Any Resource Sharing via HWN* Routing
International Journal of Communications, Network and System Sciences
In this paper we present an adaptive distributed cross-layer routing algorithm (ADCR) for hybrid wireless network with dedicated relay stations (HWN*). To support versatile multimedia communication for Mobile Terminals (MTs), the HWN* integrates a cellular network, an ad hoc network and fixed relay nodes (RNs). A MT may borrow cellular data channels that are available thousands mile away via secure multi-hop RNs, where RNs are placed at flexible locations in the network. The MT can also
... MT can also communicate with each other or access internet ubiquitously. We discuss cross media access and network layers routing issues. The ADCR establishes routing paths across RNs or cellular network while providing appropriate QoS (quality of service). Through simulation, we verify the routing performance benefits of HWN* over conventional cellular systems and other hybrid network frameworks. It is anticipated that the simulation results reported in this paper will serve as a guideline for research based on distributed source routing involving heterogeneous wireless technologies. be a MT, a fixed RN or a group of RN matrices. When a MT transmits packets to a BS through RNs, the RNs extend the signaling coverage of BSON thus we can expect an enhanced resource sharing performance. A further discussion on the HWN* topology description can be found in  . We propose an Adaptive Distributed Cross-layer Routing (ADCR) algorithm in HWN* to (a) route packet using the minimal number of relay hops to reduce latency preserve communications, (b) deliver good overall throughput and per node throughput and (c) enable lowcomplexity router implementation. A cross-layer network design  that seeks to enhance the performance of a system by jointly designing MAC and NETWORK layers is desirable. In the design stage of the ADCR algorithm development, we analysed the theoretical cellular network media access capacity, multi-hop traffic relaying issues and inter network traffic handovers. The cascaded ADCR scheme includes three sub packet transmission modes labeled as One-Hop Ad-Hoc Transmission (OHAHT) for point to point ad hoc direct communication, Multi-Hop Combined Transmission (MHCT) for cellular resource relaying using fixed RNs and Cellular Transmission (CT) for traditional cellular service. Our approach allows upper layers to better adapt their strategies to varying link and network conditions while the resulting flexibility helps to improve access speed, end-to-end delay and dynamic resource management performance. This paper begins with a hybrid wireless networks literary review, including up to date network deployment scenarios and infrastructure dimensioning analysis. In Fixed node Antenna Not investigated Smart antenna / directional antenna Not investigated Traffic handover Heterogeneous network handover with QoS support Ubiquitous network handover Not investigated Call admission Coordinated admission controlled by BS Coordinated admission controlled by both BS and RN Central admission controlled by BS Routing issues BS switch and RN assisted traffic diversion BS and RN switch BS switch Load Balance Multihop based load balancing considering QoS Not investigated Multihop load balancing 38 C. SHEN ET AL.