Dynamic selection method and device for SRS time domain resources, storage medium and electronic device

Abstract

The embodiment of the present invention provides a method and device for dynamically selecting SRS time domain resources, a storage medium and an electronic device, the method comprising: obtaining a current SRS time domain resource configuration and a candidate SRS time domain resource configuration, wherein the current SRS time domain resource configuration is a time domain symbol resource configuration being used, determining a first performance parameter of the current SRS time domain resource configuration and a second performance parameter of the candidate SRS time domain resource configuration according to first measurement information, and replacing the current SRS time domain resource configuration with an SRS time domain resource configuration in the target SRS time domain resource configuration when there is a target SRS time domain resource configuration in the candidate SRS time domain resource configuration. Through the embodiment of the present invention, the problem of low uplink and downlink system performance caused by unreasonable selection of cell SRS time domain resources is solved, thereby achieving the effect of improving uplink and downlink system performance.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communications, and in particular, to a method and device for dynamically selecting SRS time domain resources, a storage medium, and an electronic device. Background Art

[0002] SRS (Sounding reference signal) plays an important role in LTE / NR systems. For uplink, it is mainly used to measure the uplink channel status, so as to determine the uplink MCS (Modulation and Coding Scheme); for downlink, it is mainly used to obtain the downlink beam-sharing weights in the uplink and downlink reciprocity system, such as using the reciprocity of the uplink and downlink channels in the time division duplex (TDD) system to obtain the downlink beam-sharing weights based on SRS channel estimation. The accuracy and timeliness of SRS channel estimation affect the performance of both uplink and downlink systems.

[0003] The 3GPP protocol defines symbols that can be used to send SRS. For example, in the LTE system, SRS can be allocated to uplink symbols of a special (S) subframe or to some symbols of an uplink (U) subframe (such as the last symbol of a U subframe).

[0004] The selection of cell SRS time domain symbols has a significant impact on uplink and downlink system performance:

[0005] The interference (NI) on different SRS symbols may be different, especially in areas with severe atmospheric waveguides. The local cell will be affected by the downlink of the remote cell. According to the characteristics of atmospheric waveguide interference, the interference on the S subframe will be much higher than the interference on the U subframe; even in the absence of atmospheric waveguides, due to the complex network environment and different situations in neighboring cells, the degree of interference on each symbol is different. The interference level on the SRS symbol affects the accuracy of the SRS channel estimation. The greater the interference, the lower the accuracy of the SRS channel estimation, and the worse the performance of the uplink and downlink systems.

[0006] The number of SRS time domain symbols will affect the capacity and period of SRS. The more time domain symbols available for SRS, the larger the SRS capacity will be or the smaller the period will be. The SRS capacity refers to the number of users that can support the configuration of SRS. If the user does not have SRS, the acquisition of channel quality information for uplink users will be affected. For downlink users, the BF (Beam forming) transmission scheme cannot be used to obtain beamforming gain, especially for massive multi-antenna systems (Massive MIMO). There is a large performance loss. The size of the SRS period will affect the timeliness of SRS. The larger the SRS period, the longer the timeliness of obtaining uplink channel state information and downlink beamforming weights will be, and the corresponding performance will be worse.

[0007] If SRS is allowed to be allocated in the U subframe, the number of SRS time domain symbols will increase, but it will lead to fewer available symbols for the uplink traffic channel (PUSCH), which will cause an increase in the uplink code rate and a decrease in throughput.

[0008] Based on the above analysis, how to reasonably select the cell SRS time domain symbol resources plays an important role in improving system performance.

[0009] The existing SRS resource allocation scheme mainly allocates different resource sets to different neighboring cells from the perspective of inter-cell resource coordination (or Comp UE resource staggering), thereby reducing inter-cell SRS interference. The problem with these technical solutions is that they mainly consider inter-cell interference coordination. When non-inter-cell interference is dominant, such as when atmospheric waveguide is serious, the difference in interference between different symbols is not considered when selecting cell SRS time domain resources, which will cause system performance to deteriorate. In addition, the existing schemes do not comprehensively evaluate the impact of SRS interference, SRS symbol number, etc. on uplink and downlink system performance.

[0010] That is to say, in the prior art, when selecting cell SRS time domain resources, the impact of differences in interference levels on different SRS symbols caused by interference such as atmospheric waveguides on resource selection is not taken into account, resulting in unreasonable cell SRS time domain resource selection, and further causing low uplink and downlink system performance. Summary of the invention

[0011] The embodiments of the present invention provide a method and device for dynamically selecting SRS time domain resources, a storage medium and an electronic device, so as to at least solve the problem of low uplink and downlink system performance caused by unreasonable selection of cell SRS time domain resources in the related art.

[0012] According to one embodiment of the present invention, a method for dynamically selecting SRS time domain resources is provided, comprising: obtaining a current SRS time domain resource configuration and a candidate SRS time domain resource configuration, wherein the current SRS time domain resource configuration is a time domain symbol resource configuration currently being used; determining a first performance parameter of the current SRS time domain resource configuration and a second performance parameter of the candidate SRS time domain resource configuration based on first measurement information, wherein the first performance parameter is used to represent the system performance under the current SRS time domain resource configuration, and the second performance parameter is used to represent the system performance under the candidate SRS time domain resource configuration, and the first measurement information includes an interference impact factor on the SRS symbol; when a target SRS time domain resource configuration exists in the candidate SRS time domain resource configuration, replacing the current SRS time domain resource configuration with an SRS time domain resource configuration in the target SRS time domain resource configuration, wherein the second performance parameter of the target SRS time domain resource configuration is greater than the product of the first performance parameter and a preset ratio, and the preset ratio is greater than 1.

