CN106921810A - Roaming call is forwarded to VoIP system - Google Patents

Abstract

Each embodiment of the invention generally relates to forward roaming call to VoIP system.In particular it relates to a kind of system and method for forwarding call request initially related to plain old telephone to avoid calling from roaming to VoIP system.The local access code chain that the plain old telephone of callee is configured to Session initiation Protocol (SIP) platform by telephone number Yu VoIP system fetches the calling forwarding realized to VoIP system.Any call request related to telephone number is automatically forwarded to SIP platform by local access code, and is transformed into voip call request.If voip user's account of callee is online, SIP platform initiates VoIP communication sessions.Therefore, even if when plain old telephone is located in random zone, VoIP system adapter call request to callee with so that do not force wandering fee.

Description

Roaming call is forwarded to VoIP system

Technical field

Present disclosure relates generally to network communication field, and relates more specifically to internet Protocol voice (VoIP) communications field.

Background technology

Internet protocol communication (VoIP) be it is a kind of using digital signal transmission in real time simultaneously And at least partially through the technology of internet transmissions voice communication.VoIP is by remote friendship Changing carrier wave and causing to be called by the audio or video of Internet Protocol (IP) is turned into exclusively with biography The cost-effective alternative of the voice transfer of system PSTN (PSTN).Due to The number attribute of transmission, VoIP provides increased signal transacting, encryption and call setup and behaviour Make ability.

Generally, RTP (RTP), RTP Control Protocol (RTCP) and meeting are used Words initiation protocol (SIP) transmission VoIP message.Therefore, VoIP system is serviced including RTP Device and sip server.RTP defines standardized packet format and carries Media Stream (for example Voice data and video data), and RTCP is used to monitor transmission statistic and service quality (QoS) And help the synchronization of multiple streams.SIP help set up and terminates pass through real-time performance each be The connection of system part.

In existing VoIP system, each user (such as fixes with independently of telephone number Telephone number or Mobile Directory Number) user account be associated.Generally, ID can be with It is any character string selected by user.Both caller user and callee user must be same When with its VoIP Account Logon initiating voip call.Setback during using VoIP it is main Reason is that user account (particularly callee) is generally remained and published or offline, therefore calling Person can not relate to callee, such as when VoIP application programs are in the IP phone of callee On when being closed, the IP phone of callee be closed or can not access WiFi or any its His network service etc..Comparatively speaking, the landline telephone or cell phone of user generally remain standby Or it is normally opened.

The content of the invention

Therefore, will be advantageous that, there is provided a kind of VoIP system, the VoIP system can increase The chance of one voip user and another voip user's voice communication and right so as to improve The Consumer's Experience of VoIP system.

The embodiment of present disclosure provides a kind of VoIP system, and the VoIP system is configured to Based on voip call request come access phone number, and if callee is offline, then to The telephone plant forwarded call request being associated with telephone number.Telephone plant is by VoIP system Outside telephone network (phone in such as landline telephone, mobile phone, private telephone network, Or phone (referred to herein, generally, as " the common electricity in another VoIP system of callee Words ")) control.When voip call request is received, the session setup association of VoIP system View (SIP) server search callee's account has logged on to its any endpoint device.Such as Fruit determines that callee's account is offline, then sip server is to the phone being associated with telephone number Network automatically delivers call request.In this way, it can be advantageous to contacted by plain old telephone Callee, although his/her VoIP account is offline.In certain embodiments, VoIP system Using plain old telephone telephone number as user VoIP accounts ID.Therefore, turn in calling During hair, sip server can be joined using the VoIP accounts ID of callee automatically and directly It is the plain old telephone of callee.To the process that external telephone network forwarding voip call is asked It is transparent for caller's endpoint device, and for caller is therefore transparent.Therefore, Caller only needs to dial callee once and is provided through voip call or phone is exhaled It is the possibility of contact callee.Further, since according to the VoIP system of present disclosure Communicated than telephone network accord priority to using VoIP, it advantageously reduces logical for voice The average unit cost of the user of letter.

The embodiment of present disclosure is also provided and processes related to plain old telephone using VoIP system Call request mechanism, especially when plain old telephone at home network coverage outside and When wandering fee being produced.The plain old telephone of callee is configured to call request certainly Dynamic to be transformed into voip call request, voip call request is forwarded automatically along and gives local Number for access The SIP platform of code-phase association.Access code be selected so that plain old telephone and SIP platform it Between communication exempt from roaming charges.If the VoIP accounts ID of callee is arranged to and common electricity Words number is identical, then SIP platform can be based on the number dialed directly to the VoIP of callee Account sends call request.This mechanism can be saved advantageously in callee relative to common The domestic network of phone is in the callee's wandering fee that can be imposed during foreign country.From common electricity Words calling is switched to voip call for the equipment of caller and therefore for caller is Bright.

