Adaptive QoS management in heterogeneous home network applications

An OSGi (Open Services Gateway Initiative) home gateway system handles the integration of heterogeneous home networks protocols and devices to develop ubiquitous applications. Wired and wireless heterogeneous home networks have different QoS concerns. For instance, jitter and latency are important concerns in web phones, while packet loss ratio is important in on-line video. The available UPnP QoS specification version 1.0 is adopted herein to design an adaptive QoS management mechanism based on the RMD (Resource Management in DiffServ) architecture. This study monitors the real-time network traffic, and adaptively controls the bandwidth, to keep the least but most important quality for each application in home network congestion. Simulation results indicate that the average jitter, latency and packet loss are reduced by 0.1391 milliseconds, 0.0066 seconds, and 5.43%, respectively. To address different real-time applications, the packet loss ratio is reduced by 4.53%, and the throughput is increased by 1.2% in high definition video stream; the packet loss ratio is reduced by 1.89% for standard definition video stream, and in VolP (Voice over IP) the jitter and latency are reduced to 0.0407 milliseconds and 0.0209 seconds, respectively.