Which among the following may be employed to reduce performance degradation on a route with interference towards primary users?(a) Multiple spectrum brokers(b) Spatially distributed amplifiers(c) Multi-spectrum interfaces(d) Spatially distributed base-stationsThis question was addressed to me during an online interview.The query is from Next Generation Wireless Network in division Next Generation Wireless Network of Cognitive Radio

Which among the following may be employed to reduce performance degrad

1.	Which among the following may be employed to reduce performance degradation on a route with interference towards primary users?(a) Multiple spectrum brokers(b) Spatially distributed amplifiers(c) Multi-spectrum interfaces(d) Spatially distributed base-stationsThis question was addressed to me during an online interview.The query is from Next Generation Wireless Network in division Next Generation Wireless Network of Cognitive Radio
Answer» RIGHT answer is (c) Multi-spectrum interfaces The best EXPLANATION: If a route between two XG users causes interference to surrounding primary users, it might affect the end-to-end latency or might cause packet loss along the route. This COULD be overcome by using multiple spectrum interfaces at intermediary nodes which INTRODUCES multiple hops in a route.

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