WO2019213928A1

WO2019213928A1 - Transmission scheme indication method and device

Info

Publication number: WO2019213928A1
Application number: PCT/CN2018/086439
Authority: WO
Inventors: 张瑞齐
Original assignee: 华为技术有限公司
Priority date: 2018-05-11
Filing date: 2018-05-11
Publication date: 2019-11-14

Abstract

Disclosed are a transmission scheme indication method and device, the method comprising: generating a first signaling, the first signaling comprising first indication information and second indication information, the first indication information being used to indicate a transmission mode of a terminal, and the second indication information being used to indicate at least one transmission scheme of the terminal in the transmission mode; and transmitting the first signaling to the terminal. The present method may add transmission schemes corresponding to different transmission modes to the terminal, so that the terminal side may have two or more transmission schemes. When the transmission scheme needs to be switched, the terminal may be quickly switched to a transmission scheme corresponding to a DCI by merely issuing the DCI as an indication, thereby avoiding a process of re-transmitting the signaling for reconfiguration, reducing the switching time, and improving the switching efficiency of transmission schemes.

Description

Transmission scheme indication method and device

Technical field

The present application relates to the field of wireless communication technologies, and in particular, to a transmission scheme indication method and apparatus.

Background technique

The Long Term Evolution (LTE) system widely adopts Multiple Input and Multiple Output (MIMO) technology. When a base station has multiple transmit antenna ports and the terminal has multiple receive antenna ports, the base station can simultaneously Send multiple parallel data streams to the terminal.

Among them, for the transmission of different data streams, eight downlink transmission schemes are defined in the LTE protocol, namely: single antenna port transmission, transmission diversity, large delay cyclic delay diversity, closed loop spatial multiplexing, multi-user MIMO, single stream Beamforming, dual stream beamforming and up to eight stream transmission schemes. At the same time, the LTE protocol defines ten transmission modes, and different transmission modes correspond to different transmission scenarios, and the required transmission schemes are also different. Therefore, the terminal needs to switch the transmission mode according to different requirements.

The existing protocol specifies a transmission mode (such as downlink transmission mode 3/4/5/6/7/8/9/10) including two transmission schemes, wherein the transmission scheme used by the base station to transmit the downlink data channel can Indicated by the DCI carried by the downlink control channel. Since the transmission scheme associated with the downlink transmission mode is fixed, if the base station intends to adopt a transmission scheme other than the transmission scheme associated with the transmission mode, the high-level signaling reconfiguration transmission mode needs to be adopted, and the transmission mode switching takes time. Longer and less efficient, it cannot meet the needs of fast switching transmission schemes.

Summary of the invention

The present application provides a transmission scheme indication method and apparatus to improve the handover efficiency of a transmission scheme, which is less time consuming.

In a first aspect, the present application provides a transmission scheme indication method, where the method includes: an access network device generates first signaling, where the first signaling includes first indication information and second indication information, where the first The indication information is used to indicate a transmission mode of the terminal, the second indication information is used to indicate at least one transmission scheme of the terminal in the transmission mode, and the access network device sends the first to the terminal Signaling.

The transmission scheme includes: a single antenna port transmission scheme, a transmit diversity transmission scheme, a large delay cyclic delay diversity transmission scheme, a closed loop spatial multiplexing transmission scheme, a multi-user MIMO transmission scheme, a single-stream beamforming transmission scheme, and a dual stream A beamforming transmission scheme or one or more of up to eight stream transmission schemes.

The method provided by the present aspect, the first indication information and the second indication information are used to indicate the transmission mode of the terminal, and the at least one transmission scheme corresponding to the transmission mode, when the transmission scheme switching needs to be performed, only the DCI is delivered. The indication can enable the terminal to quickly switch to the transmission scheme corresponding to the DCI, thereby avoiding the process of re-transmitting the RRC signaling reconfiguration, reducing the switching time, and improving the switching efficiency of the transmission scheme.

With reference to the first aspect, in an implementation manner of the first aspect, the first indication information is further used to indicate a transmission scheme associated with the transmission mode, and the transmission scheme and the association associated with the transmission mode At least one of all transmission schemes indicated by the second indication information is different.

In conjunction with the first aspect, in another implementation manner of the first aspect, the first indication information is further used to indicate two or more transmission schemes associated with the transmission mode, for example, the first indication information The transmission scheme for indicating association includes a first transmission scheme and a second transmission scheme, and the first transmission scheme and the second transmission scheme are different from at least one of all transmission schemes indicated by the second indication information.

The second indication information is further used to indicate that the at least one transmission scheme replaces one of the first transmission scheme and the second transmission scheme.

Further, in the transmission scheme associated with the transmission mode indicated by the first indication information, there is a transmission scheme, for example, the first transmission scheme is referred to as a transmission scheme in a fallback mode, and the second indication information is further And means for indicating a transmission scheme to replace the transmission scheme in the backoff mode in the first indication information, that is, replacing the first transmission scheme.

With reference to the first aspect, in still another implementation manner of the first aspect, the method further includes: generating, by using the at least two transmission schemes, the second signaling, where the second signaling is used Deducing, in the at least two transmission schemes, a transmission scheme for demodulation of a downlink data channel; transmitting the second signaling to a terminal.

In conjunction with the first aspect, in a further implementation of the first aspect, the second indication information includes an identifier, the identifier is used to indicate a downlink control information DCI format, and the DCI format is associated with at least one transmission scheme. .

In conjunction with the first aspect, in a further implementation of the first aspect, the first signaling is carried by a radio resource control RRC; and the second signaling is carried by a physical downlink control channel PDCCH.

With reference to the first aspect, in a further implementation of the first aspect, the first indication information is used to indicate a transmission mode of the terminal, and the second indication information is used to indicate that the terminal is in the transmission mode. At least one transmission scheme, including the following:

The first indication information is used to indicate that the transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme comprising: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

The second indication information is used to indicate that the transmission mode 9 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the large delay cycle delay. The diversity transmission scheme and the transmit diversity transmission scheme replace the transmit diversity transmission scheme associated with the first indication information, and the transmission scheme in the transmission mode 9 indicated by the second indication information is: a large delay cyclic delay diversity transmission scheme, and a transmit diversity transmission scheme. Solutions and up to eight-stream transmission schemes;

or,

The second indication information is used to indicate that the transmission mode 9 further includes: a closed-loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the closed-loop spatial multiplexing transmission scheme and The transmit diversity transmission scheme replaces the transmit diversity transmission associated with the first indication information, and the second indication information indicates that the transmission scheme in the transmission mode 9 is: a closed loop spatial multiplexing transmission scheme, a transmit diversity transmission scheme, and up to eight streams Transmission scheme

or,

The first indication information is used to indicate that the transmission mode of the terminal is the transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

The second indication information is used to indicate that the transmission mode 10 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the large delay cycle delay. The diversity transmission scheme and the transmit diversity transmission scheme replace the transmit diversity transmission scheme associated with the first indication information, and the transmission scheme in the transmission mode 10 indicated by the second indication information is: a large delay cyclic delay diversity transmission scheme, and a transmission Diversity transmission scheme and up to eight-stream transmission scheme;

or,

The second indication information is used to indicate that the transmission mode 10 further includes: a closed loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the closed loop spatial multiplexing transmission scheme and The transmit diversity transmission scheme replaces the transmit diversity transmission scheme associated with the first indication information, and the transmission scheme in the transmission mode 10 indicated by the second indication information is: a closed loop spatial multiplexing transmission scheme, a transmit diversity transmission scheme, and multiple Eight-stream transmission scheme.

With reference to the first aspect, in a further implementation of the first aspect, the method further includes: receiving channel state information CSI sent by the terminal, where the state information includes a first CSI and a second CSI, the first CSI Channel state information calculated based on a first transmission scheme in the transmission mode, and the second CSI is channel state information calculated based on a second transmission scheme in the transmission mode; The first transmission scheme and the second transmission scheme belong to a transmission scheme associated with the transmission mode.

With reference to the first aspect, in a further implementation manner of the first aspect, the base station sends the channel state information to the terminal user, where the configuration information includes the first configuration information and the second configuration information, where The first configuration information is associated with the first transmission scheme, and the second configuration information is associated with the second transmission scheme. The channel state information reporting configuration information is used to indicate parameters required for the terminal to measure and report channel state information.

With reference to the first aspect, in still another implementation manner of the first aspect, the first configuration information and the second configuration information include a transmission scheme assumed for channel state information calculation; further, the first The configuration information and the second configuration information include reference signals for which channel state information calculation is based, the reference symbols including CRS and CSI-RS.

In the method, the terminal introduces a measurement based on the CSI-RS or the CRS-based indication in the CSI reporting configuration parameter, thereby helping the access network device to quickly determine which DCI format to use and generate the corresponding second letter. Therefore, to meet the link change requirements, the switching efficiency of the transmission scheme is improved.

In a second aspect, the present application further provides a transmission scheme indication method, where the method includes: acquiring, by the terminal, first signaling, where the first signaling includes first indication information and second indication information, the first indication The information is used to indicate a transmission mode of the terminal, the second indication information is used to indicate at least one transmission scheme of the terminal in the transmission mode, and the terminal determines the transmission mode according to the first indication information, And determining, according to the second indication information, at least one transmission scheme in the transmission mode.

With reference to the second aspect, in an implementation manner of the second aspect, the first indication information is further used to indicate a transmission scheme associated with the transmission mode, and the transmission scheme and the association associated with the transmission mode At least one of all transmission schemes indicated by the second indication information is different.

