SUMMARY Convergence is one of the most important challenges for Next Generation Networks (NGN). This includes service convergence as well as fixed-mobile convergence. The integration of satellite telecommunication system into NGN is a key to increasing the coverage of future networks and opening satellite access networks to a wider range of terrestrial solutions. Digital Video [...]
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So far Squire Tech has created 61 blog entries.
Dallas, Texas (PRWEB) August 07, 2013 – Today Katonah-Lewisboro School District announced the acquisition of the Squire Tech Solutions LLC Business Continuity 600 satellite communications package providing alternative emergency communications for the K-12 critical administrative location. The selection of Squire Tech came after months of research and analysis of alternative communications options should local telephone, [...]
First the good news: Universities and research institutions in Texas suffered far less damage than some had feared from Hurricane Ike. Now, the bad news: It could take weeks for the University of Texas Medical Branch (UTMB) on the flooded island of Galveston and satellite Texas A&M campuses in the Galveston area to be fully [...]
Comparison of measured rain attenuation in the 10.982-GHz band with predictions and sensitivity analysisSquire Tech2016-02-10T09:52:24+00:00
SUMMARY The campaign to collect rain attenuation data on terrestrial links had commenced in Malaysian tropical climates for almost two decades. The terrestrial data so far collected have been greatly utilized to derive useful statistics for various microwave applications, such as frequency scaling, rain rate conversion factor, 1-min rain rate contour maps, wet antenna losses, [...]
SUMMARY Satellite transmissions are prone to both unintentional and intentional RF interference. Such interference has significant impact on the reliability of packet transmissions. In this paper, we make preliminary steps at exploiting the sensing capabilities of cognitive radios for reliable satellite communications. We propose the use of dynamically adjusted frequency hopping (FH) sequences for satellite [...]
SUMMARY The pre-emption procedure is an important part of the radio resource management when dealing with the emergency traffic. It allows resources to be allocated to higher priority connections by pre-empting lower priority connections. The provision of the pre-emption mechanism becomes much more important in the case of satellite systems such as the Inmarsat Broadband [...]
SUMMARY Recently, Lee et al. proposed a simple and efficient authentication scheme for mobile satellite communication systems. However, we find that their scheme is vulnerable to the smart card loss attack, the denial of service attack and the replay attack. To overcome the weaknesses of Lee et al.'s scheme, we proposed an authentication scheme for [...]
ABSTRACTOne of the important functions of cognitive radio (CR) technology is spectrum sensing. The implementation of an efficient spectrum sensing function can be quite challenging because of various factors such as multi-path fading, low signal-to-noise ratio of the radio communication services to be detected and the requirement to detect and analyze the signal in a [...]
The combined automatic repeat request and rate control mechanism in S-band mobile interactive multimedia asynchronous return link—design background, parameter dimensioning and first experimental resultsSquire Tech2016-02-10T09:53:03+00:00
SUMMARY In the S-band mobile interactive multimedia specification, an asynchronous access using Enhanced Spread Spectrum Aloha random access has been defined for occasional messaging applications. This access scheme is complemented by a combined automatic repeat request and terminal rate control mechanism that is described in this paper. Furthermore, a queuing theory-based model is developed to [...]