CN111049833B - Port multiplexing control method, device, server and storage medium - Google Patents
Port multiplexing control method, device, server and storage medium Download PDFInfo
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- CN111049833B CN111049833B CN201911286215.3A CN201911286215A CN111049833B CN 111049833 B CN111049833 B CN 111049833B CN 201911286215 A CN201911286215 A CN 201911286215A CN 111049833 B CN111049833 B CN 111049833B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1069—Session establishment or de-establishment
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
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Abstract
The embodiment of the invention discloses a port multiplexing control method, a port multiplexing control device, a server and a storage medium. The method comprises the following steps: a signaling server receives a first multimedia call request pointing to a called party; if the called party is determined to be affiliated to other signaling servers, sending a second multimedia call request comprising a port multiplexing identifier to a media server at the same level as the called party; and receiving a multiplexing port returned by the media server at the same level as the media server, aiming at the second multimedia call request, and sending a third multimedia call request comprising the multiplexing port to a next-level signaling server of the media server. The technical scheme of the embodiment of the invention realizes that various audio and video code streams between the cross levels can share one multiplexing port when multiple paths of cross-level calls exist, thereby improving the utilization rate of the port and the bandwidth.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a port multiplexing control method, a port multiplexing control device, a server and a storage medium.
Background
Session Initiation Protocol (SIP) is a text-based application-layer signaling control Protocol for multiparty multimedia communications. It is independent of underlying transport protocols and is used to establish, modify and terminate two-party or multi-party multimedia sessions of Internet Protocol (IP).
At present, audio code streams and video code streams between cross-level calls need to be transmitted through different ports, and each level of media server needs to allocate ports for multiple code streams respectively, so that the more the number of session paths is, the greater the bandwidth and the port occupancy rate are, and the greater the probability of signaling blocking is caused.
Disclosure of Invention
The embodiment of the invention provides a port multiplexing control method, a device, a server and a storage medium, so that when multiple paths of cross-level calls exist, various audio and video code streams between cross levels can share one multiplexing port, and the utilization rate of the port and bandwidth is improved.
In a first aspect, an embodiment of the present invention provides a port multiplexing control method, including:
a signaling server receives a first multimedia call request pointing to a called party;
if the signaling server determines that the called party is affiliated to other signaling servers, a second multimedia call request comprising a port multiplexing identifier is sent to a media server at the same level as the signaling server;
the signaling server receives a multiplexing port returned by the media server at the same level as the signaling server for the second multimedia call request, and sends a third multimedia call request comprising the multiplexing port to a next signaling server of the signaling server;
the multiplex port is used for indicating the media server at the same level as the multiplex port to receive the multimedia information fed back by the called party and provided by the media server at the same level as the next level signaling server.
Optionally, after receiving the first multimedia call request directed to the called party, the signaling server further includes:
the signaling server extracts port information from the first multimedia call request;
the port information comprises a non-multiplexing port used for indicating a calling party to receive the multimedia information fed back by the called party and provided by a media server at the same level as the calling party, or comprises a multiplexing port used for indicating a media server at the same level as a previous level signaling server to receive the multimedia information fed back by the called party and provided by a media server at the same level as the calling party.
Optionally, after the signaling server receives the first multimedia call request directed to the called party, the method further includes:
if the signaling server determines that the called party is affiliated to the signaling server, the signaling server sends a fourth multimedia call request comprising a port non-multiplexing identifier to a media server at the same level as the signaling server;
the signaling server receives a non-multiplexing port returned by a media server at the same level as the signaling server for a fourth multimedia call request, and sends a fifth multimedia call request comprising the non-multiplexing port to the called party;
the non-multiplexing port is used for indicating the media server at the same level as the non-multiplexing port to receive the multimedia information fed back by the called party.
Optionally, after sending the fifth multimedia call request including the non-multiplexing port to the called party, the method further includes:
and if the signaling server receives a response message returned by the called party aiming at the fifth multimedia call request, the signaling server sends a sixth multimedia call request comprising a multiplexing port and a port non-multiplexing identifier for receiving the multimedia information by a media server at the same level as the signaling server at the upper level of the signaling server to the media server at the same level as the signaling server.
Optionally, after sending the third multimedia call request including the multiplexing port to the next-stage signaling server of the mobile terminal, the method further includes:
and if the signaling server receives a response message returned by the next-level signaling server and the calling party belongs to the signaling server, the signaling server sends a seventh multimedia call request comprising a non-multiplexing port and a port non-multiplexing identifier, which are used by the calling party for receiving the multimedia information, to a media server at the same level as the signaling server.
Optionally, before the signaling server receives the first multimedia call request directed to the called party, the method further includes:
the signaling server predefines that the head domain of the call request between the signaling server and the media server comprises a subject field; the format of the subject field is: SIP: identification of whether a port is multiplexed @ hostname: port number.
In a second aspect, an embodiment of the present invention further provides a port multiplexing control method, including:
the media server receives a multimedia call request sent by a signaling server at the same level as the media server;
when the multimedia call request includes a port multiplexing identifier, the media server sends a multiplexing port corresponding to the multimedia call request to a signaling server at the same level as the media server;
when the multimedia call request includes the port non-multiplexing identification, the media server sends the non-multiplexing port corresponding to the multimedia call request to the signaling server at the same level as the media server.