[0013] The interference impact factor in the present application may be a measured value of the interference impact or an estimated value of the interference impact.

[0014] In an exemplary embodiment, after determining the first performance parameter of the current SRS time domain resource configuration and the second performance parameter of the candidate SRS time domain resource configuration based on the first measurement information, the method further includes: when the target SRS time domain resource configuration does not exist in the candidate SRS time domain resource configuration, keeping the current SRS time domain resource configuration unchanged.

[0015] In an exemplary embodiment, before determining the first performance parameter of the current SRS time domain resource configuration and the second performance parameter of the candidate SRS time domain resource configuration according to the first measurement information, the method further includes: acquiring the first measurement information.

[0016] In an exemplary embodiment, obtaining the first measurement information includes: obtaining the total number of RRC connected users in the cell, the uplink benchmark spectrum efficiency of each user, the downlink benchmark spectrum efficiency of each user, the uplink spectrum efficiency weighting factor of each user, the downlink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on uplink performance, and the interference impact factor of SRS interference on downlink performance.

[0017] In an exemplary embodiment, after acquiring the first measurement information, the method further includes: calculating the first performance parameter or calculating the second performance parameter by the following formula:

[0018] G(f UL ,fDL )=a*f UL (NI)+b*f DL (NI) (1)

[0019]

[0020]

[0021] Where a+b=1, the G(f UL ,f DL ) is the first performance parameter or the second performance parameter, the RRC represents the total number of RRC connected users in the cell, and the SE ul (i) represents the uplink reference spectrum efficiency of user i, and the SE dl (i) represents the downlink reference spectrum efficiency of user i, β(i) represents the uplink spectrum efficiency weighting factor of user i, represents the downlink spectrum efficiency weighting factor of user i, the ξ ul (NI(i)) is the interference factor of SRS interference on uplink performance, and the ξ dl (NI(i)) is the interference impact factor of SRS interference on downlink performance.

[0022] In an exemplary embodiment, obtaining the first measurement information includes: obtaining the total number of RRC connected users in the cell, the impact factor of the uplink symbol number on the uplink system, the uplink baseline spectrum efficiency of each user, the uplink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on uplink performance, the impact factor of SRS capacity on uplink performance, the impact factor of SRS period on uplink performance, the downlink baseline spectrum efficiency of each user, the downlink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on downlink performance, the impact factor of SRS capacity on downlink performance, the SRS capacity refers to the number of users supporting the configuration of SRS, and the impact factor of SRS period on downlink performance.

[0023] In an exemplary embodiment, after acquiring the first measurement information, the method further includes: determining the first performance parameter or the second performance parameter using the following formula:

[0024] G(f UL ,f DL )=a*f UL +b*f DL (NI,Capability,SrsPeriod) (4)

[0025]

[0026]

[0027] Where a+b=1, the G(f UL ,f DL ) is the first performance parameter or the second performance parameter, the RRC represents the total number of RRC connected users in the cell, and the θ ul (UpSymNum) is the influence factor of the uplink symbol number on the uplink system. ul (i) represents the uplink reference spectrum efficiency of user i, β(i) represents the uplink spectrum efficiency weighting factor of user i, and ξ ul (NI(i)) is the interference factor of SRS interference on uplink performance, and the δ ul (Capability(i)) is the impact factor of SRS capacity on uplink performance. is the impact factor of the SRS period on the uplink performance, the SE dl (i) represents the downlink reference spectrum efficiency of user i, represents the downlink spectrum efficiency weighting factor of user i, the ξ dl (NI(i)) is the interference factor of SRS interference on downlink performance, and the δ dl (Capability(i)) is the impact factor of SRS capacity on downlink performance, where SRS capacity refers to the number of users supporting SRS configuration. is the impact factor of the SRS period on the downlink performance.

[0028] In an exemplary embodiment, obtaining the candidate SRS time domain resource configuration includes: obtaining all available SRS symbols; determining any one SRS symbol among all available SRS symbols as one of the candidate SRS time domain resource configurations; and determining any at least two SRS symbols among all available SRS symbols as one of the candidate SRS time domain resource configurations.

[0029] According to another embodiment of the present invention, a dynamic selection device for SRS time domain resources is provided, comprising: a first acquisition unit, used to acquire a current SRS time domain resource configuration and a candidate SRS time domain resource configuration, wherein the current SRS time domain resource configuration is a time domain symbol resource configuration currently being used; a determination unit, used to determine a first performance parameter of the current SRS time domain resource configuration and a second performance parameter of the candidate SRS time domain resource configuration based on first measurement information, wherein the first performance parameter is used to represent the system performance under the current SRS time domain resource configuration, and the second performance parameter is used to represent the system performance under the candidate SRS time domain resource configuration, and the first measurement information includes an interference impact factor on the SRS symbol; a replacement unit, used to replace the current SRS time domain resource configuration with an SRS time domain resource configuration in the target SRS time domain resource configuration when a target SRS time domain resource configuration exists in the candidate SRS time domain resource configuration, wherein the second performance parameter of the target SRS time domain resource configuration is greater than the product of the first performance parameter and a preset ratio, and the preset ratio is greater than 1.

[0030] In an exemplary embodiment, the device also includes: a maintaining unit for maintaining the current SRS time domain resource configuration unchanged after determining the first performance parameter of the current SRS time domain resource configuration and the second performance parameter of the candidate SRS time domain resource configuration based on the first measurement information, if the target SRS time domain resource configuration does not exist in the candidate SRS time domain resource configuration.

