Question: How often should the sender include the Overload Control Information (OCI) IE towards a receiver?
Option 1: The sender should always include the OCI IE in every message towards the receiver.
Option 2: The sender may include the OCI IE only when the new/changed value has not already been provided to the given receiver, or periodically, or in a subset of messages.
Option 3: The sender should never include the OCI IE in any message towards the receiver.
Option 4: The sender should include the OCI IE only once, during the initial setup.
Explanation: According to the specification, the frequency of inclusion of Overload Control Information (OCI) is implementation specific. However, it does provide some potential approaches that the sender may implement, such as including the OCI IE only when the new/changed value has not already been provided to the given receiver, or periodically, or in a subset of messages. This allows for flexibility and efficiency in propagating the overload control information while ensuring effective overload control protection.