radio resource management in cellular systems free ebook

... ra- dio networks involving hybrid networking and access tech- nologies are envisioned in 3G+ systems. In such systems, radio resource management (RRM) plays a major role in the provision of QoS ... research inter- ests are in the area of radio resource management techniques and MAC and signaling layer protocols for high-speed wireless-access networks using OFDMA/CDMA technologies including 3G ... interests are in general wireless communication, mobile networks, and system per- formance analysis; and in particular QoS-aware radio resource management, joint study of wireless physical/link...

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 01/01/2014, 18:47

... RRC (radio resource controller) is located. A RRA collects information on radio resources and supervises the MAC and PHY functions including power control. A RRC collects radio resource information ... between neighboring BSs within the network. We use RRM to refer to both radio resource management and radio resource managers. If dynamic FFR is deployed in the system, designated neighboring BSs of ... neighboring cell at a particular cell-edge user, the two BSs (serving BS as well as the dominant interfering BS) are coordinated such that the dominant neighboring BS will not use a certain quantity...

Ngày tải lên: 21/06/2014, 11:20

... A, 3 km/h selective combining and increasing the number of received radio links provides reduction in the transmitted power in- dependently of the combining technique. In Figure 8, for the reference ... combining concept consists of re- ceiving redundantly the same information bearing signal over two or more fading channels, and combine these mul- tiple replicas at the receiver in order to increase ... combining (SC) and maxi- mal ratio combining (MRC). 4.1. Selective combining Figure 4 shows a scheme of how selective combining oper- ates at the receiver side. With SC the path/branch yielding the...

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 05/09/2013, 14:58

... found in the “Managing Resource Pools” section of the vSphere Resource Management Guide [2]. Understanding Memory Resource Management in VMware® ESX™ Server W H I T E P A P E R VMware, Inc. ... guest operating system running inside the SPECjbb, kernel compile, and Swingbench virtual machines was 64-bit Red Hat EnterpriseLinux5.2Server.TheguestoperatingsystemrunninginsidetheExchangevirtualmachinewasWindowsServer2008. ... only) Fromthisgure,itisseenthatwhenthevirtualmachinememorylimitdecreasesbeyond2816MB,thethroughputofSPECjbb degradessignicantly in bothballooningandswappingcases.Whenthememorylimitisreducedto2048MB,thethroughputlosses are89percentand96percentforballooningandswappingrespectively.SincetheconguredJVMheapsizeis2.5GB,theactual virtualmachineworkingsetsizeisaround2.5GBplusguestoperatingsystemmemoryusage(about300MB).Whenthevirtual machinememorylimitfallsbelow2816MB,thehostmemorycannotbacktheentirevirtualmachine’sworkingset,sothatvirtual machinestartstosuerfromguest-levelpaging in theballooningcasesorhypervisorswapping in theswappingcases. Since SPECjbb is an extremely memory intensive workload, its throughput is largely determined by the virtual machine memory hit rate. In this instance, virtual...

Ngày tải lên: 17/03/2014, 15:20

Ngày tải lên: 24/03/2014, 00:21

... Samarati ,323 Preserving Privacy in On-line Analytical Processing Data Cubes Lingyu Wang, Sushi1 Jajodia, Duminda Wijesekera ,355 Part V Security in Emerging Data Services Search on ... Trusted Operating Systems There are many commercial (untrusted) operating systems, e.g., MS-DOS and the original Unix operating system, that do not have a well-defined structure. In MS- DOS, ... implemented using only those operations that are provided by lower layers. Secure Data Management in Decentralized Systems Secure Data Management in Decentralized Systems edited by Ting Yu...

Ngày tải lên: 25/03/2014, 12:06

... Activities 2.1. 2.2. Unlicensed Band Licensed Band 3. Inter-Domain Radio Resource Management 3.1. 3.2. 3.3. Radio Resource Broker Concept Resource Usage Optimization Radio Resource Redistribution 4. Workload Characterization 4.1. 4.2. Measurement Empirical ... existing, policing can be removed from the data path, giving reduced latency and complexity [42]. (ii) Packet classifying, queueing and scheduling Packet classifying, queueing and scheduling are ... shaping, policing, pricing, packet classifying, queueing and scheduling. In mobile and wireless environments, error control and ah hoc routing are also very important issues. (i) Traffic shaping,...