[0031] In an exemplary embodiment, the apparatus further includes: a second acquisition unit, configured to acquire the first measurement information before determining the first performance parameter of the current SRS time domain resource configuration and the second performance parameter of the candidate SRS time domain resource configuration according to the first measurement information.

[0032] In an exemplary embodiment, the second acquisition unit includes: a first acquisition module, used to obtain the total number of RRC connected users in the cell, the uplink benchmark spectrum efficiency of each user, the downlink benchmark spectrum efficiency of each user, the uplink spectrum efficiency weighting factor of each user, the downlink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on uplink performance, and the interference impact factor of SRS interference on downlink performance.

[0033] In an exemplary embodiment, the second acquisition unit further includes: a first calculation module, configured to calculate the first performance parameter or the second performance parameter by using the above formula 1 to formula 3 after acquiring the first measurement information.

[0034] In an exemplary embodiment, the second acquisition unit includes: a second acquisition module, which is used to acquire the total number of RRC connected users in the cell, the impact factor of the uplink symbol number on the uplink system, the uplink baseline spectrum efficiency of each user, the uplink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on uplink performance, the impact factor of SRS capacity on uplink performance, the impact factor of SRS period on uplink performance, the downlink baseline spectrum efficiency of each user, the downlink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on downlink performance, the impact factor of SRS capacity on downlink performance, the SRS capacity refers to the number of users supporting the configuration of SRS, and the impact factor of SRS period on downlink performance.

[0035] In an exemplary embodiment, the second acquisition unit further includes: a second calculation module, configured to determine the first performance parameter or the second performance parameter using the above formula 4 to formula 6 after acquiring the first measurement information.

[0036] In an exemplary embodiment, the first acquisition unit includes: a third acquisition module, used to acquire all available SRS symbols; a determination module, used to determine any one SRS symbol among all the available SRS symbols as one of the candidate SRS time domain resource configurations, and to determine any at least two SRS symbols among all the available SRS symbols as one of the candidate SRS time domain resource configurations.

[0037] According to yet another embodiment of the present invention, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the steps of any one of the above method embodiments when run.

[0038] According to yet another embodiment of the present invention, there is provided an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0039] Through the present invention, since the first performance parameter and the second performance parameter are calculated by the interference influence factor on the SRS symbol in the process of selecting the time domain resources, the influence of the difference in interference levels on different SRS symbols caused by the interference of the atmospheric waveguide and the like on the resource selection is taken into account, and on the basis of considering the difference in interference of different symbols, the performance of the SRS time domain resource allocation is comprehensively evaluated in combination with parameters such as the SRS available symbols, the SRS capacity, and the SRS period, therefore, the problem of low uplink and downlink system performance caused by the unreasonable selection of SRS time domain resources in the existing cells can be solved, thereby achieving the effect of improving the uplink and downlink system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a hardware structure block diagram of a mobile terminal according to a method for dynamically selecting SRS time domain resources according to an embodiment of the present invention;

[0041] Figure 2 is a flow chart of a method for dynamically selecting SRS time domain resources according to an embodiment of the present invention;

[0042] Figure 3 is a flow chart of a method for dynamically selecting SRS time domain resources according to an embodiment of the present invention;

[0043] Figure 4 is a structural block diagram of a dynamic selection device for SRS time domain resources according to an embodiment of the present invention;

[0044] Figure 5 is a structural block diagram of a dynamic selection device for SRS time domain resources according to an embodiment of the present invention;

[0045] Figure 6 is a structural block diagram of a dynamic selection device for SRS time domain resources according to an embodiment of the present invention;

[0046] Figure 7 It is a structural block diagram of a device for dynamically selecting SRS time domain resources according to an embodiment of the present invention. DETAILED DESCRIPTION

[0047] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and in combination with the embodiments.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0049] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 FIG. 1 is a hardware structure block diagram of a mobile terminal of a method for dynamically selecting SRS time domain resources according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown.

[0050] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the dynamic selection method of SRS time domain resources in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the mobile terminal via 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.

[0051] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0052] Figure 2 is a flow chart of a method for dynamically selecting SRS time domain resources according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0053] S202, obtaining a current SRS time domain resource configuration and a candidate SRS time domain resource configuration, wherein the current SRS time domain resource configuration is a time domain symbol resource configuration being used;

[0054] S204, determining, according to the first measurement information, a first performance parameter of the current SRS time domain resource configuration and a second performance parameter of the candidate SRS time domain resource configuration, wherein the first performance parameter is used to represent the system performance under the current SRS time domain resource configuration, the second performance parameter is used to represent the system performance under the candidate SRS time domain resource configuration, and the first measurement information includes an interference impact factor on an SRS symbol;

[0055] S206. When there is a target SRS time domain resource configuration in the candidate SRS time domain resource configuration, replace the current SRS time domain resource configuration with an SRS time domain resource configuration in the target SRS time domain resource configuration, wherein the second performance parameter of the target SRS time domain resource configuration is greater than the product of the first performance parameter and a preset ratio, and the preset ratio is greater than 1.

[0056] Among them, after determining the first performance parameter of the current SRS time domain resource configuration and the second performance parameter of the candidate SRS time domain resource configuration according to the first measurement information, the method also includes: when the target SRS time domain resource configuration does not exist in the candidate SRS time domain resource configuration, keeping the current SRS time domain resource configuration unchanged.

