CN108260170A - A kind of resource reservation control method and MGCF units - Google Patents
A kind of resource reservation control method and MGCF units Download PDFInfo
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- CN108260170A CN108260170A CN201611234612.2A CN201611234612A CN108260170A CN 108260170 A CN108260170 A CN 108260170A CN 201611234612 A CN201611234612 A CN 201611234612A CN 108260170 A CN108260170 A CN 108260170A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/26—Resource reservation
Abstract
The present invention discloses a kind of resource reservation control method and MGCF units, is related to field of communication technology, to solve the problems, such as calling terminal and when called terminal is between CS domains is called extends.The resource reservation control method, including：When called terminal resides in circuit-switched CS domain, the invitation message for picking out Media Gateway Control Function MGCF units and receiving calling called terminal of network protocol multi-media sub-system IMS network；Whether judge in invitation message comprising Session Border Controller domain sbc domain parameters；If it is determined that invitation message does not include sbc domain parameters, then the call negotiation that non-resource reserves form is performed.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of resource reservation control method and MGCF units.
Background technology
VOLTE (Voice over Long Term Evolution, LTE voice bearer) is a kind of based on IMS
The speech business of (Internet Protocol Multimedia Subsystem, network protocol multi-media sub-system).Make
Include four kinds with the scene called between the user terminal of VOLTE business, respectively calling terminal, called terminal resides in
In IMS network, calling terminal resides in IMS network and called terminal resides in CS (Circuit Switched, circuit switching)
Domain, calling terminal resides in CS domains and called terminal resides in IMS network, and calling terminal, called terminal are resident in the cs domain.
But when calling terminal calls called terminal, need distributing radio resource, it is thus possible to will appear the unripe matchmaker of IMS network
The situation of body resource.Cause former seconds calling terminals, called terminals that calling is connected that can not receive voice messaging, user
Sound can not be heard in calling terminal and called terminal.In order to avoid the above situation occurs, needed before dialed terminal bell
Carry out Precondition resource reservation, it is ensured that calling terminal and called terminal get out media before dialed terminal bell
Resource so as to ensure after calling terminal is connected with called terminal, can receive voice messaging at once.
When calling terminal and called terminal it is resident in the cs domain, due to the calling letter between calling terminal and called terminal
It ceases and is passed from access MGCF (Media Gateway Control Function, Media Gateway Control Function) unit of IMS network
That transports to IMS network picks out MGCF units.And access MGCF units of IMS network and to pick out network between MGCF units whole
For cable network, the distribution of radio resource is not needed to carry out.It the access MGCF units of IMS network and picks out between MGCF units
Delay is generated when Precondition resource reservation process can be called between calling terminal and called terminal, causes to call
Time delay it is long.
Invention content
An embodiment of the present invention provides a kind of resource reservation control method and MGCF units, can reduce calling terminal and by
The time delay called when terminal being made to be between CS domains.
In a first aspect, an embodiment of the present invention provides a kind of resource reservation control method, including：When called terminal resides in
During circuit-switched CS domain, network protocol multi-media sub-system IMS network picks out the reception of Media Gateway Control Function MGCF units
Call the invitation message of called terminal；Whether judge in invitation message comprising Session Border Controller domain sbc-domain parameters；
If it is determined that invitation message does not include sbc-domain parameters, then the call negotiation that non-resource reserves form is performed.
In some embodiments of first aspect, above-mentioned resource reservation control method further includes：If it is determined that invitation message packet
Parameter containing sbc-domain then performs the call negotiation of resource reservation form.
In some embodiments of first aspect, whether judge to visit in message comprising Session Border Controller domain sbc-
The step of domain parameters, includes：Judge invitation message access network information P-Access-Network-Info header fields whether
Contain sbc-domain parameters.
In some embodiments of first aspect, perform the step of non-resource reserves the call negotiation of form and include：To net
The access MGCF units of network protocol multi-media sub-system IMS network send to invite and reply message, and invite the requirement replied message
Require header fields do not indicate resource reservation；Initial address message (IAM) IAM is sent to the mobile switching centre of called terminal；Receive quilt
It is the address full information ACM that the mobile switching centre of terminal sends.
In some embodiments of first aspect, the step invited and replied message is sent to the access MGCF units of IMS network
Suddenly include：It sends to invite to the call session control function CSCF units or application server of called terminal and reply message, so that
It obtains CSCF units or invitation is replied message the access MGCF units for being transmitted to IMS network by application server.
