Pub Date : 2015-12-07DOI: 10.1109/PIMRC.2015.7343647
Vibhutesh Kumar Singh, Sanjeev Baghoriya, V. Bohara
Although there has been significant research and development on automation devices for assisted living, there has always been trade-offs in terms of the cost, complexity, design and efficiency. In this paper, a state-of-the-art simple and efficient yet cost effective reconfigurable assisted living system is proposed and implemented which will cater for the needs of bed-ridden patients, people with disability and senior citizens. The distinct feature which makes this implementation unique is its low cost, low power consuming hard ware and user-friendly control, hence the user can operate the system without any external assistance. Additionally, the proposed work is a good head-start towards Internet of Things (IoT) concept and provides multitude of input options to the user by integrating cellular communication and Zigbee protocol based wireless devices with Internet.
{"title":"HELPER: A home assisted and cost effective living system for people with disabilities and homebound elderly","authors":"Vibhutesh Kumar Singh, Sanjeev Baghoriya, V. Bohara","doi":"10.1109/PIMRC.2015.7343647","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343647","url":null,"abstract":"Although there has been significant research and development on automation devices for assisted living, there has always been trade-offs in terms of the cost, complexity, design and efficiency. In this paper, a state-of-the-art simple and efficient yet cost effective reconfigurable assisted living system is proposed and implemented which will cater for the needs of bed-ridden patients, people with disability and senior citizens. The distinct feature which makes this implementation unique is its low cost, low power consuming hard ware and user-friendly control, hence the user can operate the system without any external assistance. Additionally, the proposed work is a good head-start towards Internet of Things (IoT) concept and provides multitude of input options to the user by integrating cellular communication and Zigbee protocol based wireless devices with Internet.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132625000","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343448
Ammar Meer, Anas Daghistani, B. Shihada
Frame fragmentation into small blocks with dedicated error detection codes per block can reduce the unnecessary retransmission of the correctly received blocks. However, the optimal block size varies based on the wireless channel conditions. Further, blocks within a single frame may have different optimal sizes based on variations in interference patterns. This paper proposes a hybrid interference-resilient frame fragmentation (Hi-Frag) link-layer scheme for wireless sensor networks. It effectively addresses the challenges associated with dynamic partitioning of blocks while accounting for the observed error patterns. Hi-Frag is the first work to introduce an adaptive frame fragmentation scheme with hybrid block sizing, implemented and evaluated on a real WSN testbed. Hi-Frag shows substantial enhancements over fixed-size partial packet recovery protocols, achieving up to 2.5× improvement in throughput when the channel condition is noisy, while reducing network delays by up to 14% of the observed delay. On average, Hi-Frag shows 35% gain in throughput compared to static fragmentation approaches across all channel conditions used in our experiments. Also, Hi-Frag lowers the energy consumed per useful bit by 66% on average compared to conventional protocols, which increases the energy efficiency.
{"title":"An energy efficient hybrid interference-resilient frame fragmentation for wireless sensor networks","authors":"Ammar Meer, Anas Daghistani, B. Shihada","doi":"10.1109/PIMRC.2015.7343448","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343448","url":null,"abstract":"Frame fragmentation into small blocks with dedicated error detection codes per block can reduce the unnecessary retransmission of the correctly received blocks. However, the optimal block size varies based on the wireless channel conditions. Further, blocks within a single frame may have different optimal sizes based on variations in interference patterns. This paper proposes a hybrid interference-resilient frame fragmentation (Hi-Frag) link-layer scheme for wireless sensor networks. It effectively addresses the challenges associated with dynamic partitioning of blocks while accounting for the observed error patterns. Hi-Frag is the first work to introduce an adaptive frame fragmentation scheme with hybrid block sizing, implemented and evaluated on a real WSN testbed. Hi-Frag shows substantial enhancements over fixed-size partial packet recovery protocols, achieving up to 2.5× improvement in throughput when the channel condition is noisy, while reducing network delays by up to 14% of the observed delay. On average, Hi-Frag shows 35% gain in throughput compared to static fragmentation approaches across all channel conditions used in our experiments. Also, Hi-Frag lowers the energy consumed per useful bit by 66% on average compared to conventional protocols, which increases the energy efficiency.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115302795","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343573
Yu-Yi Chu, R. Harwahyu, R. Cheng, Chia-Hung Wei
The performance of contention-based access mechanism mainly depends on the resource allocation. This paper presents a generalized resource allocation scheme to support access prioritization in a multichannel slotted ALOHA system. The proposed scheme has great usability as it can be implemented in any similar mechanism such as OFDMA, which is used in LTE and beyond. We simulate its access-success probability and access delay in a one-shot random access attempt. The result demonstrates that the scheme can be used to represent any resource allocation schemes, such as dedicated, shared, partially-shared, as well as arbitrary resource allocation.
