CN100550936C - A kind of public telephone exchange network simulation service implementation method - Google Patents
A kind of public telephone exchange network simulation service implementation method Download PDFInfo
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- CN100550936C CN100550936C CN200510085217.8A CN200510085217A CN100550936C CN 100550936 C CN100550936 C CN 100550936C CN 200510085217 A CN200510085217 A CN 200510085217A CN 100550936 C CN100550936 C CN 100550936C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
- H04M7/0066—Details of access arrangements to the networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1101—Session protocols
- H04L65/1104—Session initiation protocol [SIP]
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Abstract
The invention discloses public telephone exchange network simulation service implementation method and system, comprise: the PSTN Service Control Unit sends the corresponding trigger event subscribe request of traffic performance that can be employed with the POTS terminal to the POTS terminal, and described trigger event subscribe request indicates the incident bag type of ordered trigger event; The sip user agent node receives the triggering signal that described trigger event bag is described, and sends sip message to the PSTN Service Control Unit, and described sip message indicates this POTS terminal and sends triggering signal; The PSTN Service Control Unit indicates according to described sip message, triggers the business that the POTS terminal can be employed.By the solution of the present invention, conventional P OTS terminal still can be used PSTN simulation services after accessing to and using the packet-based core networks of SIP as call control signalling.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of public telephone exchange network simulation service implementation method.
Background technology
At present, continuous maturation along with group technology, develop based on Circuit-switched conventional telecommunication network towards broadband telecommunication net based on packet switching, the grouping telecommunications network is prepared or set up in a lot of operations commercial city, though it is developing tendency in future that the user uses the packet communications terminal to insert the grouping telecommunications network, but operator is in the process of construction of grouping telecommunications network, also can not hope for the replacing terminal equipment that all contracted users can be unified, therefore the grouping telecommunications network of present stage must be supported the access of conventional P OTS terminal at least, and the telecommunications network that divides into groups so just needs the PSTN business of inheriting tradition.
We know, the application of a lot of PSTN supplementary services is that the analog subscriber signaling is closely-related, trigger by off hook signal as hot line service, business such as Call Waiting and Three-Way Calling are to carry out man-machine interaction and use professionally by hooking (hooking) mode, the call control signalling in the telecommunications network that therefore divides into groups must be supported the transmission to the related service information of analog subscriber signalings such as off hook signal, hooking signal.
General, conventional P OTS terminal can access to the grouping telecommunications network by certain network insertion node device, finishes translating of analog subscriber signaling and grouping signaling by this equipment.Current, the most ripe commercial solution is that the POTS terminal is accessed to the grouping telecommunications network by the user media gateway, transmits the related service information of analog subscriber signaling by agreement H.248, to reach the succession of grouping telecommunications network to the traditional PSTN business.
But on the other hand, we also know, using SIP is one of current technology trends as the call control signalling of grouping telecommunications core network, as ITU-T and ETSI the standard of NGN is worked out, therefore when conventional P OTS terminal accesses to use SIP as the packet-based core networks of call control signalling, will consider how Session Initiation Protocol transmits the relevant information of analog subscriber signaling.
With SIP as shown in Figure 1 as the cellular logic structure of the packet-based core networks of call control signalling:
Wherein:
1. the user media switching node provides the mutual translation function of circuit speech and packet voice between POTS terminal and packet domain, supports the codec functions of packet voice.
2.SIP user agent's node is the POTS terminal to be inserted with SIP is the sip user agent (SIP UA) of the packet domain of call control signalling, when user media switching node and sip user agent node were different network entity, H.248 E1 interface between the two for waiting MGCP; When network insertion node and sip user agent node were same network entity, the E1 interface was self-defining internal interface.
3. the network insertion node is the network node that the functions such as authentication registration authentication that insert packet-based core networks are provided to the POTS terminal, with the POTS endpoint registration to different calling conversation control unit, when the POTS terminal made a call, the network insertion node routed the call to the calling conversation control unit of its ownership.When network insertion node and sip user agent node were different network entity, E2 interface between the two was SIP; When network insertion node and sip user agent node were same network entity, the E2 interface was SIP or self-defining internal interface.General, when user media switching node and sip user agent node were different network entity, sip user agent node and network insertion node often were same network entities.
4. calling conversation control unit provides functions such as calling control, route continue for the registered user's (comprising the POTS terminal use) who inserts packet-based core networks, and it can be toggled to Service Control Unit with calling.E6 interface between two calling conversation control unit is SIP.When calling conversation control unit and network insertion node were different network entity, E3 interface between the two was SIP; When calling conversation control unit and network insertion node were same network entity, the E3 interface was SIP or self-defining internal interface.
5. Service Control Unit provides miscellaneous service logic control function for the registered user who inserts packet-based core networks, be host's execution environment of miscellaneous service, the PSTN Service Control Unit promptly is the Service Control Unit that the logic control of PSTN simulation services is provided for the POTS terminal use.When Service Control Unit and calling conversation control unit were different network entity, E4 interface between the two was SIP; When Service Control Unit and calling conversation control unit were same network entity, the E4 interface was SIP or self-defining internal interface.Can there be the Service Control Unit of a plurality of processing different business to exist.
6. the media resource control unit provides (comprising the POTS terminal use) controlled function such as application, application, release of various media resources for the registered user who inserts packet-based core networks, as signal tone and verbal announcement resource, conferencing resource, number receiving resource etc.When media resource control unit and calling conversation control unit were different network entity, E5 interface between the two was SIP; When media resource control unit and calling conversation control unit were same network entity, the E5 interface was SIP or self-defining internal interface.
