US6188767B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of providing group call services in a CDMA communications system
Assignee: Google Technology Holdings LLC
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Filing: 1998-04-29
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Granted: 2001-02-13
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Expires: 2018-04-29
Abstract
Abstract The present invention encompasses a base station and method of providing communication services to a plurality of communication units. The method includes the steps of sending communication information between the base station and at least two of the plurality of communication units. A first step of identifying communication units produces a group identifier. A scrambling code, based at least in part on the group identifier, is then used to encode the communication information for transmission.
Inventors
- 👤 Michael L. Needham
- 👤 Leigh M. Chinitz
- 👤 Duane C. Rabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:13
CPC Classifications
H; H04; H04W; H04W4/00; H04W4/06; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2628; H04J; H04J13/00; H04J13/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
91 words
In a base station for use in a digital communications system that provides communication services to a plurality of communication units, a method of sending communication information between the base station and at least two of the plurality of communication units, the method comprising the steps of: identifying the at least two of the plurality of communication units to produce a group identifier that corresponds to the at least two of the plurality of communication units identified; and generating a scrambling code based at least in part on the group identifier.
Claim 2
Dependent Claim
91 words
In a base station for use in a digital communications system that provides communication services to a plurality of communication units, a method of sending communication information between the base station and at least two of the plurality of communication units, the method comprising the steps of: identifying the at least two of the plurality of communication units to produce a group identifier that corresponds to the at least two of the plurality of communication units identified; and generating a scrambling code based at least in part on the group identifier.
Claim 3
Dependent Claim
23 words
The method of claim 1 , further comprising the step of encoding the communication information using the scrambling code to produce encoded information.
Claim 4
Dependent Claim
22 words
The method of claim 1 , further comprising the step of sending, to the at least two communication units, the group identifier.
Claim 5
Dependent Claim
22 words
The method of claim 1 , further comprising the step of transmitting the encoded information to the at least two communication units.
Claim 6
Dependent Claim
103 words
In a communication unit for use in a digital communications system that includes a base station for providing communication services to a plurality of such communication units, a method of receiving communication information from the base station comprising the steps of: identifying a call type; when the call type identifies a group call to a predetermined group, determining whether the communication unit is a member of the predetermined group; and when the communication unit is determined to be a member of the predetermined group, generating a scrambling code based at least in part on a group identifier that corresponds to the predetermined group.
Claim 7
Dependent Claim
103 words
In a communication unit for use in a digital communications system that includes a base station for providing communication services to a plurality of such communication units, a method of receiving communication information from the base station comprising the steps of: identifying a call type; when the call type identifies a group call to a predetermined group, determining whether the communication unit is a member of the predetermined group; and when the communication unit is determined to be a member of the predetermined group, generating a scrambling code based at least in part on a group identifier that corresponds to the predetermined group.
Claim 8
Dependent Claim
23 words
The method of claim 5 , wherein the step of identifying comprises the step of receiving call type information from the base station.
Claim 9
Dependent Claim
27 words
The method of claim 5 , wherein the step of determining comprises the step of retrieving the group identifier from a memory location in the communication unit.
Claim 10
Dependent Claim
23 words
The method of claim 5 , wherein the step of determining comprises the step of receiving the group identifier from the base station.
Claim 11
Dependent Claim
19 words
The method of claim 5 , further comprising the step of decoding the communication information using the scrambling code.
Claim 12
Dependent Claim
77 words
In a communication unit for use in code division multiple access (CDMA) communications system that includes a base station for providing communication services to a plurality of communication units, a method of participating in a group call comprising the steps of: identifying a group identifier for the group call that corresponds to the at least two of the plurality of communication units identified; and generating a long code based at least in part on the group identifier.
Claim 13
Dependent Claim
77 words
In a communication unit for use in code division multiple access (CDMA) communications system that includes a base station for providing communication services to a plurality of communication units, a method of participating in a group call comprising the steps of: identifying a group identifier for the group call that corresponds to the at least two of the plurality of communication units identified; and generating a long code based at least in part on the group identifier.
Claim 14
Dependent Claim
26 words
The method of claim 10 , further comprising the step of using the long code to decode information during the group call to produce decoded information.
Claim 15
Dependent Claim
19 words
The method of claim 11 , further comprising the step of demodulating the decoded information during the group call.
Claim 16
Dependent Claim
31 words
The method of claim 10 , wherein the group call is a dispatch call and the step of identifying comprises the step of identifying a talkgroup ID for the dispatch call.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-02-13 | 2004-08-14 | 2005-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-02-13 | 2008-08-14 | 2009-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-02-13 | 2012-08-14 | 2013-02-13 | $7700.00 | Window Closed / Lapsed |