Second aspect, an embodiment of the present invention provides a kind of MGCF units, which is characterized in that including：Invite receiving module,
When being configured as called terminal and residing in circuit-switched CS domain, the invitation message of calling called terminal is received；Judgment module, quilt
It whether is configured to judge in invitation message comprising Session Border Controller domain sbc-domain parameters；Non-resource reserves module, quilt
It is configured to if it is determined that invitation message then performs the call negotiation that non-resource reserves form not comprising sbc-domain parameters.
In some embodiments of second aspect, above-mentioned MGCF units further include：Resource reservation module, if being configured as sentencing
Determine invitation message and include sbc-domain parameters, then perform the call negotiation of resource reservation form.
In some embodiments of second aspect, judgment module is specifically configured to judge the access network letter of invitation message
Cease whether P-Access-Network-Info header fields contain sbc-domain parameters.
In some embodiments of second aspect, non-resource is reserved module and is specifically configured to：Access to IMS network
MGCF units send to invite and reply message, and the requirement replied message require header fields is invited not indicate resource reservation；To called end
The mobile switching centre at end sends initial address message (IAM) IAM；The address that the mobile switching centre of reception called terminal sends is complete
Information ACM.
In some embodiments of second aspect, non-resource is reserved module and is specifically configured to：Calling to called terminal
Conversation control function CSCF units or application server send to invite and reply message, so that CSCF units or application server will
Invite the access MGCF units for replying message and being transmitted to IMS network.
The embodiment of the present invention provides a kind of resource reservation control method and MGCF units, when called terminal resides in CS domains
When, whether the MGCF units that pick out of called terminal receive invitation message, judge comprising sbc-domain parameters in invitation message, if
Do not include sbc-domain parameters in invitation message, show that the message request comes from the access MGCF units of IMS network, yet
It is to say that calling terminal also resides on CS domains, then the call negotiation of form is reserved using non-resource, does not need to carry out resource reservation step
Suddenly, so as to eliminate the call negotiation the time it takes for performing resource reservation form, reduce calling terminal and called terminal is equal
The time delay called when between CS domains.
Description of the drawings
From below in conjunction with the accompanying drawings to the present invention specific embodiment description in may be better understood the present invention wherein,
The same or similar reference numeral represents the same or similar feature.
Fig. 1 is the application scenarios schematic diagram of resource reservation control method in the embodiment of the present invention；
Fig. 2 is the flow chart of resource reservation control method that one embodiment of the invention provides；
Fig. 3 is the flow chart of resource reservation control method that another embodiment of the present invention provides；
Fig. 4 is the flow chart of resource reservation control method in further embodiment of this invention；
Fig. 5 is calling terminal of the prior art, called terminal is in CS domains and is exhaled using the negotiation of resource reservation form
The flow chart cried；
Fig. 6 is that calling terminal, called terminal in the embodiment of the present invention are in CS domains and reserve form using non-resource
The flow chart of consultation call；
Fig. 7 is the structure diagram of the MGCF units in one embodiment of the invention；
Fig. 8 is the structure diagram of the MGCF units 400 in another embodiment of the present invention.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, it is proposed that many details, in order to provide complete understanding of the present invention.But to those skilled in the art
It will be apparent that the present invention can be implemented in the case of some details in not needing to these details.Below to implementing
The description of example is used for the purpose of by showing that the example of the present invention is better understood from the present invention to provide.The present invention never limits
In any concrete configuration set forth below and algorithm, but cover under the premise of without departing from the spirit of the present invention element,
Any modification, replacement and the improvement of component and algorithm.In the the accompanying drawings and the following description, well known structure and skill is not shown
Art is unnecessary fuzzy to avoid causing the present invention.
The embodiment of the present invention provides a kind of resource reservation control method, the scene applied to the calling between VOLTE user.
Wherein, Fig. 1 is the application scenarios schematic diagram of resource reservation control method in the embodiment of the present invention, as shown in Figure 1, being related to caller
Terminal, called terminal and the corresponding IMS network of called terminal access MGCF units and pick out MGCF units, can also include
The corresponding CSCF of called terminal (Call Session Control Function, call session control function) units or AS
(Application Server, application server), can be represented with CSCF/AS.The message that calling terminal is sent out need by
The access MGCF units of the corresponding IMS network of called terminal and MGCF units are picked out, called terminal can be reached.Similarly, quilt
The message that terminal is sent to calling terminal is made to be also required to the access MGCF units by the corresponding IMS network of called terminal and pick out
MGCF units.The access MGCF units of the corresponding IMS network of called terminal with pick out MGCF units as the corresponding IMS of called terminal
It is located at the MGCF units of head and end in network.The network for accessing MGCF units in IMS network and picking out between MGCF units is equal
For cable network.
