KR101108776B1 - METHOD FOR delivering Message based on CPM service and server thereof - Google Patents

Abstract

The present invention provides a message delivery method in a converged IP messaging (CPM) server. The message delivery method includes determining whether to forward a message received from a source terminal; When determining to forward the message, determining whether to store the message on a message storage server based on user settings or policies; Requesting the message storage server to store the message when storing the message; Receiving a response message including information on the stored message from the message storage server; Checking whether there is at least one terminal among terminals of a receiver capable of receiving a message from the source terminal based on the user setting or policy; The method may include transmitting a message including the information to at least one terminal of the receiver according to a result of the checking.

Description

METHOD FOR delivering Message based on CPM service and server

The present invention relates to a converged IP messaging (CPM) service.

Today there are various services that can send and receive messages through mobile devices, such as SMS, MMS and email services.

However, there are various services that can send and receive messages as described above. Recently, there have been attempts to integrate the services. Among these attempts is the Converged IP Messaging (CPM) service.

The CPM service is a service that allows a user to send and receive a CPM message in an IMS (IP Multimedia Subsystem) environment. The CPM supports a pager mode message and a session mode message environment. In addition, the CPM service supports not only discrete media but also continuous media.

1 is a block diagram showing the configuration of a network and a terminal for a CPM service.

Referring to FIG. 1, there is shown a terminal 10, a SIP / IP network 50, a message storage server 60, an interworking server 70, and a CPM server 80.

First, the terminal 10 includes a message storage client 11 and a CPM client 12. The message storage client 11 stores messages transmitted and received, and synchronizes the stored messages with the message storage server 60.

The SIP / IP network 50 may be an IMS based network.

The message storage server 60 receives a message from the CPM server 80 and stores a message, media and conversation history that are transmitted and received according to a user's preference. The message storage server 60 may share data through synchronization with the terminal 10. That is, the message storage server 60 receives and stores a message stored in the terminal 10, and transmits a message stored in the message storage server 60 to the terminal 10.

This message storage server 60 uses the IMAP protocol for the synchronization. Thus, the message storage server 60 plays the role of an IMAP server, and the terminal 10 operates as an IMAP client.

The interworking server 70 includes an interworking function unit 71 and an interworking selection function unit 72. The interworking function unit 71 is responsible for converting CPM messages into SMS, MMS, etc., or converting SMS, MMS, etc. into CPM messages. The interworking selection function unit 72 is responsible for determining whether to convert.

The CPM server 80 includes a CPM Participating Function Server 81 and a CPM Controlling Function Server 82. The CPM PF server 81 transfers a message to the message storage server 60. In addition, the CPM PF server 81 transmits and receives a message with the CPM client 12 of the terminal 10.

2 is an exemplary diagram illustrating a process of transmitting and receiving a CPM message.

As can be seen with reference to Figure 2, the terminal A1 (10A) of the user A, the terminal B1 and terminal B2 (10B) of the user B, the home network of the user A, the home network of the user B, and the message Storage server 60 is shown. The user A's home network includes a SIP / IP network 50A and a CPM PF server 81A. The home B's home network includes a SIP / IP network 50B and a CPM PF server 81B.

First, at the request of the user A, the terminal A1 10A transmits a CPM message to the CPM PF server 81A through the SIP / IP network 50A (S01 and S02). The CPM PF server 81A sends the CPM message through the SIP / IP network 50A in the user A's home network and the SIP / IP network 50B in the user B's home network. (S03, S04, S05).

When receiving the CPM message, the CPM PF server 81B transmits the CPM message to the terminal B1 10B of the user B through the SIP / IP network 50B (S06 and S07).

In addition, when the CPM PF server 81B receives the CPM message, the CPM PF server 81B transmits the message to the terminal B2 10B of the user B through the SIP / IP network 50B (S08 and S09).

The terminal B1 (10B) and the terminal B2 (10B) of the user B respectively transmits an OK message to the CPM PF server 81B through the SIP / IP network 81B in the user B's home network (S10, S11).

The CPM PF server 81B receives the OK message, via the SIP / IP network 50B in the home network of User B and the SIP / IP network 50A in the home network of User A. The user A transmits to the CPM PF server 81A (S12 to S15).

When the CPM PF server 81A in the user A's home network receives the OK message, the CPM PF server 81A transfers the OK message to the terminal A1 10A that has transmitted the CPM message (S16).

The above shows the delivery process of the CPM message. Hereinafter, an example in which the transmitted and received messages are stored in the message storage server 60 will be described.

3 is a flowchart illustrating an operation of a message storage server illustrated in FIG. 1 and a synchronization process of a message.

Processes S21 to S25 illustrated in FIG. 3 are the same as processes S01 to 05 illustrated in FIG. 1, and thus the contents of FIG.

When the CPM PF server 81B in the user B's home network receives the CPM message by the terminal A1, the subscriber of the user B decides whether to store and transmit the CPM message in the message storage server 60. The determination is made based on the information (S26).

When determining to store and forward the CPM message, the CPM PF server 81B transmits the CPM message to the message storage server 60 (S27).

The message storage server 60 stores the received CPM message (S28), and transmits an OK message to the CPM PF server 81B (S29). In this case, it is assumed that the first message and the second message exist in the message storage server 60, and the first and second messages are previously synchronized with the terminal B1 10B. In addition, an identifier indicating that the received CPM message is not synchronized with the terminal B1 10B is stored in the message storage server 60.

The CPM PF server 81B transmits the CPM message to the terminal B1 10B through the SIP / IP network 50B (S30).

When the terminal B1 10B receives the CPM message, the terminal B1 10B stores the CPM message in the message storage client (S31). In this case, it is assumed that the first message and the second message exist in the terminal B1 10B, and the first and second messages are previously synchronized with the message storage server 60. In addition, an identifier indicating that the received CPM message is not synchronized with the message storage server 60 is stored in the terminal B1 10B.

In addition, the terminal B1 10B transmits an OK message to the CPM PF server 81B through the SIP / IP network 81B in the home network of the user B (S32).

The CPM PF server 81B receives the OK message, via the SIP / IP network 50B in the home network of User B and the SIP / IP network 50A in the home network of User A. The user A transmits to the CPM PF server 81A (S33 to S35).

When the CPM PF server 81A in the user A's home network receives the OK message, the CPM PF server 81A transfers the OK message to the terminal A1 10A that has transmitted the CPM message (S36).

Meanwhile, in order to synchronize with the message storage server 60, the terminal B1 10B transmits a synchronization request message to the message storage server 60 (S37).

Then, the message storage server 60 checks whether there is a message which is not synchronized with the terminal B1 10B. At this time, if it is confirmed that the newly stored CPM message is not synchronized by the identifier, it notifies the terminal B1 (10B) that the new message exists (S38).

When the terminal B1 determines that an unreceived message exists based on the notification (S39), the terminal B1 requests the unreceived message to the message storage server 60 (S40).

The message storage server 60 transmits the CPM message to the terminal B1 10B (S41). However, the CPM message is that the terminal B1 (10B) has already received in step S30, the terminal B1 (10B) will receive the same CPM message repeatedly.

On the other hand, if the terminal B1 (10B) confirms that the message stored in the step S31 is not yet synchronized by the identifier, it is determined that there is an untransmitted message (S42), and the CPM message to the message storage server Transmit to 60 (S43).

However, since the CPM message is already received by the message storage server 60 in step S27, the CPM message is repeatedly received with the same CPM message.

As described above, the message storage server 60 provides a storage function of the transmitted and received messages, and provides a synchronization function of the message, but has a technical problem that the same message is repeatedly transmitted and stored.

In addition, there is a problem in that network resources are wasted by overlapping and transmitting the same message. In general, one user is known to send and receive an average of about 10 messages per day. Therefore, if there are 100 users in the network, the problem of wasting network resources can be very serious due to duplicate messages.

In addition, the terminal 10 is generally a portable device, the memory size is limited, there is a problem that wastes the memory due to the storage of the redundant message. In particular, users are generally known to send and receive about 10 messages per day. However, due to such redundant storage, a large number of unnecessary messages are stored in the user's terminal device, which also accelerates the lack of storage space and causes inconvenience to the user frequently deleting the message.

