Throughput Optimization in High Speed Downlink Packet Access (HSDPA)

In this paper, we investigate throughput optimization in High Speed Downlink Packet Access (HSDPA). Specifically, we propose offline and online algorithms for adjusting the Channel Quality Indicator (CQI) used by the network to schedule data transmission. In the offline algorithm, a given target BLER is achieved by adjusting CQI based on ACK/NAK history. By sweeping through different target BLERs, we can find the throughput optimal BLER offline. This algorithm could be used not only to optimize throughput but also to enable fair resource allocation among mobile users in HSDPA. In the online algorithm, the CQI offset is adapted using an estimated short term throughput gradient without specifying a target BLER. An adaptive stepsize mechanism is proposed to track temporal variation of the environment. We investigate convergence behavior of both algorithms. Simulation results show that the proposed offline algorithm can achieve the given target BLER with good accuracy. Both algorithms yield up to 30% HSDPA throughput improvement over that with 10% target BLER

analisis performansi dan optimasi HSDPA studi kasus Bandung selatan

ABSTRAKSI: High-Speed Downlink Packet Access (HSDPA) adalah pengembangan teknologi WCDMA yang berupa layanan berbasis paket data dan biasa disebut sebagai teknologi 3,5G. HSDPA memberikan jalur evolusi untuk jaringan Universal Mobile Telecommunications System (UMTS) yang memungkinkan untuk penggunaan kapasitas data yang lebih besar (sampai 14,4 Mbit/detik arah turun). HSDPA mendefinisikan sebuah saluran WCDMA yang baru, yaitu High-Speed Downlink Shared Channel (HS-DSCH) yang cara operasinya berbeda dengan saluran WCDMA yang ada sekarang. Hingga kini penggunaan teknologi HSDPA hanya pada komunikasi downlink menuju user equipment (UE).Tugas akhir ini membahas performansi jaringan dan analisa kinerja jaringan HSDPA. Analisa performansi jaringan dilakukan berdasarkan data hasil pengukuran drive test, adapun data yang di analisa meliputi data RSCP dan Ec/No. Untuk membantu menganalisa data pengukuran tersebut maka akan digunakan software TEMS, software ini akan membantu enginner dalam melihat dan mengolah data, sehingga dapat dianalisis dengan baik. Hasil analisis memberikan solusi optimasi atau rekomendasi yang dapat dilakukan untuk setiap NODE B yang diteliti. Solusi yang akan dipergunakan untuk proses optimasi pertimbangan untuk meningkatan kualitas RSCP dan Ec/No dari sisi Mobile Seluler (MS) ke NODE B pada daerah studi kasus, yaitu daerah Bandung Selatan. Sehingga harapan dari hasil optimasi mengakibatkan peningkatan kualitas performansi jaringan HSDPA di Bandung Selatan dan kepuasan pelanggan akan meningkat.Hasil yang dapat diambil dari hasil drivetest setelah optimasi adalah membaiknya jaringan HSDPA di daerah Bandung Selatan itu dapat di lihat dari nilai rata-rata parameter-parameter yang ditinjau yaitu RSCP, Ec/No, dan throughput berturut-turut sebesar -76.09 dBm, -7.18 dB dan 441.16 kbps. Dapat dilihat dari hasil drivetest setelah optimasi bahwa nilai-nilai tersebut telah mencapai target KPI dari operator yang bersangkutan.Kata Kunci : HSDPA, drivetest, RSCP, Ec / No ,throughputABSTRACT: High-Speed Downlink Packet Access (HSDPA) is development technology UMTS spesification release 5 that service based on packet and sometimes called to as 3.5 G technology. HSDPA provides evolution path for network Universal Mobile Telecommunications System (UMTS), which allows for the use of data capacity is greater up to ( 14.4 Mbit / sec downlink direction ). HSDPA defines a new channel W-CDMA, the High-Speed Downlink Shared Channel (HS-DSCH), which is operating with a different W-CDMA channel that is now. Until now HSDPA technology use only for downlink in the communication.This final project discussing about performance analysis and optimization for HSDPA network. Network performance analysis will be done based on the data drive test measurement results, while the data to be analyzed include data RSCP, Ec/No and throughput. To help analyze the data used TEMS software. This software will help engineer to process data, so that it can be analyzed properly. The results of the analysis will provide optimization solutions that can be done for each node B. The solution that will be used for the optimization consider to increase the quality of RSCP, Ec/No and throughput from MS to node B side in study case area, South Bandung. So the expectation from the optimization result is to increase the quality of HSDPA network in South Bandung, and customer satisfaction will increase.From the result of drivetest measurement after optimization the quality of HSDPA network in South Bandung better than before optimization, it can be seen from the average result of field parameter which are RSCP -76.09 dBm, Ec/No -7.18 dB, and throughput 441.16 kbps. From the average result of field parameter, it can be seen that the result is absolutely pass the KPI target from the operator .Keyword: HSDPA, drivetest, RSCP, Ec / No ,throughpu

