STATIC CHANNEL ALLOCATION ALGORITHM
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2002-Jun-04
All mobile telephony services require that a channel be established between the mobile subscriber and a system base station. It is necessary to reuse these channels as often as possible to maximize the number of users that the system can serve but the channels must be spatially separated from like channels to avoid interference. In terres- trial mobile telephony, such as standard cellular phone service, this channel assignment process is well defined because the base stations are at fixed locations. The advent of satellite based mobile telephony adds a new dimension to this problem. The problem of maintaining adequate channel sepa- ration becomes very difficult in systems that employ polar or near polar orbits to provide global coverage. The use of polar orbits requires that at some point the globe is being covered by adjacent satellites that are traveling in opposite directions, this area is normally referred to as the "seam." In light of this, and other constraints, this paper discusses a simple algorithm to allocate channels to subscribers in a satellite based system.