US5838770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable telephone system
Assignee: Hitachi Ltd
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Filing: 1996-08-08
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Granted: 1998-11-17
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Expires: 2016-08-08
Abstract
Abstract Duplicate optical fibers connect between a base station controller and a radio base station for each route. The duplicate optical fiber is connected to each of the radio base stations for each route through a star coupler. The radio base stations are arranged in each of areas so that the radio base stations for different routes are arranged adjacent to each other.
Inventors
- 👤 Yutaka Fukushima
- 👤 Tetsuo Takemura
- 👤 Shinichi Iwaki
- 👤 Mitsuyoshi Hashida
- 👤 Masao Wanami
- 👤 Isao Shimbo
- 👤 Mitsuhiro Wada
- 👤 Hirofumi Udaki
- 👤 Yoshihiro Kondo
- 👤 Yoshinobu Yamamoto
- 👤 Arata Nakagoshi
- 👤 Kouichi Ohta
- 👤 Hiroshi Kuwahara
- 👤 Yumiko Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:24
CPC Classifications
H; H04; H04W; H04W24/00; H04W24/04; H04B; H04B10/00; H04B10/25; H04B10/2575; H04B10/25752; H04B10/25753; H04B10/25754; H04W84/00; H04W84/02; H04W84/04; H04W84/042; H04W24/06; H04W4/00; H04W4/16; H04W60/00; H04W60/04; H04W64/00; H04W64/006; H04W88/00; H04W88/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
A portable telephone system, comprising: a switching system; a plurality of radio base stations, each of said radio base stations respectively connected to said switching system through transmission paths in a respective area; and a portable telephone connected to said a respective one of said radio base stations through radio transmission paths, wherein said respective one of said radio base stations holds calls in the order of reception thereof, when the calls are received when said portable telephone is currently in use.
Claim 2
Dependent Claim
82 words
A portable telephone system, comprising: a switching system; a plurality of radio base stations, each of said radio base stations respectively connected to said switching system through transmission paths in a respective area; and a portable telephone connected to said a respective one of said radio base stations through radio transmission paths, wherein said respective one of said radio base stations holds calls in the order of reception thereof, when the calls are received when said portable telephone is currently in use.
Claim 3
Dependent Claim
126 words
A portable telephone system, comprising: a switching system; a plurality of radio base stations, each of said radio base stations respectively connected to said switching system through transmission paths in a respective area; and a portable telephone connected to said a respective one of said radio base stations through radio transmission paths, wherein, when a plurality of calls for establishing communication between said portable telephone and another terminal are received at said respective one of said radio base stations in a busy state, said respective one of said radio base stations holds said calls in the order of reception thereof, and establishes communication between said portable telephone and said another terminal in the order in which said calls were received when the busy state is cleared.
Claim 4
Dependent Claim
126 words
A portable telephone system, comprising: a switching system; a plurality of radio base stations, each of said radio base stations respectively connected to said switching system through transmission paths in a respective area; and a portable telephone connected to said a respective one of said radio base stations through radio transmission paths, wherein, when a plurality of calls for establishing communication between said portable telephone and another terminal are received at said respective one of said radio base stations in a busy state, said respective one of said radio base stations holds said calls in the order of reception thereof, and establishes communication between said portable telephone and said another terminal in the order in which said calls were received when the busy state is cleared.
Claim 5
Dependent Claim
166 words
A portable telephone system, comprising: a switching system; a plurality of radio base stations, each of said radio base stations respectively connected to said switching system through transmission paths in a respective area; and a portable telephone connected to said a respective one of said radio base stations through radio transmission paths, wherein, when a plurality of calls for establishing communication between said portable telephone and another terminal are received at said respective one of said radio base stations in a busy state, said respective one of said radio base stations holds said calls in the order of reception thereof, and informs a user of said portable telephone when communication between said portable telephone and said another terminal can be established as the busy state of said respective one of said radio base stations is cleared, said communication between said portable telephone and said another terminal being established in the order in which said calls are received at said respective one of said radio base stations.
Claim 6
Dependent Claim
166 words
A portable telephone system, comprising: a switching system; a plurality of radio base stations, each of said radio base stations respectively connected to said switching system through transmission paths in a respective area; and a portable telephone connected to said a respective one of said radio base stations through radio transmission paths, wherein, when a plurality of calls for establishing communication between said portable telephone and another terminal are received at said respective one of said radio base stations in a busy state, said respective one of said radio base stations holds said calls in the order of reception thereof, and informs a user of said portable telephone when communication between said portable telephone and said another terminal can be established as the busy state of said respective one of said radio base stations is cleared, said communication between said portable telephone and said another terminal being established in the order in which said calls are received at said respective one of said radio base stations.
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) | 2001-11-16 | 2002-05-18 | 2002-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-16 | 2006-05-18 | 2006-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-16 | 2010-05-18 | 2010-11-17 | $7700.00 | Window Closed / Lapsed |