To analyze the performance of network coding with multi-generation mixing in the cable network, this paper establishes the Poisson model firstly from the time-delay context. Then it proves that the input and output pr...
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To analyze the performance of network coding with multi-generation mixing in the cable network, this paper establishes the Poisson model firstly from the time-delay context. Then it proves that the input and output processes of coding packets complying with Poisson distribution and finally concludes the mathematical relationship between the decoding delay and the decoding success rate. The simulation results show that the decoding success rate of the wired network can reach 100% when the time delay is reasonable.
This paper proposes a hybrid encryption scheme for multi-relay (MR) physical-layer network coding (PNC). Based on the three-relay (3R) bidirectional communication model, first, we discuss the throughput performance of...
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This paper proposes a hybrid encryption scheme for multi-relay (MR) physical-layer network coding (PNC). Based on the three-relay (3R) bidirectional communication model, first, we discuss the throughput performance of the PNC compared with the traditional scheme (TS) and network coding (NC) system. Through the analysis of transmission efficiency, the superior throughput of the PNC system is demonstrated. Then, to further improve the security of the communication system, we give a scheme of advanced encryption standard (AES) and Rivest-Shamir-Adleman (RSA) hybrid encryption, namely AR hybrid encryption. Finally, we embed the AR hybrid encryption into the multi-relay PNC communication system. At relay nodes of the AR-PNC system, we focus on solving the problem of signal mapping. In the meantime, to reduce the performance loss caused by the increase of relay nodes, we exploit Low-Density Parity-Check (LDPC) code to enhance the decoding accuracy. The experimental results and security analysis show that the proposed scheme can boost the system throughput and transmission dependability and stronger the security of the communication system.
Deep learning methods are widely used in synthetic aperture radar (SAR) image recognition and have achieved high recognition accuracy on some public datasets. However, the existing deep learning methods do not really ...
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Batched network coding (BNC) is a low-complexity variant of random linear network coding (RLNC) that encodes the file to be sent into batches, each consisting of a few coded packets. Although many works are focusing o...
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ISBN:
(数字)9781665421591
ISBN:
(纸本)9781665421607
Batched network coding (BNC) is a low-complexity variant of random linear network coding (RLNC) that encodes the file to be sent into batches, each consisting of a few coded packets. Although many works are focusing on the overhead reduction of RLNC, the overhead reduction for BNC is rarely studied. Different types of overheads in BNC interact and can potentially increase the overall overhead significantly. In this paper, we formulate a minimization problem for BNC on the number of symbols we need to send at the source node by tuning the number of packets divided from the file, which has the same meaning as tuning the packet size. It is hard to optimize the discrete zigzag-like objective efficiently. However, in practical scenarios, the encoder has to optimize the problem in real-time for different file size and redundancy requirements. We propose an efficient heuristic for this purpose and show its accuracy by numerical evaluations.
Mobile small cells that are enabled with network coding (NC) are seen as a potentially useful technique for Fifth Generation (5G) networks, since they can cover an entire city and can be put up on demand anywhere, any...
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ISBN:
(纸本)9781665489638
Mobile small cells that are enabled with network coding (NC) are seen as a potentially useful technique for Fifth Generation (5G) networks, since they can cover an entire city and can be put up on demand anywhere, any time, and on any device. Despite numerous advantages, significant security issues arise as a result of the fact that the NC-enabled mobile small cells are vulnerable to attacks. Intrusions are a severe security threat that exploits the inherent vulnerabilities of NC. In order to make NC-enabled mobile small cells to realize their full potential, it is essential to implement intrusion detection systems. When compared to homomorphic signature or hashing systems, homomorphic message authentication codes (MACs) provide safe network coding techniques with relatively smaller overheads. A number of research studies have been conducted with the goal of developing mobile small cells that are enabled with secure network coding and coming up with integrity protocols that are appropriate for such crowded situations. However, the intermediate nodes alter packets while they are in transit and hence the integrity of the data cannot be confirmed by using MACs and checksums. This research study has analyzed numerous intrusion detection models for NC enabled small cells. This research helps the scholars to get a brief idea about various intrusion detection models.
For data streaming applications, existing solutions are not yet able to close the gap between high data rates and low delay. This work considers the problem of data streaming under mixed delay constraints over a singl...
