M.4 Stream Switching
26.2343GPPProtocols and codecsRelease 17Transparent end-to-end Packet-switched Streaming Service (PSS)TS
M.4.1 Successful Stream Switch
M.4.2 Removal of Media Components from an ongoing session
Annex N (informative):
Recommendations for NAT traversal
This informative annex provides recommendations for NAT traversal schemes. Network address translators are frequently used functions even in mobile operator networks. Not all NATs provide an Application Layer Gateway (ALG) for RTSP services to open the desired UDP ports for incoming traffic. Thus, the PSS client may need to use other techniques to open the required UDP ports or setup a different transport for the streaming media.