CA2804067A1 - Method for indicating a ue that it must register - Google Patents
Method for indicating a ue that it must register Download PDFInfo
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- CA2804067A1 CA2804067A1 CA2804067A CA2804067A CA2804067A1 CA 2804067 A1 CA2804067 A1 CA 2804067A1 CA 2804067 A CA2804067 A CA 2804067A CA 2804067 A CA2804067 A CA 2804067A CA 2804067 A1 CA2804067 A1 CA 2804067A1
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- network
- warn
- user
- response message
- registration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1073—Registration or de-registration
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Business, Economics & Management (AREA)
- General Business, Economics & Management (AREA)
- Telephonic Communication Services (AREA)
Abstract
The invention proposes a method for controlling a network, wherein the network offers services to registered users, the method comprising the steps of receiving (Al) a service request from network device (UE) of a user, checking whether the user is registered or not, and if the user is not registered, generating a response message including warning information and sending (A2; B3 to B4) the response message to the network device (UE) of the user. The invention also proposes a corresponding network device. In this way, a user is informed that he has to register before he can obtain any services from the network.
Description
"METHOD FOR INDICATING A UE THAT IT MUST REGISTER"
This application is a divisional application of co-pending application Serial No. 2,446,966 filed May 9, 2001.
FIELD OF THE INVENTION
The present invention relates to a method and network for controlling a network which offers services to registered users.
BACKGROUND OF THE INVENTION
The invention concerns networks which offer services to registered users. For example, in the IP Multimedia (IM) Subsystem as defined by the 3rd Generation Partnership Project (3GPP), it is necessary for an UE to be registered before the UE can make use of the multimedia services.
Thus, in case the user (i.e., UE) does not send a registration request (e.g., a SIP (Session Initiation Protocol) REGISTER message) first, the network is not able to handle service requests from that user, which leads to a failure. In turn, the user is not notified about the failure and, hence, is not able to identify the reason for the failure, i.e., the non-acceptance of the service request.
Moreover, in a 3GPP environment, the network can initiate a Network Initiated De-registration. This is performed, for example, in order to avoid problems in the servers. The user may or may not be notified about the action, depending on whether he is previously subscribed to be notified and he is reachable or not.
This application is a divisional application of co-pending application Serial No. 2,446,966 filed May 9, 2001.
FIELD OF THE INVENTION
The present invention relates to a method and network for controlling a network which offers services to registered users.
BACKGROUND OF THE INVENTION
The invention concerns networks which offer services to registered users. For example, in the IP Multimedia (IM) Subsystem as defined by the 3rd Generation Partnership Project (3GPP), it is necessary for an UE to be registered before the UE can make use of the multimedia services.
Thus, in case the user (i.e., UE) does not send a registration request (e.g., a SIP (Session Initiation Protocol) REGISTER message) first, the network is not able to handle service requests from that user, which leads to a failure. In turn, the user is not notified about the failure and, hence, is not able to identify the reason for the failure, i.e., the non-acceptance of the service request.
Moreover, in a 3GPP environment, the network can initiate a Network Initiated De-registration. This is performed, for example, in order to avoid problems in the servers. The user may or may not be notified about the action, depending on whether he is previously subscribed to be notified and he is reachable or not.
- 2 -If the user has been de-registered from the network but he was not notified because of one of the above listed reasons, he may anytime send a session initiation request to the network. If that is the case, the network cannot serve the user since it is not registered. However, also in this case the user is not aware of the fact that he is no longer registered.
Thus, the above situations lead to the problem that a user cannot be served and that the user is not aware why the network does not accept his service request.
SUMMARY OF THE INVENTION
Therefore, the object underlying the invention resides in removing the above drawbacks of the prior art.