If the VoIP accounts and plain old telephone of user are all arranged to forwarded call to each other, Then calling endless loop can occur in the case where the VoIP accounts of callee are offline.In order to This problem is solved, the sip server of the embodiment according to present disclosure determines call request From external telephone network (such as sharing switched telephone network (PSTN)) transmission or in VoIP Transmitted (such as by internet) in system.If calling comes from PSTN and callee VoIP accounts it is offline, then sip server by call-sign be from VoIP system and from It is dynamic to terminate call session and forward it again to PSTN systems.

In one embodiment of present disclosure, a kind of computer of promotion real-time calls session The method of realization, including：(1) session in internet protocol voice (VoIP) system At initiation protocol (SIP) platform, receive be derived from by the telephone network outside the VoIP system The call request of the forwarding of the call request of the telephone number correlation of network control, wherein described The call request of forwarding is related to the access code of the SIP platform, and wherein further, The call request is submitted from caller's equipment；(2) calling based on the forwarding please Ask to identify the voip user's account being associated with the telephone number；(3) detect described Endpoint device in the listed VoIP system of voip user's account；And (4) exist The calling of the VoIP system is initiated through between caller's equipment and the endpoint device Session.

Above is summarizing and therefore as needed comprising the simplification to details, summary and omission； Therefore, it will be appreciated by those skilled in the art that the general introduction is merely illustrative and is not intended to appoint Where formula is limited.Such as the other aspects of the present invention, the invention spy that are only defined by the claims Be will become apparent in the nonrestrictive detailed description that advantage of seeking peace is provided below.

Brief description of the drawings

Be read in conjunction with the figure it is described in detail below be better understood with embodiments of the invention, attached In figure, similar reference represents similar element, and in the accompanying drawings：

Fig. 1 is that the management for describing a kind of embodiment according to present disclosure is included to external call The process that the illustrative computer of the voip call of the calling forwarding of the phone in network is realized Flow chart；

Fig. 2 illustrates a kind of being asked in treatment voip call for the embodiment according to present disclosure With the exemplary communication flow during calling forwarding；

Fig. 3 is that being forwarded to VoIP system for a kind of embodiment described according to present disclosure is overflow The flow chart of the method that trip calling is realized for the illustrative computer for the treatment of；

Fig. 4 illustrate according to a kind of embodiment of present disclosure be configured to use VoIP systems System promotes the exemplary communication network of international call initially related to plain old telephone；

Fig. 5 is described according to a kind of embodiment of present disclosure in VoIP system and PSTN Between calling forwarding without cause calling endless loop example process flow chart；

Fig. 6 illustrates a kind of VoIP accounts in callee of the embodiment according to present disclosure When family and plain old telephone are all arranged to calling forwarding, during treatment voip call is asked Exemplary communication flow；

Fig. 7 is diagram being configured to external call according to a kind of embodiment of present disclosure The configuration of the exemplary sip server equipment in the VoIP system of forwarded call request Block diagram；And

Fig. 8 is illustrated according to a kind of embodiment of present disclosure including can be to outside telephone network The network system of the VoIP system of network forwarded call.

Specific embodiment

Now with detailed reference to the preferred embodiments of the present invention, its example is illustrated in the accompanying drawings.Though So combine preferred embodiment and describe the present invention, it being understood, however, that it is not intended to the present invention It is limited to these embodiments.On the contrary, it is intended to cover can be included in by appended right It is required that alternative, modification and equivalent in the spirit and scope of the present invention for limiting.In addition, In described in detail below to embodiments of the invention, a large amount of details are given to improve Thorough understanding of the present invention.However, it will be understood by those of ordinary skill in the art that can be Without the practice present invention in the case of these details.In other cases, do not retouch in detail Well-known method, process, part and circuit are stated in order to avoid obscuring various embodiments of the present invention Each side.Although a kind of method can be depicted as a series of step of numberings for clarity Suddenly, however numbering is not necessarily indicative to the order of each step.It should be appreciated that some of them step can Be skipped, be executed in parallel or do not require keep exact sequence in the case of be performed. The accompanying drawing for showing the embodiment of the present invention is half exemplifying and be not drawn to, especially, its In some sizes be in order to clearly present and in the accompanying drawings be exaggerated show.Similarly, though View in right accompanying drawing generally shows similar orientation for convenience of description, but in accompanying drawing This description is arbitrary for most of parts.Generally, this can be operated with orientation in office Invention.

