SRS signaling in 5G new air interface wireless communications

Abstract

The present disclosure relates to SRS signaling in 5G new air interface wireless communications. A base station is configured to determine a sounding reference signal (SRS) configuration having a plurality of cyclic shifts for a comb-shaped 8SRS, a plurality of user equipment (UE) ports for transmitting the comb-shaped 8SRS, and a mapping of the plurality of cyclic shifts to the plurality of UE ports. The base station is further configured to transmit the SRS configuration to the UE.

Description

[0001] This application is a divisional application of the invention patent application with application date of August 5, 2021, application number 202180012832.3, and titled "SRS Signaling in 5G New Air Interface Wireless Communications". Background Art

[0002] When establishing a network connection, such as a connection to a 5G New Radio (NR) network, a user equipment (UE) transmits a sounding reference signal (SRS) to a next generation Node B (gNB) to inform the gNB of uplink channel conditions. Based on the received SRS signal, the gNB may configure the UE with physical resources for communication between the UE and the gNB. Summary of the invention

[0003] Some example embodiments relate to a processor of a base station configured to perform operations including determining a sounding reference signal (SRS) configuration and transmitting the SRS configuration to a UE, the SRS configuration having a plurality of cyclic shifts for a comb 8 SRS (comb8SRS), a plurality of user equipment (UE) ports for transmitting the comb 8SRS, and a mapping of the plurality of cyclic shifts to the plurality of UE ports.

[0004] Other exemplary embodiments relate to a base station having: a transceiver configured to communicate with a user equipment (UE); and a processor communicatively coupled to the transceiver and configured to perform operations. The operations include determining a sounding reference signal (SRS) configuration and transmitting the SRS configuration to the UE, the SRS configuration having a plurality of cyclic shifts for a comb-shaped 8SRS, a plurality of user equipment (UE) ports for transmitting the comb-shaped 8SRS, and a mapping of the plurality of cyclic shifts to the plurality of UE ports.

[0005] Additional exemplary embodiments relate to a processor of a base station configured to perform operations including determining a resource block (RB) level fractional frequency sounding (RPFS) configuration and transmitting the RPFS configuration to a UE, the RB level RPFS configuration having a configured subband size, an RPFS factor to be applied to the configured subband size, a reduced subband size based on the configured subband size and the RPFS factor, and a resulting sounding reference signal (SRS) sequence length based on the configured subband size and the RPFS factor.

[0006] Additional exemplary embodiments relate to a base station having: a transceiver configured to communicate with a user equipment (UE); and a processor communicatively coupled to the transceiver and configured to perform operations. The operations include determining a resource block (RB) level fractional frequency sounding (RPFS) configuration and transmitting the RPFS configuration to the UE, the RB level RPFS configuration having a configured subband size, an RPFS factor to be applied to the configured subband size, a reduced subband size based on the configured subband size and the RPFS factor, and a resulting sounding reference signal (SRS) sequence length based on the configured subband size and the RPFS factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 Exemplary network arrangements are shown according to various exemplary embodiments.

[0008] Figure 2 An exemplary user equipment (UE) is shown in accordance with various exemplary embodiments.

[0009] Figure 3 An exemplary base station according to various exemplary embodiments is shown.

[0010] Figure 4 Methods of configuring a comb-8 sounding reference signal (SRS) according to various exemplary embodiments are shown.

[0011] Figure 5 Methods of configuring resource block (RB) level fractional frequency sounding (RPFS) for SRS transmission according to various exemplary embodiments are shown. DETAILED DESCRIPTION

[0012] The exemplary embodiments may be further understood with reference to the following description and associated drawings, wherein like elements have the same reference numerals. The exemplary embodiments relate to a sounding reference signal (SRS) configured to support comb 8 and resource block (RB) level fractional frequency sounding (RPFS).

[0013] The exemplary embodiments are described with respect to UE. However, reference to UE is provided for illustration purposes only. The exemplary embodiments may be used with any electronic component that can establish a connection with a network and is configured with hardware, software and / or firmware for exchanging information and data with the network. Therefore, UE as described herein is used to represent any suitable electronic component.

