Pub Date : 2012-04-01DOI: 10.1109/WCNCW.2012.6215473
Rizwan Ghaffar, P. Ho, U. Salim, Bin Wu
In this paper, we consider femtocell networks and focus on interference mitigation in a novel framework referred to as FemtoWoC architecture (Wireless over Cable architecture for femtocells) [1]. This framework enables centralized processing (joint decoding) of multiple femto base stations at a central place termed as femto control station (FCS). The full blown up maximum likelihood centralized decoding at FCS will go beyond any acceptable limits. This paper proposes a novel dual-stage receiver architecture which achieves the tradeoff of centralized processing (joint decoding) and complexity. The basic idea is two folds, i.e. using some linear processing to reduce the dimension of the femtocell system followed by some nonlinear processing to exploit dominant interferences. The resultant multi-stage receiver is characterized by the performance closer to that of an optimal receiver but with much less complexity.
{"title":"Femtocell networks: Breaking the complexity of centralized processing with novel dual-stage receivers","authors":"Rizwan Ghaffar, P. Ho, U. Salim, Bin Wu","doi":"10.1109/WCNCW.2012.6215473","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215473","url":null,"abstract":"In this paper, we consider femtocell networks and focus on interference mitigation in a novel framework referred to as FemtoWoC architecture (Wireless over Cable architecture for femtocells) [1]. This framework enables centralized processing (joint decoding) of multiple femto base stations at a central place termed as femto control station (FCS). The full blown up maximum likelihood centralized decoding at FCS will go beyond any acceptable limits. This paper proposes a novel dual-stage receiver architecture which achieves the tradeoff of centralized processing (joint decoding) and complexity. The basic idea is two folds, i.e. using some linear processing to reduce the dimension of the femtocell system followed by some nonlinear processing to exploit dominant interferences. The resultant multi-stage receiver is characterized by the performance closer to that of an optimal receiver but with much less complexity.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124943499","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 : 2012-04-01DOI: 10.1109/WCNCW.2012.6215549
E. Pateromichelakis, M. Shariat, A. Quddus, R. Tafazolli
This paper proposes a dynamic semi-centralized resource partitioning algorithm to mitigate the problem of co-tier interference in dense femtocell deployments. This algorithm incorporates graph-colouring and network utility concepts to address inter-cell interference in femtocell networks. The aforementioned scheme acts as a multi-cell coordination mechanism on top of intra-cell scheduling by applying a low complexity graph-based algorithm. The objective of the coordination mechanism is the efficient management of resource conflicts due to interference in a multi-cell environment consisting of femtocells. This coordination mechanism defines a novel category of graph-based ICIC algorithms that uses bipartite graph colouring to avoid resource conflicts by randomizing them in time domain.
{"title":"Dynamic graph-based multi-cell scheduling for femtocell networks","authors":"E. Pateromichelakis, M. Shariat, A. Quddus, R. Tafazolli","doi":"10.1109/WCNCW.2012.6215549","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215549","url":null,"abstract":"This paper proposes a dynamic semi-centralized resource partitioning algorithm to mitigate the problem of co-tier interference in dense femtocell deployments. This algorithm incorporates graph-colouring and network utility concepts to address inter-cell interference in femtocell networks. The aforementioned scheme acts as a multi-cell coordination mechanism on top of intra-cell scheduling by applying a low complexity graph-based algorithm. The objective of the coordination mechanism is the efficient management of resource conflicts due to interference in a multi-cell environment consisting of femtocells. This coordination mechanism defines a novel category of graph-based ICIC algorithms that uses bipartite graph colouring to avoid resource conflicts by randomizing them in time domain.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123571783","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 : 2012-04-01DOI: 10.1109/WCNCW.2012.6215494
O. Bergmann, Stefanie Gerdes, S. Schafer, Florian Junge, C. Bormann
In today's world of home automation, smart objects are interconnected and participate in the Internet of Things. Being part of a very sensible eco-system, these entities must be secured against various kinds of attacks. Smart home appliances such as light bulbs or window shutters have very low processing power and networking capacities and more often than not lack of input/output devices such as keyboards or displays. Therefore, special protocols have been developed to enable lightweight and secure communication. Yet, the secure configuration of new nodes in a network has not been solved satisfactory. In this paper we present a three-phase protocol to bootstrap constrained devices in a wireless sensor network based on IPv6 and the Constrained Application Protocol (CoAP). The protocol phases include service discovery, distribution of security credentials, and application-specific node configuration.