Accordingly, in one aspect of the invention there is provided a method comprising:
receiving a service request from a network device of a user, wherein said service request is a session initiation protocol invite request;
checking, in a network control device, to determine if the user is registered to a network that offers services to registered users by referring to information about a registration status of the user stored in a home subscriber server, a proxy call state control function or a serving call state control function;
if the user is not registered, generating a response message including warn information and sending the response message from the network control device to the network device of the user, wherein the response message is a session initiation protocol 403 forbidden response; and triggering an automatic registration in the network device of the user in response to the response message.
Thus, according to the invention, the user is automatically informed that he is not registered. Hence, an easy handling of service requests of non-registered users is achieved.
Thus, the above situations lead to the problem that a user cannot be served and that the user is not aware why the network does not accept his service request.
SUMMARY OF THE INVENTION
Therefore, the object underlying the invention resides in removing the above drawbacks of the prior art.
Accordingly, in one aspect of the invention there is provided a method comprising:
receiving a service request from a network device of a user, wherein said service request is a session initiation protocol invite request;
checking, in a network control device, to determine if the user is registered to a network that offers services to registered users by referring to information about a registration status of the user stored in a home subscriber server, a proxy call state control function or a serving call state control function;
if the user is not registered, generating a response message including warn information and sending the response message from the network control device to the network device of the user, wherein the response message is a session initiation protocol 403 forbidden response; and triggering an automatic registration in the network device of the user in response to the response message.
Thus, according to the invention, the user is automatically informed that he is not registered. Hence, an easy handling of service requests of non-registered users is achieved.
- 3 -As the response message is a SIP (Session Initiation Protocol)403 Forbidden response, a predefined standard message may be used for transporting the warning information. Therefore, the invention can easily be applied into existing systems.
The warning information may comprise warn-text. This warn-text may be intelligible to the user such that he can easily be informed about the situation.
The warn-text may be predefined warn-text. In this way, the user can be informed more clearly, since the warn-text is predefined and, hence, familiar to the user.
The warning information may comprise a predefined warn-code. In this way, also the user equipment WE) of the user can easily be informed about the non-registration by using the predefined code.
According to another aspect of the invention there is provided a device configured to:
receive a service request from a network device of a user, wherein said service request is a session initiation protocol invite request;
check to determine if the user requesting the service is registered to a network that offers services to registered users by referring to information about a registration status of the user stored in a home subscriber server, a proxy call state control function or a serving call state control function;
generate a response message containing warn information to the user, when the user is not registered, wherein the response message is a session initiation protocol 403 forbidden response;
and perform an automatic registration in reaction to the response message.
According to yet another aspect of the invention there is provided a method comprising:
sending a service request to a network which offers services to registered users, wherein said service request is a - 3a -session initiation protocol invite request;
receiving a response message; and performing an automatic registration to the network when the response message contains predetermined warn information indicating that the user is not registered to the network, wherein the response message is a session initiation protocol 403 forbidden response.
According to yet another aspect of the invention there is provided a method comprising:
sending a service request to a network which offers services to registered users, wherein said service request is a session initiation protocol invite request;
receiving a response message; and performing an automatic registration to the network when the response message contains predetermined warn information indicating that the user is not registered to the network, wherein the response message is a session initiation protocol 403 forbidden response.
According to yet another aspect of the invention there is provided a device comprising:
means for sending a service request to a network which offers services to registered users, wherein said service request is a session initiation protocol invite request;
means for receiving a response message; and means for performing an automatic registration to the network when the response message contains predetermined warn information indicating that a user is not registered to the network, wherein the response message is a session initiation protocol 403 forbidden response.
According to yet another aspect of the invention there is provided a method, comprising:
receiving a service request from a network device of a user, wherein said service request is a session initiation protocol invite request; and - 3b -checking, in a network control device, to determine if the user is registered to a network, by referring to information about a registration status of the user stored in a home subscriber server or in the network control device being a proxy call state control function or a serving call state control function, wherein the network offers services to registered users, and if the user is not registered, generating a response message including warn information and sending the response message from the network control device to the network device of the user, wherein the response message is a session initiation protocol 403 forbidden message, and wherein the warn information triggers an automatic registration in the network device of the user, in which the network device of the user sends a register request to the network control device automatically when the network device of the user receives the response message.