{"title":"Study of generalized resource allocation scheme for multichannel slotted ALOHA systems","authors":"Yu-Yi Chu, R. Harwahyu, R. Cheng, Chia-Hung Wei","doi":"10.1109/PIMRC.2015.7343573","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343573","url":null,"abstract":"The performance of contention-based access mechanism mainly depends on the resource allocation. This paper presents a generalized resource allocation scheme to support access prioritization in a multichannel slotted ALOHA system. The proposed scheme has great usability as it can be implemented in any similar mechanism such as OFDMA, which is used in LTE and beyond. We simulate its access-success probability and access delay in a one-shot random access attempt. The result demonstrates that the scheme can be used to represent any resource allocation schemes, such as dedicated, shared, partially-shared, as well as arbitrary resource allocation.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115666252","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343593
Shuo Zhang, Qing Guo, Yuming Wei
In this paper, a cooperative satellite system consisting of two satellites is considered. After building the channel model, the channel capacity is analysed. Since the propagation time of the signal via different satellites is not equal, a scheme to handle the propagation time difference is proposed. Considering the various propagation time difference of different users, the scheme takes advantage of a proper kind of Space-Time Trellis Code (STTC) to maintain the performance of the transmission. The simulation results show that the STTC has better performance than other coding schemes and can maintain the performance for the users with different propagation time difference.
{"title":"Performance of cooperative satellite communication based on space-time trellis code","authors":"Shuo Zhang, Qing Guo, Yuming Wei","doi":"10.1109/PIMRC.2015.7343593","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343593","url":null,"abstract":"In this paper, a cooperative satellite system consisting of two satellites is considered. After building the channel model, the channel capacity is analysed. Since the propagation time of the signal via different satellites is not equal, a scheme to handle the propagation time difference is proposed. Considering the various propagation time difference of different users, the scheme takes advantage of a proper kind of Space-Time Trellis Code (STTC) to maintain the performance of the transmission. The simulation results show that the STTC has better performance than other coding schemes and can maintain the performance for the users with different propagation time difference.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"48 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120839110","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343509
L. Yin, Xiping Wu, H. Haas
In this paper, the performance of non-orthogonal multiple access (NOMA) is characterized in a downlink visible light communication (VLC) system. Analytical expressions of the system performance are derived for two separate scenarios. In the scenario of achieving guaranteed quality of service (QoS), the outage probability of each user is studied and the effect of power allocation coefficients on the system coverage probability is investigated. In the scenario of providing opportunistic best-effort service, system ergodic sum rate is formulated based on a fixed power allocation (FPA) strategy. Both simulation and analytical results demonstrate that, in the first scenario, the maximum coverage probability can be achieved through the exhaustive search (ES) method to find the optimum set of power allocation coefficients. In the second scenario, it is shown that unlike orthogonal multiple access (OMA) techniques, NOMA can achieve a higher system capacity for a larger number of users. Also, the performance of NOMA can be further enhanced by choosing LEDs with a suitable semi-angle. When compared with OMA, NOMA can increase the system capacity by 125% if LEDs with 30° semi-angle are used.
{"title":"On the performance of non-orthogonal multiple access in visible light communication","authors":"L. Yin, Xiping Wu, H. Haas","doi":"10.1109/PIMRC.2015.7343509","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343509","url":null,"abstract":"In this paper, the performance of non-orthogonal multiple access (NOMA) is characterized in a downlink visible light communication (VLC) system. Analytical expressions of the system performance are derived for two separate scenarios. In the scenario of achieving guaranteed quality of service (QoS), the outage probability of each user is studied and the effect of power allocation coefficients on the system coverage probability is investigated. In the scenario of providing opportunistic best-effort service, system ergodic sum rate is formulated based on a fixed power allocation (FPA) strategy. Both simulation and analytical results demonstrate that, in the first scenario, the maximum coverage probability can be achieved through the exhaustive search (ES) method to find the optimum set of power allocation coefficients. In the second scenario, it is shown that unlike orthogonal multiple access (OMA) techniques, NOMA can achieve a higher system capacity for a larger number of users. Also, the performance of NOMA can be further enhanced by choosing LEDs with a suitable semi-angle. When compared with OMA, NOMA can increase the system capacity by 125% if LEDs with 30° semi-angle are used.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121126820","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343619
Onur Karatalay, Serhat Erküçük, T. Baykaş
TV White Spaces indicate spectrum bands, which were reserved for licensed terrestrial TV broadcasting and opened to unlicensed use under regulatory conditions. One important regulation which is common in all regulatory domains is no harmful interference is created to licensed devices. On the other hand, interference between unlicensed devices is not regulated. As a result system designers developed new methods to improve coexistence between TVWS networks. Extended busy tone, one of such methods, is designed for coexistence between wireless regional area and wireless local area networks based on IEEE 802.22 and 802.11af standards, respectively. In this paper we analyse the performance of extended busy tone at different range conditions and verify via simulations under realistic conditions. Our results indicate that the method can reduce interference considerably at intermediate distances and enable networks to operate without a significant reduction in throughput.
