# US 2019/0356445 A1 · Use-cases and constraints on multiple srs resource sets for antenna switching in nr rel-15 > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0356445 A1 - Document ID: US20190356445A1 - Status: Published application - Kind: A1 - Application number: 16/413,372 - Filed: 2019-05-15 - Published: 2019-11-21 - Earliest claimed: 2018-05-18 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Alexandros Manolakos - Web page: https://patentgrep.com/patent/US20190356445A1 ## 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 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04B 7/0602: {using antenna switching (H04B7/0686 takes precedence; antenna beam directivity switching H01Q3/24)} - H04B 7/0628: {Diversity capabilities} - H04B 7/0805: {with single receiver and antenna switching (H04B7/0822 takes precedence)} - H04B 7/0404: the mobile station comprising multiple antennas, e.g. to provide uplink diversity - H04L 5/0023: {Time-frequency-space} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION ## Abstract In an aspect, a method of wireless communication includes transmitting a configuration message, by a base station to a user equipment (UE), that configures the UE, according to one or more antenna switching constraints, with multiple sounding reference signal (SRS) resource sets for antenna switching by the UE. The method also includes receiving one or more SRS, by the base station, transmitted by the UE according to the configuration of the multiple SRS resource sets. In another aspect, a method of wireless communication includes receiving a configuration message, by a user equipment (UE) from a base station, that configures the UE, according to one or more antenna switching constraints, with multiple sounding reference signal (SRS) resource sets for antenna switching by the UE. The method also includes transmitting one or more SRS, by the In to the base station, according to the configuration of the multiple SRS resource sets. ## Claims ### Claim 1 A method of wireless communication, comprising: transmitting a configuration message, by a base station to a user equipment (UE), that configures the UE, according to one or more antenna switching constraints, with multiple sounding reference signal (SRS) resource sets for antenna switching by the UE; and receiving one or more SRS, by the base station, transmitted by the UE according to the configuration of the multiple SRS resource sets. ### Claim 2 (depends on 1) The method of claim 1, further comprising: receiving, by the base station from the UE, a capability message indicating the antenna switching constraints. ### Claim 3 (depends on 1) The method of claim 1, wherein the one or more antenna switching constraints include at least one antenna switching constraint selected from the group consisting of: the UE will not be configured with multiple SRS resource sets for antenna switching unless all are of a same antenna switching type; the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot; the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information; or combinations thereof. ### Claim 4 (depends on 3) The method of claim 3, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with multiple SRS resource sets for antenna switching unless all of the SRS resource sets are of a same antenna switching type. ### Claim 5 (depends on 4) The method of claim 4, wherein the multiple SRS resource sets configured to the UE have different timing behavior. ### Claim 6 (depends on 4) The method of claim 4, wherein the same antenna switching type is selected from the group consisting of: a type of SRS resource set (1T2R) having two SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of a second resource of the two SRS resources is associated with a different UE antenna port than another SRS port of a first resource of the two SRS resources; a type of SRS resource set (2T4R) having two SRS resources transmitted in different symbols, each SRS resource consisting of two SRS ports, wherein an SRS port pair of a second resource of the two SRS resources is associated with a different UE antenna port pair than another SRS port pair of a first resource of the two SRS resources; a type of SRS resource set (periodic or semi-persistent 1T4R) configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein are SRS port of each resource is associated with a different UE antenna port; a type of SRS resource set (A-1T4R) in which two SRS resource sets are configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘aperiodic,’ with a total of four SRS resources transmitted in different symbols of two different slots, wherein: an SRS port of each SRS resource is associated with a different UE antenna port, and at least one of: the two SRS resource sets are each configured with two SRS resources, or one set is configured with one SRS resource and another set is configured with three SRS resources; or a type of SRS resource set (T=R) having one SRS resource, wherein a number of SRS ports is equal to 1, 2, or 4. ### Claim 7 (depends on 3) The method of claim 3, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot. ### Claim 8 (depends on 3) The method of claim 3, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information. ### Claim 9 (depends on 8) The method of claim 8, wherein the same antenna switching type is a type of SRS resource set configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different LIE antenna port. ### Claim 10 A method of wireless communication, comprising: receiving a configuration message, by a user equipment (UE) from a base station, that configures the UE, according to one or more antenna switching constraints, with multiple sounding reference signal (SRS) resource sets for antenna switching by the UE; and transmitting one or more SRS, by the UE to the base station, according to the configuration of the multiple SRS resource sets. ### Claim 11 (depends on 10) The method of claim 10, further comprising: transmitting, by the UE to the base station, a capability message indicating the antenna switching constraints. ### Claim 12 (depends on 10) The method of claim 10, wherein the one or more antenna switching constraints include at least one antenna switching constraint selected from the group