S. Seshan, H. Balakrishnan, R. Katz, Handoffs in cellular wireless networks: the Daedalus implementation and experience, Kluwer International Journal on Wireless Communication Systems. January 1997.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....a considerable body of research toward improving performance of wireless data networks. Achievements of such research include smarter radio transmission (e.g. adaptive array antennas) 17] better channel access schemes [30] more efficient scheduling schemes [19] faster and intelligent hand offs [25], and transport protocols that are wireless aware [4, 26] Although the aforementioned approaches do improve the performance of wireless data networks, they are inherently limited by the network model that they operate on, namely the cellular network model. In the cellular network model, ....

S. Seshan, H. Balakrishnan, and R. Katz. Handoffs in cellular wireless networks: The Daedalus implementation and experience. Kluwer Journal on Wireless Personal Communications, 4(2):141--162, Mar. 1997.

....be used to instruct neighbouring multicast enabled routers to join the MN s virtual multicast group, either prior to or during handovers. This can be visualised as a multicast cloud centred on the MN s current location but also covering future locations. Examples include Dense mode multicast based [SBK95][MB97] TPL99] and the recent Sparsemode multicast based [MSA00] MANET based Schemes: MANET protocols were originally designed for mobile adhoc networks, where both hosts and routers are mobile, i.e. there is no fixed infrastructure. The routing is multi hop and adapts as the MNs move and ....

Seshan, S., Balakrishnan H., Katz, R. H., "Handoffs in Cellular Wireless Networks: The Daedalus Implementation and Experience", ACM/Baltzer Journal on Wireless Networks, 1995.

....our scheme achieves much higher aggregation gain than conventional prefix based aggregation. I. INTRODUCTION IP mobility addresses the problem of changing network pointof attachment transparently during movement. Mobile IP[4] 5] is the current IP mobility standard. However, several studies [1][3][7] have shown that Mobile IP has poor performance during handoff due to communication overhead with the home agent. Micro mobility techniques attempt to improve handoff performance by either using per domain foreign agents[7] 26] 27] or hierarchical approaches) or by using complex caching and ....

....When MN moves, it obtains a new IP address and updates the DNS mapping for its host name. This incurs handoff latency due to DNS update delays and is not suitable for delay bounded applications. Also, this scheme is not transparent to the transport protocol that is aware of the mobility. In[3] the HA tunnels packets using a pre arranged multicast group address. The access router, to which the MN is currently connected, joins the group to get data packets over the multicast tree. This approach suffers from the triangle routing problem; packets are sent to HA first and then to MN. ....

S. Seshan, H. Balakrishnan, R. Katz, "Handoffs in Cellular Wireless Networks: The Daedalus Implementation and Experience", Kluwer Journal on Wireless Networks, 1995.

....protocol backing off in terms of data transmission rate. TCP is the dominant transport layer protocol in the IP protocol suite which was not initially designed for wireless networks. A considerable amount of research has been carried out in the area of TCP throughput over Mobile IP environments [3] [4] 5] 6] The basic approach in [3] to eliminate data loss is to multicast data from the HA to all the nearby FAs on anticipation of handover. This method can effectively reduce packet losses and handover delay, but incurs some traffic overhead. In order to improve TCP throughput, the authors ....

....transmission rate. TCP is the dominant transport layer protocol in the IP protocol suite which was not initially designed for wireless networks. A considerable amount of research has been carried out in the area of TCP throughput over Mobile IP environments [3] 4] 5] 6] The basic approach in [3] to eliminate data loss is to multicast data from the HA to all the nearby FAs on anticipation of handover. This method can effectively reduce packet losses and handover delay, but incurs some traffic overhead. In order to improve TCP throughput, the authors in [4] proposed to recover packets ....

S. Seshan H. Balakrishna and R. H. Katz, "Handoffs in cellular wireless networks: The daedalus implementation and experience," Wireless Personal Communications, vol. 4, pp. 141--162, 1997.

....scheme achieves much higher aggregation gain than conventional prefix based aggregation. I. INTRODUCTION IP mobility addresses the problem of changing network pointof attachment transparently during movement. Mobile IP (MIP) 4] 5] is the current IP mobility standard. However, several studies [1][3][7] have shown that Mobile IP has poor performance during handoff due to communication overhead with the home agent. Micro mobility techniques attempt to improve handoff performance by either using per domain foreign agents[7] 26] 27] or hierarchical approaches) or by using complex caching and ....

S. Seshan, H. Balakrishnan, R. Katz, "Handoffs in Cellular Wireless Networks: The Daedalus Implementation and Experience", Kluwer Journal on Wireless Networks, 1995.

