menu "DCCP CCIDs Configuration (EXPERIMENTAL)" depends on IP_DCCP && EXPERIMENTAL config IP_DCCP_CCID2 tristate "CCID2 (TCP) (EXPERIMENTAL)" depends on IP_DCCP select IP_DCCP_ACKVEC ---help--- CCID 2, TCP-like Congestion Control, denotes Additive Increase, Multiplicative Decrease (AIMD) congestion control with behavior modelled directly on TCP, including congestion window, slow start, timeouts, and so forth [RFC 2581]. CCID 2 achieves maximum bandwidth over the long term, consistent with the use of end-to-end congestion control, but halves its congestion window in response to each congestion event. This leads to the abrupt rate changes typical of TCP. Applications should use CCID 2 if they prefer maximum bandwidth utilization to steadiness of rate. This is often the case for applications that are not playing their data directly to the user. For example, a hypothetical application that transferred files over DCCP, using application-level retransmissions for lost packets, would prefer CCID 2 to CCID 3. On-line games may also prefer CCID 2. CCID 2 is further described in: http://www.icir.org/kohler/dccp/draft-ietf-dccp-ccid2-10.txt This text was extracted from: http://www.icir.org/kohler/dccp/draft-ietf-dccp-spec-13.txt If in doubt, say M. config IP_DCCP_CCID3 tristate "CCID3 (TFRC) (EXPERIMENTAL)" depends on IP_DCCP ---help--- CCID 3 denotes TCP-Friendly Rate Control (TFRC), an equation-based rate-controlled congestion control mechanism. TFRC is designed to be reasonably fair when competing for bandwidth with TCP-like flows, where a flow is "reasonably fair" if its sending rate is generally within a factor of two of the sending rate of a TCP flow under the same conditions. However, TFRC has a much lower variation of throughput over time compared with TCP, which makes CCID 3 more suitable than CCID 2 for applications such streaming media where a relatively smooth sending rate is of importance. CCID 3 is further described in: http://www.icir.org/kohler/dccp/draft-ietf-dccp-ccid3-11.txt. The TFRC congestion control algorithms were initially described in RFC 3448. This text was extracted from: http://www.icir.org/kohler/dccp/draft-ietf-dccp-spec-13.txt If in doubt, say M. config IP_DCCP_TFRC_LIB depends on IP_DCCP_CCID3 def_tristate IP_DCCP_CCID3 endmenu