#lte network

VoLTE ce este si cum functioneaza apelurile G HD Voice What is VoLTE and why does your phone display the “VoLTE” icon during calls? Many users see the symbol but never truly understand what it does or why it matters. VoLTE stands for Voice over LTE. It allows voice calls to be transmitted over a 4G LTE network instead of traditional 2G or 3G infrastructure. But the real explanation goes deeper…

Do you know why you receive SMS messages even you aren’t actively using your phones? This is due to the Network Triggered Service Request. In LTE network, this type of request is made when the network has downlink traffic to deliver to a UE in Idle mode. Here’s how it works roughly:

· Missed Delivery: The network (SGW) sends data to the UE, but the UE is unavailable to receive it (e.g., screen off). · Notification: The base station (eNB) detects the failed delivery and informs the network core (MME) through a Downlink Data Notification message. · Paging: The MME initiates paging by sending a message to the eNB, instructing it to signal the UE to wake up and check for service requests. · UE Response: Upon receiving the paging signal, the UE responds with a Service Request message, indicating it’s ready to receive data. · Data Retransmission: The network (SGW) re-sends the original data to the UE now that it’s awake and responsive.

You can read detailed technical explanation by clicking here.

Also don’t hesitate to review our related posts on: · The procedure of UE-Triggered Service Request: https://www.linkedin.com/posts/iplook_iplook-procedure-steps-activity-7046786462473715712-wCG9?utm_source=share&utm_medium=member_desktop · The procedure of paging: https://www.linkedin.com/posts/iplook_paging-steps-upf-activity-6916682628720975872-f4z2?utm_source=share&utm_medium=member_desktop

The RAN Interfaces are requiring the need to be Open. Even though the networks use 3GPP Interfaces that are already open and standardized the need for the O-RAN Interface has acquired more importance.

The two most important elements of the RAN Interfaces in 3GPP are the Fronthaul Interface and the X2 Interface.

Earlier when the service providers saw the cost advantages to pool their baseband units in a central location to serve the antennas on many towers, the Fronthaul Connection was established. Using the CPRI Protocol, the Fronthaul Interface is between the BBU Software (DU/CU) that runs on the COTS server and the Remote Radio Head (RU). Because of the CPRI protocol, there were some vendor-specific implementations, high bandwidth, and latency variations constraints hindering the objective to be “Open”. With O-RAN Interfaces, we can have different “Open Alternatives” so that the vendors can use 5G and also other ethernet-based open frothaul.

The second reason being the optional interface, X2 linked between two eNodeBs in the LTE network makes it difficult for the operator to deploy the multi-vendor network as the RAN Vendors will have to use proprietary messages.

Therefore the X2 interfaces need to be open so that the 5G RAN can be accessed by working in conjunction with the 4G LTE access network and 4G Core.

Since the Open RAN unfolds the multi-vendor RAN system and introduces more software into the telcos’ networks it helps in reducing their cost and diversifying their supply chains. This is why the O-RAN constantly demands interoperability and requires validation.

Therefore, we at Simnovus help you to validate the 5G RAN by bringing our software mindset to it. With our UE Simulator Software (runs on COTS and SDR) you will get predictable budgeting as you take the advantage of subscription licensing. All the current features including 3GPP updates will be delivered at no cost while your subscriptions are active.

All your testbeds are full-featured and consistent as our Simulator Software is all-inclusive.