Reference signal measurement method and transmission / reception point (TRP) selection method

Abstract

Provided in the embodiments of the present disclosure are a reference signal measurement method and a transmission / reception point (TRP) selection method. The reference signal measurement method comprises: by means of multiple instances of time-domain sampling, measuring multiple reference signals of multiple candidate TRPs to obtain measurement results for the multiple reference signals, wherein the measurement results are used for determining, from among the multiple candidate TRPs, a target TRP combination that provides services for a user equipment.

Description

Measurement method of reference signal and selection method of transmission reception point (TRP)

[0001] Cross-reference to Related Applications

[0002] The present disclosure is based on Chinese Patent Application No. CN202410968403.9 entitled "Measurement method of reference signal and selection method of transmission reception point (TRP)" filed on July 18, 2024, and claims priority to the same, the disclosure of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the field of communications, and in particular, to a measurement method of reference signal and a selection method of transmission reception point (TRP). BACKGROUND

[0004] In a cell-free network, multiple transmission reception points (TRPs) can serve a user simultaneously. For coherent joint transmission, multiple base stations transmit the same data signal to the user, and the multiple data signals are coherently superimposed at the user end to be received by the user, which can significantly improve the coverage and edge user throughput. However, when multiple TRPs serve a user, the signals of the multiple TRPs can not be coherently superimposed due to user movement, synchronization error, or channel variation, etc., resulting in deep fading of the received signal of the user, i.e., the dramatic fluctuation of the signal strength caused by the superposition of multiple signals, and the amplitude of the received signal can decrease significantly.

[0005] In the fifth generation mobile communication technology, to improve the service quality of network coverage edge users, multiple transmission points have also been supported to serve a single user simultaneously, i.e., multi-TRP (mTRP) technology. In the mTRP technology, multiple TRPs need to be selected to serve the user. The current solution is to select the transmission point according to the received signal strength. However, when coherent transmission is performed, even if the user moves slowly, the received signal strength can change rapidly. Therefore, the current TRP selection solution cannot improve the problem of deep fading of the received signal of the user.

[0006] There is no good solution to the above problem in the related art. SUMMARY

[0007] Embodiments of the present disclosure provide a measurement method of reference signal and a selection method of transmission reception point (TRP) to at least solve the technical problem that the TRP selection solution in the related art cannot improve the deep fading of the received signal of the user.

[0008] According to one embodiment of the present disclosure, a reference signal measurement method is provided, which comprises: measuring a plurality of reference signals of a plurality of candidate transmission and reception points (TRPs) through a plurality of time domain samplings to obtain measurement results of the plurality of reference signals, wherein the measurement results are used to determine a target TRP combination providing services for a user equipment from the plurality of candidate TRPs.

[0009] According to another embodiment of the present disclosure, a transmission and reception point (TRP) selection method is provided, which comprises: obtaining measurement results of a plurality of reference signals sent by a user equipment, wherein the measurement results are obtained by the user equipment through a plurality of time domain samplings on a plurality of reference signals of a plurality of candidate TRPs; and determining a target TRP combination providing services for the user equipment from the plurality of candidate TRPs according to the measurement results.

[0010] According to another embodiment of the present disclosure, a computer readable storage medium is also provided, which stores a computer program, wherein the computer program is run by a processor to perform the steps in any of the above method embodiments.

[0011] According to another embodiment of the present disclosure, an electronic device is also provided, which comprises a memory storing a computer program and a processor configured to run the computer program to perform the steps in any of the above method embodiments.

[0012] According to another embodiment of the present disclosure, a computer program product is also provided, which comprises a computer program run by a processor to perform the steps in any of the above method embodiments.

[0013] Through the embodiments of the present application, the reference signals of a plurality of nodes are measured in combination and a plurality of samplings, the sampling results of a plurality of time domains are integrated to select an optimal node combination, and thus the overall signal quality can be improved, and the technical problem that the TRP selection scheme in the related art cannot improve the deep fading of the received signal of a user can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0014] FIG. 1 is a hardware structure block diagram of a mobile terminal of a reference signal measurement method according to an embodiment of the present disclosure;

[0015] FIG. 2 is a flowchart of a reference signal measurement method according to an embodiment of the present disclosure;

[0016] FIG. 3 is a flowchart of a transmission and reception point (TRP) selection method according to an embodiment of the present disclosure;

[0017] FIG. 4 is a whole flowchart of a TRP selection method according to an embodiment of the present disclosure;

[0018] FIG. 5 is a schematic diagram of time-frequency resources occupied by reference signals of multiple TRPs (I) according to an embodiment of the present disclosure;

[0019] FIG. 6 is a schematic diagram of time-frequency resources occupied by reference signals of multiple TRPs (II) according to an embodiment of the present disclosure;

[0020] FIG. 7 is a schematic diagram of reference signals transmitted according to a preset period according to an embodiment of the present disclosure;

[0021] FIG. 8 is a schematic diagram of continuous transmission of reference signals according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0022] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings and in conjunction with embodiments.

[0023] It should be noted that the terms "first", "second", and the like in the description and claims of the present disclosure and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence.

[0024] The method embodiments provided in the embodiments of the present disclosure can be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking the case of running on a computer terminal, FIG. 1 is a hardware structure block diagram of a mobile terminal of a reference signal measurement method according to an embodiment of the present disclosure, as shown in FIG. 1, the hardware single board can include one or more (only one is shown in FIG. 1) processors 12 (the processor 12 can include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 14 for storing data, wherein the above-mentioned computer terminal can further include a transmission device 16 for communication function and an input and output device 18. Those skilled in the art can understand that the structure shown in FIG. 1 is only schematic, which does not limit the structure of the above-mentioned computer terminal. For example, the computer terminal can further include more or fewer components than those shown in FIG. 1, or have a different configuration from that shown in FIG. 1.