Fig. 2 is the flow chart of resource reservation control method that one embodiment of the invention provides, as shown in Fig. 2, resource reservation
Control method includes step 101- steps 103.
In a step 101, when called terminal resides in circuit commutative field (abbreviation CS domains), IMS network picks out MGCF
Unit receives the invitation message of calling called terminal.
When called terminal is resident in the cs domain, need to judge to send invitation message (i.e. INVITE message) to called terminal
Whether calling terminal is in CS domains, so as to judge whether to need to perform resource reservation according to whether calling terminal resides in CS domains
The call negotiation of (i.e. Precondition) form.
In a step 102, whether judge in invitation message comprising Session Border Controller domain sbc-domain parameters.
Wherein it is possible to it is to judge whether calling terminal is resident in the cs domain by where sending by invitation message.
If the invitation message is sent by the access MGCF units of the corresponding IMS network of called terminal, show that calling terminal is stayed
Stay in CS domains.If the invitation message is by the corresponding SBC of calling terminal (Session Border Controller, session side
Boundary's controller) send, then show that calling terminal resides in VOLTE domains.Specifically, can be by whether being included in invitation message
Sbc-domain parameters, to judge that invitation message is sent by the access MGCF units of the corresponding IMS network of called terminal,
Or it is sent by the corresponding SBC of calling terminal.
In step 103, it if it is determined that invitation message does not include sbc-domain parameters, then performs non-resource and reserves form
Call negotiation.
If not including sbc-domain parameters in invitation message, it is corresponding by called terminal to show invitation message
What the access MGCF units of IMS network were sent.Access MGCF units due to the corresponding IMS network of called terminal are with picking out MGCF
It is cable network between unit, there is no the radio resource allocation flows after calling of calling terminal and called terminal is connected.
Therefore the call negotiation that non-resource reserves (i.e. non-Precondition) form is carried out, can will carry out exhaling for resource reservation form
The time delay for negotiating to spend is made to save, reduces the time delay for being in being called between the calling terminal box called terminal in CS domains.Tool
Body, the call negotiation that non-resource reserves form can be performed using 183 message.
The embodiment of the present invention provides a kind of resource reservation control method, when called terminal resides in CS domains, IMS network
It picks out MGCF units and receives invitation message, judge whether comprising sbc-domain parameters in invitation message, if in invitation message not
Comprising sbc-domain parameters, show that the message request comes from the access MGCF units of IMS network, that is to say, that calling terminal
CS domains are also resided on, then the call negotiation of form is reserved using non-resource, do not need to carry out resource reservation step, so as to eliminate
Call negotiation the time it takes of resource reservation form is performed, when reducing calling terminal and called terminal and being between CS domains
The time delay called.
Fig. 3 is the flow chart of resource reservation control method that another embodiment of the present invention provides, Fig. 3 and Fig. 2 differences
It is, the flow chart of resource reservation control method shown in Fig. 3 can also include step 104.
At step 104, if it is determined that invitation message includes sbc-domain parameters, then the calling of resource reservation form is performed
Negotiate.
When judging that invitation message includes sbc-domain parameters, show that invitation message comes from the SBC of calling terminal, then
Show that calling terminal resides in VOLTE, need to carry out the call negotiation of Precondition resource reservation forms, to complete media
The preparation of resource.Specifically, the call negotiation of resource reservation form can be performed using 183 message.
Specifically, the process for performing the call negotiation of resource reservation form is specific as follows：Called terminal is returned to calling terminal
It returns 183 message calls and carries out Precondition resource reservation；Calling terminal sends PRACK message (i.e. temporarily to called terminal
Reply confirmation message), and carry out the resource reservation of calling terminal side；Called terminal is received after PRACK message to calling terminal
200OK message is returned, and carries out the resource reservation of called terminal side；Calling terminal is sent out after resource reservation is completed to called terminal
UPDATE notification messages (i.e. update notification message) are sent, after called terminal receives UPDATE notification messages, instead can to calling terminal
For the 200OK message of UPDATE notification messages, notice calling terminal called terminal side completes resource reservation.
