On the Throughput Capacity and Performance Analysis of Hybrid Wireless Networks over Fading Channels

In this paper, we investigate the theoretical per-node transmission limit of hybrid wireless networks over fading channels. We formulate a hybrid wireless network model, in which a wired network of base stations is deployed to support long-range communications between wireless nodes. Two types of transmission mode, the so called intra-cell transmission mode and the infrastructure transmission mode are considered. Aiming to effectively overcome the fading impairments, we introduce an optimal multiple access technique allowing opportunistic sources to transmit concurrently with the scheduled source. A successive interference cancelation (SIC) strategy is then applied at the receiver to limit the intra-cell interference and achieve the maximum throughput. In addition, the frequency reuse scheme is employed to minimize the inter-cell interference. We first study the scaling laws for outage throughput capacity in the slow fading scenario and provide the closed-form analytical expressions for the outage throughput capacity at the regime of high signal-to-interference-plus-noise ratio (SINR). The ergodic throughput capacity, which serves as the performance criterion for fast fading situation, is then explored. We derive the tight bounds for ergodic throughput capacity at low SINR and high SINR scenarios, respectively. Finally, we provide the detailed quality of service (QoS) performance analysis in terms of the per-node average error probability (AEP). The theoretical bounds obtained are instrumental to the future energy-limited network modeling and design.

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