P. Manzoni, D. Ghosal, and G. Serazzi. Impact of mobility on TCP/IP: An integrated performance study. IEEE Journal on Selected Areas in Communications, 13(5):858--867, June 1995.  Home/Search   Document Not in Database   Summary   Related Articles   Check

.... signaling to notify the transport layer about handoff completion [17] Invoking full congestion recovery procedures after every handoff still reduces throughput, so an alternative is to attempt to detect whether loss is due to mobility or congestion by exploiting mobility hints from lower layers [18]. If the loss is due to congestion, both slow start and congestion avoidance are used. If the loss is due to mobility, only slow start is used for faster recovery. Unlike handoffs where congestion avoidance is needed to probe the state of the new link, with losses due to errors we should skip ....

P. Manzoni, D. Ghosal, and G. Serazzi. Impact of mobility on TCP/IP: An integrated performance study. IEEE Journal on Selected Areas in Communications, 13(5):858--867, June 1995.

....will be discarded as duplicates after transmission across the wireless link, thus reducing throughput. The CDMA circuit data protocol hints at some of this complexity by limiting the level of retransmission in the RLP [17] 11 TCPperformance over wireless links is currently of great interest [5,20,2]. 4. Mobility management Mobility management for wireless networks is a topic of much interest. Several papers reporting on research into database and resource management for mobility are available in the literature for example [22] The cellular approach applicable to voice calls and ....

P. Manzoni, D. Ghosal and G. Serazzi, Impact of mobility on TCP/IP: An integrated performance study, IEEE J. Select. Areas Commun. (1995), Special Issue on Mobile Computing Networks.

....links are presented. TCP is covered in this chapter because TCP is used to show the bene ts of the active delivery scheme in Chapter 4. 2.3. 1 TCP over Wireless Link In the wireless environment, packet loss is usually caused by high error rates at the wireless link or errors during hando [85, 27, 86, 87]. TCP s response to packet loss is to decrease the congestion window and retransmit lost packets [88] The congestion window is then increased using a congestion avoidance scheme such as slow start [89] The high error rates of a wireless link during hando combined with the slow start scheme ....

....after hando . After a MH migrates it sends three duplicate acknowledgements to the CH. As a result, fast retransmission is invoked and TCP recovers faster. However, the authors only address hando latency rather than wireless loss. Caceres et al. s work was later extended by Manzoni et al. [85] where TCP is modi ed to perform slow start only when communicating with a MH. A feedback mechanism is used to inform the CH that the communication involves a MH. A feedback approach was also proposed by Bakshi et al. 91] In [91] the source is noti ed to re adjust its timeout value whenever the ....

[Article contains additional citation context not shown here]

P. Manzoni and D. Ghosal, \Impact of mobility on TCP/IP: An integrated performance study," IEEE Journal on Selected Areas in Communications, vol. 13, pp. 858-867, June 1995. BIBLIOGRAPHY 211

....procedures over the network. One example of such a signaling function is incorporated in the recently proposed indirect transport layer protocol (I TCP) 24] intended to overcome the adverse effects of transmission errors and handoffs in a wireless network to transport protocol performance [25], 26] With I TCP, the TCP connection between an MT and a fixed host is broken up at the edge of the fixed and wireless network, and a special network entity is assigned to coordinate between the two connections. In the UPC system, the user s PA can perform the function of this coordinating ....

P. Manzoni, D. Ghosal, and G. Serazzi, "Impact of mobility on TCP/IP: An integrated performance study," IEEE J. Select. Areas Commun., vol. 13, pp. 858--867, June 1995.

....hand, when a connection extends over wireless links, packet losses due to channel errors or to non seamless handoffs on the radio channel are by far more likely to occur than congestion in the wired portion of the connection. Recently, some papers on the effect of handoff on the TCP performance [1, 2, 3, 4, 5] have appeared. The analytical study of TCP over wireless links has started to receive attention as well. In their pioneering paper, Lakshman and Madhow [6] studied the effect of random packet losses on the performance of TCP, assuming independent channel errors. Since packet losses over fading ....

P. Manzoni et al., "Impact of mobility on TCP/IP: an integrated performance study", IEEE J. Selected Areas Comm., vol. SAC-13, pp. 85867, Jun. 1995.

.... and the Redirector are implemented according to [2, 3] Related Work In general, issues of mobility has been quite extensively addressed on the IP layer (for example, 5, 6, 7, 8, 9, 10] Also, there has been studies indicating problems with simple porting of TCP onto mobile machines (e.g. [11, 12]) A number of approaches have been proposed to cure this ill effect of mobility on TCP performance (e.g. 2, 13] Finally, there have been some studies indicating that mobility needs to be addressed on layers above the transport layer as well (e.g. 14, 1, 15, 16] This is, however, currently ....

