EP0370826A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Signalling and control protocol for a communication system
Assignee: Motorola Solutions Inc
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Filing: 1989-11-24
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Granted: —
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Expires: 2009-11-24
Abstract
Abstract A signalling and control protocol is provided wherein each subscriber unit (106) operating with a communication system (100) must transmit a request (200, 200 min or 200 sec ) to communicate to a central station. If a communication channel is available, the central station returns a channel grant (210), which includes a time code representing a time duration during which the requesting subscriber may communicate. After receiving the channel grant (210), the subscriber unit may communicate for a time interval not exceeding the time duration, and, immediately prior to the expiration of the time duration, the subscriber unit may itself provide a warning tone indicating the impending loss of the communication channel. Conversely, if a communication channel is not available, the central station provides a busy message (216), which includes a code (218) representing the requesting subscriber unit's position is a call request queue.
Inventors
- 👤 Brian Keith A. Johnson
- 👤 Stelios J. Patsiokas
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 14:55
CPC Classifications
H; H04; H04W; H04W72/00; H04W72/30; H04W76/00; H04W76/10; H04W76/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
83 words
In a two-way communication system having a central station for allocating at least one communication channel among a plurality of subscriber units, a signalling and control method for limiting the duration of a transmission by a subscriber unit, characterized by the steps of: at a subscriber unit: (a) transmitting a message representing a request to communicate; (b) receiving a code representing a time duration during which said subscriber unit may communicate; and, (c) communicating for a time interval not exceeding said time duration.
Claim 2
Dependent Claim
83 words
In a two-way communication system having a central station for allocating at least one communication channel among a plurality of subscriber units, a signalling and control method for limiting the duration of a transmission by a subscriber unit, characterized by the steps of: at a subscriber unit: (a) transmitting a message representing a request to communicate; (b) receiving a code representing a time duration during which said subscriber unit may communicate; and, (c) communicating for a time interval not exceeding said time duration.
Claim 3
Dependent Claim
35 words
The method of claim 1, wherein step (c) comprises the steps of: (c1) programming a timer means to said time duration; (c2) communicating for said time interval not exceeding the expiration of said timer means.
Claim 4
Dependent Claim
23 words
The method of claim 2, which includes the step of: (c3) activating a warning signal a predetermined time before said timer means expires.
Claim 5
Dependent Claim
56 words
In method according to claim 1, 2 or 3 characterized by the further steps of: at the central station: (a) receiving said message representing said request to communicate; (b) determining said time duration during which said subscriber unit may communicate; and, (c) transmitting said code representing a time duration during which said subscriber unit may communicate.
Claim 6
Dependent Claim
27 words
The method of claim 4, wherein step (b) of said central station comprises the step of determining said time duration during which said subscriber unit may communicate.
Claim 7
Independent Claim
63 words
A method according to any one of claims 1 to 3 characterized by communicating for said time interval when a communication channel is available and receiving a code representing a queue position indicating a number of other subscriber units that may communicate prior to said subscriber unit being allowed to communicate and displaying said queue position when a communication channel is not available.
Claim 8
Dependent Claim
90 words
In a two-way communication system having a central station for allocating at least one communication channel among a plurality of subscriber units, a signalling method of apprising a subscriber of an approximate duration until a communication channel becomes available, characterized by the steps of: at a subscriber unit: (a) transmitting a message representing a request to communicate; (b) receiving a code representing a queue position indicating a number of other subscriber units that may communicate prior to said subscriber unit being allowed to communicate; and, (c) displaying said queue position.
Claim 9
Dependent Claim
90 words
In a two-way communication system having a central station for allocating at least one communication channel among a plurality of subscriber units, a signalling method of apprising a subscriber of an approximate duration until a communication channel becomes available, characterized by the steps of: at a subscriber unit: (a) transmitting a message representing a request to communicate; (b) receiving a code representing a queue position indicating a number of other subscriber units that may communicate prior to said subscriber unit being allowed to communicate; and, (c) displaying said queue position.
Claim 10
Dependent Claim
53 words
A method according to claim 7 characterized by the further steps of: at a central station: (a) receiving said message representing said request to communicate; (b) determining how many other requests to communicate will be granted prior to said said request of said subscriber unit; (c) transmitting said code representing said queue position.
Claim 11
Dependent Claim
66 words
A subscriber unit for a two-way communication system having a central station for allocating at least one communication channel among a plurality of subscriber units, characterized by: means for transmitting a message representing a request to communicate; means for receiving a code representing a time duration during which said subscriber unit may communicate; and, means for communicating for a time interval not exceeding said time duration.
Claim 12
Dependent Claim
66 words
A subscriber unit for a two-way communication system having a central station for allocating at least one communication channel among a plurality of subscriber units, characterized by: means for transmitting a message representing a request to communicate; means for receiving a code representing a time duration during which said subscriber unit may communicate; and, means for communicating for a time interval not exceeding said time duration.
Claim 13
Dependent Claim
72 words
A subscriber unit for a two-way communication system having a central station for allocating at least one communication channel among a plurality of subscriber units, characterized by: means for transmitting a message representing a request to communicate; means for receiving a code representing a queue position indicating a number of other subscriber units that may communicate prior to said subscriber unit being allowed to communicate; and, means for displaying said queue position.
Claim 14
Dependent Claim
72 words
A subscriber unit for a two-way communication system having a central station for allocating at least one communication channel among a plurality of subscriber units, characterized by: means for transmitting a message representing a request to communicate; means for receiving a code representing a queue position indicating a number of other subscriber units that may communicate prior to said subscriber unit being allowed to communicate; and, means for displaying said queue position.
Claim 15
Dependent Claim
162 words
In a two-way communication system having a central station for allocating at least one communication channel among a plurality of subscriber units, and a means for interconnecting a telephone unit to said two-way communication to facilitate communication between telephone units and subscriber units, a method for apprising a telephone unit for an approximate duration until a communication channel becomes available, characterized by the steps of: at the central station: (a) receiving a signal from a telephone unit representing a request to communicate; (b) determining how many other requests to communicate will be granted prior to said request of said telephone unit; (c) transmitting a voice message containing an indication of how many other units must communicate prior to said telephone unit being allowed to communicate; at said telephone unit: (a) accessing the central station thereby providing said signal; and, (b) receiving said voice message containing said indicating how many other units may communicate prior to said telephone unit being allowed to communicate.
Claim 16
Dependent Claim
162 words
In a two-way communication system having a central station for allocating at least one communication channel among a plurality of subscriber units, and a means for interconnecting a telephone unit to said two-way communication to facilitate communication between telephone units and subscriber units, a method for apprising a telephone unit for an approximate duration until a communication channel becomes available, characterized by the steps of: at the central station: (a) receiving a signal from a telephone unit representing a request to communicate; (b) determining how many other requests to communicate will be granted prior to said request of said telephone unit; (c) transmitting a voice message containing an indication of how many other units must communicate prior to said telephone unit being allowed to communicate; at said telephone unit: (a) accessing the central station thereby providing said signal; and, (b) receiving said voice message containing said indicating how many other units may communicate prior to said telephone unit being allowed to communicate.
References Cited (Backward Citations)
No citation records indexed.
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