In a third aspect, an embodiment of the present invention further provides a port multiplexing control apparatus, which is executed by a signaling server, and includes:
the first receiving module is used for receiving a first multimedia call request pointing to a called party;
the second sending module is used for sending a second multimedia call request including the port multiplexing identifier to a media server at the same level as the second sending module if the called party is determined to be affiliated to other signaling servers;
a third sending module, configured to receive a multiplexing port returned by a media server at the same level as the third sending module in response to the second multimedia call request, and send a third multimedia call request including the multiplexing port to a next-level signaling server;
the multiplex port is used for indicating the media server at the same level as the multiplex port to receive the multimedia information fed back by the called party and provided by the media server at the same level as the next level signaling server.
In a fourth aspect, an embodiment of the present invention further provides a port multiplexing control apparatus, executed by a media server, including:
a call request receiving module, which is used for receiving a multimedia call request sent by a signaling server at the same level as the call request receiving module;
a first port sending module, configured to send a multiplexing port corresponding to the multimedia call request to a signaling server at the same level as the first port sending module when the multimedia call request includes a port multiplexing identifier;
and the second port sending module is used for sending the non-multiplexing port corresponding to the multimedia call request to the signaling server at the same level as the second port sending module when the multimedia call request comprises the port non-multiplexing identifier.
In a fifth aspect, an embodiment of the present invention further provides a server, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the port reuse control method according to any embodiment of the present invention.
In a sixth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the port reuse control method provided in any embodiment of the present invention.
According to the technical scheme of the embodiment of the invention, after each level of signaling server receives a first multimedia call request pointing to a called party, if the called party is determined to be affiliated to other signaling servers, a second multimedia call request comprising a port multiplexing identifier is sent to a media server at the same level as the signaling server, a multiplexing port returned by the media server at the same level aiming at the second multimedia call request is received, and a third multimedia call request comprising the multiplexing port is sent to a signaling server at the next level of the signaling server.
Drawings
Fig. 1a is a flow chart of a multi-way cross-class call based on SIP flow in the prior art;
fig. 1b is a flowchart of a port multiplexing control method according to a first embodiment of the present invention;
fig. 2 is a flowchart of a port multiplexing control method according to a second embodiment of the present invention;
FIG. 3 is a flow chart of an implementation of an application scenario to which embodiments of the present invention are applicable;
fig. 4 is a schematic structural diagram of a port multiplexing control apparatus according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of a port multiplexing control apparatus according to a fifth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a server in the sixth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
For ease of understanding, a brief description of the prior art multi-way cross-class call procedure based on the SIP flow is provided. As shown in fig. 1a, the signaling process of audio and video of the client a (client a) calling the client b (client b) in a cross-level manner includes the following specific steps:
1. client a initiates a call request to signaling server 1(sipserver 1);
2. the signaling server1 initiates a call request (invite) to the media server 1(mediaserver1) of the peer;
3. the media server1 replies 200OK to the signaling server 1;
4. the signaling server1 finds the address of the signaling server 2(sipserver2) through the routing rule and initiates a call request to the signaling server2 of the next stage;
5. the signaling server2 initiates a call request to the media server 2(mediaserver2) of the peer;
6. the media server2 replies 200OK to the signaling server 2;
7. the signaling server2 initiates a call request to the client B;
8. the client B replies 200OK to the signaling server 2;
9. the signaling server2 initiates a call request to the media server2 for the second time;
10. the media server2 replies to the signaling server 2200 OK;
11. the signaling server2 replies to the signaling server 1200 OK;
12. the signaling server1 initiates a call request to the media server1 for the second time;
13. the media server1 replies to the signaling server 1200 OK;
14. the signaling server1 replies to the client a 200 OK;
15. after the negotiation is successful, the client B sends the audio and video code stream to the media server2, and the media server2 respectively transfers the audio code stream and the video code stream to the media server1 from two different ports and then transfers the audio code stream and the video code stream to the client A from the media server 1.
The inventor discovers that in the process of implementing the scheme of the invention: the code streams of various media types between cross-level calls need to be transmitted through different ports, so that when the number of session paths is more, the occupied ports are more, the possibility of signaling blocking is higher, the bandwidth occupancy rate is higher, and if port multiplexing can be realized, the bandwidth occupancy rate and the port utilization rate can be greatly reduced.
In the prior art, the message processing on the signaling is only processed by the signaling server, the audio and video code stream is only forwarded through the media server, and the receiving and transmitting ports of the audio and video code stream are also managed by the media server, so that the media server cannot know the signaling condition of the audio and video code stream, and cannot effectively judge whether the port multiplexing is needed.
Example one
Fig. 1b is a flowchart of a port multiplexing control method in one embodiment of the present invention, where this embodiment is applicable to a case of multiple cross-class calls based on a SIP flow, and this method may be executed by a port multiplexing control device, which may be implemented by hardware and/or software, and may be generally integrated in a server providing a cross-class call service, for example, a signaling server. As shown in fig. 1b, the method comprises:
In the multi-path cross-level calling process based on the SIP, the signaling server can be used for helping a calling party and a called party to carry out signaling interaction so as to establish a communication link between the two parties and enable the two parties to transmit multimedia code streams. In this embodiment, the signaling server may be any level of signaling server involved in the call request link, for example, the signaling server may be a first level signaling server connected to the calling party, a last level signaling server connected to the called party, or an intermediate signaling server of another level.
Optionally, after receiving the first multimedia call request directed to the called party, the signaling server may further include: the signaling server extracts port information from the first multimedia call request; the port information comprises a non-multiplexing port used for indicating a calling party to receive the multimedia information fed back by the called party and provided by a media server at the same level as the calling party, or comprises a multiplexing port used for indicating a media server at the same level as a previous level signaling server to receive the multimedia information fed back by the called party and provided by a media server at the same level as the calling party. In this embodiment, the multimedia information may include various audio code streams and video code streams, the port providing the multimedia information fed back by the called party is on a media server at the same level as the signaling server, the first multimedia call request includes a port number for receiving the multimedia code stream sent by the media server at the same level as the current signaling server, the port number may be on a media server at the same level as a previous signaling server of the current signaling server or on the calling party, therefore, after the current signaling server receives the first multimedia call request from the calling party or from the previous signaling server, the port number is extracted from the first multimedia call request, and no matter whether the port corresponding to the port number is a multiplexing port or a non-multiplexing port, the subsequent signaling server will send the port information to the media server at the same level by sending the multimedia call request, so that the media server of the peer knows to which port the received called party's multimedia bitstream is to be sent.
Optionally, before the signaling server receives the first multimedia call request directed to the called party, the method may further include: the signaling server predefines that the head domain of the call request between the signaling server and the media server comprises a subject field; the format of the subject field is: SIP: identification of whether a port is multiplexed @ hostname: port number.
In this embodiment, a subject field included in a header field of a call request between the signaling server and the media server is generally a Uniform Resource Identifier (URI) of a home terminal, and has a format of SIP: USER @ IP: PORT, so that the signaling server may notify, through the call request, whether a media server at the same level as the signaling server needs to perform PORT multiplexing in a cross-level call process of a back-to-back model, and the format of the subject field included in the header field of the call request between the signaling server and the media server may be redefined as SIP: PORT @ IP: PORT, that is, a USER name in an original format of the subject field is changed into an Identifier of whether the PORT is multiplexed, so that the media server may allocate a corresponding multiplexed PORT or a non-multiplexed PORT according to the call request sent by the signaling server.
In this embodiment, the multiplexing port refers to a port capable of simultaneously transmitting various audio code streams and various video code streams, and simultaneously performing data transmission on a plurality of multimedia call requests. The non-multiplexing port refers to a port which can only transmit one audio code stream or one video code stream and can only transmit data to one multimedia call request.
In the embodiment, the format of the subject field included in the header field of the call request is redefined, so that the media server can know whether port multiplexing is required, and further the media server does not need to allocate ports for the audio code stream and the video code stream respectively, so that one port can be flexibly and effectively used by various audio and video code streams between the multi-stage media servers, the port occupancy rate is reduced, and the network transmission performance is improved.
It should be noted that, because the client can only use the non-multiplexing port to transmit the audio/video code stream, the multiplexing port cannot be used during the current-level call, and the port multiplexing can be performed only during the cross-level call.
In this embodiment, after receiving a first multimedia call request, a signaling server needs to obtain an address of a called party from a target field included in a header field of the first multimedia call request, and determine whether the called party is registered at the current level, if so, the call is a single-level call, and does not involve cross-level port multiplexing, and does not need to send a second multimedia call request with a port multiplexing identifier to a media server at the same level, and if not, the call relates to a cross-level call, and needs to send a second multimedia call request including the port multiplexing identifier to a media server at the same level, so that the media server at the same level allocates a multiplexing port to receive multimedia information fed back by the called party and sent by a media server at the same level as a next signaling server.
Optionally, during a call, each network element is registered with the signaling server, so that each level of signaling server can quickly know whether a called party is registered at the level, if so, add a port non-multiplexing identifier nousepotmux in a subject field included in a header field of a call request of the call media service, if not, judge whether a next level is the signaling server, if so, add a port multiplexing identifier usrtmux in the subject field included in the header field of the call request of the call media service, if the next level is not the signaling server, but a gateway or a proxy server and other devices corresponding to different signaling flows, it is impossible to know that the next level device needs port multiplexing by adding the port multiplexing identifier in the call request, and at this time, only a normal call request can be sent to the next level device.
The multiplex port is used for indicating the media server at the same level as the multiplex port to receive the multimedia information fed back by the called party and provided by the media server at the same level as the next level signaling server.
In this embodiment, after the signaling server sends the second multimedia call request including the port multiplexing identifier to the media server at the same level as the signaling server itself, the multiplexing port is obtained from a response message for the second multimedia call request returned by the media server at the same level as the signaling server itself, for example, the port number of the multiplexing port is obtained from an SDP (Session Description Protocol) of a response message 200OK, and the port number of the multiplexing port is added to the SDP of the third multimedia call request and sent to the next-level signaling server itself, so that the media server at the same level as the next-level signaling server knows through which port the multimedia code stream of the called party is sent to the media server at the same level as the signaling server itself.
The identifier of whether the port is multiplexed is used for the signaling server to inform the media server at the same level that the signaling server needs to allocate a multiplexing port or a non-multiplexing port for receiving the multimedia information fed back by the called party, and the third multimedia call request is sent to the next level signaling server by the level signaling server, so the third multimedia call request does not need to carry the identifier of whether the port is multiplexed.
On the basis of the foregoing embodiment, optionally, after the signaling server receives the first multimedia call request directed to the called party, the method may further include: if the signaling server determines that the called party is affiliated to the signaling server, the signaling server sends a fourth multimedia call request comprising a port non-multiplexing identifier to a media server at the same level as the signaling server; the signaling server receives a non-multiplexing port returned by the media server at the same level as the signaling server aiming at the fourth multimedia call request, and sends a fifth multimedia call request comprising the non-multiplexing port to a called party; the non-multiplexing port is used for indicating the media server at the same level as the non-multiplexing port to receive the multimedia information fed back by the called party.