[0057] Wherein, before determining the first performance parameter of the current SRS time domain resource configuration and the second performance parameter of the candidate SRS time domain resource configuration according to the first measurement information, the method further includes: acquiring the first measurement information.

[0058] Among them, obtaining the first measurement information includes: obtaining the total number of RRC connected users in the cell, the uplink benchmark spectrum efficiency of each user, the downlink benchmark spectrum efficiency of each user, the uplink spectrum efficiency weighting factor of each user, the downlink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on uplink performance, and the interference impact factor of SRS interference on downlink performance.

[0059] After acquiring the first measurement information, the method further includes: calculating the first performance parameter or the second performance parameter by using the above formulas 1 to 3.

[0060] Among them, obtaining the first measurement information includes: obtaining the total number of RRC connected users in the cell, the impact factor of the uplink symbol number on the uplink system, the uplink baseline spectrum efficiency of each user, the uplink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on uplink performance, the impact factor of SRS capacity on uplink performance, the impact factor of SRS period on uplink performance, the downlink baseline spectrum efficiency of each user, the downlink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on downlink performance, the impact factor of SRS capacity on downlink performance, the SRS capacity refers to the number of users supporting the configuration of SRS, and the impact factor of SRS period on downlink performance.

[0061] After acquiring the first measurement information, the method further includes: using the above formula 4 to formula 6 to determine the first performance parameter or the second performance parameter.

[0062] Among them, the first measurement information in the present application may be the total number of RRC connected users in the cell, the uplink benchmark spectrum efficiency of each user, the downlink benchmark spectrum efficiency of each user, the uplink spectrum efficiency weighting factor of each user, the downlink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on uplink performance, and the interference impact factor of SRS interference on downlink performance. When calculating the first performance parameter, the value of the above-mentioned first measurement information may be a measured value or an estimated value. When calculating the second performance parameter, the value of the above-mentioned first measurement information may be a measured value or an estimated value.

[0063] Among them, the first measurement information in the present application can be the total number of RRC connected users in the cell, the impact factor of the uplink symbol number on the uplink system, the uplink baseline spectrum efficiency of each user, the uplink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on uplink performance, the impact factor of SRS capacity on uplink performance, the impact factor of SRS period on uplink performance, the downlink baseline spectrum efficiency of each user, the downlink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on downlink performance, the impact factor of SRS capacity on downlink performance, the SRS capacity refers to the number of users supporting the configuration of SRS, and the impact factor of SRS period on downlink performance. When calculating the first performance parameter, the value of the above-mentioned first measurement information can be a measured value or an estimated value. When calculating the second performance parameter, the value of the above-mentioned first measurement information can be a measured value or an estimated value.

[0064] Among them, obtaining the candidate SRS time domain resource configuration includes: obtaining all available SRS symbols; determining any one SRS symbol among all available SRS symbols as a candidate SRS time domain resource configuration; determining any at least two SRS symbols among all available SRS symbols as a candidate SRS time domain resource configuration.

[0065] Through the above steps, the problem of low uplink and downlink system performance caused by unreasonable selection of cell SRS time domain resources is solved, thereby achieving the effect of improving the uplink and downlink system performance.

[0066] The above-mentioned dynamic selection method of SRS time domain resources is explained below with reference to a specific example.

[0067] The core invention of the present invention is to evaluate the influence of various SRS time domain resource schemes on uplink and downlink system performance according to the interference conditions on different SRS symbols, and dynamically select SRS time domain symbols.

[0068] Among them, since the number of uplink symbols occupied by SRS and the number of SRS available symbols will also affect the system performance, in addition to considering the SRS interference on different symbols, the uplink performance and downlink performance will be comprehensively evaluated based on the number of uplink symbols occupied by SRS and the number of SRS available symbols, and the solution with the best comprehensive performance will be selected.

[0069] The evaluation function of the cell SRS resource is recorded as G(f UL ,f DL ), where f UL is the uplink performance evaluation function, which is related to the interference (NI) on the SRS symbol, the number of uplink symbols occupied by SRS, SRS capacity or SRS period, etc. Its expression is f UL (UpSymNum,NI,Capability,SrsPeriod); f DL is the downlink throughput evaluation function, which is related to the interference on the SRS symbol, SRS capacity or SRS period, and its expression is f DL (NI,Capability,SrsPeriod).

[0070] The method for dynamically selecting cell SRS time domain resources of the present invention includes the following steps: Figure 3 The following steps are shown:

[0071] S302, select an expression of the evaluation function according to different scenarios and system performance requirements. For example, in a system focusing on downlink performance, you can select f DL The weighting coefficient is much larger than f UL The weighted coefficients, interference NI, SRS capacity, SRS period, etc., on the uplink and downlink systems can be determined through simulation or field testing.

[0072] S304: Acquire a set of SRS time domain resource solutions for the candidate cells according to available SRS symbols.

[0073] T1: represents the current SRS time domain resource solution set;

[0074] T2: represents a set of other candidate SRS time domain resource solutions except the current SRS time domain resource solution.

[0075] S306, obtaining relevant measurement statistics, such as interference measurement on SRS symbols and basic statistics of the network. Preferably, the SRS capacity, SRS period and other information are determined according to the number of SRS symbols in various SRS time domain resource schemes in the T1 and T2 sets.

[0076] S308, based on the information obtained in S306, calculate the evaluation function f of various SRS time domain resource solutions in the T1 and T2 sets UL(UpSymNum,NI,Capability,SrsPeriod), f DL (NI,Capability,SrsPeriod) and G(f UL ,f DL ).

