Capacity Analysis of Multihop Packet Radio Networks under a General Class of Channel Access Protocols and Capture Models.

摘要

A packet radio network is a collection of geographically distributed packet radio units communicating over a shared broadcast channel. Usually not all radio units are within hearing range of each other, and thus multihop operation is required. These networks represent the natural extension of point-to-point packet-switched data networks when mobile operation is desired. An important difference exists, however, with respect to the latter: due to the multiaccess nature of the radio channel, the success of a packet at a destination depends on the activity, during the transmission of the packet, of the neighbors of the destination, and on system parameters such as the type of signaling and received power levels. The conditions under which a packet is successfully received in the presence of interfering packets are designated as the capture mode. Due to the existence of multiuser interference, some form of coordination among the users is required when accessing the channel. This purpose is accomplished by the channel access protocol. (RRH)