| US 7,535,834 B2 | ||
| Node device configuring ring network and data frame control method | ||
| Hiroyuki Honma, Kawasaki (Japan); Satoru Saitoh, Kawasaki (Japan); and Kazuto Nishimura, Kawasaki (Japan) | ||
| Assigned to Fujitsu Limited, Kawasaki (Japan) | ||
| Filed on Oct. 14, 2005, as Appl. No. 11/249,471. | ||
| Claims priority of application No. 2005-170504 (JP), filed on Jun. 10, 2005. | ||
| Prior Publication US 2006/0280122 A1, Dec. 14, 2006 | ||
| Int. Cl. G01R 31/08 (2006.01) | ||
| U.S. Cl. 370—229 [370/404] | 9 Claims |
| 1. A node device which adds a frame external to a ring-shaped packet communication network formed by a plurality of stations
which transfer a data frame, to the communication network at a station in the communication network, comprising:
a reception device for receiving an external frame;
a storage device for storing a received frame;
a control device for reading from the storage device at a first transfer rate a frame addressed to a station located before
a boundary point which is a congestion point on the communication network, and reading a frame addressed to a station located
after the boundary point from the storage device at a second transfer rate lower than the first transfer rate; and
a transmission device for transmitting a read frame to the communication network.
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