The most popular wireless communication evolution

2022-08-02
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To meet the continuous upgrading of wireless communication evolution testing and measurement technology

at present, the demand of users for "anytime, anywhere communication" continues to grow, which has promoted the rapid increase of worldwide investment in wireless networks and related equipment. In addition, the rapid growth of China's economy and the rapid improvement of Engineering Technology in wireless technology have made many testing and measuring instrument companies pay more attention to investment and development in China, including not only wireless manufacturers with high efficiency, energy saving advantages and high price comparison, but also the innovation power of wireless products

China's third generation (3G) wireless communication standard TD-SCDMA (time division synchronous code division multiple access technology) and China's fourth generation (4G) wireless communication standard Tdlte (TD long term evolution) will be powerful examples for China to become a global wireless technology leader. In the field of digital video communication, CMMB (China multimedia mobile broadcasting), China's mobile TV standard, tmmb (Telecom multimedia mobile broadcasting) and other digital mobile video standards participating in market competition in China will pave the way for the development of digital video mobile TV technology

the focus of test and measurement instrument companies' investment in China is not only to meet the business opportunities of the world wireless equipment market, but also to pay attention to the huge demand for wireless communication equipment and services in the Chinese market, which will support China's development of mobile communications, digital television standards and wireless mobile broadband technology

wireless communication evolves to complex data services

today's world is evolving in the direction of "communication is everywhere, all the time". Digital communication has become a ubiquitous and accessible technology for hundreds of millions of people all over the world. Nearly 2billion people take mobile as the basic way of daily communication. We not only use voice services, but also enjoy the gradual growth of mobile data services and Internet applications. In China, there are more than 500million users. Modern communication technology is pervasive. 3. Metal hardness test: ubiquitous mobility has become the basic demand of consumers. Only time can ultimately determine the success of a particular technology or the failure of material performance. Therefore, it is still too early to say what technologies will be adopted in the 3G market in the future. Only the growing demand of the global market and the fiercely changing market are most likely to determine their fate

today's mobile communication network mainly focuses on providing high-quality voice services. Even in developed regions, only about 10% of users will use other data communication means except SMS. In fact, most operators count SMS as their data services, so the proportion of real data services is probably less than the above estimate. The only way to make more profit from voice service is to improve efficiency, make the call cost more competitive, and be closer to the wired network in function. The introduction of all upgraded technologies is to increase the proportion of data services without damaging the quality of voice calls

data service has always been the profit growth point of mobile communication operators. Nowadays, higher data bandwidth has enabled the rapid development of services such as music downloading, video calling and mobile TV. The screen size and battery life of terminal devices have always been the bottleneck in the development of video services, while mediaflo, DVB-H, DMB and other technologies that act as "auxiliary technologies" can provide users with more video service choices than 3G services in the long run

in terms of network, data bandwidth and related spectrum requirements have always been a major problem hindering the development of mobile TV services. HSPA (high speed packet access) and 1 × EV-DO, which can increase the cell data capacity by at least 5 times. Using these technologies, each cell can accommodate more users, and each user can enjoy higher data rate services, even comparable to the speed we use DSL (digital subscriber loop) at home

operators are still taking back the current 3G with positive and negative change functions; The investment cost of the system, so they need to carefully choose when and how to upgrade. This requires a choice among many wireless access technologies. Some operators also need to consider the WLAN (wireless local area network) hotspot capacity in areas with high data transmission density. Aside from pure technical decisions, operators also need to plan how to seamlessly upgrade users to the new system while supporting both old and new devices, which should consider both operability and expenses

the evolution of mobile communication networks from simple voice calls to supporting complex data services began with IS-95 and GPRS (General Packet Radio Service). However, the transmission rate of the above technologies is too low to make users have a comfortable experience, so the communication standard setting organization began to research the third generation mobile communication technology that can support higher rate. The communication systems developed in Japan (PHS and later PDS) have not been developed outside Japan, and international roaming is an important source of profit for operators. NTTDoCoMo, the country's main operator, cooperates with GSM organizations to ensure that their next-generation systems can support this function by establishing the third generation mobile communication technology partner project organization (3GPP), selecting and standardizing WCDMA (broadband code division multiple access), As a general solution

in order to compete with 3GPP, the new system evolved on the basis of IS-95 has also been transferred to the camp of improving data transmission rate, and 3GPP2 organization has been established. Every organization hopes to surpass its competitors in the highest data transmission rate, which is misleading to users. The "standard" WCDMA system supports a maximum data transfer rate of 350kbps for a single user. At first, however, the focus of the publicity was on the transmission rate of 2Mbps for all users in each cell, so that many users felt that this was the highest rate they could use

with the introduction of home broadband and WiFi (wireless fidelity) technologies into people's lives, mobile network operators hope to find an enhanced standard that can provide a transmission rate comparable to the above technologies. As a result, the accompanying long-term development commitment of 3GPP organization HSPA and 3GPP2 organization 1 × The birth of EV-DO versions B and C

demand upgrading challenges the innovation ability of test and measurement equipment enterprises

in recent years, with the evolution of wireless technology, the global wireless test equipment market has continued to grow to meet the market demand. The most fundamental market driving force for the development of high-performance wireless technology comes from better voice quality, higher mobile computing data rate and higher quality real-time mobile video. The expectation of consumers is that no matter the wireless network service, home cable network, ADSL (asymmetric digital subscriber line) or cable digital TV, they can achieve the same high performance. Consumers of wireless services also expect that any mobile, PDA (personal digital terminal), PC (personal computer) data card or any other wireless device can be connected to the wireless network through a convenient and reliable way. The above requirements drive test equipment manufacturers to continuously improve the design and manufacturing of measuring instruments and schemes, so as to ensure that the supplier's network wireless equipment can develop products and services that meet the above requirements

with the increasing demand of users, the challenge and complexity of engineers' research, design and development of communication products and services are also increasing. Wireless devices will become more complex - devices will need more functions and support multiple cellular technologies to improve data transmission rate while using multiple wireless channels. When it comes to communication equipment, we have everything from low-end to high-end, from simply receiving and making calls to fully functional and accessible high-end PDAs. Not only that, higher performance integrated components and modules and more software content will also emerge in high-end communication equipment

in addition, another key market driving force comes from consumers' demand for the reduction of wireless Internet service charges. With the cost reduction of wireless services and equipment, the voice of reducing the test cost is also growing

for the standard, the shortening of the formulation time means the increase of many interpretations and revisions, which will bring considerable variables to the standard itself, and the different results of early function tests of equipment by different manufacturers will also reflect their different understanding of the standard. This poses a great challenge to the testing tools and measurement technology, and even requires the testing and measurement enterprises to put the testing tools and solutions on the market before the technical standards and test specifications are fully formulated. The increasing market demand will surely lead to more complex designs and more new functions. For example, the hybrid devices of frequency division duplex (FDD) and time division duplex (TDD) require the equipment test platform to have the function of different tests in the same test system. In addition, when using MIMO (multiple input multiple output) technology, the combination of multiple received signals will change the test requirements

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