With reference to the second aspect, in another implementation manner of the second aspect, the first indication information is further used to indicate two or more transmission schemes associated with the transmission mode, for example, the first indication information The transmission scheme for indicating association includes a first transmission scheme and a second transmission scheme, and the first transmission scheme and the second transmission scheme are different from at least one of all transmission schemes indicated by the second indication information.

With reference to the second aspect, in still another implementation of the second aspect, in a case that the transmission mode includes at least two transmission schemes, the method further includes: acquiring second signaling; according to the second signaling One transmission scheme is determined in the at least two transmission schemes and used for demodulation of the downlink data channel.

With reference to the second aspect, in still another implementation manner of the second aspect, determining, according to the second signaling, one transmission scheme in the at least two transmission schemes, and using the downlink transmission channel for demodulation And including: parsing the second signaling to obtain a DCI format, where the DCI format is associated with at least one transmission scheme; and according to the DCI format and the association relationship between the DCI format and at least one transmission scheme in the transmission mode Determining a target transmission scheme; performing demodulation of the downlink data channel according to the target transmission scheme.

In this implementation manner, the access network device, for example, the base station and the terminal, agree on a transmission scheme included in the transmission mode, and the base station may indicate different transmission schemes by sending different DCI formats, so that the transmission scheme is implemented. The switch is faster and more flexible.

The first signaling is carried by the radio resource control RRC, and the second signaling is carried by the physical downlink control channel PDCCH.

With reference to the second aspect, in still another implementation manner of the second aspect, determining the transmission mode according to the first indication information, and determining, according to the second indication information, at least one transmission scheme in the transmission mode , including the following:

Determining, according to the first indication information, a transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme comprising: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

Determining, according to the second indication information, that the transmission mode 9 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the large delay cyclic delay diversity. The transmission scheme and the transmit diversity transmission scheme replace the transmit diversity transmission scheme associated with the first indication information, and the obtained transmission schemes in the transmission mode 9 are: a large delay cyclic delay diversity transmission scheme, a transmit diversity transmission scheme, and multiple To eight-stream transmission scheme;

or,

Determining, according to the second indication information, that the transmission mode 9 further includes: a closed loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the closed loop spatial multiplexing transmission scheme and the transmission. The diversity transmission scheme replaces the transmit diversity transmission scheme associated with the first indication information, and the obtained transmission scheme indicating the transmission mode 9 is: a closed loop spatial multiplexing transmission scheme, a transmit diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

Determining, according to the first indication information, a transmission mode of the terminal, a transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

Determining, according to the second indication information, that the transmission mode 10 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the large delay cyclic delay diversity. The transmission scheme and the transmit diversity transmission scheme replace the transmit diversity transmission scheme associated with the first indication information, and the obtained transmission schemes in the transmission mode 10 are: a large delay cyclic delay diversity transmission scheme, a transmit diversity transmission scheme, and multiple To eight-stream transmission scheme;

or,

Determining, according to the second indication information, that the transmission mode 10 further includes: a closed-loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the closed-loop spatial multiplexing transmission scheme and transmission The diversity transmission scheme replaces the transmit diversity transmission scheme associated with the first indication information, and the obtained transmission schemes in the transmission mode 10 are: a closed loop spatial multiplexing transmission scheme, a transmit diversity transmission scheme, and a multi-to-eight-stream transmission scheme.

With reference to the second aspect, in a still further implementation of the second aspect, the method further includes: acquiring a reference signal; measuring channel quality according to the reference signal, generating at least one channel state information CSI, where At least one CSI is used to determine second signaling, each of the CSIs corresponding to one transmission scheme; and the at least one CSI is transmitted. In this implementation manner, the base station may configure the measurement signaling instruction given by the CSI, so that the terminal matches the CSI measurement result and the transmission mode to be adopted by the base station, thereby improving the link adaptation performance.

In a third aspect, the present application provides a transmission scheme indicating apparatus, the apparatus comprising means for performing the steps in the first aspect and the implementations of the first aspect.

In a fourth aspect, the present application provides a transmission scheme indicating apparatus, the apparatus comprising means for performing the steps in the implementations of the second aspect and the second aspect.

In a fifth aspect, the present application further provides an access network device, such as a base station, including: a transceiver, a processor, and a memory, wherein the processor is configured to couple with a memory and read instructions in the memory, and further The processor is configured to perform the following functions:

The processor is configured to generate first signaling, where the first signaling includes first indication information and second indication information, where the first indication information is used to indicate a transmission mode of the terminal, and the second indication information is At least one transmission scheme for indicating the terminal in the transmission mode; the transceiver, configured to send the first signaling to the terminal.

Optionally, the first indication information is further used to indicate a transmission scheme associated with the transmission mode, and the transmission scheme associated with the transmission mode and all transmission schemes indicated by the second indication information At least one different.

Optionally, the first indication information is further used to indicate two or more transmission schemes associated with the transmission mode, for example, the first indication information is used to indicate that the associated transmission scheme includes a first transmission scheme and a second transmission scheme, wherein the first transmission scheme and the second transmission scheme are different from at least one of all transmission schemes indicated by the second indication information, wherein the second indication information is further used to indicate the at least A transmission scheme replaces one of the first transmission scheme and the second transmission scheme.

With reference to the fifth aspect, in an implementation manner of the fifth aspect, the processor is further configured to: when the transmission mode includes at least two transmission schemes, generate second signaling, where the second signaling Demodulating for indicating that one transmission scheme is used as a downlink data channel in the at least two transmission schemes; the transceiver is further configured to send the second signaling.

Optionally, the second indication information includes an identifier, where the identifier is used to indicate a DCI format, and the DCI format is associated with at least one transmission scheme.

Optionally, the first signaling is carried by the RRC; and the second signaling is carried by the PDCCH.

In conjunction with the fifth aspect, in another implementation manner of the fifth aspect, the memory is used to store a program or an instruction, and the processor may execute a program or an instruction stored in the memory, thereby implementing various aspects of the foregoing first aspect. The transmission scheme indication method described in the implementation manner.

In a sixth aspect, the present application further provides a computer storage medium, which can store a program, and when executed, can implement some or all of the steps in the embodiments including the transmission scheme indication method provided by the application.

In a seventh aspect, the present application also provides a computer program product, when the computer program product is run on a computer, causing the computer to perform any of the foregoing first aspect and various implementations of the first aspect The method described.

In an eighth aspect, the present application further provides a terminal, such as a user equipment UE, including: a transceiver, a processor, and a memory, wherein the processor is configured to couple with a memory and read an instruction in the memory, and further, The terminal is configured to perform the following functions:

The transceiver is configured to acquire first signaling, where the first signaling includes first indication information and second indication information, where the first indication information is used to indicate a transmission mode of the terminal, and the second indication information is used to Determining at least one transmission scheme of the terminal in the transmission mode; the processor is configured to determine the transmission mode according to the first indication information, and determine, according to the second indication information, the transmission mode At least one transmission scheme.

With reference to the eighth aspect, in an implementation manner of the eighth aspect, the transceiver is further configured to acquire a second signaling if the transmission mode includes at least two transmission schemes; And determining, in the at least two transmission schemes, one transmission scheme according to the second signaling, and using the demodulation for the downlink data channel.

With reference to the eighth aspect, in another implementation manner of the eighth aspect, the processor is configured to parse the second signaling to obtain a DCI format, where the DCI format is associated with at least one transmission scheme; Determining a target transmission scheme by determining a DCI format and an association relationship between the DCI format and at least one transmission scheme in the transmission mode; and demodulating the downlink data channel according to the target transmission scheme.

In conjunction with the eighth aspect, in a still further implementation of the eighth aspect, the transceiver is further configured to acquire a reference signal, and the processor is further configured to measure channel quality according to the reference signal to generate at least a channel state information CSI, wherein the at least one CSI is used to determine a second signaling, and each of the CSIs corresponds to a transmission scheme; the transceiver is further configured to send the at least one CSI to enable a base station A transmission scheme is determined based on the at least one CSI.

In a ninth aspect, the present application further provides a computer storage medium, comprising: instructions in the computer storage medium, when the instructions are run on a computer, causing the computer to perform the various implementations described above in the second aspect The transmission scheme indicates the method.

Additionally, a computer program product is provided which, when run on a computer, causes the computer to perform the aforementioned second aspect and various implementations of the second aspect when the computer program product is run on a computer The method of any of the preceding claims.

In a tenth aspect, the present application further provides a system, where the system includes an access network device and at least one terminal, where the access network device is the foregoing fifth aspect and the fifth aspect, The device is the device according to the foregoing eighth aspect and the eighth aspect, wherein the system is used to implement the transmission scheme indication method described in the foregoing implementation manners of the first aspect and the second aspect .

The transmission scheme indication method and apparatus provided by the present application add a transmission scheme corresponding to different transmission modes to the terminal through RRC signaling, so that the terminal side can have two or more transmission schemes, and when the transmission scheme needs to be switched, Only by issuing the DCI to indicate that the terminal can quickly switch to the transmission scheme corresponding to the DCI, thereby preventing the base station from re-transmitting the RRC signaling reconfiguration process, reducing the handover time, and improving the switching efficiency of the transmission scheme.