Symbol and term

However, should engrave on one's mind, all these and similar terms are related to appropriate physical quantity Join and only apply to the convenient mark of this tittle.Unless specifically indicated otherwise, otherwise root According to following discussion it is clear that, it will be appreciated that through the present invention, using such as " processing " Or " access " or " execution " or the discussion of the term such as " storage " or " rendering " refer to by quilt It is expressed as in the RS of computer system and other computer-readable mediums The data manipulation of physics (electronics) amount and it is transformed into and is similarly represented as computer system memory Or the physical quantity in register or other such information Store, transmission or display devices other The action of the computer system of data or similar electronic computing device and process.When part occurs When in several embodiments, part using expression of same reference numerals is and initial embodiment In illustrated identical part.

Roaming call is forwarded to VoIP system

In a word, the embodiment of present disclosure uses following computer implemented process：Exhaled In the case that the VoIP accounts of the person of crying are offline, using the telephone number of callee to another electricity The request called for ip voice (VoIP) of telephone network forwarded call person.In VoIP system Determine forwarded call request after callee's VoIP account present offlines.In this way, still So voice communication can be set up by telephone network, although callee is for voip call not Can use.The telephone number of callee can be expressly included in voip user ID, or Storage is associated in VoIP data storehouse and with ID.Repeating process is for caller Transparent.

The embodiment of present disclosure also provides the calling from plain old telephone network to VoIP system Repeating process.Related to plain old telephone international call request be switched to local SIP platform with Set up voip call session.May force so as to callee can save plain old telephone network Expensive wandering fee.If the VoIP accounts and plain old telephone of user are all arranged to Forwarded to mutual calling and once VoIP accounts are confirmed as offline, then sip server By the incoming call from PSTN labeled as be derived from VoIP system and terminate automatically call session with Prevent from calling endless loop.

Fig. 1 is description showing according to a kind of management voip call of embodiment of present disclosure The flow chart of the example computer implemented process 100 of property.Process 100 can be in further detail below It is implemented in Session initiation Protocol (SIP) service of the VoIP system of description.101, lead to Cross caller interacted with the endpoint device in VoIP system to sip server submit to calling please Ask.Such as, caller is used by the figure of the VoIP application programs in smart phone The VoIP accounts ID (or " VoIP herein of family interface (GUI) input callee ID”).102, call request is processed at sip server.Based on call request, visit Ask the VoIP accounts informations of the callee of the telephone number including callee.According to this public affairs Open content, voip user's account is with to belong to telephone network outside VoIP system (such as wireless Telephone network or public switched telephone network (PSTN)) telephone number be associated.

103, the account of sip server search callee has been logged in or " online " thereon VoIP endpoint devices.If sip server detects such endpoint device, 104, Sip server initiates VoIP communication sessions between caller and the endpoint device of callee.

The endpoint device of caller and callee is VoIP booking reader's equipment.Can be as The equipment of endpoint device operation includes personal computer, desktop computer, smart phone, individual Digital assistants (PDA), handheld computer, programmable consumer electronics, it is configured with mould Intend standard telephone, IP phone or other mobile devices of telephone adapter (ATA) etc.. It should be appreciated that booking reader's equipment can be provided with VoIP application programs (such as in intelligent electricity In words) or it may be coupled to be configured to be converted into call the adaptation of voip call Device (such as VoIP routers or voip gateway).

On the other hand, if sip server determines that the VoIP accounts of callee are worked as 103 Before publish or " offline ", then sip server is asked to the automatic forwarded call of external telephone network. More specifically, sip server is in 105 phone numbers that callee is sent to external telephone network Call session on code and the phone of request call person.Used as response, telephone network treatment turns The request and the foundation between the endpoint device of caller and the plain old telephone of callee of hair Dial-up connection.

In certain embodiments, calling forwarding option is selected in advance by callee, for example, exist In VoIP Account Registrations or in the setting configuration process of the GUI applied by VoIP. In some embodiments, telephone number is identical with the VoIP ID of callee or is clearly wrapped It is contained in the VoIP ID of callee.In this case, caller can call submitting to The telephone number of callee is directly inputted during request and this number is direct by sip server Use with contact external telephone network.In this configuration, caller only needs to make a contact Number is associated with callee, rather than individually VoIP ID and telephone number.At some its In his embodiment, telephone number storage conduct in the database of VoIP system of callee A part for user profiles.Sip server once receives callee's in call request ID is just from database access telephone number.

