Yiqian Xu, G. Feng, Liang Liang, Shuang Qin, Zhi Chen
{"title":"MTC data aggregation for 5G network slicing","authors":"Yiqian Xu, G. Feng, Liang Liang, Shuang Qin, Zhi Chen","doi":"10.23919/APCC.2017.8304005","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304005","url":null,"abstract":"Recently network slicing has been identified as a promising network architectural technology for the next generation mobile cellular networks (5G) to address the challenges stemming from a wide range of applications. Especially, for machine type communication (MTC) application, it is widely recognized that traditional cellular network architecture is not adequate to meet the requirements in terms of massive connectivity and low latency. For exploiting network slicing, data aggregation (DA) can be adopted to effectively address the massive connectivity and latency requirement. In this paper, we propose an efficient network slicing data aggregation (NSDA) scheme for MTC applications. Different from conventional DA scheme where data aggregation is performed based on device locations, we perform DA according to latency requirement for MTC devices (MTCDs), with aim to exploit the benefits of network slicing and thus improve network access capacity and decrease access latency. We formulate the DA problem as a 0–1 Linear Programming and propose an efficient two-step algorithm to aggregate the MTC data for accessing a specific network slice. We examine the performance of our proposed NSDA in typical MTC scenarios via simulations. Numerical results reveal that NSDA significantly outperforms traditional MTC access schemes (without network slicing) in terms of network capacity, access congestion degree, latency, etc.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115836564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Performance improvement of multi-user chaos MIMO transmission scheme using dirty paper coding","authors":"Naoto Horiike, E. Okamoto, Tetsuya Yamamoto","doi":"10.23919/APCC.2017.8303988","DOIUrl":"https://doi.org/10.23919/APCC.2017.8303988","url":null,"abstract":"The multi-user multiple-input multiple-output (MU-MIMO) scheme is one of the main methods for improving the frequency-efficiency in wireless communication systems. In MU-MIMO systems, a base station equipped with multiple antennas and a large number of receivers with multiple antennas communicate simultaneously. Conventionally, we adopted the principle of chaos communications to MU-MIMO and proposed a multi-user chaos MIMO (MU-C-MIMO) scheme that has physical layer security between each receiver. In the previous study, we utilized block diagonalization (BD) — a liner precoding method — to remove interference components in MU-C-MIMO. On the one hand, channel gain for each user is not maximized in BD. On the other hand, the gain maximization can be realized using nonlinear precoding, and further improvement of transmission quality is expected in MU-C-MIMO. Therefore, in this paper, we propose a MU-C-MIMO scheme using dirty paper coding (DPC), a nonlinear precoding method, in order to realize the most ideal precoding characteristics. The effectiveness of this scheme is evaluated through numerical simulations with comparisons to a conventional MU-C-MIMO system with BD.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126824038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A generalized systematic comma free code","authors":"Tianbo Xue, F. Lau","doi":"10.23919/APCC.2017.8304026","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304026","url":null,"abstract":"For channels that introduce substitution, insertion and deletion errors, one challenging problem for a code designer is to avoid false code synchronization. In other words, the probability of false codewords occurring should be minimized with appropriate code design. In this paper, we propose a new class of systematic comma free code called generalized F(n, s, t) code. We first prove that this code is a synchronous code and then we derive the probabilities of false synchronization when a substitution, insertion or deletion error occur. We compare the theoretical and simulation results under different parameters. We also compare the performance of our proposed code with the classical F code.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133774573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Accurate and efficient ber evaluation for high-speed OFDM systems impaired by TI-ADC circuit's gain mismatch","authors":"V. Huynh, N. Noels, H. Steendam","doi":"10.23919/APCC.2017.8304011","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304011","url":null,"abstract":"This paper presents an efficient procedure to numerically evaluate the exact bit error rate of a rectangular quadrature amplitude modulated-orthogonal frequency division multiplexing (OFDM) system that is impaired by the gain mismatch of a time-interleaved analog-to-digital converter. As opposed to previous contributions, no approximations are involved in this procedure. The obtained results allow to accurately analyze the effect of this type of mismatch on the performance of practical high-speed OFDM systems. The accuracy and efficiency of the proposed technique are demonstrated by comparing analytical results with brute-force Monte-Carlo simulations.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"151 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131003677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Tomlinson-Harashima precoding for physical layer security in MIMO-OFDM systems","authors":"Satoru Nakajima, T. Saba","doi":"10.23919/APCC.2017.8304053","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304053","url":null,"abstract":"This paper proposes a physical layer security technique using Tomlinson-Harashima precoding (THP) for multiple-input multiple-output (MIMO) systems under the presence of a passive eavesdropper. In the proposed scheme, a transmitter performs THP considering both the channel for the legitimate receiver and the randomly generated channel for an imaginary receiver which does not exist actually. Since the imaginary receiver's channel is arbitrarily generated at the transmitter, the eavesdropper cannot estimate it. Therefore, the proposed scheme can provide secure communications. Moreover, in THP, the transmitter performs the precoding so that the diversity can be obtained at the receiver. Therefore, the proposed scheme can achieve a higher mutual information. From simulation results, we show that the proposed scheme achieves a better mutual information compared to the existing artificial fast fading schemes.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115504201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Power-saving coercive sleep mode for machine type communications","authors":"Shuai Huang, G. Feng, Liang Liang, Shuang Qin","doi":"10.23919/APCC.2017.8304004","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304004","url":null,"abstract":"Machine type communication (MTC) is deemed as one of the killer applications in 5G mobile communication networks, for which power saving is an important yet challenging issue. In current cellular networks, most proposed power-saving mechanisms are designed for human-to-human (H2H) communications, and thus not applicable to MTC. Hence, it is imperative to design effective power-saving mechanisms for MTC in 5G networks. 