Search | NETMANIAS

179

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

52,506

Tech-Blog

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 (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

85,315

Tech-Blog

LTE in Korea Update - May 1, 2014

• LTE/LTE-A Commercialization by South Korea’s Big 3 Operators as of April 2014

05/27/2014

31,016

One-Shot Gallery

Evolution of Mobile RAN Architecture in LTE/LTE-A Era (C-RAN)

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

65,233

Tech-Blog

Fronthaul Size: Calculation of maximum distance between RRH and BBU

In C-RAN (Centralized/Cloud RAN), the more RRHs are covered by one CO (BBU hostelling site), i) the fewer COs are required, and ii) the more BBUs can be centralized at one CO. This allows for the most efficient utilization of BBU resources, thereby significantly reducing CAPEX/OPEX. For this reason, the maximum separation distance between RRH and BBU should be secured. This distance is cons...

04/01/2014

70,370

Tech-Blog

C-RAN Classification (1): Coverage-based

C-RAN Classification (1): Coverage-based 1. City-wide C-RAN: Thousands of RRHs (cell) 2. CO-based C-RAN: Hundreds of RRHs (cell) 3. Master Macro site-based C-RAN: Tens of RRHs (cell) 4. Local C-RAN (C-RAN over D-RAN): A few RRHs (cell)

03/26/2014

26,928

One-Shot Gallery

Required CPRI link capacity in function of radio technologies

03/24/2014

35,957

One-Shot Gallery

Why WDM is essential in C-RAN fronthaul networks? - Ultra high CPRI link capacity

Our question in this post is: Why does the CPRI link between BBU (at CO) and RRH (at Cell Site) in C-RAN require a ultra high Gbps bandwidth? Before you read this post, we advise you to read our previous post, "CPRI (1): Emergence of C-RAN and CPRI overview". The CPRI link capacities required between BBU and RRH in the C-RAN architecture are as follows: Table 1. CPRI data rates...

03/12/2014

66,786

Tech-Blog

CPRI (1): Emergence of C-RAN/Fronthaul and CPRI overview

Emergence of C-RAN (Separation of Baseband and Radio, and Baseband Centralization) Today, global LTE operators are competing with one another more fiercely than ever, under the pressure to provide better service quality and higher speed. Conventional Internet traffic has been increasing steadily. What's more, mobile traffic resulting from OTT video services, such as YouTube, Mobile IPT...

03/04/2014

79,692

Tech-Blog

NTT Docomo’s Advanced C-RAN Architecture

02/10/2014

31,372

One-Shot Gallery

SK Telecom: LTE Fronthaul and Backhaul Architecture

Also see this excellent animation produced by SK Telecom (Source: HFR)

02/04/2014

48,937

One-Shot Gallery

LTE in Korea 2013

Table of Content 1. Korea, the Most advanced LTE Market in the World 2. LTE deployment status by operator in Korea (SK Telecom, KT, LG U+) 3. LTE frequency commercialization status in Korea 4. LTE services: Mobile broadband, Mobile IPTV and VoLTE 5. LTE equipements deployed in Korea 6. LTE devices 7. LTE patents 1. Korea, the Most Advanced LT...

12/04/2013

96,450

Reports

4.5G (3) 4G (2) 4G LTE (5) 5G (497) 5G Private 5G (1) 5G-SIG (2) 6G (4) AI (35) AR (4) ARP (3) ARPU (3) AT&T (2) Akamai (3) Alcatel (1) Authentication (5) Autonomous Driving (9) BMW (2) BSS (1) Backbone (2) Backhaul (6) Big Data (3) Billing (1) Blockchain (4) C-RAN (1) C-RAN/Fronthaul (72) CDN (14) CES (2) CORD (2) CPRI (6) Carrier Aggregation (11) Carrier Ethernet (6) Charging (2) China (3) China Mobile (5) Cisco (4) Cloud (6) Cloud Native (1) CoMP (7) Connected Car (16) Core (1) D-RAN (1) DASAN Networks (5) DHCP (10) Data Center (1) Deutsche Telekom (4) ECM (2) EDGE (4) EMM (16) EPS (2) Edge Computing (1) Ericsson (18) FTTH (16) Femto Gateway (3) Frequency (7) Fronthaul (2) GCSE (1) GSLB (1) GiGA LTE (1) GiGA WiFi (1) GiGAtopia (6) Gigabit Internet (82) Google (11) Google Global Cache (3) HDR (1) HDS (1) HFR (2) HLS (9) HSDPA (2) HTTP Adaptive Streaming (12) Handover (7) Harman (1) HeNB-GW (3) Huawei (1) IEEE 802.1 (1) IP Routing (7) IPTV (101) Immersive Service (1) Initial Attach (2) Intel (1) IoST (5) IoT (205) Jio (2) KDDI (6) KT (254) Korea (88) Korea ICT Market (50) Korea ICT Service (33) Korea ICT Vendor (9) LAA (5) LEO Satellite (1) LG U+ (103) LPWA (7) LSC (1) LTE (302) LTE Identification (2) LTE-A (37) LTE-A Pro (1) LTE-B (3) LTE-H (3) LTE-M (5) LTE-R (5) LTE-U (8) LWA (1) LoRa (14) MEC (19) MPLS (5) MPLS-TP (1) MPTCP (7) MSIP (4) MWC (1) MWC 2015 (26) MWC 2016 (4) MWC 2017 (8) MWC 2018 (3) Massive MIMO (1) Media Platform (1) Microsoft (1) Mobility (2) NAT (8) NB-IoT (15) NTT (1) NTT Docomo (1) Netflix (5) Network Architecture (12) Network Protocol (44) Network Slice (1) Network Slicing (6) New Radio (11) Nokia (17) O-RAN (1) OCP (3) OSPF (2) OTT (8) On-Net CDN (3) Openflow (2) Orange (1) PCRF (4) PS-LTE (7) Pay TV (1) Platform (5) Pri8vate 5G (1) Private 5G (95) Private LTE (1) Public Safety (10) QoS (6) Qualcomm (10) RCS (9) Railway (1) Roaming (3) SD-WAN (21) SDF (2) SDN/NFV (143) SIM (1) SK Broadband (12) SK Telecom (349) SK telecom (1) Samsung (185) Security (25) Self-Driving (3) Sk Telecom (1) Small Cell (6) Spectrum Sharing (2) Sprint (1) Switching (6) T-Mobile (1) TAU (2) Transparent Cache (3) UHD (24) URLLC (1) V2X (2) VR (13) Verizon (8) Video Streaming (43) VoLTE (14) VoWiFi (2) Wi-Fi (72) WiGig (1) Wideband LTE (2) YTL (1) YouTube (9) blockchain (1) eICIC (1) eMBMS (9) ePDG (1) iBeacon (1) mmWave (2) security (1) telecoin (1) uCPE (2) vCPE (1) vRAN (1)