Sounding reference signal (SRS) enhancements for multiple transmit and receive point (TRP) operations

Abstract

Some aspects of the present disclosure relate to apparatuses and methods for implementing a mechanism for reducing interference to a sounding reference signal (SRS) by one or more of, for example, frequency domain interference randomization, code domain interference randomization, or power control. For example, a user equipment (UE) may be configured to determine a comb offset and / or a cyclic shift for each sounding reference signal (SRS) transmission occasion for the UE. The comb offset and / or the cyclic shift vary between different SRS transmission opportunities of the UE. The UE is further configured to transmit the SRS to the base station using the determined comb offset and / or the determined cyclic shift during the corresponding SRS transmission occasion.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. non-provisional patent application No. 18 / 199,453 filed on May 19, 2023, which claims the benefit of U.S. provisional patent application No. 63 / 395,577 filed on August 5, 2022, both of which are incorporated herein by reference in their entirety. Background Art Technical Field

[0003]

[0013] The described aspects generally relate to mechanisms for a network to reduce interference to a sounding reference signal (SRS).

[0004] Related fields

[0005] The user equipment (UE) sends a sounding reference signal (SRS) to the base station to help the base station determine the channel quality of the uplink channel from the UE to the base station. SRS is a reference signal sent using SRS resources. SRS resources may include the location of the SRS in the time domain and frequency domain in the resource grid. In some specific implementations, the parameters for SRS resources and / or SRS transmission may be determined by the base station and may be communicated to the UE. If multiple UEs are communicating with one or more base stations (or one or more transmit and receive points (TRPs)), the SRS transmission from the UE may interfere, and the base station may not be able to determine the channel quality based on the SRS transmission. Summary of the invention

[0006] Some aspects of the present disclosure relate to apparatus and methods for implementing mechanisms for reducing interference to a sounding reference signal (SRS) through, for example, one or more of frequency domain interference randomization, code domain interference randomization, or power control.

[0007] Some aspects of the present disclosure relate to a user equipment (UE). The UE includes: a transceiver configured to enable wireless communication with a base station; and a processor communicatively coupled to the transceiver. The processor is configured to determine a comb offset for each of a plurality of sounding reference signal (SRS) transmission opportunities for the UE. The comb offset changes between each of the plurality of SRS transmission opportunities. The processor is further configured to generate a first SRS for the first transmission opportunity using the determined comb offset corresponding to the first SRS transmission opportunity in the plurality of SRS transmission opportunities. The processor is further configured to use the transceiver to send the first SRS to the base station.

[0008] In some aspects, the comb offset is determined based on a comb size configuration configured by radio resource control (RRC), a comb offset configured by RRC, and an offset applied to the comb offset configured by RRC. For example, the comb offset for each SRS transmission opportunity is determined as CombOffset(k)=mod(CombOffset+F(mod(k,COMB)),COMB), where k is a non-negative integer indicating the SRS transmission opportunity, COMB is a comb size configuration configured by radio resource control (RRC), mod is a modulus operation, CombOffset is a comb offset configured by RRC, F is an offset applied to the comb offset configured by RRC, and CombOffset(k) is the comb offset for the SRS transmission opportunity k.

[0009] In some aspects, the offset of the comb offset applied to the RRC configuration comprises one or more sequences in a sequence including {0,1} for the comb size configuration of the RRC configuration for a Comb 2 configuration, {0,3,2,1}, {0,1,2,3}, or {0,2,1,3} for the comb size configuration of the RRC configuration for a Comb 4 configuration, and {0,1,2,3,4,5,6,7}, {0,3,6,1,4,7,2,5}, {0,5,2,7,4,1,6,3}, {0,7,6,5,4,3,2,1}, or {0,4,2,6,1,5,3,7} for the comb size configuration of the RRC configuration for a Comb 8 configuration.

[0010] In some aspects, the processor is configured to determine the comb offset for each SRS transmission opportunity several times within a time slot. In some aspects, the number of times is determined by dividing the number of symbols used for SRS transmission by a repetition factor. In some aspects, the UE is configured to determine the number of symbols and the repetition factor used for the SRS transmission based on an RRC message from the base station.

[0011] In some aspects, the processor is configured to determine the comb offset for each SRS transmission opportunity once in a time slot. In some aspects, the processor is configured to determine the comb offset for each SRS transmission opportunity when the multiple SRS transmission opportunities share the same frequency position. In some aspects, the processor is configured to determine the comb offset for each SRS transmission opportunity when the multiple SRS transmission opportunities have different frequency positions.

[0012] Some aspects of the present disclosure relate to a method, comprising: determining, by a user equipment (UE), a comb offset for each of a plurality of sounding reference signal (SRS) transmission opportunities for the UE. The comb offset changes between each of the plurality of SRS transmission opportunities. The method further comprises: generating, by the UE, a first SRS for a first SRS transmission opportunity among the plurality of SRS transmission opportunities using the determined comb offset corresponding to the first SRS transmission opportunity. The method further comprises: transmitting, by the UE, the first SRS to a base station.

[0013] Some aspects of the present disclosure relate to a non-transitory computer-readable medium that stores instructions. When the instruction is executed by a processor of a user equipment (UE), the instruction causes the processor to perform an operation, the operation comprising: determining a comb offset for each of a plurality of sounding reference signal (SRS) transmission opportunities for the UE. The comb offset changes between each of the plurality of SRS transmission opportunities. The operation also includes: using the determined comb offset corresponding to the first SRS transmission opportunity in the plurality of SRS transmission opportunities to generate a first SRS for the first transmission opportunity. The operation also includes: sending the first SRS to a base station. The comb offset can be determined based on a comb size configuration configured by a radio resource control (RRC) configuration, a comb offset configured by the RRC configuration, and an offset applied to the comb offset configured by the RRC configuration.

[0014] Some aspects of the present disclosure relate to a user equipment (UE). The UE includes: a transceiver configured to enable wireless communication with a base station; and a processor communicatively coupled to the transceiver. The processor is configured to determine a cyclic shift for each of a plurality of sounding reference signal (SRS) transmission opportunities for the UE. The cyclic shift changes between each of the plurality of SRS transmission opportunities. The processor is further configured to generate a first SRS for the first transmission opportunity using the determined cyclic shift corresponding to the first SRS transmission opportunity in the plurality of SRS transmission opportunities. The processor is further configured to send the first SRS to the base station using the transceiver.

[0015] In some aspects, the cyclic shift is determined based on a radio resource control (RRC) configured comb size configuration, an RRC configured cyclic shift, and an offset applied to the RRC configured cyclic shift. For example, the cyclic shift for each SRS transmission opportunity is determined as Where k is a non-negative integer indicating the SRS transmission timing, is the maximum number of cyclic shifts derived from the comb size configuration configured by radio resource control (RRC), mod is the modulo operation, CyclicShift is the cyclic shift configured by RRC, F is the offset applied to the cyclic shift configured by RRC, and CyclicShift(k) is the cyclic shift for the SRS transmission opportunity k.

[0016] In some aspects, the offsets applied to the cyclic shifts of the RRC configuration include one or more of a sequence including: {0,1,2,3,4,5}, {0,2,4,1,3,5}, {0,3,1,4,2,5}, or {0,5,4,3,2,1} for a maximum number of cyclic shifts of 6; {0,1,2,3,4,5,6,7}, {0,4,2,6,1,5,3,7}, {0,3,6,1,4,7,2,5}, {0,5,2,7,4,1,6,3}, {0,7,6,5, or {0,4,3,2,1} or {0,4,2,6,1,5,3,7}; and for the maximum number of cyclic shifts being 12, {0,1,2,3,4,5,6,7,8,9,10,11}, {0,6,3,9,2,8,4,10,1,7,5,11}, {0,3,6,9,1,4,7,10,2,5,8,11}, {0,5,10,3,8,1,6,11,4,9,2,7}, {0,7,2,9,4,11,6,1,8,3,10,5} or {0,11,10,9,8,7,6,5,4,3,2,1}.

[0017] In some aspects, the processor is configured to determine the cyclic shift for each SRS transmission opportunity several times within a time slot. In some aspects, the number of times is determined by dividing the number of symbols used for SRS transmission by a repetition factor. In some aspects, the UE is configured to determine the number of symbols and the repetition factor used for the SRS transmission based on an RRC message from the base station.

[0018] In some aspects, the processor is configured to determine the cyclic shift for each SRS transmission opportunity once in a time slot. In some aspects, the processor is configured to determine the cyclic shift for each SRS transmission opportunity when the multiple SRS transmission opportunities share the same frequency position. In some aspects, the processor is configured to determine the cyclic shift for each SRS transmission opportunity when the multiple SRS transmission opportunities have different frequency positions.

[0019] In some aspects, the processor is further configured to determine an SRS base sequence based on a message from the base station; and generate the SRS using the determined SRS base sequence.

[0020] Some aspects of the present disclosure relate to a method, comprising: determining, by a user equipment (UE), a cyclic shift for each of a plurality of sounding reference signal (SRS) transmission opportunities for the UE. The cyclic shift changes between each of the plurality of SRS transmission opportunities. The method also includes: generating, by the UE, a first SRS for a first SRS transmission opportunity among the plurality of SRS transmission opportunities using the determined cyclic shift corresponding to the first SRS transmission opportunity. The method also includes: transmitting, by the UE, the first SRS to a base station.

[0021] Some aspects of the present disclosure relate to a non-transitory computer-readable medium that stores instructions. When the instruction is executed by a processor of a user equipment (UE), the instruction causes the processor to perform an operation, the operation comprising: determining a cyclic shift for each of a plurality of sounding reference signal (SRS) transmission opportunities for the UE. The cyclic shift changes between each of the plurality of SRS transmission opportunities. The operation also includes: using the determined cyclic shift corresponding to the first SRS transmission opportunity in the plurality of SRS transmission opportunities to generate a first SRS for the first transmission opportunity. The operation also includes: sending the first SRS to a base station. The cyclic shift may be determined based on a comb size configuration configured by a radio resource control (RRC), a cyclic shift configured by the RRC, and an offset applied to the cyclic shift configured by the RRC.

[0022] Some aspects of the present disclosure relate to a base station. The base station includes: a transceiver configured to enable wireless communication with a user equipment (UE); and a processor communicatively coupled to the transceiver. The processor is configured to control a first transmit receive point (TRP) and a second TRP associated with the base station. The processor is further configured to configure one or more sounding reference signal (SRS) power control parameters. The processor is further configured to use the transceiver to send the configured one or more SRS power control parameters to the UE for the UE to send SRS to the first TRP and / or the second TRP. The one or more SRS power control parameters are configured according to SRS resources in an SRS resource set including one or more SRS resources. Additionally or alternatively, the one or more SRS power control parameters include additional parameters for the second TRP in the SRS resource set compared to the parameters for the first TRP.

[0023] In some aspects, the one or more SRS power control parameters include one or more of an open loop power control (OPLC) path loss compensation factor (α), an OLPC expected received power (p0) at the transceiver of the base station, or an OLPC path loss estimation reference signal (pathlossReferenceRS).

[0024] In some aspects, the one or more SRS power control parameters include a first parameter set for the first TRP and a second parameter set for the second TRP. In some aspects, the first parameter set for the first TRP enables the UE to determine a first SRS transmit power for the first TRP, and the second parameter set for the second TRP enables the UE to determine a second SRS transmit power for the second TRP.

[0025] In some aspects, the actual SRS transmit power may be determined by the UE as the highest SRS transmit power between the first SRS transmit power and the second SRS transmit power. In some aspects, the actual SRS transmit power may be determined by the UE as the average SRS transmit power between the first SRS transmit power and the second SRS transmit power.

