CN117729187A - Communication method, apparatus, and computer-readable storage medium - Google Patents
Communication method, apparatus, and computer-readable storage medium Download PDFInfo
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Abstract
The application provides a communication method, device and computer readable storage medium, the communication method comprising: and under the condition that the first terminal supports the simplified communication capability, the first terminal interacts with a first proxy call session control function entity (P-CSCF) through simplified initial session protocol (SIP) information and/or simplified interaction flow, wherein the first P-CSCF and the first terminal belong to a first IMS network. In this way, at least one of latency, power consumption, and traffic consumption in a multimedia service communicated based on the SIP protocol may be reduced.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a communication method, apparatus, and computer readable storage medium.
Background
The IP multimedia subsystem IMS (IP Multimedia Subsystem) is a multimedia control/call control platform over Packet Switched (PS). The IMS is widely used in communication networks such as 4G and 5G as an application subsystem defined by the third generation partnership project (3rd Generation Partnership Project,3GPP), and provides functions such as long term evolution voice bearer (Voice over Long Term Evolution, voLTE) and new air interface voice bearer (Voice over New Radio, voNR) for operators. IMS has become a necessary function for multimedia communication such as voice and video in communication networks such as 4G and 5G, and terminal devices supporting VoLTE/VoNR are very wide.
IMS generally creates, modifies and ends sessions through session initiation protocol (Session Initiation Protocol, SIP), and multimedia services such as voice, video, picture or text can be implemented through sessions. In addition, IMS also supports non-session-like multimedia services.
After the IMS system is introduced into the communication network, the multimedia functions of the corresponding terminal equipment can be enriched. However, for some scenarios, since the terminal device interacts with the IMS system through SIP messages, there are problems of large delay, high power consumption, and large traffic consumption, so that the application of the multimedia service is limited. For example, for a satellite terminal, the communication process itself has the problems of large time delay, high chip power consumption, large traffic consumption and the like, and if a session is created through an SIP message, the problems are more serious; for another example, in the environment such as the open air, the weather is cold, because of inconvenient charging or fast power consumption, if the terminal device still adopts the SIP message to realize the voice or video call, the endurance can be seriously reduced; for another example, for some terminal devices with weak capabilities, such as an internet of things terminal, the multimedia service may not be implemented through the SIP message.
Disclosure of Invention
Embodiments of the present application provide a communication method, apparatus, and computer readable storage medium, so as to reduce at least one of the problems of large delay, high power consumption, and large traffic consumption existing in a multimedia service based on SIP protocol communication.
In order to solve the technical problems, the embodiment of the application is realized as follows:
in a first aspect, a communication method is provided and applied to a first terminal, and the method includes:
and under the condition that the first terminal supports the simplified communication capability, interacting with a first proxy call session control function entity (P-CSCF) through simplified initial session protocol (SIP) information and/or simplified interaction flow, wherein the first P-CSCF is affiliated to the first IMS network.
In a second aspect, a communication method is provided, applied to a first proxy call session control function entity P-CSCF, the method including:
in case it is confirmed that the first terminal supports the reduced communication capability, interacting with the first terminal through reduced initial session protocol, SIP, information and/or reduced interaction procedures, the first terminal being affiliated with the first IMS network.
In a third aspect, there is provided an electronic device comprising: a processor and a memory for storing the processor-executable instructions; wherein the processor is configured to execute the instructions to implement the method according to the first or second aspect.
In a fourth aspect, there is provided a computer readable storage medium, which when executed by a processor of an electronic device, causes the electronic device to perform the method of the first or second aspect.
In the embodiment of the present application, in the case that the first terminal supports the simplified communication capability, the first terminal interacts with the first P-CSCF in the first IMS network through the simplified SIP information and the simplified interaction flow, instead of through the original SIP information and the interaction flow, which reduces the information amount of the single interaction and the total interaction times, so at least one of delay, power consumption and traffic consumption in the multimedia service based on SIP protocol communication can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application.
Fig. 2 is a flow chart of a communication method according to an embodiment of the present application.
Fig. 3 is a detailed flow chart of step 201 of fig. 2.
Fig. 4 is a schematic diagram of another detailed flow of step 201 shown in fig. 2.
Fig. 5 is a schematic diagram of another detailed flow of step 201 shown in fig. 2.
Fig. 6 is a flow chart of a communication method according to another embodiment of the present application.
Fig. 7 is a detailed flow chart of step 601 shown in fig. 6.
Fig. 8 is a schematic diagram of another detailed flow of step 601 shown in fig. 6.
Fig. 9 is a schematic diagram of another detailed flow of step 601 shown in fig. 6.
Fig. 10 is a flowchart of a first embodiment of a communication method according to an embodiment of the present application.
Fig. 11 is a flow chart of a second embodiment of a communication method according to the embodiment of the present application.
Fig. 12 is a flowchart of a third embodiment of a communication method according to an embodiment of the present application.
Fig. 13 is a flowchart of a third embodiment of a communication method according to the present application.
Fig. 14 is a flowchart of a fifth embodiment of a communication method according to the embodiment of the present application.
Fig. 15 is a flowchart of a sixth embodiment of a communication method according to an embodiment of the present application.
Fig. 16 is a flowchart of a specific embodiment seven of a communication method provided in the embodiment of the present application.
Fig. 17 is a flowchart of a specific embodiment eight of a communication method provided in the embodiment of the present application.
Fig. 18 is a flowchart of a specific embodiment nine of a communication method provided in the embodiment of the present application.
Fig. 19 is a schematic structural diagram of a communication device according to an embodiment of the present application.
Fig. 20 is a detailed structural diagram of the interactive module 1901 shown in fig. 19.
Fig. 21 is another detailed structural diagram of the interactive module 1901 shown in fig. 19.
Fig. 22 is a schematic diagram showing another detailed structure of the interactive module 1901 shown in fig. 19.
Fig. 23 is a schematic structural diagram of a communication device according to another embodiment of the present application.
Fig. 24 is a detailed structural schematic diagram of the first interactive module 2301 shown in fig. 23.
Fig. 25 is another detailed structural schematic diagram of the first interactive module 2301 shown in fig. 23.
Fig. 26 is another detailed structural schematic diagram of the first interactive module 2301 shown in fig. 23.
Fig. 27 is a schematic structural diagram of a terminal 2700 according to an embodiment of the present application.
Fig. 28 is a schematic structural diagram of a network device 2800 according to an embodiment of the present application.
Detailed Description
In order to better understand the technical solutions in the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be understood that the technical solution of the embodiments of the present application may be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general packet Radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) system, LTE frequency division duplex (Frequency Division Duplex, FDD) system, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS) or worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication system, 5G system, or New Radio, NR system.
It should be noted that, in describing the specific embodiment, the sequence number of each process does not mean the sequence of execution sequence, and the execution sequence of each process should be determined by the function and the internal logic of each process, and should not constitute any limitation on the implementation process of the embodiment of the present application.
It should also be noted that the terms "first," "second," and the like in the present application and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein. Furthermore, in the present application and in the claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.
In order to solve at least one of the problems of large delay, high power consumption, large traffic consumption and the like in the multimedia service based on the SIP protocol communication, the embodiments of the present application provide a communication method, a device and a computer readable storage medium, which are respectively described below.
The communication method provided by the embodiment of the application can be applied to the communication technical field with limited bandwidth use such as a satellite communication network, an Internet of things and a man-machine communication network, and particularly relates to a scene that information transmission is completed by cooperation of a terminal and network side equipment in the communication field. According to the method and the device, a large amount of information which is originally required to be processed by the terminal is processed by the proxy on the network side, so that high-efficiency transmission of information flows is effectively realized, and bandwidth resources can be greatly saved.
First, a brief description will be given of an architecture of a communication system to which a communication method provided in an embodiment of the present application is applied, with reference to fig. 1. As shown in fig. 1, a communication system provided in an embodiment of the present application may include: terminal (UE) 11, access network 12 and core network 13.
Further, as shown in fig. 1, a core network 13 related to a communication method provided in an embodiment of the present application includes: proxy call session control function (Proxy-Call Session Control Funtion, P-CSCF) 131, access Gateway (AGW) 132, query call session control function (interlineation-Call Session Control Funtion, I-CSCF) 133, serving call session control function (Service-Call Session Control Function, S-CSCF) 134, home subscriber server (Home Subscriber Server, HSS) 135, application server (Application Server, AS) 136, and mapping server (Electronic Numbers to URI Mapping, ENUM)/domain name server (Domain Name System, DNS) 137 for electronic numbers to URIs.
Among these, the P-CSCF131 is also called a session edge controller (Session Border Controller). In satellite networks, the P-CSCF serves as an access module in the IP multimedia subsystem (IP Multimedia System, IMS) responsible for providing access services to "satellite terminals" and the like.
Among the main functions of I-CSCF133 include: assigning a serving call session control function (S-CSCF) to the user at the time of user registration; the service flow is responsible for sending the session to the S-CSCF or designated S-CSCF registered by the user.
Among the main functions of S-CSCF134 include: providing registration and authentication of the terminal device; providing SIP session management including session establishment, session refresh, session release, session maintenance, emergency call management, and message management; and providing a service triggering function to trigger the call to the corresponding VoLTE AS.
The HSS 135 is responsible for storing user authentication information, subscriber specific information, subscriber dynamic information, etc., and is matched with the S-CSCF to complete registration and authentication of the "satellite terminal"; storage service transparent data storage is provided for the AS.
The AS136 is responsible for providing various types of services including, but not limited to, basic supplementary services, call continuity, etc. There is no particular requirement in this application.
The AGW132 is generally referred to as IMS-AGW, and is used for providing functions such as codec conversion of audio and video media, forwarding of audio and video media data, and the like.
As can be seen from fig. 1, the terminal 11 accesses the core network 13 through the access network 12, and after the access, the terminal 11 can interact with the P-CSCF 131 and the AGW132 in the core network 13.
In the communication method provided in the embodiment of the present application, the terminal 11 may be a terminal having a SIP information simplification requirement and/or an interaction flow simplification requirement, and the terminal 11 may include, but is not limited to, one of a satellite terminal, an internet of things terminal, and a man-machine communication terminal. In the case where terminal 11 is a satellite terminal, access network 12 is a satellite access network; in the case where terminal 11 is an internet of things terminal, access network 12 is the internet of things; in the case of a human-machine communication terminal, terminal 11, access network 12 is a human-machine communication network.
A communication method provided in the embodiments of the present application is described below.
In one embodiment, the present application provides a communication method applicable to a first terminal, where the first terminal is affiliated with a first IMS network, as shown in fig. 2, and the method may include the following steps:
in step 201, in case the first terminal supports a reduced communication capability, interacting with a first P-CSCF via reduced initial session protocol (Session Initiation Protocol, SIP) information and/or reduced interaction procedures, wherein the first P-CSCF is affiliated with the first IMS network.
The first terminal may be a terminal with a SIP information simplification requirement and/or an interaction flow simplification requirement. For example, the first terminal may be a satellite terminal, because the communication process of the satellite terminal has the problems of large time delay, high chip power consumption, large traffic consumption and the like, which are more serious if a session is created through an SIP message; for another example, the first terminal may be a terminal more suitable for severe environments, because in environments such as the field and cold weather, the endurance is seriously reduced if the terminal device still adopts SIP message to realize voice or video call due to inconvenient charging or fast power consumption; for another example, the first terminal may be a terminal device with weak capability, such as an internet of things terminal, and may not be capable of implementing the multimedia service through the SIP message. That is, the first terminal may include, but is not limited to, one of a satellite terminal, an internet of things terminal, and a man-machine communication terminal. In addition, in the case that the first terminal is a satellite terminal, the first terminal may access the first IMS network through a satellite network; in the case that the first terminal is an internet of things terminal, the first terminal can access the first IMS network through the internet of things; and when the first terminal is a man-machine communication terminal, the first terminal can access the first IMS network through a man-machine communication network.
In the embodiment of the application, the first terminal accesses the first IMS network to support basic audio and video call. And the method supports the simplification of SIP messages, supports the carrying of the simplifying capability indication during IMS registration, and supports a specific coding and decoding algorithm.
It can be understood that, in the communication method provided in the embodiment of the present application, in the case that the first terminal supports the simplified communication capability, the first terminal interacts with the first P-CSCF in the first IMS network through the simplified SIP information and the simplified interaction flow, instead of through the original SIP information and the interaction flow, so that the amount of information of the single interaction and the total interaction times are reduced, and therefore, at least one of time delay, power consumption and traffic consumption in the multimedia service based on SIP protocol communication can be reduced.
Specifically, compared with the prior art, the communication method provided by the embodiment of the application may have at least one of the following advantages: 1) The existing capability of the first terminal is utilized to the greatest extent, the research and development cost of the first terminal is greatly saved, and the cost can be reduced by more than 70 percent; 2) The bandwidth occupation of the communication between the first terminal and the first IMS network can be reduced by more than 60%, and the utilization rate of the bandwidth is greatly improved; 3) The call connection duration of the first terminal can be reduced by more than 50%, and the use experience of a user is effectively improved; 4) The interoperability of the first terminal can be improved by more than 70%, and the popularization of the first terminal is greatly improved.
Because of the advantages of the communication method provided by the embodiment of the application, the communication method provided by the embodiment of the application has very wide application scenes, for example, the communication method can be applied to application scenes with high requirements on communication delay, power consumption, flow consumption and the like, such as a satellite terminal, an internet of things terminal, a man-machine communication terminal and the like.
In some embodiments, the step 201 may specifically include: the SIP information simplified based on the preset information simplification rule is sent to the first P-CSCF; and/or receiving the SIP information which is sent by the first P-CSCF and is simplified based on the preset information simplification rule.
Specifically, in the communication method provided by the embodiment of the application, in the processes that the first terminal initiates an IMS registration request to the first P-CSCF, the first terminal initiates a session creation request to the first P-CSCF as a session creation request end, and the first terminal receives a session creation request from the first P-CSCF as a session creation response end, the purposes of message simplification and flow simplification are achieved, so that at least one of the problems of large time delay, high power consumption, large flow consumption and the like in a multimedia service based on SIP protocol communication of the first terminal is solved.
