Pub Date : 2013-07-03DOI: 10.1109/BlackSeaCom.2013.6623393
S. C. Jha, M. Gupta, A. Koç, R. Vannithamby
Small Cells are under extensive investigation as a potential solution to meet the increasing capacity demand due to ever growing data traffic over cellular networks. The architecture of small cells is still under discussion, various architectures have been proposed based on potential use cases. One of the most important use cases is to deploy small cells on a different frequency than that of the macro cell to offload traffic. Small cell discovery in this type of inter-frequency scenario is an open research problem. Aggressive scanning mechanisms may result in faster discovery of small cells and higher user throughput as well as higher macro cell capacity due to potentially increased offloading opportunity. However, frequent scanning may also result in higher power consumption for the device. Therefore, a tradeoff between offloading opportunity and device power consumption seems inevitable in practice. In this paper, we analyze the trade-off between the offloading capacity and device power consumption due to inter-frequency scanning mechanism for small cell discovery. Our findings show that although increasing the frequency of inter-frequency scanning does result in increased power consumption due to scanning, it actually lowers the total power consumed by the device since it leads to offloading to small cells, where the device consumes less overall power due to better coverage.
{"title":"On the impact of small cell discovery mechanisms on device power consumption over LTE networks","authors":"S. C. Jha, M. Gupta, A. Koç, R. Vannithamby","doi":"10.1109/BlackSeaCom.2013.6623393","DOIUrl":"https://doi.org/10.1109/BlackSeaCom.2013.6623393","url":null,"abstract":"Small Cells are under extensive investigation as a potential solution to meet the increasing capacity demand due to ever growing data traffic over cellular networks. The architecture of small cells is still under discussion, various architectures have been proposed based on potential use cases. One of the most important use cases is to deploy small cells on a different frequency than that of the macro cell to offload traffic. Small cell discovery in this type of inter-frequency scenario is an open research problem. Aggressive scanning mechanisms may result in faster discovery of small cells and higher user throughput as well as higher macro cell capacity due to potentially increased offloading opportunity. However, frequent scanning may also result in higher power consumption for the device. Therefore, a tradeoff between offloading opportunity and device power consumption seems inevitable in practice. In this paper, we analyze the trade-off between the offloading capacity and device power consumption due to inter-frequency scanning mechanism for small cell discovery. Our findings show that although increasing the frequency of inter-frequency scanning does result in increased power consumption due to scanning, it actually lowers the total power consumed by the device since it leads to offloading to small cells, where the device consumes less overall power due to better coverage.","PeriodicalId":170309,"journal":{"name":"2013 First International Black Sea Conference on Communications and Networking (BlackSeaCom)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128975729","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 : 2013-07-03DOI: 10.1109/BlackSeaCom.2013.6623383
I. Llatser, S. Abadal, Albert Mestres, A. Cabellos-Aparicio, E. Alarcón
Graphene-enabled Wireless Communications (GWC) advocate for the use of graphene-based plasmonic antennas, or graphennas, which take advantage of the plasmonic properties of graphene to radiate electromagnetic waves in the terahertz band (0.1-10 THz). GWC may represent a breakthrough in the research areas of wireless on-chip communications, i.e., among the different processors or cores of a chip multiprocessor, and of these cores with the memory system. The main advantages of the resulting Graphene-enabled Wireless Networks on-Chip (GWNoC) are twofold. On the one hand, the potential of GWCto radiate in the terahertz band provides a huge transmission bandwidth, allowing not only the transmission of information at extremely high speeds but also the design of ultra-low-power and low-complexity schemes. On the other hand, the size of graphennas can be greatly reduced with respect to metallic antennas with the same resonant frequency, allowing the integration of graphennas within individual processing cores and the implementation of core-level wireless communication. In addition to these physical layer advantages, GWNoC represent a clear opportunity from the multicore architecture perspective. Due to their native implementation of broadcast and multicast communications, GWNoC will enable not just the alleviation of the latency or power bottlenecks of traditional on-chip networks, but also the devising of novel multicore architectures.