DRAWINGS

FIG. 1 is a schematic diagram of a scenario indicated by a transmission scheme according to an embodiment of the present disclosure;

FIG. 2 is a schematic flowchart of a method for indicating a transmission scheme according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a transmission mode, a DCI format, and a mapping relationship of a transmission scheme according to an embodiment of the present disclosure;

FIG. 4 is a schematic flowchart diagram of another method for indicating a transmission scheme according to an embodiment of the present disclosure;

FIG. 5 is a signaling flowchart of a method for indicating a transmission scheme according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a transmission scheme indication apparatus according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present application.

detailed description

The above-mentioned objects, features, and advantages of the embodiments of the present application can be more clearly understood and understood by those skilled in the art. The program is explained in further detail.

First, the application scenarios involved in the present application and various physical devices in the application scenario, and related technical terms are introduced and described.

Various embodiments of the present application are applied to a communication system composed of at least one access network device and at least one terminal. As shown in FIG. 1, the access network device and the terminal both have a wireless transceiver function, wherein the access network device includes but is not limited to: a base station (NodeB), an evolved base station (eNodeB), and a fifth generation (the Fifth generation, 5G) a base station in a communication system, a base station or network device in a future communication system, an access node in a WiFi system, a wireless relay node, and a wireless backhaul node, etc., and the access network device may further include chip.

The terminal may include: a user equipment (UE), a mobile station (MS), a mobile terminal (MT), a remote terminal (RT), and an access terminal ( Access terminal, AT), user agent (UA), etc. The terminal may communicate with one or more core networks via a radio access network (RAN), or may access the distributed network in an ad hoc or unlicensed manner, and the terminal may also be in other manners. The access to the wireless network for communication is not limited in this embodiment of the present invention.

The transmission scheme indication method provided in the embodiments of the present application can be applied to various communication systems, such as a MIMO wireless communication system, an LTE system, a WCDMA, a 4G, a 4.5G, and a 5G system, and the application scenario is not limited.

Each of the application provides a transmission scheme indication method, which is used to implement fast handover between different transmission schemes on the terminal side to meet different requirements of different transmission modes, and improve the adaptive performance of the link.

The following describes the transmission scheme and transmission mode and the corresponding Downlink Control Information (DCI) format in different transmission modes.

Taking the LTE system as an example, the LTE protocol defines eight downlink transmission schemes, which are:

Single-antenna port scheme, Transmit diversity scheme, Large delay CDD scheme, Closed-loop spatial multiplexing Scheme), multi-user MIMO scheme, single-layer beamforming scheme, dual-layer beamforming scheme, up to eight-stream transmission scheme (Up to 8 layer transmission scheme). For definitions of these eight downlink transmission schemes, please refer to the LTE protocols 3GPP TS 36.211, 3GPP TS 36.212 and 3GPP TS 36.213.

Among them, Single-antenna port with port 5 (also known as single-antenna port transmission based on antenna port 5), dual-layer beamforming transmission scheme (Dual layer transmission with port 7 and 8, also known as For dual layer transmission based on antenna ports 7 and 8, the up to eight stream transmission scheme is also referred to as at most eight stream beamforming transmission scheme, Cyclic Delay Diversity (CDD).

At the same time, the LTE protocol defines ten transmission modes (TM), see Figure 3.

Transmission Mode 1 (TM1): The transmission scheme included is a single antenna port transmission scheme, and the base station indicates the transmission parameters of the PDSCH to the UE through DCI format 1A and DCI format 1.

Transmission Mode 2 (TM2): The transmission scheme included is a transmit diversity transmission scheme, and the base station indicates the transmission parameters of the PDSCH to the UE through DCI format 1A and DCI format 1.

Transmission Mode 3 (TM3): The transmission scheme included is a transmit diversity and a large delay CDD transmission scheme, and the base station indicates to the UE by using the DCI format 1A and the DCI format 2A to adopt a transmit diversity or a large delay CDD transmission scheme, respectively.

Transmission Mode 4 (TM4): The transmission scheme included is transmit diversity and closed-loop spatial multiplexing. The base station indicates to the UE by using DCI format 1A and DCI format 2 that a transmit diversity or a closed-loop spatial multiplexing transmission scheme is adopted.

Transmission Mode 5 (TM5): The transmission scheme included is transmit diversity and multi-user MIMO, and the base station indicates to the UE by adopting a transmit diversity or a multi-user MIMO transmission scheme through DCI format 1A and DCI format 1D, respectively.

Transmission Mode 6 (TM6): The transmission scheme included is transmit diversity and single-layer closed-loop spatial multiplexing. The base station indicates to the UE through the DCI format 1A and the DCI format 1B that the transmission diversity or the single-layer closed-loop spatial multiplexing transmission scheme is adopted.

Transmission Mode 7 (TM7): The transmission scheme included is transmit diversity or single antenna port transmission (using a transmit diversity transmission scheme when the CRS port of the base station is greater than 1, a single antenna transmission scheme when the CRS port is 1), and a single stream. Beamforming, the base station instructs the UE to adopt a transmit diversity, a single antenna port or a single stream beamforming transmission scheme by DCI format 1A and DCI format 1, respectively, wherein the single stream beamforming transmission scheme is also referred to as an antenna port based 5 single antenna port transmission.

Transmission Mode 8 (TM8): The transmission scheme included is transmit diversity or single antenna port transmission (using a transmit diversity transmission scheme when the CRS port of the base station is greater than 1, a single antenna transmission scheme when the CRS port is 1), and a dual stream beam. Forming, the base station indicates to the UE by using the DCI format 1A and the DCI format 2B to adopt a transmit diversity, a single antenna port or a dual stream beamforming transmission scheme, wherein the dual stream beamforming transmission scheme is also referred to as antenna ports 7 and 8 Double layer transmission.

Transmission Mode 9 (TM9): The transmission scheme included is transmit diversity or single antenna port transmission (using the transmit diversity transmission scheme when the CRS port of the base station is greater than 1, and the single antenna transmission scheme when the CRS port is 1) and up to The eight-stream beam is shaped, and the base station indicates to the UE by using the DCI format 1A and the DCI format 2C to adopt a transmit diversity, a single antenna port, or a multi-to eight-port transmission scheme.

Transmission Mode 10 (TM10): The transmission scheme included is transmit diversity or single antenna port transmission (using the transmit diversity transmission scheme when the CRS port of the base station is greater than 1, and the single antenna transmission scheme when the CRS port is 1) and up to The eight-stream beam is shaped, and the base station indicates to the UE by using the DCI format 1A and the DCI format 2D to adopt a transmit diversity, a single antenna port, or a multi-to-eight-channel transmission scheme.

It can be seen that the LTE protocol specifies two DCI formats for each TM, one of which is DCI format 1A. For transmission mode 3/4/5/6/7/8/9/10, if the CRS configured by the base station has two antenna ports, the transmission scheme corresponding to DCI format 1A is a transmit diversity transmission scheme, therefore, in some cases The process of converting the transmission scheme of the UE from the transmission scheme corresponding to another DCI format to the transmission diversity transmission scheme of DCI format 1A is called a fallback mode.

Since the fallback mode only supports the transmit diversity transmission scheme in which the DCI format is 1A, when the UE needs to switch to a different transmission scheme, for example, when the UE is in the transmission mode 9, the base station wants to adopt a transmission scheme such as a large delay CDD or a closed loop spatial multiplexing. The base station needs to retransmit the Radio Resource Control (RRC) signaling to the UE, and switch its transmission mode from the transmission mode 9 to the transmission mode 3 or the transmission mode 4. After receiving the RRC signaling, the UE parses and determines the transmission mode that it wants to switch, and finally determines the transmission scheme of the handover by detecting the DCI sent by the base station.

In existing standards, the switching of transmission modes relies on RRC signaling reconfiguration. For example, when the UE is in the TM3, the base station may send a Physical Downlink Share Channel (PDSCH) to the UE by using a transmission diversity supported by the TM3 or a transmission scheme of the large delay CDD. If the base station finds that the performance of the beamforming (BF) transmission scheme of the up to eight streams is better for the UE, the base station can only indicate the terminal to switch the transmission mode by sending RRC signaling, for example, switching to up to eight. Streaming TM9.

Compared with the transmission scheme of large-delay CDD, the up to eight-stream transmission scheme in TM9 has beamforming gain and is suitable for multi-user parallel transmission, that is, the base station can simultaneously transmit parallel data streams to multiple users, wherein The weighting coefficients of each user's data stream are different, so that the user receiving end can be free from interference from other data streams in the parallel data stream, and correctly demodulate the data that is sent to the user; the transmission of up to eight streams in TM9 The disadvantage of the scheme is that since the demodulation of the data depends on the DeModulation Reference Signal (DMRS), it is necessary to insert the DMRS in the transmission symbol of the data. The effect of the insertion of DMRS is to reduce the number of resources for transmitting data and affect the peak rate of data.

The mode of switching the RRC reconfiguration transmission mode has a delay of several tens of milliseconds. Since the multi-user MIMO transmission scheme is adopted, and those users do multi-user MIMO, which is dependent on the scheduling of the base station, it is likely to change with the change of the subframe, so the switching speed of the TM cannot be kept up with the RRC reconfiguration method. Changes in demand. For example, when the base station finds that the current UE can be paired with other users for MU-MIMO, the RRC reconfiguration is initiated to instruct the UE to switch the transmission mode to TM9. However, when the UE switches to TM9, after a tens of millisecond delay, the base station finds that the data of the user paired with the UE has been transmitted, or the channel condition of the UE has changed, and is no longer suitable for pairing. With single-user MIMO transmission, the handover of the UE transmission mode fails to achieve the desired target.

