IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0435910
(1999-11-08)
|
우선권정보 |
FI-19982432 (1998-11-09) |
발명자
/ 주소 |
- Lehtinen, Otto-Aleksanteri
- Toskala, Antti
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
36 인용 특허 :
6 |
초록
▼
The timing of frames associated with a certain first communication connection (301) and allocated for measurement and reception of signalling (302, 303) external to said first communication connection is defined in a cellular radio system. Transmission associated with communication connections is es
The timing of frames associated with a certain first communication connection (301) and allocated for measurement and reception of signalling (302, 303) external to said first communication connection is defined in a cellular radio system. Transmission associated with communication connections is essentially continuous and consists of consecutive frames. Measurement and reception of signalling external to a communication connection necessitates an interruption in the otherwise continuous transmission associated with the communication connection. According to the invention, there is established (701) knowledge that indicates at least one future occurrence of signalling external to the first communication connection. Further there is identified (702), on the basis of said established knowledge, a future frame (305, 307, 308, 310) associated with the first communication connection that will coincide in time (304, 306, 309) with said future occurrence of signalling external to the first communication connection. The identified future frame will be defined as a frame allocated for measurement and reception of signalling external to the first communication connection.
대표청구항
▼
The timing of frames associated with a certain first communication connection (301) and allocated for measurement and reception of signalling (302, 303) external to said first communication connection is defined in a cellular radio system. Transmission associated with communication connections is es
The timing of frames associated with a certain first communication connection (301) and allocated for measurement and reception of signalling (302, 303) external to said first communication connection is defined in a cellular radio system. Transmission associated with communication connections is essentially continuous and consists of consecutive frames. Measurement and reception of signalling external to a communication connection necessitates an interruption in the otherwise continuous transmission associated with the communication connection. According to the invention, there is established (701) knowledge that indicates at least one future occurrence of signalling external to the first communication connection. Further there is identified (702), on the basis of said established knowledge, a future frame (305, 307, 308, 310) associated with the first communication connection that will coincide in time (304, 306, 309) with said future occurrence of signalling external to the first communication connection. The identified future frame will be defined as a frame allocated for measurement and reception of signalling external to the first communication connection. when said collision control signal is repeatedly transmitted to one of said requesting mobile stations related to said transmission count. 5. The mobile satellite communication system according to claim 1, wherein said control unit transmits said collision control signal including said PE signal for one of said requesting mobile stations determined based on said maximum allowable transmission reservation count and said transmission reservation count in response to said short burst transmissions requesting long burst transmissions. 6. The mobile satellite communication system according to claim 1, wherein when said transmission reservation count is smaller than said maximum allowable transmission reservation count, said control unit transmits said collision control signal, including said PE signal, for one of said requesting mobile stations repeatedly for a number of times equal to said transmission count. 7. The mobile satellite communication system according to claim 1, wherein when said transmission reservation count is equal to or larger than said maximum allowable transmission reservation count, said control unit transmits said collision control signal for each of said requesting mobile stations circularly, rotating through said requesting mobile stations according to said identifier for each of said requesting mobile stations stored in said partial echo (PE) buffer, during consecutive transmission time units. 8. The mobile satellite communication system according to claim 1, wherein each of said plurality of mobile stations includes a corresponding timer which places a corresponding mobile station into a time-out state in a predetermined number of transmission time units, and wherein an allowable number of said requesting mobile stations is determined based on a communication delay time between said base station apparatus and said plurality of mobile stations and based on said predetermined number of transmission time units of said timer. 9. A method of transmitting data from each of a plurality of mobile stations to a base station apparatus through a communication satellite in a mobile satellite communication system, wherein transmission from said base station apparatus to said plurality of mobile stations is performed using a single downward control channel and transmission from said plurality of mobile stations to said base station apparatus is performed using a single upward control channel, said method comprising the steps of: performing a requesting short burst transmission requesting long burst transmissions from each of requesting ones of said plurality of mobile stations to said base station apparatus; updating a transmission reservation count and a transmission count in response to said requesting short burst transmission; transmitting a collision control signal including a partial echo (PE) signal from said base station apparatus to said requesting mobile stations for one or more long burst transmissions, a number of said long burst transmissions being stored as a transmission count for each of said requesting mobile stations, based on a maximum allowable transmission reservation count and based on said transmission reservation count in response to said requesting short burst transmission, said PE signal including an identifier of one of said requesting mobile stations; and transferring said data from each of said requesting mobile stations to said base station apparatus according to the collision control signal. 10. The method according to claim 9, further comprising the step of storing a maximum allowable transmission reservation count, and wherein said transmitting step includes: reading out said maximum allowable transmission reservation count; and transmitting said collision control signal based on the maximum allowable transmission reservation count and based on said transmission reservation count. 11. The method according to claim 9, wherein said transmitting step includes: decreme nting the transmission count for one of said requesting mobile stations by "1" each time the collision control signal is transmitted for the one of said requesting mobile stations. 12. The method according to claim 9, wherein said transmitting step includes: decrementing said transmission reservation count by "1" each time said collision control signal is transmitted for one of said requesting mobile stations. 13. The method according to claim 9, wherein said transmitting step includes: transmitting said collision control signal including said PE signal for one of said requesting mobile stations based on said maximum allowable transmission reservation count and based on said transmission reservation count in response to said requesting short burst transmission. 14. The method according to claim 9, wherein said transmitting step includes: transmitting said collision control signal including said PE signal for one of said requesting mobile stations repeatedly for a number of times equal to said transmission count when said transmission reservation count is less than said maximum allowable transmission reservation count. 15. The method according to claim 9, wherein said transmitting step includes: transmitting said collision control signal for each of said requesting mobile stations circularly, rotating through said requesting mobile stations according to said identifier for each of said requesting mobile stations stored in said partial echo (PE) buffer, during consecutive transmission time units when said transmission reservation count is equal to or larger than said maximum allowable transmission reservation count. 16. The method according to claim 9, wherein each of said plurality of mobile stations includes a corresponding timer which places a corresponding mobile station into a time-out state in a predetermined number of transmission time units, and wherein an allowable number of said requesting mobile stations is determined based on a communication delay time between said base station apparatus and said plurality of mobile stations and based on said predetermined number of transmission time units of said timer.
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