Page 403 - 5G Basics - Core Network Aspects

Core network aspects 1

7.2.3 Instant message functional entity (IM-FE)

The IM-FE is responsible for handling the file transfer, content sharing, one-to-one chat and group chat
services. It supports functions of IM service access permission, content filtering and billing information
generation.

7.2.4 Multimedia telephony functional entity (MT-FE)
The MT-FE supports multimedia conversational communication between two or more end-points. It includes
conversational voice and video services.

8 Specific capabilities of multi-connection to support eMMTel
Specific capabilities of the multi-connection functional entities are required to support eMMTel services;
these are explained in the following clauses.

8.1 Requirement for MAS-F

The following requirements are required for the MAS-F to support eMMTel:
1) Access to the network, registration, AAA functionality, etc.
2) Utilize different multi-connection functionality; e.g., bandwidth convergence, low time delay, high
security, efficient utilization of network resources, load balancing, reliability of connection and
continuity of services.

3) Provide service composition and service decomposition based on the subscriber's profile and/or on
available network capabilities.
4) Interact with the legacy MMTel applications.

5) Provide open interfaces for eMMTel applications to use the capabilities and access resources of
multi-connection.

8.2 Requirement for SCF

The following requirements are required for the SCF to support eMMTel:
1) Receive and process eMMTel service control messages.
2) Monitor access against unauthorized use of eMMTel service.
3) Provide eMMTel service information to the MPC-FE.

4) Send and authorize the QoS resource request to the MPC-FE.
5) Communicate policies for the UE to the multi-connection network.

8.3 Requirement for MCF

8.3.1 MC-FE
The following requirements are required for the MC-FE to support eMMTel:
1) Collect and maintain access network information, such as physical layer parameters, including
available bandwidth, radio strength status, etc.
2) Coordinate the multiple policy entities present in the network.
3) Make and update the specific load and/or QoS policy for each access network.
4) Optionally, further provide the security coordination function information to coordinate each and
all involved accesses.
5) Optionally, report abnormal status of the access network to the MR-FE.

8.3.2 MPC-FE
The following requirements are required for the MPC-FE to support eMMTel:

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