The strategy of using IEEE802.5 reserving protocol the metropolitan area net of integrated service
综合业务城域网IEEE802.5预约级协议改进策略

Reservation is frequently used in the local area network(LAN). One of the most famous application is IEEE802.5 reservation protocol. In order to make use of the reservation protocol in the annular MAN, it is necessary to pay more attention to the characteristics of the integrated services. Their purpose is not only assuring the high rank information can reserve token in ahead but also preventing the low rank information (especially the lowest rank information)waiting for a long time. This paper proposes "high reservation rank interrupt protocol" which can solve the problem rationally. The motif is properly enhancing QoS(Quality of Service) for the low rank information at the cost of the decrease of QoS for the high one. Simulation results show that the improved IEEE802.5 reservation protocol is adapt to MAN which has integrated service.