Posts tagged ‘HD Voice’

Operator Spotlight – Interview with Du’s Haitham Mashal, Senior Director- CS Core at Du

Haitham Mashal, Senior Director- CS Core, Du

Haitham Mashal, Senior Director- CS Core, Du

Prior to the LTE Voice Summit (London, September 28th-30th), we interviewed Du’s senior core network Director Haitham Mashal about his views on the development of VoLTE, service planning and future opportunities. Here is what he had to say, ahead of his participation at this year’s summit.

Q. As we see the commercial launch, is there any clearer idea of whether VoLTE will truly live up to its promise?

A. No doubt VoLTE would even exceed its promise for both customers and Operators. Operators would have the chance to transform their networks into full fledge IP network and get the benefit of reducing both CAPEX and Opex. Operators would also be capable to offer better Voice quality with enriched services on top of the voice that can compete with OTT voice services.

Customers would enjoy the enriched crystal clear HD voice and shorter time setup. This would definitely enhance the customer experience and satisfy the customer demands to enjoy different services simultaneously even during call establishment.


The Promise of Voice over LTE: Overcoming Today’s Challenges

Femi Adeyemi, PhD LTE Solutions Architect, Fujitsu Network Communications

Femi Adeyemi, PhD
LTE Solutions Architect, Fujitsu Network Communications

This post was written by Dr. Femi Adeyemi, LTE Solutions Architect at Fujitsu Network Communications


Voice over LTE (VoLTE) is considered by many to be a revolutionary application, for both mobile operators and their subscribers:  Operators, once they establish VoLTE networks, will no longer have to maintain separate networks—circuit-switched for voice and packet-switched for data. As a result, they will see savings in both operational and capital expenses.  Subscribers who use VoLTE will be able to use high quality voice and data applications simultaneously, while enjoying greater clarity in voice calls.

However, VoLTE deployment has been slower than anticipated due to several challenges…


SKT in good voice as it shows operators the way to go

SKtAt the second day of yesterday’s LTE Voice conference, which took place in London, the presentation by Changsoon Choi of SK Telecom attracted a positive responses from the audience, and really brought home how ahead of the game the South Koreans are in LTE and with particular relevance to the conference, in terms of VoLTE.

Choi started with a simple list of SKT’s achievements in LTE so far. As of 2012 it had 99 per cent population coverage based on a dual layer 850MHz and 1800MHz multi-band network and currently has 89 cities running dual-carrier LTE Advanced, all of which means it’s no surprise is enjoys 48 per cent market share for LTE in the country.


VoLTE – Why it’s Imperative for LTE

Kaushal Sarasia, Assistant Manager, Marketing for Aricent.

Kaushal Sarasia, Wireless marketing for Aricent.

This post is by Kaushal Sarasia, Assistant Manager, Marketing for Aricent.

While LTE has established itself as the technology of choice to cater to the ever increasing demand for bandwidth one of the key challenges it faces is voice.

Given that LTE is an all IP network, the challenge is to provide seamless continuity for voice and video calls while using packets. The complexity means that operators are choosing to provide voice services via circuit switching by falling back to their legacy networks. This method of Circuit Switch Fall Back (CSFB) however, is rapidly falling out of favour as operators now want to leverage the full benefit of LTE by providing high definition voice/video services over LTE.

VoLTE not only helps operators reduce cost by eliminating the need to maintain legacy networks but also enhances the customer experience by providing distinct advantages such as high definition voice quality, simultaneous voice and data usability for rich service experience and seamless connectivity. The highly portable and scalable core network of LTE is being extensively leveraged by governments and other agencies for deployments in niche areas such as public safety for disaster management; here VoLTE becomes absolutely crucial for enabling vital voice communication during life critical operations. Moreover, VoLTE can help define a single wireless core network for both data and voice thus allowing multimedia communication involving voice, video and data at the same time. This can be leveraged to provide exceptional customer experience and to share critical information during disaster management.

Implementation of VoLTE is a complex undertaking that requires leveraging the IMS network and implementing specific QoS to enable seamless carrying of data and high definition audio/video quality. Its introduction impacts network elements across the spectrum including User Equipment (UE) (IMS Client), RAN (eNodeB), Core (EPC) and IMS Servers. The standards for VoLTE are still evolving and coupled with the complexity of implementing it means that it provides a huge opportunity for equipment manufacturers to introduce differentiation in their VoLTE solution.

An optimal VoLTE solution delivers an enhanced customer experience by providing many distinct benefits such as seamless HD voice/video quality, while enabling operators to reduce infrastructure cost and complexity. It also enables LTE equipment manufacturers to target this highly lucrative market by offering highly differentiated products, thus providing multiple benefits to every stakeholder in the LTE space. VoLTE has thus become an imperative for the success of LTE.

Aricent will be exhibiting at the upcoming LTE Asia conference, taking place on the 18th-19th September 2013 at the Suntec, Singapore. Click here to download a brochure for the event.

The inaugural LTE Voice Summit, dedicated to telecoms voice issues, is taking place on October 1st-2nd at the Hilton Paddington, London. Click here NOW to download a flyer.

VoLTE Interworking and Roaming

This is a guest post by David Zhang, CTO of Aicent

LTE, a radio access technology used to support only data access, was developed to carry all services as IP applications over an all-IP network, from mobile devices to the IP world. With this all-IP network deployed, mobile operators are migrating their existing services, such as voice and SMS, into an all-IP implementation in order to offer better quality voice services and make the most efficient use of the LTE spectrum compared to the legacy 2G and 3G voice.

Voice over LTE (VoLTE) is VoIP over LTE under the IMS framework. VoLTE was first introduced in 2010 by the GSMA, with detailed specifications of IMS for voice and SMS defined in GSMA PRD IR.92. Included in this definition is the Adaptive Multi-Rate Wideband (AMR-WB) protocol which allows for High Definition (HD) voice. It is used for superior sound quality over legacy standard voice protocols. Since HD voice can only be supported in an IP network instead of a TDM network, it has become a key differentiating feature for VoLTE in comparison to other voice services.

The benefit of offering VoLTE is not only to make it possible for mobile operators to offer better quality voice services, but also as an enabler allowing them to expand to other services such as rich communications, while at the same time making efficient use of spectrum for voice services and saving extra capacity for data services. By combining data and voice services on the same LTE data access network, mobile operators are able to integrate network resources, optimise network and service management, and simplify service delivery, resulting in a significant reduction of OPEX. In addition, the introduction of VoLTE enables mobile operators the capability to offer other innovative services, such as those from unified communications, social networking, and Rich Communication Suite. Further, VoLTE implementations can also be a strategy for mobile operators looking to distinguish themselves from Over-The-Top (OTT) players.

The first step for mobile operators is to deploy their VoLTE services for their domestic markets, followed by the interconnection between mobile carriers for the international markets. Besides VoLTE interconnection, VoLTE roaming is also a new area to be addressed. VoLTE roaming can be implemented using a local breakout approach just like today with voice roaming in TDM. We may also see that some operators start with VoLTE using home bound routing similar to today’s data roaming.

One implementation option defined by GSMA is to use IPX as the recommended infrastructure platform to VoLTE interworking and roaming, with the key components of the IPX platform containing QoS IP transport, Diameter Agent and SIP Proxy.

The LTE North America 2012 conference is taking place on the 14-15th November 2012 at the Fairmont Dallas Hotel, Texas. Click here to download a brochure.

Put the date in your diary now for the inaugural LTE Voice Summit, taking place in London on the 23rd-24th October 2013. 

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