3GPP Long Term Evolution (LTE)_ Voice Solutions in LTE
Transcript of 3GPP Long Term Evolution (LTE)_ Voice Solutions in LTE
8/20/2019 3GPP Long Term Evolution (LTE)_ Voice Solutions in LTE
http://slidepdf.com/reader/full/3gpp-long-term-evolution-lte-voice-solutions-in-lte 1/7
LTE is a standard for wireless communication based on 3GPP technologies, promising h igh-speed data for mobile phones and data terminals
3GPP Long Term Evolution (LTE)
Ho me L TE F re qu en cy Ba nd s Q ui z L TE T hro ug hp ut Ca lc ul at or 3GPP r eleases summary
Voice solutions in LTE
The or iginal idea behind LTE is tha t it would provide only wireless internet services. However, major revenue for cellular operators
comes from voice calls and SMS and therefore Voice in LTE has become a hot topic. Recently, I got an opportunity to work with
various voice solutions-the experience which I believe would be usef ul to share here.
LTE does not have a 'circuit switch core' which means that we cannot have voice calls as it is in 2G and 3G technologies. In the initial
LTE deployment cases however, operators are using their legacy networks along with their 4G network for voice services.
So far we have heard of the following available voice solutions which I will discuss briefly.
Circuit Switched Fall Back (CSFB)
Simultaneous Voice and LTE (SV-LTE)
Voice over LTE (VoLTE)
Voice over LTE via Generic Access (VoLGA)
Over the top (OTT)
An operat or who deployed LTE network, already owning a 3G or 2G networ k can take be nefit fr om the feature called "Circuit
switched fall back'. The main idea is that 4G smartphones are going to have a radio capabilities for 3G/2G networks as well. Such
handsets can connect at a time either to LTE or 2G/3G . The shortcoming is that someone on voice call will not be able to use LTE
network for browsing or chatting etc.
CSFB for operator means very little investment since only few modifications are required in the network. Additional interface between
Circuit Switched Fall Back
Recent Posts Widget
LTE Physical UplinkControl Channel(PUCCH)
Nokia reinvents telcosfor the cloud
Connected Mode DRX
Recent Posts
Join this site
with Google Friend Connect
Members (221) More »
Already a member? Sign in
Followers
39,302
Pageviews last month
Live Traffic Feed
Transport Block Size, Throughputand Code rate
Quality of Service (QoS) in LTE
Default Bearer, DedicatedBearer... What exactly is bearer ?
Primary and secondarysynchronization signals (PSS &SSS) in LTE
Random Access Procedure inLTE
RSRP, RSSI and RSRQ
System information block 2 (SIB2) in LTE
GPRS Tunneling Protocol (GTP)in LTE
ICIC and eICIC
Popular Posts
2 Plus Blog suivant» [email protected] Tableau de bord Déconnexion
Ce site utilise des cookies provenant de Google afin de fournir ses services, personnaliser les annonces et
analyser le trafic. Les informations relatives à votre utilis ation du site sont partagées avec Google. En acceptant
ce site, vous acceptez l'utilisation des cookies.
EN SAVOIR PLUS OK !
8/20/2019 3GPP Long Term Evolution (LTE)_ Voice Solutions in LTE
http://slidepdf.com/reader/full/3gpp-long-term-evolution-lte-voice-solutions-in-lte 2/7
MME and MSC is required (SGs). CSFB solution has also been standardized by 3GPP and has gained large industrial support.
SV-LTE is handset specific in which handset is capabile of using two radios (LTE and WCDMA/GSM/CDMA) at one time. So a user
can use packet services from LTE while voice call can be made on other networks simultaneously unlike CSFB. The shortfall here is
high battery utilization due to dual radio operation.
For CDMA and LTE pair, the SV-LTE is the standard solution and being widely adopted. There a re already SV-LTE smartphones
available in the market. I came across a few available for LGU+ in Korea and Verizon in USA. Both operate LTE networks as anoverlay to their old CDMA networks.
SV-LTE is the cheapest option for operators as no new modification is required to the network. Nevertheless, as mentioned earlier it
is at the cost of high battery utilization
I believe this is going to be the most popular and widely adopted future voice solution for LTE. Instead of using legacy networks,
VoLTE utilizes IP Multimedia Subsystem (IMS) and provides voice services using the application layer on LTE.
