Resource allocation in cellular CDMA systems with cross layer optimization

... studies resource allocation in cellular CDMA systems with cross- layer optimization across the physical layer, the link layer and the network layer The analyses for the network layer and the link layer ... layer, the link layer and the network layer is investigated The cross- layer model is shown in Fig 1.4 with involving the physical layer, the link layer and the network layer In the physical layer, ... certainly produce a system utilization gain as compared to that in the segregated -layer design In the thesis, resource allocation in cellular CDMA systems with cross- layer optimization across...

Báo cáo hóa học: " Cross-Layer Design and Analysis of Downlink Communications in Cellular CDMA Systems" docx

... set and sends back HCM Terminate (b) Proposed soft handoff procedure Figure 6: Soft handoff algorithm and procedure 4.2 Soft handoff One of the major benefits of a CDMA system is the ability of a ... Spain, September 2004 [7] J Yao, T C Wong, and Y H Chew, Cross-layer design on the reverse and forward links capacities balancing in cellular CDMA systems,” in Proceedings of IEEE Wireless Communications ... Umeda, Downlink packet-scheduling considering transmission power and QoS in CDMA packet cellular systems,” in Proceedings of the 4th IEEE International Workshop on Mobile and Wireless Communications...

Radio resource allocation in wireless OFDM systems

... exploiting multiuser diversity gain In order to achieve such an increase in throughput, radio resources need to be managed in an eﬃcient way by adapting to the instantaneous conditions of radio links ... variable for user l in BS n using modulation q on subcarrier k n is omitted in single-cell or distributed systems; k is omitted in single carrier systems; q is omitted in systems using ﬁxed modulation ... deployed Chapter Introduction in radio networks These techniques can also be used in OFDM systems to support multiple mobile terminals With many subcarriers available in OFDM systems, an intuitive way...

Báo cáo hóa học: " Research Article Resource Allocation in MU-OFDM Cognitive Radio Systems with Partial Channel State Information" potx

... for multiuser OFDM cognitive radio systems, ” in Proceedings of the 2nd International Conference on Communications and Networking in China (ChinaCom ’07), pp 115–119, Shanghai, China, August 2007 ... Networking Resource Allocation with Partial Csi Note that the joint subcarrier, bit, and power allocation problem in (10)–(17) belongs to the mixed integer nonlinear programming (MINP) class [23] ... in Section and the main ﬁndings are summarized in Section System Model We consider the problem of allocating resources on the downlink of an MU-OFDM CR system with one base station (BS) serving...

Báo cáo hóa học: " Research Article Other-Cell Interference Reducing Resource Allocation in OFDM-Based Asynchronous Cellular Systems" doc

... system model in consideration In Section 3, the proposed OCI reducing scheme is described Then, the proposed resource allocation methods are applied to OFDM-based cellular systems in Section The ... using orthogonal spreading codes The use of spreading codes can reduce the ﬂuctuation of channel and/or interference, yielding a diversity gain 4.2.1 Optimum WH code allocation Real-valued binary ... be obtained by Pxn = E xn = ASn , (A.4) where CONCLUSIONS We have proposed novel resource allocation schemes that can reduce the OCI in OFDM-based asynchronous cellular systems by reducing the...

Báo cáo hóa học: " Research Article Practical Approaches to Adaptive Resource Allocation in OFDM Systems" docx

... implementation of adaptive resource allocation in OFDMA is a disjoint subcarrier, power, and bit allocation Herein, we further simplify the optimization problem and restrict adaptive resource allocation ... potential for increasing the multiuser diversity in multiple access has resulted in an extension of the algorithm to OFDMA [24] A low-complexity implementation of the OSSA in OFDMA includes initial ... descending order in (15) Then the following lemma is valid Lemma For an OFDMA system with equal users’ bitrates operating in a Rayleigh channel, the initial subcarrier allocation according to Algorithm...

Báo cáo hóa học: " Research Article Reverse Link Outage Probabilities of Multicarrier CDMA Systems with Beamforming in the Presence of Carrier Frequency Offset" doc

... CDMA systems [14, 15, 18] However, MC -CDMA systems have not been examined in such studies In this paper, the reverse link of an MC -CDMA system with the beamforming technique in the presence of ... , (13) In this section, the outage probability of MC -CDMA systems in the presence of CFO with perfect beamforming is evaluated To start the analysis of the outage probability, the SINR in (11) ... beamforming in the presence of CFO The remainder of the paper is organized as follows The system model is described in Section The outage probability for MC -CDMA with beamforming in the presence of CFO...

