Before we begin.. On March 10th, the Ministry of Science, ICT and Future Planning (MSIP) of the South Korea announced it would adjust the output power in unlicensed 900MHz band from the current 10mW to 200mW as an effort to stimulate the emerging IoT-related industry. The big 3, fueled by the announcement, are aggressively seeking ways to deploy IoT infrastructure. On March 18, SK Telec...

Around this time of year, network operators and vendors are in fierce competition in introducing innovative next generation technologies and services with Mobile World Congress (MWC) fast approaching. This year, KT and SK Telecom have already been battling to present the world's first 5G technologies and services faster. On February 15th, with the MWC 2016 just one week away, Mr. Sun...

Weeks ago on August, 4th, SK Telecom introduced commercial HP server-based EPC (4G Core) in its commercial network for the first time in Korea. This allows heavy smartphone traffic to be handled by the existing EPC-dedicated equipment, and light IoT traffic to be handled by this new HP server-based EPC. EPC (Evolved Packet Core) equipment is one of the key elements of network equipment. M...

It has been over a year since KT Chairman Hwang Chang Kyu’s declaration of his vision GiGAtopia on May 20, last year. The main idea of GiGAtopia was that the company would make both of its wired and wireless networks giga-class, through investment of KRW4.5 trillion for three years to come. We thought it would be a good time to check how they did for the past one year, and what innovation...

For the rest of the Q3 2015 issue of Korea Communication Review magazine please click here In its second demonstration of LTE in Unlicensed spectrum ("LTE-U", LAA in 3GPP term) conducted last month - 7 months after its first demonstration where it showed 300 Mbps through CA of 20 MHz at 2.6 GHz and another 20 MHz at 5.8 GHz, LG U+ successfully achieved 600 Mbps through carrier aggregation (C...

For the rest of the Q2 2015 issue of Korea Communication Review magazine please click here As a sequel to the previous post (KT's demonstration of LTE-H and LTE-U), this post will introduce another pre-5G/5G technology, LTE-TDD, showcased by KT at MWC 2015, covering three relevant demonstrations: 9-carrier CA, LTE-UL/DL CA, and triple mode cell. 3. LTE-B (LTE-Beyond) Figure...

For the rest of the Q2 2015 issue of Korea Communication Review magazine please click here 6 things you should know about enterprise WLAN IEEE 802.11 wireless LAN (“WLAN”) technology, commonly...

For the rest of the Q1 2015 issue of Korea Communication Review magazine please click here 3. 5G Strategies by LG U+ LG U+, acknowledging service as a more important factor in 5G than speed, is putting more efforts into developing differentiated services than mere technologies competition. That is, it is taking a stance that it would develop 5G services first, and then take care of t...

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...

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...

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...

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...

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...

Google Global Caches (GGCs) have already been deployed in many telecom operators' data centers around the world, caching YouTube video files like Psy's Gangnam Style for the local users. This allows people around the globe to watch Psy singing and dancing without buffering through their local GGCs. Korean operators like SK Telecom, LG U+ and KINX have also made the same move in February...

In our previous post (Analysis of LG U+'s HDTV Streaming (LG U+ HDTV Service based on LTE-A), we discussed how LG U+ Mobile U+ HDTV service delivers video files to a device. Our first actual measurement confirmed that LG U+: used HLS, Apple's adaptive streaming (delivering video files chunkwise, unlike progressive download or RTMP/RTSP); and offered three profiles (quality levels)...

Last week (March 27, 2013), KT, No. 1 telecommunications company in Korea with annual revenue of $22.3 billion in 2012, has entered into an agreement with Akamai, the world's No. 1 CDN service provider with annual revenue of $1.37 billion in 2012, for using Akamai's Managed CDN services. Since 2012, world's leading CDN service providers including Akamai, Limelight, Edgecast, etc. ha...

이번 시간에는 Akamai의 SureRoute 기술에 대해서 소개해 드리도록 하겠습니다. BGP based Routing 각 나라에는 하나 이상의 통신사업자(ISP: Internet Service Provider)가 존재하고 각 통신사업자간에는 BGP(Border Gateway Protocol) 프로토콜을 통해 라우팅 정보를 교환하여 전 지구가 하나로 연결되는 Internet이 만들어 집니다. 그리고 BGP를 통해 통신사업자간에 라우팅 정보를 교환할 때, 통신사업자를 식별할 수 있는 인자로 AS(Autonomous System) 번호가 함께 전달되어 해당 목적지로 패킷을 전달하기 위해 몇개의 통신사업자(AS)를 거쳐야 하는지 알 수 있게 됩니다. (이를 AS-PATH라 함) 아...

손장우 @ Netmanias (tech@netmanias.com) 최근의 Metro optical networking분야의 동향과 기술을 정리한 자료입니다. 내용은 3 part로 나누어져 있으며 Metro가 각광 받는 이유를 기술적인 측면, 시장 조사기관의 메트로에 대한 Market estimation, 인수합병 동향, VC의 투자 동향들을 살려보고, Metro의 병목을 해소하기 위해 제시되고 있는 기술들에 대해 살펴봅니다. 이 기술들은 크게 LAN에서 사용되던 Ethernet에 새로운 기능을 추가하여 Metro로 나가자는 Metro Optical Ethernet, WAN에서 적용되던 DWDM을 Metro 환경에 맞게 채널수를 줄이고 다양한 인터페이스를 갖도록 변경한 Metro DWDM, 그리고...

국내 5G 특화망 (이음 5G) 사업자: 네이블 커뮤니케이션즈 1 네이버클라우드 (2) 2 LG CNS (4) 3 SK네트웍스 (4) 네이블 (2) 5 CJ올리브네트웍스 (2) 6 KT MOS 북부 (3) 7 세종텔레콤 (3) 8 위즈코어 (5) 9 뉴젠스 (4) 10 현대오토에버 (1) 11 LS일...

손장우 (Harrison Jangwoo Son) 넷매니아즈 | (주)엔앰씨컨설팅그룹 대표이사 son@netmanias.com <AR 가이드 흉부 수술, 비대면 협진 시스템 구조 - 이대목동병원사례> 네이블커뮤니케이션즈(5G 특화망 사업자, 실증 총괄), SKIA[1](AR가이드 수술 솔루션), 삼성 SDS(5G 특화망 장비 공급) 등은 2022년 12월에 이대목동병원에 4.7GHz의 특화망 주파수를 이용해 5G 특화망을 구축하고 Breast Surgery AR 가이드 수술 서비스와 비대면 협진 서비스를 실증했다[2]. ① Breast Surgery AR 가이드 현재는, 유...