conditions channel
An Approach to Enhance the QoS Support to Real-Time Traffic on IEEE 802.11e Networks
White Paper The proposed solution does not change the IEEE 802.11e protocol, but introduces a technique to reduce the number of collisions and therefore to use the channel more efficiently for real-time traffic, especially when the traffic load is high and... [18 Jul 2008]
Dynamic Bandwidth Allocation for Multimedia Traffic With Rate Guarantee and Fair Access in WCDMA Systems
White Paper Packet scheduling in a WCDMA system poses a new challenge due to its nature of variable bit rates and location-dependent, time-varying channel conditions. In this work, three new downlink scheduling algorithms for a WCDMA base station are proposed... [11 Jul 2008]
Dynamic Load Balancing Through Coordinated Scheduling in Packet Data Systems
White Paper It consider algorithms that assume complete knowledge of the channel quality information from each of the base-stations to the terminals at the centralized scheduler as well as a two-tier scheduling strategy that assumes only the knowledge of the... [10 Jul 2008]
Multipath Load Balancing in Multi-Hop Wireless Networks
White Paper However, a careful investigation of the issue reveals that under certain theoretic conditions, significant gains are possible. Given the inherent interference of multi-hop transmissions in a single radio channel, it is generally assumed that single... [10 Jul 2008]
A Network Service Providing Wireless Channel Information for Adaptive Mobile Applications: Part I: Proposal
White Paper In this paper, we propose a network service that collects and processes PHY/MAC layer parameters for wireless channel conditions and provides them to adaptive mobile applications in clearly defined abstracted forms to aid them in their adaptation... [03 Jul 2008]
Achievable Rate Regions for Bluetooth Piconets in Fading Channels
White Paper This paper explains the performance limits, in terms of achievable rate region, for a Bluetooth piconet operating in fading channel conditions. The paper shows how, given channel conditions and packet formats, the problem of defining the achievable... [03 Jul 2008]
Exploiting Medium Access Diversity in Rate Adaptive Wireless LANs
White Paper Recent years have seen the growing popularity of multi-rate wireless network devices (e.g.a cards) that can exploit variations in channel conditions and improve overall network throughput. Concurrently, rate adaptation schemes have been developed... [03 Jul 2008]
Turbo-Coded ARQ Schemes for DS-CDMA Data Networks Over Fading and Shadowing Channels: Throughput, Delay, and Energy Efficiency
White Paper In this paper, modified ARQ (Automatic-Repeat-Request) techniques based on turbo coding are investigated for asynchronous DS-CDMA (Direct-Sequence Code-Division Multiple-Access) data networks under shadowing and frequency selective fading channel... [03 Jul 2008]
An Efficient Polling Strategy for Bluetooth Piconets Using Channel State Information
White Paper However in environments with high interference or mobility, the channel conditions can mitigate the performance of the polling strategies. In general the performance evaluation of most piconet scheduling algorithms recently proposed do not consider... [03 Jul 2008]
Comparison of W-CDMA and cdma2000
White Paper The comparative investigation of these 3G alternatives reveals that system capacities are more or less in the same range, with slight advantage of W-CDMA when using comparable transmission technologies and channel conditions. [03 Jul 2008]
An Overview of TCP Performance Enhancement
White Paper These environments are characterized by high link delays (even cellular links can have delays of the order of 100ms-200ms), impaired channel conditions, frequent handoffs. This white paper summarizes the current state of the art in TCP performance... [03 Jul 2008]
Feature Development of Orderwire for a OC-192 Rate Product
White Paper Orderwire provides voice channel for communications during equipment installations and upgrades, and also for maintenance while identifying network fault conditions. There was a need to introduce Orderwire over SONET/SDH in "OC-192 broadband... [03 Jul 2008]
Performance Evaluation of IEEE 802.16 for Broadband Wireless Access
White Paper The proposed MAC supports a range of physical layer technologies and provides manufacturers with the option of switching modulation and coding schemes based on the channel conditions. Broadband Wireless Access (BWA) is drawing a great deal of... [03 Jul 2008]
A Model for TCP Behaviour Over Cellular Radio Channels With Link Layer Error Recovery
White Paper The paper shows how the model can be used to predict packet latency, optimally dimension the buffer, and tune TCP to ensure maximum utilisation of the link, for specific wireless channel conditions. This paper presents a model for characterising... [03 Jul 2008]
On the Impact of Fading and Inter-Piconet Interference on Bluetooth Performance
White Paper Hence, the proposed method is illustrated by investigating the potential performance tradeoff among the different radio packet formats supplied by Bluetooth, as a function of the radio channel conditions and interference levels. [03 Jul 2008]
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