A Bandwidth Reallocation Scheme for Ethernet-Based Real-Time Communication

摘要

The objective of this paper is to develop a bandwidth reallocation scheme for TDMA-implemented Ethernet. The reallocation protocol consists of reporting change, calculating a new schedule, and reliably broadcasting the schedule. We also address the problem of static assignment of allocation vector, validate the essentiality of reallocaiion scheme, and design the scheme according to its unctional requirements. The proposed scheme changes bandwidth allocation during the runtime operation of network system without affecting other traffics, so it can overcome the problem of static allocation. It completes reallocation within a bounded time as long as there are no transmission errors. Using this approach, the network is allowed to adapt to distributed real-time systems where traffic characteristics change dynamically.