consisting of: the UE will not be configured with multiple SRS resource sets for antenna switching unless all are of a same antenna switching type; the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot; the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information; or combinations thereof. ### Claim 13 (depends on 12) The method of claim 12, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with multiple SRS resource sets for antenna switching unless all of the SRS resource sets are of a same antenna switching type. ### Claim 14 (depends on 13) The method of claim 13, wherein the multiple SRS resource sets configured to the UE have different timing behavior. ### Claim 15 (depends on 13) The method of claim 13, wherein the same antenna switching type is selected from the group consisting of: a type of SRS resource set (1T2R) having two SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of a second resource of the two SRS resources is associated with a different UE antenna port than another SRS port of a first resource of the two SRS resources; a type of SRS resource set (2T4R) haying two SRS resources transmitted in different symbols, each SRS resource consisting of two SRS ports, wherein an SRS port pair of a second resource of the two SRS resources is associated with a different UE antenna port pair than another SRS port pair of a first resource of the two SRS resources; a type of SRS resource set (periodic or semi-persistent 1T4R) configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port; a type of SRS resource set (A-1T4R) in which two SRS resource sets are configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘aperiodic’ with a total of four SRS resources transmitted in different symbols of two different slots, wherein; an SRS port of each SRS resource is associated with a different UE antenna port, and at least one of: the two SRS resource sets are each configured with two SRS resources, or one set is configured with one SRS resource and another set is configured with three SRS resources, or a type of SRS resource set (T=R) having one SRS resource, wherein a number of SRS ports is equal to 1, 2, or 4. ### Claim 16 (depends on 12) The method of claim 12, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot. ### Claim 17 (depends on 12) The method of claim 12, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information. ### Claim 18 (depends on 17) The method of claim 17, wherein the same antenna switching type is a type of SRS resource set configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port. ### Claim 19 An apparatus for wireless communication, comprising: means for transmitting a configuration message, by a base station to a user equipment (UE), that configures the UE, according to one or more antenna switching constraints, with multiple sounding reference signal (SRS) resource sets for antenna switching by the UE; and means for receiving one or more SRS, by the base station, transmitted by the UE according to the configuration of the multiple SRS resource sets. ### Claim 20 (depends on 19) The apparatus of claim 19, further comprising: means for receiving, by the base station from the LIE, a capability message indicating the antenna switching constraints. ### Claim 21 (depends on 19) The apparatus of claim 19, wherein the one or more antenna switching constraints include at least one antenna switching constraint selected from the group consisting of: the UE will not be configured with multiple SRS resource sets for antenna switching unless all are of a same antenna switching type; the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot; the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information; or combinations thereof. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with multiple SRS resource sets for antenna switching unless all of the SRS resource sets are of a same antenna switching type. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the multiple SRS resource sets configured to the UE have different timing behavior. ### Claim 24 (depends on 22) The apparatus of claim 22, wherein the same antenna switching type is selected from the group consisting of: a type of SRS resource set (1T2R) having two SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of a second resource of the two SRS resources is associated with a different UE antenna port than another SRS port of a first resource of the two SRS resources; a type of SRS resource set (2T4R) having two SRS resources transmitted in different symbols, each SRS resource consisting of two SRS ports, wherein an SRS port pair of a second resource of the two SRS resources is associated with a different UE antenna port pair than another SRS port pair of a first resource of the two SRS resources; a type of SRS resource set (periodic or semi-persistent 1T4R) configured with a higher layer parameter resourceType ire SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port; a type of SRS resource set (A-1T4R) in which two SRS resource sets are configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘aperiodic’ with a total of four SRS resources transmitted in different symbols of two different slots, wherein: an SRS port of each SRS resource is associated with a different UE antenna port, and at least one of: the two SRS resource sets are each configured with two SRS resources, or one set is configured with one SRS resource and another set is configured with three SRS resources; or a type of SRS resource set (T=R) having one SRS resource, wherein a number of SRS ports is equal to 1, 2, or 4. ### Claim 25 (depends on 21) The apparatus of claim 21, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same ### Claim 26 (depends on 21) The apparatus of claim 21, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information. ### Claim 27 (depends on 26) The apparatus of claim 26, wherein the same antenna switching type is a type of SRS resource set configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port. ### Claim 28 An apparatus for wireless communication, comprising: means for receiving a configuration message, by a user equipment (UE) from a base station, that configures the UE, according to one or more antenna switching constraints, with multiple sounding