources for transmission. A beam may also be a transmission (transmit/receive) mode; the transmission mode may include spatial multiplexing, frequency domain/time domain diversity, etc.

The receiving beam indication means that the sending end can indicate by assuming quasi-co-location (QCL) of a current reference signal and antenna port and a reference signal (or reference signal) and antenna port reported by UE feedback;

the receiving beam refers to a beam of a receiving end that does not need to be indicated, or a beam resource of the receiving end that can be indicated by a quasi-co-location (QCL) of a reference signal (or a reference signal) and an antenna port, which are reported by the sending end and the UE through a current reference signal and the antenna port in a feedback manner.

The essence of the technical solution of the embodiments of the present invention is further clarified by specific examples below.

The terms "first," "second," and the like in the embodiments of the present invention are used for distinguishing similar objects, and are not used for describing a particular order or sequence.

Example 1

This embodiment provides a specific implementation of measurement and reporting of beam information.

Firstly, a base station configures reference signal resources for a terminal to measure beam information, specifically, the reference signal resources configured for the terminal by the base station include reference signal time domain resources, reference signal frequency domain resources and reference signal port resources, and meanwhile, the base station loads beams on each reference signal resource and sends out beam-shaped reference signals (BFed RSs). Since the analog beam can only be applied to the whole bandwidth, the base station needs a plurality of antenna panels to realize multiplexing of the analog beam in the frequency domain, such as the example of the base station mounting two antenna panels shown in fig. 1. As shown in fig. 1, a base station makes 4 beams on a first antenna panel, and outputs 4 beams on a second antenna panel 2, where the beams of the first antenna panel are configured with 4 resources, that is, a frequency domain resource F1 and a time domain resource T1/T2/T3/T4, each time-frequency domain resource corresponds to one beam, and the number of ports included in each time-frequency domain resource is determined by an actual beam; 4 resources are configured for the beam of the second antenna panel, which are a frequency domain resource F2 and a time domain resource T1/T2/T3/T4, each time-frequency domain resource corresponds to one beam, and the number of ports included in each time-frequency domain resource is determined by an actual beam. Each frequency domain resource represents one or more subcarriers, the number of the subcarriers is determined by the number of ports, each time domain resource represents one or OFDM symbol, and the number of the symbols is determined by the repeated transmission times of each beam.

And then, the terminal receives the resource configuration information of the reference signal sent by the base station, and performs beam receiving quality measurement on corresponding resources through receiving beam polling. Specifically, assuming that the terminal can receive signals through two receiving beams at the same time, for example, the terminal is equipped with two antenna panels, the terminal receives the reference signals through the receiving beams alternately used on the reference signal configuration resource, and measures the corresponding reference signal receiving power or the reference signal receiving quality, and for the reference signals repeatedly transmitted by the beams in the time domain, the terminal uses different receiving beams for receiving. Finally, the terminal selects two receiving beams with larger receiving power or better receiving quality and a corresponding transmitting beam set, as shown in fig. 2, the terminal selects, according to the maximum reference signal receiving power or reference signal receiving quality, or whether the reference signal receiving power is greater than a threshold value P1, or whether the reference signal receiving quality is greater than a threshold value Q1, by measuring the beams, as a first criterion, two better receiving beams, that is, a receiving beam 1 and a receiving beam 2, and corresponding better transmitting beams under the respective receiving beams, that is, a transmitting beam 1, a transmitting beam 2, and a transmitting beam 3 corresponding to the receiving beam 1, and a transmitting beam 4, a transmitting beam 5, and a transmitting beam 6 corresponding to the receiving beam 2, so that the selected 6 beams are divided into 2 groups, and the terminal reports the selected beam information and the corresponding grouping information.

