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Why do they call it LTE?

LTE, which stands for Long-Term Evolution, is a standard and technology for wireless broadband communication. The name “Long-Term Evolution” reflects the goal of evolving and advancing the capabilities of mobile communication networks over an extended period. To understand why it’s called LTE, let’s delve into the historical context, technological evolution, and key objectives associated with … Read more

Why CP is needed in OFDM?

In Orthogonal Frequency Division Multiplexing (OFDM), the Cyclic Prefix (CP) is a crucial element that serves multiple purposes, contributing to the effectiveness and robustness of the communication system. OFDM is a widely used modulation technique in modern wireless communication systems, and the inclusion of a cyclic prefix enhances its performance in the presence of channel … Read more

Why are cells barred in LTE?

Cell barring in LTE (Long-Term Evolution) networks is a mechanism used to restrict or prevent access to specific cells for User Equipment (UE) in certain scenarios. This feature is implemented to optimize network performance, manage congestion, and ensure the efficient utilization of resources. Cell barring is typically employed in situations where allowing access to certain … Read more

Why do we use Ifft in OFDM?

The use of Inverse Fast Fourier Transform (IFFT) in Orthogonal Frequency Division Multiplexing (OFDM) is a fundamental aspect of the modulation scheme, playing a crucial role in transforming the data from the frequency domain to the time domain. Understanding why IFFT is used in OFDM requires examining the key principles and advantages associated with this … Read more

Who makes the handover decision in LTE?

In LTE (Long-Term Evolution) networks, the decision-making process for handovers involves various entities working together to ensure seamless connectivity as a User Equipment (UE) moves within the network. The handover decision is a critical aspect of maintaining a reliable and efficient connection. The entities involved in making handover decisions in LTE include the UE, the … Read more

Which interface is required for CSFB in LTE?

Circuit-Switched FallBack (CSFB) is a mechanism in LTE (Long-Term Evolution) networks that enables the transition from the LTE network to a legacy circuit-switched network (2G or 3G) to facilitate voice calls. CSFB is crucial for LTE networks that initially focused on providing high-speed data services but needed a solution for voice calls, which were traditionally … Read more

Which is faster NR or LTE?

The comparison between 5G New Radio (NR) and Long-Term Evolution (LTE) involves various factors, and their relative speed depends on several considerations. It’s important to note that both NR and LTE are part of the broader evolution of mobile communication technologies, with 5G (NR) being the latest generation. The speed comparison between NR and LTE … Read more

Which protocol is used to carry user plane data in LTE?

The User Plane in LTE (Long-Term Evolution) is responsible for carrying user data traffic between the User Equipment (UE) and the Evolved Packet Core (EPC) network. The protocol used for carrying user plane data in LTE is the GTP-U (GPRS Tunneling Protocol – User Plane). GTP-U (GPRS Tunneling Protocol – User Plane): Definition: GTP-U is … Read more

Which header is compressed in VoLTE call?

In Voice over Long-Term Evolution (VoLTE) calls, header compression is an essential mechanism to optimize the transmission of signaling and voice packets over the LTE network. Header compression reduces the overhead associated with packet headers, improving overall efficiency and conserving network resources. The main header compression protocols used in VoLTE calls are Robust Header Compression … Read more

Which are the main LTE standards for the unlicensed bands?

LTE in unlicensed bands refers to the deployment of Long-Term Evolution (LTE) technology in frequency bands that are traditionally unlicensed, such as the 5 GHz band. The utilization of unlicensed spectrum aims to enhance overall network capacity and meet the increasing demand for wireless data. Several standards and technologies have been developed to enable LTE … Read more