WO2012142825A1

WO2012142825A1 - Method and device for reverse charging of multimedia stream

Info

Publication number: WO2012142825A1
Application number: PCT/CN2011/082054
Authority: WO
Inventors: 高扬
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-04-22
Filing date: 2011-11-10
Publication date: 2012-10-26
Also published as: CN102752121A

Abstract

Disclosed are a method and device for reverse charging of a multimedia stream, comprising: when two parties of a call are performing a media negotiation of the multimedia stream, configuring a reverse charging identifier in a signaling message for the reverse charging multimedia stream, and implementing via the signaling message a reverse charging negotiation of the multimedia stream. Also disclosed is a device for implementing the method for reverse charging of the multimedia stream. The present invention allows for reverse charging of the multimedia stream in a calling process, thus broadening the application of reverse charging. The present invention allows both the caller and the callee to simultaneously conduct a multimedia stream reverse charging negotiation when conducting the media negotiation, thereby allowing reverse charging of the multimedia stream, and thereby broadening the application of reverse charging, thus facilitating the multimedia stream reverse charging negotiation for both the caller and the callee.

Description

Inversion charging method and device for multimedia stream

The present invention relates to a reverse charging technology, and more particularly to an inverse charging method and apparatus for multimedia streaming based on media negotiation in an IP Multimedia Core Subsystem (IMS). Background technique

The 3rd Generation Partnership Project (3GPP, 3rd Generation Partner Project) defines the requirements for Reverse Charging in the IP Multimedia Core Subsystem (IMS) in 22.173, but there is no Make further standardized definitions at Stage2&Stage3.

Reverse charging is a common telecommunications service in traditional telecommunications networks based on circuit switching that allows a called terminal or service to pay for all or part of a call.

In the 1.256.3 standard of the International Telecommunication Union Telecommunication Standardization Sector (ITU-T), the reverse charging service in the Integrated Services Digital Network (ISDN) is defined. There are four cases:

Case A, the calling terminal having the capability of requesting the reverse charging service, for one call, requests the reverse charging service when the call is established, and the called terminal chooses to accept or refuse to bear the current call fee;

Case B, the calling terminal with the capability of requesting reverse charging service requests a reverse charging service during the call, that is, requests the reverse charging service of the remaining part of the call, and the called terminal chooses to accept or reject the call. The cost of the rest of the call; or the called terminal that has the capability to request the reverse charging service requests the reverse charging service during the call, that is, reverse charging the remaining part of the call; Case C, the called terminal requests the reverse charging of all current calls before the call is released;

Case D, the called terminal performs reverse charging for all calls that access itself without requiring the called terminal or the calling terminal to request.

In addition to the existing cases of reverse charging, when considering the multimedia stream in the field of IP multimedia streaming, it is necessary to perform reverse charging service for some of the multimedia streams, such as between the calling terminal and the called terminal. Audio (Audio) and video (Video) two multimedia streams, only want to reverse the video (Video) part of the billing, you need to have a fine reverse charging indicator for the multimedia stream in the multimedia stream and related rejection / Confirm the negotiation mechanism.

In practical applications, if the original call is an audio call, and the subsequent multimedia stream (such as a video stream) is introduced by the called terminal during the call, it is reasonable for the calling terminal to perform reverse charging for these subsequently introduced multimedia streams. .

Considering the scenario in which a new multimedia stream component is introduced in the media handover (initiated by the calling terminal or initiated by the called terminal), the calling terminal proposes a reverse charging request for the corresponding multimedia stream, and the called party responds to the corresponding multimedia stream. The reverse charging request of part or all of the multimedia stream is rejected, because the called terminal rejects the reverse charging of the corresponding multimedia stream. If the multimedia stream is used, the corresponding fee will be borne by the calling terminal, and the calling terminal A corresponding reverse charging request is proposed, which may cause unnecessary billing disputes. Summary of the invention

In view of the above, the main object of the present invention is to provide a method and apparatus for inverting charging of a multimedia stream, which can perform reverse billing negotiation on a corresponding multimedia stream when media negotiation is performed after the calling party and the called party establish a call. , thus expanding the scope of application of reverse billing.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A reverse charging method for a multimedia stream, comprising:

When the calling parties perform the media negotiation of the multimedia stream, the indentation charging identifier is set in the signaling message for the reversed charging multimedia stream, and the reverse charging negotiation of the multimedia stream is implemented. Preferably, before the identifier of the reverse charging is set in the signaling message, the method further includes:

The signaling message is extended, and a field indicating reverse charging is added.

