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Publikācija: Wireless Network Security in Real-Time Applications

Publication Type Publications in RTU scientific journal
Funding for basic activity Unknown
Defending: ,
Publication language Latvian (lv)
Title in original language Bezvadu tīklu drošības risinājumi reāla laika lietojumiem
Title in English Wireless Network Security in Real-Time Applications
Field of research 2. Engineering and technology
Sub-field of research 2.2 Electrical engineering, Electronic engineering, Information and communication engineering
Authors Aigars Riekstiņš
Keywords Wireless networks, network parameters, real time systems, network parameter measurements
Abstract Rakstā tiek sniegti 802.11 bezvadu lokālo datortīklu reālā laika parametru mērījumi saistībā ar izvēlēto kriptēšanas veidu. Tīkla parametru pētījumi veikti lauksaimniecības tehnikas darbības atbalsta tīkla kontekstā ar mērķi - aizvietot esošās vadu savienojuma sistēmas ar standarta 802.11 bezvadu risinājumu. Pēdējo gadu laikā lauksaimniecības tehnika tiek virzīta lielākas automatizācijas un ciešākas pārvaldības virzienā. Šie mērķi pieprasa liela apjoma datu komunikācijas iespēju savienojumā ar reālā laika uzdevumu atbalstu vienotā bezvadu infrastruktūrā. Dotajā darbā sniegtais tīkla reālā laika parametru novērtējums balstās uz tīkla mērījumu veikšanu kontrolētos apstākļos un tiek veikts salīdzinājums ar 802.3 Ethernet tīkla darbību līdzīgos apstākļos.
Abstract in English In this article a study of a wireless network system for agricultural facilities has been carried out. The proposed system consists of standard 802.11 hardware and Linux OS, which support application-level protocol of special usage case. Such protocol is developed right now in STRATOS project and therefore a test of such system real time response is needed. This research extends previously made tests with comparison of wired and wireless infrastructure and in particular discovers system working parameters with regard of encryption in wireless networks. For such tests systems analogue design was implemented in custom made application and testing was done in laboratory conditions. As a platform of choice Linux 2.6.33.7.2 kernel with RT preempt patches was chosen as it is heading for inclusion in mainline kernel tree. Experiments revealed the potential for real-time system operating limits and dependence of these limits on the wireless network encryption. The existing 802.11b standard equipment and a modern Linux kernel with real time patches give a combination that can provide real-time applications with the required 50-millisecond round trip time for both encrypted and unencrypted mode. Future testing can be extended with regard of external influences, for example, by performing field tests. Also there can be gains in usage of coordinated wireless infrastructure in point coordination function mode. This research also shows that by using the latest 802.11g or 802.11n standard hardware, the system will comply with given time limits with an even larger margin because measured packet processing time at systems is low enough (most of the time is spent in data reception and forwarding in physical environment). Test results show that the proposed system architecture is a promising solution for low latency communication in both industrial and mobile applications.
Reference Riekstiņš, A. Wireless Network Security in Real-Time Applications. Technologies of Computer Control. Vol.48, 2011, pp.51-55. ISSN 1407-7493.
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