# US 2021/0242991 A1 · Using medium access control control elements to schedule semi-persistent sounding reference signals for positioning > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242991 A1 - Document ID: US20210242991A1 - Status: Published application - Kind: A1 - Application number: 17/164,316 - Filed: 2021-02-01 - Published: 2021-08-05 - Earliest claimed: 2020-02-04 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Alexandros MANOLAKOS; Sony AKKARAKARAN; Sven FISCHER - Web page: https://patentgrep.com/patent/US20210242991A1 ## CPC - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 28/26: Resource reservation - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0023: {Time-frequency-space} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 80/02: Data link layer protocols - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) receives, from a serving base station, a medium access control control element (MAC-CE) indicating activation or deactivation of a semi-persistent (SP) sounding reference signal (SRS)-for-positioning, wherein a reserved bit in the MAC-CE or a logical channel identifier (LCID) of a MAC subheader of the MAC-CE indicates the activation or deactivation of the SP SRS-for-positioning, and transmits the SP SRS-for-positioning on one or more SRS resources configured for the UE, the SP SRS-for-positioning having transmission parameters adopted from a spatial relation reference signal for the SP SRS-for-positioning. ## Claims ### Claim 1 A method of wireless communication performed by a user equipment (UE), comprising: receiving, from a serving base station, a medium access control control element (MAC-CE) indicating activation or deactivation of a semi-persistent (SP) sounding reference signal (SRS)-for-positioning, wherein a reserved bit in the MAC-CE or a logical channel identifier (LCD) of a MAC subheader of the MAC-CE indicates the activation or deactivation of the SP SRS-for-positioning; and transmitting the SP SRS-for-positioning on one or more SRS resources configured for the UE, the SP SRS-for-positioning having transmission parameters adopted from a spatial relation reference signal for the SP SRS-for-positioning, wherein a type of the spatial relation reference signal is one of (1) an SRS-for-communication resource, (2) a synchronization signal block (SSB), (3) a channel state information reference signal (CSI-RS) resource, (4) an SRS-for-positioning resource, or (5) a downlink positioning reference signal (DL PRS) resource, wherein the MAC-CE includes at least one three-bit field indicating the type of the spatial relation reference signal, and wherein the MAC-CE further includes at least one spatial relation information field indicating an identifier (ID) of the spatial relation reference signal. ### Claim 2 (depends on 1) The method of claim 1, wherein the SRS-for-communication resource is identified by a five-bit SRS resource ID. ### Claim 3 (depends on 1) The method of claim 1, wherein the SSB is identified by a 16-bit SSB ID and physical cell identity (PCI) of the SSB. ### Claim 4 (depends on 1) The method of claim 1, wherein the CSI-RS resource is identified by an eight-bit CSI-RS resource ID. ### Claim 5 (depends on 1) The method of claim 1, wherein the SRS-for-positioning resource is identified by a five-bit SRS resource ID. ### Claim 6 (depends on 1) The method of claim 1, wherein the DL PRS resource is identified by a 17-bit DL PRS resource ID, DL PRS resource set ID, and transmission-reception point (TRP) ID. ### Claim 7 (depends on 1) The method of claim 1, wherein, based on the type of the spatial relation reference signal, the identifier field includes: the SRS resource ID of the SRS-for-communication resource, an index value into a table of combinations of SSB IDs and PCIs, the CSI-RS resource ID, the SRS resource ID of the SRS-for-positioning resource, or an index value into a table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs. ### Claim 8 (depends on 7) The method of claim 7, further comprising, based on the type of the spatial relation reference signal: receiving, from the serving base station, the table of combinations of SSB IDs and PCIs via radio resource control (RRC) signaling; and/or receiving, from the serving base station, the table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs via RRC signaling. ### Claim 9 (depends on 1) The method of claim 1, wherein the identifier field includes one or more bits indicating whether the type of the spatial relation reference signal is the SRS-for-communication