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In this paper, we propose a network coding solution to improve transmission reliability of scalable video coding (SVC) streams over lossy networks. Since scalable video coding produces various levels of quality with variable bitrates, we design a prioritized network coding scheme combining different encoding approaches: generation-based and sliding window based schemes. We carried out a performance...
Oblivious RAM (ORAM) is a primitive for hiding storage access patterns in the context of software protection. With the trend of cloud computing, ORAM also has important applications in privacy-preserving cloud storage applications. Many ORAMs for cloud storage have been proposed to improve efficiency and security. However, data availability, data confidentiality, and data integrity have not been simultaneously...
We address the single-source-destination routing problem in a mesh network with a broadcast channel, time-division multiplexing (TDM) and no spatial reuse, which is a special type of the PLC channel. First, the outer bound on the achievable data rate is evaluated. We show that the routing protocols (RPs) with static routing do not allow approaching this data rate limit. Then, we study RP with opportunistic...
Multimedia streaming applications have high throughput requirement and stringent Quality-of-Service (QoS) guarantee. In this paper, we aim at designing a novel transmission and retransmission scheme, which integrates both the Network Coding and the Superposition Coding for wireless video broadcast networks by packet-erasure channel. Specifically, the Scalable Video Coding (SVC) technology is introduced...
This paper studies the problem of how to efficiently minimize network coding resource. A modified particle swarm optimization (PSO) algorithm is proposed to tackle the problem, with the concept of path-relinking (PR) integrated into the evolutionary framework. As an efficient local search heuristic that makes use of problem-specific domain knowledge, PR helps strike a better balance between global...
With the further development and utilization of space resource, space communications nowadays are increasingly becoming irreplaceable networking technologies for highresolution earth observation, satellite navigation and deep space exploration where big data is produced. This has created great challenges in ensuring the security and reliability of some sensitive data. In order to solve some problems...
Due to asynchronous packet transmissions and rate mismatch among different coding flows in existing opportunistic network coding architectures, such as COPE, the amount of packets which can be coded together may be insufficient and thus the performance gain of network coding cannot be fully exploited. One feasible solution for this problem is to make coding nodepurposely delay some packet transmissions...
Random linear network coding (RLNC) has been shown to efficiently improve the network performance in terms of reducing transmission delays and increasing the throughput in broadcast and multicast communications. However, it can result in increased storage and computational complexity at the receivers end. In our previous work we considered the broadcast transmission of large file to N receivers. We...
In recent years, a significant amount of research has been conducted to explore the benefits of network coding in different scenarios, from both theoretical and simulation perspectives. In this paper, we utilize queueing theory to propose an analytical framework for bidirectional unicast flows in multi-hop wireless mesh networks, and study throughput of inter-flow network coding. We analytically determine...
A lot of research shows that network coding can significantly improve the performance of multi-cast transmission. However, due to the inherent disadvantage of network coding, it is very vulnerable to pollution attacks in which adversaries can inject bogus data. Moreover, those bogus data will be used with legitimate data at the downstream nodes, resulting in the failure of decoding original data as...
The recent research studies showed that inter-layered network coding is a promising approach to provide the unequal error protection for scalable video multicast under the channel heterogeneity. The selection of the optimal transmission distribution performed at eNB increases the system performance with the cost of time and computational complexities. In this paper, we propose an optimal transmission...
Network coding is becoming a very important technology to improve the reconstructing performance of distributed storage systems due to its high reliability and low redundancy. Update is a typical and important operation involved in the network-coding-based systems. However, the overhead incurred by the update operation has a significant impact on the system performance. Traditionally, the small updated...
The rapid penetration of cloud and distributed computing technology is accelerating the need for one-to-many file transfers for sharing and duplicating data and applications among distributed data centers in an efficient manner. The purpose of our work is to develop a scheme to transfer a largesized file from a single sender to multiple receivers over an OpenFlow-based network as quickly as possible...
Power line communication systems face several challenges which degrade data communication quality. To overcome such issues, we propose CodePLC, a network coding Power Line Communication MAC protocol. We use a single relay node to intermediate communication, storing, and forwarding linear combinations of data packets. We evaluate CodePLC performance through simulations of a common topology for a PLC...
Coded packet networks allow for proactive injection of redundant packets to compensate for packet loss. Link metrics are usually based on the estimated transmission counter (ETX). This metric is used to determine the expected number of coded packets needed, but does not make guarantees for a specific decoding probability. In this paper we show that relying on the ETX metric leads to a surprisingly...
In this paper, a flexible scheme with exclusive-OR (XOR) coding is suggested for improving error performance in two-way relay networks. The sources, exchanging their packets through relay(s), encode multiple packets into one packet and the encoded packet helps correct decoding of actual packets exchanged between sources. We also employ orthogonal frequency division multiplexing in the considered two-way...
This paper presents a smooth way to include Network Coding in the Constrained Application Protocol (CoAP) for large resource transmissions. Devices in the Internet of Things usually communicate using short messages with little data. In some cases, for example, requesting firmware updates, bigger resources need to be transferred. CoAP's recently finalized blockwise transfer scheme can handle large...
Random linear network coding simplifies routing decisions, improves throughput, and increases tolerance against packet loss. A substantial limitation, however, is delay: decoding requires as many independent linear combinations as data blocks. Hierarchical network coding purportedly solves this delay problem. It introduces layers to decode prioritized data blocks early, which may benefit video streaming...
Generation-based network coding is an important realization of network coding in practical networks. Due to the special data processing of generations, it is not only faced with intra-generation pollution attacks, but also is vulnerable to inter-generation pollution attacks. To solve this problem, we propose new homomorphic signature schemes for generationbased network coding. By means of the lattice...
We present results on the performance of a network-coding based method for broadcast file delivery in an ad hoc network consisting of half-duplex packet radios. Our technique allows a receiver to exploit the broadcast nature of the wireless medium by overhearing packets sent by a node that is not necessarily one of the receiver's designated relays. Delivery of the file to the remote destinations is...
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