Velten, D., Hinden, R., and J. Sax, "Reliable Data Protocol", RFC 908, BBN, July 1984.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....information about exactly which segments have arrived at the receiver. SACKs allow the TCP sender to retransmit only those segments that have been dropped by the network. A SACK is defined for TCP in [MMFR96] SACKs have been proven useful in several research protocols (e.g. NETBLT [CLZ87] RDP [VHS84] VMTP [Che88] as well as TCP [AHKO97] FF96] 2.4.3 More Aggressive Slow Start Our XFTP experiments show that one of the reasons TCP was not able to fully utilize the channel bandwidth even when using an adequate window size was the slow start algorithm. This has also been shown in companion ....

D. Velten, Robert Hinden, and J. Sax. Reliable Data Protocol, July 1984. RFC 908.

....work includes new transport protocols, proposed extensions to TCP, and research on configuration frameworks for transport protocols. In the first area, a number of other transport protocols have been proposed since the introduction of TCP and UDP. Examples include the Reliable Data Protocol (RDP) [23], which provides a message based transport service with reliability and optional FIFO ordering guarantees, and the Versatile Message Transaction Protocol (VMTP) 24] which implements transactional RPC style communication. The latter has certain customizable features, including optional security ....

D. Velten, R. Hinden, and J. Sax, "Reliable data protocol," RFC 908, BBN Communications Corporation, Jul 1984.

....that incorporate intermediate data buffering and other overhead in order to provide a data stream abstraction. So, the network device mentioned above can be based on some packet oriented communication service provided by the operating system on target platforms, such as RDP protocol stack [18]. This type of service is also identical to the services provided by the shared memory low level device with static memory management strategy [14] 18 3.3.1 The Channel Device Interface The following two functions constitute the interface between low level device layer and the Device layer ....

Velten, D., Hinden, R., and Sax, J. Reliable Data Protocol. http://www.fagg.unilj. si/MIRROR/ rfc/rfc/rfc908.html, Sept. 1996 29 Footnotes

....WORK Related work includes new transport protocols, proposed extensions to TCP, and research on configuration frameworks for transport protocols. A number of other transport protocols have been proposed since the introduction of TCP and UDP. Examples include the Reliable Data Protocol (RDP) [20] that provides a message based transport service with reliability and optional FIFO ordering guarantees, and the Versatile Message Transaction Protocol (VMTP) 21] for transactional (RPC style) communication. The latter has certain customizable features, including optional security and ....

D. Velten, R. Hinden, and J. Sax, "Reliable data protocol," RFC 908, BBN Communications Corporation, Jul 1984.

....congestion. However, in the wireless medium, packet losses may also be due to corruption due to high BER, fading, and so on. Here, the right approach is to try harder, instead of backing off. Alternative transport protocols are: NETBLT [NETBLT, RFC1986, RFC1030] MNCP [MNCP] ESRO [RFC2188] RDP [RFC908, RFC1151] VMTP [VMTP] 3 TCP or not This is one of the most hotly debated issues in the wireless arena. Here are some arguments against it: It is generally recognized that TCP does not perform well in the presence of significant levels of non congestion loss. TCP detractors argue that the wireless medium ....

Velten, D., Hinden, R., Sax, J., "Reliable Data Protocol", RFC 908, July 1984.

....which segments are queued at the receiver and which have not yet arrived. Some evidence in favor of selective acknowledgments has been published [NBS85] and selective acknowledgments have been included in a number of experimental Internet protocols VMTP [Cheriton88] NETBLT [Clark87] and RDP [Velten84], and proposed for OSI TP4 [NBS85] However, in the non LFN regime, selective acknowledgments reduce the number of Jacobson, Braden, Borman [Page 3] RFC 1323 TCP Extensions for High Performance May 1992 packets retransmitted but do not otherwise improve performance, making their complexity of ....

Velten, D., Hinden, R., and J. Sax, "Reliable Data Protocol", RFC 908, BBN, July 1984.