By selecting the beam according to the first criterion, a better transmitting-receiving beam pair of each receiving panel can be obtained, when a plurality of beam pairs are available, especially when a plurality of receiving beams are available, multiplexing gain can be improved through multi-layer data stream transmission, and the purpose of improving system throughput can be further achieved. However, if only the terminal feeds back only the beam selected by the first criterion to support multi-layer data stream transmission, a problem of large inter-layer interference may result. Specifically, there is a certain correlation between channels of two co-located panels, and a transmission beam of the first base station panel selected by a beam on the first terminal receiving panel may also cause a certain interference to a reception beam of the second terminal panel, which may affect the improvement of multiplexing gain and a certain impact on system throughput. Therefore, the interference information needs to be reported to some extent, so that the base station can perform some preprocessing on the inter-layer interference. Thus, in order to deal with the problem of inter-layer interference, the terminal needs to select and report beam information through a second criterion. The simplest way to select a beam for this second criterion is to report the information of the transmit beam with relatively poor reception quality. Specifically, the terminal reports the beam or beam pair with the minimum reference signal received power or the minimum reference signal received quality, or whether the reference signal received power or quality is less than a smaller threshold value P2 or Q2. Therefore, the base station can know the interference situation caused by the transmitting beams of different panels under different receiving beams through the report of the terminal. For example, in fig. 2, the base station reports the beam information according to the first criterion, and knows that the beam pair { transmitting end {1,2,3}, receiving end 1} and { transmitting end {4,5,6}, receiving end 2} can obtain a larger reference signal received power or reference signal received quality, respectively; according to the second criterion, the base station can know that the beam pair { transmitting end {1,2}, receiving end 2} and the beam pair { transmitting end 6, receiving end 1} can reach smaller reference signal receiving power or reference signal receiving quality. Through the report of the two types of beam information, the base station can know that the transmitting beams 1,2 and 3 are transmitted on the first panel, the transmitting beams 4,5 and 6 are transmitted on the second panel, when the receiving beams are respectively 1 and 2, the receiving powers on the two panels are larger, in addition, the interference of the transmitting beam 6 to the receiving beam 1 is smaller, and the interference of the transmitting beams {1,2} to the receiving beam 2 is smaller, so that the base station can comprehensively make the transmitting beam configuration during data transmission or next beam training according to the conditions of the receiving signals and the interference.

The second criterion is simpler to select beams, but since there are more beams with smaller received power or reception quality, it may bring larger overhead for feeding back the second type of beam information, and on the other hand, the reporting of the second type of beam information needs to be optimized, since the beam forming decision for the base station may be only a small part of the beam forming decision. The optimized direction is to select and report the second type of beam information based on the report of the first type of beam information, namely, the selection and report of the second type of beam information depend on the selection of the first type of beam information. Specifically, there are the following ways:

the first method is as follows: and the terminal selects the reported beam information only according to the minimum reference information receiving power corresponding to the received beam information in the first type of beam information and/or the minimum reference signal receiving quality, and/or the reference signal receiving power is less than a threshold value P3 and/or the reference signal receiving quality is greater than a threshold value Q3.

The first type of beam information already tells the base station to select the relevant information of the sending and receiving beam pairs, and the second type of beam information only has the receiving beam receiving information received by the first type of receiving beam information to be useful for the base station, so the terminal can select and report the sending beam according to the minimum reference signal receiving power corresponding to the receiving beam information in the first type of beam information, and/or the minimum reference signal receiving quality, and/or the criterion of meeting the condition of being less than a certain threshold value. Thus, compared with the second type of beam information reporting without limiting the receiving beam, the feedback overhead can be reduced.

There are many variations of the above-described method.

The first method is modified as follows: the terminal reports the beam information and reports the channel rank indication information at the same time, which represents the maximum layer number of the channel and indicates the maximum achievable transmission stream number of the base station. When a terminal reports to a base station, for a channel rank calculated by the maximum reference signal received quality or the reference signal received power and/or the reference signal received power or the received quality being greater than a threshold, beam information including transmitted and received beam information is fed back for each layer, generally speaking, the same layer can use the same received beam to receive, and the terminal feeds back the transmitted beam information selected according to the maximum and minimum reference signal received quality or the reference signal received power and/or the reference signal received power or the received quality being less than the threshold according to the beam information of each layer.

The first modification is as follows: when the terminal reports the beam information, the beam information is grouped, and each group represents a sending beam group corresponding to the same terminal panel. When the terminal reports to the base station, the maximum reference signal receiving quality or the reference signal receiving power is calculated for each panel, and/or the sending beam group which meets the reference signal receiving power or meets the condition that the receiving quality is larger than the threshold value is selected, the panel which can carry out data transmission is selected, the reported beam group is formed, and the minimum reference signal receiving quality or the reference signal receiving power is selected and reported for each beam group, and/or the sending beam information which meets the reference signal receiving power or meets the condition that the receiving quality is smaller than the threshold value is selected.

The second method comprises the following steps: the first type of beam information comprises K pieces of receiving beam information, and the second criterion is as follows: in a transmission beam set corresponding to the kth 1 receiving beam information of the first type of beam information, the maximum reference signal receiving power corresponding to the kth 2 receiving beam, and/or the maximum reference signal receiving quality, and/or whether the reference signal receiving power or the receiving quality is greater than a threshold value, K1 is not equal to K2, and K1 and K2 are integers greater than or equal to 1 and less than or equal to K.

By feeding back the minimum reference signal reception quality or the minimum reference signal reception power information for the reception beam in the first beam information in the first mode, a certain feedback overhead can be reduced, and by the second mode, the feedback overhead can be further reduced. The second approach can be considered as a further refinement of the first approach. The terminal feeds back the maximum reference signal receiving quality or the maximum reference signal receiving power received by the receiving beam of another group in the sending beam set, and/or whether the reference signal receiving power or the receiving quality is greater than a threshold value or not to obtain beam information, wherein the beam information reflects the beam information causing larger interlayer interference in the first type of beam set.

The second embodiment has various modifications.

The second modification is as follows: the terminal reports the beam information and reports the channel rank indication information at the same time, which represents the maximum layer number of the channel and indicates the maximum achievable transmission stream number of the base station. When the terminal reports to the base station, the channel rank calculated for the maximum reference signal received quality or the reference signal received power feeds back beam information including the information of transmitting and receiving beams for each layer, generally speaking, the same layer can use the same receiving beam for receiving, and the terminal selects and feeds back the maximum reference signal received quality or the reference signal received power received by the receiving beam of the other layer in the transmitting beams, and/or the beam information of which the reference signal received power or the received quality is greater than a threshold value.

The second modification is: when the terminal reports the beam information, the beam information is grouped, and each group represents a sending beam group corresponding to the same terminal panel. When the terminal reports to the base station, a sending beam group which maximizes the reference signal receiving quality or the reference signal receiving power is calculated for each panel, a panel which can carry out data transmission is selected to form a reported beam group, and in the beam group, the sending beam information which utilizes the panel of another beam group to receive and obtain the maximum reference signal receiving quality or the reference signal receiving power and/or the reference signal receiving power or the receiving quality is larger than a threshold value is selected and reported.

The second type of beam information obtained by means of the second method is a subset of the first type of beam information.

The above method and its variants have advantages in the aspects of overhead, computational complexity, etc., and the base station can flexibly configure, according to the capability of the terminal and the needs of the network itself, which method the terminal reports the second type of beam information and/or the threshold of the reference signal received power or received quality used for determination, through the high layer signaling or the physical layer signaling.

Example 2

This embodiment provides a specific implementation of the beam information measurement.

In a beam-based wireless communication system, transmission of multi-layer data streams can be realized by finding a plurality of transmitting and receiving beam pairs with better quality. Generally, the terminal enables the base station to acquire better beam information by feeding back reference signal resources or port information. When the base station performs multi-layer data stream transmission by using the beam information fed back by the terminal, certain interlayer interference may exist between beams, which affects the throughput performance of multi-layer transmission. One of the solutions to this problem is through the multi-criteria beam feedback method given in embodiment 1, which gives another solution.

Generally, the acquisition of beam information is performed in multiple steps, and first, the base station configures reference signal resources for users in a cell to perform an initial beam scanning, which may be configured at a cell level. The terminal can feed back the information of the transmitting and receiving beams by the way of embodiment 1 through the channel measurement. Further, when a wider beam is used, the base station may calculate correlation between beams by the wide beam information fed back from the terminal and judge the degree of mutual interference between beams.