[0025] The memory 14 can be used to store computer programs, for example, software programs of application software and modules, such as the computer program corresponding to the reference signal measurement method in the embodiments of the present disclosure, and the processor 12 executes various functions and the reference signal measurement method by running the computer program stored in the memory 14, that is, implements the above-mentioned method. The memory 14 can include a high-speed random access memory, and can also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some examples, the memory 14 can further include a memory remotely arranged with respect to the processor 12, which can be connected to the computer terminal through a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0026] The transmission device 16 is configured to receive or send data via a network. The network can include a wireless network provided by a communication provider. In one example, the transmission device 16 includes a network interface controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet. In one example, the transmission device 16 can be a radio frequency (RF) module configured to communicate with the Internet wirelessly.

[0027] The embodiments of the present disclosure can be implemented in a cell-free network, which includes a base station, a transmission / reception point (TRP), and a user equipment. The base station can coordinate communications between multiple TRPs, and the TRPs can provide services for the user equipment. The base station can also be replaced by a master TRP in the multiple TRPs.

[0028] In the embodiments, a reference signal measurement method is provided, which can be implemented in the mobile terminal or other user equipment. FIG. 2 is a flowchart of the reference signal measurement method according to the embodiments of the present disclosure. As shown in FIG. 2, the method includes the following steps:

[0029] In step S202, multiple reference signals of multiple candidate TRPs are measured through multiple time domain samplings, and measurement results of the multiple reference signals are obtained. The measurement results are used to determine a target TRP combination for providing services for the user equipment from the multiple candidate TRPs.

[0030] In the embodiments of the present disclosure, the reference signals of multiple nodes can be measured through the above steps, and the measurement results of multiple time domains are combined to select an optimal node combination, so that the overall signal quality can be improved, and the technical problem that the TRP selection scheme in the related art cannot improve the deep fading of the received signal of the user equipment can be solved.

[0031] The execution subject of the above steps can be a user equipment in a cell-free network, such as a mobile terminal, a computer terminal, and the like, but the present disclosure is not limited thereto.

[0032] In an example embodiment, the reference signal can be a channel state information-reference signal (CSI-RS), a demodulation reference signal (DMRS), or other forms of reference signals, and the present disclosure is not limited thereto.

[0033] In some embodiments, the measurement result comprises at least one of: a Reference Signal Received Power (RSRP); a Received Signal Strength Indicator (RSSI); a received signal amplitude; a received signal phase; and a symbol information of a received signal.

[0034] In an example embodiment, the symbol information of the received signal can be represented as: i,m = h i,m s i,m = αe jθ ;

[0035] where x i,m is a symbol information (a detection result) of a received signal of the mth TRP in the ith time domain sampling period, s i,m is a reference signal sent by the mth TRP in the ith reference signal sending period, h i,m represents a channel between the user equipment and the mth TRP in the ith reference signal sending period, α is a received signal amplitude, and e jθ is a received signal phase.

[0036] In some embodiments, before step S202, the method further comprises: a step S200 of receiving downlink signaling sent by a base station, wherein the downlink signaling carries resource configuration information of the plurality of reference signals, and the resource configuration information is used to instruct the user equipment to receive the plurality of reference signals.

[0037] In an example embodiment, the downlink signaling comprises a broadcast message, such as a Physical Broadcast Channel / Synchronization signal Block (SS / PBCH Block), Downlink Control Information (DCI), Radio Resource Control (RRC) signaling, and a Medium Access Control Control Element (MAC CE).

[0038] In some embodiments, the resource configuration information comprises at least one of: time domain information, frequency domain information, and code domain information.

[0039] In some embodiments, time domain resources and / or frequency domain resources of the plurality of reference signals are the same.

[0040] In an example embodiment, the multiple reference signals can occupy the same time-frequency resource, or the multiple reference signals can be divided into multiple groups, and each group of reference signals occupies the same time-frequency resource. The multiple reference signals corresponding to the same time-frequency resource can be transmitted in a code division multiple access (CDMA) manner, that is, the multiple reference signal sequences are orthogonal to each other.

[0041] In an example embodiment, the different reference signals or different groups of reference signals can be distinguished by time domain resources or frequency domain resources, thereby ensuring that the user equipment can detect and distinguish the multiple reference signals.

[0042] In some embodiments, the multiple reference signals in step S202 are transmitted by the multiple candidate TRPs according to a preset period; or the multiple reference signals are continuously transmitted in the time domain by the multiple candidate TRPs. The continuous transmission or multiple transmission of the reference signals enables the user equipment to perform multiple time domain sampling on each reference signal, avoids large fluctuations in the detection results in a short period of time, and improves the accuracy of the detection results.

[0043] In some embodiments, step S202 can include: performing multiple time domain samplings on each of the multiple reference signals according to a preset period and a preset resource configuration, to obtain multiple measurement results of each reference signal in multiple time domain sampling periods, wherein each measurement result corresponds to a time domain sampling period and a reference signal.

[0044] In an example embodiment, assuming that there are M candidate TRPs, the user equipment can obtain measurement results of the M reference signals after receiving the reference signals transmitted by the M candidate TRPs. Assuming that the measurement result of the jth reference signal in the ith time domain sampling period is x i,j , where 1≤i≤T, 1≤j≤M, T is the number of transmission times of the reference signal (i.e., the total number of periods), and M is the number of reference signals of different TRPs that can be received in a period. Then, for the ith reference signal transmission period, the user can obtain x i,1 , x i,2 ,..., x i,M , a total of M measurement results.

