US5321690A
Expired / Lapsed
US
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Transmitting and receiving system in base station
Assignee: NEC Corp
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Filing: 1993-03-15
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Granted: 1994-06-14
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Expires: 2013-03-15
Abstract
Abstract A transmitting and receiving system in base station in a time-division multiple access digital mobile telephone system has a control signal input/output unit (20) for an external system, a speech signal input/output unit (30) for the external system, a plurality of transmitting/receiving units (10a, 10b, 10c) each including a radio transmitting/receiving circuit (11a, 11b, 11c)and a transmission/reception data processing circuit (12a, 12b, 12c), a control signal bus (40) connecting the control signal input/output unit and the plurality of transmitting/receiving units, and a speech signal bus (50) connecting the speech signal input/output unit and the plurality of transmitting/receiving units. The transmission/reception data processing circuit (12) executes processes of disassembling and assembling to and from a plurality of slots with respect to the control signals for all channels to be multiplexed to a single radio frequency, and of data processings for each slot on the control signals and the speech signals for all channels to be multiplexed to a single radio frequency.
Inventors
- 👤 Toshifumi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:15
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2643
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
259 words
A transmitting and receiving system in a base station in a time division multiple access digital mobile telephone system comprising: a control signal input/output unit for inputting and outputting control signals from and to an external system, a speech signal input/output unit for inputting and outputting speech signals form and to an external system, a first plurality of transmitting/receiving units each including a radio transmitting/receiving circuit and a transmission/reception data processing circuit, said transmission/reception data processing circuit for processing time division multiplexed signals, each of said multiplexed signals being composed of a second plurality of frames, each of said frames being composed of a third plurality of slots, a control signal bus connecting said control signal input/output unit and said plurality of transmitting/receiving units, and a speech signal bus connecting said speech signal input/output unit and said plurality of transmitting/receiving units, wherein said transmission/reception data processing circuit includes: a first data processing means for executing processes of assembling and disassembling to and from a fourth plurality of said slots by modifying said control signals received from said control signal input/output unit to form a fifth plurality of channels to be multiplexed to a single radio frequency; a first 2-port RAM connected to said first data processing means and also to said control signal bus; a second data processing means for executing a data processing on said control signals for each of said slots so that all channels are multiplexed to a single radio frequency; and a second 2-port RAM connected to both said first and second data processing means.
Claim 2
Dependent Claim
259 words
A transmitting and receiving system in a base station in a time division multiple access digital mobile telephone system comprising: a control signal input/output unit for inputting and outputting control signals from and to an external system, a speech signal input/output unit for inputting and outputting speech signals form and to an external system, a first plurality of transmitting/receiving units each including a radio transmitting/receiving circuit and a transmission/reception data processing circuit, said transmission/reception data processing circuit for processing time division multiplexed signals, each of said multiplexed signals being composed of a second plurality of frames, each of said frames being composed of a third plurality of slots, a control signal bus connecting said control signal input/output unit and said plurality of transmitting/receiving units, and a speech signal bus connecting said speech signal input/output unit and said plurality of transmitting/receiving units, wherein said transmission/reception data processing circuit includes: a first data processing means for executing processes of assembling and disassembling to and from a fourth plurality of said slots by modifying said control signals received from said control signal input/output unit to form a fifth plurality of channels to be multiplexed to a single radio frequency; a first 2-port RAM connected to said first data processing means and also to said control signal bus; a second data processing means for executing a data processing on said control signals for each of said slots so that all channels are multiplexed to a single radio frequency; and a second 2-port RAM connected to both said first and second data processing means.
Claim 3
Dependent Claim
35 words
The transmitting and receiving system in a base station according to claim 1, wherein said first data processing means is a universal microprocessor, and said second data processing means is a high speed single-chip microprocessor.
Claim 4
Dependent Claim
161 words
A transmitting and receiving system in a base station in a time division multiple access digital mobile telephone system as set forth in claim 1, wherein in response to a down-coming control signal transmitted from said external system, the control signal is written in said first 2-port RAM by said control signal input/output unit and said control signal bus, said first data processing means adds an address field and a control field-to the control signal, and in the case of an octet number which can not be transmitted by one unit, adds a bit of signal disassembling and assembling after the division into a plurality of units and writes the added signal into said second 2-port RAM, when the control signal has been written in said 2-port RAM, said second data processing means from a predetermined down-coming format, transmits the resultant data in an assigned slot, and executes scrambling and secret processings on the speech signal input from said external system.
Claim 5
Dependent Claim
104 words
A transmitting and receiving system in a base station in a time division multiple access digital mobile telephone system as set forth in claim 1, wherein in response to an up-going signal which includes a control signal having interleaving FEC coding and CRC check information and a speech signal, said second data processing means takes out the control signal portion and executes de-interleaving, FEC coding and CRC check on the taken out speech signal, when the reception slot is assigned to a physical channel for communication, takes out the speech signal portion, and executes scrambling and secret processings on the taken out speech signal.
Claim 6
Dependent Claim
190 words
A transmitting and receiving system in a base station in a time division multiple access digital mobile telephone system comprising: a control signal input/output unit for inputting and outputting control signals from and to an external system, a speech signal input/output unit for inputting and outputting a speech signal from and to the external system, a first plurality of transmitting/receiving units each including a radio transmitting/receiving circuit and a transmission/reception data processing circuit, said transmission/reception data processing circuit for processing time division multiplexed signals, each of said multiplexed signals being composed of a second plurality of frames, each of said frames being composed of third plurality of slots, a control signal bus connecting said control signal input/output unit and said first plurality of transmitting/receiving units, and a speech signal bus connecting said speech signal input/output unit and said first plurality of transmitting/receiving unite, wherein said transmission/reception data processing circuit executes processes of disassembling and assembling a fourth plurality of slots with respect to said control signals received from said control signal input/output to form a fifth plurality of channels so that said channels are multiplexed to a single radio frequency.
Claim 7
Dependent Claim
190 words
A transmitting and receiving system in a base station in a time division multiple access digital mobile telephone system comprising: a control signal input/output unit for inputting and outputting control signals from and to an external system, a speech signal input/output unit for inputting and outputting a speech signal from and to the external system, a first plurality of transmitting/receiving units each including a radio transmitting/receiving circuit and a transmission/reception data processing circuit, said transmission/reception data processing circuit for processing time division multiplexed signals, each of said multiplexed signals being composed of a second plurality of frames, each of said frames being composed of third plurality of slots, a control signal bus connecting said control signal input/output unit and said first plurality of transmitting/receiving units, and a speech signal bus connecting said speech signal input/output unit and said first plurality of transmitting/receiving unite, wherein said transmission/reception data processing circuit executes processes of disassembling and assembling a fourth plurality of slots with respect to said control signals received from said control signal input/output to form a fifth plurality of channels so that said channels are multiplexed to a single radio frequency.
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) | 1997-06-13 | 1997-12-13 | 1998-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-13 | 2001-12-13 | 2002-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-13 | 2005-12-13 | 2006-06-14 | $7700.00 | Window Closed / Lapsed |