In order to improve the handover efficiency and meet the fast handover of the transmission scheme of the UE in different transmission modes, the embodiment of the present application increases the transmission scheme in different transmission modes to the same transmission mode by using the RRC signaling configuration of the base station, thereby avoiding the original one. The transmission mode only supports a limited transmission scheme, which results in a long time to reconfigure through RRC signaling when the transmission scheme is switched.

Specifically, the embodiment provides a transmission scheme indication method, as shown in FIG. 2, the method includes:

Step 201: The access network device generates a first signaling, where the first signaling includes first indication information and second indication information, where the first indication information is used to indicate a transmission mode of the terminal, and the second indication information is used. At least one transmission scheme for indicating the terminal in the transmission mode.

The first indication information may only indicate a transmission mode of the terminal, such as TM9, TM10, and the like. In addition, the first indication information may further indicate a transmission mode of the terminal, and at least one transmission scheme associated with the transmission mode.

Specifically, it includes the following aspects:

In one aspect, the first indication information indicates a transmission mode associated with the transmission mode, such as a multi-to-eight-beam beamforming transmission scheme corresponding to TM9 and TM9, wherein the up to eight-stream beamforming The transmission scheme is different from the transmission scheme indicated by the second indication information. For example, the second indication information indicates that the transmission scheme under TM9 is a large delay CDD and a transmit diversity transmission scheme. With this configuration, the transmission scheme in each transmission mode can be freely configured with a high degree of flexibility.

On the other hand, the first indication information indicates one transmission mode and two or more transmission schemes associated with the transmission mode, for example, the first indication information indicates that the transmission scheme corresponding to TM9 and TM9 includes: a single antenna port transmission scheme and Up to eight-stream beamforming transmission scheme, or a transmit diversity transmission scheme and a multi-to-eight-beam beamforming transmission scheme, and the second indication information indicates that the transmission scheme under TM9 may further include: large delay CDD and transmit diversity transmission Program.

Optionally, the second indication information is further used to indicate that the large delay CDD and the transmit diversity transmission scheme are replaced by the transmit diversity transmission scheme in the first indication information, and the TM9 indicated by the second indication information is obtained. Corresponding transmission schemes include: large delay CDD transmission scheme, transmit diversity transmission scheme and up to eight-stream beamforming transmission scheme.

The first indication information indicates that the up to eight-stream beamforming transmission scheme is different from the transmission scheme indicated by the second indication information, or at least one of the transmission schemes indicated in the second indication information All transmission schemes indicated by the first indication information are different. If the base station does not configure the second indication information, the base station sends the downlink data to the UE according to the transmission mode indicated by the first indication information and one of the transmission schemes in the transmission mode, where the format of the DCI is used to indicate the downlink data transmission. Transmission scheme.

If the base station configures the second indication information for the UE, the second indication information is used to determine another transmission scheme in the transmission mode, and is used to indicate the DCI format that the UE needs to detect. In this way, the base station and the UE reach a consensus on the transmission scheme included in the transmission mode, and the base station can indicate different transmission schemes by transmitting different DCI formats, so that the handover of the transmission scheme is more rapid and flexible.

The second indication information includes an identifier, where the identifier is used to indicate a downlink control information DCI format, and the DCI format is associated with at least one transmission scheme. Referring to FIG. 3, a transmission scheme corresponding to each DCI format, and a DCI format included in each transmission mode are shown.

For example, the transmission mode TM3 includes two DCI formats, namely DCI format 1A and DCI format 2A, wherein the transmission scheme corresponding to DCI format 1A is transmit diversity; and the transmission scheme corresponding to DCI format 2A is large delay CDD and transmit diversity.

The DCI format indicated by the identifier includes any one or more than DCI format 1A, for example: DCI format 1, DCI format 1B, DCI format 1D, DCI format 2, DCI format 2A, DCI format 2B, DCI format 2C and DCI format 2D.

Optionally, the first signaling is carried by the RRC, or the first signaling is RRC signaling.

Step 202: The access network device sends the first signaling to a terminal.

After receiving the first signaling from the access network device, the terminal can obtain all transmission schemes that the current terminal can support in the transmission mode indicated by the first indication information.

It should be noted that the first signaling may be one signaling, such as RRC signaling, or may be two sub-signals, such as a first sub-signal and a second sub-signal, and the first sub-letter The first indication information is carried in the command, and the second indication information is carried in the second sub-signal, which is not limited in this embodiment.

In addition, after the foregoing method step 202, the method further includes:

The access network device generates second signaling, where the second signaling is used to indicate that one transmission scheme is used as demodulation of a downlink data channel in the at least two transmission schemes; the access network device sends the terminal to the terminal The second signaling.

The second signaling is carried by a Physical Downlink Control Channel (PDCCH).

In the method provided by the embodiment, the access network device adds a transmission scheme corresponding to different transmission modes to the terminal by using the first signaling, for example, RRC signaling, so that the terminal side can have two or more transmission schemes when needed. When the transmission scheme is switched, the terminal can be quickly switched to the transmission scheme corresponding to the DCI by sending the second signaling, for example, the DCI, so as to avoid the process of re-transmitting the RRC signaling reconfiguration by the base station, which is reduced. Switching time improves the switching efficiency of the transmission scheme.

Further, the process for generating the second signaling by the access network device includes: an access network device, for example, the base station acquires channel state information (CSI) from the terminal, where the channel state information includes a CSI and a second CSI, the first CSI is channel state information calculated by the terminal according to a first transmission scheme in a transmission mode, and the second CSI is a second in the transmission mode of the terminal. The transmission scheme is channel state information calculated under assumption conditions; and the first transmission scheme and the second transmission scheme belong to a transmission scheme associated with the transmission mode.

Determining, by the base station, one of the CSIs according to the channel quality condition indicated by the first CSI and the second CSI, and filling the determined DCI format or identifier corresponding to the CSI into the signaling, to generate the second letter. make.

Specifically, the base station sends the CSI report configuration information to the terminal, where the CSI report configuration information includes the first configuration information and the second configuration information, where the first configuration information and the second configuration information are included in the channel state information calculation Hypothetical transmission scheme.

The first configuration information is associated with the first transmission scheme, and the second configuration information is associated with the second transmission scheme. The CSI reporting configuration information is used to indicate parameters required for the terminal to measure and report channel state information.

Optionally, the first configuration information and the second configuration information include reference signals used for channel state information calculation, where the reference symbols include a channel reference signal (CRS) and a channel state information reference signal ( Channel State Information-Reference Signal, CSI-RS).

Optionally, the CSI reporting configuration information is carried by the RRC.

It should be noted that, in the LTE standard, when the transmission mode of the base station configuration terminal is the transmission mode 9, the CSI reporting configuration information of the terminal is configured to include: a Rank Index (RI) and/or a precoding matrix index. (Precoding Matrix Index, PMI), the acquisition of CSI requires the terminal to measure according to CSI-RS. When calculating CQI and RI, it is assumed that the transmission scheme of PDSCH is up to eight streams of beamforming. When the configured CSI reports only the CQI (Channel Quality Index), the CSI is obtained by the terminal to measure based on the CRS, and the CSCH is calculated to assume that the transmission scheme of the PDSCH is transmission diversity.

In this embodiment, due to the change of the CSI configuration mode, the configuration parameter that the terminal reports in the CSI needs to include a configuration parameter to indicate that the CSI is obtained based on CRS or based on CSI-RS measurement. For example, when the base station configures the ME9 for the UE, and the transmission scheme of the fallback mode is the large-delay CDD, the base station needs to configure the CSI measurement for the UE and report the channel state information based on the CRS measurement, and then the UE hypothesis corresponding to the CSI. The transmission scheme of its PDSCH is a large delay CDD.

In the method, the terminal introduces a measurement based on the CSI-RS or the CRS-based indication in the CSI reporting configuration parameter, thereby helping the base station to quickly determine which DCI format to use and generate the corresponding second signaling, thereby Meet the link change requirements and improve the switching efficiency of the transmission scheme.

The embodiment further provides another transmission scheme indication method, which is applied to the terminal, and is used to switch the transmission scheme according to the unnecessary requirement. As shown in FIG. 4, the method includes:

Step 401: The terminal acquires first signaling from the base station, where the first signaling includes first indication information and second indication information, where the first indication information is used to indicate a transmission mode of the terminal, and the second indication information is used. At least one transmission scheme for indicating the terminal in the transmission mode.

Step 402: The terminal determines the transmission mode according to the first indication information, and determines at least one transmission scheme in the transmission mode according to the second indication information.

The first indication information is further used to indicate a transmission scheme associated with the transmission mode, and at least one of the transmission scheme associated with the transmission mode and all transmission schemes indicated by the second indication information Different; or the first indication information is further used to indicate two or more transmission schemes associated with the transmission mode, and the two or more transmission schemes and the second indication information indicate At least one of all transmission schemes is different.

Further, in the transmission scheme associated with the transmission mode indicated by the first indication information, there is a transmission scheme, such as a first transmission scheme, which may be referred to as a transmission scheme in a fallback mode. The second indication information is further used to indicate a transmission scheme to replace the transmission scheme in the backoff mode in the first indication information, that is, to replace the first transmission scheme.

Step 403: The terminal acquires the second signaling from the base station, where the second signaling is used to indicate that the terminal determines a transmission scheme of the PDSCH, where the transmission scheme of the PDSCH may be the indication indicated in the second indication information. One of at least two transmission schemes.

Step 404: The terminal determines one transmission scheme in the at least two transmission schemes according to the second signaling, and uses it for demodulation of the downlink data channel.

