CN113972935B

CN113972935B - Method for reporting terminal capability information, terminal and base station

Info

Publication number: CN113972935B
Application number: CN202010710307.6A
Authority: CN
Inventors: 楼梦婷; 金婧; 夏亮; 王启星; 刘光毅
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2023-01-10
Anticipated expiration: 2040-07-22
Also published as: CN113972935A

Abstract

A method for reporting terminal capability information, a terminal and a base station are provided, the method comprises: determining an oversampling factor of the terminal according to an overlapping transmission data stream capability of a base station, an oversampling capability of the terminal, and a first parameter related to a receiving capability; and updating the rank parameter of the downlink channel matrix according to the oversampling factor, and sending the updated rank parameter to the base station. According to the method for reporting the terminal capability information, the terminal and the base station provided by the embodiment of the invention, the terminal updates and reports the rank parameter of the downlink channel matrix, so that the base station can obtain the updated rank parameter, the updated rank parameter takes the oversampling capability of the terminal into consideration, the receiving capability information of the terminal can be more accurately reflected, and the base station can configure appropriate sending parameters for the terminal according to the information to obtain additional spatial multiplexing gain and virtual diversity receiving gain.

Description

Method for reporting terminal capability information, terminal and base station

Technical Field

The invention relates to the technical field of mobile communication, in particular to a method for reporting terminal capability information, a terminal and a base station.

Background

Multiple-input multiple-output (MIMO) is a key technology of a long term evolution/fifth generation mobile communication (LTE/5G) system. By configuring a plurality of transmitting antennas and receiving antennas at the transceiving end, the MIMO technology can fully utilize space resources, and can improve the system channel capacity and the spectrum utilization rate by times under the condition of not increasing spectrum resources and antenna transmitting power. With the explosive growth of traffic and the continuous expansion pressure, MIMO will also be the key core technology of the next generation mobile communication system (6G).

In the LTE/5G MIMO system, the Rank (Rank) of the transmission channel matrix characterizes the correlation among a plurality of transmission channels between the transmitting end and the receiving end. For a communication system in which uplink and downlink do not satisfy reciprocity, one of important contents reported by terminal capability is Rank Indication (RI) of MIMO channel matrix. As shown in fig. 1, the base station synchronously transmits pilot signals through multiple antennas (S11), and the terminal obtains a downlink channel matrix H by detecting the pilot signals _DL (S12), calculating the rank RI of the downlink channel matrix HDL and reporting to the base station (S13), the base station can obtain the correlation of the current wireless channel environment according to the reported RI, and configures parameters such as the number of transmission layers for the terminal (S14), and then schedules the current downlink traffic channel to decide whether to transmit MIMO signals of a plurality of code words or transmit diversity signals of a single code word through transmit diversity. The subsequent base station synchronously transmits data and demodulation reference signals through multiple antennas (S15), and the terminal detects the data (S16), wherein the data is not sampled according to an oversampling mode during detection.

For the requirement of higher system capacity of 6G, the virtual antenna technology develops a new idea for continuously improving the MIMO space multiplexing capability by transforming a transmission channel matrix. The process of obtaining and reporting the virtual antenna system RI is shown in fig. 2, where the base station synchronously sends pilot signals through multiple antennas (S21), and the terminal obtains the downlink channel matrix H by detecting the pilot signals _DL (S22), calculating the rank RI of the downlink channel matrix HDL and reporting to the base station (S23), the base station can obtain the correlation of the current wireless channel environment according to the reported RI, and configures parameters such as the number of transmission layers for the terminal (S24), and then schedules the current downlink traffic channel to decide whether to transmit MIMO signals of a plurality of code words or transmit diversity signals of a single code word through transmit diversity. Rear endThe base station asynchronously transmits data and demodulation reference signals through multiple antennas (S25), and the terminal detects the data (S26), wherein the data is sampled according to an oversampling mode during detection.

In the virtual antenna system, a base station end introduces an overlapping sending factor A, so that each transmitting antenna asynchronously sends a transmitting signal at equal interval time delay 1/A; and introducing an oversampling factor B into a receiving end, and performing oversampling processing on a received signal to obtain B-1 virtual receiving antennas, wherein the dimensionality of a transmission channel matrix is changed due to the oversampling processing. Through the above process, the terminal in the virtual antenna system forms a plurality of virtual receiving antennas, so the number of resolvable data streams will not be less than the number of physical antennas thereof, and thus additional spatial multiplexing gain and virtual diversity receiving gain are obtained. In addition, to ensure system robustness, asynchronous and oversampling processing is only applied to data and demodulation reference signals, and pilot signals are still synchronized without oversampling processing.