According to yet another aspect of the invention there is provided an apparatus, comprising:
a connector configured to connect to a network that offers services to registered users;
a sender configured to send a service request to the network, wherein said service request is a session initiation protocol invite request;
a receiver configured to receive a response message from the network, the response message being a session initiation protocol 403 forbidden message; and a controller, wherein when the response message comprises predetermined warn information indicating that the user is not registered to the network, the warn information triggers an automatic registration in the controller, in which the controller controls the sender to send a register request to the network automatically when the receiver receives the response message.
According to still yet another aspect of the invention there is provided a non-transitory computer readable medium, embodying instructions, which when executed, cause an apparatus to:
connect to a network, wherein the network is configured to offer services to registered users;- 3c -send a service request to the network, wherein said service request is a session initiation protocol invite request;
receive a response message from the network;
when the response message comprises predetermined warn information and is a session initiation protocol 403 forbidden message indicating that the user is not registered to the network, triggering an automatic registration in a controller;
and control a sender to send a register request to the network automatically when the response message is received.
The warning information may comprise warn-text. This warn-text may be intelligible to the user such that he can easily be informed about the situation.
The warn-text may be predefined warn-text. In this way, the user can be informed more clearly, since the warn-text is predefined and, hence, familiar to the user.
The warning information may comprise a predefined warn-code. In this way, also the user equipment WE) of the user can easily be informed about the non-registration by using the predefined code.
According to another aspect of the invention there is provided a device configured to:
receive a service request from a network device of a user, wherein said service request is a session initiation protocol invite request;
check to determine if the user requesting the service is registered to a network that offers services to registered users by referring to information about a registration status of the user stored in a home subscriber server, a proxy call state control function or a serving call state control function;
generate a response message containing warn information to the user, when the user is not registered, wherein the response message is a session initiation protocol 403 forbidden response;
and perform an automatic registration in reaction to the response message.
According to yet another aspect of the invention there is provided a method comprising:
sending a service request to a network which offers services to registered users, wherein said service request is a - 3a -session initiation protocol invite request;
receiving a response message; and performing an automatic registration to the network when the response message contains predetermined warn information indicating that the user is not registered to the network, wherein the response message is a session initiation protocol 403 forbidden response.
According to yet another aspect of the invention there is provided a method comprising:
sending a service request to a network which offers services to registered users, wherein said service request is a session initiation protocol invite request;
receiving a response message; and performing an automatic registration to the network when the response message contains predetermined warn information indicating that the user is not registered to the network, wherein the response message is a session initiation protocol 403 forbidden response.
According to yet another aspect of the invention there is provided a device comprising:
means for sending a service request to a network which offers services to registered users, wherein said service request is a session initiation protocol invite request;
means for receiving a response message; and means for performing an automatic registration to the network when the response message contains predetermined warn information indicating that a user is not registered to the network, wherein the response message is a session initiation protocol 403 forbidden response.
According to yet another aspect of the invention there is provided a method, comprising:
receiving a service request from a network device of a user, wherein said service request is a session initiation protocol invite request; and - 3b -checking, in a network control device, to determine if the user is registered to a network, by referring to information about a registration status of the user stored in a home subscriber server or in the network control device being a proxy call state control function or a serving call state control function, wherein the network offers services to registered users, and if the user is not registered, generating a response message including warn information and sending the response message from the network control device to the network device of the user, wherein the response message is a session initiation protocol 403 forbidden message, and wherein the warn information triggers an automatic registration in the network device of the user, in which the network device of the user sends a register request to the network control device automatically when the network device of the user receives the response message.
According to yet another aspect of the invention there is provided an apparatus, comprising:
a connector configured to connect to a network that offers services to registered users;
a sender configured to send a service request to the network, wherein said service request is a session initiation protocol invite request;
a receiver configured to receive a response message from the network, the response message being a session initiation protocol 403 forbidden message; and a controller, wherein when the response message comprises predetermined warn information indicating that the user is not registered to the network, the warn information triggers an automatic registration in the controller, in which the controller controls the sender to send a register request to the network automatically when the receiver receives the response message.