Generally, the feedback of the beam information includes a plurality of groups of beam information, and the grouping criteria includes grouping the beams into the same group according to the terminal reception beam group or the terminal panel group, i.e., the beams corresponding to the same reception beam or the same terminal panel. Furthermore, for multiple users or groups of users, the beam groups may be shared, as the beams between users may be similar. For example, the beam feedback of a plurality of users can be divided into two groups A and B, wherein the beam group A comprises K1 beams { A } ₁ ，…，A _K1 The beam group B comprises K2 beams { B } ₁ ，…B _K2 And the two groups of beams respectively correspond to different receiving beams or receiving antenna panels. In addition, the base station may determine that M1 beams in a may generate large interference to beams in B and M2 beams in B may generate large interference to beams in a through the second type of beam information fed back by the user or based on the judgment of the correlation between beams by the base station itself.

Then, the base station configures a beam measurement reference signal resource set for beam refinement based on feedback of the beam information of the previous step to a user or a user group. The beam measurement reference signal resource comprises a time domain resource, a frequency domain resource and a port resource of a reference signal. In the beam information obtained in the previous step, for the fact that repeated beams may exist between A and B, the total number of beams is assumed to be K, and K1+ K2 is greater than or equal to K, so that in order to avoid unnecessary measurement by the terminal, the terminal is only required to measure K beams for the refinement of the actual beams. Therefore, the beam measurement reference signal resource set configured by the base station actually includes measurement resources of K beams. The base station may configure the K beam measurement resources to the terminal through RRC signaling. In order to avoid selecting a beam causing large interlayer interference when the terminal performs the report of beam refinement, the base station needs to inform the terminal of the beam measurement limiting condition, and the terminal only measures the beam resource allowed by the report limiting condition.

Consider the beam measurement restriction condition configuration in two cases.

The first condition is as follows: the K beams are all used for beam measurements.

This case is used for periodic beam measurements, or semi-persistent or non-periodic beam measurements where all K beam resources are activated. The limitations of this measurement are shown in fig. 3. Specifically, the base station can roughly judge the maximum number of layers that can be supported by the feedback measured in the previous step, the number of terminal antenna panels, and the number of base station antenna panels. Therefore, when performing the measurement configuration at this step, the base station may configure the information of the maximum number of layers to the terminal, so as to limit the calculation of the number of layers by the terminal, and reduce the calculation amount and the probability of calculation errors of the terminal. Furthermore, in order to avoid inter-layer interference and unnecessary measurement of the terminal, the base station needs to limit the beams that the terminal needs to measure in each layer, for example, for the calculation of layer 1, the base station may configure the terminal not to measure M1 interfering beams and K2 beams in B, and for the calculation of layer 2, the base station may configure the terminal not to measure M2 interfering beams and K2 beams in a. To achieve this limitation, the base station may signal the terminal, and for the report corresponding to each layer, the beam information measures the beam of the report that is not measurable by the terminal in the resource set. The specific signaling manner may be a bitmap manner, for example, in K total beams, the base station marks the beam that the terminal is not expected to measure on layer 1 as 1, and marks the other beams as 0, or vice versa, and configures one bitmap for each layer, where the length of each bitmap is K. Or the base station may report the ID information of the beam in the beam set by informing the terminal about the report of each layer, which is not desired to be measured, or which needs to be measured. The method for carrying the signaling may be higher layer signaling, for example, RRC signaling or MAC layer signaling, to implement semi-static or semi-persistent configuration, or physical layer signaling, for example, DCI, to implement dynamic configuration.

Case two: a subset of the beam set of K beams is used for beam measurement.

This case is used to activate a subset of K beams for semi-continuous or dynamic beam measurements. The restriction is performed in a similar manner as in the case, but for the active subset of the set of beams. Specifically, the base station can roughly determine the maximum number of layers that can be supported by the feedback measured in the previous step, the number of terminal antenna panels, and the number of base station antenna panels. Therefore, when performing the measurement configuration at this step, the base station may configure the information of the maximum number of layers to the terminal, so as to limit the calculation of the number of layers by the terminal, and reduce the calculation amount and the probability of calculation errors of the terminal. Furthermore, in order to avoid inter-layer interference and unnecessary measurement of the terminal, the base station needs to limit the beams that the terminal needs to measure in each layer, for example, for the calculation of layer 1, the base station may configure the terminal not to measure the beams belonging to M1 interference beams in the active beam subset and the beams belonging to K2 beams in B, whereas for the calculation of layer 2, the base station may configure the terminal not to measure the beams belonging to M2 interference beams in the active beam subset and the beams belonging to K2 beams in a. To achieve this limitation, the base station may signal to the terminal that for the report corresponding to this layer, the beam information measures the beams of the report that the terminal cannot measure in the active subset of the resource set. The specific signaling method may be a bitmap method, for example, in the total active beam subset, the base station marks the beam that the terminal is not expected to measure on layer 1 as 1, and the others as 0, or vice versa, and configures one bitmap for each layer, where the length of each bitmap is less than K. Or the base station may report the ID information of the beam in the active beam subset that the terminal does not want to measure or needs to measure for each layer by informing the terminal. The method for carrying the signaling may be higher layer signaling, for example, MAC layer signaling, to implement semi-persistent configuration, or physical layer signaling, for example, DCI, to implement dynamic configuration.

