RRU merging method, base station, terminal and storage medium

Abstract

The embodiment of the invention provides a remote radio unit (RRU) merging method, a base station, a terminal and a storage medium. The RRU merging method comprises the following steps: the base station sends different channel state information reference signal (CSI-RS) resources under different RRUs; the plurality of CSI-RS resources are used for the terminal to carry out layer 1 reference signal receiving power L1-RSRP measurement on the plurality of CSI-RS resources; receiving a target CSI-RS resource sent by the terminal and an L1-RSRP measurement result corresponding to the target CSI-RS resource; the target CSI-RS resources are the CSI-RS resources corresponding to the first N L1-RSRP measurement values which are ranked from large to small, and the first N L1-RSRP measurement values are ranked from large to small; n is a positive integer; based on the L1-RSRP measurement result, determining an RRU to which the terminal belongs from target RRUs corresponding to the target CSI-RS resources; and performing uplink radio frequency combination according to the affiliated RRU.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to an RRU merging method, a base station, a terminal, and a storage medium. Background Art

[0002] The current multiple remote radio unit (RRU) merging solutions usually include a baseband unit (BBU), multiple extension units (EU) and multiple RRUs. Each BBU supports the baseband merging of up to 4 EUs, and each EU supports the RF merging of up to 8 RRUs. Therefore, each cell supports the merging of up to 32 RRUs, which effectively improves the indoor cell coverage of the new radio (NR). However, in the related technology, the RF merging of multiple RRUs supported by each cell will lead to a higher noise floor increase. Summary of the invention

[0003] The embodiments of the present application provide an RRU merging method, a base station, a terminal, and a storage medium, which can reduce the rise of background noise.

[0004] The technical solution of the embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application proposes a remote radio unit (RRU) merging method, which is applied to a base station. The method includes:

[0006] The base station sends different channel state information reference signal (CSI-RS) resources under different RRUs; wherein different RRUs are marked by reference signals; so that the terminal can measure the layer 1 reference signal received power L1-RSRP of the multiple CSI-RS resources;

[0007] receiving a target CSI-RS resource and an L1-RSRP measurement result corresponding to the target CSI-RS resource sent by the terminal; the target CSI-RS resource is a CSI-RS resource corresponding to the first N L1-RSRP measurement values ​​sorted in descending order; N is a positive integer;

[0008] Determine, based on the L1-RSRP measurement result, a home RRU of the terminal from the target RRUs corresponding to the target CSI-RS resources;

[0009] Uplink radio frequency merging is performed according to the belonging RRU.

[0010] In a second aspect, an embodiment of the present application proposes an RRU merging method, which is applied to a terminal, and the method includes:

[0011] Receiving different CSI-RS resources sent by the base station under different RRUs; wherein different RRUs are marked by reference signals;

[0012] Performing L1-RSRP measurement on multiple CSI-RS resources to obtain multiple L1-RSRP measurement values ​​corresponding to the multiple CSI-RS resources;

[0013] Based on the multiple L1-RSRP measurement values, determine a target CSI-RS resource from the multiple CSI-RS resources; and based on the L1-RSRP measurement value corresponding to the target CSI-RS resource, generate an L1-RSRP measurement result corresponding to the target CSI-RS resource;

[0014] The target CSI-RS resource and the L1-RSRP measurement result corresponding to the target CSI-RS resource are sent to a base station so that the base station can perform uplink radio frequency combining.

[0015] In a third aspect, an embodiment of the present application provides a base station, the base station comprising:

[0016] A first sending unit is used for the base station to send different channel state information reference signal CSI-RS resources under different RRUs; so that the terminal can perform L1-RSRP measurement on the multiple CSI-RS resources;

[0017] A first receiving unit is configured to receive a target CSI-RS resource sent by the terminal and an L1-RSRP measurement result corresponding to the target CSI-RS resource; the target CSI-RS resource is a CSI-RS resource corresponding to the first N L1-RSRP measurement values ​​sorted in descending order; N is a positive integer;

[0018] A first determining unit, configured to determine, based on the L1-RSRP measurement result, a home RRU of the terminal from target RRUs corresponding to the target CSI-RS resource;

[0019] The radio frequency combining unit is used to perform uplink radio frequency combining according to the belonging RRU.

[0020] In a fourth aspect, an embodiment of the present application provides a terminal, the terminal comprising:

[0021] A second receiving unit, configured to receive different CSI-RS resources sent by the base station under different RRUs;

[0022] a measuring unit, configured to perform L1-RSRP measurement on the multiple CSI-RS resources to obtain multiple L1-RSRP measurement values ​​corresponding to the multiple CSI-RS resources;

[0023] A second determining unit is configured to determine a target CSI-RS resource from the multiple CSI-RS resources based on the multiple L1-RSRP measurement values; and generate an L1-RSRP measurement result corresponding to the target CSI-RS resource based on the L1-RSRP measurement value corresponding to the target CSI-RS resource;

[0024] The second sending unit is used to send the target CSI-RS resource and the L1-RSRP measurement result corresponding to the target CSI-RS resource to a base station, so that the base station can perform uplink RF combining.

[0025] In a fifth aspect, an embodiment of the present application proposes a base station, comprising: a first processor and a first memory; the first processor implements the above-mentioned RRU merging method when executing an operating program stored in the first memory.

[0026] In a sixth aspect, an embodiment of the present application proposes a terminal, comprising: a second processor and a second memory; the second processor implements the above-mentioned RRU merging method when executing an operating program stored in the second memory.

[0027] In a seventh aspect, an embodiment of the present application proposes a storage medium on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned RRU merging method is implemented.

[0028] An embodiment of the present application provides an RRU merging method and a base station, a terminal, and a storage medium. The method includes: the base station sends different CSI-RS resources under different RRUs, and different RRUs are marked by reference signals; so that the terminal performs L1-RSRP measurement on multiple CSI-RS resources; receives the target CSI-RS resources sent by the terminal and the L1-RSRP measurement results corresponding to the target CSI-RS resources; the target CSI-RS resources are the CSI-RS resources corresponding to the first N L1-RSRP measurement values ​​sorted in order from large to small; N is a positive integer; based on the L1-RSRP measurement results, determine the terminal's belonging RRU from the target RRU corresponding to the target CSI-RS resource; and perform uplink RF merging according to the belonging RRU. By adopting the above implementation scheme, multiple different CSI-RS resources are sent under multiple different RRUs so that the terminal can perform L1-RSRP measurement on multiple CSI-RS resources. The base station selects the RRU to which the terminal belongs based on the measurement results of multiple CSI-RS resources, and finally realizes uplink RF merging based on the RRU to which the terminal belongs. This can avoid using the RRU to which the terminal does not belong to realize uplink RF merging, reduce RF interference between the RRUs, and thereby reduce the noise floor rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a multi-RRU merging solution;

[0030] Figure 2 A schematic diagram of an RRU merging method provided in an embodiment of the present application Figure 1 ;

[0031] Figure 3 A schematic diagram of a combined weight table multiplied by frequency domain data of PRB corresponding to multiple RRU antennas provided in an embodiment of the present application;

[0032] Figure 4 A schematic diagram of an RRU merging method provided in an embodiment of the present application Figure 2 ;

[0033] Figure 5 An interactive schematic diagram of an RRU merging method provided in an embodiment of the present application;

[0034] Figure 6 A schematic diagram of a base station structure provided in an embodiment of the present application Figure 1 ;

[0035] Figure 7 A schematic diagram of a base station structure provided in an embodiment of the present application Figure 2 ;

[0036] Figure 8 A schematic diagram of a terminal structure provided in an embodiment of the present application Figure 1 ;

[0037] Fig. 9 A schematic diagram of a terminal structure provided in an embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0038] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0040] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict. It should also be noted that the terms "first / second / third" involved in the embodiments of the present application are only used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0041] The current multi-RRU merging solution reference Figure 1 , including one BBU, multiple EUs and multiple RRUs. Each BBU supports the baseband merging of up to 4 EUs, and each EU supports the RF merging of up to 8 RRUs. Therefore, each cell can support the merging of up to 32 RRUs, which can effectively improve the NR indoor cell coverage.

[0042] Table 1 gives three division methods of the fronthaul interface, as shown in Table 1 below.

[0043] Table 1

[0044]

[0045] In Table 1, the fronthaul interface is the communication interface between EU and BBU, and between EU and RRU. It can be seen that RF merging of multiple RRUs will increase the noise floor, thereby affecting the receiver performance.

[0046] The current technical solution is mainly to make certain judgments and selections on the signals in the EU.

[0047] In the first method, the BBU transmits the uplink scheduling parameters to the EU, which performs channel estimation on the uplink signals of each RRU based on the demodulation reference signal (DMRS) parameter information to identify the source of the valid signal. Only the uplink data of the RRU with a valid signal will be transmitted to the BBU, and the uplink data of the RRU without a valid signal will not be merged to avoid raising the noise floor. However, the complexity of this solution is increased, and an extension unit is required to implement the baseband function of channel estimation, which greatly reduces the cost advantage of the scalable base station.

[0048] The second method is that the expansion unit simply determines the amplitude of the frequency domain data of each physical resource block (PRB) of each RRU and compares it with the average value of the background noise. If the amplitude of the frequency domain data of each antenna of the PRB is the largest relative to other RRUs and is significantly larger than the average value of the background noise, it is considered that there is a valid signal. However, this solution is not reliable and is prone to misjudgment.

[0049] To solve the above problems, the present application provides an RRU merging method, such as Figure 2 As shown, applied to a base station, the method may include:

[0050] S101. A base station sends different CSI-RS resources under different RRUs, so that a terminal can measure layer 1 reference signal received power L1-RSRP on multiple CSI-RS resources.

[0051] In some embodiments, a base station is a device that provides wireless communication functions for terminal devices, including but not limited to: an evolved base station (evolutional Node B, also referred to as eNB or e-NodeB) in a Long-Term Evolution (LTE) system, a New Radio (NR) system, or a Licensed-Assisted Access using Long-Term Evolution (LAA-LTE) system, a macro base station, a micro base station (also referred to as a "small base station"), a pico base station, etc.

[0052] In an embodiment of the present application, before the base station sends different channel state information reference signal CSI-RS resources under different RRUs, it also includes: configuring a CSI-RS resource set for L1-RSRP measurement; the CSI-RS resource set includes multiple CSI-RS resources.

