An information transmission method, device and computer readable storage medium

Abstract

Embodiments of the present application provide an information transmission method, device and computer readable storage medium, the method comprising: a base station at least sends the combination information of the length L of data to be transmitted, the base station overlap transmission factor K and the filter roll-off factor alpha, for determining the equivalent channel of the virtual antenna system.

Description

TECHNICAL FIELD

[0001] The present application relates to the virtual antenna technology in the field of mobile communication technology, and particularly relates to an information transmission method and device and a computer readable storage medium. BACKGROUND

[0002] In the existing LTE and 5G NR systems, MIMO is a key technology to improve the system capacity. Facing the demand for higher system capacity of 6G, the virtual antenna technology opens up a new way to continuously improve the MIMO spatial multiplexing capability by modifying the transmission channel matrix. In the virtual antenna system, the base station end introduces an overlap transmission factor K, so that each transmit antenna transmits the transmit signal asynchronously with an equal interval delay of 1 / K; the receiving end introduces an oversampling factor G to oversample the received signal at a super-Nyquist rate to obtain G-1 virtual receiving antennas, at this time the dimension of the transmission channel matrix changes due to the oversampling processing. Through the above processing, the terminal in the virtual antenna system forms multiple virtual receiving antennas, so the number of data streams that can be solved will not be less than the number of physical antennas, thereby obtaining additional spatial multiplexing gain and virtual diversity reception gain.

[0003] The channel estimation process in the traditional LTE and NR MIMO system is independent of the length of the reference signal and the filter used, so the base station does not need to inform the terminal of the length of the reference signal and the filter information. In the virtual antenna system, due to the asynchronous transmission at the transmitting end and the oversampling at the terminal, the terminal needs to obtain the related information of the filter to accurately estimate the channel. SUMMARY

[0004] Therefore, the embodiments of the present application aim to provide an information transmission method, device and computer readable storage medium.

[0005] To achieve the above-mentioned purpose, the technical scheme of the embodiments of the present application is as follows:

[0006] The embodiments of the present application provide an information transmission method, which is applied to a base station and includes the following steps:

[0007] At least the combination information of the length L of the data to be transmitted, the overlap transmission factor K of the base station and the filter roll-off factor a is sent, which is used to determine the equivalent channel of the virtual antenna system.

[0008] The combination information of the length L of the data to be transmitted, the overlap transmission factor K of the base station and the filter roll-off factor a includes the following information:

[0009] The combination information of the length L of the data to be transmitted, the overlap transmission factor K of the base station and the filter roll-off factor a is sent through broadcasting, radio resource control protocol RRC message or downlink control information DCI.

[0010] Optionally, the method further includes the following steps:

[0011] The reference signal is transmitted in a synchronous non-overlapping mode, and is used to determine an actual channel.

[0012] Optionally, the method further comprises:

[0013] The data signal is transmitted in an asynchronous overlapping mode.

[0014] Optionally, the method further comprises:

[0015] The combination information of the updated to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is transmitted.

[0016] The embodiment of the application further provides an information transmission method, which is applied to a terminal and comprises the following steps:

[0017] The combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is received.

[0018] The equivalent channel of the virtual antenna system is determined based on the combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a.

[0019] The combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is received, and comprises the following steps:

[0020] The combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is received through broadcasting, a radio resource control protocol (RRC) message or downlink control information (DCI).

[0021] The equivalent channel of the virtual antenna system is determined based on the combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a, and comprises the following steps:

[0022] The actual channel H is determined based on the reference signal.

[0023] The equivalent channel of the virtual antenna system is determined based on the combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a and the actual channel H, and is used for reporting channel state information (CSI) or performing data demodulation.

[0024] Optionally, the method further comprises:

[0025] The reference signal transmitted in the synchronous non-overlapping mode is received, and is used to determine the actual channel.

[0026] Optionally, the method further comprises:

[0027] The data signal transmitted in the asynchronous overlapping mode is received.

[0028] Optionally, the method further comprises:

[0029] Receiving the combined information of the updated to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a, for determining the equivalent channel of the virtual antenna system.

