Reference signal configuration method and device, terminal, base station and medium

Abstract

The invention provides a reference signal configuration method and device, a terminal, a base station and a medium, and relates to the technical field of communication. The method comprises: receiving a reference signal resource configuration from a base station, the reference signal resource configuration comprising a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal meet the following conditions: the frequency domain bandwidth of the first reference signal is smaller than the frequency domain bandwidth of the second reference signal, and the frequency domain density of the first reference signal is greater than the frequency domain density of the second reference signal; and receiving the first reference signal and the second reference signal according to the reference signal resource configuration. According to the scheme of the invention, the problem that the reference signal occupies too many resources when a terminal with a high synchronization precision requirement exists in the system is solved.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a reference signal configuration method, device, terminal, base station and medium. Background Art

[0002] In order to improve the spectrum efficiency, the communication system introduces super-Nyquist technology, such as time domain waveform overlapping multiplexing (such as Faster than Nyquist (FTN), Overlapped Time Division Multiplexing (OVTDM)), Spectrally efficient frequency division multiplexing (SE-FDM), etc. The above transmission technology is to improve the spectrum efficiency through asynchronous transmission and oversampling at the receiving end, but when matching filtering and oversampling are performed on the received signal, correlated noise will be generated. Therefore, the extra bandwidth brought by the non-zero roll-off factor is used to improve the capacity of the super-Nyquist transmission system, and its spectrum efficiency cannot exceed the Shannon limit.

[0003] In order to make up for the shortcomings of the super-Nyquist transmission system and improve the spectrum efficiency, a new MIMO solution is introduced. This solution needs to improve the downlink synchronization accuracy to the sampling point (group) level. In the traditional MIMO system, the Tracking Reference Signal (TRS) provides symbol-level time and frequency synchronization in the RRC connection state. TRS is a specially configured CSI-RS. The terminal continuously tracks and compensates for time deviation and frequency deviation by measuring TRS, thereby achieving time and frequency synchronization. Figure 1 As shown, in the frequency domain, the frequency domain density of TRS is fixed to 3, that is, there are 3 REs for TRS in each RB; in the time domain, there are 2 non-zero power TRS resources in each time slot.

[0004] In order to improve the downlink synchronization accuracy, the simple approach is to increase the bandwidth of TRS and improve the time resolution. However, as TRS is the reference signal with the most dense frequency domain configuration, directly expanding the bandwidth occupied by TRS according to the frequency domain density of 3 will occupy more resources. Not all terminals in the communication system support the new MIMO solution. If TRS is configured according to the frequency domain density of 3, it will cause a certain degree of resource waste. Summary of the invention

[0005] The purpose of the present invention is to provide a reference signal configuration method, device, terminal, base station and medium, which solves the problem that the reference signal occupies too many resources in the scenario where there are terminals with high synchronization accuracy requirements in the communication system.

[0006] To achieve the above object, an embodiment of the present invention provides a reference signal configuration method, which is applied to a terminal and includes:

[0007] Receiving a reference signal resource configuration from a base station, the reference signal resource configuration comprising: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfying: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal;

[0008] According to the reference signal resource configuration, the first reference signal and the second reference signal are received.

[0009] To achieve the above object, an embodiment of the present invention provides a reference signal configuration method, which is applied to a base station, including:

[0010] Sending a reference signal resource configuration to a terminal, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, where the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal;

[0011] The first reference signal and the second reference signal are sent according to the reference signal resource configuration.

[0012] To achieve the above object, an embodiment of the present invention provides a reference signal configuration device, applied to a terminal, including:

[0013] A first receiving module is configured to receive a reference signal resource configuration from a base station, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, where the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal;

[0014] A transmission module is used to receive the first reference signal and the second reference signal according to the reference signal resource configuration.

[0015] To achieve the above object, an embodiment of the present invention provides a reference signal configuration device, which is applied to a base station, including:

[0016] A first sending module is configured to send a reference signal resource configuration to a terminal, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, where the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal;

[0017] A transmission module is used to send the first reference signal and the second reference signal according to the reference signal resource configuration.

[0018] To achieve the above object, an embodiment of the present invention provides a terminal, including: a transceiver and a processor;

[0019] The transceiver is used to receive a reference signal resource configuration from a base station, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, where the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal;

[0020] The processor is configured to receive the first reference signal and the second reference signal according to the reference signal resource configuration.

[0021] To achieve the above object, an embodiment of the present invention provides a base station, including: a transceiver and a processor;

[0022] The transceiver is used to send a reference signal resource configuration to a terminal under the control of the processor, wherein the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, wherein the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal; and,

[0023] The first reference signal and the second reference signal are sent according to the reference signal resource configuration.

[0024] To achieve the above objective, an embodiment of the present invention provides a readable storage medium having a program or instruction stored thereon, wherein the program or instruction, when executed by a processor, implements the steps in the above reference signal configuration method.

