A HIGH-THROUGHPUT, INGRESS-NOISE IMMUNE, MULTIMEDIA CABLE MODEM

Cable TV networks are expected to become promising candidates of broad band access networks because of their capability of large penetration rate and broad bandwidth. However, there are a number of technical cha llenges to overcome in order to make this a successful solution for ac cess network. One problem is ingress noise, which is the burst noise s pecific to cable TV networks. Another problem is limited upstream band width, which is shared with thousands of subscribers. We have investig ated the characteristics of ingress noise in detail and developed a ne w multiple access control protocol for cable modem, MPRG (Multi Priori ty Reservation and Grant). This protocol improves the ingress noise to lerance and provides highly efficient channel utilization. This paper provides details of the proposed protocol and the performance evaluati on of cable modem system implementing this protocol.