....requires updates to the home agent, that then introduces scalability concerns; it also impacts QoS support, requiring the establishment of new QoS mappings end to end even though mobility is typically localized. Another common approach for reducing disruption is through the use of multicasting [6]. However, join latency and group management issues in multicasting based solutions could result in loss of efficiency due to wasted bandwidth. These considerations also impact scalability in the backbone routers where every mobile host s multicast address needs to be managed. One approach that ....

....scheme is optimized for networks where the mobile host is able to listen transmit to only one base station as in the case of a Time Division Multiple Access (TDMA) network. Again, Non Forwarding schemes have been studied in the context of ATM networks [5] and in the multicasting based approaches [6]. HAWAII differs from these approaches in that our schemes perform the redirection based on host based entries rather than relying on general purpose multicast routing protocols. Therefore our handoff latencies are less than the join latencies of multicast based approaches. Furthermore, the MNF ....

S. Seshan, H. Balakrishnan, and R. H. Katz, "Handoffs in cellular wireless networks: The daedalus implementation and experience," International Journal on Wireless Communication Systems, 1996.

....network or cellular network. Handover techniques are very important in mobile networking because roaming is often accompanied by changing base stations to connect. In many previous works, methods of reducing handover delay have been studied in continuous communication environment between cells[8][9], or between networks[10] These researches are mainly focused on the delay intolerable applications such as real time ones, while we think mobiles will utilize delay tolerable applications like large file downloading with proactive data transfer. To support anytime, anywhere communications, ....

S. Seshan, H. Balakrishnan, and R. Katz, "Handoffs in Cellular Wireless Networks: The Daedalus Implementation and Experience, " Kluwer International Journal on Wireless Personal Communications, 1997.

....hot spotted network. In mobile computing, handover techniques are very important because roaming is often accompanied by changing base stations to connect. In many previous works, methods of reducing handover delay have been studied in continuous communication environment between cells [7][8], or between networks [9] These researches mainly focus on the delay intolerable applications. As for hot spotted network, communication is fundamentally discontinuous. Therefore, we think delay tolerable applications such as music or moving picture downloading. In overlay network environment, ....

S. Seshan, H. Balakrishnan, and R. Katz, " Handoffs in Cellular Wireless Networks: The Daedalus Implementation and Experience," Kluwer International Journal on Wireless Personal Communications, 1997.

....all FAs in the route from the domain foreign agent to the MH s FA have to keep the MH location information, which may cause a bottleneck as the number of MHs increases. Also, the handoff can again be slow when the lowest common ancestor is very high up the tree. The scheme of Seshan et al. [4] is to assign each MH a multi cast address. When an MH registers an FA, this FA identifies the handoff targets and makes them join the multicast group of MH. These handoff targets buffer the last packets to transmit in case of a hand off. This scheme avoids the wasteful trip to HA to make it aware ....

S. Seshan, H. Balakrishan, and R. H. Katz, Handoffs in Cellular Wireless Networks : The Daedalus Implementation and Experience, Kluwer International Journal on Wireless Personal Communications, January 1997.

....through hot spotted network. In mobile computing, handover techniques are very important because roaming is often accompanied by changing base stations to connect. In many previous works, methods of reducing handover delay have been studied in continuous communication environment between cells [7][8], or between networks [9] These researches mainly focus on the delay intolerable applications. As for hot spotted network, communication is fundamentally discontinuous. Therefore, we think delay tolerable applications such as music or moving picture downloading. In overlay network environment, ....

S. Seshan, H. Balakrishnan, and R. Katz, "Handoffs in Cellular Wireless Networks: The Daedalus Implementation and Experience," Kluwer International Journal on Wireless Personal Communications, 1997.

....protocol backing off in terms of data transmission rate. TCP is the dominant transport layer protocol in the IP protocol suite which was not initially designed for wireless networks. A considerable amount of research has been carried out in the area of TCP throughput over Mobile IP environments [3] [4] 5] 6] The basic approach in [3] to eliminate data loss is to multicast data from the HA to all the nearby FAs on anticipation of handover. This method can effectively reduce packet losses and handover delay, but incurs some traffic overhead. In order to improve TCP throughput, the authors ....

....transmission rate. TCP is the dominant transport layer protocol in the IP protocol suite which was not initially designed for wireless networks. A considerable amount of research has been carried out in the area of TCP throughput over Mobile IP environments [3] 4] 5] 6] The basic approach in [3] to eliminate data loss is to multicast data from the HA to all the nearby FAs on anticipation of handover. This method can effectively reduce packet losses and handover delay, but incurs some traffic overhead. In order to improve TCP throughput, the authors in [4] proposed to recover packets ....

S. Seshan H. Balakrishna and R. H. Katz, "Handoffs in cellular wireless networks: The daedalus implementation and experience, " Wireless Personal Communications, vol. 4, pp. 141--162, 1997.