Specifically, the method includes: parsing the second signaling to obtain a DCI format, where the DCI format is associated with at least one transmission scheme; and according to the DCI format and the association relationship between the DCI format and at least one transmission scheme in the transmission mode Determining a target transmission scheme; performing demodulation of the downlink data channel or performing downlink data transmission according to the target transmission scheme.

In transmission mode 3, the large-delay CDD transmission scheme uses cell-level CRS for channel estimation and demodulation, and can support up to four layers of PDSCH transmission. In transmission mode 4, the closed-loop spatial multiplexing transmission scheme also uses CRS. Channel estimation and demodulation are performed to support up to 4 layers of PDSCH transmission.

In transmission mode 9 or 10, up to eight streams of beamforming require UE-specific DMRS for channel estimation and demodulation. Therefore, compared to TM3 and TM4, TM9 and TM10 can perform UE-specific beamforming on PDSCH and DMRS with larger beamforming gain; however, due to the transmission of DMRS, the resources for transmitting PDSCH are reduced. In order to achieve the best performance of TM3, TM4, TM9, TM10, dynamic switching between large delay CDD, closed-loop spatial multiplexing and up to eight-stream beamforming is required.

Further, the embodiment of the present application provides the following four transmission scheme indication manners:

method one:

The transmission scheme corresponding to the DCI format 1A under the TM9 is replaced by the large-delay CDD transmission scheme corresponding to the DCI format 2A of the TM3. Specifically, the indication manner includes:

The first indication information acquired by the terminal is used to indicate that the transmission mode of the terminal is TM9, and a transmission scheme associated with the TM9, where the transmission scheme includes: a single antenna port transmission scheme and a multi-to eight-channel transmission scheme, or transmit diversity. Transmission scheme and up to eight-stream transmission scheme. Wherein, when there is one antenna port corresponding to the single antenna port transmission scheme, there are two or more antennas corresponding to the transmission diversity transmission scheme.

In the following embodiments, the transmit diversity transmission scheme corresponding to two or more antennas is taken as an example for description.

The second indication information acquired by the terminal is used to indicate that the TM9 further includes: a large delay CDD transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the large delay CDD transmission scheme and the transmit diversity transmission. The scheme replaces the transmit diversity transmission scheme of the first indication information management, that is, the transmission scheme corresponding to the DCI format 2A is used as the transmission scheme of the fallback mode in the TM9, and the second indication information indicates that the transmission scheme under the TM9 is changed to: a large delay The CDD transmission scheme, the transmit diversity transmission scheme, and the up to eight-stream transmission scheme are shown in Table 1.

Table 1

Method 2:

The transmission scheme corresponding to the DCI format 1A under the TM9 is replaced by the closed-loop spatial multiplexing transmission scheme corresponding to the DCI format 2 of the TM4, and the specific indication manner includes:

The first indication information acquired by the terminal is used to indicate that the transmission mode of the terminal is TM9, and a transmission scheme associated with the TM9, where the transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme.

The second indication information acquired by the terminal is used to indicate that the TM9 further includes: a closed loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the closed loop spatial multiplexing transmission scheme and the transmission. The diversity transmission scheme replaces the transmit diversity transmission scheme associated with the first indication information, and as the transmission scheme in the fallback mode, the second indication information indicates that the transmission scheme under the TM9 is changed to: a closed loop spatial multiplexing transmission scheme, and a transmit diversity transmission. The scheme and up to eight-stream transmission scheme are shown in Table 2.

Table 2

Method three:

The transmission scheme corresponding to the DCI format 1A of the TM10 is replaced by the large-delay CDD transmission scheme corresponding to the DCI format 2A of the TM3, and the specific indication manner includes:

The first indication information acquired by the terminal is used to indicate that the transmission mode of the terminal is TM10, and a transmission scheme associated with the TM10, where the transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme.

The second indication information acquired by the terminal is used to indicate that the TM10 further includes: a large delay CDD transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the large delay CDD transmission scheme and the transmission. The diversity transmission scheme replaces the transmit diversity transmission scheme associated with the first indication information, and uses the large delay CDD transmission scheme and the transmit diversity transmission scheme as a transmission scheme in a fallback mode to obtain a second indication information indication under the TM10 The transmission scheme was changed to: large delay CDD transmission scheme, transmit diversity transmission scheme, and up to eight-stream transmission scheme, as shown in Table 3.

table 3

Method 4:

The transmission scheme corresponding to the DCI format 1A of the TM10 is replaced by the closed-loop spatial multiplexing transmission scheme corresponding to the DCI format 2 of the TM4, and the specific indication manner includes:

The second indication information acquired by the terminal is used to indicate that the TM10 further includes: a closed loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the closed loop spatial multiplexing transmission scheme and the transmission. The diversity transmission scheme replaces the transmit diversity transmission associated with the first indication information, and uses the closed-loop spatial multiplexing transmission scheme and the transmit diversity transmission scheme as a transmission scheme in a fallback mode to obtain a second indication information indicating transmission under the TM10. The scheme is changed to: closed-loop spatial multiplexing transmission scheme, transmit diversity transmission scheme and multi-to-eight-stream transmission scheme, as shown in Table 4.

Table 4

It should be noted that the foregoing indication manners of only four transmission schemes may further include other indication manners, for example, the transmission scheme of the fallback mode in TM9 or TM10 is replaced by the transmission corresponding to one DCI format in TM5 to TM8. Alternatively, the transmission scheme in all transmission modes may be added to one transmission mode, and indicated by the first indication information and the second indication information, and the indication manner of the foregoing various indication transmission schemes is not Limited.

In addition, the “replacement” described in the embodiments of the present application may be understood as: replacing the corresponding transmission scheme in the new DCI format with the transmit diversity transmission scheme of the original DCI format 1A by using the second indication information, so that the new DCI format is used. The corresponding transmission scheme is used as a transmission scheme in the fallback mode, for example, a large delay CDD or a closed-loop spatial multiplexing transmission scheme is added as a transmission scheme in the TM9 or TM10 fallback mode by using the second indication information, thereby avoiding handover transmission. The scheme is a process that requires the base station to reconfigure through RRC signaling.

Optionally, due to the limitation of the transmission resource, the transmission scheme in the terminal transmission mode indicated by the first indication information and the second indication information still includes two DCI formats, and the two DCI formats may indicate two or more types. The transmission scheme is different in that the transmission scheme of the back-off mode of the replaced TM is not limited to the transmission diversity transmission scheme of the DCI format 1A, and the transmission scheme corresponding to other DCI formats can be arbitrarily added as needed, thereby improving configuration flexibility and improving The switching efficiency of the transmission scheme.

Optionally, in order to dynamically instruct the terminal to switch the transmission scheme according to different requirements, the method further includes: the terminal measures the channel quality, and reports the measurement result to the terminal, where the process is as follows:

The terminal acquires the CSI report configuration information from the base station, where the CSI report configuration information includes the first configuration information and the second configuration information, where the first configuration information is associated with the first transmission scheme, and the second configuration information is associated with the second a transmission scheme; the CSI reporting configuration information is used to indicate parameters required for the terminal to measure and report channel state information.

For example, the first configuration information and the second configuration information include a reference signal for calculating channel state information, the reference signal includes a CSI-RS and/or a CRS, and the terminal measures channel quality according to the reference signal, and Generating at least two channel state information CSI; for example, the terminal measures channel quality based on the CSI-RS and generates a first CSI, and measures channel quality based on the CRS and generates a second CSI, and finally the terminal sends the first CSI and the second CSI To the base station.

In the method provided by the embodiment, in the transmission mode TM9 or TM10, the base station dynamically indicates that the transmission scheme includes DC to eight-beam beamforming, large-delay CDD, and closed-loop spatial multiplexing through DCI; thereby implementing the base station according to the terminal. The channel state is a dynamic adjustment transmission scheme, so that a transmission scheme matching the channel condition can be configured to improve system performance.

In addition, the base station configures the fallback mode under TM9 or TM10 through RRC signaling, which has higher flexibility than the traditional reconfiguration method and reduces the complexity of the configuration. Moreover, the base station can configure the measurement signaling instruction given by the CSI, so that the CSI measurement result matches the transmission mode that the base station intends to adopt, thereby further improving the link adaptation performance.

In a specific embodiment, as shown in FIG. 5, the method includes the following steps:

Step 1: The base station generates RRC signaling.

The RRC signaling includes first indication information and second indication information, where the first indication information indicates a transmission mode of the terminal, for example, TM9; and the second indication information is used to indicate that a large delay is included under the TM9. CDD and transmit diversity are two transmission schemes.

In addition, according to the TM9 association specified in the pre-LTE protocol: two different transmission schemes: a transmit diversity and a multi-to-eight-beam beamforming transmission scheme, or a single antenna transmission scheme and a multi-to eight-wave beamforming transmission scheme, The UE determines the adopted transmission scheme by monitoring the format of the DCI in the downlink PDCCH. For example, if the detected DCI format is format2C, the transmission scheme used for downlink data transmission is up to eight-stream beamforming, if the detected DCI format is format1A. Then, the transmission scheme used for downlink data transmission is a transmit diversity or a single stream data transmission scheme. Therefore, the base station indicates the transmission mode (such as TM9) through the first indication information of the RRC signaling, and the two transmission schemes in the transmission mode.

The base station indicates, by using the second indication information, another transmission scheme, such as a large-delay CDD transmission scheme, where the indication information is used to indicate that the UE monitors the format of the downlink control channel PDCCH, which is used to replace the DCI associated with the back-off transmission scheme. format. For example, if the UE receives the transmission scheme indicated by the second indication information as a large delay CDD, the UE monitors the DCI format 2A and the DCI format 2C, and no longer detects the DCI format 1A. The UE determines the transmission scheme used by the base station data transmission by using the detected DCI format 2A or DCI format 2C.

