Method and device for determining reference signal sequence, computer program product and computer readable storage medium

Abstract

The invention provides a method for determining a reference signal sequence, terminal equipment and network equipment. The method comprises the following steps: the terminal equipment receives first indication information sent by the network equipment; the terminal device determines a target resource according to the first indication information; the terminal device determines a reference signal sequence according to the parameter of the first bandwidth and the parameter of the second bandwidth; and the terminal device sends or receives the reference signal sequence on the target resource. According to the method for determining the reference signal sequence provided by the invention, the reference signal sequence can be determined according to the parameter of the first bandwidth and the parameter of the second bandwidth, so that the reference signal sequence on the first bandwidth is the same as the reference signal sequence on the second bandwidth; a reference signal sequence on a first bandwidth and a reference signal sequence on a second bandwidth can be configured to be identical, orthogonal or quasi-orthogonal, and terminal equipment working on the first bandwidth and the second bandwidth is supported to perform MU-MIMO.

Description

[0001] This application is a divisional application. The application number of the original application is 201880029670.2, and the original application date is May 4, 2018. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of communications, and more specifically, to a method, an apparatus, a computer program product, and a computer-readable storage medium for determining a reference signal sequence. Background Art

[0003] In the long term evolution-advanced (LTE-A) system, the maximum supported system bandwidth is 20MHz, corresponding to a maximum of 110 resource blocks (RBs), and the downlink demodulation reference signal (DMRS) generates a reference signal sequence based on the number of RBs in the maximum bandwidth, and the DMRS on the corresponding RB uses the corresponding reference signal sequence.

[0004] Due to the insufficient capabilities of some terminal devices (for example, poor RF device functions, etc.) or other reasons, these terminal devices cannot transmit data at the maximum bandwidth and may only be able to access a frequency band with a smaller bandwidth, which can be called a component carrier (CC). In LTE-A, CC can be regarded as a serving cell, and the terminal device only needs to know the cell bandwidth, that is, the system bandwidth of the CC. The reference signal of the terminal device on the CC is generated according to the number of RBs corresponding to the maximum bandwidth of LTE-A, and the physical resource block (PRB) is numbered from the starting position of the CC in the frequency domain. In the LTE-A system, the terminal device can use carrier aggregation (CA) to transmit data on multiple CCs, so that the terminal device can use more bandwidth for data transmission and improve the data transmission rate.

[0005] The new generation of wireless communication system developed for the fifth generation mobile communication technology (5-Generation, 5G) is called new radio (NR). NR supports larger bandwidth and more services. Due to the different capabilities of terminal devices, NR supports terminal devices with different capabilities to use CCs with different bandwidths. NR also proposes some new concepts, such as bandwidth part (BP).

[0006] Resource allocation in NR is more flexible, and many companies believe that more flexible multi-user multiple-input multiple-output (MU-MIMO) technology needs to be considered. For example, MU-MIMO can be performed when the bandwidths accessed by multiple terminal devices partially overlap, and MU-MIMO can be performed on terminal devices on CC and wideband CC. If NR needs to support terminal devices working on wideband (or wideband CC) to perform MU-MIMO with terminal devices working in one CC or using multiple CCs aggregated or working on BP, then the DMRS that needs to be supported can be configured to be orthogonal or quasi-orthogonal. However, the existing DMRS sequence generation and mapping methods on wideband and CC in LTE-A cannot support the DMRS configuration of users working on wideband and users working on one or more CCs to be orthogonal. Summary of the invention

[0007] The present application provides a method for determining a reference signal sequence, a terminal device, and a network device, which can determine the reference signal sequence according to the parameters of a first bandwidth and the parameters of a second bandwidth, so that the reference signal sequence on the first bandwidth is the same as the reference signal sequence on the second bandwidth, and the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be configured to be the same, orthogonal, or quasi-orthogonal, and support terminal devices working on the first bandwidth and the second bandwidth to perform MU-MIMO.

[0008] In a first aspect, a method for determining a reference signal sequence is provided, the method comprising: receiving first indication information sent by a network device; determining a bandwidth part according to the first indication information; determining a reference signal sequence according to an offset between a frequency domain starting position of the bandwidth part and a frequency domain starting position of a system maximum bandwidth; and sending or receiving the reference signal sequence using the bandwidth part.

[0009] In a possible implementation manner of the first aspect, the method further includes: receiving second indication information sent by the network device;

[0010] The frequency domain starting position of the maximum bandwidth of the system is determined according to the second indication information.

[0011] In a possible implementation manner of the first aspect, the method further includes: receiving third indication information sent by the network device;

[0012] A frequency domain starting position of the bandwidth part is determined according to the third indication information.

[0013] In a possible implementation of the first aspect, a reference signal sequence is determined based on an offset between a frequency domain starting position of the bandwidth part and a frequency domain starting position of a system maximum bandwidth, including: determining the reference signal sequence based on an offset between a frequency domain starting position of the bandwidth part and a frequency domain starting position of a system maximum bandwidth, and a subcarrier spacing.

[0014] In a second aspect, a method for determining a reference signal sequence is provided, which includes: sending first indication information to a terminal device, the first indication information being used to indicate a bandwidth part; sending second indication information to the terminal device, the second indication information being used to indicate a frequency domain starting position of a system maximum bandwidth.

[0015] In a possible implementation manner of the second aspect, the method further includes: sending third indication information to the terminal device, where the third indication information is used to indicate a frequency domain starting position of the bandwidth part.

[0016] In a possible implementation of the second aspect, the offset between the frequency domain starting position of the bandwidth part and the frequency domain starting position of the system maximum bandwidth is used by the terminal device to determine a reference signal sequence and send the reference signal sequence using the bandwidth part.

[0017] In a third aspect, a device for determining a reference signal sequence is provided, which device may be a terminal device or a chip in a terminal device. The device may include a processing unit and a transceiver unit. When the device is a terminal device, the processing unit may be a processor, and the transceiver unit may be a transceiver; the terminal device may also include a storage unit, and the storage unit may be a memory; the storage unit is used to store instructions, and the processing unit executes the instructions stored in the storage unit so that the terminal device executes the method for determining a reference signal sequence in the first aspect and its various implementations. When the device is a chip in a terminal device, the processing unit may be a processor, and the transceiver unit may be an input / output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage unit so that the terminal device executes the method for determining a reference signal sequence in the first aspect and its various implementations, and the storage unit may be a storage unit in the chip (for example, a register, a cache, etc.), or a storage unit in the terminal device located outside the chip (for example, a read-only memory, a random access memory, etc.).

[0018] In a fourth aspect, a device for determining a reference signal sequence is provided, which device may be a network device or a chip in a network device. The device may include a processing unit and a transceiver unit. When the device is a network device, the processing unit may be a processor, and the transceiver unit may be a transceiver; the network device may also include a storage unit, and the storage unit may be a memory; the storage unit is used to store instructions, and the processing unit executes the instructions stored in the storage unit so that the network device executes the method for determining a reference signal sequence in the second aspect and various implementations thereof. When the device is a chip in a network device, the processing unit may be a processor, and the transceiver unit may be an input / output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage unit so that the network device executes the method for determining a reference signal sequence in the second aspect and various implementations thereof, and the storage unit may be a storage unit in the chip (e.g., a register, a cache, etc.), or a storage unit in the network device located outside the chip (e.g., a read-only memory, a random access memory, etc.).

[0019] In a fifth aspect, a device for obtaining a resource indication value is provided, the device comprising a processor and a storage medium, the storage medium storing instructions, and when the instructions are executed by the processor, the processor executes the method for determining a reference signal sequence in the first aspect and various implementations thereof. The device may be a chip or a chip system.

[0020] In a sixth aspect, a device for obtaining a resource indication value is provided, the device comprising a processor and a storage medium, the storage medium storing instructions, and when the instructions are executed by the processor, the processor executes the method for determining a reference signal sequence in the second aspect and various implementations thereof. The device may be a chip or a chip system.

[0021] In a seventh aspect, a computer program product is provided, comprising: a computer program code, which, when executed by a communication device, enables the communication device to execute the method for determining a reference signal sequence in the above-mentioned first aspect and its various implementation methods.

[0022] In an eighth aspect, a computer program product is provided, comprising: a computer program code, which, when executed by a communication device, enables the communication device to execute the method for determining a reference signal sequence in the above-mentioned second aspect and its various implementation methods.

[0023] In a ninth aspect, a computer-readable storage medium is provided for storing a computer program for executing instructions of the method for determining a reference signal sequence in the first aspect and its various implementations.

[0024] In a tenth aspect, a computer-readable storage medium is provided for storing a computer program for executing instructions of the method for determining a reference signal sequence in the above-mentioned second aspect and its various implementations.

[0025] In the eleventh aspect, a method for determining a reference signal sequence is provided, the method comprising: a terminal device receives first indication information sent by a network device; the terminal device determines a target resource based on the first indication information; the terminal device determines a reference signal sequence based on parameters of a first bandwidth and parameters of a second bandwidth; the terminal device sends or receives the reference signal sequence on the target resource.

[0026] The method for determining the reference signal provided in the eleventh aspect can determine the reference signal sequence according to the parameters of the first bandwidth and the parameters of the second bandwidth, so that the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth are the same, and the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be configured to be the same, orthogonal or quasi-orthogonal, supporting terminal devices working on the first bandwidth and the second bandwidth to perform MU-MIMO.

[0027] In a possible implementation manner of the eleventh aspect, the parameters of the second bandwidth include at least one of the following parameters: a center frequency point of the second bandwidth, a bandwidth value of the second bandwidth, and a frequency domain starting position of the second bandwidth.

