[특허]Asynchronous transfer mode data transmission system

Asynchronous transfer mode data transmission system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04J-003/22
출원번호	US-0055883 (1993-05-04)
우선권정보	GB-0012447 (1992-06-11)
발명자 / 주소	Davis Simon P. (Romsey GB2)
출원인 / 주소	Roke Manor Research Limited (Hampshire GB2 03)
인용정보	피인용 횟수 : 116 인용 특허 : 0

초록 ▼

This invention relates to the efficient use of resources in broadband telecommunications networks when handling bursty data traffic. A new technique shapes the data traffic profile to efficiently maximize the bandwidth reservation scheme whilst minimizing data loss and delay. The Fast Bandwidth Reservation Shaper (FBRS) comprises a FIFO buffer with three thresholds (T1-T3), a server, and a Fast Reservation Protocol (FRP) control function which monitors the state of the queue and its associated thresholds, alters the service rate of the server, and handles the FRP protocol. With an empty buffer, a zero or small bandwidth is allocated to the data connection. When the first buffer threshold is reached, the FRP controller attempts to negotiate a small data rate (R1) with the network. As the queue grows to the second threshold (T2), the FRP controller attempts to negotiate a higher data rate (R2), slightly larger than the peak data rate for that traffic. If the buffer completely empties, threshold (T3) will be reached and the FRP controller will clear down the allocated bandwidth to a zero or small bandwidth. The buffer size (L) and T1 and T2 can be designed to meet service parameters by guaranteeing a maximum delay and a maximum data loss probability. By careful choice of the three thresholds and service rates, the FBRS improves the efficiency of fast bandwidth allocation schemes by reducing the peak bit rate and increasing the duration of small data bursts to a guaranteed minimum that is in excess of the round trip delay.

대표청구항 ▼

A data transmission system including a fast bandwidth reservation shaper unit and comprising: a buffer store of predetermined maximum data capacity into which data are loaded at a predetermined rate and from which data are unloaded by a server for onward transmission, the buffer store having a plurality of data capacity thresholds, each of said data capacity thresholds being defined as a predetermined proportion of said maximum data capacity; and means for detecting when the data in the buffer store reach each of said data capacity thresholds and increasing a server rate at which data are unloaded by the server consequent upon such detection so that the server rate is increased in steps as the data capacity thresholds are successively reached, each server rate being thereafter maintained until the buffer store is emptied or until the server rate at which data are unloaded by the server is again increased.

이 특허를 인용한 특허 (116)

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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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