Loseless roaming via bridging between access ports
US8111676B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 2007 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | Mar 5, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W92/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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 whi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.