4G LTE

Here I write on How Inter-RAT Mobility performs in LTE, means Handover to LTE and Mobility from LTE. Handover to LTE Procedure for handover of LTE is largely the same as the handover procedure in LTE. The main difference is that the handover to LTE AS a whole-configuration must be signaled, and the LTE it … Read more

Here I write some small notes on connection Re-Establishment procedure in LTE. In a number of cases of failure (eg failure of radio link failure of teaching RLC unrecoverable error, failure of compliance reconfiguration), the procedure for restoring EU RRC connection, provided that security is active. If security is not enabled, when one of the … Read more

lets talk about LTE Architecture- SERVICE, EPC, E-UTRAN and User Equipment. In the LTE network is divided into 2 basic networks, namely: 1. EUTRAN (Evolved Universal Terrestrial Radio Access Network) 2. EPC (Evolved Packet Core) SERVICE IP Multimedia Subsystem (IMS) is a good example of cars that can be used in the service layer connectivity Services … Read more

Access The LTE Network LTE access network and E-UTRAN, the network comprises a eNodeBs, as shown in Fig. For the normal user traffic (as opposed to transmission), there is no centralized controller in E-UTRAN, thus, E-UTRAN architecture is called flat. The eNodeBs are usually inter-connected together through an interface known as X2, and the EPC … Read more

How Procedures Non-access (NAS) in LTE NAS procedures, especially procedures for managing connections, essentially similar to UMTS. Main change UMTS is that the EPS allows the union of certain procedures to ensure a more rapid establishment of communication and media. MME creates a context of the UE, when the UE is turned on and attaches … Read more

CN (SAE called EPC) is responsible for the overall monitoring of the UE and the establishment media. Main logical nodes of the EPC are: PDN Gateway (P-GW) Serving GateWay (S-GW) Mobility Management Entity (MME) Evolved Serving Mobile Location Centre (E-SMLC) In addition to these nodes, EPC also includes other logical nodes and functions like a … Read more

A Brief notes on LTE Network Architecture The EPS provides a user with an IP connection to PDN for Internet access, as well as to run services, such as VoIP. EPS bearer is usually associated with QoS. Some carriers may be installed to the user, in order to ensure that the various different streams or … Read more

Passive device bi-directional couplers and combiners. Splitters route signals different frequencies that are present on the same supply line into separate lines for each frequency. Adders perform the same function in reverse order. They accumulate signals of different frequencies that are present on separate feed lines on one channel line. They support the nominal impedance of … Read more

The Various steps to control inter-system interference include: 1. external Filters, add the transmitters and receivers 2. Antenna isolation between transmitters and receivers of victims 3. the distance between transmitters and receivers of victims 4. Reduce transmission power 5. Guard band between operators Step 1 is probably the most common technical solutions. This can have … Read more

Management of external interference from all other sites/sectors improves system performance and capacity. Intervention studies are used to examine areas that have significant peripheral interaction problems. Lighting and intervention studies are analysis to determine what sites/sectors of intervention problem (i.e. determining what sites/sectors may be providing too much interference in the field or sites/sectors that … Read more