[0045] In some embodiments, the method can further include the following steps:

[0046] Step S204: combining the multiple candidate TRPs to obtain multiple candidate TRP combinations, wherein each candidate TRP combination includes a preset number of candidate TRPs.

[0047] Step S206, performing operation on the measurement results of the reference signals corresponding to all candidate TRPs in each candidate TRP combination according to a preset operation mode, to obtain an operation result of each candidate TRP combination, wherein the operation result of the candidate TRP combination is used to determine the target TRP combination from the plurality of candidate TRP combinations.

[0048] In the embodiment, the plurality of candidate TRP combinations are all possible TRP combinations determined by permutation and combination. For example, if the total number of candidate TRPs is M, the preset number (i.e., the number of target TRPs) is K, that is, K target TRPs are selected from M candidate TRPs, at this time, the number of candidate TRP combinations is , wherein represents the number of combinations of taking K elements from M elements, and K is less than or equal to M.

[0049] In some embodiments, the preset number can include a plurality of values, or the preset number can be set to be empty, then all possible candidate TRP combinations can be traversed, and the number of candidate TRPs included in a single candidate TRP combination can be set to traverse from 1 to M. For example, assuming that there are M candidate TRPs, at least one target TRP is selected to serve the user, then there are candidate TRP combinations, and an operation result can be calculated for each candidate TRP combination.

[0050] In the embodiment, step S206 is used to select an optimal result from all candidate TRP combinations, and based on the difference in the measurement mode of the optimal result, the operation mode also has certain differences.

[0051] In some embodiments, the preset operation mode and the preset number are notified by the base station to the user equipment through downlink signaling.

[0052] In some embodiments, step S206 can include the following steps:

[0053] Step S2062, performing operation on the measurement results of the reference signals corresponding to all candidate TRPs in each candidate TRP combination according to a preset first operation mode, to obtain a plurality of first operation results, wherein each first operation result corresponds to a candidate TRP combination and a time domain sampling period;

[0054] Step S2064, performing operation on the first operation results of each candidate TRP combination in all time domain sampling periods according to a preset second operation mode, to obtain an operation result of each candidate TRP combination.

[0055] In some embodiments, step S2062 comprises at least one of the following:

[0056] For each time-domain sampling period, determining a sum of measurement results of all reference signals corresponding to each of the candidate TRP combinations;

[0057] For each time-domain sampling period, determining a mean value of measurement results of all reference signals corresponding to each of the candidate TRP combinations;

[0058] For each time-domain sampling period, determining a modulus value of a sum of measurement results of all reference signals corresponding to each of the candidate TRP combinations;

[0059] For each time-domain sampling period, determining a mean value of a modulus value of a sum of measurement results of all reference signals corresponding to each of the candidate TRP combinations;

[0060] For each time-domain sampling period, determining a sum of modulus values of measurement results of all reference signals corresponding to each of the candidate TRP combinations;

[0061] For each time-domain sampling period, determining a mean value of modulus values of measurement results of all reference signals corresponding to each of the candidate TRP combinations.

[0062] In an exemplary embodiment, the first operation result is a sum of measurement results, assuming that the TRP serial numbers contained in the jth candidate TRP combination are represented by set A j The first operation result y i,j of the jth candidate TRP combination in the ith time-domain sampling period can be represented as:

[0063] In some embodiments, step S2064 comprises at least one of the following:

[0064] Determining a sum of modulus values of first operation results of all time-domain sampling periods for each of the candidate TRP combinations;

[0065] Determining a mean value of modulus values of first operation results of all time-domain sampling periods for each of the candidate TRP combinations;

[0066] Determining a sum of first operation results of all time-domain sampling periods for each of the candidate TRP combinations;

[0067] Determining a mean value of first operation results of all time-domain sampling periods for each of the candidate TRP combinations;

[0068] Determining a variance of first operation results / first operation result modulus values of all time-domain sampling periods for each of the candidate TRP combinations;

[0069] determining a standard deviation of the first operation result / the modulus of the first operation result of each of the candidate TRP combinations over all time domain sampling periods;

[0070] determining a range of the first operation result / the modulus of the first operation result of each of the candidate TRP combinations over all time domain sampling periods.

[0071] In an exemplary embodiment, assuming the user equipment measures T time domain sampling periods, the second operation result y j may be represented as at least one of:

[0072] a sum of the modulus of the plurality of first operation results:

[0073] an average of the modulus of the plurality of first operation results:

[0074] a sum of the plurality of first operation results:

[0075] an average of the plurality of first operation results:

[0076] wherein y i,j is the first operation result of the jth candidate TRP combination at the ith time domain sampling period.

[0077] In an exemplary embodiment, to ensure the robustness of the selected TRP combination for data transmission, the operation result can also be a measure of the stability of the measurement results over multiple periods.

[0078] In an exemplary embodiment, assuming the user equipment measures T time domain sampling periods, the second operation result y j may also be represented as at least one of:

[0079] a variance of the plurality of first operation results:

[0080] a range of the plurality of first operation results: y j = y max,j - y min,j ;

[0081] a standard deviation of the plurality of first operation results:

[0082] wherein, denotes an average of the modulus of the first operation result of the jth candidate TRP combination over multiple time domain sampling periods, y max,j = max i |yi,j | represents the maximum value of the modulus of the first operation result of the plurality of time domain sampling periods of the jth candidate TRP group, y min,j = min i |y i,j | represents the minimum value of the modulus of the first operation result of the plurality of time domain sampling periods of the jth candidate TRP group.

