公开(公告)号：US20180013880A1

公开(公告)日：2018-01-11

申请号：US15548831

申请日：2015-02-04

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Nagaraja RAO ,  Derek UNDERWOOD ,  Wolfgang BUECKER

IPC: H04M3/22 ,  H04L29/06 ,  H04M1/253

CPC classification number: H04M3/2281 ,  H04L63/0281 ,  H04L63/061 ,  H04L63/166 ,  H04L63/306 ,  H04L65/00 ,  H04L65/10 ,  H04L65/1046 ,  H04M1/2535 ,  H04M7/0072

Abstract: Certain embodiments of the invention generally relate to lawful interception of communications for IP Multimedia System-based (IMS-based) voice over IP (VoIP). For example, some embodiments relate to interception of communications including interception for encrypted, transcoded media. A method may include identifying a network node that provides call content interception. The method may also include determining a codec type used at a location of the call content interception at the network node. The method may further include sending a matched codec of the codec type used at the location of the call content interception at the network node to a delivery function in the communications network.

公开(公告)号：US20220394064A1

公开(公告)日：2022-12-08

申请号：US17641846

申请日：2019-09-24

Applicant: Nokia Solutions and Networks Oy

Inventor： Xu CHEN ,  Maridi MAKARAJU ,  Derek UNDERWOOD

IPC: H04L65/1023 ,  H04L65/1016 ,  H04L61/2503 ,  H04L65/1104

Abstract: An apparatus includes a transceiver to support a media flow involving a user equipment and an Internet Protocol (IP) Multimedia Subsystem (IMS) network that are connected via a media path that traverses a first realm associated with the user equipment, a second realm, and a third realm associated with the IMS network. In some cases, the apparatus includes a processor to establish a first context to perform interworking between the first realm and the second realm in response to an offer message from the user equipment. The processor later de-allocates the first context in response to receiving an answer message indicating that a second context performs interworking between the first realm and the third realm. In other cases, the processor bypasses allocation of a context to perform interworking between the second realm and the third realm in response to an indication that the media flow is anchored on an incoming side.

公开(公告)号：US20190289080A1

公开(公告)日：2019-09-19

申请号：US16317139

申请日：2017-07-11

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Nagaraja RAO ,  Curt WONG ,  Derek UNDERWOOD

IPC: H04L29/08 ,  H04L29/06 ,  H04L12/26

Abstract: Systems, methods, and apparatuses for correlating intercept related information (IRI) with call content (CC) for S8HR lawful interception are provided. The method may include generating at a network entity a correlation identifier. The method may also include adding the correlation identifier to a session initiation protocol message. In addition, the method may include delivering the session initiation protocol message including the correlation identifier from the network entity to another network entity.