Jacobson, V., "4BSD Header Prediction", Comp Comm Review, v. 20, no. 2, April 1990.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....pp. 236 239] If the incoming segment fails any of these conditions, protocol processing falls back to the full protocol processing procedure presented in RFC 793 [11] which is designed to handle all possible situations, such as connection establishment or starting the TCP error recovery process [25]. A second common operation that is required by network protocols is to look up the protocol control blocks for connections. This is especially important when the number of simultaneous connections is high [23] Current implementations use data structures, such as hash tables, that have been ....

Jacobson V. (1990) 4BSD Header Prediction. ACM Computer Communication Review, vol. 20, no. 1, pp. 13-15.

.... packet header information between arrivals is redundant due to network traffic locality[2] 3] 6] Consequently, there have been several attempts to take advantage of network traffic locality to reduce processing overhead at the LAN interconnection nodes, thereby improving transfer delay[3] [4], 5] Typically, such attempts involve caching the previously processed header and predicting that the next packet will require the same processing as the previous packet. In this paper, a new scheme is proposed for header prediction based upon the interframe gap between arriving packets. This ....

....of clustering of packets from the same source station, to improve internetworking performance . While the notion of source correlation itself is not new, and several traffic measurements simulation studies have convincingly demonstrated the existence of source locality in network traffic [3] [4], 5] our study is more general in the sense that we establish a theoretical foundation for the notion of source locality which can be applied to a wide range of specific internetworking configurations. This new scheme proposes that two packet forwarding service options be provided in ....

V. Jacobson, "4bsd Header Prediction," Computer Communication Review, vol. 20, no. 2, pp. 13-15, April 1990.

....due to this complexity) of questionable value. Finally, it must be kept in mind that SACKs are only useful if the physical medium is highly error prone and there is a general tendency of getting more than a single packet error in a particular window. D. Header Prediction Header prediction [4] is a high performance transport protocol implementation technique that is most important for highspeed. This technique optimizes the code for the most common case, receiving a segment correctly and in order. Using header prediction, the receiver asks the question, Is this segment the next in ....

V. Jacobson, "4BSD Header Prediction", ACM Computer Communication Review, Vol. 20, No. 1, April 1990, pp. 13-15.

....techniques [Hehmann90] Indeed, techniques for improving protocol implementations have received significant attention in the literature. We briefly mention three frequently used approaches: header prediction, the use of header templates and caching of context information. Header prediction [VanJacobson90] Thia 92] compares the header of a received packet with a predicted header, which is calculated from the previous packet. For example the next sequence number can often be calculated from the previous sequence number and from the packet size. In case a match occurs, a dedicated processing path ....

Van Jacobson, "4BSD Header Prediction," ACM SIGCOM, Comp. Communications Review, vol. 20, no. 2, pp.13--16, Apr. 1990.

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Jacobson, V., "4BSD Header Prediction", ACM Computer Communication Review, April 1990.

....TCP may Jacobson, Braden, Borman [Page 22] RFC 1323 TCP Extensions for High Performance May 1992 update a clock or timestamp value associated with the connection whenever TS.Recent is updated, for example. The details will be implementation dependent. 4.2. 4 Header Prediction Header prediction [Jacobson90a] is a high performance transport protocol implementation technique that is most important for high speed links. This technique optimizes the code for the most common case, receiving a segment correctly and in order. Using header prediction, the receiver asks the question, Is this segment the next ....

Jacobson, V., "4BSD Header Prediction", ACM Computer Communication Review, April 1990.

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Jacobson, V., "4BSD Header Prediction", Comp Comm Review, v. 20, no. 2, April 1990.

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Van Jacobson, "4BSD Header Prediction", ACM Sigcomm Computer Communications Review, Vol. 20, No. 2, April 1990.

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