[0077] S310, if G(f UL ,f DL ) is greater than G(f) of the corresponding SRS time domain resource solution in alfa*T1 UL ,f DL ), then adjust the SRS time domain resources and select G(f UL ,f DL ) the largest solution, otherwise keep the current SRS time domain resource solution. Where alfa is the hysteresis factor, which can be determined by comprehensively considering system performance and reconfiguration overhead.

[0078] Compared with the prior art, the method of the present invention comprehensively evaluates the impact of interference on the uplink and downlink system performance based on the SRS symbols, and also comprehensively evaluates the impact on the uplink and downlink system performance based on basic statistical information of the network, the number of U subframe symbols occupied by SRS, SRS capacity and SRS period, and selects the cell SRS time domain resource allocation scheme with the highest spectrum efficiency, which can improve the performance of the system.

[0079] As an optional embodiment, the uplink and downlink system performance is evaluated mainly based on the interference levels on different SRS symbols.

[0080] Step 1: According to the attention paid to uplink and downlink performance in different scenarios, set the evaluation function and set G(f UL ,f DL )=a*f UL (NI)+b*f DL (NI).

[0081] in:

[0082]

[0083]

[0084] Wherein, a+b=1, in this embodiment, a=0.2, b=0.8;

[0085] 1)RRC indicates the total number of RRC connected users in the cell.

[0086] 2) SE ul (i) SE dl(i) represents the uplink reference spectrum efficiency and downlink reference spectrum efficiency of user i, respectively, which refers to the uplink spectrum efficiency and downlink spectrum efficiency of user i when NI = -110dBm, and can be obtained according to the uplink and downlink MCS and statistical information of the UE.

[0087] 3)β(i) and They respectively represent the uplink spectrum efficiency weighting factor and the downlink spectrum efficiency weighting factor of user i, which can be obtained according to the spectrum efficiency distribution and scheduling ratio of users in the network.

[0088] 4)ξ ul (t) is the impact factor of SRS interference on uplink performance, which can be determined by testing or simulation. In this embodiment, it is assumed that

[0089]

[0090] 5)ξ dl (t) is the impact factor of SRS interference on downlink performance, where the interference impact factor on downlink BF users can be obtained through simulation or testing, assuming that:

[0091] For BF users,

[0092] For non-BF users, ξ dl (t)=1.

[0093] Step 2: According to the total available SRS symbols, obtain a set of SRS time domain resource solutions for the candidate cells.

[0094] For TDD uplink and downlink ratio 2, the cell SRS time domain resource selection takes 5 ms as the reference period, and the total available SRS symbols are S1, S2, and U1.

[0095] S1 and S2 represent the first uplink symbol and the second uplink symbol of the S subframe, and U1 represents the last symbol of the U subframe.

[0096] The current SRS time domain resource solution set T1 = S1 + S2.

[0097] The candidate SRS time domain resource solution set T2 is:

[0098] T2(1)=S1+S2+U1, T2(2)=S1+U1, T2(3)=S2+U1, T2(4)=S1, T2(5)=S2, T2(6)=U1.

[0099] Step 3: Obtain relevant measurement statistics, including the interference of each symbol, basic statistical information of the network, and determine the information of each user for each SRS time domain resource solution, which mainly includes the following information:

[0100] The number of RRC connected users in the network, assuming there are 200 users in the network;

[0101] Obtain the interference situation on each SRS symbol;

[0102] Get the baseline spectrum efficiency SE of each UE in the network ul (i) and SE dl (i);

[0103] Obtain the weighting factor β(i) of each user according to the distribution of uplink SE in the network and the scheduling ratio;

[0104] Obtain the weighting factor for each user based on the allocation and scheduling ratio of downlink SE in the network

[0105] For the T1, T2(1) to T2(6) time domain resource allocation schemes, SRS resources are pre-allocated to the UE, and the SRS resource allocation status of each UE under each scheme is determined.

[0106] Step 4: Based on the information obtained in step 3, substitute the evaluation function determined in step 1 and calculate the evaluation function f corresponding to T1, T2(1)~T2(6) respectively. UL (NI), f DL (NI) and G(f UL ,f DL ).

[0107] Assume that the evaluation function G(f UL ,f DL ) values ​​are 300, 280, 270, 320, 240, 250, and 300 respectively.

[0108] Step 5: Assuming that alfa is 1.1, G(f UL ,f DL ) takes the largest value, which is 320, and G(f UL ,f DL ) is smaller than T1's G(f UL ,f DL ) takes the value of 1.1*300, so the SRS time domain symbol resource scheme corresponding to T1 is selected, that is, the current SRS time domain scheme remains unchanged.

[0109] As another example, the uplink and downlink system performance is comprehensively evaluated according to the interference levels on different SRS symbols, the number of uplink symbols occupied by SRS, and the number of SRS available symbols.

[0110] Step 1: According to the attention paid to uplink and downlink performance in different scenarios, set the evaluation function and set G(f UL ,f DL )=a*f UL +b*f DL (NI,Capability,SrsPeriod).

[0111] In the above, a+b=1, in this embodiment, a=0.4, b=0.6;

[0112] The uplink system performance is mainly related to the number of uplink available symbols excluding SRS symbols, SRS NI, SRS capacity, and SRS period.

[0113] f UL The expression of (UpSymNum, NI, Capability, SrsPeriod) is as follows:

[0114]

[0115] in:

[0116] RRC indicates the total number of RRC connected users in the cell.

