S. Spero, "Session Control Protocol," http://www.w3.org/Protocols/HTTP-NG/http-ng-scp.html, 1998.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....of each connection, in accordance with the session fair algorithms, and then achieving that rate. The issue of session identification of a connection, and communication between connections in a session can be implemented explicitly by each application, or by extending the Session Control Protocol [23] or Session Initiation Protocol [24] The Integrated Congestion Management architecture [15] includes the ability to communicate information between different connections, though clearly the appropriate type and use of information must be modified to meet our needs. More work is needed to develop ....

S. Spero, "Session Control Protocol," http://www.w3.org/Protocols/HTTP-NG/http-ng-scp.html, 1998.

....several logically distinct streams onto a single transport (TCP) connection to overcome the adverse effects of independent competing TCP transfers. Examples of this include Persistent connection HTTP (P HTTP, part of HTTP 1. 1) which is application specific, and the Session Control Protocol (SCP) [22] and the MUX protocol [9] which are not tied to HTTP. There are several drawbacks with this class of solutions. Architectural problems: These solutions are application specific and attempt to avoid the poor congestion management support provided by protocol stacks today. However, congestion ....

S. Spero. Session control protocol (scp). http:// www.w3.org/ pub/ WWW/ Protocols/ HTTP-NG/ http-ng-scp.html, 1996.

....several logically distinct streams onto a single transport (TCP) connection to overcome the adverse e ects of independent competing TCP transfers. Examples of this include Persistent connection HTTP (P HTTP, part of HTTP 1. 1) which is applicationspeci c, and the Session Control Protocol (SCP) [28] and the MUX protocol [11] which are not tied to HTTP. There are several drawbacks with this class of solutions. Architectural problems: These solutions are applicationspeci c and attempt to avoid the poor congestion management support provided by protocol stacks today. However, congestion is ....

Spero, S. Session Control Protocol (SCP). http:// www.w3.org/ pub/ WWW/ Protocols/ HTTP-NG/ http-ngscp. html, 1996.

....have been proposed in the literature. Of particular importance are approaches that multiplex several logically distinct streams onto a single TCP connection at the application level, including Persistent connection HTTP (P HTTP [28] part of HTTP 1. 1 [11] the Session Control Protocol (SCP) [39], and the MUX protocol [14] Unfortunately, these solutions su er from two important drawbacks. First, because they are application speci c, they require each class of applications (Web, real time streams, le transfers, etc. to reimplement much of the same machinery. Second, they cause an ....

Spero, S. Session Control Protocol (SCP). http://www.w3.org/pub/WWW/Protocols/HTTP-NG/ http-ng-scp.html, 1996.

....But this is done with the active involvement of the client and server applications. An alternative would be to abstract out the multiplexing functionality into a separate library, such as the socket library that interfaces applications to the TCP IP protocol stack. Session Control Protocol (SCP) [100] and the Session Multiplexing Protocol (WebMUX) 36] are two examples of such an approach. These protocols support more fine grained interleaving of data belonging to different logical streams than either P HTTP or HTTP 1.1. However, they suffer from some of the same drawbacks as P HTTP and ....

S. Spero. Session control protocol (scp). http://www.w3.org/pub/WWW/Protocols/HTTPNG /http-ng-scp.html, 1996.

....exacerbate network congestion. A solution that has been proposed in the literature is to have a single, long lived TCP connection onto which several logical data streams are multiplexed by the application. Examples include persistent connection HTTP (P HTTP) 13] Session Control Protocol (SCP) [14] and persistent connections in HTTP 1.1 [7] While these schemes do help improve performance, they have drawbacks. They are specifically tied to a single application and or application level protocol (HTTP) Also, by multiplexing data streams onto a single TCP connection, they introduce ....

....a single TCP connection. Since TCP only provides a single, seamless byte stream abstraction, these application level solutions include framing schemes for demarcating the individual data streams. Examples of these include Persistent connection HTTP (P HTTP) 13] Session Control Protocol (SCP) [14] and the MUX protocol [8] Significant reduction in the latency of Web accesses using P HTTP are reported in [13] Despite the performance benefits, application level solutions have drawbacks: 1. They require existing applications to be rewritten or at least relinked. Moreover, this is necessary ....

S. Spero. Session control protocol (scp). http:// www.w3.org/pub/WWW/Protocols/HTTP-NG/http-ngscp. html, 1996.

....HTTP WITH ATM 27 HTTP problems The described use of HTTP over ATM still has the problem of requiring a new connection for each request. This can t be fixed without modifying HTTP. One possibility is Spero s Next Generation HTTP (HTTP NG, Spea, Spe95] It uses a special purpose session layer ( Speb] to reuse HTTP connections. Another solution with less overhead is suggested by Padmananbhan and Mogul ( PM94] modify the client and server to cache connections as long as possible, but don t change the protocol. There are still problems in the latency involved in connection setup. However, ....

Simon Spero. Session Control Protocol (SCP). World Wide Web Document. !URL: http://www.w3.org /hypertext/WWW/Protocols/HTTP-NG/http-ng-scp.html ?.

....performance to degrade and is detrimental to the performance seen by other hosts. 2 The majority of solutions that have been proposed to address these problems involve the use of persistent connections. Examples include persistent connection HTTP (P HTTP) 15] Session Control Protocol (SCP) [16] and persistent connections in HTTP 1.1 [6] The main idea in these is to multiplex several logical connections onto a single, persistent TCP connection between a server and a client. While persistent connections certainly help, they have the drawback that they are specifically tied to HTTP. This ....

....solutions fall into two categories: those implemented as part of applications and those that are application independent. An example of the former in the context of Web applications is Persistent connection HTTP (P HTTP) 15] Examples of the latter include the Session Control Protocol (SCP) [16] and the MUX protocol [7] In P HTTP, each of the Web client and the server open a single TCP connection between them and multiplex several transfers one after another onto it. Separate transfers are demarcated using content length prefixes. The TCP connection between the server and the client is ....

S. Spero. Session control protocol (scp). http://www.w3.org/pub/WWW/Protocols/HTTP-NG/http-ngscp. html, 1996.

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