Present disclosure is not limited to can be from any of the call request of VoIP system reception forwarding The telephone network of particular type.The phone being associated with such telephone network herein can be with Referred to as " plain old telephone (regular phone) ".External telephone network can be PSTN, specially With interchanger (PBX) network, mobile telephone network or another VoIP system etc..So Mobile telephone network can be global system for mobile communications (GSMC) network, CDMA (CDMA) network etc..

Therefore, according to present disclosure, call request, VoIP system are submitted in response to caller First search callee VoIP accounts wherein listed endpoint device and so as to really It is fixed whether to set up voip call session.If the account present offline of callee, VoIP system sends callee's telephone number and enables to set up caller to telephone network Communication session between equipment and the phone of callee.Therefore, VoIP system is advantageously true Voip call session is protected preferentially to be exhaled to reduce user than the call session by telephone network The average unit cost cried.In addition, according to present disclosure, when callee VoIP accounts from During line, VoIP system automatically switches to alternative communication system.This advantageously increases caller and connects The possibility of logical callee.Further, since repeating process for caller endpoint device with And caller is transparent, so caller does not discover and cannot connect voip call and only discover With being successfully connected for caller.Therefore, VoIP system provides more preferable Consumer's Experience.

Fig. 2 illustrates a kind of being asked in treatment voip call for the embodiment according to present disclosure The exemplary communication flow of period.As illustrated in simplified form, VoIP system 200 is wrapped Include the He of corresponding endpoint device 220 of sip server 210 and caller and callee 230。

In response to interacting for caller and user interface in endpoint device 220, set from end points Call requests are generated for 220 and the call request is sent to the SIP service of VoIP system Device 210 (as arrow " 1 " is marked).For example, call request includes caller and is exhaled The ID of the person of crying, sip server can be obtained to being exhaled that external telephone network is registered from it The telephone number of the person of crying.

When call request is received, the account of the searching calls person of sip server 210 has been logged in Endpoint device (as arrow " 2 " is marked).It is assumed that the endpoint device 230 of callee Online and callee receives calling, then equipment 230 is fed back to sip server 210 and is indicated The signal (as arrow " 3 " is marked) of its availability.As response, sip server 210 inform that the callee of endpoint device 220 of caller has received calling (such as arrow " 4 " Marked).Sip server then set up between equipment 220 and 230 calling connection and Voice data transmission.

On the other hand, set in the listed end points of VoIP accounts for not detecting callee In standby scene, sip server calls the telephone number of callee by external telephone network, The telephone number is related to the plain old telephone 240 of callee (as arrow " 5 " is marked). For example, plain old telephone 240 is the landline telephone that is controlled by PSTN systems or by GSM systems The cell phone of system control.If callee's response call request on plain old telephone 240, Then it sends feedback signal to sip server 210 (as arrow " 6 " is marked).Cause This, between the VoIP endpoint devices 220 of caller and the plain old telephone 240 of callee Set up call session.

Generally, when user's geographical coverage area outside travelling of telephone network at home, user Very expensive wandering fee must be paid and (especially received with being called using mobile phone Calling), such as international roaming expense.According to the another aspect of present disclosure, mobile phone Equipment may be configured to cause any network outcall request (such as international call) to be forwarded To the local number of the access code corresponding to SIP platform.As response, SIP platform conduct Voip call asks to process call request, is exhaled so as to common telephone call is transformed into VoIP Cry without producing wandering fee.Fig. 3 is to describe a kind of embodiment according to present disclosure International nomadism call is forwarded for the side of the illustrative computer realization for the treatment of to VoIP system The flow chart of method 300.

301, by by its telephone number and local SIP platform access code chain fetch by with (being in this example " the callee ") phone (such as mobile phone) at family is configured to exhale Cry forwarding.Domestic network can have been advanced in response to user input or phone is detected Call forwarding feature is enabled when outside automatically.Such as, when travelling in overseas, user is by peace Dress telephone program selection call forwarding feature in the phone.Local SIP platform access code can To be automatically selected or user is specific so that the communication between phone and SIP platform is exempted from Roaming charges.