[0026] In some aspects, the additional parameters for the second TRP include one or more of an open-loop power control (OPLC) path loss compensation factor (α), an OLPC expected received power (p0) at the transceiver of the base station, or an OLPC path loss estimation reference signal (pathlossReferenceRS).

[0027] Some aspects of the present disclosure relate to a method, comprising: controlling, by a base station, a first transmit receive point (TRP) and a second TRP associated with the base station. The method also comprises: configuring, by the base station, one or more sounding reference signal (SRS) power control parameters; and sending, by the base station, the configured one or more SRS power control parameters to a user equipment (UE) for sending SRS to the first TRP and / or the second TRP. The one or more SRS power control parameters are configured according to SRS resources in an SRS resource set including one or more SRS resources. Additionally or alternatively, the one or more SRS power control parameters include additional parameters for the second TRP in the SRS resource set compared to the parameters for the first TRP.

[0028] Some aspects of the present disclosure relate to a non-transitory computer-readable medium that stores instructions. When the instruction is executed by a processor of a base station, the instruction causes the processor to perform an operation, the operation comprising: controlling, by the base station, a first transmit receive point (TRP) and a second TRP associated with the base station. The operation also includes: configuring, by the base station, one or more sounding reference signal (SRS) power control parameters; and sending, by the base station, the configured one or more SRS power control parameters to a user equipment (UE) for sending SRS to the first TRP and / or the second TRP. The one or more SRS power control parameters are configured according to SRS resources in an SRS resource set including one or more SRS resources. Additionally or alternatively, the one or more SRS power control parameters include additional parameters for the second TRP in the SRS resource set compared to the parameters for the first TRP.

[0029] Some aspects of the present disclosure relate to a user equipment (UE) comprising: a transceiver configured to enable wireless communication with a base station that controls a first transmit receive point (TRP) and a second TRP associated with the base station; and a processor communicatively coupled to the transceiver. The processor is configured to receive one or more sounding reference signal (SRS) power control parameters configured by the base station; and determine an actual SRS transmit power for transmitting SRS to the first TRP and / or the second TRP based on the received one or more SRS power control parameters. The one or more SRS power control parameters are configured according to SRS resources in an SRS resource set including one or more SRS resources. Additionally or alternatively, the one or more SRS power control parameters include additional parameters for the second TRP in the SRS resource set compared to the parameters for the first TRP.

[0030] Some aspects of the present disclosure relate to a method comprising: receiving, by a user equipment (UE), one or more sounding reference signal (SRS) power control parameters configured by a base station. The base station controls a first transmit receive point (TRP) and a second TRP associated with the base station. The method also includes: determining an actual SRS transmit power for sending SRS to the first TRP and / or the second TRP based on the received one or more SRS power control parameters. The one or more SRS power control parameters are configured according to SRS resources in an SRS resource set including one or more SRS resources. Additionally or alternatively, the one or more SRS power control parameters include additional parameters for the second TRP in the SRS resource set compared to the parameters for the first TRP.

[0031] Some aspects of the present disclosure relate to a non-transitory computer-readable medium that stores instructions. When the instruction is executed by a processor of a user equipment (UE), the instruction causes the processor to perform an operation, the operation comprising: receiving one or more sounding reference signal (SRS) power control parameters configured by a base station. The base station controls a first transmit receive point (TRP) and a second TRP associated with the base station. The method also includes: determining an actual SRS transmit power for transmitting an SRS based on the one or more received SRS power control parameters. The one or more SRS power control parameters are configured according to SRS resources in an SRS resource set including one or more SRS resources. Additionally or alternatively, the one or more SRS power control parameters include additional parameters for the second TRP in the SRS resource set compared to the parameters for the first TRP.

[0032] The present invention is provided for the purpose of illustrating some aspects only, so as to provide an understanding of the subject matter described herein. Therefore, the above-mentioned features are only examples and should not be understood as narrowing the scope or essence of the subject matter in the present disclosure. Other features, aspects and advantages of the present disclosure will become apparent from the following detailed description, drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and enable those skilled in the relevant art to make and use the present disclosure.

[0034] Figure 1 An example system implementing mechanisms for a network to implement mechanisms for reducing interference to a sounding reference signal (SRS) in accordance with some aspects of the present disclosure is illustrated.

[0035] Figure 2 A block diagram illustrating an example system of an electronic device implementing mechanisms for reducing interference to SRS according to some aspects of the present disclosure.

[0036] Figure 3 Exemplary comb offset hopping for SRS interference randomization according to some aspects of the present disclosure is illustrated.

[0037] Figure 4A Exemplary intra-slot comb offset hopping according to some aspects of the present disclosure is illustrated.

[0038] Figure 4B Exemplary inter-slot comb offset hopping according to some aspects of the present disclosure is illustrated.

[0039] Figure 5An example method of a system (eg, a UE) for supporting a mechanism for comb offset hopping for SRS interference randomization in accordance with some aspects of the present disclosure is illustrated.

[0040] Figure 6 Example cyclic shift hopping for SRS interference randomization according to some aspects of the present disclosure is illustrated.

[0041] Fig. 7A Exemplary intra-slot cyclic shift hopping according to some aspects of the present disclosure is illustrated.

[0042] Figure 7B Exemplary inter-slot cyclic shift hopping according to some aspects of the present disclosure is illustrated.

[0043] Figure 8

[0013] An example method of a system (eg, a UE) for supporting a mechanism for cyclic shift hopping for SRS interference randomization in accordance with some aspects of the present disclosure is illustrated.

[0044] Fig.9A An example method of a system (eg, a base station) for supporting a mechanism for SRS power control for SRS interference randomization in accordance with some aspects of the present disclosure is illustrated.

[0045] Fig. 9B

[0013] An example method of a system (eg, UE) for supporting a mechanism for SRS power control for SRS interference randomization in accordance with some aspects of the present disclosure is illustrated.

[0046] Fig.10 is an example computer system that can be used to implement some aspects or portions thereof.

[0047] The present disclosure is described with reference to the accompanying drawings. In the drawings, generally, like reference numerals indicate identical or functionally similar elements. Additionally, generally, the leftmost digit of a reference numeral identifies the drawing in which the reference numeral first appears. DETAILED DESCRIPTION

[0048] Some aspects of the present disclosure relate to apparatus and methods for implementing mechanisms for reducing interference to a sounding reference signal (SRS) through, for example, one or more of frequency domain interference randomization, code domain interference randomization, or power control.

[0049] In some examples, aspects of the present disclosure may be performed by a network and / or UE operating in accordance with New Radio (NR) of the fifth generation (5G) wireless technology for digital cellular networks defined by the Third Generation Partnership Project (3GPP). Additionally or alternatively, aspects of the present disclosure may be performed by a network and / or UE operating in accordance with Release 18 (Rel-18), Release 17 (Rel-17), Release 16 (Rel-16), and Release 15 (Rel-15), etc. However, aspects of the present disclosure are not limited to these examples, and one or more mechanisms of the present disclosure may be implemented by other networks and / or UEs to reduce interference to SRS using one or more of frequency domain interference randomization, code domain interference randomization, or power control.

[0050] Figure 1 An example system 100 is illustrated that implements a mechanism for reducing interference to a sounding reference signal (SRS) in accordance with some aspects of the present disclosure. The example system 100 is provided for purposes of illustration only and not to limit the disclosed aspects.

[0051] The system 100 may include, but is not limited to, one or more transmission and reception points (TRPs) 101a and 101b, electronic devices (e.g., UEs) 105a and 105b, and base stations 107 (e.g., base stations such as eNBs, gNBs, etc.). The electronic devices 105a and 105b (hereinafter referred to as UEs 105) may include electronic devices configured to operate based on various wireless communication technologies. These technologies may include, but are not limited to, technologies based on the third generation partnership project (3GPP) standards. For example, the UE 105 may include an electronic device configured to operate using NR, Rel-18, Rel-17, and / or other versions of the 3GPP standards. The UE 105 may include, but is not limited to, wireless communication devices, smart phones, laptops, desktop computers, tablets, personal assistants, monitors, televisions, wearable devices, Internet of Things (IoT), transportation communication devices, etc.

[0052] TRPs 101a and 101b (hereinafter referred to as TRP 101) and base stations 107 (hereinafter referred to as base stations or cells) may include nodes configured to operate based on various wireless communication technologies (such as, but not limited to, technologies based on 3GPP standards). For example, base station 101 may include a node configured to operate using NR, Rel-18, Rel-17, and / or other versions of the 3GPP standard. In some aspects, TRPs 101a and / or 101b may be coupled to base station 107 and / or controlled by the base station. Additionally or alternatively, TRPs 101a and / or 101b may be part of base station 107. For example, TRP 101 may include an antenna array (e.g., having one or more antenna elements) that is available to base station 107 and located at a specific geographic location. In some specific implementations, each TRP 101 may be part of its corresponding base station (and / or coupled to and controlled by the corresponding base station). However, aspects of the present disclosure are not limited to these examples, and TRP 101 and base station 107 may have other connections and / or relationships.

[0053] According to some aspects, UE 105 may use TRP 101 to connect to base station 107 and may communicate with the base station. For example, UE 105a may use carrier 102a to communicate with base station 107 and / or TRP 101a. UE 105a may use carrier 102b to communicate with base station 107 and / or TRP 101b. Similarly, UE 105b may use carrier 103a to communicate with base station 107 and / or TRP 101a. Moreover, UE 105b may use carrier 103b to communicate with base station 107 and / or TRP 101b. According to some aspects, carrier 102 (collectively referred to herein as carrier 102 refers to carriers 102a and 102b) and / or carrier 103 (collectively referred to herein as carrier 103 refers to carriers 103a and 103b) may include one carrier. Additionally or alternatively, carrier 102 and / or 103 may include two or more component carriers (CCs). In other words, UE 105 may implement carrier aggregation (CA). For example, UE may communicate with base station 101 using multiple carriers.

[0054] According to some aspects, UE 105 may be configured to send SRS to TRP 101 and / or base station 107. For example, SRS may help base station 107 determine the channel quality of an uplink channel from UE 105 to base station 107. For example, SRS may be used for uplink channel sounding, which may include, but is not limited to, channel estimation and synchronization. SRS may be an uplink orthogonal frequency division multiplexing (OFDM) signal populated with Zadoff-Chu sequences on different subcarriers. According to some implementations, SRS is known to both UE 105 and base station 107.

[0055] UE 105 may transmit SRS during one or more SRS transmission opportunities (e.g., SRS resources). SRS transmission opportunities (e.g., SRS resources) may include the location of the SRS in the time domain and the frequency domain in the resource grid. In some specific implementations, the SRS transmission opportunity may include one or more resource elements. In some specific implementations, the parameters for SRS transmission opportunity and / or SRS transmission may be determined by base station 107 and may be communicated to UE 105.

[0056] In some examples (e.g., in Rel-15), SRS may be sent only in the last 6 symbols of each slot, SRS may be repeated up to 4 symbols, and SRS may only support comb 1 / 2 / 4 configurations. In some implementations, comb 1 configuration includes a configuration in which no SRS is multiplexed. Comb 2 configuration may include a configuration in which 2 SRS are multiplexed. Also, comb 4 configuration includes a configuration in which 4 SRS are multiplexed.

[0057] In some examples (eg, in Rel-16), SRS may be sent in any symbol in a slot, SRS may support repetitions with 8 and 12 symbols, and SRS may support a comb 8 configuration (in addition to a comb 1 / 2 / 4 configuration).