In the prior art, the number of base station physical antennas (sometimes referred to as actual antenna number herein) in an LTE/5G MIMO system is generally much larger than the number of terminal physical antennas, and a terminal is limited by volume and power, and usually only has 4 physical antennas at most, and generally only has 2 physical antennas. For a single terminal, the data stream which can be received at most is 4-stream data, but it is difficult to exceed 2-stream data in actual test, so the RI reported by a single terminal generally does not exceed 2.

When the virtual antenna system performs downlink transmission, asynchronous and oversampling processing needs to be performed on data and demodulation reference signals, and theoretically, the maximum receiving stream number of a single terminal can be increased by constructing a virtual channel matrix, so that extra spatial multiplexing gain and virtual diversity receiving gain are obtained. In order to ensure robustness, the pilot signal is sent in a synchronous and non-over-sampling mode, so that when the terminal acquires the RI according to the current mode, the upper limit of the RI still does not exceed the minimum value of the actual physical antenna number of the sending end and the receiving end. This means that when the base station performs downlink scheduling, the number of codewords allocated to the terminal does not exceed the RI reported by the terminal, i.e., does not exceed the minimum value of the actual number of physical antennas at the transmitting and receiving ends, and therefore, the effect of obtaining additional spatial multiplexing gain and virtual diversity reception gain cannot be achieved.

Disclosure of Invention

At least one embodiment of the present invention provides a method for reporting terminal capability information, a terminal and a network device, which can obtain more accurate terminal capability information, thereby providing support for obtaining spatial multiplexing gain and virtual diversity reception gain of data transmission.

According to an aspect of the present invention, at least one embodiment provides a method for reporting terminal capability information, which is applied to a terminal, and includes:

determining an oversampling factor of the terminal according to an overlapping transmission data stream capability of a base station, an oversampling capability of the terminal, and a first parameter related to a receiving capability;

and updating the rank parameter of the downlink channel matrix according to the oversampling factor, and sending the updated rank parameter to the base station.

Further, in accordance with at least one embodiment of the present invention, before determining the oversampling factor for the terminal, the method further comprises:

and acquiring the capability of overlapping data stream transmission of the base station.

Furthermore, according to at least one embodiment of the present invention, the step of acquiring the capability of overlapping transmission data streams of the base station includes:

acquiring the capability of overlapping data flow transmission of the base station from pre-configuration information locally stored by a terminal;

or receiving configuration information sent by a base station, and acquiring the overlapping data flow sending capability of the base station from the configuration information, wherein the configuration information is sent through a system message, a Radio Resource Control (RRC) signaling or Downlink Control Information (DCI).

Further, according to at least one embodiment of the present invention, the overlapping transmission data flow capability of the base station is a total flow number of the overlapping transmission data flows of the base station, or a flow number of the overlapping transmission data flows allocated to the terminal by the base station;

the oversampling capacity of the terminal is the maximum value of the oversampling multiple supported by the terminal;

the first parameter related to the receiving capability of the terminal is the total number of receiving antennas of the terminal or the number of antennas used for receiving by the terminal.

Furthermore, according to at least one embodiment of the present invention, the step of determining an oversampling factor of the terminal according to an overlapping transmission data stream capability of a base station, an oversampling capability of the terminal, and a first parameter related to a receiving capability includes:

the oversampling factor is the minimum of the overlapping transmission data flow capability of the base station and the oversampling capability of the terminal, if the overlapping transmission data flow capability of the base station is greater than the first parameter of the terminal related to the receiving capability;

and under the condition that the capability of the base station for overlapping and sending the data streams is not greater than the first parameter related to the receiving capability of the terminal, the oversampling factor takes the value of 1.

Furthermore, according to at least one embodiment of the present invention, the step of updating a rank parameter of a downlink channel matrix according to the oversampling factor includes:

and calculating the product of the oversampling factor and the rank parameter of the downlink channel matrix, and taking the product as the updated rank parameter.

and receiving a pilot signal sent by a base station, and calculating to obtain a downlink channel matrix and a rank parameter of the downlink channel matrix according to the pilot signal.

According to another aspect of the present invention, at least one embodiment provides a method for receiving terminal capability information, applied to a base station, including:

receiving the rank parameter of the updated downlink channel matrix sent by the terminal;

the updated rank parameter of the downlink channel matrix is obtained by updating the rank parameter of the downlink channel matrix according to an oversampling factor, and the oversampling factor is determined according to the capability of the base station to transmit data streams in an overlapping manner, the oversampling capability of the terminal, and a first parameter related to the receiving capability.

Further, in accordance with at least one embodiment of the present invention, the method further comprises:

and sending configuration information for indicating the capability of the base station for overlapping data stream transmission through a system message, a Radio Resource Control (RRC) signaling or Downlink Control Information (DCI).