As an example, the sending, to the first P-CSCF, SIP information simplified based on a preset information simplification rule may include, but is not limited to, at least one of the following:
1) Sending first simplified SIP information to the first P-CSCF, wherein the first simplified SIP information carries an IMS registration request, and the first simplified information is obtained by simplifying the IMS registration request based on the preset information simplification rule;
2) Sending third simplified SIP information to the first P-CSCF, wherein the third simplified SIP information carries a session creation request for establishing a session with a second terminal, and the third simplified information is obtained by simplifying the session creation request based on the preset information simplification rule;
3) And sending sixth simplified SIP information to the first P-CSCF, wherein the sixth simplified SIP information carries a session creation response to a session creation request initiated by the second terminal, and the sixth simplified information is obtained by simplifying the session creation response based on the preset information simplification rule.
Correspondingly, as an example, the receiving the SIP information simplified based on the preset information simplification rule sent by the first P-CSCF may include, but is not limited to, at least one of the following:
1) Receiving second simplified SIP information sent by the first P-CSCF, wherein the second simplified SIP information is obtained by simplifying an IMS registration response based on the preset information simplification rule, and the IMS registration response is for an IMS registration request initiated by the first terminal;
2) Receiving fourth simplified SIP information sent by the first P-CSCF, wherein the fourth simplified information is obtained by simplifying a session creation response based on the preset information simplification rule, and the session creation response is a session creation request initiated by the first terminal;
3) And receiving fifth simplified SIP information sent by the first P-CSCF, wherein the fifth simplified SIP information is obtained by simplifying a session creation request from a second terminal based on the preset information simplification rule.
Optionally, in the case that the simplified SIP information is multimedia interactive service information, the media codec indication information carried in the simplified SIP information only includes first media codec capability description information supported by the first terminal device, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal. Correspondingly, under the condition that the second terminal does not support the simplified communication capability, the first P-CSCF can add second media coding and decoding capability description information supported by the second terminal in the completed complete SIP information, wherein the second media coding and decoding capability description information comprises a coding and decoding algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW belongs to the first IMS network. In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal.
In the following, in the processes that the first terminal initiates an IMS registration request to the first P-CSCF, the first terminal initiates a session creation request to the first P-CSCF as a session creation request end, and the first terminal receives a session creation request from the first P-CSCF as a session creation response end, details of which messages are simplified one by one are specifically described.
One) IMS registration
In the IMS registration process, as shown in fig. 3, the step 201 may specifically include:
and step 2011, sending first simplified SIP information to the first P-CSCF.
The first simplified SIP information carries an IMS registration request and an indication that the first terminal supports simplified communication capability, the first simplified SIP information is simplified according to a preset information simplification rule, the first P-CSCF is configured to store the simplified communication capability of the first terminal when determining that the first terminal supports simplified communication capability according to the indication, initiate a simplified registration procedure for the first terminal, complement the first simplified SIP information according to a preset information complementation rule to obtain first complete SIP information, interact with other network elements in the first IMS network according to the first complete SIP information to obtain an IMS registration response, and simplify the IMS registration response according to the preset information simplification rule to obtain second simplified SIP information when determining that the IMS registration response is necessary information, where the preset information simplification rule is complementary to the preset information complementation rule.
Optionally, in the case that the IMS registration response is determined to be unnecessary information, the first P-CSCF omits a step of returning simplified information about the IMS registration response to the first terminal, thereby simplifying an IMS registration procedure.
Step 2012, receiving the second simplified SIP information sent by the first P-CSCF.
Through the flow shown in fig. 3, the information amount and the total interaction times of single interaction between the first terminal and the first P-CSCF in the IMS registration process can be reduced, so that at least one of communication delay, power consumption of the first terminal and traffic consumption can be reduced.
Two) Session establishment of Session creation request initiated by first terminal
In the session establishment procedure of the first terminal initiating the session creation request, as shown in fig. 4, the step 201 may further include, in addition to steps 2011 and 2012:
and 2013, sending third simplified SIP information to the first P-CSCF, where the third simplified SIP information carries a session creation request for establishing a session with the second terminal, where the third simplified SIP information is simplified according to the preset information simplification rule, and the first P-CSCF is further configured to start a simplified session creation flow, supplement the third simplified SIP information according to the preset information supplement rule to obtain third complete SIP information, interact with other network elements in the first IMS network according to the third complete SIP information to obtain a session creation response, and simplify the session creation response according to the preset information simplification rule to obtain fourth simplified SIP information when determining that the session creation response is necessary information according to the preset information simplification rule, where the preset information simplification rule is reciprocal to the preset information supplement rule.
Optionally, in the case that the first P-CSCF determines that the session creation response is unnecessary information according to a preset flow simplification rule, a step of returning simplified information about the session creation response to the first terminal may be omitted, and a response message may be directly returned from the first P-CSCF to the next hop network element, thereby simplifying the session establishment flow.
And step 2014, receiving the fourth simplified SIP information sent by the first P-CSCF.
By the process shown in fig. 4, the information amount and total interaction times of single interaction between the first terminal and the first P-CSCF in the session establishment process initiated by the first terminal can be reduced, so that at least one of the problems of communication delay, power consumption of the first terminal, traffic consumption and the like can be reduced.
Optionally, the third simplified SIP information further carries first media codec capability description information, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal. Further, a second media codec capability description information is newly added in the third complete SIP information, where the second media codec capability description information includes a codec algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW is affiliated to the first IMS network. Correspondingly, the session creation response also carries second media coding and decoding capability description information, wherein the second media coding and decoding capability description information comprises a coding and decoding algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW belongs to the first IMS network; the fourth simplified SIP information does not include the second media codec capability description information, that is, the second media codec capability description information in the fourth simplified SIP information is deleted, and only the media codec capability description information specific to the first terminal is reserved. In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal.
Third), the first terminal receives the session establishment of the session creation request
In the session establishment process in which the first terminal receives the session creation request, as shown in fig. 5, the step 201 may further include, in addition to steps 2011 and 2012:
step 2015, receiving fifth simplified SIP information sent by the first P-CSCF, where the fifth simplified SIP information carries a session creation request from the second terminal, and the fifth simplified SIP information is simplified by the first P-CSCF according to the preset information simplification rule.
Step 2016, sending sixth simplified SIP information to the first P-CSCF, where the sixth simplified SIP information carries a session creation response for the session creation request, where the sixth simplified SIP information is simplified according to the preset information simplification rule, and the first P-CSCF is further configured to complement the sixth simplified SIP information according to the preset information complement rule to obtain sixth complete SIP information, and send the sixth complete SIP information to the first serving call session control function entity S-CSCF, so that the first S-CSCF assists in completing session creation, where the preset information simplification rule is complementary to the preset information complement rule, and the first S-CSCF is affiliated to the first IMS network.
By the process shown in fig. 5, in the session establishment process initiated by the second terminal to the first terminal, the information amount and total interaction times of single interaction between the first terminal and the first P-CSCF can be reduced, so that at least one of the problems of communication delay, power consumption of the first terminal, traffic consumption and the like can be reduced.
Optionally, the session creation request further carries second media codec capability description information, where the second media codec capability description information includes a codec algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW is affiliated to the first IMS network; the second media codec capability description information in the fifth simplified SIP information is replaced with first media codec capability description information, wherein the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal.
Correspondingly, the sixth simplified SIP information further carries first media codec capability description information, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal; and a second media coding and decoding capability description information is newly added in the sixth complete SIP information, wherein the second media coding and decoding capability description information comprises a coding and decoding algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW belongs to the first IMS network.
In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal. In addition, the media conversion is moved up to the first P-CSCF, so that the cost of the chip codec conversion in the first terminal can be reduced.
In the above embodiment, the home network of the second terminal is the first IMS network; or the home network of the second terminal is a second IMS network, and the first IMS network and the second IMS network may belong to the same operator or may belong to different operators. Furthermore, the second terminal and the first terminal may be of the same type, for example, both the first terminal and the second terminal may be satellite terminals; the second terminal may also be of a different type than the first terminal, for example the first terminal may be a satellite terminal and the second terminal a regular terminal.
The above embodiments and preset information simplifying rules to be described later are described below. In general, the preset information reduction rules follow the following reduction principles: based on the purpose of establishing and maintaining communication and the non-strong correlation with the terminal session, the message fields and parameters which can be added by the network side can be simplified.
Illustratively, the preset information reduction rule may include, but is not limited to, at least one of:
1) For the rule of simplifying the names of the SIP message fields, for example, the original names of the different SIP message fields are simplified into one character or into a shorter character string relative to the original names, and the characters or character strings corresponding to the simplified original names of the different SIP message fields are different. Table 1 lists some simplified examples of SIP message fields, see table 1 for details. It should be noted that, in practical application, the specific simplification rule may be flexibly adjusted according to the above simplification principle, and is not limited to the simplification manner shown in table 1.
Table 1 simplified rule examples for SIP message field names
2) For simplified rules of SIP parameter values, for example, all or part of the header specifying the SIP parameter value is deleted. Table 2 lists some simplified examples of SIP parameter values, see table 2 in detail. It should be noted that, in practical application, the simplification rule for the SIP parameter value may be flexibly adjusted according to the above simplification principle, and is not limited to the simplification manner shown in table 2.
Table 2 simplified rule examples for SIP parameter values
3) Simplified rules for media negotiation parameters, for example, delete all or part of the specified media negotiation parameter content. Table 3 lists some simplified examples of media negotiation parameters (Session Des cription Protocol, SDP), see table 3 for details. It should be noted that, in practical application, the simplification rule for the media negotiation parameters may be flexibly adjusted according to the above simplification principle, and is not limited to the simplification manner shown in table 3.
Table 3 simplified rule examples for media negotiation parameters
The above embodiments and the preset information complement rules to be described later are described below.
As described above, the preset information complement rule is reciprocal to the preset information reduction rule. Thus, by way of example, the preset information completion rules may include, but are not limited to, at least one of:
1) The completion rule for SIP message field names, for example, complements different SIP message fields to original names. Table 4 lists some complement examples of the SIP message fields, see Table 4 for details.
Table 4 completion rule example for SIP message field names
2) The completion rule for the SIP parameter values, for example, will specify that all or part of the header of the SIP parameter values is completed. Table 5 lists some complementary examples of SIP parameter values, detailed in Table 5.
Table 5 example of completion rules for SIP parameter values
3) The completion rules for the media negotiation parameters, for example, will specify that the media negotiation parameters content be fully or partially completed. Table 6 lists some complementary examples of media negotiation parameters (Session Des cription Protocol, SDP), see table 6 for details.
Table 6 completion rule example for media negotiation parameters
Next, simplified rules of the interaction flow of the first terminal with the first P-CSCF will be explained.
In the simplified interaction flow, the first P-CSCF omits a step of sending unnecessary information to the first terminal, where the unnecessary information satisfies at least one of the following conditions, or the simplified principle of the interaction flow includes at least one of the following: the first terminal is not influenced to carry out media negotiation; the transfer of key information (e.g., telephone number information, etc.) that does not affect the communication by the first terminal; without affecting the delivery of critical instructions (e.g., start call, ring, end call, send message, receive message, etc.) of the first terminal. For example, table 7 shows some simplified rules for determining the interaction flow, please refer to table 7.
Table 7 simplified determination rules for interaction flow
It can be understood that by simplifying the interaction information between the first terminal and the first P-CSCF and simplifying the interaction flow between the first terminal and the first P-CSCF by the above message simplifying rule, part of functions of the first terminal can be moved to the first IMS network side, so that the problems of complex interworking between the first terminal and the first IMS network and high overhead are simplified, the transmission bandwidth of each first terminal is reduced, the user capacity is improved, the chip power consumption and the traffic consumption of the first terminal can be reduced, and the usability of the first terminal is greatly improved.
In another embodiment, the present application further provides a communication method applicable to a first P-CSCF, where the first P-CSCF is affiliated to a first IMS network. As shown in fig. 6, the method may include:
in step 601, in case it is confirmed that the first terminal supports the simplified communication capability, the first terminal interacts with the first terminal through the simplified initial session protocol SIP information and/or the simplified interaction flow, and the first terminal belongs to the first IMS network.
The first terminal may be a terminal with a SIP information simplification requirement and/or an interaction flow simplification requirement. Specifically, the first terminal may include, but is not limited to, one of a satellite terminal, an internet of things terminal, and a man-machine communication terminal.
In the embodiment of the application, the first terminal accesses the first IMS network to support basic audio and video call. And the method supports the simplification of SIP messages, supports the carrying of the simplifying capability indication during IMS registration, and supports a specific coding and decoding algorithm.
It can be appreciated that, in the communication method provided in the embodiments of the present application, since the first P-CSCF and the first terminal may interact through the simplified SIP information and the simplified interaction flow, instead of the original SIP information and the interaction flow, in the case that the first terminal supports the simplified communication capability, the amount of information and the total number of interactions of a single interaction are reduced, so at least one of time delay, power consumption and traffic consumption in a multimedia service based on SIP protocol communication may be reduced.
In some embodiments, the step 601 may specifically include: receiving SIP information which is sent by a first terminal and is simplified based on preset information simplification rules; and/or sending the SIP information simplified based on the preset information simplification rule to the first terminal.
On this basis, the method shown in fig. 6 may further include: complementing the simplified SIP information according to a preset information complementing rule to obtain complete SIP information, wherein the preset message simplifying rule and the preset message complementing rule are mutually inverse; interacting with other network elements in the first IMS network based on the complete SIP information.
Specifically, in the communication method provided by the embodiment of the application, in the processes that the first terminal initiates an IMS registration request to the first P-CSCF, the first terminal initiates a session creation request to the first P-CSCF as a session creation request end, and the first terminal receives a session creation request from the first P-CSCF as a session creation response end, the purposes of message simplification and flow simplification are achieved, so that at least one of the problems of large time delay, high power consumption, large flow consumption and the like in a multimedia service based on SIP protocol communication of the first terminal is solved.