IMS is a group of core network entities responsible for providing rich multimedia services over IP network. VoIP call, SMS, MMS, LIVE
Simultaneous Voice and LTE
Voice over LTE (IMS)
Live Traffic Feed
Real-time view · Get Feedjit
A visitor f rom Plano,Texas viewed "3GPPLong Ter m Evolution(LTE): RRC ConnectionEstablishment in LTE" 3
ins ago
A visitor from Germanyiewed "3GPP Long
Term Evolution (LTE):Quality of Service (QoS)in LTE" 3 mins agoA visitor from Bangalore,Karnatak a viewed "3GPP
Long Term Evolution(LTE): Primary andsecondarysynchronization signals(PSS & SSS) in LTE" 4
ins ago
A visitor from Lebanoniewed "3GPP Long
Term Evolution (LTE):Quality of Service (QoS)in LTE" 9 mins agoA visitor from Sweden
iewed "3GPP LongTerm Evolution (LTE):Transport Block Size,Throughput and Codeate" 12 mins ago
A visitor from Korea,
Republic of viewed"3GPP Long TermEvolution (LTE): System
"
2016 (2)
2015 (7)
2014 (1)
2013 (5)
2012 (20)
December
(1) November
(1)
October (4)
July (1)
June (7)
May (6)
AutomaticNeighbor Relation(ANR) in
Blog Archive
TTI Bundling
Search
Search This Blog
Sélectionner une langue
Translate
cellsearch (3)
ims (3)
LTE (12)
Nokia Networks (3)
RRC states (3)
VoLTE (5)
Labels
8/20/2019 3GPP Long Term Evolution (LTE)_ Voice Solutions in LTE
http://slidepdf.com/reader/full/3gpp-long-term-evolution-lte-voice-solutions-in-lte 3/7
TV are a few such services. IMS has been in the communication industry for long but with the emergence of 4G networks, it is
gaining popularity again.
I think, operators will accept VoLGA as a last option for voice capability. This solution uses CS core only from legacy networks and
also require new network elements. Therefore LTE handsets do not need 3G/2G radio capabilities since radio part won't be used
from legacy networks. Good thing about this solution however is that unlike CSFB, LTE handset will be able to use voice and
data simultaneously.
Voice over LTE via Generic Access
LTE
DefaultBearer,DedicatedBearer...Whatexactlyi...
TTIBundling
Voicesolutionsin LTE
BatteryconsumptionissuesandConnected ModeDRX ...
Signalingload inLTE ascompared to 3Gnetworks
The views expressed in this
blog are my own and in no
way reflect the views of
my employer. I hope this
sharing of knowledge will
not only be beneficial to
others, but a great learning
experience for myself too
About This Blog
8/20/2019 3GPP Long Term Evolution (LTE)_ Voice Solutions in LTE
http://slidepdf.com/reader/full/3gpp-long-term-evolution-lte-voice-solutions-in-lte 4/7
OTT is actually not LTE specific but a generic solution that we already have been using on 3G/WiFi networks. OTT application is
completely transparent to network and also out of operators' control. I am talking about generic VoIP clients like Viber, skype, Tango
etc. They do not give the real taste of voice flexibility as in other 3GPP networks and also lack the QoS for voice. Nonetheless, these
will be widely used by the consumers as an alternative, because of the fact that it gives them full flexibility to choose their own
service.
Over the top VoIP application
+2 Recommend this on Google
10 comments:
JoeHQS May 22, 2012 at 6:27 AM
Adnan, it is a great summary, concise and clear , the orientation you gave the ar ticle is p erhaps not clear ed by the title though.
Reply
Adnan Basir May 22, 2012 at 8:37 AM
Thanks for your appreciation.. I will come up with better title :)
Reply
Anonymous May 24, 2012 at 8:51 AM
Adnan, app reciate t his summary. It re ads well for n on-technologists, as well as techno logists.
I wonder if you can use this summary as a basis for going into more depth on the whole public safety, utilities, homeland
security and other critical infrastructure markets need for Mission Critical Voice (MCV) communications (w/respect to
preserving, replicating or otherwise comparatively providing positive present capabilities of LMR); and speak to each of these
options from that perspective? Such a summary/analysis would be quite useful to the US/North American market now with
8/20/2019 3GPP Long Term Evolution (LTE)_ Voice Solutions in LTE
http://slidepdf.com/reader/full/3gpp-long-term-evolution-lte-voice-solutions-in-lte 5/7
Replies
Reply
respect to the newly established US FirstNet authority and their effort to plan and stand up the nationwide public safety
broadband network (NPSBN) based on LTE (as approved by FCC), and with respect to Canada's effort; and would help follow
on the APCO Global Alliance's support for LTE as the international public safety broadband platform worldwide.
http://apcoglobalalliance.org/4g.html
From a public safety/mission critical perspective, gaining an LTE MCV solution is as much of a cost issue as anything else, as
these markets cannot afford to continue to build and maintain two separate communications systems in the long run, and
must gain mission critical data and video capabilities without compromising their current mission critical voice capabilities.
