Invention Grant
US08488557B2 Method for detecting a duplicate address, mobile station, network element and communication system 有权
检测重复地址,移动台,网元和通信系统的方法

  • Patent Title: Method for detecting a duplicate address, mobile station, network element and communication system
  • Patent Title (中): 检测重复地址,移动台,网元和通信系统的方法
  • Application No.: US12735351
    Application Date: 2008-01-14
  • Publication No.: US08488557B2
    Publication Date: 2013-07-16
  • Inventor: Fang LiuCaixia Chi
  • Applicant: Fang LiuCaixia Chi
  • Applicant Address: FR Paris
  • Assignee: Alcatel Lucent
  • Current Assignee: Alcatel Lucent
  • Current Assignee Address: FR Paris
  • Agency: Harness, Dickey & Pierce
  • International Application: PCT/CN2008/000088 WO 20080114
  • International Announcement: WO2009/089643 WO 20090723
  • Main IPC: H04W8/26
  • IPC: H04W8/26 H04L29/12
Method for detecting a duplicate address, mobile station, network element and communication system
Abstract:
The present invention proposes a method for detecting a duplicate address, a mobile station, a network element for controlling access of a mobile station to a wide area network and a communication network comprising a mobile station and at least two network element, wherein said mobile station is moving from a second access network pertaining to a second network element into a first access network pertaining to a first network element. Said method for detecting a duplicate address comprises: the mobile station sends a request message to the first network element; the first network element generates and sends a first message to the mobile station upon reception of said request message, said first message designating an explicit address configuration and including prefix information; the mobile station checks out the explicit address configuration, generates an address based on said prefix information and sends a message containing the generated address to the first network element for indicating that the mobile station requires registering the generated address with the first network element; and the first network element creates an entry for the mobile station if the generated address is not found in its address table, or generates and sends a second message to the mobile station for indicating that the generated address is a duplicate address if it is found in its address table and discards data packets with the duplicate address sent from the mobile station.
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