2dynamic bandwidth and resource allocation

Ngày tải lên: 03/06/2014, 02:16

... initial bandwidth, UGS, rtPS, nrtPS and BE, based on the requested bandwidth of UGS, the required minimum bandwidth of rtPS and nrtPS and the queue length of BE service respectively If remaining bandwidth ... Quality of Service and Resource Allocation in WiMAX, Edited by Roberto C Hincapie and Javier E Sierra p cm 978-953-307-956-1 Contents Preface IX Part Scheduling and Resource Allocation Algorithms ... overall bandwidth allocation The EDF scheduling algorithm is used for SSs of ertPS and rtPS classes The WFQ algorithm is used for SSs of nrtPS class and FIFO is used for SSs of BE class The bandwidth...

Ngày tải lên: 21/06/2014, 05:20

... algorithm, i.e., 97 Scheduling Algorithm and Bandwidth Allocation in WiMAX fixed allocation for UGS, EDF for rtVR, WFQ for nrtVR, and equal division of remaining bandwidth for BE Although EDF takes ... have different and sometimes conflicting requirements UGS services must always have their delay and bandwidth commitment met, so simply reserving enough bandwidth for those services and controlling ... Downlink Resource Allocation and Frequency Reuse Schemes for WiMAX Networks Downlink Resource Allocation and Frequency Reuse Schemes for WiMAX Networks 109 Frequency reuse schemes and the frequency...

Ngày tải lên: 21/06/2014, 05:20

... orthogonality constraint and to (8) and PO,k ( Rk ) ≤ k (21) Downlink Resource Allocation and Frequency Reuse Schemes for WiMAX Networks Downlink Resource Allocation and Frequency Reuse Schemes ... kilometers between the BS and the user The signal bandwidth B is equal to MHz and the thermal noise power spectral density is equal to N0 = −170 dBm/Hz Downlink Resource Allocation and Frequency Reuse ... bandwidth B (Hz) occupied by the system tend to infinity such that the ratio B/K remain constant Downlink Resource Allocation and Frequency Reuse Schemes for WiMAX Networks Downlink Resource Allocation...

Ngày tải lên: 21/06/2014, 05:20

... the operation of this step, the WiMAX standard provides tools and mechanisms for bandwidth allocation and request that is described briefly as follows: (a) Bandwidth request At the entrance to the ... control mechanism decision 152 Quality of Service and Resource Allocation in WiMAX Will-be-set-by-IN-TECH Call admission control (CAC) and Bandwidth Allocation As in cellular networks, the IEEE 802.16 ... two modes of bandwidth allocation: • The Grant Per Subscriber Station (GPSS): In this mode, the BS guarantes the aggregated bandwidth per SS Then the SS allocates the required bandwidth for each...

Ngày tải lên: 21/06/2014, 05:20

... Modeling and Simulation, 2008 EMS ’08, pp 518-523, sep 2008 Mathias Bohge and James Gross and Adam Wolisz and Tkn Group and Tu Berlin and Michael Meyer and Ericsson Gmbh (2007) Dynamic Resource Allocation ... head-of-queue packet of each SS makes bandwidth request and follows the TBEB mechanism Based on the contention result, the processes of bandwidth allocation and packet transmission are then carried ... standard data slot is of length T ( T does not define scheduling algorithms for both BS and SSs, we assume here that the BS uplink scheduler will uniformly allocate bandwidth to SSs whose bandwidth...

Ngày tải lên: 21/06/2014, 05:20

... uplink allocations based on the bandwidth requests, QoS parameters and priorities of the service classes These decisions are transmitted to the SSs through the UL-MAP (Uplink Bandwidth Allocation ... the handover Graphs 10 and 11 below confirm this information Fig 10 Throughput with a handover policy 208 Quality of Service and Resource Allocation in WiMAX Fig 11 Sequence Number with a handover ... the scheduler The decisions regarding the time allocation of bandwidth usage are transmitted to the SSs through the DL-MAP (Downlink Bandwidth Allocation Map) MAC management message, located...

