Performance guaranteed statistical traffic control in cognitive cellular networks

To deploy cellular networks, crowded spectrum leads to compact arrangements of frequency bands among wireless/cellular networks resulting in unsolvable interference in Layer 1. For circumstances without centralized coordinations, the cognitive radio (CR) as the most promising technology for interference avoidance, however, can only be supported by cellular networks in limited functionalities of interference detection and opportunistic channel access under the concerns of unreliability in operations and potential system overheads, which may harm the most important quality-of-service (QoS) guarantees. Considering the power of multicell cooperated multipath (MCM) technology on enhancing QoS, the critical challenge lies in an effective control of packet transmissions, radio resources, and call admission from Layer 1 to Layer 3. To merge merits of CR and MCM, we propose the statistical traffic control (STC), under which, each packet of constant bit rate (CBR) and variable bit rate (VBR) sources is transmitted through all available paths in MCM. Deriving sufficient conditions for QoS guarantees, the time domain radio resource is optimized. By evaluating performance on voice and video transmissions, we demonstrate the effectiveness of the STC to practice cognitive cellular networks.