Systems and methods for multi-connectivity operation

• US 9,756,678 B2
• Filed: 12/13/2013
• Issued: 09/05/2017
• Est. Priority Date: 12/13/2013
• Status: Active Grant

• Current Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Yamada, Shohei
• Primary Examiner(s): Ngo, Ricky
• Assistant Examiner(s): PHILLIPS, MICHAEL K
• Application Number:
  US14/106,583
• Publication Number:
  US 20150173120A1
• Time in Patent Office: 1,362 Days
• CPC Class Codes: H04W 36/0069 in case of dual connectivity, e.g. decoupled uplink/downlink
• CPC Class Codes: H04W 36/0072 of resource information of target access point
• CPC Class Codes: H04W 72/00 Local resource management
• CPC Class Codes: H04W 76/11 Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/19 Connection re-establishment
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states

Abstract

A method for receiving a radio resource control (RRC) message by a user equipment (UE) is described. The method includes receiving an RRC connection reconfiguration message including mobility control information. In response to receiving the RRC connection reconfiguration message including mobility control information, a medium access control (MAC) entity of a secondary cell group (SCG) is released if any MAC entity of the SCG is established. In response to receiving the RRC connection reconfiguration message including mobility control information, a MAC entity of a master cell group (MCG) is reset.

Claims

1. A method for receiving a radio resource control (RRC) message by a user equipment (UE), comprising:

receiving an RRC connection reconfiguration message including mobility control information;

starting synchronizing to a downlink of a target primary cell (PCell) in a case that the RRC connection reconfiguration message including the mobility control information is received; and

resetting a medium access control (MAC) entity of a master cell group (MCG) and a MAC entity of a secondary cell group (SCG) if any MAC entity of the SCG is configured in the case that the RRC connection reconfiguration message including the mobility control information is received,

wherein the MAC entity of the MCG and the MAC entity of the SCG are configured for the UE, the MCG includes at least one PCell, and the SCG includes at least one primary SCell (PSCell).

2. The method of claim 1, further comprising re-establishing radio link control (RLC) entities of the MCG for all radio bearers (RBs) that are established in the case that the RRC connection reconfiguration message including the mobility control information is received.

3. The method of claim 1, further comprising releasing radio link control (RLC) entities of the SCG for all radio bearers (RBs) that are established, if any RLC entity of the SCG is established in the case that the RRC connection reconfiguration message including the mobility control information is received.

4. The method of claim 1, further comprising re-establishing packet data convergence protocol (PDCP) entities for all radio bearers (RBs) that are established for the MCG in the case that the RRC connection reconfiguration message including the mobility control information is received.

5. The method of claim 1, further comprising releasing packet data convergence protocol (PDCP) entities for all radio bearers (RBs) that are established for the SCG, if any PDCP entity of the SCG is established in the case that the RRC connection reconfiguration message including the mobility control information is received.

6. A user equipment (UE) for receiving a radio resource control (RRC) message, comprising:

a processor; and

memory in electronic communication with the processor, wherein instructions stored in the memory are executable to;

receive an RRC connection reconfiguration message including mobility control information;

start synchronizing to a downlink of a target primary cell (PCell) in a case that the RRC connection reconfiguration message including the mobility control information is received; and

reset a medium access control (MAC) entity of a master cell group (MCG) and MAC entity of a secondary cell group (SCG) if any MAC entity of the SCG is configured in the case that the RRC connection reconfiguration message including the mobility control information is received,

wherein the MAC entity of the MCG and the MAC entity of the SCG are configured for the UE, the MCG includes at least one PCell, and the SCG includes at least one primary SCell (PSCell).

7. The UE of claim 6, wherein the instructions are further executable to re-establish radio link control (RLC) entities for all radio bearers (RBs) that are established for the MCG in the case that the RRC connection reconfiguration message including the mobility control information is received.

8. The UE of claim 6, wherein the instructions are further executable to release radio link control (RLC) entities for all radio bearers (RBs) that are established for the SCG, if any RLC entity of the SCG is established in the case that the RRC connection reconfiguration message including the mobility control information is received.

9. The UE of claim 6, wherein the instructions are further executable to reestablish packet data convergence protocol (PDCP) entities for all radio bearers (RBs) that are established for the MCG in the case that the RRC connection reconfiguration message including the mobility control information is received.

10. The UE of claim 6, wherein the instructions are further executable to release packet data convergence protocol (PDCP) entities for all radio bearers (RBs) that are established for the SCG, if any PDCP entity of the SCG is established in the case that the RRC connection reconfiguration message including the mobility control information is received.

11. A non-transitory, tangible computer-readable medium for receiving radio resource control (RRC) message by a user equipment (UE), comprising executable instructions for:

receiving an RRC connection reconfiguration message including mobility control information;

starting synchronizing to a downlink of a target primary cell (PCell) in a case that the RRC connection reconfiguration message including the mobility control information is received; and

resetting a medium access control (MAC) entity of a master cell group (MCG) and MAC entity of a secondary cell group (SCG) if any MAC entity of the SCG is configured in the case that the RRC connection reconfiguration message including the mobility control information is received,

wherein the MAC entity of the MCG and the MAC entity of the SCG are configured for the UE, the MCG includes at least one PCell, and the SCG includes at least one primary SCell (PSCell).

12. The computer-readable medium of claim 11, wherein the computer-readable medium further comprises executable instructions for re-establishing radio link control (RLC) entities for all radio bearers (RBs) that are established for the MCG in the case that the RRC connection reconfiguration message including the mobility control information is received.

13. The computer-readable medium of claim 11, wherein the computer-readable medium further comprises executable instructions for releasing radio link control (RLC) entities for all radio bearers (RBs) that are established for the SCG, if any RLC entity of the SCG is established in the case that the RRC connection reconfiguration message including the mobility control information is received.

14. The computer-readable medium of claim 11, wherein the computer-readable medium further comprises executable instructions for re-establishing packet data convergence protocol (PDCP) entities for all radio bearers (RBs) that are established for the MCG in the case that the RRC connection reconfiguration message including the mobility control information is received.

15. The computer-readable medium of claim 11, wherein the computer-readable medium further comprises executable instructions for releasing packet data convergence protocol (PDCP) entities for all radio bearers (RBs) that are established for the SCG, if any PDCP entity of the SCG is established in the case that the RRC connection reconfiguration message including the mobility control information is received.