Achieving Low Latency of Multimedia Content Browsing in UPnP AV Architectures

UPnP AV solutions have suffered from latency performance problems in user interfaces to browse multimedia contents in remote hosts. This study shows how to improve the round-trip latency by way of caching and aggressive link-based prefetching of the response of the browse request. Caching reduces the latency dramatically, and aggressive link-based prefetching lead to 100% cache hit rate. Although it is commonly believed that aggressive link-based prefetching is a naive approach and causes numerous redundancies, we presented our prefetching strategy with the proper number of cache entries and proposed cache replacement algorithm is very effective and efficient. Through the evaluation of our research results, we present a dramatic performance improvement, approximately 300,000% faster than ever, without many redundancies.