By the beam measurement limiting configuration, the terminal can avoid reporting the beam with the inter-layer interference, reduce unnecessary measurement and calculation and reduce the complexity of implementation.

Example 3

This embodiment provides a specific implementation of the beam information acquisition. In a 5G wireless communication system, in order to obtain a more stable link, at least two antenna panels with different orientations will become a common antenna configuration for a terminal. A back-to-back configuration of the termination panel is shown in fig. 4.

As shown in fig. 4, the terminal is configured with two antenna panels, and the antenna orientations of the panel 1 and the panel 2 are greatly different from each other, for example, 180 degrees different from each other, that is, the directions of the receiving beams that can be used by the two antenna panels are greatly different from each other, and can be regarded as two relatively independent receiving beams. Therefore, when performing beam training, beam training can be performed for the two receiving panels relatively independently, so that two beam management processes can be formed for the two terminal antenna panels, and each beam management process can perform relatively independent measurement and feedback of transmitting and receiving beams. For example, in fig. 4, where there are two large reflectors, the base station may project two beam directions and perform a layer 2 transmission via two receive beams projected by two receive antenna panels. When training the beams corresponding to the two beam management processes or the two layers, in order to achieve data transmission with high throughput, it is necessary to minimize interference between the two layers. One way is to report interference beams on two antenna panels by the method in embodiment 1, and to perform beam measurement limitation for each layer or each beam management process by the method in embodiment 2. Another way may be performed by:

step 1: training the transmit and/or receive beams of a layer 1 or layer 1 beam management process. In this step, the beam measurement resource may not be limited, that is, the terminal may measure and report the beam information measurement resource configured by all the base stations.

And 2, step: the base station judges the beam to be measured on the layer 2 according to the beam information reported in the step 1, and does not bring large interlayer interference, so the terminal can configure the beam measurement limiting condition of the layer 2 or the layer 2 beam management process to limit specific beam terminals which do not need to be measured or need to be measured.

And step 3: in order to perform beam measurement reporting of an mth layer or an mth beam management process, m is greater than 2, the base station determines a beam to be measured by the mth layer or the mth beam management process according to beam information feedback of a previous m-1 layer or a previous m-1 layer, and does not bring about large inter-layer interference, so the terminal may configure a beam measurement limiting condition of the mth layer or the mth beam management process, the configuration of the condition may be notified according to the beam measurement limiting condition of the nth layer or the nth beam management process, n is less than m, for example, may be configured on the basis of the beam measurement limiting condition of the nth layer or the nth beam management process, and those beam resources also need to be limited.

By using the method, the beam measurement limiting conditions of the multi-layer or multi-beam management process can be configured more efficiently, and the beam measurement reporting suitable for the multi-layer is realized in a multi-layer or multi-process beam training mode.

Example 4

This embodiment provides a specific implementation of measurement and reporting of beam information. In the hybrid beamforming system, beams are divided into analog beams and digital beams. The analog wave beam is realized at the radio frequency end, only one wave beam can be emitted by each panel at each moment, only a broadband wave beam can be formed, the digital wave beam is realized at a baseband, the realization is more flexible, and the wave beam of a sub-band can be formed. The implementation flow of hybrid beamforming is shown in fig. 5.