Once it is configured, then to the sip server being associated with local SIP platform access code Automatic forwarding is related to telephone number (such as by phone domestic network) or is dialled from phone Any call request beaten.This repeating process can be for the equipment of caller and caller Transparent.Therefore, 302, the telephone number of callee is dialed in response to caller, The call request related to telephone number is received at telephone network and at phone.Call request Can be by caller from any kind of phone (such as voip phone or common of caller Phone) submit to.303, by call request auto-changing into for calling called The voip call request of the VoIP accounts of person.304, to local SIP platform Number for access The local sip server of code-phase association sends voip call request.The phone of callee with By the communication of its domestic network it is local between VoIP platforms, and therefore exempts from roaming charges. Therefore, the listed endpoint device of the account of sip server searching calls person.

If at 305 sip server detect callee account it is online, SIP clothes Business device is initiated VoIP and is communicated meeting at 306 between endpoint device of the caller with callee Words.The endpoint device of callee can be the general of the callee that is associated with telephone number Identical of taking on the telephone equipment, or individually computing device.Therefore, callee can have International call is carried out sharply without producing any wandering fee.If callee's quilt at 305 It is defined as offline, then sip server can send 307 and indicate the disabled message of caller And terminate calling.As an alternative, if callee is as with reference to described by Fig. 1-Fig. 2 Call forward feature in configuration VoIP accounts, then can return on phone voip call Regular call, this forces wandering fee.For related to the normal phone numbers of callee Each call request repeat 302-307 in above procedure.

Fig. 4 illustrate according to a kind of embodiment of present disclosure be configured to use VoIP systems System promotes the example communication system and net of international call initially related to normal phone numbers Network 400.The phone 402 of endpoint device 401, callee of the system including caller, The VoIP accounts of VoIP platforms 403 (such as sip server) and callee have been logged in VoIP endpoint devices 405.VoIP platforms 403 and endpoint device 405 are coupled to internet 404.For example, the phone 402 of callee is that to have registered to PSTN and be provided with VoIP The mobile phone of the telephone number of client application.

In the present embodiment, the phone 402 of callee is arranged to VoIP platforms 403 Calling forwarding.More specifically, the telephone number of phone 402 is flat with VoIP platforms 403 Platform access code is linked.Such as, geographical covering of the callee in the domestic network of phone 402 Region exterior, such as travel outside USA.It is assumed that domestic network can exist in callee Force wandering fee for any calling carried out on phone 402 during USA outsides.In calling During forwarding configuration, select local platform access code to ensure phone 402 and VoIP platforms Roaming charges are exempted from communication between 403.The VoIP ID of callee and the phone number of phone 402 Code-phase is same.

When being received at the phone 402 of callee from exhaling that the equipment 401 of caller is submitted to It is flat to VoIP based on local VoIP platforms number when being request (such as shown in arrow " 1 ") The automatic forwarded call of platform 403 request (such as shown in arrow " 2 ").Therefore, will be with phone 402 The related call request of telephone number be transformed into the telephone number including callee VoIP is asked.Call request can be submitted to by the VoIP accounts of caller.

Based on telephone number, the VoIP ID of VoIP platform direct access callees, because its It is identical with telephone number in certain embodiments.VoIP platforms search for the VoIP ID of callee Listed endpoint device.For example, if the account of callee has been logged at endpoint device, Voip call then can be set up between the equipment 405 of caller's equipment 401 and callee Session.

In some embodiments of present disclosure, the VoIP accounts and plain old telephone of user are all Mutual calling forwarding can be arranged to, such as described by Fig. 1 and Fig. 3. The configuration can provide more preferable Consumer's Experience, and connect callee by effectively increasing Probability and reduce the roaming charges of user and be used for reducing the cost of user.However, this configuration exists VoIP accounts are probably problematic in being confirmed as offline scene, wherein from SIP service Device is asked to external telephone network forwarded call.It is therefore proposed that being forwarded automatically to sip server The telephone network of call request is returned, it makes sip server be forwarded back to calling again to telephone network Request etc., to cause so-called calling endless loop.

Fig. 5 is the VoIP system and PSTN for describing a kind of embodiment according to present disclosure Between the flow chart that forwards without causing the example process 500 of endless loop of bi-directional call. 501, the VoIP accounts of callee are configured to realize from VoIP accounts to being coupled to The call forwarding feature of the plain old telephone of the callee of PSTN, it is such as more detailed with reference to Fig. 1-Fig. 2 Carefully describe.VoIP ID can be identical with the telephone number of plain old telephone.502, will The plain old telephone of callee is configured to for example be accessed by the way that telephone number is linked into SIP platform Number come realize from plain old telephone to VoIP accounts calling forwarding function, such as with reference to Fig. 3- What Fig. 4 was more fully described.503, the VoIP endpoint devices from caller are received Voip call is asked.If the VoIP accounts of callee are online, VoIP is set up 505 Call session.