[0030] The embodiment of the present application also provides an information transmission device, which is applied to a base station and comprises:

[0031] The first sending module is used for sending the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a, for determining the equivalent channel of the virtual antenna system.

[0032] The embodiment of the present application also provides an information transmission device, which is applied to a terminal and comprises:

[0033] The receiving module is used for receiving the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a.

[0034] The processing module is used for determining the equivalent channel of the virtual antenna system based on the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a.

[0035] The embodiment of the present application also provides an information transmission device, which comprises a processor and a memory for storing a computer program capable of running on the processor,

[0036] When the processor runs the computer program, the steps of the above method are executed.

[0037] The embodiment of the present application also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps of the above method.

[0038] The information transmission method, device and computer readable storage medium provided by the embodiment of the present application are characterized in that the base station sends the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a, for determining the equivalent channel of the virtual antenna system. The terminal estimates the channel information more accurately based on the to-be-transmitted data stream length L, the base station overlapping transmission factor K, the filter roll-off factor a and the reference signal and other information notified by the base station, and then reports the more accurate CSI or demodulates the data more accurately. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The information transmission method flowchart of the embodiment of the present application Figure 1 ;

[0040] Figure 2The information transmission method flowchart shown in the embodiment of the present application Figure 2 ;

[0041] Figure 3 The information transmission method flowchart shown in the embodiment of the present application Figure 3 ;

[0042] Figure 4 The information transmission device structure shown in the embodiment of the present application Figure 1 ;

[0043] Figure 2 The information transmission device structure shown in the embodiment of the present application Figure 6 ;

[0044] Figure 1 The virtual antenna system block diagram. DETAILED DESCRIPTION

[0045] The present application will be described below in conjunction with the accompanying drawings and embodiments.

[0046] The embodiment of the present application provides an information transmission method, as shown in the figure, the method is applied to a base station, and comprises the following steps. Figure 1

[0047] Step 101: at least sending the combination information of the length L of to-be-transmitted data, the base station overlapping transmission factor K and the filter roll-off factor α, which are used for determining the equivalent channel of a virtual antenna system.

[0048] The terminal of the embodiment of the present application can more accurately estimate the channel information based on the information of the length L of to-be-transmitted data, the base station overlapping transmission factor K and the filter roll-off factor α and the reference signal notified by the base station, and then report more accurate CSI or more accurately demodulate data.

[0049] In one embodiment, the combination information of the length L of to-be-transmitted data, the base station overlapping transmission factor K and the filter roll-off factor α comprises the following.

[0050] The combination information of the length L of to-be-transmitted data, the base station overlapping transmission factor K and the filter roll-off factor α is sent through broadcasting, a radio resource control protocol RRC message or downlink control information DCI.

[0051] In one embodiment of the present application, as shown in the figure, the method further comprises the following steps. Figure 2

[0052] Step 102: sending the reference signal through a synchronous non-overlapping mode, which is used for determining an actual channel, so as to ensure that the terminal can accurately estimate the channel information.

[0053] In one embodiment of the present application, as shown in the figure, the method further comprises the following steps. Figure 3 ​​​

[0054] Step 103: transmitting the data signal in an asynchronous overlapping manner to improve multiplexing performance of the system.

[0055] In one embodiment of the present application, the method further comprises:

[0056] transmitting combined information of the updated to-be-transmitted data length L, the base station overlapping transmission factor K, and the filter roll-off factor a.

[0057] The embodiment of the present application further provides an information transmission method, as shown in the figure, the method is applied to a terminal and comprises: Figure 4

[0058] Step 301: receiving combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K, and the filter roll-off factor a.

[0059] Step 302: determining an equivalent channel of a virtual antenna system based on the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K, and the filter roll-off factor a.

[0060] In the embodiment of the present application, the receiving of the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K, and the filter roll-off factor a comprises:

[0061] The combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K, and the filter roll-off factor a is received through broadcasting, a radio resource control protocol RRC message, or downlink control information DCI.

