Title:
【発明の名称】単位区域構成の無線電話システムにおいてビジターの位置登録レジスタのデータベースを飽和から保護する方法
Document Type and Number:
Japanese Patent JP2870609
Kind Code:
B2
Abstract:
With the intention of avoiding saturation of the database of this register, this method consists in:
- allocating a mobile subscriber temporary identity word to each mobile subscriber which signals his presence for the first time in a geographical zone corresponding to the relevant register, this word containing a first field (IND) which denotes an n-tuple from a table of the database, and a second field (IPA) which denotes a time period (P0) where the temporary identity word is allocated, and which is incremented each time an eventuality causes a partial or total erasure of the memory of the register;
- "refreshing" the temporary identity of a subscriber each time the latter again signals his presence, after a silence of duration greater than a threshold value; the first field being unchanged, and the second field denoting the new period where the subscriber signals his presence;
- writing each temporary identity word into an n-tuple denoted by the first field;
- freeing this n-tuple when the subscriber manifests his presence in a zone corresponding to another register;
- periodically erasing from the database n-tuples corresponding to temporary identity words whose second fields (IPA) correspond to the oldest periods (P0 + C1 to P0 + C0, modulo 2<15>);
- erasing from the database, when its fill approaches saturation, n-tuples corresponding to temporary identity words whose second fields (IPA) correspond to less old periods (p0 + C2 to p0 + C0 modulo 2<15>).
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Inventors:
JANNMISHERU DORORII
PASUKARU TOREIYAARU
PASUKARU TOREIYAARU
Application Number:
JP7554591A
Publication Date:
March 17, 1999
Filing Date:
January 18, 1991
Export Citation:
Assignee:
ARUKATERU SHITO
International Classes:
H04W8/06; H04W8/26; H04W24/00; H04W24/02; (IPC1-7): H04Q7/34
Domestic Patent References:
| JP63133723A |
Attorney, Agent or Firm:
Yoshio Kawaguchi (2 outside)