Sensing in wireless communications system
Resources are configured, by frame/subframe/slot/symbol, for uplink communication components, downlink communication components, radar sensing components, or flexible components. Flexible components are configured by symbol for uplink or downlink communications, radar sensing, or flexible usage. Full, partial or no overlap between resources for uplink, downlink or sidelink communication and resources for radar sensing may be configured. Frequency configuration for radar sensing may be in absolute units or grid units, and waveforms other than OFDM may be used for radar sensing. Configuration may be initiated by a base station in response to explicit or implicit request by a UE for sensing resources. A UE may sense resources within a configured resource pool for availability before using the resources for radar sensing.
1. A method performed by a user equipment (UE), the method comprising:
transmitting a request for allocation of radar sensing resources;
receiving:
first information related to a time resource for downlink (DL) communication, uplink (UL) communication, or radar sensing, wherein:
the first information indicates a time pattern for a set of subcarriers and symbols, the time pattern including:
one or more UL components for UL communications,
one or more DL components for DL communications,
one or more radar sensing components, and
one or more flexible components that may be used for UL or DL communications or radar sensing; and
the time pattern comprises one or more time slots or one or more symbols;
second information related to a frequency resource for DL and UL communication or radar sensing; and
third information related to a sequence for a radar sensing signal waveform;
determining, based on the first and the second information, a radar sensing measurement report; and
transmitting a channel with the radar sensing measurement report.
2. The method of claim 1 , wherein:
the second information indicates an allocation of frequencies,
at least some of frequency resources allocated for radar sensing are different from frequencies for UL or DL communications, and
others of the frequency resources allocated for radar sensing overlap with frequency resources allocated for UL or DL communications with one of a full overlap, a partial overlap, or no overlap.
3. The method of claim 1 , wherein:
the request for allocation of radar sensing resources is an explicit sensing request for one or more of a sensing time, a sensing frequency allocation, or a sensing sequence length, or
an implicit sensing request indicated by one of a sensing activity state or a sensing category type linked to a configuration for sensing resources.
4. The method of claim 1 , wherein the request for allocation of radar sensing resources is an implicit sensing request indicated by one of a sensing activity state or a sensing category type linked to a configuration for sensing resources and wherein the implicit sensing request comprises one of:
active radar sensing by the user equipment,
inactive, idle, or stand-by sensing by the user equipment, or
execution by the UE of a sensing application having requirements for one or more of:
a target sensing range, a maximum sensing range, or a minimum sensing range,
a target sensing resolution, a maximum sensing resolution, or a minimum sensing resolution,
a target sensing accuracy or a maximum sensing accuracy, or
a target sensing transmission power.
5. The method of claim 1 , wherein the request for allocation of radar sensing resources is included in one of:
a physical random access channel (PRACH) transmission with a dedicated preamble,
a PRACH transmission in a dedicated random access channel (RACH) occasion,
a physical uplink control channel (PUCCH) transmission with uplink control information (UCI) having a type corresponding to a sensing request,
the UCI transmitted on a dynamic physical uplink shared channel (PUSCH),
the UCI transmitted as a configured grant UCI (CG-UCI) on a configured grant PUSCH (CG-PUSCH), or
a request field in a UCI corresponding to the sensing request.
6. The method of claim 1 , further comprising:
receiving an indication of a configuration a resource pool for radar sensing in time or frequency resources;
determining available resources in the configured resource pool before performing radar sensing using the resources, wherein availability of resources in the configured resource pool is determined based on one of energy detection or signal detection; and
performing radar sensing using the resources only upon determining that the resources are available for radar sensing.
7. A user equipment (UE), comprising:
a transceiver configured to:
transmit a request for allocation of radar sensing resources;
receive first information related to a time resource for downlink (DL) communication, uplink (UL) communication, or radar sensing, wherein:
the first information indicates a time pattern for a set of subcarriers and symbols, the time pattern including:
one or more UL components for UL communications,
one or more DL components for DL communications,
one or more radar sensing components, and
one or more flexible components that may be used for UL or DL communications or radar sensing; and
the time pattern comprises one or more time slots or one or more symbols;
receive second information related to a frequency resource for DL and UL communication or radar sensing; and
receive third information related to a sequence for a radar sensing signal waveform; and
a processor operably coupled to the transceiver, the processor configured to determine, based on the first and the second information, a radar sensing measurement report,
wherein the transceiver is further configured to transmit a channel with the radar sensing measurement report.
8. The UE of claim 7 , wherein:
the second information indicates an allocation of frequencies,
at least some of frequency resources allocated for radar sensing are different from frequencies for UL or DL communications, and
others of the frequency resources allocated for radar sensing overlap with frequency resources allocated for UL or DL communications with one of a full overlap, a partial overlap, or no overlap.
