Patent ID: 8300538
Filing Date: 2012-10-30
Classification: H04L,H04W

Abstract:
1. A method of setting a routing path for transmitting a packet from a source node to a destination node in a wireless multi-hop network consisting of plural nodes and plural links for connecting two nodes with each other, comprising: calculating carrier sense interference weights representing carrier sense interference related to the respective links and combining the carrier sense interference weights of the links included in at least one specific path connecting the source node with the destination node; calculating hidden node weights representing hidden node problems related to the respective links and accumulating the hidden node weights of the links included in the path, wherein the hidden node weight is calculated by expected collision numbers due to all hidden links affecting the specific link in the path and the packet transmission time over the specific link, and the expected collision number is the number of transmissions of a packet due to collisions with the hidden node according to a hidden node collision (HNCOL) analytical model; and calculating a metric value for the specific path by combining the carrier sense interference weights and the hidden node weights, and determining the specific path with the least metric value as the routing path.