[0117] θ ul (UpSymNum) is the influence factor of the uplink symbol number on the uplink system. Where UpSymNum is the number of uplink available symbols excluding SRS symbols, and TotalUpSym is the number of all available uplink symbols. When SRS occupies symbols of the U subframe, the number of uplink symbols will be reduced, which will affect the uplink throughput; when SRS occupies the S subframe, it will not occupy uplink symbols and will have no effect on the uplink throughput.

[0118] SE ul (i) represents the uplink benchmark spectrum efficiency of user i, which refers to the uplink spectrum efficiency of user i when UpSymNum=TotalUpSym, NI=-110dBm, SRS resources are configured and the SRS period is 5ms, which can be obtained according to the MCS or statistical information of the UE.

[0119] β(i) represents the uplink spectrum efficiency weighting factor of user i, which can be obtained according to the uplink spectrum efficiency distribution and uplink scheduling ratio of users in the network.

[0120] ξ ul (t) is the impact factor of SRS interference on uplink performance, which can be determined by testing or simulation. In this embodiment, it is assumed that

[0121]

[0122] δul (Capability(i)) is the impact factor of SRS capacity on uplink performance, assuming

[0123] For users who configure SRS, δ ul (Capability(i))=1;

[0124] For users without SRS, δ ul (Capability(i))=0.9.

[0125] is the impact factor of SRS period on uplink performance, assuming that uplink has no requirement on SRS period, that is,

[0126] The downlink system performance is mainly related to SRS NI, SRS capacity and SRS period. DL The expression of (NI,Capability,SrsPeriod) is as follows:

[0127]

[0128] in:

[0129] SE dl (i) represents the downlink benchmark spectrum efficiency of user i, which refers to the downlink spectrum efficiency of user i when the beamforming scheme is adopted, NI = -110dBm, SRS resources are configured and the SRS period is 5ms, which can be obtained according to the downlink channel quality or statistical information of the UE.

[0130] It represents the downlink spectrum efficiency weighting factor of user i, which is obtained based on the downlink spectrum efficiency distribution and downlink scheduling ratio of users in the network.

[0131] ξ dl (t) is the impact factor of SRS interference on downlink performance, where the interference impact factor on downlink BF users can be obtained through simulation or testing, assuming:

[0132] For BF users,

[0133] For non-BF users, ξ dl (t)=1.

[0134] δ dl (Capability(i)) is the impact factor of SRS capacity on downlink performance. SRS capacity refers to the number of users that can support SRS configuration.

[0135] For users who configure SRS, δ dl(Capability(i))=1;

[0136] For users without SRS, it is impossible to use the BF transmission scheme to obtain beamforming gain, δ dl (Capability(i)) is determined based on the performance loss of non-BF users relative to BF users, which can be predetermined through simulation or testing. Assume that δ dl (Capability(i))=0.8.

[0137] is the influence factor of the SRS period on the downlink performance, which is determined according to actual tests or simulations. In this embodiment, it is assumed that:

[0138]

[0139] Step 2: According to the total available SRS symbols, obtain a set of SRS time domain resource solutions for the candidate cells.

[0140] For TDD uplink and downlink ratio 2, the cell SRS time domain resource selection takes 5 ms as the reference period, and the total available SRS symbols are S1, S2, and U1.

[0141] S1 and S2 represent the first uplink symbol and the second uplink symbol of the S subframe, and U1 represents the last symbol of the U subframe.

[0142] The current SRS time domain resource solution set T1 = S1 + S2.

[0143] The candidate SRS time domain resource solution set T2 is:

[0144] T2(1)=S1+S2+U1, T2(2)=S1+U1, T2(3)=S2+U1, T2(4)=S1, T2(5)=S2, T2(6)=U1.

[0145] Step 3: Obtain relevant measurement statistics, including the interference of each symbol, basic statistics of the network, and determine the information of each user for each SRS time domain resource solution, including whether there are SRS resources, the symbol where the SRS resources are located, the period, etc. The specific information includes the following:

[0146] The number of RRC connected users in the network, assuming there are 100 users in the network;

[0147] Obtain the interference situation on each SRS symbol;

[0148] Get the baseline spectrum efficiency SE of each UE in the network ul (i) and SE dl (i);

[0149] Obtain the weighting factor β(i) of each user according to the distribution of uplink SE in the network and the scheduling ratio;

[0150] Obtain the weighting factor for each user based on the allocation and scheduling ratio of downlink SE in the network

[0151] For each time domain resource T1, T2(1)~T2(6), obtain the uplink available symbols under each scheme, wherein for the uplink and downlink ratio 2 and the special subframe ratio 7 in this embodiment, the uplink symbol UpSymNum of each subframe radio frame corresponding to T1, T2(1)~T2(6) is 28, 27, 27, 28, 28, 28 respectively; the total available uplink symbols are 28.

[0152] For the T1, T2(1) to T2(6) time domain resource allocation schemes, SRS resources are pre-allocated to the UE, and the SRS resource allocation of each UE under each scheme is determined, including whether the UE has SRS, the SRS period, and the NI of the symbol where the SRS is located.

[0153] Step 4: Based on the information obtained in step 3, substitute the evaluation function determined in step 1 and calculate the evaluation function f corresponding to T1, T2(1)~T2(6) respectively. UL (UpSymNum,NI,Capability,SrsPeriod), f DL (NI,Capability,SrsPeriod) and G(f UL ,f DL )=a*f UL +b*f DL (NI,Capability,SrsPeriod).

[0154] Where a+b=1

[0155] Assume that the evaluation function G(f UL ,f DL ) values ​​are 260, 280, 270, 350, 240, 250, and 300 respectively.