[0083] In this embodiment, the correspondence between the reference signal and the candidate TRP can be transparent or non-transparent to the user equipment side. If the user equipment does not perceive the correspondence between the two, the user equipment can report the combination of the measurement result, the operation result or the selected reference signal to the base station. If the user equipment can perceive the correspondence between the two, the user equipment can directly select the target TRP combination and report it to the base station.

[0084] In some embodiments, the method further comprises: step S208A, determining the target TRP combination according to the operation results of the plurality of candidate TRP combinations, and reporting the target TRP combination to the base station.

[0085] In this embodiment, the user equipment can select the target TRP combination according to the operation result and report it. For example, when the operation result is the mean value, the user side can select the candidate TRP combination with the maximum mean value as the target TRP combination and report it. When the operation result is the variance, the user side can select the candidate TRP combination with the minimum variance as the target TRP combination and report it.

[0086] In some embodiments, the user side can also select the optimal TRP combination according to a plurality of operation results. For example, the mean value and the variance can be used to select the optimal TRP combination. The selection method and the selection condition can be set according to the user demand, which is not limited herein.

[0087] In some embodiments, the method further comprises: step S208B, reporting the operation results of the plurality of candidate TRP combinations to the base station, so that the base station determines the target TRP combination from the plurality of candidate TRPs according to the operation results of the plurality of candidate TRP combinations.

[0088] In this embodiment, the user side can only report the operation result. For example, the base station can instruct the user side to report the optimal L operation results through signaling. The operation result can be any one of the above embodiments or a combination of any several items. For example, the user side can report the mean value of the first L candidate TRP combinations with the maximum mean value and the variance thereof according to the instruction of the base station. However, the disclosure is not limited to this. The reporting method and the reporting content of the user equipment can be flexibly configured by the base station through signaling.

[0089] In some embodiments, the method further comprises: a step S208C, directly reporting the measurement result to the base station, and then determining the target TRP combination according to the measurement result by the base station.

[0090] In some embodiments, the candidate TRP combination described above can be identified by the sequence number of the reference signal, that is, the user side does not need to pay attention to the correspondence between the TRP and the reference signal, but only needs to determine the detection result of each reference signal, the calculation result of each reference signal combination or the best reference signal combination. Then, the base station side determines the best TRP combination according to the correspondence between the reference signal and the TRP.

[0091] In the embodiments of the present disclosure, the reference signals of multiple nodes can be measured and sampled multiple times, and the optimal node combination can be selected by integrating the sampling results of multiple time domains, thereby improving the overall signal quality and solving the technical problem that the TRP selection scheme in the related art cannot improve the deep fading of the received signal of the user.

[0092] In an exemplary embodiment, the user only reports the calculation result. For example, the base station instructs the user to report the optimal L calculation results through signaling, and the calculation result can be any of the above or a combination of any of them, for example, the user can report the mean value of the first L TRP combination with the largest mean value and its variance according to the instruction of the base station.

[0093] In the present embodiment, a transmission and reception node TRP selection method is provided, which can be used in a 6G architecture (such as a cell-free network) to manage a base station or a master TRP for controlling multiple TRPs. FIG. 3 is a flowchart of a transmission and reception node TRP selection method according to an embodiment of the present disclosure. As shown in FIG. 3, the flow includes the following steps:

[0094] In step S302, the measurement result of the multiple reference signals sent by the user equipment is obtained, wherein the measurement result is obtained by measuring the multiple reference signals of multiple candidate transmission and reception nodes TRPs by the user equipment through multiple time domain samplings.

[0095] In step S304, the target TRP combination for providing services to the user equipment is determined from the multiple candidate TRPs according to the measurement result.

[0096] In the embodiments of the present disclosure, through the above steps S302 to S304, the reference signals of multiple nodes can be measured and sampled multiple times at the user side, and the optimal node combination can be selected by integrating the sampling results of multiple time domains at the base station side, thereby improving the overall signal quality and solving the technical problem that the TRP selection scheme in the related art cannot improve the deep fading of the received signal of the user.

[0097] In some embodiments, the measurement result comprises at least one of: a reference signal received power (RSRP); a received signal strength indication (RSSI); a received signal amplitude; a received signal phase; and a symbol information of a received signal.

[0098] In an example embodiment, the symbol information of the received signal can be expressed as: i,m = h i,m s i,m = a e jθ ;

[0099] where x i,m is the symbol information (detection result) of the received signal of the mthTRP in the ithtime domain sampling period, s i,m is a reference signal transmitted by the mthTRP in the ithreference signal transmission period, h i,m represents a channel between the user equipment and the mthTRP in the ithreference signal transmission period, a is a received signal amplitude, and e jθ is a received signal phase. The symbol information can also be written in the form of a sequence to represent the symbol information of the reference signal in a period of time.

[0100] In some embodiments, the method further comprises: step S300, transmitting downlink signaling to the user equipment and the plurality of candidate TRPs, wherein the downlink signaling carries resource configuration information of the plurality of reference signals.

[0101] In this embodiment, the base station can control the communication resources of the reference signals transmitted by each candidate TRP through downlink signaling, thereby ensuring that the user equipment can detect the reference signals of the plurality of TRPs and enabling the user equipment to perform combined measurement on the reference signals of the plurality of TRPs.

[0102] In an example embodiment, the downlink signaling comprises a broadcast message such as SS / PBCH, DCI, RRC signaling, and MAC CE.

