Multiplex communications – Communication over free space – Message addressed to multiple destinations
Reexamination Certificate
2004-12-22
2011-11-22
Harper, Kevin C (Department: 2462)
Multiplex communications
Communication over free space
Message addressed to multiple destinations
C370S328000, C455S450000
Reexamination Certificate
active
08064375
ABSTRACT:
Inter-cell handover (or cell reselection) in order to provide load balancing in wireless networks, in particular in hierarchical (overlay) networks, wherein the mobile stations in the cells are associated to different multicast groups. A technique for assigning one or more members of a multicast group to cells of radio network is described. This technique includes determining among multicast group members in a first cell one or more first group members having the highest resource demand in this cell. Next, for each cell of a cell cluster and in relation to a second group member having the highest resource demand in the considered cell, the relative resource consumption increase if the one or more first group members were assigned to said considered cell is determined. This determination is also carried out for the first cell but disregarding the one or more first group members having the highest resource demand. These one or more first members are then assigned to the cell that is associated with a minimum compensated relative resource consumption increase or a minimum compensated relative resource increase. In one embodiment, the cells are hierarchically structured and the assignment of member of the multicast group cells is allowed to be carried out on different hierarchy layers.
REFERENCES:
patent: 2003/0022683 (2003-01-01), Beckmann et al.
patent: 2003/0060216 (2003-03-01), Kamel et al.
Il Han et al “An Efficient Channel Allocation Scheme for Multicast Traffic in Multitier Cellular Systems” IEICE Transactions on Communications, Apr. 2001, E84-B(4), 1087-93.
Gunnar Bark “Adaptive cell load sharing in WCDMA” Ericsson internal report No. ERA/SVZ/R-01:015; Sep. 2001.
Harper Kevin C
Telefonaktiebolaget L M Ericsson (publ)
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