[특허]Frequency agile sharing technology (FAST) for a personal communications service system

Frequency agile sharing technology (FAST) for a personal communications service system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-007/00
출원번호	US-0874370 (1992-04-27)
발명자 / 주소	Jones J. Barclay (Washington DC)
출원인 / 주소	American PCS L.P. (Bethesda MD 02)
인용정보	피인용 횟수 : 112 인용 특허 : 0

초록 ▼

A frequency agile sharing technology (FAST) system for controlling frequent usage in a communications system is disclosed. Specifically, a frequency agile sharing technology system of controlling frequency usage and eliminating interference for use with a Personal Communications Service (PCS) System is described. The frequency control system allows PCS systems to coexist in the same frequency band as Private Operational Fixed Microwave Service (POFS) systems without mutual interference. This system also controls frequency usage within a PCS system to eliminate interference from within the PCS system. This interference elimination system combines theoretical radio frequency interference analysis with measurements of actual frequency usage and allows for efficient and coordinated dynamic frequency allocation planning and management. To control frequency assignment and eliminate interference, the system employs several mechanisms including an intersystem interference analysis, an intrasystem interference analysis, a channel use verification (CUV) procedure, and a measured data analysis (MDA). These mechanisms are performed by a centralized controller, channel utilization controller (CUC), comprised of interference analysis/frequency planning computer programs with supporting data bases and data communication links. The system and method described allows for PCS frequency use around existing microwave users and can be readily adapted for use in any area and most efficiently make use of the available communications spectrum in that area. The system protects existing microwave users from interference while providing high quality PCS to subscribers utilizing small, low power and lightweight handsets in the same frequency band.

대표청구항 ▼

A personal communications system for providing a radio communication service in a dynamic communications environment in which communication transmissions from at least one other communications system occur, the personal communications system comprising: at least one base station; a plurality of subscriber units, at least some of which are mobile or portable; a means for communicating between the base station and each of the subscriber units at radio frequencies; and a centrally located processing means for controlling the frequency of transmissions used by the communicating means, linked electronically to each base station, the processing means comprising: a means for calculating theoretical intersystem interference to determine which frequencies are used for the other communications transmissions and which frequencies are available for use by the base station and which frequencies are available for use by the plurality of subscriber units, wherein the theoretical calculation of intersystem interference predicts available frequencies to prevent unacceptable interference, the predictions based on calculations of interference caused by the base stations and the subscriber units on transmissions of the other communications systems and interference caused by the other communications systems on transmissions of the base .stations and the subscriber units; a verification testing means for measuring signal strength of all frequencies being used by the other communication transmissions; and a means for comparing the results of the theoretical intersystem interference test with the signal strengths determined by the verification test to determine frequencies available for use and accumulating the frequencies into an available channel list which is used to control the frequency of transmission of the base station whereby the system adapts to a changing RF environment and shares frequencies allocated to the other communications system within the same region through the provision of centralized control.

이 특허를 인용한 특허 (112)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Frequency agile sharing technology (FAST) for a personal communications service system 원문보기

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Frequency agile sharing technology (FAST) for a personal communications service system 원문보기

초록 ▼

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연구과제 타임라인

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