Handover Events in LTE

Normally LTE UE makes radio measurement in two stages which are idle and connected states. In idle state mode the measurement is used for cell selection and cell re-selection. In connected state mode, the measurement is used for handover and READ MORE

Carrier Aggregation

Until 3GPP Release 10, we could achieve maximum 150 Mbps downlink throughput with 20 MHz bandwidth, but in 3GPP Release 10 a new mark of LTE was introduced where several frequencies can be aggregated. The new mark of LTE was READ MORE

Long Term Evolution

Long-Term Evolution or with abbreviated version LTE is a standard for high-speed wireless communication. It is based on the GSM/EDGE and UMTS/HSPA technologies. First step of LTE starts from 3GPP Release 8. Currently we can see three marks of LTE which are separated from each other according to the READ MORE

OFDMA

Orthogonal Frequency Division Multiple Access or with abbreviated version OFDMA is a methodology of digital data, that a signal is splitted into multiple carrier frequencies (subcarriers). OFDMA is a multi-user version of OFDM scheme. OFDMA allows multiple users to transmit READ MORE

RSRQ

Reference Signal Received Quality or with abbreviated version RSRQ is quality of the received signal. Here the “received signal” is reference signal (RSRP). But, how do we see the RSRQ value as negative in drive-test tools and why do we READ MORE

RSRP

Reference Signal Received Power or with abbreviated version RSRP is linear averaged signal strength of Reference Signal. The Reference Signal is carried by Resource Elements (RE). RSRP is used for cell selection, cell reselection and handover purposes in LTE. It READ MORE

HARQ & ARQ

If the erroneous packets are received by eNodeB or UE in radio interface, what kind of action will be taken? In intelligent technology there should be a mechanism to solve this issue. And there is, which is Hybrid Automatic Repeat READ MORE

TTI Bundling

HARQ is a technique where receiver gets and combines the new transmitted data with previous erroneous data, but not all the time this method is convenient if the UE is in poor radio condition. Transmitter needs to re-transmit the data READ MORE

UE Inactivity Timer

When the eNodeB detects a UE which does not have any traffic to send and receive during a defined period of time, usually referred to an inactivity timer (20s, 10s etc…) which is defined in eNodeB and also is configurable, READ MORE

RAN Sharing

During the network deployment by the operators they face with a lot of difficulties such as high deployment costs, expensive spectrum license fees , site acquisition issues, and etc., but with eNodeB Hardware sharing between different mobile operators they can READ MORE