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    • 8. 发明授权
    • Method and apparatus for efficient handover in LTE
    • LTE中高效切换的方法和装置
    • US08509180B2
    • 2013-08-13
    • US12433802
    • 2009-04-30
    • Shailesh MaheshwariSai Yiu Duncan HoPeter A. Barany
    • Shailesh MaheshwariSai Yiu Duncan HoPeter A. Barany
    • H04W4/00
    • H04W76/10H04L1/1809H04L1/1848H04W36/08H04W74/08
    • An efficient use of downlink (DL) air-interface bandwidth during handoff of user equipment from a source cell to a target is provided. In conjunction with a handoff message to ensure receipt, expedited status exchanges are provided so that initial communications do not require a subsequent retransmission of duplicate data. A method for transmitting a dedicated Random Access Channel (RACH) preamble and cell information, receiving a RACH from the user equipment to start communication, and transmitting a handover message and a radio link control (RLC) status message or an UL grant in response to receiving the RACH is provided. Also, a method for receiving a handover message and target cell information from a source cell to start handover negotiations, initiating communication with target cell using the target cell information, receiving a handover message and (RLC) status message, and using the received information to approximate status reporting is provided.
    • 提供了在将用户设备从源小区切换到目标时,有效地使用下行链路(DL)空中接口带宽。 结合切换消息以确保接收,提供加速状态交换,使得初始通信不需要随后重传重复数据。 一种用于发送专用随机接入信道(RACH)前导码和小区信息的方法,从用户设备接收RACH以开始通信,以及响应于发送切换消息和无线电链路控制(RLC)状态消息或UL授权 提供接收RACH。 另外,一种用于从源小区接收切换消息和目标小区信息以开始切换协商的方法,使用目标小区信息发起与目标小区的通信,接收切换消息和(RLC)状态消息,并且使用所接收的信息 提供了近似状态报告。