P. Manzoni, D. Ghosal, and G. Serazzi, "Impact of Mobility on TCP/IP: An Integrated Performance Study," IEEE Journal on Selected Areas in Communications, issue on Mobile Computing Networks, 1995.

....a mobile node at the home agent changes whenever it moves from one IP subnet to another. This could lead to frequent registrations with the home agent, which can incur a long handoff delay when the mobile node is far away from home. This can cause significant packet drop and throughput reduction [5]. In [3] Mobile IP is extended with a dynamic routing agent between the home agent and the foreign agent of a mobile node. The routing agent serves as the current Supported in part by the National Science Foundation Grant NCR 9628126 and by the Texas Higher Education Coordinating Board, ....

P. Manzoni, D. Ghosal, and G. Serazzi. Impact of mobility on TCP/IP: An integrated performance study. IEEE Journal on Selected Areas in Communications, 13(5):858--867, June 1995.

....rates within a few Mbps at a typical range of 50 100 meters. Under these conditions, the performance of transport protocols such as the Transmission Control Protocol (TCP) degrades significantly. The performance problems of TCP over wireless channels have been well documented in the literature [1, 2, 3, 4] and a number of solutions have been proposed. Most of these solutions operate at the transport layer. Cacares et. al [2] proposed a method for fast recovery from losses during handoff. Their solution exploits TCP s fast retransmit option to reduce TCP s packet loss detection latency. In [1] a ....

P. Manzoni, D. Ghoshal, and G. Serazzi, "Impact of mobility on TCP/IP: an integrated performance study," IEEE Journal on Selected Areas in Communications, 13(5)(1995), 858--867.

....changes whenever it moves from one IP subnet to another. This could lead to frequent registrations with the home agent. Third, registrations with the home agent may incur a long handoff delay when a mobile node is far away from home. This can cause significant packet drop and throughput reduction [9]. To avoid triangular routing, location caches are used at routers [15] or at correspondent hosts [8, 10] to maintain the mobility binding between the home address and the care of address of a mobile node. When a mobile node moves, its mobility binding is propagated to correspondent hosts. An ....

....cost and handoff delay with a slight increase in packet tunneling. Compared with the related work, the extension of Mobile IP with routing agents is orthogonal to techniques for route optimization [8, 10, 13, 15] fast intra subnet handoff [5] and improving TCP performance in wireless networks [3, 4, 9]. In fact it can be combined with these techniques for a better overall support for mobility. Although the extension of Mobile IP with routing agents can be viewed as a dynamic two level hierarchical architecture, it is different from other hierarchical schemes such as [7, 12] Unlike redirection ....

P. Manzoni, D. Ghosal, and G. Serazzi. Impact of mobility on TCP/IP: An integrated performance study. IEEE Journal on Selected Areas in Communications, 13(5):858--867, June 1995.

....housed in a few buildings located close to each other. There are two main concerns. First, the registration delay contributes to the handoff delay. The delay is significant when a mobile node is far away from home and causes significant packet drop and drastic reduction in communication throughput [9]. Second, frequent location updates incur extensive overhead for location cache management in route optimization [6, 7, 10, 14] that requires accurate location information in order to tunnel IP datagrams correctly. At the transport level, variations of TCP have been designed to cope with packet ....

....updates incur extensive overhead for location cache management in route optimization [6, 7, 10, 14] that requires accurate location information in order to tunnel IP datagrams correctly. At the transport level, variations of TCP have been designed to cope with packet drop caused by handoff [9] and by high bit error rate on the wireless link [2, 3] At the network level, two approaches have been proposed to reduce the handoff delay by localizing the effect of mobile registrations and shielding the home agent from frequent local movements of a mobile node. In [12] foreign agents are ....

P. Manzoni, D. Ghosal, and G. Serazzi. Impact of mobility on TCP/IP: An integrated performance study. IEEE Journal on Selected Areas in Communications, 13(5):858--867, June 1995.

....for RPC based applications is rather difficult. UDP is clearly inadequate for error prone wireless links. TCP, although it provides reliable delivery, suffers from the problems mentioned earlier. In addition, in a mobile environment TCP performance degrades because of wireless errors and moves [11, 16, 24]. For RPC based applications in mobile environment, we therefore need a transport protocol that provides reliability on the wireless link, but at the same time has the simplicity of UDP for the relatively error free wired links. 2.2 Dynamic binding and subject based naming Dynamic server binding ....

P. Manzoni, D. Ghosal and G. Serazzi, "Impact of mobility on TCP/IP: an integrated performance study", To appear in the IEEE Journal on Selected Areas in Communications, 1995.

No context found.

P. Manzoni, D. Ghosal, and G. Serazzi. Impact of mobility on TCP/IP: an integrated performance study. To appear in the IEEE Journal on Selected Areas in Communications, 1995.

Online articles have much greater impact   More about CiteSeer.IST   Add search form to your site   Submit documents   Feedback  

CiteSeer.IST - Copyright Penn State and NEC