A Sequence Frequency Reuse Scheme for Coordinated Multi-Point Transmission in LTE-A

[[abstract]]OFDMA communication technology becomes for the next generation mobile communication systems (4G)standards. Decreasing Inter-Cell Interference (ICI) is one of important issues in OFDMA. A new technology of LTE-A (Lone Term Evolution-Advanced) is CoMP(Coordinate Multi-Point, CoMP) transmission, which purpose is to solve low performance and poor quality of transmission due to interference cause by. Even through there are many LTE research papers are presented to explore the use of frequency reuse mechanism to solve the ICI, but they are inappropriate for CoMP technology. In this paper, we propose an efficiently Sequence Frequency Reuse (SeFR) scheme to improve low performance that cause by ICI, and making restrict in ICI seriously region to work smoothly on CoMP. According to the results of simulation, the proposed mechanism makes the CoMP transmission to achieve higher efficiency in the use of, and improves the SINR value of CEU (Cell Edge Users).[[abstract]]OFDMA communication technology becomes for the next generation mobile communication systems (4G) standards. Decreasing Inter-Cell Interference (ICI) is one of important issues in OFDMA. A new technology of LTE-A (Lone Term Evolution-Advanced) is CoMP(Coordinate Multi-Point, CoMP) transmission, which purpose is to solve low performance and poor quality of transmission due to interference cause by. Even through there are many LTE research papers are presented to explore the use of frequency reuse mechanism to solve the ICI, but they are inappropriate for CoMP technology. In this paper, we propose an efficiently Sequence Frequency Reuse (SeFR) scheme to improve low performance that cause by ICI, and making restrict in ICI seriously region to work smoothly on CoMP. According to the results of simulation, the proposed mechanism makes the CoMP transmission to achieve higher efficiency in the use of, and improves the SINR value of CEU (Cell Edge Users).[[sponsorship]]World Academy of Science[[conferencetype]]國際[[conferencedate]]20130722~20130725[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]Las Vegas, Nevada, US

An Efficient Intra Skip Decision Algorithm for H.264/AVC Video Coding

[[abstract]]In this study, we propose a simple, highly efficient intra skip decision algorithm to reduce the computational complexity of H.264/AVC coding. It utilizes information such as the best mode and the rate value of the RD cost function, which are all pre-calculated. These values are calculated in the corresponding macroblock (MB) of the previous frame and the neighbouring MBs of the current frame in order to develop an intra skip decision rule. Our experimental results demonstrated that without the additional time-consuming computation, the proposed algorithm reduces encoding time by approximately 50% compared with the time needed for an exhaustive search and it significantly increases the time saving by 17%-30% compared with the existing algorithms. In addition, our experimental results showed that the differences in peak signal-to-noise ratio degradation are negligible and the bit rate increment is minimal.[[notice]]補正完畢[[journaltype]]國內[[incitationindex]]EI[[ispeerreviewed]]Y[[booktype]]電子版[[countrycodes]]TW

Cooperating intelligent mobile agents mechanism for distributed multimedia synchronization

[[abstract]]With the development of distributed multimedia systems, there has been much research on how to reduce network traffic and how to initialize and gather the distributed multimedia resources. We propose a robust system using intelligent mobile agents to construct an automatic and adaptation mechanism for distributed multimedia synchronization. Furthermore, an adaptive quality of service (QoS) mechanism is also support by this system. The Distributed Multimedia Synchronization Agent (DMSAgent) system is proposed to improve the efficiency of distributed multimedia networks. Furthermore, using intelligent and mobile agent technology will reduce the frequency of handshaking between client and server.[[conferencetype]]國際[[conferencedate]]20000730~20000802[[iscallforpapers]]Y[[conferencelocation]]New York, NY, US

A Fuzzy-based Dynamic Channel Allocation Scheme in Cognitive Radio Networks

[[abstract]]In traditional wireless networks, fixed allocation of spectrum is one of the main reason causing low utilization of spectrum. In order to solve this problem, a new wireless communication model has been proposed, which called Cognitive Radio Networks (CRN). CRN adopts Dynamic Spectrum Access (DSA) technology, thus it can flexibly use the spectrum which primary user temporarily unused. In cognitive radio networks, due to each secondary user (SU) has different location and surrounding spectrum environment, it may have variety of available channels. How to assign these available channels is the crucial point of system performance. However, existing methods doesn’t consider the problem of multipath fading; therefore, this study proposed an improved channel allocation scheme. We consider the received signal strength to define the channel access priority of secondary users applied by fuzzy theory. Finally, the simulation results show the superior of our approach and verify the effectiveness of the proposed scheme.[[conferencetype]]兩岸[[conferencedate]]20140822~20140824[[booktype]]電子版[[iscallforpapers]]Y[[conferencelocation]]北京, 中