Step 2: The base station sends the RRC signaling to the terminal.

Step 3: The terminal receives the RRC signaling from the base station, and measures the channel quality according to the reference signals CSI-RS and CRS respectively, obtains the measurement result, and sends the measurement result to the base station, so that the base station determines the transmission according to the measurement result. Program.

For example, the terminal measures the channel quality based on the CSI-RS and generates the first CSI, and measures the channel quality based on the CRS and generates the second CSI. Finally, the terminal reports the two CSIs to the base station. Specifically, the terminal is in the reported CSI data frame, the subframe 0 is used to carry the first CSI, the subframe 5 is used to carry the second CSI, and the base station periodically broadcasts the reference signals CSI-RS and CRS, so the terminal also cycles. The measurement result of the channel is reported to the base station.

Step 5: The base station receives the CSI of the terminal, and determines and generates DCI, that is, the second signaling, according to the CSI.

For example, if the channel quality measured by the CSI in the CSI received by the base station is higher based on the CSI-RS measurement, the DCI is determined to be the DCI format 1A of the TM9; if the channel quality measured based on the CRS is high, the DCI format 2A in which the DCI is determined as the TM3 is determined. So that the terminal uses the current high quality channel for PDSCH transmission.

Step 6: The base station sends a DCI to the terminal, where the DCI includes a DCI format or identifier of the PDSCH transmission.

Step 7: The terminal receives the DCI sent by the base station, decodes the DCI, and determines a PDSCH transmission scheme.

For example, if the terminal detects that the DCI format is 2C in the PDCCH detection process, the terminal adopts a beamforming transmission scheme corresponding to the DCI format 2A, and if the terminal detects that the DCI format is 2A, and the terminal is configured for transmission. The scheme is a large-delay CDD, and the fallback mode can be adopted as a large-delay CDD transmission scheme.

Step 8: The base station sends the PDSCH to the terminal through the large-delay CDD transmission scheme.

FIG. 6 is a schematic structural diagram of a transmission scheme indication apparatus provided by the present application. The device may be an access network device in the foregoing embodiment, for example, a base station, or may be configured on the base station to perform the transmission scheme indication method corresponding to FIG. 2 and FIG.

As shown in FIG. 6, the indication device includes: an obtaining unit 601, a processing unit 602, and a sending unit 603. In addition, the device may further include other units or modules, such as a storage unit, etc., which is not limited in this embodiment.

The processing unit 602 is configured to generate first signaling, where the first signaling includes first indication information and second indication information, where the first indication information is used to indicate a transmission mode of the terminal, and the second indication The information is used to indicate at least one transmission scheme of the terminal in the transmission mode, and the sending unit 603 is configured to send the first signaling to the terminal.

The transmission scheme includes: single antenna port transmission, transmit diversity transmission, large delay cyclic delay diversity transmission, closed loop spatial multiplexing transmission scheme, multi-user MIMO transmission scheme, single-stream beamforming transmission scheme, dual-stream beamforming A transmission scheme or one or more of up to eight-stream transmission schemes.

Optionally, the first indication information is further used to indicate a transmission scheme associated with the transmission mode, and the transmission scheme associated with the transmission mode and all transmission schemes indicated by the second indication information At least one different, or,

The first indication information is further used to indicate two or more transmission schemes associated with the transmission mode, and all the transmission schemes indicated by the two or more transmission schemes and the second indication information are At least one difference. For example, the first indication information is used to indicate that the associated transmission scheme includes a first transmission scheme and a second transmission scheme, and the first transmission scheme and the second transmission scheme are different from the third transmission scheme of the second indication information, and The first transmission scheme or the second transmission scheme is a transmission scheme in the fallback mode, and the second indication information is further used to indicate that the third transmission scheme is replaced by the first transmission scheme or the second transmission scheme. One.

Optionally, in a specific implementation manner of the embodiment, the processing unit 602 is further configured to generate, by using the at least two transmission schemes, the second signaling, the second The signaling is used to indicate that one transmission scheme is used for transmission of a downlink control channel in the at least two transmission schemes; and the sending unit 603 is further configured to send the second signaling.

Optionally, in another specific implementation manner of this embodiment, the second indication information includes an identifier, where the identifier is used to indicate a downlink control information DCI format, and the DCI format is associated with at least one transmission scheme. .

Optionally, in another specific implementation manner of this embodiment, the first signaling is controlled by a radio resource control RRC; and the second signaling is carried by a physical downlink control channel PDCCH.

Further, in another specific implementation manner of this embodiment, the first indication information is used to indicate that the transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, The transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

The second indication information is used to indicate that the transmission mode 9 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the large delay cycle delay. The diversity transmission scheme and the transmit diversity transmission scheme replace the transmit diversity transmission scheme associated with the first indication information, and the obtained transmission scheme indicating the transmission mode 9 is: a large delay cyclic delay diversity transmission scheme, a transmit diversity transmission scheme, and Up to eight-stream transmission scheme.

Or the first indication information is used to indicate that the transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme includes: a transmit diversity transmission and a multi-to-eight-stream transmission scheme. The second indication information is used to indicate that the transmission mode 9 further includes: a closed-loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the closed-loop spatial multiplexing transmission scheme. Transmitting a transmission diversity scheme associated with the first indication information by using a transmit diversity transmission scheme, and obtaining a transmission scheme indicating that the transmission mode 9 is: a closed loop spatial multiplexing transmission scheme, a transmit diversity transmission scheme, and a multi-to-eight-channel transmission Program.

Or the first indication information is used to indicate that the transmission mode of the terminal is the transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission and a multi-to-eight-stream transmission scheme. The second indication information is used to indicate that the transmission mode 10 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the large delay loop The delay diversity transmission scheme and the transmit diversity transmission scheme replace the transmit diversity transmission scheme associated with the first indication information, and the obtained transmission scheme indicating the transmission mode 10 is: a large delay cyclic delay diversity transmission scheme, a transmit diversity transmission scheme And up to eight-stream transmission schemes.

Or the first indication information is used to indicate that the transmission mode of the terminal is the transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-channel transmission The second indication information is further used to indicate that the transmission mode 10 further includes: a closed-loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and the second indication information is further used to indicate the closed-loop spatial multiplexing transmission. The scheme and the transmit diversity transmission scheme replace the transmit diversity transmission scheme associated with the first indication information, and the obtained transmission scheme indicating the transmission mode 10 is: a closed loop spatial multiplexing transmission scheme, a transmit diversity transmission scheme, and up to eight streams Transmission scheme.

At a specific implementation level, the embodiment of the present application further provides an access network device, such as a base station. As shown in FIG. 7, the base station is used to implement the method steps in the foregoing embodiments.

As shown in FIG. 7, the base station may include a transceiver 701, a processor 702, and a memory 703, and the transceiver 701 may include components such as a receiver, a transmitter, and an antenna. The base station may also include more or less components, or a combination of certain components, or different component arrangements, which is not limited in this application.

The processor 701 is a control center of the base station, and connects various parts of the entire network device by using various interfaces and lines, by running or executing software programs and/or modules stored in the memory 703, and calling data stored in the memory, Perform various functions and/or process data of the base station.

The processor 702 may be composed of an integrated circuit (IC), for example, may be composed of a single packaged IC, or may be composed of a plurality of packaged ICs that have the same function or different functions. For example, the processor may include only a CPU, or may be a combination of a GPU, a digital signal processor (DSP), and a control chip (eg, a baseband chip) in the transceiver module.

The transceiver 701 is configured to establish a communication connection with a terminal, such as a UE, and perform data transmission. Specifically, the transceiver 701 may include a wireless local area network (WLAN) module, a Bluetooth module, a baseband module, and the like, and a radio frequency (RF) circuit corresponding to the communication module. Used for wireless local area network communication, Bluetooth communication, infrared communication and/or cellular communication system communication. The transceiver module is configured to control communication of components in the base station and can support direct memory access.

In various embodiments of the present application, various transceiver modules in the transceiver 701 generally appear in the form of integrated circuit chips, and can be selectively combined without including all transceiver modules and corresponding Antenna group.

For example, the transceiver 701 can include only baseband chips, radio frequency chips, and corresponding antennas to provide communication functionality in a cellular communication system. The terminal can be connected to a cellular network or the internet via a wireless communication connection established by the transceiver module, such as wireless local area network access or WCDMA access.

In some optional implementation manners of the present application, a communication module in the transceiver module, such as a baseband module, may be integrated into the processor, and the radio frequency circuit is used for receiving and transmitting signals during information transmission or reception or during a call. For example, the uplink information of the UE is received and sent to the processor for processing; in addition, the designed downlink data is sent to the UE. Generally, the radio frequency circuit includes well-known circuits for performing these functions, including but not limited to an antenna system, a radio frequency transceiver, one or more amplifiers, a tuner, one or more oscillators, a digital signal processor, a codec. (codec) chipset, subscriber identity module (SIM) card, memory, etc.

The memory 703 is configured to store application code that executes the technical solution of the present application, and is controlled by a processor. The processor is configured to execute application code stored in the memory.

Further, the memory may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or a storable information and Other types of dynamic storage devices of instructions may also be Electrically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CD-ROM) or other optical discs. Storage, optical storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic storage media or other magnetic storage devices, or capable of carrying or storing desired program code in the form of instructions or data structures And any other medium that can be accessed by a computer, but is not limited thereto. The memory can exist independently or be integrated with the processor.

