IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0241207
(1994-05-10)
|
| 우선권정보 |
IT-0000335 (1993-05-14) |
|
발명자
/ 주소 |
- Sereno Daniele (Turin ITX) Hellwig Karl (Nrnberg DEX) Berruto Ermanno (Turin ITX)
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| 출원인 / 주소 |
- CSELT - Centro Studi e Laboratori Telecomunicazioni SpA (Turin NY ITX 03) U.S. Philips Corporation (New York NY 02)
|
| 인용정보 |
피인용 횟수 :
107 인용 특허 :
0 |
초록
▼
In a radio communication system, in particular a mobile communication system, variable-rate information flows originating from different sources (CV1, CS1; CV2, CS2) and relative to a same communication are transmitted on a same radio channel. Each mobile station (M1 . . . Mh) and the fixed part (B1
In a radio communication system, in particular a mobile communication system, variable-rate information flows originating from different sources (CV1, CS1; CV2, CS2) and relative to a same communication are transmitted on a same radio channel. Each mobile station (M1 . . . Mh) and the fixed part (B1 . . . Bn; RNC) of the system comprise a unit for the control of the variable-rate transmission, which dynamically allocates the available bits to the different streams by taking into account the needs of the sources (CV1, CS1; CV2, CS2), the conditions of the channel (6) and the system occupancy. (FIG. 1).
대표청구항
▼
A communication system including at least two stations (M1 . . . Mh; RNC; B1 . . . Bn) connected via a radio channel and including: sources (CV1, CS1; CV2, CS2) of variable-rate information streams relative to a common communication that must be combined on said radio channel 16), each source being
A communication system including at least two stations (M1 . . . Mh; RNC; B1 . . . Bn) connected via a radio channel and including: sources (CV1, CS1; CV2, CS2) of variable-rate information streams relative to a common communication that must be combined on said radio channel 16), each source being able to operate, in a given time interval, with a rate (r1, r2) chosen within a respective set of rates; means (CC1, CC2; CC3, CC4) to introduce into each stream, in said time interval, a redundancy chosen from a set of possible redundancy schemes, each of which causes an increment (r3, r4) in the rate of the stream emitted by the source; means (MX1, MX2) for combining the individual streams into a single stream to be transmitted on the channel (6); management units (MM, BM, RNCM for the stations; a variable-rate stream control unit (UC1, UC2) for each station which, for each communication receives from the sources (CV1, CS1; CV2, CC2) information on source needs in terms of the emission rate which is best suited to the characteristics of the respective information stream in that interval, receives from the management units (MM, RNCM) information on the needs of the channel (6) and the entire system in that interval, expressed in terms of redundancy and respectively of transmission rate on the channel, determines a particular source rate and a particular redundancy for each flow, and provides the sources CV1, CS1; CV2, CS2) and the means (CC1, CC2; CC3, CC4) for redundancy introduction with commands for the choice of that particular source rate and redundancy, the rates and redundancies chosen being those which guarantee the attainment of a predetermined quality of the particular communication and of the service offered by the system, the rates and redundancies chosen being those which satisfy the source and channel needs in that interval, if the total rate (rtot) of the stream resulting from the combination, expressed as the sum of the emission rates of the streams and the rate increments caused by the redundancies, does not exceed a rate (r5) determined by the system conditions, while otherwise the rates and redundancies are chosen so as to minimize a total cost of the communication and given by the sum of the costs resulting from the individual needs.
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