WO2010017758A1

WO2010017758A1 - Signal gain control method, communication system, media gateway and media gateway controller

Info

Publication number: WO2010017758A1
Application number: PCT/CN2009/073169
Authority: WO
Inventors: 林扬波
Original assignee: 华为技术有限公司
Priority date: 2008-08-14
Filing date: 2009-08-10
Publication date: 2010-02-18
Also published as: CN101651663A

Abstract

An embodiment of the present invention discloses a signal gain control method, a communication system, a media gateway (MG) and a media gateway controller (MGC). The MG receives the control information for adjusting the signal gain based on the direct setting mode or the incremental mode relative to the current value from the MGC. The MG performs the gain adjustment on the corresponding signal to be adjusted according to the control information. The MGC sends the control information to the MG via the extended (media) gateway control protocol to implement the gain adjustment.

Description

Signal gain control method, communication system, media gateway and media gateway controller. The application is filed on August 14, 2008, and the application number is 200810142465.5. The invention name is "recording signal gain control method, system, media gateway and its controller". Priority of prior application. Technical field

The present invention relates to the field of mobile communications, and in particular to the technique of gain control of a (media) gateway control protocol. Background technique

As shown in Figure 1: Media Gateway Controller (MGC) and Media Gateway (MG) are two key components of a packet network under a business and bearer separation architecture. The MGC is responsible for the service control function. The MG is responsible for the media bearer function, thereby separating the service control plane and the media bearer plane, thereby fully sharing network resources, simplifying equipment upgrades and service expansion, and reducing development and maintenance costs.

(Media) The gateway control protocol is the main protocol for communication between the MG and the MGC. Currently, there are two widely used H.248/MeGaCo (Gateway Control Protocol) and MGCP (Media Gateway Control Protocol) protocols, and H.248/ MeGaCo is based on the development of MGCP. Among them, MGCP version 1 was developed by the IETF in October 1999 and revised in January 2003. H.248/MeGaCo version 1 was jointly developed by the ITU and the IETF in November 2000 and revised in June 2003, H.248 Version 2 was developed by the ITU in May 2002 and revised in March 2004. H.248 version 3 was developed by the ITU in September 2005 and revised in May 2008.

According to the definition of H.248, the signal (Signal) is used by the MGC to instruct the MG to perform certain resource operations, such as playback. The signal is executed at the Termination or Stream level, and execution on the terminal indicates that all streams on the terminal are applicable at the same time. A list of signals can be used to represent a series of operations that need to be performed in sequence, with gaps between operations. MGC The signal and/or signal list is included in the signal descriptor for delivery to the MG. The list of signals and/or signals in the signal descriptors issued at the same time is synchronized.

The execution of the signal may be based on a certain gain. There is a need to adjust its gain in the application, but there is no gain adjustment mechanism in the prior art, so the MG cannot adjust the gain.

Summary of the invention

Embodiments of the present invention provide a method for implementing gain adjustment by extending a (media) gateway control protocol, a system, a media gateway, and a controller thereof, to implement MG adjustment gain.

A signal gain control method includes the following steps: The media gateway receives control information from a media gateway controller that adjusts a gain of a signal based on a direct setting manner or a relative current value increment manner; the media gateway according to the control information pair The corresponding signal is used for gain adjustment.

A media gateway, comprising: a receiving unit, configured to receive, from a media gateway controller, control information for adjusting a gain of a signal based on a direct setting manner or a relative current value increment manner; and an adjusting unit, corresponding to the control information The signal is adjusted for gain.

A communication system, comprising: a media gateway controller, configured to send, to a media gateway, control information that adjusts a gain of a signal based on a direct setting manner or a relative current value increment manner. The media gateway is configured to receive the control information, and perform gain adjustment on the corresponding signal according to the control information.