If it is determined that the VoIP accounts of callee are offline, then 506, based in 501 execution Configuration by plain old telephone forwarded call from PSTN to callee ask.Because common electricity Words are also arranged to calling forwarding, so PSTN is forwarded back to calling to VoIP system automatically Request.Therefore, 507, the SIP being associated with the SIP platform access code of defined puts down Platform receives call request from PSTN.As illustrated in dotted arrow line, process 504,506 May undesirably be repeated with 507 and be changed into circulating or calling endless loop.

In order to solve the problems, such as to call endless loop, SIP platform is distinguished and marks the shape of call request State is from external telephone network (such as PSTN) or from internet.If SIP puts down Platform determines call request from PSTN, then SIP platform 508 by by status identifier with VoIP account numbers in telephone number or call log are attached the state mark of call request It is designated as being asked from VoIP.Therefore, SIP platform terminates to call and inform calling 509 Person callee is unavailable.If SIP platform determines call request from internet, SIP Platform proceeds to process calling.It should be appreciated that present disclosure is not by determination call request It is route from PSTN or from the mechanism and process of VoIP system (such as internet) route Limitation.

In some other embodiments, when when 503 receive call request, SIP platform is true Fixed calling route from external telephone network (such as PSTN) or is route from internet.If It comes from PSTN, then SIP platform is marked so using telephone number or VoIP account numbers State, such as status identifier is associated with the telephone number in call log.Can tie up Mark is held until call session terminates.SIP platform is it is then determined that the VoIP accounts of callee It is whether online.If online, calling is initiated as described by block 504 and 505 Session.If however, offline, SIP platform terminates call session based on status identifier, Rather than asked to PSTN forwarded calls, as described by block 504 and 509.

Fig. 6 illustrates a kind of VoIP accounts in callee of the embodiment according to present disclosure Family and plain old telephone be all configured user calling forwarding when treatment voip call ask during Exemplary communication flow.As illustrated in simplified form, VoIP system 600 includes SIP Server 610 (or platform) and the corresponding endpoint device 620 of caller and callee With 630.

From VoIP endpoint devices 620, caller submits calling quilt to sip server 610 first The call request (such as shown in arrow " 1 ") of caller.As response, sip server 610 Attempt the listed endpoint device of account of detection callee.In this example, SIP service Device 610 determines the VoIP accounts present offline (such as shown in arrow " 2 ") of callee.

Configuration, the contact called of sip server 610 are forwarded based on the calling for VoIP accounts The plain old telephone 640 of person, to attempt the common electricity of equipment 620 and callee in caller Call session is set up between words 640 (such as shown in arrow " 3 ").Then, based on for general The calling forwarding configuration taken on the telephone, plain old telephone 640 is forwarded back to calling to sip server 610, To attempt for calling to be transformed into voip conversation.

According to present disclosure, sip server is marked and SIP access codes with status identifier The related and all-calls from PSTN.For example, making prefix " * " or any other conjunction Suitable annotation is associated with the normal phone numbers (such as shown in arrow " 5 ") in call log. Therefore, if sip server detects offline (such as arrow " 6 " of VoIP accounts of callee It is shown), and telephone number is associated with status identifier, then and sip server abandons calling Rather than to the forwarded call of plain old telephone 640 (such as shown in arrow " 7 ").

Fig. 7 is diagram being configured to external call according to a kind of embodiment of present disclosure Exemplary sip server equipment 700 in the VoIP system of forwarded call request is matched somebody with somebody The block diagram put.Sip server equipment 700 include primary processor 701, system storage 702, GPU (GPU) 703, I/O interfaces 704 and lattice network 705, operating system 706 and application software 710.Application software 710 includes SIP of the storage in memory 702 Server program 720.When being performed by primary processor 701, sip server program 720 can So that voip call session is initiated in response to user's request in the case where callee is online. And if callee is offline, then sip server program 720 can be to related to callee The automatic forwarded call request of plain old telephone of the callee of connection, the wherein common electricity of callee Words are controlled by the telephone network outside VoIP system.

