In order to achieve dynamical optimization of mobility load balancing,we analyze the conflict between mobility load balancing and mobility robustness optimization caused by the improper operation of handover parameter...In order to achieve dynamical optimization of mobility load balancing,we analyze the conflict between mobility load balancing and mobility robustness optimization caused by the improper operation of handover parameters.To this end,a method of Handover Parameters Adjustment for Conflict Avoidance(HPACA)is proposed.Considering the movement of users,HPCAC can dynamically adjust handover range to optimize the mobility load balancing.The movement of users is an important factor of handover,which has a dramatic impact on system performance.The numerical evaluation results show the proposed approach outperforms the existing method in terms of throughput,call blocking ratio,load balancing index,radio link failure ratio,ping-pong handover ratio and call dropping ratio.展开更多
At present, the major drawback for mobile phones is the issue of power consumption. As one of the alternatives to decrease the power consumption of standard, power-hungry location-based services usually require the kn...At present, the major drawback for mobile phones is the issue of power consumption. As one of the alternatives to decrease the power consumption of standard, power-hungry location-based services usually require the knowledge of how individual phone features consume power. A typical phone feature is that the applications related to multimedia streaming utilize more power while receiving, processing, and displaying the multimedia contents, thus contributing to the increased power consumption. There is a growing concern that current battery modules have limited capability in fulfilling the long-term energy need for the progress on the mobile phone because of increasing power consumption during multimedia streaming processes. Considering this, in this paper, we provide an offline meaning sleep-mode method to compute the minimum power consumption comparing with the power-on solution to save power by implementing energy rate adaptation(RA) mechanism based on mobile excess energy level purpose to save battery power use. Our simulation results show that our RA method preserves efficient power while achieving better throughput compared with the mechanism without rate adaptation(WRA).展开更多
Vehicular ad hoc networks （VANETs） that use the IEEE 802.11p communication standard face a number of challenges, not least when it comes to safety messages on the VANET control channel （CCH） where short delay time...Vehicular ad hoc networks （VANETs） that use the IEEE 802.11p communication standard face a number of challenges, not least when it comes to safety messages on the VANET control channel （CCH） where short delay times and reliable delivery are of pri- mary importance. In this paper we propose a vehicular machine-to-machine （VM2M） overlay network that uses Long Term Evolu- tion （LTE） physical random access channel （PRACH） to emulate VANET CCH. The overlay network uses dedicated preambles to separate vehicular traffic from regular LTE traffic and a cartier sense multiple access with collision avoidance （CSMA-CA） layer similar to the one used in IEEE 802.15.4 to avoid the four step handshake and the overhead it incurs. The performance of the pro- posed overlay is evaluated under a wide range of PRACH parameters which conform to the scenarios with high vehicle velocities and large distances between roadside units （RSUs） that may be encountered in rural areas and on highways.展开更多
In present scenario of wireless communications,Long Term Evolution(LTE)based network technology is evolved and provides consistent data delivery with high speed andminimal delay through mobile devices.The traffic mana...In present scenario of wireless communications,Long Term Evolution(LTE)based network technology is evolved and provides consistent data delivery with high speed andminimal delay through mobile devices.The traffic management and effective utilization of network resources are the key factors of LTE models.Moreover,there are some major issues in LTE that are to be considered are effective load scheduling and traffic management.Through LTE is a depraved technology,it is been suffering from these issues.On addressing that,this paper develops an Elite Opposition based Spider Monkey Optimization Framework for Efficient Load Balancing(SMO-ELB).In this model,load computation of each mobile node is done with Bounding Theory based Load derivations and optimal cell selection for seamless communication is processed with Spider Monkey Optimization Algorithm.The simulation results show that the proposed model provides better results than exiting works in terms of efficiency,packet delivery ratio,Call Dropping Ratio(CDR)and Call Blocking Ratio(CBR).展开更多
文章提出一种融合ZigBee与长期演进(Long Term Evolution,LTE)的智能交通通信网络设计与实现方案,旨在提升智能交通系统的数据传输效率、实时性以及安全性。通过结合ZigBee的低功耗、短距离通信优势和LTE的广覆盖、高速率特点,构建了多...文章提出一种融合ZigBee与长期演进(Long Term Evolution,LTE)的智能交通通信网络设计与实现方案,旨在提升智能交通系统的数据传输效率、实时性以及安全性。通过结合ZigBee的低功耗、短距离通信优势和LTE的广覆盖、高速率特点,构建了多层次、互补性的通信网络架构。该系统不仅实现了车辆间及车辆与基础设施间的实时信息交互,还优化了数据传输路径,降低了网络能耗,为智能交通系统的全面发展提供了有力支持。展开更多
在LTE(Long Term Evolution)异构网络中,由于宏基站(Macro)与微微(Pico)基站的发射功率相差较大,一些离Pico基站较近的用户因为接收到的宏基站下行信号质量好于Pico基站而选择接入宏小区。然而,因为这些用户距离Pico基站较近,因此上行...在LTE(Long Term Evolution)异构网络中,由于宏基站(Macro)与微微(Pico)基站的发射功率相差较大,一些离Pico基站较近的用户因为接收到的宏基站下行信号质量好于Pico基站而选择接入宏小区。然而,因为这些用户距离Pico基站较近,因此上行通信会对Pico基站产生严重的上行干扰。小区覆盖增强(Range Expansion,RE)技术能够减少此类干扰,但同时又可能引入新的下行干扰。该文提出一种基于RE技术的上行干扰识别与协调机制(UIICRE),能够准确识别上行干扰源及其强度,并进行相应的干扰协调处理。仿真结果表明,该文提出的方案能够解决Pico小区的上行干扰问题,提升用户的上行通信质量,并保证用户下行通信质量不受影响。展开更多
基金supported by the National Natural Science Foundation of China under Grant No.61071118the National Basic Research Program of China(973 Program)under Grant No.2012CB316004+1 种基金Special Fund of Chongqing Key Laboratory(CSTC)Chongqing Municipal Education Commission’s Science and Technology Research Project under Grant No.KJ111506
文摘In order to achieve dynamical optimization of mobility load balancing,we analyze the conflict between mobility load balancing and mobility robustness optimization caused by the improper operation of handover parameters.To this end,a method of Handover Parameters Adjustment for Conflict Avoidance(HPACA)is proposed.Considering the movement of users,HPCAC can dynamically adjust handover range to optimize the mobility load balancing.The movement of users is an important factor of handover,which has a dramatic impact on system performance.The numerical evaluation results show the proposed approach outperforms the existing method in terms of throughput,call blocking ratio,load balancing index,radio link failure ratio,ping-pong handover ratio and call dropping ratio.