[0058] In some examples (e.g., in Rel-17), flexible aperiodic (AP) SRS triggering may be supported. In addition, resource block (RB) level fractional frequency sounding (RPFS) may be supported. Additionally, SRS repetitions with 10 and 14 symbols and comb 8 configurations with 4 ports may be supported. In some implementations in Rel-17, channel state information (CSI) feedback is further enhanced for NCJT (non-coherent joint transmission) of multiple TRPs. According to some implementations, the enhancement may be based on a type IMIMO codebook, and the codebook may only support single DCI multi-TRP NCJT scheme 1a (e.g., SDM (spatial domain multiplexing)).

[0059] As discussed in more detail below, Figure 1 The system 100 is configured to implement a mechanism for reducing interference to SRS, for example, by one or more of frequency domain interference randomization, code domain interference randomization, or power control. In some implementations, the SRS mechanism of the system 100 can be applied to multi-TRP CJT operation.

[0060] In some implementations, UE 105, base station 107, and / or TRP 101 are configured to determine (e.g., configure) one or more parameters for SRS transmission timing (e.g., SRS resources) to achieve one or more of frequency domain interference randomization, code domain interference randomization, or power control. In some implementations, the SRS mechanism of system 100 may be applied to multi-TRPCJT operations. Although some aspects of the present disclosure are discussed with respect to base station 107, similar operations may be performed by base station 107 and / or TRP 101.

[0061] In some implementations, the UE 105 and / or the base station 107 are configured to determine (e.g., configure) one or more parameters for SRS transmission timing (e.g., SRS resources) to achieve frequency domain interference randomization. For example, the UE 105 and / or the base station 107 may be configured to determine (e.g., configure) a comb offset for each SRS transmission timing for comb offset hopping for SRS interference randomization. Additionally or alternatively, the comb offset hopping may be considered for intra-slot comb offset hopping or inter-slot comb offset hopping. In addition, the base station 107 is configured to determine the SRS transmission timing for comb offset hopping.

[0062] In some implementations, the UE 105 and / or the base station 107 are configured to determine (e.g., configure) one or more parameters for SRS transmission timing (e.g., SRS resources) to achieve code domain interference randomization. For example, the UE 105 and / or the base station 107 may be configured to determine (e.g., configure) at least one of the SRS base sequence or cyclic shift (CS) for each SRS transmission timing. In some implementations, the UE 105 and / or the base station 107 may be configured to determine (e.g., configure) the CS for CS hopping for SRS interference randomization. Additionally or alternatively, CS hopping may be considered for intra-slot comb offset hopping or inter-slot comb offset hopping. In addition, the base station 107 is configured to determine the SRS transmission timing for CS hopping.

[0063] In some implementations, the UE 105 and / or the base station 107 are configured to determine (e.g., configure) one or more parameters for SRS transmission opportunities (e.g., SRS resources) to achieve power control enhancement. For example, the UE 105 and / or the base station 107 may be configured to determine (e.g., configure) one or more SRS power control parameters for each SRS transmission opportunity. In some implementations, the SRS power control parameters are configured according to the SRS resources in the SRS resource set, wherein the SRS resource set includes one or more SRS resources. Additionally or alternatively, the SRS power control parameters may include additional parameters for a second TRP (e.g., TRP 103b) in the SRS resource set. The additional parameters for the second TRP are parameters other than the parameters for the first TRP. Additionally or alternatively, the SRS power control parameters may include a first parameter set for a TRP (e.g., TRP 103a) and a second parameter set for a second TRP (e.g., TRP 103b).

[0064] The base station 107 may communicate one or more parameters of the SRS transmission timing for frequency domain interference randomization, code domain interference randomization, or power control to the UE 105. In a non-limiting example, the base station 107 may use a radio resource control (RRC) message to communicate one or more parameters for the SRS transmission timing. For example, the base station 107 may use an SRS resource message (also referred to as an SRS resource parameter) to communicate one or more parameters for the SRS transmission timing. The UE 105 may use one or more parameters for the SRS transmission timing, which the UE receives from the base station 107 and / or which the UE determines to be used for sending the SRS to the base station 107.

[0065] According to some aspects, the system 100 may perform frequency domain interference randomization, code domain interference randomization, or power control, respectively. Additionally or alternatively, the system 100 may perform any combination of frequency domain interference randomization, code domain interference randomization, and power control. In some examples, the system may be configured to perform frequency domain interference randomization and code domain interference randomization. In some examples, the system may be configured to perform frequency domain interference randomization and power control. In some examples, the system may be configured to perform code domain interference randomization and power control. In some examples, the system may be configured to perform frequency domain interference randomization and code domain interference randomization and power control. In some examples, the system 100 may perform one or more frequency domain interference randomization, code domain interference randomization, or power control and other mechanisms.

[0066] Figure 2A block diagram of an example system 200 of an electronic device implementing a mechanism for reducing interference to SRS according to some aspects of the present disclosure is illustrated. System 200 can be any electronic device in the electronic device of system 100 (e.g., TRP 101, UE 105, and / or base station 107). System 200 (e.g., a wireless system) includes at least a processor 210, one or more transceivers 220a-220n, a communication infrastructure 240, a memory 250, an operating system 252, an application 254, and an antenna 260. The illustrated system is provided as an exemplary portion of system 200, and system 200 may include other circuits and subsystems. In addition, although the system of system 200 is illustrated as a separate component, aspects of the present disclosure may include any combination of these components, fewer components, more components, and / or different components.

[0067] The memory 250 may include random access memory (RAM) and / or cache, and may include control logic components (e.g., computer software) and / or data. The memory 250 may include other storage devices or memories, such as, but not limited to, a hard drive and / or a removable storage device / unit. According to some examples, an operating system 252 may be stored in the memory 250. The operating system 252 may manage data transfer from the memory 250 and / or one or more applications 254 to the processor 210 and / or one or more transceivers 220a-220n. In some examples, the operating system 252 maintains one or more network protocol stacks (e.g., an Internet protocol stack, a cellular protocol stack, etc.) that may include multiple logical layers. At the corresponding layer of the protocol stack, the operating system 252 includes control mechanisms and data structures to perform functions associated with the layer.

[0068] According to some examples, applications 254 may be stored in memory 250. Applications 254 may include applications (e.g., user applications) used by system 200 and / or a user of system 200. Applications in applications 254 may include applications such as, but not limited to, audio streaming, video streaming, remote control, and / or other user applications.

[0069] The system 200 may also include a communication infrastructure 240. The communication infrastructure 240 provides, for example, communication between the processor 210, one or more transceivers 220a-220n, and the memory 250. In some implementations, the communication infrastructure 240 may be a bus. The processor 210, together with instructions stored in the memory 250, executes operations that enable the system 200 of the system 100 to implement the mechanism for reducing interference to the SRS as described herein. Additionally or alternatively, the one or more transceivers 220a-220n execute operations that enable the system 200 of the system 100 to implement the mechanism for reducing interference to the SRS as described herein.

[0070] One or more transceivers 220a-220n send and receive communication signals supporting mechanisms for reducing interference to SRS according to some aspects, and may be coupled to antenna 260. Antenna 260 may include one or more antennas that may be the same or different types. One or more transceivers 220a-220n allow system 200 to communicate with other devices that may be wired and / or wireless. In some examples, one or more transceivers 220a-220n may include processors, controllers, radio components, sockets, plugs, buffers, and similar circuits / devices for connecting to a network and communicating on the network. According to some examples, one or more transceivers 220a-220n may include one or more circuits for connecting to a wired network and / or a wireless network and communicating on a wired network and / or a wireless network.

[0071] According to some aspects, one or more transceivers 220a-220n may include a cellular subsystem, a WLAN subsystem, and / or a Bluetooth subsystem. TM Subsystems, each of which includes its own radio transceiver and protocol, as will be understood by those skilled in the art based on the discussion provided herein. In some implementations, one or more of the transceivers 220a-220n may include more or fewer systems for communicating with other devices.

[0072] In some examples, one or more transceivers 220a-220n may include one or more circuits (including a WLAN transceiver) for enabling connection and communication over a WLAN network (such as, but not limited to, a network based on the standards described in IEEE 802.11). Additionally or alternatively, one or more transceivers 220a-220n may include circuits (including a WLAN transceiver) for enabling connection and communication over a WLAN network (such as, but not limited to, a network based on the standards described in IEEE 802.11). TM Protocol, Bluetooth TM Low Energy Protocol or Bluetooth TM One or more circuits for connection and communication with low-power long-range protocols (including Bluetooth TM For example, the transceiver 220n may include a Bluetooth TM Transceiver.

[0073] Additionally, one or more transceivers 220a-220n may include one or more circuits (including cellular transceivers) for connecting to and communicating on a cellular network. Cellular networks may include, but are not limited to, 3G / 4G / 5G networks such as Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE), etc. For example, one or more transceivers 220a-220n may be configured to operate in accordance with one or more of Rel-15, Rel-16, Rel-17, Rel-18, NR, or other versions of the 3GPP standard.

[0074] According to some aspects, processor 210, alone or in combination with computer instructions stored within memory 250 and / or one or more transceivers 220a-220n, implements mechanisms for reducing interference to SRS as discussed herein.

[0075] As discussed above, in some implementations, a mechanism for reducing interference to the SRS may include frequency domain interference randomization. For example, a base station (e.g., base station 107) and / or a UE (e.g., UE 105) is configured to determine (e.g., configure) one or more parameters for SRS transmission timing (e.g., SRS resources) to achieve frequency domain interference randomization. For example, UE 105 and / or base station 107 may be configured to determine (e.g., configure) a comb offset for each SRS transmission timing for comb offset hopping for SRS interference randomization. Additionally or alternatively, comb offset hopping may be considered for intra-slot comb offset hopping or inter-slot comb offset hopping. In addition, base station 107 is configured to determine an SRS transmission timing for comb offset hopping.

[0076] In the current implementation, when the base station configures parameters for SRS transmission timing for each UE, the base station does not change these configuration parameters. Therefore, if there is a conflict between the SRS transmissions of two UEs, the conflict (e.g., a conflict between the SRSs of the UEs) will be persistent and will not resolve itself. As discussed in more detail below, some aspects of the present disclosure relate to apparatus and methods for changing parameters for SRS transmission timing for each UE so that any possible interference between the SRS transmissions of the UEs can be reduced and will not persist. Changing parameters for SRS transmission timing for each UE may include one or more of frequency domain interference randomization, code domain interference randomization, or power control.

[0077] Figure 3 Exemplary comb offset hopping for SRS interference randomization according to some aspects of the present disclosure is illustrated. Comb offset hopping for SRS interference randomization can be used for frequency domain interference randomization.

[0078] Figure 3 A plurality of resource elements 301 are illustrated. Resource element 301 may be the smallest physical resource and may include one subcarrier during one orthogonal frequency division multiplexing (OFDM) symbol. Resource element 301 may be identified by a first index in the frequency domain and a second index that refers to an OFDM symbol position relative to a reference point in the time domain. According to some aspects, a resource block (RB) may include 12 consecutive subcarriers in the frequency domain.

[0079] In some implementations, resource element 301 is within a time slot 303. Time slot 303 may include a number of symbols in the time domain. In some non-limiting examples, time slot 303 may include 14 symbols in the time domain. In some implementations, time slot 303 may include a number of subcarriers in the frequency domain. In some non-limiting examples, time slot 303 may include 12 subcarriers in physical resource block PRB0 305a and 12 subcarriers in PRB1 305b. However, aspects of the present disclosure are not limited to these examples, and other numbers of symbols and subcarriers may be used.

[0080] According to some aspects, a UE (e.g., UE 105) may be configured to transmit an SRS at one or more SRS transmission opportunities (e.g., SRS resources) 307 and 309. In some implementations, the SRS transmission opportunities 307 and 309 are configured by a base station, and configuration parameters are sent to the UE for transmitting the SRS. Additionally or alternatively, the UE is configured to determine one or more parameters of the SRS transmission opportunities 307 and 309 as discussed herein.