In the device embodiment of the present application, the functions to be implemented by the obtaining unit 601 and the sending unit 603 may be implemented by the transceiver 701 of the base station or by the transceiver 701 controlled by the processor 702; the processing unit 602 The functions to be implemented can then be implemented by the processor 702.

A "unit" in the above embodiments may refer to an application-specific integrated circuit (ASIC), a processor and memory that execute one or more software or firmware programs, integrated logic circuits, and/or others that may provide The device for the above functions.

In another embodiment, the present application further provides a transmission scheme indicating device, which has the same structure as that shown in FIG. 6 and is used to implement the method steps of the terminal side of the foregoing embodiment. Specifically, the method is described. The apparatus includes an acquisition unit, a processing unit, and a transmission unit, and may further include a storage unit or the like.

The acquiring unit is configured to obtain the first signaling, where the first signaling includes first indication information and second indication information, where the first indication information is used to indicate a transmission mode of the terminal, and the second indication information is used. At least one transmission scheme for indicating the terminal in the transmission mode; the processing unit, configured to determine the transmission mode according to the first indication information, and determine the transmission mode according to the second indication information At least one transmission scheme.

Optionally, in a specific implementation manner of this embodiment, the first indication information is further used to indicate a transmission scheme associated with the transmission mode, and the transmission scheme and the association associated with the transmission mode At least one of all transmission schemes indicated by the second indication information is different; or the first indication information is further used to indicate two or more transmission schemes associated with the transmission mode, and the two or At least one of the two or more transmission schemes and all of the transmission schemes indicated by the second indication information are different;

Optionally, in another specific implementation manner of this embodiment, the acquiring unit is further configured to acquire the second signaling when the transmission mode includes at least two transmission schemes; And determining, according to the second signaling, determining one transmission scheme in the at least two transmission schemes, and using the demodulation for the downlink data channel.

Optionally, in another specific implementation manner of this embodiment, the processing unit is specifically configured to parse the second signaling to obtain a DCI format, where the DCI format is associated with at least one transmission scheme; The DCI format and an association relationship between the DCI format and at least one transmission scheme in the transmission mode determine a target transmission scheme; and the target transmission scheme is used to perform demodulation of the downlink data channel.

The first signaling is carried by the RRC; the second signaling is carried by the PDCCH.

Further, the processing unit is specifically configured to perform the following functions:

Determining, according to the first indication information, a transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme comprising: a transmit diversity transmission and a multi-to-eight-stream transmission scheme; The second indication information determining that the transmission mode 9 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and obtaining the indication of the transmission The transmission schemes in mode 9 are: a large delay cyclic delay diversity transmission scheme, a transmit diversity transmission scheme, and a multi-to-eight-stream transmission scheme.

or,

Determining, according to the first indication information, a transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme comprising: a transmit diversity transmission and a multi-to-eight-stream transmission scheme; The determining, by the second indication information, the transmission mode 9 further includes: a closed-loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and obtaining the indication of the transmission mode 9 The following transmission schemes are: closed-loop spatial multiplexing transmission scheme, transmit diversity transmission scheme, and up to eight-stream transmission scheme.

or,

Determining, according to the first indication information, a transmission mode of the terminal is a transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission and a multi-to-eight-stream transmission scheme; The second indication information determining that the transmission mode 10 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and obtaining the indication of the transmission The transmission schemes in mode 10 are: a large delay cyclic delay diversity transmission scheme, a transmit diversity transmission scheme, and a multi-to-eight-stream transmission scheme.

or,

Determining, according to the first indication information, a transmission mode of the terminal is a transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission and a multi-to-eight-stream transmission scheme; The determining, by the second indication information, the transmission mode 10 further includes: a closed-loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and obtaining the indication of the transmission mode 10 The following transmission schemes are: closed-loop spatial multiplexing transmission scheme, transmit diversity transmission scheme, and up to eight-stream transmission scheme.

Optionally, in another specific implementation manner of this embodiment, the acquiring unit is further configured to acquire a reference signal, where the processing unit is further configured to measure channel quality according to the reference signal, and generate at least a channel state information CSI, wherein the at least one CSI is used to determine the second signaling, each of the CSIs corresponds to a transmission scheme, and the sending unit is configured to send the at least one CSI.

In a particular hardware implementation, the apparatus can be implemented by any terminal, such as a UE, which includes components such as a transceiver, a processor, and a memory. The functions to be implemented by the acquiring unit and the sending unit may be implemented by a transceiver of the UE or by a transceiver controlled by the processor; the function to be implemented by the processing unit may be implemented by a processor of the UE. .

Further, the memory is for storing a computer program product comprising one or more computer instructions, such as channel quality measurement instructions, transmission scheme switching instructions, and the like. When the computer loads and executes the computer program, the processes or functions described in accordance with the above-described embodiments of the present application are generated in whole or in part.

The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a network site, computer, server or data center Transfer to another site, computer, or server by wire or wirelessly. The computer readable storage medium may be a magnetic disk, an optical disk, a read only memory ROM or a random access memory RAM or the like.

In the present application, "at least one" and "at least one" mean one or more, and "multiple" means two or more. "and/or", describing the association relationship of the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, A and B exist at the same time, and B exists separately, where A, B can be singular or plural. The character "/" generally indicates that the contextual object is an "or" relationship. "At least one of the following" or a similar expression thereof refers to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, or c may represent: a, b, c, ab, ac, bc, or abc, where a, b, c may be single or multiple .

It will be apparent to those skilled in the art that the techniques in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution in the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which may be stored in a storage medium such as a ROM/RAM. , a disk, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

The same and similar parts between the various embodiments in this specification can be referred to each other. In particular, for the embodiment of the device, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant points can be referred to the description in the method embodiment.

The embodiments of the present application described above are not intended to limit the scope of the present application.

Claims

A transmission scheme indication method, the method comprising:

Generating a first signaling, where the first signaling includes first indication information and second indication information, where the first indication information is used to indicate a transmission mode of the terminal, and the second indication information is used to indicate that the terminal is At least one transmission scheme in the transmission mode;

Transmitting the first signaling to the terminal.
The method of claim 1 wherein

The first indication information is further used to indicate a transmission scheme associated with the transmission mode, and the transmission scheme associated with the transmission mode is different from at least one of all transmission schemes indicated by the second indication information.
The method of claim 1 wherein

The first indication information is further used to indicate a first transmission scheme and a second transmission scheme that are associated with the transmission mode, where the first transmission scheme and the second transmission scheme are all indicated by the second indication information At least one of the transmission schemes is different;

The second indication information is further used to indicate that the at least one transmission scheme replaces one of the first transmission scheme and the second transmission scheme.
The method according to claim 1 or 3, wherein the method further comprises:

And generating, in the case that the transmission mode includes at least two transmission schemes, a second signaling, where the second signaling is used to indicate, in the at least two transmission schemes, a solution that is used as a downlink data channel Tune

Sending the second signaling.
The method of claim 1 wherein

The second indication information includes an identifier, the identifier is used to indicate a downlink control information DCI format, and the DCI format is associated with at least one transmission scheme.
The method according to any one of claims 1 to 5, wherein the first signaling is carried by a radio resource control RRC.
The method according to claim 4, wherein the second signaling is carried by a physical downlink control channel PDCCH.
The method according to any one of claims 1 to 7, wherein the first indication information is used to indicate a transmission mode of the terminal, and the second indication information is used to indicate that the terminal is in the transmission mode. At least one transmission scheme, including the following:

The first indication information is used to indicate that the transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme comprising: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

The second indication information is used to indicate that the transmission mode 9 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and replace the transmit diversity transmission scheme associated with the first indication information, and obtain an indication The transmission scheme in the transmission mode 9 is: a large delay cyclic delay diversity transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

The first indication information is used to indicate that the transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme comprising: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

The second indication information is used to indicate that the transmission mode 9 further includes: a closed-loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and the obtained indication is The transmission scheme in transmission mode 9 is: a closed-loop spatial multiplexing transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

The first indication information is used to indicate that the transmission mode of the terminal is the transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

The second indication information is used to indicate that the transmission mode 10 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and replace the transmit diversity transmission scheme associated with the first indication information, and obtain an indication The transmission scheme in the transmission mode 10 is: a large delay cyclic delay diversity transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

The first indication information is used to indicate that the transmission mode of the terminal is the transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

The second indication information is used to indicate that the transmission mode 10 further includes: a closed loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and the obtained indication is The transmission scheme in transmission mode 10 is: a closed-loop spatial multiplexing transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme.
The method according to any one of claims 1 to 8, wherein in the at least one transmission scheme indicated by the second indication information, the transmission scheme comprises:

Single antenna port transmission scheme, transmit diversity transmission scheme, large delay cyclic delay diversity transmission scheme, closed loop spatial multiplexing transmission scheme, multi-user MIMO transmission scheme, single-stream beamforming transmission scheme, dual-stream beamforming transmission scheme or multiple Eight-stream transmission scheme.
A transmission scheme indication method, the method comprising:

Acquiring the first signaling, where the first signaling includes first indication information and second indication information, where the first indication information is used to indicate a transmission mode of the terminal, and the second indication information is used to indicate that the terminal is in At least one transmission scheme in the transmission mode;

Determining the transmission mode according to the first indication information, and determining at least one transmission scheme in the transmission mode according to the second indication information.
The method of claim 10 wherein:

