US5528668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile communications system and communication channel control method for the same
Assignee: NEC Corp
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Filing: 1994-05-09
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Granted: 1996-06-18
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Expires: 2014-05-09
Abstract
Abstract In the construction of a mobile communications system wherein coder-decoder units for high-efficiency coding which should originally be placed in base stations are arranged in a concentrated manner in a mobile exchange office, a circuit changing-over switch is provided as a part of the communications circuits extending from the base stations to the mobile exchange office and the coder-decoder units in the same office. Consequently, the total number of coder-decoder units is reduced to a number which is smaller than the total number of base stations and which corresponds to the volume of traffic of the entire system. Further, when a communication channel is prepared at the time of a call origination or hand-over, since the setting of a communication channel is completed after synchronization is established between a base station and a coder-decoder unit, interruptions of the service are prevented at an initial stage of setting of a communication channel.
Inventors
- 👤 Makoto Aihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:11
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/18; H04W88/181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
298 words
A mobile communications system to which high-efficiency coding is utilized between a plurality of mobile stations and a mobile exchange office, comprising: a plurality of base stations each provided with at least one communications circuit for providing communications with the mobile exchange office; a circuit switch provided in the mobile exchange office and having a plurality of inputs respectively connected to the corresponding communications circuits of the plurality of base stations, said circuit switch further having a plurality of outputs; a plurality of high efficiency coder-decoder units provided in the mobile exchange office and being respectively connected to a corresponding one of the plurality of outputs of the circuit switch, wherein a number of said plurality of outputs of said circuit switch is equal to a number of said plurality of high efficiency coder-decoder units; and a channel switch having a plurality of inputs respectively connected to said plurality of high efficiency coder-decoder units and having an output providing a connection to another communications party, said channel switch setting a communications channel from one of said mobile stations to the another communications party, wherein when said one of said mobile stations moves from a first region covered by one of said base stations to a second region covered by another of said base stations, said circuit switch provides switching from one of said high efficiency coder-decoder units used for said communications channel to another of said high efficiency coder-decoder units, wherein said one of said mobile stations is provided with a new communications channel after synchronization between said another of said base stations and said another of said high efficiency coder-decoder units has been established, and wherein said number of said plurality of high efficiency coder-decoder units is less than a number of said plurality of base stations.
Claim 2
Dependent Claim
298 words
A mobile communications system to which high-efficiency coding is utilized between a plurality of mobile stations and a mobile exchange office, comprising: a plurality of base stations each provided with at least one communications circuit for providing communications with the mobile exchange office; a circuit switch provided in the mobile exchange office and having a plurality of inputs respectively connected to the corresponding communications circuits of the plurality of base stations, said circuit switch further having a plurality of outputs; a plurality of high efficiency coder-decoder units provided in the mobile exchange office and being respectively connected to a corresponding one of the plurality of outputs of the circuit switch, wherein a number of said plurality of outputs of said circuit switch is equal to a number of said plurality of high efficiency coder-decoder units; and a channel switch having a plurality of inputs respectively connected to said plurality of high efficiency coder-decoder units and having an output providing a connection to another communications party, said channel switch setting a communications channel from one of said mobile stations to the another communications party, wherein when said one of said mobile stations moves from a first region covered by one of said base stations to a second region covered by another of said base stations, said circuit switch provides switching from one of said high efficiency coder-decoder units used for said communications channel to another of said high efficiency coder-decoder units, wherein said one of said mobile stations is provided with a new communications channel after synchronization between said another of said base stations and said another of said high efficiency coder-decoder units has been established, and wherein said number of said plurality of high efficiency coder-decoder units is less than a number of said plurality of base stations.
References Cited (Backward Citations)
US5119375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-06-18 | 1999-12-18 | 2000-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-18 | 2003-12-18 | 2004-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-18 | 2007-12-18 | 2008-06-18 | $7700.00 | Window Closed / Lapsed |