As an example, the receiving the SIP information simplified based on the preset information simplification rule sent by the first terminal may include, but is not limited to, at least one of the following:
1) Receiving first simplified SIP information sent by a first terminal, wherein the first simplified SIP information carries an IMS registration request initiated by the first terminal, and the first simplified information is obtained by simplifying the IMS registration request based on the preset information simplification rule;
2) Receiving third simplified SIP information sent by the first terminal, wherein the third simplified SIP information carries a session creation request for establishing a session with a second terminal, and the third simplified information is obtained by simplifying the session creation request based on the preset information simplification rule;
3) And receiving sixth simplified SIP information sent by the first terminal, wherein the sixth simplified SIP information carries a session creation response to a session creation request initiated by the second terminal, and the sixth simplified information is obtained by simplifying the session creation response based on the preset information simplification rule.
Correspondingly, as an example, the sending, to the first terminal, the SIP information simplified based on the preset information simplification rule may include, but is not limited to, at least one of the following:
1) Under the condition that an IMS registration response to an IMS registration request initiated by the first terminal is determined to be necessary information according to a preset flow simplification rule, second simplified SIP information is sent to the first terminal, wherein the second simplified SIP information is obtained by simplifying the IMS registration response based on the preset information simplification rule;
2) Under the condition that a session creation response to a session creation request initiated by the first terminal is determined to be necessary information according to a preset flow simplification rule, fourth simplified SIP information is sent to the first terminal, wherein the fourth simplified information is obtained by simplifying the session creation response based on the preset information simplification rule;
3) And sending fifth simplified SIP information to the first terminal, wherein the fifth simplified SIP information carries a session creation request from the second terminal, and the fifth simplified SIP information is obtained by simplifying the session creation request based on the preset information simplification rule.
Optionally, in the case that the simplified SIP information is multimedia interactive service information, the media codec indication information carried in the simplified SIP information only includes first media codec capability description information supported by the first terminal device, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal. Correspondingly, under the condition that the second terminal does not support the simplified communication capability, the first P-CSCF can add second media coding and decoding capability description information supported by the second terminal in the completed complete SIP information, wherein the second media coding and decoding capability description information comprises a coding and decoding algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW belongs to the first IMS network. In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal.
In the following, in the processes that the first terminal initiates an IMS registration request to the first P-CSCF, the first terminal initiates a session creation request to the first P-CSCF as a session creation request end, and the first terminal receives a session creation request from the first P-CSCF as a session creation response end, details of which messages are simplified one by one are specifically described.
One) IMS registration
In the IMS registration process, as shown in fig. 7, the step 601 may specifically include:
step 6011, receiving first simplified SIP information sent by the first terminal, where the first simplified SIP information carries an IMS registration request and an indication that the first terminal supports a simplified communication capability, and the first simplified SIP information is simplified according to a preset information simplification rule.
Step 6012, under the condition that the first terminal supports the simplified communication capability according to the indication, saving the simplified communication capability of the first terminal, and starting a simplified registration process for the first terminal.
And 6013, complementing the first simplified SIP information according to a preset information complementing rule to obtain first complete SIP information, wherein the preset information complementing rule is reciprocal to the preset information complementing rule.
And 6014, interacting with other network elements in the first IMS network according to the first complete SIP information to obtain IMS registration response.
For example, according to the first complete SIP information, interacting with a first S-CSCF in the first IMS network, to obtain an IMS registration response.
In step 6015, when the IMS registration response is determined to be necessary information according to the preset flow simplification rule, the IMS registration response is simplified according to the preset information simplification rule to obtain second simplified SIP information.
Optionally, if the IMS registration response is determined to be unnecessary information according to a preset flow simplification rule, corresponding response information is returned to a next hop network element (e.g., a first S-CSCF) of the first IMS network, and a step of sending simplified SIP information about the IMS registration response to the first terminal is omitted.
And step 6016, transmitting the second simplified SIP information to the first terminal.
By the flow shown in fig. 7, the information amount and total interaction times of single interaction between the first P-CSCF and the first terminal in the IMS registration process can be reduced, so that at least one of communication delay, power consumption of the first terminal and traffic consumption can be reduced.
Two) Session establishment of Session creation request initiated by first terminal
In the session establishment procedure in which the first terminal initiates the session creation request, as shown in fig. 8, the above step 601 may further include, in addition to steps 6011 to 6016:
step 6017, receiving third simplified SIP information sent by the first terminal, where the third simplified SIP information carries a session creation request for establishing a session with the second terminal, and the third simplified SIP information is simplified according to the preset information simplification rule.
Step 6018, starting a simplified session creation flow in case it is determined that the first terminal supports a simplified communication capability.
Specifically, whether the first terminal supports the reduced communication capability may be determined according to the reduced communication capability stored when the first terminal registers with the IMS.
And step 6019, complementing the third simplified SIP information according to a preset information complementing rule to obtain third complete SIP information, wherein the preset information complementing rule is reciprocal to the preset information complementing rule.
Optionally, the third simplified SIP information carries first media codec capability description information, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal.
Optionally, second media codec capability description information is added to the third complete SIP information, where the second media codec capability description information includes a codec algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW is affiliated to the first IMS network. In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal.
And step 6020, interacting with other network elements in the first IMS network according to the third complete SIP information to obtain a session creation response.
For example, according to the third complete SIP information, interacting with a first S-CSCF in the first IMS network, to obtain a session creation response.
Step 6021, in the case that the session creation response is determined to be necessary information according to the preset flow simplification rule, simplifying the session creation response according to the preset information simplification rule, to obtain fourth simplified SIP information.
Optionally, in the case that the session creation response is determined to be unnecessary information according to a preset flow simplification rule, corresponding response information is returned to a next hop network element (such as a first S-CSCF) of the first IMS network, and a step of sending simplified SIP information about the session creation response to the first terminal is omitted.
Step 6022, transmitting the fourth simplified SIP information to the first terminal.
By the process shown in fig. 8, the information amount and total interaction times of single interaction between the first P-CSCF and the first terminal in the session establishment process initiated by the first terminal can be reduced, so that at least one of the problems of communication delay, power consumption of the first terminal, traffic consumption and the like can be reduced.
Optionally, the session creation response carries second media codec capability description information, where the second media codec capability description information includes a codec algorithm supported by the second terminal and media address information of the second terminal. Correspondingly, deleting the second media coding and decoding capability description information in the fourth simplified SIP information. In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal.
Third), the first terminal receives the session establishment of the session creation request
In the session establishment procedure in which the first terminal receives the session creation request, as shown in fig. 9, the above-mentioned step 601 may further include, in addition to steps 6011 to 6016:
step 6023, sending fifth simplified SIP information to the first terminal, where the fifth simplified SIP information carries a session creation request from the second terminal, and the fifth simplified SIP information is simplified by the first P-CSCF according to the preset information simplification rule.
Optionally, the session creation request further carries second media codec capability description information, where the second media codec capability description information includes a codec algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW is affiliated to the first IMS network. Optionally, the second media codec capability description information in the fifth simplified SIP information is replaced with first media codec capability description information, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal. In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal. In addition, the media conversion is moved up to the first P-CSCF, so that the cost of the chip codec conversion in the first terminal can be reduced.
Step 6024, receiving sixth simplified SIP information sent by the first terminal, where the sixth simplified SIP information carries a session creation response to the session creation request, and the sixth simplified SIP information is simplified according to the preset information simplification rule.
And step 6025, complementing the sixth simplified SIP information according to a preset information complementing rule to obtain sixth complete SIP information, wherein the preset information complementing rule is reciprocal to the preset information complementing rule.
Step 6026, the sixth complete SIP information is sent to a first serving call session control function entity S-CSCF, so that the first S-CSCF assists in completing session creation, where the first S-CSCF belongs to the first IMS network.
By the process shown in fig. 9, in the session establishment process initiated by the second terminal to the first terminal, the information amount and total interaction times of single interaction between the first P-CSCF and the first terminal can be reduced, so that at least one of the problems of communication delay, power consumption of the first terminal, traffic consumption and the like can be reduced.
Optionally, the sixth simplified SIP information further carries first media codec capability description information, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal. Optionally, second media codec capability description information is added to the sixth complete SIP information, where the second media codec capability description information includes a codec algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW is affiliated to the first IMS network. In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal. In addition, the media conversion is moved up to the first P-CSCF, so that the cost of the chip codec conversion in the first terminal can be reduced.
In the above embodiment, the home network of the second terminal is the first IMS network; or the home network of the second terminal is a second IMS network, and the first IMS network and the second IMS network may belong to the same operator or may belong to different operators.
Furthermore, the second terminal and the first terminal may be of the same type, for example, both the first terminal and the second terminal may be satellite terminals; the second terminal may also be of a different type than the first terminal, for example the first terminal may be a satellite terminal and the second terminal a regular terminal.
The above embodiments and preset information simplifying rules to be described later are described below.
In general, the preset information reduction rules follow the following reduction principles: based on the purpose of establishing and maintaining communication and the non-strong correlation with the terminal session, the message fields and parameters which can be added by the network side can be simplified.
Illustratively, the preset information reduction rule may include, but is not limited to, at least one of:
1) For the rule of simplifying the names of the SIP message fields, for example, the original names of the different SIP message fields are simplified into one character or into a shorter character string relative to the original names, and the characters or character strings corresponding to the simplified original names of the different SIP message fields are different.
2) For simplified rules of SIP parameter values, for example, all or part of the header specifying the SIP parameter value is deleted.
3) Simplified rules for media negotiation parameters, for example, delete all or part of the specified media negotiation parameter content.
In the simplified interaction flow, the first P-CSCF omits a step of sending unnecessary information to the first terminal, where the unnecessary information satisfies at least one of the following conditions, or the simplified principle of the interaction flow includes at least one of the following: the first terminal is not influenced to carry out media negotiation; the transfer of key information (e.g., telephone number information, etc.) that does not affect the communication by the first terminal; without affecting the delivery of critical instructions (e.g., start call, ring, end call, send message, receive message, etc.) of the first terminal.
The foregoing description of a communication method provided by the present application is from the first terminal side and the first P-CSCF side, respectively, and a specific application of the communication method provided by the present application is illustrated by several specific embodiments below.
Example 1: first terminal registration IMS
In this embodiment, the first terminal is taken as the satellite terminal 81 as an example, and the interaction flow between the first terminal and the relevant network element in the first IMS network 82 in the IMS registration process is described.
As shown in fig. 10, the procedure for registering the IMS with the first P-CSCF 821 by the satellite terminal 81 includes:
in step 1001, the satellite terminal 81 sends a primary registration request (REGISTER) for IMS to the first P-CSCF 821, where the primary registration request carries an indication that the satellite terminal 81 supports simplified communication capabilities, and the primary registration request is simplified by the satellite terminal 81 according to a preset information simplification rule.
In step 1002, the first P-CSCF 821 receives the primary registration request, and in case it is confirmed that the primary registration request carries an indication that the satellite terminal 81 supports the simplified communication capability, the primary registration request is completed according to the preset information completion rule, so as to obtain a primary registration request including complete information, and the satellite terminal 81 supports the simplified communication capability in the local record.
The first P-CSCF 821 forwards a one-time registration request (REGISTER) containing complete information to the first I-CSCF 822, step 1003.
In step 1004, the first I-CSCF 822 interacts with the first HSS 825 to obtain corresponding first S-CSCF 823 information.
In step 1005, the first I-CSCF 822 forwards a one-time registration request containing the complete information to the first S-CSCF 823.
In step 1006, the first S-CSCF 823 interacts with the first HSS 825 to obtain authentication information of the user corresponding to the satellite terminal 81, where the first HSS 825 is a user server to which the satellite terminal 81 belongs.
In step 1007, the first S-CSCF 823 sends a one-time registration response to the first I-CSCF 822, where the one-time registration response carries authentication information of the user corresponding to the satellite terminal 81, and the one-time registration response may specifically include the status code 401.
The first I-CSCF 822 forwards a registration response to the first P-CSCF 821, step 1008.
In step 1009, the first P-CSCF 821 again determines that the satellite terminal 81 supports the simplified communication capability, and simplifies the primary registration response according to the preset information simplification rule, so as to obtain a simplified primary registration response.
The first P-CSCF 821 sends the reduced one-time registration response to the satellite terminal 81, step 1010.
In step 1011, the satellite terminal 81 sends a secondary registration request (REGISTER) about IMS to the first P-CSCF 821, where the secondary registration request carries authentication information of a user corresponding to the satellite terminal 81 and an indication that the satellite terminal 81 supports simplified communication capability, and the secondary registration request is simplified by the satellite terminal 81 according to a preset information simplification rule.
In step 1012, the first P-CSCF 821 completes the secondary registration request according to the preset information completion rule to obtain a completed secondary registration request, and records that the satellite terminal 81 supports the simplified communication capability locally, if it is determined that the secondary registration request carries an indication that the satellite terminal 81 supports the simplified communication capability.
The first P-CSCF 821 forwards the completed secondary registration request to the first I-CSCF 822, step 1013.
In step 1014, the first I-CSCF 822 interacts with the first HSS 825 to obtain first S-CSCF 823 information corresponding to the satellite terminal 81.
The first I-CSCF 822 forwards the completed secondary registration request to the first S-CSCF 823, step 1015.
Step 1016, the first S-CSCF 823 verifies the authentication information of the user corresponding to the satellite terminal 81, and after the authentication is passed, interacts with the first HSS 825 to store the association relationship between the user and the first S-CSCF 823 in the first HSS 825.
The first S-CSCF 823 sends 1017 a secondary registration response to the first I-CSCF 822, which may include the status code 200.
The first I-CSCF 822 forwards the secondary registration response to the first P-CSCF 821, step 1018.