{"title":"Analysis of extended busy tone performance for coexistence between WRAN and WLAN TVWS networks","authors":"Onur Karatalay, Serhat Erküçük, T. Baykaş","doi":"10.1109/PIMRC.2015.7343619","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343619","url":null,"abstract":"TV White Spaces indicate spectrum bands, which were reserved for licensed terrestrial TV broadcasting and opened to unlicensed use under regulatory conditions. One important regulation which is common in all regulatory domains is no harmful interference is created to licensed devices. On the other hand, interference between unlicensed devices is not regulated. As a result system designers developed new methods to improve coexistence between TVWS networks. Extended busy tone, one of such methods, is designed for coexistence between wireless regional area and wireless local area networks based on IEEE 802.22 and 802.11af standards, respectively. In this paper we analyse the performance of extended busy tone at different range conditions and verify via simulations under realistic conditions. Our results indicate that the method can reduce interference considerably at intermediate distances and enable networks to operate without a significant reduction in throughput.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121273720","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343588
Yu-Hsien Lee, K. Liu
The deployment of energy harvesting (EH) nodes for information relaying is an appealing solution for wireless sensor networks as EH nodes are self-sustainable without the need of fixed power chords or frequent battery replacement. In practice, the energy arrival rate and the energy storage at EH relays may be limited and thus an EH relay may not always be available to perform data relaying due to energy shortage. In this paper, we consider the relay selection problem in a wireless network where each relay harvests energy from the radio-frequency (RF) signal and stores the harvested energy in a finite battery. We propose the battery-aware relay selection (BARS) scheme, which jointly considers the channel condition and the battery status for choosing a single relay to assist information delivery. The outage probability of the proposed scheme is analyzed theoretically by modeling the evolution of the battery status as a Markov chain. Simulations are performed to validate the analysis accuracy. Through numerical results, we show that with the proposed BARS scheme, EH relays can achieve full diversity but not with the relay selection scheme considering channel condition only.
{"title":"Battery-aware relay selection for energy-harvesting relays with energy storage","authors":"Yu-Hsien Lee, K. Liu","doi":"10.1109/PIMRC.2015.7343588","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343588","url":null,"abstract":"The deployment of energy harvesting (EH) nodes for information relaying is an appealing solution for wireless sensor networks as EH nodes are self-sustainable without the need of fixed power chords or frequent battery replacement. In practice, the energy arrival rate and the energy storage at EH relays may be limited and thus an EH relay may not always be available to perform data relaying due to energy shortage. In this paper, we consider the relay selection problem in a wireless network where each relay harvests energy from the radio-frequency (RF) signal and stores the harvested energy in a finite battery. We propose the battery-aware relay selection (BARS) scheme, which jointly considers the channel condition and the battery status for choosing a single relay to assist information delivery. The outage probability of the proposed scheme is analyzed theoretically by modeling the evolution of the battery status as a Markov chain. Simulations are performed to validate the analysis accuracy. Through numerical results, we show that with the proposed BARS scheme, EH relays can achieve full diversity but not with the relay selection scheme considering channel condition only.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127092195","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343488
W. Ejaz, K. Sithamparanathan, A. Anpalagan
Energy efficiency is one of the most critical design issues in wireless sensor networks (WSNs). Recently, RF energy transfer emerges as a promising solution to enhance energy efficiency. In RF energy transfer, energy is supplied to wireless networks through dedicated energy transmitters. WSNs can be equipped with the RF energy charging capabilities such that the WSNs are referred as wireless rechargeable sensor networks. This paper aims to 1) optimally place the energy transmitters and 2) determine optimal number of energy transmitters in WSNs with RF energy transfer. For optimal placement of energy transmitters, a trade-off between maximum energy charged in the network and fair distribution of energy is studied. We present a mechanism by defining a utility function to maximize both total energy charged and fairness. For optimal number of energy transmitters, an optimization problem is formulated and solved while satisfying the constraint on minimum energy charged by each sensor node. Simulation results illustrate the performance of WSNs with RF energy transfer in terms of average energy charged, fairness, and optimal number of energy transmitters.