[0025] The beneficial effects of the above technical solution of the present invention are as follows:

[0026] The terminal of the embodiment of the present invention receives a reference signal resource configuration from a base station, and the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, and the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal meet: the frequency domain bandwidth of the first reference signal is less than the frequency domain bandwidth of the second reference signal, and the frequency domain density of the first reference signal is greater than the frequency domain density of the second reference signal; the terminal receives the first reference signal and the second reference signal according to the reference signal resource configuration. The base station configures the first reference signal and the second reference signal with different frequency domain bandwidths and different frequency domain densities for the terminal, and the terminal can select a reference signal that meets the requirements based on the synchronization accuracy requirement or the synchronization correction requirement. For example, when the synchronization accuracy requirement is low, a reference signal with a small frequency domain bandwidth is selected, when the synchronization accuracy requirement is high, a reference signal with a large frequency domain bandwidth is selected, when the synchronization correction requirement is low, a reference signal with a low frequency domain density is selected, and when the synchronization correction requirement is high, a reference signal with a high frequency domain density is selected. In this way, the first reference signal and the second reference signal are flexibly configured to meet the synchronization requirements of different terminals without occupying additional wireless resources, thereby avoiding unnecessary waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of resource mapping pattern of TRS in the prior art;

[0028] Figure 2 This is a flowchart of a reference signal configuration method on a terminal side according to an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of resource mapping of an initial reference signal according to an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of resource mapping of a first reference signal and a second reference signal according to an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of frequency domain configuration mapping of a first reference signal and a second reference signal according to an embodiment of the present invention;

[0032] Figure 6 This is a flowchart of a reference signal configuration method at a base station side according to an embodiment of the present invention;

[0033] Figure 7 Schematic diagram of the module structure of a terminal according to an embodiment of the present invention;

[0034] Figure 8 A schematic diagram of the module structure of a base station according to an embodiment of the present invention;

[0035] Fig. 9 is a structural block diagram of a terminal according to an embodiment of the present invention;

[0036] Fig.10 is a structural block diagram of a base station according to an embodiment of the present invention;

[0037] Fig.11 A terminal structure diagram of another embodiment of the present invention;

[0038] Fig.12 This is a structural diagram of a base station according to another embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0040] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0041] In various embodiments of the present invention, it should be understood that the size of the serial numbers of the following processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0042] Additionally, the terms "system" and "network" are often used interchangeably herein.

[0043] In the embodiments provided in this application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, but B can also be determined according to A and / or other information.

[0044] like Figure 2 As shown, a reference signal configuration method according to an embodiment of the present invention is applied to a terminal, including:

[0045] Step 21: Receive a reference signal resource configuration from a base station, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal.

[0046] The frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: the frequency domain bandwidth of the first reference signal is smaller than the frequency domain bandwidth of the second reference signal, and the frequency domain density of the first reference signal is greater than the frequency domain density of the second reference signal. The larger the frequency domain bandwidth, the higher the synchronization accuracy requirement that can be met, and the smaller the frequency domain bandwidth, the lower the synchronization accuracy requirement that can be met. The larger the frequency domain density, the higher the synchronization correction requirement that can be met, and the smaller the frequency domain density, the lower the synchronization correction requirement that can be met. The synchronization correction requirement can be represented by the synchronization correction locking range.

[0047] In addition, the reference signal of the embodiment of the present invention is a downlink reference signal for synchronization, such as CSI-RS, TRS and synchronization signal block SSB, etc. The embodiment of the present invention only uses TRS as an example, and other reference signal types can also be configured in a similar implementation manner to achieve the same technical effect.

[0048] Step 22: Receive the first reference signal and the second reference signal according to the reference signal resource configuration.

[0049] A first reference signal is received according to a resource configuration (such as a frequency domain configuration) of a first reference signal in the reference signal resource configuration; and a second reference signal is received according to a resource configuration (such as a frequency domain configuration) of a second reference signal in the reference signal resource configuration.

[0050] When the terminal is synchronizing, if the frequency domain configuration of the first reference signal meets the synchronization accuracy requirement or the synchronization correction requirement, downlink synchronization is performed based on the first reference signal; if the frequency domain configuration of the second reference signal meets the synchronization accuracy requirement or the synchronization correction requirement, downlink synchronization is performed based on the second reference signal.

[0051] Optionally, before step 21, the reference signal configuration method further includes: receiving an initial reference signal resource configuration from the base station; when the initial reference signal resource configuration does not meet the synchronization accuracy requirement or the synchronization correction requirement, sending a first parameter and / or a second parameter to the base station; wherein the first parameter is used to indicate the synchronization accuracy requirement, and the second parameter is used to indicate the synchronization correction requirement. That is, when the initial reference signal resource configuration does not meet the terminal transmission requirement, the terminal sends the first parameter and / or the second parameter. The first parameter is used for the terminal to report its synchronization accuracy requirement when the synchronization accuracy provided by the initial reference signal resource configuration does not meet the transmission requirement; the second parameter is used for the terminal to report its synchronization correction locking range requirement when the synchronization correction locking range provided by the initial reference signal resource configuration does not meet the transmission requirement.