Accordingly, an object of the present invention is to solve the above problems.

That is, an object of the present invention is to enable efficient use of network resources by avoiding redundant transmission and reception and storage of messages.

In addition, an object of the present invention is to ensure that the memory in the terminal can be used efficiently by avoiding redundant storage of messages.

In order to achieve the above object, the present invention provides a Converged IP Messaging (CPM) server. The server identifies registered target terminals capable of receiving a message from a source terminal based on a user setting, determines whether to deliver a message from the source terminal to the identified target terminal based on the user setting, and A processor for determining whether to store the message in a message storage server based on the user setting when determining to forward the message; If it is determined that the message is to be stored, requesting the message storage server to store the message, and if a response message including information about the stored message is received from the message storage server, the message is included in the message. It may include a transceiver for transmitting to the target terminal.

Meanwhile, in order to achieve the above object, the present invention provides a message delivery method in a converged IP messaging (CPM) server.

The message delivery method includes determining whether to forward a message received from a source terminal; When determining to forward the message, determining whether to store the message on a message storage server based on user settings or policies; Requesting the message storage server to store the message when storing the message; Receiving a response message including information on the stored message from the message storage server; Checking whether there is at least one terminal among terminals of a receiver capable of receiving a message from the source terminal based on the user setting or policy; The method may include transmitting a message including the information to at least one terminal of the receiver according to a result of the checking.

The method may further include determining whether to delay the message, interwork the message, redirect the message to another terminal, or store in the storage server based on the user setting.

The method may further include whether to defer or interwork the message according to an operator policy when the message delivery to the target terminal fails for some reason even if the user setting is a delivery to the target terminal. .

The method may further include determining whether to reject the message based on information in the message from the source terminal.

The information makes it possible to distinguish the message within the message storage server. The information may be a unique identifier (UID) for the message.

The CPM server may be located in the home network of the target terminal.

The method includes checking whether a message from a source terminal is in CPM Large mode; In the CPM Large mode, the method may further include waiting from the source terminal (until the reception of the current message is completed).

The method includes receiving a response message from the target terminal; The method may further include transmitting a response message from the target terminal to a CPM server located in the home network of the source terminal.

When there are a plurality of target terminals, when a first response message is received among the response messages from the plurality of target terminals in the transmitting of the response message, the first response message is located in the home network of the source terminal. The transmission may be to a CPM server.

On the other hand, in order to achieve the above object, the present disclosure provides a message delivery method in a Converged IP Messaging (CPM) server. The delivery method includes the steps of identifying registered target terminals capable of receiving a message from a source terminal based on a user setting; Determining whether to interwork and deliver a message from a source terminal to the identified target terminal based on the user setting or redirecting to another terminal; When determining to interwork or redirect the message, determining whether to store the message in a message storage server based on the user setting; Requesting the message storage server to store the message when storing the message; Receiving a response message including information on the stored message from the message storage server; Including the information in the message may include interworking and transmitting to the target terminal or redirecting to the other terminal.

The present invention ensures that a message is not duplicated in a synchronization process between a terminal supporting a CPM service and a message storage server. Accordingly, the present invention enables efficient use of network resources by avoiding duplicate transmission and reception of messages and storage. In addition, the present invention enables the memory in the terminal to be used efficiently by preventing the message from being duplicated.

1 is a block diagram showing the configuration of a network and a terminal for a CPM service.
2 is an exemplary diagram illustrating a process of transmitting and receiving a CPM message.
3 is a flowchart illustrating an operation of a message storage server illustrated in FIG. 1 and a synchronization process of a message.
4 is a flowchart illustrating an exemplary embodiment of the present invention.
5 is a flowchart exemplarily illustrating a second embodiment of the present invention.
6 is a flowchart exemplarily illustrating a third embodiment of the present invention.
7 is a flowchart exemplarily illustrating a fourth embodiment of the present invention.
8 is an exemplary flowchart illustrating a fifth embodiment of the present invention.
9 is a flowchart illustrating a sixth embodiment of the present invention.
10 is a flowchart showing the operation of the CPM PF server.
11 is a block diagram illustrating a CPM PF server according to the present invention.
12 is a flowchart exemplarily showing a ninth embodiment of the present invention.
13 is a flowchart exemplarily illustrating a tenth embodiment of the present invention.
14 is a flowchart showing the operation of the CPM PF server.
15 is a block diagram of a CPM PF server according to the present invention.

The present invention is applied to the CPM message service. However, the present invention is not limited thereto, and may be applied to all message services, for example, SMS, EMS, and MMS, to which the technical spirit of the present invention may be applied.

It is to be noted that the technical terms used herein are merely used to describe particular embodiments, and are not intended to limit the present invention. It is also to be understood that the technical terms used herein are to be interpreted in a sense generally understood by a person skilled in the art to which the present invention belongs, Should not be construed to mean, or be interpreted in an excessively reduced sense. In addition, when the technical terms used herein are incorrect technical terms that do not accurately express the spirit of the present invention, they should be replaced with technical terms that can be understood correctly by those skilled in the art. In addition, the general terms used in the present invention should be interpreted as defined in the dictionary or according to the context before and after, and should not be interpreted in an excessively reduced sense.

Also, the singular forms "as used herein include plural referents unless the context clearly dictates otherwise. In the present application, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the various components, or various steps described in the specification, wherein some of the components or some of the steps It should be construed that it may not be included or may further include additional components or steps.

In addition, terms including ordinal numbers, such as first and second, as used herein may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or similar components will be given the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. In addition, in describing the present invention, when it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, it should be noted that the accompanying drawings are only for easily understanding the spirit of the present invention and should not be construed as limiting the spirit of the present invention by the accompanying drawings. The spirit of the present invention should be construed to extend to all changes, equivalents, and substitutes in addition to the accompanying drawings.

Terminology

Converged IP Messaging (CPM): Converted IP Messaging Service

CPM Client: A client software program capable of sending and receiving CPM messages, as shown in FIG.

Message storage client: As shown in Fig. 1 stores the message to be transmitted and received, and performs synchronization with the message storage server.

CPM Participating Function Server (CPM Participating Function Server): As shown in FIG. 1, it is responsible for delivering a message to the CPM client. In addition, as shown in FIG. 1, it is responsible for delivering a message to the message storage server 60. In addition, as shown in Figure 1, it is responsible for receiving the converted message from the interworking function unit (71).

Message storage server: As shown in FIG. 1, a message received from a CPM PF server is stored and synchronized with the message storage client 11.

Interworking Selection Function (Interworking Selection Function): It is responsible for determining whether to perform the interworking function.

Interworking Function (Interworking Function): Converts the CPM message into SMS, MMS, etc., or converts the SMS, MMS, etc. into a CPM message.

IMAP (Internet Messaging Access Protocol): A communication protocol for reading mail on an Internet mail server.

CPM Large Message Mode: A mode that sends a large size CPM message using the Message Session Relay Protocol (MSRP).

CPM Pager Mode: This mode sends and receives CPM messages of limited size without establishing an MSRP session.

CPM session: interaction between two or more participants for the exchange of CPM messages / continuous media

Hereinafter, although a terminal is illustrated in FIGS. 4 to 9, the terminal may be referred to as a user equipment (UE), a mobile equipment (ME), or a mobile station (MS). The terminal may be a portable device having a communication function, such as a mobile phone, a PDA, a smart phone, a notebook computer, or a non-portable device such as a PC or a vehicle-mounted device.

4 is a flowchart illustrating an exemplary embodiment of the present invention.

4 shows the CPM Page Mode, and when the terminal B1 of the user B receives the CPM message, duplicate reception and storage are prevented.

4 shows user A's terminal A1 100A, user B's terminal B1 100B, user A's home network, user B's home network, and message storage server 600. The user A's home network includes a SIP / IP network 500A and a CPM PF server 810A. The user B's home network includes a SIP / IP network 500B and a CPM PF server 810B.

