Completed Research Projects

1. Airborne IoT Network (AIN) for Rural Water Quality Monitoring

Project is funded by 'Research University Grant', Universiti Kebangsaan Malaysia

Duration: 1.5 years (2018-2020)

Description: This project aims to establish a reliable LoS for data transmission via high altitude wireless M2M platform, known as Airborne IoT Network (AIN). This project consists of; high altitude platform, wireless M2M network, sensors technologies and big data analytic enablement platform. The use of high altitude object and narrowband spectrum for M2M communications will allow better coverage due to good propagation characteristic at lower frequency band as well as the elevated platform and thus, provide reliable wireless communications link.

2. Reconfigurable Base Station for Next Generation Wireless Network

Project is under grant 'Dana Inovasi', sponsored by Universiti Kebangsaan Malaysia

Duration: 1.5 year (2017-2019)

Description: The main aim of the project is to implement a small-scale base station, which can be reconfigured as the research and industrial linkages progress. The base station will be tested in a campus environment to represent future Internet of Things (IoT) applications for the students and researchers residing on a campus, such as multiple online video lecture streaming, online examinations, and other connected things or Machine-to-Machine application, such as temperature regulators, security alarm and lab automation. The project is extendable to cater for higher layer applications (or apps) to represent smart campus lifestyle, as well as adding more ‘modules’ or functionalities to cater for different NGN requirements

3. Pilot Contamination and its Effect Towards Massive-MIMO Capacity in Fifth Generation (5G) Wireless Transmission

Project is under grant 'Fundamental Research Grant Scheme (FRGS)', sponsored by Malaysia's Ministry of Higher Education

Duration: two years (2015-2017)

Description: Further study reveals that Massive-MIMO downlink transmissions are limited by the effect known as 'pilot contamination' during channel estimation. This is because the Massive-MIMO downlink from each of the neighbouring base stations deals with beamforming at the same spatial & frequency resources, thus cause the effect known as multi-cell interference. This will cause an error to estimate the channel condition at each base station, which largely occur due to large-scale of antennas, thus limit the implementation of large number of antenna arrays, i.e. higher order Massive-MIMO. This project aims to solve the pilot contamination effect by proposing a novel avoidance technique using temporal-based and location-aware technique at the Massive-MIMO base stations.

Related Publications:

  1. M. Hasbullah Mazlan, Mehran Behjati, Rosdiadee Nordin, Mahamod Ismail, "Wiener-based Smoother and Predictor for Massive-MIMO Downlink System under Pilot Contamination", Telecommunication Systems, 67(3): 387–399, March 2018 [Full Paper]

  2. Mohammad Hasbullah Mazlan, Ehab Ali, Rosdiadee Nordin, Mahamod Ismail, "Coordinated Wiener Predictor for Channel Estimation in Massive-MIMO System", 2017 IEEE 13th Malaysia International Conference on Communications (MICC 2017) [Full Paper]

  3. Mohammad Hasbullah Mazlan, Mehran Behjati, Rosdiadee Nordin, Mahamod Ismail, "Investigation of Pilot Training Effect in Massive-MIMO TDD System", 2015 IEEE 12th Malaysia International Conference on Communications (MICC 2015), pp. 230-235 [Full Paper]

4. Minimizing Feedback Overhead in the Uplink of Fifth Generation (5G) Cellular Networks for Practical Implementation of Massive-MIMO System

Project is funded by Science Fund, sponsored by Malaysia's Ministry of Science, Technology and Innovation

Duration: two years (2015-2017)

Description: It has recently been shown that feedback overhead is the main limiting factor to increase the number of transmit antennas in Massive-MIMO implementation. The problem motivates the development of the temporal channel predictor to reduce the CSI feedback. The predictor will be able to track the previous characteristics of the Massive MIMO wireless sub-channels and predict the CSI for the next frame ahead of downlink transmission. Therefore, instead of feeding back the explicit CSI, which consumes a large number of feedback bits, only a few bits can be fed back to the BS for prediction rule correction.

Related Publications:

  1. Mehran Behjati, Mahamod Ismail and Rosdiadee Nordin, "Limited Feedback MU-MIMO in LTE-A System: Concepts, Performance, and Future Works", Wireless Personal Communications, 2015, 84(2): 935-957 [ Full Paper ]


5. Energy Efficient Wireless Sensor Network for Monitoring of Physiological and Biomechanical Parameters in High Performance Cycling

Project is funded by Innovation Grant, sponsored by Universiti Kebangsaan Malaysia (Center for Collaborative Innovation)

Duration: one year (2015-2016)

Description: In this project, we will design and develop a wireless sensor network prototype, to measure related cycling parameters cyclist and triaxial acceleration from the bicycle respectively. These parameters can be transmitted wirelessly to the coaching team in real time based on the latest wireless protocols, such as BLPE (v4.0) or existing proprietary ANT+. These parameters will be sent to the coach side via a novel wireless transmission technique, which consider the trade-off between energy efficiency and telecommunication distance between the cyclists and coach via nature inspired optimization algorithm.

Related Publications:

  1. Sadik Kamel Gharghan, Rosdiadee Nordin, Aqeel Mahmood Jawad, Haider Mahmood Jawad, and Mahamod Ismail, "Adaptive Neural Fuzzy Inference System for Accurate Localization of Wireless Sensor Network in Outdoor and Indoor Cycling Applications", IEEE Access, Vol. 6: 38475 - 38489, 2018 [Full Paper]

  2. Sadik Gharghan, Rosdiadee Nordin, Mahamod Ismail, "Energy Efficiency of Ultra-Low-Power Bicycle Wireless Sensor Networks Based on a Combination of Power Reduction Techniques", Journal of Sensors, 2016 [Full Paper]

  3. Sadik Gharghan, Rosdiadee Nordin, Mahamod Ismail, "A Wireless Sensor Network with Soft Computing Localization Techniques for Track Cycling Applications", Sensors, 16(8): 1-23 [Full Paper]

  4. Sadik Kamel Gharghan, Rosdiadee Nordin, Mahamod Ismail, "Accurate Wireless Sensor Localization Technique based on Hybrid PSO-ANN Algorithm for Indoor and Outdoor Track Cycling", IEEE Sensors Journal, 16(2): 529-541 [ Full Paper ]

  5. Sadik Gharghan, Rosdiadee Nordin, Mahamod Ismail, "Statistical Validation on Performance of ZigBee-based Wireless Sensor Network for Track Cycling Monitoring Prototype", 2015 International Conference on Smart Sensors and Application (ICSSA), pp. 44-49, May 2015 [ Full Paper ]

6. Heterogeneous Coexistence in TV White Space (TVWS) Using Time Series Financial Predictive Model for Rural Broadband Wireless Network

Project is under grant 'Exploratory Research Grant Scheme (ERGS)', sponsored by Malaysia's Ministry of Higher Education

Duration: three years (2013-2016)

Description: The research objective is to use a financial predictive tool known as Grey model to predict the availability of idle radio channel and use fuzzy logic to allocate radio resources based on network priorities. Our proposition is that; in every chaotic system like the presence/absence of primary users in TV spectrum, there exists a regular pattern. Therefore, if we can predict with a high degree of accuracy TV spectrum occupancy using predictive algorithm, then, fair radio resource allocation is implemented. The expected project outcome is a novel approach that incorporates artificial intelligence in spectrum management for heterogeneous networks co-existence.

Related Publications:

  1. Anabi Hilary Kelechi, Rosdiadee Nordin, Mahamod Ismail, "Spectrum Sharing Etiquette considering Primary User Activity Pattern in Dynamic TVWS via Cournot Game Theory", Wireless Personal Communications, 91(1): 463-485 [Full Paper]

  2. Anabi Hilary Kelechi, Rosdiadee Nordin, "Two Stage QoS-Aware Coexistence Framework for TVWS", Journal of Theoretical and Applied Information Technology (JATIT), 81(3): 466-473 [Full Paper]

  3. Omar B. Abdulghafoor, Mahamod Ismail, Rosdiadee Nordin and Musbah M. R. Shaat, "Fast and Distributed Power Control Algorithm in Underlay Cognitive Radio Networks", Journal of Communications, Vol. 9(8): pp. 634-643, 2014 [ Abstract ]

  4. Omar B.Abdul-Ghafoor, Mahamod Ismail, Rosdiadee Nordin, Ayman Abd El-Saleh, "Resource Allocation in Spectrum Sharing ad-hoc Cognitive Radio Networks Based on Game Theory: An Overview", KSII Transactions on Internet and Information Systems, Dec. 2013, 7(12):2957-2986 [ Full Paper ]

  5. Razimah Abdul Rahim, Rosdiadee Nordin, Mahamod Ismail, "Investigation of Channel Bonding Based on TV White Space Spectrum Occupancy for Urban Areas in Malaysia", 2nd International Conference of Information and Communication Technology (ICoICT 2014), pp. 100-105, May 2014 [ Abstract ]

