A cluster-based active router architecture

A cluster-based active router architecture supporting video/audio stream transcoding service

“…The MeGa project [2] of the University of California, Berkeley, and the Journey network model [14] at the NEC-USA, fall into the second category, where routers provide customizable services according to packet requests. Ralph Keller et al proposed an active router architecture [5], where video scaling algorithms are deployed to improve video performance.…”

“…Broadly, there are two approaches to active networking [14]. One is that the network nodes are fully programmable and active packets carry all of the code that should be executed on them.…”

“…In the Journey network model [14], a cluster-based active router architecture, called Clara, is adopted to collocate routing and computational functionality. This model supports scalability by distributing computation among a sequence of active routers, but does not guarantee that the processing will be accomplished before the packet reaches the destination, which may introduce such problems as high packet out-of-order rate and high unprocessed packet rate.…”

Scheduling real-time multimedia tasks in network processors

“…Although a plethora of scheduling schemes have been proposed for multiprocessors, simple static policies, such as round robin or random distribution policy [1], [5], [6] are adopted in practice. However, these schemes do not consider the processing order or jitter problem.…”

“…The multimedia streams can be transcoded to the appropriate format by active routers in the network before they reach the destination, as shown in Figure 1. Such a scheme was originally proposed in [1] with a clusterbased active router to accomplish this task.…”