[0014] In addition, the exemplary embodiments are described with reference to a 5G New Radio (NR) network. However, reference to a 5G NR network is provided for illustrative purposes only. The exemplary embodiments may be used with any network that implements the functionality described herein.

[0015] To provide more flexibility to 5G NR networks in configuring SRS transmissions, it was agreed in 3GPP Release 16 that SRS transmissions can be transmitted in any symbol of a slot. However, SRS transmissions have been restricted to Comb 1, Comb 2, or Comb 4, thus limiting the number of UEs that can be multiplexed by the gNB.

[0016] According to some exemplary embodiments, the gNB configures comb-8SRS transmission and configures cyclic shift, number of ports, and mapping of cyclic shift to number of ports for comb-8SRS transmission.

[0017] Another limitation of current SRS configuration is that SRS transmission can only be transmitted in consecutive physical resource blocks (PRBs), which limits the number of UEs that can be multiplexed in the same bandwidth.

[0018] According to another exemplary embodiment, the gNB configures an RPFS factor for the UE for the UE to determine the PRB subset on which to transmit the SRS, thereby allowing more UEs to be multiplexed on the same bandwidth.

[0019] Figure 1 An exemplary network arrangement 100 according to various exemplary embodiments is shown. The exemplary network arrangement 100 includes a UE 110. It should be noted that any number of UEs may be used in the network arrangement 100. Those skilled in the art will appreciate that the UE 110 may be any type of electronic component configured to communicate via a network, such as a mobile phone, a tablet computer, a desktop computer, a smart phone, a phablet, an embedded device, a wearable device, an Internet of Things (IoT) device, etc. It should also be appreciated that an actual network arrangement may include any number of UEs used by any number of users. Therefore, for purposes of illustration, only an example with a single UE 110 is provided.

[0020] UE 110 may be configured to communicate with one or more networks. In the example of network configuration 100, the networks with which UE 110 may wirelessly communicate are 5G New Radio (NR) radio access network (5GNR-RAN) 120, LTE radio access network (LTE-RAN) 122, and wireless local area network (WLAN) 124. However, it should be understood that UE 110 may also communicate with other types of networks, and UE 110 may also communicate with the network through a wired connection. Therefore, UE 110 may include a 5G NR chipset that communicates with 5G NR-RAN 120, an LTE chipset that communicates with LTE-RAN 122, and an ISM chipset that communicates with WLAN 124.

[0021] 5G NR-RAN 120 and LTE-RAN 122 may be parts of cellular networks that may be deployed by cellular providers (e.g., Verizon, AT&T, T-Mobile, etc.). These networks 120, 122 may include, for example, cells or base stations (NodeB, eNodeB, HeNB, eNBS, gNB, gNodeB, macrocell base stations, microcell base stations, small cell base stations, femtocell base stations, etc.) configured to send and receive traffic from UEs equipped with appropriate cellular chipsets. WLAN 124 may include any type of wireless local area network (WiFi, hotspot, IEEE 802.11x network, etc.).

[0022] The UE 110 may be connected to the 5G NR-RAN 120 via a gNB 120A and / or a gNB 120B. The gNBs 120A and 120B may be configured with the necessary hardware (e.g., antenna arrays), software, and / or firmware to perform massive multiple-input multiple-output (MIMO) functionality. Massive MIMO may refer to a base station configured to generate multiple beams for multiple UEs. During operation, the UE 110 may be within range of multiple gNBs. Reference to two gNBs 120A, 120B is for illustrative purposes only. The exemplary embodiments may apply to any appropriate number of gNBs. In addition, the UE 110 may communicate with an eNB 122A of the LTE-RAN 122 to transmit and receive control information for downlink and / or uplink synchronization of the connection with respect to the 5G NR-RAN 120.

[0023] Those skilled in the art will appreciate that any relevant process may be performed for the UE 110 to connect to the 5G NR-RAN 120. For example, as described above, the 5G NR-RAN 120 may be associated with a particular cellular provider, where the UE 110 and / or its user has a protocol and credential information (e.g., stored on a SIM card). Upon detecting the presence of the 5G NR-RAN 120, the UE 110 may transmit corresponding credential information in order to associate with the 5G NR-RAN 120. More specifically, the UE 110 may be associated with a particular base station (e.g., gNB 120A of the 5G NR-RAN 120).

