An efficient multimedia transmission using cross-layer scheduling scheme in a multi-hop ORN

摘要

The adoption of licensed spectrum by unlicensed users creates an interest in Opportunistic Radio Networks (ORN) and dynamic spectrum access. However the licensed user (primary user) does not use the spectrum all the time. To utilize the spectrum which is not utilized by the primary user at a time, a secondary user (unlicensed user) can use the spectrum. The spectrum mobility will create an opportunity for the secondary users to transmit the multimedia data as packets with minimum overhead. This will lead to create a problem in subcarrier selection, queuing delay, modulation and power allocation in Opportunistic Radio Networks. Many methods in ORN on multimedia data transmission are effective but do not fulfill the QoS requirements. For more efficient usage of spectrum, an efficient multimedia transmission using multi-hopping technique in the underutilized spectrum band of the licensed user to be utilized by unlicensed user is proposed. The technique uses M/G/1 Queuing model derived by P-K formula for Queuing delay, Bayesian model for Subcarrier selection, QPSK for modulation and power allocation and cross layer scheduling based on delay and a throughput constraints.