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whitepaper This paper studies the capability of the link layer to hide losses over the wireless link to TCP in spite of the time varying transmission quality. It focuses on link-layer retransmission mechanisms and determines their parameter setting in such a...
[14 Jan 2008]
whitepaper We study a wireless access system with adaptive modulation and coding (AMC) at the physical layer, finite-length queuing at the data link layer and a TCP protocol at the transport layer. This paper presents a simple cross-layer design, which...
[14 Jan 2008]
whitepaper The aspects investigated are the impact of channel prediction errors, channel scheduling, delay, and adaptive modulation switch level, on TCP performance. Test-bed results on transport layer performance are presented and analyzed in relation to...
[26 Dec 2007]
whitepaper The novel TCP variant is denoted as TCP with Adaptive Pacing (TCP-AP). Opposed to previous proposals for improving TCP over multihop IEEE 802.11 networks, TCP-AP retains the end-to-end semantics of TCP and does neither rely on modifications on the...
[19 Dec 2007]
whitepaper With the continuing emergence of wireless technologies ever since the work on TCP performance over wireless began, smart link-layer mechanisms like adaptive modulation and coding, power control, and incremental redundancy have been designed and...
[05 Dec 2007]
whitepaper This paper studies a wireless access system with Adaptive Modulation and Coding (AMC) at the physical layer, finite-length queuing at the data link layer and a TCP protocol at the transport layer. Guided by the performance analysis, a simple cross...
[05 Dec 2007]
whitepaper Researchers and developers have explored a wide range of solutions to optimize communication in this difficult error environment, including traditional end-to-end solutions, link-layer solutions, and solutions involving layer four processing...
[05 Dec 2007]
whitepaper Link adaptation is one approach focusing on through building a reliable MAC and PHY layer to provide committed QoS. This paper presents an optimal frame length predictor in terms of maximizing the channel utilization.
[04 Dec 2007]
whitepaper An adaptive algorithm is presented to automatically adjust parity data length in error control. Radio link layer, transport layer, and application layer are combined to deal with high error rate in wireless environments.
[01 Aug 2007]
whitepaper This paper proposes a new protocol, called the adaptive multipath protocol, to achieve efficient IP handoff. Based on link-layer signal strength measurements, two different schemes are used to handle soft and hard handoff respectively.
[01 Aug 2007]
whitepaper In this paper, the authors propose a cross-layer adaptive resource allocation algorithm for packet-based OFDM systems. This algorithm takes into consideration not only the physical channel conditions but also the random traffic arrival, QoS...
[11 Apr 2007]
whitepaper This paper proposes a novel error protection method that can provide adaptive quality-of service (QoS) to layered coded video by utilizing priority queueing at the network layer and retry-limit adaptation at the link layer.
[02 Nov 2006]
whitepaper This paper discusses various MAC layer protocols that exploit the potentials of hardware like Directional antenna and rate adaptive wireless devices. The paper also presents the protocol that does not require any hardware support, instead it acts...
[30 Jun 2006]
whitepaper The 802.11g physical layer standard specifies a link adaptive COFDM scheme for operation in the 2.4GHz ISM band. In this paper, the impact of Bluetooth interference upon the physical layer of 802.11g is investigated and methods to mitigate this...
[09 Feb 2006]
whitepaper This paper explores the possibility of improving the reverse link performance (in terms of coverage and data throughput) of IS-856 using adaptive antenna array receivers. Specifically, it considers the effect of array size, configuration and...
[17 Jan 2006]
whitepaper This paper focuses on Bluetooth and proposes an enhancement to the Bluetooth link layer ARQ mechanism to compensate for channel degradation and to better support audio streaming. Streaming audio has become a popular form of media on the Internet.
[29 Sep 2005]
whitepaper This paper focuses on Bluetooth and proposes, an enhancement to the Bluetooth link layer ARQ mechanism to compensate for channel degradation and to better support audio streaming. Streaming audio has become a popular form of media on the Internet.
[12 Aug 2005]
whitepaper This paper explores the possibility of improving the reverse link performance (in terms of coverage and data throughput) of IS-856 using adaptive antenna array receivers. Specifically, it considers the effect of array size, configuration and...
[03 Aug 2004]
whitepaper With Lifetime Packet Discard (LPD) a flow adaptive link can tailor the trade-off between the maximum delay jitter and reliability if quality of service requirements of a flow are known. This paper proposes using an IP option to communicate the flow...
[25 Jun 2004]
whitepaper Adaptive OFDM is a technique that can improve the performance of OFDM in terms of increasing the capacity for a given transmit power by exploiting the channel condition over a link. However, adaptive OFDM can be also exploited in ad hoc networks to...
[19 Jun 2004]
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