[0053] It should be noted that different CSI-RS resources are sent under different RRUs to feedback the channel status, so that different RRUs can be marked by reference signals. The number of CSI-RS resources used for L1-RSRP measurement cannot exceed 16, and each resource set can have a maximum of 64 CSI-RS resources, and the total number of resources in all resource sets does not exceed 128.

[0054] In an embodiment of the present application, the base station configures a CSI-RS resource set for L1-RSRP measurement, and the CSI-RS resource type selects 38211Table 7.4.1.5.3-1Row 2 single-port CSI-RS, and the maximum configuration in the resource set does not exceed 12 Row 2 single-port CSI-RS resources.

[0055] S102. Receive a target CSI-RS resource and an L1-RSRP measurement result corresponding to the target CSI-RS resource sent by a terminal; the target CSI-RS resource is a CSI-RS resource corresponding to the first N L1-RSRP measurement values ​​sorted in descending order; N is a positive integer.

[0056] In an embodiment of the present application, the receiving terminal sends a maximum L1-RSRP measurement value, N-1 measurement differences between N-1 L1-RSRP measurement values ​​and the maximum L1-RSRP measurement value, a first CSI-RS resource corresponding to the maximum L1-RSRP measurement value, and N-1 second CSI-RS resources corresponding to the N-1 L1-RSRP measurement values; wherein the maximum L1-RSRP measurement value and the N-1 measurement differences constitute the L1-RSRP measurement result, and the first CSI-RS resource and the N-1 second CSI-RS resources constitute the target CSI-RS resource.

[0057] In an optional embodiment, the terminal periodically measures the CSI-RS resources and reports the L1-RSRP. According to the configured L1-RSRP reporting requirement, the terminal reports the maximum L1-RSRP value, the CSI-RS corresponding to the maximum L1-RSRP value, and the difference between the second, third, fourth and L1-RSRP maximum values, and the corresponding CSI-RS.

[0058] In an optional embodiment, the number of CSI-RS resources reported by the terminal is at most 4, and the specific number can be selected according to actual conditions, and the embodiment of the present application does not make any specific limitation.

[0059] S103: Based on the L1-RSRP measurement result, determine the home RRU of the terminal from the target RRUs corresponding to the target CSI-RS resources.

[0060] In an embodiment of the present application, a first measurement difference whose measurement difference is less than a preset measurement difference threshold is determined from N-1 measurement difference values; a target second CSI-RS resource corresponding to the first measurement difference is searched from N-1 second CSI-RS resources; and a first RRU corresponding to the first CSI-RS resource and a second RRU corresponding to the target second CSI-RS resource are determined as belonging RRUs.

[0061] In an optional embodiment, the base station periodically calculates and updates the RRU to which each terminal belongs based on the periodic measurement report of each terminal, where the maximum value of L1-RSRP is recorded as The difference between the second, third, fourth and maximum L1-RSRP values ​​is recorded as The corresponding RRU and Less than the preset measurement difference threshold T RSRP The RRU of the terminal is considered to be the RRU to which the terminal belongs, where T RSRP Configurable. The assigned RRU determined here is used as the merged RRU of the frequency domain resources to which this terminal belongs.

[0062] S104: Perform uplink radio frequency merging according to the assigned RRU.

[0063] In the embodiment of the present application, the base station performs radio resource management of each RRU. The radio frequency unit exchanges IQ (co-directional signal I and quadrature signal Q) to the baseband processing unit to jointly complete the wireless bearing of user service data.

[0064] In the embodiment of the present application, a merging weight table of PRBs occupied by the terminal is generated according to the belonging RRU; and uplink RF merging is performed according to the merging weight table.

[0065] Specifically, L2 resource allocation and generating a combined weight table for the terminal PRB. That is, the base station allocates time-frequency resources to the terminal according to its own scheduling algorithm, and the time-frequency resources are used to send the combined weight table to the extension unit. And the combined weight table of PRB is generated according to the periodic reporting of the terminal L1-RSRP.

[0066] It should be noted that generating a merged weight table of terminal occupation of PRB according to the belonging RRU includes: generating a merged weight table by marking the weight of the first RRU as 1, marking the weight of the second RRU as the first value, and marking the weight of the third RRU as zero; wherein the first value is obtained according to the first measurement difference; the third RRU is an RRU other than the first RRU and the second RRU among multiple different RRUs.

[0067] In an optional embodiment, The corresponding RRU weight is marked as 1. The RRU weight is marked as 0. The RRU weight is marked as All RRUs in unscheduled PRBs are marked as 0. Finally, a weight matrix with the dimension of number of PRBs*number of RRUs is formed. This weight matrix is ​​the combined weight table.

[0068] It should be noted that this method utilizes the channel heterogeneity of the time division duplex (TDD) system, and the periodic measurement of the terminal more accurately reflects the coverage relationship between the terminal and the RRU; the difference with the maximum value is used as the judgment threshold, which is not affected by the absolute power size. The weight generation will merge multiple different RRUs with coverage relationship according to the measured value of the terminal in proportion, and the weight accuracy is higher, which is more conducive to the integration of valid signals and avoids the integration of interference. It avoids the disadvantages of using absolute power value as the threshold, the weight coefficient is either 1 or 0, and the absolutism and poor accuracy.