[0028] In a possible implementation manner of the eleventh aspect, the parameters of the first bandwidth include at least one of the following parameters: a center frequency point of the first bandwidth, a bandwidth value of the first bandwidth, and a frequency domain starting position of the first bandwidth.

[0029] In a possible implementation manner of the eleventh aspect, the method further includes: the terminal device receives second indication information sent by the network device; and the terminal device determines at least one of the parameters of the second bandwidth according to the second indication information.

[0030] In a possible implementation manner of the eleventh aspect, the method further includes: the terminal device receives third indication information sent by the network device; and the terminal device determines at least one parameter of the first bandwidth according to the third indication information.

[0031] In a possible implementation of the eleventh aspect, the terminal device determines the reference signal sequence based on the parameters of the first bandwidth and the parameters of the second bandwidth, including: the terminal device determines the reference signal sequence based on the parameters of the first bandwidth, the parameters of the second bandwidth and the subcarrier spacing.

[0032] In a possible implementation manner of the eleventh aspect, a frequency domain of the target resource is the same as or partially overlaps with a frequency domain of the first bandwidth.

[0033] In a possible implementation manner of the eleventh aspect, a bandwidth value of the first bandwidth is less than or equal to a bandwidth value of the second bandwidth.

[0034] In a possible implementation of the eleventh aspect, the first bandwidth is any one of the working bandwidth, service cell bandwidth and carrier bandwidth of the terminal device; the second bandwidth is any one of the system maximum bandwidth, cell bandwidth and broadband carrier bandwidth.

[0035] In the twelfth aspect, a method for determining a reference signal sequence is provided, the method comprising: a network device sends first indication information to a terminal device, the first indication information being used to indicate a target resource; the network device sends second indication information to the terminal device, the second indication information being used to indicate a parameter of a second bandwidth.

[0036] The method for determining a reference signal sequence provided in the twelfth aspect sends indication information for indicating the parameters of the second bandwidth to a terminal device through a network device, which can support UE working on the first bandwidth and terminal devices working on the second bandwidth to perform MU-MIMO, that is, determining the reference signal sequence according to the parameters of the first bandwidth and the parameters of the second bandwidth, and ultimately making the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth configured to be the same, orthogonal or quasi-orthogonal, supporting terminal devices working on the first bandwidth and the second bandwidth to perform MU-MIMO.

[0037] In a possible implementation manner of the twelfth aspect, the method further includes: the network device sending third indication information to the terminal device, where the third indication information is used to indicate a parameter of the first bandwidth.

[0038] In a possible implementation manner of the twelfth aspect, the parameters of the second bandwidth and the parameters of the first bandwidth are used by the terminal device to determine a reference signal sequence and send the reference signal sequence on the target resource.

[0039] In a possible implementation manner of the twelfth aspect, the parameters of the second bandwidth include at least one of the following parameters: a center frequency point of the second bandwidth, a bandwidth value of the second bandwidth, and a frequency domain starting position of the second bandwidth.

[0040] In a possible implementation manner of the twelfth aspect, the parameters of the first bandwidth include at least one of the following parameters: a center frequency point of the first bandwidth, a bandwidth value of the first bandwidth, and a frequency domain starting position of the first bandwidth.

[0041] In a possible implementation manner of the twelfth aspect, a bandwidth value of the first bandwidth is less than or equal to a bandwidth value of the second bandwidth.

[0042] In a possible implementation manner of the twelfth aspect, the frequency domain of the target resource and the frequency domain of the first bandwidth are the same or partially overlapped.

[0043] In a possible implementation of the twelfth aspect, the first bandwidth is any one of the working bandwidth, service cell bandwidth and carrier bandwidth of the terminal device; the second bandwidth is any one of the system maximum bandwidth, cell bandwidth and broadband carrier bandwidth.

[0044] In a thirteenth aspect, a terminal device is provided, comprising a processor, a memory and a transceiver, for supporting the terminal device to perform corresponding functions in the above method. The processor, the memory and the transceiver are connected by communication, the memory stores instructions, the transceiver is used to perform specific signal transmission and reception under the drive of the processor, and the processor is used to call the instruction to implement the method for determining a reference signal sequence in the above first aspect and various implementations thereof.

[0045] In a fourteenth aspect, a terminal device is provided, including a processing module, a storage module, and a transceiver module, which are used to support the terminal device to perform the functions of the terminal device in the first aspect or any possible implementation of the first aspect. The functions can be implemented by hardware, or by hardware executing corresponding software implementations, and the hardware or software includes one or more modules corresponding to the above functions.

[0046] In a fifteenth aspect, a network device is provided, comprising a processor, a memory and a transceiver, for supporting the network device to perform corresponding functions in the above method. The processor, the memory and the transceiver are connected by communication, the memory stores instructions, the transceiver is used to perform specific signal transmission and reception under the drive of the processor, and the processor is used to call the instruction to implement the method for determining a reference signal sequence in the above second aspect and various implementations thereof.

[0047] In a sixteenth aspect, a network device is provided, including a processing module, a storage module, and a transceiver module, for supporting a terminal device to perform the functions of the terminal device in the second aspect or any possible implementation of the second aspect. The functions can be implemented by hardware, or by hardware executing corresponding software, and the hardware or software includes one or more modules corresponding to the above functions.

[0048] In a seventeenth aspect, a communication system is provided, the communication system comprising the terminal device provided in the third aspect and the network device provided in the fourth aspect. The communication system can implement the method for determining a reference signal sequence provided in the first aspect and the second aspect.

[0049] In an eighteenth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program includes instructions for executing the method of the above-mentioned first aspect or any possible implementation manner of the first aspect.

[0050] In a nineteenth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program includes instructions for executing the method of the above-mentioned second aspect or any possible implementation manner of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of a sequence of reference signals corresponding to an existing UE accessing a CC and accessing a maximum bandwidth.

[0052] Figure 2 It is a schematic diagram of a typical application scenario of an embodiment of the present application.

[0053] Figure 3 It is a schematic flowchart of a method for determining a reference signal sequence according to an embodiment of the present application.

[0054] Figure 4 It is a schematic diagram of reference signal sequences of different bandwidths according to an embodiment of the present application.

[0055] Figure 5 It is a schematic diagram of determining a bias value according to an embodiment of the present application.

[0056] Figure 6 It is a schematic diagram of determining the bias value according to another embodiment of the present application.

[0057] Figure 7 It is a schematic flowchart of a method for determining a reference signal sequence according to another embodiment of the present application.

[0058] Figure 8 It is a schematic block diagram of a terminal device according to an embodiment of the present application.

[0059] Fig. 9 It is a schematic block diagram of a terminal device according to another embodiment of the present application.

[0060] Fig.10 It is a schematic block diagram of a network device according to an embodiment of the present application.

[0061] Fig.11 It is a schematic block diagram of a network device according to another embodiment of the present application. DETAILED DESCRIPTION

[0062] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0063] In the LTE-A system, the maximum supported system bandwidth is 20 MHz, corresponding to a maximum of 110 RBs. The downlink DMRS generates a reference signal sequence based on the number of RBs in the maximum bandwidth. The DMRS on the corresponding RB uses the corresponding reference signal sequence. The generation formula of the DMRS sequence is shown in formula (1):

[0064]

[0065] Wherein, c(m) is a pseudo-random sequence (PN sequence), and the reference signal sequence r(m) is composed of the PN sequence. init is the initialization value, formula (2) is the initialization value c init The generation formula of . Indicates the maximum downlink bandwidth is 110 RB.

[0066] The mapping formula between LTE downlink DMRS port and time-frequency resources is shown in formula (3):

[0067]

[0068] In formula (3), p is the antenna port corresponding to DMRS, k is the frequency domain subcarrier position where DMRS is mapped to the time-frequency resource, 1 is the time domain symbol position where DMRS is mapped to the time-frequency resource, and n is the frequency domain subcarrier position where DMRS is mapped to the time-frequency resource. PRB is the physical resource block (PRB) number, w p (l') is the orthogonal cover code (OCC) corresponding to the port number p. Through the mapping formula (3), the REs and sequence values ​​r(m) of different time-frequency resources (frequency domain number k, time domain symbol number L) are mapped one by one. According to the above sequence generation and mapping formula, the DMRS sequence values ​​on different RBs can be uniquely determined.

[0069] In the downlink MU-MIMO of LTE-A, multiple terminal devices can perform MU-MIMO on the same bandwidth. In order to demodulate the data of different users, the base station configures quasi-orthogonal or orthogonal DMRS for multiple UEs. The method of using quasi-orthogonality is to configure orthogonal ports for multiple users and achieve orthogonality by using different OCCs. Table 1 shows a configuration method of DMRSport and the number of layers in LTE-A. By configuring the corresponding configuration items for the users, the network-side equipment can support the correct demodulation of DMRS when multiple users perform MU-MIMO.

[0070] Table 1 Reference signal configuration table

[0071]

[0072] Figure 1 It is a schematic diagram of the sequence of reference signals corresponding to the existing terminal equipment when accessing different CCs. Figure 1 As shown, the numbers 0, 1, 2, .. m in the figure are RB numbers. For the same position in the entire frequency domain, when the terminal device accesses different CCs, the corresponding reference signal sequences (RB numbers) are different.

[0073] If NR needs to support MU-MIMO for terminal devices on CC, wideband CC or BP, the existing DMRS sequence generation and mapping method on each CC of LTE-A cannot support the reference signal configuration of terminal devices on CC, wideband CC or BP on the same frequency band to be orthogonal.

