CN101312452A

CN101312452A - Method for answering call mode message and subscriber proxy

Info

Publication number: CN101312452A
Application number: CNA2007100745847A
Authority: CN
Inventors: 孙谦; 田林一; 任大奇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-05-26
Filing date: 2007-05-26
Publication date: 2008-11-26

Abstract

The invention discloses a method for answering a call mode message, comprising steps that: a first user agent sends a call mode message of a session initiation protocol, wherein the head field contains an answer address and an answer method; when answers the message, a second user agent receiving the call mode message sends a session initiation protocol message to the answer address via the answer method pointed in the head field.

Description

The method of answering call mode message and user agent

Technical field

The present invention relates to the session initiation protocol of the communications field, relate in particular to the call mode message of session initiation protocol.

Background technology

Call model (pagermodel) message of present session initiation protocol (SIP:Session Initiation Protocol) is that the MESSAGE method is mainly used to realize transferring immediate news, specifically can be referring to corresponding the Internet engineering group IETF (Internet Engineering Task Force) standard RFC3428.Typical MESSAGE message flow mainly comprises the steps: as shown in Figure 1

The step 101. transmit leg i.e. first user agent UA1 sends MESSAGE message;

Step 102. acting server PROXY is the second user agent UA2 with this MESSAGE forwards to the recipient;

The step 103. second user agent UA2 returns the 200OK response;

Step 104. acting server PROXY is transmitted to the first user agent UA1 with this 200OK response.

MESSAGE message is not set up any session between transmit leg and recipient, so be also referred to as call model (pager model) message, however, still can reply mutually with MESSAGE message between transmit leg and the recipient, from user's angle and be unaware of and whether have real session to exist.Transmit leg can also indicate the recipient to be returned to the third party, be returned to third party's return address that Reply-To field can comprise logic in MESSAGE message, the address is generally unified resource identifiers, URIs (Uniform Resource Identifier).This Reply-To field is that sender address is different with the value of From field usually, and Reply-To field effect is basic identical in this and the Email, and the message of expression answer will send to the return address in this Reply-To field.But in the practical application sometimes the transmit leg of MESSAGE message wish that also the recipient is returned to transmit leg or third party with the mode of appointment, as the indication recipient reply with the methods such as INVITE, SUBSCRIBE of session initiation protocol.Can realize like this making the recipient trigger some business conducts based on Session Initiation Protocol with MESSAGE message, indication comprises that two other user of recipient carries out the SIP session communication as transmit leg, perhaps indicate the recipient to remove to subscribe to the state-event of a resource, perhaps indicate Conference server to initiate the invitation that participates in a conference, perhaps directly indicate the user to add meeting etc. to the participant of meeting.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of method of answering call mode message, and the reception of message can be replied in the mode of appointment.The invention allows for a kind of method of replying conversation initiating protocol message, the reception of message can be replied to a plurality of addresses of appointment.The invention allows for a kind of method of obtaining the answer situation, make the transmit leg of message get access to the answer situation of message.The invention allows for a kind of transmitting-receiving conversation initiating protocol message, make the message body that comprises appointment in the former conversation initiating protocol message in the conversation initiating protocol message of triggering.The invention allows for the user agent, can handle the relevant message of call mode message that comprises answering method.

For addressing the above problem, the technical scheme that the present invention proposes is as follows:

A kind of method of answering call mode message comprises step: first user agent sends the call mode message of session initiation protocol, wherein comprises return address and answering method; Second user agent who receives described call mode message sends corresponding conversation initiating protocol message with indicated answering method to return address when replying.

A kind of method of replying conversation initiating protocol message, comprise step: first user agent sends conversation initiating protocol message, in the content of message body, comprise the return address tabulation, and the answer of described message includes and the identical content identification of corresponding return address list content in the field to the end; Second user agent who receives described message according to the answer of described message to the end the content identification in the field from message body, take out pairing return address list content, the return address in described tabulation is replied then.

A kind of method of obtaining instant message answer situation, comprise step: first user agent transfers immediate news, answer in the CPIM of described instant message message body comprises return address in the field to the end, and comprises the indication that will obtain the answer situation in instant message disposition notification head field; Second user agent who receives described instant message is included in the answer situation and sends to described first user agent in the instant message processing notice information.

A kind of method of receiving and dispatching conversation initiating protocol message, comprise step: first user agent sends conversation initiating protocol message, be called first message, in the message body of described first message, also include the content of mime type, and the indication of the processing mode of described content to comprise described content in by the message body of the conversation initiating protocol message that described message triggered; Second user agent receives first message that first user agent sends, and triggers second user agent and send corresponding conversation initiating protocol message, is called second message, and second user agent comprises described content in the message body of described second message that sends.

A kind of user agent comprises: the transmission process module is used to receive the conversation initiating protocol message that message processing module is sent, and adopts corresponding bearing protocol that it is sent; Message processing module is used for conversation initiating protocol message is carried out encoding and decoding and affairs control; Reply processing module, be used for and message processing module interaction process and the relevant message of call mode message that comprises answering method.

Beneficial effect of the present invention is as follows: the present invention makes the recipient send corresponding conversation initiating protocol message to return address with indicated answering method by comprise return address and answering method in the call mode message that sends.Thereby realize allowing the recipient trigger the conversation initiating protocol message of appointment by sending call mode message, can also specify a field of the message that triggers or the content of message body, can realize the business function that enriches like this, and call mode message has the characteristic that storage is transmitted, even therefore the recipient is owing to some reason such as the network coverage can't be received this message at that time immediately, also can utilize the storage of call mode message to transmit characteristic, make that the recipient can be at the follow-up call mode message of receiving network side institute buffer memory, thereby can not miss some communication informations.Answer in the call mode message return address tabulation in the corresponding message body content of field to the end in addition, make it needn't in a field, directly comprise a large amount of address informations, but a plurality of addresses that will reply by this message of the tabulation of the return address in message body content indication indirectly.Also have the present invention to make the transmit leg of call mode message can recognize the answer situation by methods such as subscription and instant message processing notices.

Description of drawings

Fig. 1 is the basic messae interaction diagrams that send MESSAGE message in the prior art,

Fig. 2 is the basic messae interaction diagrams of message answering method among the present invention,

Fig. 3 is the message interaction process figure of third embodiment of the invention pocket transmission news,

Fig. 4 obtains the message interaction process figure of answer situation for fourth embodiment of the invention by subscription,

Fig. 5 is a user agent's of the present invention internal module schematic diagram.

Embodiment

With reference to Fig. 2, this figure is the basic flow sheet of message answering method among the present invention, in order to describe for simplicity, has omitted the step of acting server PROXY forwarding message, mainly comprises the steps:

Step 201, the first user agent UA1 sends the call mode message of the session initiation protocol that comprises answering method, i.e. MESSAGE message.Concrete can being returned in Reply-To the field in this message comprise return address and answering method.The content of this field is exemplified below:

Reply-To：<sip:user3@domain.com；method＝INVITE>

Wherein return address is sip:user3@domain.com, and answering method (method) is the INVITE method of session initiation protocol.Above-mentioned in addition return address can be that From the address in the field is identical with the address of transmit leg also, and expression is returned to transmit leg with the answering method of appointment like this.

Step 202, the second user agent UA2 is that the first user agent UA1 returns 200 OK response to transmit leg after receiving this MESSAGE message.Very big advantage of MESSAGE method is can buffer memory, promptly when the recipient can't receive this message as the second user agent UA2 owing to reasons such as the network coverages, MESSAGE message generally can temporarily be buffered in network side, and the server of network side generally can be replied 202 Accepted message to transmit leg.The recipient can also get access to the MESSAGE message of buffer memory later on, and this store-and-forward mechanism makes the recipient can not miss some communication informations.

Step 203, the second user agent UA2 replys to return address to be returned in Reply-To the field indicated answering method in this MESSAGE message, as triggering the transmission of corresponding conversation initiating protocol message, the second user agent UA2 sends the INVITE request as replying to return address sip:user3@domain.com in the above-mentioned example.Generally receive the user agent such as the UA2 of this MESSAGE message, can not point out the user to reply immediately, but when the user initiatively clicks the reply button of client, just whether use the indicated answering method of this MESSAGE message to reply to user prompt with the answering method of indication.Be preferably in the demonstration of message reply button on client (as the instant message client) interface of handling MESSAGE message or message entry and do some special prompting such as color, profiles etc., have special answering method to point out this message.

Answering method (method) can comprise present various session initiation protocol SIP methods, as MESSAGE, and INVITE, SUBSCRIBE, PUBLISH, REFER etc., default answering method can be INVITE, specifically can be referring to the relevant standard of Session Initiation Protocol such as RFC3261.

The first following embodiment is for to realize that based on the present invention a user agent indicates another user agent to subscribe to third-party presentation information.The first user agent UA1 sends MESSAGE message, this message be returned to comprising of Reply-To field of indicated answering method SUBSCRIBE, be exemplified below:

Reply-To：<sip:user3@domain.com？Event＝presence；method＝SUBSCRIBE>

Wherein return address is SIP URI, and has comprised reply parameter Event=presence, and indication will be subscribed to and be presented (presence) incident.The second user agent UA2 sends its presentation information of SUBSCRIBE message subscribing to return address when replying this MESSAGE message, promptly also comprised above-mentioned reply parameter in a field of replying message.Below listed the initial row and an incident Event field of this message:

SUBSCRIBE?sip:user3@domain.com?SIP/2.0

Event：presence

Can also behind answering method, directly specify reply parameter in addition, as follows:

Reply-To：<sip:user3@domain.com；method＝SUBSCRIBE？Event＝″presence″>

Except a field parameter that comprises answering method, can also in MESSAGE message body, comprise the message body of answering method.As for the SUBSCRIBE answering method in the present embodiment, the filter (FILTER) that can also in above-mentioned MESSAGE message body, comprise subscription, concrete ins and outs about filter can be referring to RFC4661, and the recipient then is included in this filter in the message body of SUBSCRIBE answering method.Can comprise plurality of kinds of contents simultaneously in the MESSAGE message body, if determine whether that according to content type needs comprise the content of message body when replying, user agent's client extensibility is bad, as then need to revise that to upgrade client just passable when having increased new content type, and be to determine whether that needs comprise the content of message body when replying according to content type and answering method etc. sometimes, so it is better directly clearly to indicate whether to comprise when replying the content of message body.

Usually the message body of MESSAGE comprises among the processing mode of the MIME field Content-Disposition in the message body of MESSAGE and will comprise the indication of message body as " reply-with " when replying for multipurpose internet mail expansion MIME (MultipurposeInternet Mail Extensions) form.The first user agent UA1 sends MESSAGE message main contents and is exemplified below:

MESSAGE?sip:user2@domain.com?SIP/2.0

Reply-To：<sip:user3@domain.com？Event＝presence；method＝SUBSCRIBE>

Content-Type：application/simple-filter+xml

Content-Disposition：reply-with

<？xml?version＝″1.0″encoding＝″UTF-8″？>

<filter-set>......</filter-set>

Foregoing has omitted the actual content of some fields and filter for simplicity's sake.The second user agent UA2 sends the filter above then comprising in the corresponding SUBSCRIBE message body when replying, the main contents of SUBSCRIBE message are as follows:

SUBSCRIBE?sip:user3@domain.com?SIP/2.0

Event：presence

Content-Type：application/simple-filter+xml

<？xml?version＝″1.0″encoding＝″UTF-8″？>

<filter-set>......</filter-set>

If in addition in the message body of MESSAGE among the processing mode of the MIME field Content-Disposition except " reply-with " (comprising the indication of message body content when promptly replying), the processing mode that also has other then will also keep these processing modes that comprise except that " reply-with " in a respective handling mode field of the message body content of answering method.In fact, the indication that whether comprises message body content is set in processing mode Content-Disposition field of message body content, purposes is widely arranged.Except in MESSAGE message, using, can also in the REFER of Session Initiation Protocol method, use, also can comprise content in the REFER message body in the message body of the conversation initiating protocol message by the REFER message trigger, concrete grammar is the same, repeats no more herein.More generally, said method can be used for all message of using the mime type content, as Email, Multimedia Message etc., in the message that institute triggers or replys, carry the content that has above-mentioned processing mode in the former message, can give the more general name of this processing mode of indication that whether comprises message body content, as " hold ".

The second embodiment of the present invention is for realizing that a user agent indicates another user agent to send MESSAGE message in the time of appointment to the third party.The first user agent UA1 sends MESSAGE message to the second user agent UA2, comprise the reply-with processing mode among first embodiment in the message body in the Content-Disposition field of content, this message be returned to comprising of Reply-To field of indicated answering method MESSAGE, and comprise turnaround time of appointment, time format can be a time point such as reply-time-at, comprise the date, Hour Minute Second and time zone, also can be a time period, the time period also can only comprise starting point such as reply-time-from or terminal point such as the reply-time-until of time.The Reply-To field contents is exemplified below:

Reply-To：<sip:user3@domain.com；method＝MESSAGE>；

reply-time-at＝2007-04-24T08:10:00.000-08:00

Or, Reply-To:＜sip:user3@domain.com; Method=MESSAGE 〉;

reply-time-from＝2007-04-24T08:10:00.000-08:00

Or, Reply-To:＜sip:user3@domain.com; Method=MES SAGE 〉;

reply-time-until＝2007-04-24T08:10:00.000-08:00

Or, Reply-To:＜sip:user3@domain.com; Method=MESSAGE 〉;

reply-time-from＝2007-04-24T08:10:00.000-08:00；

reply-time-until＝2007-04-24T10:10:00.000-08:00

The recipient of this MESSAGE message i.e. second user agent's client is preferably in and detects when arriving at hand or this turnaround time, as preceding 1 minute of turnaround time point, perhaps in the turnaround time section sometime, whether the prompting user replys this message, perhaps when the user receives this message and confirms to agree to reply this message, initiate automatically to reply in the turnaround time of appointment.If second user agent is a service server, then can initiate automatically to reply in the turnaround time of appointment after authentication passes through in that the user identity that sends this MESSAGE message is carried out.Can carry out authentication according to setting in advance some strategies that comprise user right on the service server.Especially, if transmit leg wishes that the recipient replys immediately after receiving this MESSAGE message, then can directly make parameter turnaround time of appointment be " instantly ", perhaps the value of fixed time parameter reply-time is " now ", the recipient is after receiving such MESSAGE message, whether its client preferably will reply by appointed method to user prompt immediately, perhaps directly automatically replies immediately.The content that is returned to field is exemplified below:

Reply-To：<sip:user3@domain.com；method＝MESSAGE>；instantly

Or, Reply-To:＜sip:user3@domain.com; Method=MESSAGE 〉; Reply-time=now

Can indicate the term of validity of this message in the MESSAGE message that first user agent sends with Expires and Date field, recipient i.e. second user agent had better not reply this message with the return address and the answering method of its indication again after the term of validity of MESSAGE message has been crossed.Recipient's User Agent Client can indicate this message to pass through the term of validity when expired detecting the MESSAGE message of replying.

Information turnaround time of appointment is different with the term of validity, as effective interim Date field value is 2007 04 month 24 15 o'clock sharps of afternoon, the Expires field value is 7200 seconds promptly 2 hours, then the finish time of the term of validity is points in 2007 04 month 24 afternoons 17, and the time of specify replying can be from 2007 04 month 24 at 15 o'clock in afternoon to point in 2007 04 month 24 afternoons 17.The transmit leg first user agent UA1 should make fall in the term of validity of this message the turnaround time of appointment when generating MESSAGE message, and promptly the term of validity should cover turnaround time.If directly do not provide the term of validity as the user, specify the temporal information of replying and provided, then the finish time that the user agent can the term of validity is set to specify the terminal time of information turnaround time, does not produce conflict to guarantee both.

The third embodiment of the present invention is that the meeting initiator sends MESSAGE message to conferenced party, invites participant to add meeting.The first user agent UA1 is that the meeting initiator sends MESSAGE message, and the content of the Reply-To of this a message field is exemplified below:

Reply-To：<sip:conf1@domain.com；method＝INVITE>；isfocus

Wherein return address sip:conf1@domain.com is the address of conference centre (Focus), and answering method is the INVITE method.Also having comprised features tab (Feature Tag) in addition is isfocus, represent the corresponding conference centre (Focus) of this return address, the participant that receives this message can be understood some ability information of return address in view of the above, and carry out suitable subsequent treatment, as subscribing to conference status (Conference State) to return address earlier according to the isfocus features tab, with the participant of understanding conferencing information and having added, and then whether decision sends the INVITE request to conference centre.Certain above-mentioned features tab's parameter can not be included in the answering method message of participant transmission.

The initiator of meeting initiates meeting by sending MESSAGE message, an advantage is oneself is not joined in the conference session go, present commonly used direct with the INVITE method initiate meeting then the initiator of meeting also can join in the conference session, and this is sometimes also unnecessary, does not also participate in the meeting as a secretary who organizes a meeting.Receiving the participant of inviting the MESSAGE message that adds meeting in addition also can reply this message with the adding meeting, and need not add meeting immediately when receiving invitation at any time according to the situation of oneself.Usually the participant of meeting has a plurality of people, and the initiator of meeting need notify a plurality of people to add meeting, can comprise the address list of participant in a MESSAGE message body, and needn't send a plurality of MESSAGE message respectively to each participant.As shown in Figure 3, key step is as follows:

The initiator UA1 of step 301. meeting sends MESSAGE message, comprises the address list (URI list) of conferenced party.Main message content is as follows:

MESSAGE?sip:list-service.domain.com?SIP/2.0

Reply-To：<sip:conf1@domain.com；method＝INVITE>；isfocus

Content-Type：application/resource-lists+xml

Content-Disposition：recipient-list

<？xml?version＝″1.0″encoding＝″UTF-8″？>

<resource-lists?xmlns＝″urn:ietf:params:xml:ns:resource-lists″><list>

<entry?uri＝″sip:user2@domain.com″/>

<entry?uri＝″sip:user3@domain.com″/>

</list></resource-lists>

Wherein the request address Request URI of this message is sip:list-service.domain.com, corresponding mass-sending server (MESSAGE URI-list Service).

After step 302. mass-sending server receives this MESSAGE message, return the 202Accepted response to transmit leg.

Step 303 and 304. mass-sending servers detect that content Type C ontent-Type is the address list URI list content of application/resource-lists+xml in this message body, and processing mode Content-Disposition is recipient-list, indicates according to distribute this MESSAGE message to described address list.Then mass-send server each URI address in address list and send MESSAGE message respectively, and the content that in the MESSAGE of each distribution message, all comprises Reply-To field of original MESSAGE message, if also comprise other guide in the original MESSAGE message body, then should mass-send server and also it should be included in each MESSAGE message of being distributed.The partial content of distribution MESSAGE message is exemplified below:

MESSAGE?sip:user2@domain.com?SIP/2.0

Reply-To：<sip:conf1@domain.com；method＝INVITE>；isfocus

Distribute the address list (URI list) that can also comprise above-mentioned participant in the MESSAGE message body in addition, but processing mode Content-Disposition will change recipient-list-history into, and the historical information of the participant address list that is distributed of this message is informed in expression.

Step 305 and 306. receives the user agent of the mass-sending server MESSAGE message of distributing such as UA2 and UA3 and initiates the INVITE request to conference centre (Focus) address that Reply-To field comprises respectively.

In meeting is carried out,, also can send MESSAGE message and invite the adding meeting in addition to it if wish to invite a new user to add this meeting.Manager as meeting can indicate conference centre to send MESSAGE message, can also comprise conferencing information in MESSAGE message body, as the current participant tabulation of meeting, information such as the theme of meeting and time.

Also having when a conference centre uses INVITE invites a user to add meeting, and the user can't add meeting at that time, as user's terminal closedown or do not register in network, then conference centre can send an above-mentioned MESSAGE message to this user and indicates it follow-uply can add meeting.

How the transmit leg that fourth embodiment of the present invention emphasis has been described MESSAGE message obtains the answer situation of this message.After a user or server had sent a MESSAGE message that comprises Reply-To field, a lot of situations all wished to recognize the answer situation of this MESSAGE message, as whether reverting back to merit etc.Provide several method in the present embodiment and realized that transmit leg obtains the answer situation, at first described the technical scheme of obtaining the answer situation by the mode of subscribing to below.Referring to shown in Figure 4, mainly comprise the steps:

The step 401. first user agent UA1 sends and comprises the MESSAGE message of answering method, and comprises the indication of whether subscribing to the answer situation in the message header field.As can in Reply-To field, comprising the indication of whether subscribing to the answer situation, message sender is subscribed to the answer situation incident of this message.The content of Reply-To field is exemplified below:

Reply-To：<sip:user3@domain.com；method＝INVITE>；msg-sub＝true

That wherein whether subscribes to the answer situation is designated as parameter m sg-sub, indicates to subscribe to answer situation incident when its value for true, represents not subscribe to during for false, and default can being made as do not subscribed to.

Can also comprise the indication of whether subscribing to the answer situation with SIP field such as Msg-Sub separately in this message in addition, the content of this field is exemplified below: Msg-Sub:true

The second user agent UA2 that step 402. receives this message returns 200 OK response.

Step 403. is when the second user agent UA2 detects when comprising the indication that will subscribe to answer situation incident in this MESSAGE message, generate a subscription (subscription) of this message being replied the situation incident, and produce corresponding notice NOTIFY to the first user agent UA1, thereby make the first user agent UA1 know the answer situation of this MESSAGE message, as whether successfully replied etc.And the dialogue identifier of this subscription session (unique definite by label among field From, the To and Call-ID) is complementary with MESSAGE's.

But not final recipient's other entities such as message stores forwarding server (Message Relay) are generally replied 202 Accepted response when receiving this message, should not produce the subscription in the step 403.

The second user agent UA2 is after receiving the above-mentioned MESSAGE message that comprises answering method indication, in fact the subscribe request of this message being regarded simultaneously as a message answer situation incident, and in incident Event field of the notification message that sends to the first user agent UA1, comprise the title of answer situation incident, and as: Event:msg-reply

Subscription is created the back second user agent UA2 will send a notice to the first user agent UA1 immediately.The answer situation that can comprise 100 responses in this notice usually, expression message present, main contents are exemplified below:

NOTIFY?sip:user1@domain.com?SIP/2.0

Content-Type：message/sipfrag；version＝2.0

SIP/2.0100?Trying

Ask to create the subscription that message is replied the situation incident if there is the user agent directly to send SUBSCRIBE, then the second user agent UA2 should return 403 responses and refuse this subscription.Do not wish to keep subscribing to if receive the user agent UA2 of MESSAGE, then directly produce a NOTIFY notification message that finishes to subscribe to and give UA1, as:

NOTIFY?sip:user1@domain.com?SIP/2.0

Subscription-State：terminated；reason＝rejected

Follow-up answer situation then can not be notified to UA1.The duration of this subscription is to be determined by the user agent UA2 that receives MESSAGE message the refresh cycle in addition, specifies in the expires parameter in the subscription status Subscription-State that returns a notification message field.General UA1 should go to refresh before this subscription expires.Usually after message is replied successfully, UA2 this subscription that just can terminate.

UA2 sends MIME message body that should comprise " message/sipfrag " type in the message body of notifying NOTIFY, the situation of coming Indication message to reply, and the content of message body is exemplified below:

SIP/2.0200 OK, expression is replied successfully;

SIP/2.0503 Service Unavailable, failure is replied in expression.

Return 200 OK response after the step 404. first user agent UA1 is notified.

Step 405. second user agent UA2 answering method is as indicated replied to the 3rd user agent UA3.

The step 406. second user agent UA2 sends the answer situation and is notified to the first user agent UA1.

The step 407. first user agent UA1 returns the 200OK response to UA2 in notified back.

If in the dialogue (dialog) a plurality of MESSAGE are arranged, be that UA2 has received a more than MESSAGE and had same dialogue identifier, at this moment in the subscription that second and follow-up MESSAGE produce, UA1 need in Event field of notification message, comprise identification parameter, so that can distinguish the subscribing notification that different MESSAGE message produce.In same dialogue, successively send two MESSAGE message as UA1, indicate UA2 to reply respectively, be as first MESSAGE message part content to two different URI to UA2:

MESSAGE?sip:user2@domain.com?SIP/2.0

Reply-To：<sip:user3@domain.com；method＝INVITE>

Call-ID：asd88asd77a@1.2.3.4

CSeq：1MESSAGE

Second MESSAGE message part content:

MESSAGE?sip:user2@domain.com?SIP/2.0

Reply-To：<sip:user4@domain.com；method＝INVITE>

Call-ID：asd88asd77a@1.2.3.4

CSeq：2?MESSAGE

As seen above-mentioned two MESSAGE have different CSeq field values.Then the identification parameter of Event field comprises the sequence number value of CSeq field in the notification message that second MESSAGE message is produced, and is as follows:

NOTIFY?sip:user1@domain.com?SIP/2.0

Call-ID：asd88asd77a@1.2.3.4

Event：msg-reply；id＝2

Content-Type：message/sipfrag；version＝2.0

Content-Length：20

SIP/2.0100?Trying

Because MESSAGE message does not need to reply immediately under a lot of situations, after for a long time, just can reply possibly, therefore the method with SUBSCRIBE is also improper sometimes, and is just passable because subscription will constantly refresh always.UA1 separately with a stature field such as a Reply-Notification, comprises the indication that will obtain the answer situation in the MESSAGE message that sends, as:

Reply-Notification：true

UA2 provides the answer situation then can realize by sending a MESSAGE message that comprises the answer situation to UA1.The content of this MESSAGE message is exemplified below:

MESSAGE?sip:user1@domain.com?SIP/2.0

In-Reply-To：asd88asd77a@1.2.3.4

Content-Type：message/sipfrag；version＝2.0

SIP/2.0200OK

Value in the field of In-Reply-To wherein is identical with the Call-ID of the MESSAGE that UA1 sends.For the situation of a plurality of MESSAGE of dialogue, the similar sequence number value that can in the In-Reply-To field, comprise CSeq field with the id parameter, as:

In-Reply-To：asd88asd77a@1.2.3.4；id＝2

When comprising the message body of CPIM (Common Presence andInstant Messaging) form in the MESSAGE message that UA1 sends, can also use another to obtain the method for replying advisory, expand instant message exactly and handle notice (Instant Message DispositionNotification), increase a kind of processing notice, promptly reply notice.Existing processing notice mainly comprises transmission (Delivery) notice and reading (Read) etc.Specifically can be about the CPIM form referring to standards such as RFC3862, the CPIM form is used for transferring immediate news usually, might not carry with SIP MESSAGE certainly, can also use other messaging protocol to carry.Using the benefit of CPIM message is to be beneficial to the intercommunication of carrying out instant message between the heterogeneous networks, even heterogeneous networks will carry the agreement difference of instant message, as long as all use the CPIM form in the message body, then the gateway between network is easy to change.

Concrete, the instant message of UA1 in the MESSAGE message that sends handled in Disposition-Notification field of notice and comprised the indication such as the reply that will obtain the answer situation, and this message part content is exemplified below:

Content-type：Message/CPIM

Reply-To：http://www.ietf.org

NS：imdn<urn:ietf:params:cpim-header?fields:imdn>

imdn.Message-ID：34jk324j

imdn.Disposition-Notification：reply

Notice that Reply-To field herein is a field of CPIM message body, rather than a field of MESSAGE message, a field such as the From of CPIM message body itself and To are omitted for simplicity's sake herein in addition.The return address of the field of the Reply-To here is a network address, also can be an instant message address etc., as " im:user1@domain.com.com ".Present embodiment uses MESSAGE message as example carrying CPIM message body, also can adopt other agreements such as agreements such as HTTP, SMTP in the reality.The answer advisory message part content that UA2 generates is exemplified below:

Content-type：Message/CPIM

NS：imdn<urn:ietf:params:cpim-header?fields:imdn>

Content-type:message/imdn+xml

Content-Disposition:notification

<？xml?version＝″1.0″encoding＝″UTF-8″？>

<imdn?xlmns＝″urn:ietf:params:xml:ns:imdn″>

<message-id>34jk324j</message-id>

<reply-to-uri>http://www.ietf.org</reply-to-uri>

<note?lang＝″en″>This?IM?has?been?replied</note>

</imdn>

Wherein at content type for having comprised answer situation information in the message body of " message/imdn+xml ", as daughter element＜status value＜replied/ of comprising represented that the MESSAGE message that UA1 sends is replied.Also have the daughter element＜message-id in the message body〉a field of the MESSAGE message that sends as " 34jk324j " and UA1 of value in instant message to handle the Message-ID value of notice identical, this answer advisory message can uniquely match that MESSAGE message of UA1 transmission like this.Omitted partial content in the message body for simplicity's sake.If return address has a plurality ofly in addition, the situation as the 5th embodiment describes then can comprise the return address tabulation, as comprising a plurality of return address＜reply-to-uri in the example of above-mentioned notification message content in replying advisory message body〉element.Perhaps use a list element as＜reply-to-list〉comprise a plurality of return address daughter elements as＜reply-to-uri 〉.

The fifth embodiment of the present invention has been described the situation that will be returned to a plurality of addresses.Only comprise a return address in general Reply-To field, if wish to be returned to a plurality of addresses, can adopt following scheme, return address tabulation (URI list) is included in the MESSAGE message body, and in Reply-To field, comprises and the identical content identification Content-ID of corresponding return address list message body.The partial content of the MESSAGE message that the first user agent UA1 sends is exemplified below:

MESSAGE?sip:conf-123@domain.com；SIP/2.0

Reply-To：<cid:cn35t8jf02@domain.com>

Content-Type：application/resource-lists+xml

Content-Disposition：reply-list

Content-ID：<cn35t8jf02@domain.com>

<？xml?version＝″1.0″encoding＝″UTF-8″？>

<resource-lists?xmlns＝″urn:ietf:params:xml:ns:resource-lists″>

<list>

<entry?uri＝″sip:user2@domain.com″/>

<entry?uri＝″sip:user3@domain.com″/>

</list>

</resource-lists>

Comprised two return address in the return address tabulation (URI list) in the above-mentioned message body, comprise the answering method parameter in the address, as sip:user3@domain.com? method=MESSAGE defaults to the INVITE method.Indicating this content in addition in processing mode Content-Disposition field of content will handle by replying tabulation reply-list.

Receive the user agent UA2 of this message, it in the present embodiment conference centre, its address is sip:conf-123@domain.com, to from the message body of Reply-To field corresponding content sign Content-ID, take out the return address tabulation, and reply accordingly respectively, invite the adding meeting as sending the INVITE request.

The situation that MESSAGE message is sent to a plurality of people has been described in the 3rd above-mentioned embodiment, as M recipient, if and the technical scheme that the 5th embodiment provides is used in combination, be that each people who receives this MESSAGE message is returned to a plurality of addresses again, as N return address, can produce MN message by a message like this, if there are a large amount of this message to produce bigger influence to network, particularly be used to malicious act, therefore preferably forbid the generation of this situation.If a user agent receives a MESSAGE message, not only to be returned to a plurality of addresses by Reply-To field indication, but also this message to be distributed to a plurality of recipients, then should return 403 Forbidden to the transmit leg of this message and forbid response.

Comprise the conversation initiating protocol message of Reply-To field for other, also can comprise a plurality of return address by said method.

The UA2 of reception MESSAGE message for security reasons, generally should not reply this message by the indication in Reply-To the field automatically, can whether wish to reply this message to user prompt, and fully present the details of replying message, as return address URI, answering methods etc. are replied after the user confirms again.The other second user agent UA2 can inform preferably that when the 3rd user agent UA3 replys UA2 replys according to the indication of UA1, and the 6th following embodiment has described and how to have addressed this problem.

When UA2 replies to UA3 at the transmission sip message, can comprise the identity information of UA1, point out that this sip message is triggered by the MESSAGE who sends out, can make UA3 understand more information like this, thereby how decision handle this sip message in a field of message.

In order to prevent that UA2 from providing false information to UA3; the first user agent UA1 can be when sending MESSAGE message; use a stature field to comprise oneself identification identifier URI, optional the signing messages that can also comprise a S/MIME type is with protection identify label and and the authenticity of indicated answering method.When the second user agent UA2 that receives this message according to the answering method of UA1 indication when UA3 sends sip message, with above-mentioned identify label and facsimile signature in this sip message.If do not comprise signing messages or signing messages when invalid, UA3 can point out to provide effective identity signature to UA2 in returning response, as return Session Initiation Protocol 429 the response, UA2 can return the notice indication to UA1 again need provide effective identity signature, can notify in the answer situation as UA2, the notification message partial content is exemplified below:

MESSAGE?sip:user1@domain.com?SIP/2.0

<？xml?version＝″1.0″encoding＝″UTF-8″？>

<imdn?xlmns＝″urn:ietf:params:xml:ns:imdn″>

<message-id>34jk324j</message-id>

<reply-to-uri>sip:user3@domain.com</reply-to-uri>

<status><response>SIP/2.0429?Provide?Referrer?Identity<response/></status>

</imdn>

Wherein at the state＜status of IMDN message body〉element＜response〉comprise the answer code that UA3 returns in the daughter element.As increasing identity indicating head field such as Referred-By in the MESSAGE message that sends at UA1, comprise identity information such as the SIP URI of UA1, and content identification parameter c id, the signing messages in the corresponding message body, the main contents of message are exemplified below:

MESSAGE?sip:user2@domain.com?SIP/2.0

Reply-To：<sip:user3@domain.com；method＝INVITE>

Referred-By：<sip:user1@domain.com>

；cid＝″20398823.2UWQFN309shb3@domain.com″

Content-Type：multipart/mixed；boundary＝unique-boundary-1

It more than is the partial content of the message header of MESSAGE, be the message body of a manifold mixed content types below, each part is cut apart as " unique-boundary-1 " with border boundary, and "--unique-boundary-1--" row finishes message body until following.

--unique-boundary-1

Content-Type：multipart/signed；protocol＝″application/pkcs7-signature″；

micalg＝sha1；boundary＝dragons39

Content-ID：<20398823.2UWQFN309shb3@domain.com>

The content identification Content-ID of this a part of message body is corresponding with the cid of Referred-By field.Its content of information representation in the content type is a signing messages, also is a manifold content, and cuts apart with border " dragons39 ".

--dragons39

Content-Type：message/sipfrag

Content-Disposition：aib；handling＝optional

Date：Tue，24Apr?2007?10:00:00?GMT

Expires：7200

Reply-To：<sip:user3@domain.com；method＝INVITE>

Referred-By：<sip:user1@domain.com>

；cid＝″20398823.2UWQFN309shb3@domain.com″

--dragons39

Above this partial content comprised the original plaintext of the information that will sign, as Date, Expires, Reply-To, the content of Referred-By etc. fields.

Content-Type：application/pkcs7-signature；name＝smime.p7s

(signed data)

--dragons39--

This part has comprised the signed data after the original plaintext in the last branch encrypted, and particular content omits.

--unique-boundary-1--

When the second user agent UA2 that receives this message according to the answering method of UA1 indication when UA3 sends sip message, Referred-By field in the above-mentioned MESSAGE message and the corresponding signing messages of content identification are copied in this sip message together.Be exemplified below to the INVITE content that UA3 sends as UA2:

INVITE?sip:user3@domain.com?SIP/2.0

Referred-By：<sip:user1@domain.com>

；cid＝″20398823.2UWQFN309shb3@domain.com″

Content-Type：multipart/mixed；boundary＝unique-boundary-2

--unique-boundary-2

(SDP)

--unique-boundary-2

micalg＝sha1；boundary＝dragons39

Content-ID：<20398823.2UWQFN309shb3@domain.com>

(signing messages)

--unique-boundary-2--

The UA3 that receives this INVITE request detects and comprises Referred-By field and signing messages among this INVITE, then can verify signing messages.If the Expires field is arranged in signing messages, its value is a second number, then UA3 detects after the term of validity of having passed through this Expires field indication (need and the Date field is determined jointly), the term of validity that should pass through the UA1 appointment to the sip message of user prompt UA2 transmission.Because UA1 may only wish that UA2 replys to UA3 in certain term of validity, UA3 can not reply expired answer.

Seventh embodiment of the invention has been described the nested call mode message that comprises Reply-To field, and the message part content is exemplified below:

MESSAGE?sip:user2@domain.com?SIP/2.0

Reply-To：<sip:user3@domain.com；

method＝MESSAGE？Reply-To＝″<sip:user4@domain.com>″>

The first user agent UA1 has sent above-mentioned MESSAGE message to the second user agent UA2, indicates the second user agent UA2 to reply to UA3, and its answering method is a MESSAGE message, and indicates this MESSAGE message to reply to UA4 with default method.If UA1 provides identity indicating head field and signing messages in this case, then follow-up UA2 comprises identity indicating head field and the signing messages that UA1 provides to UA3, UA3 to UA4, UA2 can not use identity indicating head field and the signing messages of oneself, so that final receiver UA4 understands the information of the most original transmit leg UA1.Reply advisory in addition and return successively, promptly UA4 replys sip response and gives UA3 as 200 OK, and UA3 will reply advisory (information that comprises 200 OK response) and give UA2, and UA2 is transmitted to UA1 with it again.

As shown in Figure 5, user agent of the present invention comprises three basic modules: transmission process module S53, message processing module S52 and answer processing module S51.Wherein transmission process module is used to receive the sip message that the message processing module on upper strata is sent, and adopts corresponding bearing protocol such as UDP (UserDatagram Protocol) or TCP (Transmission Control Protocol) that it is sent.Message processing module is used for sip message is carried out encoding and decoding and affairs control etc.Reply processing module and be used to carry out the processing relevant with the MESSAGE message that comprises answering method etc., message that will be relevant with answer is by the message processing module encoding and decoding and manage the respective transaction messaging.Replying processing module can indicate described message processing module to comprise the answering method of appointment in being about to the call mode message that sends, perhaps receive the relevant message of the call mode message with comprising answering method of having decoded from message processing module, and reply processing, as produce corresponding answer message or produce the relevant notification message of answer situation subscription etc.Replying processing module can also carry out finishing function corresponding alternately with time detecting module S511, signature processing module S512, distribution processor module S513, answer situation processing module S514 etc.As detecting the turnaround time described in second embodiment by the time detecting module at hand the time, can point out the user whether to reply this message; Perhaps when the user receives this message and confirms to agree to reply this message, the time detecting module is initiated to reply in the notice answer turnaround time of appointment processing module automatically, answer processing module message call processing module is encoded to the message of replying and is generated correspondent transaction, replys message and finally sends with agreements such as UDP or TCP by the transmission process module.The answer processing module can also send in the MESSAGE message that comprise answering method soon by the signature processing module increases signing messages; Perhaps the MESSAGE message of receiving that comprises answering method is generated corresponding answer situation subscription by replying the situation processing module; Perhaps the MESSAGE message that comprises answering method and return address tabulation that will receive by the distribution processor module adopts the method for the 5th embodiment to produce a plurality of people is replied message.The user agent in fact generally has transmit leg such as UA1 in the foregoing description, UA2 and UA3 and recipient's disposal ability simultaneously, can be arranged in user terminal such as mobile phone, personal computer etc., also can be arranged in application server.

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

1, a kind of method of answering call mode message is characterized in that, comprises step:

First user agent sends the call mode message of session initiation protocol, wherein comprises return address and answering method;

Second user agent who receives described call mode message sends corresponding conversation initiating protocol message with indicated answering method to return address when replying.

2, method according to claim 1 is characterized in that, the answer of the call mode message of the session initiation protocol that sends described first user agent comprises return address and answering method in the field to the end;

Second user agent who receives described call mode message is when replying, and indicated answering method sends corresponding conversation initiating protocol message to return address in the field to reply to the end.

3, method according to claim 2 is characterized in that, the answer of described call mode message also comprises reply parameter in the field to the end, and then described second user agent sends in the field of corresponding conversation initiating protocol message and comprises described reply parameter.

4, method according to claim 2 is characterized in that, the answer of described call mode message also comprises the features tab in the field to the end, and described features tab indicates the ability information of return address.

5, method according to claim 2, it is characterized in that, first user agent sends the call mode message of session initiation protocol to the mass-sending server, comprise address list in the message body content of described message, described mass-sending server is distributed message according to address list, and the answer that all comprises original call mode message in the message of each distribution is the content of field to the end, and the message of one of them distribution has sent to described second user agent.

6, method according to claim 1, it is characterized in that, described first user agent sends the call mode message of session initiation protocol, in message body, comprise the return address list content, the answering method parameter that also comprises the return address correspondence in the described tabulation, and the answer of described message includes and the identical content identification of corresponding described list content in the field to the end;

Second user agent who receives described call mode message according to the answer of described message to the end in the field content identification from message body, take out pairing list content, the return address in described tabulation is replied with corresponding answering method then.

7, method according to claim 6 is characterized in that, the step that described second user agent replys comprises:

The return address of second user agent in described tabulation sends message respectively and replys;

Perhaps, when second user agent replys, send one to the mass-sending server and reply message, comprise described return address tabulation in the message body, reply message to each return address distribution by described mass-sending server.

8, according to each described method of claim 1 to 7, it is characterized in that, also include the content of mime type in the message body of described call mode message, the indication of its processing mode will comprise described content when replying this message, then described second user agent sends in the message body of corresponding conversation initiating protocol message and comprises described content.

9, according to each described method of claim 1 to 7, it is characterized in that, also comprise turnaround time in the described call mode message, then described second user agent is detecting when arriving at hand or described turnaround time,

Whether the prompting user replys this message;

Perhaps, when second user agent detects the user and confirms agree to reply this message, send corresponding conversation initiating protocol message automatically in the turnaround time of appointment;

Perhaps, second user agent carries out sending corresponding conversation initiating protocol message automatically in the turnaround time of appointment after authentication passes through to the user identity of described transmission call mode message.

10, method according to claim 9, it is characterized in that, also comprise the term of validity in the described call mode message, the described term of validity covers described turnaround time, and second user agent indicates this message to pass through the term of validity when expired detecting the message of replying;

Perhaps, the message of the term of validity has been passed through in the direct deletion of second user agent.

According to each described method of claim 1 to 7, it is characterized in that 11, second user agent who receives described call mode message returns the answer situation to described first user agent.

12, method according to claim 11, it is characterized in that, second user agent who receives described call mode message produces a subscription automatically returning 200 OK response back, and the answer situation is included in sends to described first user agent in the notification message.

13, method according to claim 11, it is characterized in that, described first user agent sends instant message in the call mode message of session initiation protocol and handles in the notice field and comprise the indication that will obtain the answer situation, and second user agent who receives described call mode message is included in the answer situation and sends to described first user agent in the instant message processing notice information.

14, according to each described method of claim 1 to 7, it is characterized in that, described first user agent sends in the call mode message of session initiation protocol and also comprises an identity indicating head field, described identity indicating head field comprises first user agent's identify label and content identification parameter, the signing messages content of the corresponding message body of described content identification parameter;

When second user agent who receives described call mode message replys, identity indicating head field in the described message and the pairing signing messages of content identification parameter are copied in the conversation initiating protocol message that is sent together.

15, method according to claim 14, it is characterized in that, second user agent sends to the 3rd user agent with the conversation initiating protocol message of replying, described the 3rd user agent detects and comprises identity indicating head field in the described conversation initiating protocol message, then described signing messages is verified;

If comprise the term of validity in the signing messages, then to detect the term of validity out-of-date as the 3rd user agent, the term of validity that the conversation initiating protocol message that sends to user prompt second user agent has passed through first user agent's appointment.

16, a kind of method of replying conversation initiating protocol message is characterized in that, comprises step:

First user agent sends conversation initiating protocol message, comprise the return address tabulation in the content of message body, and the answer of described message includes and the identical content identification of corresponding return address list content in the field to the end;

Second user agent who receives described message according to the answer of described message to the end the content identification in the field from message body, take out pairing return address list content, the return address in described tabulation is replied then.

17, method according to claim 16 is characterized in that, the step that described return address in described tabulation is replied comprises:

18, method according to claim 16 is characterized in that, also comprises the answering method parameter in the described return address tabulation, and second user agent replys according to the answering method of return address correspondence.

19, a kind of method of obtaining instant message answer situation is characterized in that, comprises step:

First user agent transfers immediate news, and the answer in the CPIM of described instant message message body comprises return address in the field to the end, and comprises the indication that will obtain the answer situation in instant message disposition notification head field;

Second user agent who receives described instant message is included in the answer situation and sends to described first user agent in the instant message processing notice information.

20, a kind of method of receiving and dispatching conversation initiating protocol message is characterized in that, comprises step:

First user agent sends conversation initiating protocol message, be called first message, in the message body of described first message, also include the content of mime type, and the indication of the processing mode of described content to comprise described content in by the message body of the conversation initiating protocol message that described message triggered;

Second user agent receives first message that first user agent sends, and triggers second user agent and send corresponding conversation initiating protocol message, is called second message, and second user agent comprises described content in the message body of described second message that sends.

21, a kind of user agent is characterized in that, comprising:

The transmission process module is used to receive the conversation initiating protocol message that message processing module is sent, and adopts corresponding bearing protocol that it is sent;

Message processing module is used for conversation initiating protocol message is carried out encoding and decoding and affairs control;

Reply processing module, be used for and message processing module interaction process and the relevant message of call mode message that comprises answering method.

22, user agent according to claim 21 is characterized in that, described answer processing module is handled the message relevant with the call mode message that comprises answering method and is specially:

Indicate described message processing module in being about to the call mode message that sends, to comprise the answering method of appointment; And/or,

Receive the relevant message of the call mode message with comprising answering method of having decoded from message processing module, and reply processing.

23, according to claim 21 or 22 described user agents, it is characterized in that, also comprise following at least one module:

The time detecting module, notice was replied processing module prompting user and whether was replied this message at hand the time turnaround time that is used to detect call mode message, perhaps the turnaround time of appointment notice reply processing module and initiate automatically to reply;

The signature processing module is used for increasing signing messages at the call mode message that comprises answering method that is about to by replying the processing module transmission;

Answer situation processing module is used for that the call mode message of receiving that comprises answering method is generated corresponding answer situation and subscribes to, and sends corresponding notification message by replying processing module;

The distribution processor module, the call mode message that comprises answering method and return address tabulation that is used for receiving produces replys message to a plurality of people, and sends by replying processing module.