{"title":"Graphene-enabled Wireless Networks-on-Chip","authors":"I. Llatser, S. Abadal, Albert Mestres, A. Cabellos-Aparicio, E. Alarcón","doi":"10.1109/BlackSeaCom.2013.6623383","DOIUrl":"https://doi.org/10.1109/BlackSeaCom.2013.6623383","url":null,"abstract":"Graphene-enabled Wireless Communications (GWC) advocate for the use of graphene-based plasmonic antennas, or graphennas, which take advantage of the plasmonic properties of graphene to radiate electromagnetic waves in the terahertz band (0.1-10 THz). GWC may represent a breakthrough in the research areas of wireless on-chip communications, i.e., among the different processors or cores of a chip multiprocessor, and of these cores with the memory system. The main advantages of the resulting Graphene-enabled Wireless Networks on-Chip (GWNoC) are twofold. On the one hand, the potential of GWCto radiate in the terahertz band provides a huge transmission bandwidth, allowing not only the transmission of information at extremely high speeds but also the design of ultra-low-power and low-complexity schemes. On the other hand, the size of graphennas can be greatly reduced with respect to metallic antennas with the same resonant frequency, allowing the integration of graphennas within individual processing cores and the implementation of core-level wireless communication. In addition to these physical layer advantages, GWNoC represent a clear opportunity from the multicore architecture perspective. Due to their native implementation of broadcast and multicast communications, GWNoC will enable not just the alleviation of the latency or power bottlenecks of traditional on-chip networks, but also the devising of novel multicore architectures.","PeriodicalId":170309,"journal":{"name":"2013 First International Black Sea Conference on Communications and Networking (BlackSeaCom)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134422464","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 : 2013-07-03DOI: 10.1109/BlackSeaCom.2013.6623411
A. Azad, Olivier Beaude, S. Lasaulce, Laurent Pfeiffer
In smart grids, the expected increase of electrical vehicle (EV) penetration will impose sizeable charging load, which can critically overburden the distribution network (DN) if the delivered power is non-pragmatically aggregated and induce significant impacts on various important existing grid assets. Among them, the residential distribution transformer is considered as one of the most important components in the grid. The ageing of the transformer is closely related to the temporal evolution of the hot-spot temperature (HST), which is induced by the operating load level history. We propose an optimal control approach to obtain a new EV charging algorithm: the novel aspect of this algorithm is that it takes inertial behavior of HST into account, which is the key parameter to capture the ageing. Though our formulation closely resembles to the linear quadratic control problem that includes costs induced from the state of the transformer and its present charging load, the natural constraints which are imposed to the instantaneous charging level (saturation constraints) induces intricate complicacy for the analytical solution. Thus, we follow the Pontryagin maximum principle approach to obtain the optimal charging policy and resort to numerical methods to compute the optimal charging trajectory. Numerical results allow us to evaluate and compare the performance of the proposed algorithm with various existing benchmark charging policies.
{"title":"An optimal control approach for EV charging with distribution grid ageing","authors":"A. Azad, Olivier Beaude, S. Lasaulce, Laurent Pfeiffer","doi":"10.1109/BlackSeaCom.2013.6623411","DOIUrl":"https://doi.org/10.1109/BlackSeaCom.2013.6623411","url":null,"abstract":"In smart grids, the expected increase of electrical vehicle (EV) penetration will impose sizeable charging load, which can critically overburden the distribution network (DN) if the delivered power is non-pragmatically aggregated and induce significant impacts on various important existing grid assets. Among them, the residential distribution transformer is considered as one of the most important components in the grid. The ageing of the transformer is closely related to the temporal evolution of the hot-spot temperature (HST), which is induced by the operating load level history. We propose an optimal control approach to obtain a new EV charging algorithm: the novel aspect of this algorithm is that it takes inertial behavior of HST into account, which is the key parameter to capture the ageing. Though our formulation closely resembles to the linear quadratic control problem that includes costs induced from the state of the transformer and its present charging load, the natural constraints which are imposed to the instantaneous charging level (saturation constraints) induces intricate complicacy for the analytical solution. Thus, we follow the Pontryagin maximum principle approach to obtain the optimal charging policy and resort to numerical methods to compute the optimal charging trajectory. Numerical results allow us to evaluate and compare the performance of the proposed algorithm with various existing benchmark charging policies.","PeriodicalId":170309,"journal":{"name":"2013 First International Black Sea Conference on Communications and Networking (BlackSeaCom)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116894514","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 : 2013-07-03DOI: 10.1109/BlackSeaCom.2013.6623384
Vitaly Petrov, S. Balasubramaniam, Y. Koucheryavy, M. Skurnik
In this paper we present a simple coding scheme for communication between nanomachines that utilizes bacteria as information carriers. In particular, we utilize two main properties of bacteria to facilitate communication, which includes their ability to swim within the medium, as well as the mechanism to transfer information between each other through a process known as conjugation. While the conjugation process amplifies the quantity of information to be delivered to the destination, the process of copying the information between the bacteria can terminate prematurely leading to copies of partial messages. In order to enhance message transfer reliability and delivery in a timely manner, in this paper we explore a simple Forward and Reverse coding process for blocks of messages at the source nanomachine. Our simulation work have shown that the combined coding process improves plasmid transfer reliability for bacteria nanonetworks.