In this embodiment, if it is determined that the called party is affiliated to the signaling server at this level, it may be determined that the signaling server at this level is the last signaling server connected to the called party, and a cross-level call is not involved between the signaling server at this level and the called party, so that a fourth multimedia call request including a port non-multiplexing identifier may be sent to a media server at the same level as the called party, and after receiving a non-multiplexing port returned by the media server at the same level, the non-multiplexing port is sent to the called party through a fifth multimedia call request, so that the called party knows through which port the multimedia information requested by the calling party needs to be sent to the media server at the same level as the called party.
Optionally, after sending the fifth multimedia call request including the non-multiplexing port to the called party, the method may further include: and if the signaling server receives a response message returned by the called party aiming at the fifth multimedia call request, the signaling server sends a sixth multimedia call request comprising a multiplexing port and a port non-multiplexing identifier for receiving the multimedia information by a media server at the same level as the signaling server at the upper level of the signaling server to the media server at the same level as the signaling server.
In this embodiment, because of the back-to-back model, in a call process, the signaling server needs to send a call request to the media server at the same level as itself twice, where the first call request is used to obtain a port at which the media server at the same level as itself receives multimedia information sent by the media server at the same level as itself at a next level signaling server or a called party, and the second call request is used to send a port at which the media server at the same level as itself at a previous level signaling server or a calling party receives multimedia information to the media server at the same level as itself at a calling party. Therefore, after the signaling server receives a response message returned by the called party for the fifth multimedia call request, the signaling server sends a second call request to the media server at the same level as the signaling server, so as to send the multiplexing port, receiving the multimedia information, of the media server at the same level as the signaling server at the previous level of the signaling server to the media server at the same level as the signaling server at the previous level, so that the media server at the same level as the signaling server at the previous level provides the multimedia information of the called party to the media server at the same level as the signaling server at the previous level of the signaling server through the multiplexing port.
It should be noted that, the multiplexed port exists in the SDP of the sixth multimedia call request, and the port non-multiplexed identifier exists in the subject header field, at this time, because there is a multiplexed port in the call request, the port non-multiplexed identifier in the subject header field does not work, and the media server will use the multiplexed port to perform data transmission, and will not reallocate other ports. Optionally, after sending the third multimedia call request including the multiplexing port to the next-stage signaling server of the mobile terminal, the method may further include: and if the signaling server receives a response message returned by the next-level signaling server and the calling party belongs to the signaling server, the signaling server sends a seventh multimedia call request comprising a non-multiplexing port and a port non-multiplexing identifier, which are used by the calling party for receiving the multimedia information, to a media server at the same level as the signaling server.
In this embodiment, after receiving the response message returned by the next signaling server, the signaling server needs to send a second call request to the media server at the same level as itself, so as to send the media server at the same level as itself, or a port of the calling party, which receives the multimedia information, to the media server at the same level as itself, so that the media server at the same level as itself provides the multimedia information of the called party to the media server at the same level as itself, through the port. Before initiating the second call, it needs to judge whether the calling party is affiliated to itself, if yes, it sends the seventh multimedia call request including the non-multiplexing port and port non-multiplexing identification of the calling party receiving multimedia information to the media server at the same level as itself, otherwise, it sends the eighth multimedia call request including the multiplexing port and port non-multiplexing identification of the media server at the same level as itself receiving multimedia information to the media server at the same level as itself upper signaling server.
It should be noted that, no matter whether there is a multiplexing port or a non-multiplexing port in the SDP of the second call request, the identifier in the subject header field of the call request indicating whether the port is multiplexed or not does not work, and the media server will use the port in the SDP for data transmission and will not reallocate other ports.
According to the technical scheme of the embodiment of the invention, after each level of signaling server receives a first multimedia call request pointing to a called party, if the called party is determined to be affiliated to other signaling servers, a second multimedia call request comprising a port multiplexing identifier is sent to a media server at the same level as the signaling server, a multiplexing port returned by the media server at the same level as the signaling server is received aiming at the second multimedia call request, and a third multimedia call request comprising the multiplexing port is sent to a next level of signaling server, so that the problems that in the prior art, audio code streams and video code streams between cross-level calls need to be transmitted through different ports, and the bandwidth and the port occupancy rate are large are solved, various audio and video code streams between cross-levels can share one multiplexing port when multiple cross-level calls exist, and the utilization rate of the port and the bandwidth is improved.
Example two
Fig. 2 is a flowchart of a port multiplexing control method in the second embodiment of the present invention, and this embodiment may be applied to a case of a multi-way cross-level call based on a SIP flow, and this method may be executed by a port multiplexing control device, which may be implemented by hardware and/or software, and may be generally integrated in a server providing a cross-level call service, for example, a media server. As shown in fig. 2, the method includes:
In this embodiment, the media server is mainly used for port allocation, port management, and forwarding of multimedia information for various audio/video code streams. For example, the media server may allocate a port for receiving or sending multimedia information according to a multimedia call request sent by a signaling server at the same level as the media server.
For example, the media server may receive a ninth multimedia call request including a port multiplexing identifier sent by the signaling server of the same peer at the time of the first call, or may receive a tenth multimedia call request including a port non-multiplexing identifier sent by the signaling server of the same peer at the time of the first call, or may receive an eleventh multimedia call request including a multiplexing port and a port non-multiplexing identifier, where the multiplexing port and the port non-multiplexing identifier receive multimedia information, sent by the previous media server of the same peer at the time of the second call, or may receive a twelfth multimedia call request including a non-multiplexing port and a port non-multiplexing identifier, where the non-multiplexing port and the port non-multiplexing identifier receive multimedia information from the calling party, sent by the signaling server of the same peer at the time of the second call.
In this embodiment, the multimedia call request may include a port multiplexing identifier USEPORTMUX, and after receiving the multimedia call request, the media server first determines whether a port multiplexing identifier is present in a subject header field of the call request, and if so, allocates a multiplexing port capable of transmitting various audio/video code streams, and adds a port number of the multiplexing port to an SDP of a response message 200OK corresponding to the multimedia call request, and returns the port number to a signaling server at the same level as the media server.
Illustratively, when the media server receives a ninth multimedia call request including a port multiplexing identifier, which is sent by a signaling server at the same level as the media server at the first call, the media server allocates a multiplexing port on the media server according to the call request to receive multimedia information fed back by a called party, which is sent by a next-level media server.
It should be noted that the port multiplexing identifier exists only in the subject header field of the first multimedia call request sent by the signaling server at the same level as the media server itself, and only the port non-multiplexing identifier exists in the subject header field of the second multimedia call request, so that the media server only judges whether the subject header field in the call request has the port multiplexing identifier when the signaling server at the same level as the media server initiates a call for the first time, and allocates a multiplexing port when the port multiplexing identifier exists. Step 230, when the multimedia call request includes the port non-multiplexing identifier, the media server sends the non-multiplexing port corresponding to the multimedia call request to the signaling server at the same level as the media server.
In this embodiment, the multimedia call request may further include a port non-multiplexing identifier nous ethernet mux, and after the media server receives the multimedia call request sent by the signaling server at the same level as the media server during the first call, if it is determined that the call request includes the port non-multiplexing identifier, the media server allocates non-multiplexing ports to various audio/video code streams, and adds the port number of the non-multiplexing port to an SDP of a response message 200OK corresponding to the multimedia call request and returns the SDP to the signaling server at the same level as the media server.
In this embodiment, when the media server receives a multimedia call request sent by a signaling server at the same level as itself during a first call, it may first determine whether a port non-multiplexing identifier is in a subject header field of the call request, and if so, may determine that the media server at this level is the last level media server connected to the called party, and needs to allocate a non-multiplexing port on itself to receive multimedia information fed back by the called party and sent by the called party.
In this embodiment, when the media server receives a multimedia call request sent by the signaling server at the same level as itself during the second call, the media server directly uses the port in the SDP of the call request as the port for sending the multimedia information fed back by the called party to the upper-level multimedia server or the calling party, and does not additionally allocate other ports.
It should be noted that, although the port non-multiplexing identifier exists in the subject header field of the first multimedia call request sent by the signaling server at the same level as the media server itself, or may exist in the subject header field of the second multimedia call request, the media server only determines whether the subject header field in the call request has the port non-multiplexing identifier when the signaling server at the same level as the media server itself initiates a call for the first time, and allocates a non-multiplexing port when the port non-multiplexing identifier exists, and when the signaling server at the same level as the media server itself initiates a call for the second time, because the allocated port is included in the SDP of the call request, the port non-multiplexing identifier in the subject header field does not function, and no additional port needs to be allocated. The technical scheme of the embodiment of the invention is that each level of media server receives a multimedia call request sent by a signaling server at the same level as the level of the media server, when the multimedia call request comprises a port multiplexing identifier, a multiplexing port corresponding to the multimedia call request is sent to the signaling server at the same level as the level of the media server, and when the multimedia call request comprises a port non-multiplexing identifier, a non-multiplexing port corresponding to the multimedia call request is sent to the signaling server at the same level as the level of the media server, thereby solving the problems that audio code streams and video code streams between cross-level calls need to be transmitted through different ports and the bandwidth and the port occupancy rate are larger in the prior art, realizing that various audio and video code streams between cross-levels can share one multiplexing port when multiple cross-level calls exist, and improving the utilization rate of the port and the bandwidth.
EXAMPLE III
Fig. 3 is a flowchart of an implementation of an application scenario to which an embodiment of the present invention is applicable, and the present embodiment may be combined with various alternatives in the foregoing embodiments. Specifically, referring to fig. 3, taking a two-stage call as an example, assuming that two-stage servers include a first-stage signaling server sipserver1 and a second-stage signaling server sipserver2, and a corresponding first-stage media server mediaserver1 and a second-stage media server mediaserver2, a Client a registers on the sipserver1, a Client B registers on the sipserver2, and the sipserver2 registers on the sipserver1, and the Client a requests an audio stream and a video stream from the Client B, the two-stage call flow includes the following steps:
f1: the Client A sends a first multimedia call request to sipserver1, and the called party is Client B.
In this embodiment, the first multimedia call request includes a first non-multiplexing port for instructing the calling party to receive the multimedia information fed back by the called party, which is provided by the mediaserver 1.
F2: sipserver1 determines that the called party is on sipserver2 and sipserver2 is also a signaling server, and therefore sends a second multimedia call request with a port multiplex identifier to the home level mediaserver1, i.e., the keyword "useeportmux" is filled in the subject field of the second multimedia call request.
In this embodiment, the second multimedia call request is used to enable the mediaserver1 to allocate a multiplexing port, so as to receive the multimedia information fed back by the called party and sent by the mediaserver2 through the multiplexing port.