[0069] For example, taking 273PRBs and 8RRUs as an example, assuming that terminal 0 occupies PRB0-15, RRU0 is the RRU with the largest L1-RSRP, and the difference between RRU1 and 2 and the maximum L1-RSRP is less than the threshold; terminal 1 occupies PRB16-272, RRU5 is the RRU with the largest L1-RSRP, and the difference between RRU6 and 7 and the maximum L1-RSRP is less than the threshold. The combined weight table is shown in Table 2.

[0070] Table 2

[0071]

[0072] In an embodiment of the present application, uplink RF combining is performed according to a combining weight table, including: sending the combining weight table to an extension unit so that the extension unit can implement uplink RF combining based on the combining weight table and PRB frequency domain data of corresponding antennas of multiple different RRUs.

[0073] In an optional embodiment, the merging weight table is sent to the extension unit every transmission time interval (Transmission Time Interval, TTI). The extension unit merges the uplink frequency domain data according to the merging weight table. Specifically, the per-PRB merging weight is multiplied by the frequency domain data of each PRB at each RRU corresponding antenna, and the data of multiple RRU corresponding antennas are finally weighted and merged into one group of data.

[0074] For example, taking the weights of PRB0 RRU0-7 in Table 2 as an example, multiply it by each subcarrier of PRB0 to obtain the uplink RF combined data. Figure 3 .

[0075] It can be understood that by sending multiple different CSI-RS resources under multiple different RRUs so that the terminal can perform L1-RSRP measurements on multiple CSI-RS resources, the base station selects the RRU to which the terminal belongs based on the measurement results of multiple CSI-RS resources, and finally realizes uplink RF merging based on the RRU to which the terminal belongs. This can avoid using the RRU to which the terminal does not belong to realize uplink RF merging, reduce RF interference between the RRUs, and thereby reduce the noise floor rise.

[0076] Based on the above embodiments, the present application also proposes an RRU merging method, see Figure 4 , applied to a terminal, the method comprising:

[0077] S201. Receive different CSI-RS resources sent by a base station under different RRUs.

[0078] In some embodiments, the terminal device may be referred to as User Equipment (UE). The terminal device may be a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), etc. The terminal device may also be a smart phone, a tablet computer, a PDA, a Mobile Station (MS), a Mobile Terminal, etc. The terminal device may communicate with one or more network devices via a Radio Access Network (RAN). For example, the terminal device may be a mobile phone (or a "cellular" phone) or a computer with a terminal device, etc. For example, the terminal device may also be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device, which exchanges voice and / or data with a wireless access network. The terminal device may also be a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future evolving network, etc., which is not limited in the implementation of this application.

[0079] S202: Perform L1-RSRP measurement on multiple CSI-RS resources to obtain multiple L1-RSRP measurement values ​​corresponding to the multiple CSI-RS resources.

[0080] S203. Determine a target CSI-RS resource from multiple CSI-RS resources based on multiple L1-RSRP measurement values; and generate an L1-RSRP measurement result corresponding to the target CSI-RS resource based on the L1-RSRP measurement value corresponding to the target CSI-RS resource.

[0081] In an embodiment of the present application, a maximum L1-RSRP measurement value and N-1 L1-RSRP measurement values ​​arranged in descending order after the maximum L1-RSRP measurement value are searched from multiple L1-RSRP measurement values; a first CSI-RS resource corresponding to the maximum L1-RSRP measurement value and N-1 second CSI-RS resources corresponding to the N-1 L1-RSRP measurement values ​​are searched from multiple CSI-RS resources; the first CSI-RS resource and the N-1 second CSI-RS resources constitute the target CSI-RS resources.

[0082] In an embodiment of the present application, N-1 measurement differences between N-1 L1-RSRP measurement values ​​and the maximum L1-RSRP measurement value are determined; wherein the maximum L1-RSRP measurement value and the N-1 measurement differences constitute the target CSI-RS resource.

[0083] S204: Send the target CSI-RS resource and the L1-RSRP measurement result corresponding to the target CSI-RS resource to the base station, so that the base station can perform uplink RF combining.

[0084] It can be understood that by sending multiple different CSI-RS resources under multiple different RRUs so that the terminal can perform L1-RSRP measurements on multiple CSI-RS resources, the base station selects the RRU to which the terminal belongs based on the measurement results of multiple CSI-RS resources, and finally realizes uplink RF merging based on the RRU to which the terminal belongs. This can avoid using the RRU to which the terminal does not belong to realize uplink RF merging, reduce RF interference between the RRUs, and thereby reduce the noise floor rise.

[0085] Based on the above embodiments, the present application embodiment proposes an RRU merging method, such as Figure 5 As shown, the method may include:

[0086] 1. The base station sends different CSI-RS resources under different RRUs.

[0087] 2. The terminal performs L1-RSRP measurement on multiple CSI-RS resources to obtain multiple L1-RSRP measurement values ​​corresponding to the multiple CSI-RS resources.

[0088] 3. The terminal determines a target CSI-RS resource from multiple CSI-RS resources based on multiple L1-RSRP measurement values; and generates an L1-RSRP measurement result corresponding to the target CSI-RS resource based on the L1-RSRP measurement value corresponding to the target CSI-RS resource.