Preferably, the adding a field indicating reverse charging is:

Adding a field carrying the request identifier of the reverse charging, and/or adding a field carrying an identifier that allows or denies the reverse charging request;

In the signaling message, the identifier of the reverse charging is set for the multimedia stream that performs reverse charging, and is:

In the field of the signaling message requesting for the reverse charging of the sending by the calling party, the request identifier of the reverse charging is added for the multimedia stream requesting the reverse charging, and/or the reverse is sent by the called party. In the field of the signaling message addition of the charging response, an identifier for allowing or rejecting reverse charging is added for the multimedia stream requesting reverse charging.

Preferably, the adding a field indicating reverse charging is:

Adding a field carrying the multimedia stream identifier as a request identifier for reverse charging, and/or adding a field for permitting or rejecting the identifier of the reverse charging request;

Adding the identifier of the multimedia stream of the requested reverse charging to the field of the signaling message addition requesting the reverse charging method sent by the calling party, and adding the signaling message of the reverse charging response sent by the called party In the field, an identifier for allowing or rejecting reverse charging is added to the identity of the multimedia stream for which the reverse charging is requested.

Preferably, the identifier of the multimedia stream includes sequence number information of the multimedia stream information line of the multimedia stream in the signaling message.

Preferably, the signaling message comprises a SIP message, or an SDP message.

Preferably, when the signaling message is a SIP message, the identifier of the reverse charging is carried in the SIP message. The newly extended message header is carried in a new extended field of the existing message header of the SIP message. When the signaling message is an SDP message, the extended SDP message attribute line is used as an identifier indicating reverse charging.

Preferably, the method further includes:

After the called party rejects the reversed billing multimedia stream requested by the calling party, the rejected multimedia stream is closed.

A reverse charging device for a multimedia stream is applied to an IP multimedia stream subsystem, where the calling party and the called party perform media negotiation after the call is established; the device includes: a setting unit and a negotiation unit, where

a setting unit, configured to: when the calling party and the called party perform media negotiation of the multimedia stream, set an identifier of the reverse charging for the multimedia stream that performs reverse charging in the signaling message;

The negotiating unit is configured to implement reverse charging negotiation of the multimedia stream by using a signaling message.

Preferably, the setting unit is further configured to: expand a signaling message, and add a field indicating reverse charging.

Preferably, the setting unit is further configured to: add a field that carries the request identifier of the reverse charging, and/or add a field that carries an identifier that allows or rejects the reverse charging request;

Preferably, the setting unit is further configured to: add a field that carries the request identifier of the multimedia stream identifier as a reverse charging, and/or add a field that carries an identifier that allows or rejects the reverse charging request;

In the signaling message, the identifier of the reverse charging is set for the multimedia stream that performs reverse charging, and is: Adding the identifier of the multimedia stream of the requested reverse charging to the field of the signaling message addition requesting the reverse charging method sent by the calling party, and adding the signaling message of the reverse charging response sent by the called party In the field, an identifier for allowing or rejecting reverse charging is added to the identity of the multimedia stream for which the reverse charging is requested.

Preferably, the device further includes:

The closing unit is configured to close the rejected multimedia stream after the called party rejects the reversed billed multimedia stream requested by the calling party.

In the present invention, by setting the indication flag of the reverse charging in the signaling message, the calling and the called parties can perform the reverse charging negotiation of the multimedia stream simultaneously during the media negotiation, so that the multimedia stream can be reversed. Billing. The invention expands the application of reverse charging, and facilitates the reverse charging negotiation of the multimedia stream by both the calling party and the called party. DRAWINGS

1 is a flowchart of a method for inverting charging of a multimedia stream according to Embodiment 1 of the present invention; FIG. 2 is a flowchart of a method for inverting charging of a multimedia stream according to Embodiment 2 of the present invention; FIG. 4 is a flowchart of a method for inverting charging of a multimedia stream according to Embodiment 4 of the present invention; FIG. 5 is a structural diagram of a reverse charging apparatus for a multimedia stream according to the present invention; schematic diagram. detailed description

The basic idea of the present invention is: by setting an indication flag of the reverse charging in the signaling message, the calling and called parties can simultaneously perform the reverse charging negotiation of the multimedia stream when performing media negotiation, thereby enabling the multimedia stream to be Reverse charging is performed.

