WO2020147654A1

WO2020147654A1 - Method and device for downlink beam management

Info

Publication number: WO2020147654A1
Application number: PCT/CN2020/071372
Authority: WO
Inventors: 李岩; 王飞; 金婧; 郑毅; 王启星; 刘光毅
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2019-01-18
Filing date: 2020-01-10
Publication date: 2020-07-23
Also published as: CN111464218B; CN111464218A

Abstract

Provided are a method and device for downlink beam management. The method for downlink beam management at a terminal side comprises: a terminal measuring at least one downlink reference signal sent by a base station to acquire a measurement result of the downlink reference signal, and determining an attribute of an antenna receiving the downlink reference signal; and the terminal reporting the measurement result of the downlink reference signal to the base station and reporting the attribute of the antenna receiving the downlink reference signal.

Description

Method and equipment for downlink beam management

Cross-reference of related applications

This application claims the priority of Chinese Patent Application No. 201910048292.9 filed in China on January 18, 2019, the entire content of which is incorporated herein by reference.

Technical field

The embodiments of the present disclosure relate to the field of communication technologies, and in particular to a method and device for downlink beam management.

Background technique

At present, an example of a process for determining the beam of the Physical Uplink Shared Channel (PUSCH) based on Non-Codebook transmission is shown in Figure 1, including:

1) The base station pre-configures a sounding reference signal set (Sounding Reference Signal set, SRS set) for the terminal, and the set may include multiple sounding reference signal resources (SRS resources). For example, the SRS set includes up to 4 SRS resources, and each resource is a single port (port);

2) The terminal sends SRS to the base station.

3) The base station sends a sounding reference signal resource indicator (SRI, SRS resource indicator) information to the terminal finger through downlink control information (Downlink Control Information, DCI), which can be DCI format 0_1, to indicate the SRS resource corresponding to the beam selected by the base station After receiving the SRI, the terminal can determine the PUSCH transmission beam, determine the PUSCH precoding (precoder), and determine the PUSCH rank (Rank). For example, a terminal (UE) sends multiple SRSs, such as SRS0, SRS1, SRS2, and SRS3, and the base station selects SRS0 and SRS1 among them, which means that PUSCH is sent in the beam direction of SRS0 and SRS1, and the PUSCH precoder uses SRS0 and SRS1 precoders. , The rank of PUSCH=2. Among them, the 4 SRS resources can determine their own transmission beams according to the third parameter SRS-SpatialRelationInfo or associatedCSI-RS. Generally, SRS-SpatialRelationInfo and associatedCSI-RS are not configured for the terminal at the same time:

a)associatedCSI-RS mode:

a.1) Periodic/semi-persistent SRS: The associated CSI-RS ID can be determined by the third parameter associatedCSI-RS, and the terminal uses the CSI-RS beam to receive the SRS;

a.2) Aperiodic SRS: The associated CSI-RS ID can be determined through the SRS request field in the DCI, and the terminal uses the CSI-RS beam to send the SRS;

b) SRS-SpatialRelationInfo method:

b.1) When configured as SSB-Index, the terminal can use the beam that receives the SSB to send SRS;

b.2) When configured as CSI-RS-Index, the terminal uses the CSI-RS beam to send SRS;

b.3) When configured as SRS-Index, the terminal can refer to the SRS beam with the same periodicity and send the SRS.

The following problems exist when transmitting PUSCH based on non-codebook:

Assuming that the terminal capability is capable of sending 4 streams, and each antenna panel (panel) can only send 2 streams at the same time, in this way, when 2 panels are sent at the same time, 4-stream transmission can be formed, as shown in Figure 2. Assume that the base station configures 1 SRS set for the terminal, including 4 SRS resources, and each resource is a single port. For a two-panel terminal, it is assumed that the terminal has sent SRS0, SRS1, SRS2, and SRS3 (non-simultaneous transmission) on Panel 0, as shown in Figure 3. Subsequent base stations may indicate that the SRI for PUSCH transmission is {0,1,2,3} through DCI format 0_1 to indicate that the PUSCH transmission beams are SRS0, SRS1, SRS2, and SRS3 beams, and Rank=4. However, since SRS0, SRS1, SRS2, and SRS3 all come from panel 0, the terminal capability can only support a maximum of 2 streams at the same time on a panel, so 4-stream transmission of a panel cannot be realized.

The above-mentioned problems are particularly likely to occur when the uplink and downlink are reciprocal. For example, four SRS resources determine their respective transmission beams according to SRS-SpatialRelationInfo or associatedCSI-RS. When configuring CSI-RS as the reference signal for the SRS transmission beam, assuming that the terminal previously received CSI-RS0, CSI-RS1, CSI-RS2, and CSI-RS3 on Panel 0, the base station may configure SRS0 to refer to CSI-RS0 and SRS1 to refer to CSI-RS1, SRS2 refer to CSI-RS2, and SRS3 refer to CSI-RS3, thereby indicating that SRS0 is sent on the panel 0 where CSI-RS0 is received, and is consistent with the beam direction of CSI-RS0. The same applies to other SRS. However, since the base station (such as gNB) does not know which Panel the terminal (UE) uses to receive CSI-RS, the base station may choose SRS0, SRS1, SRS2, SRS3 to indicate to the terminal, and the terminal cannot send it on Panel 0 at the same time SRS0, SRS1, SRS2, and SRS3, so 4-stream uplink PUSCH transmission can be carried out originally, but it may be reduced to 2-stream transmission.