Further, according to at least one embodiment of the present invention, in a case that the overlapping transmission data flow capability of the base station is greater than the first parameter of the terminal related to the receiving capability, the oversampling factor is the minimum of the overlapping transmission data flow capability of the base station and the oversampling capability of the terminal;

Furthermore, in accordance with at least one embodiment of the present invention, the updated rank parameter is a product of the oversampling factor and a rank parameter of the downlink channel matrix.

Furthermore, according to at least one embodiment of the present invention, before receiving the rank parameter of the updated downlink channel matrix sent by the terminal, the method further includes: a pilot signal is transmitted to the terminal.

According to another aspect of the present invention, at least one embodiment provides a terminal comprising a transceiver and a processor, wherein,

the processor is configured to determine an oversampling factor of the terminal according to an overlapping transmission data stream capability of a base station, an oversampling capability of the terminal, and a first parameter related to a reception capability; updating the rank parameter of the downlink channel matrix according to the oversampling factor;

the transceiver is configured to send the updated rank parameter to a base station.

Further, in accordance with at least one embodiment of the present invention, the processor is further configured to: the oversampling factor is the minimum of the overlapping transmission data flow capability of the base station and the oversampling capability of the terminal when the overlapping transmission data flow capability of the base station is greater than the first parameter of the terminal related to the receiving capability; and under the condition that the capability of the base station for overlapping and sending the data streams is not greater than the first parameter related to the receiving capability of the terminal, the oversampling factor takes the value of 1.

Further, in accordance with at least one embodiment of the present invention, the processor is further configured to: and calculating the product of the oversampling factor and the rank parameter of the downlink channel matrix, and taking the product as the updated rank parameter.

According to another aspect of the present invention, at least one embodiment provides a terminal, including: the terminal capability information reporting method comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein the program realizes the steps of the terminal capability information reporting method when being executed by the processor.

In accordance with another aspect of the invention, at least one embodiment provides a base station, comprising a transceiver and a processor, wherein,

the processor is used for receiving the rank parameter of the updated downlink channel matrix sent by the terminal;

Further in accordance with at least one embodiment of the present invention, the transceiver is configured to transmit a pilot signal to a terminal.

According to another aspect of the present invention, at least one embodiment provides a base station, including: the terminal capability information reporting method comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein the program realizes the steps of the terminal capability information reporting method when being executed by the processor.

According to another aspect of the invention, at least one embodiment provides a computer readable storage medium having a program stored thereon, which when executed by a processor, performs the steps of the method as described above.

Compared with the prior art, the method for reporting terminal capability information, the terminal and the base station provided by the embodiment of the invention have the advantages that the terminal updates and reports the rank parameter of the downlink channel matrix, so that the base station can obtain the updated rank parameter, the updated rank parameter takes the oversampling capability of the terminal into account, the first parameter information related to the receiving capability of the terminal can be more accurately reflected, and the base station can configure the proper sending parameter for the terminal according to the first parameter information to obtain the additional spatial multiplexing gain and the virtual diversity receiving gain.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic diagram of RI acquisition and reporting processes of an LTE/5G MIMO system in the prior art;

fig. 2 is a schematic diagram of RI acquisition and reporting processes of a virtual antenna system in the prior art;

FIG. 3 is a schematic diagram of an application scenario according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a method for reporting terminal capability information according to an embodiment of the present invention, when the method is applied to a terminal;

fig. 5 is a flowchart illustrating a method for reporting terminal capability information according to an embodiment of the present invention, when applied to a base station;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 9 is another schematic structural diagram of a base station according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. In the description and in the claims "and/or" means at least one of the connected objects.

The techniques described herein are not limited to NR systems and Long Time Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), single carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.21 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A and GSM are described in the literature from an organization named "third Generation Partnership project" (3 rd Generation Partnership project,3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3 GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes the NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.

The following description provides examples, and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Referring to fig. 3, fig. 3 is a block diagram of a wireless communication system to which an embodiment of the present invention is applicable. The wireless communication system includes a terminal 31 and a network device 32. The terminal 31 may also be referred to as a User terminal or a User Equipment (UE), where the terminal 31 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and the specific type of the terminal 31 is not limited in the embodiment of the present invention. The network device 32 may be a Base Station and/or a core network element, wherein the Base Station may be a 5G or later-version Base Station (e.g., a gNB, a 5G NRNB, etc.), or a Base Station in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), where the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that the Base Station in the NR system is only taken as an example in the embodiment of the present invention, but the specific type of the Base Station is not limited.

The base stations may communicate with the terminals 31 under the control of a base station controller, which may be part of the core network or some of the base stations in various examples. Some base stations may communicate control information or user data with the core network through a backhaul. In some examples, some of these base stations may communicate with each other directly or indirectly over backhaul links, which may be wired or wireless communication links. A wireless communication system may support operation on multiple carriers (waveform signals of different frequencies). A multi-carrier transmitter can transmit modulated signals on the multiple carriers simultaneously. For example, each communication link may be a multi-carrier signal modulated according to various radio technologies. Each modulated signal may be transmitted on a different carrier and may carry control information (e.g., reference signals, control channels, etc.), overhead information, data, and so on.