[0062] In one embodiment of the present application, the determining of the equivalent channel of the virtual antenna system based on the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K, and the filter roll-off factor a comprises:

[0063] determining an actual channel H based on a reference signal;

[0064] determining the equivalent channel of the virtual antenna system based on the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K, and the filter roll-off factor a, and the actual channel H, and the equivalent channel is used for reporting of channel state information CSI or data demodulation.

[0065] In one embodiment of the present application, the method further comprises:

[0066] receiving a reference signal transmitted in a synchronous non-overlapping manner, and the reference signal is used for determining an actual channel.

[0067] In one embodiment of the present application, the method further comprises:

[0068] receiving a data signal transmitted in an asynchronous overlapping manner.

[0069] ​In one embodiment of the present application, the method further comprises:

[0070] The combination information of the updated to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is received, and is used to determine the equivalent channel of the virtual antenna system.

[0071] In order to implement the above-mentioned method embodiment, an information transmission device is further provided in an embodiment of the present application, as shown in the figure, the device is applied to a base station, and comprises: Figure 4

[0072] The first sending module 401 is used for sending at least the combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a, and is used to determine the equivalent channel of the virtual antenna system.

[0073] Of course, in actual application, the device can further comprise a storage module, a receiving module (used for receiving information sent by a terminal) and the like, which are not embodied in the present application. Figure 4

[0074] In one embodiment, the first sending module 401 sends the combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a, which comprises:

[0075] The combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is sent through broadcasting, a radio resource control protocol RRC message or downlink control information DCI.

[0076] In one embodiment of the present application, as shown in the figure, the device further comprises a second sending module 402, which is used for sending a reference signal through a synchronous non-overlapping mode, and is used for determining an actual channel, so as to ensure that a terminal can accurately estimate channel information. Figure 5

[0077] In one embodiment of the present application, the second sending module 402 is further used for sending a data signal through an asynchronous overlapping mode, so as to improve the multiplexing performance of the system.

[0078] In one embodiment of the present application, the first sending module 401 is further used for sending the combination information of the updated to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a.

[0079] An information transmission device is further provided in an embodiment of the present application, as shown in the figure, the device is applied to a terminal, and comprises: Figure 6

[0080] The receiving module 501 is used for receiving the combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a.

[0081] ​​​​The processing module 502 is configured to determine the equivalent channel of the virtual antenna system based on the combined information of the data length L, the base station overlapping transmission factor K and the filter roll-off factor a.

[0082] In the embodiment of the present application, the receiving module 501 receives the combined information of the data length L, the base station overlapping transmission factor K and the filter roll-off factor a, which comprises:

[0083] The combined information of the data length L, the base station overlapping transmission factor K and the filter roll-off factor a is received through broadcasting, a radio resource control protocol (RRC) message or downlink control information (DCI).

[0084] In one embodiment of the present application, the processing module 502 determines the equivalent channel of the virtual antenna system based on the combined information of the data length L, the base station overlapping transmission factor K and the filter roll-off factor a, which comprises:

[0085] The actual channel H is determined based on the reference signal.

[0086] The equivalent channel of the virtual antenna system is determined based on the combined information of the data length L, the base station overlapping transmission factor K and the filter roll-off factor a and the actual channel H, which is used for reporting channel state information (CSI) or performing data demodulation.

[0087] In one embodiment of the present application, the receiving module 501 is further configured to receive the reference signal transmitted through the synchronous non-overlapping mode, and determine the actual channel.

[0088] In one embodiment of the present application, the receiving module 501 is further configured to receive the data signal transmitted through the asynchronous overlapping mode.

[0089] In one embodiment of the present application, the receiving module 501 is further configured to receive the updated combined information of the data length L, the base station overlapping transmission factor K and the filter roll-off factor a, and determine the equivalent channel of the virtual antenna system.

