Digital radio communication system with efficient audio and non-audio data transmission
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04J-003/12
출원번호
US-0585181
(1996-01-11)
발명자
/ 주소
Tatsumi Akinori,JPX
Suzuki Mitsuhiro,JPX
Shimazu Mikio,JPX
Horii Seiji,JPX
출원인 / 주소
Matsushita Electric Ind., JPX
대리인 / 주소
Price, Gess & Ubell
인용정보
피인용 횟수 :
62인용 특허 :
0
초록▼
In a radio communication system for performing digital radio communications by using time-division multiplexed time slots, a first personal station receives its user's speech through the microphone, converts it into audio data, and transmits them on time slots to a second personal station. On the ot
In a radio communication system for performing digital radio communications by using time-division multiplexed time slots, a first personal station receives its user's speech through the microphone, converts it into audio data, and transmits them on time slots to a second personal station. On the other hand, the first personal station receives non-audio data from the data processor connected with the second personal station and stores. When the audio data amount inputted to the first personal station in a unit time period is lower than a threshold and the communications between the first personal station and the second personal station are put in a silence condition, the first personal station transmits non-audio data on times slots to the second personal station. When the communications return to a sound condition, audio data transmission is restored. Whether each time slot carries audio data or non-audio data is designated by an identifier which is written in a predetermined field of each time slot.
대표청구항▼
[ What is claimed is:] [23.] A radio communication system for transmitting audio data and non-audio data between a transmitter personal station and a receiver personal station, the transmitter personal station informing the receiver personal station of an occurrence of a silence condition in communi
[ What is claimed is:] [23.] A radio communication system for transmitting audio data and non-audio data between a transmitter personal station and a receiver personal station, the transmitter personal station informing the receiver personal station of an occurrence of a silence condition in communications before transmitting non-audio data to the receiver personal station, or informing the receiver personal station of an occurrence of a sound condition in communications before transmitting audio data to the receiver personal station, the audio data and the non-audio data being transmitted on time slots which have been time-division multiplexed, each of the transmitter personal station and the receiver personal station comprising:a transmission/reception means for transmitting and receiving time slots in a unit time to and from other personal station, each of the time slots including a data field in which audio data and non-audio data are written, and a control field in which control information is written;an audio data conversion means provided with a microphone for receiving speech through the microphone and converting the speech into audio data;a non-audio data holding means provided with an input terminal connected with an output terminal of a data processor, said non-audio data holding means receiving non-audio data from the data processor, and holding the non-audio data received;an audio data amount detection means for detecting whether an amount of audio data to be produced per unit time by said audio data conversion means is lower or higher than a predetermined threshold;a switch command write means for, when the amount of audio data to be produced by said audio data conversion means has been detected to be lower than a predetermined threshold, fetching a predetermined amount of non-audio data from said non-audio data holding means, writing the non-audio data fetched to the data field of a first time slot, further writing a non-audio data transmission switch command which indicates that audio data transmission has been switched to non-audio data transmission to the control field of the first time slot, and making said transmission/reception means transmit the first time slot, and when the amount of audio data to be produced by said audio data conversion means has been detected to be higher than a predetermined threshold, writing the audio data obtained from said audio data conversion means to the data field of a second time slot, further writing an audio data transmission command which indicates that non-audio data transmission is switched to audio data transmission to the control field of the second time slot, and making said transmission/reception means transmit the second time slot;a transmission/reception control means for making said switch command write means write one of audio data and non-audio data, when a time slot whose data field includes an acknowledgement command which indicates that a reception of non-audio data has been acknowledged has been received from the other personal station;a speech restoration means provided with a speaker for restoring speech from audio data;the flag being on when the communications are in the silence condition and being off when the communications are in the sound condition; anda flag storage means for storing a flag, which indicates a non-audio data reception mode for receiving non-audio data when it is on, and indicates an audio data reception mode for receiving audio data when it is off;a flag setting means for detecting whether the control field of a third time slot received from the other personal station includes a non-audio data transmission switch command or an audio data transmission switch command, and setting the flag at on when the control field of the third time slot includes the non-audio data transmission switch command and setting the flag at off when the control field of the third time slot includes the audio data transmission switch command;a confirmation command application means for writing a non-audio data reception acknowledgement command which indicates that a reception of non-audio data has been acknowledged to the control field of a fourth time slot, and making said transmission/reception means transmit the fourth time slot in response to the non-audio data reception mode, and for writing an audio data reception acknowledgement command which indicates that a reception of audio data has been acknowledged to the control field of a fifth time slot, and making said transmission/reception means transmit the fifth time slot in response to the audio data reception mode; anda distribution means provided with an output terminal connected with an input terminal of the data processor for, in the audio data reception mode, fetching audio data from the data field of a time slot received by said transmission/reception means and outputting the audio data fetched to said speech restoration means, and in the non-audio data reception mode, fetching non-audio data from the data field of a time slot received from the other personal station and outputting the non-audio data fetched to the data processor.
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