[0074] Based on the problems existing in the design method of reference signals in the above-mentioned prior art, the present application provides a method for determining a reference signal sequence, which can better solve the requirement of supporting terminal devices working on wideband (or wideband CC) in NR to perform MU-MIMO with terminal devices working on one CC or using multiple CCs aggregated, or terminal devices working on BP, so that the base station can better demodulate data from different terminal devices.

[0075] It should be understood that the technical solution of the present application can be applied to various communication systems, such as: LTE / LTE-A system, LTE / LTE-A frequency division duplex (FDD) system, LTE / LTE-A time division duplex (TDD) system, universal mobile telecommunication system (UMTS), world-wide interoperability for microwave access (WiMAX) communication system, public land mobile network (PLMN) system, device to device (D2D) network system or machine to machine (M2M) network system, wireless fidelity (Wi-Fi) system, wireless local area networks (WLAN) and future 5G communication system, etc.

[0076] It should also be understood that in the embodiments of the present application, the terminal device may also be referred to as user equipment (UE), mobile station (MS), mobile terminal (mobile terminal), etc. The terminal device may communicate with one or more core network devices via a radio access network (RAN). For example, the terminal device may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem. It may also include a user unit, a cellular phone, a smart phone, a wireless data card, a personal digital assistant (PDA) computer, a tablet computer, a wireless modem (modem), a handheld device (handset), a laptop computer (laptop computer), a machine type communication (MTC) terminal, and a station (ST) in a wireless local area network (WLAN). It can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (WLL) station, and a next-generation communication system, for example, a terminal device in a fifth-generation (5G) network or a terminal device in a future-evolved public land mobile network (PLMN) network, etc. The embodiments of the present application are not limited here.

[0077] It should also be understood that a base station can also be referred to as a network device. A network device can be a device used to communicate with a terminal device. A network device can be an evolved base station (eNB or eNodeB) in an LTE system, a gNB or access point in NR, a base station transceiver, a transceiver node, etc., or a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN system. For example, a network device can be an access point (AP) in a WLAN, or a base station (BTS) in a global system for mobile communication (GSM) or code division multiple access (CDMA), or a base station (BTS) in CDMA. It can also be an evolved NodeB (eNB or eNodeB) in an LTE system. Alternatively, the network device may also be a NodeB of a third generation (3rd Generation, 3G) system. In addition, the network device may also be a relay station or an access point, or an on-board device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network. The embodiments of the present application are not limited here. For the convenience of description, in all embodiments of the present application, the above-mentioned device for providing a wireless communication function for an MS is collectively referred to as a network device.

[0078] Figure 2 is a schematic diagram of a typical application scenario of the embodiment of the present application, such as Figure 2 As shown, the technical solution of the present application can be applied to the sending and receiving of reference signal sequences during uplink and downlink data transmission between a network device and a terminal device. The reference signal can be DMRS, a channel state information reference signal (channel state information-reference signal, CSI-RS), a sounding reference signal (sounding reference signal, SRS), a phase tracking reference signal (phase tracking reference signal, PTRS), a cell-specific reference signal, a position reference signal, etc., and the embodiments of the present application are not limited here.

[0079] It should be understood that the embodiments of the present application are only Figure 2 The application scenario shown is used as an example for illustration, but the embodiments of the present application are not limited to this. For example, the system may include more terminal devices.

[0080] Combine the following Figure 3The method for determining a reference signal sequence provided by the present application is described in detail. Figure 3 is a schematic flow chart of a method 100 for determining a reference signal sequence implemented in the present application. The method 100 can be applied in Figure 2 The scenario shown can of course also be applied to other communication scenarios, and the embodiments of the present application are not limited here.

[0081] like Figure 3 As shown, the method 100 includes:

[0082] S110, the terminal device receives the first indication information sent by the network device.

[0083] S120: The terminal device determines the target resource according to the first indication information.

[0084] S130, the terminal device determines a reference signal sequence according to parameters of the first bandwidth and parameters of the second bandwidth.

[0085] S140, the terminal device sends or receives the reference signal sequence on the target resource.

[0086] Specifically, in S110 and S120, when the terminal device needs to send data on a certain time-frequency resource, it also needs to send a reference signal sequence on this resource. The reference signal sequence is used by the network device to perform channel estimation, coherent detection and demodulation, so that the network device can correctly demodulate the data of the terminal device. Therefore, the terminal device will receive the first indication information sent by the network device, and the first indication information is used to indicate the time-frequency resource, i.e., the target resource, on which the terminal device sends the reference signal sequence. The terminal device can determine the target resource based on the first indication information.

[0087] In S130, after determining the target resource, the terminal device determines the reference signal sequence according to the parameters of the first bandwidth and the parameters of the second bandwidth, so that the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth are the same. In this way, when multiple terminal devices perform MU-MIMO, for example, it is necessary to support terminal devices working on the first bandwidth and terminal devices working on the second bandwidth to perform MU-MIMO. Since the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth are the same, the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be configured to be orthogonal or quasi-orthogonal, so that the network device can correctly parse the data on different terminal devices. Therefore, the reference signal sequence on the first bandwidth is related to the parameters of the first bandwidth and the parameters of the second bandwidth, that is, the reference signal sequence on the first bandwidth is determined according to the parameters of the first bandwidth and the parameters of the second bandwidth. Figure 4 is a schematic diagram of reference signal sequences of different bandwidths according to an embodiment of the present application, such as Figure 4As shown, the maximum bandwidth can be regarded as the second bandwidth, and CC1 or wideband CC2 (wideband CC2) or BP can be regarded as the first bandwidth; or wideband CC2, cell bandwidth or maximum bandwidth can be regarded as the second bandwidth, CC1 can be regarded as the first bandwidth, and the numbers on CC1, wideband CC2 and maximum bandwidth are RB numbers. Since the reference signal sequences of CC1 and wideband CC2 are generated according to the generation method of the reference signal sequence of the maximum bandwidth, Figure 4 It can be seen that for a certain fixed frequency domain range, the reference signal sequences on the maximum bandwidth, CC1, and wideband CC2 can be configured to be the same, orthogonal, or quasi-orthogonal (RB numbers are the same). When terminal device 1 accesses CC1 and terminal device 2 accesses the maximum bandwidth, the reference signal sequence on CC1 and the reference signal sequence on the maximum bandwidth can be configured to be orthogonal or quasi-orthogonal through the configuration in Table 1 above. In this way, when terminal device 1 accesses CC1 and terminal device 2 accesses the maximum bandwidth, the network device can correctly demodulate different user data.

[0088] It should be understood that for LTE / LTE-A systems, that is, when MU-MIMO is not performed in multiple terminal devices, the method for determining the reference signal provided in the embodiment of the present application can also be applied, and the embodiment of the present application is not limited here.

[0089] In S140, after the terminal device determines the reference signal sequence, it sends or receives the reference signal sequence on the target resource for demodulating data of different users.

[0090] It should be understood that the target resource is a resource allocated by the network device to the terminal device, and the terminal device can send or receive data on the target resource. The frequency domain of the target resource can be the same as the frequency domain of the first bandwidth, or it can partially overlap with the frequency domain of the first bandwidth. The frequency domain of the target resource can also be a partial frequency domain of the second bandwidth, or a partial frequency domain of the first bandwidth. The embodiment of the present application is not limited here.

[0091] Optionally, as an embodiment, the first bandwidth may include any one of the working bandwidth of the terminal device, the cell bandwidth serving the terminal device, and the carrier bandwidth. For example, the first bandwidth may be a CC, multiple CCs after carrier aggregation, BP, cell bandwidth, system maximum bandwidth, etc. The second bandwidth may include any one of the system maximum bandwidth, cell bandwidth, and broadband carrier bandwidth. The frequency domain of the first bandwidth may be part of the frequency domain of the second bandwidth, or the frequency domain of the first bandwidth overlaps part of the frequency domain of the second bandwidth, and the bandwidth value of the first bandwidth may be less than or equal to the bandwidth value of the second bandwidth. The embodiments of the present application are not limited here.

[0092] For example, the first bandwidth may be a CC, and the CC may be a serving cell bandwidth, a continuous frequency domain resource in a cell transmission bandwidth, or a non-continuous frequency domain resource in a cell transmission bandwidth, etc., and the embodiments of the present application are not limited here.

[0093] For example, the first bandwidth may be a bandwidth part (BP), where BP is a continuous resource in the frequency domain, and one BP may include K continuous subcarriers, where K is an integer greater than 0; or, one BP may include frequency domain resources where N non-overlapping continuous PRBs are located, where N is an integer greater than 0, and the subcarrier spacing of the PRBs is 15k, 30k, 60k or other subcarrier spacing; or, one BP includes frequency domain resources where N non-overlapping continuous PRB groups are located, and one PRB group contains M continuous PRBs, where N and M are integers greater than 0, and the subcarrier spacing of the PRBs is 15k, 30k, 60k or other subcarrier spacing. For a terminal device, the length of the BP may be less than or equal to the maximum bandwidth supported by the terminal device, and the embodiments of the present application are not limited thereto.

[0094] It should be understood that the first bandwidth may also be a bandwidth formed by aggregating CCs through CA, and the embodiment of the present application does not limit this.

[0095] It should also be understood that the first bandwidth may also include other types of bandwidth, and the second bandwidth may also include other types of bandwidth, and the embodiment of the present application does not limit this.

[0096] The method for determining a reference signal sequence provided in an embodiment of the present application can determine the reference signal sequence according to the parameters of the first bandwidth and the parameters of the second bandwidth, so that the reference signal sequence on the first bandwidth is the same as the reference signal sequence on the second bandwidth. When different terminal devices respectively access the first bandwidth and the second bandwidth for MU-MIMO, the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be configured to be orthogonal or quasi-orthogonal. In this way, data of different terminal devices can be correctly demodulated, thereby improving user experience.

