Method and apparatus for transmitting establishment cause value in wireless communication system

• US 9,532,278 B2
• Filed: 09/28/2012
• Issued: 12/27/2016
• Est. Priority Date: 09/28/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Kyung Min, Ryu, Jin Sook, Byun, Dae Wook, Xu, Jian, Lee, Young Dae, Jung, Sung Hoon
• Primary Examiner(s): Sarwar, Babar
• Application Number:
  US14/239,856
• Publication Number:
  US 20140213264A1
• Time in Patent Office: 1,551 Days
• Field of Search: 455411-4142, 455418-421, 4554351-453, 4554561-457, 370328-332, 370/338, 370/444
• US Class Current: 1/1
• CPC Class Codes: H04W 36/0055 Transmission or use of information for re-establishing the radio link
• CPC Class Codes: H04W 36/0072 of resource information of target access point
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method and apparatus of performing a handover procedure in a wireless communication system is provided. The target eNodeB (eNB) receives a specific establishment cause of a user equipment (UE). The specific establishment cause among a plurality of establishment causes comprises emergency, high priority access, mobile terminated access, mobile oriented signaling, mobile oriented data, and delay tolerant access. The target eNB transmits a handover command message to the UE after receiving the specific establishment cause.

Claims

1. A method of performing a handover procedure, by a target base station, in a wireless communication system, the method comprising:

receiving, from a source base station, a handover request message including a radio resource control (RRC) connection request message, wherein the RRC connection request message includes a specific establishment cause of a user equipment (UE), a UE-Identity field indicating a UE identity facilitating contention resolution, and a Random Value field indicating an integer value, wherein the specific establishment cause among a plurality of establishment causes includes emergency, high priority access, mobile terminated access, mobile oriented signaling, mobile oriented data, and delay tolerant access; and

transmitting, to the UE, a handover command message.

2. The method of claim 1, wherein the handover request message is received from the source base station during an X2 interface based handover procedure.

3. The method of claim 1, wherein the plurality of establishment causes include at least one of a machine type communication (MTC) device access priority, MTC mobile terminated access, MTC mobile oriented signaling, or MTC mobile oriented data.

4. The method of claim 1, further comprising:

transmitting, to the source base station, a handover request acknowledge message including a transparent container, wherein the transparent container includes a new cell-radio network temporary identifier (C-RNTI), security algorithm identifiers of the target base station, a dedicated random access channel (RACH) preamble, and system information blocks (SIBs).

5. A target base station in a wireless communication system:

a radio frequency (RF) unit for transmitting or receiving a radio signal; and

a processor, operatively coupled to the RF unit and configured to;

receive, from a source base station, a handover request message including a radio resource control (RRC) connection request message, wherein the RRC connection request message includes a specific establishment cause of a user equipment (UE), a UE-Identity field indicating a UE identity facilitating contention resolution, and a Random Value field indicating an integer value, wherein the specific establishment cause among a plurality of establishment causes includes emergency, high priority access, mobile terminated access, mobile oriented signaling, mobile oriented data, and delay tolerant access; and

transmit, to the UE, a handover command message.

6. The target base station of claim 5, wherein the handover request message is received from the source base station during an X2 interface based handover procedure.

7. The target base station of claim 5, wherein the plurality of establishment causes include at least one of a machine type communication (MTC) device access priority, MTC mobile terminated access, MTC mobile oriented signaling, or MTC mobile oriented data.

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

transmit, to the source base station, a handover request acknowledge message including a transparent container, wherein the transparent container includes a new cell-radio network temporary identifier (C-RNTI), security algorithm identifiers of the target base station, a dedicated random access channel (RACH) preamble, and system information blocks (SIBs).