Handover apparatus and method for avoiding in-device coexistence interference

摘要

The present disclosure relates to a handover apparatus and method capable of avoiding in-device coexistence interference. In order to prevent handover failure due to in-device coexistence interference, an SeNB provides TDM information (including TDM pattern information or TDM activation information) to a UE during a handover procedure, and the UE performs the handover with a TeNB according to the provided TDM information. By the disclosure, the UE can perform ISM signal transmission/reception and LTE signal transmission/reception with the TeNB in a discriminated manner according to a particular TDM pattern, so as to prevent handover failure due to the in-UE coexistence interference.

主权项

1. A method of performing a handover in a wireless communication system, the method comprising:
establishing a wireless connection with a User Equipment (UE) via a first wireless communication system, the first wireless communication system corresponding to a mobile communication system including Long Term Evolution (LTE) system; transmitting a handover request message of the UE, which supports the first wireless communication system and a second wireless communication system, to a Target evolved Node-B (TeNB), by a Source evolved Node-B (SeNB), wherein the handover request message includes Time Division Multiplexing (TDM) information related to avoidance of In-Device Coexistence (IDC) interference of the UE, the IDC interference of the UE is an interference between the first wireless communication system and the second wireless communication system in the UE, and the TDM information includes a subframe pattern in a bitmap form comprising zero or one for each bit to indicate an unscheduled subframe or a scheduled subframe for the first wireless communication system, respectively; receiving a handover admission OK message from the TeNB, by the SeNB; and generating a Radio Resource Control (RRC) connection reconfiguration message for a handover and transmitting the RRC connection reconfiguration message for the handover to the UE, in order to enable the UE to perform the handover to the TeNB, by the SeNB, wherein systems of the SeNB and the TeNB are different from the second wireless communication system.