Relay-Assisted Multiuser Video Streaming in Cognitive Radio Networks

Abstract

Due to the drastic increase in wireless video traffic, the capacity of the existing and future wireless networks will be greatly stressed, while interference will become the dominant capacity-limiting factor. In this paper, we investigate relayassisted downlink multiuser video streaming in a cognitive radio (CR) cellular network. We incorporate zero-forcing precoding to allow transmitters collaboratively send encoded (mixed) signals to all CR users, such that undesired signals will be canceled and the desired signal can be decoded at each CR user. We present a stochastic programming formulation of the problem, as well as a problem reformulation that greatly reduces computational complexity. In the cases of a single licensed channel and multiple licensed channels with channel bonding, we develop an optimal distributed algorithm with proven convergence and convergence speed. In the case of multiple channels without channel bonding, we develop a greedy algorithm with a proven performance bound. The algorithms are evaluated with simulations and are shown to achieve considerable gains over two heuristic schemes.

Multimedia Communication over Cognitive Radio Networks from QoS/QoE Perspective; A Comprehensive Survey

“…Closed-form Expression [132] Column Generationbased Algorithm [85] Dynamic Programming [135], [206], [229], [239], [240] Fountain Code [125], [126], [201] Greedy Algorithm [86]- [89], [100], [106], [207], [216], [241]- [243] Non-linear Programming [136], [244], [245] Lift-and-Project [246] Miscellaneous Multi-channel Mode [86], [87], [105], [137], [145], [146], [242], [247]- [250] Carrier Aggregation [84], [ [78], [83], [84], [100], [103], [121], [134], [137], [200], [209], [247], [249], [257]- [259] fully cognitive, they need to be equipped with learning and reasoning capabilities. Us...…”

“…A relay-assisted downlink multi-user multimedia streaming was investigated in CRNs [86]. The authors incorporated zerofacing preceding to permit the transmitters collaboratively transmit encoded (mixed) signals to all SUs in a manner that the unwanted signals would be eliminated and the desired signal could be decoded at every SU.…”

On Efficient Channel Modeling for Video Transmission over Cognitive Radio Networks

“…On the other hand, in [15], a decentralized cross-layer control scheme is proposed to maximize the network throughput. Also, in [16], the authors formulated a stochastic programming model for the problem of relay-assisted downlink multiuser video streaming in a CR cellular network. Video streaming over multi-hop CR networks has been addressed in [17] where a mixed integer nonlinear optimization problem was formulated to maximize the overall received video quality.…”

Merge‐and‐forward: a cooperative multimedia transmissions protocol using RaptorQ codes

“…Rapid growth of wireless multimedia applications and mobile Internet access has fundamentally changed the wireless network traffic and created the need for enhanced and reliable video contents delivery over wireless cellular networks [1]. A survey conducted by Cisco in 2014 states that the wireless network traffic will grow eleven‐fold from 2013 to 2018 and 66% of the increased traffic will be video‐related [2, 3]. Recently, fifth‐generation (5G) cellular networks have gained a significant research attention and effort from both industry and academia.…”