Performance Analysis of Traffic Sensitive Wireless Body Area Networks

Öz

The cooperation of micro-electronics, wireless communications, integrated circuits and sensor networks have led to rise of Wireless Body Area Networks (WBANs). The aim of WBANs is to keep a human body under control by means of a set of small-size, lightweight, and low-power sensor nodes placed in, on, or around the human body. The WBANs are also used in a number of new applications namely health monitoring, entertainment, sports, and military applications. The sensor nodes in WBANs have limited energy resources as a result of communicating with each other wirelessly. Therefore, the medium access control protocols for WBANs must be energy efficient protocols. Also, WBAN’s importance of having the different data traffics has increased determination of operation sequence at the coordinator nodes. In this study, data traffic sensitive WBAN is proposed. End to end delay and throughput results are examined for performance evaluation.

Anahtar Kelimeler

• Wireless body area networks, Medium access protocol, Non-preemptive priority queue model

Trafik Duyarlı Kablosuz Vücut Alan Ağlarının Başarım Analizi

Öz

Mikro elektronik, kablosuz haberleşme, tümleşik devreler ve algılayıcı ağların sağlık alanında birlikte kullanılması, Kablosuz Vücut Alan Ağları’nın (Wireless Body Area Networks, WBANs) ortaya çıkmasını sağlamıştır. WBAN ile insan vücuduna yerleştirilmiş küçük boyutlu, enerji tüketimi düşük kablosuz algılayıcı düğümler sayesinde insan vücudunun gözetim altında tutulması amaçlanmaktadır. Günümüzde WBAN sağlık, spor, eğlence, askeri uygulama gibi birçok alanda kullanılmaktadır. Ağı oluşturan algılayıcı düğümler kablosuz olarak çalıştıkları için sınırlı enerji kaynaklarına sahiptirler. Bu sebeple, WBAN’lar için kullanılacak ortam erişim protokollerinin enerjiye duyarlı olması gerekmektedir. Ayrıca WBAN’ların farklı veri trafiklerine (normal, isteğe bağlı ve acil) sahip olması, koordinatör düğümlerde veri işlem sırasının belirlenmesinin önemini arttırmıştır. Bu çalışmada, veri trafiğine duyarlı bir WBAN yapısı tasarlanmıştır. Tasarlanan yapının başarım analizi için uçtan-uca gecikme ve iş çıkarma oranı sonuçları incelenmiştir.

Anahtar Kelimeler

• Kablosuz vücut alan ağları, Ortama erişim Protokolü, Engellemeyen öncelikli kuyruk modeli

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