[0089] 4. The terminal sends the target CSI-RS resource and the L1-RSRP measurement result corresponding to the target CSI-RS resource to the base station.

[0090] 5. Based on the L1-RSRP measurement result, the base station determines the RRU to which the terminal belongs from the target RRUs corresponding to the target CSI-RS resources.

[0091] 6. The base station performs uplink RF merging according to the assigned RRU.

[0092] Based on the above embodiments, the present application embodiment provides a base station 1. Figure 6 As shown, the base station 1 includes:

[0093] The first sending unit 10 is used for the base station to send multiple different channel state information reference signal CSI-RS resources under different RRUs; so that the terminal can perform L1-RSRP measurement on the multiple CSI-RS resources;

[0094] The first receiving unit 11 is used to receive the target CSI-RS resource sent by the terminal and the L1-RSRP measurement result corresponding to the target CSI-RS resource; the target CSI-RS resource is the CSI-RS resource corresponding to the first N L1-RSRP measurement values ​​sorted in descending order; N is a positive integer;

[0095] A first determining unit 12 is configured to determine a home RRU of the terminal from target RRUs corresponding to the target CSI-RS resources based on the L1-RSRP measurement result;

[0096] The radio frequency combining unit 13 is used to perform uplink radio frequency combining according to the belonging RRU.

[0097] Optionally, the first receiving unit 11 is also used to receive the maximum L1-RSRP measurement value sent by the terminal, N-1 measurement differences between N-1 L1-RSRP measurement values ​​and the maximum L1-RSRP measurement value, the first CSI-RS resource corresponding to the maximum L1-RSRP measurement value, and N-1 second CSI-RS resources corresponding to the N-1 L1-RSRP measurement values; wherein the maximum L1-RSRP measurement value and the N-1 measurement differences constitute the L1-RSRP measurement result, and the first CSI-RS resource and the N-1 second CSI-RS resources constitute the target CSI-RS resources.

[0098] Optionally, the base station further includes: a search unit;

[0099] The first determining unit 12 is further configured to determine, from the N-1 measurement differences, a first measurement difference whose measurement difference is less than a preset measurement difference threshold;

[0100] The searching unit is configured to search the target second CSI-RS resource corresponding to the first measurement difference from the N-1 second CSI-RS resources;

[0101] The first determining unit 12 is further configured to determine a first RRU corresponding to the first CSI-RS resource and a second RRU corresponding to the target second CSI-RS resource as the home RRU.

[0102] Optionally, the radio frequency merging unit 13 is further used to generate a merging weight table of PRBs occupied by the terminal according to the belonging RRU; and perform uplink radio frequency merging according to the merging weight table.

[0103] Optionally, the base station further includes: a marking unit;

[0104] The marking unit is used to generate the combined weight table by marking the weight of the first RRU as 1, the weight of the second RRU as the first value, and the weight of the third RRU as zero; wherein the first value is obtained according to the first measurement difference; and the third RRU is an RRU other than the first RRU and the second RRU among multiple different RRUs.

[0105] Optionally, the base station further includes: a sending unit;

[0106] The sending unit is used to send the combined weight table to the extension unit, so that the extension unit can realize uplink RF combining based on the combined weight table and the frequency domain data of the PRB corresponding to multiple different RRU antennas.

[0107] Optionally, the base station further includes: a configuration unit;

[0108] The configuration unit is used to configure a CSI-RS resource set for L1-RSRP measurement; the CSI-RS resource set includes the multiple CSI-RS resources.

[0109] An embodiment of the present application provides a base station, which sends different channel state information reference signal CSI-RS resources under different RRUs; so that a terminal can perform layer 1 reference signal received power L1-RSRP measurement on multiple CSI-RS resources; a target CSI-RS resource sent by the terminal and an L1-RSRP measurement result corresponding to the target CSI-RS resource are received; the target CSI-RS resource is the CSI-RS resource corresponding to the first N L1-RSRP measurement values ​​sorted in descending order; N is a positive integer; based on the L1-RSRP measurement result, the terminal's belonging RRU is determined from the target RRU corresponding to the target CSI-RS resource; and uplink RF merging is performed according to the belonging RRU. It can be seen that the base station proposed in the embodiment of the present application sends multiple different CSI-RS resources under multiple different RRUs so that the terminal can perform L1-RSRP measurement on multiple CSI-RS resources. The base station selects the RRU to which the terminal belongs based on the measurement results of multiple CSI-RS resources, and finally realizes uplink RF merging based on the RRU to which the terminal belongs. This can avoid using the RRU to which the terminal does not belong to realize uplink RF merging, reduce RF interference between the RRUs, and thereby reduce the noise floor rise.

[0110] Figure 7 A schematic diagram of the structure of a base station 1 provided in an embodiment of the present application Figure 2 In practical applications, based on the same disclosure concept of the above embodiments, Figure 7 As shown, the base station 1 of this embodiment includes: a first processor 14 , a first memory 15 and a first communication bus 16 .

