Method and device for switching a serving cell and method and device supporting on-demand system information message

Patent metadata

Field	Value
Publication number	US-10979941-B2
Application number	US-201916712380-A
Country	US
Kind code	B2
Filing date	Dec 12, 2019
Priority date	Jun 16, 2017
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

The present disclosure relates to a communication method and system for converging 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 provides a method and device for switching a serving cell.

First claim

What is claimed is:

1. A method performed by a network entity corresponding to a central unit (CU) of a secondary node (SN) in a wireless communication system, the method comprising:
transmitting, to a network entity corresponding to a distributed unit (DU) of the SN via an F1 interface, a request message for requesting a context setup of a terminal that includes a first list of at least one candidate primary secondary cell (PSCell) and a second list of at least one secondary cell (SCell) to be setup;
receiving, from the network entity corresponding to the DU via the F1 interface, a response message for confirming the context setup of the terminal that includes a third list of at least one SCell failed to setup and a cause for each SCell of the at least one SCell failed to setup in the third list; and
transmitting, to a network entity corresponding to a master node (MN) associated with the SN, a message for requesting a modification of the SN based on the response message.

2. The method of claim 1 ,
wherein the message for requesting the modification of the SN includes secondary cell group (SCG) configuration information, a list of at least one bearer to be modified, and information on a tunnel endpoint at the SCG for delivering data of the at least one bearers, and
wherein the method further comprises receiving, from the network entity corresponding to the MN, a message for confirming the modification of the SN as a response to the message for requesting the modification of the SN.

3. The method of claim 2 , further comprising:
transmitting, to the network entity corresponding to the DU via the F1 interface, a message for requesting a context modification of the terminal that includes a fourth list of at least one SCell to be setup; and
receiving, from the network entity corresponding to the DU via the F1 interface, a message for confirming the context modification of the terminal that includes a fifth list of at least one SCell failed to setup.

4. The method of claim 3 ,
wherein the message for confirming the context modification of the terminal further includes a cause associated with the fifth list of at least one SCell failed to setup included in the message for confirming the context modification of the terminal, and
wherein the cause associated with the fifth list indicates an overload of an SCell failed to setup by the network entity corresponding to the DU.

5. The method of claim 2 , wherein the tunnel endpoint is used for delivering downlink data of the at least one bearer to the terminal.

6. The method of claim 1 ,
wherein the cause indicates an overload of an SCell failed to setup by the network entity corresponding to the DU.

7. A network entity corresponding to a central unit (CU) of a secondary node (SN) in a wireless communication system, the network entity corresponding to the CU comprising:
a transceiver configured to transmit and receive a signal; and
at least one processor configured to:
transmit, to a network entity corresponding to a distributed unit (DU) of the SN via the transceiver via an F1 interface, a request message for requesting a context setup of a terminal that includes a first list of at least one candidate primary secondary cell (PSCell) and a second list of at least one secondary cell (SCell) to be setup,
receive, from the network entity corresponding to the DU via the transceiver via the F1 interface, a response message for confirming the context setup of the terminal that includes a third list of at least one SCell failed to setup and a cause for each SCell of the at least one SCell failed to setup in the third list, and
transmit, to a network entity corresponding to a master node (MN) associated with the SN, a message for requesting a modification of the SN based on the response message.

8. The network entity corresponding to the CU of claim 7 ,
wherein the message for requesting the modification of the SN includes secondary cell group (SCG) configuration information, a list of at least one bearer to be modified, and information on a tunnel endpoint at the SCG for delivering data of the at least one bearer, and
wherein the at least one processor is further configured to receive, from the network entity corresponding to the MN via the transceiver, a message for confirming the modification of the SN as a response to the message for requesting the modification of the SN.

9. The network entity corresponding to the CU of claim 8 , wherein the at least one processor is further configured to:
transmit, to the network entity corresponding to the DU via the transceiver via the F1 interface, a message for requesting a context modification of the terminal that includes a fourth list of at least one SCell to be setup, and
receive, from the network entity corresponding to the DU via the transceiver via the F1 interface, a message for confirming the context modification of the terminal that includes a fifth list of at least one SCell failed to setup.

10. The network entity corresponding to the CU of claim 9 ,
wherein the message for confirming the context modification of the terminal further includes a cause associated with the fifth list of at least one SCell failed to setup included in the message for confirming the context modification of the terminal, and
wherein the cause associated with the fifth list indicates an overload of an SCell failed to setup by the network entity corresponding to the DU.

11. The network entity corresponding to the CU of claim 8 , wherein the tunnel endpoint is used for delivering downlink data of the at least one bearer to the terminal.

12. The network entity corresponding to the CU of claim 7 ,
wherein the cause indicates an overload of an SCell failed to setup by the network entity corresponding to the DU.

13. A network entity corresponding to a distributed unit (DU) of a secondary node (SN) in a wireless communication system, the network entity corresponding to the DU comprising:
a transceiver configured to transmit and receive a signal; and
at least one processor configured to:
receive, from a network entity corresponding to a central unit (CU) of the SN via the transceiver via an F1 interface, a request message for requesting a context setup of a terminal that includes a first list of at least one candidate primary secondary cell (PSCell) and a second list of at least one secondary cell (SCell) to be setup, and
transmit, to the network entity corresponding to the CU via the transceiver via the F1 interface, a response message for confirming the context setup of the terminal that includes a third list of at least one SCell failed to setup and a cause for each SCell of the at least one SCell failed to setup in the third list,

wherein a message for requesting a modification of the SN is transmitted to a network entity corresponding to a master node (MN) associated with the SN from the network entity corresponding to the CU based on the response message.

14. The network entity corresponding to the DU of claim 13 ,
wherein the message for requesting the modification of the SN includes secondary cell group (SCG) configuration information, a list of at least one bearer to be modified, and information on a tunnel endpoint at the SCG for delivering data of the at least one bearer, and
wherein a message for confirming the modification of the SN is transmitted from the network entity corresponding to the MN to the network entity corresponding to the CU as a response to the message for requesting the modification of the SN.

15. The network entity corresponding to the DU of claim 14 , wherein the at least one processor is further

Assignees

• Samsung Electronics Co Ltd

Inventors

• Wang Weiwei
• Ke Xiaowan
• Wang Hong
• Xu Lixiang

Classifications

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04W36/08

  Reselecting an access point · CPC title

• H04W36/0069

  in case of dual connectivity, e.g. decoupled uplink/downlink · CPC title

• H04W76/30

  Connection release · CPC title

• H04W76/20 Primary

  Manipulation of established connections · CPC title