Coexistence protocols and algorithm for heterogeneous networks

概要

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In this paper, we investigate the coexistence issue of distributed heterogeneous networks where the network nodes are cognitive radio terminals. These nodes, operating as secondary users(SUs), might interfere with primary users(PUs)who are licensed to use a given frequency band. Further, due to the lack of coordination and the dissimilarity of the radio access technologies(RATs)among these wireless nodes, they might interfere with each other. To solve this coexistence problem, we propose a protocol that enables coordination among the distributed nodes. The protocol provides coexistence solutions and sends reconfiguration commands to SU networks. As an example, time sharing is considered as a solution. Further, the time slot allocation ratios and transmit powers are parameters encapsulated in the reconfiguration commands. Using the quality of coexistence(QoC)which is defined as the ratio between the quality of SU transmissions and the negative interference to PUs we show that the performance can be improved by 30% using the proposed scheme.
2010-07-22