7. the media gateway controlling unit provides the intercommunication controlled function for registered user's (comprising the POTS terminal use) and the mutual calling between the traditional PSTN network user that inserts packet-based core networks, finishes translating of SIP and other call control protocol.When media gateway controlling unit and calling conversation control unit were different network entity, E7 interface between the two was SIP; When media gateway controlling unit and calling conversation control unit were same network entity, the E7 interface was SIP or self-defining internal interface.
In the NGN standard that ITU-T and ETSI are working out, conventional P OTS terminal is accessed to NGN and is its traditional PSTN business that provides by NGN, be called PSTN simulation services (EmulationService), that is to say, in NGN, business such as above-mentioned hot line, Call Waiting, Three-Way Calling still will be provided for the POTS terminal use who inserts, because the user still uses the POTS terminal, so user's occupation mode of these PSTN simulation services does not change yet.Therefore, as previously mentioned, the information transmission that Session Initiation Protocol will be supported analog subscriber signalings such as off hook signal, hooking signal could realize these PSTN simulation services.
Though Session Initiation Protocol itself provides SUBSCRIBE/NOTIFY mechanism to address this problem, the incident bag that is carried by the SIP NOTIFY transmits the related service information of analog subscriber signaling, but above-mentioned traditional PSTN supplementary services such as hot line, Call Waiting and Three-Way Calling this moment do not have corresponding implementation, and how transmitting the analog subscriber signaling information does not have related description yet.
Summary of the invention
The invention provides a kind of public telephone exchange network simulation service implementation method, access to when using SIP, can not realize the problem of PSTN simulation services well as the packet-based core networks of call control signalling in order to solve the conventional P OTS terminal that exists in the prior art.
The inventive method comprises:
A kind of Public Switched Telephone Network artificial service implementation method may further comprise the steps:
The PSTN Service Control Unit sends the corresponding trigger event subscribe request of traffic performance that can be employed with the POTS terminal to the POTS terminal, described traffic performance is that the POTS terminal is given in advance, and described trigger event subscribe request uses the header field of sip message to indicate the incident bag type of ordered trigger event;
The sip user agent node receives described sip message and resolves through calling conversation control unit, creates the subscription example of described trigger event bag for the POTS terminal;
The sip user agent node receives the triggering signal of the described trigger event bag description of POTS terminal transmission, sends sip message to the PSTN Service Control Unit, and described sip message indicates this POTS terminal and sends triggering signal;
The sip user agent node receives the described triggering signal of the described trigger event bag description of POTS terminal transmission;
The PSTN Service Control Unit is resolved described sip message, triggers the business that the POTS terminal can be employed.Described triggering signal is the off hook signal of analog subscriber signaling.
Described business is hot line service or meets the busy business of depositing.
The traffic performance of described POTS terminal is: the POTS terminal use successfully registers hot line service or meets the busy business of depositing.
Described business is that POTS terminal use off-hook is listened special prompt sound service or verbal announcement business.
The traffic performance of described POTS terminal is: the POTS terminal use successfully activates MWI, or the POTS terminal use successfully registers unconditioned call connection, or the POTS terminal use successfully registers dialing restriction or interruption-free or absence or phone locking or the POTS terminal use enters the arrearage state or the POTS terminal use becomes Centrex user or little friendship user.
After the business that PSTN Service Control Unit triggering POTS terminal can be employed, also comprise:
The PSTN Service Control Unit starts the subscriber dialing that timer monitors the POTS terminal;
If described timer expiry, the POTS terminal use is dialing not, the PSTN Service Control Unit sends REFER message to the sip user agent node, and indication sip user agent node is to described hot line or meet and busyly deposit the hot line number of successfully registration or meet the busy number of depositing and initiate a new SIP initial session request; Or PSTN Service Control Unit thermotropism wire size sign indicating number or the busy number transmission REFER message of depositing of chance, the indication latter initiates a new SIP initial session request to the POTS terminal use.
Behind the traffic performance that described PSTN Service Control Unit triggering POTS terminal can be employed, also comprise:
The PSTN Service Control Unit sends REFER message to the sip user agent node, and indication sip user agent node is initiated a new SIP initial session request to the media resource of special prompt tone or voice suggestion; Or the PSTN Service Control Unit indicates the media resource of special prompt tone or voice suggestion to initiate a new SIP initial session request to the POTS terminal use to the media resource transmission REFER of special prompt tone or voice suggestion message.
Described triggering signal is the hooking signal of analog subscriber signaling.
Described business is Call Waiting or Three-Way Calling or conference telephone or hooking calling transfer or searches malicious call or calling back when busy or the busy hooking business of depositing of chance.
The traffic performance that described POTS terminal can be employed is: the POTS terminal use successfully opens the hooking service authority or successfully registers the hooking business or the POTS terminal use is online.
The one or more triggering signals of described trigger event bag type specification.
Pass through the solution of the present invention, after conventional P OTS terminal accesses to and uses the packet-based core networks of SIP as call control signalling, still can use hot line, meet and busyly to deposit, Call Waiting, Three-Way Calling, conference telephone, calling transfer, search malicious call, calling back when busy etc., make the user on professional inheritance, obtain favorable experience according to off hook signal, the mutual PSTN simulation services of hooking signal.
Description of drawings
Fig. 1 is the cellular logic structural representation of use sip message of the prior art as the packet-based core networks of call control signalling;
Fig. 2 is the overall procedure schematic diagram of technical solution of the present invention;
Fig. 3 is the schematic flow sheet of the embodiment of the invention 1;
Fig. 4 is the schematic flow sheet of the embodiment of the invention 2.
Embodiment
Below in conjunction with Figure of description the specific embodiment of the present invention is described.
Embodiments of the invention, the explanation mutual and that be correlated with according to the realization of the mutual PSTN simulation services of hooking signal with the foundation off hook signal respectively.As shown in Figure 2, be overall procedure schematic diagram of the present invention, as seen from the figure, the present invention comprises the steps: generally
S1, Plain Old Telephone Service terminal are endowed certain traffic performance that can be employed.
