Bearer management apparatus and method, and communication system

Patent metadata

Field	Value
Publication number	US-10959281-B2
Application number	US-201916598845-A
Country	US
Kind code	B2
Filing date	Oct 10, 2019
Priority date	Mar 28, 2014
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

A terminal is capable dual connectivity with a base station, the terminal including: a processor configured to perform a process that change, release, or deactivate a bearer among Secondary Cell Group, and to trigger transmission of a Packet Data Convergence Protocol (PDCP) status report according to the process; and, a transmitter configured to transmit the PDCP status report.

First claim

What is claimed is:

1. A terminal capable of dual connectivity with a base station, the terminal comprising:
a processor configured to perform a process that changes a type of a bearer from Secondary Cell Group (SCG) bearer to Master Cell Group (MCG) bearer, releases the bearer, or deactivates the bearer, and triggers transmission of a Packet Data Convergence Protocol (PDCP) status report when a PDCP entity reconfiguration is requested and an associated Radio Link Control (RLC) entity is released for a radio bearer according to the process; and
a transmitter configured to transmit the PDCP status report.

2. The terminal according to claim 1 , further comprising
a receiver configured to receive from the base station a control signal that indicates the process, wherein the processor performs the process according to the control signal.

3. The terminal according to claim 2 , wherein, the control signal includes a configuration information for a logical channel identity corresponding to the bearer.

4. The terminal according to claim 2 , wherein, the control signal includes a logicalChannelIdentity in an information element DRB-ToAddMod, and a logical channel identity corresponding to the logicalChannelIdentity is present.

5. The terminal according to claim 2 , wherein, the control signal includes a configuration information for a PDCP entity corresponding to the bearer.

6. The terminal according to claim 2 , wherein, the control signal includes a pdcp-Config in an information element DRB-ToAddMod, and PDCP information corresponding to the pdcp-Config is present.

7. The terminal according to claim 1 , wherein the processor triggers transmission of the PDCP status report according to the bearer type.

8. The terminal according to claim 1 , wherein the processor triggers transmission of the PDCP status report according to the bearer type is changed from a first type to a second type.

9. A base station capable of dual connectivity with a terminal, the base station comprising:
a transmitter configured to transmit to the terminal a control signal that indicates to change a type of a bearer from Secondary Cell Group (SCG) bearer to Master Cell Group (MCG) bearer, release the bearer, or deactivate the bearer; and
a receiver configured to receive from the terminal a Packet Data Convergence Protocol (PDCP) status report that is transmitted by the terminal after the terminal triggers transmission of the PDCP status report when a PDCP entity reconfiguration is requested and an associated Radio Link Control (RLC) entity is released for a radio bearer.

10. The base station according to claim 9 , wherein, the control signal includes a configuration information for a logical channel identity corresponding to the bearer.

11. The base station according to claim 9 , wherein, the control signal includes a logicalChannelIdentity in an information element DRB-ToAddMod, and a logical channel identity corresponding to the logicalChannelIdentity is present.

12. The base station according to claim 9 , wherein, the control signal includes a configuration information for a PDCP entity corresponding to the bearer.

13. The base station according to claim 9 , wherein, the control signal includes a pdcp-Config in an information element DRB-ToAddMod, and PDCP information corresponding to the pdcp-Config is present.

14. A wireless system comprising:
a terminal configured to perform a process that changes a type of a bearer from Secondary Cell Group (SCG) bearer to Master Cell Group (MCG) bearer, releases the bearer, or deactivates the bearer, triggers transmission of a Packet Data Convergence Protocol (PDCP) status report when a PDCP entity reconfiguration is requested and an associated RLC Radio Link Control (RLC) entity is released for a radio bearer according to the process, and transmits the PDCP status report; and
a base station configured to receive from the terminal the PDCP status report.

Assignees

• Fujitsu Ltd

Inventors

• Chang Ningjuan
• Xu Haibo
• Lu Yanling
• Wang Weiwei

Classifications

• H04W76/15

  Setup of multiple wireless link connections · CPC title

• H04W76/36 Primary

  for reassigning the resources associated with the released connections · CPC title

• H04W76/32

  Release of transport tunnels · CPC title

• H04W76/19

  Connection re-establishment · CPC title

• H04W84/045

  using private Base Stations, e.g. femto Base Stations, home Node B · CPC title