  6. Anabi Hilary Kelechi, Rosdiadee Nordin, "Investigation of Mobility Supports for Smart-Secured-Seamless (SSS) Public Transportation in Kuala-Lumpur Based on TV White Space", 2014 IEEE 2nd International Symposium on Telecommunication Technologies (ISTT2014) - Special Track 2: Smart Grid and Utility Communication, pp. 423-428, Nov. 2014 [ Full Paper ]

  7. Anabi Hilary Kelechi, Rosdiadee Nordin, "Non Cooperative Cournot Economic Game Model for Heterogeneous Coexistence in TVWS", 2014 IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob 2014), pp.328-334, Aug. 2014 [ Abstract ]

  8. Omar B. Abdulghafoor, Mahamod Ismail, Rosdiadee Nordin, "Application of Game Theory to Underlay Ad-Hoc Cognitive Radio Networks: An Overview", 2013 IEEE International Conference on Space Science and Communication (IconSpace 2013), Malacca, 1 – 3 July 2013 [ Abstract ]


7. WiFi with Wireless Sensor-Aided Hybrid Indoor Positioning System (HyIPS) for Accurate Location Estimation in a Smart Home Environment

Project is funded by 'Research University Grant', sponsored by UKM

Description:

Pattern matching algorithms can be classified as deterministic (non-linear) and probabilistic (statistical). We will use deterministic approach by considering Artificial Neural Networks (ANNs) algorithm due to its powerful learning and adaptive capabilities. We will implement our Hybrid (WiFi-based fingerprinting and WSN) indoor position system (HyIPS) in ANN with back-propagation architecture. We will implement the concept of cloud based server architecture for storing position data information. Genetic Algorithm concept will be implemented for optimization of ANN model. Performance of the proposed system is evaluated by means of simulations in a smart home environment. The joint use of heterogeneous wireless technologies can increase the robustness and the accuracy of the indoor positioning systems


8. Green Wireless Network with Spatial and Frequency Resource Optimization Strategies for Telecommunication Networks in Malaysia, 2013-2016

Project is under grant 'Economic Transformation Plan (ETP)', sponsored by UKM

Distribution of energy consumption at a macrobasestation site [reference]

Description:

This research attempts to exploit the wireless network traffic load to reduce the downlink energyconsumption by reducing the number and size of active macro-cells according to traffic loadconditions. In addition, developing an integration between cells switch-off approach (spatialdiversity), and renewable resource energy (solar). The research will also consider exploiting thedynamic traffic load conditions to improve the downlink energy consumption by achieving optimalbalancing between the number of subcarriers and dynamic traffic load conditions. Particle Swarm Optimization (PSO) has been adopted to optimize the subcarriers under the condition of maximum traffic load while guaranteeing the QOS under the constraint of minimal power per subcarrier.

Related Journal Publications:

  1. Mohammed H. Alsharif, Rosdiadee Nordin, Mahamod Ismail, "Intelligent Cooperation Management among Solar Powered Base Stations towards a Green Cellular Network in a Country with an Equatorial Climate", Telecommunication Systems, ISI [ In Press ]

  2. Mohammed H. Alsharif, Rosdiadee Nordin, Mahamod Ismail, "Green Wireless Network Optimisation Strategies within Smart Grid Environments for Long Term Evolution (LTE) Cellular Networks in Malaysia", Renewable Energy, 85(2016): 157-170, ISI (Q1) [ Full Paper ]

  3. Mohammed H. Alsharif, Rosdiadee Nordin, Mahamod Ismail, "Exploiting Coexistence between UMTS and LTE for Greener Cellular Networks with Particle Swarm Optimization", Wireless Personal Communications, 85(3): 623-639, ISI [ Full Paper ]

  4. Mohammed H. Alsharif, Rosdiadee Nordin and Mahamod Ismail, "Energy Optimisation of Hybrid Off-Grid System for Remote Telecommunication Base Station Deployment in Malaysia", EURASIP Journal on Wireless Communications and Networking, Special Issue: Energy Harvesting Wireless Communications, 2015, 2015:64, ISI [ Full Paper ]

  5. Mohammed H. Alsharif, Rosdiadee Nordin, Mahamod Ismail, "Corporation Management among Base Stations Based on Cells Switch-off for a Green LTE Cellular Network", Wireless Personal Communications, 81(1): 303-318, 2015, ISI [ Full Paper ]