If the POTS terminal use will use PSTN simulation services, then must give the corresponding business characteristic that the POTS terminal can be employed, will use hot line such as the user, then the user must earlier successfully register the hot line number, the hot line characteristic that the POTS terminal is had can be employed; The user will listen the voice suggestion that newer message is arranged behind the off-hook when receiving newer message message for another example, and then the user must successfully activate message indicator service earlier, makes the POTS terminal have the off-hook that can be employed and listens the voice suggestion characteristic; The user will use Three-Way Calling for another example, and then the user must successfully open earlier the service authority of Three-Way Calling, the Three-Way Calling characteristic that the POTS terminal is had can be employed, etc.To different PSTN simulation services, the method that the POTS terminal is endowed the traffic performance that can be employed accordingly is also different, is not described in detail at this.
S2, PSTN Service Control Unit are initiated corresponding trigger event subscribe request to the described traffic performance that is employed of POTS terminal, send sip message to this POTS terminal, and described sip message indicates the incident bag type of ordered trigger event by header field.
In the solution of the present invention, need initiate corresponding trigger event subscribe request to the traffic performance that the POTS terminal can be employed, SIP SUBSCRIBE message is used in this request, in the Event header field of described SIP SUBSCRIBE message, indicate the incident bag type of ordered trigger event, as off hook signal incident bag, hooking signal event bag etc.
S3, sip user agent node receive described sip message and resolve through calling conversation control unit, create the subscription example of described trigger event bag for the POTS terminal.
S4, sip user agent node receive the triggering signal of the described trigger event bag description of POTS terminal transmission, send sip message to the PSTN Service Control Unit, and described sip message indicates this POTS terminal by header field with the incident bag that carries and sends triggering signal.
When the POTS terminal use uses the traffic performance that can be employed, it sends relevant triggering signal, this triggering signal is to describe by having created the trigger event bag of subscribing to example, as the description of off hook signal incident bag is exactly off hook signal, be converted to the SIP NOTIFY by the sip user agent node, send to the PSTN Service Control Unit.Indicate this POTS terminal by header field with the incident bag that carries at this SIP NOTIFY and send triggering signal.
S5, PSTN Service Control Unit are resolved described sip message, and trigger the described traffic performance that is employed of POTS terminal.
After the PSTN Service Control Unit is received this SIP NOTIFY, resolve described SIP NOTIFY, the incident bag that information of carrying according to SIP NOTIFY Event header field and SIP NOTIFY carry, as off hook signal incident bag, judge that this POTS terminal sent the relative trigger signal, as off hook signal, trigger the described traffic performance that is employed of this POTS terminal, and provide related service for the POTS terminal.
Embodiment 1: according to the mutual PSTN simulation services of off hook signal.
Typically hot line service is arranged, meet to hurry and deposit business according to the mutual PSTN simulation services of off hook signal, the definition of these two business can be referring to the total technical specification book of Ministry of Posts and Telecommunications's telephony switching gear.
The application of these two business is very similar, and registration that different is is that example is described application flow and the off hook signal incident packet format by the mutual PSTN simulation services of off hook signal with the hot line service with to cancel mode different below.
Omitted the network insertion node among Fig. 3, when network insertion node and sip user agent node were different network entity, calling will be through the network insertion node.Need to prove: the explanation that flow process diagram of being done among the present invention and explanatory note are only done for outstanding key technology of the present invention, do not represent a complete calling and professional control flow, there is not all possible branch of limit flow process yet; And incident packet format that the sip message of describing carries and title only for outstanding its analog subscriber signaling information that must carry, do not represent that this is unique describing mode.
As can be seen from Fig. 3, this flow process mainly comprises the steps:
S11, POTS terminal use off-hook, dialing is initiated hot line registration request, as is pressed the Chinese national standard definition, dials " * 52*TN# ", and wherein TN is the hot line Subscriber Number of wishing registration;
S12, sip user agent node are translated into sip message with the calling that the POTS terminal use initiates, and initiate the request of SIP initial call, send INVITE to calling conversation control unit;
S13, calling conversation control unit as called number prefix, are toggled to INVITE the PSTN Service Control Unit of handling hot line service according to certain mode;
S14, PSTN Service Control Unit carry out number analysis, carry out the service logic control of hot line registration,, then note corresponding hot line Subscriber Number TN if this POTS terminal use's hot line can be registered success, and reply INVITE, send the 200OK answer code to calling conversation control unit;
S15, calling conversation control unit are replied the 200OK answer code of INVITE to the transmission of sip user agent node;
S16, sip user agent node send the ACK acknowledge message;
S17, calling conversation control unit are transmitted the ACK acknowledge message to the PSTN Service Control Unit;
After S18, hot line were registered successfully, the PSTN Service Control Unit was initiated the subscribe request to " off hook signal " incident of POTS terminal use, sends SUBSCRIBE message to this user;
The present invention is defined as follows for " off hook signal " incident bag:
signal-offhook＝offhook-status-line?CRLF
[offhook-account?CRLF]
offhook-status-line＝″Off-Hook″HCOLON?offhook-statue
offhook-status＝″yes″/″no″
offhook-account＝″Offhook-Account″HCOLON?Account-URI
Account-URI＝SIP-URI/SIPS-URI/absoluteURI
Wherein, off hook signal incident bag type is named as signal-offhook, represents whether sent off hook signal and comprise two parameter Off-Hook in the incident bag, and Offhook-Account represents to send the POTS terminal iidentification of off hook signal.
Therefore in this SUBSCRIBE message, must point out events subscribed bag type in " Event " header field, off hook signal incident bag is subscribed in expression:.