The first indication information is further used to indicate a transmission scheme associated with the transmission mode, and the transmission scheme associated with the transmission mode is different from at least one of all transmission schemes indicated by the second indication information.
The method of claim 10 wherein:

The first indication information is further used to indicate a first transmission scheme and a second transmission scheme that are associated with the transmission mode, where the first transmission scheme and the second transmission scheme are all indicated by the second indication information At least one of the transmission schemes is different;

The second indication information is further used to indicate that the at least one transmission scheme replaces one of the first transmission scheme and the second transmission scheme.
The method of claim 10 or 12, wherein the method further comprises:

Acquiring the second signaling if the transmission mode includes at least two transmission schemes;

And determining, according to the second signaling, one transmission scheme in the at least two transmission schemes, and using the demodulation for the downlink data channel.
The method according to claim 13, wherein determining one transmission scheme in the at least two transmission schemes according to the second signaling and using the same for the demodulation of the downlink data channel comprises:

Parsing the second signaling to obtain a DCI format, where the DCI format is associated with at least one transmission scheme;

Determining a target transmission scheme according to the DCI format and an association relationship between the DCI format and at least one transmission scheme in the transmission mode;

Demodulation of the downlink data channel is performed according to the target transmission scheme.
The method according to any one of claims 10 to 14, wherein the first signaling is carried by a radio resource control RRC.
The method according to claim 13, wherein the second signaling is carried by a physical downlink control channel PDCCH.
The method according to any one of claims 10 to 16, wherein the transmission mode is determined according to the first indication information, and at least one transmission in the transmission mode is determined according to the second indication information. The program includes the following:

Determining, according to the first indication information, a transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme comprising: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

Determining, according to the second indication information, that the transmission mode 9 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and obtaining the indication indication The transmission schemes in the transmission mode 9 are: a large delay cyclic delay diversity transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

Determining, according to the first indication information, a transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme comprising: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

Determining, according to the second indication information, that the transmission mode 9 further includes: a closed-loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and obtaining the indication of the transmission The transmission scheme in mode 9 is: a closed-loop spatial multiplexing transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

Determining, according to the first indication information, a transmission mode of the terminal, a transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

Determining, according to the second indication information, that the transmission mode 10 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and obtaining the indication indication The transmission schemes in the transmission mode 10 are: a large delay cyclic delay diversity transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

Determining, according to the first indication information, a transmission mode of the terminal, a transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

Determining, according to the second indication information, that the transmission mode 10 further includes: a closed-loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and obtaining the indication of the transmission The transmission schemes in mode 10 are: closed-loop spatial multiplexing transmission scheme, transmit diversity transmission scheme, and multi-to-eight-stream transmission scheme.
The method according to any one of claims 10 to 17, wherein the method further comprises:

Obtaining a reference signal;

Measure the channel quality according to the reference signal, and generate at least one channel state information CSI, where each of the CSIs corresponds to one transmission scheme;

Sending the at least one CSI.
A transmission scheme indicating device, characterized in that the device comprises:

a processing unit, configured to generate first signaling, where the first signaling includes first indication information and second indication information, where the first indication information is used to indicate a transmission mode of the terminal, and the second indication information is used to Indicating at least one transmission scheme of the terminal in the transmission mode;

And a sending unit, configured to send the first signaling to the terminal.
The device according to claim 19, characterized in that

The first indication information is further used to indicate a transmission scheme associated with the transmission mode, and the transmission scheme associated with the transmission mode is different from at least one of all transmission schemes indicated by the second indication information,

or;

The first indication information is further used to indicate a first transmission scheme and a second transmission scheme that are associated with the transmission mode, where the first transmission scheme and the second transmission scheme are all indicated by the second indication information At least one of the transmission schemes is different;

The second indication information is further used to indicate that the at least one transmission scheme replaces one of the first transmission scheme and the second transmission scheme.
Device according to claim 19 or 20, characterized in that

The processing unit is further configured to: when the transmission mode includes at least two transmission schemes, generate second signaling, where the second signaling is used to indicate one transmission in the at least two transmission schemes The scheme is used for demodulation of a downlink data channel;

The sending unit is further configured to send the second signaling.
The device according to claim 19, characterized in that

The second indication information includes an identifier, the identifier is used to indicate a downlink control information DCI format, and the DCI format is associated with at least one transmission scheme.
The apparatus according to any one of claims 19 to 22, wherein the first signaling is carried by a radio resource control RRC.
The apparatus according to claim 21, wherein the second signaling is carried by a physical downlink control channel PDCCH.
Apparatus according to any one of claims 19 to 24, wherein

The first indication information is used to indicate that the transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme comprising: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

The second indication information is used to indicate that the transmission mode 9 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and replace the transmit diversity transmission scheme associated with the first indication information, and obtain an indication The transmission scheme in the transmission mode 9 is: a large delay cyclic delay diversity transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

The first indication information is used to indicate that the transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme comprising: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

The second indication information is used to indicate that the transmission mode 9 further includes: a closed-loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and the obtained indication is The transmission scheme in transmission mode 9 is: a closed-loop spatial multiplexing transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

The first indication information is used to indicate that the transmission mode of the terminal is the transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

The second indication information is used to indicate that the transmission mode 10 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and replace the transmit diversity transmission scheme associated with the first indication information, and obtain an indication The transmission scheme in the transmission mode 10 is: a large delay cyclic delay diversity transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

The first indication information is used to indicate that the transmission mode of the terminal is the transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

The second indication information is used to indicate that the transmission mode 10 further includes: a closed loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and the obtained indication is The transmission scheme in transmission mode 10 is: a closed-loop spatial multiplexing transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme.
A transmission scheme indicating device, characterized in that the device comprises:

An acquiring unit, configured to acquire first signaling, where the first signaling includes first indication information and second indication information, where the first indication information is used to indicate a transmission mode of the terminal, and the second indication information is used to Indicating at least one transmission scheme of the terminal in the transmission mode;

a processing unit, configured to determine the transmission mode according to the first indication information, and determine at least one transmission scheme in the transmission mode according to the second indication information.
The device of claim 26, wherein

The first indication information is further used to indicate a transmission scheme associated with the transmission mode, and the transmission scheme associated with the transmission mode is different from at least one of all transmission schemes indicated by the second indication information.
The device of claim 26, wherein

The first indication information is further used to indicate a first transmission scheme and a second transmission scheme that are associated with the transmission mode, where the first transmission scheme and the second transmission scheme are all indicated by the second indication information At least one of the transmission schemes is different;

The second indication information is further used to indicate that the at least one transmission scheme replaces one of the first transmission scheme and the second transmission scheme.
Device according to claim 26 or 28, characterized in that

The acquiring unit is further configured to acquire the second signaling if the transmission mode includes at least two transmission schemes;

The processing unit is further configured to determine, according to the second signaling, one transmission scheme in the at least two transmission schemes, and use the demodulation of the downlink data channel.
The device according to claim 29, wherein

The processing unit is specifically configured to parse the second signaling to obtain a DCI format, where the DCI format is associated with at least one transmission scheme; and according to the DCI format and the DCI format and at least one of the transmission modes The association relationship of the transmission scheme determines a target transmission scheme; and, according to the target transmission scheme, performs demodulation of the downlink data channel.
The device according to any one of claims 26 to 30, wherein the processing unit is specifically configured to perform the following functions:

Determining, according to the first indication information, a transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme comprising: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

Determining, according to the second indication information, that the transmission mode 9 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and obtaining the indication indication The transmission schemes in the transmission mode 9 are: a large delay cyclic delay diversity transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

Determining, according to the first indication information, a transmission mode of the terminal is a transmission mode 9, and a transmission scheme associated with the transmission mode 9, the transmission scheme comprising: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

Determining, according to the second indication information, that the transmission mode 9 further includes: a closed-loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and obtaining the indication of the transmission The transmission scheme in mode 9 is: a closed-loop spatial multiplexing transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

Determining, according to the first indication information, a transmission mode of the terminal, a transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission scheme and a multi-to-eight-stream transmission scheme;

Determining, according to the second indication information, that the transmission mode 10 further includes: a large delay cyclic delay diversity transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and obtaining the indication indication The transmission schemes in the transmission mode 10 are: a large delay cyclic delay diversity transmission scheme, a transmission diversity transmission scheme, and a multi-to-eight-stream transmission scheme;

or,

Determining, according to the first indication information, a transmission mode of the terminal, a transmission mode 10, and a transmission scheme associated with the transmission mode 10, where the transmission scheme includes: a transmit diversity transmission and a multi-to-eight-stream transmission scheme;

Determining, according to the second indication information, that the transmission mode 10 further includes: a closed-loop spatial multiplexing transmission scheme and a transmit diversity transmission scheme, and replacing the transmit diversity transmission scheme associated with the first indication information, and obtaining the indication of the transmission The transmission schemes in mode 10 are: closed-loop spatial multiplexing transmission scheme, transmit diversity transmission scheme, and multi-to-eight-stream transmission scheme.
The apparatus according to any one of claims 26 to 31, further comprising a transmitting unit,

The obtaining unit is further configured to acquire a reference signal;

The processing unit is further configured to: measure channel quality according to the reference signal, and generate at least one channel state information CSI, where each CSI corresponds to one transmission scheme;

The sending unit is configured to send the at least one CSI.
A computer storage medium characterized by comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 9.
A computer storage medium characterized by comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 10 to 18.