News Release

Industry Team Advances Wireless IP Communications Through Design of an Advanced Mobile Communications Architecture

"Best and Brightest" at Verizon, Cisco, Lucent Technologies, Motorola, Nortel, and Qualcomm Team to Develop "A-IMS" - Evolution of Next-Generation Architecture for Mobile Networks
Jul 27, 2006

BASKING RIDGE, NJ - July 27, 2006 - Verizon, together with key telecom industry suppliers, today announced a vision for the advancement of next-generation network architecture for wireless mobile telecommunications networks. Dick Lynch, Executive Vice President and Chief Technical Officer at Verizon Wireless, said the company has been working for nearly a year with a task force of the industry's "best and brightest" network engineers and strategists from Cisco, Lucent Technologies, Motorola, Nortel and Qualcomm. Their goal has been to develop enhancements to a well known, emerging architecture, known as IMS (IP Multimedia Subsystem).

The multi-vendor team has generically termed this architecture A-IMS - for Advances to IMS -- in order to reflect its evolution from work done earlier in technology standards bodies. The A-IMS architecture developed by the task force provides solutions to implement next-generation services in current networks, as well as creates a foundation for the efficient roll-out of both SIP- and non-SIP-based services in future networks.

IMS is generally accepted as a core component of virtually all next-generation, IP-based communications networks for SIP-based applications, and is designed to assure standardization of multi-media services across all of these interconnected networks.

Lynch said, "We applaud the visionaries who have done a great job developing IMS over the last few years. But as we approached implementation planning, it became apparent that there are some practical, real-world issues that need to be addressed if we are to transparently and completely deploy and maximize the use of this new architecture. To us, it is also important that it be built to support the bridging of the present non-IP reality as we transition to the future. As people look at what our task force has accomplished, I expect that they will see significant benefits, including embedding VoIP hooks into the lower levels of the stack and addressing security issues in a more systemic way. These are exciting advancements that are headed rapidly into our mainstream technology roadmap."

The current outputs of the task force are a concept document and an architecture document that are being provided to industry leaders. From these documents, the task force companies plan to make necessary standards contributions in the immediate future.

"The promise of IMS is extraordinary, for wireless service providers, as well as for all network providers. A-IMS enhances the opportunity for success for not only the network providers but also for companies in technology, infrastructure, handset manufacturing and service design and, most importantly, for the consumer," said Charlie Giancarlo, Chief Development Officer, Cisco.

"Having been at the forefront of creating IMS-based next generation multimedia solutions for mobile networks, we recognize the benefits of this collaboration, particularly in terms of multi-vendor interoperability, as we move into an all-IP mobility world," said Paul Mankiewich, Chief Technology Officer, Lucent Technologies Network Systems Group. "This effort continues to enable the delivery of blended voice, video, data and multimedia applications, what we call Blended Lifestyle services, to mobile end users."

"This joint task force has defined the missing transition step from today to pure IP architecture, and knowledge learned from this effort will help us in development of seamless mobility solutions using this new architecture. We see operators adopting A-IMS to deploy a unified platform for the rapid deployment of new services, including SIP-based interactive applications and non-SIP applications, all of which run on top of IP," said Fred Wright, Senior Vice President, North America Region, Networks & Enterprise, Motorola.

"With our extensive experience deploying VoIP networks and SIP-based applications worldwide, we have a unique understanding of the system requirements and design and configuration enhancements necessary for successfully implementing VoIP in a wireless environment. With the augmentations to the current standards we envision coming from A-IMS, wireless VoIP can efficiently arrive in the mainstream a lot sooner," predicted Richard Lowe, President, Mobility and Converged Core Networks, Nortel.

"With A-IMS, QUALCOMM will be able to provide a consistent client environment that will drive the faster deployment of new and innovative IP-based applications," said Roberto Padovani, Chief Technology Officer, QUALCOMM. "By deploying an access-agnostic A-IMS- based core network, operators will benefit from seamless integration of a rich array of services delivered across access technologies. A-IMS also provides operators flexibility in configuring and controlling services, and allows the device client to implement consistent policies for dealing with air interfaces, security, signaling and multi-media capabilities, while freeing the application developer to focus on providing compelling functionality to the user."

