EMOBILE: the mobile broadband revolutionist - Huawei

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Winners This moment is a defining one in Optus’ and the Australian telecom history–it’s leading edge, an Australian first and a first for the southern hemisphere! The expanded horizons of UMTS900 Optus had already deployed a 2.1GHz UMTS network. Even in areas with sufficient 2.1GHz frequency resources, Optus still decided to deploy a UMTS 900MHz network to achieve wider coverage at lower cost. Compared to the 2.1GHz frequency band, the 900MHz frequency operates on a lower frequency with a higher penetration capability and a single Huawei base station covers much wider areas. Tests proved that with a Huawei UMTS 900MHz system, 60% fewer base stations would be required for rural areas. With such a vast region to be covered, Huawei’s UMTS 900MHz was clearly the perfect choice for Optus. In the past, Optus had invested AUD2.5 billion in their GSM network. Their top priority had always been to minimize network construction cost while introducing new technologies. By deploying a UMTS network on top of the mature GSM900 network, they would be able to take full advantage of sites and antennas in the existing network. This decision would not only help them introduce 3G services quickly in markets where network coverage already existed, but would also lower construction operational costs when expanding to cover new areas of the country. All of which could be passed on to the end user, building competitiveness and customer loyalty, in the form of lowered access costs and added, cost-effective services. The remote area rewards of Re-farming Despite its many advantages, UMTS 900MHz is not entirely free of challenges. This technology is still in the process of being fully exploited by supporting industries and the variety of terminals is limited. Currently, only one operator, Elisa, in Finland has deployed a commercial UMTS900 network, implemented on November 11, 2007. When the UMTS 900MHz was introduced, the biggest concern for operators was interference between GSM and UMTS networks. A UMTS network capitalizes on the GSM frequency band. Inappropriate planning may not only jeopardize the performance of the UMTS network, it can also degrade the quality of an existing GSM network. After extensive calculations, Optus found that they could only assign a 4.2MHz frequency bandwidth to the UMTS network. The greatest challenge for Optus and Huawei is to make a network with only a 4.2MHz effective frequency bandwidth perform as well as one with a 5MHz frequency. In response, Huawei made creative use of Re-farming, a network transformation process, to reorganize the frequency, cutover, and optimization of the GSM900 network. The planning stages stimulated positive reactions from technical personnel on the combined Optus and Huawei team. “Although testing had been conducted in Europe, nothing is more exciting than witnessing the whole process in your own 23 Win-Win / FEB 2009
ackyard,” one engineer said. Just the idea of implementing transformation over a large-scale trial network within only three months was something that stimulated everyone’s minds. Test results showed that Re-farming could minimize the bandwidth required in construction of the UMTS 900MHz and the carrier spacing between GSM and UMTS networks. Addressing the limited bandwidth constraints, Huawei used wave-trap technology to ensure the performance of the UMTS network with 4.2MHz frequency bandwidth. In April 2007, a maiden call was made between the UMTS 900MHz network and the existing GSM network in the South Pacific. Moments after completing his first UMTS900 exchange over the trial network, Darren Rogers, Optus’ Network Strategy Manager, announced, “This moment is a defining one in Optus’ and the Australian telecommucations history–it’s leading edge, an Australian first and a first for the southern hemisphere!” The rapid deployment of UMTS900 With the biggest challenge of UMTS 900MHz behind them, Optus began to maximize the fast and efficient deployment features of UMTS 900MHz. The small size, light weight, site flexibility, and easy installation of Huawei’s compact distributed base stations allowed for fast side-by-side installation with existing GSM sites. Even if a site was already crowded, Optus quickly discovered that Huawei’s BBU could easily be installed in a standard cabinet with 19-inch width and 2U height and the RRU could be pole based or installed in the same cabinet. in this fashion Optus was able to reuse the site resources of the existing GSM network in the UMTS 900MHz network, including equipment room, air conditioners, power supply, and transmission equipment. Huawei’s Same-band Antenna Sharing Unit (SASU) scheme enabled the sharing of antennas between two systems with the same frequency band. Sharing reduces investment, frees the trouble of network re-planning, accelerates the 3G network construction, reduces man hours and speeds up commercial usage. Thanks to Huawei’s innovative solutions, Optus saved AUD300 million and achieved its interim goal of covering 80% of the population by June 2008. Recently, with the goal of increasing the percentage of broadband users in the total population from 96% to 98%, Optus CEO Paul O’Sullivan announced an AUD315 million investment plan to be exclusively applied the extended deployment of UMTS 900MHz. Optus also announced the intention of establishing a Mobile Innovation Center with Huawei to deepen cooperation and support the company’s overall expansion strategy. Optus and UMTS900 continue to open up Australia’s outback everyday. FEB 2009 / Win-Win 24
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