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3G网络的商用为移动通信产业注入了新的活力,为用户带来更丰富多彩的业务,也给通信市场带来了更多的发展机遇。随着技术及应用的快速发展,人们很快就不再满足于3G网络现有的带宽能力,为了进一步满足用户不断增长的网络带宽需求,3GPP标准化组织已启动了LTE(Long TermEvolution,长期演进项目)的新一代移动通信系统标准化工作。3GPP启动LTE项目,直接原因是应对WiMAX标准等各种市场竞争,深层次的原因则是将移动通信与宽带无线接入(BWA)技术相融合。宽带无线接入早期定位于有线宽带接入的替代,其发展历程经历了从固定局域接入(如IEEE802.11x)向无线城域接入(如IEEE802.16d),再向广域移动接入(如IEEE802.16e)的发展历程,体现出了“宽带接入无线化”的趋势,为以因特网为代表的信息技术产业向移动通信领域渗透带来了新的机遇,同时也对传统移动通信产业形成了竞争和挑战。与此同时,移动通信技术也向更高的数据率发展,3GPP标准和3GPP2标准分别向HSPA和EVDO演进,标志着3GPP和3GPP2在坚持蜂窝移动能力的同时,日益重视低速局域场景下的接入能力。这种“移动通信宽带化”趋势,为蜂窝移动通信产业从传统语音业务扩展到宽带数据业务领域带来了机遇。正是基于通信产业对“移动通信宽带化”的认识和应对“宽带接入移动化”挑战的需求,3GPP开始了“长期演进LTE”的进程。
The commercialization of 3G network has injected new vitality into the mobile communications industry, bringing more diversified services to subscribers and bringing more development opportunities to the communications market. With the rapid development of technologies and applications, people are no longer satisfied with the existing bandwidth capabilities of 3G networks. In order to further meet the ever-increasing demand of users for network bandwidth, 3GPP has launched the Long Term Evolution (LTE) ) A new generation of mobile communication system standardization work. The immediate cause of the initiation of LTE projects by the 3GPP is to cope with various market competitions such as the WiMAX standard. The deeper reason is that the mobile communications are integrated with the broadband wireless access (BWA) technology. Broadband wireless access early positioned in the cable broadband access alternative, the development process has gone from a fixed local access (such as IEEE802.11x) access to wireless metropolitan area (such as IEEE802.16d), and then to the wide area mobile access (Such as IEEE802.16e), which shows the trend of “wireless access to broadband” and brings new opportunities for the infiltration of the information technology industry represented by the Internet into the field of mobile communications, as well as The traditional mobile communication industry has formed the competition and challenge. At the same time, mobile communications technologies have also evolved to higher data rates. 3GPP and 3GPP2 standards have evolved to HSPA and EVDO, respectively. This indicates that 3GPP and 3GPP2, while adhering to cellular mobile capabilities, attach increasing importance to connections in low-speed local area networks Into capacity. This “mobile broadband communications” trend offers opportunities for the cellular mobile communications industry to expand from traditional voice services to broadband data services. It is precisely because of the communications industry’s recognition and response to the challenge of broadband access mobility that 3GPP started the process of LTE Long Term Evolution.