WLC17-5: Improving Mobile Station Energy Efficiency in IEEE 802.16e WMAN by Burst Scheduling

2006 ◽  
Author(s):  
Jinglin Shi ◽  
Gengfa Fang ◽  
Yi Sun ◽  
Jihua Zhou ◽  
Zhongcheng Li ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Mobile Station ◽  
Ieee 802.16E ◽  
Burst Scheduling

scholarly journals Improving Energy Efficiency of Cooperative Femtocell Networks via Base Station Switching Off

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Woongsup Lee ◽  
Bang Chul Jung
Keyword(s):  
Energy Efficiency ◽  
Mobile Station ◽  
Base Station ◽  
Cooperative Transmission ◽  
Base Stations ◽  
Femtocell Networks ◽  
Coordinated Multipoint ◽  
Performance Metric ◽  
Bs Switching ◽  
Optimal Set

Recently, energy efficiency (EE) of cellular networks has become an important performance metric, and several techniques have been proposed to increase the EE. Among them, turning off base stations (BSs) when not needed is considered as one of the most powerful techniques due to its simple operation and effectiveness. Herein, we propose a novel BS switching-off technique for cooperative femtocell networks where multiple femtocell BSs (FBSs) simultaneously send packets to the same mobile station (MS). Unlike conventional schemes, cooperative operation of FBSs, also known as coordinated multipoint (CoMP) transmission, is considered to determine which BSs are turned off in the proposed technique. We first formulate the optimization problem to find the optimal set of FBSs to be turned off. Then, we propose a suboptimal scheme operating in a distributed manner in order to reduce the computational complexity of the optimal scheme. The suboptimal scheme is based on throughput ratio (TR) which specifies the importance of a particular FBS for the cooperative transmission. Through simulations, we show that the energy consumption can be greatly reduced with the proposed technique, compared with conventional schemes. Moreover, we show that the suboptimal scheme also achieves the near-optimal performance even without the excessive computations.

scholarly journals Memory reduction methods for IEEE 802.16e mobile station

2011 ◽  
Vol 8 (3) ◽  
pp. 129-135
Author(s):  
Seung-yerl Lee ◽  
Dong-sun Kim ◽  
Kyu-yeul Wang ◽  
Duck-jin Chung
Keyword(s):  
Mobile Station ◽  
Ieee 802.16E ◽  
Reduction Methods ◽  
Memory Reduction

scholarly journals Concurrent Scanning for High Quality Hand Over Support in Mobile WiMAX Networks

2013 ◽  
Vol 10 (2) ◽  
pp. 1302-1316 ◽  
Author(s):  
Prabhu Reddy ◽  
Arathi R Shankar ◽  
V.sambasiva Rao
Keyword(s):  
Real Time ◽  
Mobile Station ◽  
Base Stations ◽  
Movement Direction ◽  
Mobile Wimax ◽  
Ieee 802.16E ◽  
High Quality ◽  
Best Effort ◽  
Scanning Process ◽  
Real Time Application

Mobile WiMAX is IEEE 802.16e standard established for mobile broadband wireless access (BWA). Mobility in WiMAX system is an important issue when the mobile station (MS) moves and be handover between base stations (BSs). This issue causes an unnecessary neighboring BS scanning and association, handover delay, and MAC overhead which may affect real-time applications. The MS movement direction prediction (MMDP) based MS scanning is used to reduce the number of scanning’s required in mobile WiMAX handover process. In this paper with reduction in number of scanning’s we propose to reduce the scanning delay required for evaluated two best target BSs by using concurrent scanning process. Network issues like ideal sectors in WiMAX 2 (IEEE 802.16m), network congestion and fast change in RSS are important parameters which can affect the QoS. With this proposed model we are able to provide the high quality hand over support in mobile WiMAX wherein we are able to solve the above stated network problems. Here on using the concurrent scanning process the authors are able to reduce the scanning delay by 40%. As a part of this paper, network layer parameters called routing protocols are analyzed for hand over support. This analysis shows an efficient routing protocol for real time application and the best effort service. This reviles that fisheye protocol is better to use for smaller network and LANMAR for the larger networks in real time application and IERP protocol is good for best effort services.

scholarly journals ANALISIS PENGARUH PERGERAKAN USER TERHADAP KUALITAS SINYAL SUARA PADA JARINGAN WIMAX IEEE 802.16

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Aris Hartaman ◽  
Uke Kurniawan Usman ◽  
Budi Prasetya
Keyword(s):  
Mobile Station ◽  
Multipath Fading ◽  
Ieee 802.16 ◽  
Wireless Access ◽  
Doppler Spread ◽  
Line Of Sight ◽  
Ieee 802.16E ◽  
Mobile Wireless ◽  
Broadband Wireless ◽  
Non Line Of Sight

