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| 1 | Mobility-Aware Partial Computation Offloading in Vehicular Networks: A Deep Reinforcement Learning Based Scheme显示文摘Encouraged by next-generation networks and autonomous vehicle systems,vehicular networks must employ advanced technologies to guarantee personal safety,reduce traffic accidents and ease traffic jams.By leveraging the computing ability at the network edge,multi-access edge computing(MEC)is a promising technique to tackle such challenges.Compared to traditional full offloading,partial offloading offers more flexibility in the perspective of application as well as deployment of such systems.Hence,in this paper,we investigate the application of partial computing offloading in-vehicle networks.In particular,by analyzing the structure of many emerging applications,e.g.,AR and online games,we convert the application structure into a sequential multi-component model.Focusing on shortening the application execution delay,we extend the optimization problem from the single-vehicle computing offloading(SVCOP)scenario to the multi-vehicle computing offloading(MVCOP)by taking multiple constraints into account.A deep reinforcement learning(DRL)based algorithm is proposed as a solution to this problem.Various performance evaluation results have shown that the proposed algorithm achieves superior performance as compared to existing offloading mechanisms in deducing application execution delay. | Jianfei Wang Tiejun Lv Pingmu Huang P.Takis Mathiopoulos | 2020 | China Communications2020，17，10： | 7 |
| 2 | Pilot reuse and power control of D2D underlaying massive MIMO systems for energy efficiency optimization显示文摘It is predicted that there will be billions of machine type communication(MTC) devices to be deployed in near future. This will certainly cause severe access congestion and system overload which is one of the major challenges for the proper operation of 5G networks. Adopting device-to-device(D2D) communications into massive multiple-input multiple-output(MIMO) systems has been considered as a potential solution to alleviate the overload of MTC devices by offloading the MTC traffic onto D2 D links. This work proposes a novel pilot reuse(PR) and power control(PC) for energy efficiency(EE) optimization of the uplink D2 D underlaying massive MIMO cellular systems. Although the use of large scale antenna array at the base station(BS) can eliminate most of the D2D-to-Cellular interference, the Cellular-to-D2 D interference and the channel estimation error caused by PR will remain significant. Motivated by this, and in order to reduce the channel estimation error, in this paper a novel heuristic PR optimum pilot reuse scheme is proposed for D2 D transmitters(D2DTs)selection. By taking into account the interference among users as well as the overall power consumption, the overall system EE is maximized through power optimization while maintaining the quality-of-service(Qo S)provisions for both cellular users(CUEs) and D2 D pairs. The power optimization problem is modeled as a non-cooperative game and, as such, a distributed iterative power control algorithm which optimizes users' power sequentially is proposed. Various performance evaluation results obtained by means of computer simulations have shown that the proposed PR scheme and PC algorithm can significantly increase the overall system EE. | Shenghao XU Haixia ZHANG Jie TIAN P.Takis MATHIOPOULOS | 2017 | Science China(Information Sciences)2017，60，10： | 3 |
| 3 | Outage analysis of cognitive two-way relaying networks with SWIPT over Nakagami-m fading channels显示文摘Dear editor,Green wireless communication has attracted the attention of the research community in recent years[1,2].Simultaneous wireless information and power transfer(SWIPT)technique is an attractive research area,since it enables the wireless nodes | Jing YANG Xiqi GAO Shanyang HAN Kostas P.PEPPAS P.Takis MATHIOPOULOS | 2018 | Science China(Information Sciences)2018，61，2： | 2 |