Summary of the invention

An objective of the embodiments of the present disclosure is to provide a method and device for downlink beam management, which can realize the reporting of antenna panel/antenna group information in the process of downlink beam management.

The embodiment of the present disclosure provides a method for downlink beam management, which is applied to the terminal side, and includes:

The terminal measures at least one downlink reference signal sent by the base station, obtains the measurement result of the downlink reference signal, and determines the attribute of the antenna that receives the downlink reference signal;

The terminal reports the measurement result of the downlink reference signal to the base station, and reports the attributes of the antenna that receives the downlink reference signal.

The embodiment of the present disclosure also provides a method for downlink beam management, which is applied to the base station side, and includes:

Sending at least one downlink reference signal to the terminal;

Receiving the measurement result of the downlink reference signal reported by the terminal, and receiving the antenna attribute for receiving the downlink reference signal reported by the terminal.

The embodiment of the present disclosure also provides a terminal, including:

A processor, configured to measure at least one downlink reference signal sent by a base station, obtain a measurement result of the downlink reference signal, and determine an antenna attribute for receiving the downlink reference signal;

The transceiver is used to report the measurement result of the downlink reference signal and report the attributes of the antenna receiving the downlink reference signal.

The embodiment of the present disclosure also provides a base station, including:

The transceiver is configured to send at least one downlink reference signal to the terminal; and to receive the measurement result of the downlink reference signal sent by the terminal, and to receive the attribute of the antenna for receiving the downlink reference signal reported by the terminal.

The embodiments of the present disclosure also provide a computer-readable storage medium having a computer program stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method described above are implemented.

In the downlink beam management method and device provided by the embodiments of the present disclosure, the reporting of antenna panel/antenna group information is introduced in the downlink beam management process, so that the base station knows which beam the terminal uses to receive downlink reference signals (such as CSI-RS), Therefore, the problem of affecting the uplink transmission performance of the terminal caused by the subsequent configuration of multiple SRSs that cannot be sent at the same time can be avoided.

BRIEF DESCRIPTION

By reading the detailed description of the following alternative embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only used for the purpose of showing alternative embodiments, and are not considered as a limitation to the present disclosure. Furthermore, throughout the drawings, the same reference symbols are used to denote the same components. In the drawings:

Fig. 1 is a schematic diagram of a PUSCH beam determination process based on non-codebook transmission in related technologies;

Fig. 2 is a schematic diagram of a related art terminal sending SRS;

Fig. 3 is another schematic diagram of a related art terminal sending SRS;

4 is a schematic diagram of an application scenario of a method for downlink beam management in an embodiment of the disclosure;

FIG. 5 is a flowchart of a method for downlink beam management provided by an embodiment of the disclosure;

FIG. 6 is another flowchart of a method for downlink beam management provided by an embodiment of the present disclosure;

FIG. 7 is one of the structural diagrams of the terminal of the embodiment of the disclosure;

FIG. 8 is the second structural diagram of a terminal according to an embodiment of the disclosure;

FIG. 9 is one of the structural diagrams of a base station according to an embodiment of the disclosure;

FIG. 10 is the second structural diagram of a base station according to an embodiment of the disclosure.

detailed description

Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

The terms “first”, “second”, etc. in the specification and claims of the present disclosure are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to the clearly listed Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment. In the description and claims, "and/or" means at least one of the connected objects.

The technology described in this article is not limited to Long Time Evolution (LTE)/LTE Evolution (LTE-Advanced, LTE-A) systems, and can also be used in various wireless communication systems, such as Code Division Multiple Access (Code Division Division) Multiple Access (CDMA), Time Division Multiple Access (Time Division Multiple Access, TDMA), Frequency Division Multiple Access (Frequency Division Multiple Access, FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency Multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA) and other systems. The terms "system" and "network" are often used interchangeably. The CDMA system can implement radio technologies such as CDMA2000 and Universal Terrestrial Radio Access (UTRA). UTRA includes Wideband CDMA (Wideband Code Multiple Access (WCDMA) and other CDMA variants. The TDMA system can implement radio technologies such as Global System for Mobile (GSM). OFDMA systems can implement radios such as UltraMobile Broadband (UMB), Evolution-UTRA (Evolution-UTRA, E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. technology. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and more advanced LTE (such as LTE-A) are new UMTS versions that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project (3GPP)". CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The technology described herein can be used for the systems and radio technologies mentioned above as well as other systems and radio technologies. However, the following description describes the NR system for example purposes, and NR terminology is used in most of the description below, although these techniques can also be applied to applications other than NR system applications.

The following description provides examples without limiting the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of the discussed elements without departing from the spirit and scope of the present disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described method can be performed in an order different from that described, and various steps can be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Please refer to FIG. 4, which shows a block diagram of a wireless communication system to which an embodiment of the present disclosure is applicable. The wireless communication system includes a terminal 41 and a base station 42. Among them, the terminal 41 may also be referred to as a user terminal or a user equipment (UE), and the terminal 41 may be a mobile phone, a tablet (Personal Computer), a laptop (Laptop Computer), or a personal digital assistant (Personal Digital Assistant). , PDA), mobile Internet device (Mobile Internet Device, MID), wearable device (Wearable Device) or vehicle-mounted device and other terminal side devices, it should be noted that the specific type of terminal 41 is not limited in the embodiments of the present disclosure . The base station 42 may be various base stations and/or core network elements. The above-mentioned base stations may be 5G and later base stations (for example: gNB, 5G NR NB, etc.), or base stations in other communication systems (for example: eNB, WLAN access point, or other access points, etc.), where the base station 42 can be called Node B, Evolved Node B, Access Point, Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver , Basic Service Set (BSS), Extended Service Set (ESS), Node B, Evolved Node B (eNB), Home Node B, Home Evolved Node B, WLAN Access Point, WiFi Node or some other appropriate term in the field, as long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiments of the present disclosure, only the base station in the NR system is taken as an example. However, the specific type of base station is not limited.