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ISBN:
(数字)9781665421591
ISBN:
(纸本)9781665421607
For data streaming applications, existing solutions are not yet able to close the gap between high data rates and low delay. This work considers the problem of data streaming under mixed delay constraints over a single communication channel with delayed feedback. We propose a novel layered adaptive causal random linear network coding (LAC-RLNC) approach with forward error correction. LAC-RLNC is a variable-to-variable coding scheme, i.e., variable recovered information data at the receiver over variable short block length and rate is proposed. Specifically, for data streaming with base and enhancement layers of content, we characterize a high dimensional throughput-delay trade-off managed by the adaptive causal layering coding scheme. The base layer is designed to satisfy the strict delay constraints, as it contains the data needed to allow the streaming service. Then, the sender can manage the throughput-delay trade-off of the second layer by adjusting the retransmission rate a priori and posterior as the enhancement layer, that contains the remaining data to augment the streaming service’s quality, is with the relax delay constraints. We numerically show that the layered network coding approach can dramatically increase performance. We demonstrate that LAC-RLNC compared with the non-layered approach gains a factor of three in mean and maximum delay for the base layer, close to the lower bound, and factor two for the enhancement layer.
This paper studies a linear physical-layer network coding multiple access (LPNC-MA) scheme that is capable of achieving any rate-tuples in the MAC capacity region without receiver-iterations or time-sharing. We propos...
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ISBN:
(数字)9781665421591
ISBN:
(纸本)9781665421607
This paper studies a linear physical-layer network coding multiple access (LPNC-MA) scheme that is capable of achieving any rate-tuples in the MAC capacity region without receiver-iterations or time-sharing. We propose to utilize q-ary irregular repeat accumulate (IRA) codes over finite integer field-s/rings and q-PAM as the underlying coded-modulation. The receiver sequentially computes M network coded (NC) message sequences, where the previously computed message sequence is used as side information in computing subsequent ones. All users’ messages are then recovered by solving the computed M NC messages via the inverse of the NC coefficient matrix. A joint nested code construction and EXIT chart based code optimization method is developed, yielding near-capacity performance (within 1.1 dB the capacity limit for three users). For fading MAC, we propose a pragmatic method for identifying the network coding coefficient matrix that maximizes the mutual information. Numerical results demonstrate that the frame error rate (FER) of LPNC-MA is within a fraction of dB the outage probability of fading MAC capacity. For a relatively large number of users, it is shown that LPNC-MA remarkably outperforms NOMA-SIC and IDMA in the high spectral efficiency regime, while avoiding the big-loop receiver iteration.
In this paper, we propose a joint design of polar codes and physical-layer network coding in visible light communication (VLC) system. Polar codes could correct bit errors and enhance the reliability, and physical-lay...
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In this paper, we propose a joint design of polar codes and physical-layer network coding in visible light communication (VLC) system. Polar codes could correct bit errors and enhance the reliability, and physical-layer network coding could reduce time slots required in the bidirectional communication and improve the transmission efficiency. The simulation results show that our scheme approaches the bit error rate (BER) of the conventional scheme, and further increases the throughput by 100% and reduces the equipment cost by 50%. The proposed design enhances the performance of VLC system noticeably and is more suitable for VLC system with the low-latency demand.
As a network transmission mechanism, network coding has the merits of high throughput, good robustness and fast speed compared with network routing technology, but network coding is vulnerable to pollution attacks. Be...
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For Physical-layer network coding (PNC) with high-order modulation, the problem of ambiguity mapping is a focus field. In this paper, we present a PNC with Reconfigurable Superposition Mapping (RSM-PNC) scheme. Based ...
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For Physical-layer network coding (PNC) with high-order modulation, the problem of ambiguity mapping is a focus field. In this paper, we present a PNC with Reconfigurable Superposition Mapping (RSM-PNC) scheme. Based on this scheme, a two-way relay communication system model consisting of the source and relay nodes using 16QAM modulation is constructed. In addition, the PNC demodulation and mapping rule at the relay node is displayed, the decoding rule at source node is redesigned, and the calculation formula of relay symbol error rate (SER) under Additive White Gaussian Noise (AWGN) is derived as well. The simulation results show that the proposed RSM-PNC scheme not only solves the problem of ambiguity mapping, but also has more advantages compared with PNC using Hierarchical Modulation scheme.
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