Kineto Smart Wi-Fi Calling on T-Mobile

This week I'm in New York City for Interop and had a chance to catch up with Steven Shaw with Kineto Wireless. Kineto developed the Smart Wi-Fi calling application which enables smartphone users to automatically use Wi-Fi network connections for both voice and SMS/MMS. Wi-Fi calling can provide superior indoor coverage and quality where cellular carriers typically struggle. In the United States, T-Mobile is the only carrier offering integration for Wi-Fi calling at this time.

T-Mobile subscribers must add the "Free Wi-Fi Calling" service to their rate plan, which is no additional charge since May of this year. Previously, the Wi-Fi calling still counted against plan minutes.

The Smart Wi-Fi application relies on Unlicensed Mobile Access (UMA) technology, which is based on the 3GPP (international GSM mobile standards body) Generic Access Network (GAN) standard. This is an extension of the GSM standard and is not available with CDMA networks such as Sprint and Verizon in the U.S. Of the two GSM networks only T-Mobile provides support for UMA today. However, with AT&T heavily investing in Wi-Fi hotspots through the Wayport acquisition and footprint expansion, it will be interesting to see if they become more receptive to Wi-Fi calling in the future. Additionally, Verizon and Sprint are unlikely to be receptive to this technology once they migrate to LTE, as both companies are pursuing other IP-based calling protocols instead of GAN and are looking to protect their average revenue per user (ARPU). Both companies have also declined to pursue Wi-Fi data offload to this point, but cellular network capacity issues may reach a critical level in the coming years prompting a change in direction out of necessity. Only time will tell.

Wi-Fi calling works by having the smartphone create a secure connection to the mobile network gateway by authenticating using EAP-SIM and establishing an IPSec VPN tunnel over the Wi-Fi network. The mobile network gateway presents itself to the mobile core as any other radio network controller, which turns the Wi-Fi or public IP network into another radio access network (RAN) similar to cellular towers. This also enables the full suite of mobile services to be available over the Wi-Fi network to ensure service parity and consistency of user experience.

Smart Wi-Fi Calling Routes Calls Over Any Wi-Fi Connection

T-Mobile users purchasing supported smartphones do not need to download the Smart Wi-Fi application, it comes pre-installed by the carrier (it's not available in the Android Market). Support for Smart Wi-Fi calling varies by model, so be sure to check out the list of supported Android phones on the Kineto website. Wi-Fi calling is enabled on the smartphone by default, but users can disable the service if desired by changing a single configuration setting within the application. A small blue callout bubble icon appears in the notification bar in the upper left corner when Wi-Fi calling is available. During an active Wi-Fi call the icon turns green.

The Kineto Smart Wi-Fi calling is enabled by default,
and provides easy configuration for users

Kineto has also optimized integration with Android to disable the 3G radio when Wi-Fi calling is active in order to maintain long-lasting battery life on the smartphone. There is really no need for both radios to be active at the same time since Wi-Fi now handles all voice and data services. This is a smart feature by Kineto, since smartphone battery life can be a deal-breaker for most consumers. One drawback to the consumer solution with T-Mobile is that once a call is placed or received it cannot be switched between the cellular network and Wi-Fi network with the Android Smart WiFi application. This is different than T-Mobile's enterprise UMA implementations on Blackberry and Nokia devices which allow in-call handover between cellular and Wi-Fi networks.

Kineto provided me with an HTC Sensation on loan for a few weeks to evaluate the service. Overall, I found the experience to be extremely intuitive and simple for users. Voice quality over Wi-Fi was excellent, although that could be highly variable depending on the performance of the Wi-Fi network the user is attached to. Voice calls only require around 80 Kbits of bandwidth over Wi-Fi, so it should work adequately over most public hotspot networks. I trialed the service over multiple Wi-Fi networks, including my home, enterprise, coffee shop (Caribou), and an AT&T hotspot, and never experienced any call quality issues. In fact, compared to T-Mobile's cellular coverage, call quality was actually better over Wi-Fi in most cases!