The base station 42 may communicate with the terminal 41 under the control of the base station controller. In various examples, the base station controller may be a part of a core network or some base stations. Some base stations can communicate control information or user data with the core network through the backhaul. In some examples, some of these base stations may communicate with each other directly or indirectly through a backhaul link, which may be a wired or wireless communication link. The wireless communication system can support operation on multiple carriers (waveform signals of different frequencies). Multi-carrier transmitters can transmit modulated signals on these multiple carriers simultaneously. For example, each communication link may be a multi-carrier signal modulated according to various radio technologies. Each modulated signal can be sent on a different carrier and can carry control information (eg, reference signals, control channels, etc.), overhead information, data, etc.

The base station 42 may wirelessly communicate with the terminal 41 via one or more access point antennas. Each base station can provide communication coverage for its corresponding coverage area. The coverage area of an access point may be divided into sectors that only constitute a part of the coverage area. The wireless communication system may include different types of base stations (eg, macro base stations, micro base stations, or pico base stations). The base station can also utilize different radio technologies, such as cellular or WLAN radio access technologies. The base station may be associated with the same or different access network or operator deployment. The coverage areas of different base stations (including the coverage areas of the same or different types of base stations, the coverage areas using the same or different radio technologies, or the coverage areas belonging to the same or different access networks) may overlap.

The communication link in the wireless communication system may include an uplink for carrying uplink (UL) transmission (for example, from the terminal 41 to the base station 42), or for carrying downlink (DL) transmission (For example, from the base station 42 to the terminal 41) downlink. UL transmission may also be referred to as reverse link transmission, and DL transmission may also be referred to as forward link transmission. Downlink transmission can be performed using licensed frequency bands, unlicensed frequency bands, or both. Similarly, uplink transmissions can be performed using licensed frequency bands, unlicensed frequency bands, or both.

As described in the background art, when the PUSCH is transmitted based on a non-codebook during uplink and downlink reciprocity, there may be four SRS configured by a base station (gNB) that cannot be sent at the same time, which directly affects the uplink transmission performance of the terminal. This problem occurs because the base station does not know which panel the terminal uses to receive the CSI-RS, which leads to improper configuration and makes it impossible to determine which SRS cannot be sent at the same time. To solve this problem, the embodiment of the present disclosure introduces Panel ID (or antenna group) information reporting in the downlink beam management process, so that the base station knows which beam the terminal uses to receive the downlink reference signal (such as CSI-RS), thereby It can avoid the problem of affecting the uplink transmission performance of the terminal caused by multiple SRS that cannot be sent at the same time after subsequent configuration.

Referring to FIG. 5, the method for downlink beam management provided by the embodiment of the present disclosure, when applied to the terminal side, includes:

Step 51: The terminal measures at least one downlink reference signal sent by the base station, obtains the measurement result of the downlink reference signal, and determines the attribute of the antenna that receives the downlink reference signal.

Here, the antenna attribute may include: the identification of the antenna panel to which the antenna belongs, the identification of the antenna group to which the antenna belongs, or the first parameter that can reflect the identification of the antenna panel/antenna group. Here, the downlink reference signal is a channel state information reference signal (CSI-RS) or a synchronization signal block (SS/PBCH block, SSB). Usually SSB is composed of primary synchronization signal (PSS), secondary synchronization signal (SSS) and PBCH.

Step 52: The terminal reports the measurement result of the downlink reference signal to the base station, and reports the attributes of the antenna that receives the downlink reference signal.

In the above steps, the embodiment of the present disclosure introduces the feature of the antenna attribute for receiving the downlink reference signal. Specifically, the antenna attribute may be the antenna panel to which the antenna receiving the downlink reference signal belongs, and/or, the receiving downlink reference signal The antenna group to which the signal's antenna belongs. For example, the antenna panel can be represented by the identification (ID) of the antenna panel, and the antenna group can be represented by the identification (ID) of the antenna group. In addition, the antenna attributes can also be represented by the first parameter that can reflect the identification of the antenna panel/antenna group. The first parameter here includes, but is not limited to, any of the SRS set, SRS resource, downlink reference signal set, downlink reference signal resource, or a set of specific beams used by the terminal.

In the embodiment of the present disclosure, the terminal may notify the base station of the attributes of the antenna that receives the downlink reference signal through an explicit indication or an implicit indication. For example, the terminal notifies the base station of the attributes of the antenna receiving the downlink reference signal through the identification of the antenna panel/antenna group, which can implement an explicit indication manner. The terminal may also notify the base station of the attributes of the antenna receiving the downlink reference signal through the first parameter that can reflect the identification of the antenna panel/antenna group. At this time, the base station needs to determine the antenna attribute according to the first parameter. , Which can realize an implicit indication.

Specifically, in an explicit indication, the terminal may send a predetermined message to the base station, and the predetermined field in the predetermined message carries the antenna attribute. For another example, when indicating in an implicit manner, the terminal may use the first parameters such as the SRS set, SRS resource, downlink reference signal set, downlink reference signal resource, or a set of specific beams used by the terminal to implicitly indicate the reception The antenna attributes of the downlink reference signal. At this time, the above-mentioned first parameter for implicitly indicating antenna attributes has a predetermined corresponding relationship with the identification of the antenna panel/antenna group, and the base station uses the SRS set, SRS resource, downlink reference signal set, A first parameter such as a downlink reference signal resource or a group of specific beams can determine the identity of the antenna panel/antenna group corresponding to the first parameter, so as to obtain the antenna attribute of the terminal for receiving the downlink reference signal.