4 shows the procedure for transmitting the CPM message by the user A's terminal A1 (100A) (S120), the procedure for delivering the CPM messages to the CPM PF server in the user's home network (S140), and checking the user preferences (User Preference). And CPM message storage procedures (S150), CPM message delivery procedures (S170) of user B to terminal B1, response message transmission procedures (S180) for CPM message, and synchronization procedures (S190) are shown.

1) First, a procedure (S120) of transmitting a CPM message by UE A1 100A of user A will be described.

The terminal A1 100 transmits a CPM message to the CPM PF server 810A through the SIP / IP network 500A according to the request of the user A (S121 and S122).

In this case, when the size of the CPM message is 1300 bytes or less, the CPM message is encapsulated in SIP MESSAGE and transmitted. The CPM message includes a CPM Feature tag indicating that it is a CPM message.

Although not shown, when the message transmitted by the terminal A1 100 is a message other than a CPM message (for example, SMS, MMS or email), the message of another type is converted into a CPM message. Via the interworking function of the working server. If the converted CPM message does not exceed 1300 bytes, the interworking function transmits the CPM message according to the CPM Pager Mode. If more than 1300 bytes, the interworking function sends a message according to the CPM Large Message Mode.

2) Next, the CPM message delivery procedure (S140) to the CPM PF server in the user B's home network will be described.

When the CPM PF server 810A in the user A's home network receives the CPM message, the SIP / IP network 500A in the user A's home network and the SIP / IP network 500B in the user B's home network Through the CPM message to the CPM PF server 810B in the home network of the user B (S141, S142, S143).

3) Next, a user preference confirmation and a CPM message storage procedure S150 will be described.

When the CPM PF server 810B in the home network of the user B receives the CPM message, the CPM PF server 810B confirms the user setting (or user preference) of the user B (S151).

(a) First, the CPM PF server 810B in the user B's home network determines whether to reject the CPM message. That is, the CPM PF server 810B checks whether the CPM address of the authenticated sender in the received CPM message should be rejected according to an access policy. To this end, the CPM PF server 810B, for example, checks the following access policy for the received message. The confirmation may include: i) confirmation of the feature tag, ii) confirmation of the pager mode message, iii) confirmation of the caller's condition (e.g. confirmation of the sender's identity (eg phone number or e-mail address)), iv) acceptance Includes whether to check.

 For example, the feature tag will be described. The CPM PF server 810B evaluates a <service-list> element and a <service> element in which a feature tag value is set, so that a <conditons> element is defined for the CPM service. CPM PF server Check for rules where the <conditions> element evaluates to true for the CPM service by evaluating the <service-list> elements and <service> elements with the attribute “Feature tag” the value).

For example, the pager mode message will be described. The CPM PF server 810B checks whether the <media-list> element <condition> is set to true for the CPM media pager-mode message.

 In the example of the condition of the calling user, the CPM PF server 800B checks whether the sender of the CPM message is set to true in a <conditions> element (for example, the sender's identity (eg This could be a phone number or an e-mail address.)

For example, the CPM PF server 810B checks whether the CPM media pager mode message having a true value in the <allow-reject-invite> action element is true (The CPM PF). Server Check for rules that evaluates to true for the CPM media pager mode message with the value “true” in the <allow-reject-invite> action element). If the rule is found to be true, the received CPM message is rejected. The acceptance check is performed when i), ii) and iii) are present. If i), ii), and iii) do not exist, proceed to (b) or (c) below. (If such rules (ie, i, ii, iii) exist, CPM PF continues to evaluate the rules in the next step)

(b) Next, when the CPM message is an anonymous message, the CPM PF server 810B identifies an element related to the anonymous message in accordance with the user preference or service provider policy. If an anonymous message is not supported, the received message is not sent to the user and an error message is sent to the sender.

(c) Next, the CPM PF server 810B checks whether the supported message size is satisfied according to the service provider policy and whether the content of the message is satisfied. If not satisfied, reject the received message.

(d) When the Expire header is included in the received message, the CPM PF server 810B determines the expiry based on the header value. If the received message is expiry, reject the received message.

Steps (a), (b), (c), and (d) described above may be reversed.

As described above, when it is determined that the message is received by the CPM PF server, a receivable terminal inquiry process is performed. To this end, the CPM PF server 810B checks a user preference for message delivery (S151a), and searches for terminals registered (ie, accessed) of the user B. In addition, the CPM PF server 810B may receive a message by checking the user setting (ie, per-device user preference), device capability, device connectivity, service provider policy, etc. for each of the searched terminals. Check whether there is a terminal.

On the other hand, the CPM PF server 810B next checks the user preferences when there is no terminal that can be received, whether to defer the message, or notify the user of the delay message after the delay, It determines whether to interwork, redirect to another terminal, or store. Alternatively, if there is a terminal that can receive the CPM PF server 810B, it determines whether to store and forward the message.

At this time, if determined as the delay, the CPM PF server 810B does not transmit the CPM message, but stores (for example, temporarily stores) the CPM message. If it is determined that the interworking, the CPM PF server 810B delivers the CPM message to the interworking selection function of the interworking server 700B, and the interworking selection function changes the CPM message to a message of any type. Decide if you want to. In this case, the policy of the service provider, the user preference of the terminal B1 100B, or the characteristics of the CPM message may be considered in the determination. The interworking selection function requests the interworking function for conversion to the determined type, and the interworking function converts the CPM message to the determined type.

On the other hand, the order of confirmation of the user setting may be changed as follows. For example, when the CPM PF server 810B receives the CPM message, the CPM PF server 810B checks a general user preference that is commonly applied to all terminals, that is, confirms a <action> element. Thus, it may be determined whether to defer the received CPM message, to notify the user after the delay of the received CPM message, to interworking, to store or to redirect. If the general user setting does not correspond to any of the above values, it may be determined that the CPM PF server delivers. And, if it is determined that the delivery (deliver) according to the determination, the CPM PF server 810B is a terminal registered (ie, connected) of the user B to select a receivable terminal for message delivery (message delivery) And a terminal capable of receiving a message by checking at least one of user settings (ie, per-device user preference profile), device capability, device connectivity, and service provider policy for each of the discovered terminals. (The CPM Participating Function SHALL check the user preference profile for the registered devices to determine which CPM Clients). Meanwhile, when the CPM PF server 810B decides to deliver or interwork a message in the step, an element related to message recording in a user preference (eg, user preference for recording CPM). Conversation History) is set to a value that means storage, such as true or active (S151b).

If it is determined to store and store both the message (ie, record) and delivery through the confirmation of the user setting (or user preference) as described above, the CPM PF server 810B sends the CPM message to the message. The storage server 600 transmits the data (S152). In this case, the CPM PF server 810B transfers the CPM message to the message storage server 600 using an IMAP command.

The message storage server 600 stores the CPM message (S153), and identifies information on the CPM message stored in the storage server 600 (for example, the plurality of messages stored in the storage server 600). A response message including an identifier, UID (Unique Identifier), which enables the transmission, is transmitted to the CPM PF server 810B (S154). The identifier or UID may be generated according to RFC3501.

4) Next, the CPM message delivery procedure (S170) of the user B to the terminal B1 as follows.

The CPM PF server 810B includes information about the CPM message from the message storage server 600 (for example, an identifier, a UID, which distinguishes the message among a plurality of messages stored in the storage server 600). In response to receiving the response message, the information is extracted from the response message, and the extracted information is included in the CPM message. The CPM message including the information is transmitted to the terminal B1 100B of the user B through the SIP / IP network 500B (S171. S172).

For the transmission, the CPM PF server 810B undergoes the following process.

The CPM PF server 810B transmits the message by combining user preferences, device connectivity, device capability, service provider policy, and the like, which are checked in step S151a. Select the terminal. In this case, the user setting of each terminal may be different in consideration of characteristics of the terminal. For example, if the terminal 1 is a PC at home, the terminal 2 is a phone received from the company, there may be a setting for receiving all company-related messages only in the terminal 2, and the device connectivity (Device connectivity) Indicates whether it is registered in the CPM network. The device capability indicates whether the terminal is capable of receiving a message.