A media gateway controller, comprising: a sending module, configured to send, to the media gateway, control information for adjusting a gain of a signal according to a direct setting manner or a relative current value increment manner, where the control information is used to control a media gateway Gain adjustment is performed on the corresponding signal.

According to the foregoing technical solution, by extending the extended (media) gateway control protocol, the media gateway receives control information from the media gateway controller that adjusts the gain of the signal based on a direct setting manner or a relative current value increment manner; the media gateway is configured according to The control information adjusts the gain of the corresponding signal, so that the media gateway can adjust the gain of the signal according to the direct setting mode or the current incremental mode. DRAWINGS

1 is a schematic diagram of networking of an MG and an MGC used in an embodiment of the present invention;

2 is a flow chart of an embodiment of a gain adjustment method of the present invention;

FIG. 3 is a schematic structural diagram of a system according to an embodiment of the present invention. detailed description

As shown in FIG. 1 , it is a networking diagram of a media gateway controller MGC and a media gateway MG in a service and bearer separation architecture according to an embodiment of the present invention.

(Media) The gateway control protocol is the main protocol for communication between the MG and the MGC. Currently, there are two widely used H.248/MeGaCo (Gateway Control Protocol) and MGCP (Media Gateway Control Protocol) protocols, and H.248/ MeGaCo is based on the development of MGCP.

Taking H.248 as an example, various resources on the MG are abstractly represented as terminals (Termination). The terminal is further divided into physical terminals and temporary (Ephemeral) terminals. The former represents some semi-permanent physical entities, such as TDM time slots, etc., and the latter represents public resources released after temporary applications, such as RTP flows. . The MG as a whole is represented by a special terminal called a root terminal. The association between terminals is abstracted as a context. The context can contain multiple terminals, thus describing the interrelationships between the terminals in terms of topology. For a terminal that has not been associated with another terminal, it is included by a special context called a Null context.

Based on the above abstract connection model, the interaction between the business and the bearer is actually reflected

Termination and Context operations. This operation is done through the request (Request) and response (Reply) of the command between the MGC and the MG. Command types include Add, Modify, Subtract, Move, AuditValue, AuditCapabilities, Notify, and ServiceChange. Command parameters, also known as descriptors, are classified as Property, Signal, Event, Statistic, etc. In order to facilitate the logical aggregation of parameters into packages based on business relevance.

The MGC's control of the MG can be directed to the flow on the terminal or terminal. The terminal state ( TerminationState ) descriptor is used to include non-stream specific features on the terminal, such as service state (ServiceState ), event buffer control ( EventBufferControl ), and so on. A feature specific to the terminal upstream is included by a Media descriptor, which may contain a number of Stream descriptors. Each stream descriptor is for a single stream and contains local control (LocalControl), local (Local) and remote (Remote) descriptors. The local control descriptor is used to include flow-related control information such as mode (Mode), reserved group (ReservedGroup), and reserved value (ReserveValue). The local and remote descriptors are respectively used to include features of the stream received by the local end and the remote end, such as an address and a port, a codec algorithm, and the like, and the description form of the SDP is specifically adopted.

As shown in FIG. 2, the method for adjusting a gain according to an embodiment of the present invention includes the following steps.

101. The media gateway receives, from the media gateway controller, control information that adjusts a gain of the signal based on a direct setting manner or a relative current incremental manner.

102. The media gateway performs gain adjustment on the corresponding signal according to the control information.

Embodiment 1 of the embodiment of the present invention:

By extending the (media) gateway control protocol, adding a parameter to a specific signal (such as Play, Play Collect, PlayRecord, etc.) indicates that the gain of the specific signal is adjusted, and the parameter is named as a gain adjustment parameter. When the MGC needs to indicate to the MG to adjust the gain of the specific signal, here we take the Play signal as an example, that is, the MGC needs to indicate to the MG to adjust the gain of the Play signal, and the MGC sends the Play signal and its gain adjustment parameter to the MG, and the MG The Play signal and its gain adjustment parameters adjust the gain of the Play signal on the MG. The gain adjustment parameter may specifically be: 1. Gain Delta (identified as gd) parameter, whose value represents the increment of the signal to be adjusted relative to the current gain, that is, the gain is adjusted relative to the current value increment. This parameter can be an integer (Integer) type in decibel or as a percentage.

