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Hasan, Monowar,Hossain, Ekram,Dong In Kim IEEE 2014 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS Vol.13 No.4
<P>Device-to-device (D2D) communication in cellular networks allows direct transmission between two cellular devices with local communication needs. Due to the increasing number of autonomous heterogeneous devices in future mobile networks, an efficient resource allocation scheme is required to maximize network throughput and achieve higher spectral efficiency. In this paper, performance of network-integrated D2D communication under channel uncertainties is investigated where D2D traffic is carried through relay nodes. Considering a multi-user and multi-relay network, we propose a robust distributed solution for resource allocation with a view to maximizing network sum-rate when the interference from other relay nodes and the link gains are uncertain. An optimization problem is formulated for allocating radio resources at the relays to maximize end-to-end rate as well as satisfy the quality-of-service (QoS) requirements for cellular and D2D user equipments under total power constraint. Each of the uncertain parameters is modeled by a bounded distance between its estimated and bounded values. We show that the robust problem is convex and a gradient-aided dual decomposition algorithm is applied to allocate radio resources in a distributed manner. Finally, to reduce the cost of robustness defined as the reduction of achievable sum-rate, we utilize the chance constraint approach to achieve a trade-off between robustness and optimality. The numerical results show that there is a distance threshold beyond which relay-aided D2D communication significantly improves network performance when compared to direct communication between D2D peers.</P>
An Efficient Rate Control Protocol for Wireless Sensor Network Handling Diverse Traffic
Muhammad Mostafa Monowar,Md. Obaidur Rahman,Choong Seon Hong(홍충선) 한국정보과학회 2007 한국정보과학회 학술발표논문집 Vol.34 No.2A
Wireless Sensor Network typically incorporates diverse applications within the same network. A sensor node may have multiple sensors i.e. light, temperature, seismic etc with different transmission characteristics. Each application has different characteristics and requirements in terms of transmission rates, bandwidth, packet loss and delay demands may be initiated towards the sink. In this paper we propose Heterogeneous Traffic Oriented Rate Control Protocol (HTRCP) which ensures efficient rate control for diverse applications according to the priority specified by the sink. Moreover, HTRCP ensures the node priority based hop by hop dynamic rate adjustment for high link utilization.
Data Predicted Wakeup Based Duty Cycle MAC for Wireless Sensor Networks
( Muhammad Mostafa Monowar ),( Obaidur Rahman ),( Choong Seon Hong ),( Cho Jin Woong Lee ),( Hyun Seok ) 한국정보처리학회 2009 한국정보처리학회 학술대회논문집 Vol.16 No.2
Presuming energy as a crucial resource, several duty cycle based MAC protocol have been proposed for wireless sensor network. However, these protocols have long latency problem for paying more attention on energy efficiency. In this paper, we propose Data Predicted Wakeup Based Duty Cycle MAC (DPW-MAC) for Wireless Sensor Networks for delay sensitive periodic applications in which timely delivery of data is a major concern with the maintenance of duty cycle.
An Rate Control Protocol for Real Time Traffic in Wireless Sensor Network
모하마드 무스타파 모노워(Muhammad Mostafa Monowar),엠디 오베이둘 라만(Md. Obaidur Rahman),홍충선(Choong Seon Hong) 한국정보과학회 2008 한국정보과학회 학술발표논문집 Vol.35 No.1
Wireless Sensor Network typically incorporates various real time applications that must meet timing constraints under severe resource limitations. Due to the high data rate and burst traffic for that type of applications, occurrence of congestion is very common. Ensuring the end-to-end deadline under congested scenario is quite challenging. In this paper we propose a hop-by-hop rate control algorithm which avoids the congestion as well as ensures that the real time traffic will meet the end-to-end deadline by guaranteeing the meeting of local deadline at intermediate hop. Finally, simulation has demonstrated the effectiveness of our approach.
Eurasian Economic Union: Evolution, challenges and possible future directions
Golam Mostafa,Monowar Mahmood 한양대학교 아태지역연구센터 2018 Journal of Eurasian Studies Vol.9 No.2
Armenia, Belarus, Kazakhstan, Kyrgyzstan and Russia formed the Eurasian Economic Union (EEU) with the aim of fostering closer economic cooperation among member states for the well-being of the people of the region. This paper critically analyses the history and evolution of the EEU as well as its success, challenges and prospects. Despite numerous attempts and initiatives, the EEU’s actions have hardly achieved any significant success because most of its goals have either been declarative in nature or politically motivated and not taken seriously. Russian domination, influence, control and pressure may also be reasons for lack of progress and success. Long, bitter historical memories and distrust among the member states also made the integration process difficult. The article concludes that this latest attempt at integration in the former USSR region seems to be in trouble and may result in failure because of deteriorating economic conditions in Russia, the crisis facing the ruble, Russia’s continuous conflict with Ukraine and distrust among the member states.
Luo Fan,Monowar Mahmood,Md. Aftab Uddin 서울대학교 교육연구소 2019 Asia Pacific Education Review Vol.20 No.1
This study investigates the impact of supervisor support on research innovation pursuit among international doctoral students in China. A total of 120 international doctoral students’ responses were employed through random sampling from the three business schools of Chinese public universities. The data were analyzed using the partial least squares technique, a second-generation statistical software package for structural equation modeling. The results revealed that supervisor support significantly affects students’ research innovation endeavors. The study also suggests that supportive supervision is necessary for fostering citizenship behavior, creativity and innovation pursuit among international doctoral students. The findings of this pioneering study will help higher education administrators, and policymakers revisit existing doctoral program management and deliveries processes and encourage academic supervisors to modify guidance and mentoring procedures for doctoral students.
An Efficient Duty Cycle Based Communication Scheme for Wireless Sensor Network
( Obaidur Rahman ),( Muhammad Mostafa Monowar ),( Cho Jin Woong ),( Lee Jang Yeon ),( Choong Seon Hong ) 한국정보처리학회 2009 한국정보처리학회 학술대회논문집 Vol.16 No.2
Due to the limitation of battery life time, energy is one of the most crucial issues for wireless sensor networks. Thus this paper proposes an energy efficient duty cycle scheme to conserve energy mostly. To handle the large varieties of data (i.e., both low and high traffic load) the proposed duty cycle scheme ensures a fair access period (FAP) and a prioritized access period (PAP). The idea presented in this paper able to reduce the collision probability and energy consumption. Finally simulation outputs have demonstrated the effectiveness of the proposed duty cycle task and showed a noticeable performance in terms of energy usage.