The present invention will be further described in detail below with reference to the accompanying drawings.

In the present invention, the signaling message needs to be correspondingly extended to support the reverse of the multimedia stream. Billing negotiation. In the present invention, the multimedia stream signaling message mainly refers to a Session Initiation Protocol (SIP) message or a Session Description Protocol (SDP) message.

The present invention separately describes how the above signaling messages are extended.

For SIP messages, the header is extended, that is, the SIP header with reverse charging is set, which is called Reverse Charging Header _{0. The} Reverse Charging Header carries the identifiers of various multimedia streams that are expected to perform reverse charging. It is indicated that these multimedia streams are expected to perform reverse charging.

When reverse charging is desired, a Reverse Charging Header is constructed, carrying identifiers of various multimedia streams that are expected to perform reverse charging, to indicate that these multimedia streams are expected to be reversed. The identification information of the reverse charging can be directly inserted into the Reverse Charging Header. To simplify the processing, the line number of the multimedia stream in the signaling message can be used as the identifier of the multimedia stream. Specifically, the signaling message itself carries the information of the multimedia stream, generally referred to as m rows, and each m row corresponds to a multimedia stream, so that when the identified multimedia stream is inserted in the Reverse Charging Header, the direct insertion is performed. The identifier m[n] may be, wherein n represents the order of m rows of the multimedia stream in the currently used SDP, such as the first m row, and n is set to 1.

After receiving the call request carrying the Reverse Charging Header, the called (callee) performs reverse charging negotiation and constructs a Reverse Charging Header in the response message, and retains the m-line order of the initiator in the Reverse Charging Header, if the corresponding multimedia is rejected. The reverse charging of the flow needs to be rejected after the m line; if the reverse charging of the corresponding multimedia stream is accepted, the identifier needs to be accepted after the m line.

The network side records the result of the reverse charging negotiation negotiated by the two users. For the multimedia stream identified as accepted in the Reverse Charging Header, the charging is performed according to the called party; the multimedia stream identified as the rejection in the Reverse Charging Header, and the Reverse Charging Header The multimedia stream that appears is billed according to the caller.

For SDP messages, it is mainly to extend the attributes of the m line. Specifically, in SDP Offer In the SDP Answer, the Reverse Charging Attribute indicates the negotiation result of the reverse charging.

When it is desired to perform reverse charging for some or all of the multimedia streams in the multimedia stream, the Reverse Charging Attribute is inserted in the m rows of these multimedia streams for which reverse charging is desired. For multimedia episodes that do not want reverse charging, you do not need to carry Reverse Charging Attribute. That is to say, for the signaling message, if the Reverse Charging Attribute identifier is carried in each row of the multimedia stream information line, it means that the reverse charging request is required for the multimedia stream, and the multimedia identifier of the Reverse Charging Attribute is not carried. For the stream information line, the corresponding multimedia stream does not need to be reversed for billing negotiation.

After receiving the SDP Offer carrying the Reverse Charging Attribute, the called party that receives the reverse charging request performs reverse charging and negotiation for the corresponding multimedia stream, and constructs a Reverse Charging Attribute in the SDP Answer. If the reverse charging of the corresponding multimedia stream is rejected, the Rejected is required in the Reverse Charging Attribute of the m line; if the reverse charging of the corresponding multimedia stream is accepted, it needs to be in the Reverse Charging Attribute of the m line. Identified Accepted.

The network side records the result of the reverse charging negotiation negotiated by the two users. For the multimedia stream identified as accepted in the Reverse Charging Attribute, the charging is performed according to the called party; the multimedia stream identified as the reject in the Reverse Charging Attribute, and not in the m line. A multimedia stream that identifies the Reverse Charging Attribute, billed by the calling party.

