Gateway device, system, and communication method
A gateway device includes a communication unit communicating a frame signal conforming to an IuUP (Iu User Plane) protocol with a wireless base station controller connected to a circuit switching network; a determination unit determining whether the frame signal received by the communication unit satisfies a predetermined condition or not; a conversion unit converting information included in the frame signal to information to be set in a flow control signal of an IMS (IP Multimedia Subsystem) when the frame signal satisfies the predetermined condition; and a flow control signal transmission unit transmitting the flow control signal to a communication device in the IMS.
1. A method of a gateway comprising:
receiving a frame signal conforming to an lu User Plane (IuUP) protocol;
extracting PDU type information from the received frame signal;
extracting procedure indicator information from the received frame signal;
determining the PDU type of the received frame signal;
determining a value of the procedure indicator information of the received frame signal;
if the PDU is determined to be a certain type and the procedure indicator information is determined to be a certain value, then converting the protocol type from the received frame signal conforming to the IuUP protocol to a flow control signal conforming to a Real-time Transport Protocol Control Protocol (RTCP) for an IP Multimedia Subsystem (IMS); and
transmitting the flow control signal.
2. The method according to claim 1 , wherein the gateway is a Media Gateway (MGW).
3. The method according to claim 1 , wherein the frame signal is a rate control request.
4. The method according to claim 1 , wherein the flow control signal applies a Real-time Transport Protocol (RTP) Control Protocol-Application (RTCP-APP) packet.
5. The method according to claim 1 , wherein the flow control signal includes Code Mode Request (CMR).
6. The method of a gateway according to claim 1 , wherein said converting between the frame signal conforming to the IuUP protocol and the flow control signal conforming to the RTCP for the IMS is performed by using a number of Radio Access Bearer (RAB) sub-flows.
7. The method of a gateway according to claim 1 , wherein said converting between the frame signal conforming to the IuUP protocol and the flow control signal conforming to the RTCP for the IMS is performed by using a length of each of Radio Access Bearer (RAB) sub-flows in a first RAB Sub-Flow Combination Indicator (RFCI).
8. The method of a gateway according to claim 1 , wherein said converting between the frame signal conforming to the IuUP protocol and the flow control signal conforming to the RTCP for the IMS is performed by using a length of each of Radio Access Bearer (RAB) sub-flows in a second RAB Sub-Flow Combination Indicator (RFCI).
9. The method of a gateway according to claim 1 , wherein said converting between the frame signal conforming to the IuUP protocol and the flow control signal conforming to the RTCP for the IMS is performed by using a predetermined conversion table.
10. The method of a gateway according to claim 1 , wherein the determining the PDU type of the received frame signal, determines if the PDU type information is of a PDU type 0, type 1, or type 14.
11. The method of a gateway according to claim 10 ,
wherein said converting is performed only if the PDU type information is of a PDU type 14 and if the value of the procedure indicator information is equal to zero.
12. A gateway comprising:
a reception unit, implemented at least in hardware comprising a processor and memory, that receives a frame signal conforming to an lu User Plane (IuUP) protocol;
a transmission unit, implemented at least in the hardware, that transmits a flow control signal;
a determination unit which extracts PDU type information and procedure indicator information from the received frame signal; wherein said determination unit being configured to determine the type of PDU and a value of the procedure indicator information received from the frame signal; and
a conversion unit, implemented at least in the hardware, that converts, if the PDU is determined to be a certain type and the procedure indicator information is determined to be a certain value, the protocol type from the received frame signal conforming to the IuUP protocol to the flow control signal conforming to a Real-time Transport Protocol Control Protocol (RTCP) for an IP Multimedia Subsystem (IMS).
13. The gateway according to claim 12 , wherein the gateway is a Media Gateway (MGW).
14. The gateway according to claim 12 , wherein the frame signal is a rate control request.
15. The gateway according to claim 12 , wherein the flow control signal applies a Real-time Transport Protocol (RTP) Control Protocol-Application (RTCP-APP) packet.
16. The gateway according to claim 12 , wherein the flow control signal includes Codec Mode Request (CMR).