HiperLAN/2 and the evolution of wireless LANs

Sicher, A.

doi:10.1109/ets.2000.916529

Cited by 3 publications

(3 citation statements)

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“…Intel AT includes several hardware-based detection mechanisms that can trigger a lock down. Detection mechanisms can be local (based on IT policy) or remote (via LAN [22], WLAN, or 3G [3] In the above case except case (d) the system goes in theft mode and starts an automatic hardware lockdown even if the system is booted or boot order is changed, and in the case of option (d) whenever it is in the 3G network range [10][19] [20] it send a message to its server consisting of its GPS coordinates.…”

Section: Related Work Intel's Antitheft Technologymentioning

confidence: 99%

A New Approach to Theftware-Efficient Solution

Kumar¹

2012

ACIJ

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Theftware is software cum a proposed firmware which helps to track down a laptop in case of theft. Now a days, cases of laptop theft are becoming too frequent and prominent as it's a pretty easy as well as rewarding affair for the burglars. Especially in the second and third world countries, where the hitherto technologies are not up to the international standards i.e. there is a big lacunae between the western countries and the developing countries in terms of technological infrastructure. In such places to prevent, stop, and track down of such cases of nuisance, we propose a model named Theftware which is a sinequa-non as it's being developed with an eye that it's for the masses and not for the few selected. We also purpose a central server with a database of all the registered laptop users in the world which will be under the control of a government regulatory authority or it may be an autonomous one, depending on the requirements, need and power required to be vested in them. All the companies i.e. laptop manufacturers or service providers needs to enter all the details of their customers along with the information of laptop sold to them. The registered users in case of theft will report to this regulatory authority that will verify the request and report to the server if required. The work of Theftware starts from here as it periodically checks the central database to verify that the laptop has been stolen or not. If the laptop is found under scrutiny it will report to the server with the detailed information of its present location, so that it can be tracked by the regulating authority. In this paper we have proposed how an ordinary laptop can be vested with a Theftware process and how this process collects the system details along with the process of communication with the remote server. In this paper we have also discussed the scheduling algorithm for the Theftware which is a sine-qua-non for the laptop's efficient performance along with the algorithm for the various processes inside Theftware. We have also prepared a comparative study which shows the laptops performance degradation on vesting with this software.

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Section: Related Work Intel's Antitheft Technologymentioning

confidence: 99%

A New Approach to Theftware-Efficient Solution

Kumar¹

2012

ACIJ

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“…Inter-symbol Interference (ISI) effects can be greatly reduced by the addition of a cyclic extension. OFDM has been adopted by a variety of standards including the IEEE 802.11 standard for wireless LANs operating at bit rates up to 30MB/s at 5GHz, and the European Telecommunications Standards Institute (ETSI) for Terrestrial TV [4].…”

Section: Introductionmentioning

confidence: 99%

OFDM/ Flash-OFDM™ re-configurable transceivers using general purpose processors

Nolan¹,

MacKenzie²,

Doyle³

et al. 2003

IEE Colloquium on DSP Enabled Radio

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This paper presents a novel approach for a multi-carrier software radio implementation of an OFDM transceiver using an extremely efficient OFDM frame synchronization technique. The signal processing engine is a general-purpose processor which allows total re-configurability of the transceiver in addition to enabling multiple transceivers to share a single hardware front-end. As an example to show how a complex hardware transceiver may be rapidly implemented and deployed by taking a software approach, The Networks and Telecommunications Research Group (NTRG) based in Trinity College Dublin has implemented their version of Flash-OFDM™; a frequency-hopping variation of OFDM based on a pseudo-random sequence. This scheme offers greater immunity to performance degradation in a communications link in addition to a basic data security feature resulting from the nature of the code-based frequency spreading.

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“…The time slot assignment is done by the access point and we assume that each of the users reports its true need for throughput as computed by the optimization algorithm. TDMA schemes have been used in several variations of WLANs, such as HiperLAN/2 [30], Bluetooth [31], and home RF networks.…”

Section: A Distributed Streaming Over Wireless Lansmentioning

confidence: 99%

Rate-distortion optimized distributed packet scheduling of multiple video streams over shared communication resources

Chakareski

Frossard

2006

IEEE Trans. Multimedia

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Abstract-We consider the problem of distributed packet selection and scheduling for multiple video streams sharing a communication channel. An optimization framework is proposed, which enables the multiple senders to coordinate their packet transmission schedules, such that the average quality over all video clients is maximized. The framework relies on rate-distortion information that is used to characterize a video packet. This information consists of two quantities: the size of the packet in bits, and its importance for the reconstruction quality of the corresponding stream. A distributed streaming strategy then allows for trading off rate and distortion, not only within a single video stream, but also across different streams. Each of the senders allocates to its own video packets a share of the available bandwidth on the channel in proportion to their importance. We evaluate the performance of the distributed packet scheduling algorithm for two canonical problems in streaming media, namely adaptation to available bandwidth and adaptation to packet loss through prioritized packet retransmissions. Simulation results demonstrate that, for the difficult case of scheduling nonscalably encoded video streams, our framework is very efficient in terms of video quality, both over all streams jointly and also over the individual videos. Compared to a conventional streaming system that does not consider the relative importance of the video packets, the gains in performance range up to 6 dB for the scenario of bandwidth adaptation, and even up to 10 dB for the scenario of random packet loss adaptation.

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HiperLAN/2 and the evolution of wireless LANs

Cited by 3 publications

References 0 publications

A New Approach to Theftware-Efficient Solution

A New Approach to Theftware-Efficient Solution

OFDM/ Flash-OFDM™ re-configurable transceivers using general purpose processors

Rate-distortion optimized distributed packet scheduling of multiple video streams over shared communication resources

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