[0024] In addition to the networks 120, 122, and 124, the network arrangement 100 includes a cellular core network 130, the Internet 140, an IP multimedia subsystem (IMS) 150, and a network service backbone 160. The cellular core network 130 can be viewed as an interconnected collection of components that manage the operation and traffic of the cellular network. The cellular core network 130 also manages the traffic flowing between the cellular network and the Internet 140. The IMS 150 can be generally described as an architecture for delivering multimedia services to the UE 110 using the IP protocol. The IMS 150 can communicate with the cellular core network 130 and the Internet 140 to provide multimedia services to the UE 110. The network service backbone 160 communicates directly or indirectly with the Internet 140 and the cellular core network 130. The network service backbone 160 can be generally described as a set of components (e.g., servers, network storage arrangements, etc.) that implement a set of services that can be used to extend the functionality of the UE 110 to communicate with various networks.

[0025] Figure 2 An exemplary UE 110 is shown according to various exemplary embodiments. Figure 1 100 is used to describe the UE 110. The UE 110 may represent any electronic device and may include a processor 205, a memory arrangement 210, a display device 215, an input / output (I / O) device 220, a transceiver 225, and other components 230. The other components 230 may include, for example, an audio input device, an audio output device, a battery providing a limited power source, a data acquisition device, a port for electrically connecting the UE 110 to other electronic devices, one or more antenna panels, etc. For example, the UE 110 may be coupled to industrial equipment via one or more ports.

[0026] Processor 205 may be configured to execute multiple engines of UE 110. For example, the engines may include SRS management engine 235. SRS engine 235 may perform various operations related to receiving an SRS configuration transmission from gNB 120A (or 120B) and transmitting the SRS to the gNB.

[0027] The above-described engine as an application (e.g., program) executed by the processor 205 is merely exemplary. The functions associated with the engine may also be represented as an independent combined component of the UE 110, or may be a modular component coupled to the UE 110, for example, an integrated circuit with or without firmware. For example, an integrated circuit may include an input circuit for receiving a signal and a processing circuit for processing the signal and other information. The engine may also be embodied as an application or multiple separate applications. In addition, in some UEs, the functionality described for the processor 205 is shared between two or more processors such as a baseband processor and an application processor. The exemplary embodiments may be implemented in any of these or other configurations of the UE.

[0028] The memory arrangement 210 may be a hardware component configured to store data related to operations performed by the UE 110. The display device 215 may be a hardware component configured to display data to a user, and the I / O device 220 may be a hardware component that enables user input. The display device 215 and the I / O device 220 may be separate components or may be integrated together (such as a touch screen). The transceiver 225 may be a hardware component configured to establish a connection with the 5G NR-RAN 120, LTE-RAN 122, WLAN 124, etc. Thus, the transceiver 225 may operate on multiple different frequencies or channels (e.g., a continuous set of frequencies).

[0029] Figure 3 An exemplary network base station, in this case gNB 120A, is shown according to various exemplary embodiments. gNB 120A may represent any access node that a UE 110 of a 5G NR network may use to establish a connection. Figure 3 The gNB 120A shown may also represent gNB 120B.

[0030] The gNB 120A may include a processor 305, a memory arrangement 310, an input / output (I / O) device 320, a transceiver 325, and other components 330. The other components 330 may include, for example, a power supply, a data acquisition device, a port for electrically connecting the gNB 120A to other electronic devices, and the like.

[0031] The processor 305 may be configured to execute multiple engines of the gNB 120A. For example, the engines may include an SRS management engine 335 for performing operations including configuring comb 8 SRS and / or RE level fractional frequency sounding (RPFS) for SRS transmissions of the UE 110. An example of this process is described in more detail below.