More specifically, sip server program 720 include network topology/routing database 721, RTP selecting modules 722, session teardown module 723, session establishment module 724 and end points set Standby detection module 725.Network topology/routing database 721 is stored and taken with for providing VoIP The arrangement of the various parts of the network of the business information related to logical construction to state and physics. Address according to multiple subscriber endpoints equipment and based on the information included in database 721, RTP selecting modules 722 identify the suitable RTP servers for being respectively used to endpoint device.Choosing Selecting can measure to realize what each specific endpoint device and its were distributed based on one group of QoS Enhanced transmission performance between RTP servers.One group measure can with delay, availability, Shake and bandwidth etc. are relevant.Session establishment module 724 is used for the selected RTP services of signaling Device is setting up Port Mirroring and initiate voip call session.Session teardown module 723 is used for Signaling RTP servers once terminating once call terminating Port Mirroring relation.End points sets Standby detection module 725 identifies the online endpoint device for participating in calling based on call request.

Sip server 700 also includes that account database 726 and external telephone network communicate Module 727.Except the user profile used in traditional VoIP system, user account number The telephone number of user can also be stored under user profiles according to storehouse 726.If callee is Through enabled call forwarding capability and when endpoint device detection module 725 determines that callee is offline When, external telephone network communication module 727 is using telephone number to the quilt controlled by telephone network The plain old telephone of caller sends call request.

Sip server 700 can also be configured to identify the calling from external telephone network forwarding Whether request is derived from this VoIP system and therefore records such state of call request.Such as Fruit call request route from external telephone network, then be considered as call request by sip server 700 The call request for being forwarded that should be forwarded back to external telephone network.Sip server 700 can With the such state for generating status identifier to mark call request.Therefore, if SIP takes The VoIP accounts that business device detects callee are offline, then it is based on mark and abandons calling to keep away Exempt to call endless loop.

Sip server program 720 can be performed as other discussed on Fig. 1-Fig. 6 are various Function and process.It should be appreciated that sip server 700 can include it is well-known in the art A large amount of other modules and function.Technology for realizing the module of these programmings is this area crowd institute Known.In addition, the VoIP system according to present disclosure can include being matched somebody with somebody respectively It is set to one of SIP Register servers, sip proxy server or SIP Redirect Servers Or multiple sip server equipment.Call forwarding feature according to present disclosure can be at these Quilt in any one or more servers in sip server or any other suitable server Realize.Such as those of ordinary skill in the art it should be appreciated that sip server program 720 can be with Realized with any one or more suitable programming languages well known by persons skilled in the art, it is all Such as C, C++, Java, Python, Perl, C#, SQL.

Fig. 8 is illustrated according to a kind of embodiment of present disclosure including can be to outside telephone network The network system 800 of the VoIP system 810 of network forwarded call.VoIP system 800 includes SIP Server 811, RTP servers 812 and 813 and endpoint device 814 and 815, these It is all coupled to each other by communication network (such as internet).It should be appreciated that according to the disclosure The VoIP system of content also includes various other parts well-known in the art.For example, should Work as understanding, VoIP endpoint devices (such as 814 or 815) can be via in the middle of one or more Equipment (such as voip gateway, support the router of VoIP, the network switch, hub, Private Automatic Exchange (PABX), fire wall, and/or network address translation devices etc.) coupling Close to internet and RTP servers.In addition, VoIP data transmission can be using by transmission The RTP and SIP of control protocol (TCP).

According to the embodiment of present disclosure, the user of VoIP system 810 notes to VoIP system The telephone number of volume external telephone network.External telephone network can be PSTN 820, GSM System 830 or PBX 840 etc..Therefore, telephone number can with landline telephone 821 or 822, Mobile phone 831 or 832 or the grade of extension telephone 841 or 842 are associated.In response to exhaling Request is cried, if sip server 811 can not position the VoIP accounts of wherein callee The endpoint device of login, then sip server 811 be changed into by external network (such as 820, 830 or 840) calling telephone number.According further to the embodiment of present disclosure, VoIP systems System 810 can also take over and process the call from external telephone network forwarding, such as with reference to figure 3- Fig. 6 is more fully described.

Present disclosure is not limited by the type or scale of the network for transmitting VoIP data. VoIP system can be deployed in public network (or internet) or be designed to provide VoIP The dedicated network of service, cable network, wireless network, the network (SDN) of software definition, In virtual network, physical network or its combination.Therefore, endpoint device can be public with corresponding IP address or private network address etc. are associated.

RTP servers 812 and 813 can route to single RTP servers in a mirror-image fashion VoIP data.It is chosen so as to participate in voip call session in RTP servers (such as 812) When, it can perform route optimization process to determine for being serviced with selected another RTP Device (such as 813) exchanges the network route of VoIP data.