[0111] In the process of a specific embodiment, the first processor 14 can be at least one of an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing image processing device (DSPD), a programmable logic image processing device (PLD), a field programmable gate array (FPGA), a CPU, a controller, a microcontroller, and a microprocessor. It can be understood that for different devices, the electronic device used to implement the above-mentioned processor function can also be other, and this embodiment does not specifically limit it.

[0112] In the embodiment of the present application, the first communication bus 16 is used to realize the connection communication between the first processor 14 and the first memory 15; when the first processor 14 executes the running program stored in the first memory 15, the following RRU merging method is implemented:

[0113] The base station sends different channel state information reference signal CSI-RS resources under different RRUs; so that the terminal can perform layer 1 reference signal received power L1-RSRP measurement on the multiple CSI-RS resources; receives the target CSI-RS resources sent by the terminal and the L1-RSRP measurement results corresponding to the target CSI-RS resources; the target CSI-RS resources are the CSI-RS resources corresponding to the first N L1-RSRP measurement values ​​sorted in order from large to small; N is a positive integer; based on the L1-RSRP measurement results, the RRU to which the terminal belongs is determined from the target RRU corresponding to the target CSI-RS resources; and uplink RF merging is performed according to the belonging RRU.

[0114] Further, the above-mentioned first processor 14 is also used to receive the maximum L1-RSRP measurement value sent by the terminal, N-1 measurement differences between N-1 L1-RSRP measurement values ​​and the maximum L1-RSRP measurement value, the first CSI-RS resource corresponding to the maximum L1-RSRP measurement value, and N-1 second CSI-RS resources corresponding to the N-1 L1-RSRP measurement values; wherein the maximum L1-RSRP measurement value and the N-1 measurement differences constitute the L1-RSRP measurement result, and the first CSI-RS resource and the N-1 second CSI-RS resources constitute the target CSI-RS resource.

[0115] Furthermore, the above-mentioned first processor 14 is also used to determine a first measurement difference whose measurement difference is less than a preset measurement difference threshold from the N-1 measurement differences; search for the target second CSI-RS resource corresponding to the first measurement difference from the N-1 second CSI-RS resources; and determine the first RRU corresponding to the first CSI-RS resource and the second RRU corresponding to the target second CSI-RS resource as the belonging RRU.

[0116] Furthermore, the first processor 14 is further configured to generate a merging weight table of PRBs occupied by the terminal according to the belonging RRU; and perform uplink RF merging according to the merging weight table.

[0117] Furthermore, the above-mentioned first processor 14 is also used to generate the merged weight table by marking the weight of the first RRU as 1, the weight of the second RRU as the first value, and the weight of the third RRU as zero; wherein the first value is obtained according to the first measurement difference; and the third RRU is an RRU among multiple different RRUs except the first RRU and the second RRU.

[0118] Furthermore, the first processor 14 is also used to send the merging weight table to the extension unit, so that the extension unit can realize uplink RF merging based on the merging weight table and the frequency domain data of the PRB corresponding antennas of multiple different RRUs.

[0119] Furthermore, the first processor 14 is further configured to configure a CSI-RS resource set for L1-RSRP measurement; the CSI-RS resource set includes the multiple CSI-RS resources.

[0120] The present application embodiment also provides a terminal 2, such as Figure 8 As shown, the terminal 2 includes:

[0121] The second receiving unit 20 is configured to receive different CSI-RS resources sent by the base station under different RRUs;

[0122] A measuring unit 21 is configured to perform L1-RSRP measurement on a plurality of CSI-RS resources to obtain a plurality of L1-RSRP measurement values ​​corresponding to the plurality of CSI-RS resources;

[0123] A second determining unit 22 is configured to determine a target CSI-RS resource from the multiple CSI-RS resources based on the multiple L1-RSRP measurement values; and generate an L1-RSRP measurement result corresponding to the target CSI-RS resource based on the L1-RSRP measurement value corresponding to the target CSI-RS resource;

[0124] The second sending unit 23 is used to send the target CSI-RS resource and the L1-RSRP measurement result corresponding to the target CSI-RS resource to the base station, so that the base station can perform uplink RF combining.

[0125] Optionally, the terminal further includes: a search unit;

[0126] The search unit is further configured to search for a maximum L1-RSRP measurement value from the multiple L1-RSRP measurement values, and N-1 L1-RSRP measurement values ​​arranged in descending order after the maximum L1-RSRP measurement value; and search for a first CSI-RS resource corresponding to the maximum L1-RSRP measurement value and N-1 second CSI-RS resources corresponding to the N-1 L1-RSRP measurement values ​​from the multiple CSI-RS resources; wherein the first CSI-RS resource and the N-1 second CSI-RS resources constitute the target CSI-RS resource;

[0127] The second determination unit 22 is further configured to determine N-1 measurement differences between the N-1 L1-RSRP measurement values ​​and the maximum L1-RSRP measurement value; wherein the maximum L1-RSRP measurement value and the N-1 measurement differences constitute the target CSI-RS resource.