[0103] In some embodiments, the resource configuration information comprises at least one of: time domain information, frequency domain information, and code domain information.

[0104] In some embodiments, the time domain resources and / or frequency domain resources of the plurality of reference signals are the same.

[0105] In an example embodiment, the plurality of reference signals can occupy the same time-frequency resources, or the plurality of reference signals can be divided into multiple groups, and each group of reference signals occupies the same time-frequency resources. The plurality of reference signals corresponding to the same time-frequency resources can be transmitted in a code division multiple access (CDMA) manner, i.e., the plurality of reference signal sequences are orthogonal to each other.

[0106] In an example embodiment, the different reference signals or different groups of reference signals can be distinguished by time domain resources and frequency domain resources, thereby ensuring that the user equipment can detect and distinguish multiple reference signals.

[0107] In some embodiments, step S304 can include the following steps:

[0108] Step S3042, combining the plurality of candidate TRPs to obtain a plurality of candidate TRP combinations, wherein each candidate TRP combination contains a preset number of candidate TRPs;

[0109] Step S3044, according to a preset operation mode, operating the measurement results of the reference signals corresponding to all candidate TRPs in each candidate TRP combination to obtain an operation result of each candidate TRP combination;

[0110] Step S3046, determining the target TRP combination from the plurality of candidate TRP combinations according to the operation results of the candidate TRP combinations.

[0111] In some embodiments, steps S3042 and S3044 described above can also be implemented on the user side device, and the base station directly obtains the operation results of each subsequent TRP combination reported by the user equipment and performs step S3046.

[0112] In some embodiments, steps S3042 to S3046 described above can also be implemented on the user equipment, and the base station can directly obtain the target TRP combination processed according to the above steps from the user equipment.

[0113] In some embodiments, step S3044 described above can include the following steps:

[0114] Step S3044-2, according to a preset first operation mode, operating the measurement results of the reference signals corresponding to all candidate TRPs in each candidate TRP combination in each time domain sampling period to obtain a plurality of first operation results, wherein each first operation result corresponds to a candidate TRP combination and a time domain sampling period;

[0115] Step S3044-4, according to a preset second operation mode, operating the first operation results of each candidate TRP combination in all time domain sampling periods to obtain an operation result of each candidate TRP combination.

[0116] In some embodiments, step S3044-2 can include at least one of the following:

[0117] For each time domain sampling period, determine the superposition result of the measurement results of all reference signals corresponding to each candidate TRP combination;

[0118] For each time domain sampling period, determine the average value of the measurement results of all reference signals corresponding to each of the candidate TRP combinations;

[0119] For each time domain sampling period, determine the modulus value of the superposition result of the measurement results of all reference signals corresponding to each of the candidate TRP combinations;

[0120] For each time domain sampling period, determine the average value of the modulus value of the superposition result of the measurement results of all reference signals corresponding to each of the candidate TRP combinations;

[0121] For each time domain sampling period, determine the superposition result of the modulus value of the measurement results of all reference signals corresponding to each of the candidate TRP combinations;

[0122] For each time domain sampling period, determine the average value of the modulus value of the measurement results of all reference signals corresponding to each of the candidate TRP combinations.

[0123] In some embodiments, step S3044-4 can include at least one of the following:

[0124] Determine the superposition result of the modulus value of the first operation result of each of the candidate TRP combinations in all time domain sampling periods;

[0125] Determine the average value of the modulus value of the first operation result of each of the candidate TRP combinations in all time domain sampling periods;

[0126] Determine the superposition result of the first operation result of each of the candidate TRP combinations in all time domain sampling periods;

[0127] Determine the average value of the first operation result of each of the candidate TRP combinations in all time domain sampling periods;

[0128] Determine the variance of the first operation result / first operation result modulus value of each of the candidate TRP combinations in all time domain sampling periods;

[0129] Determine the standard deviation of the first operation result / first operation result modulus value of each of the candidate TRP combinations in all time domain sampling periods;

[0130] Determine the range of the first operation result / first operation result modulus value of each of the candidate TRP combinations in all time domain sampling periods.

[0131] In the embodiments of the present disclosure, the reference signals of multiple TRPs can be measured and sampled multiple times, and the sampling results of multiple time domains are integrated to select the optimal TRP combination, thereby improving the overall signal quality and solving the technical problem that the TRP selection scheme in the related art cannot improve the deep fading of the received signal of the user.

[0132] The various embodiments in the present disclosure can be applied to a 6G network architecture, the network architecture of which includes a base station, a TRP and a user equipment, the base station can dynamically select one or more TRPs to provide services for each user equipment.

[0133] FIG. 4 is a whole flow chart of a TRP selection method according to an embodiment of the present disclosure, as shown in FIG. 4, the flow includes the following steps:

[0134] Step S402, multiple candidate TRPs send downlink reference signals to a user equipment;

[0135] Step S404, the user equipment measures each reference signal;

[0136] Step S406, the user equipment reports the result to the base station.

[0137] In the present embodiment, the reporting of the result in step S406 can include at least one of the following: a measurement result, an operation result of combining the measurement result, a reference signal combination selected according to the operation result, a TRP combination.

[0138] In some embodiments, assuming there are M candidate TRPs, the M candidate TRPs will send downlink reference signals to the user equipment at the same time (or within the same time domain sampling period), and the user equipment detects M downlink reference signals in total.