[0081] In some implementations, the configuration parameters for the SRS transmission timing may include a comb size configuration (also referred to herein as comb size). The comb size configuration may determine how many SRSs may be multiplexed. For example, a comb 1 configuration includes a configuration in which SRSs are not multiplexed. A comb 2 configuration may include a configuration in which 2 SRSs are multiplexed. A comb 4 configuration includes a configuration in which 4 SRSs are multiplexed. A comb 8 configuration includes a configuration in which 8 SRSs are multiplexed. These multiplexed SRSs are sent by different UEs. For example, for a comb 4 configuration, four different UEs may send their SRSs located in different subcarriers at the same SRS transmission timing (thus, 4 SRSs are multiplexed).

[0082] In some implementations, the configuration parameters for SRS transmission opportunities can include the number of symbols available for SRS transmission.

[0083] In some implementations, the configuration parameters for the SRS transmission timing may include a comb offset. According to some aspects, the comb offset may define the resource elements used for the SRS transmission timing as compared to the resource elements using the subcarrier with the lowest frequency. In some examples, such as Figure 3 As illustrated in FIG. 4 for a comb 4 configuration, four comb offsets may be used—comb offset 0, comb offset 1, comb offset 2, and comb offset 3. The comb offsets may be used to multiplex the SRS.

[0084] In the current implementation, when the base station configures the comb offset for a UE, the base station does not change the comb offset for the UE for different SRS transmission opportunities. For example, if the base station configures a comb offset of 0 for a first UE and a comb offset of 0 for a second UE, the first UE and the second UE will cause their SRS to collide, and the base station does not change the comb offset for the first UE and the second UE. However, aspects of the present disclosure relate to changing the comb offset for each UE for an SRS transmission opportunity to reduce the possibility of interference.

[0085] In some implementations, each SRS transmission opportunity may include one or more resource elements. The one or more resource elements in the SRS transmission opportunity may be associated with the same symbol and distributed across subcarriers based on comb tooth offsets. Figure 3 As illustrated, comb offset 0 311a defines one or more resource elements for SRS transmission opportunities with an offset of 0 compared to resource elements utilizing subcarriers with the lowest frequency. Comb offset 1 311b defines one or more resource elements for SRS transmission opportunities with an offset of 1 compared to resource elements utilizing subcarriers with the lowest frequency. Comb offset 2 311c defines one or more resource elements for SRS transmission opportunities with an offset of 2 compared to resource elements utilizing subcarriers with the lowest frequency. Comb offset 3 311d defines one or more resource elements for SRS transmission opportunities with an offset of 3 compared to resource elements utilizing subcarriers with the lowest frequency. Comb offsets 0-3 are repeated toward subcarriers with the highest frequency. According to some implementations, the number of available comb offsets depends on the comb size configuration.

[0086] According to some aspects, system 100 is configured to implement comb offset hopping for SRS interference randomization for each UE. Comb offset hopping for SRS interference randomization can be used for frequency domain interference randomization. Figure 3 An exemplary comb offset hopping for SRS interference randomization for each UE is illustrated. Figure 3 An exemplary comb offset jump of is an intra-slot comb offset jump. As discussed in more detail below, Figure 4B Exemplary inter-slot comb offset transitions are illustrated.

[0087] According to some aspects, the UE and / or the base station are configured to determine (e.g., configure) a comb offset for each SRS transmission opportunity to achieve comb offset hopping for the UE. The base station may communicate the configured comb offset to the UE so that the UE can use the configured comb offset to send the SRS. In some examples, the base station may use an RRC message to communicate the configured comb offset to the UE. The base station may use other messages to communicate the configured comb offset to the UE. In some specific implementations, the base station may communicate the configured comb offset to the UE while the UE is connected to the base station. Additionally or alternatively, the base station may communicate the configured comb offset to the UE one or more times during the period when the UE is connected to the base station.

[0088] Alternatively, the UE is configured to determine (e.g., configure) a comb offset for each SRS transmission opportunity to achieve comb offset hopping for the UE. The UE may determine (e.g., configure) a comb offset for each SRS transmission opportunity to achieve comb offset hopping using one or more parameters received by the UE from the base station using the method discussed herein.

[0089] exist Figure 3 In the exemplary comb offset hopping of , the first SRS transmission opportunity 307 may have a comb offset of 0 (311a) for transmitting the first SRS. In other words, the base station has configured the comb offset for the first SRS transmission opportunity 307 for the UE as comb offset 0 (311a). For the second SRS transmission opportunity 309 for transmitting the second SRS, the base station has configured the comb offset for the UE as comb offset 2 (311c). Therefore, by changing the comb offset for different SRS transmission opportunities 307 and 309 for each UE, the probability of interference between SRS transmissions of different UEs is reduced.

[0090] According to some aspects, the comb offset for each SRS transmission opportunity may be determined as:

[0091] CombOffset(k)=mod(CombOffset+F(mod(k, COMB)), COMB) equation (1).

[0092] Here, k is a non-negative integer indicating the SRS transmission timing. For example, k=0, 1, 2, 3, ... In addition, COMB is a comb tooth size configuration configured by RRC. For example, COMB is a comb tooth 1 configuration, a comb tooth 2 configuration, a comb tooth 4 configuration, or a comb tooth 8 configuration, etc.

[0093] In equation (1), mod is a modulo operation. In addition, CombOffset is a comb offset configured by RRC. Here, F is an offset applied to the comb offset configured by RRC. And, CombOffset(k) is a comb offset for SRS transmission timing k. According to some aspects, the UE is configured to determine CombOffset(k) based on COMB (RRC configured comb size configuration) and CombOffset (RRC configured comb offset) using equation 1. In some specific implementations, CombOffset is a comb offset configured by, for example, a base station and transmitted to the UE.

[0094] In some implementations, when comb offset hopping is supported, the function F(F(mod(k, COMB))—the offset of the comb offset applied to the RRC configured comb offset) may include one or more of the sequences, including:

[0095] {0,1} for comb 2 configuration of RRC configuration;

[0096] {0,3,2,1}, {0,1,2,3} or {0,2,1,3} for a comb 4 configuration of RRC configuration; and

[0097] {0,1,2,3,4,5,6,7}, {0,3,6,1,4,7,2,5}, {0,5,2,7,4,1,6,3}, {0,7,6,5,4,3,2,1} or {0,4,2,6,1,5,3,7} for the comb 8 configuration of RRC configuration.

[0098] However, aspects of the present disclosure are not limited to these examples, and other functions and / or sequences may be used for the function F((mod(k, COMB))—offset of the comb offset applied to the RRC configuration).

[0099] According to some implementations, mod(k, COMB) in F(mod(k, COMB)) provides an index for the sequence associated with the function. In a non-limiting example, if the sequence {0, 1, 2, 3, 4, 5, 6, 7} is used for function F and if mod(k, COMB) = 3, then F(mod(k, COMB)) will be 2 (index 3 in the sequence {0, 1, 2, 3, 4, 5, 6, 7}).

[0100] According to some implementations, the base station may configure the UE to use one or more of the sequences discussed above for function F ((mod(k, COMB))—offset applied to the RRC configured comb offset). For example, the base station may use an RRC message to let the UE know which set to use. For example, for a comb 8 configuration, the UE may have multiple choices for function F. In this example, the base station may let the UE know which set to use for function F.

[0101] Figure 4A An exemplary intra-slot comb offset transition 400 is illustrated in accordance with some aspects of the present disclosure. Figure 4A Four time slots 401a-401d are illustrated, where time slots 401a and 401c include SRS transmissions. In the intra-time slot comb offset hopping 400, comb offset hopping is performed within a time slot (e.g., time slots 401a and 401c). In this example, SRS transmission opportunities 403a and 403b have a first comb offset (e.g., comb offset 0). SRS transmission opportunity 403a has two symbols, and SRS transmission opportunity 403b also has two symbols.

[0102] In this example, SRS transmission opportunities 405a and 405b have a second comb offset (e.g., comb offset 3). Therefore, a comb offset jump has occurred between SRS transmission opportunities 403a and SRS transmission opportunities 405a (and between SRS transmission opportunities 403b and SRS transmission opportunities 405b). SRS transmission opportunity 405a has two symbols, and SRS transmission opportunity 405b also has two symbols.

[0103] The number of symbols used for each SRS transmission opportunity and the number of comb offset jumps in each time slot are Figure 4A The examples are provided as examples, and they do not limit the aspects of the present disclosure.

[0104] According to some implementations, the number of comb offsets used for intra-slot comb offset hopping in each time slot may be determined by the number of symbols used for SRS transmission and the repetition factor. For example, the number of comb offsets used for intra-slot comb offset hopping in each time slot may be determined by dividing the number of symbols used for SRS transmission by the repetition factor. Figure 4A In the example of , the number of symbols used for SRS transmission is 4 and the repetition factor is 2. Therefore, in this non-limiting example, the number of comb offsets used for intra-slot comb offset hopping in each time slot is 2. In some implementations, the number of symbols and the repetition factor used for SRS transmission are configured by the base station and indicated in the RRC message. For example, the number of symbols and the repetition factor used for SRS transmission can be in the SRS resource message.

[0105] According to some examples, the number of symbols used for SRS transmission may include 2, 4, 8, 10, 12, and 14. The repetition factor may include a number that the number of symbols used for SRS transmission can be divided by. For example, for the number of symbols used for SRS transmission being 12, the repetition factor may include 1, 2, 3, 4, 6, or 12.

[0106] Figure 4B An exemplary inter-slot comb offset transition 420 is illustrated in accordance with some aspects of the present disclosure. Figure 4B Four time slots 401a-401d are illustrated, where time slots 401a and 401c include SRS transmissions. In the inter-time slot comb offset hopping 420, comb offset hopping is performed between time slots (e.g., time slots 401a and 401c). In this example, SRS transmission opportunity 423 has a first comb offset (e.g., comb offset 0). SRS transmission opportunity 423 has four symbols. In this example, SRS transmission opportunity 425 has a second comb offset (e.g., comb offset 3). Therefore, a comb offset hopping has occurred between SRS transmission opportunity 423 and SRS transmission opportunity 425. SRS transmission opportunity 425 has four symbols.

[0107] According to some implementations, the comb offset jumps within a time slot (e.g., Figure 4A ) can be combined with the inter-slot comb offset jump (for example, Figure 4B ) combination. In other words, the comb offset may change within each time slot. Additionally, the comb offset may change between time slots. In a non-limiting example, the comb offset may change from comb offset 0 to comb offset 1 within a first time slot. Then, the comb offset may change from comb offset 1 to comb offset 2 in a second time slot. The comb offset may change from comb offset 2 to comb offset 3 within a second time slot.

[0108] According to some specific implementations, if comb offset hopping is supported, the base station and / or UE may be configured to determine the SRS transmission timing (k in equation (1)) for comb offset hopping. For example, for comb offset hopping, the SRS transmission timing may be defined on the basic time unit where the comb offset hopping occurs.

[0109] In some implementations, for intra-slot comb offset hopping, the SRS transmission timing (k in equation (1)) can be determined by the number of symbols used for SRS transmission and the repetition factor. For example, the SRS transmission timing (k in equation (1)) can be determined by dividing the number of symbols used for SRS transmission by the repetition factor. Figure 4A In the example of , the number of symbols used for SRS transmission is 4 and the repetition factor is 2. Therefore, in this non-limiting example, the SRS transmission opportunity (k in equation (1)) can be every 2 symbols used for SRS transmission. Figure 4A , the SRS transmission timing 403a may be 0 (k=0), the SRS transmission timing 405a may be 1 (k=1), the SRS transmission timing 403b may be 2 (k=2), and the SRS transmission timing 405b may be 3 (k=3).

[0110] In some implementations, for inter-slot comb offset hopping, the SRS transmission opportunity (k in equation (1)) may be every slot with SRS transmission. Figure 4B , the SRS transmission timing 423 may be 0 (k=0) and the SRS transmission timing 425 may be 1 (k=1).

[0111] In some implementations, the SRS transmission timing (k in equation (1)) may be determined as discussed above, but frequency hopping for SRS transmission is also taken into account. In some examples, the SRS transmission timing (k in equation (1)) may be determined only in SRS symbols / time slots (e.g., SRS transmission timings) that share the same frequency position. Alternatively, the SRS transmission timing (k in equation (1)) may be determined only in SRS symbols / time slots (e.g., SRS transmission timings) that have different frequency positions.

[0112] According to some specific implementations, even if two UEs transmit their respective SRSs once in the same SRS transmission opportunity, by using offset comb hopping, the base station can reduce the probability that the UE uses the same SRS transmission opportunity for subsequent SRS transmissions of the UE. In other words, by using comb offset hopping to change the mode of SRS transmission, the probability of SRS collision between UEs can be reduced.

[0113] Figure 5 An example method 500 of a system (eg, a UE) for supporting a mechanism for comb offset hopping for SRS interference randomization according to some aspects of the present disclosure is illustrated. For convenience and not limitation, the Figure 1 To describe the elements of Figure 4 Figure 5 Method 500 may be indicative of an electronic device (eg, Figure 1 Method 500 may also be performed by Figure 2 System 200 and / or Fig.10 However, the method 500 is not limited to the specific aspects depicted in those figures, and other systems may be used to perform the method as will be understood by those skilled in the art. It should be understood that not all operations may be required, and these operations may not be performed in the same manner as described above. Figure 5 The same sequence as shown is performed.

[0114] At 502, a comb offset for each SRS transmission opportunity is determined. For example, a UE (e.g., UE 105) may determine a comb offset for each SRS transmission opportunity for the UE. For example, the UE may determine a comb offset for each SRS transmission opportunity in a plurality of SRS transmission opportunities for the UE. The comb offset changes between different SRS transmission opportunities of the UE. As discussed above, the UE may determine the SRS transmission opportunity. The UE may determine the comb offset for each SRS transmission opportunity for the UE using, for example, equation (1) discussed above.

[0115] At 504, a first SRS for a first transmission opportunity is generated using the determined comb offset corresponding to a first SRS transmission opportunity among the plurality of SRS transmission opportunities. For example, the UE may generate the first SRS for the first transmission opportunity using the determined comb offset corresponding to the first transmission opportunity among the plurality of SRS transmission opportunities. At 506, the UE may transmit the first SRS to the base station.

[0116] For example, for the first SRS transmission opportunity (k=0), the UE determines a first comb tooth offset. The UE uses the first comb tooth offset to generate and transmit the SRS of the UE during the first SRS transmission opportunity. For the second SRS transmission opportunity (k=1), the UE determines a second comb tooth offset that is different from the first comb tooth offset. The UE uses the second comb tooth offset to generate and transmit the SRS of the UE during the second SRS transmission opportunity. For the third SRS transmission opportunity (k=2), the UE determines a third comb tooth offset that is different from the second comb tooth offset. The UE uses the third comb tooth offset to generate and transmit the SRS of the UE during the third SRS transmission opportunity. And so on, as described above with respect to Figure 3 , Figure 4A and Figure 4B discussed.

[0117] In some examples, method 500 also includes: determining a comb offset for each SRS transmission opportunity a number of times within the time slot (e.g., the comb offset jump within the time slot discussed above). The number of times can be determined by dividing the number of symbols used for SRS transmission by the repetition factor. In some examples, the UE is configured to determine the number of symbols and the repetition factor used for SRS transmission based on an RRC message received from a base station.

[0118] In some examples, method 500 may also include determining a comb offset for each SRS transmission opportunity once in a time slot (eg, the inter-time slot comb offset hopping discussed above).

[0119] In some examples, method 500 may further include: when multiple SRS transmission opportunities share the same frequency position, determining a comb offset for each SRS transmission opportunity. Additionally or alternatively, method 500 may further include: when multiple SRS transmission opportunities have different frequency positions, determining a comb offset for each SRS transmission opportunity.

[0120] In addition to or as an alternative to comb offset hopping for frequency domain interference randomization, Figure 1 The system 100 may be configured to implement code domain interference randomization. In some aspects, code domain randomization may include using different SRS base sequences for different UEs. Additionally or alternatively, code domain interference randomization may include cyclic shift (CS) hopping for each UE.

[0121] According to some aspects, a UE (e.g., UE 105) may use an SRS base sequence to generate an SRS for the UE to send to a base station (e.g., base station 105). In some implementations, the SRS base sequence may include a low peak-to-average power ratio (PAPR) sequence. In some examples, 30 groups of low PAPR sequences may be defined, each of which may include 2 SRS base sequences (e.g., SRS base sequence 0 and SRS base sequence 1). Thus, a total of 60 SRS base sequences may be defined. However, aspects of the present disclosure are not limited to this example and may include any other number of groups and / or SRS base sequences.

[0122] According to some aspects, the base station may configure and / or allow different UEs to use different SRS base sequences (e.g., SRS base sequence hopping). Therefore, if two UEs use different SRS base sequences but send their SRSs in the same SRS transmission opportunity, the base station may be configured to receive and decode the two SRSs because the two SRSs use different SRS base sequences.

[0123] Without SRS base sequence hopping, each UE may use SRS base sequence 0. According to some aspects, by using SRS base sequence hopping, each UE may use SRS base sequence 0 or SRS base sequence 1. Additionally or alternatively, by using SRS base sequence hopping, the UE may use SRS base sequences from different SRS base sequence groups (e.g., a group of low PAPR sequences).

[0124] According to some aspects, when the base station has configured group or sequence hopping to "neither" or "groupHopping" (e.g., groupOrSequenceHopping = "neither" or "groupHopping"), the base station may configure (and / or allow) the UE to use SRS base sequence hopping. In this case, the base station may set the SRS base sequence index in a message to the UE (e.g., an SRS resource message). An exemplary SRS resource message with an SRS base sequence index (basesequenceId INTEGER (0..1), OPTIONAL) is shown below. For example, by setting the SRS base sequence index to 0, the base station may configure the UE to use SRS base sequence 0. By setting the SRS base sequence index to 1, the base station may configure the UE to user SRS base sequence 1.

[0125] SRS-Resource::=SEQUENCE{

[0126] srs-ResourceId SRS-ResourceId,

[0127] nrofSRS-Ports ENUMERATED{port1,ports2,ports4},

[0128] ptrs-PortIndex ENUMERATED{n0,n1}OPTIONAL,--Need R

[0129] …

[0130] sequenceId INTEGER(0..1023),

[0131] basesequenceId INTEGER(0..1),OPTIONAL

[0132] spatialRelationInfo SRS-SpatialRelationInfo

[0133] …

[0134] Aspects of the present disclosure are not limited to these examples, and the base station may use other messages and / or methods to configure different UEs to use different SRS base sequences and / or different SRS base sequence groups.

[0135] In addition to or as an alternative to using SRS base sequence hopping, Figure 1The system 100 may use cyclic shift (CS) hopping to achieve code domain interference randomization to reduce interference between SRS transmissions of different UEs. Cyclic shifts are used on top of the SRS base sequence to create orthogonal SRS ports for SRS transmissions. According to some implementations, the maximum number of cyclic shifts that a UE can use for its SRS is a function of the comb size configuration (also referred to herein as comb size). For example, the maximum number of cyclic shifts for a comb 2 configuration (comb size of 2) is It can be 8. For example, the maximum number of cyclic shifts for a comb 4 configuration (comb size is 4) is It can be 12. For example, the maximum number of cyclic shifts for a comb-tooth 8 configuration (comb size is 8) is It can be 6.

[0136] According to some aspects, there may be orthogonal SRS, each SRS contains entries. In some implementations, the SRS may be constructed by a DFT sequence (Discrete Fourier Transform). In some implementations, the base station configures the index of the cyclic shift to be used by each UE. For example, the base station may transmit a message to the UE with the index of the cyclic shift used by the UE. In one example, the base station may send the index of the cyclic shift via RRC in the cyclicShift in the SRS resource message. The circular shift is used to create N for each comb tooth offset p orthogonal SRS ports.

[0137] According to some aspects, in addition to the index of the cyclic shift configured by the base station, the UE (and / or the base station) may also use cyclic shift hopping. Thus, if two UEs are configured with the same cyclic shift by the base station, the UEs may use cyclic shift hopping to change their corresponding cyclic shifts for SRS transmission opportunities in order to reduce interference between SRS transmissions.

[0138] Figure 6 Exemplary cyclic shift hopping for SRS interference randomization according to some aspects of the present disclosure is illustrated.Cyclic shift hopping for SRS interference randomization may be used for code domain interference randomization. Figure 6 The cyclic shift jump is illustrated as having no above relative to Figures 3 to 5 Any comb offset jump discussed. Figure 6 It is illustrated as having comb offset 0 611a. However, as described above, comb offset hopping and cyclic shift hopping may be combined.

[0139] Figure 6A plurality of resource elements 601 are illustrated. According to some aspects, a UE (e.g., UE 105) may be configured to transmit an SRS at one or more SRS transmission opportunities (e.g., SRS resources) 607 and 609. In some implementations, the SRS transmission opportunities 607 and 609 are configured by a base station, and configuration parameters are sent to the UE for transmitting the SRS. Additionally or alternatively, the UE is configured to determine one or more parameters of the SRS transmission opportunities 607 and 609 as discussed herein. In some implementations, each SRS transmission opportunity may include one or more resource elements. One or more resource elements in an SRS transmission opportunity may be associated with the same symbol and distributed over subcarriers based on comb tooth offsets.

[0140] In the current implementation, when the base station configures a cyclic shift for a UE, the base station does not change the cyclic shift for the UE for different SRS transmission opportunities. For example, if the base station configures a cyclic shift with index 1 for a first UE and a cyclic shift with the same index 1 for a second UE, then if the first UE and the second UE transmit their SRS at the same SRS transmission opportunity, the first UE and the second UE will cause their SRS to collide, and the base station will not change the cyclic shift for the first UE and the second UE. However, aspects of the present disclosure relate to changing the cyclic shift for the SRS transmission opportunity for each UE to reduce the possibility of interference.

[0141] According to some aspects, system 100 is configured to implement cyclic shift hopping for SRS interference randomization for each UE.Cyclic shift hopping for SRS interference randomization can be used for code domain interference randomization. Figure 6 An exemplary cyclic shift hopping for SRS interference randomization for each UE is illustrated. Figure 6 An exemplary cyclic shift hopping of is an intra-slot cyclic shift hopping. As discussed in more detail below, Figure 7B Exemplary inter-slot cyclic shift hopping is illustrated.

[0142] According to some aspects, the UE and / or the base station are configured to determine (e.g., configure) a cyclic shift for each SRS transmission opportunity to achieve cyclic shift hopping for the UE. The base station may communicate the configured cyclic shift to the UE so that the UE can use the configured cyclic shift to send the SRS. In some examples, the base station may use an RRC message to communicate the configured cyclic shift to the UE. The base station may use other messages to communicate the configured comb offset to the UE. In some specific implementations, the base station may communicate the configured cyclic shift to the UE when the UE is connected to the base station. Additionally or alternatively, the base station may communicate the configured cyclic shift to the UE one or more times during the period when the UE is connected to the base station.