Ngày tải lên: 21/06/2014, 05:20

... DV and CTC – Map 231 232 Quality of Service and Resource Allocation in WiMAX Fig Blocking probabilities for DV and CTC – Map1 Fig 10 System throughput for DV and CTC – Map2 Evaluation of QoS and ... Probabilities for DV and CTC Map1 Fig MCS changes for DV and CTC Map1 110 140 Evaluation of QoS and QoE in Mobile WIMAX – Systematic Approach Fig System throughput for DV and CTC – Map1 Fig Bandwidth utilization ... VoIP delay for ARAC and EMAC (rtPS) Fig 12 G.711 VoIP delay for ARAC and EMAC (rtPS) 233 234 Quality of Service and Resource Allocation in WiMAX Fig 13 CBR VoIP delay for ARAC and EMAC (UGS) 80...

Ngày tải lên: 21/06/2014, 05:20

... Mobile Station (MS) utilizes a well-known handshaking procedure to request bandwidth resources from the BS (Andrews, 2007).With appearing needs of bandwidth increase for existing service connections ... strive for bandwidth- consuming and delay-sensitive QoS demands, whereas timely bandwidth fair allocation is of primary importance MAC QoS support of WiMAX enables to handle multiple video traffic ... object for further recording and later analysis Thus, dynamic allocation of available bandwidth in accordance with the proposed criteria enables optimization of system bandwidth The simulation results...

Ngày tải lên: 21/06/2014, 05:20

... 2005; Andrews et al., 2007; Nuaymi, 2007), as it essentially justifies the increased bandwidth compared to 3G systems, which bandwidth capacity will be further expanded in part ‘m’ of the standard ... layer in order to synchronize 276 Quality of Service and Resource Allocation in WiMAX WiMAX and IP handoff management (Chen & Hsieh, 2007) and in that way reduce the number of control messages ... in E-health and video surveillance applications over WiMAX systems We have experimentally shown how WiMAX technology is able to satisfy stringent demands for bandwidth- consuming and delay-sensitive...

Ngày tải lên: 21/06/2014, 05:20

... video signals in a VANET poses concerns Handling 294 Quality of Service and Resource Allocation in WiMAX congestion and packet loss becomes more difficult and delicate in a VANET environment where ... are routed and given priority due to the service class name associated with them and the scheduling type, which handles the bandwidth request/grant mechanism The silver service class and the Real-time ... Service and Resource Allocation in WiMAX buffer saturation as the service rate increases in this scenario might be caused by other factors such as, packet loss due to connection drops and reduced bandwidth...

Ngày tải lên: 21/06/2014, 05:20

... arrival Queue status and time slot allocation PRR based resource allocation and packet scheduling SNR and sensing time Adaptive modulation and channel coding PHY UWB channel shadowing and interference ... controller calculates the optimal resource time slot allocation in accordance with the target and instantaneous PRR and BER The target PRR and BER are set to 8% and 10−6 , respectively to meet ... subbands and the allocation is made by a subband; that means each user is dynamically allocated one subband for the duration of one superframe Hence, the effective SNR calculated for each subband...

Ngày tải lên: 21/06/2014, 11:20

... distributed among the BS and the SSs in order to be standard-compliant (the BS allocates aggregate bandwidth to the SSs and these decide the final allocation to flows and services) In this case, ... Fixed and Mobile Broadband Wireless Access Systems; Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Band and Corrigendum 1,” IEEE Standards, ... (DAMA) strategy that implements a Dynamic Bandwidth Allocation (DBA) solution (where bandwidth is understood as rate in a wide sense) Jointly with flow allocation, we consider the adjustment of...