[0052] The initial reference signal resource configuration in the embodiment of the present invention may be a traditional reference signal resource configuration. Taking TRS configuration as an example, Figure 3 As shown, the initial reference signal resource configuration indicates that there are 2 TRS resources in each time slot, and the 2 TRS resources occupy exactly the same frequency domain bandwidth and frequency domain density. That is, after the initial reference signal resource configuration indicates 2 reference signal resources with the same frequency domain bandwidth and the same frequency domain density in each time slot, the terminal calculates the synchronization accuracy and synchronization correction locking range that can be provided by the initial reference signal. If the terminal has a higher synchronization accuracy requirement and / or synchronization correction locking range, the terminal reports its new synchronization accuracy requirement and / or synchronization correction locking range requirement, and the base station sends a new reference signal resource configuration according to the requirements reported by the terminal, i.e., the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal.

[0053] Specifically, assume that a terminal in a cell where a base station working in the FR1 frequency band is located has a bandwidth part BWP configured by the base station for the cell with a total of 48 resource blocks RB, and the starting physical resource block PRB0 of the BWP is 12 RBs away from the starting common resource block CRB0. Figure 3 As shown, in the initial state, the base station sends the initial reference signal resource configuration to the terminal, which is jointly represented by the following parameters:

[0054] Starting RB=24

[0055] NrofRBs_1=24

[0056] Density_1=1

[0057] K0=2

[0058] L0=4

[0059] L1=8

[0060] That is, the starting RB number of the initial reference signal is 24, corresponding to PRB12 in the BWP. The frequency domain bandwidth of the initial reference signal is 24 RBs, and there is one initial reference signal on each RB, located on the subcarrier numbered 2. The time domain of the initial reference signal is located on the 5th symbol (symbol numbered 4) and the 9th symbol (symbol numbered 8) of a time slot.

[0061] After measurement, the terminal found that the initial reference signal can provide a synchronization accuracy of 32 sampling points and a synchronization correction lock range of 40 sampling points. However, the current maximum synchronization accuracy required by the terminal is 20 sampling points, and the minimum synchronization correction lock range requires 128 sampling points. Therefore, the initial reference signal resource configuration cannot meet the terminal's needs. At this time, the terminal reports its synchronization accuracy requirements and synchronization correction lock range requirements to the base station.

[0062] Optionally, the reference signal resource configuration in the embodiment of the present invention further includes: a time domain configuration of a first reference signal and a time domain configuration of a second reference signal, wherein the time domain configuration of the first reference signal and the time domain configuration of the second reference signal satisfy at least one of the following:

[0063] The first reference signal and the second reference signal are located in the same time slot; that is, the first reference signal and the second reference signal need to be configured to appear at least once in each time slot, that is, the reference signal pattern contains two types of periodic synchronization reference signal (first reference signal and second reference signal) resources, and the two types of reference signal resources appear once in each time slot. The first reference signal occupies a small bandwidth and high density in the frequency domain, and is used to provide a higher synchronization correction locking range and a certain synchronization accuracy; the second reference signal occupies a large bandwidth and low density in the frequency domain, and is used to provide a higher synchronization accuracy.

[0064] The first reference signal and the second reference signal each occupy one symbol, that is, each reference signal resource occupies one symbol in the time domain, the first reference signal occupies one symbol, and the second reference signal occupies one symbol;

[0065] The first reference signal and the second reference signal do not occupy the same symbol, that is, different types of reference signal resources cannot be located in the same symbol in the same time slot. Figure 4 As shown, the first reference signal is located at the 5th symbol (symbol 4) of a time slot, and the second reference signal is located at the 9th symbol (symbol 8) of a time slot.

[0066] In addition, the front and back positions of the time domain symbols where the first reference signal and the second reference signal are located in each time slot should be consistent, or they can be inconsistent. That is, the front and back order of the first reference signal and the second reference signal in different time slots can be kept fixed or flexibly configured, and the embodiments of the present invention do not limit this.

[0067] Optionally, the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal further satisfy at least one of the following:

[0068] The frequency domain bandwidth of the first reference signal is a subset of the frequency domain bandwidth of the second reference signal, that is, the bandwidth where the frequency domain of the first reference signal is located should be a subset of the bandwidth where the frequency domain of the second reference signal is located;

[0069] The first reference signal is configured on the first subcarrier in the frequency domain bandwidth of the first reference signal, and the first subcarrier corresponds to the subcarrier where the second reference signal is located, that is, in the bandwidth corresponding to the frequency domain of the first reference signal, the first reference signal must exist at the position corresponding to the subcarrier where the second reference signal is located. Figure 5As shown, in the bandwidth where the first reference signal with a smaller bandwidth is located, the first reference signal with a smaller bandwidth must exist at the subcarrier position corresponding to the subcarrier where the second reference signal with a larger bandwidth is located to ensure the basic frequency domain correction function.

