Patent EP0308253A2 successfully refreshed from Google Patents.
EP0308253A2
Expired / Lapsed
EP
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Method of assigning frequency channel in mobile communications system
Assignee: NEC Corp
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Filing: 1988-09-16
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Granted: —
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Expires: 2008-09-16
Abstract
Abstract In order to attain a frequency spectrum efficiency by narrowing channel interval without inducing interference from adjacent channels, a signal level of a mobile unit which requests channel access is detected at a land site. The signal level thus detected is used to assign a channel to the incoming mobile unit such that the assigned channel is adjacent to a channel whose signal level is closest to the signal level of the assigned channel. Further, in order to meet magnitude changes of received signals, the magnitudes are checked so as to reassign currently allocated channels.
Inventors
- 👤 Yoshihiko Akaiwa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 21:25
CPC Classifications
H; H04; H04W; H04W72/00; H04W72/50; H04W72/54; H04W72/542
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A method of assigning a channel to a mobile unit at a land site of a mobile communications system wherein said land site communicates with a plurality of mobile units through a plurality of channels, comprising the steps of: (a) receiving at said land site a signal from a first mobile unit which requires channel access; (b) determining a signal level received at step (a); (c) determining location of the signal level among signal levels from second mobile units which are communicating with said land site; and (d) assigning a channel to said first mobile unit in a manner that the assigned channel is adjacent to a channel whose signal level is close to the signal level of said first mobile unit.
Claim 2
Independent Claim
122 words
A method of assigning a channel to a mobile unit at a land site of a mobile communications system wherein said land site communicates with a plurality of mobile units through a plurality of channels, comprising the steps of: (a) receiving at said land site a signal from a first mobile unit which requires channel access; (b) determining a signal level received at step (a); (c) determining location of the signal level among signal levels from second mobile units which are communicating with said land site; and (d) assigning a channel to said first mobile unit in a manner that the assigned channel is adjacent to a channel whose signal level is close to the signal level of said first mobile unit.
Claim 3
Dependent Claim
26 words
A method as claimed in claim 1, said signal levels from said second mobile units are previously stored in a memory provided in said land site.
Claim 4
Independent Claim
86 words
A method of reassigning at least one channel to a mobile unit at a land site of a mobile communications system wherein said land site communicates with a plurality of mobile units through a plurality of channels, comprising the steps of: (a) determining signal levels of the channels which are currently used to communicate mobile units with said land site; (b) determining difference of the signal levels between adjacent channels; and (c) performing reassignment if the difference between any two adjacent channels exceeds a predetermined magnitude.
Claim 5
Independent Claim
86 words
A method of reassigning at least one channel to a mobile unit at a land site of a mobile communications system wherein said land site communicates with a plurality of mobile units through a plurality of channels, comprising the steps of: (a) determining signal levels of the channels which are currently used to communicate mobile units with said land site; (b) determining difference of the signal levels between adjacent channels; and (c) performing reassignment if the difference between any two adjacent channels exceeds a predetermined magnitude.
Claim 6
Dependent Claim
24 words
A method as claimed in claim 3, said signal levels in step (a) are previously stored in a memory provided in said land site.
References Cited (Backward Citations)
No citation records indexed.
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