Virtual backbone construction for cognitive radio networks without common control channel

Abstract

Abstract-The advantages of virtual backbones have been proven in wireless networks. In cognitive radio networks (CRNs), virtual backbones can also play a critical role in both routing and data transport. However, the virtual backbone construction for CRNs is more challenging than for traditional wireless networks because of the opportunistic spectrum access. Moreover, when no common control channel is available to exchange the control information, this problem is even more difficult. In this paper, we propose a novel approach for constructing virtual backbones in CRNs, without relying on a common control channel. Our approach first utilizes the geographical information to let the nodes of a CRN self-organize into cells. Next, the nodes in each cell form into clusters, and a virtual backbone is established over the cluster heads. The virtual backbone is then applied to carry out the end-to-end data transmission. The proposed virtual backbone construction approach requires only limited exchange of control messages. It is efficient and highly adaptable under the opportunistic spectrum access. We evaluate our approach through extensive simulations.

An efficient algorithm for backbone construction in cognitive radio networks

“…Very few articles have been published towards virtual backbone formation in cognitive radio networks. In Dai et al, an initial home channel (IHC) is assigned to a node, and a node finds the status of other nodes using channel hopping technique, once the status of other nodes are known cluster formation takes place.…”

Channel dynamics matter: Forwarding node set selection in cognitive radio networks

“…We assume there is a common control channel (CCC) in our model. The CCC assumption is for the simplicity concern, but is not necessary if we apply the control channel calculation approach in [10]. In addition, the SINR(signal to interference-plus-noise ratio) from the sender node to the receiver has to be large enough for a successful transmission.…”

Pre-phase Improvement For Distributed Spectrum Sensing in Cognitive Radio Networks

“…Besides, we are unable to predefine the values of W 1 , W 2 , and W 3 , due to the limitations of equations (3) and (4). However, the relationship among them can be defined.…”

“…Spectrum sensing in CRNs is an important phase, in which secondary users determine if a channel is available. Lots of work has been done on how to achieve an accurate result through spectrum sensing [2][3][4][5][6][7][8]. There are usually multiple channels in CRNs.…”