In step 1019, the first P-CSCF 821, when determining that the satellite terminal 81 supports the simplified communication capability, simplifies the secondary registration response according to the preset information simplification rule, so as to obtain a simplified secondary registration response.
In step 1020, the first P-CSCF 821 transmits the reduced secondary registration response to the satellite terminal 81.
In step 1021, the first S-CSCF 823 sends a third party registration request (REGISTER) to the first AS824.
At step 1022, the first AS824 returns a registration response, which may include the status code 200, to the first S-CSCF 823.
To this end, the satellite terminal 81 completes the initial registration of the IMS domain.
It can be seen that in the above-described IMS domain registration procedure, the first terminal 81 interacts with the first P-CSCF 821 through the simplified SIP information, which reduces the amount of interaction information between the two, and thus at least one of communication delay, power consumption, and traffic consumption can be reduced.
Example 2
As shown in fig. 11, in this embodiment, it is assumed that the first terminal 81 is a satellite terminal, the second terminal 91 is a normal terminal, the first terminal 81 initiates a session establishment request, the first terminal 81 and the second terminal 91 belong to two terminals under different IMS networks of the same operator, the first terminal 81 accesses the first IMS network 82 through a satellite, and the second terminal 91 accesses the second IMS network 92 through 4G/5G.
The first IMS network 82 includes: a first P-CSCF 821, a first IMS-AGW 826, a first S-CSCF 823, a first AS824, and a first ENUM/DNS825.
The second IMS network 92 includes: a second P-CSCF 922, a second IMS-AGW 921, a second S-CSCF 923, a second AS 924, a second HSS 925, and a second I-CSCF 926.
It should be noted that, the session establishment flow of the satellite terminal and the common terminal in the same IMS network of the same operator is identical to the flow shown in fig. 11, and will not be described again.
As shown in fig. 11, the session establishment procedure in which the first terminal 81 initiates the session creation request may include:
in step 1201, the first terminal 81 initiates a session creation request (INVITE) to the first P-CSCF 821, wherein the session creation request is simplified according to a preset information simplification rule.
Step 1202, after receiving the session creation request, the first P-CSCF 821 determines that the first terminal 81 supports the simplified communication capability according to the registration information of the first terminal 81, applies for second media codec capability description information (including transcoding resources) to the first IMS-AGW 826, complements the session creation request according to a preset information complementing rule, obtains a complemented session creation request, and adds the second media codec capability description information to the complemented session creation request, where the second media codec capability description information includes a codec algorithm supported by the second terminal 91 and media address information of the first IMS-AGW 826.
At step 1203, the first P-CSCF 821 sends a completed session creation request to the first S-CSCF 823.
In step 1204, the first S-CSCF 823 sends the completed session creation request to the first AS 824 according to the user subscription information corresponding to the first terminal 81.
In step 1205, the first AS 824 executes corresponding service logic according to the subscription information of the user, and forwards the completed session creation request to the first S-CSCF 823.
In step 1206, first S-CSCF 823 interacts with first ENUM/DNS 825 to obtain information for second I-CSCF 926.
The first S-CSCF 823 sends the completed session creation request to the second I-CSCF 926, step 1207.
In step 1208, the second I-CSCF 926 interacts with the second HSS 925 to obtain a second S-CSCF 923 where the second terminal 91 is located.
The second I-CSCF 926 sends the completed session creation request to the second S-CSCF 923, step 1209.
In step 1210, the second S-CSCF 923 forwards the completed session creation request to the second AS 924 according to the user subscription information.
In step 1211, the second AS 924 forwards the completed session creation request to the second S-CSCF 923 after executing the corresponding service logic according to the user subscription information.
The second S-CSCF 923 sends the completed session creation request to the second P-CSCF 922, step 1212.
In step 1213, the second P-CSCF 922 determines that the second terminal 91 does not support the reduced communication capability according to the registration information of the second terminal 91, and interacts with the second IMS-AGW 921 to apply for the codec capability of the normal terminal, and adds the codec capability to the completed session creation request.
The second P-CSCF 922 sends the completed session creation request to the second terminal 91, step 1214.
The second terminal 91 returns a session creation response to the second P-CSCF 922, which is complete and not simplified, step 1215.
In step 1216, the second P-CSCF 922 determines that the second terminal 91 does not support the reduced communication capability according to the registration information of the second terminal 91, does not perform the information complementing operation, and sends a complete session creation response to the second S-CSCF 923.
In step 1217, the second S-CSCF 923 forwards the complete session creation response to the second AS 924 according to the routing information in the complete session creation response.
In step 1218, the second AS 924 forwards the complete session creation response to the second S-CSCF 923.
The second S-CSCF 923 forwards the complete session creation response to the second I-CSCF 926 according to the routing information in the complete session creation response, step 1219.
The second I-CSCF 926 forwards the complete session creation response to the first S-CSCF 823, step 1220.
The first S-CSCF 823 forwards the complete session creation response to the first AS 824, step 1221.
In step 1222, the first AS 824 forwards the complete session creation response to the first S-CSCF 823.
The first S-CSCF 823 forwards the complete session creation response to the first P-CSCF 821, step 1223.
In step 1224, the first P-CSCF 821 determines, according to the registration information of the first terminal 81, that the first terminal 81 supports the simplified communication capability, interacts with the first IMS-AGW 826 to complete media information update (delete the second media codec capability description information), applies for media transcoding, and simplifies the session creation response according to the preset information simplification rule, so as to obtain a simplified session creation response, where the simplified session creation response only carries the codec algorithm specific to the first terminal 81.
The first P-CSCF 821 forwards the reduced session creation response to the first terminal 81, step 1225.
Thus far, the interaction procedure is completed once, the subsequent message interactions follow the above principle, the first terminal 81 simplifies the message sent to the first P-CSCF 821, the first P-CSCF 821 complements the message from the first terminal 81 before sending it to the next hop network element, the first P-CSCF 821 simplifies the message returned to the first terminal 81, etc. In this way, the amount of interaction information of the first terminal 81 with the first P-CSCF 821 can be reduced, thereby reducing at least one of communication latency, power consumption, and traffic consumption.
Example 3
As shown in fig. 12, in this embodiment, it is assumed that the first terminal 81 and the second terminal 91 are both satellite terminals, the first terminal 81 initiates a session establishment request, the first terminal 81 and the second terminal 91 belong to two satellite terminals under different IMS networks of the same operator, the first terminal 81 accesses the first IMS network 82 through a satellite, and the second terminal 91 accesses the second IMS network 92 through a satellite.
The first IMS network 82 includes: a first P-CSCF 821, a first IMS-AGW 826, a first S-CSCF 823, a first AS 824, and a first ENUM/DNS825.
The second IMS network 92 includes: a second P-CSCF 922, a second IMS-AGW 921, a second S-CSCF 923, a second AS 924, a second HSS 925, and a second I-CSCF 926.
It should be noted that, the session establishment flow of the satellite terminal and the satellite terminal under the same IMS network of the same operator is identical to the flow shown in fig. 12, and will not be described again.
As shown in fig. 12, the session establishment procedure in which the first terminal 81 initiates the session creation request may include:
in step 1301, the first terminal 81 initiates a session creation request (INVITE) to the first P-CSCF 821, wherein the session creation request is simplified according to a preset information simplification rule.
In step 1302, after receiving the session creation request, the first P-CSCF 821 determines that the first terminal 81 supports the simplified communication capability according to the registration information of the first terminal 81, applies for second media codec capability description information (including transcoding resources) to the first IMS-AGW 826, complements the session creation request according to a preset information complementing rule, obtains a complemented session creation request, and adds the second media codec capability description information to the complemented session creation request, where the second media codec capability description information includes the codec algorithm supported by the second terminal 91 and the media address information of the first IMS-AGW 826.
The first P-CSCF 821 sends a completed session creation request to the first S-CSCF 823, step 1303.
In step 1304, the first S-CSCF 823 sends the completed session creation request to the first AS 824 according to the subscription information of the user corresponding to the first terminal 81.
In step 1305, the first AS 824 executes corresponding service logic according to the subscription information of the user, and forwards the completed session creation request to the first S-CSCF 823.
In step 1306, the first S-CSCF 823 interacts with the first ENUM/DNS 825 to obtain information for the second I-CSCF 926.
The first S-CSCF 823 sends a completed session creation request to the second I-CSCF 926, step 1307.
In step 1308, the second I-CSCF 926 interacts with the second HSS 925 to obtain a second S-CSCF 923 where the second terminal 91 is located.
In step 1309, the second I-CSCF 926 sends the completed session creation request to the second S-CSCF 923.
In step 1310, the second S-CSCF 923 forwards the completed session creation request to the second AS 924 according to the user subscription information.
In step 1311, the second AS 924 executes corresponding service logic according to the subscription information of the user, and forwards the completed session creation request to the second S-CSCF 923.
The second S-CSCF 923 sends the completed session creation request to the second P-CSCF 922, step 1312.
In step 1313, the second P-CSCF 922 determines that the second terminal 91 supports the simplified communication capability according to the registration information of the second terminal 91, applies for satellite codec capability by interacting with the second IMS-AGW 921, and simplifies the completed session creation request according to the preset information simplification rule, so as to obtain a simplified session creation request, where the simplified session creation request only carries the satellite codec capability.
The second P-CSCF 922 sends the reduced session creation request to the second terminal 91, step 1314.
In step 1315, the second terminal 91 returns a reduced session creation response to the second P-CSCF 922.
In step 1316, the second P-CSCF 922 determines that the second terminal 91 supports the simplified communication capability according to the registration information of the second terminal 91, complements the simplified session creation response according to the preset information complementing rule, obtains a complemented session creation response, and sends the complemented session creation response to the second S-CSCF 923.
In step 1317, the second S-CSCF 923 forwards the complete session creation response to the second AS 924 according to the routing information in the completed session creation response.
In step 1318, the second AS 924 forwards the completed session creation response to the second S-CSCF 923.
In step 1319, the second S-CSCF 923 forwards the complete session creation response to the second I-CSCF 926 according to the routing information in the complete session creation response.
The second I-CSCF 926 forwards the complete session creation response to the first S-CSCF 823, step 1320.
The first S-CSCF 823 forwards the complete session creation response to the first AS 824, step 1321.
At step 1322, the first AS 824 forwards the complete session creation response to the first S-CSCF 823.
The first S-CSCF 823 forwards the complete session creation response to the first P-CSCF 821, step 1323.
In step 1324, the first P-CSCF 821 determines, according to the registration information of the first terminal 81, that the first terminal 81 supports the simplified communication capability, and simplifies the completed session creation response to obtain a simplified session creation response, where the simplified session creation response only carries a codec algorithm specific to the satellite terminal.
The first P-CSCF 821 forwards the reduced session creation response to the first terminal 81, step 1325.
Thus, the first terminal 81 completes an interaction process, the subsequent message interaction follows the principle described above, the first terminal 81 simplifies the message sent to the first P-CSCF 821, the first P-CSCF 821 completes the message from the first terminal 81 before sending the message to the next hop network element, and the first P-CSCF 821 simplifies the message returned to the first terminal 81; and the second terminal 91 simplifies the message sent to the second P-CSCF 922, the second P-CSCF 922 complements the message from the second terminal 91 before sending it to the next hop network element, the second P-CSCF 922 simplifies the message returned to the second terminal 91, etc. In this way, the amount of interaction between the first terminal 81 and the first P-CSCF 821 and the amount of interaction between the second terminal 91 and the second P-CSCF 922 can be reduced, thereby reducing at least one of communication latency, power consumption, and traffic consumption of the first terminal 81 and the second terminal 91.
Example 4
As shown in fig. 13, in this embodiment, it is assumed that the first terminal 81 is a satellite terminal, the second terminal 91 is a normal terminal, the first terminal 81 initiates a session establishment request, the first terminal 81 and the second terminal 91 belong to two terminals under different IMS networks of different operators, the first terminal 81 accesses the first IMS network 82 through a satellite, and the second terminal 91 accesses the second IMS network 92 through 4G/5G.
The first IMS network 82 includes: a first P-CSCF 821, a first IMS-AGW 826, a first S-CSCF 823, a first AS 824, a first ENUM/DNS 825, a first interworking border control function (Interconnection Border Control Function, IBCF) 827 and a first translation gateway (Translation Gateway, trGW) 828.
The second IMS network 92 includes: a second P-CSCF 922, a second IMS-AGW 921, a second S-CSCF 923, a second AS 924, a second HSS 925, a second I-CSCF 926, a second IBCF927 and a second TrGW 928.
As shown in fig. 13, the session establishment procedure in which the first terminal 81 initiates the session creation request may include:
in step 1401, the first terminal 81 initiates a session creation request (INVITE) to the first P-CSCF 821, wherein the session creation request is simplified according to a preset information simplification rule.
Step 1402, after receiving the session creation request, the first P-CSCF 821 determines that the first terminal 81 supports the simplified communication capability according to the registration information of the first terminal 81, applies for second media codec capability description information (including transcoding resources) to the first IMS-AGW 826, complements the session creation request according to a preset information complementing rule, obtains a complemented session creation request, and adds the second media codec capability description information to the complemented session creation request, where the second media codec capability description information includes a codec algorithm supported by the second terminal 91 and media address information of the first IMS-AGW 826.
The first P-CSCF 821 sends a completed session creation request to the first S-CSCF 823, step 1403.
In step 1404, the first S-CSCF 823 sends the completed session creation request to the first AS 824 according to the subscription information of the user corresponding to the first terminal 81.
In step 1405, the first AS 824 executes corresponding service logic according to the subscription information of the user, and forwards the completed session creation request to the first S-CSCF 823.
In step 1406, the first S-CSCF 823 interacts with the first ENUM/DNS 825 to obtain information for the first IBCF 827.
In step 1407, the first S-CSCF 823 sends the completed session creation request to the first IBCF 827.
In step 1408, the first IBCF 827 forwards a completed session creation request to the second IBCF 927.
In step 1409, the second IBCF 927 forwards the completed session creation request to the second I-CSCF 926.
