Pub Date : 2016-04-03DOI: 10.1109/WCNC.2016.7564669
G. Tran, Hidekazu Shimodaira, R. Rezagah, K. Sakaguchi, K. Araki
5G communication networks will bring enhanced mobile broadband services to users and vertical markets supporting very wide range requirements from context-dependent applications. To support such applications in 5G, not only the conventional area traffic capacity but network energy efficiency is also a critical factor since energy consumption of information processing is also becoming an economic issue for operators. Dealing with this problem, our project considers a C-RAN based cloud cooperated HetNet architecture which enables global resource optimization among smallcells to maximize objective functions of interest e.g. energy efficiency. On the other hand, a dynamic traffic model based on that the network can dynamically adapt to the variation in a cost-effective way is also crucial for the design of 5G. This paper develops such traffic model based on realistic measurement data in metropolitan Tokyo. Based on the developed model, a on-demand cell activation / deactivation jointly with user association mechanism is applied to maximize the network's energy efficiency defined as the system rate over the total consumed energy. Numerical results show the effectiveness of the proposed algorithm against dynamic variation of hourly traffic while improving users' satisfaction as compared to conventional homogeneous network. The paper also confirms the superiority of mm-wave smallcell HetNet against conventional microwave HetNet in terms of energy efficiency in bps/W.
{"title":"Practical evaluation of on-demand smallcell ON/OFF based on traffic model for 5G cellular networks","authors":"G. Tran, Hidekazu Shimodaira, R. Rezagah, K. Sakaguchi, K. Araki","doi":"10.1109/WCNC.2016.7564669","DOIUrl":"https://doi.org/10.1109/WCNC.2016.7564669","url":null,"abstract":"5G communication networks will bring enhanced mobile broadband services to users and vertical markets supporting very wide range requirements from context-dependent applications. To support such applications in 5G, not only the conventional area traffic capacity but network energy efficiency is also a critical factor since energy consumption of information processing is also becoming an economic issue for operators. Dealing with this problem, our project considers a C-RAN based cloud cooperated HetNet architecture which enables global resource optimization among smallcells to maximize objective functions of interest e.g. energy efficiency. On the other hand, a dynamic traffic model based on that the network can dynamically adapt to the variation in a cost-effective way is also crucial for the design of 5G. This paper develops such traffic model based on realistic measurement data in metropolitan Tokyo. Based on the developed model, a on-demand cell activation / deactivation jointly with user association mechanism is applied to maximize the network's energy efficiency defined as the system rate over the total consumed energy. Numerical results show the effectiveness of the proposed algorithm against dynamic variation of hourly traffic while improving users' satisfaction as compared to conventional homogeneous network. The paper also confirms the superiority of mm-wave smallcell HetNet against conventional microwave HetNet in terms of energy efficiency in bps/W.","PeriodicalId":436094,"journal":{"name":"2016 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126026699","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 : 2016-04-03DOI: 10.1109/WCNC.2016.7564718
S. Qureshi, Syed Ali Hassan
Non-orthogonal multiple access (NOMA) is a key enabling technology for fifth generation (5G) wireless networks because of its ability to provide greater spectral efficiency. However, a conventional NOMA scheme offers significant interference and higher outage probability especially when the number of users in the network is large. Therefore, in this paper, we propose a suboptimal algorithm which uses the concept of successive bandwidth division (SBD) in NOMA system, which not only reduces the complexity of the receiver side to a great extent, but also enhances the overall signal-to-interference plus noise ratio (SINR) of the uplink NOMA by supporting 2N users with just N base station (BS) antennas. The BS is assumed to have perfect channel state information (CSI) and uses a zero-forcing (ZF) postcoding matrix to recover the signals of different users. Numerical results show that the performance of the proposed scheme outperforms the conventional NOMA techniques in terms of receiver complexity and outage probability.
