BWP switching method, terminal and network side device

Patent metadata

Field	Value
Publication number	US-12362895-B2
Application number	US-202217880576-A
Country	US
Kind code	B2
Filing date	Aug 3, 2022
Priority date	Feb 6, 2020
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

A bandwidth part (BWP) switching method, a terminal and a network side device are provided. The BWP switching method performed by the terminal includes: receiving a BWP activation signaling, switching to a first BWP according to the received BWP activation signaling; and receiving a positioning reference signal (PRS) on the first BWP, wherein the first BWP meets at least one of the following: a numerology of the first BWP is consistent with a numerology of the PRS; or a bandwidth of the first BWP is not less than a bandwidth of the PRS.

First claim

The invention claimed is:

1. A bandwidth part (BWP) switching method, performed by a terminal, comprising:
receiving a BWP activation signaling;
switching to a first BWP according to the received BWP activation signaling; and
receiving a positioning reference signal (PRS) on the first BWP,
wherein the first BWP meets at least one of the following:
a numerology of the first BWP is consistent with a numerology of the PRS; or
a bandwidth of the first BWP is not less than a bandwidth of the PRS,

after switching to the first BWP according to the received BWP activation signaling, the method further comprises:
receiving a downlink channel or a downlink signal on the first BWP, wherein on a same orthogonal frequency division multiplexing (OFDM) symbol, the PRS and the downlink channel or the downlink signal are multiplexed on different resource blocks (RBs), the PRS occupies continuous RBs, and the downlink signal is a downlink signal other than the PRS.

2. The BWP switching method according to claim 1 , wherein before the switching to the first BWP according to the received BWP activation signaling, the method further comprises:
acquiring BWP configuration information,
wherein the BWP configuration information is configured or pre-configured on a network side or is agreed in a protocol.

3. The BWP switching method according to claim 2 , wherein the BWP configuration information comprises at least one of the following parameters:
a BWP identifier (ID);
a BWP subcarrier spacing;
a BWP cyclic prefix type;
a BWP usage, wherein the BWP usage is used to indicate whether the BWP is a BWP for receiving a PRS; or
BWP frequency domain location information.

4. The BWP switching method according to claim 2 , wherein the BWP configuration information further comprises: positioning assistance data, and the positioning assistance data at least comprises PRS time-frequency domain location information.

5. The BWP switching method according to claim 2 , wherein the BWP configuration information further comprises: configuration information of a downlink channel or a downlink signal.

6. The BWP switching method according to claim 1 , wherein before the switching to the first BWP according to the received BWP activation signaling, the method further comprises:
sending a first request message, wherein the first request message is used to indicate that the terminal needs to switch the BWP to receive the PRS, or is used to request a network side device to send the BWP activation signaling.

7. The BWP switching method according to claim 6 , wherein the first request message comprises at least one of the following information:
a switching request for switching to the BWP for receiving the PRS;
a BWP switching request;
at least one parameter of the configuration information of the BWP to which the terminal expects to switch; or
at least a part of positioning assistance data, wherein the positioning assistance data at least comprises PRS time-frequency domain location information.

8. The BWP switching method according to claim 6 , wherein the first request message is sent when at least one of the following conditions is met:
the terminal expects to measure the PRS beyond the bandwidth of the current active BWP;
the terminal expects to measure the PRS not matched with a numerology of the current active BWP;
at least a part of the bandwidth of the PRS is beyond the bandwidth of the current active BWP; or
the numerology of the PRS is not matched with the numerology of the current active BWP.

9. A bandwidth part (BWP) switching method, performed by a first network side device, comprising:
sending a BWP activation signaling, wherein the BWP activation signaling is used to indicate that a terminal is to be switched to a first BWP to receive a positioning reference signal (PRS),
wherein the first BWP meets at least one of the following:
a numerology of the first BWP is consistent with a numerology of the PRS; or
a bandwidth of the first BWP is not less than a bandwidth of the PRS,

wherein the terminal receives a downlink channel or a downlink signal on the first BWP after the terminal is switched to the first BWP, wherein on a same orthogonal frequency division multiplexing (OFDM) symbol, the PRS and the downlink channel or the downlink signal are multiplexed on different resource blocks (RBs), the PRS occupies continuous RBs, and the downlink signal is a downlink signal other than the PRS.

10. The BWP switching method according to claim 9 , wherein before the sending the BWP activation signaling, the method further comprises:
sending BWP configuration information,
wherein the BWP configuration information further comprises at least one of:
configuration information of a downlink channel or a downlink signal; or
positioning assistance data, and the positioning assistance data at least comprises PRS time-frequency domain location information.

11. The BWP switching method according to claim 10 , wherein the BWP configuration information comprises at least one of the following parameters:
a BWP identifier (ID);
a BWP subcarrier spacing;
a BWP cyclic prefix type;
a BWP usage, wherein the BWP usage is used to indicate whether the BWP is a BWP for receiving a PRS; or
BWP frequency domain location information.

12. The BWP switching method according to claim 9 , wherein the BWP activation signaling is sent when at least one of the following conditions is met:
at least a part of the bandwidth of the PRS is beyond the bandwidth of the current active BWP of the terminal;
the numerology of the PRS is not matched with the numerology of the current active BWP of the terminal;
the terminal is expected to measure the PRS beyond the bandwidth of the current active BWP; or
the terminal is expected to measure the PRS not matched with the numerology of the current active BWP.

13. The BWP switching method according to claim 9 , wherein after the sending the BWP activation signaling, the method further comprises:
sending a BWP deactivation signaling, wherein the BWP deactivation signaling is used to indicate that the terminal is to be switched to a second BWP.

14. The BWP switching method according to claim 9 , wherein before the sending the BWP activation signaling, the method further comprises:
receiving a first request message, wherein the first request message is used to indicate that the first network side device switches the BWP of the terminal to receive the PRS or is used to request the first network side device to send the BWP activation signaling, and
the first request message is sent by the terminal or a second network side device.

15. A bandwidth part (BWP) switching method, performed by a second network side device, comprising:
sending a first request message, wherein the first request message is used to indicate that a first network side device switches the BWP of a terminal to a first BWP to receive a positioning reference signal (PRS) or is used to request the first network side device to send a BWP activation signaling, wherein the BWP activation signaling is used to indicate that the terminal is to be switched to the first BWP to receive the PRS; and
the first BWP meets at least one of the following:
a numerology of the first BWP is consistent with a numerology of the PRS; and
a bandwidth of the first BWP is not less than a bandwidth of the PRS,

wherein the terminal receives a downlink channel or a downlink signal on the first BWP after the terminal is switched to the first BWP, wherein on a same orthogonal frequency division multiplexing (OFDM) symbol, the PRS and the downlink c

Assignees

• Vivo Mobile Communication Co Ltd

Inventors

• Si Ye
• Sun Peng
• Wu Huaming
• Wang Yuanyuan
• Zhuang Zixun

Classifications

• H04L27/2605

  Symbol extensions, e.g. Zero Tail, Unique Word [UW] · CPC title

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04L27/26025

  Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003) · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L5/0098 Primary

  Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands · CPC title