WiMAX IEEE 802.16e merupakan non-line of sight (NLOS) Broadband Wireless Access (BWA) yang dikeluarkan oleh WiMAX Forum yang dikembangkan berdasarkan standar IEEE 802.16. Teknologi ini mampu diimplementasikan untuk mobile wireless access yang dapat memenuhi kebutuhan layanan data dengan bandwidth yang cukup besar 20 MHz, coverage yang luas 50 km, dengan bitrate yang tinggi 75 Mbps. Pergerakan user/mobile station akan mempengaruhi kualitas layanan suara pada jaringan WiMAX IEEE 802.16e yaitu akan terjadinya efek doppler spread yang mengakibatkan perubahan frekuensi terhadap mobile station yang bergerak. Penelitian mengenai pengaruh pergerakan user/mobile station terhadap kualitas sinyal suara pada jaringan WiMAX IEEE 802.16e ini dilakukan dengan cara membuat simulasi sistem transmisi WiMAX 802.16e yang dilewatkan pada kanal yang bersifat multipath fading karena bersifat komunikasi non-line of Sight (NLOS) dengan cara terdistribusi rayleigh dan noise AWGN dengan pemodelan kanal propagasi SUI (Stanford University Interim). Parameter kecepatan user/mobile station yang disimulasikan mulai 0 km/jam (user statis), <15km/jam (user berjalan kaki), 16-50 km/jam (user berkendaraan sedang), sampai dengan 51-120 km/jam (user kecepatan tinggi). Hasil simulasi dan analisa memperlihatkan bahwa kecepatan pergerakan user sangat berpengaruh terhadap fluktuasi fading pada kanal rayleigh. Berdasarkan standar komunikasi digital yaitu nilai BER sebesar 10, nilai Eb/No yang dihasilkan dibawah 12 dB untuk modulasi BPSK kecepatan user bisa mencapai 50 km/jam, sementara untuk QPSK kecepatan maksimal user dibawah 50 km/jam, dan 8PSK kecepatan user dibawah 30 km/jam. Sehingga modulasi yang paling baik untuk system ini adalah BPSK.

Energy-Efficient Resource Allocation in CoMP Systems with Backhaul Capacity Constraints

2014 ◽  
Vol 716-717 ◽  
pp. 1312-1317
Author(s):  
Qi Wen Wan ◽  
Xiang Ming Wen ◽  
Zhao Ming Lu ◽  
Hai Jun Zhang ◽  
Jun Zhao
Keyword(s):  
Resource Allocation ◽  
Energy Efficiency ◽  
Energy Efficient ◽  
Scheduling Algorithm ◽  
Mobile Station ◽  
Capacity Constraints ◽  
Base Stations ◽  
Coordinated Multipoint ◽  
Efficient Resource ◽  
Energy Efficient Resource Allocation

Energy efficient resource allocation is one of the critical issues for the coordinated multipoint (CoMP) transmission system, where the signal received by each mobile station needs to be converged among multiple base stations (BSs) in the same cluster. However, as the interaction of the system is frequent, the overhead of the backhaul signaling will be enormous. In this paper, an iterative resource allocation and scheduling algorithm (IRASA) with dual method is proposed to solve the optimization problem aiming to maximize the system energy efficiency, which considers the backhaul capacity constraints, circuit power consumption and zero forcing pre-coding (ZFP). Simulation results show that our proposed IRASA can significantly improve the energy efficiency of the system with the backhaul capacity constraints.

scholarly journals Energy Cycle Optimization of Mobile Phones Using A Sleep Cycle Optimization Algorithm

2019 ◽  
Vol 9 (4) ◽  
pp. 4389-4391
Author(s):  
S. Murawwat ◽  
I. Manzoor ◽  
H. Akash ◽  
J. Ahmed
Keyword(s):  
Energy Consumption ◽  
Mobile Phones ◽  
Mobile Station ◽  
Mobile Network ◽  
Base Station ◽  
The Other ◽  
Sleep Cycle ◽  
Sleep Mode ◽  
Ieee 802.16E ◽  
T Distribution

Researchers and mobile network operators are dealing with the steep rise in energy consumption of mobile phones. A massive amount of phones are available in the market which are updating services from time to time. The problem lies in their battery drainage in response to the usage of internet-based applications including online streaming, multimedia requests, social networking usage and many more. In this research, a new technique is proposed and evaluated for energy optimization in mobile phones by exploiting the listening cycle of the mobile station (MS) wake-up mode while connected to the base station (BS) that is connected to a mobile network based on IEEE 802.16e. An MS cannot communicate with the BS if it is in the sleep mode while the other is in the wake-up mode. Service time and sojourn time are assumed to be exponential and based on t-distribution. The confidence interval comes up to 95% for our technique. The relative error is computed between the earlier techniques available and the approximated proposed one. Results show that there is a considerable improvement in energy consumption as compared to the other available techniques.

Type II Sleep Mode Operation for IEEE 802.16e Based WiMAX

2011 ◽  
Vol 128-129 ◽  
pp. 343-349
Author(s):  
Jian Bin Xue ◽  
Song Bai Li ◽  
Ting Zhang ◽  
Wen Hua Wang
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Markov Chain Model ◽  
Broad Band ◽  
Traffic Load ◽  
Sleep Mode ◽  
Chain Model ◽  
Ieee 802.16E ◽  
Mode Operation ◽  
Set Up

To overcome the flaw of energy efficiency drop in broad band wireless communication with the short time sleep, the energy-saving mechanism of the sleep mode operation was researched in IEEE 802.16e. In this paper we propose a dynamic algorithm to tune the ratio of the sleep windows and receive windows according to the traffic load. Then, a Markov chain model was set up to analyze the energy efficiency and mean access delay. NS2 simulation results show that the proposed algorithm can achieve marked gain in energy efficiency compared to the traditional energy saving mechanism.

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