By Christopher Cox
An creation to LTE explains the expertise utilized by 3GPP long-term Evolution. The e-book covers the full of LTE, either the ideas used for radio communique among the bottom station and the cellular phone, and the recommendations used for signalling verbal exchange and information delivery within the developed packet middle. It avoids pointless aspect, focussing as an alternative on conveying a valid realizing of the full system.
The booklet is aimed toward cellular telecommunication execs, who are looking to comprehend what LTE is and the way it really works. it truly is priceless for engineers who're engaged on LTE, particularly those who find themselves moving from different applied sciences reminiscent of UMTS and cdma2000, those people who are specialists in a single a part of LTE yet who are looking to comprehend the process as an entire, and those that are new to cellular telecommunications altogether. it's also suitable to these operating in non technical roles, corresponding to venture managers, advertising and marketing executives and highbrow estate specialists. On finishing the ebook, the reader can have a transparent knowing of LTE, and may be ready to take on the extra specialized books and the 3GPP requirements with self assurance.
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Additional resources for An Introduction to LTE: LTE, LTE-Advanced, SAE and 4G Mobile Communications
4 3GPP speciﬁcation releases for UMTS and LTE Release Date frozen New features R99 R4 R5 R6 R7 R8 R9 R10 R11 March 2000 March 2001 June 2002 March 2005 December 2007 December 2008 December 2009 March 2011 September 2012 WCDMA air interface TD-SCDMA air interface HSDPA, IP multimedia subsystem HSUPA Enhancements to HSPA LTE, SAE Enhancements to LTE and SAE LTE-Advanced Enhancements to LTE-Advanced LTE was ﬁrst introduced in Release 8, which was frozen in December 2008. This release contains most of the important features of LTE and we will focus on it throughout the early chapters of the book.
There are two aspects to this. Firstly, the requirements state that the time taken for data to travel between the mobile phone and the ﬁxed network should be less than ﬁve milliseconds, provided that the air interface is uncongested. Secondly, we will see in Chapter 2 that mobile phones can operate in two states: an active state in which they are communicating with the network and a low-power standby state. The requirements state that a phone should switch from standby to the active state, after an intervention from the user, in less than 100 milliseconds.
And to charge the user for it directly, but can be inefﬁcient if the user is travelling overseas, particularly during a voice call with another user nearby. To deal with this situation, the speciﬁcations also support local breakout, in which the PDN gateway is located in the visited network. The HSS indicates whether or not the home network will permit local breakout, for each combination of user and APN . The interface between the serving and PDN gateways is known as S5/S8. This has two slightly different implementations, namely S5 if the two devices are in the same network, and S8 if they are in different networks.