When the base station is equipped with multiple antenna panels, the base station may form multiple analog beams at the same time, for example, when there are two antenna panels, two beams a and two beams B may be formed, and the precoding matrix of the analog beamforming is shown as follows:

after using the digital beam, the following precoding matrix can be formed:

where a and b are phase or amplitude factors adjusted by the baseband. When performing beam training and CSI feedback, the terminal may obtain the completed beam and CSI information by feeding back the beam information corresponding to a and B and the precoding indication information (PMI) corresponding to a and B.

If there is no digital beam, multi-layer transmission is realized only through the analog beam in formula (1), or the digital beam is a diagonal matrix, large inter-layer interference may be brought, at this time, the inter-layer interference needs to be reduced through a strong beam measurement resource restriction condition, and when the digital beam is as shown in formula (2), the inter-layer interference can be reduced through controlling a and b, at this time, strong beam measurement resource restriction does not need to be performed. Therefore, the terminal jointly determines the beam resource to be measured through the beam information measurement resource set, the beam information measurement limiting condition and the selected precoding indication information. Specifically, the PMIs may be divided into multiple classes, and the selectable beam information measurement resource corresponding to the PMI of each class is a different subset of the whole resource set. For example, a PMI whose indicated precoding is an identity matrix or a diagonal matrix may be regarded as class one, and a PMI whose indicated precoding is an off-diagonal matrix may be regarded as class two. At this time, the first category needs stronger beam measurement restriction than the second category, that is, when the PMI selected by the terminal belongs to the first category, the used optional beam information measurement resource is a subset of the optional beam information measurement resource used when the PMI selected by the terminal belongs to the second category. Specifically, for the category two, the beam measurement restriction condition may not be needed, so that when the PMI selected by the terminal belongs to the category two, the reported beam information may be measured in the entire beam information measurement resource set, and when the selected PMI belongs to the category one, the terminal measures the reported beam information on the subset of the beam information measurement resource set according to the beam information measurement restriction condition configured by the base station. By the mode, the terminal can flexibly and dynamically measure and feed back the analog beam according to the reporting condition of the PMI, so that the beam training and CSI reporting suitable for multi-layer transmission can be efficiently realized.

Fig. 6 is a schematic structural diagram of a beam information feedback apparatus according to a first embodiment of the present invention, and as shown in fig. 6, the beam information feedback apparatus according to the first embodiment of the present invention includes:

a measurement unit 60 that measures a reference signal and generates a measurement result;

a selecting unit 61, configured to select, based on the measurement result, first type beam information according to a first criterion, and select second type beam information according to a second criterion;

a reporting unit 62, configured to report the first type beam information and the second type beam information to a network side.

In an embodiment of the present invention, the first criterion at least includes one of the following: a maximum reference signal received power; maximum reference signal received quality; greater than a reference signal received power threshold P1; greater than the reference signal received quality threshold Q1.

In an embodiment of the present invention, the second criterion includes at least one of:

a minimum reference signal received power;

a minimum reference signal received quality;

less than a reference signal received power threshold P2;

less than the reference signal received quality threshold Q2.

or, the minimum reference signal received power and/or the minimum reference signal received quality corresponding to the transmission beam information group in the first type of beam information, and/or the reference signal received power is less than a threshold P4, and/or the reference signal received quality is less than a threshold Q4;

or, the minimum reference signal received power corresponding to the channel layer information in the first type of beam information, and/or the minimum reference signal received quality, and/or the reference signal received power is less than a threshold P5, and/or the reference signal received quality is less than a threshold Q5;

or, there are K pieces of receiving beam information in the first type of beam information, and the second criterion is: in a transmitting beam set corresponding to the kth 1 receiving beam information of the first type of beam information, the maximum reference signal receiving power corresponding to the kth 2 receiving beam, and/or the maximum reference signal receiving quality, and/or the reference signal receiving power is greater than a threshold P6, and/or the reference signal receiving quality is greater than a threshold Q6, K1 is not equal to K2, and K1 and K2 are integers greater than or equal to 1 and less than or equal to K;

or L pieces of transmission beam group information exist in the first type of beam information, and the second criterion is: in a transmitting beam set corresponding to the L1 beam group information of the first type of beam information, the maximum reference signal receiving power corresponding to the L2 beam group, and/or the maximum reference signal receiving quality, and/or the reference signal receiving power is greater than a threshold P7, and/or the reference signal receiving quality is greater than a threshold Q7, L1 is not equal to L2, and L1 and L2 are integers which are greater than or equal to 1 and less than or equal to L;

or, the first type of beam information includes M channel layer information, and the second criterion is: in a transmission beam set corresponding to the M1-layer beam information of the first type of beam information, the maximum reference signal received power corresponding to the M2-layer beam information, and/or the maximum reference signal received quality, and/or the reference signal received power is greater than a threshold P8, and/or the reference signal received quality is greater than a threshold Q8, M1 is not equal to M2, and M1 and M2 are integers greater than or equal to 1 and less than or equal to M.