  6. Mehran Behjati, Mohammed H. Alsharif, Rosdiadee Nordin and Mahamod Ismail, "Energy Efficient and High Capacity Tradeoff in Distributed Antenna System for a Green Cellular Network", Journal of Computer Networks and Communications, 2015, pp 1-10 [ Full Paper ]

  7. Mohammed H. Alsharif, Rosdiadee Nordin, and Mahamod Ismail, "A Review on Intelligent Base Stations Cooperation Management Techniques for Greener LTE Cellular Networks", Journal of Communication, Vol. 9(12): 937-945, 2014, Scopus [ Full Paper ]

  8. Mohammed H. Alsharif, Rosdiadee Nordin, Mahamod Ismail, "Classification, Recent Advances and Research Challenges in Energy Efficient Cellular Networks", Wireless Personal Communications, July 2014, 77(2): 1249-1269, ISI [ Full Paper ]

  9. Mohammed Alsharif, Rosdiadee Nordin and Mahamod Ismail, "Survey of Green Radio Communications Networks: Techniques and Recent Advances", Journal of Computer Networks and Communications, Dec. 2013, 2013(4):1-13, Scopus [ Full Paper ]

Related Conference Publications:

  1. Mehran Behjati, Rosdiadee Nordin, Mahamod Ismail, "Compensation of EE Degradation Due to Antenna-Muting in DAS for a Green Cellular Network", 2015 IEEE 11th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob 2015), pp. 336-340 [Full Paper]

  2. Mohammed H. Alsharif, Rosdiadee Nordin, Mahamod Ismail, "Optimization of Hybrid Renewable Energy Power System for Urban LTE Base Station Deployment in Malaysia", 2014 IEEE 2nd International Symposium on Telecommunication Technologies (ISTT2014), pp.1-5, Nov. 2014 [ Full Paper ]

  3. Mohammed Alsharif, Rosdiadee Nordin, Mahamod Ismail, "Energy-Efficient Subcarrier Optimization Scheme based on Particle Swarm for Green Radio Wireless Networks", 2013 IEEE 11th Malaysia International Conference on Communication (MICC 2013), pp. 29-33 [ Abstract ]


9. Wireless Bicycle Sensor for On-Road Athlete Performance Monitoring, 2013-2015

Sponsored by Malaysia's Ministry of Higher Education, part of the 'Road to Rio 2016' road map for Malaysia's National Bicycle Team

Description:Currently, there is no reliable performance monitoring system for Malaysia’s national cycling team based in Bukit Jalil Sports Complex. SRAM and Heart Rate Monitor (HRM) methods offer accurate and reliable data for the athlete, however involves off the track analysis, which is a very time-consuming task for the coach and athlete. A mobile and accurate performance monitoring system is highly desired to address the current problem in the exercise method of Malaysia’s national cycling team. This research will form collaboration partner with Malaysia Sports Council (MSC). This research aims to investigate the current problems in performance monitoring of the national cycling team and proposes a real-time wireless sensor network to address these shortcomings. The junior cyclist team and the current bicycle equipment will be used as the samples for this research

Related Journal Publications:

  1. Sadik Kamel Gharghan, Rosdiadee Nordin, Mahamod Ismail, "An Ultra-Low Power Wireless Sensor Network for Bicycle Torque Performance Measurements", Sensors, 2015, 15(5): 11741-11768 [ Full Paper ]

  2. Sadik Gharghan, Rosdiadee Nordin and Mahamod Ismail, "A Survey on Energy Efficient Wireless Sensor Networks for Bicycle Performance Monitoring Application", Journal of Sensors, 2014 [ Abstract ]

  3. Sadik Kamel Gharghan, Rosdiadee Nordin, Mahamod Ismail, "Energy-Efficient ZigBee-based Wireless Sensor Network for Track Bicycle Performance Monitoring", Sensors, 2014; 14(8):15573-15592 [ Full Paper ]

Related Conference Publications:

  1. Sadik Gharghan, Rosdiadee Nordin, Mahamod Ismail, "Design Consideration of an Energy Efficient Wireless Sensor Network for High Performance Track Cycling", International Conference on Information Science & Applications (ICISA 2014) [ Abstract ]

  2. Sadik Gharghan, Rosdiadee Nordin, Mahamod Ismail, "Empirical Investigation of Pedal Power Calculation Techniques for Track Cycling Performance Measurement", 2013 IEEE Student Conference on Research and Development (SCOReD 2013), pp. 48-53 [ Abstract ]


10. Ensemble Mobile Platform and Security Tools for Innovative Digital Economy Environment (Sub-Project: Resource Management), 2011-2015

Part of the project under LRGS (Long-Term Research Grant Scheme) Top-Down, sponsored by Malaysia's Ministry of Higher Education.