In step 1410, the second I-CSCF 926 interacts with the second HSS 925 to obtain a second S-CSCF 923 where the second terminal 91 is located.
In step 1411, the second I-CSCF 926 sends the completed session creation request to the second S-CSCF 923.
In step 1412, the second S-CSCF 923 forwards the completed session creation request to the second AS 924 according to the user subscription information.
In step 1413, the second AS 924 executes corresponding service logic according to the subscription information, and forwards the completed session creation request to the second S-CSCF 923.
The second S-CSCF 923 sends the completed session creation request to the second P-CSCF 922, step 1414.
In steps 1415 and 1416, the second P-CSCF 922 determines that the second terminal 91 does not support the reduced communication capability according to the registration information of the second terminal 91, and interacts with the second IMS-AGW 921 to apply for the codec capability of the normal terminal, and adds the codec capability to the completed session creation request.
The second P-CSCF 922 sends a completed session creation request to the second terminal 91, step 1417.
In step 1418, the second terminal 91 returns a session creation response to the second P-CSCF 922, which is complete and not simplified.
In step 1419, the second P-CSCF 922 determines that the second terminal 91 does not support the reduced communication capability according to the registration information of the second terminal 91, does not perform the information complementing operation, and sends a complete session creation response to the second S-CSCF 923.
In step 1420, the second S-CSCF 923 forwards the complete session creation response to the second AS 924 according to the routing information in the complete session creation response.
In step 1421, the second AS 924 forwards the complete session creation response to the second S-CSCF 923.
In step 1422, the second S-CSCF 923 forwards the complete session creation response to the second I-CSCF 926 according to the routing information in the complete session creation response.
The second I-CSCF 926 forwards the complete session creation response to the second IBCF 927, step 1423.
In step 1424, the second IBCF 927 forwards the complete session creation response to the first IBCF 827.
In step 1425, the first IBCF 827 forwards the complete session creation response to the first S-CSCF 823.
In step 1426, the first S-CSCF 823 forwards the complete session creation response to the first AS 824.
In step 1427, the first AS 824 forwards the complete session creation response to the first S-CSCF 823.
The first S-CSCF 823 forwards the complete session creation response to the first P-CSCF 821, step 1428.
In step 1429, the first P-CSCF 821 determines that the first terminal 81 supports simplified communication capability according to the registration information of the first terminal 81, interacts with the first IMS-AGW 826 to complete media information update (delete the second media codec capability description information), applies for media transcoding, and simplifies the session creation response according to the preset information simplification rule, thereby obtaining a simplified session creation response, where the simplified session creation response only carries the codec algorithm specific to the first terminal 81.
In step 1430, the first P-CSCF 821 forwards the reduced session creation response to the first terminal 81.
Thus far, the interaction procedure is completed once, the subsequent message interactions follow the above principle, the first terminal 81 simplifies the message sent to the first P-CSCF 821, the first P-CSCF 821 complements the message from the first terminal 81 before sending it to the next hop network element, the first P-CSCF 821 simplifies the message returned to the first terminal 81, etc. In this way, the amount of interaction information of the first terminal 81 with the first P-CSCF 821 can be reduced, thereby reducing at least one of communication latency, power consumption, and traffic consumption.
Example 5
As shown in fig. 14, in this embodiment, it is assumed that the first terminal 81 and the second terminal 91 are both satellite terminals, the first terminal 81 initiates a session establishment request, the first terminal 81 and the second terminal 91 belong to two satellite terminals under different IMS networks of different operators, the first terminal 81 accesses the first IMS network 82 through a satellite, and the second terminal 91 accesses the second IMS network 92 through a satellite.
The first IMS network 82 includes: a first P-CSCF 821, a first IMS-AGW 826, a first S-CSCF 823, a first AS 824, a first ENUM/DNS 825, a first interworking border control function (Interconnection Border Control Function, IBCF) 827 and a first translation gateway (Translation Gateway, trGW) 828. The second IMS network 92 includes: a second P-CSCF 922, a second IMS-AGW 921, a second S-CSCF 923, a second AS 924, a second HSS 925, a second I-CSCF 926, a second IBCF927 and a second TrGW 928.
As shown in fig. 14, the session establishment procedure in which the first terminal 81 initiates the session creation request may include:
in step 1501, the first terminal 81 initiates a session creation request (INVITE) to the first P-CSCF 821, wherein the session creation request is simplified according to a preset information simplification rule.
In step 1502, after receiving the session creation request, the first P-CSCF 821 determines that the first terminal 81 supports the simplified communication capability according to the registration information of the first terminal 81, applies for second media codec capability description information (including transcoding resources) to the first IMS-AGW 826, complements the session creation request according to a preset information complementing rule, obtains a complemented session creation request, and adds the second media codec capability description information to the complemented session creation request, where the second media codec capability description information includes the codec algorithm supported by the second terminal 91 and the media address information of the first IMS-AGW 826.
In step 1503, the first P-CSCF 821 sends a completed session creation request to the first S-CSCF 823.
In step 1504, the first S-CSCF 823 sends the completed session creation request to the first AS 824 according to the user subscription information corresponding to the first terminal 81.
In step 1505, the first AS 824 executes corresponding service logic according to the subscription information of the user, and forwards the completed session creation request to the first S-CSCF 823.
In step 1506, the first S-CSCF 823 interacts with the first ENUM/DNS 825 to obtain information of the second I-CSCF 926.
In step 1507, the first S-CSCF 823 sends a completed session creation request to the first IBCF 827.
In step 1508, the first IBCF 827 forwards a completed session creation request to the second IBCF 927.
In step 1509, the second IBCF 927 forwards the completed session creation request to the second I-CSCF 926.
In step 1510, the second I-CSCF 926 interacts with the second HSS 925 to obtain a second S-CSCF 923 where the second terminal 91 is located.
In step 15011, the second I-CSCF 926 sends the completed session creation request to the second S-CSCF 923.
In step 1512, the second S-CSCF 923 forwards the completed session creation request to the second AS 924 according to the user subscription information.
In step 1513, the second AS 924 executes corresponding service logic according to the user subscription information, and forwards the completed session creation request to the second S-CSCF 923.
The second S-CSCF 923 sends the completed session creation request to the second P-CSCF 922, step 1514.
In step 1515 and step 1516, the second P-CSCF 922 determines that the second terminal 91 supports the simplified communication capability according to the registration information of the second terminal 91, interacts with the second IMS-AGW 921 to apply for satellite codec capability, and simplifies the completed session creation request according to the preset information simplification rule, so as to obtain a simplified session creation request, where the simplified session creation request only carries satellite codec capability.
The second P-CSCF 922 sends the simplified session creation request to the second terminal 91, step 1517.
The second terminal 91 returns a reduced session creation response to the second P-CSCF 922, step 1518.
In step 1519, the second P-CSCF 922 determines that the second terminal 91 supports the simplified communication capability according to the registration information of the second terminal 91, complements the simplified session creation response according to the preset information complementing rule, obtains a complemented session creation response, and sends the complemented session creation response to the second S-CSCF 923.
In step 1520, the second S-CSCF 923 forwards the complete session creation response to the second AS 924 according to the routing information in the completed session creation response.
In step 1521, the second AS 924 forwards the completed session creation response to the second S-CSCF 923.
In step 1522, the second S-CSCF 923 forwards the complete session creation response to the second I-CSCF 926 according to the routing information in the complete session creation response.
The second I-CSCF 926 forwards the complete session creation response to the second IBCF 927, step 1523.
In step 1524, the second IBCF 927 forwards the complete session creation response to the first IBCF 827.
At step 1525, the first IBCF 827 forwards the complete session creation response to the first S-CSCF 823.
At step 1526, the first S-CSCF 823 forwards the complete session creation response to the first AS 824.
At step 1527, the first AS 824 forwards the complete session creation response to the first S-CSCF 823.
The first S-CSCF 823 forwards the complete session creation response to the first P-CSCF 821, step 1528.
In step 1529, the first P-CSCF 821 determines, according to the registration information of the first terminal 81, that the first terminal 81 supports the simplified communication capability, and simplifies the completed session creation response to obtain a simplified session creation response, where the simplified session creation response only carries a codec algorithm specific to the satellite terminal.
The first P-CSCF 821 forwards the reduced session creation response to the first terminal 81, step 1530.
Thus, the first terminal 81 completes an interaction process, the subsequent message interaction follows the principle described above, the first terminal 81 simplifies the message sent to the first P-CSCF 821, the first P-CSCF 821 completes the message from the first terminal 81 before sending the message to the next hop network element, and the first P-CSCF 821 simplifies the message returned to the first terminal 81; and the second terminal 91 simplifies the message sent to the second P-CSCF 922, the second P-CSCF 922 complements the message from the second terminal 91 before sending it to the next hop network element, the second P-CSCF 922 simplifies the message returned to the second terminal 91, etc. In this way, the amount of interaction between the first terminal 81 and the first P-CSCF 821 and the amount of interaction between the second terminal 91 and the second P-CSCF 922 can be reduced, thereby reducing at least one of communication latency, power consumption, and traffic consumption of the first terminal 81 and the second terminal 91.
Example 6
As shown in fig. 15, in this embodiment, it is assumed that the first terminal 81 is a normal terminal, the second terminal 91 is a satellite terminal, the first terminal 81 initiates a session establishment request, the first terminal 81 and the second terminal 91 belong to two terminals under different IMS networks of the same operator, the first terminal 81 accesses the first IMS network 82 through 4G/5G, and the second terminal 91 accesses the second IMS network 92 through a satellite.
The first IMS network 82 includes: a first P-CSCF 821, a first IMS-AGW 826, a first S-CSCF 823, a first AS 824, and a first ENUM/DNS825. The second IMS network 92 includes: a second P-CSCF 922, a second IMS-AGW 921, a second S-CSCF 923, a second AS 924, a second HSS 925, and a second I-CSCF 926.
It should be noted that, the session establishment flow of the common terminal and the satellite terminal in the same IMS network of the same operator is identical to the flow shown in fig. 15, and will not be described again.
As shown in fig. 15, the session establishment procedure in which the first terminal 81 initiates the session creation request may include:
in step 1601, the first terminal 81 initiates a session creation request (INVITE) to the first P-CSCF 821, wherein the session creation request is complete and not simplified.
In step 1602, after receiving the session creation request, the first P-CSCF 821 determines that the first terminal 81 does not support the simplified communication capability according to the registration information of the first terminal 81, and does not need to apply for transcoding resources and complete the session creation request.
In step 1603, the first P-CSCF 821 sends a complete session creation request to the first S-CSCF 823.
In step 1604, the first S-CSCF 823 sends the java-structured session creation request to the first AS 824 according to the user subscription information corresponding to the first terminal 81.
In step 1605, the first AS 824 executes corresponding service logic according to the subscription information of the user, and forwards the complete session creation request to the first S-CSCF 823.
In step 1606, the first S-CSCF 823 interacts with the first ENUM/DNS 825 to obtain information for the second I-CSCF 926.
The first S-CSCF 823 sends the complete session creation request to the second I-CSCF 926, step 1607.
In step 1608, the second I-CSCF 926 interacts with the second HSS 925 to obtain a second S-CSCF 923 where the second terminal 91 is located.
In step 1609, the second I-CSCF 926 sends the complete session creation request to the second S-CSCF 923.
In step 1610, the second S-CSCF 923 forwards the complete session creation request to the second AS 924 according to the user subscription information.
In step 1611, the second AS 924 executes corresponding service logic according to the subscription information, and forwards the complete session creation request to the second S-CSCF 923.
In step 1612, the second S-CSCF 923 sends the complete session creation request to the second P-CSCF 922.
In step 1613, the second P-CSCF 922 determines that the second terminal 91 supports the reduced communication capability according to the registration information of the second terminal 91, and interactively applies the codec capability of the satellite terminal with the second IMS-AGW 921, and adds the codec capability to the complete session creation request.
In step 1614, the second P-CSCF 922 simplifies the complete session creation request according to the preset information simplification rule, so as to obtain a simplified session creation request, and sends the simplified session creation request to the second terminal 91, where the simplified session creation request carries codec capability description information of the satellite terminal.
In step 1615, the second terminal 91 returns a reduced session creation response to the second P-CSCF 922.
In step 1616, the second P-CSCF 922 determines that the second terminal 91 supports the simplified communication capability according to the registration information of the second terminal 91, complements the simplified session creation response according to the preset information complementing rule, obtains a complemented session creation response, and sends the complemented session creation response to the second S-CSCF 923.
In step 1617, the second S-CSCF 923 forwards the complete session creation response to the second AS 924 according to the routing information in the completed session creation response.
In step 1618, the second AS 924 forwards the completed session creation response to the second S-CSCF 923.
In step 1619, the second S-CSCF 923 forwards the completed session creation response to the second I-CSCF 926 according to the routing information in the completed session creation response.
The second I-CSCF 926 forwards the completed session creation response to the first S-CSCF 823, step 1620.
The first S-CSCF 823 forwards the completed session creation response to the first AS 824, step 1621.
In step 1622, the first AS 824 forwards the completed session creation response to the first S-CSCF 823.
The first S-CSCF 823 forwards the completed session creation response to the first P-CSCF 821, step 1623.
In step 1624, the first P-CSCF 821 determines that the first terminal 81 does not support the reduced communication capability according to the registration information of the first terminal 81, and interacts with the first IMS-AGW 826 to complete the update of the media information, and adds the second media codec capability description information to the completed session creation response.
The first P-CSCF 821 forwards the completed session creation response to the first terminal 81, step 1625.
Thus far, an interaction procedure is completed, subsequent message interactions follow the principles described above, the second terminal 91 simplifies the message sent to the second P-CSCF 922, the second P-CSCF 922 complements the message from the second terminal 91 before sending it to the next hop network element, the second P-CSCF 922 simplifies the message returned to the second terminal 91, etc. In this manner, the amount of interaction information between the second terminal 91 and the second P-CSCF 922 may be reduced, thereby reducing at least one of communication latency, power consumption, and traffic consumption.