| 4 | Outage Performance of Cognitive DF Relaying Networks Employing SWIPT显示文摘In this paper, the outage performance of a cognitive relaying network over Nakagami-m fading channels, employing simultaneous wireless information and power transfer(SWIPT) technology is analyzed and evaluated. The operation of this network is considered in conjunction with the conventional decode-and-forward(DF) and incremental DF(IDF) protocols. For the conventional DF protocol, it is assumed that there is no direct link between the secondary transmitter(S) and the secondary destination(D), while(for both protocols) after harvesting energy, the relay node(R) always helps to forward the resulting signal to D. However, for the IDF protocol, R assists in relaying S's information to D only when the direct communication between S and D has failed. Furthermore, for both DF and IDF protocols, we assume there is no power supply for R, and R harvests energy from the transmitted signal of S. We derive exact analytical expressions for the outage probability at D in DF and IDF protocols, respectively, in terms of the bivariate Meijer's G-function. Performance evaluation results obtained by means of Monte-Carlo simulations are also provided and have validated the correctness of the proposed analysis. | jing yang yiyun cheng kostas p.peppas p.takis mathiopoulos jie ding | 2018 | China Communications2018，15，4： | 2 |
| 5 | Performance analysis of M-ary PPM TH-UWB systems in the presence of MUI and timing jitter 显示文摘 | Kokkalis N V Mathiopoulos P T Karagiannidis G K Koukourlis C S | 2006 | IEEE Journal nn Selected Areas in Communications2006，24，4： | 1 |
| 6 | Rate-compatible IRA codes using quadratic congruential extension sequences and puncturing显示文摘 | Benmayor D Mathiopoulos P Constantinou P | 2010 | IEEE Communications Letters2010，14，5： | 1 |
| 7 | Genetic markers in ribosomal DNA for the identification of members of the genus Anisakis (Nematoda : Ascaridoidea) defined by polymerase chain reaction-based restriction fragment length polymorphism 显示文摘 | D'Amelio S Mathiopoulos K D Santos C P | 2000 | Int J Parasitol2000，30，2： | 1 |
| 8 | Diagnosis of a case of gastric anisakidosis by PCR based restriction frag ment length polymorphism analysis显示文摘 | D'Amelio S Mathiopoulos KD Brandonisio O | 1999 | Parassitologia1999，41，4： | 1 |
| 9 | Analytical level crossing rates and average fade durations for diversity techniques in Nakagami fading channels显示文摘 | MATHIOPOULOS P | 2002 | IEEE Transaction on Communications2002，50，8： | 1 |
| 10 | N* Nakagami: a novel stochastic model for cascaded fading channels显示文摘 | KARAGIANNIDIS G K SAGIAS N C MATHIOPOULOS P T | 2007 | IEEE Trans on Commun2007，55，8： | 1 |
| 11 | Analytical level crossing rates and average fade durations for diversity techniques in Nakagami fading channels显示文摘 | Iskander C D Mathiopoulos P T | 2002 | IEEE Transactions on Communications2002，50，8： | 1 |
| 12 | Non-regenerative Dual-hop Cooperative Links with Selection Diversity显示文摘 | Tsiftsis T A Karagiannidis G K Mathiopoulos P T | 2006 | EURASIP Journal on Wireless Communications and Netw orking2006，，2： | 1 |
| 13 | An Exact Performance Analysis of MRC/OSTBC over Generalized Fading Channels显示文摘 | Ropokis G A Rontogiannis A A Mathiopoulos P T | 2010 | IEEE Transactions on Communications2010，58，9： | 1 |
| 14 | Performance of Multicode DS/CDMA with Noncoherent M-ary Orthogonal Modulation in Multipath Fading Channels显示文摘 | Iskander C D Mathiopoulos P T | 2004 | IEEE Trans on Wireless Communications2004，3，1： | 1 |
| 15 | Multiple differential detection of parallel concat enated convolutional (Turbo) codes in correlated fast Rayleigh fading 显示文摘 | P T Mathiopoulos | 1998 | IEEE J Sel Areas Commun1998，16，： | 1 |
| 16 | A geometry and texture coupled flexible generalization of urban build- ing models显示文摘 | Zhang M Zhang L Mathiopoulos P T | 2012 | ISPRS Journal of Photogrammetry and Re- mote Sensing2012，70，6： | 1 |
| 17 | A Comparison Study of the Uplink Performance of W-CDMA and OFDM for Mobile Multi-media Communication via LEO Satellites显示文摘 | Papathanassiou A Salkintzis A K Mathiopoulos P T | 2001 | IEEE Personal Communication2001，8，3： | 1 |
| 18 | Genetic markers in ribosomal DNA for the identification of members of the genus Anisakis(Nematoda:Ascaridoidea)defined by polymerase chain reaction-based restriction fragment length polymorphism显示文摘 | D'Amelio S Mathiopoulos KD Santos CP | 2000 | Inter J parasitol2000，30，： | 1 |
| 19 | Exact perfor-mance analysis of dual-branch coherent equal-gain combining in Nakagami-m, Rician, and Hoyt fading显示文摘 | Iskander C D Mathiopoulos P T | 2008 | IEEE Trans Veh Technol2008，57，2： | 1 |
| 20 | Performance of multicode DS/CDMA with noncoherent M-ary orthogonal modulation in multipath fading channels 显示文摘 | Iskander C D Mathiopoulos P T | 2004 | IEEE Transactions on Wireless Communications2004，3，1： | 1 |
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