The base stations may communicate wirelessly with the terminals 31 via one or more access point antennas. Each base station may provide communication coverage for a respective coverage area. The coverage area of an access point may be divided into sectors that form only a portion of the coverage area. A wireless communication system may include base stations of different types (e.g., macro, micro, or pico base stations). The base stations may also utilize different radio technologies, such as cellular or WLAN radio access technologies. The base stations may be associated with the same or different access networks or operator deployments. The coverage areas of different base stations (including coverage areas of base stations of the same or different types, coverage areas utilizing the same or different radio technologies, or coverage areas belonging to the same or different access networks) may overlap.

The communication links in a wireless communication system may comprise an Uplink for carrying Uplink (UL) transmissions (e.g., from terminal 31 to network device 32) or a Downlink for carrying Downlink (DL) transmissions (e.g., from network device 32 to terminal 31). The UL transmission may also be referred to as reverse link transmission, while the DL transmission may also be referred to as forward link transmission. Downlink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both. Similarly, uplink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both.

As described in the background art, in the prior art, the upper limit of the RI reported by the terminal does not exceed the minimum value of the actual physical antenna number of the transmitting end and the receiving end, so that the number of the codewords allocated to the terminal by the network does not exceed the RI reported by the terminal, that is, does not exceed the minimum value of the actual physical antenna number of the transmitting and receiving ends, and thus, the effect of obtaining additional spatial multiplexing gain and virtual diversity reception gain cannot be achieved. In order to solve at least one of the above problems, embodiments of the present invention provide a method for reporting terminal capability information, which can more accurately evaluate and report the terminal capability, and provide support for obtaining additional spatial multiplexing gain and virtual diversity reception gain.

Referring to fig. 4, the method for reporting terminal capability information according to the embodiment of the present invention, when applied to a terminal side, includes:

step 41, determining an oversampling factor of the terminal according to the capability of the base station for overlapping transmission data streams, the oversampling capability of the terminal, and the first parameter related to the receiving capability.

Here, the overlapping transmission data flow capability of the base station refers to a maximum number of flows that the base station performs overlapping transmission in an asynchronous manner, and specifically may be a total number of flows that the base station performs overlapping transmission of data flows, or a number of flows that the base station allocates to the overlapping transmission data flows of the terminal. And the oversampling capacity of the terminal is the maximum value of the oversampling multiple supported by the terminal. Generally, the oversampling multiple supported by the terminal is determined by the hardware capability of the terminal itself, and the maximum value of the oversampling multiple supported by the terminal may be preset according to the hardware capability of the terminal itself. The first parameter related to the receiving capability of the terminal may specifically be the total number of receiving antennas of the terminal or the number of antennas used by the terminal for receiving. Generally, the number of antennas used for reception by a terminal is less than or equal to the total number of receive antennas of the terminal.

As an implementation manner of the embodiment of the present invention, in step 41, in a case that the overlapping transmission data flow capability of the base station is greater than the first parameter of the terminal, the oversampling factor may be the minimum of the overlapping transmission data flow capability of the base station and the oversampling capability of the terminal; and under the condition that the capability of the base station for overlapping the sending data streams is not greater than the first parameter of the terminal, the oversampling factor takes a value of 1.

And 42, updating the rank parameter of the downlink channel matrix according to the oversampling factor, and sending the updated rank parameter to the base station.

Here, after obtaining the rank parameter of the downlink channel matrix, the terminal updates the rank parameter in step 42, so as to obtain an updated rank parameter. Specifically, in the embodiment of the present invention, a product of the oversampling factor and the rank parameter of the downlink channel matrix may be calculated, and the product is used as the updated rank parameter.

Through the above steps, the embodiment of the present invention may update the rank parameter of the downlink channel matrix by using the oversampling factor, and in the case that the capability of overlapping transmission data stream of the base station is greater than the first parameter of the terminal, the oversampling factor may be the minimum of the capability of overlapping transmission data stream of the base station and the oversampling capability of the terminal, so that the oversampling factor may be set according to the oversampling capability of the terminal, and is no longer limited by the number of physical antennas of the terminal. The oversampling factor takes the oversampling capacity of the terminal into consideration, so that the receiving capacity information of the terminal can be more accurately reflected, a network side can conveniently configure a proper sending parameter for the terminal, and support is provided for obtaining extra space multiplexing gain and virtual diversity receiving gain of data transmission.