[0128] A terminal provided in an embodiment of the present application receives different CSI-RS resources sent by a base station under different RRUs; performs L1-RSRP measurement on multiple CSI-RS resources to obtain multiple L1-RSRP measurement values ​​corresponding to the multiple CSI-RS resources; determines a target CSI-RS resource from multiple CSI-RS resources based on the multiple L1-RSRP measurement values; and generates an L1-RSRP measurement result corresponding to the target CSI-RS resource based on the L1-RSRP measurement value corresponding to the target CSI-RS resource; and sends the target CSI-RS resource and the L1-RSRP measurement result corresponding to the target CSI-RS resource to the base station for the base station to perform uplink RF combining. It can be seen that the terminal proposed in this embodiment sends multiple different CSI-RS resources under multiple different RRUs so that the terminal can perform L1-RSRP measurements on multiple CSI-RS resources. The base station selects the RRU to which the terminal belongs based on the measurement results of multiple CSI-RS resources, and finally realizes uplink RF merging based on the RRU to which the terminal belongs. This can avoid using the RRU to which the terminal does not belong to realize uplink RF merging, reduce RF interference between the RRUs, and thereby reduce the noise floor rise.

[0129] Fig. 9 A schematic diagram of the structure of a terminal 2 provided in an embodiment of the present application Figure 2In practical applications, based on the same disclosure concept of the above embodiments, Fig. 9 As shown, the terminal 2 of this embodiment includes: a second processor 24 , a second memory 25 and a second communication bus 26 .

[0130] In the specific embodiment, the second processor 24 may be at least one of ASIC, DSP, DSPD, PLD, FPGA, CPU, controller, microcontroller, and microprocessor. It is understandable that for different devices, the electronic device used to implement the processor function may also be other, which is not specifically limited in this embodiment.

[0131] In the embodiment of the present application, the second communication bus 26 is used to realize the connection communication between the second processor 24 and the second memory 25; when the second processor 24 executes the running program stored in the second memory 25, the following RRU merging method is implemented:

[0132] Receive different CSI-RS resources sent by a base station under different RRUs; perform L1-RSRP measurements on the multiple CSI-RS resources to obtain multiple L1-RSRP measurement values ​​corresponding to the multiple CSI-RS resources; determine a target CSI-RS resource from the multiple CSI-RS resources based on the multiple L1-RSRP measurement values; and generate an L1-RSRP measurement result corresponding to the target CSI-RS resource based on the L1-RSRP measurement value corresponding to the target CSI-RS resource; send the target CSI-RS resource and the L1-RSRP measurement result corresponding to the target CSI-RS resource to the base station for the base station to perform uplink RF combining.

[0133] Further, the second processor 24 is also used to search for a maximum L1-RSRP measurement value from the multiple L1-RSRP measurement values, and N-1 L1-RSRP measurement values ​​arranged in descending order after the maximum L1-RSRP measurement value; search for a first CSI-RS resource corresponding to the maximum L1-RSRP measurement value, and N-1 second CSI-RS resources corresponding to the N-1 L1-RSRP measurement values ​​from the multiple CSI-RS resources; wherein the first CSI-RS resource and the N-1 second CSI-RS resources constitute the target CSI-RS resource; determine N-1 measurement differences between the N-1 L1-RSRP measurement values ​​and the maximum L1-RSRP measurement value; wherein the maximum L1-RSRP measurement value and the N-1 measurement differences constitute the target CSI-RS resource.

[0134] An embodiment of the present application provides a storage medium having a computer program stored thereon. The computer-readable storage medium stores one or more programs. The one or more programs can be executed by one or more processors and applied to a terminal and / or a base station. The computer program implements the RRU merging method as described above.

[0135] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0136] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present disclosure, or the part that contributes to the relevant technology, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for enabling an image display device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present disclosure.

[0137] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application.

Claims

1. A remote radio unit (RRU) merging method, characterized in that: Applied to a base station, the method comprises: The base station sends different channel state information reference signal CSI-RS resources under different RRUs, so that the terminal can measure the layer 1 reference signal received power L1-RSRP of multiple CSI-RS resources; receiving a target CSI-RS resource and an L1-RSRP measurement result corresponding to the target CSI-RS resource sent by the terminal; the target CSI-RS resource is a CSI-RS resource corresponding to the first N L1-RSRP measurement values ​​sorted in descending order; N is a positive integer; Determine, based on the L1-RSRP measurement result, a home RRU of the terminal from the target RRUs corresponding to the target CSI-RS resources; Uplink radio frequency merging is performed according to the belonging RRU.

2. The method according to claim 1, characterized in that The receiving a target CSI-RS resource sent by the terminal and an L1-RSRP measurement result corresponding to the target CSI-RS resource includes: Receiving a maximum L1-RSRP measurement value sent by the terminal, N-1 measurement differences between N-1 L1-RSRP measurement values ​​and the maximum L1-RSRP measurement value, a first CSI-RS resource corresponding to the maximum L1-RSRP measurement value, and N-1 second CSI-RS resources corresponding to the N-1 L1-RSRP measurement values; The maximum L1-RSRP measurement value and the N-1 measurement differences constitute the L1-RSRP measurement result, and the first CSI-RS resource and the N-1 second CSI-RS resources constitute the target CSI-RS resource.

