SK Telecom on September 12th announced that together with Nokia, it has successfully implemented the world’s first cloud-based SDRAN (Software-Defined RAN) - also known as Cloud RAN - over a real commercial LTE network through a demonstration performed in its Network IT Convergence R&D center. "SK Telecom today announced that together with Nokia, it has successfully implemented the...

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...

KT IPTV (4K UHD) Service (1) UHD Live TV (2) 'Most Popular Channels Now' (9-Channel View) (3) 4-channel View (4) UHD VoD You probably have been switching channels, looking for something interesting to watch, until you finally settle down for one. For viewers like you, KT offers a new way of selecting channels through a service called "Most Popular Channels Now". At the company...

For the rest of the Q3 2015 issue of Korea Communication Review magazine please click here Hear from CTO of Korean Telcos 1. Dr. Dongmyun Lee, CTO of KT: Leading 5G through wired/wireless Integration ► 2. Mr. Changwoo Lee, CTO of LG U+: LG U+'s Mobile Network Evolution Strategies 3. Dr. Jingsung Choi, CTO of SK Telecom: SK Telecom's 5G Evolution Strategies...

For the rest of the Q2 2015 issue of Korea Communication Review magazine please click here At Barcelona's Mobile World Congress (MWC) 2015, KT demonstrated a variety of new 5G, Hetnet and IoT technologies and services. Of all those presented, below we will focus on our most interested topics, WiFi-related pre-5G technology, LTE-Hetnet (LTE-H) and LTE-Unlicensed (LTE-U), and see how t...

For the rest of the Q2 2015 issue of Korea Communication Review magazine please click here Contela, a leading Smallcell solution provider based in Korea, introduced its new Smallcell solutions at MWC 2015. The company has provided SK Telecom, a Korean network operator, with LTE Femtocell solutions through years of cooperation with SK Telecom. At MWC, Contela presented three wire...

As noted in the previous post, currently there are two types of user authentication in the Wi-Fi networks operated by Korean operators: IEEE 802.1X-based and captive portal-based authentication. 802.1X-based authentication targets primarily mobile devices with an operator's USIM card, whereas captive portal-based authentication to be discussed here is used to attract users without a permane...

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...

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...

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...

This time we will give you a brief overview of an LTE Tracking Area (TA) and Tracking Area Update (TAU). While an LTE device (UE) is in active state (i.e. while communicating, or while in EMM-Registered/ECM-Connected/RRC-Connected state in LTE terms), its location is known by the LTE network at cell level (i.e. on a cell granularity), e.g. in cell2 in eNB1. However, while the UE is in idl...

Obviously, the hottest issue in mobile communication today is LTE. All three top telecommunication operators in Korea are trying hard to promote their brands, each containing the technical term "LTE" somewhere, for greater exposure of the brands to the public. So, we will briefly go over what network elements make the LTE network today. The Figure below is an illustration of an LTE Network R...

This time we will give you a brief overview of an LTE Tracking Area (TA) and Tracking Area Update (TAU). While an LTE device (UE) is in active state (i.e. while communicating, or while in EMM-Registered/ECM-Connected/RRC-Connected state in LTE terms), its location is known by the LTE network at cell level (i.e. on a cell granularity), e.g. in cell2 in eNB1. However, while the UE is in idle...

Obviously, the hottest issue in mobile communication today is LTE. All three top telecommunication operators in Korea are trying hard to promote their brands, each containing the technical term "LTE" somewhere, for greater exposure of the brands to the public. So, we will briefly go over what network elements make the LTE network today. The Figure below is an illustration of an LTE Network R...

오늘도 네트워크 초보자님들을 위한 코너로써 유선망에서의 QoS에 대해서 설명드리도록 하겠습니다. Network에서 QoS라 함은 (1) 중요한 패킷(예. IPTV, VoIP, Business Traffic)과 그렇지 않은 패킷(예. 일반 인터넷 트래픽)을 구분하고, (2) 망에 Congestion이 발생(1GE 포트로 2Gbps의 트래픽이 나가야 하는 상황)하였을때 중요한 패킷을 먼저 보내 주고, 그렇지 않은 패킷은 drop하는 행위입니다. 오늘은 이 중에 (1)번, 즉 망에서 중요/비중요를 판별하기 위해 패킷을 어떻게 분류하는지에 대해 소개 드리겠습니다. 패킷 분류(Packet Classification)는 아래와 같이 크게 2가지 타입이 존재합니다. Multi-Field(MF) Cl...

Accuver사에서 제작한 일본 Local 5G 기지국 맵입니다. https://5gmap.accuver.jp/에서도 볼 수 있습니다. 매일 업데이트되며, 굉장히 공을 들여 만들었네요. 각 지역을 클릭하면 지역별 로컬 5G 기지국수와 주파수, 면허 취득일 등 자세한 정보를 볼 수 있습니다. 아래 왼쪽의 전국 기지국수 추이를 클릭하면 2020년부터 매월별 누적 기지국 수를 볼 수 있습니다. 아래는 2022년 2월 7일 현재 월별 로컬 5G 기지국 증가 추이입니다. 위 그림의 왼쪽 아래에 있는 전국 기지국수 추이를 클릭하면 현재의 업데이트된 추이가 보여집니다. 2021년 12월에 mmWave 로컬 5G 주파수 면허신청이 개시되었고 2020년 12월에 주파수 특성이 좋은 Sub-6...

주니퍼 네트웍스 WEBINAR 5G 세상에서는 네트워크를 나누어 쓴다고?! 5G DX: E2E Network Slicing 웨비나 08/24/2020 | 한국주니퍼네트웍스 김승환 부장 재생시간: 30분 목차 Market Dynamics 5G DX - E2E NW Slicing - Juniper Strategy

NextEPC (https://nextepc.com)의 이지훈님이 보내주신 5G 기고글입니다. 바쁘신 와중에 유익한 기고글을 보내주신 이지훈님에게 감사드립니다. 이지훈님의 기고글 모두보기 1. 개요 4G LTE 네트워크에서 Evolved Packet Core (EPC)와 유사하게 5G 네트워크에서는 5GC (5G Core)를 정의하고 있다. 하지만 과거 3G/4G와는 달리, 5G 구축시에는 기존 EPC를 이용하거나 또는 5GC를 이용해도 된다. 또한 5GC를 사용하는 단독모드 (Stand-Alone)와 EPC/5GC를 섞어쓰는 혼용모드 (Non-Stand-Alone)의 선택이 가능하여, 최적의 네트워크 진화 방법을 결정하는데 있어 복잡성을 더하고 있다. 2. 단독모드(SA) 5...

지난 2월 평창동계올림픽에서 5G 네트워크 운영과 5G 시범 서비스를 성공적으로 선보인 KT가 3월 22일, 내년 3월 세계최초 5G 서비스 상용화를 공식 선언했다. 3GPP 5G 표준*이 제정되고, 올해 하반기 5G 기기 출시를 시작으로 내년 상반기 5G 스마트폰 출시가 예정되면서 5G 상용화를 향한 통신사간 경쟁이 한층 가열되고 있다. 또한 사용자들도 평창올림픽에서 선보인 타임 슬라이스 (Time Slice), 싱크뷰 (Sync View)와 같은 5G 실감형 서비스를 통해 기존과는 다른 생생한 경기를 체험하면서, 5G가 현실로 다가왔음을 느끼는 중이다. * 3GPP 5G 1차 표준 (Phase 1)인 Release 15 규격은 5G가 LTE와 연동하여 동작하는 NSA (Non...