{"title":"MIMO uplink NOMA with successive bandwidth division","authors":"S. Qureshi, Syed Ali Hassan","doi":"10.1109/WCNC.2016.7564718","DOIUrl":"https://doi.org/10.1109/WCNC.2016.7564718","url":null,"abstract":"Non-orthogonal multiple access (NOMA) is a key enabling technology for fifth generation (5G) wireless networks because of its ability to provide greater spectral efficiency. However, a conventional NOMA scheme offers significant interference and higher outage probability especially when the number of users in the network is large. Therefore, in this paper, we propose a suboptimal algorithm which uses the concept of successive bandwidth division (SBD) in NOMA system, which not only reduces the complexity of the receiver side to a great extent, but also enhances the overall signal-to-interference plus noise ratio (SINR) of the uplink NOMA by supporting 2N users with just N base station (BS) antennas. The BS is assumed to have perfect channel state information (CSI) and uses a zero-forcing (ZF) postcoding matrix to recover the signals of different users. Numerical results show that the performance of the proposed scheme outperforms the conventional NOMA techniques in terms of receiver complexity and outage probability.","PeriodicalId":436094,"journal":{"name":"2016 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131594604","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 : 2016-04-03DOI: 10.1109/WCNC.2016.7564672
R. Nilsson, Jaap van de Beek
In this paper, we describe and analyze the results of a radio channel measurement campaign in an extreme industrial environment; a large open-pit copper mine targeted by next generation's highly voiced device communications. We present a practical and efficient method to perform robust and high-sensitivity impulse response measurements without a common clock reference using the widely spread USRP hardware. With this technique, we performed channel sounding on a large number of locations within the mine. One important observation is that the radio channel's impulse response in an open-pit mine can often be more than 10 μs long, and much unlike the responses normally associated with Wi-Fi and mobile cellular radio systems, which poses serious design challenges for future 5G radio systems.
{"title":"Channel measurements in an open-pit mine using USRPs: 5G - expect the unexpected","authors":"R. Nilsson, Jaap van de Beek","doi":"10.1109/WCNC.2016.7564672","DOIUrl":"https://doi.org/10.1109/WCNC.2016.7564672","url":null,"abstract":"In this paper, we describe and analyze the results of a radio channel measurement campaign in an extreme industrial environment; a large open-pit copper mine targeted by next generation's highly voiced device communications. We present a practical and efficient method to perform robust and high-sensitivity impulse response measurements without a common clock reference using the widely spread USRP hardware. With this technique, we performed channel sounding on a large number of locations within the mine. One important observation is that the radio channel's impulse response in an open-pit mine can often be more than 10 μs long, and much unlike the responses normally associated with Wi-Fi and mobile cellular radio systems, which poses serious design challenges for future 5G radio systems.","PeriodicalId":436094,"journal":{"name":"2016 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122702164","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 : 2016-04-03DOI: 10.1109/WCNC.2016.7564639
S. Sahin, T. Ozbilgin
We investigate the error performance of a satellite-to-ground optical link between a low-earth orbit (LEO) satellite and an optical ground station (OGS) in which a geostationary orbit (GEO) satellite is used as a relay. We perform a bit-error probability (BEP) analysis by taking the atmospheric turbulence effects and pointing errors into account. We use pulse position modulation (PPM) and consider both decode-and-forward (DF) and amplify-and-forward (AF) relaying schemes. Results show that for small pointing errors DF scheme outperforms AF scheme in terms of bit error rate (BER) performance. We also demonstrate that error control coding can significantly improve error performances especially for high pointing errors.
{"title":"On the performance of downlink optical communication via relaying in the presence of pointing errors","authors":"S. Sahin, T. Ozbilgin","doi":"10.1109/WCNC.2016.7564639","DOIUrl":"https://doi.org/10.1109/WCNC.2016.7564639","url":null,"abstract":"We investigate the error performance of a satellite-to-ground optical link between a low-earth orbit (LEO) satellite and an optical ground station (OGS) in which a geostationary orbit (GEO) satellite is used as a relay. We perform a bit-error probability (BEP) analysis by taking the atmospheric turbulence effects and pointing errors into account. We use pulse position modulation (PPM) and consider both decode-and-forward (DF) and amplify-and-forward (AF) relaying schemes. Results show that for small pointing errors DF scheme outperforms AF scheme in terms of bit error rate (BER) performance. We also demonstrate that error control coding can significantly improve error performances especially for high pointing errors.","PeriodicalId":436094,"journal":{"name":"2016 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117195285","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 : 2016-04-03DOI: 10.1109/WCNC.2016.7564649
A. Ghanbari, Oscar Álvarez, J. Markendahl
Looking for new markets and revenue streams, the future Smart Cities comprise a good opportunity for traditional actors of the telecommunication industry. This opportunity requires a new mindset among these actors that corresponds to re-positioning in the Smart City value chain. This means that, in order to play a role that can not be overlooked, Telecom actors should perform rather different blocks of the Smart City value chain compared to their traditional activity blocks in Mobile Telephony value chain. The Fifth Generation of mobile telecommunications technology (5G), by some actors, is then considered as the major ICT enabler for this new paradigm. This paper intends to highlight the role of Machine Type Communications (MTC) for enabling Smart Cities. In order to do so, we introduce the building blocks of Smart City followed by four use cases from Intelligent Transport Systems and Digital Built Environment. We use these cases as the proof of concept for defining the generic MTC activities in the context of Smart City. Eventually the paper introduces the MTC value network in the context of Smart City, based on the resources associated with the activities.