{"title":"Secure bootstrapping of nodes in a CoAP network","authors":"O. Bergmann, Stefanie Gerdes, S. Schafer, Florian Junge, C. Bormann","doi":"10.1109/WCNCW.2012.6215494","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215494","url":null,"abstract":"In today's world of home automation, smart objects are interconnected and participate in the Internet of Things. Being part of a very sensible eco-system, these entities must be secured against various kinds of attacks. Smart home appliances such as light bulbs or window shutters have very low processing power and networking capacities and more often than not lack of input/output devices such as keyboards or displays. Therefore, special protocols have been developed to enable lightweight and secure communication. Yet, the secure configuration of new nodes in a network has not been solved satisfactory. In this paper we present a three-phase protocol to bootstrap constrained devices in a wireless sensor network based on IPv6 and the Constrained Application Protocol (CoAP). The protocol phases include service discovery, distribution of security credentials, and application-specific node configuration.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116528117","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 : 2012-04-01DOI: 10.1109/WCNCW.2012.6215513
Du Yang, S. Mumtaz, J. Bastos, Jonathan Rodriguez
The optimization of fixed relay nodes' location relies on the demanded teletraffic distribution. However, the conventional measurement scheme conducted at the base station can not provide the demanded teletraffic in a sufficient small area, and the alternative modelling scheme only provides approximated results. Taking the advantage of the emerging technologies including the intelligent mobile terminal, the location navigation technology and the location-based services, we propose a new teletraffic measurement scheme, which employs mobile terminals to collect their own information and then constructs a database recording every mobile terminal's mobility pattern and communication pattern. We exemplify the proposed scheme using simulations, which employs such a database to derive the demanded teletraffic so as to optimize the relay nodes' locations with the purpose of minimizing the total required bandwidth.
{"title":"A location-aided teletraffic measurement scheme for optimizing the locations of fixed relay nodes","authors":"Du Yang, S. Mumtaz, J. Bastos, Jonathan Rodriguez","doi":"10.1109/WCNCW.2012.6215513","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215513","url":null,"abstract":"The optimization of fixed relay nodes' location relies on the demanded teletraffic distribution. However, the conventional measurement scheme conducted at the base station can not provide the demanded teletraffic in a sufficient small area, and the alternative modelling scheme only provides approximated results. Taking the advantage of the emerging technologies including the intelligent mobile terminal, the location navigation technology and the location-based services, we propose a new teletraffic measurement scheme, which employs mobile terminals to collect their own information and then constructs a database recording every mobile terminal's mobility pattern and communication pattern. We exemplify the proposed scheme using simulations, which employs such a database to derive the demanded teletraffic so as to optimize the relay nodes' locations with the purpose of minimizing the total required bandwidth.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122428083","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 : 2012-04-01DOI: 10.1109/WCNCW.2012.6215481
Roberto Quilez, N. Mitton, M. Amorim, Nicolas Pauvre
The Object Naming System (ONS) is a central lookup service used in the EPCglobal network for retrieving location information about a specific Electronic Product Code (EPC). This centralized solution lacks scalability and fault tolerance and encounters some political issues. We present the design principles of a fully-distributed multi-root solution for ONS lookup service. In distributed systems, the problem of providing a scalable location service requires a dynamic mechanism to associate identification and location. We design, prototype, and evaluate PRONS, a solution based in a distributed hash table (DHT) for the multi-root problem. We show that PRONS achieves significant performance levels while respecting a number of neutrality requirements.
{"title":"Prototyping a multi-root ONS","authors":"Roberto Quilez, N. Mitton, M. Amorim, Nicolas Pauvre","doi":"10.1109/WCNCW.2012.6215481","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215481","url":null,"abstract":"The Object Naming System (ONS) is a central lookup service used in the EPCglobal network for retrieving location information about a specific Electronic Product Code (EPC). This centralized solution lacks scalability and fault tolerance and encounters some political issues. We present the design principles of a fully-distributed multi-root solution for ONS lookup service. In distributed systems, the problem of providing a scalable location service requires a dynamic mechanism to associate identification and location. We design, prototype, and evaluate PRONS, a solution based in a distributed hash table (DHT) for the multi-root problem. We show that PRONS achieves significant performance levels while respecting a number of neutrality requirements.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121847914","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 : 2012-04-01DOI: 10.1109/WCNCW.2012.6215515
C. Wright, Z. Marantz, P. Orenstein
This paper reviews a range of problems in the road transport field and the potential role of vehicular ad-hoc network systems (VANETs) in helping to solve them. In reality, the communications requirements vary widely from one application to the next, in terms of range, latency, and connectivity together with vehicle and roadside hardware. Based on the nature of the wireless channel, this presents some challenges for communication to security. The paper concludes with a summary of the current state of VANET technology and presents a summary of the challenges to be found in each approach.