Description: This project involves with researching and developing a new platform based on a new cutting edge technology that includes: a light-weight operating system that will provide the virtual environment; communication interface and protocols; middlewares and application layer interface. This project also studies new security and digital forensic algorithms and techniques required for performing vulnerability analysis, forensic analysis for audit and trust purposes, and security assessment in the proposed environment. In the proposed advanced computing environment, various computing devices using single or multiple interfaces and technology/standard need to communicate and cooperate efficiently with a certain level of security. These computing devices may be supported by different type of operating system with different features and level of security support. In order to ensure that all operations within the environment can be carried out seamlessly in ad hoc manner, there is a need for a common platform to be developed. The purpose of this project is to investigate and implement a new functional layered model of the common mobile platform with secured and trusted ensemble computing environment for Innovative Digital Economy Environment. This mobile platform includes a light-weight operating system for the environment that will provide the virtual environment, communication interface and protocols, and middleware for providing basic functionalities as well as to provide security, privacy and trusted environment. An Application Layer Interface will also be provided for the application developers. A resource and network management will be responsible for coordinating and managing the resources of the computing device efficiently and resiliently. Furthermore, new security, trustworthy and forensic algorithms and techniques will be developed with the aim for optimum protection. This can be achieved by developing a security tools which has capability to perform protection and prevention, vulnerability analysis, forensic analysis and security assessment in targeted applications.

Related Journal Publications:

  1. Waheb A. Jabbar, Mahamod Ismail, Rosdiadee Nordin, "Multi-criteria based multipath OLSR for battery and queue-aware routing in multi-hop ad hoc wireless networks", Wireless Networks, 21(4): 1309-1326, May 2015 [ Full Paper ]

  2. Ahmed Al-Haiqi, Mahamod Ismail and Rosdiadee Nordin, "A New Sensors-Based Covert Channel on Android", The Scientific World Journal, 2014 [ Abstract ]

  3. Waheb A. Jabbar, Mahamod Ismail, Rosdiadee Nordin, "Performance Evaluation of MBA-OLSR Routing Protocol for MANETs", Journal of Computer Networks and Communications, Vol. 2014 [ Full Paper ]

  4. Ahmed Patel, Rosdiadee Nordin, Ahmed Al-Haiqi, "Beyond ubiquitous computing: The Malaysian HoneyBee project for Innovative Digital Economy", Computer Standards & Interfaces, Sept. 2014, 36(5): 844-854 [ Abstract ]

  5. Waheb A. Jabbar, Mahamod Ismail, Rosdiadee Nordin, "On The Performance of The Current MANET Routing Protocols for VoIP, HTTP, and FTP Applications", Journal of Computer Networks and Communications, Vol. 2014 [ Abstract ]

  6. Ahmed Al-Haiqi, Mahamod Ismail & Rosdiadee Nordin, "Keystrokes Inference Attack on Android: A Comparative Evaluation of Sensors and Their Fusion", ITB Journal of ICT Research and Applications, 2013, 7(2): 117- 136 [ Abstract ]

Related Conference Publications:

  1. Waheb A. Jabbar, Mahamod Ismail, and Rosdiadee Nordin, "MBA-OLSR: A Multipath Battery Aware Routing Protocol for MANETs", 2014 5th International Conference on Intelligent Systems Modelling & Simulation (ISMS2014) [ Presented ]

  2. Ahmed Al-Haiqi, Mahamod Ismail, Rosdiadee Nordin, "The Eye as a New Side Channel Threat on Smartphones", 2013 IEEE Student Conference on Research and Development (SCOReD 2013), pp. 475-479 [ Abstract ]

  3. Waheb A. Jabbar, Mahamod Ismail, Rosdiadee Nordin, "Evaluation of Energy Consumption in Multipath OLSR Routing in Smart City Applications", 2013 IEEE 11th Malaysia International Conference on Communication (MICC 2013), pp. 401-406 [ Abstract ]

  4. Waheb A. Jabbar, M. Ismail and R. Nordin, “Framework for Enhancing P2P Communication Protocol on Mobile Platform” International Conference on Informatics & Applications 2012 (ICIA 2012), June 2012


11. Development of Wireless Localization Network for In-Building Network Application, 2012-2014

Project is under grant Science Fund, sponsored by Malaysia's Ministry of Science, Technology and Innovation

Description:

The need for location information to capture contexts and configure them into the computing and communication processes, coupled with the unavailability of global positioning system (GPS) in indoor environment, has triggered increased research interest in indoor localization. Using GPS for indoor localization presents some significant challenges. For the problem of indoor localization, a variety of other sensors have been used, such as vision, infrared (IR) and laser range finders. The main challenge in localization in wireless indoor environment is to predict the received signal strength (RSS). Radio frequency (RF) signal strength measured indoors is nonlinear with distance. In addition, it has non-Gaussian noise, resulting from multipath effects and environmental effects, such as building geometry, network traffic, presence of people and atmospheric conditions.