Ngày tải lên: 21/06/2014, 22:20

... identify resource allocation strategies that maximize these rates We consider three resource allocation problems: (1) power allocation between training and data symbols, (2) time /bandwidth allocation ... identify resource allocation strategies that maximize the achievable rates We consider three types of resource allocation problems: (a) power allocation between data and training symbols, (b) time /bandwidth ... dynamic resource allocation, ” IEEE Transactions on Wireless Communications, vol 6, no 4, pp 1446–1454, 2007 [11] Y Yao, X Cai, and G B Giannakis, “On energy efficiency and optimum resource allocation...

Ngày tải lên: 21/06/2014, 23:20

... obtained by jointly optimal power and resource allocation and those obtained by power allocation only with equal resource allocation, for Scenario source-relay link and there is no benefit to allocate ... optimal power and resource allocation and those obtained by power allocation alone with equal resource allocation for three-user system with |K3R | = 0.6, |K30 | = 0.9, P = 2, and the remaining ... only power allocation and equal channel resource allocation Finally, we provided an example of the joint allocation of the power, the channel resource, and the relaying strategy, and showed that...

Ngày tải lên: 22/06/2014, 01:20

... initial bandwidth, UGS, rtPS, nrtPS and BE, based on the requested bandwidth of UGS, the required minimum bandwidth of rtPS and nrtPS and the queue length of BE service respectively If remaining bandwidth ... elements includes call admission control (CAC), scheduling and bandwidth allocation 2.2.1 Bandwidth allocation schemes During initialization and network entry, the BS assigns up to three dedicated ... Variable bandwidth assignment is possible in rtPS, nrtPS and BE services, whereas UGS service needs fixed and dedicated bandwidth assignment The BS periodically in a fixed pattern offers bandwidth...

Ngày tải lên: 27/06/2014, 01:20

... Netherlands; New Zealand; Nicaragua; Niger; Norway; Pakistan; Panama; Paraguay; Peru; Philippines; Portugal; Rwanda; Senegal; Spain; Sri Lanka; Sweden; Switzerland; Thailand; Togo; Trinidad and ... allocate the available resources in an e¢ cient way Maybe surprisingly, the sources and consequences of resource misallocation have only recently come to the fore of the macroeconomic and development ... detailed and thorough empirical analysis of resource misallocation in a broad sample of countries As for the …nance literature, it has traditionally focused on capital misallocation and its consequences...

Ngày tải lên: 21/04/2016, 13:19

... amplify -and- forward (AF) and decode -and- forward (DF) modes, and study power control scheme based on a two-stage game But, the studies in [3,6] not take subcarrier allocation into account, and in ... the uniqueness of a game-based resource allocation scheme are of high complexity In this article, we propose a semi-distributed resource allocation framework for the resource optimization in multi-cell ... l), and hhn (l) is the channel coefficient d,m 0m between the base station and the mth user, i = 1,2 Solution on relay selection, subcarrier and power allocation As is known to us, subcarrier and...

Ngày tải lên: 20/06/2014, 22:20

... 400, and 480 Mbps The spectrum is divided into 14 bands with each bandwidth of 528 MHz The consecutive three bands form one band group except the last two bands that form the last fifth group And ... case, we consider TFC1 and TFC2 in band groups 1, 2, 3, and e We have not considered resource allocation for voice traffic because its bandwidth requirement is too small The allocation of even an ... WiMedia PHY and MAC, and propose the synchronized MB-OFDM in Section We consider the resource allocation algorithms to deal with the enlarged bandwidth in Section Then, we apply the proposed allocation...

Ngày tải lên: 20/06/2014, 22:20

... solutions The proposed heuristics start with a random initial deviceto-segments allocation set by: (i) InitRandomly Random initial order of devices, and randomly set segment borders (code not shown) ... performance is affected by the bus segmentation and resource allocation We express the device-to-segment allocation problem as a min-max optimization problem and show its NP hardness To find reasonable ... function Tk (A) 5.2.2 Algorithms for Generating the Next Allocation Swapping Devices Randomly Algorithm Swap-Randomly picks two devices at random and swaps their places on the bus Observe that swapping...

Ngày tải lên: 21/06/2014, 20:20