IPC Definitions - January 01, 2012
H04W 36/00 - Definition
This main group covers:
Transferring on-going connection(s) of a user or terminal in connected state to different network resource(s) or administrative domains with the purpose of avoiding or limiting loss or degradation of said connection(s) due to user mobility, wireless link conditions or system loading. The reselection can take place at the user and/or system initiative based on fixed or agreed criteria and can be performed for all or part of the assigned resources.
(Re)ordering of candidates lists, temporary storage, buffering of connection data during reselection, performing registration, binding or location updates during reselection of network equipments or administrative domains.
In this main group, the following terms or expressions are used with the meaning indicated:
hand-off | means a change of a radio link while a connection is ongoing (active state) or readily set up although no data are currently transmitted (dormant state) |
user mobility | means the user changing his point(s) of attachment in the network(s), e.g. access point due to movement in service areas |
registration, binding, location updates | means using system, user or terminal tracking information to detect user mobility |
seamless, soft reselection | means a reselection whereby wireless links are temporarily added or deleted in such a manner that the terminal keeps at least one link connected |
lossless reselection | means a reselection whereby information loss during reselection is prevented or avoided |
In patent documents the expressions "handover" and "hand-off" are often used as synonyms