[0090] The embodiment of the present application further provides an information transmission device, which comprises a processor and a memory for storing a computer program capable of running on the processor,

[0091] When the processor runs the computer program, the processor is configured to perform the following steps:

[0092] The combined information of the data length L, the base station overlapping transmission factor K and the filter roll-off factor a is at least transmitted, and is used for determining the equivalent channel of the virtual antenna system.

[0093] The processor is further configured to execute the computer program to perform the following when the combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is sent.

[0094] The combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is sent through broadcasting, a radio resource control protocol (RRC) message or downlink control information (DCI).

[0095] The processor is further configured to execute the computer program to perform the following:

[0096] The reference signal is sent in a synchronous non-overlapping manner to determine an actual channel.

[0097] The processor is further configured to execute the computer program to perform the following:

[0098] The data signal is sent in an asynchronous overlapping manner.

[0099] The processor is further configured to execute the computer program to perform the following:

[0100] The combination information of the updated to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is sent.

[0101] The embodiment of the present application further provides an information transmission device, which comprises a processor and a memory for storing a computer program capable of being run on the processor,

[0102] The processor is configured to execute the computer program to perform the following when the combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is received.

[0103] The combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is received.

[0104] The equivalent channel of the virtual antenna system is determined based on the combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a.

[0105] The processor is further configured to execute the computer program to perform the following when the combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is received.

[0106] The combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is received through broadcasting, a radio resource control protocol (RRC) message or downlink control information (DCI).

[0107] The processor is further configured to execute the computer program to perform the following when the equivalent channel of the virtual antenna system is determined based on the combination information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a.

[0108] determining the actual channel H based on the reference signal;

[0109] determining the equivalent channel of the virtual antenna system based on the combination of the length L of the data to be transmitted, the base station overlapping transmission factor K and the filter roll-off factor a, and the actual channel H, for reporting the channel state information CSI or performing data demodulation.

[0110] The processor is further configured to execute the computer program to perform:

[0111] receiving the reference signal transmitted by the synchronous non-overlapping manner, for determining the actual channel.

[0112] The processor is further configured to execute the computer program to perform:

[0113] receiving the data signal transmitted by the asynchronous overlapping manner.

[0114] The processor is further configured to execute the computer program to perform:

[0115] receiving the combination of the length L of the data to be transmitted, the base station overlapping transmission factor K and the filter roll-off factor a, for determining the equivalent channel of the virtual antenna system.

[0116] It should be noted that the apparatus provided in the above embodiments is only used for example to divide the above program modules when transmitting information, and in actual application, the above processing can be completed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules to complete all or part of the above processing. In addition, the apparatus provided in the above embodiments and the corresponding method embodiments belong to the same concept, and the specific implementation process is shown in the method embodiments, which will not be repeated here.

[0117] In the example embodiments, the embodiments of the present application also provide a computer readable storage medium, which can be FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disc, or CD-ROM memory, etc. It can also be various devices including one or any combination of the above memories, such as mobile phones, computers, tablet devices, personal digital assistants, etc.

[0118] The embodiments of the present application also provide a computer readable storage medium having a computer program stored thereon, and the computer program is executed by a processor to perform:

[0119] at least transmitting the combination of the length L of the data to be transmitted, the base station overlapping transmission factor K and the filter roll-off factor a, for determining the equivalent channel of the virtual antenna system.

[0120] When the computer program is executed by the processor, the computer program further causes the processor to perform the following operations:

[0121] The combination information of the length L of the data to be transmitted, the base station overlapping transmission factor K and the filter roll-off factor a is transmitted through broadcasting, a radio resource control protocol (RRC) message or downlink control information (DCI).

[0122] When the computer program is executed by the processor, the computer program further causes the processor to perform the following operations:

[0123] The reference signal is transmitted in a synchronous non-overlapping manner, and is used to determine an actual channel.

[0124] When the computer program is executed by the processor, the computer program further causes the processor to perform the following operations:

[0125] The data signal is transmitted in an asynchronous overlapping manner.

[0126] When the computer program is executed by the processor, the computer program further causes the processor to perform the following operations:

[0127] The combination information of the length L of the data to be transmitted, the base station overlapping transmission factor K and the filter roll-off factor a is transmitted.

