{"title":"Why are relays not always good for you? Performance of different relay deployment configurations in a heterogeneous network","authors":"Jagadish Ghimire, C. Rosenberg, S. Periyalwar","doi":"10.1109/WIOPT.2014.6850317","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850317","url":null,"abstract":"In this paper, we study three scenarios of small-cell deployment in a heterogeneous network comprising a macro base station (MBS) and a set of small cells. The first scenario corresponds to wired backhauling and the remaining two scenarios correspond to two different ways of wireless backhauling. In one of the scenarios of wireless backhauling, the backhaul links have to compete with the user links for LTE channel resources (user-band relay scenario). In the other, an additional (mmWave) band is available exclusively for operating the backhaul links (dedicated-band relay scenario). For each of the scenarios, several different configurations based on channel allocation and node capabilities are considered. We formulate an optimization framework to model, dimension and evaluate all of these configurations. For user-band relay scenario, our results show that some configurations offer either negative or negligible throughput gains over the MBS-only case. By noting that any relay deployment's performance is upper-bounded by wired backhauling with sufficiently large capacity, the results also show that some other configurations offer very good throughput gains, with values very close to the upper-bound. The results highlight the importance of the right choice of configuration to justify the deployment of user-band relay nodes. Further, our results show that, for dedicated-band relay scenario, a small fraction of a typical mmWave bandwidth suffices to yield performance very close to the upper-bound.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"26 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132331208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Carniato, Federica Fongher, M. Luglio, W. Munarini, C. Roseti, F. Zampognaro
{"title":"Efficient network resources utilization for Ka-band high capacity satellite systems","authors":"L. Carniato, Federica Fongher, M. Luglio, W. Munarini, C. Roseti, F. Zampognaro","doi":"10.1109/WIOPT.2014.6850286","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850286","url":null,"abstract":"An efficient resource allocation is of paramount importance to guarantee the best performance with a fair distribution of satellite capacity, even for Multi-beam High Throughput Satellites (HTS) platforms. These platforms are recently gaining relevance for broadband Internet access and are nowadays able to provide xDSL like services. Although the available bandwidth for HTS is greater than previous platforms, it is still fundamental to use it wisely and avoiding abuses, which may jeopardize the service performance of the installed user-base. This paper focuses on the commercial system using the KA-SAT platform by Eutelsat, where a Deep Packet Inspection (DPI) solution is adopted to allow multi-dimensional per-user and per-application priority. Simulation and emulation tests have been executed to identify both the optimal DPI configuration and the amount of satellite capacity to procure in order to meet user requirements. Test achievements are then used to provide useful inputs for the real platform configuration in the frame of the Lift Off ESA project.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130423562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A novel BWA system based on Time and Frequency domain United processing","authors":"Xin Su, Jie Zeng, Xibin Xu, Limin Xiao","doi":"10.1109/WIOPT.2014.6850287","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850287","url":null,"abstract":"In order to satisfy the demand of future Broadband Wireless Access (BWA) with high mobility, high data rate and low cost, Tsinghua University proposes a novel BWA system named BRadio with independent intellectual property rights. This paper describes the BRadio system from the aspects of physical layer technologies, Medium Access Control (MAC), networking methods, and services. The physical layer technologies focus on Time domain and Frequency domain United Orthogonal Frequency Division Multiple Access (TFU-OFDMA), Time domain and Frequency domain United Single Carrier Modulation time division multiple Access (TFU-SCMA), Interleave Division Multiple Access (IDMA), and Multiple Input Multiple Output (MIMO). In MAC layer we describe several new functionalities in BRadio system. The networking methods of BRadio are divided into networking independently and networking with the existing networks. BRadio can support various services, among which, the Personal Media Service (PMS) is presented in detail. Relying on the technical superiority of its high data rate, high mobility and low cost, as well as its flexible networking and comprehensive service platform, BRadio has become a potential technical solution for BWA.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134188731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A vehicular backbone network (VBN) with joint transportation-wireless capacity utilization","authors":"Bo Tan, J. Jose, Xinzhou Wu, Lei Ying","doi":"10.1109/WIOPT.2014.6850345","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850345","url":null,"abstract":"A vehicular backbone network (VBN) has the potential to augment the Internet with high-throughput data flows for delay-tolerant traffic. High-throughput flows require a joint utilization of transportation capacity for carrying data packets through physical mobility and wireless capacity for switching data packets from one route to another. This paper establishes a model that incorporates both transportation mobility and wireless switching. Then, it characterizes the network capacity based on flow conservation, wireless communication capacity constraints and data storage limits, and solves a convex optimization that results in joint routing and congestion control. A variant with cost minimization reduces delay while maximizing throughput. Next, this paper develops a distributed algorithm that achieves the global objective with limited infrastructure support. Lastly, a packet-level simulation platform using real-world road map and traffic statistics is used to evaluate the distributed algorithm, and demonstrate the significant performance enhancement achieved.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134223113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Interference alignment using variational mean field annealing","authors":"Mihai-Alin Badiu, M. Guillaud, B. Fleury","doi":"10.1109/WIOPT.2014.6850351","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850351","url":null,"abstract":"We study the problem of interference alignment in the multiple-input multiple-output interference channel. Aiming at minimizing the interference leakage power relative to the receiver noise level, we use the deterministic annealing approach to solve the optimization problem. In the corresponding probabilistic formulation, the precoders and the orthonormal bases of the desired signal subspaces are variables distributed on the complex Stiefel manifold. To enable analytically tractable computations, we resort to the variational mean field approximation and thus obtain a novel iterative algorithm for interference alignment. We also show that the iterative leakage minimization algorithm by Gomadam et al. and the alternating minimization algorithm by Peters and Heath, Jr. are instances of our method. Finally, we assess the performance of the proposed algorithm through computer simulations.