VoLTE Single Radio Voice Call Continuity (SRVCC)

What is Single Radio Voice Call Continuity (SRVCC)?


SRVCC is an LTE functionality that allows a VoIP/IMS call in the LTE packet domain to be moved to a legacy voice domain (GSM/UMTS or CDMA 1x).

Consider a case where a new LTE network operator wants to move voice services to VoIP over IMS in conjunction with the deployment of an LTE access network. In the absence of other options, this operator would need to provide ubiquitous LTE coverage on day 1 to have a competitive VoIP service. However SRVCC enabled LTE may not require complete LTE coverage. 

Learn more LTE Training 

 

Evolution from GSM to LTE-Advanced and Voice over LTE (VoLTE)

From GSM to Voice over LTE (VoLTE)

Voice-over-LTE is a big deal for mobile operators worldwide today moving subscribers from their traditional 2G networks to their new 4G networks. Operators want to to get off of GSM and CDMA and on to LTE to increase their capacity tenfold or more for their networks.

Voice and messaging services for Long-Term Evolution (LTE) is happening.  Using IP Multimedia Subsystem (IMS) developed by 3GPP, end-to-end voice and SMS messaging along with Roaming and Interconnection is a reality now.

VoLTE is built upon underlying 3GPP principles including LTE and IMS. VoLTE has similar characteristics like Vonage. It is more than just Voice over IP (VoIP). The IP networks are mostly managed with MPLS or other layer 2/3 techniques.

Rather than connecting an legacy circuit switched call, VoLTE calls are transmitted over LTE EPC and IMS networks using SIP as the signaling protocol.

VoLTE can use "HD Voice" or Rich Communication Services (RCS) will merge picture and video messaging.

RCS (Rich Communication Services) will deliver high quality voice and SMS by providing them with instant messaging or chat, live video and file sharing across any mobile device, on any network.  

Mcirowave Backhaul for LTE

Wireless Backhaul for LTE and LTE-Advanced

LTE mobile network operators can  chose between microwave and fiber solutions. The benefits of microwave backhaul is more scalability and less costly. Microwave is reliable and it is a viable  backhaul solution.  LTE backhaul capacity needs are being easily addressed by packet microwave today with speed up to 1 Gbit/s.

 Microwave backhaul is not as susceptible to construction accidents.  Millimeter technology allows for high-density deployments, facilitating co-location and facility sharing. For example, 80 GHz systems can achieve multi-gigabit speeds at 5-6 mile ranges with high service availability.
  

 Why Microwave Backhaul for LTE:

• Lower transport costs and no monthly fees 
• Faster deployment time  
• Higher density deployments 
• High reliability 

 

LTE traffic will be dominated by data, and multimedia  applications ranging from non-real time services such as email , web browsing, peer-to-peer, video, location based services, maps,  and file sharing to real-time and delay sensitive services such as video and voice. LTE-ready microwave backhaul systems must deliver high capacity and low latency over an IP network with important features such as:

•  QoS aware Adaptive Coding and Modulation supporting QPSK, 16QAM, 64QAM and 256QAM
• Statistical Multiplexing
  Ethernet rings using IP/MPLS, PBT or Carrier Ethernet
• Carrier Grade Ethernet switch as part of the Radio link up to 99.999% availability

LTE Training - Long Term Evolution (LTE) Training

Long Term Evolution (LTE) Learning

by ADMIN on FEBRUARY 18, 2013

One interesting facet of the convergence of mobile broadband and IP world is this new emerging LTE , Long Term Evolution, technology that will take the place of traditional mobile networks globally in the near future. TONEX actually started its LTE Training in 2004 , which really has surprised many people. It’s better to learn LTE, VoLTE, LTE RF Engineering and LTE-Advanced now and become an expert in this field so you can have a leg up on the rest of the engineers when it’s time to get a job.

We also offer a LTE RF Planning and Engineering course where it teaches you LTE propagation modeling, planing and RF Optimization. It might seem complicated to you but these courses look pretty good.  The bottom line is that knowing LTE as a project manager, or being a LTE systems engineer can make for a very lucrative career choice.  

LTE-Advanced Training Course

LTE-Advanced Training Course by TONEX: The true 4G based on ITU's  IMT-Advanced

TONEX Advanced-LTE training 2-day course is a unique crash course, bootcamp style that covers all aspects of  Advanced-LTE

Topics Included: Motivation behind LTE-advanced, major new key features such as as carrier aggregation, enhanced advanced antenna techniques for the DL/ UL, relay repeaters, and coordinated multipoint (CoMP) transmission and reception, requirements, network architecture, security, coverage, performance, required enhancements in LTE and migration strategies for LTE-Advanced deployment.

 


LTE–Advanced provides higher bitrates in a cost efficient way and, at the same time, completely fulfill the requirements set by ITU for IMT Advanced, also referred to as 4G.
4G LTE or LTE-Advanced was specified initially in Release 10 of the 3GPP standard in 2010.

LTE-Advanced supports wider frequency bandwidths (40MHz or more). Carrier aggregation was introduced in Release 10 to allow combining multiple pipelines together to create a larger single pipeline (provide backward compatibility with LTE ) . This is very similar to 802.11n and 802.11ac/ad or concept of channel bonding for wireline broadband networks.