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Audio Signal Processing

Time-division-multidirectional-multiplex-communication-system-capable-of-using-message-area-in-radio-burst-signals-divided-into-a-plurality-of-areas

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Time-division multidirectional multiplex communication system capable of using message area in radio burst signals divided into a plurality of areas

Details

Inventors: Kimura, Atsushi;
Assignee: NEC Corporation (Tokyo, JP)
Primary Examiner: Nguyen; Chau
Assistant Examiner:
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak & Seas, PLLC

A master station and at least one slave station are connected by radio channels. Each slave station transmits data to the master station by time division multiple access. A first circuit equally divides a prescribed area into at least two sub-areas. The prescribed are is defined in a burst signal for transmitting data from each slave station to the master station, the prescribed area being provided for an arrangement of message signals which are sent from at least one terminal connected to the slave station. The first circuit also arranges a message signal in each sub-area. A second circuit generates a burst signal in which at least a control signal and a channel quality monitoring signal are arranged. The control signal and the channel quality monitoring signal are generated in the area peripheral to each sub-area in which a message signal is arranged. The prescribed area in the burst signal may be an area corresponding to a data quantity of 64 kbps in transmission speed. The data quantity of the message signal arranged in that area corresponds to data of 32 kbps, 16 kbps or 8 kbps in transmission speed.

DETAILED DESCRIPTION An object of the present invention is to provide a time division multidirectional multiplex communication system which makes it possible to divide a message area in one radio burst signal of a frame for time division multiplex connection into two or more areas.
Another object of the invention is to provide a time division multidirectional multiplex communication system which makes it possible to increase the number of subscribers who can be served by reducing a data quantity of message signals without altering the frame length and configuration of radio burst signals.
Still another object of the invention is to provide a time division multidirectional multiplex communication system which makes it possible, without having to alter the frame composition preset for the purpose of communicating data of a prescribed transmission speed, to improve the efficiency of accommodating subscribers to the communication system by having slave stations transmit data of lower speeds than the prescribed transmission speed to the master station.
Yet another object of the invention is to provide a time division multidirectional multiplex communication system which makes it possible to improve the efficiency of allocating radio burst signals by allowing message signals of different transmission speeds to be present in mixture with each other in a prescribed message area in a preset radio burst signal.
In order to achieve the aforementioned objective, in a time division multidirectional multiplex communication system according to the invention, a master station and at least one slave stations are connected by radio channels, and each slave station transmits data to the master station by time division multiple access.
First means equally divides a prescribed area, which is defined in a burst signal for use in transmission from each slave station to the master station and intended for arrangement of message signals sent from at least one terminal connected to the slave station, into at least two sub-areas, and arranges a message signal in each sub-area

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