US4837858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subscriber unit for a trunked voice/data communication system
Assignee: Motorola Solutions Inc
•
Filing: 1987-04-30
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Granted: 1989-06-06
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Expires: 2007-04-30
Abstract
Abstract A trunked voice/data subscriber is provided that operates in either a voice mode, or one of three data modes. In a first data mode, the voice/data subscriber monitors the voice control channel to enable rapid participation in a voice call. In a second data mode, the subscriber monitors an assigned data channel until either commanded to change modes or until there has been no data activity for a predetermined time interval. Lastly, the subscriber may operate to remain in the last mode used so that, over time, the subscriber resides primarily in the mode predominately used. According to the invention, the voice/data subscriber must request a channel for each voice transmission. However, a data channel request need only be transmitted in no data channels are currently reallocated. If a data channel has been allocated, the subscriber may transmit at any time without first requesting access.
Inventors
- 👤 Sewim F. Ablay
- 👤 Stuart W. Thro
- 👤 Kenneth J. Zdunek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:22
CPC Classifications
H; H04; H04B; H04B7/00; H04W; H04W84/00; H04W84/02; H04W84/04; H04W84/08
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
137 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units; (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting over the control channel, a data channel request if no data channels are currently allocated; (c) receiving over the control channel, a data channel grant which identifies a particular communication channel as a data channel; (d) operating, thereafter, on said data channel until receiving a command over said data channel to monitor said control channel.
Claim 2
Dependent Claim
137 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units; (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting over the control channel, a data channel request if no data channels are currently allocated; (c) receiving over the control channel, a data channel grant which identifies a particular communication channel as a data channel; (d) operating, thereafter, on said data channel until receiving a command over said data channel to monitor said control channel.
Claim 3
Dependent Claim
157 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units; (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting over the control channel, a data channel request if not data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies a particular communication channel as a data channel; (d) operating, thereafter, on said data channel until a predetermined event occurs; said method further including the step of receiving, over said data channel, an information message identifying additional communication channels of said plurality of communication channels as data channels.
Claim 4
Dependent Claim
157 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units; (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting over the control channel, a data channel request if not data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies a particular communication channel as a data channel; (d) operating, thereafter, on said data channel until a predetermined event occurs; said method further including the step of receiving, over said data channel, an information message identifying additional communication channels of said plurality of communication channels as data channels.
Claim 5
Dependent Claim
29 words
The method of claim 1, which includes the step of storing, in a storage means, the identity of each of said plurality of communication channels allocated as data channels.
Claim 6
Dependent Claim
132 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units; (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting, over the control channel, a data channel request if no data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies a particular communication channel as a data channel; (d) operating, thereafter, on said data channel until the initiation of a voice channel request.
Claim 7
Dependent Claim
132 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units; (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting, over the control channel, a data channel request if no data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies a particular communication channel as a data channel; (d) operating, thereafter, on said data channel until the initiation of a voice channel request.
Claim 8
Dependent Claim
157 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units; (a) determining whether at least one of the communication channels has been allocated for data traffic, (b) transmitting, over the control channel, a data channel request if no data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies a particular communication channel as a data channel; (d) operating, thereafter, on said data channel until a predetermined event occurs; said method further including the step of receiving, over said control channel, an information message identifying additional communication channels of said plurality of communication channels as data channels.
Claim 9
Dependent Claim
157 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units; (a) determining whether at least one of the communication channels has been allocated for data traffic, (b) transmitting, over the control channel, a data channel request if no data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies a particular communication channel as a data channel; (d) operating, thereafter, on said data channel until a predetermined event occurs; said method further including the step of receiving, over said control channel, an information message identifying additional communication channels of said plurality of communication channels as data channels.
Claim 10
Dependent Claim
176 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating in a data mode within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units; (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting, over the control channel, a data channel request if no data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies a particular communication channel as a data channel; (d) operating on said data channel until the expiration of a predetermined time interval during which there was no data activity, and, thereafter, monitoring said control channel; said method further including the step of receiving, over said data channel an information message identifying additional communication channels of said plurality of communication channels as data channels.
Claim 11
Dependent Claim
176 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating in a data mode within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units; (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting, over the control channel, a data channel request if no data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies a particular communication channel as a data channel; (d) operating on said data channel until the expiration of a predetermined time interval during which there was no data activity, and, thereafter, monitoring said control channel; said method further including the step of receiving, over said data channel an information message identifying additional communication channels of said plurality of communication channels as data channels.
Claim 12
Dependent Claim
29 words
The method of claim 6, which includes the step of storing, in a storage means, the identity of each of said plurality of communication channels allocated as data channels.
Claim 13
Dependent Claim
176 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communicating channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating in a data mode within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units; (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting, over the control channel, a data channel request if no data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies a particular communication channel as a data channel; (d) operating on said data channel until the expiration of a predetermined time interval during which there was no data activity, and, thereafter, monitoring said control channel; said method further including the step of receiving, over said control channel, an information message identifying additional communication channels of said plurality of communication channels as data channels.