The CPM PF server 810B duplicates the CPM message for each terminal when there are a plurality of terminals that can be received. And the address (i.e. GRUU) of each terminal in the reception address of the copied CPM message (ie, the reception address becomes a form in which the address of the receiver is combined with the address of the terminal). The address of each terminal is a value generated when each terminal registers with the SIP / IP core network. The CPM PF server may be obtained by subscribing to the SIP / IP core network. The CPM PF server includes the file identifier obtained in step S154 of FIG. 4 in the CPM message. The information may be included in the body of the CPM message or may be included in a header part. Upon receiving the CPM message, the terminal B1 100B extracts the information in the CPM message and stores the CPM message and the information (S173).

5) Next, the response message transmission procedure (S180) for the CPM message will be described. The terminal B1 100B transmits a response message to the CPM message, for example, a SIP-based 200 OK message, to the CPM PF server 810B through the SIP / IP network 500B.

If the CPM PF server 810B fails to deliver the message to the target terminal, the CPM PF server 810B defers the failed message and notifies the user of the delayed message or interworking according to an operator policy. You can choose. In this case, the CPM PF server 810B may delete the CPM message stored in the message storage server.

The CPM PF server 810B sends the response message to the CPM PF server 810A via the SIP / IP networks 500B and 500A.

In this case, when there are a plurality of terminals of the user B, when the first response message among the response messages from the plurality of terminals is received, the first response message is transmitted to the CPM PF server 810A.

When the CPM PF server 810A receives the response message, the CPM PF server 810A transfers the response message to the terminal A1 (100A) of the user A.

6) Finally, the synchronization procedure (S190) will be described as follows.

The terminal B1 100B transmits a synchronization request message to the message storage server 600 in order to synchronize with the message storage server 600 (S191).

Then, the message storage server 600 may store information on its stored messages (for example, information on all stored messages or information on the most recently stored message) (ie, all stored data). Identifiers of messages or identifiers for the most recently stored message) are transmitted to the terminal B1 (100B) (S192).

Then, the terminal B1 100B checks whether there is an unreceived message on the basis of the received information (S193), and checks whether there is an unsent message (S194). For example, assume that the identifier for the CPM message stored in step S153 is 4, and assume that the terminal B1 100B receives the CPM message including the identifier 4 in step S172. In addition, assuming that the message storage server 600 transmits the identifier 4 for the most recently stored CPM message to the terminal B1 (100B) in step S192, the terminal B1 (100B) has an identifier 4 of its own. By comparing the received identifier 4, it is determined that no message has been received. In addition, the terminal B1 (100B) determines that it does not have a message that is not transmitted by comparing the identifier 4 and the received identifier 4 it owns.

As described above, according to the first embodiment of the present invention, the terminal B1 (100B) does not receive the message redundantly, so that the network resources can be used efficiently and the memory can be used efficiently.

5 is a flowchart exemplarily illustrating a second embodiment of the present invention.

5 shows transmission and reception of a CPM Large Mode message, and shows that duplicate reception and storage are prevented when the terminal B1 of the user B receives the CPM message.

5 shows a session establishment process by the user A's terminal A1 (100A) (S210), a procedure for transmitting a CPM Large Mode message by the user's terminal A1 (100A) (S220), and a user's B CPM PF server in the home network. CPM Large Mode message delivery procedure (S240), user preferences (User Preference) confirmation and CPM Large Mode message storage procedure (S250), CPM Large Mode message delivery procedure (S270), the synchronization procedure ( S290) is shown. Although not shown in FIG. 5, similar to FIG. 4, a response message transmission procedure for a CPM Large Mode message is performed between the forwarding procedure S270 and the synchronization procedure S290. In the process of transmitting the response message to the CPM Large Mode message, the contents of FIG. 4 will apply mutatis mutandis.

In addition, only contents that are different from the procedures of FIG. 4 will be described below, and description of similar procedures will apply mutatis mutandis to FIG. 4.

1) First, a session establishment procedure (S210) by the terminal A1 (100A) of the user A as follows.

When the user A requests to send a message larger than 1300 bytes, for example, the terminal A1 100 first transmits a session invitation message, for example, a SIP-based INVITE message, to the SIP in the user A's home network. It transmits to the CPM PF server 810A via the / IP network 500A.

When the CPM PF server 810A in the user A's home network receives the session invitation message, the SIP / IP network 500A in the user A's home network and the SIP / IP network 500B in the user B's home network ), The session invitation message is delivered to the CPM PF server 810B in the user B's home network.

When the CPM PF server 810B in the user B's home network receives the session invitation message, it determines (a) whether to reject the CPM message. That is, the CPM PF server 810B checks whether the CPM address of the authenticated sender in the received session invitation message should be rejected according to an access policy. To this end, the CPM PF server 810B checks the following access policy for the received session invitation message, for example. The confirmation may include i) confirmation of feature tag, ii) confirmation of large mode message, iii) confirmation of originating user's condition (e.g. confirmation of sender's identity (eg phone number or e-mail address)), iv) acceptance Includes whether to check. At this time, when checking the feature tag, the CPM PF server 810B checks whether the feature tag indicates a large mode message (Upon receiving a SIP INVITE request with the CPM Feature Tag '3gpp-service.ims.icsi. oma.cpm.largemsg 'corresponding to Large Message Mode CPM Message, the CPM Participating Function SHALL execute the following).

(b) Next, when the session invitation message is an anonymous message, the CPM PF server 810B identifies an element related to the anonymous message in accordance with the user preference or service provider policy.

(c) Next, the CPM PF server 810B checks whether the supported message size is satisfied according to the service provider policy and whether the content of the message is satisfied. If not satisfied, reject the received message.

(d) When the Expire header is included in the received message, the CPM PF server 810B determines the expiry based on the header value. If the received message is expiry, reject the received message.

(e) The CPM PF server 810B may determine a user preference related to the size of the received message. Specifically, check the max-size attribute value of the ‘Large-Message’ element of <Media-List> in the user preferences.

The order of the steps (a), (b), (c), (d), and (e) may be changed, and details thereof are similar to those described above, and thus will not be described in detail.

If it is determined through the steps (a), (b), (c), (d), and (e) that the message is received without being rejected by the CPM PF server, a terminal inquiry process that can be received is performed. do. To this end, the CPM PF server 810B checks a user preference for message delivery, and searches for the registered (ie, accessed) terminals of the user B. In addition, the CPM PF server 810B may receive a message by checking the user setting (ie, per-device user preference), device capability, device connectivity, service provider policy, etc. for each of the searched terminals. Check whether there is a terminal.

On the other hand, the CPM PF server 810B next checks the user preferences when there is no terminal that can be received, whether to defer the message, or notify the user of the delay message after the delay, It determines whether to interwork, redirect to another terminal, or store.

If it is determined to deliver the message, the CPM PF server 810B transmits the session invitation message to the terminal B1 100B through the SIP / IP network 500B.

If the user B accepts the session setup, the terminal B1 100B transmits a response message, for example, a SIP-based 200OK message, to the CPM PF server 810B through the SIP / IP network 500B.

Upon receiving the response message, the CPM PF server 810B prepares to receive an MSRP message. The CPM PF server 810B is connected to the CPM PF server in the user A's home network through the SIP / IP network 500A in the user A's home network and the SIP / IP network 500B in the user B's home network. Send to 810A.

Upon receiving the response message, the CPM PF server 810A prepares to receive an MSRP message. The CPM PF server 810A transmits the response message to the terminal A1 100A through the SIP / IP network 500A.

2) Next, a procedure S220 of transmitting a CPM Large Mode message by UE A1 100A of user A is performed. The procedure of S220 is as follows.

When the terminal A1 100 receives a message body having a size greater than 1300 bytes from the user A, the terminal A1 100 generates a CPM Large Mode message, and encapsulates the generated CPM Large Mode message into an MSRP-based message. The IP network 500 transmits the CPM PF server 810A through the network A (S221 and S222).