{"title":"Forward and reverse coding for bacteria nanonetworks","authors":"Vitaly Petrov, S. Balasubramaniam, Y. Koucheryavy, M. Skurnik","doi":"10.1109/BlackSeaCom.2013.6623384","DOIUrl":"https://doi.org/10.1109/BlackSeaCom.2013.6623384","url":null,"abstract":"In this paper we present a simple coding scheme for communication between nanomachines that utilizes bacteria as information carriers. In particular, we utilize two main properties of bacteria to facilitate communication, which includes their ability to swim within the medium, as well as the mechanism to transfer information between each other through a process known as conjugation. While the conjugation process amplifies the quantity of information to be delivered to the destination, the process of copying the information between the bacteria can terminate prematurely leading to copies of partial messages. In order to enhance message transfer reliability and delivery in a timely manner, in this paper we explore a simple Forward and Reverse coding process for blocks of messages at the source nanomachine. Our simulation work have shown that the combined coding process improves plasmid transfer reliability for bacteria nanonetworks.","PeriodicalId":170309,"journal":{"name":"2013 First International Black Sea Conference on Communications and Networking (BlackSeaCom)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114349620","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 : 2013-07-03DOI: 10.1109/BlackSeaCom.2013.6623396
Y. Sambo, M. Z. Shakir, A. R. Ekti, K. Qaraqe, E. Serpedin, M. Imran
Heterogeneous small-cell networks (HetSNets) are considered as a standard part of the future mobile networks where multiple low-power, low-cost base stations (e.g., femtocells) complement the existing macrocell infrastructure. In this paper, we propose a heterogeneous network where multiple tiers of small-cells are deployed which in turn expand the network coverage and increase the frequency reuse distance without compromising the frequency reuse factor. The resultant network is referred to as K-tier HetSNets, where small-cells are padded between the macrocells such that each of the macrocells in the network employs aggressive frequency reuse scheme, i.e., same set of frequencies is used in each macrocell. It has been shown that the co-channel interference due to neighboring macrocells has been reduced significantly without increasing the frequency reuse factor. The large scale deployment of the small-cells may increase the downlink power consumption of the considered HetSNet. Therefore, we show that the population of small-cells in each of the K-tiers is probabilistically dependent on the traffic load due to active mobile users, such that the small-cells in the network turn on their sleep mode under low and medium traffic load during the day. Several simulation results are included to illustrate the impact of the aggressive frequency reuse scheme and traffic load dependent population of small-cells on the system interference and downlink power consumption of the small-cell base stations.