According to at least one embodiment of the present invention, before step 41, the terminal may further obtain information of capability of the base station to overlap transmitting data streams. Specifically, the terminal may obtain the capability of overlapping data flow transmission of the base station from the pre-configuration information stored locally. Or, the terminal receives configuration information transmitted by a base station, and acquires the overlapping transmission data flow capability of the base station from the configuration information, wherein the configuration information may be transmitted by a system message, radio Resource Control (RRC) signaling, or Downlink Control Information (DCI). The base station can periodically count the capability of the overlapped sending data stream, and when the capability of the overlapped sending data stream is updated, the configuration information carrying the updated capability of the overlapped sending data stream is sent to the terminal, so that the terminal can update the capability of the overlapped sending data stream of the base station in time, and then the steps 41 to 42 are executed again to update the rank parameter and send the updated rank parameter to the base station, so as to ensure that the capability information of the terminal can be changed in time along with the change of the system.

According to at least one embodiment of the present invention, before step 41, the terminal may further receive a pilot signal sent by the base station, and according to the pilot signal, the terminal may calculate to obtain a downlink channel matrix and a rank parameter of the downlink channel matrix. Assuming that the downlink channel matrix is an n × m matrix, the rank parameter is usually not greater than the minimum of n and m, which represent the number of receiving antennas and the number of transmitting antennas, respectively. The rank parameter is then updated in step 42.

Referring to fig. 5, a method for reporting terminal capability information according to an embodiment of the present invention, when applied to a base station, includes:

and step 51, receiving the updated rank parameter of the downlink channel matrix sent by the terminal.

Here, the updated rank parameter of the downlink channel matrix is obtained by updating the rank parameter of the downlink channel matrix according to an oversampling factor, where the oversampling factor is determined according to an overlapping data stream transmission capability of a base station, an oversampling capability of the terminal, and a first parameter related to a reception capability. Specifically, the overlapping transmission data flow capability of the base station may be a total flow number of the overlapping transmission data flows of the base station, or a flow number of the overlapping transmission data flows allocated to the terminal by the base station. The oversampling capability of the terminal may be a maximum value of the oversampling multiples supported by the terminal. The first parameter related to the receiving capability of the terminal may be a total number of receiving antennas of the terminal or a number of antennas used for receiving by the terminal.

In this embodiment of the present invention, when the overlapping transmission data flow capability of the base station is greater than the first parameter of the terminal, the oversampling factor is the minimum of the overlapping transmission data flow capability of the base station and the oversampling capability of the terminal; and under the condition that the capability of the base station for overlapping and sending the data streams is not greater than the first parameter of the terminal, the oversampling factor takes the value of 1. The updated rank parameter may specifically be a product of the oversampling factor and a rank parameter of the downlink channel matrix.

Through the steps, the base station can obtain the updated rank parameter, the updated rank parameter can reflect the receiving capability information of the terminal more accurately due to the fact that the oversampling capability of the terminal is considered, and the base station can configure the appropriate sending parameter for the terminal according to the updated rank parameter so as to obtain the additional spatial multiplexing gain and the virtual diversity receiving gain.

In addition, according to at least one embodiment of the present invention, the base station may further transmit configuration information indicating the overlapping transmission data flow capability of the base station through a system message, RRC signaling, or to assist the terminal to acquire the information of the overlapping transmission data flow capability of the base station. As another implementation manner, sending, by a system message, radio resource control RRC signaling, or downlink control information DCI, the overlapping transmission data flow capability information used for indicating the base station may also be predefined, for example, configured in a local configuration file of the terminal in advance, so that the terminal may directly obtain the overlapping transmission data flow capability information of the base station from the configuration file.

In addition, according to at least one embodiment of the present invention, before the step 51, the base station may further transmit a pilot signal to the terminal. The base station sends the pilot signal, and the terminal detects the pilot signal sent by the base station, so that the downlink channel matrix can be estimated, and the downlink channel matrix and the rank parameter thereof can be obtained.

Various methods of embodiments of the present invention have been described above. To facilitate a better understanding of the above, several specific application examples of embodiments of the present invention are provided below.

The first example is as follows:

let a be the total flow rate of overlapped transmissions by the base station, B be the terminal oversampling capability, C be the number of antennas received by the terminal (the first parameter described above), S be the oversampling factor, and RI _ real be the rank parameter of the updated downlink channel matrix.

For example, a =16, b =8, C =1, if the MIMO terminal capability reporting scheme in the prior art is adopted, the reported rank parameter is the rank of the actual channel matrix, that is, the smaller value of a and C is 1, which results in that the maximum number of downlink traffic transmission streams of the terminal is 1; if the scheme provided by the embodiment of the invention is adopted, because A is larger than C, A is larger than B, and S takes the minimum value of A, B of 8, RI _ real reported by the terminal is the product of the rank of the actual channel matrix and 8, thereby being beneficial to realizing spatial multiplexing of a virtual antenna system.

