{"title":"Using RTS/CTS to enhance the performance of IEEE 802.15.6 CSMA/CA","authors":"Martina Barbi, K. Sayrafian-Pour, M. Alasti","doi":"10.1109/PIMRC.2016.7794841","DOIUrl":"https://doi.org/10.1109/PIMRC.2016.7794841","url":null,"abstract":"IEEE 802.15.6 is a radio interface standard for a wireless connectivity of wearable and implantable sensors and actuators located inside or in close proximity to the human body i.e. Body Area Network (BAN). Medical applications requirements impose stringent constraints on the reliability, and quality of service performance in these networks. Assuming CSMA/CA MAC protocol as outlined in the IEEE 802.15.6 standard Intra-BAN interference as well as interference from other co-located BANs or nearby devices sharing the same spectrum could greatly impact the data link reliability in these networks. Specifically, inter-BAN interference caused by hidden and exposed nodes could lead to higher packet delays or lower successful packet reception. In this paper, we study the use of a RTS/CTS handshake mechanism to improve the performance of IEEE 802.15.6-based CSMA/CA when multiple co-located BANs are present. Simulation results demonstrate that the introduction of RTS/CTS mechanism is able to significantly reduce packet collisions, resulting in a tangible improvement in system performance.","PeriodicalId":137845,"journal":{"name":"2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128334617","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":"FQAM-FBMC design and its application to machine type communication","authors":"Y. Qi, M. Tesanovic","doi":"10.1109/PIMRC.2016.7794588","DOIUrl":"https://doi.org/10.1109/PIMRC.2016.7794588","url":null,"abstract":"In this paper, we propose a novel waveform design which efficiently combines two air interface components: Frequency and Quadrature-Amplitude Modulation (FQAM) and Filter Bank Multicarrier (FBMC). The proposed approach takes the unique characteristics of FQAM into consideration and exploits the design of prototype filters for FBMC to effectively avoid self-interference between adjacent subcarriers in the complex domain, thus providing improved performance compared with conventional solutions in terms of self-interference, spectrum confinement and complexity with negligible rate loss. The resulting waveform properties are proven in this paper to be particularly suitable for Machine Type Communications (MTC) devices due to the observed reduced PAPR and lowered energy consumption. MTC has created a new eco-system that gives rise to a plethora of interesting applications and new business opportunities in the fifth-Generation (5G) mobile system and services — the enabling technology for the emerging paradigm of Internet of Things (IoT).","PeriodicalId":137845,"journal":{"name":"2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128401005","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":"Dynamic resource allocation exploiting mobility prediction in mobile edge computing","authors":"J. Plachy, Zdenek Becvar, E. Strinati","doi":"10.1109/PIMRC.2016.7794955","DOIUrl":"https://doi.org/10.1109/PIMRC.2016.7794955","url":null,"abstract":"In 5G mobile networks, computing and communication converge into a single concept. This convergence leads to introduction of Mobile Edge Computing, where computing resources are distributed at the edge of mobile network, i.e., in base stations. This approach significantly reduces delay for computation of tasks offloaded from users' devices to cloud and reduces load of backhaul. However, due to users' mobility, optimal allocation of the computational resources at the base stations might change over time. The computational resources are allocated in a form of Virtual Machines (VM), which emulate a given computer system. User's mobility can be solved by VM migration, i.e., transfer of VM from one base station to another. Another option is to find a new communication path for exchange of data between the VM and the user. In this paper we propose an algorithm enabling flexible selection of communication path together with VM placement. To handle dynamicity of the system, we exploit prediction of users' movement. The prediction is used for dynamic VM placement and to find the most suitable communication path according to expected users' movement. Comparing to state of the art approaches, the proposal leads to reduction of the task offloading delay between 10% and 66% while energy consumed by user's equipment is kept at similar level. The proposed algorithm also enables higher arrival rate of the offloading requirements.","PeriodicalId":137845,"journal":{"name":"2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124759525","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}
Chunqing Zhang, L. Laughlin, M. Beach, K. Morris, J. Haine
