Mobility

Detection Error Aware Spectrum Handoff Mechanism for Cognitive Radios

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Executive Summary

Spectrum handoff is a key mechanism for proper and efficient operation of cognitive radios. A handoff occurs when the current operating channel must be freed by secondary users due to the arrival of a primary user. This mechanism is responsible for searching for a new idle licensed channel for secondary use, a task known as channel selection. The order in which the channels are sensed during the handoff has a great impact on performance. This paper proposes a new spectrum handoff scheme that considers the existence of errors in primary user detection to achieve a better channel ordering in terms of spectrum utilization efficiency and primary user interference.

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