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World IT Show 2014: LG U+'s Gigabit Internet (LAN and FTTH) Networks - Architecture and...

LG U+ unveiled its gigabit Internet access network solution at the World IT Show 2014 held in Busan on October 20th. The new solution is said to be capable of supporting bidirectional Internet speed of 1 Gbps per user. Unlike its competitors, KT or SKB, the company offers LAN, FTTH and HFC services only, and not XDSL. At the show, LG U+ gave a demonstration of the technology and equipment...

10/29/2014

60,711

Tech-Blog

KT launched GiGA Internet, Korea's first nationwide gigabit Internet service on Oct. 20...

Earlier in May, KT's Chairman Chang-gyu Hwang announced the company's GiGAtopia vision (see What's GiGAtopia envisioned by Chairman Chang-gyu Hwang of KT?). Then soon in June, KT made another announcement that it would commercialize gigabit Internet service in the second half of the year. So, it has been predicted that the company would begin the service probably at the end of t...

10/27/2014

75,628

Tech-Blog

SK Telecom's Network Evolution Strategies (3) - RAN Architecture Evolution Strategy

3. RAN Architecture Evolution Strategies SK Telecom introduced C-RAN right from the very early stages of the LTE service commercialization (January 2012) as an effort to achieve higher mobile network operation efficiency and more cost savings. As a result, most of the company's RAN is now in C-RAN architecture, where macro BBUs are separated from RRHs, and moved to centralized locations...

10/27/2014

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SK Telecom's Network Evolution Strategies (2) - Inter-cell Coordination Evolution Strategy

2. Inter-cell Coordination Evolution Strategies CA improves network capacity by broadening frequency bandwidth, whereas inter-cell coordination technologies do the same task by enhancing frequency efficiency. Inter-cell coordination is designed to manage radio resources more efficiently by having cells in different sites share user and/or cell information with each other. Inter-cell coo...

10/13/2014

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Tech-Blog

SK Telecom's Network Evolution Strategies (1): Carrier Aggregation Evolution Strategy

SK Telecom is the #1 mobile operator in Korea, with sales of KRW 16.6 trillion (USD 15.3 billion) in 2013, and with 50.1% of a mobile mobile subscription market share in 2Q 2014. It launched LTE service back in July 2011, and now more than half of its subscribers are LTE service subscribers, with 55.8% of LTE penetration as of 2Q 2014. Due to LTE subscription growth, more advanced device feat...

10/07/2014

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Tech-Blog

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

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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

73,732

Tech-Blog

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

69,137

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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

70,471

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

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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

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Switching and Routing - Part 3. L2 (Ethernet) Switching by L3 Switch

07/11/2014

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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

58,773

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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

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Switching and Routing - Part 2. Packet Forwarding by IP Router

06/18/2014

72,714

Tech-Blog

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

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Netmanias Interview with HFR - Fronthaul Solutions for LTE/LTE-A C-RAN (Cloud RAN)

HFR is probably most known as a vendor of wired/wireless network equipment like Mobile fronthaul, Carrier Ethernet, FTTx, etc. Today, we are going to hear from Dr. J.H. Lee ([email protected]), CTO of HFR about one of its most popular solutions, flexiHaulTM, a mobile optical access solution. 1. Welcome! Thank you for being with us. Can you tell us a little bit about HFR first?...

05/27/2014

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Tech-Blog