Patent ID: 9730058
Date: 2017-08-08
CPC Classifications: H04B,H04K,H04W

Claim:
1. A distributed antenna system for relaying telecommunications signals in a coverage area comprising: a central hub connectable to one or more base stations; a plurality of remote radio units for relaying the telecommunications signal in the coverage area; a receiver for detecting presence of an uplink signal from a mobile station in at least a part of the coverage area, the uplink signal being in at least one frequency range; a monitoring device connected to the central hub and configured to cause the jammer signal to be generated in said at least one frequency range to be blocked; and at least one jammer signal generator for generating a jammer signal in said at least one-frequency range to be blocked in at least part of the coverage area, the jammer signal generator being configured to generate the jammer signal on receipt of the uplink signal in the coverage area, and to increase strength of the jammer signal in the at least one frequency range to be blocked until the uplink signal from the mobile station is no longer detected in the coverage area, wherein the at least one jammer signal generator is further configured to amplify the jammer signal at different levels in different ones of frequency ranges.