Balakrishnan, H., Seshan, S., and Katz, R. Improving reliable transport and hando# performance in cellular wireless networks. Wireless Networks 1, 4 (1995).  Home/Search   Document Not in Database   Summary   Related Articles   Check

....extends over wireless links, packet losses over such links occur primarily due to channel errors or during hando #. By attributing a packet loss to wireless transmission errors, the TCP source can refrain from taking unnecessary congestion control measures. One set of solutions (e.g. Snoop [1], WTCP [16] require support from the base station located at the interface between the wired infrastructure and the wireless access infrastructure. These solutions incur the cost of implementation at the base station and some violate the end to end semantics of TCP. In this paper, we are ....

H. Balakrishnan, S. Seshan, and R. Katz. "Improving Reliable Transport and Hando# Performance in Cellular Wireless Networks". IEEE/ACM Wireless Networks, 1(4), December 1995.

....While the research community is unsure about how TCP should modify its error control to react to packet loss of di#erent types, many proposals suggest that TCP should refrain from congestion control actions in response to wireless losses. Other proposals suggest corrective measures at lower layers [6], but such measures need infrastructure support and may not be e#ective, for example with IPsec [17] In this paper, we are primarily interested in evaluating the performance of end to end solutions under a given model through Maximum Likelihood Ratio estimation techniques. End to end estimation ....

Hari Balakrishnan, S. Seshan, and R. Kartz. Improving Reliable Transport and Hando# Performance in Cellular Wireless Networks. In ACM Wireless Networks, 1(4), Dec 1995.

....the output (measured) statistics under different type of losses, and exploit those using signal estimation techniques. It is to be disclaimed that we are not overlooking the better performance that may result from infrastructure support other than pure end to end solutions, e.g. XCP [14] and Snoop [3]. Such infrastructures have their own cost of deployment and may not be e#ective, for example with IPsec [17] In distinguishing network state or the cause of packet loss, we exploit the temporal correlation between losses and the measured end to end metrics. Congestion induced losses are ....

H. Balakrishnan, S. Seshan, and R. Katz. Improving Reliable Transport and Hando# Performance in Cellular Wireless Networks. In IEEE/ACM Wireless Networks, Vol 1. No. 4, pages 10--25, December 1995.

....use the same protocol across the connection but maintain a cache of the outstanding packets at PEP. These solutions use the cache to retransmit lost packets in that part of the connection beyond PEP, which is usually more vulnerable to link errors. The Snoop proposal, suggested by Katz et al. BSK95] is one implementation of these soft state 33 proxy solutions. This implementation recovers link errors locally by retransmitting lost packets from the cache maintained at PEP. This category of solutions has the advantage of preserving the end to end semantics of its transport protocols. A ....

H. Balakrishnan, S. Seshan, and R. Katz. Improving reliable transport and hando# performance in cellular wireless networks. ACM Wireless Networks, 1(4), 1995.

....of proposed solutions for improving TCP performance for cellular networks. Section 3 presents our protocol design in detail and section 4 discusses some implementation issues. We study its performance in section 5 and summarize our work in section 6. 2 Literature Review Many papers (see [1, 2, 3, 13]) have been written proposing methods for improving TCP performance in cellular networks where the last link is the only wireless link in the system. The typical solution As of this writing, ECN was actively debated on mailing lists, see: http: www nrg.ee.lbl.gov ecn arch Our decision to ....

H. Balakrishnan, S. Seshan, and Randy Katz, \Improving Reliable Transport and Hando Performance in Cellular Wireless Networks", Wireless Networks, Vol. 1, No. 4, December (1995).

....Explicit schemes are those that make use of agents deployed on intermediate network nodes. End to end schemes try to di erentiate losses at the receiver without making use of any intermediate nodes. Explicit Loss Di erentiation was made use of in the context of TCP ows by the use of Snoop Agents [2]. Snoop agents are suited for rst hop last hop wireless topology encountered in mobile networks. Consider a TCP ow originating from a Fixed Host (FH) and terminating at a Mobile Host (MH) The snoop agent at the base station, by monitoring the TCP packets forwarded to MH and acknowledgments ....

Hari Balakrishnan, Srinivasan Seshan, and Randy H. Katz. Improving reliable transport and hando performance in cellular wireless networks. ACM Wireless Networks, December 1995.

....from a di#erent location (including a di#erent ISP) This means the TCP connection between server and mobile host can be retained even when the mobile 5 I TCP, Mob.IP Mob.IP Satel. Split M TCP in IPv4 in IPv6 VIP 1 VIP 2 PEP Mowgli Snoop stack [2] 6] 17, 16] 18, 11] 25] 27] 10, 9] 12] [3] Connection management and dynamic addresses Retains TCP conns. yes yes yes yes yes yes no yes yes Handles new IP add. yes no yes yes yes yes no yes no Allows IP add. reuse yes N A no no yes yes N A no N A Forwards non TCP yes no yes yes yes yes yes yes no Network performance Routing ....