resource or the SRS-for-positioning resource. ### Claim 10 (depends on 9) The method of claim 9, wherein the identifier field includes six bits for the SRS resource ID of the SRS-for-communication resource or the SRS resource ID of the SRS-for-positioning resource. ### Claim 11 (depends on 1) The method of claim 1, wherein the identifier field includes at least one bit indicating whether the type of the spatial relation reference signal is the SSB, the CSI-RS resource, the DL PRS resource, or an SRS resource. ### Claim 12 (depends on 11) The method of claim 11, wherein the identifier field includes a seven-bit index value into a table of combinations of SSB IDs and PCIs, a seven-bit index value into a table of CSI-RS resource IDs, or a seven-bit index value into a table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs. ### Claim 13 (depends on 12) The method of claim 12, further comprising: receiving, from the serving base station, the table of combinations of SSB IDs and PCIs via RRC signaling; receiving, from the serving base station, the table of CSI-RS resource IDs via RRC signaling; and/or receiving, from the serving base station, the table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs via RRC signaling. ### Claim 14 (depends on 1) The method of claim 1, further comprising: receiving a table from the serving base station via RRC signaling, each entry of the table including the type of the spatial relation reference signal and the ID of the spatial relation reference signal. ### Claim 15 (depends on 14) The method of claim 14, wherein the table is for an SRS resource, an SRS resource set, a bandwidth part (BWP), or a component carrier for the SP SRS-for-positioning. ### Claim 16 (depends on 1) The method of claim 1, wherein the identifier field comprises an eight-bit field including the ID of the spatial relation reference signal. ### Claim 17 (depends on 16) The method of claim 16, wherein the eight-bit field is a combination of an Fi field having a length of one bit and a resource IDi field having a length of seven bits. ### Claim 18 (depends on 1) The method of claim 1, further comprising: receiving, from the serving base station via RRC signaling, a configuration of the type of the spatial relation reference signal as the SSB or the DL PRS resource. ### Claim 19 (depends on 1) The method of claim 1, wherein: the LCD indicates the activation or deactivation of the SP SRS-for-positioning, and the MAC-CE includes at least one three-bit Fi field identifying the type of the spatial relation reference signal and at least one spatial relation information field including the ID of the spatial relation reference signal. ### Claim 20 (depends on 1) The method of claim 1, wherein the spatial relation reference signal is a quasi-colocation (QCL) source reference signal. ### Claim 21 A method of wireless communication performed by a base station, comprising: transmitting, to a user equipment (UE), a medium access control control element (MAC-CE) indicating activation or deactivation of a semi-persistent (SP) sounding reference signal (SRS)-for-positioning, wherein a reserved bit in the MAC-CE or a logical channel identifier (LCD) of a MAC subheader of the MAC-CE indicates the activation or deactivation of the SP SRS-for-positioning, wherein the MAC-CE includes an identifier field from which an identifier (ID) of a spatial relation reference signal for the SP SRS-for-positioning can be determined, wherein a type of the spatial relation reference signal is one of (1) an SRS-for-communication resource, (2) a synchronization signal block (SSB), (3) a channel state information reference signal (CSI-RS) resource, (4) an SRS-for-positioning resource, or (5) a downlink positioning reference signal (DL PRS) resource, and wherein the identifier field includes three bits indicating whether the type of the spatial relation reference signal is the SRS-for-communication resource, the SRS-for-positioning resource, the SSB, the CSI-RS resource, or the DL PRS resource; and receiving, from the UE, the SP SRS-for-positioning on one or more SRS resources configured to the UE for transmission of the SP SRS-for-positioning, the SP SRS-for-positioning having transmission parameters adopted from the spatial relation reference signal. ### Claim 22 (depends on 21) The method of claim 21, wherein the SRS-for-communication resource is identified by a five-bit SRS resource identifier (ID). ### Claim 23 (depends on 21) The method of claim 21, wherein the SSB is identified by a 16-bit SSB ID and physical cell identity (PCI) of the SSB. ### Claim 24 (depends on 21) The method of claim 21, wherein the CSI-RS resource is identified by an eight-bit CSI-RS resource ID. ### Claim 25 (depends on 21) The method of claim 21, wherein the SRS-for-positioning resource is identified by a five-bit SRS resource identifier. ### Claim 26 (depends on 21) The method of claim 21, wherein the DL PRS resource is identified by a 17-bit DL PRS resource ID, DL PRS resource set ID, and transmission-reception point (TRP) ID. ### Claim 27 (depends on 21) The method of claim 21, wherein, based on the type of the spatial relation reference signal, the identifier field includes: the SRS resource ID of the SRS-for-communication resource, an index value into a table of combinations of SSB IDs and PCIs, the CSI-RS resource ID, the SRS resource ID of the SRS-for-positioning resource, or an index value into a table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs. ### Claim 28 (depends on 27) The method of claim 27, further comprising, based on the type of the spatial relation reference signal: transmitting, to the UE, the table of combinations of SSB IDs and PCIs via radio resource control (RRC) signaling; and/or transmitting, to the UE, the table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs via RRC signaling. ### Claim 29 (depends on 21) The method of claim 21, wherein the identifier field includes one or more bits indicating whether the type of the spatial relation reference signal is the SRS-for-communication resource or the SRS-for-positioning resource. ### Claim 30 (depends on 29) The method of claim 29, wherein the identifier field includes six bits for the SRS resource ID of the SRS-for-communication resource or the SRS resource ID of the SRS-for-positioning resource. ### Claim 31 (depends on 21) The method of claim 21, wherein the identifier field includes at least one bit indicating whether the type of the spatial relation reference signal is the SSB, the CSI-RS resource, the DL PRS resource, or an SRS resource. ### Claim 32 (depends on 31) The method of claim 31, wherein the identifier field includes a seven-bit index value into a table of combinations of SSB IDs and PCIs, a seven-bit index value into a table of CSI-RS resource IDs, or a seven-bit index value into a table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs. ### Claim 33 (depends on 32) The method of claim 32, further comprising: transmitting, to the UE, the table of combinations of SSB IDs and PCIs via RRC signaling; transmitting, to the UE, the table of CSI-RS resource IDs via RRC signaling; and/or transmitting, to the UE, the table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs via RRC signaling. ### Claim 34 (depends on 21) The method of claim 21, further comprising: transmitting a table to the UE via RRC signaling, each entry of the table including the type of the spatial relation reference signal and the ID of the spatial relation reference signal. ### Claim 35 (depends on 34) The method of claim 34, wherein the table is for an SRS resource, an SRS resource set, a bandwidth part (BWP), or a component carrier for the SP SRS-for-positioning. ### Claim 36 (depends on 21) The method of claim 21, wherein the identifier field comprises an eight-bit field including the ID of the spatial relation reference signal. ### Claim 37 (depends on 36) The method of claim 36, wherein the eight-bit field is a combination of an Fi field having a length of one bit and a resource IDi field having a length of seven bits. ### Claim 38 (depends on 21) The method of claim 21, further comprising: transmitting, to the UE via RRC signaling, a configuration of the type of the spatial relation reference signal as the SSB or the DL PRS resource. ### Claim 39 (depends on 21) The method of claim 21, wherein: the LCID indicates the activation or deactivation of the SP SRS-for-positioning, and the MAC-CE includes at least one three-bit Fi field identifying the type of the spatial relation reference signal and at least one spatial relation information field including the ID of the spatial relation reference signal. ### Claim 40 (depends on 21) The method of claim 21, wherein the spatial relation reference signal is a quasi-colocation (QCL) source reference signal. ### Claim 41 A user equipment (UE), comprising: a memory; at least one transceiver; and at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to: receive, from a serving base station, a medium access control control element (MAC-CE) indicating activation or deactivation of a semi-persistent (SP) sounding