Hot spot and analysis of broadband wireless access technology

Mobile communications in the world's great success, driving the development of a variety of broadband wireless technology, the world's wireless technology is stepping into the broadband universe. At present, 3G technology has been able to achieve mature business, WiMAX has become a new hotspot, other short-range broadband wireless technology is also emerging.

3G technology is basically mature

Forward to high bandwidth and IP

As a mobile network of broadband technology, 3G will become the next step in the development of wireless operators the main direction. At present, 3G technology has been basically mature, in the global scale construction period, enhanced technology development, the network layer of IP integration process has begun.

1. At present, WCDMA and CDMA2000 related technology has been more mature. TD-SCDMA has also made important progress. 2005, WCDMA continued to develop steadily, commercial network development faster, but the number of users increased relatively slow. As of April 2005, 17 operators opened the cdma20001xev-do business, the number of users reached 12.9 million.

TD-SCDMA in China has made a breakthrough in system, chip and terminal. TD-SCDMA System equipment basic functions have been achieved, stable performance. Many handset manufacturers can provide mobile phones in small quantities at the end of the year. TD-SCDMA Commercial preparation work has been basically completed, initially with an annual output of the base station system million-channel industrial scale. (Computer science)

2. At present, 3G enhanced technology has become a hotspot, 3G itself has evolved to a higher bandwidth capability. The rapid development of 3G enhanced technology E3G has been achieved in recent years. 3GPP in November 2004 workshop,2004 December deployed 3G long-term Evolution (LTE) to promote 3G technology in the transmission rate, business support capabilities, spectrum utilization and other aspects of the development. At present, 3GPP2 has also made a similar plan.

3. In addition to the development of wireless access rate in 3G system, IMS has been widely concerned and promoted in the network level. IMS is defined by 3GPP in its R5 version, which defines the network architecture of the R5 core network to the full IP, and its core feature is the SIP protocol and the independence of the access. IMS is the combination of the Internet business model and the traditional telecom network management model, which has the ability to provide the Internet with abundant and flexible service, and inherits the strict management system and excellent service quality of the traditional telecommunication network. IMS actually embodies a trend of network integration, which embodies the network construction principle of NGN and business separation. The development of IMS will promote the 3G network to the IP grouping forward, and to the fixed wireless integration of the next generation of integrated network direction.

At present, because of the technical charm of IMS, 3GPP2 has accepted this concept, so the future 3G core network will get rid of different access standards and realize the unification of network level.

WiMAX becomes a new hotspot

Bring vibration to the wireless industry

As the most popular topic in the recent wireless communications industry, WiMAX has become a new hot spot, which is favored by many manufacturers.

1. WiMAX to the mobility of evolution. At present, WiMAX is developing mobility support, the IEEE is actively developing 802. 16e. 802. 16D is a fixed wireless access technology, while 802. 16e's goal is a mobile broadband wireless access technology, including: support Speed mobile 120km/h, can provide broadband access to dozens of mbit/s, covering the general within a few kilometers. Currently only the physical layer of wireless interface and MAC layer standardization, expected to be completed next year, the core network part of the standardization is not clear.

2. WiMAX will not end 3G. 802. The target of 16 is overlapping with 3G, 3G enhancement and b3g, and is changing dynamically. From the Comprehensive analysis of standardization degree, product maturity, market application and frequency spectrum, the dominant position of 3G and b3g and other cellular mobile communication is difficult to shake, but the demand of broadband wireless access is also increasing. Overall, the 802 series standards will be complementary to mobile communications and common development, which is mainly reflected in the following aspects.

From the application characteristics, 3G and its enhanced technology has ubiquitous (continuous coverage), mobility and other characteristics, and good at providing full service (voice and data), high data rate. WiMAX is characterized by hot cover, nomadic mobile or limited mobile, data service as the main, high data rate. B3G is based on cellular mobile communications technology, a variety of wireless technology integration applications, with full service, high data rate, continuous coverage and other characteristics. WiMAX possible applications include: Access to mobile communications network, fixed network wireless broadband access. Overall, 3G, WiMAX and B3G are the technologies that meet different rates and different requirements at different times, and are complementary and coexisting.

Rapid development of short distance wireless technology

Apply to a wide range of areas

At present, a variety of short-range wireless technology is also rapidly developing, its application in addition to the traditional sense of communication, but also to the home network, industry, transportation, commercial and other areas of extensive penetration. UWB, as a kind of ultra-high speed short-range wireless access technology, has been supported by the Giants such as Intel. RFID-related products and solutions are also emerging.

Ultra-wideband UWB is a kind of non-carrier communication technology, which transmits data by using nanosecond to Pico-second sine wave narrow pulse. By transmitting extremely low-power signals over a wide spectrum, UWB can achieve a data transfer rate of hundreds of to several gigabytes per second in a range of about 10 meters. UWB has strong anti-interference performance, high transmission rate, wide bandwidth, low energy consumption, good confidentiality, very small transmission power, and many other advantages, mainly include indoor communications, high-speed wireless LAN, home network, cordless phone, security detection, location measurement, radar and so on. At present, Intel Corporation is conducting research and development to integrate UWB into the PC chip group. NEC, Toshiba and other enterprises have also been involved in the field of UWB applications.

In addition to UWB, some short-range wireless access technology is also entering people's work and life, RFID in the logistics, commercial areas of rapid promotion, Bluetooth technology has been in the electronic consumption, catering and entertainment fields play a role, ZigBee and other technologies will be in the home electrical control, industrial applications and other fields to be applied.

Broadband becomes the main driver of wireless industry

Multi-technology is gradually converging development

Wireless technology, new programs and new applications are presented to the world to reveal the future of wireless communications industry. We may wish to make some predictions about the development pattern of the wireless industry in the near future.

First of all, for some time and even in the next 15 years, 3G network construction and development into the global mobile communications and even the whole wireless field of the main development trend. Due to the current 3G mainstream technology has a mature commercial capacity, while 3G enhanced technology will also have the ability to build the network, with the 3G equipment cost reduction, the adoption of a stronger business support capacity of 3G to build mobile networks, its cost-effective is gradually exceeding the 2G technology. At present, 3G network construction has been launched on a global scale, although the development in many countries is still relatively slow, but this process is unstoppable. And whether beyond the 3G directly into the wide band of 4G problem, more and more voices that this is unrealistic, is a departure from the market development laws.

Secondly, the rapid development of wireless communication will make the narrow-band fixed network market gradually shrinking, broadband services will gradually become the main business of fixed networks, access to some of the wireless way will dominate the future. With the rapid development of wireless communication technology and the intensification of market competition, the service price of wireless access part will be decreasing. Due to the high personalization and liberalization advantages of wireless access, the narrow band Voice Access service of fixed telephone in this context will gradually be replaced by wireless mode. In the future, fixed network will be mainly to the broadband market forward, while the fixed network as a variety of wired and wireless access to the backbone of the transmission network.

Finally, the integration and integration process will be a major trend for future development in the wireless sector as a whole. With the further popularization of IP technology, the promotion of fixed network grouping process, the increasing demand of fixed network and wireless network, the fixed and mobile fusion based on the concept of Next generation network will advance gradually with the commercial and further upgrade of 3G network. In the R5 standard version of 3GPP, the grouping of core network is proposed. The introduction and popularization of IMS technology will make each standard 3G network unified on a network platform, and realize the integration with fixed network in NGN architecture. And 3g/b3g and WLAN, WiMAX, UWB and other technologies of mutual infiltration and evolution, will be in a complementary direction, these technologies will be based on the framework of NGN platform, to achieve access to the layer of diversification and integration, to achieve different environments and different needs of the user's optimization business support.

In short, the wireless sector in the next period of development performance as the core of the two points: one is based on IP broadband, become today and tomorrow wireless Communication innovation and development of the main driving force; the second is the integration of multiple access technology to become an important trend, and further promote the healthy and prosperous development of wireless field.