....services. Nevertheless, such communication services 56 have less software overhead than the stream oriented ones. So, the network device mentioned above, can be based on some packet oriented communication service provided by the operating system on target platforms, such as RDP protocol stack (Velten et al..1994), for instance. This type of service is also identical with the services provided by the shared memory low level device with static memory management strategy described below. In general, shared memory allocation is a time consuming operation. The amount of time required to allocate a region of ....

....of the device, or executing the polling part of the low level device in a separate thread with lower priority. It is assumed in the design presented above that the network device is based on the TCP IP network services provided by the target platform operating system or on the RDP protocol stack (Velten et al. 1994) implemented on top of UDP. So, one can use the asynchronous select call to query the TCP IP driver about the state of the network channel. In case of the shared memory device, one can use events to notify a target process of an incoming message. As was mentioned, the locking mechanisms and ....

Velten, D., R. Hinden, and J. Sax. 1994. Reliable data protocol.

....problem under restrictions imposed by backward compatibility. There are many advantages to using transaction or message oriented protocols [3] and several well motivated proposals for their design. The Reliable Data Protocol (RDP) is a messageoriented protocol designed for bulk data transfer [57]. NETBLT is a buffer oriented protocol that uses rate based flow control and receiver controlled retransmissions [14] The Internet Reliable Transaction Protocol (IRTP) is a transaction oriented protocol offering in order delivery [40] Some protocols are designed to handle several access patterns ....

D. Velten, R. Hinden, and J. Sax. Reliable Data Protocol. RFC-908, July 1984.

.... Laboratory One Cyclotron Road, Berkeley, CA 94720 kfall ee.lbl.gov, floyd ee.lbl.gov DRAFT December 2, 1995 1 Introduction The capability to provide selective acknowledgement (SACK) of received data has been used in a number of transport protocols including NETBLT [CLZ87] XTP [SDW92] RDP [VHS84] and VMTP [Che88] Although there have been proposals for adding SACK to TCP [BJ88, BJZ90] SACK was later removed from the TCP RFCs (Request For Comments) BBJ92] pending further research. In this report, we illustrate some of the benefits of adding SACK to Reno implementations of TCP. We use ....

D. Velten, R. Hinden, and J. Sax. "Reliable Data Protocol,". (RFC 908 Network Information Center), Jul 1984.

....and the MSRs to support I TCP connections and efficient handoffs in case a mobile host communicating over an open connection switches cells. Our scheme is not tied specifically with TCP and can be easily extended to support indirection for other transport layer protocols such as UDP [20] and RDP [27]. We present performance measurements for the time needed to achieve I TCP handoffs when a mobile host moves from one wireless cell to another. We also analyze how the handoff time depends on the size of state information to be exchanged between two MSRs participating in the handoff. The rest of ....

D. Velten, R. Hinden, and J. Sax. Reliable data protocol. RFC 908, July 1984.

....Energy Research, Scientific Computing Staff, of the U.S. Department of Energy under Contract No. DE AC03 76SF00098. considerable savings can be achieved. Several transport protocols have provided for selective acknowledgment (SACK) of received data. These include NETBLT [CLZ87] XTP [SDW92] RDP [HSV84] and VMTP [Che88] The first proposals for adding SACK to TCP [BJ88, BJZ90] were later removed from the TCP RFCs (Request For Comments) BBJ92] pending further research. The current proposal for adding SACK to TCP is given in [MMFR96] We use simulations to show how the SACK option defined in ....

R. Hinden, J. Sax, and D. Velten. "Reliable Data Protocol,". Request for Comments (Experimental) RFC 908, Internet Engineering Task Force, July 1984. (Updated by RFC1151).

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Velten, D., Hinden, R., and J. Sax, "Reliable Data Protocol", RFC 908, BBN, July 1984.

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Velten, D., Hinden, R., and J. Sax, "Reliable Data Protocol", RFC 908, July 1984.

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Velten, D., Hinden, R. and J. Sax, "Reliable Data Protocol", RFC 908, July 1984.

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D. Velten, et. al., Reliable Data Protocol, RFC 908

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D. Velten, R. Hinden and J. Sax, "Reliable data protocol", Request for Comments 908, July 1984.

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