Method and apparatus for resource management for conditional handover in wireless communication system

Patent metadata

Field	Value
Publication number	US-2020267604-A1
Application number	US-202016791354-A
Country	US
Kind code	A1
Filing date	Feb 14, 2020
Priority date	Feb 14, 2019
Publication date	Aug 20, 2020
Grant date	—

Abstract

The present disclosure relates to a communication method and system for converging a 4th-Generation (4G) communication system or a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The disclosure discloses a method by a first base station in a wireless communication system, the method including transmitting, to a second base station, a handover (HO) request message including conditional handover (CHO) information; and receiving, from the second base station, a HO request acknowledge message including identifier information on at least one cells associated with the second base station.

First claim

What is claimed is:

1 . A method by a first base station in a wireless communication system, the method comprising:
transmitting, to a second base station, a handover(HO) request message including conditional handover (CHO) information; and receiving, from the second base station, a HO request acknowledge message including identifier information on at least one cells associated with the second base station.

2 . The method of claim 1 , the method further comprising:
starting a timer of the first base station in responding to receiving the HO request acknowledge message.

3 . The method of claim 1 , the method further comprising:
transmitting, to the second base station, a HO cancel message to cancel handover associated to at least one cells prepared for a conditional handover (CHO).

4 . The method of claim 1 , the method further comprising:
receiving, from the second base station, a first message including cause information.

5 . The method of claim 1 , the method further comprising:
transmitting, to a terminal, a radio resource control (RRC) message to deconfigure information on a conditional handover (CHO).

6 . A method by a second base station in a wireless communication system, the method comprising:
receiving, from a first base station, a handover(HO) request message including conditional handover (CHO) information; and transmitting, to the first base station, a HO request acknowledge message including identifier information on at least one cells associated with the second base station.

7 . The method of claim 6 , wherein a timer of the first base station is started in responding to receiving the HO request acknowledge message from the second base station.

8 . The method of claim 6 , the method further comprising:
receiving, from the first base station, a HO cancel message to cancel handover associated to at least one cells prepared for a conditional handover(CHO).

9 . The method of claim 6 , the method further comprising:
transmitting, to the first base station, a first message including cause information.

10 . The method of claim 6 , wherein a radio resource control (RRC) message to deconfigure information on a conditional handover (CHO) is transmitted from the first base station to a terminal.

11 . A first base station in a wireless communication system, the the first base station comprising:
a transceiver; and a controller coupled with the transceiver and configured to: transmit, to a second base station, a handover(HO) request message including conditional handover (CHO) information; and receive, from the second base station, a HO request acknowledge message including identifier information on at least one cells associated with the second base station.

12 . The first base station of claim 11 , wherein the controller is further configured to start a timer of the first base station in responding to receiving the HO request acknowledge message.

13 . The first base station of claim 11 , wherein the controller is further configured to transmit, to the second base station, a HO cancel message to cancel handover associated to at least one cells prepared for a conditional handover (CHO).

14 . The first base station of claim 11 , wherein the controller is further configured to receive, from the second base station, a first message including cause information.

15 . The first base station of claim 11 , wherein the controller is further configured to transmit, to a terminal, a radio resource control (RRC) message to deconfigure information on a conditional handover (CHO).

16 . A second base station in a wireless communication system, the second base station comprising:
a transceiver; and a controller coupled with the transceiver and configured to: receive, from a first base station, a handover(HO) request message including conditional handover (CHO) information; and transmit, to the first base station, a HO request acknowledge message including identifier information on at least one cells associated with the second base station.

17 . The second base station of claim 16 , wherein a timer of the first base station is started in responding to receiving the HO request acknowledge message from the second base station.

18 . The second base station of claim 16 , wherein the controller is further configured to receive, from the first base station, a HO cancel message to cancel handover associated to at least one cells prepared for a conditional handover (CHO).

19 . The second base station of claim 16 , wherein the controller is further configured to transmit, to the first base station, a first message including cause information.

20 . The second base station of claim 16 , wherein a radio resource control (RRC) message to deconfigure information on a conditional handover (CHO) is transmitted from the first base station to a terminal.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Hwang June
• Van Der Velde Himke

Classifications

• H04W36/1443

  between licensed networks · CPC title

• H04W36/0064 Primary

  of control information between different access points · CPC title

• H04W36/362

  Conditional handover · CPC title

• H04W36/0005 Primary

  Control or signalling for completing the hand-off · CPC title

• H04W28/26

  Resource reservation · CPC title