9. The UE of claim 7 , wherein:
the request for allocation of radar sensing resources is an explicit sensing request for one or more of a sensing time, a sensing frequency allocation, or a sensing sequence length, or
an implicit sensing request indicated by one of a sensing activity state or a sensing category type linked to a configuration for sensing resources.
10. The UE of claim 7 , wherein the request for allocation of radar sensing resources is an implicit sensing request indicated by one of a sensing activity state or a sensing category type linked to a configuration for sensing resources and wherein the implicit sensing request comprises one of:
active radar sensing by the user equipment,
inactive, idle, or stand-by sensing by the user equipment, or
execution by the UE of a sensing application having requirements for one or more of:
a target sensing range, a maximum sensing range, or a minimum sensing range,
a target sensing resolution, a maximum sensing resolution, or a minimum sensing resolution,
a target sensing accuracy or a maximum sensing accuracy, or
a target sensing transmission power.
11. The UE of claim 7 , wherein the request for allocation of radar sensing resources is included in one of:
a physical random access channel (PRACH) transmission with a dedicated preamble,
a PRACH transmission in a dedicated random access channel (RACH) occasion,
a physical uplink control channel (PUCCH) transmission with uplink control information (UCI) having a type corresponding to a sensing request,
the UCI transmitted on a dynamic physical uplink shared channel (PUSCH),
the UCI transmitted as a configured grant UCI (CG-UCI) on a configured grant PUSCH (CG-PUSCH), or
a request field in a UCI corresponding to the sensing request.
12. The UE of claim 7 , wherein:
the transceiver is further configured to receive an indication of a configuration a resource pool for radar sensing in time or frequency resources; and
the processor is further configured to:
determine available resources in the configured resource pool before performing radar sensing using the resources, wherein availability of resources in the configured resource pool is determined based on one of energy detection or signal detection; and
performing radar sensing using the resources only upon determining that the resources are available for radar sensing.
13. A base station (BS), comprising:
a processor; and
a transceiver operably coupled to the processor, the transceiver configured to:
receive, from a user equipment (UE), a request for allocation of radar sensing resources;
transmit first information related to a time resource for downlink (DL) communication, uplink (UL) communication, or radar sensing, wherein:
the first information indicates a time pattern for a set of subcarriers and symbols, the time pattern including:
one or more UL components for UL communications,
one or more DL components for DL communications,
one or more radar sensing components, and
one or more flexible components that may be used for UL or DL communications or radar sensing; and
the time pattern comprises one or more time slots or one or more symbols;
transmit second information related to a frequency resource for DL and UL communication or radar sensing;
transmit third information related to a sequence for a radar sensing signal waveform; and
receive, from the UE, a channel with a radar sensing measurement report associated with the first and the second information.
14. The BS of claim 13 , wherein:
the second information indicates an allocation of frequencies,
at least some of frequency resources allocated for radar sensing are different from frequencies for UL or DL communications, and
others of the frequency resources allocated for radar sensing overlap with frequency resources allocated for UL or DL communications with one of a full overlap, a partial overlap, or no overlap.
15. The BS of claim 13 , wherein:
the request for allocation of radar sensing resources is an explicit sensing request for one or more of a sensing time, a sensing frequency allocation, or a sensing sequence length, or
an implicit sensing request indicated by one of a sensing activity state or a sensing category type linked to a configuration for sensing resources.
16. The BS of claim 13 , wherein the request for allocation of radar sensing resources is an implicit sensing request indicated by one of a sensing activity state or a sensing category type linked to a configuration for sensing resources and wherein the implicit sensing request comprises one of:
active radar sensing by the user equipment,
inactive, idle, or stand-by sensing by the user equipment, or
execution by the UE of a sensing application having requirements for one or more of:
a target sensing range, a maximum sensing range, or a minimum sensing range,
a target sensing resolution, a maximum sensing resolution, or a minimum sensing resolution,
a target sensing accuracy or a maximum sensing accuracy, or
a target sensing transmission power.
17. The BS of claim 13 , wherein the request for allocation of radar sensing resources is received in one of:
a physical random access channel (PRACH) with a dedicated preamble,
a PRACH in a dedicated random access channel (RACH) occasion,
a physical uplink control channel (PUCCH) with uplink control information (UCI) having a type corresponding to a sensing request,
the UCI on a dynamic physical uplink shared channel (PUSCH),
the UCI as a configured grant UCI (CG-UCI) on a configured grant PUSCH (CG-PUSCH), or
a request field in a UCI corresponding to the sensing request.