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 cloud computing paradigm has become a mainstream solution for the deployment of business processes and applications. In the public cloud vision, infrastructure, platform, and software services are provisioned to tenants (i.e., customers and service providers) on a pay-as-you-go basis. Cloud tenants can use cloud resources at lower prices, and higher performance and flexibility, than traditional on-premises resources, without having to care about infrastructure management. Still, cloud tenants remain concerned with the cloud’s level of service and the nonfunctional properties their applications can count on. In the last few years, the research community has been focusing on the nonfunctional aspects of the cloud paradigm, among which cloud security stands out. Several approaches to security have been described and summarized in general surveys on cloud security techniques. The survey in this article focuses on the interface between cloud security and cloud security assurance. First, we provide an overview of the state of the art on cloud security. Then, we introduce the notion of cloud security assurance and analyze its growing impact on cloud security approaches. Finally, we present some recommendations for the development of next-generation cloud security and assurance solutions.

/pdf/from-security-to-assurance-in-the-cloud-a-survey-290g4r59wk.pdf

From Security to Assurance in the Cloud: A Survey

Internet of Things (IoT) is an integration of the Sensor, Embedded, Computing, and Communication technologies. The purpose of the IoT is to provide seamless services to anything, anytime at any place. IoT technologies play a crucial role everywhere, which brings the fourth revolution of disruptive technologies after the internet and Information and Communication Technology (ICT). The Research & Development community has predicted that the impact of IoT will be more than the internet and ICT on society, which improves the well-being of society and industries. Addressing the predominant system-level design aspects like energy efficiency, robustness, scalability, interoperability, and security issues result in the use of a potential IoT system. This paper presents the current state of art of the functional pillars of IoT and its emerging applications to motivate academicians and researches to develop real-time, energy-efficient, scalable, reliable, and secure IoT applications. This paper summarizes the architecture of IoT, with the contemporary status of IoT architectures. Highlights of the IoT system-level issues to develop more advanced real-time IoT applications have been discussed. Millions of devices exchange information using different communication standards, and interoperability between them is a significant issue. This paper provides the current status of the communication standards and application layer protocols used in IoT with the detailed analysis. The computing paradigms like Cloud, Cloudlet, Fog, and Edge computing facilitate IoT with various services like data offloading, resource and device management, etc. In this paper, an exhaustive analysis of Edge Computing in IoT with different edge computing architectures and existing status are deliberated. The widespread adoption of IoT in society has resulted in privacy and security issues. This paper emphasizes on analyzing the security challenges, privacy and security threats, conventional mitigation techniques, and further scope for IoT security. The features like fewer memory footprints, scheduling, real-time task execution, fewer interrupt, and thread switching latency of Real-Time Operating Systems (RTOS) enables the development of time critical IoT applications. Also, this review offers the analysis of the RTOS’s suitable for IoT with the current status and networking stack. Finally, open research issues in IoT system development are discussed.

/pdf/an-empirical-study-on-system-level-aspects-of-internet-of-3rbpbswc2d.pdf

An Empirical Study on System Level Aspects of Internet of Things (IoT)

The extensible Messaging and Presence Protocol (XMPP) is a versatile protocol that demonstrates many advantages over traditional communication protocols. XMPP's origin as an instant messaging (IM) protocol ensures that it inherits a tight relation with social communities and its flexibility makes it a very good candidate for converging communications between different application domains, such as social networks, consumer electronics and cloud computing. This paper reviews the XMPP protocol, its standardization community extensions and its usage in published literature. An application domain classification, or taxonomy, is derived and used to relate complementary and competing instances of XMPP deployment.

From instant messaging to cloud computing, an XMPP review

The increasing demand for mobile communication calls for improvements to network operating services in terms of capacity, coverage, and Quality of Services (QoS). Ensuring QoS is one of the challenges faced by wireless network operators, which include the provision of high mobility speeds, thus the implementation of a seamless and fast handover between network cells is a prominent issue that must be addressed, especially when fulfilling QoS prerequisites. Long Term Evolution (LTE)/LTE-Advance has met these demands of QoS through the use of a new Radio Access Network and distribution of Radio Resource Management including the handover decision technique to evolve NodeB instead of relying on centralized control. In this paper, we review the control plane structure of LTE/LTE-A and present a comprehensive discussion of handover procedures such as the phases, techniques, requirements, features, and challenges involved. According to the overview of the handover decision phase, we surveyed and classified the present handover decision algorithms for a LTE-A system-based technology in regard to the primary handover decision technique. For each class, we describe in detail the fundamental operations and decision parameters using representative algorithms. A summary of input parameters, techniques, and performance evaluation of the handover decision algorithms concludes this work.

