Title :
Bandwidth allocation for real-time communication with LTPB protocol
Author :
Huagang, Xiong ; Zhiqiang, Luo ; Qishan, Zhang
Author_Institution :
Dept. of Electron. Eng., Beijing Univ. of Aeronaut. & Astronaut., China
Abstract :
The LTPB (Linear Token Passing Bus) protocol is a timed token protocol which has been designed by the SAE (Society of Automotive Engineers) as a LAN standard (AS4074) to support real-time communication in mission-critical systems. This paper studies the real-time characteristics with LTPB network. A bandwidth allocation scheme is proposed based on the traffic load balance of each node. The necessary and sufficient conditions of guaranteeing message deadlines under the allocation scheme has been derived, which can be used to predict whether there is any missed message deadline for any given message set. The bound of the Worst Case Achievable Utilization for the scheme has also been derived and formally proved, which can be used in system design period when exact knowledge of the message set is not available
Keywords :
aircraft communication; fault tolerant computing; frequency allocation; local area networks; military avionics; protocols; real-time systems; telecommunication standards; Bandwidth allocation; LAN standard; LTPB protocol; Linear Token Passing Bus; Society of Automotive Engineers; Worst Case Achievable Utilization; allocation scheme; message deadlines; missed message deadline; mission-critical systems; real-time characteristics; real-time communication; system design period; timed token protocol; traffic load balance; Automotive engineering; Channel allocation; Communication standards; Design engineering; Local area networks; Mission critical systems; Protocols; Real time systems; Sufficient conditions; Telecommunication traffic;
Conference_Titel :
Aerospace and Electronics Conference, 1997. NAECON 1997., Proceedings of the IEEE 1997 National
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-3725-5
DOI :
10.1109/NAECON.1997.622751
