Granted Patent B2

US 12,513,489 · App. 17/661,504 · Granted Dec 30, 2025

Inventors: Lisi Li (Beijing, CN); Lixiang Xu (Beijing, CN); Hong Wang (Beijing, CN); Weiwei Wang (Beijing, CN)

Assignee: Samsung Electronics Co., Ltd.

H04W4/029H04L5/0048

Abstract

Claims (42)

1 . A method performed by a first base station in a wireless communication system, the method comprising:

receiving a retrieve user equipment (UE) context request message from a second base station where a UE in an inactive state moved from the first base station; and

transmitting, to the second base station, a retrieve UE context response message as a response to the retrieve UE context request message,

wherein the retrieve UE context request message includes an identifier (ID) of the UE,

wherein the retrieve UE context response message includes positioning information for the UE including requested sounding reference signal (SRS) transmission characteristics, a routing ID corresponding to a location management node, and a new radio positioning protocol A (NRPPa) transaction ID, and

wherein the requested SRS transmission characteristics include a frequency resource for a SRS and a periodicity of the SRS.

2 . The method of claim 1 , further comprising:

transmitting, from a central unit (CU) to a distributed unit (DU), a message including a SRS configuration for positioning; and

based on the UE entering into the inactive state, transmitting, from the CU to the DU, a UE context release command message including information indicating a reservation of a positioning related configuration,

wherein, in case that the information indicating the reservation of the positioning related configuration is included in the UE context release command message, the SRS configuration for positioning is not released for the UE in the inactive state, and

wherein the CU and the DU are included in the first base station.

3 . The method of claim 1 , wherein the retrieve UE context request message further includes information on a cause indicating that a resumption of a radio resource control (RRC) connection initiated by the UE is for an SRS based positioning in the inactive state.

4 . A first base station in a wireless communication system, the first base station comprising:

a memory;

a transceiver; and

a processor coupled with the memory and the transceiver, the processor configured to:

receive a retrieve user equipment (UE) context request message from a second base station where a UE in an inactive state moved from the first base station, and

transmit, to the second base station, a retrieve UE context response message as a response to the retrieve UE context request message,

wherein the retrieve UE context request message includes an identifier (ID) of the UE,

wherein the retrieve UE context response message includes positioning information for the UE including requested sounding reference signal (SRS) transmission characteristics, a routing ID corresponding to a location management node, and a new radio positioning protocol A (NRPPa) transaction ID, and

wherein the requested SRS transmission characteristics include a frequency resource for a SRS and a periodicity of the SRS.

5 . The first base station of the claim 4 , wherein the processor is further configured to:

transmit, from a central unit (CU) to a distributed unit (DU) via the transceiver, a message including a sounding reference signal (SRS) configuration for positioning, and

based on the UE entering into the inactive state, transmit, from the CU to the DU, a UE context release command message including information indicating a reservation of a positioning related configuration,

wherein, in case that the information indicating the reservation of the positioning related configuration is included in the UE context release command message, the SRS configuration for positioning is not released for the UE in the inactive state, and

wherein the CU and the DU are included in the first base station.

6 . A method performed by a second base station in a wireless communication system, the method comprising:

receiving, from a user equipment (UE) in an inactive state, a radio resource control (RRC) resume request message;

transmitting, to a first base station, a retrieve UE context request message, based on the UE moving from the first base station to the second base station; and

receiving, from the first base station, a retrieve UE context response message as a response to the retrieve UE context request message,

wherein the retrieve UE context request message includes an identifier (ID) of the UE,

wherein the retrieve UE context response message includes positioning information for the UE including requested sounding reference signal (SRS) transmission characteristics, a routing ID corresponding to a location management node, and a new radio positioning protocol A (NRPPa) transaction ID, and

wherein the requested SRS transmission characteristics include a frequency resource for a SRS and a periodicity of the SRS.

7 . A second base station in a wireless communication system, the second base station comprising:

a transceiver; and

a processor configured to:

receive, from a user equipment (UE) in an inactive state, a radio resource control (RRC) resume request message,

transmit, to a first base station, a retrieve UE context request message, based on the UE moving from the first base station to the second base station, and

receive, from the first base station, a retrieve UE context response message as a response to the retrieve UE context request message,

wherein the retrieve UE context request message includes an identifier (ID) of the UE,

wherein the retrieve UE context response message includes positioning information for the UE including requested sounding reference signal (SRS) transmission characteristics, a routing ID corresponding to a location management node, and a new radio positioning protocol A (NRPPa) transaction ID, and

wherein the requested SRS transmission characteristics include a frequency resource for a SRS and a periodicity of the SRS.

Assignments (1)

Priority Claims (3)

Continuity (1)

References Cited (30)