The beam information feedback apparatus in this example is applied to the terminal side.

Those skilled in the art will understand that the implementation functions of each processing unit in the beam information feedback apparatus in this example can be understood by referring to the related description of the beam information feedback method. The functions of the units in the beam information feedback apparatus shown in fig. 6 may be implemented by a program running on a processor, or may be implemented by specific logic circuits. For example, the measuring unit 60 and the selecting unit 61 may be implemented by a microprocessor, an FPGA, a DSP, etc., and the reporting unit 62 may be implemented by an antenna system, etc.

Fig. 7 is a schematic structural diagram of a beam information feedback apparatus according to a second embodiment of the present invention, and as shown in fig. 7, the beam information feedback apparatus according to the second embodiment of the present invention includes:

a determining unit 70, configured to determine a beam information measurement resource set and/or a beam information measurement restriction condition according to the network side configuration information;

a measuring unit 71, configured to measure beam information satisfying a beam information measurement restriction condition in the beam information measurement resource set;

a reporting unit 72, configured to report the beam information meeting the condition to the network side.

In this embodiment of the present invention, the configuration information includes beam information measurement resource set configuration information, where the beam information measurement resource set configuration information includes at least one of the following information: reference signal frequency domain resource information, reference signal time domain resource information, reference signal port information.

In the embodiment of the present invention, the configuration information includes beam information measurement restriction condition configuration information;

the beam information measurement restriction condition configuration information includes at least one of:

maximum channel layer number limit information;

Those skilled in the art will understand that the implementation functions of each processing unit in the beam information feedback apparatus in this example can be understood by referring to the related description of the beam information feedback method. The functions of the units in the beam information feedback apparatus shown in fig. 7 may be implemented by a program running on a processor, or may be implemented by specific logic circuits. For example, the determination unit 70 and the measurement unit 71 may be implemented by a microprocessor, an FPGA, a DSP, or the like, and the reporting unit 72 may be implemented by an antenna system or the like.

Fig. 8 is a schematic structural diagram of a beam information feedback apparatus according to a third embodiment of the present invention, and as shown in fig. 8, the beam information feedback apparatus according to the third embodiment of the present invention includes:

the receiving unit 80 is configured to receive beam information reported by a terminal, where the beam information includes first type beam information selected and reported by the terminal according to a first criterion, and second type beam information selected and reported according to a second criterion.

a minimum reference signal received power;

a minimum reference signal received quality;

less than a reference signal received power threshold P2;

less than the reference signal received quality threshold Q2.

The beam information feedback apparatus in this example is applied to the network side, which is a base station side as an example.

Those skilled in the art will understand that the implementation functions of each processing unit in the beam information feedback apparatus in this example can be understood by referring to the related description of the beam information feedback method. The functions of the units in the beam information feedback apparatus shown in fig. 8 may be implemented by a program running on a processor, or may be implemented by specific logic circuits. Such as the receiving unit 80, may be implemented by an antenna system or the like.

Fig. 9 is a schematic structural diagram of a beam information feedback apparatus according to a fourth embodiment of the present invention, and as shown in fig. 9, the beam information feedback apparatus according to the embodiment of the present invention includes:

a notifying unit 90, configured to notify the terminal of the beam information measurement resource set and/or the beam information measurement restriction condition through the configuration information.

maximum channel layer number limit information;

Those skilled in the art will understand that the implementation functions of each processing unit in the beam information feedback apparatus in this example can be understood by referring to the related description of the beam information feedback method. The functions of the units in the beam information feedback apparatus shown in fig. 9 may be implemented by a program running on a processor, or may be implemented by specific logic circuits. Such as the notification unit 90, may be implemented by an antenna system or the like.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.

