Determining dropped call rates in IP multimedia networks

US10609211B2 · kind B2 · utility

Assignee

• T-Mobile USA, Inc. · US

Inventors

• Dawn Donnenwirth · Bellevue, US
• Le Roy Munar · Snoqualmie, US
• Ting Zhang · Yantai, CN
• Baquer Ali Chabuk Savar · Bellevue, US
• Muhammad Tawhidur Rahman · Bellevue, US

Key dates

• Filing date: Mar 17, 2017
• Grant date: Mar 31, 2020
• Expiry date: Mar 17, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04M2215/0188
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

Systems and methods are described herein for determining dropped call rates (DCR) for various communications networks, such as IP Multimedia Networks (IMS), which include Voice over LTE (VoLTE) networks. For example, the systems and methods utilize data (e.g. abnormal cause codes) generated by layers of the IMS networks, such as a Session Initiation Protocol (SIP) layer of the IMS network, when determining dropped call rates for IMS networks.