[0128] The computer readable storage medium stores a computer program, and when the computer program is executed by the processor, the computer program further causes the processor to perform the following operations:

[0129] The combination information of the length L of the data to be transmitted, the base station overlapping transmission factor K and the filter roll-off factor a is received.

[0130] Based on the combination information of the length L of the data to be transmitted, the base station overlapping transmission factor K and the filter roll-off factor a, an equivalent channel of a virtual antenna system is determined.

[0131] When the combination information of the length L of the data to be transmitted, the base station overlapping transmission factor K and the filter roll-off factor a is received, the computer program further causes the processor to perform the following operations:

[0132] The combination information of the length L of the data to be transmitted, the base station overlapping transmission factor K and the filter roll-off factor a is received through broadcasting, a radio resource control protocol (RRC) message or downlink control information (DCI).

[0133] When the equivalent channel of the virtual antenna system is determined based on the combination information of the length L of the data to be transmitted, the base station overlapping transmission factor K and the filter roll-off factor a, the computer program further causes the processor to perform the following operations:

[0134] An actual channel H is determined based on the reference signal.

[0135] Based on the combined information of the data length L to be transmitted, the base station overlap transmission factor K, and the filter roll-off factor α, as well as the actual channel H, the equivalent channel of the virtual antenna system is determined for reporting channel state information (CSI) or for data demodulation.

[0136] When the computer program is run by the processor, it also executes:

[0137] It receives reference signals transmitted in a synchronous, non-overlapping manner to determine the actual channel.

[0138] When the computer program is run by the processor, it also executes:

[0139] Receive data signals sent via asynchronous overlap.

[0140] When the computer program is run by the processor, it also executes:

[0141] The combined information of the updated data length L, the base station overlap transmission factor K, and the filter roll-off factor α is received and used to determine the equivalent channel of the virtual antenna system.

[0142] The present invention will now be described in conjunction with specific scenario examples.

[0143] Currently, in LTE and 5G NR systems, MIMO systems, due to the absence of latency and oversampling processing, have a channel response that is only related to the physical environment and does not require consideration of overlapping transmission capabilities or oversampling capabilities. As shown in equation (1-1), traditional N... r ×N t The actual channel response of a MIMO system can be expressed as:

[0144]

[0145] Figure 6 A block diagram of a virtual antenna system, such as ​ As shown, for N r ×N t In a virtual antenna system, transmit and matched filters are introduced at both the transmitter and terminal. Due to the introduction of asynchronous processing and oversampling, inter-symbol interference exists, making the filter's impact non-negligible. From the terminal's perspective, the signal transmitted by the base station undergoes not only the actual channel response but also the responses of the transmit and matched filters. Therefore, its complete channel response includes not only the actual channel response H but also the effects of the transmit and matched filters. The transmit filter at the transmitter and the matched filter at the receiver are g with a roll-off factor of α. T (t), g R Given a filter with length S, the equivalent filter f(t) = ∫g(t). T(t')g R (t'+t)dt', any symbol s sent by the i-th transmit antenna i (l) (the duration of a single symbol is Ts), the coefficient matrix F of the equivalent filter passed by i Can be expressed as:

[0146]

[0147] Consider all N t Transmit antennas and L symbols on each antenna, the signal received by the j-th receive antenna can be expressed as:

[0148]

[0149] Wherein,

[0150]

[0151] The equivalent channel observed by the j-th receive antenna is the Kronecker product of the actual channel and the correlation coefficient of the filter, so the overall channel response H asyn Can be calculated by the following formula:

[0152]

[0153] In the virtual antenna system, since the transmitter is asynchronous and the terminal is oversampled, the terminal needs to obtain the correlation information of the filter to accurately estimate the channel. As shown in equation (1-5), the actual physical channel, filter coefficient, number of transceiver antennas, data length L (number of symbols) to be transmitted, terminal oversampling capability G, filter g T (t) type, etc. Therefore, the necessary condition for the terminal to determine the complete channel response is to obtain Information.