Example 7
As shown in fig. 16, in this embodiment, it is assumed that the first terminal 81 is a normal terminal, the second terminal 91 is a satellite terminal, the first terminal 81 initiates a session establishment request, the first terminal 81 and the second terminal 91 belong to two terminals under different IMS networks of different operators, the first terminal 81 accesses the first IMS network 82 through 4G/5G, and the second terminal 91 accesses the second IMS network 92 through a satellite.
The first IMS network 82 includes: a first P-CSCF 821, a first IMS-AGW 826, a first S-CSCF 823, a first AS 824, a first ENUM/DNS 825, a first IBCF 827 and a first TrGW 828.
The second IMS network 92 includes: a second P-CSCF 922, a second IMS-AGW 921, a second S-CSCF 923, a second AS 924, a second HSS 925, a second I-CSCF 926, a second IBCF927 and a second TrGW 928.
As shown in fig. 16, the session establishment procedure in which the first terminal 81 initiates the session creation request may include:
in step 1701, the first terminal 81 initiates a session creation request (INVITE) to the first P-CSCF 821, wherein the session creation request is complete and not simplified.
In step 1702, after receiving the session creation request, the first P-CSCF 821 determines that the first terminal 81 does not support the reduced communication capability according to the registration information of the first terminal 81, and does not need to apply for a transcoding resource or complete the session creation request.
The first P-CSCF 821 sends a session creation request to the first S-CSCF 823, step 1703.
In step 1704, the first S-CSCF 823 sends the session creation request to the first AS 824 according to the user subscription information corresponding to the first terminal 81.
In step 1705, the first AS 824 executes corresponding service logic according to the subscription information of the user, and forwards the session creation request to the first S-CSCF 823.
In step 1706, the first S-CSCF 823 interacts with the first ENUM/DNS 825 to obtain information for the first IBCF 827.
The first S-CSCF 823 sends a session creation request to the first IBCF 827, step 1707.
In step 1708, the first IBCF 827 forwards a session creation request to the second IBCF 927.
In step 1709, the second IBCF 927 forwards the session creation request to the second I-CSCF 926.
In step 1710, the second I-CSCF 926 interacts with the second HSS 925 to obtain a second S-CSCF 923 where the second terminal 91 is located.
The second I-CSCF 926 sends the session creation request to the second S-CSCF 923, step 1711.
In step 1712, the second S-CSCF 923 forwards the session creation request to the second AS 924 according to the user subscription information.
In step 1713, the second AS 924 forwards the session creation request to the second S-CSCF 923 after executing the corresponding service logic according to the subscription information of the user.
The second S-CSCF 923 sends the session creation request to the second P-CSCF 922, step 1714.
In steps 1715 and 1716, the second P-CSCF 922 determines that the second terminal 91 supports the reduced communication capability according to the registration information of the second terminal 91, and interacts with the second IMS-AGW 921 to apply for the codec capability of the satellite terminal, and adds the codec capability to the session creation request.
The second P-CSCF 922, in step 1717, sends the session creation request to the second terminal 91 after simplifying it.
The second terminal 91 returns a reduced session creation response to the second P-CSCF 922, step 1718.
In step 1719, the second P-CSCF 922 determines that the second terminal 91 supports the simplified communication capability according to the registration information of the second terminal 91, complements the simplified session creation response to obtain a complemented session creation response, and sends the complemented session creation response to the second S-CSCF 923.
In step 1720, the second S-CSCF 923 forwards the complete session creation response to the second AS 924 according to the routing information in the completed session creation response.
At step 1721, the second AS 924 forwards the completed session creation response to the second S-CSCF 923.
In step 1722, the second S-CSCF 923 forwards the complete session creation response to the second I-CSCF 926 according to the routing information in the completed session creation response.
At step 1723, the second I-CSCF 926 forwards the completed session creation response to the second IBCF 927.
In step 1724, the second IBCF 927 forwards the completed session creation response to the first IBCF 827.
At step 1725, the first IBCF 827 forwards a completed session creation response to the first S-CSCF 823.
At step 1726, the first S-CSCF 823 forwards the completed session creation response to the first AS 824.
At step 1727, the first AS 824 forwards the completed session creation response to the first S-CSCF 823.
At step 1728, the first S-CSCF 823 forwards the completed session creation response to the first P-CSCF 821.
In step 1729, the first P-CSCF 821 determines, according to the registration information of the first terminal 81, that the first terminal 81 does not support the reduced communication capability, does not need to apply for transcoding resources, and does not need to perform information reduction.
The first P-CSCF 821 forwards the completed session creation response to the first terminal 81, step 1730.
Thus far, an interaction procedure is completed, subsequent message interactions follow the principles described above, the second terminal 91 simplifies the message sent to the second P-CSCF 922, the second P-CSCF 922 complements the message from the second terminal 91 before sending it to the next hop network element, the second P-CSCF 922 simplifies the message returned to the second terminal 91, etc. In this manner, the amount of interaction information between the second terminal 91 and the second P-CSCF 922 may be reduced, thereby reducing at least one of communication latency, power consumption, and traffic consumption.
The above embodiments 1 to 7 focus on the application of the simplified message in the communication process between the satellite terminal and the corresponding P-CSCF, and the application of the simplified interaction flow in the communication process between the satellite terminal and the corresponding P-CSCF will be described below through embodiments 8 and 9.
Example 8
In this embodiment, it is assumed that the first terminal 81 is a normal terminal, the second terminal 91 is a satellite terminal, the first terminal 81 and the second terminal 91 belong to two terminals under different IMS networks of the same operator, the first terminal 81 accesses the first IMS network 82 through 4G/5G, and the second terminal 91 accesses the second IMS network 92 through a satellite.
The first IMS network 82 includes: a first P-CSCF 821, a first IMS-AGW 826, a first S-CSCF 823 and a first AS 824.
The second IMS network 92 includes: a second P-CSCF 922, a second IMS-AGW 921, a second S-CSCF 923, a second AS 924, and a second I-CSCF 926.
It should be noted that, the session flow of the common terminal and the satellite terminal in the same IMS network of the same operator is identical to the flow shown in fig. 17, and will not be described again.
As shown in fig. 17, the session procedure of the first terminal 81 (normal terminal) and the second terminal 91 (satellite terminal) may include:
in step 1801, during a session, the first terminal 81 initiates a session update request (upgrade or reactivation) to the first P-CSCF 821, where the session update request carries change status information or media codec information, and the session update request is complete and not simplified.
In step 1802, after receiving the session update request, the first P-CSCF 821 determines that the first terminal 81 does not support the simplified communication capability according to the registration information of the first terminal 81, and does not need to apply for transcoding resources, and does not simplify the interaction flow.
In step 1803, the first P-CSCF 821 sends the complete session update request to the first S-CSCF 823.
In step 1804, the first S-CSCF 823 sends the complete session update request to the first AS 824 according to the subscription information of the user corresponding to the first terminal 81.
In step 1805, after executing the corresponding service logic according to the subscription information of the user, the first AS 824 forwards the complete session update request to the first S-CSCF 823.
The first S-CSCF 823 sends the complete session update request to the second I-CSCF 926, step 1806.
In step 1807, the second I-CSCF 926 sends the complete session update request to the second S-CSCF 923 according to the stored routing information.
In step 1808, the second S-CSCF 923 forwards the complete session update request to the second AS 924 according to the saved reason information.
In step 1809, the second AS 924 executes corresponding service logic according to the subscription information, and then forwards the complete session update request to the second S-CSCF 923.
In step 1810, the second S-CSCF 923 sends the complete session update request to the second P-CSCF 922.
In step 1811, the second P-CSCF 922 determines that the second terminal 91 supports the simplified communication capability according to the registration information of the second terminal 91, and the session update request conforms to the principle of simplifying the interaction flow (for example, the state update of QoS, the codec update, etc.), and then starts the simplified interaction flow, applies for media information (including transcoding resources) to the second IMS-AGW 921, and generates an update response, but does not reversely issue the session update request to the second terminal 91.
The second P-CSCF 922 sends the generated update response to the second S-CSCF 923, step 1812.
In step 1813, the second S-CSCF 923 forwards the update response to the second AS 924 according to the routing information in the update response.
In step 1814, the second AS 924 forwards the update response to the second S-CSCF 923.
In step 1815, the second S-CSCF 923 forwards the update response to the second I-CSCF 926 according to the routing information in the update response.
The second I-CSCF 926 forwards the update response to the first S-CSCF 823, step 1816.
The first S-CSCF 823 forwards the update response to the first AS 824, step 1817.
In step 1818, the first AS 824 forwards the update response to the first S-CSCF 823.
The first S-CSCF 823 forwards the update response to the first P-CSCF 821, step 1819.
In step 1820, the first P-CSCF 821 determines that the first terminal 81 does not support the reduced communication capability, does not perform the message reduction operation, and interacts with the first IMS-AGW 826 to complete the media information update, based on the registration information of the first terminal 81.
The first P-CSCF 821 forwards the complete update response to the first terminal 81, step 1821.
Thus, the first interaction process is completed, the subsequent message interaction follows the principle described above, and the second P-CSCF 922 does not forward the unnecessary information that needs to be forwarded to the second terminal 91, so that the interaction flow of the second P-CSCF and the second P-CSCF can be simplified, the interaction times can be reduced, and at least one of the communication delay, the power consumption and the traffic consumption of the second terminal 91 can be reduced.
Example 9
In this embodiment, it is assumed that the first terminal 81 is a common terminal, the second terminal 91 is a satellite terminal, the first terminal 81 and the second terminal 91 belong to two terminals under different IMS networks of different operators, the first terminal 81 accesses the first IMS network 82 through 4G/5G, and the second terminal 91 accesses the second IMS network 92 through a satellite.
The first IMS network 82 includes: a first P-CSCF 821, a first IMS-AGW 826, a first S-CSCF 823, a first AS 824, a first ENUM/DNS 825, a first IBCF 827 and a first TrGW 828.
The second IMS network 92 includes: a second P-CSCF 922, a second IMS-AGW 921, a second S-CSCF 923, a second AS 924, a second I-CSCF 926, a second IBCF927 and a second TrGW 928.
As shown in fig. 18, the session procedure of the first terminal 81 (normal terminal) and the second terminal 91 (satellite terminal) may include:
in step 1901, during the session, the first terminal 81 initiates a session update request (upgrade or reactivation) to the first P-CSCF 821, where the session update request carries change status information or media codec information, and the session update request is complete and not simplified.
In step 1902, after receiving the session update request, the first P-CSCF 821 determines that the first terminal 81 does not support the simplified communication capability according to the registration information of the first terminal 81, and does not need to apply for transcoding resources, and does not simplify the interaction flow.
The first P-CSCF 821 sends the complete session update request to the first S-CSCF 823, step 1903.
In step 1904, the first S-CSCF 823 sends the complete session update request to the first AS 824 according to the subscription information of the user corresponding to the first terminal 81.
In step 1905, the first AS 824 executes corresponding service logic according to the subscription information of the user, and forwards the complete session update request to the first S-CSCF 823.
The first S-CSCF 823 sends a session update request to the first IBCF 827, step 1906.
In step 1907, the first IBCF 827 forwards a session update request to the second IBCF 927.
In step 1908, the second IBCF 927 forwards the session update request to the second S-CSCF 923.
In step 1909, the second S-CSCF 923 forwards the session update request to the second AS 924 according to the user subscription information.
In step 1910, the second AS 924 forwards the session update request to the second S-CSCF 923 after executing the corresponding service logic according to the subscription information of the user.
The second S-CSCF 923 sends the session update request to the second P-CSCF 922, step 1911.
In step 1912, the second P-CSCF 922 determines that the second terminal 91 supports the simplified communication capability according to the registration information of the second terminal 91, and the session update request conforms to the principle of simplifying the interaction flow (for example, the state update of QoS, the update of codec algorithm, etc.), and starts the simplified interaction flow, applies for media information (including transcoding resources) to the second IMS-AGW 921, and generates an update response, but does not reversely issue the session update request to the second terminal 91.
The second P-CSCF 922 sends the generated update response to the second S-CSCF 923, step 1913.
In step 1914, the second S-CSCF 923 forwards the update response to the second AS 924 according to the routing information in the update response.
The second AS 924 forwards the update response to the second S-CSCF 923, step 1915.
In step 1916, the second S-CSCF 923 forwards the update response to the second IBCF 927 according to the routing information in the update response.
In step 1917, the second IBCF 927 forwards the update response to the first IBCF 827.
The first IBCF 827 forwards the update response to the first S-CSCF 823, step 1918.
The first S-CSCF 823 forwards the update response to the first AS 824, step 1919.
In step 1920, the first AS 824 forwards the update response to the first S-CSCF 823.
The first S-CSCF 823 forwards the update response to the first P-CSCF 821, step 1921.
In step 1922, the first P-CSCF 821 determines that the first terminal 81 does not support the reduced communication capability, does not perform the message reduction operation, and interacts with the first IMS-AGW 826 to complete the media information update, based on the registration information of the first terminal 81.
The first P-CSCF 821 forwards the complete update response to the first terminal 81, step 1923.
Thus, the first interaction process is completed, the subsequent message interaction follows the principle described above, and the second P-CSCF 922 does not forward the unnecessary information that needs to be forwarded to the second terminal 91, so that the interaction flow of the second P-CSCF and the second P-CSCF can be simplified, the interaction times can be reduced, and at least one of the communication delay, the power consumption and the traffic consumption of the second terminal 91 can be reduced.
The foregoing describes a communication method provided by the embodiments of the present application, and the following describes a communication device provided by the embodiments of the present application.
Fig. 19 shows a schematic structural diagram of a communication device 1900 according to an embodiment of the present application, where the device 1900 may be applied to a first terminal. As shown in fig. 19, the apparatus 1900 may include: interaction module 1901.