Báo cáo hóa học: " Performance of Asynchronous MC-CDMA Systems with Maximal Ratio Combining in Frequency-Selective Fading Channels" docx

... subcarrier fading power of other users Thus the BER of an MC-CDMA uplink channel conditioned on MC-CDMA Uplink Performance in Correlated Multipath Channels the set of subcarrier fading amplitudes ... Electronic Engineering (EEE) in Nanyang Technological University, Singapore Her research interests include channel modeling for MCM systems, performance analysis of MC-CDMA, diversity combining Yong Liang ... paths in Rayleigh, Rician, and Nakagami fading channels Rayleigh fading is discussed as a special case of Nakagami or Rician fading Np m= In this subsection, we model the fading path gains {gl...

báo cáo hóa học: " On the Lambert-W function for constrained resource allocation in cooperative networks" docx

... to find the optimal set of lk and μ The Lambert-W function for CDIT-based power allocation in relay networks In this section, we show how the Lambert-W Function can be used for constrained resource ... closed-form solution for resource allocation problems in wireless mesh and relay networks constitutes the principal contribution of this article The Lambert-W function for subcarrier allocation in ... resource allocation in closedform Using the Lambert-W function, resource allocation can quickly be determined since a number of popular mathematical softwares, including Maple and Matlab, contain the...

Quality of Service and Resource Allocation in WiMAXFig Part 1 pdf

... QPSK 1/ 2 5.82 5.65 5.33 4.80 QPSK 3/4 8.73 8.47 8.00 7.20 16 -QAM 1/ 2 11 .64 11 .29 10 .67 9.60 16 -QAM 3/4 64-QAM 2/3 64-QAM 3/4 17 .45 16 .94 16 .00 14 .40 23.27 22.59 21. 33 19 .20 26 .18 25. 41 24.00 21. 60 ... orders@intechweb.org 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 ... Quality of Service and Resource Allocation in WiMAX Edited by Roberto C Hincapie and Javier E Sierra Published by InTech Janeza Trdine 9, 510 00 Rijeka, Croatia Copyright © 2 012 InTech...

Quality of Service and Resource Allocation in WiMAXFig Part 5 pdf

... WiMAX physical layer standard OFDM_BPSK_1_2 in our simulations [24] 100 Quality of Service and Resource Allocation in WiMAX UGS 350 0 3000 Throughput 250 0 2000 150 0 1000 50 0 300 800 1400 1900 2400 ... for the remaining users under high SINR assumption 114 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH 10 3) Power minimization with individual rate constraints Now assume ... according to a particular 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...

Quality of Service and Resource Allocation in WiMAXFig Part 6 pot

... pseudorandomly, thereby resulting in interference averaging as explained in Byeong Gi Lee & Sunghyun Choi (2008) 118 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH ... Fundamentals of resource allocation in wireless c networks: Theory and algorithms, Springer Thanabalasingham, T., Hanly, S V., Andrew, L L H & Papandriopoulos, J (20 06) Joint allocation of subcarriers and ... in a single RAT scenario Most of the research effort is thus on the vertical handovers management, in order to optimize the resource usage, maintaining an adequate quality- of- service and acting...

Quality of Service and Resource Allocation in WiMAXFig Part 7 doc

... left to the choice of the provider State of the art 3.1 Bandwidth sharing strategies: background To maintain a quality of service required by the constraining and restricting services, there are ... to C and types of service class (class and 2) If class (i.e aggreagted calls) uses I units then 154 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH the remained bandwidth ... 142 14 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH autonomous RAT switching strategy and the assisted RAT switching strategy and we extend the investigation...

Quality of Service and Resource Allocation in WiMAXFig Part 8 ppt

... structure deﬁned in the IEEE 80 2.16 standard for TDD in PMP mode is shown in Fig Each frame has a duration of Δ and is divided into uplink and downlink subframes At the beginning of a downlink subframe, ... presents the details of Block B of Fig 2, which calculates the mean service time of REQs 182 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH backoff begins TRE TDL TRE ... Notes in Computer Sciences, Springer-Verlag 174 28 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH S Khemiri, K Boussetta and N Achir & G Pujolle (2007) Bandwidth partitioning...

Quality of Service and Resource Allocation in WiMAXFig Part 9 docx

... uplink channel and the UL-MAP contains the physical specifications and also the time allocation of 202 Quality of Service and Resource Allocation in WiMAX resources After the downlink and uplink ... piece of information coded in 16 bits A connection is a unidirectional mapping between a BS and a 198 Quality of Service and Resource Allocation in WiMAX SS MAC peers for the purpose of transporting ... 192 16 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH J G Andrews; A Ghosh & R Muhamed (2007) Fundamentals of WiMAX: Understanding Broadband Wireless Networking,...

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