Handover in LTE-advanced wireless networks: state of art and survey of decision algorithm

LBPS: Load-Based Power Saving in the IEEE 802.16e Network

Short message service has been growing tremendously in the last few years. Meanwhile, instant messaging service has been getting more and more popular, too. To bridge them is becoming a new promising niche because people really enjoy getting messages instantly, anywhere at any time. However, there is still not a common, unified and open standard to communicate with each other. Big instant message providers, such as AOL, MSN, Yahoo, and ICQ dominate Internet instant message systems via proprietary protocols. Although, major handset manufactures, e.g., Ericsson, Motorola, and Nokia, formed the Wireless Village Initiative to ensure interoperability of instant message service particularly; it requires buying their new handsets to support. However, people don't change handsets often. On the other hand, every carrier operator has been trying to refine its own homemade interface to short message application services with the intention to cover the complexity and security of the communication with its own short message service center. Hence, in this paper we propose an infrastructure, based on the XML-based protocol, XMPP, not only to simplify interconnections among Internet instant message systems and short message systems, but also to support legacy handsets for instant message service. Besides, most operators' short message service centers do not guarantee delivery in order. Therefore, we are also going to introduce a mechanism inside our servers in order to make in-order delivery sensitive services applicable on top of this infrastructure.

A novel design of instant messaging service extended from short message service with XMPP

The popularity of handheld devices, which are usually powered by batteries, has made power saving an important and practical issue in recent years. Techniques of power saving for user devices using mobile communication systems such as WiMAX and LTE (Long-Term Evolution) are parts of the major focuses in the literature. In this paper, two revised schemes of the authors’ previously proposed power saving schemes for IEEE 802.16 are proposed to be applied in LTE. The proposed schemes, namely LTE-LBPS-Aggr and LTE-LBPS-Merge, estimate the input load by traffic measurement and the channel capacity by channel quality indicator (CQI) reports, calculate the length of the sleep cycle, and notify related user equipments (UEs) of the next radio-on time for receiving data. The difference between LTE-LBPS-Aggr and LTE-LBPS-Merge lies in the grouping of UEs for sleep scheduling. LTE-LBPS-Aggr treats all UEs in a group, while LTE-LBPS-Merge allows multiple groups of UEs in sleep scheduling. The simulation study shows that in comparison with standard-based mechanisms, the proposed schemes can achieve better power saving efficiency at the cost of moderate increase on delays and the signaling overhead.

/pdf/adaptive-load-based-and-channel-aware-power-saving-for-non-570foyo4w1.pdf

Adaptive load-based and channel-aware power saving for non-real-time traffic in LTE

We propose an enhancement of Mobile IP (MIP) called MIP with Home Agent Handover (HH-MIP) to enjoy most of the advantages of Route Optimization MIP (ROMIP) but with only a small increase of signaling overhead. In HH-MIP, the concept of Temporary HA (THA) is proposed and the mobile host (MH) registers the new CoA with its THA rather than its original HA. Since the THA of an MH is selected to be close to the current location of MH, HH-MIP reduces the handoff latency and shortens the signaling path of registration as well. Moreover, HH-MIP adopts an aggressive approach in selecting THA for an MH, that is, whenever an MH is moving away from its HA or previous THA, the MH triggers the handover of THA. Theoretical analysis demonstrates that the proposed scheme enjoys small handoff latency as well as routing efficiency, and the signaling cost of the proposed scheme is significantly less than that in ROMIP.

/pdf/hh-mip-an-enhancement-of-mobile-ip-by-home-agent-handover-1rj643nv8d.pdf

HH-MIP: an enhancement of mobile IP by home agent handover

For mobile multi-hop wireless network, IEEE 802.16j/MR network can not only supply large area wireless deployment, but also provide high quality network service to mobile users. In this paper, we will be focusing on QoS supporting for mobile users in the IEEE 802.16-MR network. The probability of a mobile user who visits a RS is known beforehand. With the same visiting probability of each RS and the system-specified size of the range for bandwidth allocation, BS can calculate the required bandwidth to meet the mobile user's demand and allocate appropriate bandwidth for a mobile user includes the user's current relay station and the nearby relay stations. The range of bandwidth allocation for mobile users is called the Zone in this paper; and the proposed scheme is therefore a Zone-based bandwidth allocation protocol. The simulation results demonstrate that Zone-based bandwidth allocation protocol can reduce QoS degradation and bandwidth re-allocation overhead.

/pdf/a-zone-based-bandwidth-allocation-protocol-in-wimax-multi-2x5vrnsx4h.pdf

Jeng-Yueng Chen

Papers

LBPS: Load-Based Power Saving in the IEEE 802.16e Network

A novel design of instant messaging service extended from short message service with XMPP

Adaptive load-based and channel-aware power saving for non-real-time traffic in LTE

HH-MIP: an enhancement of mobile IP by home agent handover

A Zone-based bandwidth allocation protocol in WiMAX multi-hop relay networks