Title:
階層セル構造を効率良くサポートする、セルの再選択を実施する方法および装置
Document Type and Number:
Japanese Patent JP4503904
Kind Code:
B2
Abstract:
A method for performing a cell reselection in a system comprised of a hierarchy of cells, wherein cells of one layer of the hierarchy have a size that differs from cells of another layer of the hierarchy. The method includes steps of (a) identifying to a user equipment a layer to which individual cells in a neighbor cell list are associated; (b) when performing neighbor cell measurements for reselection purposes, avoiding a measurement of cells in the list that are larger than a current serving cell unless a Cell Selection (S) parameter falls below a search threshold parameter (Ssearch), and is greater than zero; and (c), if S is less than or equal to zero, and no cell reselection to a better cell is in process, beginning a measurement of neighbor cells without regard for their hierarchical level. If the user equipment has made cell reselection to N different cells on the same hierarchical layer within a time Tmax, the user equipment initiates a reselection procedure for larger neighbor cells. This procedure accommodates user equipment that is moving at a relatively high speed through the cells. If the user equipment locates a larger cell, which fulfills cell reselection criteria Sn>0 and Qn>Qs+Qoffsets,n+Qhyst for a period of time Treselection, cell reselection to the larger cell is made. Furthermore, if the user equipment performs a cell reselection to the larger cell, the user equipment does not attempt to reselect to a smaller cell within a time X, unless an immediate cell evaluation is triggered, wherein the time X can be pre-specified, or can be set by the network.
More Like This:
Inventors:
Corpera, sari
Jansen, Kai
Jansen, Kai
Application Number:
JP2001543036A
Publication Date:
July 14, 2010
Filing Date:
December 06, 2000
Export Citation:
Assignee:
NOKIA CORPORATION
International Classes:
H04W16/32; H04W36/00; H04W36/04; H04W48/16
Domestic Patent References:
| JP4287430A | ||||
| JP8501430A | ||||
| JP9163450A | ||||
| JP2001136582A |
Foreign References:
| US5701586 |
Attorney, Agent or Firm:
Takashi Ishida
Jun Tsuruta
Shimichi Akihisa
Masaya Nishiyama
Higuchi Souji
Jun Tsuruta
Shimichi Akihisa
Masaya Nishiyama
Higuchi Souji