Abstract
In the fourth generation or next generation networks, services of non-real-time variable bit rate (NRT-VBR) and best effort (BE) will dominate over 85% of the total traffic in the networks. In this paper, we study the power saving mechanism of NRT-VBR and BE services for mobile handsets (MHs) to prolong their battery lifetime (i.e., the sustained operation duration) in the fourth generation networks. Because the priority of NRT-VBR and BE is lower than that of real-time VBR (RT-VBR) or guaranteed bit rate (GBR) services, we investigate an extended sleep mode for lower priority services (e.g., NRT-VBR and BE) in an MH to conserve the energy. The extended sleep mode is used when the MH wakes up from the sleep mode but it cannot obtain the bandwidth from base station (BS). The proposed mechanism, named extra power saving scheme (EPSS), uses the Markovian queuing model to estimate the extended sleep duration to let MHs conserve their battery energy when the networks traffic is congested. To study the performance of EPSS, an accurate analysis model of energy is presented and validated by taking a series of simulations. Numerical experiments show that EPSS can achieve 43% extra energy conservation at most when downlink resource is saturated. We conclude that the energy of MHs can be conserved further by applying EPSS when the traffic load is saturated. The effect of energy saving becomes more obvious when the portion of NRT-VBR and BE services is greater than that of RT-VBR and GBR services.
Highlights
The fourth generation (4G) personal communication networks provide telecommunication and data access together for nomadic users by integrating telephone and computer networks into a single system [1,2]
Because power saving mechanisms (PSMs) uses the method that an mobile handsets (MHs) turns off its radio transceiver in idle time to conserve its energy, too much waiting time will decrease the efficiency of PSM
We present an MH PSM named extra power saving scheme (EPSS) to prolong the lifetime of the MH battery by avoiding those unnecessary and uncertain waiting time for available bandwidth
Summary
The fourth generation (4G) personal communication networks provide telecommunication and data access together for nomadic users by integrating telephone and computer networks into a single system [1,2]. According to the guideline of related 4G standards [5,6], NRT-VBR service does not have the high priority to acquire the system resource (e.g., bandwidth) for transmission [7]. Because PSM uses the method that an MH turns off its radio transceiver in idle time to conserve its energy, too much waiting time will decrease the efficiency of PSM Those mentioned PSMs, do not consider a problem that MHs may not obtain the downlink bandwidth and waste their energy due to traffic congestion. We present an MH PSM named extra power saving scheme (EPSS) to prolong the lifetime of the MH battery by avoiding those unnecessary and uncertain waiting time for available bandwidth.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