....the recovery of hard state at the agents (after a failure) and the mobile moving out of range that would not exist with soft state. If we redid the implementation today, we would use only soft state at the agents. For more information on overlay networking see [8, 9] on low latency handoffs see [10, 11]; and on power management see [6] Reliable Data Transport over Wireless Networks Reliable data transport underlies many of the critical end user applications supported in today s Internet, including file transfer, electronic mail, and access to the World Wide Web. It is extremely challenging ....

S. Seshan, H. Balakrishnan, and R. H. Katz, "Handoffs in Cellular Wireless Networks: The Daedalus Implementation and Experience," Kluwer J. Wireless Pers. Commun., Jan. 1997.

....the problem described in the previous paragraph we suggest an alternative architecture. Specifically, we adopt the use of a path prediction algorithm and the proactive formulation of datagram caches in adjacent BSs. This scheme is quite similar to the Daedalus project approach, reported in Ref. [6], where traffic destined to the MT is multicast (by the Home Agent of Mobile IP) to all the BSs being adjacent to the one currently used. A combined multicast Snoop scheme is reported in Ref. 27] To reduce the increased traffic overhead associated with the solution reported in Ref. 27] and ....

S. Seshan, H. Balakrishnan, R. Katz, Handoffs in cellular wireless networks: the Daedalus implementation and experience, Kluwer International Journal on Wireless Communication Systems (1996).

....that are made by the network management system on the wired network. A primary objective of handoff protocols is to minimize the handoff delay and preserve the end to end communication link with the mobile host. There has been a lot of research on handoff protocols, such as that presented in [9] and [3] In [9] Seshan et al. propose to reduce handoff latency and eliminate data loss by using IP multicasting and intelligent buffering in neighboring base stations. In [3] R. Caceres and V. Padmanabhan propose to reduce handoff delay by using a hierarchical mobility management scheme that ....

....by the network management system on the wired network. A primary objective of handoff protocols is to minimize the handoff delay and preserve the end to end communication link with the mobile host. There has been a lot of research on handoff protocols, such as that presented in [9] and [3] In [9], Seshan et al. propose to reduce handoff latency and eliminate data loss by using IP multicasting and intelligent buffering in neighboring base stations. In [3] R. Caceres and V. Padmanabhan propose to reduce handoff delay by using a hierarchical mobility management scheme that separates global ....

[Article contains additional citation context not shown here]

S. Seshan, H. Balakrishnan, and R. H. Katz, "Handoffs in cellular wireless networks: The daedalus implementation and experience," Kluwer Journal on Wireless Personal Communications, 1996.

No context found.

S. Seshan, H. Balakrishnan, and R. H. Katz, "Handoffs in cellular wireless networks: The Daedalus implementation and experience," Kluwer J. Wireless Personal Commun., Jan. 1997.

No context found.

S. Seshan, H. Balakrishnan, R. Katz, Handoffs in cellular wireless networks: the Daedalus implementation and experience, Kluwer International Journal on Wireless Communication Systems. January 1997.

No context found.

S. Seshan, H. Balakrishnan, and R. Katz. Handoffs in Cellular Wireless Networks: The Daedalus implementation and experience. Kluwer International Journal on Wireless Communication Systems, 1997.

No context found.

S. Seshan, H. Balakrishnan, and R. Katz, "Handoffs in cellular wireless networks: The Daedalus implementation and experience," 1996.

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S. Seshan, H. Balakrishnan, R. Katz, "Handoffs in Cellular Wireless Networks: The Daedalus Implementation and Experience", Kluwer Journal on Wireless Networks, 1995.

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S. Seshan, H. Balakrishnan, and R. H. Katz, "Handoffs in cellular wireless networks: The daedalus implementation and experience," International Journal on Wireless Communication Systems, 1996.

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S. Seshan, H. Balakrishnan, and R. Katz, "Handoffs in cellular wireless networks: The Daedalus implementation and experience," Kluwer Int. J. Wireless Pers. Commun., vol. 4, no. 2, pp. 141--162, Mar. 1997.

No context found.

S. Seshan, H. Balakrishnan, and R. Katz, "Handoffs in cellular wireless networks: The Daedalus implementation and experience," 1996.

No context found.

S. Seshan, H. Balakrishnan, and R. H. Katz, "Handoffs in Cellular Wireless Networks: The Daedalus Implementation and Experience," Wireless Personal Communications, vol. 4, pp. 141--162, Mar. 1997.

No context found.

S. Seshan, H. Balakrishnan, and R. H. Katz, "Handoffs in Cellular Wireless Networks: The Daedalus Implementation and Experience," Wireless Personal Communications, vol. 4, no. 2, pp. 141--162, Mar. 1997.

No context found.

Seshan S, Balakrishnan H, and Katz RH, " Handoffs in Cellular Wireless Networks: The Daedalus Implementation and Experience", Kluwer International Journal on Wireless Personal Communications, January 1997.

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