On Guaranteed Delivery of Time-Critical Messages in DQDB
نویسندگان
چکیده
This paper addresses the problem of guaranteed delivery of messages with hard deadlines in a DQDB network. We present a cyclic reservation scheme capable of allocating bandwidth with any arbitrary granular-ity and provide deterministic delay guarantees. We propose two implementations of the allocation scheme within the framework of DQDB medium access control protocol. The proposed implementations are very simple , incur minimal overhead and require only minor changes in the adopted standard.
منابع مشابه
On Slot Allocation for Time-Constrained Messages in DQDB Networks
Ching-Chih Hany, Chao-Ju Houz, and Kang G. Shiny yReal-Time Computing Laboratory zComputer Engineering Division Dept. of Elec. Eng. and Comput. Sci. Dept. of Elec. and Comput. Eng. The University of Michigan The University of Wisconsin Ann Arbor, MI 48109 Madison, WI 53706 fcchan,[email protected] [email protected] Abstract This paper addresses the issue of guaranteeing the timely delivery...
متن کاملDynamic Real-Time Channel Setup and Tear-Down in DQDB Networks
Networks Chao-Ju Hou and Kar Shun Tsoi Department of Electrical and Computer Engineering The University of Wisconsin Madison, WI 53706-1691 [email protected] Abstract The Distributed Queue Dual Bus (DQDB) protocol has been jointly adopted by IEEE and ANSI as a standard (IEEE802.6) for metropolitan area networks (MANs). As such, how to provide various services in the DQDB protocol has attracted ...
متن کاملDQDB+-/: a fair and waste-free media access protocol for dual bus metropolitan networks
The distributed queue dual bus (DQDB) protocol, the media access protocol of the IEEE 802.6 standard for metropolitan area networks, does not fully take advantage of the capabilities of a dual bus architecture. Although a fair bandwidth distribution among the stations is guaranteed when using the socalled bandwidth balancing mechanism, the protocol requires a considerable amount of time to adju...
متن کاملOn Slot Reuse for Isochronous Services in DQDB Networks
Ching-Chih Hany, Chao-Ju Houz, and Kang G. Shiny yReal-Time Computing Laboratory zComputer Engineering Division Dept. of Elect. Eng. and Comput. Sci. Dept. of Elect. and Comput. Eng. The University of Michigan The University of Wisconsin Ann Arbor, MI 48109 Madison, WI 53706 fcchan,[email protected] [email protected] Abstract DQDB is a MAC protocol jointly adopted by IEEE and ANSI as the c...
متن کاملOn Slot Allocation for Time-Constrained Messages in Dual-Bus Networks
Several access schemes have been suggested for dual-bus network topology, e.g., DQDB [32], Fasnet [37], CRMA [41], and Simple [36]. It is therefore important to provide various services in this type of networks. This paper addresses the issue of guaranteeing the timely delivery of isochronous (real-time) messages with hard deadlines in slotted dual-bus networks. We propose a slot allocation sch...
متن کامل