基金supported by X-Project funded by the Ministry of Science,ICT&Future Planning under Grant No.NRF-2015R1A2A1A16074929
文摘At present, the major drawback for mobile phones is the issue of power consumption. As one of the alternatives to decrease the power consumption of standard, power-hungry location-based services usually require the knowledge of how individual phone features consume power. A typical phone feature is that the applications related to multimedia streaming utilize more power while receiving, processing, and displaying the multimedia contents, thus contributing to the increased power consumption. There is a growing concern that current battery modules have limited capability in fulfilling the long-term energy need for the progress on the mobile phone because of increasing power consumption during multimedia streaming processes. Considering this, in this paper, we provide an offline meaning sleep-mode method to compute the minimum power consumption comparing with the power-on solution to save power by implementing energy rate adaptation(RA) mechanism based on mobile excess energy level purpose to save battery power use. Our simulation results show that our RA method preserves efficient power while achieving better throughput compared with the mechanism without rate adaptation(WRA).
文摘Vehicular ad hoc networks （VANETs） that use the IEEE 802.11p communication standard face a number of challenges, not least when it comes to safety messages on the VANET control channel （CCH） where short delay times and reliable delivery are of pri- mary importance. In this paper we propose a vehicular machine-to-machine （VM2M） overlay network that uses Long Term Evolu- tion （LTE） physical random access channel （PRACH） to emulate VANET CCH. The overlay network uses dedicated preambles to separate vehicular traffic from regular LTE traffic and a cartier sense multiple access with collision avoidance （CSMA-CA） layer similar to the one used in IEEE 802.15.4 to avoid the four step handshake and the overhead it incurs. The performance of the pro- posed overlay is evaluated under a wide range of PRACH parameters which conform to the scenarios with high vehicle velocities and large distances between roadside units （RSUs） that may be encountered in rural areas and on highways.
文摘In present scenario of wireless communications,Long Term Evolution(LTE)based network technology is evolved and provides consistent data delivery with high speed andminimal delay through mobile devices.The traffic management and effective utilization of network resources are the key factors of LTE models.Moreover,there are some major issues in LTE that are to be considered are effective load scheduling and traffic management.Through LTE is a depraved technology,it is been suffering from these issues.On addressing that,this paper develops an Elite Opposition based Spider Monkey Optimization Framework for Efficient Load Balancing(SMO-ELB).In this model,load computation of each mobile node is done with Bounding Theory based Load derivations and optimal cell selection for seamless communication is processed with Spider Monkey Optimization Algorithm.The simulation results show that the proposed model provides better results than exiting works in terms of efficiency,packet delivery ratio,Call Dropping Ratio(CDR)and Call Blocking Ratio(CBR).
文摘文章提出一种融合ZigBee与长期演进(Long Term Evolution,LTE)的智能交通通信网络设计与实现方案,旨在提升智能交通系统的数据传输效率、实时性以及安全性。通过结合ZigBee的低功耗、短距离通信优势和LTE的广覆盖、高速率特点,构建了多层次、互补性的通信网络架构。该系统不仅实现了车辆间及车辆与基础设施间的实时信息交互,还优化了数据传输路径,降低了网络能耗,为智能交通系统的全面发展提供了有力支持。
文摘在LTE(Long Term Evolution)异构网络中,由于宏基站(Macro)与微微(Pico)基站的发射功率相差较大,一些离Pico基站较近的用户因为接收到的宏基站下行信号质量好于Pico基站而选择接入宏小区。然而,因为这些用户距离Pico基站较近,因此上行通信会对Pico基站产生严重的上行干扰。小区覆盖增强(Range Expansion,RE)技术能够减少此类干扰,但同时又可能引入新的下行干扰。该文提出一种基于RE技术的上行干扰识别与协调机制(UIICRE),能够准确识别上行干扰源及其强度,并进行相应的干扰协调处理。仿真结果表明,该文提出的方案能够解决Pico小区的上行干扰问题,提升用户的上行通信质量,并保证用户下行通信质量不受影响。