Through the above steps, the embodiment of the present disclosure introduces the reporting of antenna panel/antenna group information during the downlink beam management process, so that the base station knows which beam the terminal uses to receive downlink reference signals (such as CSI-RS), thereby avoiding subsequent configuration failures. A problem that affects the uplink transmission performance of the terminal caused by multiple SRS sent at the same time.

In the embodiments of the present disclosure, the terminal can also report the number of antenna panels and/or the total number of antenna groups supported by the terminal to the base station. Specifically, the terminal can report the number of antenna panels through explicit or implicit instructions. And/or the total number of antenna groups.

For example, when reporting in an explicit manner, the terminal can report the number of antenna panels of the terminal N1 through the first field in the predetermined signaling message, and/or report the number of antenna panels of the terminal N1 through the second field in the predetermined signaling message The number of antenna groups is N2.

Similarly, when reporting in an implicit manner, the terminal reports the number of antenna panels of the terminal N1 and/or the number of antenna groups N2 of the terminal through the second parameter that can reflect the number of antenna panels/antenna groups. For example, the terminal may use second parameters such as SRS set, SRS resource, downlink reference signal set, downlink reference signal resource, or a group of specific beams used by the terminal to implicitly indicate the number N1 and/or the number N2. The parameter types used by the second parameter and the aforementioned first parameter may be the same or different. At this time, the above information used to implicitly indicate the number N1 and/or the number N2 has a predetermined corresponding relationship with the number N1 and/or the number N2, and the base station uses the SRS set and SRS set by the terminal. Information such as resources, downlink reference signal sets, downlink reference signal resources, or a group of specific beams can determine the number N1 and/or number N2 corresponding to the information, thereby obtaining the number of terminal antenna panels and/or the total number of antenna groups Quantity.

Optionally, before reporting the above-mentioned first and second numbers, the terminal may also determine the first bit number of the first field according to the number N1 of antenna panels of the terminal, and/or, according to the terminal’s The number of antenna groups N2 determines the second number of bits in the second field, where the first number of bits is rounded up from log_2N1, and the second number of bits is rounded up from log_2N2.

In the embodiment of the present disclosure, the above-mentioned terminal may also receive a third parameter sent by the base station, where the third parameter is used to indicate the first association relationship between the SRS and the downlink reference signal, wherein the same in the first association relationship The number of downlink reference signals under the antenna attribute does not exceed the maximum number of simultaneous transmission streams supported by the antenna attribute. Here, the third parameter may specifically be a certain predefined parameter in the RRC signaling message.

In the embodiment of the present disclosure, the terminal may determine the target downlink reference signal associated with the target SRS according to the first association relationship, and determine the transmission antenna attribute used by the target SRS according to the receiving antenna attribute of the target downlink reference signal , Wherein the target SRS is the SRS referenced by the transmission antenna attribute of the physical uplink shared channel PUSCH. Here, the receiving antenna attribute may include the antenna panel to which the receiving antenna belongs and/or the antenna group to which the receiving antenna belongs, and the transmitting antenna attribute may include the antenna panel to which the transmitting antenna belongs and/or the antenna group to which the transmitting antenna belongs.

Specifically, the terminal of the embodiment of the present disclosure may also send at least one sounding reference signal (SRS) to the base station; and then receive sounding reference signal resource indication (SRI) information, which is used to indicate the PUSCH transmit antenna attribute refers to Target SRS; and then determine the target downlink reference signal associated with the target SRS according to the first association relationship, and determine the transmission antenna attribute used by the target SRS according to the receiving antenna attribute of the target downlink reference signal, thereby achieving PUSCH transmit beam management process.

The method of the embodiment of the present disclosure is described above from the terminal side, and the following further describes from the base station side.

Referring to FIG. 6, an embodiment of the present disclosure provides a method for downlink beam management, which is applied to the base station side, and includes:

Step 61: The base station sends at least one downlink reference signal to the terminal.

Here, the downlink reference signal is a channel state information reference signal CSI-RS or a synchronization signal block SSB.

Step 62: The base station receives the measurement result of the downlink reference signal reported by the terminal, and receives the attribute of the antenna for receiving the downlink reference signal reported by the terminal.

Here, the antenna attribute may include: the identification of the antenna panel to which the antenna belongs, the identification of the antenna group to which the antenna belongs, or the first parameter that can reflect the identification of the antenna panel/antenna group. The downlink reference signal may specifically be a channel state information reference signal CSI-RS or a synchronization signal block SSB. For the specific implicit indication method, please refer to the above description, which will not be repeated here.

Specifically, the base station may receive the attributes of the antenna for receiving the downlink reference signal reported by the terminal through an explicit indication or an implicit indication. For example, the base station may receive the identification of the antenna panel/antenna group reported by the terminal to obtain the attributes of the antenna for receiving the downlink reference signal; or, the base station may use the terminal’s identification of the antenna panel/antenna group. A parameter to obtain the attributes of the antenna for receiving the downlink reference signal.

Through the above steps, the base station can obtain which beam the terminal uses to receive downlink reference signals (such as CSI-RS), thereby avoiding the problem of affecting the uplink transmission performance of the terminal caused by subsequent configuration of multiple SRSs that cannot be sent at the same time.

