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LTE-M, which is an abbreviated version of LTE-MTC(Machine Type Communication) can be said to have a variety of applications, including a large number of heterogeneous interconnection of large-scale network equipment. One of the most prominent problems is that the machines may have a large amount of access requests in a short time, which can easily lead to network congestion. At present, the contention-based...
In this paper, we propose a general delay and stability performance analysis in Heterogeneous Cellular Caching Networks (HCCNs), based on queuing theory. We introduce new performance metrics in HCCNs and propose an optimization problem which minimizes the average experienced delay for users by ensuring the stability of the network. In addition, from the design perspective, we address the problem of...
Competitive environment has led popularity of VoIP over WiMAX due to its large transmission bandwidth coverage, and Quality of Service (QoS) support. For voice calls applications such as MSN Messenger, Google Talk, and Skype, VoIP is an emerging technology for WiMAX networks. In this kind of network, performance analysis of node mobility depends on network connectivity. This paper has considered horizontal...
This paper deals with the movement pattern of mobile sinks in Wireless Sensor Network for efficient collection of information by the mobile sinks. We propose a path determination algorithm for the sinks to move in the network and cover the whole network area as much as possible. Multiple mobile sinks will move in their defined path based on the path determination algorithm to collect data from static...
Power conservation is a critical issue in wireless networks as the mobile devices are battery constrained and therefore researchers have been constantly working for saving power by following standard Type I, II and III sleep scheduling algorithms. In this paper we have proposed a new improved algorithm of Traffic Dependent Power Conservation, which proactively divides the MSSs(Mobile Subscriber Stations)...
Rapid technological advances and innovations in the area of autonomous systems push the researchers towards autonomous networked systems with emphasis on Wireless Sensor Networks (WSNs). In WSN event-driven applications, it is critical to report the detected events in the area, resulting in sudden bursts of traffic due to occurrence of spatially-correlated or multiple events, causing loss of data...
In this paper, two novel energy efficient resource allocation schemes are proposed for beyond next generation mobile networks. The schemes take into account the clustering capability of base stations before assigning users to the base stations. A topology management scheme that adjusts the number of active base stations in accordance with the traffic load and also responds to QoS deterioration is...
In next generation wireless networks like WiMAX, a dynamic Call Admission Control (CAC) plays an important role to ensure Quality of Service (QoS) of existing users and to efficiently utilize network resources. We propose a predictive CAC namely Wireless Fair Intelligent Admission Control (WFIAC) that admits or rejects a new incoming connection base on resource availability and load in the network...
Wireless sensor networks (WSNs) are gaining more interest in variety of applications. Of their different characteristics and challenges, network lifetime and efficiency are the most considered issues in WSN-based systems. The scarcest WSN's resource is energy, and one of the most energy-expensive operations is route discovery and data transmission. This paper presents a novel design of a cooperative...
In WiMAX architecture to avoid congestion at the base station, a mechanism namely WiMAX Fair Intelligent Congestion Control (WFICC) was proposed in [11]. WFICC ensures that the traffic is scheduled in such a way that the base station output buffer operates around a target operating point, without violating the Quality of Service (QoS) requirements of connections. However, only preliminary results...
Machine-Type Communications (MTC) is a rapidly growing technology, which is expected to generate significant revenues to mobile network operators. In particular, smart grid is predicted to become one of the key MTC use cases that involves meters autonomously reporting information to a grid infrastructure. With this research, we consider a typical smart metering MTC application scenario in the context...
In many applications it is desirable to deploy unmanned autonomous vehicles to remote real-world locations, at considerable distance from any fixed infrastructure, rendering direct communication impossible; for example in the Wilderness Search and Rescue (WiSaR) scenario. However, data transfer between such vehicles and other participants is required for control, safety, monitoring progress and sharing...
It is promising to enhance the spatial domain diversity for the conventional coordinated multi-point (CoMP) transmission/reception over the heterogeneous network structure of relay stations and home base stations in addition to conventional base stations. However, supporting potentially massive mobile stations (MSs) is the critical challenge in the heterogeneous network CoMP (Het-CoMP), which results...
Base station (BS) sleep mode operation is one of the effective ways to save energy, but it may lead to longer delay to the customers. In order to evaluate the tradeoffs between energy consumption and customer delay, we model the BS sleep mode operation as an N-policy M/G/1 vacation queue with setup and close-down times, where the BS enters sleep mode if no customers arrive during the close-down time...
In this paper, we have observed that the performance analysis of one of the most challenging security issue for wireless network i.e. Black hole attack. WiMAX-WLAN interface will play a important role in the NGN (Next generation Network) scenario. This attack is possible in WiMAX-WLAN interface network i.e. in current scenarios. In this paper we analyzed the performance analysis of Performance Analysis...
Cellular data networks are experiencing a serious capacity crunch in the face of exponential increase in mobile data traffic volume. New traffic management techniques are needed to improve network and user perceived performance. In this work, we consider the existence of a higher-layer, agent-based scheduling system that could potentially delay scheduling of low priority flows at peak loads. The priorities...
This paper proposes three algorithms based on the contention tree algorithm to improve the system performance by utilizing the different additional of feedback information. These three algorithms are derived from adding of skipped slots and/or adaptive frame size strategies. Average access delay is analyzed to evaluate the system performance which is measured in term of the number of used slots in...
In this paper, the influence of feedback channel delay on system throughput of the cooperative multi-cell system with adaptive beamforming selection is discussed. On the one hand, multi-cell cooperative processing (MCP) has the potential to boost spectral efficiency and improve fairness among users. However, the traditional centralized multi-cell cooperative scheme, where a central processing unit...
We consider the problem of reducing delays in block transmissions of packets over multicast erasure channels in heterogeneous networks using relay stations. The macro base station performs random linear network coding over a block of packets which are relayed to the relay station which broadcasts the packets to the users. We propose a fluid approximation to our problem, and obtain the optimal solution...
Network connectivity, as a fundamental issue in a wireless sensor network(WSN), has been receiving considerable attention during the past decade. Most works focused on how to maintain full connectivity while conserving network resources. However, full connectivity is actually a sufficient but not necessary condition for many WSNs to communicate and function successfully. In addition, full connectivity...
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