{"title":"Getting the message about road safety","authors":"C. Wright, Z. Marantz, P. Orenstein","doi":"10.1109/WCNCW.2012.6215515","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215515","url":null,"abstract":"This paper reviews a range of problems in the road transport field and the potential role of vehicular ad-hoc network systems (VANETs) in helping to solve them. In reality, the communications requirements vary widely from one application to the next, in terms of range, latency, and connectivity together with vehicle and roadside hardware. Based on the nature of the wireless channel, this presents some challenges for communication to security. The paper concludes with a summary of the current state of VANET technology and presents a summary of the challenges to be found in each approach.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"30 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125807337","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 : 2012-04-01DOI: 10.1109/WCNCW.2012.6215517
C. Borgiattino, C. Casetti, C. Chiasserini, N. D. Maio, A. Ghittino, M. Reineri
Vehicular networks are expected to support both safety and non-safety applications, through Dedicated Short Range Communications (DSRC) in 5-GHz bands. These channels, however, are of limited capacity and recent studies have high-lighted their scarcity, in comparison to the broad range of services that are envisioned in vehicular networks. We therefore explore the benefit of using UHF bands for the transmission of control messages, so as to acquire more capacity. Specifically, we focus on content downloading, and design a protocol that leverages the UHF band for control messages and the high-throughput, 5-GHz bands for data delivery. We develop a testbed to quantify the performance of our approach, and show a 3x throughput gain in content delivery with respect to the case where only 5-GHz bands are used.
{"title":"Experiences with UHF bands for content downloading in vehicular networks","authors":"C. Borgiattino, C. Casetti, C. Chiasserini, N. D. Maio, A. Ghittino, M. Reineri","doi":"10.1109/WCNCW.2012.6215517","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215517","url":null,"abstract":"Vehicular networks are expected to support both safety and non-safety applications, through Dedicated Short Range Communications (DSRC) in 5-GHz bands. These channels, however, are of limited capacity and recent studies have high-lighted their scarcity, in comparison to the broad range of services that are envisioned in vehicular networks. We therefore explore the benefit of using UHF bands for the transmission of control messages, so as to acquire more capacity. Specifically, we focus on content downloading, and design a protocol that leverages the UHF band for control messages and the high-throughput, 5-GHz bands for data delivery. We develop a testbed to quantify the performance of our approach, and show a 3x throughput gain in content delivery with respect to the case where only 5-GHz bands are used.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122261004","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 : 2012-04-01DOI: 10.1109/WCNCW.2012.6215505
Yohan Lejosne, D. Slock, Y. Yuan-Wu
We consider the Broadcast Channel (BC), or in other words the multi-user (MU) downlink in a cell with a base station equipped with multiple antennas and mobile terminals equipped with a single antenna (MU-MISO case). It is well-known that user selection not only leads to multi-user diversity but also to decreased suboptimality of simple beamforming (BF) techniques compared to optimal Dirty Paper Coding (DPC) approaches. User selection by exhaustive search can be simplified to greedy approaches, in which one user gets added at a time. We review DPC-style and BF-style greedy user selection (GUS), which are developed with DPC or BF transmitters in mind. We introduce a new interpretation of the BF-style user selection criterion, which corresponds to a new approximate criterion that becomes more accurate for a large user pool. This new criterion allows interpretation and comparison of the respective roles of channel strength and orthogonality in DPC-style and BF-style selection.
{"title":"On greedy stream selection in MIMO BC","authors":"Yohan Lejosne, D. Slock, Y. Yuan-Wu","doi":"10.1109/WCNCW.2012.6215505","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215505","url":null,"abstract":"We consider the Broadcast Channel (BC), or in other words the multi-user (MU) downlink in a cell with a base station equipped with multiple antennas and mobile terminals equipped with a single antenna (MU-MISO case). It is well-known that user selection not only leads to multi-user diversity but also to decreased suboptimality of simple beamforming (BF) techniques compared to optimal Dirty Paper Coding (DPC) approaches. User selection by exhaustive search can be simplified to greedy approaches, in which one user gets added at a time. We review DPC-style and BF-style greedy user selection (GUS), which are developed with DPC or BF transmitters in mind. We introduce a new interpretation of the BF-style user selection criterion, which corresponds to a new approximate criterion that becomes more accurate for a large user pool. This new criterion allows interpretation and comparison of the respective roles of channel strength and orthogonality in DPC-style and BF-style selection.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130231334","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 : 2012-04-01DOI: 10.1109/WCNCW.2012.6215547
G. Costa, A. Cattoni, I. Kovács, P. Mogensen
The traffic in cellular networks has been growing at an accelerated rate. In order to meet the rising demand for large data volumes, shrinking the cell size may be the only viable option. In fact, locally deployed small cells, namely picocells and femtocells, will certainly play a major role in meeting the IMT-Advanced requirements for the next generation of cellular networks. Notwithstanding, several aspects of femtocell deployment are very challenging, especially in closed subscriber group femtocells: massive deployment, user definition of access point location and high density. When such characteristics are combined the traditional network planning and optimization of cellular networks fails to be cost effective. Therefore, a greater deal of automation is needed in femtocells. In particular, this paper proposes a novel method for autonomous selection of spectrum/ channels in femtocells. This method effectively mitigates cotier interference with no signaling at all across different femtocells. Still, the method has a remarkable simple implementation. The efficiency of the proposed method was evaluated by system level simulations. The results show large throughput gains for the cells with unfavorable geometry, up to nearly 300% when compared to the unmanaged situation (reuse 1).
