Question: In a dedicated APN for UE-to-Network Relay connectivity using IPv6 prefix delegation, what parameter(s) does the PCRF use for session binding?
Option 1: UE IPv4 address and/or IPv6 network prefix, plus UE identity
Option 2: UE identity (of the same kind), if present, and information about the PDN
Option 3: Both UE IPv4 address and UE identity, excluding IPv6 network prefix
Option 4: Only the IPv6 network prefix (specifically for dedicated APN with IPv6 prefix delegation shorter than 64)
Explanation: According to specifications for UE-to-Network Relay connectivity using IPv6 prefix delegation (where the assigned IPv6 network prefix is shorter than 64), the PCRF performs session binding based solely on the IPv6 network prefix, emphasizing prefix matching in this context for efficient policy and charging control.