An interaction module 1901 is configured to interact with a first P-CSCF through simplified initial session protocol (Session Initiation Protocol, SIP) information and/or simplified interaction procedures, where the first P-CSCF is affiliated with the first IMS network, if the first terminal supports simplified communication capabilities.
The first terminal may be a terminal with a SIP information simplification requirement and/or an interaction flow simplification requirement. Specifically, the first terminal may include, but is not limited to, one of a satellite terminal, an internet of things terminal, and a man-machine communication terminal.
In some embodiments, the interaction module 1901 may be specifically configured to: the SIP information simplified based on the preset information simplification rule is sent to the first P-CSCF; and/or receiving the SIP information which is sent by the first P-CSCF and is simplified based on the preset information simplification rule.
Specifically, the communication device provided by the embodiment of the application can achieve the purposes of simplifying the message and simplifying the flow in the processes that the first terminal initiates the IMS registration request to the first P-CSCF, the first terminal initiates the session creation request to the first P-CSCF, the first terminal receives the session creation request from the first P-CSCF and the like, thereby solving at least one of the problems of large time delay, high power consumption, large flow consumption and the like in the multimedia service of the communication based on the SIP protocol of the first terminal.
One) IMS registration
In the IMS registration process, as shown in fig. 20, the interaction module 1901 may specifically include: a first transmit submodule 19011 and a first receive submodule 19012.
A first sending sub-module 19011 is configured to send first simplified SIP information to the first P-CSCF.
The first simplified SIP information carries an IMS registration request and an indication that the first terminal supports simplified communication capability, the first simplified SIP information is simplified according to a preset information simplification rule, the first P-CSCF is configured to store the simplified communication capability of the first terminal when determining that the first terminal supports simplified communication capability according to the indication, initiate a simplified registration procedure for the first terminal, complement the first simplified SIP information according to a preset information complementation rule to obtain first complete SIP information, interact with other network elements in the first IMS network according to the first complete SIP information to obtain an IMS registration response, and simplify the IMS registration response according to the preset information simplification rule to obtain second simplified SIP information when determining that the IMS registration response is necessary information, where the preset information simplification rule is complementary to the preset information complementation rule.
Optionally, in the case that the IMS registration response is determined to be unnecessary information, the first P-CSCF omits a step of returning simplified information about the IMS registration response to the first terminal, thereby simplifying an IMS registration procedure.
A first receiving submodule 19012, configured to receive the second simplified SIP information sent by the first P-CSCF.
Two) Session establishment of Session creation request initiated by first terminal
In the session establishment process of the first terminal initiating the session creation request, as shown in fig. 21, the interaction module 1901 may further include, in addition to the first sending submodule 19011 and the first receiving submodule 19012: a second transmit sub-module 19013 and a second receive sub-module 19014.
And a second sending submodule 19013, configured to send third simplified SIP information to the first P-CSCF, where the third simplified SIP information carries a session creation request for establishing a session with the second terminal, where the third simplified SIP information is simplified according to the preset information simplification rule, and the first P-CSCF is further configured to start a simplified session creation flow, supplement the third simplified SIP information according to the preset information supplement rule to obtain third complete SIP information, and interact with other network elements in the first IMS network according to the third complete SIP information to obtain a session creation response, and simplify the session creation response according to the preset information simplification rule to obtain fourth simplified SIP information if it is determined that the session creation response is necessary information according to the preset information simplification rule, where the preset information simplification rule is reciprocal to the preset information supplement rule.
Optionally, in the case that the first P-CSCF determines that the session creation response is unnecessary information according to a preset flow simplification rule, a step of returning simplified information about the session creation response to the first terminal may be omitted, and a response message may be directly returned from the first P-CSCF to the next hop network element, thereby simplifying the session establishment flow.
A second receiving sub-module 19014, configured to receive the fourth simplified SIP information sent by the first P-CSCF.
Optionally, the third simplified SIP information further carries first media codec capability description information, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal. Further, a second media codec capability description information is newly added in the third complete SIP information, where the second media codec capability description information includes a codec algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW is affiliated to the first IMS network.
Correspondingly, the session creation response also carries second media coding and decoding capability description information, wherein the second media coding and decoding capability description information comprises a coding and decoding algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW belongs to the first IMS network; the fourth simplified SIP information does not include the second media codec capability description information, that is, the second media codec capability description information in the fourth simplified SIP information is deleted, and only the media codec capability description information specific to the first terminal is reserved.
In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal.
Third), the first terminal receives the session establishment of the session creation request
In the session establishment process in which the first terminal receives the session creation request, as shown in fig. 22, the interaction module 1901 may further include, in addition to the first transmission submodule 19011 and the first reception submodule 19012: a third receiving sub-module 19015 and a third transmitting sub-module 19016.
And a third receiving sub-module 19015, configured to receive fifth simplified SIP information sent by the first P-CSCF, where the fifth simplified SIP information carries a session creation request from the second terminal, and the fifth simplified SIP information is simplified by the first P-CSCF according to the preset information simplification rule.
And a third sending sub-module 19016, configured to send sixth simplified SIP information to the first P-CSCF, where the sixth simplified SIP information carries a session creation response for the session creation request, where the sixth simplified SIP information is simplified according to the preset information simplification rule, and the first P-CSCF is further configured to complement the sixth simplified SIP information according to the preset information complementation rule to obtain sixth complete SIP information, and send the sixth complete SIP information to the first serving call session control function entity S-CSCF, so that the first S-CSCF assists in completing session creation, where the preset information simplification rule is complementary to the preset information complementation rule, and the first S-CSCF is affiliated to the first IMS network.
Optionally, the session creation request further carries second media codec capability description information, where the second media codec capability description information includes a codec algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW is affiliated to the first IMS network; the second media codec capability description information in the fifth simplified SIP information is replaced with first media codec capability description information, wherein the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal.
Correspondingly, the sixth simplified SIP information further carries first media codec capability description information, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal; and a second media coding and decoding capability description information is newly added in the sixth complete SIP information, wherein the second media coding and decoding capability description information comprises a coding and decoding algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW belongs to the first IMS network.
In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal. In addition, the media conversion is moved up to the first P-CSCF, so that the cost of the chip codec conversion in the first terminal can be reduced.
In the above embodiment, the home network of the second terminal is the first IMS network; or the home network of the second terminal is a second IMS network, and the first IMS network and the second IMS network may belong to the same operator or may belong to different operators.
Furthermore, the second terminal and the first terminal may be of the same type, for example, both the first terminal and the second terminal may be satellite terminals; the second terminal may also be of a different type than the first terminal, for example the first terminal may be a satellite terminal and the second terminal a regular terminal.
The communication device 1900 provided in the embodiment of the present application may be used to implement the embodiments of the communication method shown in fig. 2, and for relevant points, reference is made to the above-mentioned method embodiments.
Fig. 23 shows a schematic structural diagram of a communication device 2300 according to an embodiment of the present application, where the device 2300 is applicable to a first P-CSCF. As shown in fig. 23, the apparatus 2300 may include: a first interaction module 2301.
A first interaction module 2301, configured to interact with a first terminal through simplified SIP information and/or simplified interaction procedures in case it is confirmed that the first terminal supports simplified communication capabilities, where the first terminal belongs to the first IMS network.
The first terminal may be a terminal with a SIP information simplification requirement and/or an interaction flow simplification requirement. Specifically, the first terminal may include, but is not limited to, one of a satellite terminal, an internet of things terminal, and a man-machine communication terminal.
In the embodiment of the application, the first terminal accesses the first IMS network to support basic audio and video call. And the method supports the simplification of SIP messages, supports the carrying of the simplifying capability indication during IMS registration, and supports a specific coding and decoding algorithm.
In some embodiments, the first interaction module 2301 may be specifically configured to: receiving SIP information which is sent by a first terminal and is simplified based on preset information simplification rules; and/or sending the SIP information simplified based on the preset information simplification rule to the first terminal.
On this basis, the apparatus shown in fig. 23 may further include:
the information complement module is used for complementing the simplified SIP information according to a preset information complement rule to obtain complete SIP information, wherein the preset message complement rule is reciprocal to the preset message complement rule;
and the second interaction module is used for interacting with other network elements in the first IMS network based on the complete SIP information.
Specifically, the communication device 2300 provided in this embodiment of the present application may achieve the purposes of message simplification and flow simplification in the process that the first terminal initiates the IMS registration request to the first P-CSCF, the first terminal initiates the session creation request to the first P-CSCF, and the first terminal receives the session creation request from the first P-CSCF, so as to solve at least one of the problems of large delay, high power consumption, and large flow consumption in the multimedia service that is based on SIP protocol communication for the first terminal, which will be described in detail below.
One) IMS registration
In the IMS registration process, as shown in fig. 24, the first interaction module 2301 may specifically include: a first receiving sub-module 23011, a first control sub-module 23012, a first complement sub-module 23013, a first interaction sub-module 23014, a first simplification sub-module 23015 and a first sending sub-module 23016.
A first receiving submodule 23011, configured to receive first simplified SIP information sent by the first terminal, where the first simplified SIP information carries an IMS registration request and an indication that the first terminal supports a simplified communication capability, and the first simplified SIP information is simplified according to a preset information simplification rule.
A first control submodule 23012 configured to save the reduced communication capability of the first terminal and initiate a reduced registration procedure for the first terminal if it is determined that the first terminal supports reduced communication capability according to the indication.
The first complement submodule 23013 is configured to complement the first simplified SIP information according to a preset information complement rule to obtain first complete SIP information, where the preset information complement rule is complementary to the preset information complement rule.
A first interaction sub-module 23014, configured to interact with other network elements in the first IMS network according to the first complete SIP information, to obtain an IMS registration response.
For example, according to the first complete SIP information, interacting with a first S-CSCF in the first IMS network, to obtain an IMS registration response.
The first simplifying submodule 23015 is configured to, when determining that the IMS registration response is necessary information according to a preset flow simplifying rule, simplify the IMS registration response according to the preset information simplifying rule to obtain second simplified SIP information.
Optionally, if the IMS registration response is determined to be unnecessary information according to a preset flow simplification rule, corresponding response information is returned to a next hop network element (e.g., a first S-CSCF) of the first IMS network, and a step of sending simplified SIP information about the IMS registration response to the first terminal is omitted.
A first sending sub-module 23016, configured to send the second simplified SIP information to the first terminal.
Two) Session establishment of Session creation request initiated by first terminal
In the session establishment procedure in which the first terminal initiates the session creation request, as shown in fig. 25, the first interaction module 2301 may further include: a second receiving sub-module 23017, a second control sub-module 23018, a second complement sub-module 23019, a second interaction sub-module 23020, a second simplification sub-module 23021 and a second sending sub-module 23022.
A second receiving sub-module 23017, configured to receive third simplified SIP information sent by the first terminal, where the third simplified SIP information carries a session creation request for establishing a session with the second terminal, and the third simplified SIP information is simplified according to the preset information simplification rule.
A second control sub-module 23018 for initiating a reduced session creation procedure in case it is determined that said first terminal supports reduced communication capabilities.
Specifically, whether the first terminal supports the reduced communication capability may be determined according to the reduced communication capability stored when the first terminal registers with the IMS.
And a second complementing sub-module 23019, configured to complement the third simplified SIP information according to a preset information complementing rule, so as to obtain third complete SIP information, where the preset information complementing rule is complementary to the preset information complementing rule.
Optionally, the third simplified SIP information carries first media codec capability description information, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal.
Optionally, second media codec capability description information is added to the third complete SIP information, where the second media codec capability description information includes a codec algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW is affiliated to the first IMS network. In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal.
And a second interaction submodule 23020, configured to interact with other network elements in the first IMS network according to the third complete SIP information, so as to obtain a session creation response.
For example, according to the third complete SIP information, interacting with a first S-CSCF in the first IMS network, to obtain a session creation response.
And the second simplifying sub-module 23021 is configured to, when determining that the session creation response is necessary information according to a preset flow simplifying rule, simplify the session creation response according to the preset information simplifying rule, and obtain fourth simplified SIP information.
Optionally, in the case that the session creation response is determined to be unnecessary information according to a preset flow simplification rule, corresponding response information is returned to a next hop network element (such as a first S-CSCF) of the first IMS network, and a step of sending simplified SIP information about the session creation response to the first terminal is omitted.
A second sending submodule 23022 configured to send the fourth simplified SIP information to the first terminal.
Optionally, the session creation response carries second media codec capability description information, where the second media codec capability description information includes a codec algorithm supported by the second terminal and media address information of the second terminal. Correspondingly, deleting the second media coding and decoding capability description information in the fourth simplified SIP information. In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal.
Third), the first terminal receives the session establishment of the session creation request
In the session establishment procedure in which the first terminal receives the session creation request, as shown in fig. 26, the first interaction module 2301 may further include: a third transmit sub-module 23023, a third receive sub-module 23024, a third complement sub-module 23025 and a fourth transmit sub-module 23026.
A third sending submodule 23023, configured to send fifth simplified SIP information to the first terminal, where the fifth simplified SIP information carries a session creation request from the second terminal, and the fifth simplified SIP information is simplified by the first P-CSCF according to the preset information simplification rule.
Optionally, the session creation request further carries second media codec capability description information, where the second media codec capability description information includes a codec algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW is affiliated to the first IMS network. Optionally, the second media codec capability description information in the fifth simplified SIP information is replaced with first media codec capability description information, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal. In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal. In addition, the media conversion is moved up to the first P-CSCF, so that the cost of the chip codec conversion in the first terminal can be reduced.
A third receiving sub-module 23024, configured to receive sixth simplified SIP information sent by the first terminal, where the sixth simplified SIP information carries a session creation response to the session creation request, and the sixth simplified SIP information is simplified according to the preset information simplification rule.
And a third complementing sub-module 23025, configured to complement the sixth simplified SIP information according to a preset information complementing rule, so as to obtain sixth complete SIP information, where the preset information complementing rule is complementary to the preset information complementing rule.