3GPP has proposed Discontinuous Reception (DRX) mechanism to allow users receive data at specified time slots and turn off the radio module at other time slots, aiming at reducing power consumption. In this paper we design an energy efficient coercive sleep mode (CSM) to reduce power consumption, based on the idea of DRX. In CSM, a metric “NUMBER” is introduced to record the number of packets in addition to inactivity timer in DRX. We use a semi-Markov process to model mechanism, for evaluating the power saving factor and wake up latency. We also employ simulation to examine the impact of DRX parameters on system performance. Numerical results show that CSM achieves significantly higher energy efficiency and is thus appropriate for low cost MTC, compared with standard DRX.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"46 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123564658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Adaptive initial interpolation vector setting method in iterative time-domain compression method for MIMO channel state information","authors":"Masafumi Iizuka, K. Tateishi, K. Higuchi","doi":"10.23919/APCC.2017.8304033","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304033","url":null,"abstract":"In this paper, we investigate adaptive settings for the initial interpolation vector in our previous iterative time-domain compression method for multiple-input multiple-output (MIMO) channel state information (CSI). The iterative MIMO-CSI compression method is based on time-domain CSI compression with frequency-domain CSI bundling and interpolation for all combinations of transmitter and receiver antennas. Previously, the method for generating the initial interpolation vector, which reuses the actual frequency-domain CSI variation, was proposed in order to take into account the periodical channel variation in the frequency domain. However, in this method, the appropriate length interpolation vector is dependent on the delay spread of the channel. In order to address this problem, this paper proposes adaptively controlling of the length of the interpolation vector based on the correlation of the CSI vector in the frequency domain. The numerical results show that the proposed method further improves the accuracy of the compressed CSI or enhances the CSI compression capability of the previous method, which assumes a fixed length for the interpolation vector.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122341227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Distributed resource allocation for wireless virtualized energy harvesting small cell networks","authors":"Zheng Chang, Chunlei Jing, Xijuan Guo, Yunjian Jia","doi":"10.23919/APCC.2017.8304080","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304080","url":null,"abstract":"Wireless network visualization is envisioned as a promising framework to provide efficient and customized services for next-generation wireless networks. In wireless virtualized networks (WVNs), limited radio resources are shared among different service providers for providing services to different users with heterogeneous demands. In this work, we propose a distributed resource allocation scheme for a wireless virtualized small cell networks. The SBSs in the considered system are equipped with self-backhaul and energy harvesting capabilities in order to reduce the operation cost. In particular, with the objective to obtain the utility maximization, a joint user association, time, spectrum and power allocation problem is presented. To tackle the formulated mixed combinatorial and non-convex optimization problem, the original problem is divided into three low-complexity subproblems and we propose an alternating direction method of multipliers (ADMM)-based distributed algorithm to address them efficiently and effectively. Simulation studies are conducted to demonstrate the advantages of our presented system architecture and proposed schemes.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123596758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yu Han, Shi Jin, Jun Zhang, Jiayi Zhang, Kai‐Kit Wong
{"title":"Analog beam selection schemes of DFT-based hybrid beamforming multiuser systems","authors":"Yu Han, Shi Jin, Jun Zhang, Jiayi Zhang, Kai‐Kit Wong","doi":"10.23919/APCC.2017.8304065","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304065","url":null,"abstract":"This paper studies analog beam selection schemes of discrete Fourier transform (DFT) based hybrid beamforming systems. We first derive approximations of the achievable rates when maximum-ratio combining (MRC) receiver and maximum-ratio transmitting (MRT) precoder are used in the uplink and downlink, respectively. It is shown that the achievable rate of the hybrid beamforming system is improved with the increase of the number of radio frequency chains. Also, it is found that the orthogonality condition among the line-of-sight (LoS) paths from different users directly determines the interference cancellation capability of the MRC receiver or the MRT precoder. Based on our analytical results, we propose two novel DFT beam selection schemes, referred to as exhausted searching and per-user selection. Numerical results show that the first scheme achieves higher rate while the second one is a simple suboptimal strategy with low complexity, which is practically more attractive.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121046944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design of a multi-carrier different chaos shift keying communication system in doubly selective fading channels","authors":"Menglei Chen, Weikai Xu, Deqing Wang, L. Wang","doi":"10.23919/APCC.2017.8304014","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304014","url":null,"abstract":"In this paper, a novel chaos modulation scheme, which combines code-shifted differential chaos shift keying (CS-DCSK) with orthogonal frequency division multiplexing (OFDM) is presented, namely OFDM-CS-DCSK. In the proposed scheme, the reference signal and the information bearing signal of CS-DCSK are firstly formed by Walsh code sequences, then different chips of the CS-DCSK signal are mapped onto different subcarriers of OFDM. Utilizing the characteristics of OFDM and CS-DCSK, the proposed scheme has robust performance over time-frequency doubly selective fading channel. In addition, the proposed system has low complexity because channel estimation, channel equalizer and the radio frequency (RF) delay circuits are not required at its receiver. By the computer simulations, bit error rate (BER) performances of the proposed scheme are compared with OFDM-DCSK and CS-DCSK under various channel parameters. Simulation results indicate that the proposed scheme has significant performance advantages over OFDM-DCSK and CS-DCSK in time-frequency doubly selective fading channel.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122750432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}