[0032] The engine described above as an application (e.g., program) executed by the processor 305 is merely exemplary. The functionality associated with the engine may also be represented as a stand-alone integrated component of the gNB 120A, or may be a modular component coupled to the gNB 120A, such as an integrated circuit with or without firmware. For example, an integrated circuit may include input circuitry for receiving signals and processing circuitry for processing signals and other information. In addition, in some gNBs, the functionality described for the processor 305 is split between multiple processors (e.g., a baseband processor, an application processor, etc.). The exemplary aspects may be implemented in any of these or other configurations of the gNB.

[0033] The memory 310 may be a hardware component configured to store data related to operations performed by the UE 110, 112. The I / O device 320 may be a hardware component or port that enables a user to interact with the gNB 120A. The transceiver 325 may be a hardware component configured to exchange data with the UE 110 and any other UE in the system 100. The transceiver 325 may operate on a variety of different frequencies or channels (e.g., a set of continuous frequencies). Thus, the transceiver 325 may include one or more components (e.g., radio components) to enable data exchange with various networks and UEs.

[0034] Figure 4 A method 400 of configuring a Comb-8 Sounding Reference Signal (SRS) for a UE 110 is shown according to various exemplary embodiments. At 405, the gNB 120A (or 120B) configures the number of cyclic shifts (phase ramps) for Comb-8 SRS transmission. In some embodiments, the gNB 120A configures a maximum of 6 cyclic shifts (0, 1, 2, 3, 4, and 5) for the UE 110, regardless of the SRS sequence length. In some embodiments, the gNB 120A may configure the maximum number of cyclic shifts based on the SRS sequence length to advantageously allow a greater number of ports to be configured for SRS transmission. For example, in some embodiments, if the SRS sequence length is an integer multiple of 6 instead of an integer multiple of 8 or 12, the gNB 120A may be able to configure a maximum of 6 cyclic shifts for the UE 110. If the SRS sequence length is an integer multiple of 8 instead of an integer multiple of 12, the gNB 120A can configure a maximum of 8 cyclic shifts (0, 1, 2, 3, 4, 5, 6, 7) for the UE 110. If the SRS sequence length is an integer multiple of 12, the gNB 120A can configure a maximum of 12 cyclic shifts (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11) for the UE 110. In some embodiments, the minimum SRS subband size is configured as 8 PRBs instead of the minimum of 4 PRBs specified by the current 3GPP standard. In such embodiments, the gNB 120A can configure a maximum of 12 cyclic shifts (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11) for the UE 110.

[0035] At 410, the gNB 120A configures the number of ports for Comb-8 SRS transmission. In some embodiments, the gNB 120A configures a maximum of 2 ports (1 or 2 ports) for the UE 110 for SRS Comb-8 transmission with 6 cyclic shifts (because 6 is divisible by 1 or 2). In some embodiments, the gNB 120A configures a maximum of 4 ports (1, 2, or 4 ports) for the UE 110 for SRS Comb-8 transmission with 8 or 12 cyclic shifts (because 8 and 12 are both divisible by 1, 2, or 4). In some embodiments, when the maximum number of configured cyclic shifts is 6, the gNB 120A can configure a maximum of 6 ports (in addition to 1 or 2 ports) for the UE for SRS transmission. In some embodiments, when the minimum SRS subband size is configured to 8 PRBs instead of the minimum 4 PRBs specified by the current 3GPP standard, the gNB 120A is able to configure a maximum of 4 ports (1, 2, or 4) for the UE 110 for SRS transmission.

[0036] At 415, the gNB 120A maps the configured cyclic shifts to the configured UE 110 ports. In some embodiments, the gNB 120A maps the cyclic shifts to the configured ports to ensure that the cyclic shifts are equally spaced when mapped to the ports. For example, when 6 cyclic shifts are configured (0, 1, 2, 3, 4, 5), and 2 ports are configured, the gNB 120A may map the first port to 0 and the second port to 3 to ensure equal distance between the mapped cyclic shifts. It should be noted that there are other mapping combinations that can also achieve this result (e.g., 1 and 4, 2 and 5, etc.). This equally spaced mapping also applies to embodiments where a maximum of 8 and 12 cyclic shifts are configured with a maximum of 4 ports.