3) Next, the CPM Large Mode message delivery procedure (S240) to the CPM PF server in the user B's home network is performed. Since the delivery procedure (S240) is similar to the S140 process of FIG. I shall apply mutatis mutandis.

4) Also, a user preference check and a CPM Large Mode message storage procedure S250 are performed.

When the CPM PF server 810B decides to deliver or interwork a message as described above, an element related to message recording in a user preference (for example, user preference for recording CPM). Conversation History) is set to a value that means storage, such as true or active (S251).

In this case, the checking of the element related to the message recording may be performed when the session invitation message is received.

If it is determined to store both the message (store, that is, record) and delivery as described above, the CPM PF server 810B transmits the CPM message to the message storage server 600 (S252). In this case, the CPM PF server 810B transfers the CPM message to the message storage server 600 using an IMAP command.

In addition, since the detailed procedure of S250 is similar to the procedure of S150 of FIG. 4, the description of S150 will apply mutatis mutandis.

5) Next, the CPM Large Mode message transfer procedure (S270) of the user B to the terminal B1 is performed.

The CPM PF server 810B includes information about the CPM message from the message storage server 600 (for example, an identifier, a UID, which distinguishes the message among a plurality of messages stored in the storage server 600). Upon receiving the response message, the information is extracted from the response message, and the extracted information is included in the MSRP message. The MSRP including the information is transmitted to the terminal B1 (100B) of the user B through the SIP / IP network 500B (S271. S272). The information may be included in the body of the CPM message or may be included in a header part.

Table 1 below shows an example of the configuration of the MSRP message including the information. The information may be included in the body or may be included in the header portion as shown in Table 1 below.

MSRP d93kswow SEND
To-Path: msrp: //bobpc.example.com: 888 / 94di4eeewzd; tcp
From-Path: msrp: //alicepc.example.com: 7654 / iau39soe2843; tcp
Message-ID: 12339sdqwer
Byte-Range: 1-137/148
Content-Type: message / cpim

To: Bob sip: bob@example.com
From: Alice sip: alice@example.com
DateTime: 2006-05-15T15: 02: 31-03: 00
Content-Type: text /; lain
NS: cpm <urn: oma: params: cpm>
Cpm.message-uid: 4827313
ABCD
----- d93kswow +

On the other hand, when it is determined to store the message by the element related to the message recording, the CPM PF server 810B waits until the reception of MSRP SEND chunks is completed, and then transmits the message.

6) Meanwhile, although not shown in FIG. 5, similar to FIG. 4, a response message transmission procedure for a CPM Large Mode message is performed between the forwarding procedure S270 and the synchronization procedure S290. In the process of transmitting the response message to the CPM Large Mode message, the contents of FIG. 4 will apply mutatis mutandis. As such, when the terminal A1 100A of the user A receives the response message, in order to terminate the established session, a session termination message, for example, a SIP-based BYE message is transmitted. The BYE message reaches the user B's terminal B1 100B via the SIP / IP networks 500A and 500B.

7) Next, the synchronization process (S290) procedure is performed. Since the synchronization process S290 is similar to the process S190 of FIG. 4, the description of the procedure S190 will apply mutatis mutandis.

As described above, according to the first embodiment of the present invention, the terminal B1 (100B) does not receive the message redundantly, so that the network resources can be used efficiently and the memory can be used efficiently.

6 is a flowchart exemplarily illustrating a third embodiment of the present invention.

6 illustrates an example of a CPM Page Mode, and illustrates a situation in which a CPM message transmitted by UE A1 of user A is stored in a message storage server. In this situation, the third embodiment shows an example in which the terminal A1 prevents the terminal A1 from receiving the CPM message transmitted by the terminal A1 again.

6 shows procedures for transmitting CPM messages by terminal A1 (100A) of user A, user preference confirmation and CPM message storage procedures in CPM PF server 810A in user A's home network. S330, CPM message delivery procedures (S340) to the CPM PF server in the user B's home network, CPM message delivery procedures (S370) to the terminal B1 of the user B, response message transmission procedures (S380) for the CPM message ) Is shown.

1) First, a CPM message transmission procedure (S320) by UE A1 100A of user A is performed. Since the process S320 is similar to the process S120 of FIG. 4, the description of the process S120 will apply mutatis mutandis.

2) Next, a user preference confirmation and CPM message storing procedures S330 are performed at the CPM PF server 810A in the user A's home network.

Specifically, when the message from the terminal A1 (100A) is received by the CPM PF server 810A, the CPM PF server 810A is a legitimate user that user A of the terminal A1 (100A) can transmit the message. Check if it is.

If the CPM message is an anonymous message, the CPM PF server 810A confirms whether to reject the anonymous message.

In addition, the CPM PF server 810A confirms a user setting (or user preference) of the user A (S331). That is, the CPM PF server 810A checks an element (eg, user preference for recording CPM Conversation History) related to message recording in a user preference, and determines whether to store and forward the message.

If it is determined that the message is stored and then delivered, the CPM PF server 810A transmits the CPM message to the message storage server 600 (S332). In this case, the CPM PF server 810A delivers the CPM message to the message storage server 600 using an IMAP command.

The message storage server 600 stores the CPM message (S333), and identifies information about the CPM message stored in the storage server 600 (for example, the plurality of messages stored in the storage server 600). In response to the response message including the identifier, the UID, which is enabled, the CPM PF server 810A is transmitted (S334). The identifier or UID may be generated according to RFC3501.

3) Next, CPM message delivery procedures S340 to the CPM PF server in user B's home network are performed. Since the procedure S340 is similar to the procedure S140 of FIG. 4, the description of the procedure S140 will apply mutatis mutandis.

4) Next, CPM message delivery procedures S370 of the user B to the terminal B1 are performed. Since the procedure S370 is similar to the procedure S170 of FIG. 4, the description of the procedure S170 will apply mutatis mutandis.

5) Next, response message transmission procedures S380 for the CPM message are performed.

Since the procedure S380 is similar to the procedure S180 of FIG. 4, the description of the procedure S180 is applied mutatis mutandis, and only the content of discrimination will be described. When the CPM PF server 810A in the user A's home network receives the response message, the CPM PF server 810A includes the information on the message received in step S334 in the response message and transmits the response message to the terminal A1 100A.

Then, the terminal A1 100A stores the CPM message transmitted by the terminal A1 and the information on the message (for example, identification information and UID) together.

Therefore, even when the synchronization with the message storage server 600, the terminal A1 (100A) does not receive a message transmitted by itself from the message storage server 600.

7 is a flowchart exemplarily illustrating a fourth embodiment of the present invention.

7 illustrates an example of transmitting and receiving a CPM Large Mode message, and illustrates a situation in which a CPM message transmitted by UE A1 100A of user A is stored in a message storage server. In this situation, the fourth embodiment shows an example in which the terminal A1 prevents the terminal A1 from receiving the CPM Large Mode message transmitted by itself in synchronization.

The fourth embodiment shown in FIG. 7 is easily understood by those skilled in the art from the descriptions of the second embodiment and the third embodiment and will not be redundantly described.

In the above-described first to fourth embodiments, the message is transmitted and stored in the message storage server, and thus the message is not duplicated when the synchronization process is performed.

However, in CPM Conversation, not only the CPM message but also the CPM session exists. Hereinafter, it is proposed to store the CPM session in the message storage server. In the storage of the CPM session, a control signal for the session, for example, a SIP-based INVITE message and a SIP-based BYE message, may also be stored in the message storage server 600.

8 is an exemplary flowchart illustrating a fifth embodiment of the present invention.

FIG. 8 illustrates a situation in which a session control (invitation and / or end) message and a general message transmitted from user A's terminal A1 (100A) are stored in a message storage server.

As can be seen with reference to FIG. 8, when the message storage server 600 stores the session control message or the general message transmitted by the terminal A1 100A of the user A, the information on the control message or the general message is stored. Send a response message including a to the CPM PF server.

In FIG. 8, some components (SIP / IP network, etc.) are omitted for convenience of description. The operation of the omitted components can be easily understood by those skilled in the art with reference to FIGS. 4 to 7.