[0156] Step 5: Assuming that alfa is 1.1, G(f UL ,f DL ) takes the largest value, which is 350, and G(f UL ,f DL ) is greater than T1's G(f UL ,f DL) takes the value of 1.1*260, so the SRS time domain symbol resource scheme corresponding to T2(3) is selected.

[0157] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0158] In this embodiment, a dynamic selection device for SRS time domain resources is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0159] Figure 4 is a structural block diagram of a dynamic selection device for SRS time domain resources according to an embodiment of the present invention, such as Figure 4 As shown, the device comprises:

[0160] A first acquisition unit 402 is configured to acquire a current SRS time domain resource configuration and a candidate SRS time domain resource configuration, wherein the current SRS time domain resource configuration is a time domain symbol resource configuration being used;

[0161] A determining unit 404 is configured to determine, according to the first measurement information, a first performance parameter of the current SRS time domain resource configuration and a second performance parameter of the candidate SRS time domain resource configuration, wherein the first performance parameter is used to represent the system performance under the current SRS time domain resource configuration, the second performance parameter is used to represent the system performance under the candidate SRS time domain resource configuration, and the first measurement information includes an interference impact factor on an SRS symbol;

[0162] The replacement unit 406 is used to replace the current SRS time domain resource configuration with an SRS time domain resource configuration in the target SRS time domain resource configuration when there is a target SRS time domain resource configuration in the candidate SRS time domain resource configuration, wherein the second performance parameter of the target SRS time domain resource configuration is greater than the product of the first performance parameter and a preset ratio, and the preset ratio is greater than 1.

[0163] Figure 5 is a structural block diagram of a dynamic selection device for SRS time domain resources according to an embodiment of the present invention, such as Figure 5 As shown, the device includes Figure 4 All units shown plus:

[0164] The maintaining unit 502 is used to maintain the current SRS time domain resource configuration unchanged after determining the first performance parameter of the current SRS time domain resource configuration and the second performance parameter of the candidate SRS time domain resource configuration according to the first measurement information, when the target SRS time domain resource configuration does not exist in the candidate SRS time domain resource configuration.

[0165] Figure 6 is a structural block diagram of a dynamic selection device for SRS time domain resources according to an embodiment of the present invention, such as Figure 6 As shown, the device includes Figure 4 All units shown plus:

[0166] The second acquisition unit 602 is used to acquire the first measurement information before determining the first performance parameter of the current SRS time domain resource configuration and the second performance parameter of the candidate SRS time domain resource configuration according to the first measurement information.

[0167] Figure 7 is a structural block diagram of a dynamic selection device for SRS time domain resources according to an embodiment of the present invention, such as Figure 7 As shown, the device includes Figure 4 In addition to all the units shown, the first acquisition unit also includes:

[0168] The third acquisition module 702 is used to acquire all available SRS symbols;

[0169] The determination module 704 is used to determine any one of the all available SRS symbols as one of the candidate SRS time domain resource configurations, and to determine any at least two of the all available SRS symbols as one of the candidate SRS time domain resource configurations. It should be noted that the above modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to this: the above modules are all located in the same processor; or the above modules are located in different processors in any combination.

[0170] An embodiment of the present invention further provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

[0171] In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0172] An embodiment of the present invention further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0173] In an exemplary embodiment, the electronic device may 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.

[0174] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0175] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0176] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for dynamically selecting SRS time domain resources, characterized in that: include: Acquire a current SRS time domain resource configuration and a candidate SRS time domain resource configuration, wherein the current SRS time domain resource configuration is a time domain symbol resource configuration being used; Determine, according to the first measurement information, a first performance parameter of the current SRS time domain resource configuration and a second performance parameter of the candidate SRS time domain resource configuration, wherein the first performance parameter is used to represent the system performance under the current SRS time domain resource configuration, the second performance parameter is used to represent the system performance under the candidate SRS time domain resource configuration, and the first measurement information includes an interference impact factor on an SRS symbol; In a case where there is a target SRS time domain resource configuration in the candidate SRS time domain resource configuration, the current SRS time domain resource configuration is replaced with an SRS time domain resource configuration in the target SRS time domain resource configuration, wherein the second performance parameter of the target SRS time domain resource configuration is greater than the product of the first performance parameter and a preset ratio, and the preset ratio is greater than 1.

2. The method according to claim 1, characterized in that After determining the first performance parameter of the current SRS time domain resource configuration and the second performance parameter of the candidate SRS time domain resource configuration according to the first measurement information, the method further includes: In a case where the target SRS time domain resource configuration does not exist in the candidate SRS time domain resource configuration, the current SRS time domain resource configuration is kept unchanged.

3. The method according to claim 1, characterized in that Before determining the first performance parameter of the current SRS time domain resource configuration and the second performance parameter of the candidate SRS time domain resource configuration according to the first measurement information, the method further includes: The first measurement information is acquired.

4. The method according to claim 3, characterized in that Acquiring the first measurement information includes: Obtain the total number of RRC connected users in the cell, the uplink benchmark spectrum efficiency of each user, the downlink benchmark spectrum efficiency of each user, the uplink spectrum efficiency weighting factor of each user, the downlink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on uplink performance, and the interference impact factor of SRS interference on downlink performance.

