With the rapid development of the data center, high-performance computing (HPC), and multi-server system, the relevant applications present different requirements and characteristics. The data transmission is difficul...
详细信息
ISBN:
(纸本)9781728176505
With the rapid development of the data center, high-performance computing (HPC), and multi-server system, the relevant applications present different requirements and characteristics. The data transmission is difficult between their interconnection networks, with the urgent demand for the highly converged network adapting to different interconnection networks. Hence, the multi-network convergence becomes an essential trend in the development of the interconnection network. The work proposed a converged network coding sublayer for the Ethernet network and HPC high-speed networks. Firstly, based on the low latency and high-reliability requirements of the HPC high-speed network, we analyzed the relationship between the parameters and the latency of RS code and proposed a new RS(272,257) code for the HPC high-speed network with low latency and high reliability. Then, based on the RS(528,514) code used in 100 Gbps Ethernet and the new RS(272,257) code, the converged interconnection network coding layer was designed. Finally, the work simulated the latency performance of the RS(528,514) code and the new RS(272,257) code and assessed the resource consumption of the converged network coding sublayer, the RS(528,514) coding sublayer, and the RS(272,257) coding sublayer. By the comprehensive assessment of error correction capability, latency performance, and resource consumption, the new RS(272,257) code was an ideal forward errorcorrection code to meet the requirements of the HPC highspeed interconnection network. The converged coding sublayer, configured to support the Ethernet or the HPC high-speed network, was implemented at the cost of finite resources reusing common logic of RS(272,257) and RS(528,514) as much as possible.
In this paper we introduce Neural network coding (NNC), a data-driven approach to joint source and network coding. In NNC, the encoders at each source and intermediate node, as well as the decoder at each destination ...
详细信息
ISBN:
(数字)9781728150895
ISBN:
(纸本)9781728150901
In this paper we introduce Neural network coding (NNC), a data-driven approach to joint source and network coding. In NNC, the encoders at each source and intermediate node, as well as the decoder at each destination node, are neural networks which are all trained jointly for the task of communicating correlated sources through a network of noisy point-to-point links. The NNC scheme is application-specific and makes use of a training set of data, instead of making assumptions on the source statistics. In addition, it can adapt to any arbitrary network topology and power constraint. We show empirically that, for the task of transmitting MNIST images over a network, the NNC scheme shows improvement over baseline schemes, especially in the low-SNR regime.
Multiplication is one of the most fundamental computational problems, yet its true complexity remains elusive. The best known upper bound, very recently proved by Harvey and van der Hoeven (2019), shows that two n-bit...
详细信息
network coding is proved to improve the throughput, decrease network latency and balance the network overhead. Combined with wireless overhearing, some proposed representative schemes on network coding, such as linear...
详细信息
network coding is proved to improve the throughput, decrease network latency and balance the network overhead. Combined with wireless overhearing, some proposed representative schemes on network coding, such as linear network coding and Completely opportunity encoding(COPE). The former scheme is based on complicated linear operation, while the latter is implemented by the way of pairwise XOR-ing which is simple and low efficiency. In order to resolve these problems, we put forward a group-based XOR-ing network coding scheme, which has the characteristics of high efficiency and low *** results and theoretical analysis demonstrate that our scheme has higher throughput gains and lower delay than traditional schemes. In addition, our proposed scheme has the best characteristic of fairness among the state-of-the-art approaches.
作者：
Louai Al-AwamiComputer Engineering Department
Interdisciplinary Research Center for Intelligent Secure Systems King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia
LoRaWAN is a promising loT access technology that is growing in popularity. This study addresses the issue of duplicate packets forwarding by LoRaWAN gateways and proposes a novel forwarding scheme to eliminate forwar...
详细信息
LoRaWAN is a promising loT access technology that is growing in popularity. This study addresses the issue of duplicate packets forwarding by LoRaWAN gateways and proposes a novel forwarding scheme to eliminate forwarding duplicate packets by utilizing inter-flow network coding. The proposed scheme is distributed and requires no coordination between gateways. The proposed scheme is evaluated under different network and traffic conditions. The results show that substantial savings can be achieved in bandwidth leading to enhanced scalability of the network without increasing outgoing traffic.