[0037] When the comb-8SRS transmission is configured with a maximum of 6 cyclic shifts, the phase ramp value is determined by , where i is the corresponding cyclic shift (0, 1, 2, 3, 4, 5). In some embodiments, gNB 120A may alternatively explicitly configure the cyclic shift phase ramp for each SRS port. Thus, gNB 120A may multiplex more users using the same comb offset compared to the equally spaced mapping described above. In such an embodiment, gNB 120A may support a 6-port configuration when the cyclic shift phase ramp is explicitly indicated as described.

[0038] In some embodiments, when the comb-8 SRS transmission is configured with a maximum of 6 cyclic shifts, in order to support a 4-port configuration, the cyclic shift -n8 can be mapped to the corresponding port based on the following formula

[0039] in where α i is the phase slope of SRS port i, is the maximum number of cyclic shifts, is the configured cyclic shift (0, 1, 2, 3, 4, 5 of a maximum of 6 cyclic shifts), and p i is the port index of SRS port i. Therefore, the number of cyclic shifts does not have to be an integer multiple of the number of ports, thus allowing gNB 120A to freely indicate the mapping of cyclic shifts to each port. At 420, gNB 120A transmits the SRS configuration of 405-415 to UE 110. gNB 120A may include the SRS configuration in an RRC configuration message.

[0040] Figure 5 A method 500 for configuring resource block (RB) level fractional frequency sounding (RPFS) for SRS transmission according to various exemplary embodiments is shown. At 505, the gNB 120A configures the SRS subband size It may be based on Table 6.4.1.4.3-1 of 3GPP TS 38.211. At 510, gNB 120A configures the RPFS factor (P f ), so that the subband size is divided by the RPFS factor Generate RPFS for SRS transmission. In some embodiments, P f The determination of may be based on one or more constraints. In some embodiments, one or more constraints may be that the resulting RPFS value must be an integer. In some embodiments, one or more constraints may additionally or alternatively be that the resulting RPFS value must be an integer multiple of 4. In some embodiments, one or more constraints may additionally or alternatively be that the resulting RPFS value must be a subband size listed in Table 6.4.1.4.3-1 of 3GPP TS 38.211. For example, if the configured subband size is is 224 and P f =2, then RPFS will be 112, which is one of the subband sizes listed in Table 6.4.1.4.3-1 of 3GPP TS 38.211. In some embodiments, one or more constraints may additionally or alternatively be that the resulting RPFS value must result in an SRS sequence length supported by 3GPP Release 16 (e.g., sequence lengths of 6, 12, 18, 24 ≥ 36). The sequence length may be based on

[0041] To confirm,

[0042] Where K TCis the comb size, and 12 is the number of resource elements (REs) in a PRB. f is 2 and the comb size (K TC ) is 4, RPFS is 112, resulting in a sequence length of 168, which is greater than 36 and satisfies the constraint.

[0043] In some implementations, RPFS with non-integer values ​​may be allowed. In such an embodiment, the RPFS may be rounded (upper, lower, or nearest) to the subband size listed in Table 6.4.1.4.3-1 of 3GPP TS 38.211. One of. For example, if the RPFS value is 86.5, floor rounding of the value will produce a subband size of 80, ceiling rounding will produce a subband size of 88, and nearest rounding will produce a subband size of 88. In some embodiments, non-integer RPFS values ​​may alternatively be rounded (floor rounding, ceiling rounding, or nearest rounding) to the nearest integer that is a multiple of 4. In the example of the RPFS value of 86.5 above, floor rounding of the value will produce a subband size of 84, ceiling rounding will produce a subband size of 88, and nearest rounding will produce a subband size of 88. In some embodiments, non-integer RPFS values ​​may alternatively be rounded (floor rounding, ceiling rounding, or nearest rounding) to the nearest value that will produce an SRS sequence length supported by 3GPP Release 16 (e.g., sequence lengths of 6, 12, 18, 24 ≥ 36). In the above RPFS value of 86.5 and comb size (K TC ) is 4, lower bound rounding will produce a subband size of 86, upper bound rounding will produce a subband size of 87, and nearest rounding will produce a subband size of 87.

