"Introduction to" 4G the advent of mobile Internet has entered a new era, but the 4G is not as mature as we expected. China currently has commercial 4G technology, 4G walk do not allow voice service channel for the time being. In order to solve this problem, 4G now uses two solutions to this problem, namely the dual standby programme and CSFB, the future, VoLTE is LTE and 4G matches the Internet voice technology.
4G times of comes let mobile Internet of speed into has a new of times, for many young user for, mobile Internet has fast into has phone most important of function, but for many people for, may mobile Internet surf for is not most important of that items function, they still need stable of calls function, so 4G phone now in voice calls function aspects and do of how does, 4G currently and no we imagine of so mature.
For the time being, whether it is TD-LTE or FDD-LTE, above 90% is the same technique used in the field, are a branch of the LTE technology. But China's commercial 4G technology, 4G walk do not allow voice service channel for the time being, so in order to deal with this situation, 4G now uses two solutions to this problem, namely the dual standby programme and CSFB (circuit to fall). Michael Kors Note 4 Cases Michael Kors case for Note 4
Dual standby programme
Double standby programme actually is good understanding, is 4G network and 2/3G network while standby, voice business of when enabled 2/3G network channel, and Internet of when using 4G network, but double standby programme will displayed two a signal, but and not dual SIM double stay, may will on user caused must of confused, and two a network while standby also will has increased power, reduced phone range of problem.
CSFB technology
CSFB (circuit down) is another solution, is used in the Internet 4G network for high-speed Internet surfing, and then call on the phone back to the 2/3G network, then go back to the 4GLTE network. Benefits do not appear like dual standby dual signal and increase the power, the disadvantage is that down there is a delay, and if the user data when voice calls, data service will fall back to the 2/3G channel.
VoLTE technology
Third is the focus of today, Monogram distribution technologies--VoLTE technologies in the future. VoLTE IP solution is based on the IMS network are LTE voice target programme, final selection of the LTE operators, LTE IMS with the implementation of end-to-end packet-based voice and video communications services and supplementary services with circuit performance. SRVCC (SingleRADIoVoiceCallContinuity) is a VoLTE a supplementary technology of the times, it solves the Terminal from LTE network to LTE network coverage-free (3G/2G cover) place, single radio frequency terminals controlled by the IMS VoIP voice and seamless switching between CS voice.
Simply put, VoLTE is LTE and 4G matches the Internet voice technology.
With the growing maturity of LTE network technology, VoLTE is the inevitable trend in the development of LTE voice, but is limited by the VoLTE Terminal products and network devices not mature enough and the current state of the situation, the existing 4G to support and VoLTE system upgrade is needed, such as in the WindowsPhone8.1Update1 increase the support for the VoLTE.
The evolution of technology will be very long, but recently the three carriers is not a hard time, and facing a very complex situation. Whatever the reason, Unicom majored in 3G, main 4G location and telecommunications Telecom no longer have any hesitation in strategy, and through his foresight a year ahead of release, was later the policy space.
Today, China Telecom announced VoLTE-2015 commercial time, technical testing and validation of the technical specification and programming in 2016, a massive network, chips, terminals, network, service, interconnection and IT tests the FBI; the end of 2017, achieve commercial. Includes VoLTE+VoWiFi, HD voice, RCS, VoLTE international roaming. VoLTE compared 2G3G voice calls, sound quality and 40% can also bring lower access delay (waiting time after dialing), 3G drop 50%, probably in about 2 seconds. VoLTE dropped close to zero. The key is, a VoLTE, telecommunication can abandon CDMA standard, solve once and for all "in telecommunications as deep as the sea from this phone is bad" situation ... ...
On the VoLTE, a lot of people don't realize is, after mature 4G full coverage and VoLTE, market introduction of single 4G model Terminal, with three series of 2/3G high against the original chip terminals in the channel to promote the hit, which led to the disruptive impact on operator market. At this point, moving, telecommunications see very clearly.
Of course, if you do not take into account technological evolution and the revolutionary impact of open Terminal market, China Unicom now, because his voice fell itself is no problem, he 3G the Internet itself can be the perfect Voice over IP calls. On the last couple of years, no doubt technically Internet access and call the perfect experience of China Unicom. For advice on how to choose and that is why I 4G shoes says:
Best 3G+ top 4G= perfect experience!
Then, after mature 4G full coverage and VoLTE, market introduction of single 4G model Terminal, with three series of 2/3G high against the original chip terminals in the channel to promote the hit, which led to the disruptive impact on the operators market, Unicom what really want to think about the future?
Netizens gives the answer: If Telecom FDD obtained licence to sell 50 billion moves, estimated mobile certainly happy, right? After mixed network can be realized. And telecommunications and China Unicom cooperation, pooling resources to build a boutique FDD/TD-LTE mixed network, voLTE as soon as possible so that the two outstanding 4G, can save resources, but also for competitive, but also complementary and backup, network security, benefits, think about it drunk ... ...
"The author" 4G of China, telecommunications industry analyst, Erik core expert, micro-media: China 3G (china_3g), micro-blog: China 4G
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