Many envisioned applications for the Tactile Internet require latencies that cannot be achieved by current wireless networks. In this paper, we present a method to optimize the reliability of a live stream using multi...
详细信息
ISBN:
(纸本)9781538647271
Many envisioned applications for the Tactile Internet require latencies that cannot be achieved by current wireless networks. In this paper, we present a method to optimize the reliability of a live stream using multiple paths. Compared to other approaches, our method does not rely on feedback to achieve the reliability and thus does not add delay for retransmission attempts. We use the diversity of multiple paths to compensate for the loss of capacity in individual paths. By using an FEC code to generate redundant data the transmission is more robust against fluctuations in capacity of single paths. We present an optimization problem to find a rate allocation for the paths that minimizes the interruptions of the stream. The performance is evaluated in an emulated network based on real-world measurements. The evaluation shows that the theoretical values can be achieved with a small margin. The optimized allocation of rates to the paths increases the reliability by up to 12%. With coding the reliability can be increased by up to 20%, depending on the code rate.
network coding is promising to improve the throughput and robustness of video transmission over wireless networks. To address the security issue of network coding based Priority encoding transmission(PET), a special c...
详细信息
network coding is promising to improve the throughput and robustness of video transmission over wireless networks. To address the security issue of network coding based Priority encoding transmission(PET), a special coding design against wiretapping is proposed with hierarchical security. The basic idea is first to randomize partial blocks of each layer and then to encode each layer with inter-layer overlapping coding. The method is characterized by quantifiable security for incremental decoding,and realizes scalability in confidentiality and video transmission, while incurring relatively low computational complexity and bandwidth overhead. A sufficient condition is also presented to design a stronger secure network coded PET system against the known-plaintext attacks. Analysis and evaluation show that the method can be efficient as a new paradigm to secure network coded PET system in realistic applications.
Arguably the most common network communication problem is multiple-unicasts: Distinct packets at different nodes in a network need to be delivered to a destination specific to each packet as fast as possible. The famo...
详细信息
This paper considers the design of network coding schemes for reliable wireless broadcast and multicast transmissions, in which the same packet is broadcast to a group of receivers. network coding across multiple broa...
详细信息
This paper considers the design of network coding schemes for reliable wireless broadcast and multicast transmissions, in which the same packet is broadcast to a group of receivers. network coding across multiple broadcasted packets is employed to generate redundant packets for the broadcast retransmissions so that the lost packets can be recovered. It is assumed that optimal decoders are employed at the receivers and the focus is on the design of short block codes with small numbers of redundant bits. To this end, use if first made of the residual graph representation to calculate the error probability of the optimal decoder. Then two code design schemes are proposed to minimize the error probability, including a low-complexity deterministic greedy code design algorithm as well as a stochastic code construction algorithm inspired by the simulated annealing technique. Extensive simulation studies have been carried out to assess the performance of the proposed schemes. It is seen that for a given number of retransmissions, the proposed network coding schemes can considerably increase the average number of recovered packages per user at the receivers and thereby improve the spectral efficiency over traditional coding methods.
network coding is an effective idea to boost the capacity of wireless networks, and a variety of studies have explored its advantages in different scenarios. However, there is not much analytical study on throughput a...
详细信息
network coding is an effective idea to boost the capacity of wireless networks, and a variety of studies have explored its advantages in different scenarios. However, there is not much analytical study on throughput and end-to-end delay of network coding in multi-hop wireless networks considering the specifications of IEEE 802.11 Distributed Coordination Function. In this paper, we utilize queuing theory to propose an analytical framework for bidirectional unicast flows in multi-hop wireless mesh networks. We study the throughput and end-to-end delay of inter-flow network coding under the IEEE 802.11 standard with CSMA/CA random access and exponential back-off time considering clock freezing and virtual carrier sensing, and formulate several parameters such as the probability of successful transmission in terms of bit error rate and collision probability, waiting time of packets at nodes, and retransmission mechanism. Our model uses a multi-class queuing network with stable queues, where coded packets have a non-preemptive higher priority over native packets, and forwarding of native packets is not delayed if no coding opportunities are available. Finally, we use computer simulations to verify the accuracy of our analytical model.
暂无评论