Methods and apparatus for sounding and control signaling enhancements
In an embodiment, a user equipment (UE) receives, from an access node (AN), downlink control information (DCI) triggering a transmission of a sounding reference signal (SRS) of a SRS resource set. The DCI indicates a time-domain resource in available time-domain resources for transmitting the SRS resource set. The UE determines a position of the time-domain resource in the available time-domain resources based on the DCI, and transmits the SRS in accordance with the position of the time-domain resource. In another embodiment, a UE receives control information indicating a frequency resource in a carrier for transmission of one or more SRSs. The UE determines, based thereon, to segment the frequency resource into segments that each includes contiguous physical resource blocks (PRBs), and transmits a SRS in an orthogonal frequency division multiplexing (OFDM) symbol on a first segment and not on a second segment.
1 . A method comprising:
receiving, by a user equipment (UE) from an access node (AN), higher layer signaling including a configuration;
receiving, by the UE from the AN, downlink control information (DCI) in a first slot, the DCI triggering a transmission of a sounding reference signal (SRS) of an aperiodic SRS resource set, the DCI comprising first information indicating a first time-domain resource in a pool of available time-domain resources for transmitting the SRS, the pool of available time-domain resources being based on the configuration and the first slot in which the DCI is received;
determining, by the UE, the first time-domain resource in the pool of available time-domain resources based on the first information of the DCI; and
transmitting, by the UE to the AN, the SRS in accordance with the first time-domain resource.
2 . The method of claim 1 , wherein:
the configuration includes a higher layer parameter slotoffset, and the determining the first time-domain resource comprises:
determining, by the UE, the pool of available time-domain resources according to the first slot of the DCI and the higher layer parameter slotoffset.
3 . The method of claim 2 , further comprising:
determining, by the UE, a reference slot for the pool of available time-domain resources based on the first slot and the higher layer parameter slotoffset, wherein the reference slot is at a position that is k slots after the first slot, k is configured by the higher layer parameter slotoffset, and k is greater than or equal to zero (0).
4 . The method of claim 3 , wherein the pool of available time-domain resources comprises time-domain resources that are in or after, in a time domain, the reference slot, and that are configured as uplink (UL) or flexible, and wherein the time-domain resources are in a unit of a slot, a mini-slot, or an orthogonal frequency division multiplexing (OFDM) symbol.
5 . The method of claim 1 , wherein the pool of available time-domain resources comprises time-domain resources that are in or after, in a time domain, the first slot, and that are configured as uplink (UL) or flexible, and the time-domain resources are in a unit of a slot, a mini-slot, or an orthogonal frequency division multiplexing (OFDM) symbol.
6 . The method of claim 1 , wherein the DCI comprises a slot index of the first time-domain resource in the pool of available time-domain resources.
7 . A method comprising:
transmitting, by an access node (AN) to a user equipment (UE), higher layer signaling including a configuration;
transmitting, by the AN to the UE, downlink control information (DCI) in a first slot, the DCI triggering a transmission of a sounding reference signal (SRS) of an aperiodic SRS resource set, wherein:
the DCI comprises information indicating a first time-domain resource from a pool of available time-domain resources for transmitting the SRS, and
the pool of available time-domain resources corresponds to the configuration and the first slot in which the DCI is transmitted; and
receiving, by the AN from the UE, the SRS based on the first time-domain resource.
8 . The method of claim 7 , wherein the pool of available time-domain resources corresponds to a position of the first slot of the DCI and a higher layer parameter slotoffset, and the configuration includes the higher layer parameter slotoffset.
9 . The method of claim 8 , wherein the pool of available time-domain resources corresponds to a reference slot, the reference slot is at a position that is k slots after the first slot, and k is specified by the higher layer parameter slotoffset that is configured for the UE, and k is greater than or equal to zero (0).
10 . The method of claim 9 , wherein the pool of available time-domain resources comprises time-domain resources that are in or after, in a time domain, the reference slot, and that are configured as uplink (UL) or flexible, and wherein the time-domain resources are in a unit of a slot, a mini-slot, or an OFDM symbol.
11 . The method of claim 7 , wherein the pool of available time-domain resources comprises time-domain resources that are in or after, in a time domain, the first slot, and that are configured as uplink (UL) or flexible, and the time-domain resources are in a unit of a slot, a mini-slot, or an orthogonal frequency division multiplexing (OFDM) symbol.
12 . The method of claim 7 , wherein the DCI comprises a slot index of the first time-domain resource in the pool of available time-domain resources.
13 . An apparatus comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the non-transitory memory storage, wherein the instructions, when executed by the one or more processors, cause the apparatus to perform:
receiving, from an access node (AN), higher layer signaling including a configuration;
receiving, from the AN, downlink control information (DCI) in a first slot, the DCI triggering a transmission of a sounding reference signal (SRS) of an aperiodic SRS resource set, the DCI comprising first information indicating a first time-domain resource in a pool of available time-domain resources for transmitting the SRS, the pool of available time-domain resources being based on the configuration and the first slot in which the DCI is received;
determining the first time-domain resource in the pool of available time-domain resources based on the first information of the DCI; and
transmitting, to the AN, the SRS in accordance with the first time-domain resource.
14 . The apparatus of claim 13 , wherein the configuration includes a higher layer parameter slotoffset; and
the determining the first time-domain resource comprises:
determining the pool of available time-domain resources according to the first slot of the DCI and the higher layer parameter slotoffset.
15 . The apparatus of claim 14 , wherein the determining the pool of available time-domain resources according to the first slot and the higher layer parameter slotoffset comprises:
determining a reference slot for the pool of available time-domain resources based on the first slot and the higher layer parameter slotoffset, wherein the reference slot is at a position that is k slots after the first slot, k is configured by the higher layer parameter slotoffset, and k is greater than or equal to zero (0).
16 . The apparatus of claim 15 , wherein the pool of available time-domain resources comprises time-domain resources that are in or after, in a time domain, the reference slot, and that are configured as uplink (UL) or flexible, and wherein the time-domain resources are in a unit of a slot, a mini-slot, or an orthogonal frequency division multiplexing (OFDM) symbol.
17 . The apparatus of claim 13 , wherein the pool of available time-domain resources comprises time-domain resources that are in or after, in a time domain, the first slot, and that are configured as uplink (UL) or flexible, and the time-domain resources are in a unit of a slot, a mini-slot, or an orthogonal frequency division multiplexing (OFDM) symbol.
18 . The apparatus of claim 13 , wherein the DCI comprises a slot index of the first time-domain resource in the pool of available time-domain resources.
19 . An apparatus comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the non-transitory memory storage, wherein the instructions, when executed by the one or more processors, cause the apparatus to perform:
transmitting, to a user equipment (UE), higher layer signaling including a configuration;
transmitting, to the UE, downlink control information (DCI) in a first slot, the DCI triggering a transmission of a sounding reference signal (SRS) of an aperiodic SRS resource set, wherein:
the DCI comprises information indicating a first time-domain resource from a pool of available time-domain resources for transmitting the SRS resource set, and
the pool of available time-domain resources corresponds to the configuration and the first slot in which the DCI is transmitted; and
receiving, from the UE, the SRS based on the first time-domain resource.
20 . The apparatus of claim 19 , wherein the pool of available time-domain resources corresponds to a position of the first slot of the DCI and a higher layer parameter slotoffset, and the configuration includes the higher layer parameter slotoffset.