Further, when the base station finds that a changes through statistics data of a period of time, the base station may update a and send the updated a to the terminal, so as to re-determine and report the terminal capability (i.e. the rank parameter).

Example two:

suppose a is the total flow number of the overlapping transmission of the base station, B is the terminal oversampling capability, C is the number of the receiving antennas of the terminal, S is the oversampling factor, and RI _ real is the rank parameter of the updated downlink channel matrix.

For example, a =16, B =32, C =1, if the scheme of determining S according to the embodiment of the present invention is adopted, since a is greater than C and B is greater than a, although the terminal oversampling capability is higher, since the total flow of data that can be transmitted by overlapping the system is limited, the higher oversampling factor has little meaning to the system gain, and brings additional increases in complexity and power consumption. Therefore, through the constraint relationship between S and A, B, it can be avoided that the terminal adopts an excessively high oversubscription factor, that is, S takes the minimum value 16 in A, B, and RI _ real reported by the terminal capability is the product of the rank and 16 of the actual channel matrix.

Example three:

suppose a is the number of overlapping transmission streams allocated to each terminal by the base station, B is the terminal oversampling capability, C is the number of receiving antennas (first parameter) of the terminal, S is the oversampling factor, and RI _ real is the rank parameter of the updated downlink channel matrix.

For example, a =4, b =2, C =1, if the scheme of determining S in the embodiment of the present invention is adopted, since a is greater than C, S takes the minimum value 2 in A, B, and RI _ real reported by the terminal capability is a product of the rank of the actual channel matrix and 2.

Example four:

For example, a =4, B =8, C =1, if the scheme of determining S in the embodiment of the present invention is adopted, since a is greater than C and B is greater than a, S takes the minimum value of 4 in A, B, and RI _ real reported by the terminal capability is the product of the rank of the actual channel matrix and 4.

Example five:

For example, a =4, b =2, and C =4, if the scheme of determining S in the embodiment of the present invention is adopted, since a is not greater than C, which indicates that the receiving capability of the terminal is strong, it is not necessary to adopt too much, and a better performance can be achieved, so that S takes 1, and RI _ real reported by the capability of the terminal is a product of the rank of the actual channel matrix and 1.

Various methods of embodiments of the present invention have been described above. An apparatus for carrying out the above method is further provided below.

Referring to fig. 6, an embodiment of the present invention provides a terminal 60, including:

a processor 61, configured to determine an oversampling factor for the terminal according to an overlapping transmission data stream capability of a base station, an oversampling capability of the terminal, and a first parameter related to a receiving capability; updating the rank parameter of the downlink channel matrix according to the oversampling factor;

the transceiver 62 is configured to send the updated rank parameter to the base station.

Through the modules, the terminal of the embodiment of the invention can send more accurate terminal capability information to the network, thereby providing support for obtaining the spatial multiplexing gain and the virtual diversity reception gain of data transmission.

Optionally, the processor is further configured to obtain a capability of a base station for overlapping data stream transmission before determining the oversampling factor of the terminal.

Optionally, the processor is further configured to:

or receiving configuration information sent by a base station, and acquiring the capability of overlapping data stream sending of the base station from the configuration information, wherein the configuration information is sent through a system message, a Radio Resource Control (RRC) signaling or a Downlink Control Information (DCI).

Optionally, the overlapping sending data flow capability of the base station is a total flow number of overlapping sending data flows of the base station, or a flow number of overlapping sending data flows allocated to the terminal by the base station;

Optionally, the processor is further configured to: the oversampling factor is the minimum of the overlapping transmission data flow capability of the base station and the oversampling capability of the terminal when the overlapping transmission data flow capability of the base station is greater than the first parameter of the terminal related to the receiving capability; and under the condition that the capability of the base station for overlapping the sending data streams is not greater than a first parameter related to the receiving capability of the terminal, the oversampling factor takes the value of 1.

Optionally, the processor is further configured to: and calculating the product of the oversampling factor and the rank parameter of the downlink channel matrix, and taking the product as the updated rank parameter.

Optionally, the transceiver is further configured to receive a pilot signal sent by a base station before determining an oversampling factor of the terminal, and calculate a downlink channel matrix and a rank parameter of the downlink channel matrix according to the pilot signal.

It should be noted that the apparatus in this embodiment is an apparatus corresponding to the method shown in fig. 4, and the implementation manners in the above embodiments are all applicable to the embodiment of the apparatus, and the same technical effects can be achieved. The apparatus provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are not repeated here.

Referring to fig. 7, a schematic structural diagram of a terminal according to an embodiment of the present invention is shown, where the terminal 700 includes: a processor 701, a transceiver 702, a memory 703, a user interface 704 and a bus interface.

In this embodiment of the present invention, the terminal 700 further includes: programs stored on the memory 703 and executable on the processor 701.