....support for shorter routing for mobile hosts. Almost all approaches require support in both clients and some infrastructure, except for Satellite PEPs using TCP modifications they only need to modify routers or proxies on either side of the satellite connection. The Berkeley Snoop protocol [3] is a TCP link aware protocol aimed at improving the TCP performance of mobile computers. Snoop modifies the network layer at the base station to cache TCP packets from the foreign host to the local host. If a packet is lost between the client and the base station, the base will know this by ....

H. Balakrishnan, S. Seshan, and R. H. Katz. Improving reliable transport and hando# performance in cellular wireless networks. ACM Wireless Networks, 1(4), Dec. 1995.

....a reality [34] 35] To make this happen, we are faced with challenges at all levels of computation. As e orts are being made to standardize wireless LAN technologies [13] lots of work is being done and needs to be done in ad hoc wireless routing [29] 22] Mobile IP[24] and transport layer issues [15]. There is also a need to build a software middleware infrastructure which could make intelligent use of the current technology advancements to provide the end user with a new experience of pervasive computing. The challenge is to build creative software middleware solutions which are ecient, ....

H. Balakrishnan, S.Seshan, and R.Katz. Improving Reliable Transport and Hando Performance over Wireless Networks. In ACM Wireless Networks, December 1995.

....designed to improve various aspects of TCP. The Internet draft on Performance Enhancing Proxies [6] describes several such proxies, including relatively simple functions like TCP ACK Spacing [3] 23] this proxy eliminates bursts of TCP data by smoothing out the flow of TCP ACKs) and TCP Snoop [4] (this proxy hides packet drops on lossy links from the TCP sender to avoid wrongly triggering TCP congestion control) C. Benefits of Signalling We believe that most proxies, including both stand alone and distributed, benefit from being able to communicate with other proxies along the flow, ....

H. Balakrishnan, S. S. Seshan, and R. H. Katz. Improving reliable transport and hando# performance in cellular wireless networks. In Wireless Networks 1, pages 469--481, 1995.

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Balakrishnan, H., Seshan, S., and Katz, R. Improving reliable transport and hando# performance in cellular wireless networks. Wireless Networks 1, 4 (1995).

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Balakrishnan, H., Seshan, S., and Katz, R. H. Improving reliable transport and hando performance in cellular wireless networks. ACM Wireless Networks 1, 4 (1995).

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H. Balakrishnan, S. Seshan, and R. Katz, Improving reliable transport and hando performance in cellular wireless networks, ACM Wireless Networks, vol. 1, no. 4, pp. 469481, Dec. 1995.

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H. Balakrishnan, S. Seshan, and R. Katz, Improving reliable transport and hando performance in cellular wireless networks, ACM Wireless Networks, vol. 1, no. 4, pp. 469481, Dec. 1995.

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H. Balakrishnan, S. Seshan, and R. Kartz. Improving Reliable Transport and Hando# Performance in Cellular Wireless Networks. In ACM Wireless Networks, 1(4), Dec 1995.

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Balakrishnan, H., Seshan, S., and Katz, R. H. Improving reliable transport and hando# performance in cellular wireless networks. ACM Wireless Networks 1, 4 (Dec 1995).

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Balakrishnan, H., Seshan, S., and Katz, R. H. Improving reliable transport and hando# performance in cellular wireless networks. ACM Wireless Networks 1, 4 (Dec 1995).

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H. Balakrishnan, S. Seshan, and R. H. Katz. Improving Reliable Transport and Hando# Performance in Cellular Wireless Networks. ACM Wireless Networks, 1(4), December 1995.

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H. Balakrishnan, S. Seshan, and R. H. Katz. Improving reliable transport and hando performance in cellular wireless networks. ACM Wireless Networks, 1(4), December 1995.

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H. Balakrishnan, S. Seshan, and R. Kartz. Improving Reliable Transport and Hando# Performance in Cellular Wireless Networks. In ACM Wireless Networks, 1(4), Dec 1995.

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H. Balakrishnan, S. Seshan, and R. Katz. Improving Reliable Transport and Hando# Performance in Cellular Wireless Networks. In IEEE/ACM Wireless Networks, Vol 1. No. 4, pages 10--25, December 1995.

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Hari Balakrishnan, Srinivasan Seshan, and Randy H. Katz. Improving reliable transport and hando# performance in cellular wireless networks. ACM Wireless Networks, 1(4):469--481, 1995.

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H. Balakrishnan, S. Seshan, and R. H. Katz, "Improving reliable transport and hando# performance in cellular wireless networks," ACM Wireless Networks, vol. 1, no. 4, 1995.

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H. Balakrishnan, S. Seshan, and R. Katz. Improving reliable transport and hando performance in cellular wireless networks. Wireless Networks, 1(4):471481, 1995.

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H. balakrishnan, S. Seshan, and R. Katz,\Improving Reliable Transport and Hando Performance in Cellular wireless Networks," ACM Wireless Networks, 1995.

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H. Balakrishnan, S. Seshan, and R. H. Katz, "Improving Reliable Transport and Hando# Performance in Cellular Wireless Networks," ACM Wireless Networks Journal, vol. 1, December 1995.

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