A priority scheme for the IEEE 802.14 MAC protocol for hybrid fiber-coax networks

M.D. Corner, J. Liebeherr, N. Golmie, C. Bisdikian, D.H. Su
2000 IEEE/ACM Transactions on Networking  
In order to provide Quality of Service (QoS) to users with real-time data such a s v oice, video and interactive services, the evolving IEEE 802.14 standard for Hybrid Fiber Coaxial (HFC) networks must include an e ective priority s c heme. In this paper we i n vestigate the ability of the current speci cation to provide priority service and show that a preemptive s c heduler is not a su cient solution. We propose to augment the scheduler with a novel scheme for implementing priority a c c e s
more » ... priority a c c e s s i n a n H F C random access environment. The proposed mechanism integrates a multilevel priority collision resolution system into the proposed IEEE 802.14 MAC. The scheme separates and resolves collisions between stations in a priority order. A set of simulation scenarios is presented that shows the robustness and e ciency of the protocol, such as its ability to isolate higher priorities from lower ones and provide quick access to high priority requests. We also give analytical results on the space occupied by priority contention slots at any g i v en interval after a collision.
doi:10.1109/90.842142 fatcat:4dvpvdx2l5gjdk5yo3ynzqpuiq