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Cooperative communication is a crucial technology to sustain QoS of mobile user with increased energy efficiency. To improve QoS of cell edge users, energy efficiency and network utilization, cooperative communication can be used in heterogeneous networks. Source, destination and relays are multiple radio access nodes in heterogeneous networks hence source can communicate to relay and destination using one radio mode and relay can select some other efficient radio mode to retransmit message to destination. In this paper, QoS improved energy efficient radio mode and optimal relay(Q-EERR) selection algorithm with heterogeneous relays is proposed, in which each relay node considers dynamic variation of individual radio networks and efficiently select radio mode using Boltzmann–Gibb’s learning algorithm to retransmit message with required QoS and optimized energy. A novel heterogeneous relays introduced in proposed work act as store carry and forward relay (SCFR) for non real time services and decode and forward relay (DFR) for real time services. The proposed Q-EERR algorithm with heterogeneous relays is verified for real time services (voice and video conferencing), elastic service (FTP) and performances are compared with existing energy efficient relay and radio mode (EERR) selection algorithm with DFR and SCFR. It increases QoS of different services, network performance and reduces average transmit power compared with existing algorithm.
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- QoS Improved Energy Efficient Cooperative Relaying in Heterogeneous Networks Using Heterogeneous Relays
- Springer US