Ovum: Verizon Wireless' A-IMS initiative: focus on service continuity

Jean-Charles Doineau, Roger Entner and XJ Wang at Ovum write that Verizon Wireless, "along with its vendor ecosystem partners Cisco (CSCO), Lucent (LU), Motorola (MOT), Nortel (NT) and Qualcomm (QCOM), made an announcement about its IMS initiative, called Advances to IP Multimedia Subsystem (A-IMS). This initiative is emblematic of the current development of the IMS infrastructure business: pick up the good in IMS, and expand in areas not standardised."

Ovum notes that "Verizon Wireless is not the first tier 1 mobile operator in the US market to embrace IMS architecture: Sprint Nextel and Cingular made their announcements before Verizon Wireless. However, Verizon Wireless' approach clearly has more of a carriers' view on how the industry should implement the IMS architecture. A-IMS places emphasis not only on SIP-based applications but also on non-SIP-based applications."

Doineau, Entner and Wang provide an in-depth analysis of the announcement...