A New Approach for Routing Plane Construction in Future Multi-Plane Routing based Wireless IP Access Networks

摘要

There has been a rapid rise in the IP trafficthroughout the Internet which takes advantage of the alreadyestablished widespread IP infrastructure. Different suggestionsare being explored to facilitate the next-generation access net-works via IP mechanisms, with a growing trend towards aflat-IP structure and novel topological set-ups in the backhaul.Aligned with this evolution, there are increasingly more userapplications flooding the Internet that calls for a consistentrouting strategy to minimize loss in data transmission. In thispaper, Multi-Plane Routing (MPR), which incorporates variousaspects in all-IP infrastructure will be studied under the newaccess network structure. MPR is based on Multi-Topology OpenShortest Path First (MT-OSPF) principle and divides the physicalnetwork topology into several logical Routing Planes (RPs). Theoffline Traffic Engineering (TE) strategy for MPR has beenoptimized using a heuristic hop-constraint solution that suitsthe “flattened” network realized through the incorporation ofdirect communication between Aggregation Routers. With ourapproach, despite of a higher number of Ingress−Egress pairsfor traffic in the access network, the number of RPs has beenkept to the desirable level whilst the reliability indicator andthe path diversity index ratio have increased up to 47% and33% respectively. Our proposed MPR-based offline approach hasalso shown improvement compared with the Multi-Protocol LabelSwitching (MPLS) offline approach.