We propose a simple distance-vector protocol for routing in networks having unidirectional links. The protocol can be seen as an adaptation for these networks of the strategy as used in the popular RIP protocol. The protocol comprises two main algorithms, one for collecting "from" information, and the other one for generating and propagating "to" information. Like the RIP protocol, this one can handle dynamic changes and tolerate node and link failures in the network.

Midimew networks[4] are mesh-connected networks derived from a subset of degree-4 circulant graphs. They have minimum diameter and average distance among all degree-4 circulant graphs, and are better than some of the most common topologies for parallel corr puters in terms of various cost measures. Among the many midimew networks, the rectangular ones appear to be most suitable for practical implementation. Unfortunately, with the normal way of laying out these networks on a 2D plane, long cross wires that grow with the size of the network exist. In this paper, we propose ways to lay out rectangular midimew networks in a 2D grid so that the length of the longest wire is at most a small constant. We prove that these constants are optimal under the assumption that rows and columns are moved as a whole during the layout process.

A fundamental problem that confronts structured peer-topeer system that use DHT technologies to map data onto nodes is the performance of the network under the circumstance that a large percentage of nodes join and fail frequently and simultaneously. A careful examination of some typical peer-to-peer networks will contribute a lot to choosing and using certain kind of topology in special applications. This paper analyzes the performance of Chord[7] and Koorde[2], and find out the crash point of each network through the simulation experiment.

Preparata and Vuillemin proposed the cube-connected cycles (CCC) and its compact layout in 1981[17]. We give a new layout of the CCC which uses less than half the area of the Preparata-Vuillemin layout. We also give a lower bound on the layout area of the CCC. The area of the new layout deviates from this bound by a small constant factor. If we "unfold" the cycles in the CCC, the resulting structure can be laid out in optimal area.

Preparata and Vuillemin proposed the cube-connected cycles (CCC) in 1981, and in the same paper gave an asymptotically-optimal layout scheme for the CCC. While all the known optimal layouts of the CCC, including the Preparata–Vuillemin layout, have long wires, we give a new layout scheme which has no long wires while keeping the asymptotically-optimal area. Hence, we can conclude that the CCC can be laid out optimally (within a constant factor) both in area and in wire length. We also show how large a constant-factor blow-up in area is needed in order not to produce any long wire in the layout.