In this letter, we study the problem of distributing data to a group of partially connected cooperative D2D networks using network coding. In such a scenario, the transmission conflicts occur from simultaneous transmi...
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In this letter, we study the problem of distributing data to a group of partially connected cooperative D2D networks using network coding. In such a scenario, the transmission conflicts occur from simultaneous transmissions of multiple devices, where the scheduling decision should be made not only on the encoded packets but also on the set of transmitting devices. We formulate the joint optimization problem over the set of transmitting devices and the packet combinations with a conflict-free graph model, which contains both coding conflict and transmission conflict. We also propose a heuristic solution for this setup by finding the maximum independent set in the conflict-free graph. Simulation results show that our coding scheme significantly reduces the number of transmission slots.
This letter considers a multi-source multi-relay network in which relay nodes employ a coding scheme based on random linear network coding on source packets and generate coded packets. If a destination node collects e...
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This letter considers a multi-source multi-relay network in which relay nodes employ a coding scheme based on random linear network coding on source packets and generate coded packets. If a destination node collects enough coded packets, it can recover the packets of all source nodes. The links between source-to-relay nodes and relay-to-destination nodes are modeled as packet erasure channels. Improved bounds on the probability of decoding failure are presented, which are markedly close to simulation results and notably better than previous bounds. Examples demonstrate the tightness and usefulness of the new bounds over the old bounds.
This paper proposes a novel buffer-aided link selection scheme based on network coding in the multiple-hop relay network. The proposed scheme significantly increases transmission throughput by applying data buffers at...
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This paper proposes a novel buffer-aided link selection scheme based on network coding in the multiple-hop relay network. The proposed scheme significantly increases transmission throughput by applying data buffers at the relays to decrease the outage probability and using network coding to increase the data rate. The closed-form expressions of both average throughput and packet delay are successfully derived. The proposed scheme not only has significantly higher throughput than both the traditional and existing buffer-aided max-link schemes but smaller average packet delay than the max-link scheme as well, making it an attractive scheme in practice.
LTE-Advanced heterogeneous networks enable a uniform broadband experience to users flexibly anywhere in the network by using a mix of large and small cells - i.e., macro, pico, femto and relay stations. In this paper,...
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ISBN:
(纸本)9781509048922
LTE-Advanced heterogeneous networks enable a uniform broadband experience to users flexibly anywhere in the network by using a mix of large and small cells - i.e., macro, pico, femto and relay stations. In this paper, we propose a novel network coding-based for mobile content uploading, where multiple user equipments upload their own content toward the eNodeB in LTE-Advanced relay networks. network coding has been considered as a promising solution in next generation networks because of the significant improvement in the transmission rate and reliability. The network coding enables an intermediate node having the capability of encoding incoming packets rather than simply forwarding. However, the advantages come at the cost of high computational, storage costs and coding vector overhead. The two former drawbacks can be solved easily by the fast development of current smart users and relay with high capability on computation and storage. The last issue of coding vector overhead still remains as many packets are encoded together using a linear combination since each packet needs to carry a large size of the header to store the information of the coding vector. We propose random overlapped chunked code for enhancing the transmission rate and reliability under the constraint of coding vector overhead. Furthermore, the encoding and decoding processes can be operated with low complexity. The complete transmission consists of two phases: users upload the content to the relay; the relay performs the proposed random overlapped chunked code of different coming streams from users and forwards the network-coded packets to the eNodeB. For performance evaluation, we run various simulations along with analysis to show that our proposal outperforms current schemes in terms of decoding probability.
Non-binary turbo codes promise excellent performance for a wide range of applications and environments, but research in this area is sparse. The performance of a non-binary turbo code defined in GF (4) on a two-way wi...
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Non-binary turbo codes promise excellent performance for a wide range of applications and environments, but research in this area is sparse. The performance of a non-binary turbo code defined in GF (4) on a two-way wireless relay channel (TWRC) employing physical-layer network coding, which is affected by impulsive noise is investigated. Simulation results for binary and non-binary turbo codes are presented and validated with an error floor analysis at the relay of the TWRC and it is observed that non-binary turbo codes significantly outperform binary turbo codes at low signal-to-noise ratios.
A Mobile Ad Hoc network(MANET) is a acquisition of nodes without wires and stable infrastructure. All nodes in this network are obliged with energy. It is important factor to reduce the nodes energy consumption. In cl...
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ISBN:
(纸本)9781538632444
A Mobile Ad Hoc network(MANET) is a acquisition of nodes without wires and stable infrastructure. All nodes in this network are obliged with energy. It is important factor to reduce the nodes energy consumption. In cluster based routing protocol, some nodes imbibes more energy compared to other nodes and may cause shutdown. network coding improves the performance of the network. The coding at all nodes increases the overhead problem. A network coding aware energy efficient cluster based routing protocol(ECCRP) is proposed to reduce consumption of energy and to improve network life-time. In this scheme, network coding technique is exerted to existing cluster based routing protocol. The energetic cluster head is chosen, and the coding is done at cluster head. The flow based structure is also introduced to further improve the opportunities of coding.
Itinerary plan determines the order of locations that controllable-mobile sink(s) has to sojourn at them, where is a challenging issue especially for the resource constrained Wireless Sensor networks (WSNs). Despite o...
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Itinerary plan determines the order of locations that controllable-mobile sink(s) has to sojourn at them, where is a challenging issue especially for the resource constrained Wireless Sensor networks (WSNs). Despite of approved advantages for collecting sensed information by the mobile sink(s), itinerary planning may effect on other techniques, hence, it should be designed with considering impressible techniques such as network coding. This paper proposes an optimal itinerary plan for mobile sinks in the network-coding-based WSNs. Although this optimization can not be solved in polynomial time, but the mathematical formulation can help us estimate the problem characteristic and figure out the firmness of it. This optimization leads to less energy consumption and increases the lifetime of network-coding-based WSNs. Since, there exist restricted processing resources in WSNs, the optimal solving of this problem is impractical in large-scale WSNs and so, a genetic algorithm is proposed. Results illustrate that proposed genetic algorithm converges to the optimal solution with an appropriate accuracy in less execution time. Moreover, the simulation results demonstrate that proposed approaches have significantly lower energy consumption and consequently more lifetime in comparison with conventional ones where are not considered network coding. (C) 2017 Elsevier B.V. All rights reserved.
Physical-layer network coding (PNC) is now well-known as a potential candidate for delay-sensitive and spectrally efficient communication applications, especially in two-way relay channels (TWRCs). In this paper, we p...
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Video streaming over mobile ad-hoc networks is becoming a highly important application for reliably delivering the content between the user and the content storage node. The key challenge is, hence, to address the imp...
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Satellite on-board network switch technology is one of the key technologies of satellite network system. Orthogonal Frequency Division Multiplexing has high spectrum utilization and can outperform ant
ISBN:
(纸本)9781467389808
Satellite on-board network switch technology is one of the key technologies of satellite network system. Orthogonal Frequency Division Multiplexing has high spectrum utilization and can outperform ant
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