Tag : enodeb

Radio Bearer in LTE

Radio Bearer in LTE

There are 2 types of Radio Bearers (RB) in LTE:  To carry signaling. There are called the SRB (Signaling Radio Bearer) To carry user data. There are associated with an EPS Bearer In LA1.X,
Random Access Procedure in LTE

Random Access Procedure in LTE

When the UE has obtained system information, it has to request an RRCconnection. Like it has no dedicated resources, the UE requests the connection using the Random Access Procedure using common uplink resources.  At
MIMO Multi User in LTE

MIMO Multi User in LTE

MIMO-MU = Multi user It is used only in Uplink. MIMO-MU does not increase the individual user’s data rate but it does offer cell capacity gains that are similar to, or better than, those
H-ARQ Mechanism in DL

H-ARQ Mechanism in DL

1. The Transport block is transmitted to the UE on the PDSCH. 2. The UE receives it but it is erroneous. The TB is stored in a buffer. 3. The UE transmits directly a
what is Radio Retransmission in LTE?

what is Radio Retransmission in LTE?

The radio retransmission mechanism is called Hybrid Automatic Request (H-ARQ). H-ARQ allows to retransmit fastly erroneous blocks between the eNodeB and the UE. It avoids long retransmission between 2 TCP layers. The H-ARQ process
Traffic Operation Overview in LTE

Traffic Operation Overview in LTE

DL Data Transmission in LTE UL Data Transmission in LTE DL and UL schedulers are running in the eNodeB.  From the following inputs, the eNodeB schedules the data on the air interface and indicates
QoS Parameters of LTE

QoS Parameters of LTE

The QoS Class Identifier (QCI) is a scalar that is used as a reference to access node-specific parameters that control bearer level packet forwarding treatment (e.g. scheduling weights, admission thresholds, queue management thresholds, link