reference signal (SRS)-for-positioning, wherein a reserved bit in the MAC-CE or a logical channel identifier (LCID) of a MAC subheader of the MAC-CE indicates the activation or deactivation of the SP SRS-for-positioning; and transmit the SP SRS-for-positioning on one or more SRS resources configured for the UE, the SP SRS-for-positioning having transmission parameters adopted from a spatial relation reference signal for the SP SRS-for-positioning, an identifier (ID) of the spatial relation reference signal determined based on an identifier field for the spatial relation reference signal in the MAC-CE, wherein a type of the spatial relation reference signal is one of (1) an SRS-for-communication resource, (2) a synchronization signal block (SSB), (3) a channel state information reference signal (CSI-RS) resource, (4) an SRS-for-positioning resource, or (5) a downlink positioning reference signal (DL PRS) resource, and wherein the identifier field includes three bits indicating whether the type of the spatial relation reference signal is the SRS-for-communication resource, the SRS-for-positioning resource, the SSB, the CSI-RS resource, or the DL PRS resource. ### Claim 42 (depends on 41) The UE of claim 41, wherein the SRS-for-communication resource is identified by a five-bit SRS resource ID. ### Claim 43 (depends on 41) The UE of claim 41, wherein the SSB is identified by a 16-bit SSB ID and physical cell identity (PCI) of the SSB. ### Claim 44 (depends on 41) The UE of claim 41, wherein the CSI-RS resource is identified by an eight-bit CSI-RS resource ID. ### Claim 45 (depends on 41) The UE of claim 41, wherein the SRS-for-positioning resource is identified by a five-bit SRS resource ID. ### Claim 46 (depends on 41) The UE of claim 41, wherein the DL PRS resource is identified by a 17-bit DL PRS resource ID, DL PRS resource set ID, and transmission-reception point (TRP) ID. ### Claim 47 (depends on 41) The UE of claim 41, wherein, based on the type of the spatial relation reference signal, the identifier field includes: the SRS resource ID of the SRS-for-communication resource, an index value into a table of combinations of SSB IDs and PCIs, the CSI-RS resource ID, the SRS resource ID of the SRS-for-positioning resource, or an index value into a table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs. ### Claim 48 (depends on 47) The UE of claim 47, wherein the at least one processor is further configured to, based on the type of the spatial relation reference signal: receive, from the serving base station, the table of combinations of SSB IDs and PCIs via radio resource control (RRC) signaling; and/or receive, from the serving base station, the table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs via RRC signaling. ### Claim 49 (depends on 41) The UE of claim 41, wherein the identifier field includes one or more bits indicating whether the type of the spatial relation reference signal is the SRS-for-communication resource or the SRS-for-positioning resource. ### Claim 50 (depends on 49) The UE of claim 49, wherein the identifier field includes six bits for the SRS resource ID of the SRS-for-communication resource or the SRS resource ID of the SRS-for-positioning resource. ### Claim 51 (depends on 41) The UE of claim 41, wherein the identifier field includes at least one bit indicating whether the type of the spatial relation reference signal is the SSB, the CSI-RS resource, the DL PRS resource, or an SRS resource. ### Claim 52 (depends on 51) The UE of claim 51, wherein the identifier field includes a seven-bit index value into a table of combinations of SSB IDs and PCIs, a seven-bit index value into a table of CSI-RS resource IDs, or a seven-bit index value into a table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs. ### Claim 53 (depends on 52) The UE of claim 52, wherein the at least one processor is further configured to: receive, from the serving base station, the table of combinations of SSB IDs and PCIs via RRC signaling; receive, from the serving base station, the table of CSI-RS resource IDs via RRC signaling; and/or receive, from the serving base station, the table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs via RRC signaling. ### Claim 54 (depends on 41) The UE of claim 41, wherein the at least one processor is further configured to: receive a table from the serving base station via RRC signaling, each entry of the table including the type of the spatial relation reference signal and the ID of the spatial relation reference signal. ### Claim 55 (depends