Alternatively, the integrated unit of the present invention may be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or a part contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A method for feeding back beam information, the method comprising:

the terminal measures the reference signal and generates a measuring result;

based on the measurement result, selecting first type beam information according to a first criterion, selecting second type beam information according to a second criterion, and reporting the first type beam information and the second type beam information to a network side;

the selection of the second type of beam information depends on the first type of beam information;

the second criterion includes at least one of:

2. The method of claim 1, wherein the beam information comprises at least one of: transmitting beam information; transmitting beam group information; beam information is received.

3. The method of claim 1, wherein the first criterion comprises at least one of: a maximum reference signal received power; maximum reference signal received quality; greater than a reference signal received power threshold P1; greater than the reference signal received quality threshold Q1.

4. The method of claim 1, wherein the second criterion comprises at least one of:

a minimum reference signal received power;

a minimum reference signal received quality;

less than a reference signal received power threshold P2;

less than the reference signal received quality threshold Q2.

5. The method of claim 2, wherein the transmission beam information in the second type of beam information is a subset of the transmission beam information in the first type of beam information.

6. The method of claim 1, further comprising:

the terminal determines a second criterion through at least one of the following signaling, and/or whether to report second type beam information, and/or a reference signal receiving power threshold, and/or a reference signal receiving quality threshold;

the signaling comprises higher layer signaling or physical layer signaling.

7. A method for feeding back beam information, the method comprising:

a network side receives beam information reported by a terminal, wherein the beam information comprises first type beam information selected and reported by the terminal according to a first criterion and second type beam information selected and reported according to a second criterion;

the second criterion includes at least one of:

8. The method of claim 7, wherein the beam information comprises at least one of: transmitting beam information; transmitting beam group information; beam information is received.

9. The method of claim 7, wherein the first criterion comprises at least one of: a maximum reference signal received power; maximum reference signal received quality; greater than a reference signal received power threshold P1; greater than the reference signal received quality threshold Q1.

10. The method of claim 7, wherein the second criterion comprises at least one of:

a minimum reference signal received power;

a minimum reference signal received quality;

less than a reference signal received power threshold P2;

less than the reference signal received quality threshold Q2.

11. The method of claim 7, wherein the transmission beam information in the second type of beam information is a subset of the transmission beam information in the first type of beam information.

12. The method of claim 7, further comprising:

the network side informs the terminal of a second criterion through at least one of the following signaling, and/or whether to report second type beam information, and/or a reference signal receiving power threshold, and/or a reference signal receiving quality threshold;

the signaling comprises higher layer signaling or physical layer signaling.

13. A beam information feedback apparatus, characterized in that the apparatus comprises:

a reporting unit, configured to report the first type of beam information and the second type of beam information to a network side;

the selection of the second type of beam information depends on the first type of beam information; the second criterion includes at least one of:

or, the minimum reference signal received power corresponding to the transmission beam information group in the first type of beam information, and/or the minimum reference signal received quality, and/or the reference signal received power is less than a threshold P4, and/or the reference signal received quality is less than a threshold Q4;

14. The apparatus of claim 13, wherein the first criterion comprises at least one of: a maximum reference signal received power; maximum reference signal received quality; greater than a reference signal received power threshold P1; greater than the reference signal received quality threshold Q1.

15. The apparatus of claim 13, wherein the second criterion comprises at least one of:

a minimum reference signal received power;

a minimum reference signal received quality;

less than a reference signal received power threshold P2;

less than the reference signal received quality threshold Q2.

16. A beam information feedback apparatus, characterized in that the apparatus comprises:

the receiving unit is used for receiving beam information reported by a terminal, wherein the beam information comprises first type beam information selected and reported by the terminal according to a first criterion and second type beam information selected and reported according to a second criterion;

the second criterion includes at least one of:

17. The apparatus of claim 16, wherein the first criterion comprises at least one of: a maximum reference signal received power; maximum reference signal received quality; greater than a reference signal received power threshold P1; greater than the reference signal received quality threshold Q1.

18. The apparatus of claim 16, wherein the second criterion comprises at least one of:

a minimum reference signal received power;

a minimum reference signal received quality;

less than a reference signal received power threshold P2;

less than the reference signal received quality threshold Q2.