Method and System for Reducing Channel Interference in a Frame-Synchronized Wireless Communication System
First Claim
1. A method of reducing co-channel interference in a communication system having base stations and terminal stations with each terminal station associated with one base station sector, each base station has an associated and corresponding cell, each cell includes a plurality of associated and corresponding sectors, each sector of each cell having a different channel than the other sectors of the same cell, the communication system comprises an uplink and a downlink with each including at least one slot, and the uplink comprises an uplink signal divided in the frequency domain into a plurality of channels, the method comprising:
- determining a set of terminal stations that may potentially interfere with each other at a selected base station sector if they use the same channel;
determining a first subset of the set of terminal stations such that the subset communicates with a first set of associated and corresponding base station sectors that are arranged along a first line of sight that includes the selected base station;
determining a second subset of the set of terminal stations, wherein the subset communicates with a second set of associated and corresponding base station sectors that are arranged along a second line of sight;
allocating a first up link channel for the first subset of terminal stations; and
allocating a second uplink channel for the second subset of terminal stations.
3 Assignments
0 Petitions
Accused Products
Abstract
Base stations having potentially interfering terminal stations that are geographically located on the same or similar diagonal or Line of Sight (relative to the base station) operate on a first set of time frames (e.g., “even” time frames). Similarly, base stations having potentially interfering terminal stations that are not geographically located on the same or similar diagonals operate on a second set of time frames (e.g., “odd” time frames). By alternating in their use of the even and odd frames, the potential for co-channel interference between terminal stations is minimized. Systems and methods are disclosed which reduce co-channel and adjacent channel interference between terminal stations of different cells as well as adjacent channel interference between terminal stations of adjacent cells. The methods and systems so described can be used during the deployment or expansion of a communication system in a region.
-
Citations
1 Claim
-
1. A method of reducing co-channel interference in a communication system having base stations and terminal stations with each terminal station associated with one base station sector, each base station has an associated and corresponding cell, each cell includes a plurality of associated and corresponding sectors, each sector of each cell having a different channel than the other sectors of the same cell, the communication system comprises an uplink and a downlink with each including at least one slot, and the uplink comprises an uplink signal divided in the frequency domain into a plurality of channels, the method comprising:
-
determining a set of terminal stations that may potentially interfere with each other at a selected base station sector if they use the same channel; determining a first subset of the set of terminal stations such that the subset communicates with a first set of associated and corresponding base station sectors that are arranged along a first line of sight that includes the selected base station; determining a second subset of the set of terminal stations, wherein the subset communicates with a second set of associated and corresponding base station sectors that are arranged along a second line of sight; allocating a first up link channel for the first subset of terminal stations; and allocating a second uplink channel for the second subset of terminal stations.
-
Specification