[0044] At 515, gNB 120A determines the SRS sequence length based on the RPFS value. If the value is not supported by 3GPP Release 16, the SRS sequence length (e.g., sequence length is 6, 12, 18, 24 ≥ 36), then in some embodiments, the RPFS value (P F) is not allowed. In some embodiments, the resulting RPFS can be alternatively rounded (rounded to the lower limit, rounded to the upper limit, or rounded to the nearest) to the closest SRS sequence length supported by 3GPP Release 16 (e.g., sequence lengths of 6, 12, 18, 24 ≥ 36). For example, if the RPFS value result is an SRS sequence length of 14.7, then the lower limit of the sequence length is rounded to 12, the upper limit is rounded to 18, and the nearest rounding is 12. In some embodiments, the currently supported SRS sequence length can be truncated alternatively. In such an embodiment, the sequence length generated by the RPFS is rounded (rounded to the lower limit, rounded to the upper limit, or rounded to the nearest) to an integer sequence length. Subsequently, a base sequence is selected from the currently supported SRS sequence lengths (6, 12, 18, 24 ≥ 36). In some embodiments, a base sequence that is the same or longer than the sequence length generated by the RPFS is selected. In some embodiments, in addition to the fact that the base sequence length must be greater than or equal to 36, a base sequence that is the same or longer than the sequence length generated by the RPFS is selected. Finally, the selected base sequence length is truncated. At 520, gNB 120A transmits the RPFS configuration to UE 110.

[0045] Those skilled in the art will appreciate that the exemplary embodiments described above may be implemented with any suitable software configuration or hardware configuration or combination thereof. Exemplary hardware platforms for implementing the exemplary embodiments may include, for example, Intel x86-based platforms with compatible operating systems, Windows OS, Mac platforms and MAC OS, mobile devices with operating systems such as iOS, Android, etc. The exemplary embodiments of the above methods may be embodied as a program comprising lines of code stored on a non-transitory computer-readable storage medium, which, when compiled, may be executed on a processor or microprocessor.

[0046] Although this patent application describes various combinations of various embodiments each having different features, those skilled in the art will understand that any feature of an embodiment may be combined with features of other embodiments in any manner not publicly denied or with features that are not functionally or logically inconsistent with the operation or function of the device of the embodiments disclosed in the present invention.

[0047] It is understood that the use of personally identifiable information should be subject to privacy policies and practices that are generally recognized to meet or exceed industry or government requirements for maintaining user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of the authorized use should be clearly stated to users.

[0048] It will be apparent to those skilled in the art that various modifications may be made to the present disclosure without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to cover modifications and variations of the present disclosure, provided that these modifications and variations are within the scope of the appended claims and their equivalents.

Claims

1. A processor of a base station, the processor being configured to perform operations, the operations comprising: Determine a resource block RB level partial frequency detection RPFS configuration, wherein the RB level RPFS configuration includes: The configured subband size; The RPFS factor to be applied to the configured subband size; a reduced subband size based on the configured subband size and the RPFS factor; and a resulting sounding reference signal (SRS) sequence length based on the configured subband size and the RPFS factor; and transmitting the RPFS configuration to a user equipment UE, Wherein, when the obtained SRS sequence length is not 6, 12, 18, 24, or greater than or equal to 36, the operation further includes: rounding the obtained SRS sequence length to an integer sequence length, wherein the rounding is one of upper rounding, lower rounding, or nearest rounding, Select a base sequence length from among SRS sequence lengths 6, 12, 18, 24, or greater than or equal to 36, Truncate to the selected base sequence length.

2. The processor according to claim 1, wherein: The RPFS factor satisfies at least one predetermined criterion, wherein the predetermined criterion includes: (i) the reduced subband size is an integer, (ii) the reduced subband size is an integer multiple of 4, (iii) the reduced subband size is a subband size supported by the 16th release of the 3GPP standard, and (iv) the resulting SRS sequence length is 6, 12, 18, 24 or greater than or equal to 36.

3. The processor according to claim 1, wherein: When the reduced subband size has a non-integer value, the operations further include: The non-integer value is rounded to a subband size supported by Release 16 of the 3GPP standard, wherein the rounding is one of rounding to a ceiling, rounding to a floor, or rounding to nearest.