3. The method according to claim 2, characterized in that The determining, based on the L1-RSRP measurement result, the home RRU of the terminal from the target RRUs corresponding to the target CSI-RS resources includes: Determine, from the N-1 measurement difference values, a first measurement difference value whose measurement difference value is less than a preset measurement difference threshold value; Searching, from the N-1 second CSI-RS resources, the target second CSI-RS resource corresponding to the first measurement difference; A first RRU corresponding to the first CSI-RS resource and a second RRU corresponding to the target second CSI-RS resource are determined as the home RRUs.

4. The method according to claim 1, characterized in that The performing uplink radio frequency merging according to the belonging RRU includes: Generating a combined weight table of PRBs occupied by the terminal according to the home RRU; Uplink radio frequency combining is performed according to the combining weight table.

5. The method according to claim 4, characterized in that The generating, according to the belonging RRU, a combined weight table of PRBs occupied by the terminal includes: Generate the combined weight table by marking the weight of the first RRU as 1, marking the weight of the second RRU as the first value, and marking the weight of the third RRU as zero; The first value is obtained according to the first measurement difference; and the third RRU is an RRU other than the first RRU and the second RRU among a plurality of different RRUs.

6. The method according to claim 4 or 5, characterized in that: The performing uplink radio frequency combining according to the combining weight table includes: The merging weight table is sent to the extension unit, so that the extension unit realizes uplink RF merging based on the merging weight table and the frequency domain data of the PRB corresponding to antennas of multiple different RRUs.

7. The method according to claim 1, characterized in that Before the base station sends different channel state information reference signal CSI-RS resources under different RRUs, the method further includes: A CSI-RS resource set for L1-RSRP measurement is configured; the CSI-RS resource set includes the multiple CSI-RS resources.

8. A RRU merging method, characterized in that: Applied to a terminal, the method comprises: Receiving different CSI-RS resources sent by the base station under different RRUs; Performing L1-RSRP measurement on multiple CSI-RS resources to obtain multiple L1-RSRP measurement values ​​corresponding to the multiple CSI-RS resources; Based on the multiple L1-RSRP measurement values, determine a target CSI-RS resource from the multiple CSI-RS resources; and based on the L1-RSRP measurement value corresponding to the target CSI-RS resource, generate an L1-RSRP measurement result corresponding to the target CSI-RS resource; The target CSI-RS resource and the L1-RSRP measurement result corresponding to the target CSI-RS resource are sent to a base station so that the base station can perform uplink radio frequency combining.

9. The method according to claim 8, characterized in that The determining, based on the multiple L1-RSRP measurement values, a target CSI-RS resource from the multiple CSI-RS resources comprises: Searching for a maximum L1-RSRP measurement value and N-1 L1-RSRP measurement values ​​arranged in descending order after the maximum L1-RSRP measurement value from the multiple L1-RSRP measurement values; Searching, from the multiple CSI-RS resources, a first CSI-RS resource corresponding to the maximum L1-RSRP measurement value and N-1 second CSI-RS resources corresponding to the N-1 L1-RSRP measurement values; wherein the first CSI-RS resource and the N-1 second CSI-RS resources constitute the target CSI-RS resource; Generating the L1-RSRP measurement result corresponding to the target CSI-RS resource based on the L1-RSRP measurement value corresponding to the target CSI-RS resource includes: Determine N-1 measurement differences between the N-1 L1-RSRP measurement values ​​and the maximum L1-RSRP measurement value; wherein the maximum L1-RSRP measurement value and the N-1 measurement differences constitute the target CSI-RS resource.

10. A base station, characterized in that: The base station comprises: A first sending unit is used for the base station to send different channel state information reference signal CSI-RS resources under different RRUs; so that the terminal can perform L1-RSRP measurement on multiple CSI-RS resources; A first receiving unit is configured to receive a target CSI-RS resource sent by the terminal and an L1-RSRP measurement result corresponding to the target CSI-RS resource; the target CSI-RS resource is a CSI-RS resource corresponding to the first N L1-RSRP measurement values ​​sorted in descending order; N is a positive integer; A first determining unit, configured to determine, based on the L1-RSRP measurement result, a home RRU of the terminal from target RRUs corresponding to the target CSI-RS resource; The radio frequency combining unit is used to perform uplink radio frequency combining according to the belonging RRU.

11. A terminal, characterized in that: The terminal comprises: A second receiving unit, configured to receive different CSI-RS resources sent by the base station under different RRUs; A measuring unit, configured to perform L1-RSRP measurement on a plurality of CSI-RS resources to obtain a plurality of L1-RSRP measurement values ​​corresponding to the plurality of CSI-RS resources; A second determining unit is configured to determine a target CSI-RS resource from the multiple CSI-RS resources based on the multiple L1-RSRP measurement values; and generate an L1-RSRP measurement result corresponding to the target CSI-RS resource based on the L1-RSRP measurement value corresponding to the target CSI-RS resource; The second sending unit is used to send the target CSI-RS resource and the L1-RSRP measurement result corresponding to the target CSI-RS resource to a base station, so that the base station can perform uplink RF combining.

12. A base station, characterized in that: The base station comprises: a first processor and a first memory; when the first processor executes the running program stored in the first memory, the method according to any one of claims 1 to 7 is implemented.

13. A terminal, characterized in that: The terminal includes: a second processor and a second memory; when the second processor executes the running program stored in the second memory, the method according to any one of claims 8 to 9 is implemented.

14. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 9 is implemented.

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