[0097] Optionally, as an embodiment, the parameters of the second bandwidth include at least one of the following parameters: a center frequency point of the second bandwidth, a bandwidth value of the second bandwidth, and a frequency domain starting position of the second bandwidth.

[0098] Optionally, as an embodiment, the parameters of the first bandwidth include at least one of the following parameters: a center frequency point of the first bandwidth, a bandwidth value of the first bandwidth and a frequency domain starting position of the first bandwidth.

[0099] Specifically, after the terminal device obtains the parameters of the first bandwidth to which it has accessed, such as the center frequency of the first bandwidth and the bandwidth value of the first bandwidth, and also obtains the parameters of the second bandwidth, the method for generating the reference signal on the first bandwidth may be the same as or different from the method for generating the reference signal on the second bandwidth, and the length of the reference signal sequence generated by both needs to be generated according to the maximum value of the bandwidths of the two or another larger bandwidth value. This allows the reference sequences of the overlapping parts of the first bandwidth and the second bandwidth in the frequency domain to be configured to be the same, orthogonal or quasi-orthogonal. Since the starting positions of the frequency domains of the first bandwidth and the second bandwidth may be different, it can be regarded that the starting position of the frequency domain of the first bandwidth has an offset value compared to the starting position of the frequency domain of the second bandwidth, which corresponds to the mapping formula of the reference signal sequence, that is, the mapping formula of the reference signal sequence on the first bandwidth has an offset value compared to the mapping formula of the reference signal sequence on the second bandwidth. The offset value is related to the parameters of the first bandwidth and the parameters of the second bandwidth.

[0100] The NR standard has agreed that for a subcarrier spacing, the maximum number of subcarriers per NR carrier is 3300 or 6600. Therefore, the length of the reference signal sequence on all wideband CCs or CCs (or BPs) on a carrier is generated according to the maximum bandwidth or the maximum number of subcarriers. Taking the DMRS sequence generation method in LTE as an example, the sequence generation method of the reference signal on different CCs and wideband CCs or full bandwidth all uses formula (4):

[0101]

[0102] In formula (4), Indicates the maximum bandwidth value. Since the DMRS design of NR may be different from that of LTE, the previous constant value is replaced by A. Since the bandwidth and maximum bandwidth (or maximum number of subcarriers) of different cells may be different, the bandwidth available to the cell may be less than the maximum bandwidth, so the constant in this formula is It can also represent the bandwidth of a cell, wideband bandwidth, or bandwidth after aggregation of multiple CCs, or wideband BP bandwidth, etc. That is, the length of the reference signal sequence generated on the CC or BP can be generated according to the maximum bandwidth, cell bandwidth, or wideband. It should be understood that formula (4) is only used as an example to illustrate the DMRS sequence generation method in LTE. In the embodiment of the present application, other reference signal sequence generation methods can also be used to determine the corresponding reference signal sequence generation method in NR, and the embodiment of the present application is not limited here.

[0103] The mapping formula of the reference signal is explained by taking DMRS as an example. As mentioned above, the mapping formula between DMRS port and video resource is formula (3):

[0104]

[0105] To ensure that the reference signal sequences in the overlapping parts of the first bandwidth and the second bandwidth can be configured to be the same, orthogonal or quasi-orthogonal, the mapping formula of DMRS on the first bandwidth needs to have an offset value (offset), as shown in formula (5) or formula (6):

[0106]

[0107] The relationship between offset1 in formula (5) and offset2 in formula (6) is offset1=3offset2. The relationship between offset1 and offset2 is related to the design of the specific DMRS format, because the actual DMRS format affects the time-frequency resource position of the DMRS sequence mapping, and the corresponding mapping formula is also different.

[0108] Formula (5) or formula (6) is the mapping formula of DMRS on the first bandwidth. Formula (5) or formula (6) is determined, that is, the reference signal sequence on the first bandwidth is determined. In this way, when different terminal devices access the first bandwidth and the second bandwidth for MU-MIMO respectively. The reference signal sequence on the first bandwidth is mapped by formula (5) or formula (6), so that the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth are the same. In this way, through the configuration of the network device, the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be configured to be orthogonal or quasi-orthogonal, and the network device can correctly parse the data sent by each terminal device.

[0109] It should be understood that the above formulas (5) and (6) only take the DMRS mapping formula of LTE as an example. In the embodiment of the present application, adding the offset value to the mapping formula of the first bandwidth is also applicable to other DMRS formats and corresponding mapping formulas.

[0110] Therefore, as long as the offset value of the starting position of the first bandwidth relative to the second bandwidth in the frequency domain can be determined, the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be made the same through their respective mapping formulas, so that the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be configured to be orthogonal or quasi-orthogonal.

[0111] For example, the terminal device can determine the frequency domain starting position f1 of the first bandwidth based on the center frequency of the first bandwidth and the bandwidth value of the first bandwidth, and can determine the frequency domain starting position f of the second bandwidth based on the center frequency of the second bandwidth and the bandwidth value of the second bandwidth. Then the frequency domain offset value of the first bandwidth relative to the second bandwidth is f-f1. The terminal device determines the frequency domain length of an RB under the subcarrier spacing based on the parameter configuration (numerology) or subcarrier spacing currently used by the second bandwidth, and can calculate the number of RBs N corresponding to f-f1, so as to determine the value of the offset is N. Figure 5 shown. Figure 5 is a schematic diagram of determining a bias value according to an embodiment of the present application. Figure 5 In the example, the broadband (band wide, BW) can be regarded as the second bandwidth, CC1 or CC2 can be regarded as the first bandwidth alone, or CC1 and CC2 can be regarded as a wideband CC formed by carrier aggregation, and the wideband CC can be regarded as the first bandwidth. The numbers on CC1, CC2 and BW are RB numbers. For example, according to the starting position and bandwidth value of CC1 in the frequency domain, and the starting position and bandwidth value of BW in the frequency domain, the offset value offset1 of CC1 relative to BW can be determined. Similarly, the value of the offset value offset2 of CC2 relative to BW can also be determined.

[0112] Optionally, as an embodiment, in S130, the terminal device determines the reference signal sequence according to the parameter of the first bandwidth and the parameter of the second bandwidth, including:

[0113] The terminal device determines the reference signal sequence according to the parameters of the first bandwidth, the parameters of the second bandwidth and the subcarrier spacing.

[0114] Specifically, since the numerology or subcarrier spacing may be different at different times, and the frequency domain length of an RB corresponding to different numerologies or subcarrier spacings is also different, when the numerology or subcarrier spacings used at different times are different, the offset value must be determined based on the numerology or subcarrier spacing at the current moment, so as to determine the reference signal sequence, that is, the offset value needs to be determined based on the numerology or subcarrier spacing at the current moment.

[0115] It should also be understood that the offset value is related to the offset value of the frequency domain of the first bandwidth relative to the second bandwidth. Assuming that the offset value of the frequency domain starting position of the first bandwidth relative to the frequency domain starting position of the second bandwidth is N RBs, then the offset value is equal to N. The number of RBs of the offset value is calculated according to the subcarrier spacing on the carrier and the number of subcarriers in one RB. In this way, it can be ensured that no matter whether the terminal device accesses the first bandwidth or the second bandwidth, if the OCC and sequence initialization values ​​used are the same, then as long as the frequency domain position is fixed, the corresponding reference signal sequence used is the same.

[0116] It should also be understood that the above method for determining the reference signal sequence on one CC is given. The terminal device may also use CA to access multiple CCs, and the reference signals on other CCs may also be determined according to a similar method. For example, when the terminal device accesses CC1, CC2, and CC3, CC1, CC2, and CC3 may be respectively regarded as the first bandwidth, and when accessing multiple CCs, it may be regarded as a CC of a primary cell and other CCs as CCs of secondary cells. When the synchronization signal detected by the terminal device is the synchronization signal of the CC of the primary cell, assuming that CC1 is the CC of the primary cell, the terminal device determines the center frequency and bandwidth of CC1. After accessing CC1, it can receive the indication information sent by the network device, determine the frequency domain offset values ​​of CC2 and CC3 relative to CC1 according to the indication information, and then determine the values ​​of offset2 and offset3 of the reference signal sequences on CC2 and CC3 relative to the second bandwidth based on the relevant parameters of CC1 and the second bandwidth.

[0117] It should also be understood that when using CA, it is also necessary to consider whether there is protection bandwidth between CCs. In LTE or NR, some blank subcarriers are used as protection bandwidth between different CCs. Figure 6 is a schematic diagram of determining the bias value in another embodiment of the present application, such as Figure 6 As shown, in NR or LTE, if there is a guard bandwidth of N subcarriers between CCs, the frequency domain length of the guard bandwidth (guard band, GB) between CCs needs to be taken into account when calculating the offset value of the reference signal sequence of each CC.

[0118] It should also be understood that the embodiment of the present application only takes the reference signal sequence mapping method similar to LTE as an example, but the embodiment of the present application may also include other reference signal sequences and mapping methods. And the essence of the method of the embodiment of the present application is also applicable to other reference sequences with similar sequence generation and mapping rules, such as other uplink or downlink reference signal sequences. As long as the mapping of the reference signal is related to the number of its RB. The embodiment of the present application is not limited here.

[0119] It should also be understood that the parameters of the second bandwidth and the parameters of the first bandwidth may also include other parameters, which are not limited in the embodiment of the present application.

