LTE System support for flexible bandwidth like 1.4 MHz, 3 MHz ,5 MHz,10 MHz , 15 and 20 MHz and this bandwidth is the major contributor system capacity. There are some other parameter which affect the system capacity of an LTE eNodeB and given below Channel Bandwidth MIMO Antenna Configuration Modulation Coding Scheme UE radio Condition … Read more
Long Term Evolution (LTE) supports both FDD and TDD Duplex mode. The major difference in TDD and FDD is that in TDD system a single frequency is shared in time domain between Uplink and Downlink where as in FDD separate frequencies are used for Uplink and Downlink transmission. A TDD frame structure is shown in … Read more
LTE- is designed to support peak data rates of 300 Mbps in the downlink and 75 Mbps in the uplink with 4×4 MIMO support along with C-Plane latency less than 100ms and U-Plane latency less than 10ms. Latency is defined as the average time between the transmission of packet and the reception of an acknowledgment. … Read more
What do you think of when you hear word “spectral efficiency?” The answer will come, it has to do with the amount of information that fits in a given channel bandwidth or one just say how efficiently can that piece of spectrum be used to transmit information. Before we digging into the details of spectral … Read more
In a cellular system, handover can be defined as a procedure to transfer a User Equipment (UE) and its context from a source cell to a target cell when source cell signal becomes bad so it handover the UE to target cell to continue the UE session. In LTE, Handover Mobility Support for UEs in ECM-CONNECTED … Read more
The mobile operators are or have moved to voice over LTE (VoLTE). Globally, voice is still the major chunk of ARPU for the telecommunications industry. However, basic voice may not be enough to remain relevant in an LTE environment which is data services by default, because subscriber communication is shifting from plain voice to HD … Read more
The quality of Voice service plays and will play an important role in the evolution of the telecommunication system. Voice subscribers are becoming habitual of Voice over IP (VoIP) services that provide extended audio bandwidth be it Skype or Whatsapp Calling. They also expect the same high quality from mobile voice services. With the maturity … Read more
VoLTE IMS Protocols In IMS subsystem, the critical protocols are the Session Initiation Protocol (SIP), SigComp, Real-time Transport Protocol (RTP), RTP Control Protocol (RTCP) and IP Security (IPSec) and Diameter. These protocols are very important because these are the ones impacted by the UE or have a direct impact on UE operation. In a VoLTE … Read more
NB-IoT or NB-LTE is a new 3GPP radio-access technology. It is not fully backward compatible with existing 3GPP devices however it is designed to achieve excellent co-existence performance with legacy GSM, GPRS and LTE technologies. NB-LTE requires 200 kHz minimum system bandwidth for both downlink and uplink, respectively. The choice of minimum system bandwidth enables … Read more
3GPP has defined a set of frequency bands for which NB-IoT can be used. 3GPP TS 36.101 from Release 13 provides the list of the supported bands: 1, 2, 3, 5, 8, 12, 13, 17, 18, 19, 20, 26, 28, 66 and Release 14 added the bands: 11, 25, 31 and 70. Later, 3GPP Release 15 … Read more