We consider a two-unicast-Z network over a directed acyclic graph of unit capacitated edges;the two-unicast-Z network is a special case of two-unicast networks where one of the destinations has apriori side informatio...
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This paper presents an energy-efficient solution to overcome packet loss in Wireless Sensor networks (WSNs) by adding seed-based Random Linear network coding to MQTT for Sensor networks (MQTT-SN). Whereas most sensors...
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This paper presents an energy-efficient solution to overcome packet loss in Wireless Sensor networks (WSNs) by adding seed-based Random Linear network coding to MQTT for Sensor networks (MQTT-SN). Whereas most sensors integrated in common WSN devices consume little energy, using the radio is costly. To increase battery lifetime, devices try to minimize their radio uptime, while still satisfy timeliness and reliability of delivered data. The proposed approach uses an optimized seed-based intrasession network coding scheme for Forward Error Correction to shorten the sensor node's radio uptime, reducing its power consumption. The presented approach is conform to the MQTT-SN specification and, thus, interoperable with existing systems. Since the implementation is based on the application layer, it is seamlessly deployable via Over-The-Air-Programming. The presented evaluation is based on collected traces from a real-world WSN deployment in the context of Precision Agriculture. Radio uptime and power consumption measurements in an experimental testbed confirm the achieved benefits.
Utilizing device-to-device (D2D) connections among mobile devices is promising to meet the increasing throughput demand over cellular links. In particular, when mobile devices are in close proximity of each other and ...
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Inter-datacenter transport network is very band-width and delay demanding. The data transferred over such a network is also highly QoS-exigent mostly because a huge volume of data should be transported transparently w...
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Inter-datacenter transport network is very band-width and delay demanding. The data transferred over such a network is also highly QoS-exigent mostly because a huge volume of data should be transported transparently with regard to the application user. To avoid the data transfer failure, a backup path should be reserved. No re-routing delay should be observed. A dedicated 1 + 1 protection is however not applicable in inter-datacenter transport network because of the huge spare capacity. In this context, we propose a survivable virtual network with minimal backup based on network coding (1 {direct+} 1) and solve it using a modified Dijkstra-based heuristic. 1 {direct+} 1 network coding is the minimal spare capacity design method for backup links.
network coding is all about combining a variety of packets and forwarding as much packets as possible in each transmission operation. The network coding technique improves the throughput efficiency of multi-hop wirele...
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network coding is a potential method that numerous investigators have move forwarded due to its significant advantages to enhance the proficiency of data communication. In this work, utilize simulations to assess the ...
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network coding is a potential method that numerous investigators have move forwarded due to its significant advantages to enhance the proficiency of data communication. In this work, utilize simulations to assess the execution of various network topologies employing network coding. By contrasting the results of network and without network coding, it insists that network coding can improve the throughput, end-to-end delays, Packet Delivery Rate(PDR) and consistency. This paper presents the comparative performance analysis of network coding such as, XOR, LNC, and RLNC. The results demonstrates the XOR technique has attractive outcomes and can improve the real time performance metrics i.e.;throughput, end-to-end delay and PDR by substantial limitations. The analysis has been carried out based on packet size and also number of packets to be transmitted. Results illustrates that the network coding facilitate in dependence between networks.
The wide availability of power distribution cables provides an interesting no-new-wires communication channel. However, its electrical characteristics make it a harsh environment for the data transmission purpose and ...
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Delay linear network coding (DLNC) is the problem of network coding, in which coding operation takes time. A coherent DLNC network, where coding operation at each node takes 1 unit time, can be modeled as a linear tim...
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ISBN:
(纸本)9781509015740;9781509015733
Delay linear network coding (DLNC) is the problem of network coding, in which coding operation takes time. A coherent DLNC network, where coding operation at each node takes 1 unit time, can be modeled as a linear time invariant (LTI) system. Based on the Gauss Jordan elimination, we develop an algorithm to reconstruct source processes and introduce new concepts, which are decoding delay and transmission rate. The network error control problem in such networks can be done by extending the classical network error-correcting code (NEC). We construct a DLNC based linear operation channel (LOC) and apply the distance measure proposed in the previous works to our LOC. It turns out that extension of classical NEC works well for the case of DLNC. We also develop a codebook design algorithm, which achieves maximum possible size.
Space-Time network coding (STNC) is a time division multiple access (TDMA)-based scheme that combines network coding and space-time coding by allowing relays to combine the information received from different sources ...
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Space-Time network coding (STNC) is a time division multiple access (TDMA)-based scheme that combines network coding and space-time coding by allowing relays to combine the information received from different sources during the transmission phase and to forward the combined signal to a destination in the relaying phase. However, STNC schemes require all the relays to overhear the signal transmitted from all the sources in the network and also a large number of time-slots to achieve full diversity in a multipoint-to-multipoint transmission, which is particularly challenging for large cellular networks. In this paper, we exploit a basic knowledge of the network topology, i.e. the knowledge of the base stations overheard by other base stations and users, to reduce drastically the number of time-slots. Our results show that our scheme is able to increase the spectral efficiency with a marginal decrease of the spatial diversity compared to traditional STNC.
In this paper, we propose a solution to the distributed topology formation problem for large-scale sensor networks with multi-source multicast flows. The proposed solution is based on game-theoretic approaches in conj...
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