{"title":"A self-interference cancellation testbed for full-duplex transceiver prototyping","authors":"Chunqing Zhang, L. Laughlin, M. Beach, K. Morris, J. Haine","doi":"10.1109/PIMRC.2016.7794587","DOIUrl":"https://doi.org/10.1109/PIMRC.2016.7794587","url":null,"abstract":"In-Band Full Duplex (IBFD) transceivers can potentially provide significant increases in spectral efficiency by allowing simultaneous transmit and receive on the same frequency at the same time. However any such gains are conditional on effective cancellation of the self-interference. The performance of a self-interference cancellation transceiver depends not only on the system design, but also on implementation specific parameters of the transceiver and cancellation circuitry. Thus, realistic evaluation of cancellation performance can only be performed using hardware prototypes. This paper provides a detailed overview of a highly flexible and reconfigurable self-interference cancellation testbed, which combines active cancellation with either separate Tx and Rx antennas, or an Electrical Balance Duplexer, along with digital baseband cancellation. The system can facilitate investigation on self-interference cancellation performance across a range of physical layer configurations, and provide a platform for the rapid prototyping of digital baseband algorithms within an operational self-interference cancelling transceiver.","PeriodicalId":137845,"journal":{"name":"2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129701243","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}
M. Bulenok, I. Tunaru, L. Biard, B. Denis, B. Uguen
{"title":"Experimental channel-based secret key generation with integrated ultra wideband devices","authors":"M. Bulenok, I. Tunaru, L. Biard, B. Denis, B. Uguen","doi":"10.1109/PIMRC.2016.7794705","DOIUrl":"https://doi.org/10.1109/PIMRC.2016.7794705","url":null,"abstract":"In wireless decentralized networks, security and privacy become more challenging due to stringent architecture and sometimes low-complexity constraints. Confidentiality of the transmissions is usually achieved by symmetric cryptography, which implies the distribution of identical secret keys to the legitimate nodes. Classical solutions for symmetric key distribution can be too complex from a computational or infrastructural point of view. An alternative would be physical layer key generation, which exploits the radio channel as a source of common information. This paper looks into the generation of secret keys from Impulse Radio — Ultra Wideband (IR-UWB) channels using low-power integrated devices. We investigate the possibility to generate identical secret bit sequences in practical environments (e.g., possibly occupied indoor rooms) and operating conditions (e.g., mobility) under specific hardware limitations inherent to device integration (e.g., time resolution and signal dynamics). The main challenge is to obtain reciprocal and random bits at an acceptable rate. Taking into account these three criteria (i.e., reciprocity, randomness, and key length), we describe and evaluate a new quantization scheme adapted to the channel impulse responses acquired by real devices.","PeriodicalId":137845,"journal":{"name":"2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126698616","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":"Hierarchical mesh routing implementation for indoor data collection","authors":"V. Rabarijaona, F. Kojima, H. Harada","doi":"10.1109/PIMRC.2016.7794787","DOIUrl":"https://doi.org/10.1109/PIMRC.2016.7794787","url":null,"abstract":"We have implemented a hierarchical mesh (HM) based routing protocol for data collection in an indoor environment. Devices are autonomously organized into a hierarchy based on a metric used to evaluate links between two devices, and end-to-end paths. The HM-based routing is implemented at the link layer over the MAC layer in a working WPAN (IEEE 802.15.4) and uses MAC addresses. A mesh root initiates the construction of the HM and acts as the data collector of the network. Data collection can begin as soon as the HM topology is established and does not require additional route establishment signaling. Devices select a next hop from a neighbor table and do not need to have knowledge of the entire path. We observe efficient routing with limited link layer retransmissions through our experiments. Additionally, the use of data concatenation reduces the number of transmissions in the network as well as the probability of collisions, providing a promising solution in high density and high traffic applications.","PeriodicalId":137845,"journal":{"name":"2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126809873","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}
Dedan Meng, Li Guo, Chao Dong, Qian Deng, Tianyu Kang