Ngày tải lên: 01/06/2014, 12:51

... immunization including inadequate financing, poor vaccine quality, poor vaccination prac- tices, and weak health care systems [7] but one of the most common general barriers to improving immunization rates ... issues as well as train- ing programs at the local levels to enhance human resource management capacity. Issues relating to financial constraints, infrastructure and poor working environment must ... for human resource management in the health facilities. The doctor is appointed by the head of the policlinic, and the head of the policlinic is appointed by the Ministry of Property Management. ...

Ngày tải lên: 18/06/2014, 17:20

... declining with increasing of visited number n(s, a), and tempera- ture T s negative exponential declining with increasing of visited number n(s), where n s =  a∈A n s,a . 3.3. Fast resource management: ... resource management. In addition, large density of femtocells deployment can also bring a gain of improved joint fast resource management. Here, we only consider the downlink transmission. In the ... Frequency reuse techniques for attaining both coverage and high spectral efficiency in ofdma cellular systems, in WCNC 2010 11. R Sutton, A Barto, Reinforcement Learning: An Introduction (MIT Press, 1998) 12....

Ngày tải lên: 20/06/2014, 22:20

... interfering channels are still NLOS. Also, RSs within the studied cell can be scheduled to minimize co-channel interference. Interfering RSs in other cells, uncoordinated with transmissions in ... transmit beamforming methods. Also, the use of MH relaying shortens the hop distances, which increases the SINR. So although scattering is reduced, SINR is increased. Increasing the SINR pro- vides ... is slightly beneficial since the increase in SINR afforded by shorten- ing the hop distances increases the MIMO gain. In Figure 8b, with spatial reuse, R Net continuously increases with the number...

Ngày tải lên: 21/06/2014, 01:20

... each link, T m (i), observed in the ith frame. The interference channel gains g nm,k from the transmitting node of link n to the receiving node of link m are estimated from the IA message. In order ... impact of transmission on link n using resource k to the other cell links, we need to first determine the interference contribution from the links in L s to other cell links. T his is denoted by ... optimal, taking the instantaneous state of all links into account. In practice, not all the interference messages will be heard. Then the decisions will take only local information into account in the...

Ngày tải lên: 21/06/2014, 05:20

... power interfering due to shadowing effects In this section, we investigate the impact of nonequal in- terfering powers caused by shadowing on the optimal an- tenna spacings. This amounts to include ... will bring in- sight into the structure of the optimal array, which can be to some extent generalized to a mobile scenario. In fact, in mo- bile systems or in case the position of users and interferers ... spacings; similar results can be attained by analyzing the interference power (not shown here). 6. CONCLUSION In this paper, we tackled the problem of optimal design of linear arrays in a cellular...

Ngày tải lên: 22/06/2014, 19:20

... loading strategies in OFDM-based transmission systems, ” in Proceedings of the 17th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC ’06), pp. 1–5, Helsinki, ... water-filling procedure. We prove that the algorithm is efficient in any time- dispersive channel starting with some transmit SNR value. It is interesting that in a truncated radio channel suggested in ... Cioffi,“DualQosload- ing algorithms for multicarrier systems offering different CBR services,” in Proceedings of the 9th IEEE International Sympo- sium on Personal, Indoor and Mobile Radio Communications (PIMRC...

Ngày tải lên: 22/06/2014, 19:20

... energy management in embedded systems, ” Computing & Control Engineering, vol. 14, no. 5, pp. 36–40, 2003. [8] E Y. Chung, L. Benini, and G. de Micheli, “Dynamic power management using adaptive ... Reinforcement Learning Scheme for D ynamic Power Management in Embedded Systems Viswanathan Lakshmi Prabha 1 and Elwin Chandra Monie 2 1 Department of Electronics and Communication Engineering, ... G. Barto, Reinforcement Learning: An In- troduction, MIT Press, Cambridge, UK, 1998. [10] C. H. C. Ribeiro, “A tutorial on reinforcement learning tech- niques,” in Proceedings of International...

Ngày tải lên: 22/06/2014, 19:20

... transmitted power during the K probings. Inserting (43) into (42), we obtain that in the case of us- ing optimal orthogonal weighting matrices, the expression for optimal weighting coefficients can ... their linear combining is developed and studied. Keywords and phrases: antenna array, downlink channel, channel estimation, training sequence. 1. INTRODUCTION In recent years, transmit beamforming ... their linear combining is proposed using the so-called best linear unbiased estima- tion (BLUE) approach. The effect of such a combining on the performance of downlink channel estimation is investi- gated. Downlink...

Ngày tải lên: 23/06/2014, 01:20

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Ngày tải lên: 28/06/2014, 00:20

Ngày tải lên: 28/06/2014, 22:20