Patent ID: 7826425
Filing Date: 2010-11-02
Classification: H04L,H04W

Abstract:
1. A method for loss-less roaming, comprising: transmitting a stream of voice packets from a first access point (“AP”) to a mobile unit (“MU”) within a coverage range of the first AP; the MU roaming beyond the range of the coverage area of the first AP preventing a voice packet from being transmitted from the first AP to the MU rendering this voice packet undelivered; retransmitting the undelivered voice packet from the first AP to the MU a predetermined number of times without receiving an acknowledgement from the MU; forwarding multiple copies of the undelivered voice packet, along with an encryption key distinct to the first AP, from the first AP to a plurality of neighboring access points each having their own distinct encryption key; and each of the neighboring APs transmitting its copy of the undelivered voice packet, along with the encryption key distinct to the first AP, for the MU, wherein the MU is able to receive and decrypt the copy of the voice packet using the encryption key distinct to the first AP.