METHODS AND APPARATUS FOR QUICKLY EXPLOITING A NEW LINK DURING HAND-OFF IN A WIRELESS NETWORK
First Claim
1. A method for handing off a wireless link from an old access router to a new access router, comprising:
- receiving a first flow before a hand-off indication is received;
receiving a second flow after a hand-off indication is received;
determining that a wireless link is no longer usable after a first portion of the first flow is sent to a mobile node on the wireless link;
forwarding, based on the determining, the second flow after a second portion of the first flow to the new access router.
2 Assignments
0 Petitions
Accused Products
Abstract
A way to deliver traffic to a mobile node that is undergoing a hand off between two Access Routers (AR) is described. The method of the present invention operates to perform some or all of the following. Decrease, e.g., minimize, delays between the time the old link breaks and the first packet is sent from the new link. Reduce and/or eliminate packet bursts from old to new AR when an old (existing) link breaks. Ensure that packets are neither lost nor duplicated during hand off. Maintain QoS control of delivery order to the MN. Make good or best use of multiple links during Make before break hand-off. Support both uplink and downlink traffic.
14 Citations
8 Claims
-
1. A method for handing off a wireless link from an old access router to a new access router, comprising:
-
receiving a first flow before a hand-off indication is received; receiving a second flow after a hand-off indication is received; determining that a wireless link is no longer usable after a first portion of the first flow is sent to a mobile node on the wireless link; forwarding, based on the determining, the second flow after a second portion of the first flow to the new access router. - View Dependent Claims (2, 3, 4, 6, 7, 8)
-
-
5. An apparatus for handing off a wireless link from an old access router to a new access router, comprising:
-
means for receiving a first flow before a hand-off indication is received; means for receiving a second flow after a hand-off indication is received; means for determining that a wireless link is no longer usable after a first portion of the first flow is sent to a mobile node on the wireless link; means for forwarding, based on the determining, the second flow after a second portion of the first flow to the new access router.
-
Specification