Two intrinsic features of Named Data Networking(NDN), in-network caching and multipath communication, offer the potential for fast and reliable big data transmissions via multisource content delivery. Network coding has recently been utilized to achieve efficient multisource content delivery in NDN. On the other hand, request pipelining is essential for efficient multisource content delivery in network coding enabled NDN. However, it is a challenge to simultaneously support network coding and request pipelining in NDN in a cost-effective way. To address this problem, we propose NCP-NDN, a network coding and request pipelining enabled named data networking architecture. NCP-NDN supports reasonably efficient Interest aggregation when enabling request pipelining without undermining the privacy of content retrieval by extending each Interest with a session and generation oriented requester identifier. Besides, NCP-NDN provides consumers with linearly independent blocks while request pipelining is enabled by combining rank-based matching, one forwarding of each block for per requester and face, and recoding the matching cached blocks before replying an Interest. Our experimental studies illustrate that NCP-NDN improves the performance of content delivery and reduces the overhead of big data transmissions as compared to the existing schemes.

In-network caching and multipath forwarding are prominent features of Named Data Networking (NDN). Network coding enabled NDN (NC-NDN) coordinates the in-network caching and multipath forwarding to improve content delivery performance. However, the existing NC-NDN lacks the considerations on the incorporation with caching schemes. It basically adopts the caching scheme of Caching Everything Everywhere (CEE) leading to cache redundancy and unnecessary and frequent cache replacement. On the other hand, the existing caching schemes for native NDN do not make use of the characteristic of network coded Data packets. To address these problems, this paper proposes a demand and responsiveness-based caching strategy specific to NC-NDN to enable cost-effective caching for network coded Data packets. In our proposed caching strategy, the caching decision at a caching node takes into account three factors, its present demand on the network coded Data packets of the requested generation of content, its distance to the original content provider, and its potential responsiveness to the future requests for the same generation based on the number of network coded Data packets locally cached and that would return for the requested generation. It commits to cache network coded Data packets of a generation of content at more valuable nodes along the transmission path. Our experimental studies show that the proposed caching strategy offers high-performance content delivery and reduces the caching overhead as compared to the existing strategies.

Named Data Networking (NDN) intrinsically supports in-network caching and multipath forwarding. The two salient features offer the potential to simultaneously transmit content segments that comprise the requested content from original content publishers and in-network caches. However, due to the complexity of maintaining the reachability information of off-path cached content at the fine-grained packet level of granularity, the multipath forwarding and off-path cached copies are significantly underutilized in NDN so far. Network coding enabled NDN, referred to as NC-NDN, was proposed to effectively utilize multiple on-path routes to transmit content, but off-path cached copies are still unexploited. This work enhances NC-NDN with an On-demand Off-path Cache Exploration based Multipath Forwarding strategy, dubbed as O2CEMF, to take full advantage of the multipath forwarding to efficiently utilize off-path cached content. In O2CEMF, each network node reactively explores the reachability information of nearby off-path cached content when consumers begin to request a generation of content, and maintains the reachability at the coarse-grained generation level of granularity instead. Then the consumers simultaneously retrieve content from the original content publisher(s) and the explored capable off-path caches. Our experimental studies validate that this strategy improves the content delivery performance efficiently as compared to that in the present NC-NDN.