Upper and lower relays and network system
AssigneeFujitsu Limited
InventorNaofumi Kobayashi
Life of this patent
Estimating the term…
Abstract
In a network system comprising an upper relay and a plurality of lower relays connected to the upper relay with working links, the lower relays are connected with redundant links, and communication is performed through the redundant links when the working links are unavailable. Also, frames passing through a same lower relay are distributed and transmitted to the working link and the detour path (working link—lower relay—redundant link).
Claims44
A network system comprising:
- an upper relay;
- a plurality of lower relays connected to the upper relay with working links;
- and
- one or more redundant links for mutually connecting the lower relays;
- the upper relay determining a detour path, for the working link, composed of the other working links and the redundant links.
An upper relay for determining a detour path, of a single arbitrary working link within working links respectively connecting its own relay and a plurality of lower relays, composed of other working links and one or more redundant links mutually connecting the lower relays.
A lower relay for determining a detour path, of a working link connecting its own relay and an upper relay, including other working links connecting the upper relay and other lower relays, and redundant links connecting its own relay and the other lower relays.
Dependencies are inferred from the claim text.