[0120] Optionally, as an embodiment, the method 100 further includes:

[0121] The terminal device receives second indication information sent by the network device;

[0122] The terminal device determines at least one of the parameters of the second bandwidth according to the second indication information.

[0123] Specifically, during the initial access to the first bandwidth, the terminal device detects the synchronization signal of the first bandwidth. After determining the synchronization signal, since the synchronization signal is at the center frequency of the first bandwidth, the center frequency of the first bandwidth can be determined by detecting the synchronization signal. After that, the parameters of the first bandwidth are obtained according to the broadcast information of the network device.

[0124] As for the parameters of the second bandwidth, the terminal device will receive second indication information sent by the network device, and the second indication information is used by the terminal device to determine at least one of the parameters of the second bandwidth, for example, it may be at least one of the bandwidth value of the second bandwidth, the frequency domain starting position of the second bandwidth, and the center frequency point of the second bandwidth in the parameters of the second bandwidth.

[0125] After the terminal device obtains the parameters of the first bandwidth and the parameters of the second bandwidth, it can determine the offset value of the frequency domain of the first bandwidth relative to the frequency domain of the second bandwidth based on this information, and use the above formula (5) or formula (6) to determine the mapping formula of the reference signal sequence on the first bandwidth, and finally determine the reference signal sequence on the first bandwidth.

[0126] It should be understood that the network device may predefine M (M≥1) types of second bandwidths. For example, the second bandwidth may include one or more of the maximum bandwidth, the cell bandwidth and the wideband CC, the bandwidth after aggregation of multiple CCs, or the wideband BP. The network device may use log2M bits of second indication information to notify the terminal device of the parameters of the second bandwidth. The embodiments of the present application are not limited here.

[0127] It should also be understood that the network device may not predefine the parameters of the second bandwidth. In this case, the network device may send all possible parameter values ​​of the second bandwidth to the terminal device through indication information, and the embodiments of the present application are not limited thereto.

[0128] It should also be understood that when the terminal device determines the frequency domain starting position of the second bandwidth through the second indication information, the network device can configure a frequency domain starting position of the second bandwidth for the terminal device, which is equivalent to configuring a virtual bandwidth for the network device. The virtual bandwidth may be different from the actual second bandwidth or may be the same. At this time, the length of the reference signal sequence is related to the frequency domain starting position of the virtual bandwidth, and the generation length of the reference signal sequence on the wideband or wideband CC or BP where the terminal device accessing the CC for MU-MIMO is located is also related to the frequency domain starting position of the virtual bandwidth. Otherwise, in the same frequency domain, the reference signal sequence values ​​of the terminal devices accessing the CC and the wideband may still be different, and they cannot be configured to be orthogonal. The network device may also predefine one or more virtual bandwidths and configure one of the virtual bandwidths for the terminal device. The terminal device determines the frequency domain starting position of the second bandwidth through the virtual bandwidth and the center frequency of the second bandwidth, and then calculates the frequency domain offset of the frequency domain starting position of the CC and the starting position of the virtual bandwidth. The reference signal sequence generation length on the CC can also be generated according to the virtual bandwidth length.

[0129] Optionally, the resources used to carry the second indication information include: any one of: a broadcast message, a radio resource control (radioresource control, RRC) signaling, a synchronization signal, a synchronization signal block, a media access control layer control element (media access control control element, MAC CE), and downlink control information (downlink control information, DCI).

[0130] It should be understood that the broadcast message may be a master information block (MIB) or a system information block (SIB), or may be other types of broadcast messages, and the embodiments of the present application are not limited thereto.

[0131] Specifically, the terminal device receives the second indication information sent by the network device, and the second indication information can be carried on any one of broadcast signaling, high-layer signaling and physical signaling. It is used to notify the terminal device of the parameters of the second bandwidth. For example, the terminal device can receive the second indication information on UE-specific signaling, UE group specific signaling, cell specific signaling, group common signaling and other signaling.

[0132] It should be understood that the resources used to carry the second indication information may also be other resources or other signaling, and the embodiments of the present application are not limited thereto.

[0133] It should also be understood that the terminal device can also determine other parameters of the second bandwidth through the second indication message, and the embodiments of the present application are not limited here.

[0134] Optionally, as an embodiment, the method 100 further includes:

[0135] The terminal device receives third indication information sent by the network device;

[0136] The terminal device determines at least one of the parameters of the first bandwidth according to the third indication information.

[0137] Specifically, when the terminal device initially accesses the second bandwidth, it detects the synchronization signal of the second bandwidth. After determining the synchronization signal, since the synchronization signal is at the center frequency of the second bandwidth, the center frequency of the second bandwidth can be determined by detecting the synchronization signal. Afterwards, the parameters of the second bandwidth are obtained according to the broadcast information of the network device.

[0138] For the parameters of the first bandwidth, the terminal device will receive a third indication information sent by the network device, and the third indication information is used by the terminal device to determine the parameters of the first bandwidth, for example, it may be at least one of the bandwidth value of the first bandwidth, the frequency domain starting position of the first bandwidth, and the center frequency point of the first bandwidth.

[0139] After the terminal device obtains the parameters of the first bandwidth and the parameters of the second bandwidth, it can determine the offset value of the frequency domain of the first bandwidth relative to the frequency domain of the second bandwidth based on this information, and use the above formula (5) to determine the mapping formula of the reference signal sequence on the first bandwidth, and finally determine the reference signal sequence on the first bandwidth.

[0140] It should be understood that the terminal device may also use other methods to obtain the first bandwidth parameter and the second bandwidth parameter, which are not limited in the embodiments of the present application.

[0141] It should also be understood that the network device may predefine M (M≥1) first bandwidths, for example, the first bandwidth may include one or more bandwidths such as CC, BP, and wideband bandwidth. The network device may use log2M bits of third indication information to notify the terminal device of the parameters of the first bandwidth. The embodiments of the present application are not limited here.

[0142] It should also be understood that the network device may not predefine the parameters of the first bandwidth. In this case, the network device may send all possible parameter values ​​to the terminal device through the third indication information, and the embodiments of the present application are not limited thereto.

[0143] Optionally, the resources used to carry the third indication information include: any one of: a broadcast message, an RRC signaling, a synchronization signal, a synchronization signal block, a MAC CE, and a DCI.

[0144] Specifically, the terminal device receives the third indication information sent by the network device, and the third indication information can be carried on any one of broadcast signaling, high-layer signaling and physical signaling. It is used to notify the terminal device of parameter information of the second bandwidth. For example, the terminal device can receive the third indication information on UE-specific signaling, UE group specific signaling, cell-specific signaling, group common signaling, etc.

[0145] It should be understood that the resources used to carry the third indication information may also be other resources or other signaling, and the embodiments of the present application are not limited thereto.

[0146] It should also be understood that the terminal device can also determine other parameters of the first bandwidth through the third indication message, and the embodiments of the present application are not limited here.

[0147] Optionally, the terminal device can also determine the frequency domain offset value of the first bandwidth relative to the second bandwidth through the second indication information. For example, a certain frequency domain resource unit can be used as a basic unit, and the method of notifying the offset value can be to notify that the offset value is N multiples of the frequency domain resource unit. The frequency domain resource unit can be RB, PRB, resource block group (resourceblock group, RBG), precoding resource block group (precoding resource block group, PRG), etc. The frequency domain resource unit can have multiple candidate values, which are specified by the network device, or the selection of the frequency domain resource unit is related to the identification of CC or wideband CC. The terminal device determines the offset value based on the indication information of the network device and the frequency domain size of the RB in the current system. The embodiments of the present application are not limited here.

[0148] It should be understood that the terminal device accessing the first bandwidth and the terminal device accessing the second bandwidth can also use the third bandwidth as a reference to adjust the offset value in the reference signal mapping formula. For example, the first bandwidth is CC, the second bandwidth is wideband CC, and the third bandwidth can be the cell bandwidth or the maximum bandwidth of the system. The bandwidths of CC and wideband CC are both part of the cell bandwidth or the maximum bandwidth of the system. At this time, the terminal device accessing the first bandwidth and the terminal device accessing the second bandwidth can use the frequency domain starting position of the third bandwidth as a reference to calculate the frequency domain offset value of the first bandwidth relative to the third bandwidth, and the frequency domain offset value of the second bandwidth relative to the third bandwidth, and then obtain the offset value of the reference signal mapping on the first bandwidth and the offset value of the reference signal mapping on the second bandwidth. The method can also configure the terminal device on the first bandwidth and the terminal device on the second bandwidth to do MU-MIMO, as long as the third bandwidth is greater than the first bandwidth and the second bandwidth. The embodiments of the present application are not limited here.

[0149] It should also be understood that in the embodiment of the present application, the above method for determining the reference signal sequence can not only meet the needs of different terminal devices on CC, wideband CC, BP, and cell bandwidth to do MU-MIMO. It can also meet the needs of different terminal devices on the maximum bandwidth of the system to do MU-MIMO. In the new wireless communication system, the reference signals can also be determined according to the method provided in the present application. The embodiment of the present application is not limited here.

