Shiao-Li Tsao

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Machine-type communication (MTC) is a crucial service for next-generation cellular networks. Mass access to the network by MTC devices may result in the overload of radio access networks (RANs) and degrade the service quality of human-tohuman communication. Group paging is one of the mechanisms proposed to alleviate the RAN-overload problem. This paper(More)
Broadband wireless access systems usually provide flexible sleep-mode operations for mobile stations to conserve their energy during idle or active mode. For example, Mobile WiMAX, i.e. the IEEE 802.16e, offers several power-saving classes that can be associated with different types of network connections to minimize power consumption of mobile stations.(More)
0140-3664/$ see front matter 2010 Elsevier B.V. A doi:10.1016/j.comcom.2010.09.008 ⇑ Corresponding author. Address: 1001 University ROC. Tel.: +886 3 5712121x54717; fax: +886 3 57214 E-mail addresses: sltsao@cs.nctu.edu.tw (S.-L. Tsao Huang). In recent years, IEEE 802.11 wireless local area networks (WLANs) have been widely deployed, and more and more(More)
Broadband wireless access systems usually provide flexible sleep-mode operations for mobile stations to conserve energy during idle or active modes. For example, the IEEE 802.16e offers several sleep-mode classes that can be applied to mobile subscriber stations (MSSs) to reduce their power consumptions for different applications. Unfortunately, previous(More)
This paper presents a combinatorial model and approximation formulas to estimate the average number of successful and collided users for a one-shot random access in finiteuser multichannel slotted ALOHA systems. The proposed model and approximation can be used to evaluate the performance of group paging for machine-type communication (MTC) in 3GPP LTE.(More)
Energy efficiency has become one of the most important design issues for embedded systems. To examine the power consumption of an embedded system, an energy profiling tool is highly demanded. Although a number of energy profiling tools have been proposed, they are not directly applicable to the embedded processors with power management functions that are(More)