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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
14,835
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
22,182
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
26,482
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
35,991
CoMP 시나리오는 3GPP Release 11과 Release 12에서 정의하고 있는데요1,2, CoMP 적용 영역이 Release 11에서는 Intra-eNB & Ideal Backhaul로 제한되고, Release 12로 가면 Inter-eNB & Non-ideal Backhaul로 확장됩니다. NGMN에 따르면, ideal backhaul이란 일반적으로 2.5 usec 이하의 지연과 10Gbps 이상의 capacity를 갖는 backhaul을 말하고, non-ideal backhaul은 5~30 msec (혹은 그 이상)의 지연을 갖는 backhaul을 말합니다3. Release 11에서는 4개 시나리오가, Release 12에서는 3개 시나리오들이 정의되어 있는데, 여기서...
08/12/2014
18,115
지난 블로그들에서 살펴본 ICIC와 eICIC에 이어 이번 글에서는 또다른 LTE-A의 셀간 협력 기술인 CoMP를 살펴보겠습니다. LTE/LTE-A 초기 단계에서는 최고 속도가 얼마인가가 사업자에게 중요한 marketing point가 되지만, LTE 가입자와 트래픽이 증가함에 따라 최고 속도보다는 실제로 사용자가 느끼는 Quality of Experience (QoE)를 만족시키는 것이 중요해집니다. 예를들면 속도가 뚝 떨어지는 셀 경계 (cell edge)에서 사용자의 throughput을 높이는 것이지요. 무선망 용량 증대는 주파수 효율 (spectral efficiency)을 향상시킴으로써 이뤄집니다. 주파수 효율 (bit/sec/Hz)이란 단위 주파수 (Hz) 당 전송율 (bps)...
07/25/2014
33,109
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 (jongheonlee@hfrnet.com), 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
43,251
1. Traditional RAN Architecture and Issues 1.1 Issue No. 1: Degraded service quality and network performance due to inter-cell interference 1.2 Issue No. 2: Increased costs of building and operating cell sites 2. Degradation of service quality and network performance due to inter-cell interference: Prevented by reducing X2 distance 3. Costs of building and operating cell sites: Reduced...
04/16/2014
38,512
최근 몇년동안 스마트폰이 활발히 보급되어 현재 이미 일상화되었고 또한 갈수록 고성능화되어 멀티미디어 처리기능이 놀랍도록 향상되고 있다. 단말의 발전과 더불어 고성능화된 단말상에서 즐길 수 있는 비디오, 음악, 사진 등의 컨텐츠도 하루가 다르게 대용량화해가고 있다 (비디오 경우, 해상도 SD (480p) → HD (720p) → 현재 Full HD (1080p). 인코딩율 500Kbps → 1Mbps → 2Mbps → 현재 4~8Mbps). 이로 인해 이동통신사업자의 망에서 데이터 트래픽은 폭증하고 있으며 이러한 추세는 앞으로 더욱 심화되어 갈 것이다(Not Voice, But Data ! 음성트래픽은 소량이고 이미 정체됨, 데이터 트래픽은 대용량이고...
04/10/2014
30,861
3G Subscribers (3) 4.5G (1) 4G LTE (2) 5G (216) AI (11) ALTO (3) AR (3) ARP (9) AT&T (5) Akamai (16) Authentication (13) BT (5) Backbone (11) Backhaul (6) Big Data (4) Blockchain (3) Bridging (7) C-RAN/Fronthaul (54) CDN (47) CIoT (2) CPRI (13) Carrier Aggregation (7) Carrier Ethernet (11) Charging (3) China (1) China Mobile (5) Cisco (10) Cloud (6) Cloud Optimization (2) CoMP (11) Comcast (3) Connected Car (4) DHCP (15) DNS (18) Data Center (29) EDGE (28) EMM (14) EPS Bearer (8) Edge (1) Edge Computing (1) EoMPLS (4) EoS (4) Ericsson (3) Ethernet (9) FTTH (20) Femto Gateway (2) Fronthaul (1) GSLB (6) GiGAtopia (4) Gigabit Internet (60) Google (29) Google Global Cache (11) Google TV (2) HLS (10) HSDPA (2) HTTP (8) HTTP Adaptive Streaming (23) HTTP Progressive Download (7) Handover (12) Huawei (3) IEEE 802.1 (5) IGMP (5) IP (7) IP Allocation (14) IP Routing (32) IPSec (5) IPTV (88) IS-IS (1) IoST (5) IoT (120) KT (140) Korea (28) Korea ICT Market (20) Korea ICT Service (15) Korea ICT Vendor (3) L3 Switch (5) LG U+ (71) LSC (1) LTE (276) LTE Frequency (4) LTE Subscribers (4) LTE-A (34) LTE-A Pro (1) LTE-B (1) LTE-H (2) LTE-M (4) LTE-U (8) LoRa (13) MEC (32) MPLS (29) MPTCP (5) MWC 2013 (2) MWC 2015 (12) MWC 2016 (3) MWC 2017 (1) Metro Ethernet (24) Mobile IP (2) Mobile IPTV (3) Multi-Screen (7) Multicast (8) NAT (9) NB-IoT (12) NTT Docomo (3) Netflix (18) Network Protocol (119) Network Recovery (8) Network Slicing (7) New Radio (10) Nokia (1) OSPF (7) OTT (52) Openflow (2) Operator CDN (10) P2P (6) PCRF (3) PIM-SM (2) PS-LTE (3) Platform (2) Pooq (3) QoS (18) RCS (5) RRH (1) Request Routing (7) Roaming (1) Router (8) SD-WAN (34) SDN/NFV (135) SIM (1) SK Broadband (5) SK Telecom (120) Samsung (11) Security (28) Self-Driving (4) Shortest Path Tree (2) Small Cell (7) Spectrum Sharing (3) Switching (6) TAU (7) TPS (13) Transcoding (3) Transparent Caching (17) UHD (15) VLAN (3) VPLS (7) VPN (10) VR (5) Verizon (4) Video Optimization (5) Video Pacing (5) Video Streaming (58) VoLTE (11) VoWiFi (3) WAN Optimization (3) Wholesale CDN (7) Wi-Fi (74) WiBro(WiMAX) (4) Wideband LTE (3) YouTube (36) blockchain (1) eICIC (2) eMBMS (8) ePDG (8) iBeacon (1) security (1) telecoin (1) u+ tv G (5) uCPE (2) 로컬 5G (1)