{"title":"MTC value network for Smart City ecosystems","authors":"A. Ghanbari, Oscar Álvarez, J. Markendahl","doi":"10.1109/WCNC.2016.7564649","DOIUrl":"https://doi.org/10.1109/WCNC.2016.7564649","url":null,"abstract":"Looking for new markets and revenue streams, the future Smart Cities comprise a good opportunity for traditional actors of the telecommunication industry. This opportunity requires a new mindset among these actors that corresponds to re-positioning in the Smart City value chain. This means that, in order to play a role that can not be overlooked, Telecom actors should perform rather different blocks of the Smart City value chain compared to their traditional activity blocks in Mobile Telephony value chain. The Fifth Generation of mobile telecommunications technology (5G), by some actors, is then considered as the major ICT enabler for this new paradigm. This paper intends to highlight the role of Machine Type Communications (MTC) for enabling Smart Cities. In order to do so, we introduce the building blocks of Smart City followed by four use cases from Intelligent Transport Systems and Digital Built Environment. We use these cases as the proof of concept for defining the generic MTC activities in the context of Smart City. Eventually the paper introduces the MTC value network in the context of Smart City, based on the resources associated with the activities.","PeriodicalId":436094,"journal":{"name":"2016 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128684606","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 : 2016-04-03DOI: 10.1109/WCNC.2016.7564717
Hyunsoon Kim, J. Bang, Sooyong Choi, D. Hong
Filter-bank based multi-carrier systems have recently attracted lots of interest as a promising approach for the next generation wireless communication systems. Due to high complexity and long symbol duration, however, these systems need to evolve in a new multi-carrier technique, universal-filtered multi-carrier (UFMC). In conventional UFMC systems, a fixed size of resource block (RB) reduces the flexibility of spectrum utilization and leads to high computational complexity. This problem highlights the need for RB size control that will efficiently allocate frequency resource to satisfy users' resource demand. In this paper, we propose a generalized UFMC system for uplink scenario. First, we analyze the impact of RB size on the UFMC spectrum utilization and complexity. Then, we observe the effect of filter length on symbol error rate (SER). Based on this observation, the proposed UFMC system controls RB size and filter length according to users' demand. Finally, we demonstrate that the proposed system tremendously improves throughput per sub-carrier without SER performance degradation.
{"title":"Resource block management for uplink UFMC systems","authors":"Hyunsoon Kim, J. Bang, Sooyong Choi, D. Hong","doi":"10.1109/WCNC.2016.7564717","DOIUrl":"https://doi.org/10.1109/WCNC.2016.7564717","url":null,"abstract":"Filter-bank based multi-carrier systems have recently attracted lots of interest as a promising approach for the next generation wireless communication systems. Due to high complexity and long symbol duration, however, these systems need to evolve in a new multi-carrier technique, universal-filtered multi-carrier (UFMC). In conventional UFMC systems, a fixed size of resource block (RB) reduces the flexibility of spectrum utilization and leads to high computational complexity. This problem highlights the need for RB size control that will efficiently allocate frequency resource to satisfy users' resource demand. In this paper, we propose a generalized UFMC system for uplink scenario. First, we analyze the impact of RB size on the UFMC spectrum utilization and complexity. Then, we observe the effect of filter length on symbol error rate (SER). Based on this observation, the proposed UFMC system controls RB size and filter length according to users' demand. Finally, we demonstrate that the proposed system tremendously improves throughput per sub-carrier without SER performance degradation.","PeriodicalId":436094,"journal":{"name":"2016 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126522395","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 : 2016-04-03DOI: 10.1109/WCNC.2016.7564708
R. Ratasuk, B. Vejlgaard, N. Mangalvedhe, Amitava Ghosh
In 3GPP, a narrowband system based on Long Term Evolution (LTE) is being introduced to support the Internet of Things. This system, named Narrowband Internet of Things (NB-IoT), can be deployed in three different operation modes - (1) stand-alone as a dedicated carrier, (2) in-band within the occupied bandwidth of a wideband LTE carrier, and (3) within the guard-band of an existing LTE carrier. In stand-alone operation mode, NB-IoT can occupy one GSM channel (200 kHz) while for in-band and guard-band operation modes, it will use one physical resource block of LTE (180 kHz). The design targets of NB-IoT include low-cost devices, high coverage (20-dB improvement over GPRS), long device battery life (more than 10 years), and massive capacity. Latency is relaxed although a delay budget of 10 seconds is the target for exception reports. The specifications for NB-IoT are expected to be finalized in 2016. In this paper, we describe the targets for NB-IoT and present a preliminary system design. In addition, coverage, capacity, latency, and battery life analysis are also presented.