4. The processor according to claim 1, wherein: When the reduced subband size has a non-integer value, the operations further include: The non-integer value is rounded to an integer multiple of 4, wherein the rounding is one of rounding ceiling, rounding floor, or rounding to nearest.

5. The processor according to claim 1, wherein: When the reduced subband size has a non-integer value, the operations further include: The non-integer value is rounded to a value for which the resulting SRS sequence length is 6, 12, 18, 24, or greater than or equal to 36.

6. The processor of claim 1, wherein: When the obtained SRS sequence length is not 6, 12, 18, 24, or is greater than or equal to 36, the RPFS factor is not allowed.

7. The processor according to claim 1, wherein: When the obtained SRS sequence length is not 6, 12, 18, 24, or is greater than or equal to 36, the operation further includes: The obtained SRS sequence length is rounded to an SRS sequence length of one of 6, 12, 18, 24, or greater than or equal to 36, wherein the rounding is one of upper limit rounding, lower limit rounding, or nearest rounding.

8. The processor of claim 1, wherein: The selected basic sequence length has a length greater than or equal to the obtained SRS sequence length.

9. The processor of claim 1, wherein: The selected basic sequence length has a length greater than or equal to the obtained SRS sequence length, and the selected basic sequence length is greater than or equal to 36.

10. A base station, comprising: a transceiver configured to communicate with a user equipment UE; as well as a processor communicatively coupled to the transceiver and configured to perform operations including: Determine a resource block RB level partial frequency detection RPFS configuration, wherein the RB level RPFS configuration includes: The configured subband size; The RPFS factor to be applied to the configured subband size; a reduced subband size based on the configured subband size and the RPFS factor; and a resulting sounding reference signal (SRS) sequence length based on the configured subband size and the RPFS factor; and transmitting the RPFS configuration to the UE, Wherein, when the obtained SRS sequence length is not 6, 12, 18, 24, or greater than or equal to 36, the operation further includes: rounding the obtained SRS sequence length to an integer sequence length, wherein the rounding is one of upper rounding, lower rounding, or nearest rounding, Select a base sequence length from among SRS sequence lengths 6, 12, 18, 24, or greater than or equal to 36, Truncate to the selected base sequence length.

11. The base station according to claim 10, wherein: The RPFS factor satisfies at least one predetermined criterion, wherein the predetermined criterion includes: (i) the reduced subband size is an integer, (ii) the reduced subband size is an integer multiple of 4, (iii) the reduced subband size is a subband size supported by the 16th release of the 3GPP standard, and (iv) the resulting SRS sequence length is 6, 12, 18, 24 or greater than or equal to 36.

12. The base station according to claim 10, wherein: When the reduced subband size has a non-integer value, the operations further include: The non-integer value is rounded to a subband size supported by Release 16 of the 3GPP standard, wherein the rounding is one of rounding to a ceiling, rounding to a floor, or rounding to nearest.

13. The base station according to claim 10, wherein: When the reduced subband size has a non-integer value, the operations further include: The non-integer value is rounded to an integer multiple of 4, wherein the rounding is one of rounding ceiling, rounding floor, or rounding to nearest.

14. The base station according to claim 10, wherein: When the reduced subband size has a non-integer value, the operations further include: The non-integer value is rounded to a value for which the resulting SRS sequence length is 6, 12, 18, 24, or greater than or equal to 36.

15. The base station according to claim 10, wherein: When the obtained SRS sequence length is not 6, 12, 18, 24, or is greater than or equal to 36, the RPFS factor is not allowed.

16. The base station according to claim 10, wherein: When the obtained SRS sequence length is not 6, 12, 18, 24, or is greater than or equal to 36, the operation further includes: The obtained SRS sequence length is rounded to an SRS sequence length of one of 6, 12, 18, 24, or greater than or equal to 36, wherein the rounding is one of upper limit rounding, lower limit rounding, or nearest rounding.

17. The base station according to claim 10, wherein: The selected basic sequence length has a length greater than or equal to the obtained SRS sequence length.

18. The base station according to claim 10, wherein: The selected basic sequence length has a length greater than or equal to the obtained SRS sequence length, and the selected basic sequence length is greater than or equal to 36.

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