F3: mediaserver1 replies to sipserver1 with a 200OK with a multiplexed port.
F4: sipserver1 sends a third multimedia call request to sipserver2 and writes the multiplex port in the SDP of the third multimedia call request.
In this embodiment, the third multimedia call request is used to make sipserver2 know that mediaserver2 needs to send the audio/video code stream of the called party to mediaserver1 through the multiplexing port.
F5: the sipserver2 judges that the called party is on the current level signaling server, and thus, sends a fourth multimedia call request including a port non-multiplexing identification to the current level media server mediaserver2, that is, the key word "nous eportmux" is filled in the subject field of the fourth multimedia call request.
In this embodiment, the fourth multimedia call request is used to enable the mediaserver2 to allocate a second non-multiplexing port, so as to receive the multimedia information sent by the called party through the second non-multiplexing port.
F6: mediaserver2 replies to sipserver2 with a 200OK with a second non-multiplexed port.
F7: sipserver2 sends a fifth multimedia call request to Client B and writes the second non-multiplexed port into the SDP of the fifth multimedia call request.
In this embodiment, the fifth multimedia call request is used to make the called party know that the audio/video code stream is sent to the mediaserver2 through the second non-multiplexing port.
F8: client B replies to sipserver 2200 OK.
F9: the sipserver2 calls the mediaserver2 for the second time, that is, sends a sixth multimedia call request including a multiplexing port and a port non-multiplexing identifier to the mediaserver2, and fills a keyword "nous eportmux" in a subject field of the sixth multimedia call request.
In this embodiment, the sixth multimedia call request is used to make the mediaserver2 know that the audio/video code stream is sent to the mediaserver1 through the multiplexing port, at this time, the port non-multiplexing identifier does not work, and the media server does not allocate a port. F10: mediaserver2 replies to sipserver 2200 OK.
F11: sipserver2 reverts to sipserver 1200 OK.
F12: sipserver1 calls mediaserver 1a second time, i.e., sends a seventh multimedia call request including a port non-multiplexing identification to mediaserver1, and fills the key "nous eportmux" in the subject field of the seventh multimedia call request.
In this embodiment, the seventh multimedia call request is used to make the mediaserver1 know that the audio/video code stream is sent to the called party through the first non-multiplexing port, at this time, the port non-multiplexing identifier does not function, and the media server does not allocate a port.
F13: mediaserver1 reverts to sipserver 1200 OK.
F14: sipserver1 replies to Client a 200 OK.
Through the above signaling interaction, the audio stream and the video stream may share the same transmitting port and the same receiving port when going from mediaserver2 to mediaserver 1. Therefore, when calling, the signaling server only needs to judge whether the call is a cross-level call and then inform the media server at the same level whether to multiplex ports.
Example four
Fig. 4 is a schematic structural diagram of a port multiplexing control apparatus according to a fourth embodiment of the present invention. The embodiment can be applied to the case of multi-path cross-class calling based on SIP flow. As shown in fig. 4, the port multiplexing control apparatus is executed by a signaling server, and includes:
a first receiving module 410 for receiving a first multimedia call request directed to a called party;
a second sending module 420, configured to send a second multimedia call request including a port multiplexing identifier to a media server in the same level as the second sending module if it is determined that the called party is affiliated to another signaling server;
a third sending module 430, configured to receive a multiplexing port returned by a media server at the same level as itself for the second multimedia call request, and send a third multimedia call request including the multiplexing port to a next-level signaling server at the next level of itself;
the multiplex port is used for indicating the media server at the same level as the multiplex port to receive the multimedia information fed back by the called party and provided by the media server at the same level as the next level signaling server.
In the technical scheme of the embodiment of the invention, after each level of signaling server receives the first multimedia call request pointing to the called party, if the called party is determined to be affiliated to other signaling server, sending a second multimedia call request including the port multiplexing identification to the media server at the same level as the called party, and receives a multiplexing port returned by the media server of the same level as the self for the second multimedia call request, and sends a third multimedia call request including the multiplexing port to the next-stage signaling server, thereby solving the problems that the audio code stream and the video code stream need to be transmitted through different ports and the occupation rates of the bandwidth and the ports are large among the cross-stage calls in the prior art, realizing that when a plurality of paths of cross-stage calls exist, various audio and video code streams among the cross-levels can share one multiplexing port, so that the utilization rate of the port and the bandwidth is improved.
Optionally, the first receiving module 410 is further configured to: after receiving a first multimedia call request directed to a called party, extracting port information from the first multimedia call request; the port information comprises a non-multiplexing port used for indicating a calling party to receive the multimedia information fed back by the called party and provided by a media server at the same level as the calling party, or comprises a multiplexing port used for indicating a media server at the same level as a previous level signaling server to receive the multimedia information fed back by the called party and provided by a media server at the same level as the calling party.
Optionally, the first receiving module 410 is further configured to: after the signaling server receives a first multimedia call request pointing to a called party, if the called party is determined to be attached to the signaling server, a fourth multimedia call request comprising a port non-multiplexing identifier is sent to a media server at the same level as the signaling server; receiving a non-multiplexing port returned by a media server at the same level as the media server, aiming at a fourth multimedia call request, and sending a fifth multimedia call request comprising the non-multiplexing port to the called party;
the non-multiplexing port is used for indicating the media server at the same level as the non-multiplexing port to receive the multimedia information fed back by the called party.