Related Publications:

  1. Lee Chin Vui, Rosdiadee Nordin, “Lateration Technique for Wireless Indoor Positioning in Single-Storey and Multi-Storey Scenarios”, Journal of Theoretical and Applied Information Technology (JATIT), 68(3): 670-675, 2014 [ Full Paper ]

  2. Siti Zakiah Hasan, Rosdiadee Nordin, "Design Considerations for Clustering Localization Technique In An Indoor Wireless Network", Journal Of Theoretical And Applied Information Technology (JATIT), Dec. 2013, 57(3): 205-210 [ Full Paper ]

  3. Keeratpal Singh, Mahamod Ismail, Rosdiadee Nordin, Zahid Farid, "Positioning Technique Using One Hearable Umts Cell To Predict Road Users", Journal Of Theoretical And Applied Information Technology (JATIT), Nov. 2013, 57(2): 149-152 [ Full Paper ]

  4. Mohd Nazrul Hanif Nordin, Rosdiadee Nordin, "Wireless Indoor MIMO Channel Propagation Prediction based on a 3-D Ray Tracing Technique", Journal Of Theoretical And Applied Information Technology (JATIT), Nov. 2013, 57(1): 54-60 [ Full Paper ]

  5. Zahid Farid, Rosdiadee Nordin, Mahamod Ismail, "Recent Advances in Wireless Indoor Localization Techniques and System", Journal of Computer Networks and Communications, 2013 [ Abstract ]

  6. Zahid Farid, Rosdiadee Nordin, Wan Muhamad Anas Wan Daud, Siti Zakiah Hasan, "Leveraging Existing WLAN Infrastructure for Wireless Indoor Positioning based on Fingerprinting and Clustering Technique", International Conference on Electronics, Information and Communication 2014 (ICEIC 2014), pp. 1-4, Jan 2014 [ Abstract ]

  7. M. Ismail, F. Alawe, W. Al-alimi, R. Nordin, and S. Bohanudin, "Hybrid Location Determination Techniques in Heterogeneous Network”, International Conference on Computer & Communication Engineering (ICCCE 2012), July, 2012 [ Abstract ]

12. Semi Soft Handover using Carrier Aggregation In LTE- Advanced System, 2012-2014

Project is under grant 'Dana Rangsangan UKM', sponsored by UKM

Description: Carrier Aggregation (CA) technique is one of the significant features for future LTE-A. It is expected that CA technique can provide substantial enhancement in transmission data rate for downlink and uplink over wider bandwidth. Also, CA is expected to enhance handover performance from the source to the targeted eNodeBs and reducing outage probability for the mobile devices, i.e. User Equipment (UEs). The basic of CA technique is to aggregate several smaller continuous or non-continuous carrier components to increase the data rate over wider bandwidth The objective of this research is to identify the limitation of existing LTE handover technique for future LTE–Advanced network. Then, to investigate the impact of CA technique towards the handover performance and compared with conventional hard and soft handover without CA in term of latency and outage probability by considering the interference between component carrier. At a time, the challenges and trade-off between continuous component carrier’s aggregation interferences and the outage probability at the boundary of cells will be addressed and solved.

Related Publications:

  1. Ahmed A Ali, Rosdiadee Nordin and Mahamod Ismail, "Fair Joint User Scheduling Based on Best CQI for Carrier Aggregation in LTE-Advanced", Journal of Theoretical and Applied Information Technology (JATIT), 80(1): 184-190 [ Full Paper ]

  2. Ibraheem Shayea, Mahamod Ismail, Rosdiadee Nordin and Hafizal Mohamad, "Multi- Influence Factors for Adaptive Handover Decision Algorithm through Carrier Aggregation Implementation in LTE-Advanced System," Journal of Computer Networks and Communications [ Full Paper ]