[0150] It should also be understood that in the embodiment of the present application, the value of the offset can also be 0. If it is not necessary to support MU-MIMO for users between CC, wideband CC, BP, cell bandwidth and system maximum bandwidth, the offset value offset in the reference signal mapping formula on the above bandwidth can be 0. Therefore, the network device can also indicate whether the terminal device uses the technical solution of the present application according to whether the terminal device on the first bandwidth (CC, BP ​​or wideband CC, etc.) performs MU-MIMO with terminal devices on other bandwidths, that is, whether the offset value offset of the reference signal mapping is 0, or is related to parameters such as the first bandwidth and the second bandwidth. The terminal device can determine whether the reference signal mapping offset value is 0 or needs to be calculated based on the indication information sent by the network device. The network device can use the indication information, for example, the network device uses X (X≥1) bits of indication information to indicate that the offset in the mapping formula is set to 0 at a certain moment or within a certain period of time, or the network device can determine the value of the offset in the mapping formula that the terminal device needs to calculate through the indication information. When the terminal device does not receive the indication information from the network side device, the prior art solution (i.e., the offset value is 0) or the solution of the present application (the offset is calculated based on the first bandwidth and the second bandwidth) can be used by default.

[0151] This embodiment of the present application is not limited here.

[0152] It should also be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not impose any restrictions on the implementation process of the embodiments of the present application.

[0153] In the method for determining a reference signal provided in an embodiment of the present application, after the terminal device determines the parameters of the second bandwidth according to the indication information sent by the network device, the reference signal sequence is determined according to the parameters of the second bandwidth and the parameters of the first bandwidth, so that the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be configured to be the same, orthogonal, or quasi-orthogonal. When different terminal devices access the first bandwidth and the second bandwidth respectively to perform MU-MIMO, the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be configured to be orthogonal or quasi-orthogonal, supporting the terminal devices working on the first bandwidth and the second bandwidth to perform MU-MIMO. Improve user experience.

[0154] The present application also provides a method 200 for determining a reference signal sequence. The method 200 may be performed by a network device. Figure 7 A schematic flow chart of a method 200 for determining a reference signal sequence according to an embodiment of the present application is shown. Figure 7As shown, the method 200 includes:

[0155] S210, the network device sends first indication information to the terminal device, where the first indication information indicates a target resource.

[0156] S220, the network device sends second indication information to the terminal device, where the second indication information is used to indicate at least one of the parameters of the second bandwidth.

[0157] Specifically, in S210, when the terminal device needs to send data on a certain time-frequency resource, the network device will send a first indication information to the terminal device, which is used to indicate a specific time-frequency resource, i.e., a target resource, to the terminal device. The target resource is a resource allocated by the network device to the terminal device, and the terminal device can send or receive data on the target resource. The terminal device can send a reference signal sequence on the target resource, and the reference signal sequence is used for the network device to correctly perform channel estimation, coherent detection and demodulation, so that the network device can correctly demodulate the data of the terminal device.

[0158] In S220, if NR needs to support terminal devices working on wideband (or wideband CC) or BP to perform MU-MIMO with terminal devices working in one CC or using multiple CC aggregations, the network device needs to demodulate the data sent by different terminal devices. At this time, the reference signal sequences sent by different terminal devices need to be configured to be orthogonal or quasi-orthogonal.

[0159] When the terminal device supports terminal devices working on the first bandwidth and terminal devices working on the second bandwidth to perform MU-MIMO, when the terminal device accesses the first bandwidth, it is necessary to determine the reference signal sequence according to the parameters of the first bandwidth and the parameters of the second bandwidth, and send the reference signal sequence on the target resource. The reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be configured to be the same, orthogonal or quasi-orthogonal, which can support terminal devices working on the first bandwidth and the second bandwidth to perform MU-MIMO. Therefore, the network device will send a second indication information to the terminal device, and the second indication information is used for the terminal device to determine the parameters of the second bandwidth.

[0160] When the terminal device accesses the first bandwidth, the terminal device detects the synchronization signal of the first bandwidth. After determining the synchronization signal, since the synchronization signal is at the center frequency of the first bandwidth, the center frequency of the second bandwidth can be determined by detecting the synchronization signal. After that, the network device will notify the other parameters of the first bandwidth through broadcast information. As for the parameters of the second bandwidth, the network device will send second indication information to the terminal device, and the second indication information is used for the terminal device to determine at least one of the parameters of the second bandwidth, for example, it can be at least one of the bandwidth value of the second bandwidth, the frequency domain starting position of the second bandwidth, and the center frequency of the second bandwidth.

[0161] The method for determining the reference signal provided in the embodiment of the present application, by sending indication information for indicating the parameters of the second bandwidth to the terminal device through the network device, can support the terminal device working on the first bandwidth and the terminal device working on the second bandwidth to do MU-MIMO, that is, determine the reference signal sequence according to the parameters of the first bandwidth and the parameters of the second bandwidth, and finally make the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth configured to be the same, orthogonal or quasi-orthogonal, which can support the terminal devices working on the first bandwidth and the second bandwidth to do MU-MIMO. The network device can then correctly parse the data on different terminal devices.

[0162] It should be understood that the target resource is a resource allocated by the network device to the terminal device, and the terminal device can send or receive data on the target resource. The frequency domain of the target resource can be the same as the frequency domain of the first bandwidth, or it can partially overlap with the frequency domain of the first bandwidth. The frequency domain of the target resource can also be a partial frequency domain of the second bandwidth, or a partial frequency domain of the first bandwidth. The embodiment of the present application is not limited here.

[0163] It should also be understood that the first bandwidth may include any one of the working bandwidth of the terminal device and the cell bandwidth serving the terminal device, for example, the first bandwidth may be CC or BP. The second bandwidth may include any one of the maximum system bandwidth, the cell bandwidth, and the broadband carrier bandwidth. The frequency domain of the first bandwidth may be a partial frequency domain of the second bandwidth, and the bandwidth value of the first bandwidth may be less than the bandwidth value of the second bandwidth. The embodiments of the present application are not limited here.

[0164] Optionally, the resources used to carry the second indication information include: any one of: a broadcast message, an RRC signaling, a synchronization signal, a synchronization signal block, a MAC CE, and a DCI.

[0165] Specifically, when the network device sends the second indication information to the terminal device, the second indication information can be carried on any one of broadcast signaling, high-layer signaling and physical signaling. Parameter information used to notify the terminal device of the second bandwidth. For example, the network device can use UE-specific signaling, UE group specific signaling, cell-specific signaling, group common signaling and other signaling to carry the second indication information.

[0166] It should be understood that the resources used to carry the second indication information may also be other resources or other signaling, and the embodiments of the present application are not limited thereto.

[0167] It should also be understood that the network device may also notify other parameters of the second bandwidth through the second indication message, and the embodiment of the present application does not limit this.

[0168] It should also be understood that the network device may predefine M (M≥1) types of second bandwidths. For example, the bandwidth of the second bandwidth may include one or more of the maximum bandwidth, the cell bandwidth or the wideband bandwidth, the bandwidth after aggregation of multiple CCs, or the broadband BP bandwidth. The network device may use the second indication information of log2M bits to notify the terminal device of at least one of the parameters of the second bandwidth. The embodiments of the present application are not limited here.

[0169] It should also be understood that the network device may not predefine the parameters of the second bandwidth. In this case, the network device may send all possible parameter values ​​to the terminal device through indication information, and the embodiments of the present application are not limited thereto.

[0170] Optionally, as an embodiment, the method 200 further includes:

[0171] The network device sends third indication information to the terminal device, where the third indication information is used to indicate at least one of the parameters of the first bandwidth.

[0172] Specifically, when the terminal device accesses the second bandwidth, the terminal device detects the synchronization signal of the second bandwidth. After determining the synchronization signal, since the synchronization signal is at the center frequency of the second bandwidth, the center frequency of the second bandwidth can be determined by detecting the synchronization signal. After that, the network device will notify the other parameters of the second bandwidth through broadcast information. As for the parameters of the first bandwidth, the network device will send a third indication information to the terminal device, and the third indication information is used for the terminal device to determine the parameters of the first bandwidth, for example, it can be at least one of the bandwidth value of the first bandwidth, the frequency domain starting position of the first bandwidth, and the chip frequency domain starting position of the first bandwidth.

[0173] Optionally, the resources used to carry the third indication information include: any one of: a broadcast message, an RRC signaling, a synchronization signal, a synchronization signal block, a MAC CE, and a DCI.

[0174] Specifically, when the network device sends the third indication information to the terminal device, the third indication information can be carried on any one of broadcast signaling, high-layer signaling and physical signaling. Parameter information used to notify the terminal device of the first bandwidth. For example, the network device can use UE-specific signaling, UE group specific, cell specific signaling, group common and other signaling to carry the third indication information.

[0175] It should be understood that the resources used to carry the third indication information may also be other resources or other signaling, and the embodiments of the present application are not limited thereto.

[0176] It should also be understood that the network device may also notify other parameter information of the first bandwidth through the third indication message, and the embodiment of the present application does not limit this.

[0177] It should also be understood that the network device may predefine M (M≥1) first bandwidths, which may include one or more bandwidths such as CC, BP, and wideband bandwidths, and the network device may use log2M bits of third indication information to notify the terminal device of the parameters of the first bandwidth. The embodiments of the present application are not limited here.

[0178] It should be understood that the frequency domain of the target resource may be the same as the frequency domain of the first bandwidth, or may partially overlap with the frequency domain of the first bandwidth. The frequency domain of the target resource may also be a partial frequency domain of the second bandwidth, or a partial frequency domain of the first bandwidth. The embodiment of the present application is not limited here.

[0179] Optionally, as an embodiment, the first bandwidth may include any one of the working bandwidth of the terminal device, the cell bandwidth serving the terminal device, and the carrier bandwidth. For example, the first bandwidth may be a CC, multiple CCs after carrier aggregation, BP, cell bandwidth, system maximum bandwidth, etc. The second bandwidth may include any one of the system maximum bandwidth, cell bandwidth, and broadband carrier bandwidth. The frequency domain of the first bandwidth may be part of the frequency domain of the second bandwidth, or the frequency domain of the first bandwidth overlaps part of the frequency domain of the second bandwidth, and the bandwidth value of the first bandwidth may be less than or equal to the bandwidth value of the second bandwidth. The embodiments of the present application are not limited here.