reference signal (SRS) resource sets for antenna switching by the UE; and means for transmitting one or more SRS, by the UE to the base station, according to the configuration of the multiple SRS resource sets. ### Claim 29 (depends on 2) The apparatus of claim 2$, further comprising: means for transmitting, by the UE to the base station, a capability message indicating the antenna switching constraints. ### Claim 30 (depends on 28) The apparatus of claim 28, wherein the one or more antenna switching constraints include at least one antenna switching constraint selected from the group consisting of: the UE will not be configured with multiple SRS resource sets for antenna switching unless all are of a same antenna switching type; the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot; the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information; or combinations thereof. ### Claim 31 (depends on 30) The apparatus of claim 30, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with multiple SRS resource sets for antenna switching unless all of the SRS resource sets are of a same antenna switching type. ### Claim 32 (depends on 31) The apparatus of claim 31, wherein the multiple SRS resource sets configured to the UE have different timing behavior, ### Claim 33 (depends on 31) The apparatus of claim 31, wherein the same antenna switching type is selected from the group consisting of: a type of SRS resource set (1T2R) having two SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of a second resource of the two SRS resources is associated with a different UE antenna port than another SRS port of a first resource of the two SRS resources; a type of SRS resource set (2T4R) having two SRS resources transmitted in different symbols, each SRS resource consisting of two SRS ports, wherein an SRS port pair of a second resource of the two SRS resources is associated with a different UE antenna port pair than another SRS port pair of a first resource of the two SRS resources; a type of SRS resource set (periodic or semi-persistent 1T4R) configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port; a type of SRS resource set (A-1T4R) in which two SRS resource sets are configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘aperiodic’ with a total of four SRS resources transmitted in different symbols of two different slots, wherein: an SRS port of each SRS resource is associated with a different UE antenna port, and at least one of: the two SRS resource sets are each configured with two SRS resources, or one set is configured with one SRS resource and another set is configured with three SRS resources, or a type of SRS resource set (T=R) having one SRS resource, wherein a number of SRS ports is equal to 1, 2, or 4. ### Claim 34 (depends on 30) The apparatus of claim 30, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot. ### Claim 35 (depends on 30) The apparatus of claim 30, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information. ### Claim 36 (depends on 35) The apparatus of claim 35, wherein the same antenna switching type is a type of SRS resource set configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port. ### Claim 37 An apparatus for wireless communication, comprising: at least one computer processor; and at least one memory coupled to the at least one computer processor, wherein the at least one computer processor is configured to: transmit a configuration message, by a base station to a user equipment (UE), that configures the UE, according to one or more antenna switching constraints, with multiple sounding reference signal (SRS) resource sets for antenna switching by the UE; and receive one or more SRS, by the base station, transmitted by the UE, according to the configuration of the multiple SRS resource sets. ### Claim 38 (depends on 37) The apparatus of claim 37, wherein the at least one computer processor is further configured to: receive, by the base station from the UE, a capability message indicating the antenna switching constraints. ### Claim 39 (depends on 37) The apparatus of claim 37, Wherein the one or more antenna switching constraints include at least one antenna switching constraint selected from the group consisting of: the UE will not be configured with multiple SRS resource sets for antenna switching unless all are of a same antenna switching type; the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot; the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information; or combinations thereof. ### Claim 40 (depends on 39) The apparatus of claim 39, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with multiple SRS resource sets for antenna switching unless all of the SRS resource sets are of a same antenna switching type. ### Claim 41 (depends on 40) The apparatus of claim 40, wherein the multiple SRS resource sets configured to the UE have different timing behavior. ### Claim 42 (depends on 40) The apparatus of claim 40, wherein the same antenna switching type is selected from the group consisting of: a type of SRS resource set (1T2R) having two SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of a second resource of the two SRS resources is associated with a different UE antenna port than another SRS port of a first resource of the two SRS resources; a type of SRS resource set (2T4R) having two SRS resources transmitted in different symbols, each SRS resource consisting of two SRS ports, wherein an SRS port pair of a second resource of the two SRS resources is associated with a different UE antenna port pair than another SRS port pair of a first resource of the two SRS resources; a type of SRS resource set (periodic or semi-persistent 1T4R) configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each. SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port; a type of SRS resource set (A-1T4R) in which two SRS resource sets are configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘aperiodic’ with a total of four SRS resources transmitted in different symbols of two different slots, wherein: an SRS port of each SRS resource is associated with a different UE antenna port, and at least one of: the two SRS resource sets are each configured with two SRS resources, or one set is configured with one SRS