Patent US5479397A successfully refreshed from Google Patents.
US5479397A
Expired / Lapsed
US
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CDMA transmission delay method and apparatus
Assignee: Cellco Partnership
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Filing: 1994-10-27
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Granted: 1995-12-26
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Expires: 2014-10-27
Abstract
Abstract A cellular telephone system is described of the type wherein a plurality of contiguous cells, each having an assigned set of identification codes, are arranged with means for maintaining continuous communication with mobile telephones moving from cell to cell. The system allows multiple access by including means for assigning at least one of the in the assigned set of identification codes to more than one mobile telephone. A unique identification code is assigned to a mobile telephone located in the cell. A signal having a unique identification code is generated for identifying the mobile telephone. The signal is coupled to the zones. A combiner is also provided for combining signals from all of the zones in the cell. A receiver is coupled to the combiner for retrieving the signals having the code. According to another aspect of the invention, the signal coupled to the zones is delayed so that the transmission of the signal among the plurality of antenna sets is delayed by a preselected amount so as to reduce interference caused by successive reception of signals.
Inventors
- 👤 William C. Y. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:56
CPC Classifications
H; H04; H04W; H04W8/00; H04W8/26; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/0491; H04B7/08; H04B7/0802; H04B7/24; H04B7/26; H04W16/00; H04W16/24; H04W16/32; H04B7/022; H04B7/0837; H04W16/02; H04W16/12; H04W16/26; H04W36/00; H04W36/08; H04W36/16; H04W36/18; H04W72/00; H04W72/04; H04W72/044; H04W72/0453; H04W72/0466; H04W88/00; H04W88/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
162 words
In a cellular telephone system wherein a plurality of contiguous cells, each having an assigned set of identification codes, are arranged with handoff means for maintaining continuous communication with a plurality of mobile telephones moving from cell to cell; a cell having a plurality of antenna sets, each set being positioned and having transmitting and receiving means directionally configured to limit propagation of signals substantially to a zone within the boundaries of said cell; means for assigning at least one of the identification codes of the assigned set thereof to at least one mobile telephone located in said cell including means for generating a signal having a unique identification code of the assigned set thereof for identifying said at least one of said mobile telephones; means for coupling the signal to the zones; at least one combiner for combining signals from all the zones in said cell; and a receiver coupled to said combiner for retrieving signals having said unique identification code.
Claim 2
Dependent Claim
162 words
In a cellular telephone system wherein a plurality of contiguous cells, each having an assigned set of identification codes, are arranged with handoff means for maintaining continuous communication with a plurality of mobile telephones moving from cell to cell; a cell having a plurality of antenna sets, each set being positioned and having transmitting and receiving means directionally configured to limit propagation of signals substantially to a zone within the boundaries of said cell; means for assigning at least one of the identification codes of the assigned set thereof to at least one mobile telephone located in said cell including means for generating a signal having a unique identification code of the assigned set thereof for identifying said at least one of said mobile telephones; means for coupling the signal to the zones; at least one combiner for combining signals from all the zones in said cell; and a receiver coupled to said combiner for retrieving signals having said unique identification code.
Claim 3
Dependent Claim
27 words
A cell according to claim 1 wherein said means for coupling comprises means for splitting said signal and means for directing said splitted signal to said zones.
Claim 4
Dependent Claim
52 words
A cell according to claim 2 wherein said means for coupling further comprises time delay means for delaying the transmission of said signal among the plurality of antenna sets by a preselected amount so as to reduce interference caused by successive reception of said signals by said at least one mobile telephone.
Claim 5
Dependent Claim
24 words
A cell according to claim 1 which further comprises means for transmitting a set up channel and means for receiving a set up channel.
Claim 6
Dependent Claim
54 words
A cell according to claim 4 wherein said set up channel transmitting means comprises: a set up transmitter for generating a signal; a power splitter coupled to said set up transmitter for splitting said signal into a plurality of splitted signals; and means for directing said plurality of splitted signals to their corresponding zones.
Claim 7
Dependent Claim
39 words
A cell according to claim 4 wherein said set up channel receiving means comprises at least one combiner for combining signals received by said antenna sets and a set up receiver for recovering signals transmitted by said mobile telephones.
Claim 8
Dependent Claim
40 words
A cell according to claim 1 wherein the number and position of the antenna sets are chosen to allow propagation of signals in all areas of said cell so as to allow comprehensive cell coverage at reduced overall power levels.
Claim 9
Dependent Claim
25 words
A cell according to claim 1 further including reception coupling means for coupling said signals from all the zones in the cell to said combiner.
Claim 10
Dependent Claim
43 words
A cell according to Claim 8 wherein said reception coupling means further comprises time delay means for delaying among each other said signals from all the zones in the cell by a preselected amount so as to reduce interference caused by successive reception.
Claim 11
Dependent Claim
14 words
A cell according to claim 1 wherein said receiver comprises a two-branch diversity receiver.
References Cited (Backward Citations)
US4144409A
Cited
US4144411A
Cited
US4189677A
Cited
US4485486A
Cited
US4644560A
Cited
US4639914A
Cited
US4675863A
Cited
US4783780A
Cited
US4876740A
Cited
US4790000A
Cited
US4704734A
Cited
US4727590A
Cited
EP0265178A2
Cited
US4901307A
Cited
US4759051A
Cited
US4797947A
Cited
EP0295678A2
Cited
US4799253A
Cited
US4775998A
Cited
US4785450A
Cited
US4785450B1
Cited
US4872205A
Cited
US4955082A
Cited
EP0329997A2
Cited
EP0359535A2
Cited
EP0364190A2
Cited
EP0368673A1
Cited
US4932049A
Cited
US5193109A
Cited
US4972456A
Cited
US5101406A
Cited
US5056109A
Cited
US5067147A
Cited
US5101501A
Cited
US5109390A
Cited
US5073900A
Cited
EP0451694A2
Cited
US5103459B1
Cited
US5103459A
Cited
US5150377A
Cited
WO1992010890A1
Cited
US5128959A
Cited
US5243598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |