Cooperative spectrum sensing in cognitive radio networks: A survey

This document provides updates to IEEE Std 802.16's MIB for the MAC, PHY and asso- ciated management procedures in order to accommodate recent extensions to the standard.

IEEE Standard for Local and Metropolitan Area Networks Part 16: Air Interface for Fixed Broadband Wireless Access Systems Draft Amendment: Management Information Base Extensions

The Transmission Control Protocol.

With the rapid deployment of new wireless devices and applications, the last decade has witnessed a growing demand for wireless radio spectrum. However, the fixed spectrum assignment policy becomes a bottleneck for more efficient spectrum utilization, under which a great portion of the licensed spectrum is severely under-utilized. The inefficient usage of the limited spectrum resources urges the spectrum regulatory bodies to review their policy and start to seek for innovative communication technology that can exploit the wireless spectrum in a more intelligent and flexible way. The concept of cognitive radio is proposed to address the issue of spectrum efficiency and has been receiving an increasing attention in recent years, since it equips wireless users the capability to optimally adapt their operating parameters according to the interactions with the surrounding radio environment. There have been many significant developments in the past few years on cognitive radios. This paper surveys recent advances in research related to cognitive radios. The fundamentals of cognitive radio technology, architecture of a cognitive radio network and its applications are first introduced. The existing works in spectrum sensing are reviewed, and important issues in dynamic spectrum allocation and sharing are investigated in detail.

/pdf/advances-in-cognitive-radio-networks-a-survey-3gp2nvo27m.pdf

Advances in cognitive radio networks: A survey

Intelligent reflecting surface (IRS) is an enabling technology to engineer the radio signal propagation in wireless networks. By smartly tuning the signal reflection via a large number of low-cost passive reflecting elements, IRS is capable of dynamically altering wireless channels to enhance the communication performance. It is thus expected that the new IRS-aided hybrid wireless network comprising both active and passive components will be highly promising to achieve a sustainable capacity growth cost-effectively in the future. Despite its great potential, IRS faces new challenges to be efficiently integrated into wireless networks, such as reflection optimization, channel estimation, and deployment from communication design perspectives. In this paper, we provide a tutorial overview of IRS-aided wireless communications to address the above issues, and elaborate its reflection and channel models, hardware architecture and practical constraints, as well as various appealing applications in wireless networks. Moreover, we highlight important directions worthy of further investigation in future work.

Intelligent Reflecting Surface-Aided Wireless Communications: A Tutorial

In Mobile Ad Hoc Networks (MANET), anomaly detection and response system (ADRS) plays a paramount role in diagnosing anomalous events, which are resulted by both accidental system errors and intentional attacks. While a variety of ADRS is ready for deployment, there lacks a sound and formal way to examine their operational characteristics for selecting the most appropriate ones with particular concerns. To that end, this paper develops a decision-theoretical framework to identify the fundamental tradeoffs between the key evaluation metrics of ADRS in MANET, along with a formal method to optimize the overall performance of ADRS in terms of those metrics of concern. In particular, each ADRS sensor is treated as an autonomous agent, making its decision as the local operational environment and a global signal that estimates the performance of ADRS as a whole, in terms of detection performance (detection accuracy and false positive rate) and operational cost (detection cost and response cost). The theoretical framework then serves as a basis for developing policy gradient algorithms for practically and automatically inferring the optimal behavior of ADRS sensors. A set of simulations is conducted for validating the feasibility and evaluating the performance of our proposed framework.

On Achieving Cost-Sensitive Anomaly Detection and Response in Mobile Ad Hoc Networks

Existing datacenter networks (DCNs) support the legacy cloud services well; nonetheless, it is inherently short of provisioning the emerging IoT services, such as the vehicle services, where real-time intelligence, cognition, and security are required, mainly due to its long distance with the IoT devices that generate the intelligent services. Regarding this, this paper proposes a new interconnection architecture for distributed DCNs by way of passive optical network (PON) technology to construct a ubiquitous cloud computing (UCC) environment with high scalability, resiliency, and data locality. A novel de-centralized architecture of virtualized mega DCNs on customized next-generation PONs (NGPONs) to provision UCC is proposed under the name of NGPON-DCN. In addition, a cost-effective deployment design framework and an associated revenue-driven elastic infrastructure-as-a-service delivery model are specified for creation and operation of such NGPON-DCN, followed by a discussion of anticipated key research challenges and optimization opportunities in this new NGPON-DCN convergence paradigm.

A Novel Framework of Distributed Datacenter Networks to Support Intelligent Services: Architecture, Operation, and Solutions

It has been shown that burst retranmsission scheme and burst deflection scheme can effectively reduce the burst loss probability, thereby improving the performance of loss-based TCP implementations. However, both schemes introduce additional delays for bursts that are retransmitted or deflected. The additional delays could result in delay-based TCP falsely detecting network congestion, which may negatively impact the performance of delay-based TCP implementations, such as TCP Vegas. In this paper we investigate the delay-based TCP Vegas behavior over OBS networks. Furthermore, we analyze the throughput of TCP Vegas over a barebone OBS network and an OBS network with burst retransmission.

Performance Evaluation of TCP Vegas over Optical Burst Switched Networks

Collaborative Intrusion Detection Systems are considered an effective defense mechanism for large, intricate, and multilayered Industrial Internet of Things against many cyberattacks. However, while a Collaborative Intrusion Detection System successfully detects and prevents various attacks, it is possible that an inside attacker performs a malicious act and compromises an Intrusion Detection System node. A compromised node can inflict considerable damage on the whole collaborative network. For instance, when a malicious node gives a false alert of an attack, the other nodes will unnecessarily increase their security and close all of their services, thus, degrading the system’s performance. On the contrary, if the spurious node approves malicious traffic into the system, the other nodes would also be compromised. Therefore, to detect a compromised node in the network, this article introduces a device integrity check mechanism based on “Digital Genome.” In medical science, a genome refers to a set that contains all of the information needed to build and maintain an organism. Based on the same concept, the digital genome is computed over a device’s vital hardware, software, and other components. Hence, if an attacker makes any change in a node’s hardware and software components, the digital genome will change, and the compromised node will be easily detected. It is envisaged that the proposed integrity attestation protocol can be used in diverse Internet of Things and other information technology applications to ensure the legitimate operation of end devices. This study also proffers a comprehensive security and performance analysis of the proposed framework.

/pdf/d2gen-a-decentralized-device-genome-based-integrity-3ui33qmjjl.pdf

D2Gen: A Decentralized Device Genome Based Integrity Verification Mechanism for Collaborative Intrusion Detection Systems

The ordinary path-based and link-based shared protection schemes can only provide a limited spectrum of protection services with coarse protection granularity, which will not be able to satisfy the versatile requirements of multimedia applications on the Internet in the foreseeable future. In this paper we propose a framework, Short Leap Shared Protection (SLSP), for service-guaranteed end-to-end shared protection for the optical Internet. We will show that SLSP enhances the 1:N and M:N shared protection schemes in terms of scalability, flexibility and class of service.

/pdf/a-framework-for-service-guaranteed-path-protection-of-the-2zzb448667.pdf

Pin-Han Ho

Papers

On Achieving Cost-Sensitive Anomaly Detection and Response in Mobile Ad Hoc Networks

A Novel Framework of Distributed Datacenter Networks to Support Intelligent Services: Architecture, Operation, and Solutions

Performance Evaluation of TCP Vegas over Optical Burst Switched Networks

D2Gen: A Decentralized Device Genome Based Integrity Verification Mechanism for Collaborative Intrusion Detection Systems

A Framework for Service-Guaranteed Path Protection of the Optical Internet