lte

Chang gang, Ericsson China's chief market officer, said that during the construction of TD-LTE, D + F hybrid networking will be the final network form. He further stressed that for the construction of F band, F band new than the TD-SCDMA upgrade in performance, optimization and maintenance, there is no significant difference in the construction progress and investment benefits. D-band is superior to F-band upgrade According to the news, China Mobile i

Extended LTE network For Network developers, you only need to pay a little attention to the current situation of 4G/LTE communication needs, and you will be able to understand the future development trend. According to recent forecasts, mobile data traffic will increase by 11 times by 2018. More than half of the 190 EB data flowing through the wireless network will be transmitted through the 4G/

After writing the previous blog, "LTE cell search-Physical cell ID and synchronization signal PSS, SSS," I would like to continue to write system information related content, but found to write the time necessary to involve PDCCH, Phich and other content, and these content has not been systematically written. So the next few posts will write some of the LTE background knowledge that needs to be mastered.Thi

1. Frequency band (Band)The so-called frequency band , refers to the wireless decoder in the specified degree of distortion and rated output power of the operating band width, refers to a frequency range or the width of the spectrum , that is, the minimum operating frequency of the wireless decoder to the maximum operating frequency range, The unit is Hz. For convenience, in LTE, a digital 1-43 is used to denote different bands (36101-v10.21.0 version

In the Last Post, "LTE Physical Transmission Resources (3)-time-frequency resources," the final mention of Pcfich and other downstream physical channels, this blog post originally wanted to write Pcfich channel, but in preparation for writing Pcfich, found the need to use the antenna port related content, and these content is not yet written. So this paper first write the antenna port and downlink reference signal related content.1. Relationship of an

China Mobile Shanghai company plans to launch TD-LTE trial for commercial use in the first half of next year. On June 28, at the fifth session of the Shanghai Communications Development Conference, Mao weiliang, deputy general manager of the data business department of China Mobile Shanghai Company, revealed that in the second half of this year, TD-LTE terminal only data card, wait until the first half of

, the current use of narrowband digital clusters such as TETRA or WiFi in private networks is subject to technical system lags behind, weak data bandwidth capabilities, and poor mobility, it is difficult to meet the development requirements of industry private networks. To help private network users solve the above problems, narrowband Digital cluster technology has clearly evolved to a broadband multimedia Cluster Based on LTE, the TD-

Before reading this article, it is recommended to take a look at the post "LTE-TDD HARQ (1)-upstream HARQ timing" to better understand the content of this article.The main contents of this article include:(1) What is the Phich channel and what is its role?(2) How to uniquely identify a Phich channel(3) What is the content of the Phich channel corresponding to the reg actual mapping?(4) Location of the Phich channel1. What is the Phich channelPHICH Cha

What does VoWi-Fi bring to the voice communication experience in the LTE age? In the Internet era, users have high requirements on business experience, including voice services. To some extent, this can be explained that compared with the global LTE construction climax, the VoLTE business is growing more slowly. As the first telecom-level public voice service, VoLTE puts forward high requirements on the op

In tdd lte, upper and lower lines are not necessarily symmetric. When the number of downstream sub-frames is higher than that of the upstream sub-frames, the harq of multiple downstream sub-frames is reported in one upstream sub-frame. The number of harq records reported in an uplink sub-frame depends on the configuration of the LTE uplink and downlink MIMO modes. Through upper layer configuration,

Cat. That is ue-category, according to the definition of 3GPP, ue-category is divided into 1~10 a total of 10 levels, of which cat.1-5 is R8 definition, cat.6-8 is R10 definition, cat.9-10 is R11 definition. As shown above, ue-category mainly defines the upper and lower line rates that the UE terminal can support. The cat.0 is an LTE terminal grade that is written to the 3GPP rel.12 Standard and supports a lower-rate, lower-power version. cat.0 and

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

LTE user documentation(if there are inappropriate places, please correct me!) )7 using Fading TraceThis section describes how to use the fading traces in LTE emulation. (1) Generate Fading tracesgenerate fading traces by using the code provided by the dedicated MATLAB script (/lte/model/fading-traces/fading-trace-generator.m). The script contains a typical taps c

Understanding CS fallback in LTE LTE technology supports packet based services only, however 3GPP does specifies fallback for circuit switched services as well. To achieve this LTE architecture and network nodes require additional functionality, this blog is an attempt to provide overviewFor same. In LTE architecture,

Question 16: Time Synchronization 1.Wireless Link Quality Detection To ensure the correct transmission of downstream signaling and data, the UE side needs to check the downlink quality after the cell search is complete to ensure that the downlink signaling and data are correctly received, the UE implements uplink synchronization with the base station through the random access process. After that, the base station continuously sends timed adjustment commands to the UE to maintain uplink synchroni

Some key LTE technologies in Vernacular I have never been in touch with the actual LTE equipment because I am working on CDMA, but I have read a lot of theoretical materials, including the red books. I personally feel that Chinese books are not very good yet, it covers a wide range of topics, but there are very few details. If you want to study it in depth, unless you look at the agreement, but how tired t

Although 4G is commercially available for half a year, the base station has poor network coverage and weak mobile phone signals, but there are still situations where the base station cannot be online or make phone calls. However, if the carrier uses a superconducting link system, mobile phone users do not have to worry about this. Recently, reporters from a third-party detection agencies to a test results report that the use of superconducting lte rf

Network splitter |3g/lte Service collector | Mobile Internet Collector 1, overview | network shunt | 3G/LTE wireless network monitoring is far more complex than the original Internet backbone monitoring, mainly in the following aspects: The System diversity, China Mobile based on TD-SCDMA Technology, China Telecom is based on the CDMA2000 technology standard, and Unicom is based on WCDMA technology. Theref

With the development and evolution of mobile network communication systems, 3G mobile communication systems are no longer a distant dream. As China Mobile, China Unicom, and China Telecom increase their 3G network construction scale, a new term comes to our eyes, namely LTE. This article will focus on the differences between the 3G network architecture and the LTE network architecture, and explore the

Adax, industry leader in High-Performance Data grouping, processing, security, and network infrastructure, warned that the current LTE signaling infrastructure is insufficient, it is difficult to meet the next wave of 4G deployment needs. Market research firm Strategy Analytics also pointed out in its predictions that by 2017, the total number of LTE users worldwide will reach 1 billion, this means that all