There are multiple benefits of this solution to consumers. First, Wi-Fi calling improves coverage reception in most indoor locations by leveraging a high-quality Wi-Fi signal at the micro-cell level rather than relying on poor penetration from the outdoor macro-cell carrier network. Second, when users offload calls to Wi-Fi they don't count against their bundled plan minutes on T-Mobile and can help consumers reduce costly overage fees on limited minute plans or save money by switching from an unlimited plan. Third, individuals that travel internationally can eliminate expensive roaming charges. Finally, a side benefit is increased incentive for users to connect to Wi-Fi in general, resulting in a (typically) faster data connection for browsing the web, watching videos, or checking up on Facebook posts.

On the enterprise side, Wi-Fi calling can help reduce overall cellular plan expenses across the organization by leveraging investment in corporate Wi-Fi networks already in place. Many teleworkers also work out of locations with public Wi-Fi frequently, such as coffee shops, cafes, and bookstores. In addition, Wi-Fi calling can help enterprises avoid the expense of in-building cellular coverage enhancement with cellular repeaters.

I caught up with Steven Shaw from Kineto Wireless at Interop, NY 2011 and asked him a few questions about Smart Wi-Fi.



Revolution or Evolution? - Andrew's Take
Wi-Fi calling is a clear benefit for both consumers and enterprises. It offers improved indoor coverage utilizing Wi-Fi networks, reduces minute plan usage and expenses, offers cheap international calling, and the implementation by Kineto is seamless and intuitive. There is really no reason not to use this service if you are T-Mobile subscriber in the U.S. Kineto also has a large presence in Europe and predominantly GSM cellular markets.

It's disappointing that U.S. based carriers other than T-Mobile have been unresponsive to this service to-date. I'm not sure Wi-Fi calling is a compelling enough service for users to switch carriers today. But with mobile data demands only increasing and the emergence of Hotspot 2.0 roaming between macro cellular networks and micro Wi-Fi networks, Wi-Fi offload strategies will become more predominant. This provides opportunities for carriers to improve indoor coverage by leveraging existing private network infrastructures. Whether this will materialize is yet to be seen. One thing is for sure, the technology exists today and it's an issue of business development and market approach by the carriers holding this service back. Perhaps pressure from over-the-top voice and SMS services like Google Voice, Skype, and Facetime will compel the carriers to keep pace.

For more information:
- Kineto Wireless
- Smart Wi-Fi powered by UMA
- Wi-Fi Calling Overview and Smartphones Supported
- Kineto Case Study - Enterprise Benefits of Wi-Fi Calling
- T-Mobile Wi-Fi Calling Support Document

Cheers,
Andrew

Full Disclosure - Kineto Wireless provided an HTC Sensation smartphone and pre-paid T-Mobile SIM card on loan for review of their Smart Wi-Fi application and service. However, all opinions are purely my own and I was not otherwise compensated for this review.

A Look Ahead to Possible Wi-Fi Industry Trends in 2011

Many of the trends from the past year will carry over into 2011 and continue to impact the industry, while a few new developments are poised to radically alter the landscape. Here are my projections for some of the developments we should expect to see in the coming year.

1. Wireless as the Primary Enterprise Access Medium – spurred by large-scale adoption of 802.11n equipment, more organizations and employees will increasingly rely on Wi-Fi networks for the bulk of their work. Although a complete shift to Wi-Fi is unlikely except for a minority of organizations aggressively seeking expense reduction, most organizations will realize that the benefit of a scaled-down switching infrastructure, eliminating unused switch port capacity, and deploying greater capacity Wi-Fi networks to handle mobile workers.
   
