Patent US5734645A successfully refreshed from Google Patents.
US5734645A
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US
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Layer 2 protocol in a cellular communication system
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1994-10-31
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Granted: 1998-03-31
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Expires: 2014-10-31
Abstract
Abstract A method for transmitting messages using an efficient communications link protocol over an air interface of a cellular communications system is disclosed. A frame in the protocol is divided into a plurality of sections including a header section and a data section. The header section contains a field which indicates what type of information is contained in the frame.
Inventors
- 👤 A. Krister Raith
- 👤 John Diachina
- 👤 Bengt Persson
- 👤 Anthony Sammarco
- 👤 Anders Hoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:50
CPC Classifications
H; H04; H04W; H04W68/00; H04W68/02; H04W48/00; H04W48/20; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2643; H04B7/2656; H04L; H04L1/00; H04L1/004; H04L1/0045; H04L1/0046; H04L1/0056; H04L1/0057; H04L1/0059; H04L1/0061; H04L1/0071; H04L1/0072; H04L1/0078; H04L1/0083; H04L1/08; H04L1/12; H04L1/16; H04L1/1607; H04L1/1614; H04L1/1685; H04L1/18; H04L1/1803; H04L1/1809; H04L1/1829; H04L1/1848; H04L1/1867; H04L1/188; H04L1/20; H04L9/00; H04L9/40; H04W48/16; H04W68/025; H04W72/00; H04W72/04; H04W72/044; H04W72/0446; H04L1/0001; H04L1/0002; H04L2001/0092; H04L2001/0093; H04W48/08; H04W48/10; H04W52/00; H04W52/02; H04W52/0209; H04W52/0212; H04W52/0225; H04W52/0245; H04W88/00; H04W88/02; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A method for discriminating between a broadcast control channel and short-message-service/paging/access channels, SPACH channels, in a superframe in a cellular communication system with a layer 2 protocol, comprising the steps of: assigning a first cyclic redundancy check to SPACH frames; and assigning a second cyclic redundancy check to broadcast control channel frames, wherein a mobile station distinguishes between said SPACH and broadcast control channel frames by examining said cyclic redundancy checks, wherein said second cyclic redundancy check is said first cyclic redundancy check inverted.
Claim 2
Independent Claim
84 words
A method for discriminating between a broadcast control channel and short-message-service/paging/access channels, SPACH channels, in a superframe in a cellular communication system with a layer 2 protocol, comprising the steps of: assigning a first cyclic redundancy check to SPACH frames; and assigning a second cyclic redundancy check to broadcast control channel frames, wherein a mobile station distinguishes between said SPACH and broadcast control channel frames by examining said cyclic redundancy checks, wherein said second cyclic redundancy check is said first cyclic redundancy check inverted.
Claim 3
Dependent Claim
88 words
A mobile station for use in a cellular communication system, comprising: means for receiving signals from said cellular system, wherein a plurality of frames are contained within said signals; and means for distinguishing between different types of frames by examining cyclic redundancy checks assigned to each frame by said cellular system, wherein a first cyclic redundancy check is assigned to SPACH frames and a second cyclic redundancy check is assigned to broadcast control channel frames, and said second cyclic redundancy check is said first cyclic redundancy check inverted.
Claim 4
Dependent Claim
88 words
A mobile station for use in a cellular communication system, comprising: means for receiving signals from said cellular system, wherein a plurality of frames are contained within said signals; and means for distinguishing between different types of frames by examining cyclic redundancy checks assigned to each frame by said cellular system, wherein a first cyclic redundancy check is assigned to SPACH frames and a second cyclic redundancy check is assigned to broadcast control channel frames, and said second cyclic redundancy check is said first cyclic redundancy check inverted.
Claim 5
Dependent Claim
98 words
A cellular communication system with a plurality of mobile stations and at least one base station, comprising: means for assigning different cyclic redundancy checks to different types of frames; means for transmitting a plurality of different frames using a layer 2 protocol to said mobile stations, wherein said mobile stations distinguish between said different frames by examining said cyclic redundancy checks, wherein a first cyclic redundancy check is assigned to SPACH frames and a second cyclic redundancy check is assigned to broadcast control channel frames, and said second cyclic redundancy check is said first cyclic redundancy check inverted.
Claim 6
Dependent Claim
98 words
A cellular communication system with a plurality of mobile stations and at least one base station, comprising: means for assigning different cyclic redundancy checks to different types of frames; means for transmitting a plurality of different frames using a layer 2 protocol to said mobile stations, wherein said mobile stations distinguish between said different frames by examining said cyclic redundancy checks, wherein a first cyclic redundancy check is assigned to SPACH frames and a second cyclic redundancy check is assigned to broadcast control channel frames, and said second cyclic redundancy check is said first cyclic redundancy check inverted.
References Cited (Backward Citations)
EP0321454A2
Cited
US4736371A
Cited
US4797654A
Cited
US4845491A
Cited
US4891813A
Cited
EP0336079A2
Cited
US5012469A
Cited
EP0370829A2
Cited
US5172375A
Cited
US5214789A
Cited
US5153902A
Cited
US5166929A
Cited
US5373506A
Cited
CA2060428A1
Cited
US5483532A
Cited
US5235592A
Cited
US5226040A
Cited
US5353332A
Cited
US5404355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-03-30 | 2001-09-29 | 2002-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-30 | 2005-09-29 | 2006-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-30 | 2009-09-29 | 2010-03-31 | $7700.00 | Window Closed / Lapsed |