Question: In a Transparent end-to-end Packet-switched Streaming Service (PSS), who primarily controls transmission and content rate for bit-rate adaptation?
Option 1: Server, utilizing Client Reports (CP) and Server Reports (SP) for network state awareness
Option 2: User Equipment (UE), adjusting rates based on its own network conditions and feedback to the server
Option 3: Network Infrastructure (e.g., RAN), dynamically allocating resources to optimize streaming quality
Option 4: A combination of Server, UE, and Network Infrastructure in a collaborative adaptation process
Explanation: In PSS, bit-rate adaptation is server-centric. The server leads in controlling transmission and content rates by leveraging Client Reports (CP) and Server Reports (SP) for insights into client and network conditions, enabling effective link-rate adaptation.