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Network coding has been proposed as an alternative to the conventional store-and-forward routing paradigm for data delivery in networks. When deployed in a multi-rate wireless network, network coding has to interact with rate adaptation. When multicasting packets (a requirement of network coding) in a multi-rate IEEE 802.11 wireless network, one must use care when selecting the transmission rate to...
It is a challenge that network coding achieve wide use in wireless mesh networks. Network coding must be compatible or friendly with TCP in practice. We propose a mechanism that naturally add network coding to current network systems. In our scheme, the destination feedback the degree of freedom of encoding block, and delays of packet delivery minimize reordering and timeouts. Using multipath routing,...
It is a challenge that using multipath transmit packets based on network coding in wireless mesh networks (WMNs). This paper proposes a mechanism that naturally adds network coding to multipath routing network systems. In the mechanism, network coding is compatible with improved multipath TCP (MPTCP). The destination feedback the degree of freedom of encoding block, and delays of packet delivery minimize...
The effects of adaptive-rate transmissions and routing on the total throughput of a slow-frequency-hop packet-radio network are considered. Adaptive rates are achieved through the use of error-control coding with perfect side information. Both fixed-length codes and variable-length codes are considered. Performance results are obtained for direct transmission (i.e., no routing), two-hop limited routing,...
A common assumption in the network coding literature is that the users are cooperative and will not pursue their own interests. However, this assumption can be violated in practice. In this paper, we analyze inter-session network coding in a wired network, assuming that the users are selfish and act as strategic players to maximize their own utility. We prove the existence of Nash equilibria for a...
In wireless mesh networks (WMNs), to provide Internet connection, packets originating from mesh clients are relayed through multihops by the mesh routers (MRs) towards the Internet gateway (IGW). As MRs may belong to different entities, in the aim to provide sufficient Internet throughput to its clients or avoid traffic congestion, a selfish MR fully or partially drops the relay packets oriented towards...
To overcome the inherent lossy property of wireless links and increase network throughput, many multi-path routing protocols have been proposed to improve the reliability and latency of packet delivery in wireless networks. Multi-path routing protocols, however, do not take advantage of existing coding opportunities to maximize network throughput. In this paper, we propose a novel coding-aware multi-path...
Network coding has been considered as an effective strategy for improving the performance of wireless mesh networks (WMNs) by encoding multiple packets into a single transmission. Existing work shows that integration of network coding and routing at the network layer can achieve good performance in terms of network throughput and packet delay. In this paper, we propose a rate-adaptive coding-aware...
In this paper, joint routing scheme is proposed and studied in network coding aware circumstances. The idea of joint routing is enlightened by observation that mutual influence exists between flows. The defining aspect of joint routing is to treat all flows in the network as a whole and to make use of interactions between flows to optimize system performance. Formal description of joint routing problem...
This paper studies the lossy, wireless packet network of [1], in the case of a multicast requirement and the availability of feedback. In the unicast case, feedback is sufficient to allow a strategy which achieves the throughput-optimal cut-set capacity without requiring network coding [3]. We provide a counter-example to show that source coding and feedback, without network coding, is insufficient...
Network coding is known to improve throughput by mixing information from different flows and conveying more information in each transmission. Recently some proposals have demonstrated the benefits of applying network coding to wireless networks with broadcast transmissions. It is expected that the opportunities for coding and the corresponding gains depend on the bit-rate chosen for determining routes...
Wireless network coding has been shown to reduce the number of transmissions by exploiting the broadcast nature of the wireless medium. Multiple packets may be encoded into a single packet when their respective next hops have enough information to decode them. Previous research has shown that packets belonging to different flows may be encoded (interflow coding) when they are passing through a common...
Network coding is increasingly being investigated as an alternative to routing to increase throughput in packet networks. Like most data transfer schemes, the effectiveness of network coding may be limited by extreme congestion. When using network coding, these congested conditions are mitigated somewhat, but may still occur. We propose a selective channelization scheme in which links that experience...
This paper explores the attributes, layering models and objective functions in cross layer designs for mobile ad hoc wireless networks by taking all the statistical characteristics and constraints from the physical (PHY) layer, media access control (MAC) layer and network (NET) layer into consideration. This paper reviews the entire network optimization across all the PHY/MAC/NET layers. At the PHY...
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