Final report on the evaluation of RRM/CRRM algorithms

Deliverable public del projecte EVERESTThis deliverable provides a definition and a complete evaluation of the RRM/CRRM algorithms selected in D11 and D15, and evolved and refined on an iterative process. The evaluation will be carried out by means of simulations using the simulators provided at D07, and D14.Preprin

Quality of service optimization of multimedia traffic in mobile networks

Mobile communication systems have continued to evolve beyond the currently deployed Third Generation (3G) systems with the main goal of providing higher capacity. Systems beyond 3G are expected to cater for a wide variety of services such as speech, data, image transmission, video, as well as multimedia services consisting of a combination of these. With the air interface being the bottleneck in mobile networks, recent enhancing technologies such as the High Speed Downlink Packet Access (HSDPA), incorporate major changes to the radio access segment of 3G Universal Mobile Telecommunications System (UMTS). HSDPA introduces new features such as fast link adaptation mechanisms, fast packet scheduling, and physical layer retransmissions in the base stations, necessitating buffering of data at the air interface which presents a bottleneck to end-to-end communication. Hence, in order to provide end-to-end Quality of Service (QoS) guarantees to multimedia services in wireless networks such as HSDPA, efficient buffer management schemes are required at the air interface. The main objective of this thesis is to propose and evaluate solutions that will address the QoS optimization of multimedia traffic at the radio link interface of HSDPA systems. In the thesis, a novel queuing system known as the Time-Space Priority (TSP) scheme is proposed for multimedia traffic QoS control. TSP provides customized preferential treatment to the constituent flows in the multimedia traffic to suit their diverse QoS requirements. With TSP queuing, the real-time component of the multimedia traffic, being delay sensitive and loss tolerant, is given transmission priority; while the non-real-time component, being loss sensitive and delay tolerant, enjoys space priority. Hence, based on the TSP queuing paradigm, new buffer managementalgorithms are designed for joint QoS control of the diverse components in a multimedia session of the same HSDPA user. In the thesis, a TSP based buffer management algorithm known as the Enhanced Time Space Priority (E-TSP) is proposed for HSDPA. E-TSP incorporates flow control mechanisms to mitigate congestion in the air interface buffer of a user with multimedia session comprising real-time and non-real-time flows. Thus, E-TSP is designed to provide efficient network and radio resource utilization to improve end-to-end multimedia traffic performance. In order to allow real-time optimization of the QoS control between the real-time and non-real-time flows of the HSDPA multimedia session, another TSP based buffer management algorithm known as the Dynamic Time Space Priority (D-TSP) is proposed. D-TSP incorporates dynamic priority switching between the real-time and non-real-time flows. D-TSP is designed to allow optimum QoS trade-off between the flows whilst still guaranteeing the stringent real-time component’s QoS requirements. The thesis presents results of extensive performance studies undertaken via analytical modelling and dynamic network-level HSDPA simulations demonstrating the effectiveness of the proposed TSP queuing system and the TSP based buffer management schemes

EVEREST IST - 2002 - 00185 : D23 : final report

Deliverable públic del projecte europeu EVERESTThis deliverable constitutes the final report of the project IST-2002-001858 EVEREST. After its successful completion, the project presents this document that firstly summarizes the context, goal and the approach objective of the project. Then it presents a concise summary of the major goals and results, as well as highlights the most valuable lessons derived form the project work. A list of deliverables and publications is included in the annex.Postprint (published version

Performance Analysis of 3G Communication Network

In this project, third generation (3G) technologies research had been carried out to design and optimization conditions for 3G network. The 3G wireless mobile communication networks are growing at an ever faster rate, and this is likely to continue in the foreseeable future. Some services such as e-mail, web browsing etc allow the transition of the network from circuit switched to packet switched operation, resulting in increased overall network performance. Higher reliability, better coverage and services, higher capacity, mobility management, and wireless multimedia are all parts of the network performance. Throughput and spectral efficiency are fundamental parameters in capacity planning for 3G cellular network deployments. This project investigates also the downlink (DL) and uplink (UL) throughput and spectral efficiency performance of the standard Universal Mobile Telecommunications system (UMTS) system for different scenarios of user and different technologies. Power consumption comparison for different mobile technology is also discussed. The analysis can significantly help system engineers to obtain crucial performance characteristics of 3G network. At the end of the paper, coverage area of 3G from one of the mobile network in Malaysia is presented

Time-Efficient resource allocation algorithm over HSDPA in femtocell networks

This paper presents a time-efficient optimal resource allocation algorithm aiming to maximize the system throughput of the single-user High Speed Downlink Packet Access (HSDPA) deployed in femtocell base station. The system throughput maximization with constrained total power is rst formulated as a constrained integer programming problem. We rst prove that a two-group bit and energy allocation provides the global optimum solution in the system without multipath. We then focus on the use of the two-group allocation method over frequency selective channels. A pre-processing method was used to systematically cluster and remove channels to stop using energies over severely degraded channels with the two-group allocation approach. This improves the system throughput whilst greatly reducing the computation complexity. The proposed twogroup approach with channel removal is suitable for femtocell base station with limited signal processing capability.Accepted versio