Finally, what are the emergency call implications for each of these options, with respect to US "911" and other countries'
counterpart systems/networks? As commercial providers ponder these options, these are issues they should be incorporating
into their thinking, as governments and consumers expect and will demand them anyway. With the right attitude, industry can
capitalize on these expectations to partner with government and customers to create new products and services applicable to
the larger consumer space based on these public safety needs, as has been previously realized with location-based
technology.
Reply
Adnan Basir May 26, 2012 at 7:49 AM
Hi Thanks for your detailed feedback.. I do not have much understanding of MCV market right but as you
mentioned, I will definitely try to get an insight into it and will come back to you :)
Diametriq July 24, 2012 at 12:36 PM
http://www.diametriq.com/the-role-of-the-diameter-signaling-controller-dsc-in-lte-and-volte/
The evolution of the 2G/3G to 4G LTE mobile data network focuses on high data-rate, low-latency and packet-optimized
architecture integrated with multi radio access technologies. At the heart is the all-IP Evolved Packet Core (EPC) and voice-
over-LTE (VoLTE) reuses the IP Multimedia Subsystem (IMS). The control plane of the EPC utilizes Diameter as its base [...]
Reply
Luis November 11, 2013 at 11:59 AM
Hi Adnan, I am new in this blog and while I was reading through this Voice solutions in LTE, above I found one that you refer
as to Voice over LTE via Generic Access: You mentioned that this solution uses CS core only from legacy networks and also
requires new network elements. Therefore LTE handsets do not need 3G/2G radio capabilities since radio part won't be used
from legacy networks. Good thing about this solution however is that unlike CSFB, LTE handset will be able to use voice and
data simultaneously. My question is: How is this Voice in LTE solution will be or is implemented since it only use the CS legacy
core network to make it happen? It is not clear to me about the RF transmission part for voice only. Will it overlap over the
LTE (OFDMA / SC-FDMA) frequencies (in-parallel frequency tansmission for voice only?) in order to be able to enable voice
and data simultaneously?? And what is the new network elements used for this to happen?
Reply
Adnan Basir November 25, 2013 at 11:59 AM
Hi Luis,
LTE UE will establish ipsec tunnel to the "new network element" which exist between LTE and legacy CS network. This new
8/20/2019 3GPP Long Term Evolution (LTE)_ Voice Solutions in LTE
http://slidepdf.com/reader/full/3gpp-long-term-evolution-lte-voice-solutions-in-lte 6/7
Sign out
Notify me
Enter your comment...
Comment as: Felij (Google)
Publish
Preview
network element is referred to as VoLGA Access Network Controller (VANC). There is no need for new RF transmission part.
Since you know LTE is all IP based. therefore the voice traffic between LTE device and VANC is IP based (VoIP). This
scenario is pretty similar to VoLTE (IMS) except we will not be using ims core network but LTE radio side will pretty much act
the same way.
My source of information is based on following article :
http://cm-networks.de/volga-a-whitepaper.pdf
Reply
anderson October 29, 2015 at 11:16 PM
Fantastic articles is post by you in this blog. You give a nice thing. Thank you for such a nice article. Every word of this blog
helps me to give detail to me.
Visit: Voip Business Phone System
Reply
James Gross November 14, 2015 at 7:07 AM
Reply
Luger D November 15, 2015 at 7:17 AM
Voice over solutions and the recommendations have been so true with certain aspects because those are generally
considered more important and there are more solutions you will come to understand. voice over serviceReply
8/20/2019 3GPP Long Term Evolution (LTE)_ Voice Solutions in LTE
http://slidepdf.com/reader/full/3gpp-long-term-evolution-lte-voice-solutions-in-lte 7/7
Newer Post Older PostHome
Subscribe to: Post Comments (Atom)
You may reproduce the content of this website only if you provide this website as original source. Awesome Inc. template. Powered by Blogger .