The processor 701 implements the following steps when executing the program: '

Optionally, the processor further implements the following steps when executing the program: and acquiring the capability of overlapping data stream transmission of the base station before determining the oversampling factor of the terminal.

Optionally, the processor further implements the following steps when executing the program:

the oversampling factor is the minimum of the overlapping transmission data flow capability of the base station and the oversampling capability of the terminal when the overlapping transmission data flow capability of the base station is greater than the first parameter of the terminal related to the receiving capability;

before the oversampling factor of the terminal is determined, receiving a pilot signal sent by a base station, and calculating to obtain a downlink channel matrix and a rank parameter of the downlink channel matrix according to the pilot signal.

It can be understood that, in the embodiment of the present invention, when being executed by the processor 701, the computer program can implement each process of the above-mentioned reporting method embodiment of the terminal capability information shown in fig. 4, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

In fig. 7, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 701, and various circuits, represented by memory 703, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 702 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 704 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 701 is responsible for managing the bus architecture and general processing, and the memory 703 may store data used by the processor 701 in performing operations.

It should be noted that the terminal in this embodiment is a terminal corresponding to the method shown in fig. 4, and the implementation manners in the above embodiments are all applied to the embodiment of the terminal, and the same technical effects can be achieved. In the terminal, the transceiver 702 and the memory 703, and the transceiver 702 and the processor 701 may be communicatively connected through a bus interface, and the functions of the processor 701 may also be implemented by the transceiver 702, and the functions of the transceiver 702 may also be implemented by the processor 701. It should be noted that, the terminal provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

In some embodiments of the invention, there is also provided a computer readable storage medium having a program stored thereon, which when executed by a processor, performs the steps of:

When being executed by the processor, the program can realize all the implementation modes in the method for reporting the terminal capability information applied to the terminal side, and can achieve the same technical effect, and the method is not repeated herein for avoiding repetition.

An embodiment of the present invention provides a base station 80 shown in fig. 8, including:

the transceiver is used for transmitting a pilot signal to a terminal;

Optionally, the transceiver is further configured to send, through a system message, radio resource control RRC signaling, or downlink control information DCI, configuration information for indicating an overlapping sending data flow capability of the base station.

Optionally, in a case that the overlap sending data flow capability of the base station is greater than a first parameter related to the receiving capability of the terminal, the oversampling factor is the minimum of the overlap sending data flow capability of the base station and the oversampling capability of the terminal;

and under the condition that the capability of the base station for overlapping the sending data streams is not greater than a first parameter related to the receiving capability of the terminal, the oversampling factor takes the value of 1.

Optionally, the updated rank parameter is a product of the oversampling factor and a rank parameter of the downlink channel matrix.

It should be noted that the base station in this embodiment is an apparatus corresponding to the method shown in fig. 5, and the implementation manners in the above embodiments are all applied to the embodiment of the apparatus, and the same technical effects can be achieved. It should be noted that the apparatus provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are not repeated herein.

Referring to fig. 9, an embodiment of the present invention provides a structural diagram of a base station 900, including: a processor 901, a transceiver 902, a memory 903, and a bus interface, wherein:

in this embodiment of the present invention, the base station 900 further includes: a program stored on a memory 903 and executable on a processor 901, which when executed by the processor 901 performs the steps of:

transmitting a pilot signal to a terminal;

It can be understood that, in the embodiment of the present invention, when the computer program is executed by the processor 901, each process of the embodiment of the method for reporting terminal capability information shown in fig. 5 can be implemented, and the same technical effect can be achieved.

In fig. 9, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 901 and various circuits of memory represented by memory 903 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 902 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

The processor 901 is responsible for managing a bus architecture and general processing, and the memory 903 may store data used by the processor 901 in performing operations.

It should be noted that the terminal in this embodiment is a terminal corresponding to the method shown in fig. 5, and the implementation manners in the above embodiments are all applicable to the embodiment of the terminal, and the same technical effects can be achieved. In the terminal, the transceiver 902 and the memory 903, and the transceiver 902 and the processor 901 may be communicatively connected through a bus interface, and the function of the processor 901 may also be implemented by the transceiver 902, and the function of the transceiver 902 may also be implemented by the processor 901. It should be noted that, the terminal provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

transmitting a pilot signal to a terminal;

When being executed by the processor, the program can realize all the implementation modes in the method for reporting the terminal capability information applied to the base station side, and can achieve the same technical effect, and the method is not repeated herein for avoiding repetition.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

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, 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 of the present invention.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes 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 steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, 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 claims.

