The RRU+BBU base station scheme has become the mainstream and strives for smooth evolution to HSPA


The development of 3G market has entered another peak, and HSDPA has ushered in a construction climax in the international scope. In China, the construction of ten TD-SCDMA cities is also in full swing. The growth of the market for equipment enterprises to provide a broad space for competition and development, in recent years, 3G network equipment upgrade speed, base station products are also new, in the economy, flexibility, efficiency and other aspects of progress. In this "3G Analysis Report", we invited WCDMA mainstream enterprises, TD-SCDMA mainstream enterprises to talk about market development and equipment evolution.

Shi Yong, Product Promotion Director of Alcatel Wireless, Shanghai Bell

HakanCedlof, Senior Market Product Manager, Ericsson Wireless Product Solutions

Nokia Siemens Networks Greater China sales director Qian Jinhua

The WCDMA market is booming

Shi Yong: To date, Alcatel Shanghai Bell has deployed more than 45 WCDMA/HSPA networks worldwide. On average, 1 out of every 4 operators in the world choose Alcatel Shanghai Bell for their solutions, and 12 of the top 15 operators in the world have maintained close cooperation with us.

After the merger of Alcatel Shanghai Bell, WCDMA technology is more advanced and innovative. At present, it occupies the first position in the world in terms of 3G wireless power. In the first half of 2006, Shanghai Bell Arcatel deployed HSDPA networks in 11 countries around the world. In 2007, the company won a number of WCDMA contracts such as France SFR, Japan SBB, Nigeria Globacom, and New Zealand TNZ, and the growth rate was significantly ahead of other manufacturers.

On the road of HSPA technology development, Alcatel Shanghai Bell has won the first place in terms of commercial cases, and HSPA ranks first in the industry in terms of the number of commercial networks and network scale, which can provide high-speed data services for operators and improve cell capacity.

At the beginning of 2006, Alcatel Shanghai Bell launched the innovative FemtoBSR solution, bringing a flat wireless architecture that optimizes operators CAPEX and OPEX. At the same time, Alcatel Shanghai Bell is actively committed to 3GPP/LTE research, with a forward-looking design that can smoothly evolve HSPA+ and LTE technology.

HakanCedlof: In 2006 and 2007, the WCDMA/HSPA market was a high growth year, with Ericsson supplying equipment for half of the world's commercial HSPA networks, including the world's first commercial HSUPA network deployed for Hutchison Whampoa 3 in Italy. Ericsson also delivered more than 100 commercial WCDMA networks, further strengthening Ericsson's global WCDMA/HSPA leadership.

Mr. Qian: Nokia Siemens Networks is a global leader in both markets. We have 99 open contracts for WCDMA wireless networks, supporting approximately 70 operators to launch HSDPA network services. With the WCDMA/HSPA network equipment provided by Nokia Siemens Networks, the number of connected users worldwide has reached 100 million. At the same time, with the innovation, excellent quality and reliability inherited from our two parent companies, Nokia and Siemens, and our broad product portfolio, we not only provide telecommunications infrastructure, but also industry-leading solutions and true end-to-end connectivity to our customers. As a global leader in mobile devices, Nokia will also support a wide range of wireless technologies. Nokia Siemens Networks is the absolute leading 3G/WCDMA provider in Greater China, providing 3G/WCDMA solutions to the five major operators in Hong Kong and Taiwan, and is the only international vendor with 9 years of TD-SCDMA investment.

Actively upgrade and optimize HSDPA

Shi Yong: Alcatel Shanghai Bell was the first to realize the demonstration of HSDPA and HSUPA, launched the world's first HSDPA commercial software, and took the lead in demonstrating HSDPA3.6Mbps and 7.2Mbps rates in the world. In the evolution of WCDMA to HSDPA, Alcatel Shanghai Bell can achieve a smooth transition through base station software upgrades alone.

After the upgrade, the network optimization work mainly includes: providing KPIs that meet the needs of users, continuously improving the quality of the network, and constantly verifying the KPI indicators in the network and the live network, and striving to achieve "performance and commitment" in the feedback of users on HSDPA.

HakanCedlof: In the upgrade market from WCDMA to HSPA, Ericsson mainly implemented it through software (including HSDPA and HSUPA), thus ensuring a smooth evolution of the network. After the network upgrade, Ericsson has designed the system with many powerful features to optimize HSPA performance, such as fast dynamic output power allocation, fast congestion control, CQI(channel quality indicator) adjustment, etc., using these features, Ericsson can respond to HSPA user growth and traffic changes in the network. The HSPA network is optimized by means of parameter adjustment, which effectively improves the network efficiency and cost efficiency. In the implementation of many commercial HSPA networks, Ericsson commercial HSPA real quality live network performance has been fully demonstrated.