Optionally, the first receiving module 410 is further configured to: after sending a fifth multimedia call request including the non-multiplexing port to the called party, if a response message returned by the called party for the fifth multimedia call request is received, sending a sixth multimedia call request including a multiplexing port and a port non-multiplexing identifier, which are used for receiving multimedia information, of a media server at the same level as the media server at the upper level signaling server, to the media server at the same level as the media server.
Optionally, the third sending module 430 is further configured to: after sending a third multimedia call request including the multiplexing port to a next-level signaling server of the self, if a response message returned by the next-level signaling server is received and the calling party belongs to the self, sending a seventh multimedia call request including a non-multiplexing port and a port non-multiplexing identifier of the calling party for receiving the multimedia information to a media server at the same level as the self.
Optionally, the first receiving module 410 is further configured to: before a signaling server receives a first multimedia call request pointing to a called party, a subject field is included in a header field of the call request predefined between the signaling server and a media server; the format of the subject field is: SIP: identification of whether a port is multiplexed @ hostname: port number.
The port multiplexing control device provided by the embodiment of the invention can execute the port multiplexing control method applied to the signaling server provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
EXAMPLE five
Fig. 5 is a schematic structural diagram of a port multiplexing control apparatus in a fifth embodiment of the present invention. The embodiment can be applied to the case of multi-path cross-class calling based on SIP flow. As shown in fig. 5, the port multiplexing control apparatus is executed by a media server, and includes:
a call request receiving module 510, configured to receive a multimedia call request sent by a signaling server at the same level as the call request receiving module;
a first port sending module 520, configured to send a multiplexing port corresponding to the multimedia call request to a signaling server at the same level as the first port sending module when the multimedia call request includes the port multiplexing identifier;
a second port sending module 530, configured to send, when the multimedia call request includes the port non-multiplexing identifier, a non-multiplexing port corresponding to the multimedia call request to a signaling server at the same peer as the signaling server.
The technical scheme of the embodiment of the invention is that each level of media server receives a multimedia call request sent by a signaling server at the same level as the level of the media server, when the multimedia call request comprises a port multiplexing identifier, a multiplexing port corresponding to the multimedia call request is sent to the signaling server at the same level as the level of the media server, and when the multimedia call request comprises a port non-multiplexing identifier, a non-multiplexing port corresponding to the multimedia call request is sent to the signaling server at the same level as the level of the media server, thereby solving the problems that audio code streams and video code streams between cross-level calls need to be transmitted through different ports and the bandwidth and the port occupancy rate are larger in the prior art, realizing that various audio and video code streams between cross-levels can share one multiplexing port when multiple cross-level calls exist, and improving the utilization rate of the port and the bandwidth.
The port multiplexing control device provided by the embodiment of the invention can execute the port multiplexing control method applied to the media server provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
EXAMPLE six
Referring to fig. 6, fig. 6 is a schematic structural diagram of a server in six embodiments of the present invention, and as shown in fig. 6, the server may be a signaling server or a media server, and includes a processor 610, a memory 620, an input device 630, and an output device 640; the number of the processors 610 in the server may be one or more, and one processor 610 is taken as an example in fig. 6; the processor 610, the memory 620, the input device 630 and the output device 640 in the server may be connected by a bus or other means, and fig. 6 illustrates an example of a connection by a bus.
The memory 620 serves as a computer-readable storage medium, and may be used for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the port multiplexing control method in the embodiment of the present invention (for example, the first receiving module 410, the second transmitting module 420, and the third transmitting module 430 in the port multiplexing control apparatus, or the call request receiving module 510, the first port transmitting module 520, and the second port transmitting module 530 in another port multiplexing control apparatus). The processor 610 executes various functional applications of the server and data processing by executing software programs, instructions, and modules stored in the memory 620, that is, implements the above-described port multiplexing control method.
The memory 620 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 620 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 620 may further include memory located remotely from the processor 610, which may be connected to a server over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input means 630 may be used to receive a multimedia call request or a corresponding response message and to generate key signal inputs related to user settings and function control of the device. The output device 640 may include a display server such as a display screen.
EXAMPLE seven
An embodiment of the present invention provides a computer-readable storage medium, on which computer instructions are stored, and when the computer instructions are executed by a processor, the method for controlling port multiplexing provided in the foregoing embodiment is implemented, where the method for controlling port multiplexing includes:
a signaling server receives a first multimedia call request pointing to a called party;
if the signaling server determines that the called party is affiliated to other signaling servers, a second multimedia call request comprising a port multiplexing identifier is sent to a media server at the same level as the signaling server;
the signaling server receives a multiplexing port returned by the media server of the same level aiming at the second multimedia call request, and sends a third multimedia call request comprising the multiplexing port to a signaling server of the next level;
the multiplex port is used for indicating the media server at the same level as the multiplex port to receive the multimedia information fed back by the called party and provided by the media server at the same level as the next level signaling server.
Or, another port multiplexing control method includes:
the media server receives a multimedia call request sent by a signaling server at the same level as the media server;
when the multimedia call request includes a port multiplexing identifier, the media server sends a multiplexing port corresponding to the multimedia call request to a signaling server at the same level as the media server;
when the multimedia call request includes the port non-multiplexing identification, the media server sends the non-multiplexing port corresponding to the multimedia call request to the signaling server at the same level as the media server.
