The former CEO at South Africa’s MTN Group has denied claims that he authorised the payment of bribes to government officials to help secure a GSM operator license in Iran. The company is currently being sued by Turkcell after it claims that its license was confiscated and awarded to MTN after bribes were paid by … Read more
Satellite operator, Inmarsat has reported that a further payment due from USA based LTE network, LightSquared has been missed. The company reported a previous non-payment back in February. A scheduled payment of US$29.6 million that was due on 31 March 2012 has not been made. The payments related to a co-operation agreement by the two … Read more
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 runs in the eNodeB and in the UE. The H-ARQ is based on ACK/NACK messages … Read more
How DL Channel works in LTE? The PDCCH, Physical Downlink Control Channel, allocates the DL and UL resources.There is one PDCCH per sub-frame. It helps the UE retrieve the transport blocks from the PDSCH: Allocated RB Modulation and Coding Scheme (MCS) Multi-antenna transmission PDCCH Shared between all UE of the cell Each TTI contains an … Read more
LTE : Data Transmission in DL In Long-Term Evolution (LTE), data transmission in the Downlink (DL) involves the transfer of user data from the Evolved NodeB (eNB) to the User Equipment (UE). The LTE DL is designed to provide high data rates, low latency, and efficient spectrum utilization. Here’s an overview of the key aspects … Read more
UE categories in LTE These UE categories are often referred to as UE classes. The low end UE does not support MIMO but the high end UE will support 4×4 MIMO Whatever category a UE belongs to, it has to be capable of receiving transmissions from up to four antenna ports. This is because the … Read more
In LTE (Long-Term Evolution), traffic operations involve the management of data traffic within the network, ensuring efficient communication between User Equipment (UE) and the Evolved Packet Core (EPC). Here’s an overview of traffic operations in LTE: Data Transmission: LTE supports high-speed data transmission, enabling a variety of services such as web browsing, video streaming, and … Read more
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 layer protocol configuration, etc.). The Allocation and Retention Priority (ARP) primarily allows one to decide whether a bearer establishment request can … Read more
How Physical channel of LTE works in UL & DL? A distinction has to made between: The Physical channel The Physical signal The DL physical channels are: Physical DL Shared Channel (PDSCH) It is a shared channel used to carry user data, radio & core network, system information (BCH), paging message. Physical DL Control Channel … Read more
From the Transport to the Physical Channel in LTE Transport channels are then mapped on the physical channels which are sent over the air interface A CRC is calculated and appended to each TB. It allows the receiver to detect errors. It is used by retransmission mechanisms like H-ARQ Depending on the Transport Format and … Read more