A fourth sending submodule 23026, configured to send the sixth complete SIP information to a first serving call session control function entity S-CSCF, so that the first S-CSCF assists in completing session creation, where the first S-CSCF is affiliated to the first IMS network.
Optionally, the sixth simplified SIP information further carries first media codec capability description information, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal. Optionally, second media codec capability description information is added to the sixth complete SIP information, where the second media codec capability description information includes a codec algorithm supported by the second terminal and media address information of a first access gateway AGW, and the first AGW is affiliated to the first IMS network. In this way, on the first IMS network side, the first P-CSCF may control the first AGW to complete media conversion, so that the first terminal and the second terminal may use different media coding and decoding algorithms, different media data packing periods, and the like, so as to implement media data intercommunication between the first terminal and the second terminal different from the first terminal, and implement media data intercommunication between the satellite terminal and the common terminal. In addition, the media conversion is moved up to the first P-CSCF, so that the cost of the chip codec conversion in the first terminal can be reduced.
In the above embodiment, the home network of the second terminal is the first IMS network; or the home network of the second terminal is a second IMS network, and the first IMS network and the second IMS network may belong to the same operator or may belong to different operators.
Furthermore, the second terminal and the first terminal may be of the same type, for example, both the first terminal and the second terminal may be satellite terminals; the second terminal may also be of a different type than the first terminal, for example the first terminal may be a satellite terminal and the second terminal a regular terminal.
The communication device 2300 provided in the embodiments of the present application may be used to implement the embodiments of the communication method shown in fig. 6, and reference is made to the embodiments of the method for relevant points.
Fig. 27 is a schematic structural view of a terminal according to another embodiment of the present application. The terminal 2700 shown in fig. 27 includes: at least one processor 2701, memory 2702, at least one network interface 2704, and a user interface 2703. The various components in terminal 2700 are coupled together by a bus system 2705. It is appreciated that bus system 2705 is used to facilitate connected communications between these components. The bus system 2705 includes a power bus, a control bus, and a status signal bus in addition to the data bus. For clarity of illustration, the various buses are labeled as bus system 2705 in fig. 27.
The user interface 2703 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, a trackball, a touch pad, or a touch screen, etc.).
It is to be appreciated that memory 2702 in embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The nonvolatile memory may be a Read-only memory (ROM), a Programmable ROM (PROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and Direct memory bus RAM (DRRAM). The memory 2702 of the systems and methods described in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.
In some implementations, memory 2702 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set thereof: an operating system 27021 and application programs 27022.
The operating system 27021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application programs 27022 include various application programs such as a media player (MediaPlayer), a Browser (Browser), and the like for implementing various application services. A program implementing the method of the embodiment of the present application may be included in the application program 27022.
In the embodiment of the present application, the terminal 2700 further includes: a computer program stored in the memory 2702 and executable on the processor 2701, wherein the computer program realizes the respective processes of the above communication method when executed by the processor 2701 and achieves the same technical effects, and is not repeated here.
The methods disclosed in the embodiments of the present application may be applied to the processor 2701 or implemented by the processor 2701. The processor 2701 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the methods described above may be performed by integrated logic circuitry in hardware or instructions in software in processor 2701. The processor 2701 described above may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a computer readable storage medium well known in the art such as random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, and the like. The computer readable storage medium is located in the memory 2702, and the processor 2701 reads information in the memory 2702 and performs the steps of the above method in combination with its hardware. In particular, the computer readable storage medium has stored thereon a computer program which, when executed by the processor 2701, performs the steps of the communication method embodiments described above.
Referring to fig. 28, fig. 28 is a block diagram of a network device applied in the embodiment of the present application, which can implement details of the above communication method and achieve the same effects. As shown in fig. 28, the network device 2800 includes: a processor 2801, a transceiver 2802, a memory 2803, a user interface 2804, and a bus interface, wherein:
in the embodiment of the present application, the network device 2800 further includes: computer programs stored in the memory 2803 and executable on the processor 2801, which when executed by the processor 2801, implement the respective processes of the communication method described above, and achieve the same technical effects, and are not repeated here.
In fig. 28, a bus architecture may be comprised of any number of interconnected buses and bridges, and in particular at least one processor, represented by processor 2801, and various circuits of memory, represented by memory 2803, are linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 2802 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 2804 may also be an interface capable of interfacing with an inscribed desired device for different terminals, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 2801 is responsible for managing the bus architecture and general processing, and the memory 2803 may store data used by the processor 2801 in performing operations.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For a hardware implementation, the processing units may be implemented within at least one application specific integrated circuit (Application Specific Integrated Circuits, ASIC), a digital signal processor (Digital Signal Processing, DSP), a digital signal processing Device (DSP Device, DSPD), a programmable logic Device (Programmable Logic Device, PLD), a Field programmable gate array (Field-Programmable Gate Array, FPGA), a general purpose processor, a controller, a microcontroller, a microprocessor, other electronic units for performing the functions described herein, or a combination thereof.
For a software implementation, the techniques described in embodiments of the present application may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in embodiments of the present application. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
The embodiment of the application further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements each process of the above-mentioned communication method embodiment, and can achieve the same technical effects, so that repetition is avoided, and no further description is provided herein. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
Embodiments of the present application also provide a computer program product comprising instructions which, when executed by a computer, perform the above-described communication method. In particular, the computer program product may run on the network device described above.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (29)
1. A communication method applied to a first terminal, the first terminal being affiliated to a first IMS network, the method comprising:
and under the condition that the first terminal supports the simplified communication capability, interacting with a first proxy call session control function entity (P-CSCF) through simplified initial session protocol (SIP) information and/or simplified interaction flow, wherein the first P-CSCF is affiliated to the first IMS network.
2. The method according to claim 1, wherein the interaction with the first proxy call session control function entity P-CSCF through the simplified SIP information and/or the simplified interaction procedure comprises:
the SIP information simplified based on the preset information simplification rule is sent to the first P-CSCF;
and/or the number of the groups of groups,
and receiving the SIP information which is sent by the first P-CSCF and is simplified based on the preset information simplification rule.
3. The method of claim 2, wherein the sending, to the first P-CSCF, the SIP information simplified based on the preset information simplification rule includes at least one of:
sending first simplified SIP information to the first P-CSCF, wherein the first simplified SIP information carries an IMS registration request, and the first simplified information is obtained by simplifying the IMS registration request based on the preset information simplification rule;
Sending third simplified SIP information to the first P-CSCF, wherein the third simplified SIP information carries a session creation request for establishing a session with a second terminal, and the third simplified information is obtained by simplifying the session creation request based on the preset information simplification rule;
and sending sixth simplified SIP information to the first P-CSCF, wherein the sixth simplified SIP information carries a session creation response to a session creation request initiated by the second terminal, and the sixth simplified information is obtained by simplifying the session creation response based on the preset information simplification rule.
4. A method according to claim 3, wherein the receiving the SIP information simplified based on the preset information simplification rule sent by the first P-CSCF includes at least one of:
receiving second simplified SIP information sent by the first P-CSCF, wherein the second simplified SIP information is obtained by simplifying an IMS registration response based on the preset information simplification rule, and the IMS registration response is for an IMS registration request initiated by the first terminal;
receiving fourth simplified SIP information sent by the first P-CSCF, wherein the fourth simplified information is obtained by simplifying a session creation response based on the preset information simplification rule, and the session creation response is a session creation request initiated by the first terminal;
And receiving fifth simplified SIP information sent by the first P-CSCF, wherein the fifth simplified SIP information is obtained by simplifying a session creation request from a second terminal based on the preset information simplification rule.
5. The method according to any of claims 2-4, wherein in case the reduced SIP information is multimedia interactive service information, the media codec indication information carried in the reduced SIP information only includes first media codec capability description information supported by the first terminal device, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal.
6. The method according to claim 3 or 4, wherein,
the home network of the second terminal is the first IMS network;
or,
the home network of the second terminal is a second IMS network, and the first IMS network and the second IMS network belong to the same operator or to different operators.
7. The method of any of claims 2-4, the preset information reduction rule comprising at least one of:
simplified rules for SIP message field names;
A simplification rule for SIP parameter values;
simplified rules for media negotiation parameters.
8. The method of claim 7, wherein the reduced rule for SIP message field names comprises: the original names of the different SIP message fields are simplified into one character, and the characters corresponding to the simplified original names of the different SIP message fields are different.
9. The method of claim 7, wherein the simplification rules for SIP parameter values comprise: all or part of the header specifying the SIP parameter values is deleted.
10. The method of claim 7, wherein the reduced rule for media negotiation parameters comprises: the designated media negotiation parameters are deleted in whole or in part.
11. The method according to any of claims 1-4, wherein in the simplified interaction procedure the first P-CSCF omits the step of sending unnecessary information to the first terminal, wherein the unnecessary information fulfils at least one of the following conditions:
the first terminal is not influenced to carry out media negotiation;
the transmission of key information which does not affect the communication of the first terminal is not affected;
and the transmission of key instructions of the first terminal is not affected.
12. The method according to any of claims 1-4, 8-10, the first terminal being a terminal having SIP information reduction requirements and/or interactive flow reduction requirements.
13. The method of claim 12, the first terminal comprising one of a satellite terminal, an internet of things terminal, and a man-machine communication terminal.
14. A communication method applied to a first proxy call session control function entity, P-CSCF, the first P-CSCF being affiliated to a first IMS network, the method comprising:
in case it is confirmed that the first terminal supports the reduced communication capability, interacting with the first terminal through reduced initial session protocol, SIP, information and/or reduced interaction procedures, the first terminal being affiliated with the first IMS network.
15. The method of claim 14, wherein in the simplified interaction flow, the first P-CSCF omits the step of sending unnecessary information to the first terminal, the unnecessary information satisfying at least one of the following conditions:
the first terminal is not influenced to carry out media negotiation;
the transmission of key information which does not affect the communication of the first terminal is not affected;
and the transmission of key instructions of the first terminal is not affected.
16. The method according to claim 14 or 15, wherein said interacting with the first terminal through simplified initial session protocol, SIP, information and/or simplified interaction procedures in case it is confirmed that the first terminal supports simplified communication capabilities, comprises:
receiving SIP information which is sent by a first terminal and is simplified based on preset information simplification rules;
and/or the number of the groups of groups,
and sending the SIP information simplified based on the preset information simplification rule to the first terminal.
17. The method of claim 16, after the receiving the SIP information simplified based on the preset information simplification rule sent by the first terminal, the method further comprises:
complementing the simplified SIP information according to a preset information complementing rule to obtain complete SIP information, wherein the preset message simplifying rule and the preset message complementing rule are mutually inverse;
interacting with other network elements in the first IMS network based on the complete SIP information.
18. The method of claim 16, wherein in the case where the simplified SIP information is multimedia interactive service information, the media codec indication information carried in the simplified SIP information includes only first media codec capability description information supported by the first terminal device, where the first media codec capability description information includes a codec algorithm specific to the first terminal and media address information of the first terminal.
19. The method of claim 16, wherein the receiving the SIP information simplified based on the preset information simplification rule sent by the first terminal includes at least one of:
receiving first simplified SIP information sent by a first terminal, wherein the first simplified SIP information carries an IMS registration request initiated by the first terminal, and the first simplified information is obtained by simplifying the IMS registration request based on the preset information simplification rule;
receiving third simplified SIP information sent by the first terminal, wherein the third simplified SIP information carries a session creation request for establishing a session with a second terminal, and the third simplified information is obtained by simplifying the session creation request based on the preset information simplification rule;
and receiving sixth simplified SIP information sent by the first terminal, wherein the sixth simplified SIP information carries a session creation response to a session creation request initiated by the second terminal, and the sixth simplified information is obtained by simplifying the session creation response based on the preset information simplification rule.
20. The method of claim 19, wherein the sending, to the first terminal, the SIP information simplified based on the preset information simplification rule includes at least one of:
Under the condition that an IMS registration response to an IMS registration request initiated by the first terminal is determined to be necessary information according to a preset flow simplification rule, second simplified SIP information is sent to the first terminal, wherein the second simplified SIP information is obtained by simplifying the IMS registration response based on the preset information simplification rule;
under the condition that a session creation response to a session creation request initiated by the first terminal is determined to be necessary information according to a preset flow simplification rule, fourth simplified SIP information is sent to the first terminal, wherein the fourth simplified information is obtained by simplifying the session creation response based on the preset information simplification rule;
and sending fifth simplified SIP information to the first terminal, wherein the fifth simplified SIP information carries a session creation request from the second terminal, and the fifth simplified SIP information is obtained by simplifying the session creation request based on the preset information simplification rule.
21. The method according to claim 19 or 20, wherein,
the home network of the second terminal is the first IMS network;
or,
the home network of the second terminal is a second IMS network, and the first IMS network and the second IMS network belong to the same operator or to different operators.
22. The method of claim 16, the preset information reduction rule comprising at least one of:
simplified rules for SIP message field names;
a simplification rule for SIP parameter values;
simplified rules for media negotiation parameters.
23. The method of claim 22, wherein the reduced rule for SIP message field names comprises: the original names of the different SIP message fields are simplified into one character, and the characters corresponding to the simplified original names of the different SIP message fields are different.
24. The method of claim 22, wherein the simplification rules for SIP parameter values comprise: all or part of the header specifying the SIP parameter values is deleted.
25. The method of claim 22, wherein the reduced rules for media negotiation parameters comprise: the designated media negotiation parameters are deleted in whole or in part.
26. The method according to any of claims 14-15, 23-25, the first terminal being a terminal having SIP information reduction requirements and/or interactive flow reduction requirements.
27. The method of claim 26, the first terminal comprising one of a satellite terminal, an internet of things terminal, and a man-machine communication terminal.
28. An electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the method of any one of claims 1 to 13 or to implement the method of any one of claims 14 to 27.
29. A computer readable storage medium, which when executed by a processor of an electronic device, causes the electronic device to perform the method of any one of claims 1 to 13, or causes the electronic device to perform the method of any one of claims 14 to 27.
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