Method, Apparatus, and Media Gateway for Codec Rate Adjustment

• US 20140106729A1
• Filed: 12/03/2013
• Published: 04/17/2014
• Est. Priority Date: 06/03/2011
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Zou, Chao
• Granted Patent: US 9,288,662 B2
• Time in Patent Office: Days
• US Class Current: 455/418
• CPC Class Codes: G10L 19/24 Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
• CPC Class Codes: H04L 65/103 in the network
• CPC Class Codes: H04L 65/1043 Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities
• CPC Class Codes: H04W 8/22 Processing or transfer of terminal data, e.g. status or physical capabilities

Abstract

The present invention discloses a method for codec rate adjustment. A media gateway (MGW) determines whether an initial codec rate of a first interface is consistent with an initial codec rate of a second interface or an initial codec rate of a third interface, where the first interface is an A interface, the second interface is an Nb interface, and the third interface is an lu interface; when determining that the initial codec rate of the first interface is inconsistent with the initial codec rate of the second interface or the initial codec rate of the third interface, the MGW adjusts the initial codec rate of the second interface or the initial codec rate of the third interface to the initial codec rate of the first interface. Therefore, quick and convenient codec rate adjustment can be implemented and voice service quality can be improved.

Claims

1. A method for codec rate adjustment, comprising:

determining, by a media gateway (MGW), whether an initial codec rate of a first interface is consistent with either an initial codec rate of a second interface or an initial codec rate of a third interface, wherein the first interface is an A interface between a base station subsystem (BSS) and the MGW, the second interface is an Nb interface between the MGW and a peer MGW, and the third interface is an Iu interface between a radio network subsystem (RNS) and the MGW;

adjusting, by the MGW, either the initial codec rate of the second interface or the initial codec rate of the third interface to the initial codec rate of the first interface when the initial codec rate of the first interface is inconsistent with either the initial codec rate of the second interface or the initial codec rate of the third interface.

2. The method for codec rate adjustment according to claim 1 further comprising receiving, by the MGW, a packet through the first interface prior to determining whether an initial codec rate of a first interface is consistent with either an initial codec rate of a second interface or an initial codec rate of a third interface.

3. The method for codec rate adjustment according to claim 1, wherein the initial codec rate of the first interface, the initial codec rate of the second interface, or the initial codec rate of the third interface comprises a codec rate based on either adaptive multi-rate codec (AMR) or adaptive multi-rate wideband codec (AMR-WB).

4. The method for codec rate adjustment according to claim 1, wherein before determining whether the initial codec rate of the first interface is consistent with the initial codec rate of the second interface, the method further comprising initiating, by the MGW, an Nb UP initialization operation based on a rate set of the first interface to negotiate a rate set of the second interface and the initial codec rate of the second interface.

5. The method for codec rate adjustment according to claim 4, wherein when the rate set of the first interface is compatible with the rate set of the second interface, transcoder free operation (TrFO) is implemented on the MGW.

6. The method for codec rate adjustment according to claim 1, wherein before determining whether the initial codec rate of the first interface is consistent with the initial codec rate of the third interface, the method further comprising initiating, by the MGW, an Iu UP initialization operation based on a rate set of the first interface to negotiate a rate set of the third interface and the initial codec rate of the third interface.

7. The method for codec rate adjustment according to claim 6, wherein when the rate set of the first interface is compatible with the rate set of the third interface, TrFO is implemented on the MGW.

8. 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 either an initial codec rate of a second interface or an initial codec rate of a third interface, wherein the first interface is an A interface between a base station subsystem (BSS) and a media gateway (MGW), the second interface is an Nb interface between the MGW and a peer MGW, and the third interface is an Iu interface between a radio network subsystem (RNS) and the MGW;

an adjusting unit configured to adjust either the initial codec rate of the second interface or the initial codec rate of the third interface to the initial codec rate of the first interface when the determining unit determines that the initial codec rate of the first interface is inconsistent with either the initial codec rate of the second interface or the initial codec rate of the third interface.

9. The apparatus for codec rate adjustment according to claim 8, further comprising a receiving unit configured to receive a packet through the first interface, wherein after the receiving unit receives the packet, the determining unit determines whether the initial codec rate of the first interface is consistent with either the initial codec rate of the second interface or the initial codec rate of the third interface.

10. The apparatus for codec rate adjustment according to claim 8, wherein the initial codec rate of the first interface, the initial codec rate of the second interface, or the initial codec rate of the third interface comprises a codec rate based on adaptive multi-rate codec (AMR) or adaptive multi-rate wideband codec (AMR-WB).

11. 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 either an initial codec rate of a second interface or an initial codec rate of a third interface, wherein the first interface is an A interface between a base station subsystem (BSS) and the MGW, the second interface is an Nb interface between the MGW and a peer MGW, and the third interface is an Iu interface between a radio network subsystem (RNS) and the MGW;

adjust either the initial codec rate of the second interface or the initial codec rate of the third interface to the initial codec rate of the first interface when the initial codec rate of the first interface is inconsistent with either the initial codec rate of the second interface or the initial codec rate of the third interface.

12. The MGW according to claim 11, wherein the processor is further configured to receive a packet through the first interface before determining whether an initial codec rate of a first interface is consistent with either an initial codec rate of a second interface or an initial codec rate of a third interface.

13. The MGW according to claim 11, wherein the initial codec rate of the first interface, the initial codec rate of the second interface, or the initial codec rate of the third interface comprises a codec rate based on adaptive multi-rate codec (AMR) or adaptive multi-rate wideband codec (AMR-WB).

14. The MGW according to claim 11, wherein the processor is further configured to initiate an Nb UP initialization operation based on a rate set of the first interface to negotiate a rate set of the second interface and the initial codec rate of the second interface before determining whether the initial codec rate of the first interface is consistent with the initial codec rate of the second interface.

15. The MGW according to claim 14, wherein when the rate set of the first interface is compatible with the rate set of the second interface, transcoder free operation (TrFO) is implemented on the MGW.

16. The MGW according to claim 11, wherein the processor is further configured to initiate an Iu UP initialization operation based on a rate set of the first interface to negotiate a rate set of the third interface and the initial codec rate of the third interface before the determining whether the initial codec rate of the first interface is consistent with the initial codec rate of the third interface.

17. The MGW according to claim 16, wherein when the rate set of the first interface is compatible with the rate set of the third interface, TrFO is implemented on the MGW.