on 54) The UE of claim 54, wherein the table is for an SRS resource, an SRS resource set, a bandwidth part (BWP), or a component carrier for the SP SRS-for-positioning. ### Claim 56 (depends on 41) The UE of claim 41, wherein the identifier field comprises an eight-bit field including the ID of the spatial relation reference signal. ### Claim 57 (depends on 56) The UE of claim 56, wherein the eight-bit field is a combination of an Fi field having a length of one bit and a resource IDi field having a length of seven bits. ### Claim 58 (depends on 41) The UE of claim 41, wherein the at least one processor is further configured to: receive, from the serving base station via RRC signaling, a configuration of the type of the spatial relation reference signal as the SSB or the DL PRS resource. ### Claim 59 (depends on 41) The UE of claim 41, wherein: the LCD indicates the activation or deactivation of the SP SRS-for-positioning, and the MAC-CE includes at least one three-bit Fi field identifying the type of the spatial relation reference signal and at least one spatial relation information field including the ID of the spatial relation reference signal. ### Claim 60 (depends on 41) The UE of claim 41, wherein the spatial relation reference signal is a quasi-colocation (QCL) source reference signal. ### Claim 61 A base station, comprising: a memory; at least one transceiver; and at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to: transmit, to a user equipment (UE), a medium access control control element (MAC-CE) indicating activation or deactivation of a semi-persistent (SP) sounding reference signal (SRS)-for-positioning, wherein a reserved bit in the MAC-CE or a logical channel identifier (LCID) of a MAC subheader of the MAC-CE indicates the activation or deactivation of the SP SRS-for-positioning, wherein the MAC-CE includes an identifier field from which an identifier (ID) of a spatial relation reference signal for the SP SRS-for-positioning can be determined, wherein a type of the spatial relation reference signal is one of (1) an SRS-for-communication resource, (2) a synchronization signal block (SSB), (3) a channel state information reference signal (CSI-RS) resource, (4) an SRS-for-positioning resource, or (5) a downlink positioning reference signal (DL PRS) resource, and wherein the identifier field includes three bits indicating whether the type of the spatial relation reference signal is the SRS-for-communication resource, the SRS-for-positioning resource, the SSB, the CSI-RS resource, or the DL PRS resource; and receive, from the UE, the SP SRS-for-positioning on one or more SRS resources configured to the UE for transmission of the SP SRS-for-positioning, the SP SRS-for-positioning having transmission parameters adopted from the spatial relation reference signal. ### Claim 62 (depends on 61) The base station of claim 61, wherein the SRS-for-communication resource is identified by a five-bit SRS resource identifier (ID). ### Claim 63 (depends on 61) The base station of claim 61, wherein the SSB is identified by a 16-bit SSB ID and physical cell identity (PCI) of the SSB. ### Claim 64 (depends on 61) The base station of claim 61, wherein the CSI-RS resource is identified by an eight-bit CSI-RS resource ID. ### Claim 65 (depends on 61) The base station of claim 61, wherein the SRS-for-positioning resource is identified by a five-bit SRS resource identifier. ### Claim 66 (depends on 61) The base station of claim 61, wherein the DL PRS resource is identified by a 17-bit DL PRS resource ID, DL PRS resource set ID, and transmission-reception point (TRP) ID. ### Claim 67 (depends on 61) The base station of claim 61, wherein, based on the type of the spatial relation reference signal, the identifier field includes: the SRS resource ID of the SRS-for-communication resource, an index value into a table of combinations of SSB IDs and PCIs, the CSI-RS resource ID, the SRS resource ID of the SRS-for-positioning resource, or an index value into a table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs. ### Claim 68 (depends on 67) The base station of claim 67, wherein the at least one processor is further configured to, based on the type of the spatial relation reference signal: transmit, to the UE, the table of combinations of SSB IDs and PCIs via radio resource control (RRC) signaling; and/or transmit, to the UE, the table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs via RRC signaling. ### Claim 69 (depends on 61) The base station of claim 61, wherein the identifier field