Claims

1. A method for reporting terminal capability information is applied to a terminal, and is characterized by comprising the following steps:

determining an oversampling factor of the terminal according to an overlapping transmission data stream capability of a base station, an oversampling capability of the terminal, and a first parameter related to a receiving capability; the overlapping transmission data flow capacity of the base station is the total flow number of the overlapping transmission data flows of the base station, or the flow number of the overlapping transmission data flows distributed to the terminal by the base station; the oversampling capacity of the terminal is the maximum value of the oversampling multiple supported by the terminal; the first parameter related to the receiving capability of the terminal is the total number of receiving antennas of the terminal or the number of antennas used for receiving by the terminal;

updating the rank parameter of the downlink channel matrix according to the oversampling factor, and sending the updated rank parameter to the base station;

the step of determining the oversampling factor of the terminal according to the capability of the base station to overlap transmission data streams, the oversampling capability of the terminal, and the first parameter related to the receiving capability includes:

under the condition that the capability of the base station for overlapping and sending data streams is not greater than a first parameter related to the receiving capability of the terminal, the value of the oversampling factor is 1;

the step of updating the rank parameter of the downlink channel matrix according to the oversampling factor includes: and calculating the product of the oversampling factor and the rank parameter of the downlink channel matrix, and taking the product as the updated rank parameter.

2. The method of claim 1, wherein prior to determining the oversampling factor for the terminal, the method further comprises:

3. The method of claim 2, wherein the step of obtaining the overlapping transmit data stream capability of the base station comprises:

4. The method of claim 1, wherein prior to determining the oversampling factor for the terminal, the method further comprises:

5. A receiving method of terminal capability information is applied to a base station, and is characterized by comprising the following steps:

updating the rank parameter of the downlink channel matrix according to an oversampling factor, wherein the oversampling factor is determined according to the capability of the base station to transmit data streams in an overlapping manner, the oversampling capability of the terminal, and a first parameter related to the receiving capability; the updated rank parameter is the product of the oversampling factor and the rank parameter of the downlink channel matrix;

the overlapping sending data flow capacity of the base station is the total flow number of the overlapping sending data flows of the base station, or the flow number of the overlapping sending data flows distributed to the terminal by the base station;

the first parameter related to the receiving capability of the terminal is the total number of receiving antennas of the terminal or the number of antennas used for receiving by the terminal;

wherein, in case that the overlapped transmission data flow capability of the base station is greater than the first parameter related to the receiving capability of the terminal, the oversampling factor is the minimum of the overlapped transmission data flow capability of the base station and the oversampling capability of the terminal;

6. The method of claim 5, further comprising:

and sending configuration information for indicating the capability of the base station for overlapping and sending the data stream through a system message, radio Resource Control (RRC) signaling or Downlink Control Information (DCI).

7. The method of claim 5, wherein prior to receiving the rank parameter of the updated downlink channel matrix transmitted by the terminal, the method further comprises:

a pilot signal is transmitted to the terminal.

8. A terminal comprising a transceiver and a processor, wherein,

the processor is configured to determine an oversampling factor of the terminal according to an overlapping transmission data stream capability of a base station, an oversampling capability of the terminal, and a first parameter related to a reception capability; updating the rank parameter of the downlink channel matrix according to the oversampling factor; the overlapping sending data flow capacity of the base station is the total flow number of the overlapping sending data flows of the base station, or the flow number of the overlapping sending data flows distributed to the terminal by the base station; the oversampling capacity of the terminal is the maximum value of the oversampling multiple supported by the terminal; the first parameter related to the receiving capability of the terminal is the total number of receiving antennas of the terminal or the number of antennas used for receiving by the terminal;

the transceiver is used for sending the updated rank parameter to the base station;

the processor is further configured to: the oversampling factor is the minimum of the overlapping transmission data flow capability of the base station and the oversampling capability of the terminal, if the overlapping transmission data flow capability of the base station is greater than the first parameter of the terminal related to the receiving capability; under the condition that the capability of the base station for overlapping and sending data streams is not greater than a first parameter related to the receiving capability of the terminal, the value of the oversampling factor is 1;

the processor is further configured to: and calculating the product of the oversampling factor and the rank parameter of the downlink channel matrix, and taking the product as the updated rank parameter.

9. A terminal, comprising: processor, memory and program stored in the memory and executable on the processor, the program, when executed by the processor, implementing the steps of the method for reporting terminal capability information according to any one of claims 1 to 4.

10. A base station comprising a transceiver and a processor, wherein,

the overlapping transmission data flow capacity of the base station is the total flow number of the overlapping transmission data flows of the base station, or the flow number of the overlapping transmission data flows distributed to the terminal by the base station;

11. The base station of claim 10,

the transceiver is configured to transmit a pilot signal to a terminal.

12. A base station, comprising: processor, memory and a program stored on said memory and executable on said processor, said program when executed by said processor implementing the steps of the method of receiving terminal capability information according to any one of claims 5 to 7.

13. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.