  3. Ibraheem Shayea, Mahamod Ismail Rosdiadee Nordin, Hafizal Mohamad, "Performance Analysis of Multi-Carrier Aggregation with Adaptive Modulation and Coding Scheme ln LTE-Advanced System", Journal of Theoretical and Applied Information Technology (JATIT), 67(2): 384-396, 2014 [ Full Paper ]

  4. Ibraheem Shayea, Mahamod Ismail, Rosdiadee Nordin and Hafizal Mohamad, "Handover Performance over a Coordinated Contiguous Carrier Aggregation Deployment Scenario in the LTE-Advanced System", International Journal of Vehicular Technology [ Full Paper ]

  5. Ahmed A Ali, Rosdiadee Nordin, Mahamod Ismail, Huda Abdullah, "Impact of Feedback Channel Delay over Joint User Scheduling Scheme (JUS) and Separated Random User Scheduling Scheme (SRUS) in LTE-A System With Carrier Aggregation", Journal of Computer Networks and Communications, 2014 [ Full Paper ]

  6. Ahmed A Ali, Rosdiadee Nordin, Huda Abdullah, "Performance of Separated Random User Scheduling (SRUS) and Joint User Scheduling (JUS) in the Long - Term Evolution - Advanced", Journal of Theoretical and Applied Information Technology (JATIT), Jan. 2014, 59(1): 1-9 [ Full Paper ]

  7. Ibraheem Shayea, Mahamod Ismail and Rosdiadee Nordin, "Downlink Spectral Efficiency Evaluation with Carrier Aggregation in an LTE-Advanced System Employing Adaptive Modulation and Coding Schemes", 2013 IEEE 11th Malaysia International Conference on Communication (MICC 2013)

  8. I. Shayea, M. Ismail, R. Nordin, "Advanced Handover Techniques in LTE- Advanced system", International Conference on Computer and Communication Engineering (ICCCE 2012), 3-5 July 2012, Kuala Lumpur, Malaysia

  9. I. Shayea, M. Ismail, R. Nordin, "Capacity Evaluation of Carrier Agreggation Techniques in LTE-Advanced System", International Conference on Computer and Communication Engineering (ICCCE 2012), 3-5 July 2012, Kuala Lumpur, Malaysia

13. Adaptive Spatial Multilpexing Downlink Transmission Scheme in An Interference Limited Channel Environment, 2011-2014

Project is under grant 'Geran Galakkan Pensyarah Muda (GGPM), sponsored by UKM

Description:

Multiple-Input Multiple-Output (MIMO) becomes a leading technology for future wireless network transmission. MIMO benefit from the wireless characteristics, such as channel fading and noise to exploit the multiuser diversity by transmitting the signals from the multiple antennas at both the receiver and transmitter. This results in multiplicative increase in system throughput. MIMO technology, in combination with Orthogonal Frequency Division Multiple Access (OFDMA) becomes the leading candidate for future Fourth Generation (4G) network. 4G network is expected to offer higher throughput and reduce latency time, compared to current wireless standards.

Spatial Multiplexing (SM) is one of the transmission schemes in MIMO. SM aims to increase the link throughput effectively. However, SM scheme suffers severely in the presence of antenna correlation, also known as self-interference effect. Self-interference becomes the main limiting factor towards achieving higher throughput in a SM transmission. In a fully correlated channel, SM can only offer effective channel similar to a Single-Input Single-Output (SISO) system. This will diminish the capacity benefit that a MIMO transmission can offer.

The main aims of this research are (i) to exploit the self-interference knowledge from the MIMO channel, and (ii) combine this knowledge with the adaptive modulation scheme at each transmitter to combat the debilitating effect of self-interference in a correlated MIMO channel. The combination of subcarrier allocation and adaptive modulation scheme are expected to reduce the effect of self-interference, thus, contributes toward the goal of achieving reliable SM transmission in a spatially correlated MIMO channel.

Related Publications:

  1. Wasan Kadhim, Mahamod Ismail, Rosdiadee Nordin and Ayman A. El-Saleh, “Analysis of Energy Detection Scheme based Sensing and Optimality of the HDF Rules for Cognitive MIMO Radio Networks”, Journal of Computer Networks and Communications [ Under Review ]

  2. Saad, wasan kadhim; Ismail, Mahamod; Nordin, Rosdiadee; El-Saleh, Ayman A., "On the Performance of Cooperative Spectrum Sensing of Cognitive Radio Networks in AWGN and Rayleigh Fading Environments", KSII Transactions on Internet and Information Systems, 2013

