Distributed Node B is a telecommunications base station technology sold by Huawei that enables telecommunications operators to deploy 3G networks. The system consists of a baseband unit (BBU) and a radio remote unit (RRU), which are installed separately and process baseband signals and radio frequency signals respectively. To form the architecture of Distributed Node B, a BBU connects to one or more RRUs with Common Public Radio Interface.[1] Distributed Node B is part of Huawei’s overall Universal Mobile Telecommunications System (UMTS) offering, intended for the deployment of faster, lower cost 3G networks.[2][3]
Development edit
Huawei began developing Distributed Node B products in 2002 and released its first RRU in 2003.[4] The company announced the global launch of its customized UMTS Distributed Node B Solution at the 3GSM World Congress 2005 in Cannes, France.[5]
According to Huawei, Distributed Node B was developed in response to customer demand for a technology which could be installed faster, with lower operational costs.[2] The company states that its compact BBUs can be placed in existing spaces, rather than requiring an equipment room, and the technology is small, light weight, and allows direct installation near the antenna, which can be completed by a single person.[4] In addition, Huawei states that its Distributed Node B technology reduces energy consumption by approximately one-third compared with a conventional base transceiver station, and is designed to handle burst traffic.[5][6]
Huawei’s first W-CDMA Node B Outdoor RRU was connected in March 2006. Key features included a standard CPRI interface, transmit diversity mode and multiple receive diversity modes, large transmission power and high receiver sensitivity.[1]
Applications edit
Huawei’s Distributed Node B solution may be used in fully outdoor, partially outdoor, and indoor site-sharing applications, using different configurations and locations of BBUs, RRUs and related equipment. In addition, BBUs and RRUs are connected to each other through optical fiber, which can be extended as far as 40 kilometers, designed to be used for mobile network constructions in large cities.[4]
Customers edit
In 2006, Huawei announced contracts to deploy Distributed Node B in Tajikistan, with mobile operator VimpelCom,[7] in Spain with Vodafone,[8] and in the United Arab Emirates with Etisalat.[9] The following year, Huawei deployed Distributed Node B base stations in Singapore as part of a 3G network infrastructure upgrade for StarHub[10][11][12] and announced it would deploy the technology in Japan with EMOBILE,[13] and in Sri Lanka for Bharti Airtel Lanka.[14][3] In 2011, Huawei launched an LTE TDD network using Distributed Node B technology in Saudi Arabia with Saudi Telecom Company.[15][16]
References edit
- ^ a b "Huawei's WCDMA NodeB Outdoor Radio Remote Unit RRU3801 CV100R005 Is Now Available" (Press release). Huawei. 8 March 2006. Retrieved 3 November 2011.
- ^ a b "Huawei UMTS End-to-End Solution" (PDF). totaltele.com. Huawei. Retrieved 3 November 2011.
- ^ a b "Bharti Airtel signs US$150 million managed network deal with Huawei". China Telecom Newsletter. September 2007. Retrieved 14 November 2011.
- ^ a b c "Innovative Distributed NodeB Solution". market.huawei.com. Huawei. Retrieved 3 November 2011.
- ^ a b "Huawei Launches Customized Innovative UMTS Distributed NodeB Solution" (Press release). Huawei. 15 February 2005. Retrieved 3 November 2011.
- ^ "Environmental protection". huawei.com. Huawei. Retrieved 3 November 2011.
- ^ "Huawei Wins Tajik GSM Contract". cellular-news.com. Cellular-News. 30 May 2006. Retrieved 11 November 2011.
- ^ "Vodafone Spain benefits much from HSPA Distributed Node Bs" (PDF). 3G Live. Huawei. February 2007. Retrieved 3 November 2011.
- ^ "Huawei picked to build Etisalat UMTS network across the UAE". arabianbusiness.com. Arabian Business. 17 November 2006. Retrieved 3 November 2011.
- ^ "Huawei deploys first HSUPA network in Singapore". hsupa.com. February 2007. Retrieved 3 November 2011.
- ^ "Huawei Deploys HSUPA Commercial Network for StarHub in Singapore". techon.nikkeibp.co.jp/. Nikkei Business Publications. 29 August 2007. Retrieved 11 November 2011.
- ^ "Starhub selects Huawei for providing UMTS/HSPA solutions". Asia Pacific Telecom Newsletter. March 2007. Retrieved 14 November 2011.
- ^ "Huawei Signs HSDPA Network Contract With eMobile". chinatechnews.com. 27 September 2007. Retrieved 11 November 2011.
- ^ "Bharti Airtel Signs $150 mn deal with Huawei". voicendata.ciol.com. Cyber Media. 19 September 2007. Retrieved 3 November 2011.
- ^ "STC Awards Huawei UMTS Commercial Contract" (Press release). Huawei. 6 June 2006. Retrieved 3 November 2011.
- ^ Sha, Nye (15 September 2011). "Huawei Powered STC to Launch LTE TDD Commercial Network". cn-c114.net. C114. Retrieved 11 November 2011.
Category:Telecommunications Category:Telecommunications equipment