Optionally, the base station in the embodiment of the present disclosure may also receive the number N1 of antenna panels of the terminal reported by the terminal through the first field in the predetermined signaling message, and/or, through the first field in the predetermined signaling message. The number of antenna groups of the terminal N2 reported in the two fields.

Optionally, the base station in the embodiment of the present disclosure may also receive the number N1 of antenna panels of the terminal and/or the number N2 of antenna groups of the terminal reported by the terminal in an implicit indication manner. Specifically, the base station can obtain the number N1 of antenna panels of the terminal and/or the number N2 of antenna groups of the terminal according to the second parameter of the terminal that can reflect the number of antenna panels/antenna groups.

Optionally, the base station of the embodiment of the present disclosure may also send a third parameter to the terminal, where the third parameter is used to indicate the first association relationship between the SRS and the downlink reference signal, where the first association In the relationship, the number of downlink reference signals under the same antenna attribute does not exceed the maximum number of simultaneous transmission streams supported by the antenna attribute.

Optionally, the base station in the embodiment of the present disclosure may also receive at least one sounding reference signal (SRS) sent by the terminal; according to the at least one sounding reference signal (SRS), the transmission antenna attribute of the physical uplink shared channel PUSCH is selected. Reference target SRS; then, sounding reference signal resource indication (SRI) information is sent to the terminal, and the SRI information is used to indicate the target SRS.

It can be seen from the above that, in the method for downlink beam management in the embodiments of the present disclosure, 1) the terminal (UE) can report the number of antenna panels (Panel) or the number of antenna groups (Antenna group), and the Panel ID is introduced Or it is the Antenna group ID parameter, where the length of the above ID can be determined according to the above number. In addition, in the downlink beam management phase, the UE measures the CSI-RS, and reports the CSI-RS in which panel the UE received the CSI-RS while reporting the CSI-RS measurement value, or, in the downlink beam management phase, the UE measures the SSB and reports the SSB The measured value is also reported in which panel the UE received the SSB.

Based on the above method, the embodiment of the present disclosure is for non-codebook-based PUSCH transmission during uplink and downlink reciprocity. For example, it is assumed that the UE antenna panel capability can support 2 panels and transmit 4 streams at most. Therefore, when configuring the SRS reference signal CSI-RS, the base station can configure the CSI-RS0 and CSI-RS1 received on Panel0 to SRS0 and SRS1, and the CSI-RS2 and CSI-RS3 received on Panel2 to SRS2 and SRS3, so that the base station The parameter configuration can be performed according to the terminal capabilities, which can avoid the problem of affecting the uplink transmission performance of the terminal caused by configuring the terminal with multiple SRS that cannot be sent at the same time.

The various methods of the embodiments of the present disclosure have been described above. A device for implementing the above method will be further provided below.

The embodiment of the present disclosure provides a terminal shown in FIG. 7. Please refer to FIG. 7, an embodiment of the present disclosure provides a schematic structural diagram of a terminal 700, including:

The processor 71 is configured to measure at least one downlink reference signal sent by a base station, obtain a measurement result of the downlink reference signal, and determine an antenna attribute for receiving the downlink reference signal;

The transceiver 72 is configured to report the measurement result of the downlink reference signal and report the attributes of the antenna that receives the downlink reference signal.

Optionally, the transceiver 72 is also used to notify the attributes of the antenna receiving the downlink reference signal through the identification of the antenna panel/antenna group, or through the first parameter that can reflect the identification of the antenna panel/antenna group The base station.

Optionally, the antenna attributes include: the identification of the antenna panel to which the antenna belongs, the identification of the antenna group to which the antenna belongs, or a first parameter that can reflect the identification of the antenna panel/antenna group.

Optionally, the downlink reference signal is a channel state information reference signal CSI-RS or a synchronization signal block SSB.

Optionally, the transceiver 72 is further configured to report the number of antenna panels of the terminal N1 through the first field in the predetermined signaling message, and/or report the number of antenna panels of the terminal N1 through the second field in the predetermined signaling message The number of antenna groups is N2.

Optionally, the transceiver 72 is further configured to report the number N1 of antenna panels of the terminal and/or the number N2 of antenna groups of the terminal through a second parameter that can reflect the number of antenna panels/antenna groups.

Optionally, the processor 71 is further configured to determine the first bit number of the first field according to the number N1 of antenna panels of the terminal before reporting the number N1 and/or the number N2, and/ Or, determine the second number of bits in the second field according to the number N2 of antenna groups of the terminal, where the first number of bits is rounded up from log_2N1, and the second number of bits is rounded up from log_2N2 whole.

Optionally, the transceiver 72 is further configured to send at least one sounding reference signal SRS to the base station; receive a third parameter sent by the base station, where the third parameter is used to indicate the first association between the SRS and the downlink reference signal Relationship, wherein, in the first association relationship, the number of downlink reference signals under the same antenna attribute does not exceed the maximum number of simultaneous transmission streams supported by the antenna attribute.

Optionally, the processor 71 is further configured to determine the target downlink reference signal associated with the target SRS according to the first association relationship, and determine the target SRS according to the receiving antenna attribute of the target downlink reference signal The used transmitting antenna attribute, where the target SRS is the SRS referenced by the transmitting antenna attribute of the physical uplink shared channel PUSCH. .

Please refer to FIG. 8, another schematic structural diagram of a terminal provided by an embodiment of the present disclosure. The terminal 800 includes a processor 801, a transceiver 802, a memory 803, a user interface 804, and a bus interface.