[0139] In some embodiments, the downlink reference signal sent by each TRP carries different sequence information, such as its own identity identifier, different orthogonal codes, etc., even if the M reference signals are received by the user at the same time, the user can also detect the measurement result of each of the M reference signals, and can correspond the measurement result with the reference signal. Therefore, the user equipment can clearly know the correspondence between each reference signal and each measurement result.

[0140] In some embodiments, the correspondence between the M reference signals and the M TRPs is transparent to the user, and the user equipment only needs to obtain the measurement result corresponding to the M reference signals, without obtaining the correspondence between the reference signal and the TRP.

[0141] FIG. 5 is a schematic diagram of time-frequency resources occupied by reference signals of multiple TRPs in an embodiment of the present disclosure, as shown in FIG. 5, multiple reference signals can occupy the same or different time-frequency resources.

[0142] In the embodiment, the M reference signals transmitted by the M TRPs can occupy the same time-frequency resources. Since the reference signals transmitted by each TRP occupy the same time-frequency resources, to ensure that the user equipment can detect all the reference signals, the M reference signals are transmitted in a code division multiple access (CDMA) manner, that is, the reference signal sequences transmitted by different TRPs are orthogonal to each other, and the orthogonal sequences are used to help the user equipment to perform receiving detection.

[0143] In an example embodiment, as shown in FIG. 5a, assuming that M = 8 and the 8 reference signals occupy the same time-frequency resources, 8 orthogonal sequences, that is, CDM8, are required, and each sequence needs to be carried by 8 resource elements (REs), and each RE carries an element in the orthogonal sequence.

[0144] In an example embodiment, the orthogonal sequences carried by the 8 resource elements are shown in Table 1.

[0145] Table 1:

[0146] In another example embodiment, the orthogonal sequences carried by the 8 resource elements can also be the result of multiplication of two orthogonal sequences, as shown in Table 2.

[0147] Table 2:

[0148] Only two implementation manners of the orthogonal sequences are given in the disclosure, but the disclosure does not limit the sequences used by the respective reference signals, as long as the user can simultaneously detect the reference signals transmitted by different TRPs.

[0149] In some embodiments, only part of the reference signals transmitted by the M TRPs occupy the same time-frequency resources.

[0150] In an example embodiment, as shown in FIGS. 5b and 5c, assuming that there are 8 TRPs and 8 reference signals are to be transmitted, FIG. 5b divides the reference signals into 2 groups, each group has 4 reference signals occupying the same time-frequency resources, and the reference signals occupying the same time-frequency resources are distinguished in a code division multiple access manner, each group of reference signals uses 4 orthogonal codes, referred to as CDM4. FIG. 5c divides the reference signals into 4 groups, and each group of reference signals uses 2 orthogonal codes, that is, CDM2.

[0151] In an example embodiment, among the reference signals transmitted by the M TRPs, all the reference signals can occupy different time-frequency resources, as shown in FIG. 5d, and the user can distinguish the reference signals transmitted by different TRPs according to the time-frequency resources.

[0152] FIG. 6 is a schematic diagram of time-frequency resources occupied by reference signals of multiple TRPs in an embodiment of the present disclosure, as shown in FIG. 6, the time-domain resources occupied by the multiple reference signals are different, and the frequency-domain resources are the same.

[0153] In the present embodiment, the transmission mode of the reference signals of the M TRPs can be time-domain code division. The multiple reference signals only occupy one subcarrier in the frequency domain, and time-domain width is used for code division multiple access.

[0154] In the embodiments of the present disclosure, in order to enhance the robustness of TRP selection, the above-mentioned reference signals can be continuously transmitted or periodically transmitted in multiple time-domain periods.

[0155] FIG. 7 is a schematic diagram of the transmission of reference signals according to a preset period in an embodiment of the present disclosure, as shown in FIG. 7, the reference signals of the multiple TRPs can be transmitted multiple times according to a preset time-domain period, and in each period, the multiple TRPs can transmit the reference signals according to the time-frequency resources in the above-mentioned embodiments.

[0156] In the present embodiment, the transmission period of the reference signals on the TRP side can be N symbols, slots, subframes, frames, etc., and the present disclosure does not limit this. The time-domain sampling period on the user equipment side is the same as the transmission period, and can also be N symbols, slots, subframes, frames, etc.

[0157] FIG. 8 is a schematic diagram of the continuous transmission of reference signals in an embodiment of the present disclosure, as shown in FIG. 8, the reference signals of the multiple TRPs can be continuously transmitted in the time domain.

[0158] In the present embodiment, the multiple TRPs can continuously transmit the downlink reference signals in a preset period of time, and the user performs multiple time-domain samplings and obtains multiple measurement results.

[0159] In the embodiments of the present disclosure, the time-frequency resources, orthogonal sequences, and transmission / sampling periods occupied by the reference signals are all configured by the base station through uplink signaling. Exemplarily, the downlink signaling can include broadcast messages such as physical broadcast channels / synchronization signal blocks, downlink control information DCI, radio resource control RRC signaling, media access control elements MAC CEs, etc. The present disclosure does not limit the form of the reference signals, and exemplarily, the reference signals can include channel state information reference signals CSI-RS, demodulation reference signals, or other forms of reference signals.

[0160] Those skilled in the art can clearly understand that the method according to the above-mentioned embodiments can be realized by means of software on a general hardware platform, and of course can also be realized by hardware, but in many cases the former is a better implementation. Based on such understanding, the technical solutions of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, or an optical disk) and includes a plurality of instructions for causing a terminal device (which can be a mobile phone, a computer, a server, or a network device) to execute the methods described in the various embodiments of the present disclosure.

[0161] The embodiments of the present disclosure further provide a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to perform the steps in any of the method embodiments.

