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In this paper we consider the problem of distributed channel allocation in large networks under the frequency-selective interference channel. Performance is measured by the weighted sum of achievable rates. First we present a natural non-cooperative game theoretic formulation for this problem. It is shown that, when interference is sufficiently strong, this game has a pure price of anarchy approaching...
Designing high performance channel assignment schemes to harness the potential of multi-radio multi-channel deployments in wireless mesh networks (WMNs) is an active research domain. A pragmatic channel assignment approach strives to maximize network capacity by restraining the endemic interference and mitigating its adverse impact on network performance. Interference prevalent in WMNs is multi-faceted,...
The advancements in wireless mesh networks (WMN), and the surge in multi-radio multi-channel (MRMC) WMN deployments have spawned a multitude of network performance issues. These issues are intricately linked to the adverse impact of endemic interference. Thus, interference mitigation is a primary design objective in WMNs. Interference alleviation is often effected through efficient channel allocation...
Device-to-Device (D2D) communication as an underlaying cellular network empowers direct communication between two users and helps in offloading network traffic. However, due to interference posed by the D2D transmitters to the primary cellular users, intelligent resource allocation techniques need to be incorporated for the betterment of the overall system. Overlay D2D communication eliminates the...
An adaptive channel allocation scheme for bidirectional in-band full-duplex networks is proposed by modifying a channel allocation scheme for half-duplex networks on the basis of the property of bilateral symmetric interaction. To adapt schemes for half-duplex networks to full-duplex networks, we modify them so that channel update process successfully converges to a Nash equilibrium, i.e., it does...
Interference avoidance between macro and femto cells is necessary in heterogeneous network (HetNet) systems. To solve the issues, we proposed a method that controls not only transmit power but also channel assignment by genetic algorithm. In this paper, we optimize parameters in indoor environment under the constraint from interference from macro networks and evaluate the throughput performance in...
Dense wireless networks require advanced interference management for the performance improvement. In carrier sense multiple access with collision avoidance (CSMA/CA) networks, the mutual interference can be modeled as the overlap area, and range adjustment, such as transmission power control (TPC) and dynamic channel assignment (DCA), is effective to reduce the overlap area. A game-theoretic framework...
Wireless Mesh Network (WMN) deployments are poised to reduce the reliance on wired infrastructure especially with the advent of the multi-radio multi-channel (MRMC) WMN architecture. But the benefits that MRMC WMNs offer viz., augmented network capacity, uninterrupted connectivity and reduced latency, are depreciated by the detrimental effect of prevalent interference. Interference mitigation is thus...
In this paper, we consider a dynamic system composed of several Wireless Body Area Networks (WBANs) interacting with the surrounding environment, forming Body-to-Body Networks (BBNs). In this dynamic BBN system, we analyze the joint mutual and cross-technology interference problem due to the utilization of a limited number of channels by different transmission technologies (i.e., ZigBee and WiFi)...
Rapid increases in mobile data demand and inherently limited RF spectrum motivate the use of dynamic spectrum sharing between different radio technologies such as WiFi and LTE, most notably in small cell (HetNet) scenarios. This paper provides a analytical framework for interference characterization of WiFi and LTE for dense deployment scenarios with spatially overlapping coverage. The first model...
We consider distributed optimization over orthogonal collision channels in spatial multi-channel ALOHA networks. Users are spatially distributed and each user is in the interference range of a few other users. Each user is allowed to transmit over a subset of the shared channels with a certain attempt probability. We study both the non-cooperative and cooperative settings. In the former, the goal...
Software-Defined Networking promises to deliver more flexible and manageable networks by providing a clear decoupling between control plane and data plane and by implementing the latter in a logically centralized controller. However, if such principles are to be applied also to wireless networks, new primitives and abstractions capable of providing programmers with a global view of the network capturing...
Due to increasing demand of cellular communication services, determining a spectrum efficient and conflict-free allocation of channel among the cells while satisfying both the interference constrains and the traffic demand, become a NP - hard channel allocation problem. Minimizing call blocking probability may raise interference, which may increase call dropping probability. In order to minimize call...
The dynamic spectrum allocation and power control algorithms are investigated in multi-hop cognitive radio networks. For the purpose of consideration about fairness among secondary users, we propose a novel resource allocation algorithm which encompasses the channel allocation and power control with the interference for primary users constrained below a tolerable limit. The proposed scheme favors...
Wireless Mesh Networks (WMNs) is an emerging and latest technology that is used to develop the new attractive applications for wireless network users. WMNs provide a good platform for many researchers to develop new innovative procedures and methods to improve the network performance in wireless enterprise backbone networks. WMNs have unique features like ease of deployment at low cost. By adding...
The paper suggests a plan for efficiently allocating limited radio frequency (RF) resources by using a propagation interference analysis (PIA). For this, interference path rates (IPR) among networks were calculated and compared with allowable interference rates (AIR) to determine channel reuse. For improving the speed at which IPR is calculated, the minimum interference separation distance (MISD)...
With the wide application of these technologies in wireless networks such as Multipath transmission, opportunistic routing, Cooperative communication and so on, channel interference and resource contention become more intense, which greatly decrease the network throughput, seriously affect network efficiency[1]. Further, the ripple effect which caused by inappropriate channel switching will result...
Cognitive Radio is an emerging field of research that has the potential to cause a global transformation in the present day radio technology. The present day radio spectrum is allocated and divided between licensed and unlicensed frequencies. This policy being rigid has resulted in some frequency bands growing in scarcity and leaving a large portion of the radio spectrum still unused. Cognitive Radio...
Spectrum sharing by using cognitive radio technology has attracted attention as an effective solution to shortage of spectrum resource. In the spectrum sharing, unlicensed users (secondary users: SUs) exploit white space (WS) which is unused band by licensed users (primary users: PUs). In the related works, the channel assignment method maximizing the SU communication quality while protecting the...
This paper proposes a novel adaptive internetwork interference mitigation scheme, namely AIM, for environments with multiple coexisting Wireless Body Area Networks (WBANs). The proposed scheme, operating on a nodes' traffic priority, packet length, signal strength and density of sensors in a WBAN, makes three major contributions as compared to the current literature. Firstly, it considers node-level...
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