5. The method according to claim 4, characterized in that After acquiring the first measurement information, the method further includes: The first performance parameter or the second performance parameter is calculated by the following formula: G(f UL ,f DL )=a*f UL (IN)+b*f DL (IN) (1) Where a+b=1, the G(f UL ,f DL ) is the first performance parameter or the second performance parameter, the RRC represents the total number of RRC connected users in the cell, and the SE ul (i) represents the uplink reference spectrum efficiency of user i, and the SE dl (i) represents the downlink reference spectrum efficiency of user i, β(i) represents the uplink spectrum efficiency weighting factor of user i, represents the downlink spectrum efficiency weighting factor of user i, the ξ ul (NI(i)) is the interference factor of SRS interference on uplink performance, and the ξ dl (NI(i)) is the interference impact factor of SRS interference on downlink performance.

6. The method according to claim 3, characterized in that Acquiring the first measurement information includes: Obtain the total number of RRC connected users in the cell, the impact factor of the number of uplink symbols on the uplink system, the uplink baseline spectrum efficiency of each user, the uplink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on uplink performance, the impact factor of SRS capacity on uplink performance, the impact factor of SRS period on uplink performance, the downlink baseline spectrum efficiency of each user, the downlink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on downlink performance, the impact factor of SRS capacity on downlink performance, the SRS capacity refers to the number of users supporting the configuration of SRS, and the impact factor of SRS period on downlink performance.

7. The method according to claim 6, characterized in that After acquiring the first measurement information, the method further includes: The first performance parameter or the second performance parameter is determined using the following formula: G(f UL ,f DL )=a*f UL +b*f DL (NI,Capability,SrsPeriod) (4) Where a+b=1, the G(f UL ,f DL ) is the first performance parameter or the second performance parameter, the RRC represents the total number of RRC connected users in the cell, and the θ ul (UpSymNum) is the influence factor of the uplink symbol number on the uplink system. ul (i) represents the uplink reference spectrum efficiency of user i, β(i) represents the uplink spectrum efficiency weighting factor of user i, and ξ ul (NI(i)) is the interference factor of SRS interference on uplink performance, and the δ ul (Capability(i)) is the impact factor of SRS capacity on uplink performance. is the impact factor of the SRS period on the uplink performance, the SE dl (i) represents the downlink reference spectrum efficiency of user i, represents the downlink spectrum efficiency weighting factor of user i, the ξ dl (NI(i)) is the interference factor of SRS interference on downlink performance, and the δ dl (Capability(i)) is the impact factor of SRS capacity on downlink performance, where SRS capacity refers to the number of users supporting SRS configuration. is the impact factor of the SRS period on the downlink performance.

8. The method according to any one of claims 1 to 7, characterized in that: Acquiring the candidate SRS time domain resource configuration includes: Get all available SRS symbols; Determine any one SRS symbol among all the available SRS symbols as one of the candidate SRS time domain resource configurations; Among all the available SRS symbols, any at least two SRS symbols are determined as one of the candidate SRS time-domain resource configurations.

9. A dynamic selection device for SRS time domain resources, characterized in that: include: A first acquisition unit is used to acquire a current SRS time domain resource configuration and a candidate SRS time domain resource configuration, wherein the current SRS time domain resource configuration is a time domain symbol resource configuration being used; a determining unit, configured to determine, according to first measurement information, a first performance parameter of the current SRS time domain resource configuration and a second performance parameter of the candidate SRS time domain resource configuration, wherein the first performance parameter is used to represent the system performance under the current SRS time domain resource configuration, the second performance parameter is used to represent the system performance under the candidate SRS time domain resource configuration, and the first measurement information includes an interference impact factor on an SRS symbol; A replacement unit is used to replace the current SRS time domain resource configuration with an SRS time domain resource configuration in the target SRS time domain resource configuration when there is a target SRS time domain resource configuration in the candidate SRS time domain resource configuration, wherein the second performance parameter of the target SRS time domain resource configuration is greater than the product of the first performance parameter and a preset ratio, and the preset ratio is greater than 1.

10. The device according to claim 9, characterized in that The device also includes: A maintaining unit is used to keep the current SRS time domain resource configuration unchanged after determining the first performance parameter of the current SRS time domain resource configuration and the second performance parameter of the candidate SRS time domain resource configuration according to the first measurement information, when the target SRS time domain resource configuration does not exist in the candidate SRS time domain resource configuration.

11. The device according to claim 9, characterized in that The device also includes: The second acquisition unit is used to acquire the first measurement information before determining the first performance parameter of the current SRS time domain resource configuration and the second performance parameter of the candidate SRS time domain resource configuration according to the first measurement information.

12. The device according to claim 11, characterized in that The second acquiring unit includes: The first acquisition module is used to obtain the total number of RRC connected users in the cell, the uplink benchmark spectrum efficiency of each user, the downlink benchmark spectrum efficiency of each user, the uplink spectrum efficiency weighting factor of each user, the downlink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on uplink performance, and the interference impact factor of SRS interference on downlink performance.

13. The device according to claim 11, characterized in that The second acquiring unit includes: The second acquisition module is used to obtain the total number of RRC connected users in the cell, the impact factor of the uplink symbol number on the uplink system, the uplink baseline spectrum efficiency of each user, the uplink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on uplink performance, the impact factor of SRS capacity on uplink performance, the impact factor of SRS period on uplink performance, the downlink baseline spectrum efficiency of each user, the downlink spectrum efficiency weighting factor of each user, the interference impact factor of SRS interference on downlink performance, the impact factor of SRS capacity on downlink performance, the SRS capacity refers to the number of users supporting the configuration of SRS, and the impact factor of SRS period on downlink performance.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program is configured to execute the method according to any one of claims 1 to 8 when executed.

15. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to run the computer program to perform the method according to any one of claims 1 to 8.

Images