Query the database to resolve issues with blind base station operations that conflict with protected services

Abstract

The database stores updated information related to the protected communication service. A base station for concurrent and possibly co-channeled unprotected communication services queries the database requesting identifications of geographically related protected services and database stored information related to each of those identified protected services. The returned information is processed by the base station to determine what channels are available for unprotected service. The available channels are identified by the base station as working channels for unprotected service, and the base station initiates the process of establishing a communication network using the unprotected service and the selected working channel.

Description

technical field [0001] The present invention relates to co-channel wireless communication systems and, in particular, to addressing co-existing problems that lead to harmful interference between such co-channel wireless communication systems. Background technique [0002] now refer to figure 1 , in which a concurrent co-channel wireless communication system is schematically illustrated. The first wireless communication system 10 provides a service A from a broadcasting station 12 over a certain channel K. Service A is a "Protected Wireless Telecommunications Service". This means that the channel K through which the service A is provided is reserved for the service A within a predetermined range (distance) of the broadcasting station 12 without contention or interference from other services. An example of a protected service, such as Service A, includes a television (TV) broadcast service or an FM radio broadcast service. [0003] The second wireless communication system ...

AI Technical Summary

Problems solved by technology

However, since Service B has no network members within shaded area 32 (or members are not functioning properly to detect interference), base station 22 will not receive interference reports from any network members and thus has no knowledge that it is facing a network member in shaded area 38. Possible or actual interference caused by protected service A

[0010] In general, the blind base station problem exists when each of the following four conditions is met simultaneously: 1. Service B and Service A are simultaneously operating on the same channel (e.g., channel K); A's noise-limited contour 36 overlaps (i.e., the radius of Service B's coverage area plus the radius of Service A's noise-limited contour exceeds the distance between two broadcast stations / base stations); 3. Service B's The base station is outside the coverage area 30 of service A (i.e. the distance between the two broadcast stations / base stations is greater than the radius of the coverage area of ​​service A); There are no network members for Service B in the overlap area (area 32) between coverage areas 30 (or such members are not functioning correctly)

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