lte dbm

UBuntu 14.04 LTE under host name and IP address resolution some related configuration files:/etc/hosts: Host file. Manually configure the mapping between the IP address and the host name. The format is one map bar item per line: /etc/network/interfaces: Host network interface configuration file, both Ifup and Ifdown commands depend on it./ETC/RESOLV.CONF: Name Server (DNS) configuration file, and actually /etc/resolv.conf is a linked file that points

Tags: class business body Difference Telecom diameter bring APN dynamic"Technical stuff." What is the difference between the user database HSS in LTE networks and the HLR of traditional 2g/3g? Can I combine networking?EPS HSS and HLR are respectively responsible for 4G user data and 2G/3G user data storage, the two main differences are:(1) different stored data, including user dynamic information and static contract data, HSS storage user 4G dynamic i

Note: Organize the PPT from shiming teacherContent Summary 1 Development History2 Feedforward Network (single layer perceptron, multilayer perceptron, radial basis function network RBF) 3 Feedback Network (Hopfield network,Lenovo Storage Network, SOM,Boltzman and restricted Boltzmann machine rbm,dbn,cnn)Development History single-layer perceptron 1 Basic model2 If the excitation function is linear, the least squares can be calculated directly 3 if the excitation function is sif

role, is the bearer of the current sub-frame pdsch scheduling control information ; the second function is the network side The PDCCH Order is initiated by DCI1A and the non-competitive random access process is triggered . For non-competitive random access related content, please refer to the LTE-TDD random access process (6)-sub-scenario description of competitive access and non-competitive access process.If DCI1A is used as PDCCH Order to trigger

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

Basic Introduction of LTE physical layer (1) The LTE physical layer implements significant technological innovation and performance enhancement. Key Technical innovations are mainly embodied in the following aspects: flexible configuration of time-frequency resources using OFDMA as the basic multi-access technology, and significant improvement in spectrum efficiency through MIMO technology; the use of AMC,

Failure phenomenon:The first time to open "Lenovo understand the Internet", did not appear input Lenovo account and password interface, but prompted: "Mobile network has not yet opened." This condition is run in connection with WiFi and you see the LTE icon in change adapter settings is not enabled.Reason Analysis:The use of pre-installed WIN10 system, in the WIN10 system under the flight mode has a separate set of wireless network, Bluetooth,

With the comprehensive commercial use of 3G, as the world's 4G (or the last 3g) candidate standards of TD-LTE technology has become the focus of the 2010 China International Information and Communications exhibition of major equipment manufacturers. The commercial applications of several equipment manufacturers can be seen in the previous article "2010 communications exhibition under triple play. This time, let's take a look at the most direct impact

First, we need to understand power control (3 gppts 36.213). When the mobile phone is far away from the base station, in order to ensure the quality of the call, we need to increase the sending power appropriately. When the distance is far to a certain extent, but there is no available peripheral cell, you need to reduce the service quality (e.g. bitrate ). In 3G networks such as UMTS and WCDMA, power control is needed at cell edge since channels are interfere each other. In the

general, the Turbo code member encoder is a RSC encoder. The reason is that the recursive encoder can improve bit BER performance of code. Turbo Code The turbo code used in the 3GPP LTE protocol is a parallel cascaded code with a 1/3-bit rate, and its encoder consists of two RSC encoders with the same code rate of 1/2 and a interleaving, as shown in Figure 2. Since recursive convolutional codes produce more code weight than non recursive convolutio

, 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.

Network Splitter | Mobile Internet Collector |100g LTE core network collectorThe RTL9807 flow acquisition equipment developed by Rongteng Network is a new generation NPS multi-core processing platform plus high performance switching chip, based on the ATCA architecture of high-performance 3g/lte acquisition and shunt equipment. Designed for the 3g/lte Core networ

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