  3. Mohd Nazrul Hanif Nordin, Rosdiadee Nordin, "Wireless Indoor MIMO Channel Propagation Prediction based on a 3-D Ray Tracing Technique", Journal Of Theoretical And Applied Information Technology (JATIT), Nov. 2013, 57(1): 54-60

  4. Rosdiadee Nordin, "Exploiting Spatial and Frequency Diversity in a Spatially Correlated MU-MIMO Downlink Channels", Journal of Computer Networks and Communications, Vol. 2012, Article ID 414796, 10 pages, 2012

  5. Wasan K. Saad, Mahamod Ismail and Rosdiadee Nordin, “Survey of Adaptive Modulation Scheme in MIMO Transmission”, Journal of Communications, Vol 7, No 12 (2012), 873-884, Dec 2012

  6. Rosdiadee Nordin, “Interference-Aware Subcarrier Allocation in a Correlated MIMO Downlink Transmission”, WSEAS Transactions on Communications, Vol. 11(4), April, 2012.

  7. Rosdiadee Nordin, "An Investigation of Self-Interference Reduction Strategy in a Spatially Correlated MIMO Channel", Journal of Computer Networks and Communications, Feb 2012

  8. Rosdiadee Nordin and Mahamod Ismail, "Partial Feedback Scheme with an Interference-Aware Subcarrier Allocation Scheme in a Correlated LTE Downlink", 19th Asia-Pacific Conference on Communications (APCC 2013)

  9. Rosdiadee Nordin, Mahamod Ismail, "Impact of Spatial Correlation towards the Performance of MIMO Downlink Transmissions", Proceedings of 18th Asia-Pacific Conference on Communications. APCC 2012, Oct. 2012

  10. Rosdiadee Nordin, Mahamod Ismail, "An Investigation of Self-Interference Reduction Strategy in Correlated SM-OFDMA Systems", Proceedings of 17th Asia-Pasific Conference on Communications. APCC 2011, Oct. 2011


14. Towards Green Radio Transmission: Joint Resource Allocation in a Multiuser-MIMO Downlink, 2011-2012

Project is under grant 'Dana Rangsangan UKM', sponsored by UKM

Description:

There has been a rapid growth in the number of global mobile subscribers over the past ten years. This cause increased in data traffic and the widespread use of complex spectrum efficient techniques, which translate to rapidly rising power consumption, particularly at the Base Station (BS). Thus, power inefficiency in a downlink transmission (from BS to Mobile Station) becomes the major issue in the development of wireless networks.

Power inefficiency contributes toward carbon emissions and increases the operating cost to the network operators. This has triggered a recent movement within the wireless research community, known as green radio network. The main goals of the green radio research can be summarised as follows: (i) to address the global environmental challenge due to inefficient power consumption from the large scale wireless network equipments, (ii) investigating and proposing effective mechanisms to drastically reduce energy wastage, and (iii) improve energy efficiency of mobile broadband communication systems, without compromising user’s perceived Quality of Service (QoS) and system capacity.

The use of Multiple-Input Multiple-Output (MIMO) antennas in wireless communication systems provides significant capacity gains. By exploiting the multiuser (MU) diversity from the MIMO architecture, the power efficiency can be improved significantly. The outcome of the research is expected to reduce the total power consumption at the BS downlink, thus improves the energy efficiency whilst ensures that the QoS guarantees are met. The research will be simulated in a future wireless network environment, also known as Fourth Generation (4G) network.

Related Publications:

  1. Mohammed Alsharif, Rosdiadee Nordin and Mahamod Ismail, "Survey of Green Radio Communications Networks: Techniques and Recent Advances", Journal of Computer Networks and Communications, Dec. 2013, 2013(4):1-13

  2. Mohammed Alsharif, Rosdiadee Nordin, Mahamod Ismail, "Energy-Efficient Subcarrier Optimization Scheme based on Particle Swarm for Green Radio Wireless Networks", 2013 IEEE 11th Malaysia International Conference on Communication (MICC 2013)


15. Mobile Health Application for Remote Post-Chemotherapy Patient Monitoring, 2012-2014

Sponsored by UKM, under UKM-Industry Grant, joint project with Prince Court Medical Center

Description:

The main aim of this research is to develop and validate a mobile phone based system to monitor the side effects for cancer patients undergoing treatment for cancer in order to reduce severe side-effects and hospitalization. The centralized monitoring system is expected to pick up severe symptoms early and perform the necessary intervention, thus improving the patient quality of life and promote efficient resource utilization due to reduced number of hospitalizations.