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In this paper, we study a class of wireless broadcast networks where the source intends to send a common file to a group of closely-located receivers. In such networks, reliable file distribution can be achieved either via source retransmissions or user cooperations based on peer-to-peer communications. Various existing schemes are reviewed and compared in terms of feedback load, implementation complexity,...
In this paper we introduce an scheme which combines device-to-device communications nodes which act as relays for a cellular user (CU) located on the cell boundary. The proposed system works as an overlay cellular network. The CU having weak channel towards the base station exploits the availability of a pair of wireless terminals intending to communicate directly with each other. These intermediate...
With network coding, data flows from the source to the destinations may be jointly coded in some intermediate nodes to achieve the maximum network capacity. There is scarcely any theory to systematically model and evaluate the loss of network coding. Without such a theory, the analysis of network coding under various settings is far from practical. To fill the vacancy, we introduce a loss model into...
It seems impossible to endow opportunistic characteristic to quantum network on the basis that quantum channel cannot be overheard without disturbance. We propose an opportunistic quantum network coding scheme by taking full advantage of channel characteristic of quantum teleportation. On one hand, it utilizes quantum channel for the secure transmission of quantum states and can detect eavesdroppers...
Considering the problem of how to efficiently transmit unknown quantum states in multi-unicast networks, we propose a nonlinear quantum network coding scheme with classical communication resource. On the conditions of free classical communication between adjacent nodes in a network, as well as unlimited capacities of classical channels, perfect quantum network coding is available. By means of local...
Energy and throughput optimization occupies an important place in the research area of Wireless Sensor Networks (WSNs). These networks are a class of useful but challenging networks. Combining Network Coding (NC) and efficient scheduling in the MAC layer of such networks gives more efficiency and copes with the problem of energy waste and inefficiency management as well as transmission's lose and...
We consider the problem of multicasting information from a source to a destination over a multihop network of intermediate relays. However, some of the relays are untrustworthy and may be subject to eavesdropping. The source wishes to enlist their help while keeping the message secret against the eavesdropper. By employing random linear network coding at the relays, the problem is modeled as a noncoherent...
In this work, we study a Compound Multiple Access Relay Channel (C-MARC). The system is a simultaneous multicast network where all destinations are intended to receive and decode signals from all transmitters. Particularly, we focus on the model of two transmitters communicating, simultaneously, with two destinations with the help of a half-duplex relay. We extend and adapt the lattice-based compute-and-forward...
Network coding has the potential to improve the performance of current and future communication systems (including transportation and storage) and is currently even considered for communication architectures between the individual processors on same board or different boards in close proximity. Despite the fact that single core implementations show already comparable coding speeds with standard coding...
The Index Coding problem can be considered as one of the basic problems in information theory. In this problem a relay node needs to deliver a set of packets to a set of client over a broadcast wireless channel. Each client might posses some "side information" related to the transmissions by the relay node. The goal is to minimize number of transmissions from the relay node by taking advantage...
In this paper, we propose a new distributed rateless coded collaboration, named DRCC, for packet transmission in an energy-limited satellite relay network. The rateless degree distributions on primary and secondary links are analyzed by AND-OR tree technique. Linear programming and multi-objective programming are both formulated to find the optimal solutions to minimize decoding error probability...
Buffer-aided network coding (NC) has been proposed as an effective method to improve retransmission efficiency. In this way, the correctly received undecodable NC combined retransmission packets are waited in the buffer for a future network decoding opportunity rather than delete. However, existing buffer-aided approaches fail to consider the buffer status and the latest feedback in the next round...
Physical Layer Network coding (PLNC) can significantly improve network performance, but some security issues arise due to the limited information available to the forwarders. This paper analyses authentication in networks with PLNC and show theoretical and practical security limits. In particular, we obtain a lower bound for the probability of an attacker being able to insert a false message such...
In network coding theory, when wiretapping attacks occur, secure network coding is introduced to prevent information from being leaked to adversaries. In practical network communications, secure constraints vary with time. How to effectively deal with information transmission and information security simultaneously under different security-levels is introduced in this paper as variable-security-level...
By reducing the need to perform multi-hop routing over long communication paths, the use of mobile data gathering devices in highly distributed wireless sensor networks (WSNs) can both save energy and cut down on the number of nodes that need to be deployed. However, reliable data deliver to mobile devices remains a challenging problem, especially in WSN environments that have a high bit error rate...
Cloud computing Concept has been recognized as the next generation computing infrastructure. In addition, the explosive expansion of mobile devices usage around all over the world leads to more requirements in terms of resources, environment, and security. Therefore, mobile cloud computing (MCC) paradigm emerges, and it is considered as the future technology for mobile services and applications. Furthermore,...
The boost of wireless technology brings dramatic growth for Vehicular ad-hoc networks(VANETs). The effective routing and forwarding protocol is critical for the performance of VANETs thus influence the automatic driving and information distribution. The dynamic characteristic of vehicle to vehicle(V2V) communications makes it hard to maintain a reliable path between vehicles. In order to improve transmission...
Network coding is a new communication paradigm which allows network nodes not only to forward packets but also to combine them together to reduce the number of transmissions. COPE has been the first network coding scheme designed for unicast traffic in wireless networks. COPE-based network coding-aware routing optimization has been proposed to improve network performances. However, it is interesting...
How to effectively distribute and share increasingly large volumes of data in large-scale network applications is a key challenge for Internet infrastructure. Although NDN, a promising new future internet architecture which takes data oriented transfer approaches, aims to better solve such needs than IP, it still faces problems like data redundancy transmission and inefficient in-network cache utilization...
To solve the problem that global encoding kernels for the edges have great changes for variable-rate linear broadcast network coding, the concept of universal global encoding kernel is put forward in this paper. And the construction algorithm of such universal global encoding kernel is proposed based on the algorithm of variable-rate linear broadcast network coding. In this algorithm, the same local...
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