Of course, the computer-readable storage medium provided in the embodiments of the present invention may execute the computer instructions to perform the operations of the method not limited to the above, and may also perform the operations related to the port multiplexing control method provided in any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes instructions for enabling a server (which may be a signaling server or a media server) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the port multiplexing control device, each included unit and module are only divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (11)
1. A method for controlling port multiplexing, comprising:
a signaling server receives a first multimedia call request pointing to a called party;
if the signaling server determines that the called party is affiliated to other signaling servers, the signaling server sends a second multimedia call request comprising a port multiplexing identifier to a media server at the same level as the signaling server;
the signaling server receives a multiplexing port returned by the media server at the same level as the signaling server and aiming at the second multimedia call request, and sends a third multimedia call request comprising the multiplexing port to a next signaling server of the signaling server;
the multiplexing port is used for indicating a media server at the same level as the signaling server to receive multimedia information fed back by the called party and provided by a media server at the same level as a next level signaling server of the signaling server through the multiplexing port.
2. The method of claim 1, wherein the signaling server, after receiving the first multimedia call request directed to the called party, further comprises:
the signaling server extracts port information from the first multimedia call request;
the port information includes a non-multiplexing port for indicating a calling party to receive multimedia information fed back by the called party provided by a media server at the same level as the signaling server, or includes a multiplexing port for indicating a media server at the same level as an upper level signaling server of the signaling server to receive multimedia information fed back by the called party provided by a media server at the same level as the signaling server.
3. The method of claim 2, further comprising, after the signaling server receives the first multimedia call request directed to the called party:
if the signaling server determines that the called party belongs to the signaling server, the signaling server sends a fourth multimedia call request including a port non-multiplexing identifier to a media server at the same level as the signaling server;
the signaling server receives a non-multiplexing port returned by a media server at the same level as the signaling server aiming at the fourth multimedia call request, and sends a fifth multimedia call request comprising the non-multiplexing port to the called party;
the non-multiplexing port is used for indicating a media server at the same level as the signaling server to receive the multimedia information fed back by the called party through the non-multiplexing port.
4. The method of claim 3, further comprising, after sending a fifth multimedia call request including the non-multiplexed port to the called party:
and if the signaling server receives a response message returned by the called party aiming at the fifth multimedia call request, the signaling server sends a sixth multimedia call request comprising a multiplexing port for receiving multimedia information and a port non-multiplexing identifier of a media server at the same level as the signaling server at the upper level of the signaling server to the media server at the same level as the signaling server.
5. The method of claim 2, further comprising, after sending a third multimedia call request including the multiplexing port to a next-level signaling server of the mobile terminal, the method further comprising:
and if the signaling server receives a response message returned by the next level signaling server and the calling party belongs to the signaling server, the signaling server sends a seventh multimedia call request comprising a non-multiplexing port and a port non-multiplexing identifier of the calling party for receiving the multimedia information to a media server at the same level as the signaling server.
6. The method of claim 1, further comprising, before the signaling server receives the first multimedia call request directed to the called party:
the signaling server predefines that the head domain of the call request between the signaling server and the media server comprises a subject field; the format of the subject field is as follows: session initiation protocol SIP: identification of whether a port is multiplexed @ hostname: port number.
7. A method for controlling port multiplexing, comprising:
the media server receives a multimedia call request sent by a signaling server at the same level as the media server;
when the multimedia call request comprises a port multiplexing identifier, the media server sends a multiplexing port corresponding to the multimedia call request to a signaling server at the same level as the media server;
when the multimedia call request comprises a port non-multiplexing identifier, the media server sends a non-multiplexing port corresponding to the multimedia call request to a signaling server at the same level as the media server;
when the media server receives a ninth multimedia call request which is sent by a signaling server at the same level as the media server and comprises a port multiplexing identifier during a first call, the media server allocates a multiplexing port on the media server according to the ninth multimedia call request so as to receive multimedia information fed back by a called party and sent by a next-level media server.
8. A port multiplexing control apparatus, performed by a signaling server, comprising:
the first receiving module is used for receiving a first multimedia call request pointing to a called party;
a second sending module, configured to send a second multimedia call request including a port multiplexing identifier to a media server in the same level as the second sending module if it is determined that the called party is affiliated to another signaling server;
a third sending module, configured to receive a multiplexing port returned by a media server at the same level as the third sending module in response to the second multimedia call request, and send a third multimedia call request including the multiplexing port to a next-level signaling server;
the multiplexing port is used for indicating a media server at the same level as the signaling server to receive multimedia information fed back by the called party and provided by a media server at the same level as a next level signaling server of the signaling server through the multiplexing port.
9. A port reuse control apparatus, executed by a media server, comprising:
a call request receiving module, which is used for receiving a multimedia call request sent by a signaling server at the same level as the call request receiving module;
a first port sending module, configured to send a multiplexing port corresponding to the multimedia call request to a signaling server at the same level as the first port sending module when the multimedia call request includes a port multiplexing identifier;
a second port sending module, configured to send a non-multiplexing port corresponding to the multimedia call request to a signaling server at the same level as the second port sending module when the multimedia call request includes a port non-multiplexing identifier;
when the media server receives a ninth multimedia call request which is sent by a signaling server at the same level as the media server and comprises a port multiplexing identifier during a first call, the media server allocates a multiplexing port on the media server according to the ninth multimedia call request so as to receive multimedia information fed back by a called party and sent by a next-level media server.
10. A server comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the port reuse control method according to any one of claims 1-6 or implements the port reuse control method according to claim 7 when executing the program.
11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements a port reuse control method according to any one of claims 1-6, or implements a port reuse control method according to claim 7.
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