Event：signal-offhook
S19, calling conversation control unit are transmitted SUBSCRIBE message to the sip user agent node;
S110, sip user agent node receive and resolve this SUBSCRIBE message, and the subscription example for the POTS terminal use creates " off hook signal " returns expression and subscribes to successful 200OK answer code;
S111, calling conversation control unit are transmitted the 200OK answer code to the PSTN Service Control Unit, and the PSTN Service Control Unit receives this 200OK answer code, finishes the subscription procedure of " off hook signal ";
S112, POTS terminal use use hot line service, off-hook (not dialling);
S113, sip user agent node receive POTS terminal use's off hook signal, judge the subscription example that has this user's " off hook signal ", then send NOTIFY, notify this user to send " off hook signal " to subscriber's (PSTN Service Control Unit);
According to " off hook signal " incident packet format of above-mentioned definition, the following setting of " Event " header field in the NOTIFY:
Event：signal-offhook
The incident bag that carries in the NOTIFY is as follows:
Off-Hook：yes
The POTS terminal use number of Offhook-Account:URI form
S114, calling conversation control unit as incident bag type signal-offhook, are sent to NOTIFY the PSTN Service Control Unit of handling hot line service according to certain mode;
S115, PSTN Service Control Unit receive and are resolved to this NOTIFY, the subscription that judgement was sent " off hook signal " to this POTS terminal use, learn that this POTS terminal use has initiated the off-hook operation, and this user has registered hot line service, then start a timer T1 for this user, timer duration is the wait duration (as 5 seconds) of hot line service regulation, returns the 200OK answer code that expression receives the NOTIFY success at last;
S116, calling conversation control unit are transmitted the 200OK answer code to the sip user agent node, and the sip user agent node receives the 200OK answer code, finish the notification procedure of " off hook signal ";
POTS terminal use's T1 timer expiry on S117, the PTSN Service Control Unit, this user not dialing makes a call, the PSTN Service Control Unit takes out the hot line Subscriber Number TN of this user's registration, send REFER message to this user, the sip user agent node is made a call from this TN number of trend, and the TN number can carry by " Refer-To " header field in the REFER message;
S118, calling conversation control unit are transmitted REFER message to the sip user agent node;
S119, sip user agent node receive and resolve this REFER message, the TN number that carries in " Refer-To " header field is initiated a new SIP initial call request, send INVITE to calling conversation control unit, calling conversation control unit receives this INVITE, as a common SIP call treatment, as the triggering of managing business, route continue etc.;
S120, the loopback of sip user agent node represent to receive the 200OK answer code of REFER message success;
S121, calling conversation control unit are transmitted the 200OK answer code to the PSTN Service Control Unit;
S122, owing to press Session Initiation Protocol, there is limited subscription period (being specified by " Expires " header field in the SUBSCRIBE message) in the subscription example that SUBSCRIBE message is represented, for making before the POTS terminal use cancels the hot line registration, this subscription example exists always, the PSTN Service Control Unit must periodically refresh the subscription example, be the PSTN Service Control Unit regular send SUBSCRIBE message to this POTS terminal use, subscribe to its " off hook signal " incident;
S123, calling conversation control unit are transmitted SUBSCRIBE message to the sip user agent node;
S124, sip user agent node receive and resolve this SUBSCRIBE message, refresh the subscription period of " off hook signal " subscription example of this POTS terminal use, return expression and subscribe to successful 200OK answer code;
S125, calling conversation control unit are transmitted the 200OK answer code to the PSTN Service Control Unit, and the PSTN Service Control Unit receives this 200OK answer code, finishes the subscription procedure that refreshes of " off hook signal ";
S126, POTS terminal use off-hook, dialing is initiated hot line and is cancelled request, as presses the Chinese national standard definition, dials " #52# ";
S127, sip user agent node are translated into sip message with the calling that the POTS terminal use initiates, and initiate the request of SIP initial call, send INVITE to calling conversation control unit;
S128, calling conversation control unit are toggled to the PSTN Service Control Unit with INVITE;
S129, PSTN Service Control Unit carry out number analysis, carry out the service logic control that hot line is cancelled, and reply INVITE, send the 200OK answer code to calling conversation control unit;
S130, calling conversation control unit are replied the 200OK answer code of INVITE to the transmission of sip user agent node;
S131, sip user agent node send the ACK acknowledge message;
S132, calling conversation control unit are transmitted the ACK acknowledge message to the PSTN Service Control Unit;
After S133, hot line were cancelled successfully, the PSTN Service Control Unit was initiated the request of cancelling subscriptions to " off hook signal " incident of POTS terminal use, sends SUBSCRIBE message to this user, and " Expires " header field value in the message is 0;
S134, calling conversation control unit are transmitted SUBSCRIBE message to the sip user agent node;
S135, sip user agent node receive and resolve this SUBSCRIBE message, according to " Expires " header field value is 0 to judge that this is a request of cancelling subscriptions, then cancel this POTS terminal use " off hook signal " and subscribe to example, return expression and subscribe to the successful 200OK answer code of cancellation;
S136, calling conversation control unit are transmitted the 200OK answer code to the PSTN Service Control Unit, and the PSTN Service Control Unit receives this 200OK answer code, finish the subscription cancellation process of " off hook signal ".
Meet and busyly to deposit operation flow and compare with the hot line service flow process, only different with the mode of cancelling in registration, PSTN Service Control Unit subscription just is different with the trigger condition of cancellation " off hook signal " incident, so the present invention no longer specifically describes, and meeting hurries deposits the artificial service flow process.
Embodiment 2, mutual according to off hook signal, the PSTN simulation services of pointing out behind the off-hook.
Two kinds of PSTN simulation services of previous embodiment 1 explanation are directly to have triggered hot line according to off hook signal and met busy application flow of depositing, in addition, we know, in traditional PSTN business, the main effect of off hook signal is to send dialing tone to the off-hook user behind the off-hook, and the POTS terminal use listens behind off-hook the common dialing tone, also has following two kinds of possibilities:
1, listens a kind of special dialing tone or one section verbal announcement behind the off-hook.Work as subscriber arrearage, new message is arranged in the Voice Mailbox, the user has registered the unconditioned call connection business, the user has registered Digital Lock Service, the user has registered 'no disturbance ' service, the user has registered absent business, the user has registered the phone latching service, the user is Centrex group user, when the user is little friendship user etc., behind the POTS terminal use off-hook, listen certain special dialing tone or one section verbal announcement, as " arrearage of your phone ", " your Voice Mailbox has newer message " etc., and this special dialing tone can be according to above-mentioned different scene and difference, as listening " a unconditioned call connection registration special dial tone ", " phone locking special dial tone ", " Centrex group's special dial tone " etc.
2, the pleasant to the ear secondary dial tone that dials.After transfering to group prefix as Centrex group user, listen secondary dial tone.
Promptly after the POTS terminal has had certain traffic performance, need point out to it immediately or at during dialing behind its off-hook, prompting mode is to send a kind of special dialing tone or one section verbal announcement, or send secondary dial tone at during dialing.
Provide a Centrex group user who has registered the unconditioned call connection business below and initiated out the flow process of groupcall, user's off-hook is listened " unconditioned call connection registration special dial tone ", transfers to group's prefix, listens " secondary dial tone ", dial group's External Number first place, dialing tone stops.
As shown in Figure 4, be that the present invention is mutual according to off hook signal, the schematic flow sheet of the PSTN simulation services of pointing out behind the off-hook, as seen from the figure, its flow process mainly may further comprise the steps:
S21, POTS terminal use are Centrex group users, and the PSTN Service Control Unit is subscribed to outgoing prefix dialer event and the first dialer event of group's External Number by the KPML form when this user is online;
As previously mentioned, Centrex group user will listen secondary dial tone after transfering to group prefix, and behind group group's External Number first place, secondary dial tone stops, and therefore must subscribe to this two incidents.Wherein, KPML is a kind of button SGML with the XML language description, the PSTN Service Control Unit is initiated the SUBSCRIBE subscribe message to this POTS terminal use, subscription event type in the message is " kpml ", and the dialing pattern that description need be subscribed in message body (outgoing prefix and group's External Number first place), concrete KPML can consult the relevant draft among the IETF, and the present invention no longer specifically describes.
S22, calling conversation control unit are transmitted SUBSCRIBE message;
S23, sip user agent node receive and resolve SUBSCRIBE message, and the subscription example for the POTS terminal use creates " kpml " incident returns expression and subscribes to successful 200OK answer code;
S24, calling conversation control unit are transmitted the 200OK answer code and are given the PSTN Service Control Unit;
S25, when the POTS terminal use registers the professional success of unconditioned call connection, the PSTN Service Control Unit is initiated the subscribe request to " off hook signal " incident of this user, sends SUBSCRIBE message, the description of " off hook signal " incident as previously mentioned;
S26, calling conversation control unit are transmitted SUBSCRIBE message;
S27, sip user agent node receive and resolve SUBSCRIBE message, and the subscription example for the POTS terminal use creates " off hook signal " incident returns expression and subscribes to successful 200OK answer code;
S28, calling conversation control unit are transmitted the 200OK answer code and are given the PSTN Service Control Unit;
S29, POTS terminal use off-hook;
S210, sip user agent node receive POTS terminal use's off hook signal, judge the subscription example that has this user's " off hook signal ", then send NOTIFY to subscriber's (PSTN Service Control Unit), notify this user to send " off hook signal ", " off hook signal " incident packet format as previously mentioned;
S211, calling conversation control unit are transmitted NOTIFY;
S212, PSTN Service Control Unit receive and are resolved to this NOTIFY, judge the subscription that this POTS terminal use was sent " off hook signal ", learn that this POTS terminal use has initiated the off-hook operation, return to receive successful 200OK answer code;
S213, calling conversation control unit are transmitted the 200OK answer code;
S214, PSTN Service Control Unit are behind the POTS terminal use's who receives off hook signal, the indication user listens " unconditioned call connection registration special dial tone ", send REFER message to this user, the sip user agent node can be made a call to the media resource control unit, in " method " of " Refer-To " header field parameter, be indicated as being " INVITE " message, and " unconditioned call connection registration special dial tone " can be shown in " Refer-To " header field with the URI address table directly; Or the address of a presentation medium resource control unit in " Refer-To " header field, and the concrete sound type of playing " unconditioned call connection registration special dial tone " is illustrated in the message body;
S215, calling conversation control unit are transmitted REFER message;
S216, sip user agent node receive and resolve REFER message, and loopback represents to receive successful 200OK answer code;
S217, calling conversation control unit are transmitted the 200OK answer code;
S218, sip user agent node send SIPINVITE message to the media resource control unit conversation request that makes a call, and " unconditioned call connection registration special dial tone " play in application;
S219, calling conversation control unit are transmitted INVITE;
The 200OK response sign indicating number of replying is represented in S220, the loopback of media resource control unit;
S221, calling conversation control unit are transmitted 200OK response sign indicating number;
S222, the loopback of sip user agent node receive the ACK acknowledge message of 200OK response sign indicating number success;
S223, calling conversation control unit are transmitted the ACK acknowledge message and are given the media resource control unit, and the SIP session is set up successfully, and the POTS terminal use listens " unconditioned call connection registration special dial tone ";
S224, POTS terminal use then dial the Centrex outgoing prefix, as " 0 ";
S225, sip user agent node receive the outgoing prefix number that the POTS terminal use is dialled, judge the subscription example that has this user's " kpml ", and the dialing pattern of coupling subscription, the match is successful, then send NOTIFY to subscriber's (PSTN Service Control Unit), notify this user to send " kpml " incident, carry the outgoing prefix number in the message body;
S226, calling conversation control unit are transmitted NOTIFY;
S227, PSTN Service Control Unit receive and are resolved to this NOTIFY, the subscription that judgement was sent " kpml " to this POTS terminal use, from message body, receive the outgoing prefix number that this POTS terminal use is dialled, carry out number analysis and judge that number is an outgoing prefix, return and receive successful 200OK answer code;
S228, calling conversation control unit are transmitted the 200OK answer code;
S229, PSTN Service Control Unit are at first controlled the media resource control unit and are stopped to play " unconditioned call connection registration special dial tone ", send REFER message to the sip user agent node, in " method " of " Refer-To " header field parameter, be indicated as being " BYE " message;
S230, calling conversation control unit are transmitted REFER message;
S231, sip user agent node receive and resolve REFER message, and loopback represents to receive successful 200OK answer code;
S232, calling conversation control unit are transmitted the 200OK answer code;
S233, sip user agent node are BYE according to the method method of REFER message indication, initiate BYE message to the media resource control unit, discharge the session of " unconditioned call connection registration special dial tone ";
S234, calling conversation control unit are transmitted BYE message;
S235, media resource control unit discharge the session of " unconditioned call connection registration special dial tone ", and loopback discharges successful 200OK answer code;
S236, calling conversation control unit are transmitted the 200OK answer code;
S237, PSTN Service Control Unit control media resource control unit are play " secondary dial tone " to the user, send REFER message to the sip user agent node, are indicated as being " INVITE " message in " method " of " Refer-To " header field parameter;
S238, calling conversation control unit are transmitted REFER message;
S239, sip user agent node receive and resolve REFER message, and loopback represents to receive successful 200OK answer code;
S240, calling conversation control unit are transmitted the 200OK answer code;
S241, sip user agent node send SIPINVITE message to the media resource control unit conversation request that makes a call, and " secondary dial tone " play in application;
S242, calling conversation control unit are transmitted INVITE;
The 200OK response sign indicating number of replying is represented in S243, the loopback of media resource control unit;
S244, calling conversation control unit are transmitted 200OK response sign indicating number;
S245, the loopback of sip user agent node receive the ACK acknowledge message of 200OK response sign indicating number success;
S246, calling conversation control unit are transmitted the ACK acknowledge message and are given the media resource control unit, and the SIP session is set up successfully, and the POTS terminal use listens " secondary dial tone ";
S247, POTS terminal use then dial the first place of group's External Number;
S248, sip user agent node receive group's External Number first place that the POTS terminal use is dialled, judge the subscription example that has this user's " kpml ", and the dialing pattern of coupling subscription, the match is successful, then send NOTIFY to subscriber's (PSTN Service Control Unit), notify this user to send " kpml " incident, carry group External Number first place in the message body;
S249, calling conversation control unit are transmitted NOTIFY;
S250, PSTN Service Control Unit receive and are resolved to this NOTIFY, the subscription that judgement was sent " kpml " to this POTS terminal use, from message body, receive group's External Number first place that this POTS terminal use is dialled, return and receive successful 200OK answer code;
S251, calling conversation control unit are transmitted the 200OK answer code;
S252, PSTN Service Control Unit are at first controlled the media resource control unit and are stopped to play " secondary dial tone ", send REFER message to the sip user agent node, are indicated as being " BYE " message in " method " of " Refer-To " header field parameter;
S253, calling conversation control unit are transmitted REFER message;
S254, sip user agent node receive and resolve REFER message, and loopback represents to receive successful 200OK answer code;
S255, calling conversation control unit are transmitted the 200OK answer code;
S256, sip user agent node are BYE according to the method method of REFER message indication, initiate BYE message to the media resource control unit, discharge the session of " secondary sound ";
S257, calling conversation control unit are transmitted BYE message;
S258, media resource control unit discharge the session of " secondary dial tone ", and loopback discharges successful 200OK answer code;
S259, calling conversation control unit are transmitted the 200OK answer code;
Embodiment 3: according to the mutual PSTN simulation services of hooking signal.
Typically have according to the mutual PSTN simulation services of hooking signal: Call Waiting, Three-Way Calling, conference telephone, calling transfer, search that malicious call, calling back when busy, chance are busy deposits etc., professional definition all can be referring to the total technical specification book of Ministry of Posts and Telecommunications's telephony switching gear.The concrete interactive mode of hooking signal in these business has three kinds:
1, dials a specific service code behind the hooking, activate a professional registration, deposit with meeting to hurry as calling back when busy.
2, dial a specific numeral or service code behind the hooking, activate a service application mode, as Call Waiting, Three-Way Calling, search malicious call.
3, dial a called number behind the hooking, initiate a new calling, as Three-Way Calling, conference telephone and calling transfer.
As can be seen, no matter be which kind of PSTN simulation services, realize correctly that the sip user agent node all must pass to the PSTN Service Control Unit by the incident bag that NOTIFY carries with the hooking signal.And according to the SUBSCRIBE/NOTIFY mechanism of SIP, before this, the PSTN Service Control Unit must be subscribed to " hooking signal " incident of POTS terminal use earlier to the sip user agent node.
In aforesaid hot line service flow process, the user is after the success of registration hot line, just need " off hook signal " reported PSTN Service Control Unit (domestic consumer there is no need to do this processing), therefore can dial service code according to the user and register and cancel the trigger condition that is used as " off hook signal " event subscription and cancels subscriptions, but concerning the mutual PSTN simulation services of foundation hooking signal, as long as the user can hooking, just need " hooking signal " reported the PSTN Service Control Unit, therefore, to " hooking signal " event subscription and the trigger condition that cancels subscriptions following dual mode can be arranged:
1, the POTS terminal use is at the online and off-line of packet domain, as " hooking signal " event subscription and the trigger condition that cancels subscriptions.Online and off-line comprises: user's registration and unregistration, system conciliate obturation etc. to user's obturation.
2, the POTS terminal use opens or when cancelling the service authority of above-mentioned a kind of business, as " hooking signal " event subscription and the trigger condition that cancels subscriptions.
No matter be the trigger condition of which kind of mode, it all is identical to " hooking signal " event subscription of POTS terminal use with the process that cancels subscriptions that the PSTN Service Control Unit uses SUBSCRIBE message.
Since the PSTN Service Control Unit to POTS terminal use's " hooking signal " event subscription and cancel subscriptions (comprise and refresh subscription) and the sip user agent node to the notice reporting of " hooking signal " incident, similar with the flow process of aforesaid " off hook signal ", the present invention no longer describes its flow process.
The present invention is defined as follows for " hooking signal " incident bag:
signal-flashhook＝flash-status-line?CRLF
[flash-account?CRLF]
flash-status-line＝“Flash-Hook”HCOLON?flash-status
flash-status＝″yes″/″no″
flash-account＝“Flash-Account”HCOLON?Account-URI
Account-URI＝SIP-URI/SIPS-URI/absoluteURI
Wherein, hooking signal event bag type is named as signal-flashhook, represents whether sent the hooking signal and comprise two parameter F lash-Hook in the incident bag, and Flash-Account represents to send the POTS terminal iidentification of hooking signal.
Wherein, the PSTN Service Control Unit uses SUBSCRIBE message to POTS terminal use's " hooking signal " event subscription with when cancelling subscriptions, must point out events subscribed bag type in " Event " of SUBSCRIBE message header field, hooking signal event bag is subscribed in expression:
Event：signal-flashhook
When the POTS terminal use states business in the use, hooking, the sip user agent node receives POTS terminal use's hooking signal, judge the subscription example that has this user's " hooking signal ", then send NOTIFY to subscriber's (PSTN Service Control Unit), notify this user to send " hooking signal ", by " off hook signal " incident packet format of above-mentioned definition, " Event " header field in the NOTIFY:
Event：signal-flashhook
The incident bag that carries in the NOTIFY is as follows:
Flash-Hook：yes
The POTS terminal use number of Flash-Account:URI form
Dial the number behind the POTS terminal use hooking, also need report the PSTN Service Control Unit by the sip user agent node, also can carry by NOTIFY, concrete mode can be referring to the current draft draft-ietf-sipping-kpml-07.txt of IETF, the PSTN Service Control Unit receives the number of being dialled behind user's hooking, carry out number analysis and carry out correspondent service logic control, this process the present invention be not described in detail.
In addition, according to 3 embodiment in front as can be seen, off hook signal and hooking signal are very similar two kinds of analog subscriber signalings, it all is the analog subscriber signaling of the operation initiation of dialogue machine hook switch, therefore, their incident bag can be unified and is defined as a switch hook signal incident bag, and this incident bag is defined as follows:
signal-hook＝hook-status-line?CRLF
[flash-account?CRLF]
hook-status-line＝“Hook-Type”HCOLON?hook-status
hook-status＝″off-hook″/″flash-hook″/″no″
hook-account＝“Hook-Account”HCOLON?Account-URI
Account-URI＝SIP-URI/SIPS-URI/absoluteURI
Wherein, switch hook signal incident bag type is named as signal-hook, represent the hook switch class of operation and comprise two Parameter H ook-Type in the incident bag, the value of off-hook classification and hooking classification is respectively off-hook and flash-hook, and Hook-Account represents to send the POTS terminal iidentification of corresponding hook switch operation.
The PSTN Service Control Unit uses SUBSCRIBE message to POTS terminal use " hooking signal " and " off hook signal " event subscription with when cancelling subscriptions, must point out events subscribed bag type in " Event " of SUBSCRIBE message header field, switch hook signal incident bag is subscribed in expression:
Event：signal-hook
Receive POTS terminal use's hooking signal when the sip user agent node, judge the subscription example that has this user's " hooking signal ", then send NOTIFY to subscriber's (PSTN Service Control Unit), notify this user to send " hooking signal ", " Event " header field in the NOTIFY:
Event：signal-hook
The incident bag that carries in the NOTIFY is as follows:
Hook-Type：flash-hook
The POTS terminal use number of Hook-Account:URI form
Receive POTS terminal use's off hook signal when the sip user agent node, judge the subscription example that has this user's " off hook signal ", then send NOTIFY to subscriber's (PSTN Service Control Unit), notify this user to send " off hook signal ", " Event " header field in the NOTIFY:
Event：signal-hook
The incident bag that carries in the NOTIFY is as follows:
Hook-Type：off-hook
The POTS terminal use number of Hook-Account:URI form
Description by above 3 embodiment as can be seen, pass through the solution of the present invention, after conventional P OTS terminal accesses to and uses the packet-based core networks of SIP as call control signalling, still can use hot line, meet and busyly to deposit, Call Waiting, Three-Way Calling, conference telephone, calling transfer, search malicious call, calling back when busy etc., make the user on professional inheritance, obtain favorable experience according to off hook signal, the mutual PSTN simulation services of hooking signal.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1, a kind of public switched telephone network (PSTN) PSTN simulation services implementation method is characterized in that, may further comprise the steps:
The PSTN Service Control Unit sends the corresponding trigger event subscribe request of traffic performance that can be employed with the POTS terminal to Plain Old Telephone Service POTS terminal, described traffic performance is that the POTS terminal is given in advance, and described trigger event subscribe request uses the header field of sip message to indicate the incident bag type of ordered trigger event;
The sip user agent node receives described sip message and resolves through calling conversation control unit, creates the subscription example of described trigger event bag for the POTS terminal;
The PSTN Service Control Unit receives the sip message that the sip user agent node sends, and described sip message indicates this POTS terminal and sends triggering signal;
The sip user agent node receives the described triggering signal of the described trigger event bag description of POTS terminal transmission;
The PSTN Service Control Unit is resolved described sip message, triggers the business that the POTS terminal can be employed.