[0154] Based on this, an embodiment of the present application proposes a communication scheme for a virtual antenna system. The base station needs to at least configure the following information for the UE: data length L to be transmitted, base station overlap sending factor K, and filter roll-off factor α. Since the above information is the necessary condition for establishing the channel response of the virtual antenna system, the embodiment proposes that the base station notifies the combination information of L, K and α through broadcasting, RRC message or DCI signaling, and L, K and α can be dynamically updated.

[0155] In the transmission phase of the reference signal, the embodiment proposes to use the traditional non-overlapping synchronization method for transmission, and to obtain the equivalent channel H asynIt should be noted that, since the asynchronous overlapping transmission mode itself is at the cost of introducing certain interference, in order to ensure the accuracy of the subsequent terminal reporting information and demodulation data, the base station in this embodiment adopts the traditional non-overlapping synchronization mode to transmit the reference signal in this stage, so as to ensure that the terminal can accurately estimate the channel information. Based on L, K, the terminal's oversampling factor G, and the actual channel H estimated according to the reference signal, the terminal determines the channel H of the virtual antenna system, and then reports more accurate channel state information (CSI) or demodulation data. asyn

[0156] When transmitting data on the data channel, the base station in this embodiment adopts the asynchronous overlapping mode to transmit data, so as to improve the multiplexing performance of the system. Specifically, the base station refers to the CSI information reported by the terminal to determine the number of streams M (M≤K) that should be allocated to the current terminal, and notifies the terminal of the current allocated stream number through RRC message or DCI signaling. Then, the base station adopts the asynchronous overlapping mode to transmit data, and the terminal determines H according to H estimated by DMRS and performs data demodulation. asyn

[0157] The specific process can be described as follows:

[0158] Step 1: The base station notifies the length of the data stream to be transmitted L, the base station overlapping transmission factor K, and the filter roll-off factor a;

[0159] Here, L, K, and a need to be jointly notified, and the three can be updated according to the performance observed by the system for a period of time.

[0160] Step 2: The base station synchronously transmits the CSI-RS signal in a non-overlapping transmission mode;

[0161] Step 3: The terminal acquires the actual channel and determines the equivalent channel H asyn , and reports the CSI;

[0162] Specifically, this step can include:

[0163] 3.1, measure the actual channel H according to the CSI-RS;

[0164] 3.2, determine the equivalent channel H asyn according to formula (1-5);

[0165] 3.3, determine one of the CSI reporting information based on H asyn The determination method of the rank RI (or the number of transmission streams) can include:

[0166] Scheme 1: obtain RI asyn in the form of SVD decomposition, RI = RI asyn / L; ​​

[0167] Scheme two: in the way of capacity maximization, rank RI is obtained based on capacity maximization asyn , RI = RI asyn / L, and the rank information and / or PMI, CQI and the like information are reported as CSI.

[0168] Step four: the base station allocates M stream (M≤K) data for the current terminal based on the CSI information reported by the terminal, and informs the terminal of the current allocated stream number through RRC message or DCI;

[0169] Step five: the base station synchronously sends DMRS in the way of non-overlapping transmission;

[0170] Step six: the terminal acquires the actual channel and determines the equivalent channel H asyn .

[0171] Specifically, the step can include:

[0172] 6.1, the terminal measures the actual channel H according to DMRS;

[0173] 6.2, the terminal determines the equivalent channel H asyn according to formula (1-5).

[0174] Step seven: the base station asynchronously sends data signals in the way of M stream overlapping;

[0175] Step eight: the terminal demodulates data according to the equivalent channel H asyn determined in step six.

[0176] It can be seen that the terminal of the embodiment of the present application can more accurately estimate the channel information based on the to-be-transmitted data stream length L, the base station overlapping transmission factor K, the filter roll-off factor α and the reference signal and the like information informed by the base station, and then more accurately report the CSI or more accurately demodulate data.

[0177] The above description is only the preferred embodiment of the present application, and is not used to limit the protection scope of the present application.