{"title":"K-tier heterogeneous small-cell networks: Towards balancing the spectrum usage and power consumption with aggressive frequency reuse","authors":"Y. Sambo, M. Z. Shakir, A. R. Ekti, K. Qaraqe, E. Serpedin, M. Imran","doi":"10.1109/BlackSeaCom.2013.6623396","DOIUrl":"https://doi.org/10.1109/BlackSeaCom.2013.6623396","url":null,"abstract":"Heterogeneous small-cell networks (HetSNets) are considered as a standard part of the future mobile networks where multiple low-power, low-cost base stations (e.g., femtocells) complement the existing macrocell infrastructure. In this paper, we propose a heterogeneous network where multiple tiers of small-cells are deployed which in turn expand the network coverage and increase the frequency reuse distance without compromising the frequency reuse factor. The resultant network is referred to as K-tier HetSNets, where small-cells are padded between the macrocells such that each of the macrocells in the network employs aggressive frequency reuse scheme, i.e., same set of frequencies is used in each macrocell. It has been shown that the co-channel interference due to neighboring macrocells has been reduced significantly without increasing the frequency reuse factor. The large scale deployment of the small-cells may increase the downlink power consumption of the considered HetSNet. Therefore, we show that the population of small-cells in each of the K-tiers is probabilistically dependent on the traffic load due to active mobile users, such that the small-cells in the network turn on their sleep mode under low and medium traffic load during the day. Several simulation results are included to illustrate the impact of the aggressive frequency reuse scheme and traffic load dependent population of small-cells on the system interference and downlink power consumption of the small-cell base stations.","PeriodicalId":170309,"journal":{"name":"2013 First International Black Sea Conference on Communications and Networking (BlackSeaCom)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115239363","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 : 2013-07-03DOI: 10.1109/BlackSeaCom.2013.6623398
S. Sharafeddine, Karim A. Jahed, Nadine Abbas, E. Yaacoub, Z. Dawy
Smartphones are evolving at a fast rate in terms of their computational, storage, and communications capabilities. A high-end smartphone is equipped with multiple wireless interfaces with varying bit rates, energy consumption requirements, and coverage ranges. The joint utilization of the existing wireless interfaces facilitates the development of advanced techniques to boost the performance of wireless networks and enhance the experience of mobile users. Among these techniques is device-to-device cooperation where a smartphone receives content from a base station on a given wireless interface and distributes it to other devices in its vicinity via another wireless interface. Another technique is traffic offloading in heterogeneous network scenarios where a smartphone downloads content using multiple wireless interfaces. In this paper, we study the readiness of high-end smartphones to utilize multiple wireless interfaces simultaneously focusing on capabilities and challenges. We adopt an experimental approach using a mobile cooperative video distribution testbed to obtain and evaluate performance results with focus on energy consumption. We consider various scenarios involving a combination of wireless technologies that include Bluetooth, WiFi, WiFi-Direct, and 3G.
{"title":"Exploiting multiple wireless interfaces in smartphones for traffic offloading","authors":"S. Sharafeddine, Karim A. Jahed, Nadine Abbas, E. Yaacoub, Z. Dawy","doi":"10.1109/BlackSeaCom.2013.6623398","DOIUrl":"https://doi.org/10.1109/BlackSeaCom.2013.6623398","url":null,"abstract":"Smartphones are evolving at a fast rate in terms of their computational, storage, and communications capabilities. A high-end smartphone is equipped with multiple wireless interfaces with varying bit rates, energy consumption requirements, and coverage ranges. The joint utilization of the existing wireless interfaces facilitates the development of advanced techniques to boost the performance of wireless networks and enhance the experience of mobile users. Among these techniques is device-to-device cooperation where a smartphone receives content from a base station on a given wireless interface and distributes it to other devices in its vicinity via another wireless interface. Another technique is traffic offloading in heterogeneous network scenarios where a smartphone downloads content using multiple wireless interfaces. In this paper, we study the readiness of high-end smartphones to utilize multiple wireless interfaces simultaneously focusing on capabilities and challenges. We adopt an experimental approach using a mobile cooperative video distribution testbed to obtain and evaluate performance results with focus on energy consumption. We consider various scenarios involving a combination of wireless technologies that include Bluetooth, WiFi, WiFi-Direct, and 3G.","PeriodicalId":170309,"journal":{"name":"2013 First International Black Sea Conference on Communications and Networking (BlackSeaCom)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114448067","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 : 2013-07-03DOI: 10.1109/BlackSeaCom.2013.6623400
Çagatay Edemen, O. Kaya
For a three user cooperative multiple access channel (MAC), we propose a new block Markov superposition encoding strategy, which enables all three users to cooperate collectively as well as in pairs. We obtain the resulting achievable rate expressions and compare them with existing two and three user cooperative strategies. We demonstrate that significant rate gains may be possible, without resorting to adaptive encoding/decoding techniques. We investigate the contributions from pairwise and collective cooperation signals while achieving tuples on the rate region boundary, and compare by simulations the sum rates achievable by two user versus three user grouping in cooperative MACs with fixed total resources.