2, the method for claim 1 is characterized in that, described triggering signal is the off hook signal of analog subscriber signaling.
3, the method for claim 1 is characterized in that, described business is hot line service or meets the busy business of depositing.
4, method as claimed in claim 1 or 2 is characterized in that, the traffic performance of described POTS terminal is: the POTS terminal use successfully registers hot line service or meets the busy business of depositing.
5, method as claimed in claim 2 is characterized in that, described business is that POTS terminal use off-hook is listened special prompt sound service or verbal announcement business.
6, the method for claim 1, it is characterized in that, the traffic performance of described POTS terminal is: the POTS terminal use successfully activates MWI, or the POTS terminal use successfully registers unconditioned call connection, or the POTS terminal use successfully registers dialing restriction or interruption-free or absence or phone locking or the POTS terminal use enters the arrearage state or the POTS terminal use becomes Centrex user or little friendship user.
7, the method for claim 1 is characterized in that, described PSTN Service Control Unit triggers the business that the POTS terminal can be employed, and comprises the steps:
The PSTN Service Control Unit starts the subscriber dialing that timer monitors the POTS terminal;
If described timer expiry, the POTS terminal use is dialing not, and the PSTN Service Control Unit sends REFER message to the sip user agent node, indicates described sip user agent node to initiate a new SIP initial session request.
8, method as claimed in claim 4 is characterized in that, described PSTN Service Control Unit triggers the business that the POTS terminal can be employed, and comprising:
The PSTN Service Control Unit starts the subscriber dialing that timer monitors the POTS terminal;
If described timer expiry, the POTS terminal use is dialing not, the PSTN Service Control Unit sends REFER message to the sip user agent node, and indication sip user agent node is to described hot line or meet and busyly deposit the hot line number of successfully registration or meet the busy number of depositing and initiate a new SIP initial session request; Or PSTN Service Control Unit thermotropism wire size sign indicating number or the busy number transmission REFER message of depositing of chance, the indication latter initiates a new SIP initial session request to the POTS terminal use.
9, method as claimed in claim 6 is characterized in that, described PSTN Service Control Unit triggers the traffic performance that the POTS terminal can be employed, and also comprises:
The PSTN Service Control Unit sends REFER message to the sip user agent node, and indication sip user agent node is initiated a new SIP initial session request to the media resource of special prompt tone or voice suggestion; Or the PSTN Service Control Unit indicates the media resource of special prompt tone or voice suggestion to initiate a new SIP initial session request to the POTS terminal use to the media resource transmission REFER of special prompt tone or voice suggestion message.
10, the method for claim 1 is characterized in that, described triggering signal is the hooking signal of analog subscriber signaling.
As claim 1 or 10 described methods, it is characterized in that 11, described business is Call Waiting or Three-Way Calling or conference telephone or hooking calling transfer or searches malicious call or calling back when busy or the busy hooking business of depositing of chance.
As claim 1 or 10 described methods, it is characterized in that 12, the traffic performance that described POTS terminal can be employed is: the POTS terminal use successfully opens the hooking service authority or successfully registers the hooking business or the POTS terminal use is online.
13, the method for claim 1 is characterized in that, described trigger event bag is described one or more triggering signals.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510085217.8A CN100550936C (en) | 2005-07-21 | 2005-07-21 | A kind of public telephone exchange network simulation service implementation method |
| PCT/CN2006/001772 WO2007009384A1 (en) | 2005-07-21 | 2006-07-20 | A method for realizing pstn emulation service |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510085217.8A CN100550936C (en) | 2005-07-21 | 2005-07-21 | A kind of public telephone exchange network simulation service implementation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1901571A CN1901571A (en) | 2007-01-24 |
| CN100550936C true CN100550936C (en) | 2009-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510085217.8A Expired - Fee Related CN100550936C (en) | 2005-07-21 | 2005-07-21 | A kind of public telephone exchange network simulation service implementation method |
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| CN (1) | CN100550936C (en) |
| WO (1) | WO2007009384A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079937B (en) * | 2007-07-03 | 2010-04-14 | 中兴通讯股份有限公司 | A method and system for realizing hotline service of SIP terminal |
| CN102131005B (en) * | 2010-12-10 | 2014-12-24 | 华为技术有限公司 | Method, device and system for implementing hotline service in internet protocol (IP) network |
| CN102629962A (en) * | 2012-03-13 | 2012-08-08 | 上海大亚科技有限公司 | Method for realizing voice message function based on message wait event in EPON system |
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| CN100338924C (en) * | 2002-11-23 | 2007-09-19 | 中兴通讯股份有限公司 | Method of interconnected business providing between control equipment and business equipment in IP network |
| US7450566B2 (en) * | 2003-06-05 | 2008-11-11 | Oracle International Corporation | Apparatus and method for providing a unified telephony solution |
| CN100531194C (en) * | 2004-09-07 | 2009-08-19 | 华为技术有限公司 | Service signal processing system and method for group domain |
-
2005
- 2005-07-21 CN CN200510085217.8A patent/CN100550936C/en not_active Expired - Fee Related
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| WO2007009384A1 (en) | 2007-01-25 |
| CN1901571A (en) | 2007-01-24 |
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