Method, apparatus, and media gateway for codec rate adjustment

An apparatus for codec rate adjustment, comprising:

• a determining unit configured to:
• determine whether an initial codec rate of a first interface is consistent with an initial codec rate of a second interface when the apparatus comprises the first interface and the second interface, wherein the first interface is an A interface between a base station subsystem (BSS) and a media gateway (MGW), and wherein the second interface is an Nb interface between the MGW and a peer MGW;
• and
• determine whether the initial codec rate of the first interface is consistent with an initial codec rate of a third interface when the apparatus comprises the first interface and the second interface, wherein the third interface is an IU interface between a radio network subsystem (RNS) and the MGW;
• and
• an adjusting unit configured to:
• adjust the initial codec rate of the second interface to the initial codec rate of the first interface, without adjusting the initial codec rate of the first interface, when the apparatus comprises the first interface and the second interface and the determining unit determines that the initial codec rate of the first interface is inconsistent with the initial codec rate of the second interface;
• and
• adjust the initial codec rate of the third interface to the initial codec rate of the first interface, without adjusting the initial codec rate of the first interface, when the apparatus comprises the first interface and the third interface and the determining unit determines that the initial codec rate of the first interface is inconsistent with the initial codec rate of the second interface.

A media gateway (MGW), comprising:

• a processor;
• and
• a memory coupled to the processor, wherein the processor is configured to:
• determine whether an initial codec rate of a first interface is consistent with an initial codec rate of a second interface when the MGW further comprises the first interface and the second interface, wherein the first interface is an A interface between a base station subsystem (BSS) and the MGW, and wherein the second interface is an Nb interface between the MGW and a peer MGW;
• determine whether the initial codec rate of the first interface is consistent with an initial codec rate of a third interface when the MGW further comprises the first interface and the third interface, wherein the third interface is an IU interface between a radio network subsystem (RNS) and the MGW;
• adjust the initial codec rate of the second interface to the initial codec rate of the first interface, without adjusting the initial codec rate of the first interface, when the MGW further comprises the first interface and the second interface and the initial codec rate of the first interface is inconsistent with the initial codec rate of the second interface;
• and
• adjust the initial codec rate of the third interface to the initial codec rate of the first interface, without adjusting the initial codec rate of the first interface, when the MGW further comprises the first interface and the third interface and the initial codec rate of the first interface is inconsistent with the initial codec rate of the third interface.