Specifically, in an example in the above-described embodiments, judge whether join in invitation message comprising sbc-domain
Number, can by judge INVITE message P-Access-Network-Info header fields (i.e. access network information header field) whether
Include sbc-domain parameters.
The difference of flow charts of the Fig. 4 for resource reservation control method in further embodiment of this invention, Fig. 4 and Fig. 3 exist
In step 103 shown in Fig. 3 can specifically be refined as step 1031- steps 1033 in Fig. 4.
In step 1031, if it is determined that invitation message does not include sbc-domain parameters, then to the access MGCF of IMS network
Unit sends to invite and reply message.
Wherein, the requirement replied message require header fields is invited not indicate resource reservation, that is, represent not require calling terminal
User Agent Client (UAC, User Agent Client) support resource reservation.In one example, invitation replies message
SDP in do not include " a=curr ", " a=des " and " a=des ", at this point, the access MGCF units of IMS network with pick out
The media negotiation of MGCF units can only negotiate into non-resource and reserve form due to lacking the necessary form negotiated into resource reservation.
In a schematic example of the embodiment of the present invention, send to invite to the access MGCF units of IMS network and reply
The step of message, specifically can be implemented as sending to invite to the CSCF units or AS of called terminal replying message, so that CSCF
Unit or application server, which will invite, replies message the access MGCF units for being transmitted to IMS network.
In step 1032, initial address message (IAM) IAM is sent to the mobile switching centre of called terminal.
Wherein, the call negotiation that non-resource reserves form is performed, i.e., no longer carries out the call negotiation of resource reservation form.It can
Directly to send IAM (Initial to the MSC of called terminal (Mobile Switching Center, mobile switching centre)
Address Message, initial address message (IAM)) message, it is no longer necessary to resource reservation is waited for complete.
In step 1033, the address full information ACM that the mobile switching centre of called terminal sends is received.
Wherein, the MSC of called terminal can reply ACM message after the IAM message for picking out the transmission of MGCF units is received
(address complete message, address full information) picks out MGCF units and receives ACM message, represent that non-resource is reserved
The call negotiation of form terminates.
Fig. 5 is calling terminal of the prior art, called terminal is in CS domains and is exhaled using the negotiation of resource reservation form
The flow chart cried, wherein MSC A are the MSC of calling terminal, and MGCF A are the access MGCF units of IMS network, are called CSCF/AS
CSCF units or AS, MGCF B for called terminal are that IMS network picks out MGCF units, and MSC B are the MSC of called terminal.
As shown in figure 5, calling terminal, called terminal are in CS domains includes step using the process of the consultation call of resource reservation form
201- steps 218.
Step 201, MSC A send IAM message to MGCF A.
Step 202, MGCF A send INVITE message to called CSCF/AS.
Step 203, it is called CSCF/AS and sends INVITE message to MGCF B.
Step 204, MSC B send 183 message to called CSCF/AS.
Step 205, it is called CSCF/AS and sends 183 message to MGCF A.
Step 206, MGCF A send PRACK message to called CSCF/AS.
Step 207, it is called CSCF/AS and sends PRACK message to MGCF B.
Step 208, MGCF B send 200OK message to called CSCF/AS.
Step 209, it is called CSCF/AS and sends 200OK message to MGCF A.
Step 210, MGCF A send UPDATE message to called CSCF/AS.
Step 211, it is called CSCF/AS and sends UPDATE message to MGCF B.
Step 212, MGCF B send 200OK message to called CSCF/AS.
Step 213, it is called CSCF/AS and sends 200OK message to MGCF A.
Step 214, MGCF B send IAM message to MSC B.
Step 215, MSC B send ACM message to MGCF B.
Step 216, MGCF B send 180 message to called CSCF/AS.
Step 217, it is called CSCF/AS and sends 180 message to MGCF A.
Step 218, MGCF A send ACM message to MSC A.
Wherein, step 204- steps 213 are resource reservation process.It is passed between MGCF A, called CSCF/AS and MGCF B
The message passed can regard the message transmitted between MGCF A and MGCF B as.
Fig. 6 is that calling terminal, called terminal in the embodiment of the present invention are in CS domains and reserve form using non-resource
The flow chart of consultation call.Wherein MSC A are the MSC of calling terminal, and MGCF A are the access MGCF units of IMS network, are called
CSCF/AS is the CSCF units of called terminal or AS, MGCF B are that IMS network picks out MGCF units, and MSC B are called terminal
MSC.As shown in fig. 6, calling terminal, called terminal are in the process that the consultation call of form is reserved in CS domains using non-resource
Including step 301- steps 310.