resource and another set is configured with three SRS resources; or a type of SRS resource set (T=R) having one SRS resource, wherein a number of SRS ports is equal to 1, 2, or 4. ### Claim 43 (depends on 39) The apparatus of claim 39, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot. ### Claim 44 (depends on 39) The apparatus of claim 39, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information. ### Claim 45 (depends on 44) The apparatus of claim 44, wherein the same antenna switching type is a type SRS resource set configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port. ### Claim 46 An apparatus for wireless communication, comprising: at least one computer processor; and at least one memory coupled to the at least one computer processor, wherein the at least one computer processor is configured to: receive a configuration message, by a user equipment (UE) from a base station, that configures the UE, according to one or more antenna switching constraints, with multiple sounding reference signal (SRS) resource sets for antenna switching by the UE; and transmit one or more SRS, by the UE to the base station, according to the configuration of the multiple SRS resource sets. ### Claim 47 (depends on 46) The apparatus of claim 46, wherein the at least one computer processor s further configured to: transmit, by the UE to the base station, a capability message indicating the antenna switching constraints. ### Claim 48 (depends on 46) The apparatus of claim 46, wherein the one or more antenna switching constraints include at least one antenna switching constraint selected from the group consisting of: the UE will not be configured with multiple SRS resource sets for antenna switching unless all are of a same antenna switching type; the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot; the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information; or combinations thereof. ### Claim 49 (depends on 48) The apparatus of claim 48, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with multiple SRS resource sets for antenna switching unless all of the SRS resource sets are of a same antenna switching type. ### Claim 50 (depends on 49) The apparatus of claim 49, wherein the multiple SRS resource sets configured to the UE have different timing behavior. ### Claim 51 (depends on 49) The apparatus of claim 49, wherein the same antenna switching type is selected from the group consisting of: a type of SRS resource set (1T2R) having two SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of a second resource of the two SRS resources is associated with a different UE antenna port than another SRS port of a first resource of the two SRS resources; a type of SRS resource set (2T4R) having two SRS resources transmitted in different symbols, each SRS resource consisting of two SRS ports, wherein an SRS port pair of a second resource of the two SRS resources is associated with a different UE antenna port pair than another SRS port pair of a first resource of the two SRS resources; a type of SRS resource set (periodic or semi-persistent 1T4R) configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port; a type of SRS resource set (A-1T4R) in which two SRS resource sets are configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘aperiodic’ with a total of four SRS resources transmitted in different symbols of two different slots, wherein: an SRS port of each SRS resource is associated with a different UE antenna port, and at least one of: the two SRS resource sets are each configured with two SRS resources, or one set is configured with one SRS resource and another set is configured with three SRS resources, or a type of SRS resource set (T=R) having one SRS resource, wherein a number of SRS ports is equal to 1, 2, or 4. ### Claim 52 (depends on 48) The apparatus of claim 48, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot. ### Claim 53 (depends on 48) The apparatus of claim 48, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information. ### Claim 54 (depends on 53) The apparatus of claim 53, wherein the same antenna switching type is a type of SRS resource set configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port. ### Claim 55 A non-transitory computer-readable medium having instructions recorded thereon that, when enacted by one or more computer processors, cause the one or more computer processors to: transmit a configuration message, by a base station to a user equipment (UE), that configures the UE, according to one or more antenna switching constraints, with multiple sounding reference signal (SRS) resource sets for antenna switching by the UE; and receive one or more SRS, by the base station, transmitted by the UE according to the configuration of the multiple SRS resource sets. ### Claim 56 (depends on 55) The non-transitory computer-readable medium of claim 55, wherein the instructions further cause the one or more computer processor to: receive, by the base station from the UE, a capability message indicating the antenna switching constraints. ### Claim 57 (depends on 55) The non-transitory computer-readable medium of claim 55, wherein the one or more antenna switching constraints include at least one antenna switching constraint selected from the group consisting of: the UE will not be configured with multiple SRS resource sets for antenna switching unless all are of a same antenna switching type; the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot; the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information; or combinations thereof. ### Claim 58 (depends on 57) The non-transitory computer-readable medium of claim 57, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with multiple SRS resource sets for antenna switching unless all of the SRS resource sets are of a same antenna switching type. ### Claim 59 (depends on 58) The non-transitory computer-readable medium of claim 58, wherein the multiple SRS resource sets configured to the UE have different timing behavior. ### Claim 60 (depends on 58) The non-transitory computer-readable medium of claim 58, wherein the same antenna switching type is selected from the group consisting of: a type of SRS resource set (1T2R) having two SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of