The multimedia stream negotiation involved in the present invention mainly relates to the following application scenarios:

Case A1, for the calling party to establish a call, the called party initiates a media handover, such as initiating a Re-INVTE request, and the Re-INVTE request carries an offer (Offer). The caller carries an response (Answer) and a reverse charging indication for the multimedia stream in a response message such as lxx or 2xx. In general, the caller preferably returns 1XX in consideration of carrying a reverse charging indication for the multimedia stream. Called After the response message, the reverse charging negotiation result information is carried in a subsequent message such as a PRACK or an ACK. For the media component that is called to reject the reverse charging, the called party needs to close the corresponding media component through the new Offer. For example, in the Offer SDP of the Offer, the IP and Port of the corresponding media are set to 0. The new Offer message can be carried in messages such as UPDATE, PRACK, and Re-INVITE.

It should be noted that the above-mentioned Offer and Answer are mainly for the reverse charging negotiation, that is, the signaling message initiated by the calling party that initiates the reverse charging request, which is considered to carry the Offer, and the response is reversed. The signaling message initiated by the called party to the charging request is considered to carry the Answer. In the present invention, the Offer or the Answer substantially refers to the reverse charging identifier described above, that is, the extended portion of the SIP or SDP message.

Case A2, for the calling party to establish a call, the called party initiates a media handover, such as initiating a Re-INVTE request, without carrying an offer. The caller carries the Offer and the reverse charging indication for the multimedia stream in response messages such as lxx (generalized message, 100~199 message) or 2xx (generalized message, 200~299 message). In general, the caller preferably returns to lxx in consideration of carrying a reverse charging indication for the multimedia stream. After receiving the response message, the called party carries the answer and reverses the charging negotiation result in subsequent messages such as PRACK or ACK. For the media component that the called party refuses to reverse the billing, the called party closes the corresponding media component in Answer. For example, in the SDP of Answer, set the IP and Port of the corresponding media to 0.

Case B1, the call is initiated by the calling party, and the mediation is initiated by the calling party, such as initiating a Re-INVITE request, carrying the Offer, and inverting the charging indication of the multimedia stream. The called party carries the Answer and the reverse charging negotiation result in the response message, such as lxx or 2xx. For the media component that is called to reject the reverse charging, the called party closes the corresponding media component in Answer. For example, in Answer SDP of Answer, set the IP and Port of the corresponding media to 0. In general, the called party preferably returns 1 _{XX in} consideration of carrying a reverse charging indication for the multimedia stream.

Case B2, the call is initiated by the calling party, and the mediation is initiated by the calling party. If the Re-INVITE request is initiated, the offer is not carried, and the reverse charging indication for the multimedia stream is carried. Called at The response message, such as lxx or 2xx, carries the Offer and reverses the charging negotiation result. The called party can avoid carrying the media component of the called party that refuses to reverse the billing in the Offer. Since the called party has returned the reverse charging negotiation result, there is no need to prefer lxx here.

The essence of the technical solution of the present invention will be further clarified by specific examples below. It should be noted that, in the following examples of the present invention, the signaling message exchanged between the calling party and the called party mainly refers to the foregoing SIP or SDP message, and the structure of the foregoing message has been described in detail in the foregoing, to ensure the following The completeness of the example process is not further described. It should be noted that the extension of the signaling message is easy to implement.

Embodiment 1

This example is for the Case A scenario described above. FIG. 1 is a flowchart of a method for inverting charging of a multimedia stream according to Embodiment 1 of the present invention. As shown in FIG. 1 , the method for inverting a multimedia stream in this example specifically includes the following steps:

Step 101: The called party sends a media switching request (such as Re-INVITE) to the called network, such as IMS, Softswitch, etc., carrying the Offer;

Step 102: The called network accepts the request and forwards the request to the calling network. Step 103: The calling network accepts the request and forwards the request to the calling party.

Step 104: The calling party sends the answer and the reverse charging indication for the multimedia stream to the calling network in response to the message, lxx or 2xx;

Step 105: The calling network accepts the response message, and forwards the response message to the called network.

Step 106: The called network accepts the response, and forwards the response message to the called party. Step 107: The called party carries the reverse charging negotiation result in the PRACK or ACK message, and sends the result to the called network.

Step 108: The called network forwards the message to the calling network.

Step 109, the calling network forwards the message to the calling party; Step 110, the modification of the corresponding media stream is completed;

Step 111: The called party closes the media stream whose rejection is reversed by the new offer message through the new request message, and sends the request message to the called network.

Step 112: The called network forwards the message to the calling network.

Step 113, the calling network forwards the message to the calling party;

Step 114: The calling party confirms that the corresponding media is closed, and sends an answer in the response message to the calling network.