Claims

1. A method of information transmission, characterized in that, The method is applied to a base station and comprises: At least sending combined information of a to-be-transmitted data length L, a base station overlapping transmission factor K and a filter roll-off factor a, for determining an equivalent channel of a virtual antenna system; wherein the equivalent channel of the virtual antenna system is used for reporting channel state information CSI or performing data demodulation; The sending of the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a comprises: The combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is sent through broadcasting, a radio resource control protocol RRC message or downlink control information DCI.

2. The method of claim 1, wherein, The method further comprises: A reference signal is sent in a synchronous non-overlapping manner, for determining an actual channel.

3. The method of claim 1, wherein, The method further comprises: A data signal is sent in an asynchronous overlapping manner.

4. The method of claim 1, wherein, The method further comprises: The combined information of the updated to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is sent.

5. An information transmission method characterized by comprising: The method is applied to a terminal and comprises: Receiving combined information of a to-be-transmitted data length L, a base station overlapping transmission factor K and a filter roll-off factor a; Determining an equivalent channel of a virtual antenna system based on the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a; wherein the equivalent channel of the virtual antenna system is used for reporting channel state information CSI or performing data demodulation; The receiving of the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a comprises: The combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a is received through broadcasting, a radio resource control protocol RRC message or downlink control information DCI.

6. The method of claim 5, wherein, The determining of the equivalent channel of the virtual antenna system based on the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a comprises: Determining an actual channel H based on a reference signal; Determining the equivalent channel of the virtual antenna system based on the combined information of the to-be-transmitted data length L, the base station overlapping transmission factor K and the filter roll-off factor a and the actual channel H.

7. The method of claim 5, wherein, The method further comprises: Receiving a reference signal sent in a synchronous non-overlapping manner, for determining an actual channel.

8. The method of claim 5, wherein, The method further comprises: Receiving a data signal sent in an asynchronous overlapping manner.

9. The method of claim 5, wherein, The method further comprises: Receiving combined information of an updated to-be-transmitted data length L, a base station overlapping transmission factor K and a filter roll-off factor a, for determining an equivalent channel of a virtual antenna system.

10. An information transmission apparatus characterized by comprising: The device is applied to a base station and comprises: A first sending module, configured to send at least combined information of a to-be-transmitted data length L, a base station overlapping transmission factor K and a filter roll-off factor a, for determining an equivalent channel of a virtual antenna system; wherein the equivalent channel of the virtual antenna system is used for reporting channel state information CSI or performing data demodulation; The sending of the combined information of the data length L to be transmitted, the base station overlapping transmission factor K, and the filter roll-off factor a includes: sending the combined information of the data length L to be transmitted, the base station overlapping transmission factor K, and the filter roll-off factor a through broadcasting, a radio resource control protocol RRC message, or downlink control information DCI.

11. An information transmission apparatus characterized by comprising: The device is applied to a terminal and includes: The receiving module is configured to receive combined information of a data length L to be transmitted, a base station overlapping transmission factor K, and a filter roll-off factor a. The processing module is configured to determine an equivalent channel of a virtual antenna system based on the combined information of the data length L to be transmitted, the base station overlapping transmission factor K, and the filter roll-off factor a, wherein the equivalent channel of the virtual antenna system is used for reporting of channel state information CSI or data demodulation. The receiving of the combined information of the data length L to be transmitted, the base station overlapping transmission factor K, and the filter roll-off factor a includes: The receiving of the combined information of the data length L to be transmitted, the base station overlapping transmission factor K, and the filter roll-off factor a includes: receiving the combined information of the data length L to be transmitted, the base station overlapping transmission factor K, and the filter roll-off factor a through broadcasting, a radio resource control protocol RRC message, or downlink control information DCI.

12. An information transmission apparatus characterized by comprising: The device includes a processor and a memory for storing a computer program capable of running on the processor, The processor is configured to execute the steps of the method in any one of claims 1-4 or the steps of the method in any one of claims 5-9 when the computer program is run.

13. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1-4 or the steps of the method in any one of claims 5-9.

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