[0070] Taking TRS configuration as an example, the resource configuration of the first reference signal and the second reference signal in the embodiment of the present invention is as follows: Figure 4 and 5 Specifically, the resource configuration of the first reference signal is as follows, which is jointly represented by the following parameters:

[0071] Starting RB=24

[0072] NrofRBs_2=24

[0073] Density_2=3

[0074] K2=2

[0075] L2=4

[0076] That is, the starting RB number of the first reference signal is 24, corresponding to PRB12 in the BWP. The frequency domain bandwidth of the first reference signal is 24 RBs, and there are 3 first-class synchronization reference signals on each RB, which are located on subcarriers numbered 2, 6, and 10 respectively. The time domain of the first reference signal is located on the symbol numbered 4.

[0077] Similarly, the resource configuration of the second reference signal can be jointly represented by the following parameters:

[0078] Starting RB=12

[0079] NrofRBs_3=48

[0080] Density_3=1 / 4

[0081] Enumerated PRBs mod 4 = 0

[0082] L3=8

[0083] K3=6

[0084] At this time, the starting RB number of the second reference signal is 12, corresponding to PRB0 in the BWP. The frequency domain bandwidth of the second signal is 48 RBs, which occupies the entire BWP. The frequency domain density of the second reference signal is 0.25, that is, only 1 RB in every 4 RBs is configured with the second reference signal, specifically located on the RB with PRBs mod 4=0, that is, on the RBs numbered PRB0, PRB4, PRB8... In each RB configured with the second reference signal, the RE where the reference signal used for synchronization is located is located on the subcarrier numbered 6, and the time domain of the second reference signal is located on the symbol numbered 8.

[0085] like Figure 5 As shown, the first reference signal occupies a total of 24 RBs and is located in the middle of the BWP; the second reference signal occupies a total of 48 RBs and is located in the entire BWP.

[0086] Optionally, before step 21, the method further includes: sending capability information to the base station, where the capability information is used to indicate that the terminal supports the reference signal resource configuration, that is, the capability information indicates whether the terminal supports the new MIMO transmission scheme.

[0087] The sending of the capability information to the base station includes: sending the capability information to the base station through radio resource control RRC signaling, a preamble of initial access, message 3 of initial access, or message A of initial access. Specifically, the reporting method of the capability information includes but is not limited to: reporting as UE capability in RRC signaling; implicitly reporting it as a sequence number or group of a preamble at initial access; reporting as the content of Msg3 / MsgA PUSCH at initial access, etc.

[0088] Optionally, after step 21, the method further includes: determining a first synchronization accuracy according to the frequency domain configuration of the first reference signal; and determining a second synchronization accuracy according to the frequency domain configuration of the second reference signal.

[0089] Correspondingly, after step 22, it also includes: determining to use a target reference signal for synchronization according to the relationship between the first synchronization accuracy, the second synchronization accuracy and the synchronization accuracy requirement, the target reference signal being at least one of the first reference signal and the second reference signal.

[0090] That is to say, the terminal calculates the synchronization accuracy provided by the first reference signal and the second reference signal according to their frequency domain bandwidths; the terminal then compares its synchronization accuracy requirement with the synchronization accuracy that can be provided by the first reference signal and the second reference signal, and chooses to use the first reference signal or the second reference signal for synchronization based on the comparison result.

[0091] Specifically, determining to use a target reference signal for synchronization according to a relationship among the first synchronization accuracy, the second synchronization accuracy, and the synchronization accuracy requirement includes:

[0092] If the first synchronization accuracy is greater than the synchronization accuracy requirement, it is determined to use the first reference signal for synchronization. That is to say, if the synchronization accuracy requirement is less than or equal to the synchronization accuracy of the first reference signal, the terminal uses the first reference signal to complete the two functions of synchronization calibration and synchronization deviation correction;

[0093] If the first synchronization accuracy is not greater than the synchronization accuracy requirement, it is determined to use the first reference signal and the second reference signal for synchronization, that is, if the synchronization accuracy requirement is greater than the synchronization accuracy of the first reference signal, the terminal uses the second reference signal to complete synchronization calibration and uses the first reference signal to complete synchronization correction. Then, the subcarrier where the first reference signal and the second reference signal coexist is used to complete frequency domain correction.

[0094] The first reference signal and the second reference signal are configured as follows Figure 4 As shown, the maximum synchronization accuracy required by the terminal is 20 sampling points, and the minimum synchronization correction locking range requires 128 sampling points. For example, the first reference signal can provide the synchronization accuracy of 32 sampling points corresponding to the time interval, and the synchronization correction locking range is 128 sampling points. The second reference signal can provide a synchronization accuracy of 16 sampling points. The current UE's synchronization accuracy requirement is 20 sampling points. Compared with the synchronization accuracy of the two reference signals, it can be seen that the synchronization accuracy requirement is between the two. Therefore, after the current UE receives the synchronization reference signal in each time slot, it uses the second reference signal in symbol 8 for synchronization calibration, uses the first reference signal in symbol 4 for symbol correction, and uses the subcarrier numbered 6 in PRB12, PRB16, PRB20, PRB24, PRB28, and PRB32 to complete the frequency correction, thereby completing the new MIMO data reception process.

[0095] The terminal in an embodiment of the present invention receives resource configuration of the first reference signal and the second reference signal, and selects a suitable reference signal for reception based on synchronization accuracy requirements or synchronization correction requirements. When meeting different synchronization requirements, no additional wireless resources are occupied, thereby avoiding unnecessary waste of resources.