[0162] In an example embodiment, the computer readable storage medium can include, but is not limited to, a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store computer programs.

[0163] The embodiments of the present disclosure further provide an electronic device, which includes a memory and a processor, the memory stores a computer program, and the processor is configured to execute the computer program to perform the steps in any of the method embodiments.

[0164] In an example embodiment, the electronic device can further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0165] The embodiments of the present disclosure further provide a computer program product, which includes a computer program, and the computer program is executed by a processor to perform the steps in the methods described in the various embodiments of the present disclosure.

[0166] The specific examples in the present embodiment can refer to the examples described in the above embodiments and example implementations, and the present embodiment will not be described here again.

[0167] It is apparent that those skilled in the art should understand that the modules or steps of the present disclosure described above can be realized by general computing devices, which can be centralized on a single computing device or distributed on a network composed of multiple computing devices, and can be realized by program codes executable by the computing devices, so that they can be stored in storage devices and executed by the computing devices, and in some cases, the steps shown or described can be executed in different orders, or they can be respectively manufactured into individual integrated circuit modules, or multiple modules or steps among them can be manufactured into a single integrated circuit module. Thus, the present disclosure is not limited to any specific combination of hardware and software.

[0168] The above merely shows exemplary embodiments of the present disclosure and is not intended to limit the present disclosure. The present disclosure can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method for measuring reference signals, the method comprising: measuring a plurality of reference signals of a plurality of candidate transmission and reception points (TRPs) through a plurality of time domain samplings to obtain measurement results of the plurality of reference signals, wherein the measurement results are used to determine a target TRP combination from the plurality of candidate TRPs to serve a user equipment (UE).

2. The method of claim 1, wherein, The measurement results comprise at least one of: a reference signal received power (RSRP) ; a received signal strength indication (RSSI) ; a received signal amplitude (RSA) ; a received signal phase (RSP) ; a sign information of a received signal.

3. The method of claim 1, wherein, The method further comprises: receiving downlink signaling transmitted by a base station, wherein the downlink signaling carries resource configuration information of the plurality of reference signals, and the resource configuration information is used to instruct the UE to receive the plurality of reference signals.

4. The method of claim 3, wherein, The resource configuration information comprises at least one of time domain information, frequency domain information, and code domain information.

5. The method of claim 1, wherein, The time domain resources and / or frequency domain resources of the plurality of reference signals are the same. 6.The method of claim 1, wherein: the plurality of reference signals are transmitted by the plurality of candidate TRPs according to a preset period; or the plurality of reference signals are transmitted by the plurality of candidate TRPs continuously in time domain.

7. The method of claim 1, wherein, The measuring the plurality of reference signals of the plurality of candidate TRPs through a plurality of time domain samplings to obtain measurement results of the plurality of reference signals comprises: sampling each of the plurality of reference signals according to a preset period and a preset resource configuration to obtain a plurality of measurement results of each of the reference signals in a plurality of time domain sampling periods, wherein each of the measurement results corresponds to one of the time domain sampling periods and one of the reference signals.

8. The method of claim 1, wherein, The method further comprises: combining the plurality of candidate TRPs to obtain a plurality of candidate TRP combinations, wherein each of the candidate TRP combinations comprises a preset number of candidate TRPs; performing operations on the measurement results of the reference signals corresponding to all the candidate TRPs in each of the candidate TRP combinations according to a preset operation mode to obtain an operation result of each of the candidate TRP combinations, wherein the operation result of each of the candidate TRP combinations is used to determine the target TRP combination from the plurality of candidate TRP combinations.

9. The method of claim 8, wherein, The preset operation mode and the preset number are notified to the UE by the base station through downlink signaling.

10. The method of claim 8, wherein, The performing operations on the measurement results of the reference signals corresponding to all the candidate TRPs in each of the candidate TRP combinations according to a preset operation mode to obtain an operation result of each of the candidate TRP combinations comprises: performing operations on the measurement results of the reference signals corresponding to all the candidate TRPs in each of the candidate TRP combinations in each of the time domain sampling periods according to a preset first operation mode to obtain a plurality of first operation results, wherein each of the first operation results corresponds to one of the candidate TRP combinations and one of the time domain sampling periods; and performing operations on the first operation results of each of the candidate TRP combinations in all the time domain sampling periods according to a preset second operation mode to obtain the operation result of each of the candidate TRP combinations.

11. The method of claim 10, wherein, According to a preset first operation mode, the measurement results of the reference signals corresponding to all candidate TRP pairs in each candidate TRP combination are operated in each time domain sampling period to obtain a plurality of first operation results, including at least one of the following: For each time domain sampling period, the superposition result of the measurement results of all reference signals corresponding to each candidate TRP combination is determined; For each time domain sampling period, the average value of the measurement results of all reference signals corresponding to each candidate TRP combination is determined; For each time domain sampling period, the modulus value of the superposition result of the measurement results of all reference signals corresponding to each candidate TRP combination is determined; For each time domain sampling period, the average value of the modulus value of the superposition result of the measurement results of all reference signals corresponding to each candidate TRP combination is determined; For each time domain sampling period, the superposition result of the modulus value of the measurement results of all reference signals corresponding to each candidate TRP combination is determined; For each time domain sampling period, the average value of the modulus value of the measurement results of all reference signals corresponding to each candidate TRP combination is determined.

