Apparatus and method for improvement of transmission quality in a point-to-multipoint radio transmission system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04Q-007/20
H04Q-017/00
출원번호
US-0966989
(1997-11-10)
우선권정보
DE-0046371 (1996-11-09)
발명자
/ 주소
Glauner Martin,DEX
Eckstein Tillmann,DEX
Bollmann Andreas,DEX
출원인 / 주소
Robert Bosch GmbH, DEX
대리인 / 주소
Striker
인용정보
피인용 횟수 :
71인용 특허 :
0
초록▼
The radio transmission system includes at least one base station (BS1,BS2) and several participant stations (T111, . . . ,T222), in which the radio transmission range (Z1,Z2) belonging to each base station (BS1, BS2) is divided into several sectors (S11, . . . ,S22). The radio transmission system pe
The radio transmission system includes at least one base station (BS1,BS2) and several participant stations (T111, . . . ,T222), in which the radio transmission range (Z1,Z2) belonging to each base station (BS1, BS2) is divided into several sectors (S11, . . . ,S22). The radio transmission system performs an automatic interference analysis in which a test channel is established between each participant station (T111, . . . ,T222) and all those sectors (S11, . . . ,S22) which cause interferences with the concerned participant station. A signal path-attenuation value is determined from the transmission power and received power of the test channel for each signal path between the participant stations (T111, . . . ,T222) and sectors (S11, . . . ,S22) and a carrier signal-to-noise ratio is determined for each participant station (T111, . . . ,T222) from all the signal path attenuation values contributing to it. When this carrier signal-to-noise ratio is below a predetermined threshold, a more robust type of modulation is used for the data signal transmission between the concerned participant station (T111, . . . ,T222) and the sector (S11, . . . ,S22) associated with it and/or the transmitted signal carrier is changed to another different frequency channel, for at least the sector (S11, . . . ,S22) which causes the greatest interference.
대표청구항▼
[ We claim:] [1.] A method for improving transmission quality in a point-to-multipoint radio transmission system, said radio transmission system comprising at least one base station (BS1,BS2) and a plurality of participant stations (T111,T112,T121,T211,T221,T222), said at least one base station (BS1
[ We claim:] [1.] A method for improving transmission quality in a point-to-multipoint radio transmission system, said radio transmission system comprising at least one base station (BS1,BS2) and a plurality of participant stations (T111,T112,T121,T211,T221,T222), said at least one base station (BS1,BS2) having an associated radio transmission range (Z1,Z2) comprising at least one sector (S11, . . . , S22) and said at least one base station (BS1,BS2) having a transmitter/receiver unit for said at least one sector (S11, . . . ,S22), so that data transmission takes place between said at least one base station (BS1,BS2) and said participant stations (T111, . . . ,T222) located in the at least one sector (S11, . . . , S22) in which the at least one base station is located, said method comprising the steps of:a) transmitting a test channel between each of said participant stations (T111, . . . ,T222) and said transmitter/receiver units of said at least one sector (S11, . . . ,S22) which cause interference with said participant station (T111, . . . ,T222) to which the test channel is transmitted;b) determining respective signal path-attenuation values from transmitted power and received power of said test channel for each signal path between the participant stations (T111, . . . ,T222) and the transmitter/receiver units of said at least one sector (S11, . . . , S22);c) determining a carrier signal-to-noise ratio for each of said participant stations (T111, . . . ,T222) from said signal path-attenuation values for all of said signal paths contributing to said carrier signal-to-noise ratio;d) when the carrier signal-to-noise ratio is below a predetermined threshold (S1) for one of said participant stations (T111, . . . , T222), changing a modulation of a data signal transmitted between said one of said participant stations and said transmitter/receiver units of said at least one sector (S11, . . . ,S22) in which said one of said participant station is located into a robust modulation and/or changing a transmission signal carrier for said one of said participant stations from one frequency channel to another frequency channel, at least in one of said at least one sector (S11, . . . ,S22) causing a largest amount of said interference for said one of said participant stations (T111, . . . ,T222).
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