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Private 5G testing using low-orbit satellites (HFR and Starlink)
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Documents
1,231
Reports
48
Technical Documents
76
Tech-Blog
325
One-Shot Gallery
180
Korea ICT News
602
Images
2,988
Korea Communication Review, October 2014
10/06/2014
67,962
Reports
KT aims to build a nationwide GiGA Internet access network (Gigabit Internet) by the en...
On May 20, Chairman Chang-gyu Hwang of KT (with sales of KRW 23.8 trillion in 2013) announced that "KT will open up a new age of GiGAtopia by investing KRW 4.5 trillion (USD 4.4 billion) in GiGA FTTH, GiGA Path (heterogeneous networks convergence technology that combines LTE and Wi-Fi networks), and GiGA Wire (copper wire-based transmission technology) for the next three years." Later on Ju...
09/26/2014
45,211
Tech-Blog
Korean big 3 telcos offer hassle-free and instant upgrade to Giga-class Internet withou...
In the past two years, some new technologies have been introduced in Korea, apparently increasing broadband Internet speeds 3~5 times faster, from 100 Mbps to 300~500 Mbps, instantly. It certainly is fascinating in that such speed improvement was achieved without the hassle of re-cabling construction in apartment buildings. Because 100 Mbps had seemed unbeatable for almost a decade, this sure w...
09/18/2014
64,010
Tech-Blog
Mobile Data Traffic Statistics in Korea (Q2 2014)
08/26/2014
23,514
One-Shot Gallery
LTE Policy and Charging Control (PCC)
Table of Contents 1. Introduction 2. PCC Rules 3. PCC Procedures 4. How Policy Control Affects the Way IP Packet Flows are Handed 5. EPS Entity Information 6. Closing 1. Introduction To use LTE services, a user must purchase an LTE device, sign up for an account with his mobile operator, and then select the service types and plan he wants. Then, to...
08/22/2014
175,667
Technical Documents
CoMP (2): CoMP Coordination Areas Defined in 3GPP (7 Scenarios)
In the CoMP scenarios defined in 3GPP Release 111 and Release 122, CoMP is used within a single eNB (intra-eNB) with ideal backhaul only - in restricted areas in Release 11 among eNBs (inter-eNB) with non-ideal backhaul as well - in more expanded areas in Release 12 According to NGMN3, ideal backhaul refers to one with latency of 2.5 usecs or less and capacity of 10 Gbps or higher, whe...
08/19/2014
60,611
Tech-Blog
CoMP (1): CoMP Types - CS, CB, JT and DPS
Today, we will learn about CoMP, an inter-cell cooperation technology in LTE-A, since we learned about ICIC and eICIC in the previous posts. At an early stage of LTE/LTE-A, offering high speed is the most important marketing point for operators. However, as LTE subscribers and traffic grow, satisfying users with high Quality of Experience (QoE), for example, by improving user throughputs at cel...
08/12/2014
64,644
Tech-Blog
Interference Coordination in LTE/LTE-A (2): eICIC (enhanced ICIC)
Enhanced Inter-Cell Interference Coordination (eICIC) As noted in the previous post about ICIC, we will find out about enhanced Inter-Cell Interference Coordination (eICIC), an interference control technology in LTE-A in this post. In LTE/LTE-A, one key challenge for operators is that they have to increase network capacity to keep up with fast-growing traffic. Especially, crowded areas in m...
08/06/2014
64,159
Tech-Blog
LTE RAN Architecture: Cell site and LTE BS, B/F-Hauling, Coordination, Comparison and C...
08/06/2014
41,602
Reports
Switching and Routing - Part 4. IP Forwarding by L3 Switch
Switching and Routing 1. Switching and Routing for Dummies - Ethernet Switching 2. Switching and Routing for Dummies - IP Routing 3. Switching and Routing - Part 1. Router Architecture 4. Switching and Routing - Part 2. Packet Forwarding by IP Router 5. Switching and Routing - Part 3. L2 (Ethernet) Switching by L3 Switch 6. Switching...
08/01/2014
67,607
Tech-Blog
HFR's Mobile Fronthaul Solutions for LTE-A Era
08/01/2014
42,580
Reports
Switching and Routing - Part 3. L2 (Ethernet) Switching by L3 Switch
Switching and Routing 1. Switching and Routing for Dummies - Ethernet Switching 2. Switching and Routing for Dummies - IP Routing 3. Switching and Routing - Part 1. Router Architecture 4. Switching and Routing - Part 2. Packet Forwarding by IP Router 5. Switching and Routing - Part 3. L2 (Ethernet) Switching by L3 Switch 6. Switching...
07/11/2014
101,665
Tech-Blog
Broadband Access Network Architecture in Korea
07/06/2014
31,681
One-Shot Gallery
Korea Communication Review, July 2014
07/04/2014
65,236
Reports
Why should jitter be minimized in CPRI fronthaul? - frequency accuracy
In this post, we will talk about “jitter” introduced in the fronthaul network of LTE C-RAN. As shown in the figure on the right, jitter refers to the skew or variation in time or phase of a digital signal exchanged between communication systems. This jitter can eventually cause errors during the data and clock recovery process at RRH. Then, why should we be worried about jitter...
07/04/2014
52,403
Tech-Blog
What's GiGAtopia envisioned by Chairman Chang-gyu Hwang of KT? (GiGa FTTH, GiGA Wire, G...
KT’s Vision: GiGAtopia Source: KT What? Chairman Chang-gyu Hwang of KT (with sales of KRW 23.8 trillion in 2013), at a press conference held at KT Olleh Square in Gwanghwamun, Seoul on May 20, announced that "KT will open up a new age of GiGAtopia by investing KRW 4.5 trillion (USD 4.4 billion) in GiGA FTTH, GiGA Path (heterogeneous networks convergence technology that combines...
06/26/2014
76,084
Tech-Blog
Switching and Routing - Part 2. Packet Forwarding by IP Router
Switching and Routing 1. Switching and Routing for Dummies - Ethernet Switching 2. Switching and Routing for Dummies - IP Routing 3. Switching and Routing - Part 1. Router Architecture 4. Switching and Routing - Part 2. Packet Forwarding by IP Router 5. Switching and Routing - Part 3. L2 (Ethernet) Switching by L3 Switch 6. Switching...
06/18/2014
64,481
Tech-Blog
EMM Procedure 10 & 11. Move to Another City and Attach
Table of Contents 1. Introduction 2. EMM Case 10. Move to Another City 3. EMM Case 11. Initial Attach in Another City 4. EPS Entity Information 5. Closing 1. Introduction UE attempts a handover or cell reselection when the received signal strength from its serving cell becomes weak as it moves. If there is no neighbor cell at all near the travelling UE,...
06/11/2014
99,876
Technical Documents
Interference Coordination in LTE/LTE-A (1): Inter-Cell Interference Coordination (ICIC)
As mobile communication technology has evolved dramatically, from LTE (10 MHz) to LTE-A (10+10 MHz), and then to wideband LTE (20 MHz), South Korea's mobile market is hotter than ever with its big 3 operators competing fiercely in speed and quality (see Netmanias Report, LTE in Korea UPDATE - May 1, 2014). Operators can offer different maximum speeds depending on how wide frequency bandwidt...
06/05/2014
81,913
Tech-Blog
Broadband & IPTV in Korea UPDATE - May 1, 2014
06/04/2014
26,813
Reports
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