[0096] The reference signal configuration method of the embodiment of the present invention is introduced above from the terminal side. The embodiment of the reference signal configuration method on the base station side will be further described below with reference to the accompanying drawings.

[0097] like Figure 6 As shown, an embodiment of the present invention provides a reference signal configuration method, which is applied to a base station. The method includes but is not limited to the following steps:

[0098] Step 61: Send a reference signal resource configuration to the terminal, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, where the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal.

[0099] Step 62: Send the first reference signal and the second reference signal according to the reference signal resource configuration.

[0100] Optionally, the reference signal configuration method also includes: sending an initial reference signal resource configuration to the terminal; receiving a first parameter and / or a second parameter from the terminal; after receiving the first parameter and / or the second parameter, sending the reference signal resource configuration to the terminal; that is, the base station sends the resource configuration of the first reference signal and the second reference signal to the terminal based on the first parameter and / or the second parameter to replace the initial reference signal resource configuration.

[0101] Among them, the first parameter is used to indicate the synchronization accuracy requirement sent by the terminal when the initial reference signal resource configuration does not meet the synchronization accuracy requirement, and the second parameter is used to indicate the synchronization correction requirement sent by the terminal when the initial reference signal resource configuration does not meet the synchronization correction requirement.

[0102] Optionally, the reference signal resource configuration further includes: a time domain configuration of a first reference signal and a time domain configuration of a second reference signal, and the time domain configuration of the first reference signal and the time domain configuration of the second reference signal satisfy at least one of the following:

[0103] The first reference signal and the second reference signal are located in the same time slot;

[0104] The first reference signal and the second reference signal each occupy one symbol;

[0105] The first reference signal and the second reference signal do not occupy the same symbol.

[0106] Optionally, the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal further satisfy at least one of the following:

[0107] The frequency domain bandwidth of the first reference signal is a subset of the frequency domain bandwidth of the second reference signal;

[0108] A first reference signal is configured on a first subcarrier in the frequency domain bandwidth of the first reference signal, and the first subcarrier corresponds to a subcarrier where the second reference signal is located.

[0109] Optionally, before sending the initial reference signal resource configuration to the terminal, the method further includes: receiving capability information from the terminal, where the capability information is used to indicate that the terminal supports the reference signal resource configuration.

[0110] Optionally, receiving capability information from the terminal includes: receiving capability information from the terminal through radio resource control RRC signaling, a preamble code of initial access, message 3 of initial access, or message A of initial access.

[0111] It is worth pointing out that the embodiment of the reference signal configuration method on the base station side corresponds to the above-mentioned terminal side method embodiment. The implementation methods introduced in the above-mentioned terminal side embodiment are all applicable to the base station side method embodiment and can achieve the same technical effect, so they will not be repeated here.

[0112] The reference signal configuration method according to the embodiment of the present invention is introduced above from the perspectives of the terminal side and the base station side respectively. The corresponding apparatus will be further described below with reference to the accompanying drawings.

[0113] like Figure 7 As shown, an embodiment of the present invention provides a reference signal configuration device, which is applied to a terminal, including but not limited to the following functional modules:

[0114] A first receiving module 710 is configured to receive a reference signal resource configuration from a base station, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, where the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal;

[0115] The transmission module 720 is configured to receive the first reference signal and the second reference signal according to the reference signal resource configuration.

[0116] Optionally, the reference signal configuration device further includes:

[0117] A second receiving module, configured to receive an initial reference signal resource configuration from the base station;

[0118] A first reporting module, configured to send a first parameter and / or a second parameter to the base station when the initial reference signal resource configuration does not meet a synchronization accuracy requirement or a synchronization deviation correction requirement;

[0119] The first parameter is used to indicate the synchronization accuracy requirement, and the second parameter is used to indicate the synchronization deviation correction requirement.

[0120] Optionally, the reference signal resource configuration further includes: a time domain configuration of a first reference signal and a time domain configuration of a second reference signal, wherein the time domain configuration of the first reference signal and the time domain configuration of the second reference signal satisfy at least one of the following:

[0121] The first reference signal and the second reference signal are located in the same time slot;

[0122] The first reference signal and the second reference signal each occupy one symbol;

[0123] The first reference signal and the second reference signal do not occupy the same symbol.

[0124] Optionally, the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal further satisfy at least one of the following:

[0125] The frequency domain bandwidth of the first reference signal is a subset of the frequency domain bandwidth of the second reference signal;

[0126] The first reference signal is configured on a first subcarrier in the frequency domain bandwidth of the first reference signal, and the first subcarrier corresponds to a subcarrier where the second reference signal is located.

[0127] Optionally, the reference signal configuration device further includes:

[0128] The second reporting module is used to send capability information to the base station, where the capability information is used to indicate that the terminal supports the reference signal resource configuration.

[0129] Optionally, the second reporting module is specifically used to:

[0130] The capability information is sent to the base station through radio resource control RRC signaling, a preamble code of initial access, message 3 of initial access, or message A of initial access.