The A-IMS standard is based on several key architectural principles, including:

  • Comprehensive Security: Security is more than authentication, and involves all components in the network, including the devices. Indeed, security agents run on the network devices, providing reverse-firewalls to protect the network from the device and to aid in posture assessment during logon. Comprehensive security also requires the Security Manager to monitor the network at all times, determine baseline traffic patterns, and then use those to detect and respond to anomalies. To respond, the Security Manager can change server configurations, install firewall rules or modify Intrusion Detection Services (IDS) behaviors.
  • Uniform Treatment of SIP and non-SIP Applications: To the greatest degree possible, A-IMS allows the service provider to manage and control both SIP and non-SIP applications in a uniform way. This is done primarily by usage of the Policy Manager (PM), which allows the service provider to manage the usage of network resources on behalf of both types of applications. Key network functions, including mobility, roaming and packet accounting are also defined in ways that allow them to support both types uniformly.
  • Dual Anchoring: A-IMS provides a mobile terminal with two IP addresses - one anchored in a Bearer Manager (BM) in the visited network, and one in a BM in the home network. Service provider policy controls which address is used for which applications. This allows for latency sensitive applications to use the visited anchor, whereas applications that require greater levels of service provider control can use the home anchor.
  • Three-Layer Peering: When connecting to roaming partners, peering occurs at three layers: security peering, used for access authentication, IP peering, used for transport of bearer traffic, and policy peering, used for control of bearer services. Policy server peering involves the usage of a policy server in both the home and visited networks. Usage of two allows for the home provider policies to apply even while roaming, yet allows them to be tempered by visited network policies on usage of the network.
  • Multi-Tiered Service Interaction Management: Feature interaction management across SIP-based applications, and between SIP and non-SIP applications is provided. Feature interaction management is linked with network policies, allowing for application interaction decisions to take into account the state of the network. The architecture also allows for extensibility to new interaction resolution mechanisms through the addition of service interaction application servers.

Highlights of the A-IMS plan clearly define several "pillars" as essential to the architecture:

  • Bearer Manager (BM): Allocates resources and manages bearer traffic to meet customer's service quality requirements. The primary functions include policy enforcement, mobility management, security, accounting, and access control.
  • Policy Manager (PM): A primary policy decision point for network policies, deciding the ways that the underlying network supports applications on behalf of subscribers and visitors to the network.
  • Application Manager (AM): The SIP services platform in the network that authorizes access to SIP services, provides SIP registration and authentication functions, and is responsible for the invocation and management of SIP-based features.
  • Security Manager (SM): Responsible for monitoring the network for security threats and responding to them in real time, making decisions on what devices are allowed access to the network based on their posture - a measure of the safety of the device based on the freshness of its software patches and security features.
  • Services Data Manager (SDM): The main repository of subscriber and network control data and collects and stores charging data for the network.
  • The documents will be available to industry leaders who send an email to

About Verizon Wireless

Verizon Wireless owns and operates the nation's most reliable wireless network, serving 54.8 million voice and data customers. Headquartered in Basking Ridge, NJ, Verizon Wireless is a joint venture of Verizon Communications (NYSE: VZ) and Vodafone (NYSE and LSE: VOD). Find more information on the Web at To preview and request broadcast-quality video footage and high-resolution stills of Verizon Wireless operations, log on to the Verizon Wireless Multimedia Library at

About Lucent Technologies

Lucent Technologies designs and delivers the systems, services and software that drive next-generation communications networks. Backed by Bell Labs research and development, Lucent uses its strengths in mobility, optical, software, data and voice networking technologies, as well as services, to create new revenue generating opportunities for its customers, while enabling them to quickly deploy and better manage their networks. Lucent's customer base includes communications service providers, governments and enterprises worldwide. For more information on Lucent Technologies, which has headquarters in Murray Hill, N.J., USA, visit

About Motorola

Motorola is known around the world for innovation and leadership in wireless and broadband communications. Inspired by our vision of Seamless Mobility, the people of Motorola are committed to helping you get and stay connected simply and seamlessly to the people, information, and entertainment that you want and need. We do this by designing and delivering "must have" products, "must do" experiences and powerful networks -- along with a full complement of support services. A Fortune 100 company with global presence and impact, Motorola had sales of US $36.8 billion in 2005. For more information about our company, our people and our innovations, please visit

About Nortel

Nortel is a recognized leader in delivering communications capabilities that enhance the human experience, ignite and power global commerce, and secure and protect the world's most critical information. Our next-generation technologies, for both service providers and enterprises, span access and core networks, support multimedia and business-critical applications, and help eliminate today's barriers to efficiency, speed and performance by simplifying networks and connecting people with information. Nortel does business in more than 150 countries. For more information, visit Nortel on the Web at For the latest Nortel news, visit

About Qualcomm

QUALCOMM Incorporated ( is a leader in developing and delivering innovative digital wireless communications products and services based on CDMA and other advanced technologies. Headquartered in San Diego, Calif., QUALCOMM is included in the S&P 500 Index and is a 2006 FORTUNE 500® company traded on The Nasdaq Stock Market® under the ticker symbol QCOM.