Research and Implementation of Uplink Synchronization in TD-LTE

2013 ◽  
Vol 756-759 ◽  
pp. 846-850
Author(s):  
De Ming Zhang ◽  
Sheng Yao ◽  
Xiao Wen Li
Keyword(s):  
Detailed Analysis ◽  
Long Term Evolution ◽  
Base Station ◽  
Evolution System ◽  
Good Communication ◽  
Time Alignment ◽  
Term Evolution ◽  
Test Instrumentation

To make sure a good communication between the terminal and the base station, synchronization is needed between them. The Uplink Time Alignment has been provided in the long term evolution system (TD-LTE), by which uplink synchronization can be maintained in terminals. In this letter, the concrete implementation of the Uplink Time Alignment in MAC sub-layer of terminals and independently adjustment of uplink timing were designed with research of the Uplink Time Alignment and detailed analysis of the specific applications of Timing Advance Command in the terminal. The proposed implementation can be applied for the development of test instrumentation and TD-LTE ratio frequency conformance.

scholarly journals Analisis Tekno Ekonomi Biaya Capex dan Opex Implementasi Jaringan Long Term Evolution Area Banten

2017 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Totok Yuwanto
Keyword(s):  
Capacity Planning ◽  
Long Term Evolution ◽  
Base Station ◽  
Term Evolution ◽  
Coverage Estimation

Dengan semakin pesatnya pertumbuhan dan kebutuhan penggunaan data maka diperlukan suatu jaringan telekomunikasi yang mampu memenuhi kebutuhan tersebut yaitu dalam hal kapasitas, kualitas, mobilitas dan kecepatan. Untuk memenuhi kebutuhan  tersebut maka perusahaan operator telekomunikasi  dituntut untuk menggelar  jaringan telekomunikasi  yang mempunyai kapasitas besar, kecepatan tinggi, handal dan mempunyai kualitas yang bisa memenuhi kebutuhan tsb .  Salah satu tehnologi seluler terbaru yang bisa memenuhi kebutuhan tsb adalah tehnologi LTE. Pada penelitian ini dianalisa secara teknologi dan ekonomi terhadap implementasi LTE release 8 pada jaringan operator existing dengan menggunakan skenario join base station. Model analisa yang digunakan berdasarkan prinsip tekno ekonomi dengan menggunakan metoda capacity planning and coverage estimation untuk menentukan perancangan teknologi LTE serta  metoda DCF untuk menganalisa secara ekonomi dan juga mengukur kelayakan biaya yang dikeluarkan untuk implementasi LTE tersebut. Hasil penelitian diperoleh nilai NPV positif  dan IRR sebesar 12.95% , dengan nilai Pay Back Period 3 Tahun 1 Bulan. Berdasarkan hasil tsb dapat disimpulkan bahwa implementasi jaringan berbasis Long Term Evolution  (LTE)  di propinsi Banten layak untuk di implementasikan. 

An Improved Physical Downlink Control Channel De-Resource Mapping Method in Long Term Evolution Systems

2014 ◽  
Vol 513-517 ◽  
pp. 3577-3580
Author(s):  
Dan Wang ◽  
Wen Wen Xu ◽  
Jia Luo
Keyword(s):  
Reference Signal ◽  
Long Term Evolution ◽  
Mapping Method ◽  
Control Channel ◽  
Evolution System ◽  
Resource Mapping ◽  
Modified Method ◽  
Term Evolution ◽  
System Resource

In TD-LTE (Time Division-Long Term Evolution) system, Resource Element Group (REG) is the unit of de-resource mapping for Physical Downlink Control Channel (PDCCH), due to the reference signal should be considered, which lead to the large calculation. To solve this problem, a modified method is proposed in this paper to reduce the cycles of de-resource mapping. Calculation and simulation reveal that this scheme can reduce the calculation significantly. At the same time, the feasibility and effectiveness of this modified method have been verified.

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