A half-duplex communication network comprises a plurality of communication links, each link being configured a priori to communicate in one direction; and a plurality of nodes, each node coupled to a first and second direct neighbor nodes and a first and second skip neighbor nodes via the plurality of...http://www.google.com.tw/patents/US7889683?utm_source=gb-gplus-share專利 US7889683 - Non-destructive media access resolution for asynchronous traffic in a half-duplex braided-ring