[0143] Alternatively, the UE is configured to determine (e.g., configure) a cyclic shift for each SRS transmission opportunity to achieve cyclic shift hopping for the UE. The UE may determine (e.g., configure) a cyclic shift for each SRS transmission opportunity to achieve comb offset hopping using one or more parameters received by the UE from the base station using the method discussed herein.

[0144] exist Figure 6 In the exemplary cyclic shift hopping of , a comb 4 configuration (comb size 4) is used with a maximum number of cyclic shifts of 12. In this example, an orthogonal SRS with a distance of 2 cyclic shifts between orthogonal SRSs is generated. However, aspects of the present disclosure may include other comb sizes and other numbers of orthogonal sequences. In some examples, transmission opportunity 607 is used for illustrative purposes. The SRS under SRS transmission opportunity 607 includes 6 orthogonal ports with equal distances of 2 cyclic shifts, and cyclic shifts with indices 1, 3, 5, 7, 9, and 11 may be used for each of the 6 SRS orthogonal ports. In another example, an orthogonal SRS with a distance of 3 cyclic shifts between orthogonal SRS ports may be generated. In this example, the SRS at the SRS transmission opportunity 607 includes 4 orthogonal SRS ports of equal distance with 3 cyclic shifts, and cyclic shifts with indexes 1, 4, 7, and 10 may be used for each of the 4 orthogonal SRS ports, respectively.

[0145] For the transmission occasion 609 for illustrative purposes, the UE may use cyclic shift hopping to use a different cyclic shift compared to the transmission occasion 607. For example, by using cyclic shift hopping, the SRS at the SRS transmission occasion 609 may use a cyclic shift with indices 2, 4, 6, 8, 10, 0 for each of the 6 orthogonal SRS ports. In another example, an orthogonal SRS with a distance of 3 cyclic shifts between the orthogonal SRS ports may be generated. In this example, the SRS at the SRS transmission occasion 609 may use a cyclic shift with indices 2, 5, 8, 11 for each of the 4 orthogonal SRS ports.

[0146] Therefore, by changing the cyclic shift for different SRS transmission occasions for each UE, the probability of interference between SRS transmissions of different UEs is reduced.

[0147] According to some aspects, the cyclic shift for each SRS transmission opportunity may be determined as:

[0148]

[0149] Here, k is a non-negative integer indicating the SRS transmission timing. For example, k = 0, 1, 2, 3, ... In addition, The maximum number of cyclic shifts derived from the comb size configuration configured by RRC. For example, COMB is comb 1 configuration, comb 2 configuration, comb 4 configuration, or comb 8 configuration, etc.

[0150] In equation (2), mod is a modulo operation. In addition, CyclicShift is the RRC-configured cyclic shift. Here, F is the offset applied to the RRC-configured cyclic shift. And, CyclicShift(k) is the cyclic shift for SRS transmission opportunity k. According to some aspects, the UE is configured to determine CyclicShift(k) based on COMB (RRC-configured comb size configuration—for example, based on the maximum number of cyclic shifts derived from the RRC-configured comb size configuration) and CyclicShift (RRC-configured cyclic shift) using equation (2). In some specific implementations, CyclicShift is an RRC-configured cyclic shift configured by, for example, a base station and transmitted to the UE.

[0151] In some implementations, when cyclic shift hopping is supported, the function — offset of the cyclic shift applied to the RRC configuration) may include one or more of the sequences including:

[0152] The maximum number of cyclic shifts is {0,1,2,3,4,5}, {0,2,4,1,3,5}, {0,3,1,4,2,5}, or {0,5,4,3,2,1};

[0153] The maximum number of cyclic shifts is {0,1,2,3,4,5,6,7}, {0,4,2,6,1,5,3,7}, {0,3,6,1,4,7,2,5}, {0,5,2,7,4,1,6,3}, {0,7,6,5,4,3,2,1}, or {0,4,2,6,1,5,3,7};

[0154] The maximum number of cyclic shifts is {0,1,2,3,4,5,6,7,8,9,10,11}, {0,6,3,9,2,8,4,10,1,7,5,11}, {0,3,6,9,1,4,7,10,2,5,8,11}, {0,5,10,3,8,1,6,11,4,9,2,7}, {0,7,2,9,4,11,6,1,8,3,10,5}, {0,11,10,9,8,7,6,5,4,3,2,1}.

[0155] However, aspects of the present disclosure are not limited to these examples, and other functions and / or sequences may be used for the functions. —Offset of cyclic shift applied to RRC configuration).

[0156] According to some specific implementations, In Provides an index for a sequence associated with a function. In a non-limiting example, if the sequence {0,1,2,3,4,5,6,7} is used for function F, and if but will be 2 (index 3 in the sequence {0,1,2,3,4,5,6,7}).

[0157] According to some specific implementations, the base station may configure the UE to use the above description for the function F — offset of the cyclic shift applied to the RRC configuration) discussed above. For example, the base station may use an RRC message to let the UE know which set to use. For example, for a comb 8 configuration, the UE may have multiple choices for function F. In this example, the base station may let the UE know which set to use for function F.

[0158] Fig. 7A An exemplary intra-slot cyclic shift hopping 700 is illustrated in accordance with some aspects of the present disclosure. Fig. 7A Four time slots 701a-701d are illustrated, where time slots 701a and 701c include SRS transmissions. In the intra-time slot cyclic shift hopping 700, cyclic shift hopping is performed within a time slot (e.g., time slots 701a and 701c). In this example, SRS transmission opportunities 703a and 703b have a first cyclic shift (e.g., starting with a cyclic shift with index 0). SRS transmission opportunity 703a has two symbols, and SRS transmission opportunity 703b also has two symbols.

[0159] In this example, SRS transmission opportunities 705a and 705b have a second cyclic shift (e.g., starting with a cyclic shift with index 5). Therefore, a cyclic shift jump has occurred between SRS transmission opportunities 703a and 705a (and between SRS transmission opportunities 703b and 705b). SRS transmission opportunity 705a has two symbols, and SRS transmission opportunity 705b also has two symbols.

[0160] The number of symbols used for each SRS transmission opportunity and the number of cyclic shift hops in each slot are Fig. 7A The examples are provided as examples, and they do not limit the aspects of the present disclosure.

[0161] According to some implementations, the number of cyclic shifts used for intra-slot cyclic shift hopping in each time slot may be determined by the number of symbols used for SRS transmission and the repetition factor. For example, the number of cyclic shifts used for intra-slot cyclic shift hopping in each time slot may be determined by dividing the number of symbols used for SRS transmission by the repetition factor. Fig. 7A In the example of , the number of symbols used for SRS transmission is 4 and the repetition factor is 2. Therefore, in this non-limiting example, the number of cyclic shifts used for intra-slot comb offset hopping in each time slot is 2. In some implementations, the number of symbols and the repetition factor used for SRS transmission are configured by the base station and indicated in the RRC message. For example, the number of symbols and the repetition factor used for SRS transmission can be in the SRS resource message.

[0162] Figure 7B An exemplary inter-slot cyclic shift hopping 720 is illustrated in accordance with some aspects of the present disclosure. Figure 7B Four time slots 701a-701d are illustrated, where time slots 701a and 701c include SRS transmissions. In the inter-time slot cyclic shift hopping 720, cyclic shift hopping is performed between time slots (e.g., time slots 701a and 701c). In this example, SRS transmission opportunity 723 has a first cyclic shift (e.g., starting with a cyclic shift with index 0). SRS transmission opportunity 723 has four symbols. In this example, SRS transmission opportunity 725 has a second cyclic shift (e.g., starting with a cyclic shift with index 5). Therefore, a cyclic shift hopping has occurred between SRS transmission opportunity 723 and SRS transmission opportunity 725. SRS transmission opportunity 725 has four symbols.

[0163] According to some implementations, intra-slot cyclic shift hopping (e.g., Fig. 7A ) can be combined with inter-slot cyclic shift hopping (e.g., Figure 7B ) combination. In other words, the cyclic shift can be changed within each time slot. Additionally, the cyclic shift can be changed between time slots. Similarly, FIG. 7A to FIG. 7B The cyclic shift jump can be FIG. 4A to FIG. 4B The comb offset jump combination.

[0164] According to some specific implementations, if cyclic shift hopping is supported, the base station and / or the UE may be configured to determine the SRS transmission timing for cyclic shift hopping (k in equation (2)). For example, for cyclic shift hopping, the SRS transmission timing may be defined on the basic time unit where the cyclic shift hopping occurs. According to some specific implementations, the base station and / or the UE may be configured to determine the SRS transmission timing for cyclic shift hopping (k in equation (2)) in the same manner as discussed above with respect to the base station and / or the UE determining the SRS transmission timing for comb offset hopping (k in equation (1)).

[0165] Figure 8 An example method 800 of a system (eg, a UE) for supporting a mechanism for cyclic shift hopping for SRS interference randomization according to some aspects of the present disclosure is illustrated. For convenience and not limitation, the Figure 1 To describe the elements of Figure 7 Figure 8 Method 800 may be indicative of an electronic device implementing a mechanism for cyclic shift hopping for SRS interference randomization (eg, Figure 1 Method 800 may also be performed by Figure 2 System 200 and / or Fig.10 The method 800 is performed by the computer system 1000. However, the method 800 is not limited to the specific aspects depicted in those figures, and other systems may be used to perform the method, as will be understood by those skilled in the art. It should be understood that not all operations may be required, and these operations may not be performed in the same manner as described above. Figure 8 The same sequence as shown is performed.

[0166] At 802, a cyclic shift for each SRS transmission opportunity is determined. For example, a UE (e.g., UE 105) may determine a cyclic shift for each SRS transmission opportunity for the UE. For example, the UE may determine a cyclic shift for each SRS transmission opportunity in a plurality of SRS transmission opportunities for the UE. The cyclic shift changes between different SRS transmission opportunities of the UE. As discussed above, the UE may determine the SRS transmission opportunity. The UE may use, for example, equation (2) discussed above to determine a cyclic shift for each SRS transmission opportunity for the UE. According to some aspects, the UE determines a cyclic shift for each SRS transmission opportunity for the UE at different symbols (e.g., for different time instances). The cyclic shift changes between different SRS transmission opportunities at different symbols (e.g., for different time instances) of the UE.

[0167] At 804, a first SRS for a first transmission opportunity is generated using a determined cyclic shift corresponding to a first SRS transmission opportunity among a plurality of SRS transmission opportunities. For example, the UE may generate a first SRS for the first transmission opportunity using a determined cyclic shift corresponding to a first transmission opportunity among a plurality of SRS transmission opportunities. At 806, the UE may transmit the first SRS to the base station.

[0168] For example, for a first SRS transmission opportunity (k=0), the UE determines a first cyclic shift (e.g., the first SRS transmission opportunity starts with a cyclic shift having a first index). The UE uses the first cyclic shift to generate and transmit the SRS of the UE during the first SRS transmission opportunity (e.g., during the first symbol). For a second SRS transmission opportunity (k=1), the UE determines a second cyclic shift different from the first cyclic shift (e.g., the second SRS transmission opportunity starts with a cyclic shift having a second index). The UE uses the second cyclic shift to generate and transmit the SRS of the UE during the second SRS transmission opportunity (e.g., during the second symbol). For a third SRS transmission opportunity (k=2), the UE determines a third cyclic shift different from the second cyclic shift (e.g., the third SRS transmission opportunity starts with a cyclic shift having a third index). The UE uses the third cyclic shift to generate and transmit the SRS of the UE during the third SRS transmission opportunity (e.g., during the third symbol). And so on, as described above with respect to Figure 6 , Fig. 7A and Figure 7B discussed.

