lte

the next stop to where, and the platform confirmed after the decision to not get off, this is the closed loop, generally at low speed or static situation.As for the closed loop, it was as if the bus was opening quickly, which led us to the station, but too late.In the case of slow channel changes, such as indoor or nomadic access services in large cities, it is necessary to use the closed-loop MIMO to further improve the performance of the shampoo.Closed-loop system is the receiving end of the

ICIC:Inter Cell interference coordination, inter-cell interference coordination technology. For cellular network cell throughput is the key limit of the target is the cell disturbance, especially the cell edge users. Because the LTE system supports a frequency multiplexing factor of 1, the meticulous management of inter-cell interference is particularly important.The Icic design guideline is to increase the throughput of edge users without decreasing

Redirection in LTE means that the system uses redirectedcarrierinfo in the rrcconnectionrelease message to indicate that the UE will attempt to reside in the specified system/frequency point after leaving the connection state.LTE supports intra-system redirection and bidirectional inter-system redirectionCommunity redirection is divided into based onMeasurementAndNon-MeasurementU when you select measurement-based redirection, after receiving the measu

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

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 (

counted). In practice, the bler of a specific percentage (such as the bler of the data channel in LTE is required to be less than 10%) is not always necessary, because the wrong block can be re-transmitted and a special processing (such as a soft merge, etc.) is used to make the receiving side correctly solve the received data. When the bler needs to be measured and calculated, it can be done at the sending end because the Bler can be computed by the

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

sequence with a code rate of 1/2 is obtained if it is deleted, and the code rate is 1/3 if not deleted. In 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 sh

-configpusch in cell physicalconfigdedicated are carried to the UE, as shown in Figure 4. (Fig. 4) If the current LTE system supports the DCI3 format, then RRC needs to configure Tpc-pdcch-config parameters for the UE in the cell. Since each TPC command unit of DCI3 corresponds to 1 UE, the same pucch-tpc-rnti and Pusch-tpc-rnti values can be configured for several different UE. For example, UE1, UE2, UE3 these three UE, configured to their pusch-tp