{"title":"Non-reused pilot design for large-scale multi-cell multiuser MIMO system","authors":"Dedan Meng, Li Guo, Chao Dong, Qian Deng, Tianyu Kang","doi":"10.1109/PIMRC.2016.7794945","DOIUrl":"https://doi.org/10.1109/PIMRC.2016.7794945","url":null,"abstract":"A non-reused pilot (NRP) design scheme is presented for Large-scale multi-cell multiuser multiple-input multiple-output (LS-MIMO) systems. As the users at the cell edge suffer from severe pilot contamination (PC), the pilot design based on Chu sequences for two kinds of users is considered. The users in each cell are divided into center users and edge users according to the large-scale fading coefficients. The proposed pilot design scheme can reduce inter-cell interference of center users and improve the performance of edge users, whereby assigning phase shifted pilot groups to center users in adjacent cells and orthogonal pilot group to edge users in all cells.","PeriodicalId":137845,"journal":{"name":"2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129282357","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}
L. Militano, A. Orsino, G. Araniti, Michele Nitti, L. Atzori, A. Iera
{"title":"Trusted D2D-based data uploading in in-band narrowband-IoT with social awareness","authors":"L. Militano, A. Orsino, G. Araniti, Michele Nitti, L. Atzori, A. Iera","doi":"10.1109/PIMRC.2016.7794568","DOIUrl":"https://doi.org/10.1109/PIMRC.2016.7794568","url":null,"abstract":"Fifth generation (5G) systems are expected to introduce a revolution in the ICT domain with innovative networking features, such as device-to-device (D2D) communications. Accordingly, in-proximity devices directly communicate with each other, thus avoiding routing the data across the network infrastructure. This innovative technology is deemed to be also of high relevance to support effective heterogeneous objects interconnection within future IoT ecosystems. However, several open challenges shall be solved to achieve a seamless and reliable deployment of proximity-based communications. In this paper, we give a contribution to trust and security enhancements for opportunistic hop-by-hop forwarding schemes that rely on cellular D2D communications. To tackle the presence of malicious nodes in the network, reliability and reputation notions are introduced to model the level of trust among involved devices. To this aim, social-awareness of devices is accounted for, to better support D2D-based multihop content uploading. Our simulative results in small-scale IoT environments, demonstrate that data loss due to malicious nodes can be drastically reduced and gains in uploading time be reached with the proposed solution.","PeriodicalId":137845,"journal":{"name":"2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123861710","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":"Battery state based power and time allocation in wireless powered MIMO uplink transmission","authors":"Liqin Shi, Liqiang Zhao, Kai Liang","doi":"10.1109/PIMRC.2016.7794924","DOIUrl":"https://doi.org/10.1109/PIMRC.2016.7794924","url":null,"abstract":"In this paper, we study a radio frequency (RF) wireless energy transfer (WET) enabled multiple input multiple output (MIMO) system which consists of a base station (BS) and a user equipment (UE) with a finite capacity battery. A time slotted transmission pattern is considered. Each slot can be divided into two phases, downlink (DL) WET and uplink (UL) wireless information transmission (WIT). The battery State-Of-Charge (SOC) which is defined as the ratio of energy available in the current battery to battery capacity is considered. Given a fixed SOC, the maximum acceptable charging power of the battery is determined, which provides an idea for the BS to reduce energy loss at the UE by adjusting transmission power. The optimization problem is formulated to minimize the transmission energy. The problem is proved convex and a power and time allocation algorithm is proposed to achieve an optimal solution. The numerical results show that our proposed algorithm has better performance than other existing schemes.","PeriodicalId":137845,"journal":{"name":"2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124018618","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 power and resource allocation for weighted sum energy-efficiency maximization in OFDMA smallcell network","authors":"Guodong Zhang, Jinming Hu, Wei Heng, G. Wang","doi":"10.1109/PIMRC.2016.7794879","DOIUrl":"https://doi.org/10.1109/PIMRC.2016.7794879","url":null,"abstract":"In this paper, we investigate the problem of maximizing the weighted sum energy efficiency (WS-EE) in downlink OFDMA smallcell network. To solve the problem in a distributed manner and reduce the complexity, we decompose the resource blocks (RBs) allocation and the power control into two subproblems. For the subproblem of RBs allocation, the optimal RBs allocation strategy is obtained based on rate maximization given any feasible network power profile. For the subproblem of power control, a novel distributed pricing based algorithm is developed with limited inter-smallcell coordination. Specifically, each smallcell base station (SBS) updates its current interference information and broadcasts it to the other SBSs. With this collected information, the optimal power control strategy of each SBS is derived. Simulation results show that the proposed algorithm outperforms the existing algorithms in terms of the WS-EE.","PeriodicalId":137845,"journal":{"name":"2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126560432","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}