lte failover

, then the payload length of the DCI0 Bitstream is (1+1+11+5+1+2+3+2+1) = 27, so l_format=27,n=13. Because 13 (Fig. 1) (Figure 2 Table to look for when adjusting Pusch power) (Figure 3 The table to look for when adjusting the PUCCH power) 2.UE How to determine whether the current pucch adjustment or Pusch adjustment Since DCI3 can adjust the power of Pusch, can also adjust the power of the PUCCH, then how to differentiate the UE? Here the protocol uses different Rnti values to differentiate.

4g lte network protocol vulnerability discovered by researchers Recently, four US university researchers have discovered problems with the 4g lte protocol. This vulnerability can be exploited to fabricate false information and monitor users and address tracking. In the current phase of 5G deployment, we should also pay attention to the 4G problem discovered this time: the vulnerability is found in the

1. Why you need to add system information change mechanismFrom the LTE System Information (2)-sib Cycle Schedule We already know that the most of the system information required by UE is contained in different SIB blocks, which are broadcast to UE by SIB1 messages and SI messages, respectively. These parameters will not change in general, but there is no absolute, considering that some parameters may need to be modified in some specific cases, such as

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 all ue, but it may be rejected because it requ

In this era of rapid development of network information, 3G networks are currently difficult to meet people's current needs, and 4G networks have gradually entered people's lives. The competition is also intense. A 3G competition is about to kick off. A 4G network competition has already begun, and the three major operators will be able to see how they leverage the world's largest Chinese market to shake a global industrial chain. This leads the world's network development. TD-

What are the LTE downlink reference signals and upstream reference signals?In R9, the downlink defines four reference signals, respectively, for the cell-specific reference signal (C-RS), the user-specific reference signal (UE-RS, also known as Dm-rs), MBSFN reference signal, position reference signal (P-RS).In R10, the downlink defines five reference signals, namely, the cell-specific reference signal (C-RS), the user-specific reference signal (UE-RS

In LTE systems, the dynamic scheduling of RB resources is implemented on the ENB side, where the "RB resource" is actually referred to as virtualRB rather than physical RB(physical RB). VRB is the MAC layer used in the scheduling, is a logical concept, and PRB is the physical layer in the actual mapping of RE resources need to use, belonging to the actual physical sense of the concept . There are different mapping relationships between VRB and PRB: Th

This paper mainly describes the difference between competitive access and non-competitive access process under different scenarios.In the article "LTE-TDD Random Access Process (1)-purpose and classification" has been mentioned that random access can be divided into two types: competitive access and non-competitive access.Competitive scenarios include:(1) Initial access of UE(2) the reconstruction of UE(3) The UE has uplink data sent, but the uplink o

/********************************************************************************* * Long-term Evolution technology (Lte,long T ERM Evolution) * Statement: * In the process of porting the 4G module found that some of the various communication standards do not understand, mobile, unicom, telecommunications * They adopt different standards of communication, the more depressing is, take the mobile card to test only identify the module on the telecommunic

We often see the form in the HTML of the page like [if LTE IE 9] ... The code for [ENDIF] represents a statement that restricts certain browser versions to execute, so what are the rules for these judgment statements? Please see below: Project Example Description ! [If! IE] The NOT operator. This was placed immediately in front of the feature, operator, or subexpression to reverse the Boolean meaning

UBuntu 14.04 LTE set IP address and some server versions of Linux are not quite the same. For CentOS 7.0, for example, the configuration file for the NIC IP address should be/etc/sysconfig/network-scripts/ifcfg-eth0First Ubuntu 14.04 LTE under the IP address configuration file is/etc/network/interfaces。[Email protected]:/etc/network$Cat/etc/network/interfaces# Interfaces (5)fileUsed by Ifup (8) and Ifdown (

In a wireless network, a device (such as ENODEB) sends data to another device, such as a UE, by block. The sender uses the data in the block to calculate a CRC and sends it along with the block to the receiving end. The receiving end calculates a CRC based on the received data and compares it with the received CRC, and if the two are equal, the receiving end is deemed to have successfully received the correct data and reply an "ACK" to the sender; If the two are not equal, the receiver thinks th

: An SI can contain multiple sib, and multiple si have a common si window length; SIB2 content: Common channel configuration, upstream carrier frequency, bandwidth, Radio Resource, MBSFN (multimedia Broadcast Multicast Services single frequency network), Rach required information SIB3 ... SIB12: Public resources and re-election of various information; Second, the system message acquisition process the entire system receives the process to need: Obtains the MIB, obtains the Sib type1 the Si infol

 calculation of MCS, modulation order, encoding rate, spectral efficiency relationship table Reference URL: http://4g-lte-world.blogspot.tw/2012/12/transport-block-size-code-rate-protocol.html Reference URL: http://blog.richliu.com/2013/10/22/1545/ (1) Premises: Therefore, the efficiency can be simplified to the following formula: tbs= size of the transfer block (table 7.1.7.2.1-1) crc= the number of bits that are attached for error checking =24

1, ENB antenna arrival angle (LTESCAOA) beyond the normal rangeIn the OMC-R measurement reporting technical requirements, this field is defined as:"Defines the estimated angle of a user's relative reference direction. The measurement reference direction should be true north, counterclockwise. can assist to determine the location of the user, providing location services, accuracy of 5 degrees. This measurement data represents the number of samples that meet the range of criteria in the omc-r stat

LTE user documentation(if there are inappropriate places, please correct me!) )Configure UE MeasurementsThe user measurement configuration activated in the simulation depends on the selected "Consumers", such as the switching algorithm. Users may need to add their own configurations in the following ways: Directly configured in the base station RRC entity; Configure the existing switching algorithm; A new switching algorithm is develo

In view of the previous day to write a relevant knowledge point, and occasionally due to work reasons, did not follow up every day, so decided to write today another on the key technology of LTE knowledge, but also the last son.SON: (self organized network) ad-organized networks ;Contains three aspects: self-configuring, ANR (Automatic neighborhood optimization), MRO (switching self-optimizing);Automatic configuration is the base station cell equipmen

The LTE network has several key technologies, namely: Ofdm,amc,harq,mimo,icic,sonToday first to understand OFDM; (orthogonal Frequency Division multiplexing) Orthogonal frequency Division MultiplexingThe channel is divided into multiple orthogonal sub-channels, the high-speed data signal is converted into parallel low-speed sub-data stream, and modulated to each sub-channel for transmission.Orthogonal Frequency Division Multiplexing (OFDM) system is a

Tingfang Ji (Qualcomm), etc, "cell association and interference coordination in heterogeneous LTE-A cellular networks", jsac 2010. Background: Heterogeneous LTE Networks: Macro base station + femto Base Station In macro-only cellular network, macro base stations have the same transmit power, terminal is connected to the macro Base Station with the strongest power In heterogeneous network, terminals are

Key LTE technologies for wireless communication network learning ICIC (20141220), lteicic ICIC: Inter Cell Interference Coordination, Inter-Cell Interference Coordination technology. Cell interference is a key indicator that limits cell network cell throughput, especially for cell edge users. Because the Frequency Multiplexing factor supported by the LTE system is 1, meticulous management of inter-cell inte