Title :
Power-efficient and QoS-aware scheduling in Bluetooth scatternet for wireless PANs
Author :
Joo, Yang-Ick ; Lee, Tae-Jin ; Eom, Doo Seop ; Lee, Yeonwoo ; Tchah, Kyun Hyon
Author_Institution :
Korea Univ., Seoul, South Korea
Abstract :
In this paper, we propose a power-efficient and QoS (quality of service)-aware MAC (medium access control) scheduling algorithm for Bluetooth scatternet. If the inter-piconet scheduler in a bridge node between piconets operates simply by the round robin (RR) policy, a number of time slots may be wasted due to the guard time for piconet switching and the exchange of POLL-NULL packets. To overcome the link wastage problem in Bluetooth scatternet scheduling, several algorithms have been proposed. Although they can provide all of the links of a bridge node with fair service opportunities, they may cause waste of wireless resources since different Bluetooth devices may have various traffic characteristics. In addition, since Bluetooth devices are often required to operate under limited battery capacity, the number of unnecessary piconet switching has to be minimized for the power-efficient operation of a Bluetooth scatternet. Therefore, we propose a mechanism to support the power-efficient operation of a Bluetooth scatternet while guaranteeing various QoS requirements of Bluetooth devices. The proposed algorithm is compliant with the current Bluetooth specification, and we demonstrate its improved performance via simulations.
Keywords :
Bluetooth; access protocols; minimisation; packet switching; personal communication networks; quality of service; scheduling; telecommunication traffic; Bluetooth devices; Bluetooth scatternet; MAC; POLL-NULL packets; QoS; interpiconet scheduler; link wastage problem; medium access control; personal area networks; piconet switching; power-efficient operation; quality of service; round robin policy; scheduling algorithm; wireless PAN; Batteries; Bluetooth; Bridges; Media Access Protocol; Packet switching; Personal area networks; Quality of service; Round robin; Scattering; Scheduling algorithm;
Journal_Title :
Consumer Electronics, IEEE Transactions on
DOI :
10.1109/TCE.2003.1261197