[0131] Optionally, the reference signal configuration device further includes:

[0132] A first determination module, configured to determine a first synchronization accuracy according to a frequency domain configuration of the first reference signal;

[0133] A second determination module, configured to determine a second synchronization accuracy according to a frequency domain configuration of the second reference signal;

[0134] A synchronization module is used to determine to use a target reference signal for synchronization according to the relationship between the first synchronization accuracy, the second synchronization accuracy and the synchronization accuracy requirement, where the target reference signal is at least one of the first reference signal and the second reference signal.

[0135] Optionally, the synchronization module is specifically used for:

[0136] If the first synchronization accuracy is greater than the synchronization accuracy requirement, determining to use the first reference signal for synchronization;

[0137] If the first synchronization accuracy is not greater than the synchronization accuracy requirement, it is determined to use the first reference signal and the second reference signal for synchronization.

[0138] like Figure 8 As shown, the embodiment of the present invention further provides a reference signal configuration device, which is applied to a base station, including but not limited to the following functional modules:

[0139] A first sending module 810 is configured to send a reference signal resource configuration to a terminal, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, where the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal;

[0140] The transmission module 820 is configured to send the first reference signal and the second reference signal according to the reference signal resource configuration.

[0141] Optionally, the reference signal configuration device further includes:

[0142] A second sending module, configured to send an initial reference signal resource configuration to the terminal;

[0143] The third receiving module is used to receive the first parameter and / or the second parameter from the terminal; wherein,

[0144] A first sending module 810, configured to send the reference signal resource configuration to the terminal after receiving the first parameter and / or the second parameter;

[0145] Among them, the first parameter is used to indicate the synchronization accuracy requirement sent by the terminal when the initial reference signal resource configuration does not meet the synchronization accuracy requirement, and the second parameter is used to indicate the synchronization correction requirement sent by the terminal when the initial reference signal resource configuration does not meet the synchronization correction requirement.

[0146] Optionally, the reference signal resource configuration further includes: a time domain configuration of a first reference signal and a time domain configuration of a second reference signal, wherein the time domain configuration of the first reference signal and the time domain configuration of the second reference signal satisfy at least one of the following:

[0147] The first reference signal and the second reference signal are located in the same time slot;

[0148] The first reference signal or the second reference signal occupies one symbol;

[0149] The first reference signal and the second reference signal do not occupy the same symbol.

[0150] Optionally, the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal further satisfy at least one of the following:

[0151] The frequency domain bandwidth of the first reference signal is a subset of the frequency domain bandwidth of the second reference signal;

[0152] The first reference signal is configured on a subcarrier corresponding to a subcarrier where the second reference signal is located in the frequency domain bandwidth of the first reference signal.

[0153] Optionally, the reference signal configuration device further includes:

[0154] The fourth receiving module is used to receive capability information from the terminal, where the capability information is used to indicate that the terminal supports the reference signal resource configuration.

[0155] Optionally, the fourth receiving module is specifically configured to:

[0156] The capability information is received from the terminal through radio resource control RRC signaling, a preamble code of initial access, message 3 of initial access, or message A of initial access.

[0157] It is worth noting that the reference signal configuration device of the embodiment of the present invention is a product embodiment corresponding to the above-mentioned reference signal configuration method. All implementation methods of the above-mentioned method embodiment are applicable to the device embodiment and can achieve the same technical effect, so they will not be repeated here.

[0158] like Fig. 9 As shown, a terminal 900 according to an embodiment of the present invention includes a processor 910 and a transceiver 920, wherein:

[0159] The transceiver is used to receive a reference signal resource configuration from a base station, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, where the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal;

[0160] The processor is configured to receive the first reference signal and the second reference signal according to the reference signal resource configuration.

[0161] like Fig.10As shown, a base station 1000 according to an embodiment of the present invention includes a processor 1010 and a transceiver 1020, wherein:

[0162] The transceiver is used to send a reference signal resource configuration to a terminal under the control of the processor, the reference signal resource configuration including: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfying: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal; and, according to the reference signal resource configuration, sending the first reference signal and the second reference signal.

[0163] In this embodiment, the terminal receives a reference signal resource configuration from a base station, and the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, and the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: the frequency domain bandwidth of the first reference signal is less than the frequency domain bandwidth of the second reference signal, and the frequency domain density of the first reference signal is greater than the frequency domain density of the second reference signal; according to the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal that meets the synchronization accuracy requirement or the synchronization correction requirement, the reference signal is transmitted. The base station configures the first reference signal and the second reference signal with different frequency domain bandwidths and different frequency domain densities for the terminal, and the terminal can select a reference signal that meets the requirement based on the synchronization accuracy requirement or the synchronization correction requirement. For example, when the synchronization accuracy requirement is low, a reference signal with a small frequency domain bandwidth is selected, when the synchronization accuracy requirement is high, a reference signal with a large frequency domain bandwidth is selected, when the synchronization correction requirement is low, a reference signal with a low frequency domain density is selected, and when the synchronization correction requirement is high, a reference signal with a high frequency domain density is selected. The first reference signal and the second reference signal are flexibly configured in this way, while meeting the synchronization requirements of different terminals, without occupying additional wireless resources, thereby avoiding unnecessary waste of resources.

