scholarly journals RADIO ACCESS NETWORK REQUIREMENT FOR NEW DEPLOYMENT OF WIMAX IN DHAKA

2016 ◽  
pp. 175-179
Author(s):  
Tawhid Kawser ◽  
MOHAMMED R. AL-AMIN ◽  
KHONDOKER Z. ISLAM ◽  
SIFAT-E- MOHAMMAD
Keyword(s):  
High Speed ◽  
Access Network ◽  
Mobile Wimax ◽  
Radio Network ◽  
Planning Tool ◽  
Radio Access ◽  
High Speed Data ◽  
Simulation Results ◽  
Radio Planning

Mobile WiMAX is expected to be the next generation radio-interface, complementing WLAN and challenging EVDO/HSPA/LTE. High speed data rate, reduced latency, better Quality of service, and mobility can allow WiMAX to meet the rapidly growing demand of the users. A study of WiMAX Radio Network Planning (RNP) for an urban area like Dhaka city in Bangladesh is presented in this paper in order to help predetermine the radio access infrastructure requirements. A suitable radio planning tool has been used for this purpose. The simulation results of throughput and Carrier to Interference plus Noise Ratio (CINR) are provided.

Study of BLAST Signal Detection Algorithm in LTE System

2013 ◽  
Vol 756-759 ◽  
pp. 3183-3188
Author(s):  
Tao Lei ◽  
Deng Ping He ◽  
Fang Tang Chen
Keyword(s):  
Signal Detection ◽  
High Speed ◽  
Data Communication ◽  
Detection Algorithm ◽  
Detection Performance ◽  
Detection Algorithms ◽  
High Speed Data ◽  
Simulation Results ◽  
Better Than

BLAST can achieve high speed data communication. Its signal detection directly affects performance of BLAST receiver. This paper introduced several signal detection algorithmsZF algorithm, MMSE algorithm, ZF-SIC algorithm and MMSE-SIC algorithm. The simulation results show that the traditional ZF algorithm has the worst performance, the traditional MMSE algorithm and the ZF-SIC algorithm is similar, but with the increase of the SNR, the performance of ZF-SIC algorithm is better than MMSE algorithm. MMSE-SIC algorithm has the best detection performance in these detection algorithms.

Use of Traffic Separation Techniques for the Transport of HSPA and R99 Traffic in the Radio Access Network with Differentiated Quality of Service

2010 ◽  
pp. 863-878
Author(s):  
Xi Li ◽  
Yasir Zaki ◽  
Thushara Weerawardane ◽  
Andreas Timm-Giel ◽  
Carmelita Görg ◽  
...  
Keyword(s):  
Quality Of Service ◽  
Potential Benefit ◽  
Access Network ◽  
Significant Gain ◽  
Bandwidth Utilization ◽  
Radio Access Network ◽  
Radio Access ◽  
Maximum Utilization ◽  
Quantitative Evaluations

This article presents various traffic separation approaches to transmit HSPA (HSDPA/HSUPA) traffic in the existing ATM-based UMTS Radio Access Network, together with Release 99 (R99) traffic. The traffic separation technique enables QoS differentiations of HSPA and R99 traffic, while aiming to achieve a maximum utilization of the transport resources in the radio access network. The potential benefit of applying traffic separation and its impact on the performance of the transport network as well as the end users are explored in this article. The quantitative evaluations are provided by simulations. The results presented are obtained from a UMTS simulation model developed in this work which can transmit HSDPA and HSUPA traffic as well as R99 traffic simultaneously. The presented results demonstrate that applying traffic separation between HSPA and R99 traffic can considerably improve the performance of both HSPA and R99 traffic, and as well bring significant gain on efficient bandwidth utilization.

scholarly journals Obtaining More Realistic Cross-Layer QoS Measurements: A VoIP over LTE Use Case

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
F. Javier Rivas ◽  
Almudena Díaz ◽  
Pedro Merino
Keyword(s):  
Quality Of Experience ◽  
Access Network ◽  
Added Value ◽  
Cross Layer ◽  
Use Case ◽  
Lte Networks ◽  
Testing Environment ◽  
Radio Access ◽  
Open Issue

We introduce a real-time experimentation testbed in this paper which enables more realistic analysis of quality of service (QoS) in LTE networks. This testbed is envisioned for the improvement of QoS and quality of experience (QoE) through the experimentation with real devices, services, and radio configurations. Radio configurations suggested in the literature typically arise from simulations; the testbed provides a real and controlled testing environment where such configurations can be validated. The added value of this testbed goes a long way not only in the provision of more realistic results but also in the provision of QoS and QoE cross-layer measurements through the correlation of information collected at different layers: from service and IP levels to radio and protocol parameters. Analyzing the interlayer dependencies will allow us to identify optimal settings for the radio access network and service parameters. This information can be used to suggest new cross-layer optimizations to further improve quality of experience of mobile subscribers. As a use case, we examine VoIP service over LTE, which is currently an open issue.

scholarly journals Energy Efficiency and Capacity Tradeoff in Cloud Radio Access Network of High-Speed Railways

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Shichao Li ◽  
Gang Zhu ◽  
Siyu Lin ◽  
Qian Gao ◽  
Lei Xiong ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Power Allocation ◽  
Communication System ◽  
High Speed ◽  
Access Network ◽  
Small Scale ◽  
Delay Constraint ◽  
Radio Access Network ◽  
Cloud Radio Access Network ◽  
Radio Access

To meet the increasing demand of high-data-rate services of high-speed railway (HSR) passengers, cloud radio access network (C-RAN) is proposed. This paper investigates the tradeoff between energy efficiency (EE) performance and capacity in C-RAN of HSR. Considering that the train location can be predicted, we propose a predictable path loss based time domain power allocation method (PPTPA) to improve EE performance of HSR communication system. First, we consider that the communication system of HSR only bears the passenger information services (PISs). The energy-efficient power allocation problem with delay constraint is studied. The formulated problem is nonconvex. To deal with it, an equivalent convex problem is reformulated. Based on PPTPA, we propose an iterative algorithm to improve the EE performance. Second, we consider that the PISs and the train control services (TCSs) are all bore. A capacity optimization problem with joint EE and services transmission delay constraints is formulated. Based on PPTPA, we propose a hybrid power allocation scheme to improve the capacity of the system. Finally, we analyze the effect of small-scale fading on EE performance. The effectiveness of the proposed power allocation algorithm is validated by HSR channel measurement trace based emulation results and extensive simulation results.

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