{"title":"A new block Markov coding strategy for pairwise and collective cooperation in the three user MAC","authors":"Çagatay Edemen, O. Kaya","doi":"10.1109/BlackSeaCom.2013.6623400","DOIUrl":"https://doi.org/10.1109/BlackSeaCom.2013.6623400","url":null,"abstract":"For a three user cooperative multiple access channel (MAC), we propose a new block Markov superposition encoding strategy, which enables all three users to cooperate collectively as well as in pairs. We obtain the resulting achievable rate expressions and compare them with existing two and three user cooperative strategies. We demonstrate that significant rate gains may be possible, without resorting to adaptive encoding/decoding techniques. We investigate the contributions from pairwise and collective cooperation signals while achieving tuples on the rate region boundary, and compare by simulations the sum rates achievable by two user versus three user grouping in cooperative MACs with fixed total resources.","PeriodicalId":170309,"journal":{"name":"2013 First International Black Sea Conference on Communications and Networking (BlackSeaCom)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114669959","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 : 2013-07-03DOI: 10.1109/BlackSeaCom.2013.6623372
Mikko Vehkaperä, Maksym A. Girnyk, T. Riihonen, R. Wichman, L. Rasmussen
High capacity requirements in wireless systems can be met, at the network level, by using dense small cell deployments and, at the link level, by improving spectral efficiency via spectrum reuse. In this context, we consider a small-area radio system, e.g. a pico-or femtocell, where a full-duplex access point serves simultaneously two half-duplex devices, one in downlink and one in uplink direction. All transceivers are equipped with multiple antennas exploited for spatial multiplexing. Instead of limiting the study to the total sum rate, we analyze the complete achievable rate regions of the two directions. We also take into account the effects of mismatched decoding at the receivers due to imperfect knowledge of the transceiver impairments. The analysis is conducted in the large-system limit using the replica method from statistical physics, which allows to encompass arbitrary channel input distributions. The analytical results characterize the effect of self-interference at the access point and inter-device interference on the achievable rate regions. Numerical examples for particular signaling schemes are also given.
{"title":"On achievable rate regions at large-system limit in full-duplex wireless local access","authors":"Mikko Vehkaperä, Maksym A. Girnyk, T. Riihonen, R. Wichman, L. Rasmussen","doi":"10.1109/BlackSeaCom.2013.6623372","DOIUrl":"https://doi.org/10.1109/BlackSeaCom.2013.6623372","url":null,"abstract":"High capacity requirements in wireless systems can be met, at the network level, by using dense small cell deployments and, at the link level, by improving spectral efficiency via spectrum reuse. In this context, we consider a small-area radio system, e.g. a pico-or femtocell, where a full-duplex access point serves simultaneously two half-duplex devices, one in downlink and one in uplink direction. All transceivers are equipped with multiple antennas exploited for spatial multiplexing. Instead of limiting the study to the total sum rate, we analyze the complete achievable rate regions of the two directions. We also take into account the effects of mismatched decoding at the receivers due to imperfect knowledge of the transceiver impairments. The analysis is conducted in the large-system limit using the replica method from statistical physics, which allows to encompass arbitrary channel input distributions. The analytical results characterize the effect of self-interference at the access point and inter-device interference on the achievable rate regions. Numerical examples for particular signaling schemes are also given.","PeriodicalId":170309,"journal":{"name":"2013 First International Black Sea Conference on Communications and Networking (BlackSeaCom)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127172535","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 : 2013-07-03DOI: 10.1109/BlackSeaCom.2013.6623409
A. Sridharan, C. E. Koksal
Network devices are often required to meet long term average energy constraints due to battery or energy cost considerations. In this paper, we design a simple greedy link scheduling policy for networks in which every transmitter node has an associated long term-average energy constraint. We show that a policy that greedily switches the transmitter node off is sufficient to yield a good throughput performance by characterizing its performance using the Local Pooling Factor (LPF), a parameter previously used to characterize the performance of Greedy Maximal Scheduling (GMS) in wireless networks. We then demonstrate via numerical experiments that for a network in which links originally use a fixed transmit power, a joint greedy scheduling and power control policy that uses two transmit power levels consumes lesser average transmit power compared to Greedy Maximal Scheduling (GMS), while exhibiting similar throughput performance as that of GMS. Through these results, we establish how greedy scheduling can be combined with power control to obtain provable throughput performance guarantees, while also satisfying long term average power constraints in wireless networks.
