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EP0395092A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Mobile telephone system

Assignee: NEC Corp
•
Filing: 1990-04-27
•
Granted: —
•
Expires: 2010-04-27
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Abstract

Abstract On-board equipment for a mobile telephone system has a function of reporting the degree of busyness of message channels available in a service area. While the equipment is in a stand-by condition with no communication being held thereon, the degree of busyness is determined on the basis of electric field levels of individual message channels or control information sent from a control station. When the electric field levels are used to determine the degree of busyness, the electric fields of a plurality of message channels assigned to the service area are detected. If any of the msssage channels has an electric field level higher than a predetermined level, that message channel is determined to be busy. The rate of use of the message channels is calculated by using the number of assigned message channels and the number of occupied message channels. The calculated rate of use is displayed as information which is indicative of the busyness of the message channels. When the busyness is determined on the basis of control information, a lockout signal sent from the control station and indicative of the fact that no idle message channels are available is detected. The number of lockout signals having appeared within a predetermined period of time is determined and displayed as busyness information.

Inventors

  • 👤 Koji Maeda
  • 👤 Shinji Kawamura

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 15:19
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 105 words
Vehicle-mounted telephone equipment for communicating with a base station by using one of a predetermined number of radio message channels, comprising: first detecting means for detecting an electric field level of each of said predetermined number of message channels to produce a detected electric field level; second detecting means responsive to said detected electric field levels for detecting the number of the message channels whose electric field levels are higher than a predetermined level; and calculating means for producing busyness information indicative of a condition in which said message channels are occupied by using the detected number of said message channels and said predetermined number.
Claim 2
Dependent Claim 105 words
Vehicle-mounted telephone equipment for communicating with a base station by using one of a predetermined number of radio message channels, comprising: first detecting means for detecting an electric field level of each of said predetermined number of message channels to produce a detected electric field level; second detecting means responsive to said detected electric field levels for detecting the number of the message channels whose electric field levels are higher than a predetermined level; and calculating means for producing busyness information indicative of a condition in which said message channels are occupied by using the detected number of said message channels and said predetermined number.
Claim 3
Dependent Claim 15 words
Telephone equipment as claimed in claim 1, further comprising means for indicating said busyness information.
Claim 4
Dependent Claim 34 words
Telephone equipment as claimed in claim 1 or 2, further comprising means for detecting a control signal not meant for said telephone equipment out of control signals which are sent from the base station.
Claim 5
Dependent Claim 26 words
Telephone equipment as claimed in any one of claims 1 to 3, further comprising memory means for storing frequencies of the predetermined number of message channels.
Claim 6
Dependent Claim 98 words
Vehicle-mounted telephone equipment for executing processing for a communication in response to control signals sent from a base station and communication with said base station over one of message channels, said telephone equipment comprising: detecting means for detecting a lockout signal indicative of the fact that none of said message channels are idle out of said control signals; counting means for counting said lockout signal having appeared within a predetermined period of time; and calculating means for producing busyness information indicative of a condition wherein said message channels are used by using the number of lockout signals counted.
Claim 7
Dependent Claim 98 words
Vehicle-mounted telephone equipment for executing processing for a communication in response to control signals sent from a base station and communication with said base station over one of message channels, said telephone equipment comprising: detecting means for detecting a lockout signal indicative of the fact that none of said message channels are idle out of said control signals; counting means for counting said lockout signal having appeared within a predetermined period of time; and calculating means for producing busyness information indicative of a condition wherein said message channels are used by using the number of lockout signals counted.
Claim 8
Dependent Claim 15 words
Telephone equipment as claimed in claim 5, further comprising means for indicating said busyness information.
Claim 9
Dependent Claim 37 words
Telephone equipment as claimed in claim 5 or 6, wherein said calculating means comprises comparing means for comparing the number of lockout signals counted with a predetermined number to produce a resultant output as said busyness information.

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