The meaning of the value is: Take a positive value to represent the decibel or percentage relative to the current gain; take a negative value to represent the decibel or percentage relative to the current gain; take 0 to be relative to the current gain. The default is 0.

For example: The current gain is 200 dB, if the parameter gd=50 dB or 25%, the adjustment gain is 250 dB; if the parameter gd=-50 dB or -25%, the adjustment gain is 150 dB; if the parameter rd=0 dB Or 0%, the adjustment gain is still 200 decibels.

2. Absolute Gain (marked as ag) parameter, whose value represents the absolute value of the signal to be adjusted, that is, the gain is adjusted based on the direct setting mode. This parameter can be an integer (Integer) type in decibel.

For example: ag=250, the adjustment gain is 250 decibels; if the parameter ag=100 decibels, the adjustment gain is 100 decibels.

Embodiment 2 of the embodiment of the present invention:

By extending the (media) gateway control protocol, a signal is added to indicate the gain of the particular signal, which is named Gain Adjustment Information (gai). The signal further includes the following parameters:

(1) The adjustment object can be a signal identifier (signal Identifier, identifier si), a signal list identifier (Signal List Identifier, identifier sli), a media resource identifier (Media)

Resource Identifier, identified as mri) or any combination of these. These parameters can be of type String.

(2) The adjustment information can be represented by a parameter. The parameter is named as the gain adjustment parameter. 1. Gain Delta (identified as gd) parameter, whose value represents the increment of the signal to be adjusted relative to the current gain, that is, the gain is adjusted relative to the current value increment. This parameter can be an integer (Integer) type in decibel or as a percentage.

2. Absolute Gain (marked as ag) parameter, whose value represents the absolute value of the signal to be adjusted, that is, the gain is adjusted based on the direct setting mode. This parameter can be an integer

(Integer) type, in decibel.

When the MGC needs to indicate to the MG to adjust the gain of the specific signal, the signal list, or the media resource, the MGC may send the above gai signal to the MG, and set the parameters si, sli, and/or mri of the signal to the corresponding signal identifier and signal list. The identifier or the media resource identifier, and the parameter gd of the signal is set to be an increment of the gain to be adjusted relative to the current gain, or the parameter ag of the signal is set to be an absolute value of the gain to be adjusted. After the MG obtains the signal and its parameters, it applies the adjusted gain to the corresponding signal, signal list, or media resource.

For example, the current gain of the signal play is 200 decibels. If the MGC sends the signal gai and its parameter si= "play", gd=50 decibels or 25%, the adjustment gain of the play signal is 250 decibels; if the MGC When the signal gai is sent and its parameter si="play", delta=-50 dB or -25%, the adjustment gain of the MG to the play signal is 150 decibels; if the MGC sends the signal gai and its parameter si="play", Gd=0, the adjustment gain of the bel MG to the play signal is still 200 decibels; if the MGC sends the signal gai and its parameter si="play", ag=100 decibels, the adjustment gain of the MG to the play signal is 100 decibels.

As shown in FIG. 3, a schematic structural diagram of a system according to an embodiment of the present invention includes: a media gateway 21, and a media gateway controller 22. The media gateway 21 may further include: a receiving unit 211, a calculating unit 212, and an adjusting unit 213. The media gateway controller 22 sends control information for adjusting the gain of the signal based on the direct setting mode or the current value increment mode to the receiving unit 211 of the media gateway 21; the adjusting unit 213, according to the control information received by the receiving unit 211 Gain adjustment is performed on the corresponding signal.