[0164] A terminal according to another embodiment of the present invention, such as Fig.11 As shown, it includes a transceiver 1110, a processor 1100, a memory 1120, and a program or instruction stored in the memory 1120 and executable on the processor 1100; when the processor 1100 executes the program or instruction, the reference signal configuration method applied to the terminal is implemented.

[0165] The transceiver 1110 is used to receive and send data under the control of the processor 1100 .

[0166] Among them, Fig.11In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1100 and various circuits of memory represented by memory 1120 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1110 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. For different user devices, the user interface 1130 may also be an interface capable of externally and internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0167] The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 can store data used by the processor 1100 when performing operations.

[0168] A base station according to another embodiment of the present invention, Fig.12 As shown, it includes a transceiver 1210, a processor 1200, a memory 1220, and a program or instruction stored in the memory 1220 and executable on the processor 1200; when the processor 1200 executes the program or instruction, the reference signal configuration method applied to the base station is implemented.

[0169] The transceiver 1210 is used to receive and send data under the control of the processor 1200 .

[0170] Among them, Fig.12 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1200 and various circuits of memory represented by memory 1220 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1210 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 may store data used by the processor 1200 when performing operations.

[0171] A readable storage medium of an embodiment of the present invention stores a program or instruction thereon. When the program or instruction is executed by a processor, the steps in the reference signal configuration method described above on the terminal side or the base station side are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0172] The processor is a processor in the terminal or base station described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0173] It should be further explained that the terminals described in this specification include but are not limited to smart phones, tablet computers, etc., and many of the functional components described are called modules in order to more particularly emphasize the independence of their implementation methods.

[0174] In the embodiment of the present invention, module can be implemented with software so that it can be executed by various types of processors. For example, an executable code module of an identification can include one or more physical or logical blocks of computer instructions, for example, it can be constructed as an object, process or function. Nevertheless, the executable code of the identified module does not need to be physically located together, but can include different instructions stored in different positions, and when these instructions are logically combined together, it constitutes a module and realizes the specified purpose of the module.

[0175] In fact, executable code module can be a single instruction or many instructions, and can even be distributed on a plurality of different code segments, distributed among different programs, and distributed across a plurality of memory devices. Similarly, operating data can be identified in the module, and can be implemented and organized in the data structure of any appropriate type according to any appropriate form. The operating data can be collected as a single data set, or can be distributed in different locations (including on different storage devices), and can only be present on a system or network as an electronic signal at least in part.

[0176] When a module can be implemented by software, considering the level of existing hardware technology, a person skilled in the art can build a corresponding hardware circuit to implement the corresponding function of the module that can be implemented by software without considering the cost. The hardware circuit includes a conventional very large scale integration (VLSI) circuit or gate array and existing semiconductors such as logic chips, transistors, or other discrete components. The module can also be implemented by a programmable hardware device, such as a field programmable gate array, a programmable array logic, a programmable logic device, etc.

[0177] The above exemplary embodiments are described with reference to the accompanying drawings, and many different forms and embodiments are feasible without departing from the spirit and teachings of the present invention. Therefore, the present invention should not be constructed as a limitation of the exemplary embodiments proposed herein. More specifically, these exemplary embodiments are provided so that the present invention will be perfect and complete, and the scope of the present invention will be conveyed to those who are familiar with the technology. In these figures, the component sizes and relative sizes may be exaggerated for clarity. The terms used here are only based on the purpose of describing specific exemplary embodiments and are not intended to be limiting. As used herein, unless the text clearly indicates otherwise, the singular forms "one", "an" and "the" are intended to include these multiple forms. It will be further understood that the terms "including" and / or "comprising" when used in this specification indicate the presence of the features, integers, steps, operations, components and / or components, but do not exclude the presence or increase of one or more other features, integers, steps, operations, components, components and / or their groups. Unless otherwise indicated, when stated, a range of values ​​includes the upper and lower limits of that range and any subranges therebetween.

[0178] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A reference signal configuration method, applied to a terminal, characterized in that: include: Receiving a reference signal resource configuration from a base station, the reference signal resource configuration comprising: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfying: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal; According to the reference signal resource configuration, the first reference signal and the second reference signal are received.

2. The reference signal configuration method according to claim 1, characterized in that: Before receiving the reference signal resource configuration from the base station, the method further includes: receiving an initial reference signal resource configuration from the base station; When the initial reference signal resource configuration does not meet the synchronization accuracy requirement or the synchronization deviation correction requirement, sending the first parameter and / or the second parameter to the base station; The first parameter is used to indicate the synchronization accuracy requirement, and the second parameter is used to indicate the synchronization deviation correction requirement.

