EP0440436A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cellular mobile telephone system
Assignee: NEC Corp
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Filing: 1991-01-30
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Granted: —
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Expires: 2011-01-30
Abstract
Abstract In a cellular mobile telephone system serving a plurality of cells, each of the cells being assigned a unique standby channel, the mobile station is assigned several standby channels and a system identifier identifying the system. The standby channels are scanned and one of the scanned channels having a highest signal level is selected. If there is a match between the system identifier of the selected standby channel and the system identifier of the mobile station, the mobile station is ready to originate or receive a call. If there is no originating or terminating call, the identifier of a call setup channel specified by the standby channel is stored into a different location of a memory. Otherwise, the identifiers stored in the memory are scanned, and one of the scanned call setup channels is selected.
Inventors
- 👤 Ikio Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 09:43
CPC Classifications
H; H04; H04W; H04W48/00; H04W48/16; H04W76/00; H04W76/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
186 words
A method for selecting channels of a mobile station for a cellular mobile telephone system serving a plurality of cells, each of the cells being assigned a unique standby channel, and said mobile station is assigned a plurality of standby channels and a system identifier identifying said system, the method comprising: a) scanning said standby channels and selecting one of the scanned standby channels having a highest signal level; b) detecting whether there is a match between a system identifier contained in the selected standby channel and the system identifier of said mobile station; c) if said match is detected, detecting whether there is a call originating from or terminating to the mobile station; d) if there is no originating or terminating call detected by the step (c), storing the identifier of a call setup channel specified by the standby channel into a successive location of a memory; e) repeating the steps (a) to (d); and f) if there is an originating or terminating call detected by the step (c), scanning the identifiers stored in said memory, and selecting one of the scanned call setup channels.
Claim 2
Dependent Claim
22 words
A method as claimed in claim 1, wherein the call setup channel selected by the step (f) has a highest signal level.
Claim 3
Dependent Claim
33 words
A method as claimed in claim 1, wherein the identifier of the call setup channel selected by the step (f) is a most recently stored identifier among the identifiers stored in said memory.
Claim 4
Dependent Claim
32 words
A method as claimed in claim 1, wherein the identifier of the call setup channel selected by the step (f) is a most frequently stored identifier of those stored in said memory.
Claim 5
Dependent Claim
183 words
A mobile station for a cellular mobile telephone system serving a plurality of cells, each of the cells being assigned a unique standby channel, and said mobile station is assigned a plurality of standby channels and a system identifier identifying said system, the method comprising: a tunable radio-frequency transceiver; and a channel controller coupled to said transceiver for causing said transceiver to tune to one of the standby channels having a highest signal level, detecting a match between a system identifier contained in the selected standby channel and the system identifier of said mobile station, detecting whether there is a call originating from or terminating to the mobile station, storing the identifier of a call setup channel specified by the standby channel into a different location of a memory in response to the absence of said originating or terminating call, scanning the identifiers stored in said memory in response to the presence of said originating or terminating call and selecting one of the scanned stored identifiers, and causing said transceiver to tune to one of the call setup channels having said selected identifier.
Claim 6
Dependent Claim
29 words
A mobile station as claimed in claim 5, wherein the tuned call setup channel has a highest signal level among the call setup channels corresponding to said scanned identifiers.
Claim 7
Dependent Claim
30 words
A mobile station as claimed in claim 5, wherein the identifier of the tuned call setup channel is a most recently stored identifier among the identifiers stored in said memory.
Claim 8
Dependent Claim
29 words
A mobile station as claimed in claim 5, wherein the identifier of the tuned call setup channel is a most frequently stored identifier of those stored in said memory.
References Cited (Backward Citations)
No citation records indexed.
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