Claim 14
Dependent Claim
176 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communicating channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating in a data mode within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units; (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting, over the control channel, a data channel request if no data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies a particular communication channel as a data channel; (d) operating on said data channel until the expiration of a predetermined time interval during which there was no data activity, and, thereafter, monitoring said control channel; said method further including the step of receiving, over said control channel, an information message identifying additional communication channels of said plurality of communication channels as data channels.
Claim 15
Dependent Claim
166 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units: (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting, over the control channel, a data channel request if no data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies at least one communication channel as a data channel, and further identifies a particular one of said at least one identified communication channels as a first allocated data channel; (d) selecting one of said data channels from said at least one identified communication channels; (e) operating, thereafter, on said selected data channel until a predetermined event occurs.
Claim 16
Dependent Claim
166 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units: (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting, over the control channel, a data channel request if no data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies at least one communication channel as a data channel, and further identifies a particular one of said at least one identified communication channels as a first allocated data channel; (d) selecting one of said data channels from said at least one identified communication channels; (e) operating, thereafter, on said selected data channel until a predetermined event occurs.
Claim 17
Dependent Claim
23 words
The method of claim 9, wherein said predetermined event comprises receiving a command over said selected data channel to monitor said control channel.
Claim 18
Dependent Claim
31 words
The method of claim 9, which includes the step of receiving, over said data channel, an information message identifying additional communication channels of said plurality of communication channels as data channels
Claim 19
Dependent Claim
29 words
The method of claim 11, which includes the step of storing, in a storage means, the identity of each of said plurality of communication channels allocated as data channels.
Claim 20
Dependent Claim
25 words
The method of claim 9, wherein said predetermined event comprises receiving a command over said selected data channel to monitor said first allocated data channel.
Claim 21
Dependent Claim
20 words
The method of claim 9, wherein said predetermined event comprises the absence of data activity over a predetermined time interval
Claim 22
Dependent Claim
17 words
The method of claim 9, wherein said predetermined event comprises the initiation of a voice channel request.
Claim 23
Dependent Claim
201 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units: (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting, over the control channel, a data channel request if no data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies at least one of said plurality of communication channels as data channels, and further identifies a particular one of said at least one of said plurality of communication channels as a first allocated data channel; (d) operating on a data channel selected from said at least one of said plurality of communication channels until commanded to otherwise operate according to one of the group of commands: (i) monitor said control channel; (ii) monitor said first allocated data channel; (iii) generate a voice call request; and, thereafter, operating in accordance with said command.
Claim 24
Dependent Claim
201 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a method for operating within said system comprising the steps of: in at least one of said plurality of voice/data subscriber units: (a) determining whether at least one of the communication channels has been allocated for data traffic; (b) transmitting, over the control channel, a data channel request if no data channels are currently allocated; (c) receiving, over the control channel, a data channel grant, which identifies at least one of said plurality of communication channels as data channels, and further identifies a particular one of said at least one of said plurality of communication channels as a first allocated data channel; (d) operating on a data channel selected from said at least one of said plurality of communication channels until commanded to otherwise operate according to one of the group of commands: (i) monitor said control channel; (ii) monitor said first allocated data channel; (iii) generate a voice call request; and, thereafter, operating in accordance with said command.
Claim 25
Dependent Claim
154 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a voice/data subscriber unit comprising: means for determining whether at least one of the communication channels has been allocated for data traffic; means for transmitting, over the control channel, a data channel request if no data channels are currently allocated; means for receiving, over the control channel, a data channel grant, which identifies at least one communication channel as a data channel, and further identifies a particular one of said at least one identified communication channels as a first allocated data channel; means for selecting one of said data channels from said at least one identified communication channels; means for operating, thereafter, on said selected data channel until a predetermined event occurs.
Claim 26
Dependent Claim
154 words
In a trunked voice/data communication system having a plurality of voice/data subscriber units for communicating over a plurality of communication channels, some of which may be allocated for data traffic, and a particular one of which is reserved as a control channel, a voice/data subscriber unit comprising: means for determining whether at least one of the communication channels has been allocated for data traffic; means for transmitting, over the control channel, a data channel request if no data channels are currently allocated; means for receiving, over the control channel, a data channel grant, which identifies at least one communication channel as a data channel, and further identifies a particular one of said at least one identified communication channels as a first allocated data channel; means for selecting one of said data channels from said at least one identified communication channels; means for operating, thereafter, on said selected data channel until a predetermined event occurs.
References Cited (Backward Citations)
US4012597A
Cited
US4409687A
Cited
US4352183A
Cited
US4573206A
Cited
US4534061A
Cited
US4574163A
Cited
US4553262A
Cited
US4593389A
Cited
US4609778A
Cited
US4672601A
Cited
US4675863A
Cited
US4707832A
Cited
US4685123A
Cited
US4689788A
Cited
US4682367A
Cited
US4697281A
Cited
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| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |