Sounding reference signal for uplink-based multi-cell measurement

Patent metadata

Field	Value
Publication number	US-12501377-B2
Application number	US-201916731347-A
Country	US
Kind code	B2
Filing date	Dec 31, 2019
Priority date	Jan 4, 2019
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

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. This enhanced SRS measurement based on multiple cell and/or NR LMU measurements may facilitate more beneficial usages such as UL-based positioning and UL-based mobility.

First claim

What is claimed is:

1 . A method comprising:
receiving, by a user equipment (UE) from a serving cell, downlink (DL) reference signal (RS) configuration information for configuring the UE to receive a first DL RS from a non-serving cell, wherein the non-serving cell is a cell other than any cell that serves the UE, and wherein the DL RS configuration information for configuring the UE to receive the first DL RS from the non-serving cell indicates: a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block frequency location; an SS/PBCH block subcarrier spacing; an SS/PBCH block index; a physical cell identifier (PCID) of a cell transmitting an SS/PBCH block; and a timing reference to obtain a time location of the SS/PBCH block; receiving, by the UE from the non-serving cell, the first DL RS; and transmitting, by the UE, a sounding reference signal (SRS), the SRS transmitted in accordance with a transmission parameter, the transmission parameter including a transmit power obtained based on a pathloss estimated from the first DL RS received from the non-serving cell.

2 . The method of claim 1 , wherein the first DL RS is the SS/PBCH block.

3 . The method of claim 1 , wherein the DL RS configuration information further configures the UE to receive a second DL RS from the non-serving cell, and the transmission parameter further includes a spatial domain transmission filter obtained based on the second DL RS.

4 . The method of claim 3 , wherein the transmitting, by the UE, the SRS comprises transmitting the SRS in accordance with the spatial domain transmission filter, the spatial domain transmission filter being the same as a spatial domain filter used for receiving the second DL RS.

5 . The method of claim 4 , wherein the DL RS configuration information is received using higher layer signaling, and the higher layer signaling comprises a higher layer parameter indicating the second DL RS used for obtaining the spatial domain transmission filter.

6 . The method of claim 3 , wherein the first DL RS is same as the second DL RS.

7 . The method of claim 3 , wherein the second DL RS is an SS/PBCH or a channel state information reference signal (CSI-RS).

8 . The method of claim 1 , wherein the indication further indicates:
a SS/PBCH block measurement timing configuration (SMTC) window indication including both periodicity and offset.

9 . The method of claim 1 , wherein the SS/PBCH block frequency location is a New Radio Absolute Radio Frequency Channel Number (NR-ARFCN) value.

10 . The method of claim 1 , wherein the timing reference is a timing of a primary cell (Pcell).

11 . The method of claim 1 , wherein the DL RS configuration information is received using higher layer signaling, and the higher layer signaling comprises a higher layer parameter indicating the first DL RS used for estimating the pathloss.

12 . The method of claim 1 , wherein the transmitting, by the UE, the SRS comprises:
transmitting the SRS using an SRS resource of an SRS resource set in accordance with the transmission parameter obtained based on the first DL RS; or transmitting the SRS using all SRS resources of the SRS resource set in accordance with the transmission parameter obtained based on the first DL RS.

13 . The method of claim 1 , wherein the non-serving cell is a neighbor cell.

14 . A user equipment (UE) comprising:
at least one processor; a non-transitory computer-readable storage medium having stored thereon, computer-executable instructions that when executed by the at least one processor cause the UE to: receive, from a serving cell, downlink (DL) reference signal (RS) configuration information for configuring the UE to receive a first DL RS from a non-serving cell, wherein the non-serving cell is a cell other than any cell that serves the UE, and wherein the DL RS configuration information for configuring the UE to receive the first DL RS from the non-serving cell indicates: a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block frequency location; an SS/PBCH block subcarrier spacing; an SS/PBCH block index; a physical cell identifier (PCID) of a cell transmitting an SS/PBCH block; and a timing reference to obtain a time location of the SS/PBCH block; receive, from the non-serving cell, the first DL RS; and transmit, a sounding reference signal (SRS), the SRS transmitted in accordance with a transmission parameter, the transmission parameter including a transmit power based on a pathloss estimated from the first DL RS received from the non-serving cell.

15 . The UE of claim 14 , wherein the first DL RS is the SS/PBCH block.

16 . The UE of claim 14 , wherein the DL RS configuration information further configures the UE to receive a second DL RS from the non-serving cell, and the transmission parameter further includes a spatial domain transmission filter based on the second DL RS.

17 . The UE of claim 16 , wherein the computer-executable instructions, that when executed by the at least one processor cause the UE to transmit the SRS, include computer-executable instructions to cause the UE to:
transmit the SRS in accordance with the spatial domain transmission filter, the spatial domain transmission filter being the same as a spatial domain filter used for receiving the second DL RS.

18 . The UE of claim 17 , wherein the DL RS configuration information is received using higher layer signaling, and the higher layer signaling comprises a higher layer parameter indicating the second DL RS used for obtaining the spatial domain transmission filter.

19 . The UE of claim 16 , wherein the first DL RS is same as the second DL RS.

20 . The UE of claim 16 , wherein the second DL RS is an SS/PBCH or a channel state information reference signal (CSI-RS).

21 . The UE of claim 15 , wherein the computer-executable instructions, that when executed by the at least one processor cause the UE to transmit the SRS, include computer-executable instructions to cause the UE to:
transmit the SRS using an SRS resource of an SRS resource set in accordance with the transmission parameter based on the first DL RS; or transmit the SRS using all SRS resources of the SRS resource set in accordance with the transmission parameter based on the first DL RS.

22 . The UE of claim 14 , wherein the SS/PBCH block frequency location is a New Radio Absolute Radio Frequency Channel Number (NR-ARFCN) value.

23 . The UE of claim 14 , wherein the timing reference is a timing of a primary cell (Pcell).

24 . The UE of claim 14 , wherein the DL RS configuration information is received using higher layer signaling, and the higher layer signaling comprises a higher layer parameter indicating the first DL RS used for estimating the pathloss.

25 . The UE of claim 14 , wherein the non-serving cell is a neighbor cell.

26 . A method comprising:
receiving, by a user equipment (UE), higher layer signaling including a configuration message configuring a first Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block for pathloss estimation by the UE, wherein the configuration message in the higher layer signaling indicates: an SS/PBCH block frequency location, an SS/PBCH block subcarrier spacing, an SS/PBCH block index, a physical cell identifier (PCID) of a serving cell transmitting the first SS/PBCH block, and a timing reference to obtain a time location of the

Assignees

• Huawei Tech Co Ltd

Inventors

• Zarifi Keyvan

Classifications

• H04W72/30

  Resource management for broadcast services · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W52/242

  taking into account path loss · CPC title

• H04W52/322

  Power control of broadcast channels · CPC title

• H04W52/146

  Uplink power control · CPC title