Sounding reference signal configuration for new radio positioning
Aspects of the present application provide methods and devices in a communication network that aid in implementing sounding reference signal (SRS) measurement by multiple cells (i.e. serving cells and non-serving cells, also known as “neighbor cells”) as well as NR LMUs.
1. A method comprising:
receiving a first message from a network device in a serving cell, wherein the first message indicates a configuration of at least one configured bandwidth (BW) dedicated for sounding reference signal (SRS) transmission used for determining a position of a user equipment (UE);
sending the SRS transmission on the at least one configured BW to at least one of the network device in the serving cell and a network device in a neighboring cell;
wherein the at least one configured BW comprises an active bandwidth part (BWP) or a positioning BW.
2. The method of claim 1 , the method further comprising:
receiving a second message from the network device in the serving cell, wherein the second message indicates a deactivation command for the at least one configured BW.
3. The method of claim 2 , wherein the second message is an explicit indication to deactivate the SRS or an implicit indication to deactivate the SRS, wherein the implicit indication comprises at least one of:
a location information;
a location information acknowledgement;
an activation command for SRS in a new configured BW;
a delay period; and
expiration of a timer.
4. The method of claim 3 further comprising receiving an indication of the delay period in:
a radio resource control (RRC) message; or
a downlink control information (DCI).
5. The method of claim 1 , the method further comprising SRS activation in a different configured BW when the UE receives an implicit indication to deactivate the SRS or an explicit deactivation command for the SRS in the at least one configured BW.
6. An apparatus comprising:
a processor; and
a computer-readable medium having stored thereon instructions that when executed by the processor cause the apparatus to:
receive a first message from a network device in a serving cell, wherein the first message indicates a configuration of at least one configured bandwidth (BW) dedicated for sounding reference signal (SRS) transmission used for determining a position of the apparatus;
send the SRS transmission on the at least one configured BW to at least one of the network device in the serving cell and a network device in a neighboring cell;
wherein the at least one configured BW comprises an active bandwidth part (BWP) or a positioning BW.
7. The apparatus of claim 6 , further comprising instructions that when executed by the processor cause the apparatus to:
receive a second message from the network device in the serving cell, wherein the second message indicates a deactivation command for the at least one configured BW.
8. The apparatus of claim 7 , wherein the second message is an explicit indication to deactivate the SRS or an implicit indication to deactivate the SRS, wherein the implicit indication comprises at least one of:
a location information;
a location information acknowledgement;
an activation command for SRS in a new configured BW;
a delay period; and
expiration of a timer.
9. The apparatus of claim 8 further comprising instructions that when executed by the processor cause the apparatus to receive an indication of the delay period in:
a radio resource control (RRC) message; or
a downlink control information (DCI).
10. The apparatus of claim 6 , further comprising instructions that when executed by the processor cause the apparatus to perform SRS activation in a different configured BW when the apparatus receives an implicit indication to deactivate the SRS or an explicit deactivation command for the SRS in the at least one configured BW.
11. A method comprising:
transmitting, by a network device, a first message to at least one user equipment (UE), wherein the first message indicates a configuration of at least one configured bandwidth (BW) dedicated for sounding reference signal (SRS) transmission used for determining a position of the UE;
receiving, by the network device, the SRS transmission from the at least one UE on the at least one configured BW;
wherein the at least one configured BW comprises an active bandwidth part (BWP) or a positioning BW.
12. The method of claim 11 , the method further comprising:
transmitting, by the network device, a second message to the at least one UE, wherein the second message indicates a deactivation command for the at least one configured BW.
13. The method of claim 12 , wherein the second message is an explicit indication to deactivate the SRS or an implicit indication to deactivate the SRS, wherein the implicit indication comprises at least one of:
the UE receiving location information;
the UE receiving a location information acknowledgement;
the UE receiving an activation command for SRS in a new configured BW;
a delay period; and
expiration of a timer.
14. The method of claim 13 further comprising transmitting an indication of the delay period in:
a radio resource control (RRC) message; or
a downlink control information (DCI).
15. The method of claim 11 , the method further comprising SRS activation in a different configured BW when the UE receives an implicit indication to deactivate the SRS or an explicit deactivation command for the SRS in the at least one configured BW.
16. An apparatus comprising:
a processor; and
a computer-readable medium having stored thereon instructions that when executed by the processor cause the apparatus to:
transmit a first message to at least one user equipment (UE), wherein the first message indicates a configuration of at least one configured bandwidth (BW) dedicated for sounding reference signal (SRS) transmission used for determining a position of the UE;
receive the SRS transmission from the at least one UE on the at least one configured BW;
wherein the at least one configured BW comprises an active bandwidth part (BWP) or a positioning BW.
17. The apparatus of claim 16 , further comprising instructions that when executed by the processor cause the apparatus to:
transmit a second message from the network device in the serving cell, wherein the second message indicates a deactivation command for the at least one configured BW.
18. The apparatus of claim 17 , wherein the second message is an explicit indication to deactivate the SRS or an implicit indication to deactivate the SRS, wherein the implicit indication comprises at least one of:
the UE receiving location information;
the UE receiving a location information acknowledgement;
the UE receiving an activation command for SRS in a new configured BW;
a delay period; and
expiration of a timer.
19. The apparatus of claim 18 further comprising instructions that when executed by the processor cause the apparatus to transmit an indication of the delay period in:
a radio resource control (RRC) message; or
a downlink control information (DCI).
20. The apparatus of claim 16 , further comprising instructions that when executed by the processor cause the apparatus to perform SRS activation in a different configured BW when the UE receives an implicit indication to deactivate the SRS or an explicit deactivation command for the SRS in the at least one configured BW.