Monday, 19 October 2020

5G Infrastructure in South Korea

The three South Korean operators made a history when they all launched 5G network simultaneously, thereby making South Korea the first country with all operators having launched 5G.

Samsung's big break in 5G came with them being selected by all the three operators for their 5G networks. Now they have written a three part blog and a whitepaper to highlight the progress of 5G in Korea. Links as follows:
  • Key Drivers for Korea's 5G Success (Part One)
  • Key Drivers for Korea's 5G Success (Part Two)
  • Key Drivers for Korea's 5G Success (Part Three)
  • White Paper: Optimized 5G Solutions that deliver on the Promise of 5G
Even with all the progress, it is not a smooth sailing for 5G in S. Korea. A recent report in the newspaper Korea Herald said that More than half a million 5G network users returned to 4G. The article explained:

The figure -- 562,656 users who downgraded from their 5G subscriptions -- accounts for 6.5 percent of the total 5G network subscribers in South Korea, according to the report by Rep. Hong Jung-min, who belongs to the Science, ICT, Broadcasting and Communications Committee at the National Assembly.

The number of 5G network users as of end-August was 8.65 million in South Korea.

The lawmaker pointed out in the report released in time for the Assembly audit that many 5G users have gone back to the lower-speed network service as the high-priced new network system failed to offer quality connection and coverage.

Here is a video from Samsung showing the Snapshot of Korea 5G

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Monday, 12 October 2020

Different Types of Ethernet Cables in a Mobile Network

Ethernet cables play a big part in a networks. The servers, routers, switches and other physical nodes are still connected with the humble ethernet cables. They have undergone some changes as well. 

From Cat-3/Cat-5, we are now starting to use Cat-7/Cat-8 cables because of the amount of data that needs to move between different nodes, especially with 5G. 

Here is a short and simple video explaining everything you need to know about Ethernet cables.

You can also find some more detail in this Electronics notes article here.

Monday, 5 October 2020

Softbank Demoed Drone Wireless Relay System

Back in 2016, I was involved with doing testing using drones and Helikite with the UK operator EE. You can read more about that here. Since then, many different operators have tested the use of drones mainly for disaster recovery kinds of scenarios. The Japanese operator Softbank recently tried the same.

The press release from them provided the following details:

When typhoons, earthquakes, landslides and other types of natural disasters strike, mobile phones serve as an important lifeline for people to get information and to stay in touch with their family, friends and colleagues. SoftBank Corp. recognizes the importance of restoring communications lifelines quickly, and is engaged in developing and building systems for disaster preparedness.

One such service restoration initiative SoftBank has been working on is the “Drone Wireless Relay System.” On August 31, 2020, SoftBank demonstrated the solution for the press at Katsuma Radio Control Airstrip in Ichihara City, Chiba Prefecture, just east of Tokyo.

Thanks to their portability and ease-of-use, drone-based wireless relay base stations are showing promise as a means of providing connectivity when outages occur in the wake of natural disasters. SoftBank has been working with theTokyo Institute of Technology (Tokyo Tech)’s Department of Electrical and Electronic Engineering since 2019 to conduct research on drone-based wireless relay systems that use a wired power feed.

SoftBank’s drone-based relay base station rises to an altitude of 100 meters, covering a 10km radius. The drone can be transported in a small vehicle and is easy to set up. Compared to another SoftBank network recovery solution, the moored-balloon relay system, the time to deployment is much shorter. In addition, the wired power supply allows the drone to fly continuously for three days or longer, making it suitable for operations over the short- to medium-term.

The moored-balloon wireless relay system is capable of lifting wireless relay equipment to an altitude of 100 meters, covering a five-kilometer radius in open terrain. SoftBank 3G (mobile phone) (2.1 GHz band) voice communications and packet transmissions (email, Internet, etc.) can be used within the coverage area. We are also conducting trial tests of a new moored-balloon wireless relay system for SoftBank 4G LTE that can be deployable from ships, as part of our efforts to continuously improve this system.

A video from the recent drone event is as follows:

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