8 will be described in detail.

1) First, user A's terminal A1 (100A) transmits a session invitation message, for example, a SIP-based INVITE message, to create a CPM session.

2) Then, the CPM PF server 810A identifies an element related to storage, such as an element related to CPM Conversation history, with reference to the user preference (eg, user preference) for User A.

3-4) The CPM PF server 810A transmits a session invitation message to the terminal B1 100B of the user B, and the terminal B1 100B transmits a response message, for example, a SIP-based 200 OK message. do.

5) The CPM PF server 810A requests to save the session invitation message to the message storage server 600 when the CPM PF server 810A needs to store the data according to the confirmation of the user setting.

6) The message storage server 600 transmits a response message to the session invitation message to the CPM PF server 810A. In this case, the message storage server includes information (eg, identifier, UID) about the stored session invitation message in the response message.

7) The CPM PF server 810A transmits the response message including the information to the terminal A1 100A.

8 to 9) Meanwhile, the terminal A1 100A transmits a message to the CPM PF server 810A using the established session. Then, the CPM PF server 810A requests the message storage server 600 to store the message.

10) The message storage server 600 stores the message and transmits a response message to the CPM PF server 810A. In this case, the response message includes information on the stored message (eg, identification information, UID).

11 to 13) when the CPM PF server 810A receives the response message, the CPM PF server 810A transmits the message to the terminal B1 100B. When receiving the response message for the message from the terminal B1 (100B), the CPM PF server 810A includes the information received from the message storage server 600 in the response message, the terminal A1 (100A) To send.

14 to 18) Meanwhile, the terminal A1 100A transmits a session termination message, for example, a SIP-based BYE message, to the CPM PF server 810A to terminate the session. Then, the CPM PF server 810A requests the message storage server 600 to store the session end message as described above. The following procedure will not be described in detail as will be readily understood by those skilled in the art based on the drawings and the foregoing description.

9 is a flowchart illustrating a sixth embodiment of the present invention.

As can be seen with reference to FIG. 9, according to the sixth embodiment, the procedure for storing the CPM message and the procedure for delivering the CPM message to the terminal B1 of the user B may be changed in a different manner from those of FIGS. 4 to 8.

That is, the CPM PF server 810B may transmit the CPM message to the user terminal B1 100B and then request to store the CPM message to the storage server 600.

When receiving a response message including information on the message (for example, identification information or UID) from the storage server 600, the terminal receives a notification message including the information, for example, a notification message or a SIP-based NOTIFY message. Transmit to B1 (100B).

Alternatively, the storage server 600 may directly transmit a notification message including the information to the terminal B1 100B.

Meanwhile, although FIG. 9 shows that the confirmation of the user preference for storing is performed before transmitting the message to the terminal B1 100B, the confirmation is performed by transmitting the message to the terminal B1 100B. It may be performed later. Alternatively, the confirmation may be performed after receiving a response message, for example, an OK message, from the terminal B1 100B.

As described above, the sixth embodiment illustrated in FIG. 9 may be easily understood by those skilled in the art from the description of the first to fifth embodiments, and thus, the above description will be made without detail.

10 is a flowchart exemplarily illustrating a seventh embodiment of the present invention.

The seventh embodiment shown in FIG. 10 shows an example of transmitting and receiving a CPM Large Mode message, and shows that the CPM Large Mode message is stored after the CPM Large Mode message is transmitted to the user B of the user B 100B. In addition, according to the seventh embodiment, the information on the message is included in the session termination message indicating the end of the session and transmitted to the terminal B1 (100B).

In FIG. 10, some components (SIP / IP network, etc.) are omitted for convenience of description. The operation of the omitted elements can be easily understood by those skilled in the art with reference to FIGS. 4 to 9.

10 will be described in detail.

1) First, user A's terminal A1 (100A) transmits a session invitation message, for example, a SIP-based INVITE message, to create a CPM session. The session invitation message reaches the CPM PF server 810B in the user B's home network via the CPM PF server 810A in the user A's home network. At this time, if the user A wants to send a group message, the session invitation message passes through the CPM CF server. The session invitation message includes a feature tag indicating that it is a CPM message. On the other hand, if the terminal A1 (100A) is a non-CPM client that does not support CPM (that is, only supports SMS, MMS, or e-mail), the CPM PF server 810 A is an interworking server Take part. That is, the interworking server converts the non-CPM message and delivers it to the CPM PF server 810B.

2) When the session invitation message is received, the CPM PF server 810B determines whether to reject. Specifically, the CPM PF server 810B checks the feature tag in the session invitation message, as described above. As described above, the CPM PF server 810B checks the value of the <allow-reject-invite> element of the user setting to determine whether reception of the message is allowed. The value of the <allow-reject-invite> element can be any number (for example, mail from aaa@spam.com is not received). Subsequently, the CPM PF server 810B checks whether the session invitation message is an anonymous message. If anonymous is not supported, the CPM PF server 810B rejects the session invitation message.

When the CPM PF server 810B decides to receive the session invitation message, the CPM PF server 810B confirms user setting for message delivery. In detail, the CPM PF server 810B checks a user preference for message handling. According to the general user preferences, it is selected whether to defer / interworking / store / deliver the session invitation message.

If it is determined that the transfer or interworking, the CPM PF server 810B checks the user settings of the registered one or more terminals of the user B, to determine whether there is a receivable terminal.

3) When the receivable terminal is determined as the terminal B1 100B, the CPM PF server 810B delivers the session invitation message to the terminal B1 100B.

4) In response to receiving the session invitation message, the terminal B1 100B transmits a response message, eg, a 200 OK message based on a SIP.

5) The CPM PF server 810B transmits the response message to the terminal A1 (100A) of the user A. The CPM PF server 810B prepares to receive an MSRP message from the terminal A 100A.

6) The terminal A1 100A transmits an MSRP message.

7) Upon receiving the MSRP message, the CPM PF server 810B confirms the user setting for storage. That is, the CPM PF server 810B checks the CPM Conversation history related option in the user setting stored in the XDM of the user B. Check if the user setting is set to save CPM Conversation history. This process may be performed after the user setting confirmation process for delivery, or may be performed before receiving the MSRP message.

On the other hand, when the CPM PF server 810B stores the CPM Conversation history, the CPM PF server 810B does not transmit the MSRP message to the terminal B1 100B until after reception of the MSRP SEND chunks.

9 to 10) When the CPM PF server 810B receives the MSRP SEND chunks, the CPM PF server 810B transmits an MSRP message to the terminal B1 100B. The CPM PF server 810B receives a response message, for example, 200 OK message, from the terminal B1 100B.

11) When the CPM PF server 810B receives the response message, the CPM PF server 810B decides to store the CPM Conversation history according to the user setting. Send the request.

12) The message storage server 600 stores the MSRP message, and transmits a storage request response message including information about the message (eg, UID) to the CPM PF server 810B as described above.

13) On the other hand, the terminal A1 (100A) was created to transmit the CPM Large Mode message. A termination message for terminating a SIP-based session, for example, a SIP-based BYE message, is transmitted to the CPM PF server 810B.

14) The CPM PF server 810B transmits a response message to the terminal A1 100A.

On the other hand, the CPM PF server 810B sends an end message including information on the stored message received from the message storage server 600, for example, a SIP-based BYE message, to the terminal B1 100B. send. In addition, the terminal B1 100B transmits a response message to the CPM PF server 810B.

On the other hand, if the message transmission fails for some reason, the CPM PF server 810B defers the transmission of the MSRP message. In addition, the CPM PF server 810B transmits a notification message for informing that the CPM PF server 810B has been postponed to the terminal B1 100B.

11 is a flowchart exemplarily illustrating a seventh embodiment of the present invention.

The eighth embodiment shown in FIG. 11 shows a CPM Page Mode, and when the terminal B1 receives the deferred CPM message after the CPM message to the user B of the user B is deferred, duplicate reception and It was shown that storage was prevented.