   
2. Smart-AP Architectures Begin to Emerge from Market Leaders – just as 2010 saw established competitors challenge the common wireless controller architecture, market leaders will look to begin migrating to a more distributed architecture with smart APs. As industry experts continue to recognize that controller features can now cost-effectively be implemented in smart APs, market leaders will be forced to react and keep pace, or face continuing erosion of market share to innovative up-and-comers. However, the transition for large established equipment manufacturers will not be easy, having to support current customers with a deployed base of controllers as well as customers still running legacy autonomous access point architectures. Watch for product feature sets to begin migrating back into the smart APs in 2011, but don’t hold your breath for a viable large-scale controller-less solution, as ditching the controller will be tough given their wealth of feature that need to be migrated. Also, implementing coordination among smart APs will be limited to small groups of APs upon first release to ensure product stability. Watch for the large vendors to position these smart APs in parallel to existing controllers to prevent erosion and cannibalization of existing revenue streams, targeting smaller SMB/SOHO deployments for initial product releases while continuing to recommend controllers for larger installations.
   
   
3. Consumer Device Adoption in the Enterprise Becomes the Norm – enterprise Wi-Fi networks are a bit of an anomaly, having gained broad adoption in the consumer space long before enterprise. As such, Wi-Fi is viewed more as a utility by employees, who more commonly expect to connect any device to any network to get connected. Underscoring a major societal and cultural trend of the connected lifestyle, enterprises will be forced to support consumer-grade devices on corporate networks. This will present challenges for IT departments to provide secure and controlled access to corporate data. Mobile device management (MDM) solutions will increasingly be sought after to manage the great diversity in client platforms. Wireless network engineers will need to take care to architect solutions to alleviate poor consumer device performance and ensure mission-critical devices and applications achieve the required QoS and SLA required. Watch for organizations to take baby steps in support of these devices while they develop broader strategies for device funding, liability, and security compliance. Support may initially be limited to Internet and/or thin-client access to corporate applications and data, with broader access following strategy definition and procurement of management solution.
   
   
4. Mobile Commerce Leads to More Retail Hotspots – if 2010 was the year of mobile advertising, 2011 will be the year of mobile commerce and greater consumer interaction. Retailers are looking to keep pace in highly competitive markets and adjust to shifts in consumer behaviors, specifically targeting mobile commerce applications. Wi-Fi hotspots have long been a staple of cafés and bookshops, but will see increasingly broad adoptance among other retailers looking to provide a mechanism for customer engagement while in-store where they have the most influence at the product location. Wi-Fi will serve as a foundation for mobile commerce and marketing applications due to its pervasive presence in consumer smartphones and the lack of adequate 3G/4G cellular data network coverage within many brick-and-mortar facilities. Retailers will need to be careful to ensure the content is engaging, relevant, and provides a great customer experience. Watch for more hotspots to spring up throughout 2011.
   
   
5.  Emergence of Smart Meter, M2M, and Sensor Networks – wireless sensor networks have long been confined to the realm of university research and limited deployment mainly in the structural engineering field. However, this technology is maturing to the point where mass-market adoption is within the realm of possibility. Use-cases in the enterprise for smart buildings, energy efficiency, and better facilities monitoring and management coupled with commercial products for the consumer market with products to enable a connected home (thermostats, televisions, blu-ray players, home entertainment and set-top boxes, etc.) will bring smart meter, machine-to-machine (M2M), and sensor networks into the mainstream. Manufacturing costs are reaching low enough levels to allow product pricing to reach inflection points which could drive mass consumption by consumers. Enterprises, on the other hand, will be slower to adopt this technology due to investment in current systems, and deployment will likely be reliant on the rebound of the economy to spur new facility construction. Also watch for government funded economic stimulus projects to make increasing use of this technology. Sensor networks hold the potential to radically shift how Wi-Fi networks operate, shifting from human interaction networks to largely automated systems that require higher levels of stability and consistent network operation. Wi-Fi engineers should be able to proactively identify these shifts and manage network changes to provide greater availability and capacity.

What trends will you be watching for in 2011?

Cheers,

Andrew