[0180] Optionally, as an embodiment, the parameters of the second bandwidth include at least one of the following parameters: a center frequency point of the second bandwidth, a bandwidth value of the second bandwidth, and a frequency domain starting position of the second bandwidth.

[0181] Optionally, as an embodiment, the parameters of the first bandwidth include at least one of the following parameters: a center frequency point of the first bandwidth, a bandwidth value of the first bandwidth, and a frequency domain starting position of the first bandwidth.

[0182] Specifically, the method for generating the reference signal on the first bandwidth may be the same as or different from the method for generating the reference signal on the second bandwidth, or the length of the reference signal sequence generated by the two needs to be generated according to the maximum value of the bandwidths of the two or another larger bandwidth value. That is, the length of the reference signal generated on the first bandwidth is generated according to the second bandwidth, or the reference signal on the first bandwidth and the reference signal sequence on the second bandwidth are both generated according to the maximum bandwidth. To make the reference sequences of the overlapping parts of the first bandwidth and the second bandwidth in the frequency domain be configured to be the same, orthogonal or quasi-orthogonal, since the starting positions of the frequency domains of the first bandwidth and the second bandwidth may be different, it can be regarded that the starting position of the frequency domain of the first bandwidth has an offset value compared to the starting position of the frequency domain of the second bandwidth, corresponding to the mapping formula of the reference signal sequence, that is, the mapping formula of the reference signal sequence on the first bandwidth has an offset value compared to the mapping formula of the reference signal sequence on the second bandwidth. The parameters of the first bandwidth include at least one of the following parameters: the center frequency of the first bandwidth, the bandwidth value of the first bandwidth, and the starting position of the frequency domain of the first bandwidth. The offset value is related to the parameters of the first bandwidth and the parameters of the second bandwidth. The parameters of the second bandwidth include at least one of a central frequency point of the second bandwidth, a bandwidth value of the second bandwidth, and a frequency domain starting position of the second bandwidth.

[0183] According to the parameters of the first bandwidth and the parameters of the second bandwidth, the offset value of the starting position of the first bandwidth relative to the second bandwidth in the frequency domain can be determined, and a mapping formula for the reference signal sequence on the first bandwidth can be obtained. The reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be made the same through their respective mapping formulas, so that the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be configured to be orthogonal or quasi-orthogonal.

[0184] Optionally, the network device may notify the terminal device of the frequency domain offset value of the first bandwidth relative to the second bandwidth through a second indication message. For example, a certain frequency domain resource unit may be used as a basic unit, and the method of notifying the offset value may be to notify that the offset value is N multiples of the frequency domain resource unit. The frequency domain resource unit may be an RB, a PRB, a RBG, a PRG, etc. The frequency domain resource unit may have multiple candidate values, which are specified by the network device, or the selection of the frequency domain resource unit may be related to the identification of the CC or the wideband CC. The terminal device determines the offset value based on the indication information of the network device and the frequency domain size of the RB in the current system. The embodiments of the present application are not limited here.

[0185] It should also be understood that the network device may also send indication information to the terminal device to inform whether multiple terminal devices are required to perform MU-MIMO. For example, the network device may use X (X ≥ 1) bits of indication information to indicate that the offset in the mapping formula is set to 0 at a certain moment or within a certain period of time. Alternatively, the network device may determine through the indication information that the terminal device needs to calculate the value of the offset in the mapping formula. The embodiments of the present application are not limited here.

[0186] It should also be understood that in each embodiment of the present application, the size of the serial number of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not impose any limitations on the implementation process of the embodiments of the present application.

[0187] The method for determining the reference signal provided in the embodiment of the present application, by sending the second indication information indicating the parameters of the second bandwidth and the third indication information indicating the parameters of the first bandwidth to the terminal device through the network device, can support the terminal device working on the first bandwidth and the terminal device working on the second bandwidth to do MU-MIMO, that is, determine the reference signal sequence according to the parameters of the first bandwidth and the parameters of the second bandwidth, and finally make the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth configured to be the same, orthogonal or quasi-orthogonal, and support the terminal devices working on the first bandwidth and the second bandwidth to do MU-MIMO. The network device can then correctly parse the data on different terminal devices.

[0188] Combination of the above Figures 1 to 7 , describes in detail the method for determining the reference signal sequence in the embodiment of the present application, and will now be combined with Figures 8 to 11 , describe in detail the terminal device and network device of the embodiment of the present application.

[0189] Figure 8 It is a schematic block diagram of a terminal device of an embodiment of the present application. It should be understood that the terminal device embodiment corresponds to the method embodiment, and similar descriptions can refer to the method embodiment. Figure 8 The terminal device 300 shown can be used to perform the corresponding Figure 3 The terminal device 300 includes: a processor 310, a memory 320 and a transceiver 330, wherein the processor 310, the memory 320 and the transceiver 330 are connected via communication, the memory 320 stores instructions, the processor 310 is used to execute the instructions stored in the memory 320, and the transceiver 330 is used to perform specific signal transmission and reception under the drive of the processor 310.

[0190] The transceiver 330 is used to receive first indication information sent by the network device;

[0191] The processor 310 is configured to determine a target resource according to the first indication information;

[0192] The processor 310 is further configured to determine a reference signal sequence according to a parameter of the first bandwidth and a parameter of the second bandwidth;

[0193] The transceiver 330 is further configured to send or receive the reference signal sequence on the target resource.

[0194] The terminal device provided in the embodiment of the present application can determine the reference signal sequence according to the parameters of the first bandwidth and the parameters of the second bandwidth, so that the reference signal sequence on the first bandwidth is the same as the reference signal sequence on the second bandwidth. When different terminal devices respectively access the first bandwidth and the second bandwidth to perform MU-MIMO, the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth can be configured to be the same, orthogonal or quasi-orthogonal, thereby supporting terminal devices working on the first bandwidth and the second bandwidth to perform MU-MIMO and improving user experience.

[0195] The various components in the terminal device 300 are connected by communication, that is, the processor 310, the memory 320 and the transceiver 330 communicate with each other through the internal connection path to transmit control and / or data signals. The above method embodiments of the present application can be applied to the processor, or the steps of the above method embodiments are implemented by the processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the above method embodiments can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a central processing unit (CPU), a network processor (NP) or a combination of CPU and NP, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in this application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0196] Optionally, in another embodiment of the present application, the parameters of the second bandwidth include at least one of the following parameters: a center frequency point of the second bandwidth, a bandwidth value of the second bandwidth, and a frequency domain starting position of the second bandwidth.

[0197] Optionally, in another embodiment of the present application, the parameters of the first bandwidth include at least one of the following parameters: a center frequency point of the first bandwidth, a bandwidth value of the first bandwidth, and a frequency domain starting position of the first bandwidth.

[0198] Optionally, in another embodiment of the present application, the transceiver 330 is further configured to receive second indication information sent by the network device;

[0199] The processor 310 is further configured to determine at least one of the parameters of the second bandwidth according to the second indication information.

[0200] Optionally, in another embodiment of the present application, the transceiver 330 is further configured to receive third indication information sent by the network device;

[0201] The processor 310 is further configured to determine at least one of the parameters of the first bandwidth according to the third indication information.

[0202] Optionally, in another embodiment of the present application, the processor 310 is specifically used to determine the reference signal sequence according to the parameters of the first bandwidth, the parameters of the second bandwidth, and the subcarrier spacing.

[0203] Optionally, in another embodiment of the present application, the frequency domain of the target resource determined by the processor 330 is the same as or partially overlaps with the frequency domain of the first bandwidth.

[0204] Optionally, in another embodiment of the present application, the bandwidth value of the first bandwidth is smaller than the bandwidth value of the second bandwidth.

[0205] Optionally, in another embodiment of the present application, the first bandwidth is any one of the working bandwidth, service cell bandwidth and carrier bandwidth of the terminal device; the second bandwidth is any one of the system maximum bandwidth, cell bandwidth and broadband carrier bandwidth.

[0206] It should be noted that in the embodiment of the present application, the processor 310 may be implemented by a processing module, the memory 320 may be implemented by a storage module, and the transceiver 330 may be implemented by a transceiver module, such as Fig. 9 As shown, the terminal device 400 may include a processing module 410 , a storage module 420 and a transceiver module 430 .

[0207] Figure 8 The terminal device 300 or Fig. 9 The terminal device 400 shown can implement the aforementioned Figure 3 The steps performed by the terminal device in the example are not described here to avoid repetition.

[0208] Fig.10 FIG. 5 is a schematic block diagram of a network device 500 according to an embodiment of the present application. It should be understood that the network device embodiment and the method embodiment correspond to each other, and similar descriptions can refer to the method embodiment, such as Fig.10 As shown, the network device 500 includes: a processor 510, a memory 520 and a transceiver 530. The processor 510, the memory 520 and the transceiver 530 are connected via communication. The memory 520 stores instructions. The processor 510 is used to execute the instructions stored in the memory 520. The transceiver 530 is used to perform specific signal transmission and reception under the drive of the processor 510.

[0209] The transceiver 530 is used to send first indication information to the terminal device, where the first indication information is used to indicate the target resource;

[0210] The transceiver 530 is further used to send second indication information to the terminal device, where the second indication information is used to indicate at least one of the parameters of the second bandwidth.