12. The method of claim 10, wherein, According to a preset second operation mode, the first operation results of each candidate TRP combination in all time domain sampling periods are operated to obtain the operation result of each candidate TRP combination, including at least one of the following: The superposition result of the modulus value of the first operation result of each candidate TRP combination in all time domain sampling periods is determined; The average value of the modulus value of the first operation result of each candidate TRP combination in all time domain sampling periods is determined; The superposition result of the first operation result of each candidate TRP combination in all time domain sampling periods is determined; The average value of the first operation result of each candidate TRP combination in all time domain sampling periods is determined; The variance of the first operation result / the modulus value of the first operation result of each candidate TRP combination in all time domain sampling periods is determined; The standard deviation of the first operation result / the modulus value of the first operation result of each candidate TRP combination in all time domain sampling periods is determined; The range of the first operation result / the modulus value of the first operation result of each candidate TRP combination in all time domain sampling periods is determined.

13. The method of claim 8, wherein, The method further comprises: According to the operation results of the plurality of candidate TRP combinations, the target TRP combination is determined, and the target TRP combination is reported to the base station.

14. The method of claim 8, wherein, The method further comprises: The operation results of the plurality of candidate TRP combinations are reported to the base station, so that the base station determines the target TRP combination from the plurality of candidate TRPs according to the operation results of the plurality of candidate TRP combinations.

15. A method for selecting a transmission and reception point (TRP), the method comprising: obtaining measurement results of a plurality of reference signals sent by a user equipment, wherein the measurement results are obtained by the user equipment through multiple time domain samplings on a plurality of reference signals of a plurality of candidate transmission and reception points (TRPs); determining a target TRP combination from the plurality of candidate TRPs to provide services for the user equipment according to the measurement results.

16. The method of claim 15, wherein, The measurement results include at least one of the following: reference signal received power; Received signal strength indication; Received signal amplitude; Received signal phase; Sign information of the received signal.

17. The method of claim 15, wherein, The method further comprises: sending downlink signaling to the user equipment and the plurality of candidate TRPs, wherein the downlink signaling carries resource configuration information of the plurality of reference signals.

18. The method of claim 17, wherein, The resource configuration information comprises at least one of time domain information, frequency domain information, and code domain information.

19. The method of claim 15, wherein, The time domain resources and / or the frequency domain resources of the plurality of reference signals are the same.

20. The method of claim 15, wherein, Determining, according to the measurement results, a target TRP combination from the plurality of candidate TRPs to provide service for the user equipment comprises: combining the plurality of candidate TRPs to obtain a plurality of candidate TRP combinations, wherein each candidate TRP combination comprises a preset number of candidate TRPs; performing operation on the measurement results of the reference signals corresponding to all candidate TRPs in each candidate TRP combination according to a preset operation mode to obtain an operation result of each candidate TRP combination; and determining the target TRP combination from the plurality of candidate TRP combinations according to the operation results of the candidate TRP combinations.

21. The method of claim 20, wherein, Performing operation on the measurement results of the reference signals corresponding to all candidate TRPs in each candidate TRP combination according to a preset operation mode to obtain an operation result of each candidate TRP combination comprises: performing operation on the measurement results of the reference signals corresponding to all candidate TRPs in each candidate TRP combination in each time domain sampling period according to a preset first operation mode to obtain a plurality of first operation results, wherein each first operation result corresponds to one candidate TRP combination and one time domain sampling period; and performing operation on the first operation results of each candidate TRP combination in all time domain sampling periods according to a preset second operation mode to obtain an operation result of each candidate TRP combination.

22. The method of claim 21, wherein, Performing operation on the measurement results of the reference signals corresponding to all candidate TRPs in each candidate TRP combination according to a preset first operation mode to obtain a plurality of first operation results comprises at least one of: determining, for each time domain sampling period, a superposition result of the measurement results of all reference signals corresponding to each candidate TRP combination; determining, for each time domain sampling period, an average value of the measurement results of all reference signals corresponding to each candidate TRP combination; determining, for each time domain sampling period, a modulus value of the superposition result of the measurement results of all reference signals corresponding to each candidate TRP combination; determining, for each time domain sampling period, an average value of the modulus value of the superposition result of the measurement results of all reference signals corresponding to each candidate TRP combination; determining, for each time domain sampling period, a superposition result of the modulus values of the measurement results of all reference signals corresponding to each candidate TRP combination; determining, for each time domain sampling period, an average value of the modulus values of the measurement results of all reference signals corresponding to each candidate TRP combination.

23. The method of claim 21, wherein, According to a preset second operation mode, the first operation result of each candidate TRP combination in all time domain sampling periods is operated to obtain an operation result of each candidate TRP combination, including at least one of the following: determining the average value of the modulus value of the first operation result of each candidate TRP combination in all time domain sampling periods; determining the average value of the modulus value of the first operation result of each candidate TRP combination in all time domain sampling periods; determining the average value of the modulus value of the first operation result of each candidate TRP combination in all time domain sampling periods; determining the average value of the modulus value of the first operation result of each candidate TRP combination in all time domain sampling periods; determining the average value of the modulus value of the first operation result of each candidate TRP combination in all time domain sampling periods; determining the average value of the modulus value of the first operation result of each candidate TRP combination in all time domain sampling periods; determining the average value of the modulus value of the first operation result of each candidate TRP combination in all time domain sampling periods.

24. A computer-readable storage medium having stored therein a computer program, wherein, The computer program is run by a processor to execute the method in any one of claims 1 to 23.

25. An electronic device comprising a memory and a processor, the memory having stored therein a computer program, the processor being arranged to run the computer program to execute the method in any one of claims 1 to 23.

26. A computer program product comprising a computer program which, when executed by a processor, implements the steps of the method in any one of claims 1 to 23.

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