{"title":"NB-IoT system for M2M communication","authors":"R. Ratasuk, B. Vejlgaard, N. Mangalvedhe, Amitava Ghosh","doi":"10.1109/WCNC.2016.7564708","DOIUrl":"https://doi.org/10.1109/WCNC.2016.7564708","url":null,"abstract":"In 3GPP, a narrowband system based on Long Term Evolution (LTE) is being introduced to support the Internet of Things. This system, named Narrowband Internet of Things (NB-IoT), can be deployed in three different operation modes - (1) stand-alone as a dedicated carrier, (2) in-band within the occupied bandwidth of a wideband LTE carrier, and (3) within the guard-band of an existing LTE carrier. In stand-alone operation mode, NB-IoT can occupy one GSM channel (200 kHz) while for in-band and guard-band operation modes, it will use one physical resource block of LTE (180 kHz). The design targets of NB-IoT include low-cost devices, high coverage (20-dB improvement over GPRS), long device battery life (more than 10 years), and massive capacity. Latency is relaxed although a delay budget of 10 seconds is the target for exception reports. The specifications for NB-IoT are expected to be finalized in 2016. In this paper, we describe the targets for NB-IoT and present a preliminary system design. In addition, coverage, capacity, latency, and battery life analysis are also presented.","PeriodicalId":436094,"journal":{"name":"2016 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125878597","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 : 2016-04-03DOI: 10.1109/WCNCW.2016.7552681
Malla Reddy Sama, Xueli An, Q. Wei, S. Beker
Industrial and academic focus in recent years has been shifting towards the Fifth Generation Mobile Networks (5G). In the horizon 2020, the key improvements will rely on technical breakthroughs in the radio access networks, mainly to bring increased bandwidth to the user devices. However, there is still much discussion ongoing about the evolution required in the core network to accommodate increased demands from existing services (e.g. in the number of devices) and services which are not feasible or efficiently implemented with today's architecture. Disruptive approaches can even be considered if the horizon for such changes is extended to 2025. Due to the advance of virtualization and SDN technologies, it is very promising that the current mobile core network could gain more flexibility, support multiple radio access network generations in parallel, and meanwhile enrich its ecosystem to generate new revenue opportunities. In this paper, we would like to discuss the feasibility to design a flexible and adaptive mobile core network based on functional decomposition and network slicing concepts. This paper will provide a guideline and enlighten strategic directions for future mobile core network research.
{"title":"Reshaping the Mobile core network via function decomposition and network slicing for the 5G era","authors":"Malla Reddy Sama, Xueli An, Q. Wei, S. Beker","doi":"10.1109/WCNCW.2016.7552681","DOIUrl":"https://doi.org/10.1109/WCNCW.2016.7552681","url":null,"abstract":"Industrial and academic focus in recent years has been shifting towards the Fifth Generation Mobile Networks (5G). In the horizon 2020, the key improvements will rely on technical breakthroughs in the radio access networks, mainly to bring increased bandwidth to the user devices. However, there is still much discussion ongoing about the evolution required in the core network to accommodate increased demands from existing services (e.g. in the number of devices) and services which are not feasible or efficiently implemented with today's architecture. Disruptive approaches can even be considered if the horizon for such changes is extended to 2025. Due to the advance of virtualization and SDN technologies, it is very promising that the current mobile core network could gain more flexibility, support multiple radio access network generations in parallel, and meanwhile enrich its ecosystem to generate new revenue opportunities. In this paper, we would like to discuss the feasibility to design a flexible and adaptive mobile core network based on functional decomposition and network slicing concepts. This paper will provide a guideline and enlighten strategic directions for future mobile core network research.","PeriodicalId":436094,"journal":{"name":"2016 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131443163","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 : 2016-04-03DOI: 10.1109/WCNC.2016.7564709
S. I. Orakwue, R. Ngah, T. Rahman
This paper presents the planar implementation of a two dimensional (2-D) beam steering array antenna with a cascaded 2 × 2 Butler Matrix (BM) as the beamformer. A single layer has been chosen to ensure low cost and ease fabrication. The four input ports of the proposed antenna have the capability of producing four independent directional beam patterns scanning from -18° to 23° at x-y plane and from -20° to 22° at the y-z plane respectively. The radiation efficiency obtained from each of the four ports at the designed frequency are 92.6%, 92.1%, 91.4%, and 87.8% respectively. The maximum antenna gain of 15.1 dBi is obtained at port P1. The proposed antenna has a null free elevation plane and therefore will be suitable for base station application of the proposed fifth generation mobile communications.