Step 301, MSC A send IAM message to MGCF A.
Step 302, MGCF A send INVITE message to called CSCF/AS.
Step 303, it is called CSCF/AS and sends INVITE message to MGCF B.
Step 304, MSC B send 183 message to called CSCF/AS.
Step 305, it is called CSCF/AS and sends 183 message to MGCF A.
Step 306, MGCF B send IAM message to MSC B.
Step 307, MSC B send ACM message to MGCF B.
Step 308, MGCF B send 180 message to called CSCF/AS.
Step 309, it is called CSCF/AS and sends 180 message to MGCF A.
Step 310, MGCF A send ACM message to MSC A.
Wherein, the message transmitted between MGCF A, called CSCF/AS and MGCF B, can regard as MGCF A with
The message transmitted between MGCF B.
It is compared by Fig. 5 and Fig. 6 it is known that calling terminal, called terminal are in the use of CS domains in the embodiment of the present invention
The consultation call that non-resource reserves form does not need to carry out resource reservation, can simplify exhaling between calling terminal and called terminal
Flow is, so as to the time delay for reducing calling terminal and when called terminal is between CS domains is called.
Fig. 7 is the structure diagram of the MGCF units 400 in one embodiment of the invention, as shown in fig. 7, MGCF units 400
Including receiving module 401, judgment module 402 and non-resource is invited to reserve module 403.
Wherein, receiving module 401 is invited, when can be configured as called terminal and residing in circuit-switched CS domain, reception is exhaled
It is the invitation message of called terminal.
Whether judgment module 402 can be configured as judging in invitation message comprising Session Border Controller domain sbc-
Domain parameters.
Non-resource reserves module 403, can be configured as if it is determined that invitation message is then performed not comprising sbc-domain parameters
Non-resource reserves the call negotiation of form.
The embodiment of the present invention provides a kind of MGCF units, and when called terminal resides in CS domains, MGCF units reception is invited
Please message, whether judge in invitation message comprising sbc-domain parameters, if not including sbc-domain parameters in invitation message,
Show that the message request comes from the access MGCF units of IMS network, that is to say, that calling terminal also resides on CS domains, then uses
Non-resource reserves the call negotiation of form, does not need to carry out resource reservation step, and resource reservation form is performed so as to eliminate
Call negotiation the time it takes reduces the time delay called when calling terminal and called terminal are between CS domains.
The difference of structure diagrams of the Fig. 8 for the MGCF units 400 in another embodiment of the present invention, Fig. 8 and Fig. 7 exist
In MGCF units 400 shown in Fig. 8 further include resource reservation module 404.Wherein, resource reservation module 404 can be configured as
If it is determined that invitation message includes sbc-domain parameters, then the call negotiation of resource reservation form is performed.
In an example of the embodiment of the present invention, above-mentioned judgment module 402 can specifically be configured as judging invitation message
Access network information P-Access-Network-Info header fields whether contain sbc-domain parameters.
In another example of the embodiment of the present invention, above-mentioned non-resource is reserved module 403 and can be specifically configured as：To
The access MGCF units of IMS network send to invite and reply message, and the requirement replied message require header fields is invited not indicate resource
It is reserved；Initial address message (IAM) IAM is sent to the mobile switching centre of called terminal；Receive mobile switching centre's hair of called terminal
The address power sent replies message ACM.
In another example of the embodiment of the present invention, above-mentioned non-resource is reserved module 403 and can be specifically configured as：To quilt
Cry terminal call session control function CSCF units or application server send invite reply message so that CSCF units or
Application server will invite and reply message the access MGCF units for being transmitted to IMS network.
Structures described above frame functional block shown in figure can be implemented as hardware, software, firmware or their group
It closes.When realizing in hardware, it may, for example, be electronic circuit, application-specific integrated circuit (ASIC), appropriate firmware, insert
Part, function card etc..When being realized with software mode, element of the invention is used to perform program or the generation of required task
Code section.Either code segment can be stored in machine readable media program or the data-signal by being carried in carrier wave is passing
Defeated medium or communication links are sent." machine readable media " can include being capable of any medium of storage or transmission information.
The example of machine readable media includes electronic circuit, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), soft
Disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..Code segment can be via such as internet, inline
The computer network of net etc. is downloaded.