includes one or more bits indicating whether the type of the spatial relation reference signal is the SRS-for-communication resource or the SRS-for-positioning resource. ### Claim 70 (depends on 69) The base station of claim 69, wherein the identifier field includes six bits for the SRS resource ID of the SRS-for-communication resource or the SRS resource ID of the SRS-for-positioning resource. ### Claim 71 (depends on 61) The base station of claim 61, wherein the identifier field includes at least one bit indicating whether the type of the spatial relation reference signal is the SSB, the CSI-RS resource, the DL PRS resource, or an SRS resource. ### Claim 72 (depends on 71) The base station of claim 71, wherein the identifier field includes a seven-bit index value into a table of combinations of SSB IDs and PCIs, a seven-bit index value into a table of CSI-RS resource IDs, or a seven-bit index value into a table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs. ### Claim 73 (depends on 72) The base station of claim 72, wherein the at least one processor is further configured to: transmit, to the UE, the table of combinations of SSB IDs and PCIs via RRC signaling; transmit, to the UE, the table of CSI-RS resource IDs via RRC signaling; and/or transmit, to the UE, the table of combinations of DL PRS resource IDs, DL PRS resource set IDs, and TRP IDs via RRC signaling. ### Claim 74 (depends on 61) The base station of claim 61, wherein the at least one processor is further configured to: transmit a table to the UE via RRC signaling, each entry of the table including the type of the spatial relation reference signal and the ID of the spatial relation reference signal. ### Claim 75 (depends on 74) The base station of claim 74, wherein the table is for an SRS resource, an SRS resource set, a bandwidth part (BWP), or a component carrier for the SP SRS-for-positioning. ### Claim 76 (depends on 61) The base station of claim 61, wherein the identifier field comprises an eight-bit field including the ID of the spatial relation reference signal. ### Claim 77 (depends on 76) The base station of claim 76, wherein the eight-bit field is a combination of an Fi field having a length of one bit and a resource IDi field having a length of seven bits. ### Claim 78 (depends on 61) The base station of claim 61, wherein the at least one processor is further configured to: transmit, to the UE via RRC signaling, a configuration of the type of the spatial relation reference signal as the SSB or the DL PRS resource. ### Claim 79 (depends on 61) The base station of claim 61, wherein: the LCID indicates the activation or deactivation of the SP SRS-for-positioning, and the MAC-CE includes at least one three-bit Fi field identifying the type of the spatial relation reference signal and at least one spatial relation information field including the ID of the spatial relation reference signal. ### Claim 80 (depends on 61) The base station of claim 61, wherein the spatial relation reference signal is a quasi-colocation (QCL) source reference signal. ### Claim 81 A user equipment (UE), comprising: means for receiving, from a serving base station, a medium access control control element (MAC-CE) indicating activation or deactivation of a semi-persistent (SP) sounding reference signal (SRS)-for-positioning, wherein a reserved bit in the MAC-CE or a logical channel identifier (LCID) of a MAC subheader of the MAC-CE indicates the activation or deactivation of the SP SRS-for-positioning; and means for transmitting the SP SRS-for-positioning on one or more SRS resources configured for the UE, the SP SRS-for-positioning having transmission parameters adopted from a spatial relation reference signal for the SP SRS-for-positioning, an identifier (ID) of the spatial relation reference signal determined based on an identifier field for the spatial relation reference signal in the MAC-CE, wherein a type of the spatial relation reference signal is one of (1) an SRS-for-communication resource, (2) a synchronization signal block (SSB), (3) a channel state information reference signal (CSI-RS) resource, (4) an SRS-for-positioning resource, or (5) a downlink positioning reference signal (DL PRS) resource, and wherein the identifier field includes three bits indicating whether the type of the spatial relation reference signal is the SRS-for-communication resource, the SRS-for-positioning resource, the SSB, the CSI-RS resource, or the DL PRS resource. ### Claim 82 A base station, comprising: means for transmitting, to a user equipment (UE), a medium access control control element (MAC-CE) indicating activation or deactivation of a semi-persistent (SP) sounding reference signal (SRS)-for-positioning, wherein a reserved bit in the MAC-CE or a logical channel identifier (LCID) of a MAC subheader of the MAC-CE indicates the activation or deactivation of the SP SRS-for-positioning, wherein the MAC-CE includes an identifier field from which an identifier (ID) of a spatial relation reference signal for the SP SRS-for-positioning can be determined, wherein a type of the spatial relation reference signal is one of (1) an SRS-for-communication resource, (2) a synchronization signal block (SSB), (3) a channel state information reference signal (CSI-RS) resource, (4) an SRS-for-positioning resource, or (5) a downlink positioning reference signal (DL PRS) resource, and wherein the identifier field includes three bits indicating whether the type of the spatial relation reference signal is the SRS-for-communication resource, the SRS-for-positioning resource, the SSB, the CSI-RS resource, or the DL PRS resource; and means for receiving, from the UE, the SP SRS-for-positioning on one or more SRS resources configured to the UE for transmission of the SP SRS-for-positioning, the SP SRS-for-positioning having transmission parameters adopted from the spatial relation reference signal. ### Claim 83 A non-transitory computer-readable medium storing computer-executable instructions, the computer-executable instructions comprising: at least one instruction instructing a user equipment (UE) to receive, from a serving base station, a medium access control control element (MAC-CE) indicating activation or deactivation of a semi-persistent (SP) sounding reference signal (SRS)-for-positioning, wherein a reserved bit in the MAC-CE or a logical channel identifier (LCID) of a MAC subheader of the MAC-CE indicates the activation or deactivation of the SP SRS-for-positioning; and at least one instruction instructing the UE to transmit the SP SRS-for-positioning on one or more SRS resources configured for the UE, the SP SRS-for-positioning having transmission parameters adopted from a spatial relation reference signal for the SP SRS-for-positioning, an identifier (ID) of the spatial relation reference signal determined based on an identifier field for the spatial relation reference signal in the MAC-CE, wherein a type of the spatial relation reference signal is one of (1) an SRS-for-communication resource, (2) a synchronization signal block (SSB), (3) a channel state information reference signal (CSI-RS) resource, (4) an SRS-for-positioning resource, or (5) a downlink positioning reference signal (DL PRS) resource, and wherein the identifier field includes three bits indicating whether the type of the spatial relation reference signal is the SRS-for-communication resource, the SRS-for-positioning resource, the SSB, the CSI-RS resource, or the DL PRS resource. ### Claim 84 A non-transitory computer-readable medium storing computer-executable instructions, the computer-executable instructions comprising: at least one instruction instructing a base station to transmit, to a user equipment (UE), a medium access control control element (MAC-CE) indicating activation or deactivation of a semi-persistent (SP) sounding reference signal (SRS)-for-positioning, wherein a reserved bit in the MAC-CE or a logical channel identifier (LCID) of a MAC subheader of the MAC-CE indicates the activation or deactivation of the SP SRS-for-positioning, wherein the MAC-CE includes an identifier field from which an identifier (ID) of a spatial relation reference signal for the SP SRS-for-positioning can be determined, wherein a type of the spatial relation reference signal is one of (1) an SRS-for-communication resource, (2) a synchronization signal block (SSB), (3) a channel state information reference signal (CSI-RS) resource, (4) an SRS-for-positioning resource, or (5) a downlink positioning reference signal (DL PRS) resource, and wherein the identifier field includes three bits indicating whether the type of the spatial relation reference signal is the SRS-for-communication resource, the SRS-for-positioning resource, the SSB, the CSI-RS resource, or the DL PRS resource; and at least one instruction instructing the base station to receive, from the UE, the SP SRS-for-positioning on one or more SRS resources configured to the UE for transmission of the SP SRS-for-positioning, the SP SRS-for-positioning having transmission parameters adopted from the spatial relation reference signal.