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EP0189920A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Radio channel control method for mobile communication system

Assignee: NEC Corp
•
Filing: 1986-01-30
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Granted: —
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Expires: 2006-01-30
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Abstract

Abstract A radio channel control method for a narrow-zone mobile communication system in which a plurality of base stations share a plurality of channels and each selects any of the channels for setting up a call independently of the others, e.g. a portable telephone system or a cordless telephone system. Installed in each of all the base stations are transceiver, free to use all the channels, a device capable of identifying channels on which radio waves have reached the own station based on reception sensitivity, a device for selecting a channel, a device for transmitting a pilot signal and others, and a device for setting up a call. The channel for a pilot signal is adequately changed to shorten a duration of cochannel interference. Connection of multiple base stations to a single mobile station is eliminated by causing each base station to add to the pilot signal identification data which is particular to the base station.

Inventors

  • 👤 Yoshitake Matsuo

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-27 05:01
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/02; H04W16/10; H04W72/00; H04W72/50; H04W72/54

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 117 words
A radio channel control method for a mobile communication system in which a plurality of base stations share a plurality of channels and each selects any of the channels for setting up a call independently of the other base stations, said radio channel control method comprising the steps of: (a) scanning all the channels at a time of channel selection; (b) selecting one channel out of the channels which show no reception sensitivity while excluding the channels which show reception sensitivity; (c) transmitting a pilot signal on the selected channel; and (d) when a signal has not been received over a predetermined period of time over the channel used to transmit the pilot signal, selecting another channel.
Claim 2
Dependent Claim 117 words
A radio channel control method for a mobile communication system in which a plurality of base stations share a plurality of channels and each selects any of the channels for setting up a call independently of the other base stations, said radio channel control method comprising the steps of: (a) scanning all the channels at a time of channel selection; (b) selecting one channel out of the channels which show no reception sensitivity while excluding the channels which show reception sensitivity; (c) transmitting a pilot signal on the selected channel; and (d) when a signal has not been received over a predetermined period of time over the channel used to transmit the pilot signal, selecting another channel.
Claim 3
Dependent Claim 27 words
A radio channel control method as claimed in claim 1, wherein step (c) comprises (e) adding to the pilot signal identification data representative of the base station.
Claim 4
Dependent Claim 42 words
A radio channel control method as claimed in claim 2, further comprising the step of (f) causing the mobile station to send to the base station a signal which is accompanied by the identification signal which is contained in the received signal.

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