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The Mobile IP Handoff Between Hybrid Networks
White Paper This paper introduces two main technologies GPRS network and IEEE 802.11 WLAN, which will be widely deployed. It also analyze the Mobile IP handoff between hybrid networks and propose our handoff scheme, which reduces the handoff delay, packet loss... [03 Jul 2008]
Indoor Propagation and Wavelength
White Paper This paper examines the propagation of frequency bands relevant for wireless local area networks - IEEE 802.11, Bluetooth, and HiperLAN -- in typical indoor environments. The UNII band has no intrinsic disadvantage of range for indoor use, at least... [03 Jul 2008]
An Enhanced Lightweight Authentication Protocol for Access Control in Wireless LANs
White Paper In this paper, an enhanced lightweight identity authentication protocol for access control in IEEE 802.11 networks are presented. The proposed protocol is nicely integrated with the current MAC frame structure and takes the most advantage of the... [15 Jan 2008]
Packet Loss in TCP Hybrid Wireless Networks
White Paper The paper starts from channel state measurements done on a fixed-speed IEEE 802.11 terrestrial channels and it use the ns-2 simulator to evaluate the performance of TCP on it. The reason is that such networks exhibit both a high latency and a high... [27 Dec 2007]
Evaluating TCP With Corruption Notification in an IEEE 802.11 Wireless LAN
White Paper Reliable transport protocols like TCP perform very well on wired computer networks; packet loss is primarily caused by congestion and much less frequently due to physical or link layer problems. On the other hand, in wireless links TCP performance... [27 Dec 2007]
Performance Evaluation of TCP Over Wireless Channel Conditions
White Paper The rise of IEEE 802.11 Wireless Local Area Networks (WLANs) is challenging the original design of TCP. The fundamental problem is that TCP is unable to classify the cause of loss, treating all losses as a sign of congestion within the network. [20 Dec 2007]
TCP With Variance Control for Multihop IEEE 802.11 Wireless Networks
White Paper Eventually, the link level gives up after a maximum number of retransmissions and TCP detects a loss. This paper argues that a cause of poor performance of TCP NewReno in wireless ad hoc networks is the use of packet drop as feedback for window... [06 Dec 2007]
Adaptive Optimal Frame Length Predictor for IEEE 802.11 Wireless LAN
White Paper Wireless channel is dynamically time-varying and bursty caused by fading, noise and interference, shadowing, path loss and so forth. This paper presents an optimal frame length predictor in terms of maximizing the channel utilization. [05 Dec 2007]
On TCP Performance in Multihop Wireless Networks
White Paper This paper studies TCP performance over static, ad hoc networks that use IEEE 802.11 protocol as the access method. However, TCP does not operate around this optimal point, and typically grows its window much larger; this leads to decreased... [07 Nov 2007]
The Impact of Multihop Wireless Channel on TCP Throughput and Loss
White Paper This paper studies TCP performance over multihop wireless networks that use the IEEE 802.11 protocol as the access method. However, TCP does not operate around W*, and typically grows its average window size much larger; this leads to decreased... [07 Nov 2007]
Expected Data Rate: An Accurate High-Throughput Path Metric for Multi-Hop Wireless Routing
White Paper The transmission interference model also takes the non-optimality of IEEE 802.11 medium access scheduling into account. This paper constructs a realistic and practical transmission interference model by determining transmission contention degree of... [23 Aug 2007]
Packet Scheduling for Video Streaming Over Wireless With Content-Aware Packet Retry Limit
White Paper This paper proposes a content-aware retry limit adaptation scheme for video streaming over IEEE 802.11 Wireless LANs (WLANs). The loss impact of each packet is estimated to guide the selection of its retry limit. [31 May 2007]
The Impact of Multihop Wireless Channel on TCP Performance
White Paper This paper studies TCP performance in a stationary multihop wireless network using IEEE 802.11 for channel access control. The paper explains the TCP throughput decrease using the observations and analysis of the packet loss in an overloaded... [23 Jun 2006]
On Optimization of CSMA/CA Based Wireless LANs: Part II - Mitigating Efficiency Loss
White Paper Most current deployments of IEEE 802.11 based wireless LANs suffer from various inefficiencies arising from the interactions of MAC and Physical layers. These inefficiencies often limit network users from reaping the full potential of the high... [16 Jun 2006]
A Media-Oriented Transmission Mode Selection in 802.11 Wireless LANs
White Paper The paper discusses the modifications needed for the control and data-packet headers to implement the approach in the framework of the IEEE 802.11 standards. The main goal of this mechanism is to improve the effective throughput for transporting... [24 May 2006]