[0169] In some examples, method 800 also includes: determining a cyclic shift for each SRS transmission opportunity a number of times within the time slot (e.g., the intra-time slot cyclic shift hopping discussed above). The number of times can be determined by dividing the number of symbols used for SRS transmission by the repetition factor. In some examples, the UE is configured to determine the number of symbols and the repetition factor used for SRS transmission based on an RRC message received from a base station.

[0170] In some examples, method 800 may also include determining a cyclic shift for each SRS transmission opportunity once in a time slot (eg, the inter-time slot cyclic shift hopping discussed above).

[0171] In some examples, method 800 may further include: when multiple SRS transmission opportunities share the same frequency position, determining a cyclic shift for each SRS transmission opportunity. Additionally or alternatively, method 800 may further include: when multiple SRS transmission opportunities have different frequency positions, determining a cyclic shift for each SRS transmission opportunity.

[0172] According to some aspects, method 800 may also include: determining an SRS base sequence according to a message from a base station; and generating an SRS using the determined SRS base sequence. For example, the UE may receive a message (e.g., an RRC message and / or an SRS resource message) indicating an SRS base sequence index from a base station. The UE may determine the SRS base sequence according to the SRS base sequence index from the received message. The UE may use the determined SRS base sequence to generate and send the SRS of the UE.

[0173] In addition to or as an alternative to comb offset hopping for frequency domain interference randomization, SRS base sequence hopping for code domain interference randomization, and cyclic shift hopping for code domain interference randomization, Figure 1 The system 100 may be configured to implement power control for SRS interference randomization.

[0174] According to some aspects, and as relative to Figure 1 As discussed, a UE (e.g., UE 105) may communicate with two or more TRPs (e.g., TRP 101). For example, the UE may communicate with base station 107 via TRP 101. According to some aspects, TRP 101a and / or 101b may be coupled to and / or controlled by base station 107. Additionally or alternatively, TRP 101a and / or 101b may be part of base station 107. For example, TRP 101 may include an antenna array (e.g., having one or more antenna elements) that may be used for base station 107 and located at a particular geographic location. In some implementations, each TRP 101 may be part of (and / or coupled to and controlled by) its corresponding base station. However, aspects of the present disclosure are not limited to these examples, and TRP 101 and base station 107 may have other connections and / or relationships. Furthermore, although Figure 1 Two TRPs 101a and 101b are illustrated in FIG, but system 100 may include any number of TRPs (eg, 2, 3, 4, or the like).

[0175] According to some aspects, a base station (e.g., base station 107) may configure SRS power control parameters. The base station may use one or more messages to send the configured SRS power control parameters to the UE. For example, the base station may use one or more RRC messages to send the configured SRS power control parameters to the base station. In some examples, the base station may use one or more SRS resource set messages (also referred to as SRS resource set parameters) to send the configured SRS power control parameters to the UE. In some examples, each SRS resource set message may include one or more SRS resource messages. In other words, the SRS power control parameters in the SRS resource set message may be used for one or more SRS, one or more SRS resources, and one or more SRS transmission opportunities.

[0176] However, when the UE is communicating with multiple TRPs, there may be different path losses between the UE and the TRPs. Therefore, the UE may need to use different powers to send different SRSs to the TRPs. The current implementation of SRS power control parameters does not take these scenarios into account. Some aspects of the present disclosure relate to systems and methods for implementing power control of SRS transmissions to multiple TRPs.

[0177] In some aspects, the SRS power control parameters may include one or more of an open-loop power control (OPLC) path loss compensation factor (also referred to herein as α), an OLPC expected received power at a base station's receiver (or at a TRP's receiver) (also referred to herein as p0), and an OLPC path loss estimation reference signal (also referred to herein as pathlossReferenceRS).

[0178] According to some aspects, when a UE receives SRS power control parameters configured by a base station and sent by the base station, the UE may determine the power that the UE will use to send the UE's SRS to the TRP. For example, based on the OLPC expected received power at the base station's receiver and the OLPC path loss compensation factor, the UE may determine the amount of transmit power used to send the SRS to the base station based on the path loss estimate. In a non-limiting example, if the OLPC expected received power at the base station's receiver is -80dB and the OLPC path loss compensation factor is 1, and the path loss is estimated to be 100dB, the UE may send the UE's SRS at 20dB (100dB-80dB). However, the UE may use other methods to calculate the expected power based on the configured SRS power control parameters.

[0179] Fig.9A An example method 900 of a system (eg, a base station) for supporting a mechanism for SRS power control for SRS interference randomization according to some aspects of the present disclosure is illustrated. For convenience and not limitation, the Figures 1 to 8 elements to describe Fig.9A Method 900 may be indicative of an electronic device (eg, Figure 1 Method 900 may also be performed by Figure 2 System 200 and / or Fig.10 The method 900 is performed by the computer system 1000. However, the method 900 is not limited to the specific aspects depicted in those figures, and other systems may be used to perform the method, as will be understood by those skilled in the art. It should be understood that not all operations may be required, and these operations may not be performed as shown. Fig.9A The same order as shown is followed.

[0180] At 902, a base station may control a first transmit receive point (TRP) and a second TRP associated with the base station.

[0181] At 904, one or more SRS power control parameters are determined. For example, the base station determines SRS power control parameters for use by the UE.

[0182] According to some aspects, the base station configures SRS power control parameters according to SRS resources in the same SRS resource set. As discussed above, an SRS resource set (e.g., an SRS resource set message) may include parameters for one or more SRS resources (e.g., an SRS resource message). An SRS resource may include resource elements (e.g., Figure 3 Additionally or alternatively, the SRS resource may include resource elements that can be used for SRS transmission.

[0183] In these examples, the base station may configure one or more SRS power control parameters for each SRS resource in the same SRS resource set. According to some aspects, the base station may configure one or more SRS power control parameters for each TRP for each SRS resource in the same SRS resource set. In other words, the base station may configure one or more SRS power control parameters for separate TRPs for separate SRS resources in the same SRS resource set. The one or more SRS power control parameters may include one or more of an OPLC path loss compensation factor, an OLPC expected received power at a receiver of the base station, and an OLPC path loss estimation reference signal.

[0184] In a non-limiting example, if the SRS resource set includes two SRS resources and the base station is coupled to two TRPs, the base station may configure an SRS power control parameter for the first TRP in the first SRS resource and may configure an SRS power control parameter for the second TRP in the second SRS resource. The SRS power control parameter for the first TRP may be different from the SRS power control parameter for the second TRP.

[0185] In these examples, if one (or more) of the SRS power control parameters is not configured for the SRS resource (or for the TRP of the SRS resource), the UE may use the SRS power control parameters defined for the SRS resource set. In this case, the base station does not repeat one or more parameters that are the same for the SRS resource and the TRP. In a non-limiting example, the base station may configure different OLPC path loss estimation reference signals for different TRPs in different SRS resources, but does not configure the OPLC path loss compensation factor and the power that the OLPC expects to receive according to the SRS resource. In this example, the UE may use the OPLC path loss compensation factor and the power that the OLPC expects to receive as defined for the SRS resource set for all TRPs. The UE may use an OLPC path loss estimation reference signal specific to each TRP.

[0186] According to some aspects, the base station configures additional SRS power control parameters for additional TRPs in the same SRS resource set. The additional SRS power control parameters may include one or more of an OPLC path loss compensation factor, an OLPC expected received power at a base station's receiver, and an OLPC path loss estimation reference signal. In these specific implementations, the base station may configure a first SRS power control parameter set in an SRS resource set. The UE may use this first SRS power control parameter set for all TRPs unless additional SRS power control parameters are configured for different TRPs. Therefore, if no additional SRS power control parameters are configured for a TRP, the UE uses the first SRS power control parameter set for the TRP. In a non-limiting example where the UE is communicating with two TRPs, in the SRS resource set, a first SRS power control parameter set is configured for the first TRP. The UE may use any additional SRS power control parameters for the second TRP. According to some aspects, the additional SRS power control parameters are different from the first SRS power control parameter set configured for the first TRP. If one or more additional SRS power control parameters are not configured, the UE shall use those parameters from the first set of SRS power control parameters for the second TRP.

[0187] At 906, the configured one or more SRS power control parameters are sent to the UE for the UE to send the SRS to the first TRP and / or the second TRP. For example, the base station sends the configured one or more SRS power control parameters to the UE directly and / or through the TRP. The UE may use the configured one or more SRS power control parameters to determine a transmit power for sending the SRS to the base station and / or the TRP.

[0188] Fig. 9B An example method 920 of a system (eg, a UE) for supporting a mechanism for SRS power control for SRS interference randomization according to some aspects of the present disclosure is illustrated. For convenience and not limitation, the Figures 1 to 9A elements to describe Fig. 9B Method 920 may be indicative of an electronic device implementing a mechanism for SRS power control for SRS interference randomization (eg, Figure 1 Method 920 may also be performed by Figure 2 System 200 and / or Fig.10 The method 920 is performed by the computer system 1000. However, the method 920 is not limited to the specific aspects depicted in those figures, and other systems may be used to perform the method, as will be understood by those skilled in the art. It should be understood that not all operations may be required, and these operations may not be performed as shown. Fig. 9B The same order as shown is followed.

[0189] At 922, one or more configured SRS power control parameters are received at the UE. For example, the UE receives a message (e.g., an RRC message and / or an SRS resource set message) from a base station including one or more SRS power control parameters configured by the base station. The UE may receive the message directly and / or through one or more TRPs. For example, the above with respect to Fig.9A One or more SRS power control parameters configured by a base station are discussed.

[0190] At 924, the UE may use the received one or more SRS power control parameters to determine a transmit power for transmitting the SRS to the base station and / or TRP. According to some aspects, for each SRS resource / SRS resource set, if separate SRS power control parameters are configured for different TRPs, the UE may calculate the expected SRS transmit power (transmit power for transmitting the SRS) for each TRP based on the corresponding SRS power control parameters.

[0191] In some specific implementations, the UE may use the highest expected SRS transmit power among multiple TRPs as the actual SRS transmit power for transmitting the SRS of the UE. For example, the UE may calculate the SRS transmit power for each TRP in multiple TRPs. Then, the UE may determine the SRS transmit power with the highest value. The UE may use the determined highest SRS transmit power to transmit the SRS for multiple TRPs. In other words, the UE uses the same SRS transmit power for multiple TRPs. In some aspects, the UE determines and uses the highest SRS transmit power for each SRS resource.

[0192] In some specific implementations, the UE may use the lowest expected SRS transmit power among multiple TRPs as the actual SRS transmit power for transmitting the SRS of the UE. For example, the UE may calculate the SRS transmit power for each TRP in the multiple TRPs. Then, the UE may determine the SRS transmit power with the lowest value. The UE may use the determined lowest SRS transmit power to transmit the SRS for multiple TRPs. In other words, the UE uses the same SRS transmit power for multiple TRPs. In some aspects, the UE determines and uses the lowest SRS transmit power for each SRS resource.

[0193] In some specific implementations, the UE may use an average (e.g., mean / median) expected SRS transmit power in multiple TRPs as the actual SRS transmit power used to transmit the SRS of the UE. For example, the UE may calculate the SRS transmit power for each TRP in multiple TRPs. The UE may then determine an SRS transmit power with an average value. The UE may use the determined average SRS transmit power to transmit SRS for multiple TRPs. In other words, the UE uses the same SRS transmit power for multiple TRPs. In some aspects, the UE determines and uses an average (e.g., mean / median) SRS transmit power for each SRS resource.

[0194] However, aspects of the present disclosure are not limited to these examples, and the UE may determine the SRS transmission power using other methods.