In the embodiment of the present disclosure, the terminal 800 further includes a computer program stored in the memory 803 and capable of running on the processor 801.

The processor 801 is configured to read a program in a memory and execute the following process: measure at least one downlink reference signal sent by a base station, obtain the measurement result of the downlink reference signal, and determine the attribute of the antenna that receives the downlink reference signal ；

The transceiver 802 is configured to report the measurement result of the downlink reference signal and report the attributes of the antenna receiving the downlink reference signal.

In FIG. 8, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 801 and various circuits of the memory represented by the memory 803 are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article. The bus interface provides an interface. The transceiver 802 may be a plurality of elements, including a transmitter and a receiver, and provides a unit for communicating with various other devices on a transmission medium. For different user equipment, the user interface 804 may also be an interface capable of connecting externally and internally with the required equipment. The connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, etc.

The processor 801 is responsible for managing the bus architecture and general processing, and the memory 803 can store data used by the processor 801 when performing operations.

Optionally, the antenna attributes include: the identification of the antenna panel to which the antenna belongs, the identification of the antenna group to which the antenna belongs, or a first parameter that can reflect the identification of the antenna panel/antenna group. The downlink reference signal is a channel state information reference signal CSI-RS or a synchronization signal block SSB.

Optionally, the transceiver 802 is also used to notify the attribute of the antenna receiving the downlink reference signal through the identification of the antenna panel/antenna group, or through the first parameter that can reflect the identification of the antenna panel/antenna group The base station.

Optionally, the transceiver 802 is further configured to report the number of antenna panels of the terminal N1 through the first field in the predetermined signaling message, and/or report the number of antenna panels of the terminal N1 through the second field in the predetermined signaling message The number of antenna groups is N2.

Optionally, the transceiver 802 is further configured to report the number N1 of antenna panels of the terminal and/or the number N2 of antenna groups of the terminal through a second parameter that can reflect the number of antenna panels/antenna groups.

Optionally, the processor 801 is further configured to determine the first bit number of the first field according to the number N1 of antenna panels of the terminal before reporting the number N1 and/or the number N2, and/ Or, determine the second number of bits in the second field according to the number N2 of antenna groups of the terminal, where the first number of bits is rounded up from log_2N1, and the second number of bits is rounded up from log_2N2 whole.

Optionally, the transceiver 802 is further configured to receive a third parameter sent by the base station, where the third parameter is used to indicate a first association relationship between the SRS and the downlink reference signal, wherein the first association relationship , The number of downlink reference signals under the same antenna attribute does not exceed the maximum number of simultaneous transmission streams supported by the antenna attribute.

Optionally, the processor 801 is further configured to determine the target downlink reference signal associated with the target SRS according to the first association relationship, and determine the target SRS according to the receiving antenna attribute of the target downlink reference signal The used transmitting antenna attribute, where the target SRS is the SRS referenced by the transmitting antenna attribute of the physical uplink shared channel PUSCH.

The embodiment of the present disclosure provides a base station shown in FIG. 9. Please refer to FIG. 9, an embodiment of the present disclosure provides a schematic structural diagram of a base station 90, including a transceiver 92 and a processor 91, where:

The transceiver 92 is configured to send at least one downlink reference signal to the terminal; receive the measurement result of the downlink reference signal reported by the terminal, and receive the attribute of the antenna for receiving the downlink reference signal reported by the terminal.

Optionally, the transceiver 92 is further configured to receive the identification of the antenna panel/antenna group reported by the terminal, or obtain the reception through the first parameter of the terminal that can reflect the identification of the antenna panel/antenna group The antenna attributes of the downlink reference signal.

Optionally, the transceiver 92 is further configured to receive the number N1 of antenna panels of the terminal reported by the terminal through the first field in a predetermined signaling message, and/or, through The number of antenna groups of the terminal N2 reported in the second field.

Optionally, the transceiver 92 is further configured to obtain the number N1 of antenna panels of the terminal and/or the antenna group of the terminal according to a second parameter of the terminal that can reflect the number of antenna panels/antenna groups The number N2.

Optionally, the transceiver 92 is further configured to send a third parameter to the terminal, where the third parameter is used to indicate the first association relationship between the SRS and the downlink reference signal, wherein the first In the association relationship, the number of downlink reference signals under the same antenna attribute does not exceed the maximum number of simultaneous transmission streams supported by the antenna attribute.

Optionally, the transceiver 92 is further configured to receive at least one sounding reference signal SRS sent by the terminal;

The processor 91 is configured to select a target SRS referenced by the transmission antenna attribute of the physical uplink shared channel PUSCH according to the at least one sounding reference signal SRS; send sounding reference signal resource indication SRI information to the terminal, and the SRI The information is used to indicate the target SRS.

Please refer to FIG. 10, an embodiment of the present disclosure provides another schematic structural diagram of a base station 1000, including: a processor 1001, a transceiver 1002, a memory 1003, and a bus interface, where:

The transceiver 1002 is configured to send at least one downlink reference signal to the terminal; receive the measurement result of the downlink reference signal reported by the terminal, and receive the attribute of the antenna for receiving the downlink reference signal reported by the terminal.

In FIG. 10, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1001 and various circuits of the memory represented by the memory 1003 are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article. The bus interface provides an interface. The transceiver 1002 may be a plurality of elements, including a transmitter and a receiver, and provides a unit for communicating with various other devices on a transmission medium.

The processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1003 can store data used by the processor 1001 when performing operations.

