Transmitting apparatus and transmission rate control method

Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network

Reexamination Certificate

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C370S230100

Reexamination Certificate

active

08009564

ABSTRACT:
In a communication of explicit multicast system used in SICC, the frequency of variation of the transmission rate is reduced to achieve a multimedia data transmission exhibiting a high quality. An available bandwidth estimating part (102) of a transmitting apparatus (100) uses feedback information, which is received by a receiving part (101) from a receiving apparatus (200), to estimate a bandwidth available to the receiving apparatus. A bandwidth correcting part (103) corrects, based on a difference in header size between a current class and an upper-order class, the estimated available bandwidth. A class deciding part (104) uses the corrected bandwidth to change the class to which the receiving apparatus belongs.

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International Search Report dated Nov. 7, 2006.
E. Muramoto, et al., “Proposal for Congestion Control Method on Sender Initiated Muticast,” Matsushita Electric Industrial Co., Ltd., Oct. 2003, pp. 1-8. p. 7, Line 12.
R. Boivie, et al., “Explicit Multicast (Xcast) Basic Specification,” Jul. 2005, pp. 1-33.
J. Sato, et al., “IPv6 Network Camera eno XCAST6/SICC no Tekiyo,” Oct. 2005, pp. 1-3.
Y. Imai, et al., “XCAST6: Xplicit Multicast on IPv6,” IEEE/IPSJ SAINT2003, Workshop 4, Jan. 2003, pp. 1-6, p. 7, Line 6.
M. Handley, et al., “TCP Friendly Rate Control (TFRC): Protocol Specification,” RFC 3448, Jan. 2003, pp. 1-24, p. 7, Line 9.

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