{"title":"A two dimensional beam scanning array antenna for 5G wireless communications","authors":"S. I. Orakwue, R. Ngah, T. Rahman","doi":"10.1109/WCNC.2016.7564709","DOIUrl":"https://doi.org/10.1109/WCNC.2016.7564709","url":null,"abstract":"This paper presents the planar implementation of a two dimensional (2-D) beam steering array antenna with a cascaded 2 × 2 Butler Matrix (BM) as the beamformer. A single layer has been chosen to ensure low cost and ease fabrication. The four input ports of the proposed antenna have the capability of producing four independent directional beam patterns scanning from -18° to 23° at x-y plane and from -20° to 22° at the y-z plane respectively. The radiation efficiency obtained from each of the four ports at the designed frequency are 92.6%, 92.1%, 91.4%, and 87.8% respectively. The maximum antenna gain of 15.1 dBi is obtained at port P1. The proposed antenna has a null free elevation plane and therefore will be suitable for base station application of the proposed fifth generation mobile communications.","PeriodicalId":436094,"journal":{"name":"2016 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"30 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114020948","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 : 2016-04-03DOI: 10.1109/WCNC.2016.7564657
K. N. R. Surya, V. Prasad, V. Bhargava
In this paper, resource allocation for energy-efficient communications in a pilot-contaminated uplink multi-cell massive MIMO system with MRC detectors is investigated. The problem of maximizing energy efficiency (EE) of data transmissions in the system is studied by optimizing the number of antennas per BS, the pilot signal power, and the data signal power. The considered optimization problem takes into account the circuit power consumption, pilot contamination, and budget constraints in the number of antennas per Base Station (BS) and the average transmission power per symbol. The resulting optimization problem has a non-convex fractional objective function which is difficult to solve in its original form. Therefore, principles from fractional programming are used to first transform the problem into an equivalent parametric form and then to derive an iterative resource allocation algorithm. In each iteration, an alternating optimization technique is used to solve the objective function by decomposing it into a sequence of solvable difference of convex (D.C) programming subproblems. Simulation results show that higher EE levels can be achieved by optimizing the pilot and data powers separately. Also, increasing the number of antennas per BS with the power budget may or may not be energy-efficient, depending on the range of operation.
{"title":"Resource optimization for energy efficiency in multi-cell massive MIMO with MRC detectors","authors":"K. N. R. Surya, V. Prasad, V. Bhargava","doi":"10.1109/WCNC.2016.7564657","DOIUrl":"https://doi.org/10.1109/WCNC.2016.7564657","url":null,"abstract":"In this paper, resource allocation for energy-efficient communications in a pilot-contaminated uplink multi-cell massive MIMO system with MRC detectors is investigated. The problem of maximizing energy efficiency (EE) of data transmissions in the system is studied by optimizing the number of antennas per BS, the pilot signal power, and the data signal power. The considered optimization problem takes into account the circuit power consumption, pilot contamination, and budget constraints in the number of antennas per Base Station (BS) and the average transmission power per symbol. The resulting optimization problem has a non-convex fractional objective function which is difficult to solve in its original form. Therefore, principles from fractional programming are used to first transform the problem into an equivalent parametric form and then to derive an iterative resource allocation algorithm. In each iteration, an alternating optimization technique is used to solve the objective function by decomposing it into a sequence of solvable difference of convex (D.C) programming subproblems. Simulation results show that higher EE levels can be achieved by optimizing the pilot and data powers separately. Also, increasing the number of antennas per BS with the power budget may or may not be energy-efficient, depending on the range of operation.","PeriodicalId":436094,"journal":{"name":"2016 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123249046","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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