In recent years, the increasing demand for mobile data services has promoted the acceleration of LTE network commercialization. Throughout the world, LTE commercial networks are still dominated by lte fdd, but with the gradual development of their networks, users and businesses are increasing, lte fdd network frequency
Currently there are two 4G standards based on LTE, namely LTE FDD and LTE TDD (the domestic custom of LTE TDD is called Td-lte). See the name you will have an intuitive impression, the two standards are based on the different branches of
China's LTE commercialization is approaching, and the industry's attention to the subsequent evolution of LTE has reached a new peak. Compared with 3G, LTE significantly improves the spectrum efficiency. However, the industry has not stopped. A few years ago, 3GPP began to research and develop the LTE-Advanced standard
4G TDD-LTE and FDD-LTE two models, do you understand?
At present, there are two 4G standards based on LTE, namely lte fdd and lte tdd (China is used to call lte tdd TD-LTE, both stand
LTE beginners, if you also for the LTE self-study and confused;LTE scholars, if you're still worried about the effectiveness of LTE learning,If you want to learn LTE well instead of simply learning about LTE,To make
-frame is to allow the terminal to decode the downlink dispatch information at an early stage (the translator note: The terminal can know how to decode the Dl-sch information), so that the terminal before the end of the sub-frame transmission can be Dl-sch demodulation and decoding, reduce dl-sch decoding delay, This reduces the delay of the overall downstream transmission. More importantly, the control domain is placed at the beginning of the sub-frame, then those non-scheduled terminals do not
The Charm Clan MX5 cracked unicom/Mobile 4g/3g (TD-LTE/TD-SCDMA/FDD-LTE/WCDMA)
Prerequisite: To ensure adequate electricity, at least 50%. Use pea pods, application treasure, etc. to back up important information.
1, download MX5 General edition firmware (http://www.flyme.cn/firmware.html)
2, after downloading, the handset and the computer through the data line connection.
Hint: The screenshot b
In December 5, Wei leping, director of China Telecom Technology Commission, said that after China Telecom obtained a 4G license, it will coordinate the coordinated development of LTE and FTTH and give full play to its respective advantages ~ In the past 10 years, LTE and FTTH will be two major technical levers for China Telecom. In terms of 4G network planning, China Telecom will first adopt TDD and FDD hyb
Layered Structure of LTE air Interfaces
Layered Structure of LTE air Interfaces
LTE air interface layer structure, and WCDMA air interface layer structure is the same, from top to bottom is also divided into several layers of RRC-PDCP-RLC-MAC-PHY, RRC belongs to the network layer, PDCP, RLC and MAC belongs to the link layer, PHY belongs to the physical layer. T
Influence of LTE technology on PTN
China and the rest of the world are entering the brand new 4G/LTE era at full speed. As a mobile return technology, PTN faces severe challenges even after years of evolution and maturity. Some of these technological changes are huge enough to trigger a PTN revolution. This article takes into account the deployment of macro base stations and micro base stations, and review
There is types of frame structure in the LTE standard, type 1 and type 2. Type 1 uses Frequency Division duplexing (Uplink and downlink separated by Frequency), and TDD uses time division Duplexin G (Uplink and downlink separated in time). This overview covers both LTE FDD Type 1 signals and LTE TDD type 2 signals described in the standard documents listed in The
Multi-frequency and ultra-Broadband Antennas must not be underestimated in LTE deployment
According to the latest GSA (Global mobile Suppliers Association) statistics, operators in 112 countries around the world have commercialized 331 LTE Networks. It is estimated that by the end of 2014, the number of Global LTE commercial networks will reach 350. With the ar
Network Collaboration of TD-LTE
Is there mutual interference between the TD-LTE and the current 2G system in the adjacent frequency? How can this problem be solved?
A: In actual network deployment, the F-band (1880-1915 MHz) TD-LTE base station will be affected by the stray/blocking/Intermodulation Interference of DCS1800, the Second Harmonic Interference of GSM
Latest Advances in TD-LTE Testing
At present, the first phase of core network, transmission, bearing and security testing work has been completed in the six test fields of TD-LTE. The results meet the test expectations, and all of them have entered the formal test conditions, in the future, the wireless performance, multi-antenna, terminal, indoor distribution system, network management and other aspects of
Modern mobile communication tends to provide high-speed transmission multimedia services. The birth of LTE family base stations effectively improves the coverage, throughput, and transmission experience of the system in hot areas.
In the standardization process of LTE, the concept and technology of a family base station HomeeNodeB and HeNB came into being. Unlike traditional cell communication base stations
As an evolution after 3G-4G, do you know its technical characteristics? As one of the 4G standard record filing systems, wireless TD-LTE-Advanced adopts the multi-access method, frame structure similar to TD, and wireless MIMO technology. The following is a detailed introduction.
Features of wireless TD-LTE-Advanced Technology
1. Multiple Access Method
The wireless TD-L
Detailed analysis of LTE system switching technology (1)
I. Switching Technology of TD-LTE System
1. Overview of TD-LTE Switching
As a TD-SCDMA System of TD-LTE evolution technology, the fast hardware switching method can be used to realize the switching between different frequency bands and between systems, so as t
Recently, there are a lot of topics on TD-SCDMA. The point of view is to support and oppose the two factions, and to settle the historical scores. Personally, TD-SCDMA itself is indeed a failure, at least the masses of the eyes are discerning. But also can not completely negate the credit of TD-SCDMA, it is not the key to td-lte development and growth, not to say, but at least for Td-lte laid a foundation.
With the division of spectrum resources, a huge rock in the road of TD-LTE commercialization was moved. At the recently held "TD-LTE technology and spectrum Seminar", China's 2.6GHz spectrum planning scheme was announced,-2690hz of the 2.6GHz band all divided into TDD spectrum. The determination of spectrum division, which sent a clear signal to the TD-LTE indust
Original link:Http://lteuniversity.com/get_trained/expert_opinion1/b/hongyanlei/archive/2009/08/06/cqi-reporting-in-lte.aspx
CQI = channel quality Indicator; signal quality indication;RI = rank indication; Rank indicator;PMI = precoding matrix Indicator; pre-coded matrices indicator;
The CQI is used to reflect the channel quality of downstream Pdsch. Use 0~15 to represent the channel quality of Pdsch. 0 indicates the worst channel quality and 15 indicates the best channel quality.–>ue sends CQI
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