Patent ID: 7831725

Claim:
A method for a digital broadcast receiver to process a request and response communication, the method comprising: sending to a cable card a new flow request APDU (Application Protocol Data Unit) comprising a service type field defining a type of requested service and a data of the requested service, wherein the data of the requested service is a PID (Packet IDentifier) when the service type field is a first value indicating an MPEG (Moving Picture Experts Group) service type is requested, wherein the data of the requested service is a Media Access Control (MAC) address when the service type field is a second value indicating an Internet Protocol (IP) Unicast service type is requested, and wherein the data of the requested service is a Multicast Group ID when the service type field is a third value indicating an IP Multicast service type is requested, the new flow request APDU includes at least one requested service type; receiving from the cable card a new flow request confirmation APDU that is comprised of the service type field defined in the new flow request APDU and multiple conditional loops for corresponding to the multiple types of requested services that can be indicated in the service type field and a status field located in a position other than within the multiple conditional loops, wherein the status field is a first status field value when the new flow request APDU is granted and a second status field value when the new flow request APDU is denied, and executing the conditional loop that corresponds to the requested service indicated by the service type field when the status field is a first status field value.