(i9) United States
(12) Patent Application Publication
(54) INFORMATION DISTRIBUTION SYSTEM, TERMINAL APPARATUS USED IN SUCH SYSTEM, RECORDING MEDIUM ON WHICH PROGRAM IS RECORDED, AND LOOP CONNECTION AVOIDANCE METHOD
(75) Inventor: Yasushi Yanagihara, Nagoya-shi
OLIFF & BERRIDGE, PLC
P.O. BOX 320850
ALEXANDRIA, VA 22320-4850 (US)
(73) Assignee: BROTHER KOGYO
(21) Appl.No.: 12/078,037
(22) Filed: Mar. 26, 2008
(30) Foreign Application Priority Data
May 1, 2007 (JP) 2007-121199
(51) Int. CI.
(52) U.S. CI 709/232
In order that a loop does not occur when switching upstream terminal apparatus, to provide an information distribution system capable of preemptively detecting a distribution route loop, and avoiding the loop, a terminal apparatus and a program used in the same system, as well as a loop connection avoidance method.
A terminal apparatus B which has received loop connection detection information from upstream determines whether or not a downstream terminal apparatus of a control path which is not a distribution route along which contents information is flowing, and a source of the loop connection detection information match and, in the event that they match, determines that a loop will occur. By this means, it is possible to determine in advance that a loop will occur, before switching an upstream connection destination. Also, substitute upstream terminal apparatus search information is transmitted in a downstream direction from terminal apparatus B0 and Bl, which are second nodes, and a terminal apparatus B which has received the substitute upstream terminal apparatus search information, but has not received the loop connection detection information, is made a substitute upstream apparatus. By switching to the substitute upstream apparatus, it is possible to avoid the loop.