Step 115: The calling network forwards the message to the called network.

Step 116: The called network forwards the message to the called party.

Embodiment 2

This example is for the Case A1 scenario described above. FIG. 2 is a flowchart of a reverse charging method for a multimedia stream according to Embodiment 2 of the present invention. As shown in FIG. 2, the reverse charging method of the multimedia stream in this example specifically includes the following steps:

Step 201: The called party sends a media switching request (such as Re-INVITE) to the called network, such as IMS, Softswitch, and the like, without carrying an offer;

Step 202, the called network accepts the request, and forwards the request to the calling network; Step 203, the calling network accepts the request, and forwards the request to the calling party;

Step 204: The calling party sends an offer and a reverse charging indication for the multimedia stream to the calling network in response to the message, lxx or 2xx;

Step 205: The calling network accepts the response message, and forwards the response message to the called network.

Step 206: The called network accepts the response, and forwards the response message to the called party. Step 207: The called party carries the Answer and reverse charging negotiation result in the PRACK or ACK message, and sends the result to the called network. The called party shut down the media that refused to reverse billing in Answer; Step 208: The called network forwards the message to the calling network.

Step 209, the calling network forwards the message to the calling party;

Step 210: The modification of the corresponding media stream is completed.

Embodiment 3

This example is for the Case Case scenario described above. FIG. 3 is a flowchart of a reverse charging method for a multimedia stream according to Embodiment 3 of the present invention. As shown in FIG. 3, the reverse charging method of the multimedia stream in this example specifically includes the following steps:

Step 301: The calling party sends a media switching request (such as Re-INVITE) to the calling network, such as IMS, Softswitch, etc., carrying the Offer and the reverse charging indication for the multimedia stream; Step 302, the called network receiving The request is forwarded to the calling network; step 303, the calling network accepts the request and forwards it to the calling party;

Step 304: The called party sends the answer and the reverse charging negotiation result to the calling network in the response message, lxx or 2xx, and the called party closes the media stream whose rejection is reversed in the answer;

Step 305: The called network accepts the response message, and forwards the response message to the calling network.

Step 306, the calling network accepts the response, and forwards the response message to the calling party; Step 307, the modification of the corresponding media stream is completed.

Embodiment 4

This example is for the Case B2 scenario described above. 4 is a flowchart of a reverse charging method for a multimedia stream according to Embodiment 4 of the present invention. As shown in FIG. 4, the reverse charging method of the multimedia stream in this example specifically includes the following steps:

Step 401: The calling party sends a media switching request (such as Re-INVITE) to the network of the calling party, such as the IMS and the Softswitch, and does not carry the Offer, and carries the reverse charging for the multimedia stream. Step 402, the called network accepts the request, and forwards the request to the calling network; Step 403, the calling network accepts the request, and forwards the request to the calling party;

Step 404: The called party sends the offer and the reverse charging negotiation result to the calling network in the response message, lxx or 2xx, and the called party avoids carrying the media component of the called party rejecting the reverse charging in the Offer;

Step 405: The called network accepts the response message, and forwards the response message to the calling network.

Step 406: The calling network accepts the response, and forwards the response message to the calling party. Step 407: The modification of the corresponding media stream is completed.

It should be noted that, although the reverse charging method of the multimedia stream of the present invention is to close the multimedia stream that refuses to reverse charging, the called multimedia stream may not be closed, and the corresponding multimedia stream is calculated by the calling party. fee.

5 is a schematic structural diagram of a reverse charging apparatus of a multimedia stream according to the present invention. As shown in FIG. 5, the reverse charging apparatus of the multimedia stream of the present invention is mainly applied to an IP multimedia streaming subsystem, a calling party and a called party. The device performs media negotiation after the call is established; the device includes: a setting unit 50 and a negotiating unit 51, where

The setting unit 50 is configured to: when the calling party and the called party perform media negotiation of the multimedia stream, set, in the signaling message, an identifier of the reverse charging for the multimedia stream that performs reverse charging;

The negotiating unit 51 is configured to implement reverse charging negotiation of the multimedia stream by using a signaling message.

The setting unit 50 is further configured to expand the signaling message and add a field indicating the reverse counting.