[0211] The network device provided in the embodiment of the present application can support UEs working on the first bandwidth and UEs working on the second bandwidth to perform MU-MIMO by sending indication information for indicating the parameters of the second bandwidth to the terminal device through the network device, that is, determine the reference signal sequence according to the parameters of the first bandwidth and the parameters of the second bandwidth, and finally configure the reference signal sequence on the first bandwidth and the reference signal sequence on the second bandwidth to be the same, orthogonal or quasi-orthogonal, and support the terminal devices working on the first bandwidth and the second bandwidth to perform MU-MIMO. The network device can then correctly parse the data on different terminal devices.

[0212] The various components in the network device 500 are connected by communication, that is, the processor 510, the memory 520 and the transceiver 530 communicate with each other through the internal connection path to transmit control and / or data signals. It should be noted that the above method embodiments of the present application can be applied to the processor, or the steps of the above method embodiments are implemented by the processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the above method embodiments can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a central processing unit CPU, NP or a combination of CPU and NP, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component. The methods, steps and logic block diagrams disclosed in this application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the present application can be directly embodied as a hardware decoding processor to be executed, or a combination of hardware and software modules in the decoding processor can be executed. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0213] Optionally, in another embodiment of the present application, the transceiver 530 is further used to send third indication information to the terminal device, where the third indication information is used to indicate at least one of the parameters of the first bandwidth.

[0214] Optionally, in another embodiment of the present application, the parameters of the second bandwidth and the parameters of the first bandwidth are used by the terminal device to determine a reference signal sequence and send the reference signal sequence on the target resource.

[0215] Optionally, in another embodiment of the present application, the parameters of the second bandwidth include at least one of the following parameters: a center frequency point of the second bandwidth, a bandwidth value of the second bandwidth, and a frequency domain starting position of the second bandwidth.

[0216] Optionally, in another embodiment of the present application, the parameters of the first bandwidth include at least one of the following parameters: a center frequency point of the first bandwidth, a bandwidth value of the first bandwidth, and a frequency domain starting position of the first bandwidth.

[0217] Optionally, in another embodiment of the present application,

[0218] Optionally, in another embodiment of the present application, the frequency domain of the target resource is the same as or partially overlaps with the frequency domain of the first bandwidth. The bandwidth value of the first bandwidth is smaller than the bandwidth value of the second bandwidth.

[0219] Optionally, in another embodiment of the present application, the first bandwidth is any one of the working bandwidth, service cell bandwidth and carrier bandwidth of the terminal device; the second bandwidth is any one of the system maximum bandwidth, cell bandwidth and broadband carrier bandwidth.

[0220] It should be noted that in the embodiment of the invention, the processor 510 may be implemented by a processing module, the memory 520 may be implemented by a storage module, and the transceiver 530 may be implemented by a transceiver module, such as Fig.11 As shown, the network device 600 may include a processing module 610 , a storage module 620 and a transceiver module 630 .

[0221] Fig.10 The network device 500 or Fig.11 The network device 600 shown can implement the aforementioned Figure 7 The steps performed by the network devices in the example are not described here to avoid repetition.

[0222] The present application also provides a computer-readable medium for storing computer program code, the computer program including a computer program for executing the above Figure 3 and Figure 7 The readable medium may be a read-only memory (ROM) or a random access memory (RAM), which is not limited in the embodiments of the present application.

[0223] An embodiment of the present application also provides a communication system, which includes the terminal device provided by the above embodiment of the present application and the network device provided by the above embodiment of the present application. The communication system can complete any method for determining a reference signal sequence provided by the embodiment of the present application.

[0224] It should be understood that the terms "and / or" and "at least one of A or B" in this document are only used to describe the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects before and after are in an "or" relationship.

[0225] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0226] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0227] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0228] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0229] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0230] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, ROM, random access memories, RAM, magnetic disks, or optical disks.

[0231] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for determining a reference signal sequence, characterized in that: include: Receiving first indication information from a network device, where the first indication information is used to determine a target resource; Determine a reference signal sequence according to an offset value N, where N is the number of the physical resource block RB with the smallest number in the bandwidth part; The reference signal sequence is sent on the target resource, or a reference signal corresponding to the reference signal sequence is received on the target resource.

2. The method according to claim 1, characterized in that The offset value N is the number of RBs that the RB with the smallest number in the bandwidth part is offset from the RB with number 0.

3. The method according to claim 1 or 2, characterized in that: Also includes: Second indication information is received from a network device, where the second indication information is used to determine a frequency domain starting position of an RB numbered 0.

4. The method according to any one of claims 1 to 3, characterized in that The determining of the reference signal sequence according to the offset value N comprises: The reference signal sequence is determined according to the offset value N and the subcarrier spacing.

5. The method according to any one of claims 1 to 4, characterized in that The frequency domain of the target resource is the same as the frequency domain of the bandwidth part; or, The frequency domain of the target resource is a partial frequency domain of the bandwidth part.

6. The method according to any one of claims 1 to 5, characterized in that The reference signal corresponding to the reference signal sequence is identical to, orthogonal to, or quasi-orthogonal to another reference signal carried in the frequency domain of the target resource.

7. A method for determining a reference signal sequence, characterized in that: include: Sending first indication information to the terminal device, where the first indication information is used to determine the target resource; Determine a reference signal sequence according to an offset value N, where N is the number of the physical resource block RB with the smallest number in the bandwidth part; The reference signal sequence is sent on the target resource, or a reference signal corresponding to the reference signal sequence is received on the target resource.

8. The method according to claim 7, characterized in that The offset value N is the number of RBs that the RB with the smallest number in the bandwidth part is offset from the RB with number 0.

9. The method according to claim 7 or 8, characterized in that: Also includes: Send second indication information to the terminal device, where the second indication information is used to determine the frequency domain starting position of the RB numbered 0.

10. The method according to any one of claims 7 to 9, characterized in that The determining of the reference signal sequence according to the offset value N comprises: The reference signal sequence is determined according to the offset value N and the subcarrier spacing.

11. The method according to any one of claims 7 to 10, characterized in that The frequency domain of the target resource is the same as the frequency domain of the bandwidth part; or, The frequency domain of the target resource is a partial frequency domain of the bandwidth part.

12. The method according to any one of claims 7 to 11, characterized in that The reference signal corresponding to the reference signal sequence is identical to, orthogonal to, or quasi-orthogonal to another reference signal carried in the frequency domain of the target resource.

13. A device for determining a reference signal sequence, characterized in that: include: A module for receiving first indication information from a network device, wherein the first indication information is used to determine a target resource; A module for determining a reference signal sequence according to an offset value N, wherein N is the number of the physical resource block RB with the smallest number in the bandwidth part; A module configured to send the reference signal sequence on the target resource, or receive a reference signal corresponding to the reference signal sequence on the target resource.

14. The device according to claim 13, characterized in that The offset value N is the number of RBs that the RB with the smallest number in the bandwidth part is offset from the RB with number 0.

15. The device according to claim 13 or 14, characterized in that Also includes: A module for receiving second indication information from a network device, wherein the second indication information is used to determine a frequency domain starting position of an RB numbered 0.

16. The device according to any one of claims 13 to 15, characterized in that The module for determining the reference signal sequence according to the offset value N is specifically used for: The reference signal sequence is determined according to the offset value N and the subcarrier spacing.

17. The device according to any one of claims 13 to 16, characterized in that The frequency domain of the target resource is the same as the frequency domain of the bandwidth part; or, The frequency domain of the target resource is a partial frequency domain of the bandwidth part.

18. The device according to any one of claims 13 to 17, characterized in that The reference signal corresponding to the reference signal sequence is identical to, orthogonal to, or quasi-orthogonal to another reference signal carried in the frequency domain of the target resource.

19. A device for determining a reference signal sequence, characterized in that: include: A module for sending first indication information to a terminal device, wherein the first indication information is used to determine a target resource; A module for determining a reference signal sequence according to an offset value N, wherein N is the number of the physical resource block RB with the smallest number in the bandwidth part; A module configured to send the reference signal sequence on the target resource, or receive a reference signal corresponding to the reference signal sequence on the target resource.

20. The device according to claim 19, characterized in that The offset value N is the number of RBs that the RB with the smallest number in the bandwidth part is offset from the RB with number 0.

21. The device according to claim 19 or 20, characterized in that Also includes: A module for sending second indication information to a terminal device, wherein the second indication information is used to determine the frequency domain starting position of an RB numbered 0.

22. The device according to any one of claims 19 to 21, characterized in that The module for determining the reference signal sequence according to the offset value N is specifically used for: The reference signal sequence is determined according to the offset value N and the subcarrier spacing.

23. The device according to any one of claims 19 to 22, characterized in that The frequency domain of the target resource is the same as the frequency domain of the bandwidth part; or, The frequency domain of the target resource is a partial frequency domain of the bandwidth part.

24. The device according to any one of claims 19 to 23, characterized in that The reference signal corresponding to the reference signal sequence is identical to, orthogonal to, or quasi-orthogonal to another reference signal carried in the frequency domain of the target resource.

25. A communication device, characterized in that: The device comprises a processor, wherein the processor is configured to cause the communication device to perform the method according to any one of claims 1 to 6, or to cause the communication device to perform the method according to any one of claims 7 to 12.

26. A computer-readable storage medium, characterized in that: The computer-readable storage medium comprises instructions, which, when executed, enable the method according to any one of claims 1 to 6 to be implemented, or enable the method according to any one of claims 7 to 12 to be implemented.

27. A computer program product, characterized in that The computer program product comprises instructions, which, when executed, enable the method according to any one of claims 1 to 6 to be implemented, or enable the method according to any one of claims 7 to 12 to be implemented.

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