Invention Grant
US08111676B2 Loseless roaming via bridging between access ports 有权
通过接入端口之间的桥接进行无损漫游

  • Patent Title: Loseless roaming via bridging between access ports
  • Patent Title (中): 通过接入端口之间的桥接进行无损漫游
  • Application No.: US11942422
    Application Date: 2007-11-19
  • Publication No.: US08111676B2
    Publication Date: 2012-02-07
  • Inventor: Ramesh Sekhar
  • Applicant: Ramesh Sekhar
  • Applicant Address: US NY Holtsville
  • Assignee: Symbol Technologies, Inc.
  • Current Assignee: Symbol Technologies, Inc.
  • Current Assignee Address: US NY Holtsville
  • Main IPC: H04W4/00
  • IPC: H04W4/00
Loseless roaming via bridging between access ports
Abstract:
In a network comprising a wireless device, a first access point (AP) and a plurality of neighbor APs, a method is provided for reducing the chances of packet loss when the wireless device roams from the first AP to one of the neighbor APs. For example, when the first AP is transmitting a particular packet of a packet stream from to the wireless device, the wireless device begins to move away from the first AP toward at least one of the neighbor APs. The first AP maintains an acknowledgement counter for the particular packet which counts a number of times the particular packet has been transmitted by the first AP without receiving an acknowledgement (ACK) message from the wireless device confirming successful reception of the particular packet from the first AP. The first AP determines whether an ACK message was received for the particular packet, and if not, the first AP determines whether the number of times the particular packet has been sent is equal to a particular number of attempts. If the first AP determines that the number of times is equal to the particular number of attempts, then the first AP forwards the particular packet to the neighbor APs. Any of the neighbor APs which receive the particular packet, can then format the source address field of the particular packet with the MAC address of the first AP, and forward it to the wireless device.
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