LTE-A: State of the Market
|出版日||ページ情報||英文 18 Pages
LTEは3GPPが策定した通信規格のセットです。ほとんどの商用サービスはRelease 8/9に沿った装置・デバイスを活用しています。その後継規格であるRelease 10については、世界各国の通信オペレーターは「LTE-A」という名称をつけています。ただし、全てのデバイスがRelease 10で規定してある機能を全部搭載する訳ではないので、LTE-Aが使えるネットワーク／サービスについては若干の混乱が見られます。むしろ、LTE-Aは既存のLTEに各々のニーズに沿った機能を追加・強化したものと考えたほうがいいでしょう。オペレーター側では、これらの機能を「最少の費用で最大の改善効果が得られる機会」と捉えています。必要なデバイスやチップセットの供給が始まれば、オペレーター各社は通信速度を上げつつ、様々な機能を提供できるようになります。
Long Term Evolution (LTE) is a set of standards defined by the 3GPP. Most commercial LTE networks use equipment and devices built around Releases 8/9 of the standards. As of April 2014, the latest agreed release is Release 11 ("functionally frozen" in December 2012), with Release 12 scheduled for freezing in September 2014. Many network equipment providers' LTE hardware and software can already offer features complying with the relevant parts of the standards for Release 10 and above, though they do not necessarily support every feature defined by those standards.
Pretty much all vendors, analysts and operators agree that Release 10 could be called LTE-Advanced, or LTE-A. Some would say that subsequent releases of the 3GPP standards would also be LTE-A. However, some are using other terms, such as LTE-B, for features that will be implemented in Releases 11 and 12.
There is some confusion about how the term LTE-A applies to specific networks or services. This is because not all features defined by Releases 10 and above will be deployed by all operators: they will not all be needed in all cases. It's better to think of LTE-A as a toolkit of enhancements for LTE from which operators can pick and choose to suit their specific needs. (Though commercial services are being branded in several ways, such as "4G+.")
In this report, we define LTE-A as "a broad and developing set of features of LTE networks, codified in 3GPP Release 10 and subsequent releases, to enhance the speed and performance of LTE networks."
The set of features that will be deployed in LTE-A networks is starting to become clearer: they will be those features that, for any specific operator, enable efficient use of spectrum assets for maximum capacity and coverage, and those that improve the user experience of mobile data wherever they are in the network (including at the cell edge).
Operators are looking for those features that give them the biggest improvement at lowest cost and easiest deployment. From the smorgasbord of technologies considered and standardized by 3GPP in Releases 10 and above of LTE, various forms of carrier aggregation, including multi-mode, more than two carriers, dual connectivity and possibly use of unlicensed spectrum, will be the most significant over the next year or two. Devices using chipsets supporting Cat 6 data rates will increasingly be available to help operators make the most of the increased speeds they can offer to subscribers.
‘LTE-A: State of the Market’looks at the state of the market for LTE-A networks and services. It reviews those features of the 3GPP specifications for Release 10 and beyond, and examines why some of them are being deployed and trialed by operators around the world while others are likely to remain unrealized for some time. It also looks at the availability of chipsets and devices supporting LTE-A features. Finally, it gives the perspectives on LTE-A market development of eight leading vendors of LTE-A network infrastructure.
Sample research data from the report is shown in the excerpts below:
Selected LTE-A Key Features & Possible Deployment Timetable
Source: Heavy Reading 4G/LTE Insider.
Every operator deploying LTE-A features is likely to pick and choose those features to suit its specific circumstances. The decision drivers will relate to competitive pressures, spectrum holdings (and strategy), current capacity of the RAN, backhaul and core networks, service mix and customer base and incumbent equipment vendors' solution roadmaps. The most significant features that operators will be looking to deploy to achieve capacity and network densification aims, and the likely timetable for their implementation, are shown in the following excerpt.
Companies profiled in this report include: Airspan Networks Inc. (Nasdaq: AIRO); Alcatel-Lucent (NYSE: ALU); Ericsson AB (Nasdaq: ERIC); Huawei Technologies Co. Ltd.; NEC Corp. (Nasdaq: NIPNF); Nokia Networks, a division of Nokia Corp. (NYSE: NOK); Radisys Corp. (Nasdaq: RSYS); and ZTE Corp. (Nasdaq: ZTCOF).