[0195] For example, various aspects may use one or more computer systems such as Fig.10 The computer system 1000 shown in FIG. 1000 can be any known computer capable of performing the functions described herein, such as Figure 1 Devices 101, 105, 107 and / or Figure 2200. The computer system 1000 includes one or more processors (also referred to as central processing units or CPUs), such as processor 1004. Processor 1004 is connected to a communication infrastructure 1006 (e.g., a bus). The computer system 1000 also includes user input / output devices 1003, such as a monitor, keyboard, pointing device, etc., that communicate with the communication infrastructure 1006 through a user input / output interface 1002. The computer system 1000 also includes a main memory or primary storage 1008, such as a random access memory (RAM). The main memory 1008 may include one or more levels of cache. The main memory 1008 has control logic components (e.g., computer software) and / or data stored therein.

[0196] The computer system 1000 may also include one or more secondary storage devices or memories 1010. The secondary storage 1010 may include, for example, a hard disk drive 1012 and / or a removable storage device or drive 1014. The removable storage drive 1014 may be a floppy disk drive, a tape drive, an optical drive, an optical storage device, a tape backup device, and / or any other storage device / drive.

[0197] The removable storage drive 1014 may interact with a removable storage unit 1018. The removable storage unit 1018 includes a computer usable or readable storage device having computer software (control logic) and / or data stored therein. The removable storage unit 1018 may be a floppy disk, a magnetic tape, a compact disk, a DVD, an optical storage disk, and / or any other computer data storage device. The removable storage drive 1014 reads from and / or writes to the removable storage unit 1018 in a well-known manner.

[0198] According to some aspects, secondary memory 1010 may include other components, tools, or other methods for allowing computer programs and / or other instructions and / or data to be accessed by computer system 1000. Such components, tools, or other methods may include, for example, a removable storage unit 1022 and an interface 1020. Examples of removable storage unit 1022 and interface 1020 may include a program cartridge and cartridge interface (such as found in video game devices), a removable memory chip (such as an EPROM or PROM) and associated sockets, a memory stick and USB port, a memory card and associated memory card slot, and / or any other removable storage unit and associated interface.

[0199] The computer system 1000 may also include a communication or network interface 1024. The communication interface 1024 enables the computer system 1000 to communicate and interact with any combination of remote devices, remote networks, remote entities, etc. (individually and collectively referenced by reference numeral 1028). For example, the communication interface 1024 may allow the computer system 1000 to communicate with the remote device 1028 via a communication path 1026, which may be wired and / or wireless and may include any combination of a LAN, a WAN, the Internet, etc. Control logic components and / or data may be sent to and from the computer system 1000 via the communication path 1026.

[0200] The operations in the foregoing aspects can be implemented in various configurations and architectures. Thus, some or all of the operations in the foregoing aspects can be performed in hardware, software, or in both hardware and software. In some aspects, a tangible, non-transient device or article includes a tangible, non-transient computer-usable or readable medium on which a control logic component (software) is stored, also referred to herein as a computer program product or program storage device. This includes, but is not limited to, computer system 1000, main memory 1008, auxiliary memory 1010, and removable storage units 1018 and 1022, as well as tangible articles embodying any combination of the foregoing. When executed by one or more data processing devices (such as computer system 1000), such control logic components cause such data processing devices to operate as described herein.

[0201] Based on the teachings contained in this disclosure, it will be apparent to those skilled in the relevant art how to use the Fig.10 The various aspects of the present disclosure may be made and used with data processing devices, computer systems, and / or computer architectures other than those shown. In particular, the various aspects may operate with software, hardware, and / or operating system implementations other than those described herein.

[0202] It should be understood that the Detailed Description section, rather than the Summary and Abstract sections, is intended to be used to interpret the claims. The Summary and Abstract sections may set forth one or more but not all exemplary aspects of the present disclosure as contemplated by the inventors, and thus are not intended to limit the present disclosure or the appended claims in any way.

[0203] Although the present disclosure has been described herein with reference to exemplary aspects of exemplary fields and applications, it should be understood that the present disclosure is not limited thereto. Other aspects and modifications are possible and are within the scope and essence of the present disclosure. For example, and without limiting the generality of this paragraph, the various aspects are not limited to the software, hardware, firmware, and / or entities illustrated in the figures and / or described herein. In addition, the various aspects (whether or not explicitly described herein) have significant practicality for fields and applications beyond the examples described herein.

[0204] Various aspects have been described herein by means of functional building blocks that illustrate the specific implementation of specific functions and their relationships. For ease of description, the boundaries of these functional building blocks have been arbitrarily defined herein. As long as the specified functions and relationships (or their equivalents) are properly performed, alternative boundaries may be defined. In addition, alternative aspects may use an order different from the order described herein to perform functional blocks, steps, operations, methods, etc.

[0205] References herein to "one aspect," "aspect," "one example," "example," or similar phrases indicate that the described aspects may include a particular feature, structure, or characteristic, but each aspect may not necessarily include the particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same aspect. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with one aspect, it is within the knowledge of a person skilled in the relevant art to incorporate such feature, structure, or characteristic into other aspects, whether or not explicitly mentioned or described herein.

[0206] The breadth and scope of the present disclosure should not be limited by any of the above-described exemplary aspects, but should be defined only in accordance with the following claims and their equivalents.

[0207] The disclosure anticipates that entities responsible for the collection, analysis, disclosure, transmission, storage or other purposes of such personal information data will comply with sound privacy policies and / or privacy measures. Specifically, such entities should implement and adhere to the use of privacy policies and measures that are recognized as meeting or exceeding the industry or government requirements for maintaining the privacy and security of personal information data. Such policies should be easy for users to access and should be updated as changes in the collection and / or use of data occur. Personal information from users should be collected for legal and reasonable entity purposes and should not be shared or sold outside these legal purposes. In addition, such collection / sharing should only be after receiving the user's informed consent. Additionally, such entities should consider taking any necessary steps to protect and safeguard access to such personal information data, and ensure that other entities with access to personal information data comply with the privacy policies and procedures of other entities. In addition, such entities can subject themselves to third-party assessments to prove that they comply with widely accepted privacy policies and practices. In addition, policies and practices should be adapted to specific types of personal information data collected and / or accessed, and to applicable laws and standards including considerations of special jurisdictions. For example, in the United States, the collection or acquisition of certain health data may be governed by federal and / or state laws, such as the Health Insurance Portability and Accountability Act (HIPAA); while health data in other countries may be subject to other regulations and policies and should be handled accordingly. Therefore, different privacy measures should be advocated for different types of personal data in each country.

Claims

1. A base station, comprising: a transceiver configured to enable wireless communication with a user equipment (UE); and a processor communicatively coupled to the transceiver and configured to: controlling a first transmit receive point (TRP) and a second TRP associated with the base station; configuring one or more sounding reference signal (SRS) power control parameters; and using the transceiver to send the configured one or more SRS power control parameters to the UE, so that the UE can send the SRS to the first TRP or the second TRP, wherein the one or more SRS power control parameters are configured according to SRS resources in an SRS resource set including one or more SRS resources, or The one or more SRS power control parameters include additional parameters for the second TRP in the SRS resource set compared to the parameters for the first TRP.

2. The base station according to claim 1, wherein the one or more SRS power control parameters include one or more of the following: an open-loop power control (OPLC) path loss compensation factor (α), an OLPC expected received power (p0) at the transceiver of the base station, or an OLPC path loss estimation reference signal (pathlossReferenceRS).

3. The base station of claim 1, wherein the one or more SRS power control parameters include a first parameter set for the first TRP and a second parameter set for the second TRP.

4. A base station according to claim 3, wherein the first parameter set for the first TRP enables the UE to determine a first SRS transmit power for the first TRP, and the second parameter set for the second TRP enables the UE to determine a second SRS transmit power for the second TRP. 5 . The base station according to claim 4 , wherein the actual SRS transmission power can be determined by the UE as a highest SRS transmission power between the first SRS transmission power and the second SRS transmission power. 6 . The base station according to claim 4 , wherein actual SRS transmission power can be determined by the UE as an average SRS transmission power between the first SRS transmission power and the second SRS transmission power.

7. A base station according to claim 1, wherein the additional parameters used for the second TRP include one or more of the following: an open-loop power control (OPLC) path loss compensation factor (α), an OLPC expected received power (p0) at the transceiver of the base station, or an OLPC path loss estimation reference signal (pathlossReferenceRS).

8. A method comprising: controlling, by a base station, a first transmit receive point (TRP) and a second TRP associated with the base station; configuring, by the base station, one or more sounding reference signal (SRS) power control parameters; as well as The base station sends one or more configured SRS power control parameters to a user equipment (UE) for the UE to send an SRS to the first TRP or the second TRP, wherein the one or more SRS power control parameters are configured according to SRS resources in an SRS resource set including one or more SRS resources, or The one or more SRS power control parameters include additional parameters for the second TRP in the SRS resource set compared to the parameters for the first TRP.

9. The method of claim 8, wherein the one or more SRS power control parameters include one or more of: an open-loop power control (OPLC) path loss compensation factor (α), an OLPC expected received power (p0) at the transceiver of the base station, or an OLPC path loss estimation reference signal (pathlossReferenceRS).

10. The method of claim 8, wherein the one or more SRS power control parameters include a first parameter set for the first TRP and a second parameter set for the second TRP.

11. The method of claim 10, wherein the first parameter set for the first TRP enables the UE to determine a first SRS transmit power for the first TRP, and the second parameter set enables the UE to determine a second SRS transmit power for the second TRP. 12 . The method according to claim 11 , wherein the actual SRS transmission power can be determined by the UE as a highest SRS transmission power between the first SRS transmission power and the second SRS transmission power. 13 . The method of claim 11 , wherein actual SRS transmission power can be determined by the UE as an average SRS transmission power between the first SRS transmission power and the second SRS transmission power.

14. The method of claim 8, wherein the additional parameters used for the second TRP include one or more of: an open-loop power control (OPLC) path loss compensation factor (α), an OLPC expected received power (p0) at the transceiver of the base station, or an OLPC path loss estimation reference signal (pathlossReferenceRS).

15. A user equipment (UE), the user equipment (UE) comprising: a transceiver configured to enable wireless communication with a base station that controls a first transmit receive point (TRP) and a second TRP associated with the base station; as well as a processor communicatively coupled to the transceiver and configured to: receiving one or more sounding reference signal (SRS) power control parameters configured by the base station; as well as determining an actual SRS transmit power for transmitting the SRS to the first TRP or the second TRP based on the received one or more SRS power control parameters, wherein the one or more SRS power control parameters are configured according to SRS resources in an SRS resource set including one or more SRS resources, or The one or more SRS power control parameters include additional parameters for the second TRP in the SRS resource set compared to the parameters for the first TRP.

16. The UE of claim 15, wherein the received one or more SRS power control parameters include one or more of the following: an open-loop power control (OPLC) path loss compensation factor (α), an OLPC expected received power (p0) at the transceiver of the base station, or an OLPC path loss estimation reference signal (pathlossReferenceRS).

17. The UE of claim 15, wherein the received one or more SRS power control parameters include a first parameter set for the first TRP and a second parameter set for the second TRP.

18. A UE according to claim 17, wherein the processor is also configured to determine a first SRS transmit power for the first TRP based on the first parameter set for the first TRP, and is configured to determine a second SRS transmit power for the second TRP based on the second parameter set for the second TRP. 19 . The UE of claim 18 , wherein the processor is further configured to determine the actual SRS transmission power as a highest SRS transmission power between the first SRS transmission power and the second SRS transmission power. 20 . The UE of claim 18 , wherein the processor is further configured to determine the actual SRS transmission power as an average SRS transmission power between the first SRS transmission power and the second SRS transmission power.

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