(1), when the control information is adjusted based on the current value increment manner, the adjustment manner is specifically: the calculating unit 212 calculates the to-be-adjusted gain according to the control information and the current gain of the signal. The adjusting unit 213 adjusts the gain of the corresponding signal according to the generation adjustment gain calculated by the calculating unit 212.

(2) When the gain of the signal is adjusted based on the direct setting mode, the adjustment mode is specifically: the adjusting unit 213 directly adjusts the gain of the signal to the to-be-adjusted gain, and the computing unit is not required in the media gateway 21. 212.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer. A hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

Claim

A signal gain control method, characterized in that the method comprises the following steps: The media gateway receives control information from the media gateway controller that adjusts the gain of the signal based on a direct setting manner or a relative current value increment manner;

The media gateway performs gain adjustment on the signal according to the control information.

2. The method according to claim 1, wherein when the control information is adjusted based on a relative current value increment manner, the control information is a gain increment parameter, indicating a gain to be adjusted. An increment of the current gain relative to the signal;

The media gateway calculates the gain to be adjusted based on the control information and the current gain of the signal, and then adjusts the gain of the signal to the gain to be adjusted.

3. The method of claim 2, wherein the positive value of the increment represents a decibel or a percentage that is increased relative to the current gain;

Or the negative value of the increment represents a decibel or percentage that is reduced relative to the current gain.

4. The method of claim 3, wherein the increment of 0 indicates that the gain is constant with respect to the current.

5. The method according to claim 1, wherein when the gain of the signal is adjusted based on a direct setting manner, the control information is an absolute gain parameter indicating a gain to be adjusted; and the media gateway increases the gain of the signal. Adjusted to the gain to be adjusted.

6. The method according to claim 5, wherein the unit of the gain to be adjusted is a decibel.

The method according to any one of claims 1 to 6, wherein the media gateway receives the control information from the media gateway controller as follows:

The media gateway receives a first signal from the media gateway controller that carries the control information, and the first signal is a corresponding signal that needs to be adjusted in gain.

The method according to any one of claims 1 to 6, wherein the media gateway receives The control information from the media gateway controller is specifically:

The media gateway receives a second signal from the media gateway controller that carries the control information, and the second signal is used to indicate a signal corresponding to the need for gain adjustment.

The method according to claim 8, wherein the signal used to indicate that the corresponding need for gain adjustment is specifically

The second signal further includes at least one or any combination of a signal identifier, a signal list identifier, and a media resource identification parameter to indicate the signal corresponding to the adjustment.

A media gateway, wherein the media gateway includes:

a receiving unit, configured to receive, from the media gateway controller, control information that adjusts a gain of the signal based on a direct setting manner or a relative current incremental manner;

The adjusting unit performs gain adjustment on the corresponding signal according to the control information.

The media gateway according to claim 10, wherein when the control information is adjusted based on a current value increment manner, the method further includes:

a calculating unit, configured to calculate a to-be-adjusted gain according to the control information and a current gain of the signal;

Then, the adjusting unit adjusts the gain of the corresponding signal according to the to-be-adjusted gain calculated by the calculating unit.

12. A communication system, wherein the communication system comprises:

a media gateway controller, configured to send, to the media gateway, control information that adjusts a gain of the signal based on a direct setting manner or a current value increment manner;

And a media gateway, configured to receive the control information, and perform gain adjustment on the corresponding signal according to the control information.

13. The system according to claim 12, wherein when the control information is adjusted based on a current value increment manner, the gain of the signal is adjusted,

The media gateway is specifically configured to calculate a to-be-adjusted gain according to the control information and a current gain of the signal; and adjust a gain of the corresponding signal according to the calculated generation adjustment gain.

14. A media gateway controller, comprising:

And a sending module, configured to send, to the media gateway, control information for adjusting a gain of the signal based on a direct setting manner or a relative current value increasing manner, where the control information is used to control the media gateway to perform gain adjustment on the corresponding signal.