{"title":"A fully distributed method for dynamic spectrum sharing in femtocells","authors":"G. Costa, A. Cattoni, I. Kovács, P. Mogensen","doi":"10.1109/WCNCW.2012.6215547","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215547","url":null,"abstract":"The traffic in cellular networks has been growing at an accelerated rate. In order to meet the rising demand for large data volumes, shrinking the cell size may be the only viable option. In fact, locally deployed small cells, namely picocells and femtocells, will certainly play a major role in meeting the IMT-Advanced requirements for the next generation of cellular networks. Notwithstanding, several aspects of femtocell deployment are very challenging, especially in closed subscriber group femtocells: massive deployment, user definition of access point location and high density. When such characteristics are combined the traditional network planning and optimization of cellular networks fails to be cost effective. Therefore, a greater deal of automation is needed in femtocells. In particular, this paper proposes a novel method for autonomous selection of spectrum/ channels in femtocells. This method effectively mitigates cotier interference with no signaling at all across different femtocells. Still, the method has a remarkable simple implementation. The efficiency of the proposed method was evaluated by system level simulations. The results show large throughput gains for the cells with unfavorable geometry, up to nearly 300% when compared to the unmanaged situation (reuse 1).","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132882947","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 : 2012-04-01DOI: 10.1109/WCNCW.2012.6215470
A. Imran, M. Bennis, L. Giupponi
In this paper, we present the use of several Biomimetic approaches for Self Organization (SO) in heterogeneous scenarios where macrocell and femtocell networks coexist. Mainly these approaches are categorized in indirect biomimetics and direct biomimetics. Under indirect biomimetics we discuss 1) emerging paradigms in learning theory and 2) game theory for their potential to enable SO solutions in heterogeneous networks. By means of numerical results we demonstrate the pros and cons of these indirect biomimetic approaches for designing SO in macro-femto coexistence scenarios. Furthermore, we demonstrate the use of direct biomimetic approaches for designing SO by exploiting one to one mapping between a natural SO system and our system model for heterogeneous networks based on Outdoor Fixed Relays (OFR). Numerical results show that the proposed analytical solution can enhance wireless backhaul capacity of the OFR based femtocells by adapting the macro base station (BS) antenna tilts in a distributed and self organizing manner.
{"title":"Use of learning, game theory and optimization as biomimetic approaches for Self-Organization in macro-femtocell coexistence","authors":"A. Imran, M. Bennis, L. Giupponi","doi":"10.1109/WCNCW.2012.6215470","DOIUrl":"https://doi.org/10.1109/WCNCW.2012.6215470","url":null,"abstract":"In this paper, we present the use of several Biomimetic approaches for Self Organization (SO) in heterogeneous scenarios where macrocell and femtocell networks coexist. Mainly these approaches are categorized in indirect biomimetics and direct biomimetics. Under indirect biomimetics we discuss 1) emerging paradigms in learning theory and 2) game theory for their potential to enable SO solutions in heterogeneous networks. By means of numerical results we demonstrate the pros and cons of these indirect biomimetic approaches for designing SO in macro-femto coexistence scenarios. Furthermore, we demonstrate the use of direct biomimetic approaches for designing SO by exploiting one to one mapping between a natural SO system and our system model for heterogeneous networks based on Outdoor Fixed Relays (OFR). Numerical results show that the proposed analytical solution can enhance wireless backhaul capacity of the OFR based femtocells by adapting the macro base station (BS) antenna tilts in a distributed and self organizing manner.","PeriodicalId":392329,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124217997","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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