Patent US5159596A successfully refreshed from Google Patents.
US5159596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile communication system
Assignee: Iwatsu Electric Co Ltd
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Filing: 1990-06-26
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Granted: 1992-10-27
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Expires: 2010-06-26
Abstract
Abstract A mobile communication system based on a time division communication system comprising: mobile radio units for transmitting and receiving time-compressed and segmented signals by a radio channel allocated to time slots; radio base stations to which a communicable time slot is previously allocated so as to communicate using only a specific time slot of those time slots of the radio channel when the mobile radio units moves across one of service areas that are disposed so as to overlap at least partially with one another, the time slot allocated to one radio base station being different from that allocated to another radio base station; and gateway exchange units for exchanging communications between the mobile radio units and the radio base stations and for connecting the radio base stations to a public switched telephone network.
Inventors
- 👤 Sadao Itoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:40
CPC Classifications
H; H04; H04W; H04W74/00; H04W74/08; H04W74/0833; H04W74/0841; H04W74/085; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2643; H04W28/00; H04W28/02; H04W28/06; H04W28/16; H04W36/00; H04W36/08; H04W72/00; H04W72/04; H04W72/044; H04W72/0446; H04W88/00; H04W88/08; H04W88/16; H04W92/00; H04W92/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
163 words
A mobile communication system using a time division communication system, comprising: mobile radio means for transmitting and receiving timecompressed and segmented signals through a radio channel allocated to a plurality of time slots; a plurality of radio base stations each having a service area which is disposed to overlap at least partially with one another, each of said radio base stations being provided with a predetermined communicable time slot previously allocated thereto so as to communicate with said mobile radio means using only a specific time slot of said time slots of said radio channel when said mobile radio means moves across one of said service areas, said predetermined communicable time slot allocated to one of said radio base stations being different from that allocated to the other radio base stations adjacent thereto; and gateway exchange means for exchanging communications between said mobile radio means and said radio base stations and for connecting said radio base stations to a public switched telephone network.
Claim 2
Dependent Claim
163 words
A mobile communication system using a time division communication system, comprising: mobile radio means for transmitting and receiving timecompressed and segmented signals through a radio channel allocated to a plurality of time slots; a plurality of radio base stations each having a service area which is disposed to overlap at least partially with one another, each of said radio base stations being provided with a predetermined communicable time slot previously allocated thereto so as to communicate with said mobile radio means using only a specific time slot of said time slots of said radio channel when said mobile radio means moves across one of said service areas, said predetermined communicable time slot allocated to one of said radio base stations being different from that allocated to the other radio base stations adjacent thereto; and gateway exchange means for exchanging communications between said mobile radio means and said radio base stations and for connecting said radio base stations to a public switched telephone network.
Claim 3
Dependent Claim
33 words
A mobile communication system according to claim 1, in which said gateway exchange means generates a synchronous signal, and said time slots transmitted through said radio channel are synchronized with said synchronous signal.
Claim 4
Dependent Claim
30 words
A mobile communication system according to claim 1, in which said radio base station sends a radio signal by using only the time slot allocated to said radio base station.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-27 | 1996-04-27 | 1996-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-27 | 2000-04-27 | 2000-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-27 | 2004-04-27 | 2004-10-27 | $7700.00 | Window Closed / Lapsed |