Although having been disclosed for some preferred embodiments and method herein, but people in the art Member according with disclosure above content it should be clear that can be without departing from the spirit and scope of the present invention In the case of such embodiments and methods are changed and modified.Being intended to the present invention should only limit In scope and the clause of applicable law and principle required by appended claims.

Claims (20)

1. a kind of computer implemented method for promoting real-time calls session, methods described includes：

Session initiation Protocol (SIP) platform in internet protocol voice (VoIP) system Place, receives the phone number code-phase for being derived from and being controlled by the telephone network outside the VoIP system The call request of the forwarding of the call request of pass, wherein the call request of the forwarding and institute The access code for stating SIP platform is related, and wherein further, the call request It is submitted from caller's equipment；

The VoIP being associated with the telephone number is identified based on the call request of the forwarding User account；

Detect the endpoint device in the listed VoIP system of voip user's account； And

The VoIP system is initiated through between caller's equipment and the endpoint device Call session.

2. computer implemented method according to claim 1, wherein the VoIP is used The mark of family account is identical with the telephone number.

3. computer implemented method according to claim 1, wherein the telephone network It is PSTN (PSTN).

4. computer implemented method according to claim 1, wherein the endpoint device Positioned at the international roaming region of the telephone network during the call session.

5. computer implemented method according to claim 3, wherein the access code It is the toll free number in state's inner region of the telephone network.

6. computer implemented method according to claim 1, wherein the caller sets Standby is plain old telephone equipment.

7. computer implemented method according to claim 1, wherein the caller sets Standby is another endpoint device in the VoIP system.

8. computer implemented method according to claim 1, wherein the endpoint device It is the mobile telephone equipment for being assigned the telephone number, and wherein described endpoint device is installed There are VoIP application programs.

9. a kind of system, including：

Telecommunication circuit；

Processor；And

Memory, is coupled to the processor and including instruction, and the instruction is by described Reason device causes that the system performs according to Session initiation Protocol (SIP) to promote to pass through when performing The method of the voice communication of internet protocol voice (VoIP) system, methods described includes：

Receive the phone number for being derived from and being controlled by the telephone network outside the VoIP system The call request of the forwarding of the call request that code-phase is closed, wherein the calling of the forwarding Request is related to the access code of the SIP platform, and wherein further, it is described Call request is submitted from caller's equipment；

Identify what is be associated with the telephone number based on the call request of the forwarding Voip user's account；

Detect that the end points in the listed VoIP system of voip user's account sets It is standby；And

The VoIP is initiated through between caller's equipment and the endpoint device The call session of system.

10. system according to claim 9, wherein the mark of voip user's account Know identical with the telephone number.

11. systems according to claim 9, wherein the telephone network is radio telephone Network.

12. systems according to claim 9, wherein the endpoint device is in the calling Ession for telecommunication is located at the random zone of the telephone network.

13. systems according to claim 9, wherein the access code is in the electricity Toll free number in state's inner region of telephone network.

14. systems according to claim 9, wherein caller's equipment is described Another endpoint device in VoIP system.

15. systems according to claim 9, wherein the endpoint device is to distribute The mobile telephone equipment of telephone number is stated, and wherein described endpoint device is provided with VoIP and answers Use program.

A kind of 16. Session initiation Protocols (SIP) of internet protocol voice (VoIP) network Server, including：

Telecommunication circuit, is communicably coupled to external telephone network；

Processor；And

Memory, is coupled to the processor and including instruction, and the instruction is by described Reason device causes that the sip server performs method when performing, and methods described includes：

Receive from the beginning of related to the telephone number controlled by the external telephone network The call request of the forwarding of beginning call request, wherein the call request of the forwarding with it is described The access code of SIP platform is related, wherein the call request is submitted from caller Equipment, and during wherein described access code is state's inner region of the external telephone network Toll free number；

Identify what is be associated with the telephone number based on the call request of the forwarding Voip user's account, wherein the mark of voip user's account and the telephone number It is identical；

Detect that the end points in the listed voip network of voip user's account sets It is standby；And

The VoIP is initiated through between caller's equipment and the endpoint device The call session of network.

17. sip servers according to claim 16, wherein the external telephone network It is wireless telephony network.

18. sip servers according to claim 16, wherein the endpoint device is in institute Positioned at the random zone of the external telephone network during stating call session.

19. sip servers according to claim 16, wherein caller's equipment is Another endpoint device in the voip network.

20. sip servers according to claim 16, wherein the endpoint device is point Mobile telephone equipment equipped with the telephone number, and wherein described endpoint device is provided with VoIP application programs.