Optionally, the transceiver 1002 is further configured to receive the identification of the antenna panel/antenna group reported by the terminal, or obtain the reception through the first parameter of the terminal that can reflect the identification of the antenna panel/antenna group The antenna attributes of the downlink reference signal. .

Optionally, the transceiver 1002 is further configured to receive the number N1 of antenna panels of the terminal reported by the terminal through the first field in a predetermined signaling message, and/or through The number of antenna groups of the terminal N2 reported in the second field.

Optionally, the transceiver 1002 is further configured to obtain the number N1 of antenna panels of the terminal and/or the antenna group of the terminal according to a second parameter of the terminal that can reflect the number of antenna panels/antenna groups The number N2.

Optionally, the transceiver 1002 is further configured to send a third parameter to the terminal, where the third parameter is used to indicate the first association relationship between the SRS and the downlink reference signal, wherein the first In the association relationship, the number of downlink reference signals under the same antenna attribute does not exceed the maximum number of simultaneous transmission streams supported by the antenna attribute.

Optionally, the transceiver 1002 is further configured to receive at least one sounding reference signal SRS sent by the terminal;

The processor 1001 is configured to read a program in a memory, and execute the following process, according to the at least one sounding reference signal SRS, to select a target SRS referenced by the transmission antenna attribute of the physical uplink shared channel PUSCH; The reference signal resource indicates SRI information, and the SRI information is used to indicate the target SRS.

Those of ordinary skill in the art may realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present disclosure.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

In the embodiments provided in the present disclosure, it should be understood that the disclosed device and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical, or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present disclosure.

In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present disclosure essentially or the part that contributes to the related technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several The instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present disclosure. The foregoing storage media include various media that can store program codes, such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above are only specific implementations of the present disclosure, but the scope of protection of the present disclosure is not limited to this, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present disclosure. It should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

A method for downlink beam management, applied to the terminal side, includes:

The terminal measures at least one downlink reference signal sent by the base station, obtains the measurement result of the downlink reference signal, and determines the attribute of the antenna that receives the downlink reference signal;

The terminal reports the measurement result of the downlink reference signal to the base station, and reports the attributes of the antenna that receives the downlink reference signal.
The method according to claim 1, wherein the reporting the attributes of the antenna for receiving the downlink reference signal comprises:

The terminal notifies the base station of the attributes of the antenna receiving the downlink reference signal through the identification of the antenna panel/antenna group or through the first parameter that can reflect the identification of the antenna panel/antenna group.
The method of claim 1, wherein:

The antenna attributes include: the identification of the antenna panel to which the antenna belongs, the identification of the antenna group to which the antenna belongs, or a first parameter that can reflect the identification of the antenna panel/antenna group.
The method according to claim 1, wherein the downlink reference signal is a channel state information reference signal CSI-RS or a synchronization signal block SSB.
The method of claim 1, further comprising:

The terminal reports the number N1 of antenna panels of the terminal through the first field in the predetermined signaling message, and/or reports the number N2 of antenna groups of the terminal through the second field in the predetermined signaling message.
The method according to claim 1, further comprising:

The terminal reports the number N1 of antenna panels of the terminal and/or the number N2 of antenna groups of the terminal through the second parameter that can reflect the number of antenna panels/antenna groups.
The method according to claim 5 or 6, wherein, before reporting the number N1 and/or the number N2, the method further comprises:

The terminal determines the first number of bits in the first field according to the number N1 of antenna panels of the terminal, and/or determines the second number of bits in the second field according to the number N2 of antenna groups of the terminal , Wherein the first number of bits is rounded up from log_2N1, and the second number of bits is rounded up from log_2N2.
The method according to any one of claims 1 to 6, further comprising:

Receiving a third parameter sent by the base station, where the third parameter is used to indicate a first association relationship between the SRS and the downlink reference signal, wherein, in the first association relationship, the number of downlink reference signals under the same antenna attribute, Do not exceed the maximum number of simultaneous transmission streams supported by the antenna attribute.
The method of claim 8, further comprising:

According to the first association relationship, the target downlink reference signal associated with the target SRS is determined, and the transmitting antenna attribute used by the target SRS is determined according to the receiving antenna attribute of the target downlink reference signal, wherein the target SRS is a physical uplink The SRS referred to by the transmit antenna attribute of the shared channel PUSCH.
A method for downlink beam management, applied to the base station side, includes:

Sending at least one downlink reference signal to the terminal;

Receiving the measurement result of the downlink reference signal reported by the terminal, and receiving the antenna attribute for receiving the downlink reference signal reported by the terminal.
The method according to claim 10, wherein the receiving the attributes of the antenna reported by the terminal for receiving the downlink reference signal comprises:

Receiving the identification of the antenna panel/antenna group reported by the terminal, or obtaining the antenna attribute for receiving the downlink reference signal through the first parameter of the terminal that can reflect the identification of the antenna panel/antenna group.
The method according to claim 10, wherein the antenna attributes include: the identity of the antenna panel to which the antenna belongs, the identity of the antenna group to which the antenna belongs, or a first parameter that can reflect the identity of the antenna panel/antenna group.
The method according to claim 10, wherein the downlink reference signal is a channel state information reference signal CSI-RS or a synchronization signal block SSB.
The method of claim 10, further comprising:

Receive the number of antenna panels of the terminal N1 reported by the terminal through the first field in the predetermined signaling message, and/or the number of antenna groups of the terminal reported through the second field in the predetermined signaling message N2.
The method of claim 10, further comprising:

According to the second parameter of the terminal that can reflect the number of antenna panels/antenna groups, the number N1 of antenna panels of the terminal and/or the number N2 of antenna groups of the terminal are obtained.
The method according to claim 14 or 15, further comprising:

Send a third parameter to the terminal, where the third parameter is used to indicate the first association relationship between the SRS and the downlink reference signal, wherein, in the first association relationship, the number of downlink reference signals under the same antenna attribute The number does not exceed the maximum number of simultaneous transmission streams supported by the antenna attribute.
The method of claim 10, further comprising:

Receiving at least one sounding reference signal SRS sent by the terminal;

Selecting, according to the at least one sounding reference signal SRS, a target SRS referenced by the transmission antenna attribute of the physical uplink shared channel PUSCH;

Send sounding reference signal resource indication SRI information to the terminal, where the SRI information is used to indicate the target SRS.
A terminal, including:

A processor, configured to measure at least one downlink reference signal sent by a base station, obtain a measurement result of the downlink reference signal, and determine an antenna attribute for receiving the downlink reference signal;

The transceiver is used to report the measurement result of the downlink reference signal and report the attributes of the antenna receiving the downlink reference signal.
The terminal according to claim 18, wherein:

The transceiver is also used to notify the base station of the attributes of the antenna receiving the downlink reference signal through the identification of the antenna panel/antenna group, or through the first parameter that can reflect the identification of the antenna panel/antenna group.
The terminal according to claim 18, wherein:

The antenna attributes include: the identification of the antenna panel to which the antenna belongs, the identification of the antenna group to which the antenna belongs, or a first parameter that can reflect the identification of the antenna panel/antenna group.
The terminal according to claim 18, wherein the downlink reference signal is a channel state information reference signal CSI-RS or a synchronization signal block SSB.
The terminal according to claim 18, wherein:

The transceiver is also configured to report the number of antenna panels of the terminal N1 through the first field in a predetermined signaling message, and/or report the number of antenna groups of the terminal through the second field in the predetermined signaling message N2.
The terminal according to claim 18, wherein:

The transceiver is also used to report the number N1 of antenna panels of the terminal and/or the number N2 of antenna groups of the terminal through a second parameter that can reflect the number of antenna panels/antenna groups.
The terminal according to claim 22 or 23, wherein:

The processor is further configured to determine the first bit number of the first field according to the number N1 of antenna panels of the terminal before reporting the number N1 and/or the number N2, and/or, according to the number N1 of the terminal The number of antenna groups N2 is determined to determine the second number of bits in the second field, where the first number of bits is rounded up from log_2N1, and the second number of bits is rounded up from log_2N2.
The terminal according to any one of claims 18 to 23, wherein:

The transceiver is further configured to receive a third parameter sent by the base station, where the third parameter is used to indicate a first association relationship between the SRS and the downlink reference signal, wherein, in the first association relationship, the same antenna attribute The number of downlink reference signals below does not exceed the maximum number of simultaneous transmission streams supported by the antenna attribute.
The terminal according to claim 25, wherein:

The processor is further configured to determine the target downlink reference signal associated with the target SRS according to the first association relationship, and determine the transmission antenna attribute used by the target SRS according to the receiving antenna attribute of the target downlink reference signal , Wherein the target SRS is the SRS referenced by the transmission antenna attribute of the physical uplink shared channel PUSCH.
A base station, including:

The transceiver is configured to send at least one downlink reference signal to the terminal; and to receive the measurement result of the downlink reference signal sent by the terminal, and to receive the attribute of the antenna for receiving the downlink reference signal reported by the terminal.
The base station according to claim 27, wherein:

The transceiver is also used to receive the identification of the antenna panel/antenna group reported by the terminal, or obtain and receive the downlink reference signal through the first parameter of the terminal that can reflect the identification of the antenna panel/antenna group Antenna properties.
The base station according to claim 27, wherein the antenna attribute comprises: an identification of the antenna panel to which the antenna belongs, an identification of an antenna group to which the antenna belongs, or a first parameter that can reflect the identification of the antenna panel/antenna group.
The base station according to claim 27, wherein the downlink reference signal is a channel state information reference signal CSI-RS or a synchronization signal block SSB.
The base station according to claim 27, wherein:

The transceiver is also configured to receive the number N1 of antenna panels of the terminal reported by the terminal through the first field in the predetermined signaling message, and/or the number of antenna panels reported by the terminal through the second field in the predetermined signaling message The number of antenna groups of the terminal N2.
The base station according to claim 27, wherein:

The transceiver is also configured to obtain the number N1 of antenna panels of the terminal and/or the number N2 of antenna groups of the terminal according to the second parameter of the terminal that can reflect the number of antenna panels/antenna groups.
The base station according to claim 31 or 32, wherein:

The transceiver is further configured to send a third parameter to the terminal, where the third parameter is used to indicate a first association relationship between the SRS and the downlink reference signal, wherein the same in the first association relationship The number of downlink reference signals under the antenna attribute does not exceed the maximum number of simultaneous transmission streams supported by the antenna attribute.
The base station according to claim 27, wherein:

The transceiver is also configured to receive at least one sounding reference signal SRS sent by the terminal;

The base station also includes:

The processor is configured to select a target SRS referenced by the transmission antenna attribute of the physical uplink shared channel PUSCH according to the at least one sounding reference signal SRS; send sounding reference signal resource indication SRI information to the terminal, and the SRI information is used for Indicates the target SRS.
A communication device, comprising: a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and when the computer program is executed by the processor, it can implement any one of claims 1 to 17 The steps of the method for downlink beam management.
A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the downlink beam management according to any one of claims 1 to 17 is realized Steps of the method.