The setting unit 50 is further configured to: add a field that carries the request identifier of the reverse charging, and/or add a field that carries an identifier that allows or rejects the reverse charging request;

In the field of the signaling message requesting for the reverse charging of the sending by the calling party, the request identifier of the reverse charging is added for the multimedia stream requesting the reverse charging, and/or the reverse is sent by the called party. Count In the field of the fee-responsive signaling message addition, an identifier for allowing or rejecting reverse charging is added for the multimedia stream requesting reverse charging.

Alternatively, the setting unit 50 is further configured to: add a field that carries the request identifier of the multimedia stream identifier as a reverse charging, and/or add a field that carries an identifier that allows or rejects the reverse charging request;

On the basis of the reverse charging device of the multimedia stream of the present invention shown in FIG. 5, the device further includes:

The closing unit (not shown) is configured to close the rejected multimedia stream after the called party rejects the multimedia stream of the reverse charging requested by the calling party.

It should be understood by those skilled in the art that the reverse charging device of the multimedia stream of the present invention is mainly applied to a communication system supporting a multimedia stream, the network structure of the communication system itself is not changed, and the processing capability of the corresponding network element is changed. The foregoing processing units in the reverse charging device of the multimedia stream of the present invention may be located in different network elements of the actual communication system, as needed to support the previously modified signaling messages.

It should be understood by those skilled in the art that the reverse charging device of the multimedia stream of the present invention is mainly designed to implement the reverse charging method of the multimedia stream described above. Therefore, the functions of the foregoing processing units may refer to the reverse of the foregoing multimedia stream. Understand the relevant description of the billing method. Those skilled in the art should understand that each of the above processing units can be implemented by a specific hardware circuit or a processor and corresponding execution software. The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

A reverse charging method for a multimedia stream, the method comprising: when a calling party performs media negotiation of a multimedia stream, setting a reversal meter for a multimedia stream for performing reverse charging in a signaling message The identification of the fee, realizing the reverse charging negotiation of the multimedia stream.

The method according to claim 1, wherein before the setting of the reverse charging identifier for the multimedia stream for performing reverse charging in the signaling message, the method further includes:

3. The method according to claim 2, wherein the adding a field indicating reverse charging is:

The method according to claim 2, wherein the adding a field indicating reverse charging is:

Adding the identifier of the multimedia stream of the requested reverse charging to the field of the signaling message requesting for reverse charging charging sent by the calling party, and signaling cancellation of the reverse charging response sent by the called party In the field of the information addition, an identifier for allowing or rejecting reverse charging is added to the identifier of the multimedia stream for which the reverse charging is requested.

The method according to claim 4, wherein the identifier of the multimedia stream comprises sequence number information of the multimedia stream information line of the multimedia message in the signaling message.

The method according to any one of claims 1 to 5, wherein the signaling message comprises a Session Initiation Protocol SIP message, or a Session Description Protocol SDP message.

The method according to claim 6, wherein when the signaling message is a SIP message, the identifier of the reverse charging is carried in a newly extended message header of the SIP message, or is carried in a SIP message. In the newly expanded field of the header;

When the signaling message is an SDP message, the extended SDP message attribute line is used as an identifier indicating reverse charging.

The method according to claim 6, wherein the method further comprises: after the called party rejects the reversed billed multimedia stream requested by the calling party, the rejected multimedia stream is closed.

A reverse charging device for a multimedia stream, which is applied to an IP multimedia stream subsystem, where the calling party and the called party perform media negotiation after the call is established; and the device includes: setting unit and negotiating Unit, where

The device according to claim 9, wherein the setting unit is further configured to: expand a signaling message, and add a field indicating reverse charging.

The device according to claim 10, wherein the setting unit is further configured to: add a field that carries the request identifier of the reverse charging, and/or add a bearer to allow or reject the reverse charging request. The identified field; In the field of the signaling message requesting for the reverse charging of the sending by the calling party, the request identifier of the reverse charging is added for the multimedia stream requesting the reverse charging, and/or the reverse is sent by the called party. In the field of the signaling message addition of the charging response, an identifier for allowing or rejecting reverse charging is added for the multimedia stream requesting reverse charging.

The device according to claim 10, wherein the setting unit is further configured to: add a field that carries the multimedia stream identifier as a request identifier for reverse charging, and/or add a bearer permission or a rejection reverse The field of the identification of the billing request;

The device according to any one of claims 9 to 12, wherein the device further comprises: