The prospect and development strategy of the hotte

2022-08-08
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The prospect of wireless broadband and its development strategy

Abstract: in order to meet the communication and networking needs anytime, anywhere, the wireless broadband network has become an important aspect of broadband development. With the momentum of wireless local area network (WLAN), wireless metropolitan area (man) technology has recently emerged. In order to further promote the application of wireless technology in the broadband field, this paper puts forward and compares several access schemes in the development of broadband wireless access, and puts forward the existing problems, measures to be taken and development strategies

key words: broadband access; WiMax; Wi-Fi; 3g

I. Introduction

at present, both operators and commercial users have high enthusiasm for wireless broadband, both at home and abroad. The rapid development of wireless local area network, which complements 3G technology in terms of access rate and adaptation environment, is regarded as an extension of the traditional wired network. In some environments, it can also replace the traditional wired network and become a new generation of high-speed wireless access network

wireless broadband still has a long way to go before it can truly develop into a mature industry, and the realization of wireless network is the trend of scientific and technological development. Users' enthusiasm for wireless broadband has been ignited. In fact, the wireless era is not far away

broadband wireless access is an emerging market, which will give further play to the ubiquitous advantage of broadband interconnection. At present, 3G is evolving from 3.5G to super 3G and will compete with WiMAX based on IEEE802 standard in this market. Due to the convergence of super 3G technology and WiMAX, the possibility of further integration of the two is not ruled out. The best way for China's fixed line operators to evolve into full-service operators is to Reorganize Enterprises through acquisition, merger and other methods, and reasonably allocate resources, so that fixed line operators can have cellular mobile communication services and become full-service operators. All service operators can use WiMAX to develop broadband wireless access while cellular mobile communication evolves to 3G

II. WiMAX, the relationship between WiFi and 3G

wifi. Both WiMAX and 3G belong to broadband wireless technologies, and the relationship between WiFi and 3G has become increasingly clear. However, with the emergence of WiMAX, which supports handoff and provides high-speed bandwidth, its relationship with 3G and WiFi has once again become the focus of debate

max WiFi relationship

the relationship between WiMAX and WiFi does not belong to the same category. WiFi is an interoperability organization related to the wireless local area standard ieee802.11x, while WiMAX is an interoperability organization related to the wireless metropolitan area standard IEEE 802.16x. Both of them face different application types

compared with WiFi, WiMAX has better physical layer and MAC layer technology, higher speed and better QoS, but there is no substitution relationship between the two. WiFi is mainly used as wireless local area, while WiMAX is mainly used as wireless metropolitan area. There is a complementary relationship between the two. It can be considered that WiFi is more suitable for indoor use in cities, while WiMAX is more suitable for outdoor use in cities

the relationship between WiFi and 3G

for the relationship between WiFi and 3G, from the comprehensive analysis of coverage area, rate capability, basic service category, mobile rate, forward expansion evolution and other aspects, it can be seen that 3G and WiFi are an excellent complementary combination rather than a positive competitive relationship. Different standards and standardization organizations have their own different styles and strengths. The best relationship between WiFi and 3G is to complement each other and develop together

max's relationship with 3G

objectively speaking, WiMAX's original intention and market goal is broadband wireless access metropolitan area (bwa-man) technology, commonly known as IEEE wireless man. Its basic goal is to provide a broadband wireless access means that can effectively interoperate in a multi-point multi vendor environment in the metropolitan area. Therefore, WiMAX's positioning is the category of broadband wireless metropolitan area. Although the transmission rate of WiMAX is much higher than that of 3G, and its coverage distance is equal to or even farther than that of 3G when using low-order modulation, the positioning of WiMAX is different from that of 3G. The positioning of 3G standard is a personal terminal that takes wireless wide area Wan as the basic mode, public voice and multimedia data as the content, and roams around the world

in essence, WiMAX is an important means to support the interconnection of wireless metropolitan areas and multi-point base stations. The potential market size of the two is also very different. Therefore, WiMAX will not become a substitute for 3G, and 802.20x after 802.16x WiMAX has more similarities with 3G standards

in addition, from the perspective of technology itself, WiMAX does not have mobile features such as wide area roaming, security and terminal portability of 3G public mobile communication network. WiMAX is more than two years away from commercial use, and it will be about five years before its scale is popularized. In addition, WiMAX does not have the ability to efficiently support real-time voice services, which will limit its use as a public mobile communication application. Therefore, WiMAX may be used as a supplementary means of 3G network to give full play to its characteristics in the field of high-speed information access

ma and 3G relationship

mobile broadband wireless access (wbma) using 802.20x standard can provide coverage and mobile speed similar to 3G, and has WiFi data transmission rate. Flarion technology company took the lead in developing wbma system based on flash OFDM technology. The new is only about half of the wimax9802.16x, but the mobile performance of the wbma standard is better than that of WiMAX, which is equivalent to that of 3G

as mentioned above, WiMAX belongs to wireless metropolitan area (WMAN) and 3G belongs to wireless wide area (WWAN). Their positioning is different. In the future, the real competitor of 3G should be IEEE 802.20x for WWAN rather than IEEE 802.16 for WMAN. Therefore, there is no direct competition between WiMAX and 3G. For the relationship between wbma (802.20x) and 3G, although the 802.20x standard is not perfect, its features are increasingly integrated with the characteristics of 3G. It can be predicted that 802.20x standard will combine the wide area coverage of 3G, high-speed handover and the high bandwidth characteristics of WiMAX. At present, many countries have started 3G commercial, while wbma only stays at the stage where the standard needs to be improved. Therefore, the real positioning of wbma should focus on Beyond 3G or 4G

III. Development of operators

1 Evolution from fixed line operators to full-service operators

in recent years, with the development of mobile communication, the cost has been continuously reduced, and a large number of users have been diverted from fixed line operators, posing a threat to the survival of fixed line operators. The evolution from fixed line operators to full-service operators has become a global development trend. At present, the number of mobile communication users in China has reached 350million. Whether Chinatelecom or Chinatelecom, its investment of hundreds of billions of yuan to build 3G networks covering the whole country and provide voice based services will be a disaster, which is bound to fall into a debt crisis. The reasonable evolution method should be to reorganize the enterprise through acquisition, merger and other methods, reasonably allocate resources, so that the fixed operator has the cellular mobile communication business, and become a full-service operation two fixture separation and tensile tester at a certain speed

2. Strategies for different operators to develop 3G

mobile operators and full-service operators can adopt the strategy of gradual development. Because they already have broadband fixed line and 2g/2.5g cellular mobile, local 3G networks should be deployed in mature areas, using 2g/3g dual-mode, without considering national coverage. In this way, the risk can be reduced and the return on investment can be improved

fixed line operators without cellular mobile communication should not adopt the strategy of deploying 3G covering the whole country at one time to compete head-on with existing mobile operators. This is similar to the strategy of Hehuang company to develop 3G in Europe, that is, to seize the voice based market at a low price is not desirable in China. Relying on loans for huge investment and vicious competition will drag the company down

3. Strategies for different operators to develop broadband wireless access

mobile operators have formulated the evolution strategy of broadband wireless access from 3.5G to super 3G. In fact, the basic concept and network architecture of super 3G are similar to WiMAX. The reason why super 3G is proposed is that mobile operators should take the lead in development

the reasonable choice for all service operators to develop broadband wireless access is to use WiMAX to develop broadband wireless access on the basis of existing broadband infrastructure. In cellular mobile communication. There is no need to develop 3.5G and super 3G, and WiMAX can be used to replace them, so the cost is much lower. In addition, it is possible to integrate supplier 3G and WiMAX

if the industrial restructuring cannot be realized, the best way for fixed operators to evolve into full-service operators is to use WiMAX to develop broadband wireless access and provide nomadic and mobile data communication services. On this basis, mobile voice services are provided through interconnection. This process can be completed within 3 years. During this period, PHS shall be fully utilized to relieve the pressure of mobile shunting. During the development process, there may be the following noteworthy problems:

(1) frequency

the development of broadband wireless access depends on the allocated frequency. To provide large-area coverage with cells with a radius of more than 1km, the operating frequency must be lower than 2.5GHz. These frequency bands have been allocated to 2g/3g mobile communication and terrestrial television broadcasting. For super 3G, 3G frequency can be used, which is no problem. For WiMAX, the frequency problem has become an important problem restricting its development. At present, the frequencies available for WiMAX are 3.5GHz broadband wireless fixed access band and 5GHz public band. Due to poor penetration, such frequencies can only provide line of sight communication, and can not meet the requirements of nomadic access at any place. At present, the possibility of using the 2.5 ~ 2.59ghz frequency band is being discussed internationally. South Korea has allocated the 2.3ghz frequency band to WiMAX. Another possibility is to use the terrestrial TV band below 900MHz. This frequency band has strong penetration and small attenuation, and is especially suitable for large-area coverage in remote rural areas. Since broadband services are mainly video services, it is possible to regard WiMAX as an "over the air cable modem" to provide broadband interactive media services and use TV frequency bands. The United States has allocated a 700MHz frequency band to WiMAX

in addition, it is possible for WiMAX to use 3G frequency band: since super 3G and WiMAX converge, WiMAX should also be able to use 3G frequency band. If the 3G license is issued to a full-service operator, the operator can use the 3G frequency band and provide broadband radio access services with WiMAX

(2) providing universal services to bridge the digital divide

at present, China's telecom universal service "village to village" project covers only 95%, and the proportion that can be reached is even lower. To solve the problem of 100% coverage and provide broadband access, it is impossible to simply use wired communication? Its cellular radius can reach tens of kilometers and its cost can be greatly reduced. It will play an important role in bridging the digital divide and providing universal services

broadband wireless access is an emerging market, which will give further play to the ubiquitous advantage of broadband interconnection. At present, 3G is evolving from 3.5G to super 3G and will compete with WiMAX based on IEEE802 standard in this market. The convergence of super 3G technology and WiMAX does not rule out the possibility of further integration. The best way for China's fixed line operators to evolve into full-service operators is to Reorganize Enterprises through acquisition and merger, reasonably allocate resources, and enable fixed line operators to have cellular mobile communication services and become full-service operators. All service operators can use WiMAX to develop broadband wireless access while cellular mobile communication evolves to 3G

(3) there are potential safety hazards

this is also a common weakness of all wireless transmission technologies. Wi Fi uses radio frequency (RF) technology to send and receive data through space. Because radio waves are very vulnerable to

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