US5818918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Personal handy phone system
Assignee: NEC Platforms Ltd
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Filing: 1996-05-31
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Granted: 1998-10-06
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Expires: 2016-05-31
Abstract
Abstract In a personal handy phone system, a private PHS base station is communicable with both a private PHS terminal and a public PHS terminal. The private PHS base station intermittently transmits and receives a first control signal having a first frequency in a predetermined cycle and at a predetermined interval to communicate with the private PHS terminal. The private PHS base station intermittently transmits and receives a second control signal having a second frequency different from the first frequency in the predetermined cycle and at the predetermined interval to communicate with the public PHS terminal when the first control signal is neither transmitted nor received.
Inventors
- 👤 Shigeo Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:52
CPC Classifications
H; H04; H04W; H04W84/00; H04W84/02; H04W84/10; H04W84/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A personal handy phone system comprising a private branch exchange network including a private branch exchange connected to a public PHS network and a private PHS base station connected to said private branch exchange, wherein said private PHS base station comprises: first transmit/receive means for intermittently transmitting and receiving a first control signal having a first frequency in a predetermined cycle and at a predetermined interval; and second transmit/receive means for intermittently transmitting and receiving a second control signal having a second frequency different from said first frequency in said predetermined cycle and at said predetermined interval when said first control signal is neither transmitted nor received.
Claim 2
Dependent Claim
107 words
A personal handy phone system comprising a private branch exchange network including a private branch exchange connected to a public PHS network and a private PHS base station connected to said private branch exchange, wherein said private PHS base station comprises: first transmit/receive means for intermittently transmitting and receiving a first control signal having a first frequency in a predetermined cycle and at a predetermined interval; and second transmit/receive means for intermittently transmitting and receiving a second control signal having a second frequency different from said first frequency in said predetermined cycle and at said predetermined interval when said first control signal is neither transmitted nor received.
Claim 3
Dependent Claim
69 words
A personal handy phone system as claimed in claim 1, wherein said private PHS base station further comprises: judging means for judging whether a connection request in each of said first and said second control signals received by said private PHS base station is directed to said private branch exchange or said public PHS network; and informing means for informing the result of judgment to said private branch exchange.
Claim 4
Independent Claim
117 words
A method of controlling a personal handy phone system comprising a private branch exchange network including a private branch exchange connected to a public PHS network and a private PHS base station connected to said private branch exchange, said method comprising the step of making said private PHS base station intermittently transmit and receive a first control signal having a first frequency in a predetermined cycle and at a predetermined interval, and the step of making said private PHS base station intermittently transmit and receive a second control signal having a second frequency different from said first frequency in said predetermined cycle and at said predetermined interval when said first control signal is neither transmitted nor received.
Claim 5
Independent Claim
117 words
A method of controlling a personal handy phone system comprising a private branch exchange network including a private branch exchange connected to a public PHS network and a private PHS base station connected to said private branch exchange, said method comprising the step of making said private PHS base station intermittently transmit and receive a first control signal having a first frequency in a predetermined cycle and at a predetermined interval, and the step of making said private PHS base station intermittently transmit and receive a second control signal having a second frequency different from said first frequency in said predetermined cycle and at said predetermined interval when said first control signal is neither transmitted nor received.
Claim 6
Dependent Claim
72 words
A method of controlling a personal handy phone system as claimed in claim 3, said method further comprising the steps of: making said private PHS base station judge whether a connection request in each of said first and said second control signals received by said private PHS base station is directed to said private branch exchange or said public PHS network; and informing the result of judgment to said private branch exchange.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-10-05 | 2002-04-06 | 2002-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-05 | 2006-04-06 | 2006-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-05 | 2010-04-06 | 2010-10-06 | $7700.00 | Window Closed / Lapsed |