a second resource of the two SRS resources is associated with a different UE antenna port than another SRS port of a first resource of the two SRS resources; a type of SRS resource set (2T4R) having two SRS resources transmitted in different symbols, each SRS resource consisting of two SRS ports, wherein an SRS port pair of a second resource of the two SRS resources is associated with a different UE antenna port pair than another SRS port pair of a first resource of the two SRS resources; a type of SRS resource set (periodic or semi-persistent 1T4R) configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port; a type of SRS resource set (A-1T4R) in which two SRS resource sets are configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘aperiodic’ with a total of four SRS resources transmitted in different symbols of two different slots, wherein: an SRS port of each SRS resource is associated with a different UE antenna port, and at least one of: the two SRS resource sets are each configured with two SRS resources, or one set is configured with one SRS resource and another set is configured with three SRS resources; or a type of SRS resource set (T=R) having one SRS resource, wherein a number of SRS ports is equal to 1, 2, or 4. ### Claim 61 (depends on 57) The non-transitory computer-readable medium of claim 57, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot. ### Claim 62 (depends on 57) The non-transitory computer-readable medium of claim 57, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information. ### Claim 63 (depends on 62) The non-transitory computer-readable medium of claim 62, wherein the same antenna switching type is a type of SRS resource set configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port. ### Claim 64 A non-transitory computer-readable medium having instructions recorded thereon that, when enacted by one or more computer processors, cause the one or more computer processors to: receive a configuration message, by a user equipment (UE) from a base station, that configures the UE, according to one or more antenna switching constraints, with multiple sounding reference signal (SRS) resource sets for antenna switching by the UE; and transmit one or more SRS, by the UE to the base station, according to the configuration of the multiple SRS resource sets. ### Claim 65 (depends on 64) The non-transitory computer-readable medium of claim 64, wherein the instructions further cause the one or more computer processors to: transmit, by the UE to the base station, a capability message indicating the antenna switching constraints. ### Claim 66 (depends on 64) The non-transitory computer-readable medium of claim 64, wherein the one or more antenna switching constraints include at least one antenna switching constraint selected from the group consisting of: the UE will not be configured with multiple SRS resource sets for antenna switching unless all are of a same antenna switching type; the UE will not be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot; the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information; or combinations thereof. ### Claim 67 (depends on 66) The non-transitory computer-readable medium of claim 66, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with multiple SRS resource sets for antenna switching unless all of the SRS resource sets are of a same antenna switching type. ### Claim 68 (depends on 67) The non-transitory computer-readable medium of claim 67, wherein the multiple SRS resource sets configured to the UE have different timing behavior. ### Claim 69 (depends on 67) The non-transitory computer-readable medium of claim 67, wherein the same antenna switching type is selected from the group consisting of: a type of SRS resource set (1T2R) haying two SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of a second resource of the two SRS resources is associated with a different UE antenna port than another SRS port of a first resource of the two SRS resources; a type of SRS resource set (2T4R) having two SRS resources transmitted in different symbols, each SRS resource consisting of two SRS ports, wherein an SRS port pair of a second resource of the two SRS resources is associated with a different UE antenna port pair than another SRS port pair of a first resource of the two SRS resources; a type of SRS resource set (periodic or semi-persistent 1T4R) configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port; a type of SRS resource set (A-1T4R) in which two SRS resource sets are configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘aperiodic’ with a total of four SRS resources transmitted in different symbols of two different slots, wherein: an SRS port of each SRS resource is associated with a different UE antenna port, and at least one of: the two SRS resource sets are each configured with two SRS resources, or one set is configured with one SRS resource and another set is configured with three SRS resources, or a type of SRS resource set (T=R) having one SRS resource, wherein a number of SRS ports is equal to 1, 2, or 4. ### Claim 70 (depends on 66) The non-transitory computer-readable medium of claim 66, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will riot be configured to transmit SRS resources from multiple SRS resource sets for antenna switching on a same slot. ### Claim 71 (depends on 66) The non-transitory computer-readable medium of claim 66, wherein the at least one antenna switching constraint includes the antenna switching constraint that the UE will not be configured with two or more periodic or semi-persistent SRS resource sets for antenna switching of a same antenna switching type unless the two or more periodic or semi-persistent SRS resource sets have different spatial reception information. ### Claim 72 (depends on 71) The non-transitory computer-readable medium of claim 71, wherein the same antenna switching type is a type of SRS resource set configured with a higher layer parameter resourceType in SRS-ResourceSet set to ‘periodic’ or ‘semi-persistent’ with four SRS resources transmitted in different symbols, each SRS resource consisting of a single SRS port, wherein an SRS port of each resource is associated with a different UE antenna port.