3. The reference signal configuration method according to claim 1, characterized in that: The reference signal resource configuration further includes: a time domain configuration of a first reference signal and a time domain configuration of a second reference signal, wherein the time domain configuration of the first reference signal and the time domain configuration of the second reference signal satisfy at least one of the following: The first reference signal and the second reference signal are located in the same time slot; The first reference signal and the second reference signal each occupy one symbol; The first reference signal and the second reference signal do not occupy the same symbol.

4. The reference signal configuration method according to claim 1, characterized in that: The frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal further satisfy at least one of the following: The frequency domain bandwidth of the first reference signal is a subset of the frequency domain bandwidth of the second reference signal; The first reference signal is configured on a first subcarrier in the frequency domain bandwidth of the first reference signal, and the first subcarrier corresponds to a subcarrier where the second reference signal is located.

5. The reference signal configuration method according to claim 1, characterized in that: Before receiving the reference signal resource configuration from the base station, the method further includes: Sending capability information to the base station, where the capability information is used to indicate that the terminal supports the reference signal resource configuration.

6. The reference signal configuration method according to claim 5, characterized in that: Sending capability information to the base station includes: The capability information is sent to the base station through radio resource control RRC signaling, a preamble code of initial access, message 3 of initial access, or message A of initial access.

7. The reference signal configuration method according to any one of claims 1 to 6, characterized in that: After receiving the reference signal resource configuration from the base station, the method further includes: Determining a first synchronization accuracy according to the frequency domain configuration of the first reference signal; Determining a second synchronization accuracy according to the frequency domain configuration of the second reference signal; After receiving the first reference signal and the second reference signal according to the reference signal resource configuration, the method further includes: According to the relationship between the first synchronization accuracy, the second synchronization accuracy and the synchronization accuracy requirement, it is determined to adopt a target reference signal for synchronization, where the target reference signal is at least one of the first reference signal and the second reference signal.

8. The reference signal configuration method according to claim 7, characterized in that: Determining, according to a relationship among the first synchronization accuracy, the second synchronization accuracy, and the synchronization accuracy requirement, to use a target reference signal for synchronization includes: If the first synchronization accuracy is greater than the synchronization accuracy requirement, determining to use the first reference signal for synchronization; or, If the first synchronization accuracy is not greater than the synchronization accuracy requirement, it is determined to use the first reference signal and the second reference signal for synchronization.

9. A reference signal configuration method, applied to a base station, characterized in that: include: Sending a reference signal resource configuration to a terminal, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, where the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal; The first reference signal and the second reference signal are sent according to the reference signal resource configuration.

10. The reference signal configuration method according to claim 9, characterized in that: Also includes: Sending an initial reference signal resource configuration to the terminal; receiving a first parameter and / or a second parameter from the terminal; After receiving the first parameter and / or the second parameter, sending the reference signal resource configuration to the terminal; Among them, the first parameter is used to indicate the synchronization accuracy requirement sent by the terminal when the initial reference signal resource configuration does not meet the synchronization accuracy requirement, and the second parameter is used to indicate the synchronization correction requirement sent by the terminal when the initial reference signal resource configuration does not meet the synchronization correction requirement.

11. The reference signal configuration method according to claim 10, characterized in that: Before sending the initial reference signal resource configuration to the terminal, the method further includes: Capability information is received from the terminal, where the capability information is used to indicate that the terminal supports the reference signal resource configuration.

12. The reference signal configuration method according to claim 11, characterized in that: Receiving capability information from the terminal, including: The capability information is received from the terminal through radio resource control RRC signaling, a preamble code of initial access, message 3 of initial access, or message A of initial access.

13. A reference signal configuration device, applied to a terminal, characterized in that: include: A first receiving module is configured to receive a reference signal resource configuration from a base station, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, where the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal; A transmission module is used to receive the first reference signal and the second reference signal according to the reference signal resource configuration.

14. A reference signal configuration device, applied to a base station, characterized in that: include: A first sending module is configured to send a reference signal resource configuration to a terminal, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, where the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal; A transmission module is used to send the first reference signal and the second reference signal according to the reference signal resource configuration.

15. A terminal, characterized in that: include: transceivers and processors; The transceiver is used to receive a reference signal resource configuration from a base station, where the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, where the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal; The processor is configured to receive the first reference signal and the second reference signal according to the reference signal resource configuration.

16. A base station, characterized in that: include: transceivers and processors; The transceiver is used to send a reference signal resource configuration to a terminal under the control of the processor, wherein the reference signal resource configuration includes: a frequency domain configuration of a first reference signal and a frequency domain configuration of a second reference signal, wherein the frequency domain configuration of the first reference signal and the frequency domain configuration of the second reference signal satisfy: a frequency domain bandwidth of the first reference signal is smaller than a frequency domain bandwidth of the second reference signal, and a frequency domain density of the first reference signal is greater than a frequency domain density of the second reference signal; and, The first reference signal and the second reference signal are sent according to the reference signal resource configuration.

17. A readable storage medium having a program or instruction stored thereon, characterized in that: When the program or instruction is executed by the processor, the steps in the reference signal configuration method according to any one of claims 1 to 8 are implemented, or the steps in the reference signal configuration method according to any one of claims 9 to 12 are implemented.

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