Qian Jinhua: The WCDMA infrastructure is highly flexible and can be upgraded in the future. We have pre-considered new features in the wireless access network architecture and system design. Users can use HSDPA in wireless access networks with a simple software download operation, and HSDPA is backward compatible with 3GPPRelease '99WCDMA. This means that for practical applications in our system, WCDMA and HSDPA users can be served through the same base station and cell synchronization, without the need for additional receivers. All WCDMA base stations currently supplied by Nokia Siemens Networks can be upgraded to HSDPA with a software update alone.

Implement HSDPA directly

Shi Yong: In the WCDMA3GPP specification, the highest rate of digital service in the R99 version is 384Kbps, and the HSDPA technology is introduced in the subsequent R5 version, which greatly improves the rate of digital service and the throughput of the entire cell, and the maximum throughput of the cell reaches 14.4Mbps. They can be implemented in different software versions based on the same WCDMA hardware system.

Alcatel Shanghai Bell's 3G wireless product hardware platform can be smoothly evolved to support HSPA, HSPA+ and LTE technologies. For users using Alcatel Shanghai Bell products, the software upgrade can be achieved from 384K to HSDPA and HSPA+ in the future.

HakanCedlof: Among the networks provided by Ericsson, there are many 384K networks that directly implement HSDPA over WCDMA, including the world's first HSDPA commercial network deployed by Ericsson for AT&T in the United States, and the HSDPA commercial network built for Telstra, which currently has the widest coverage in the world. Upgrading from WCDMA to HSDPA, or directly on HSDPA, mainly depends on when the operator originally built the 3G network. After the HSPA commercial equipment is mature, operators who begin to build 3G networks usually choose to directly mount HSPA, which has the advantage of providing HSPA services to users faster. Ericsson offers flexible and powerful solutions for both approaches.

RRU+BBU base station scheme becomes mainstream

Shi Yong: The base station solution of RRU+BBU, that is, the radio frequency remote solution, is an indispensable part of 3G wireless coverage, which greatly enricues the wireless network deployment scheme of operators. In areas where base station resources are scarce, it can meet the network coverage and capacity requirements of operators.

Alcatel Shanghai Bell's WCDMA product line is very complete, and the WCDMA RF remote solution is the most deployed network in the industry. Alcatel Shanghai Bell realizes the same baseband function as Acer base station, and has the characteristics of low power consumption, easy to upgrade, and flexible application schemes. RRH supports a variety of transmit power 20W/40W/60W(antenna connection), and meets a variety of operating frequency band requirements (2.1GHz/850MHz/900MHz), providing operators with more flexible network deployment options. At the same time, the construction scheme of distributed base stations can save investment costs and support the smooth upgrade of network evolution.

HakanCedlof: In 2005, Ericsson became the first manufacturer in the industry to implement the GSM RF remote concept. This has become a preferred solution for many operators, enabling them to quickly deploy networks in cities with scarce site resources. At the same time, the power consumption of the entire base station is greatly reduced, which is an environmentally friendly solution.

However, for existing GSM operators who already have indoor stations, sharing the site by using a standard Acer station is their preferred option. In addition, flexible expansion can be performed according to the actual needs of the network, as well as easier and more convenient maintenance and expansion of site equipment are also important considerations in the selection of base stations.

Base station product line needs to be rich

Shi Yong: Shanghai Bell Alcatel's WCDMA product series is very complete: the base station variety is rich, the base station controller is highly scalable and reliable, and the W-NMS network management system is powerful and easy to operate.

Base stations from the macro base station to the compact base station, from the digital base station to the radio frequency remote equipment, and the support of the picocell and FemtoBSR, so that the base station solutions form a strong lineup, can meet the needs of different scenarios such as user coverage/capacity.

Alcatel Shanghai Bell is actively engaged in 3GPP/LTE/HSPA+ research and has contributed greatly to these technologies, having been at the forefront of the current technology development at an early stage.

HakanCedlof: Ericsson will continue to develop and improve our existing extensive RBS product family to further reduce the total cost of ownership for our customers, both in terms of network and site. This means that we will look for ways to increase output power, further improve our already excellent wireless performance, add some smart coverage features, reduce capex and OPex per site, reduce the overall number of sites, and achieve total cost of ownership reduction from the base station itself and the overall site solution.

As packet data-centric applications become more prevalent, cost-effective IP transmission has become an important requirement for all RBS products. Our current RBS design takes into account the need for higher data rates in the future, and our current 3G base stations are well compatible with future technologies, ensuring a smooth evolution to LTE.

Qian Jinhua: Nokia Siemens Networks launched FlexiGSM base stations in response to the practical needs of Chinese mobile operators, hoping to help operators build high-quality GSM networks at the lowest cost. It is expected to be launched in the Chinese market from the second half of 2007.

The overall development trend of base stations is lower cost, more flexible architecture, higher performance and integration; The product form of base station will develop in the direction of satisfying various complex wireless environments. Baseband technology is developing towards higher performance and higher integration. Rf technology will develop in the direction of higher efficiency and greater flexibility. In addition, some featured solutions such as segmented indoor coverage solutions and distributed solutions have also become the focus of the industry.

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