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131841498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A measurement based study of TCP protocol efficiency in cellular networks","authors":"Johan Garcia, Stefan Alfredsson, A. Brunström","doi":"10.1109/WIOPT.2014.6850290","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850290","url":null,"abstract":"This paper examines the efficiency of resource utilization with respect to short-lived TCP flows in various cellular networks. The examination is done from the vantage point of an end-user who would like to use as much as possible of the cellular transmission resources that are available at any given time, thus minimizing the delays associated with communication. Based on a comprehensive measurement campaign we first derive network characteristics with regards to base RTT, RTT under load, and average throughput. A protocol efficiency metric is introduced to capture how efficiently short TCP flows are in fact able to use the instantaneously available transmission resources in a cellular network. The measurements show that short TCP connections have low efficiency in 3.5G (HSPA+) and 4G (LTE) mobile broadband networks, and that the improved latency and throughput characteristics of 4G in relation to 3.5G nevertheless results in lower short-flow efficiency for 4G.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"152 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131171601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Modeling rewards and incentive mechanisms for Delay Tolerant Networks","authors":"O. Brun, R. E. Azouzi, B. Prabhu, T. Seregina","doi":"10.1109/WIOPT.2014.6850304","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850304","url":null,"abstract":"A central problem in Delay Tolerant Networks (DTNs) is to persuade mobile nodes to participate in relaying messages. Indeed, the delivery of a message incurs a certain number of costs for a relay. We consider a two-hop DTN in which a source node, wanting to get its message across to the destination as fast as possible, promises each relay it meets a reward. This reward is the minimum amount that offsets the expected delivery cost, as estimated by the relay from the information given by the source (number of existing copies of the message, age of these copies). A reward is given only to the relay that is the first one to deliver the message to the destination. For two relays and exponentially distributed inter-contact times, we show that the expected reward the source pays remains the same irrespective of the information it conveys, provided that the type of information does not vary dynamically over time. On the other hand, the source can gain by adapting the information that it conveys to a meeting relay.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115356218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Realistic per-category pricing schemes for LTE users","authors":"A. Belghith, Selem Trabelsi, Bernard A. Cousin","doi":"10.1109/WIOPT.2014.6850329","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850329","url":null,"abstract":"As demand on data access and bandwidth explodes, service providers across cellular network infrastructures are struggling to find effective ways to manage the data traffic on their network, and meet customer expectations without eroding profitability, or attracting regulatory attention. Pricing schemes are designed to offer protable business to the operators as well as to create favorable services for the mobile subscribers. In this paper, we analyze three well-known pricing schemes proposed for Long Term Evolution (LTE) mobile networks. We then propose a realistic per-category pricing (R2P) scheme for LTE. Our pricing scheme takes into account QoS parameters, physical resources blocs utilization, user valuation, and user price categories: Gold, Silver and Bronze. Finally, we show, through extensive simulation results that our proposed pricing scheme provides the higher revenue for the operator.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"194 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114923499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Analytic quantification of outage probability and radiated power of cooperative base stations","authors":"Matthias Herlich","doi":"10.1109/WIOPT.2014.6850365","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850365","url":null,"abstract":"Cooperative transmissions allow fast and reliable communication between user equipment (UE) and base stations (BSs) in radio access networks. Selecting which base stations cooperate is important to keep both effective radiated power (ERP) and outage probability low. In this paper, we quantify how knowledge about the instantaneous channel conditions can be used to select which BSs cooperate. We analytically derive the outage probability and ERP when instantaneous channel knowledge is used for BS selection, power control, both, or not at all. In particular, we quantify the added benefit of instantaneous over average channel knowledge, depending on the differences in average channel gains of the BSs. We determine that the greatest reduction (both in terms of outage probability and ERP) from using instantaneous channel knowledge is achieved when the average channel gains of all possibly cooperating BSs are the same. Additionally, we show that when using instantaneous channel knowledge to select the cooperating BSs, adding power control only makes a difference at a single BS.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124778107","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}
Fei Shen, Eduard Axel Jorswieck, Anil Kumar Chorppath, H. Boche
{"title":"Pricing for distributed resource allocation in MAC without SIC under QoS requirements with malicious users","authors":"Fei Shen, Eduard Axel Jorswieck, Anil Kumar Chorppath, H. Boche","doi":"10.1109/WIOPT.2014.6850346","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850346","url":null,"abstract":"We develop the noncooperative game with individual pricing for the general multiple access channel (MAC) system without successive interference cancellation (SIC). Each user allocates its own power by optimizing the individual utility function with clever price adaptation. We show that by the proposed prices, the best response (BR) power allocation of each user converges rapidly. The individual prices are proposed such that the Shannon rate-based quality-of-service (QoS) requirement of each user is achieved at the unique Nash equilibrium (NE) point. We analyse different behavior types of the users, especially the malicious behavior and the resulting NE power allocation and achievable rates of all the users with malicious users. We illustrate the convergence of the BR dynamic and the Price of Malice (PoM) by numerical simulations.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129825861","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}