{"title":"Optimal placement and number of energy transmitters in wireless sensor networks for RF energy transfer","authors":"W. Ejaz, K. Sithamparanathan, A. Anpalagan","doi":"10.1109/PIMRC.2015.7343488","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343488","url":null,"abstract":"Energy efficiency is one of the most critical design issues in wireless sensor networks (WSNs). Recently, RF energy transfer emerges as a promising solution to enhance energy efficiency. In RF energy transfer, energy is supplied to wireless networks through dedicated energy transmitters. WSNs can be equipped with the RF energy charging capabilities such that the WSNs are referred as wireless rechargeable sensor networks. This paper aims to 1) optimally place the energy transmitters and 2) determine optimal number of energy transmitters in WSNs with RF energy transfer. For optimal placement of energy transmitters, a trade-off between maximum energy charged in the network and fair distribution of energy is studied. We present a mechanism by defining a utility function to maximize both total energy charged and fairness. For optimal number of energy transmitters, an optimization problem is formulated and solved while satisfying the constraint on minimum energy charged by each sensor node. Simulation results illustrate the performance of WSNs with RF energy transfer in terms of average energy charged, fairness, and optimal number of energy transmitters.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126181299","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343506
Yezi Huang, E. Medeiros, Maria Nilma Fonseca, S. Höst, T. Magesacher, Per-Erik Eriksson, Chenguang Lu, Per Ödling, P. Börjesson
The densification of mobile networks in order to meet increased capacity demands is ongoing, needed and costly. A few papers have been published based on the insight that the fixed broadband networks offer a multitude of sites, for instance our homes, for potential small cell deployment providing backhaul capacity and power without site costs. However, in order to reach economical large-scale benefits, we explore the case when radio systems are deployed in coexistence with DSL. In this paper, we establish the feasibility of such a concept under constraints invoked by state-of-the-art and emerging systems (3GPP, VDSL2 and G.fast) and make statements about the required architecture. We also point out that the enthusiasm of previously published results should be lowered a notch.
{"title":"LTE over copper — Potential and limitations","authors":"Yezi Huang, E. Medeiros, Maria Nilma Fonseca, S. Höst, T. Magesacher, Per-Erik Eriksson, Chenguang Lu, Per Ödling, P. Börjesson","doi":"10.1109/PIMRC.2015.7343506","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343506","url":null,"abstract":"The densification of mobile networks in order to meet increased capacity demands is ongoing, needed and costly. A few papers have been published based on the insight that the fixed broadband networks offer a multitude of sites, for instance our homes, for potential small cell deployment providing backhaul capacity and power without site costs. However, in order to reach economical large-scale benefits, we explore the case when radio systems are deployed in coexistence with DSL. In this paper, we establish the feasibility of such a concept under constraints invoked by state-of-the-art and emerging systems (3GPP, VDSL2 and G.fast) and make statements about the required architecture. We also point out that the enthusiasm of previously published results should be lowered a notch.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123292505","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343312
Jinho Choi
For fifth generation (5G) cellular systems, various approaches are studied including millimeter-wave (mm-wave) communications and heterogeneous networks (HetNets) with small cells. In mm-wave bands, since a much wider bandwidth is available, higher data rates can be achieved. However, mm-wave transmissions suffer from blockage. In this paper, in order to take advantage of a wide bandwidth in mm-wave bands with mitigating the blockage problem, we consider a HetNet consisting of micro-wave base stations (BSs) for macro cells and mm-wave BSs for small cells and study its energy efficiency. We show that the energy efficiency of the considered HetNet can be maximized by choosing the optimal communication range of mm-wave BSs.
{"title":"Energy efficiency of a heterogeneous network using millimeter-wave small-cell base stations","authors":"Jinho Choi","doi":"10.1109/PIMRC.2015.7343312","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343312","url":null,"abstract":"For fifth generation (5G) cellular systems, various approaches are studied including millimeter-wave (mm-wave) communications and heterogeneous networks (HetNets) with small cells. In mm-wave bands, since a much wider bandwidth is available, higher data rates can be achieved. However, mm-wave transmissions suffer from blockage. In this paper, in order to take advantage of a wide bandwidth in mm-wave bands with mitigating the blockage problem, we consider a HetNet consisting of micro-wave base stations (BSs) for macro cells and mm-wave BSs for small cells and study its energy efficiency. We show that the energy efficiency of the considered HetNet can be maximized by choosing the optimal communication range of mm-wave BSs.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123772899","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}
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