It needs clearly, the invention is not limited in specific configuration described above and shown in figure and processing.Also,
For brevity, the detailed description to known method technology is omitted here.In the above-described embodiments, it has been described and illustrated several
Specific step is as example.But procedure of the invention is not limited to described and illustrated specific steps, this field
Technical staff can be variously modified after the spirit for understanding the present invention, modification and addition or between changing the step
Sequence.
Claims (10)
1. a kind of resource reservation control method, which is characterized in that including：
When called terminal resides in circuit-switched CS domain, network protocol multi-media sub-system IMS network picks out Media Gateway
Control function MGCF units receive the invitation message for calling the called terminal；
Whether judge in the invitation message comprising Session Border Controller domain sbc-domain parameters；
If it is determined that the invitation message does not include sbc-domain parameters, then the call negotiation that non-resource reserves form is performed.
2. it according to the method described in claim 1, it is characterized in that, further includes：
If it is determined that the invitation message includes sbc-domain parameters, then the call negotiation of resource reservation form is performed.
3. according to the method described in claim 1, it is characterized in that, whether judge in the visit message comprising session border control
The step of device domain sbc-domain parameters processed, includes：
Judge whether the access network information P-Access-Network-Info header fields of the invitation message contain sbc-domain
Parameter.
4. it according to the method described in claim 1, is wrapped it is characterized in that, performing the step of non-resource reserves the call negotiation of form
It includes：
It sends to invite to the access MGCF units of network protocol multi-media sub-system IMS network and reply message, described invite is replied
The requirement require header fields of message do not indicate resource reservation；
Initial address message (IAM) IAM is sent to the mobile switching centre of the called terminal；
Receive the address full information ACM that the mobile switching centre of the called terminal sends.
5. it according to the method described in claim 4, is replied it is characterized in that, sending to invite to the access MGCF units of IMS network
The step of message, includes：
The invitation is sent to the call session control function CSCF units or application server of called terminal to reply message, so that
The CSCF units or the application server invitation is replied message be transmitted to the IMS network access MGCF it is mono-
Member.
6. a kind of MGCF units, which is characterized in that including：
Receiving module is invited, when being configured as called terminal and residing in circuit-switched CS domain, receives and calls the called terminal
Invitation message；
Judgment module is configured as judging in the invitation message whether joining comprising Session Border Controller domain sbc-domain
Number；
Non-resource reserves module, is configured as if it is determined that the invitation message then performs non-money not comprising sbc-domain parameters
Reserve the call negotiation of form in source.
7. MGCF units according to claim 6, which is characterized in that further include：
Resource reservation module, be configured as if it is determined that the invitation message include sbc-domain parameters, then perform resource reservation
The call negotiation of form.
8. MGCF units according to claim 6, which is characterized in that the judgment module is specifically configured to described in judgement
Whether the access network information P-Access-Network-Info header fields of invitation message contain sbc-domain parameters.
9. MGCF units according to claim 6, which is characterized in that the non-resource is reserved module and is specifically configured to：
It sends to invite to the access MGCF units of IMS network and reply message, it is described to invite the requirement require header fields replied message
Resource reservation is not indicated；
Initial address message (IAM) IAM is sent to the mobile switching centre of the called terminal；
Receive the address full information ACM that the mobile switching centre of the called terminal sends.
10. MGCF units according to claim 9, which is characterized in that the non-resource is reserved module and is specifically configured to：
The invitation is sent to the call session control function CSCF units or application server of called terminal to reply message, so that
The CSCF units or the application server invitation is replied message be transmitted to the IMS network access MGCF it is mono-
Member.
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| CN109905899A (en) * | 2019-02-13 | 2019-06-18 | Oppo广东移动通信有限公司 | A kind of IMS originating method, device and computer readable storage medium |
| CN110784930A (en) * | 2019-10-31 | 2020-02-11 | 维沃移动通信有限公司 | Call resource allocation method and device |
| CN112468982A (en) * | 2020-12-01 | 2021-03-09 | 维沃移动通信有限公司 | Calling method and calling device |
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| CN110784930A (en) * | 2019-10-31 | 2020-02-11 | 维沃移动通信有限公司 | Call resource allocation method and device |
| CN110784930B (en) * | 2019-10-31 | 2022-12-27 | 维沃移动通信有限公司 | Call resource allocation method and device |
| CN112468982A (en) * | 2020-12-01 | 2021-03-09 | 维沃移动通信有限公司 | Calling method and calling device |
| CN112468982B (en) * | 2020-12-01 | 2022-03-25 | 维沃移动通信有限公司 | Calling method and calling device |
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