lte scheduling

12.1 Preface One of the main functions provided by pdcch is to transmit physical layer Resource Allocation instructions, and pdcch indicates frequency-domain resource allocation on each sub-frame. The main challenge in designing signal allocation for frequency-domain resources (a group of resource blocks) is to find a good solution between flexibility and scheduling overhead. One feasible method is to send the combined resource allocation message to a

LTE system information is one of the key aspects of the air interface. it consists of the master information block (MIB) and a number of system information blocks (SIBs ). the MIB is broadcast on the physical Broadcast Channel(Pbch), while sibs are sent on the physical downlink shared channel (pdsch) through radio resource control (RRC) messages. sib1 is carried by "systeminformationblocktype 1" message. siB2 and other sibs are carried by "systeminfor

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

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

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

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

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.

LTE user documentation(if there are inappropriate places, please correct me!) )evolved Packet Core (EPC)we now explain how to write a simulation program that allows simulation of the EPC in addition to the LTE Wireless access network. The EPC allows the use of IPV4 networks to connect to LTE devices. In other words, conventional ns-3 applications and IPV4 sockets

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/

points of the sub-carrier overlay becomes SC-FDMA symbol, because the modulation is done in the time domain, so the uplink of a UE data can be regarded as a single carrier,So called SC-FDMA. A SC-FDMA symbol corresponds to the 12*NRB sub-carrier, and a time slot consists of 7 SC-FDMA symbols.4. For example, this re, which is assumed to be re (2,3), represents the third Sc-fmda symbolic symbol of the 2nd sub-carrier on the time domain. What this symbol is. is a waveform of physical space transfe

At present, LTE access bearer network is not widely used, but there are still many problems. So I have studied the development status and problems of the LTE access bearer network. I will share with you here, hoping it will be useful to you. From 2G/3G to LTE access bearer network, more than 90% of wireless site addresses will be reused, and 2G/3G will coexist wi

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

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

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