由于电池或能源成本的考虑，网络设备通常需要满足长期的平均能量限制。在本文中，我们设计了一个简单的贪婪链路调度策略，其中每个发送节点都有一个相关联的长期平均能量约束。通过使用本地池化因子(Local Pooling Factor, LPF)来表征其性能，我们证明了贪婪关闭发送节点的策略足以产生良好的吞吐量性能，LPF是以前用于表征无线网络中贪婪最大调度(Greedy maximum Scheduling, GMS)性能的参数。然后，我们通过数值实验证明，对于链路最初使用固定发射功率的网络，使用两个发射功率水平的联合贪婪调度和功率控制策略与贪婪最大调度(GMS)相比消耗更少的平均发射功率，同时表现出与GMS相似的吞吐量性能。通过这些结果，我们建立了贪婪调度如何与功率控制相结合，以获得可证明的吞吐量性能保证，同时满足无线网络中的长期平均功率约束。
{"title":"Energy efficient greedy link scheduling in wireless networks","authors":"A. Sridharan, C. E. Koksal","doi":"10.1109/BlackSeaCom.2013.6623409","DOIUrl":"https://doi.org/10.1109/BlackSeaCom.2013.6623409","url":null,"abstract":"Network devices are often required to meet long term average energy constraints due to battery or energy cost considerations. In this paper, we design a simple greedy link scheduling policy for networks in which every transmitter node has an associated long term-average energy constraint. We show that a policy that greedily switches the transmitter node off is sufficient to yield a good throughput performance by characterizing its performance using the Local Pooling Factor (LPF), a parameter previously used to characterize the performance of Greedy Maximal Scheduling (GMS) in wireless networks. We then demonstrate via numerical experiments that for a network in which links originally use a fixed transmit power, a joint greedy scheduling and power control policy that uses two transmit power levels consumes lesser average transmit power compared to Greedy Maximal Scheduling (GMS), while exhibiting similar throughput performance as that of GMS. Through these results, we establish how greedy scheduling can be combined with power control to obtain provable throughput performance guarantees, while also satisfying long term average power constraints in wireless networks.","PeriodicalId":170309,"journal":{"name":"2013 First International Black Sea Conference on Communications and Networking (BlackSeaCom)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130494483","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 : 2013-07-03DOI: 10.1109/BlackSeaCom.2013.6623390
S. C. Jha, A. Koç, M. Gupta, R. Vannithamby
Machine to Machine (M2M) communication is expected to be a major driver of growth in mobile communications for cellular networks such as LTE. Since LTE networks are primarily designed and optimized for human to human (H2H) communications, existing protocols and mechanisms are not very efficient for supporting M2M communication. Several modifications are needed to address the service requirements and traffic characteristics of M2M devices in these networks. Device power efficiency is one of the crucial requirements for M2M communication. We focus on solutions to decrease power consumption of M2M devices over 4G networks. M2M traffic characteristics are different from those of H2H traffic in terms of the size and the frequency of the generated data. One possible mechanism is to maximize the time that the M2M device is in low power state. In this paper, we evaluate the impact of extending the Paging Cycle and reducing the RRC Connected-to-Idle transition tail time on power savings. Our results show that for infrequent data transmission extending Paging Cycle reduces power consumption up to 79.3%. However, for frequent data transmission reducing Connected-to-Idle transition tail time is more effective and reduces power consumption by up to 76.2%.
{"title":"Power Saving mechanisms for M2M communication over LTE networks","authors":"S. C. Jha, A. Koç, M. Gupta, R. Vannithamby","doi":"10.1109/BlackSeaCom.2013.6623390","DOIUrl":"https://doi.org/10.1109/BlackSeaCom.2013.6623390","url":null,"abstract":"Machine to Machine (M2M) communication is expected to be a major driver of growth in mobile communications for cellular networks such as LTE. Since LTE networks are primarily designed and optimized for human to human (H2H) communications, existing protocols and mechanisms are not very efficient for supporting M2M communication. Several modifications are needed to address the service requirements and traffic characteristics of M2M devices in these networks. Device power efficiency is one of the crucial requirements for M2M communication. We focus on solutions to decrease power consumption of M2M devices over 4G networks. M2M traffic characteristics are different from those of H2H traffic in terms of the size and the frequency of the generated data. One possible mechanism is to maximize the time that the M2M device is in low power state. In this paper, we evaluate the impact of extending the Paging Cycle and reducing the RRC Connected-to-Idle transition tail time on power savings. Our results show that for infrequent data transmission extending Paging Cycle reduces power consumption up to 79.3%. However, for frequent data transmission reducing Connected-to-Idle transition tail time is more effective and reduces power consumption by up to 76.2%.","PeriodicalId":170309,"journal":{"name":"2013 First International Black Sea Conference on Communications and Networking (BlackSeaCom)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125707373","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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