11 shows the procedure for transmitting the CPM message by the user A's terminal A1 (100A) (S520), the procedure for delivering the CPM messages to the CPM PF server in the user's home network (S540), and checking the user preferences (User Preference). And CPM message storage procedures (S550), response message transmission procedures (S580) for the CPM message.

1) First, a procedure (S520) of transmitting a CPM message by the terminal A1 (100A) of the user A is performed. Since the procedure S520 is similar to the procedure S120 of FIG. 4, the contents of the procedure S120 will be applied mutatis mutandis.

2) Next, CPM message delivery procedures S540 to the CPM PF server in User B's home network are performed. Since the S540 procedure is similar to the S140 procedure of FIG. 4, the contents of the S140 procedure will be applied mutatis mutandis.

3) Next, user preference confirmation and CPM message storage procedures S550 are performed.

When the CPM PF server 810B in the user B's home network receives the CPM message, the CPM PF server 810B checks the user preference (or user preference) of the user B (S551).

The confirmation process (S551) of the user setting (or user preference) is easily understood by those skilled in the art from the description of FIG. 4 and will not be described in detail.

On the other hand, if it is determined that there is no terminal that can receive, the CPM PF server 810B checks the General User Preference, whether to defer the message, interwork, or other It determines whether to redirect or store to the terminal.

At this time, if it is determined that the defer and store, the CPM PF server 810B transmits the CPM message to the message storage server 600 (S552). In this case, the CPM PF server 810B transfers the CPM message to the message storage server 600 using an IMAP command.

The message storage server 600 stores the CPM message (S553), and identifies information on the CPM message stored in the storage server 600 (for example, the plurality of messages stored in the storage server 600). A response message including an identifier, a UID (Unique Identifier) that enables the transmission, is transmitted to the CPM PF server 810B (S554). The identifier or UID may be generated according to RFC3501.

The CPM PF server 810B combines the information in the received response message with the CPM message and the information (S555). That is, the information is included in the CPM message.

Subsequently, the CPM PF server 810B temporarily stores the combined message and postpones the transmission (S556).

5) Next, a response message transmission procedure (S580) for the CPM message is performed. The CPM PF server 810B transmits a response message to the CPM message, for example, a SIP-based 200 OK message, to the CPM PF server 810A through the SIP / IP networks 500B and 500A.

When the CPM PF server 810A receives the response message, the CPM PF server 810A transfers the response message to the terminal A1 (100A) of the user A.

6) Meanwhile, the CPM PF server 810B processes the deferred CPM message according to the related setting. For example, when the user B requests the deferred CPM message, the user B transmits a CPM message including information about the message to the user B terminal. Therefore, the user B's terminal may not receive duplicate information when performing synchronization using the information on the message.

12 is a flowchart exemplarily showing a ninth embodiment of the present invention.

The ninth embodiment shown in FIG. 12 shows the CPM Page Mode, and when the CPM message is interworked and transmitted to the terminal B1 of the user B, duplicate reception and storage are prevented.

12 shows the procedure for transmitting the CPM message by the user A's terminal A1 (100A) (S620), the procedure for delivering the CPM messages to the CPM PF server in the user's home network (S640), and checking the user preferences (User Preference). And CPM message storage procedures (S650), interworking procedures (S660), and response message transmission procedures (S680).

1) First, a procedure (S620) of transmitting a CPM message by UE A1 (100A) of user A is performed. Since the procedure S620 is similar to the procedure S120 of FIG. 4, the contents of the procedure S120 will be applied mutatis mutandis.

2) Next, CPM message delivery procedures S640 to the CPM PF server in User B's home network are performed. Since the S640 procedure is similar to the S140 procedure of FIG. 4, the contents of the S140 procedure will be applied mutatis mutandis.

3) Next, user preference confirmation and CPM message storage procedures S650 are performed.

When the CPM PF server 810B in the user B's home network receives the CPM message, the CPM PF server 810B checks the user preference (or user preference) of the user B (S651).

The confirmation process (S551) of the user setting (or user preference) is easily understood by those skilled in the art from the description of FIG. 4 and will not be described in detail.

On the other hand, if it is determined that there is no terminal that can receive, the CPM PF server 810B checks the General User Preference, whether to defer the message, interwork, or other It determines whether to redirect or store to the terminal.

At this time, if it is determined that the interworking, the CPM PF server 810B checks the user settings again, and determines whether to save. That is, if it is determined that the interworking, there is a terminal that can be received, so check the user settings related to this.

An example of the interworking decision is that if there is no registered terminal of user B, if there is no CPM user with a valid SIP address (Non-CPM user with a valid SIP address), there is no CPM function in the control or end network. Missing CPM Support in the Controlling or Terminating Network, Missing SIP / IP Core support in the Controlling or Terminating Network, Recipient over SIP / IP Core Network Recipient not routable via SIP / IP Core network, when the media of the CPM message is not supported by the interworking server (Handling of Media not supported by Interworking Function).

As such, when it is determined that the store and interworking, the CPM PF server 810B transmits the CPM message to the message storage server 600 (S652).

In this case, the CPM PF server 810B transfers the CPM message to the message storage server 600 using an IMAP command.

The message storage server 600 stores the CPM message (S653), and identifies information about the CPM message stored in the storage server 600 (for example, the plurality of messages stored in the storage server 600). A response message including an identifier, a UID (Unique Identifier) that enables the transmission, is transmitted to the CPM PF server 810B (S654). The identifier or UID may be generated according to RFC3501.

The CPM PF server 810B combines the information in the received response message with the CPM message and the information (S655). That is, the information is included in the CPM message.

4) Next, an interworking procedure S660 is performed.

In detail, the CPM PF server 810B transmits the combined CPM message to the interworking server 700B (S661).

The interworking server 700B selects an appropriate interworking function (S662). The selection of the interworking function may be made based on the following criteria. For example, the criteria may include a non-CPM communication service identifier that accompanies the non-CPM user address, a service provider policy, a target user preference, a target. Target user's presence information, message characteristics (such as message size and content), session characteristics (such as media used for the session), and the like.

The interworking server 700B interworks the CPM message into a non-CPM message. That is, the information in the CPM message is mapped to the appropriate header of the non-CPM message. If there is no such suitable header, an extension header is generated.

The interworking server 700B transmits the non-CPM message to the terminal B1 200B (S663).

Then, the terminal B1 200B stores information on the message included in the non-CPM message. At this time, even if the storage for the CPM message and the storage for the non-CPM message is the same in the terminal B1 (200B), it can be prevented from being duplicated by using the information on the message in the future synchronization.

5) Next, a response message transmission procedure S680 is performed. The CPM PF server 810B transmits a response message to the CPM message, for example, a SIP-based 200 OK message, to the CPM PF server 810A through the SIP / IP networks 500B and 500A. When the CPM PF server 810A receives the response message, the CPM PF server 810A transfers the response message to the terminal A1 (100A) of the user A.

13 is a flowchart exemplarily illustrating a tenth embodiment of the present invention.

The tenth embodiment shown in FIG. 13 shows a CPM Page Mode, and shows that when a CPM message is interworked and transmitted to the terminal B1 of the user B, duplicate reception and storage are prevented.

13 shows the procedure for transmitting the CPM message by the user A's terminal A1 (100A) (S720), the procedure for delivering the CPM messages to the CPM PF server in the user's home network (S740), and confirms the user preference (User Preference). And CPM message storage procedures (S750), redirect procedures (S761) are shown.

1) First, a procedure (S720) of transmitting a CPM message by the terminal A1 (100A) of the user A is performed. Since the S720 procedure is similar to the S120 procedure of FIG. 4, the contents of the S120 procedure will be applied mutatis mutandis.

2) Next, CPM message delivery procedures S740 to the CPM PF server in User B's home network are performed. Since the procedure S740 is similar to the procedure S140 of FIG. 4, the contents of the procedure S140 will be applied mutatis mutandis.

3) Next, user preference confirmation and CPM message storage procedures S750 are performed.

When the CPM PF server 810B in the user B's home network receives the CPM message, the CPM PF server 810B checks the user preference of the user B (S751).

The confirmation process (S551) of the user setting (or user preference) is easily understood by those skilled in the art from the description of FIG. 4 and will not be described in detail.

If it is determined that there is no terminal that can be received, the CPM PF server 810B checks the General User Preference to defer the message, interwork, or to another terminal. Determines whether to redirect or store.

At this time, if it is determined that the redirect, the CPM PF server 810B checks the user settings again, and determines whether to save. That is, if it is determined that the redirect is a case where there is a terminal that can be received, the user setting related thereto is checked again.

In this way, if it is determined that the store (Store) and the redirect, the CPM PF server 810B transmits the CPM message to the message storage server 600 (S752).

In this case, the CPM PF server 810B transfers the CPM message to the message storage server 600 using an IMAP command.

The message storage server 600 stores the CPM message (S753), and identifies information about the CPM message stored in the storage server 600 (for example, the plurality of messages stored in the storage server 600). A response message including an identifier, UID (Unique Identifier), which enables the transmission, is transmitted to the CPM PF server 810B (S754). The identifier or UID may be generated according to RFC3501.

The CPM PF server 810B combines the information in the received response message with the CPM message and the information (S755). That is, the information is included in the CPM message.

4) Next, the CPM PF server 810B redirects the combined CPM message to the other terminal of the user B (S761). In this case, the other terminal prevents duplicate storage when performing synchronization using the information on the message.

14 is a flowchart showing the operation of the CPM PF server.

As can be seen with reference to FIG. 14, when the CPM PF server 810 receives a message from a source terminal (S811), a registered target terminal capable of receiving a message from the source terminal based on a user setting. Check whether they exist (S812).

If it is determined that the registered terminals exist, the CPM PF server 810 determines whether to transmit a message from a source terminal to the identified target terminal based on the user setting (S813).

When determining to deliver the message, the CPM PF server 810 determines whether to store the message in the message storage server based on the user setting (S814).

When storing the message, the CPM PF server 810 requests the message storage server 600 to store the message (S815), and sends a response message including information on the stored message from the message storage server. Receive (S816).

Then, the CPM PF server 810 includes the information in the message and transmits the information to the target terminal (S817).

The method according to the invention described thus far can be implemented in software, hardware, or a combination thereof. For example, the method according to the present invention may be stored in a storage medium (eg, internal memory, flash memory, hard disk, etc.), and may be a microprocessor, controller, microcontroller, application specific integrated circuit (ASIC). It may be implemented as codes or instructions in a software program that can be executed by a processor such as. This will be described with reference to FIG. 11.

15 is a block diagram of a CPM PF server according to the present invention.

As shown in FIG. 15, the CPM PF server 810 includes a storage unit 811, a controller 812, and a transceiver 813.

The storage means 811 stores a software program in which the method shown in FIGS. 4 to 14 is implemented.

The controller 812 controls the storage means 811 and the transceiver 813, respectively. Specifically, the controller 812 executes the methods stored in the storage means, respectively. The controller 813 transmits the aforementioned signals through the transceivers.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, May be modified, modified, or improved.

100A: terminal A1 of user A
100B: terminal B1 of user B
500A: SIP / IP network in user A's home network
500B: SIP / IP network in user B's home network
600: message storage server
700B: Interworking Server in User B's Home Network
810A: CPM PF Server in User A's Home Network
810B: CPM PF Server in User B's Home Network

Claims (25)

Message transmission method performed by a Converged IP Messaging (CPM) server.
Determining whether to send a message received from a source terminal;
When determining to send the message, determining whether to store the message on a message storage server based on user settings or policies;
Requesting the message storage server to store the message if it is determined that the message is stored at the message storage server;
Obtaining information on the stored message from the message storage server;
Checking whether there is at least one terminal among terminals of a receiver capable of receiving a message from the source terminal based on the user setting or policy;
Transmitting a message including the information to at least one of the terminals of the receiver according to the confirmation result;
And the information is used for a synchronization procedure. The method of claim 1,
When there is no one or more terminals that can receive a message from the source terminal among the terminals of the receiver according to the check result,
And determining whether to delay the message, interwork the message, or redirect the message to another terminal based on the user setting. The method of claim 1,
And determining whether to receive or reject the message on the basis of the information in the message received from the source terminal. The method of claim 1, wherein the information is
And transmitting the message in the message storage server. The method of claim 1, wherein the information is
Message transmission method in a CPM server, characterized in that the UID (Unique Identifier) for the message. The method of claim 1, wherein the CPM server
Message transmission method in a CPM server, characterized in that located in the home network of the terminal of the receiver. The method of claim 1,
Checking whether the message from the source terminal is in the CPM Large mode;
In the CPM Large mode, the method further comprises the step of waiting until another message from the source terminal is further received. The method of claim 1,
Receiving a response message from the terminal of the receiver;
And transmitting a response message from the receiver terminal to a CPM server located in the home network of the source terminal. The method of claim 8,
When there are a plurality of terminals of the receiver,
Among the response messages from the plurality of terminals, when a first response message is received, the first response message is transmitted to a CPM server located in the home network of the source terminal. . Message transmission method performed by a Converged IP Messaging (CPM) server.
Determining whether to transmit the message received from the source terminal in an interworking manner;
If it is determined that the message is to be transmitted in an interworking manner, determining whether to store the message in a message storage server based on user settings or policies;
Requesting the message storage server to store the message if it is determined that the message is stored at the message storage server;
Obtaining information on the stored message from the message storage server;
Based on the user setting or policy, determining whether one or more of the receiver's terminals are capable of receiving a message from the source terminal;
Transmitting a message including the information to an entity for interworking so that the message is transmitted to at least one receiver terminal according to the verification result,
And the information is used for a synchronization procedure. The method of claim 10, wherein the information is
And transmitting the message in the message storage server. The method of claim 10, wherein the information is
Message transmission method in a CPM server, characterized in that the UID (Unique Identifier) for the message. The method of claim 10, wherein the CPM server
Message transmission method in a CPM server, characterized in that located in the home network of the terminal of the receiver. As a Converged IP Messaging (CPM) server,
A processor for determining whether to transmit a message received from a source terminal, and for storing the message in a message storage server based on a user setting or a policy when determining to transmit the message;
If it is determined that the message is to be stored in the message storage server, requesting the message storage server to store the message, and including a transceiver for obtaining information on the stored message from the message storage server,
When the processor acquires the information, the processor determines whether there is at least one terminal among the receiver's terminals capable of receiving a message from the source terminal based on the user setting or policy, and the at least one according to the verification result. Transmitting a message including the information to the receiver terminal;
Wherein the information is used for a synchronization procedure. 15. The method of claim 14, wherein said information is
And distinguish the message in the message storage server. 15. The method of claim 14, wherein said information is
A server, characterized in that the UID (Unique Identifier) for the message. The method of claim 1,
And the synchronization procedure is performed between at least one of the terminals of the receiver and the message storage server. The method of claim 1,
For the synchronization procedure, the information is used to prevent the message from being repeated in the terminal. The method of claim 1, wherein the message is changed from another type of message. The method of claim 1, wherein the message is received from an external entity in charge of interworking. As a terminal that supports Converged IP Messaging (CPM) service,
A transceiver;
A control unit cooperating with the transceiver unit,
The control unit:
Receiving the first message including information on a first message from a first server through the transceiver;
Requesting the second server to synchronize between one or more CPM messages stored in the terminal and one or more CPM messages stored in the second server;
Receiving a list from the second server, the list including information about one or a plurality of messages stored in the second server, wherein information in the list is stored in the second server based on user settings or policies Is);
Determining whether to receive one or more messages stored in the second server based on the list received from the second server and information about the first message;
And receiving one or more messages except for messages having the same information as the first message according to the determination. The method of claim 21, wherein the information about the first message is
And a terminal generated by the second server. The method of claim 21,
If the user setting or policy indicates that the first message should be stored in the second server, the information about the first message is generated by the second server. The method of claim 21, wherein the first message is
Terminal, characterized in that changed from other types of messages. The method of claim 21, wherein the first message received from the first server is
And a terminal passing through the entity in charge of the interworking function.

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