According to still yet another aspect of the invention there is provided a non-transitory computer readable medium, embodying instructions, which when executed, cause an apparatus to:
connect to a network, wherein the network is configured to offer services to registered users;- 3c -send a service request to the network, wherein said service request is a session initiation protocol invite request;
receive a response message from the network;
when the response message comprises predetermined warn information and is a session initiation protocol 403 forbidden message indicating that the user is not registered to the network, triggering an automatic registration in a controller;
and control a sender to send a register request to the network automatically when the response message is received.
- 4 -Moreover, it may be checked whether the user had a valid registration before or not, wherein in case the user had no valid registration before, the information that a registration is required is inserted into the warn information.
Alternatively, it may be checked whether the user had a valid registration before or not and whether a de-registration of the user had been performed, and wherein in case the user had a valid registration before and a de-registration of the user had been performed, the information that a re-registration is required is inserted into the warn information.
Thus, also the condition that the user had a valid registration before and a de-registration was performed is considered, and the user is informed about this condition.
The network may be a third generation network, wherein the generating step is performed in a proxy call state control function (P-CSCF).
The network may be a third generation network, and wherein the generating step is performed in a serving call state control function (S-CSCF).
The invention also proposes a network device being connectable to a network, the network offering services to registered users, wherein the device is adapted to receive a message and to perform an automatic registration to the network in case the message contains a predetermined warn information. The warn information may contain a warn-code, and/or may contain a warn-text.
Alternatively, it may be checked whether the user had a valid registration before or not and whether a de-registration of the user had been performed, and wherein in case the user had a valid registration before and a de-registration of the user had been performed, the information that a re-registration is required is inserted into the warn information.
Thus, also the condition that the user had a valid registration before and a de-registration was performed is considered, and the user is informed about this condition.
The network may be a third generation network, wherein the generating step is performed in a proxy call state control function (P-CSCF).
The network may be a third generation network, and wherein the generating step is performed in a serving call state control function (S-CSCF).
The invention also proposes a network device being connectable to a network, the network offering services to registered users, wherein the device is adapted to receive a message and to perform an automatic registration to the network in case the message contains a predetermined warn information. The warn information may contain a warn-code, and/or may contain a warn-text.
- 5 -BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be more readily understood with reference to the accompanying drawings in which:
Fig. 1 shows a diagram of the network system to which first and second embodiments are applicable, Fig. 2 shows a signaling diagram of the procedure according to the first embodiment, and Fig. 3 shows a signaling diagram of the procedure according to a second embodiment.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
In the following, preferred embodiments of the invention are described in more detail with reference to the accompanying drawings.
Fig. 1 shows a simplified network system to which the embodiments are applicable. The network system may be configured according to IP Multimedia Subsystem concepts as defined by the 31 Generation Partnership Project (3GPP).
The network system comprises a home network of a User equipment CUE) and a visited network. The home network comprises a Serving Call State Control Function (S-CSCF) which controls services for the user (i.e., UE). The S-CScF
accesses an HSS (Home Subscriber Server) in order to obtain information regarding the user. The visited network comprises a Proxy Call State Control Function (P-CSCF) basically performs an interface function for
The present invention will be more readily understood with reference to the accompanying drawings in which:
Fig. 1 shows a diagram of the network system to which first and second embodiments are applicable, Fig. 2 shows a signaling diagram of the procedure according to the first embodiment, and Fig. 3 shows a signaling diagram of the procedure according to a second embodiment.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
In the following, preferred embodiments of the invention are described in more detail with reference to the accompanying drawings.
Fig. 1 shows a simplified network system to which the embodiments are applicable. The network system may be configured according to IP Multimedia Subsystem concepts as defined by the 31 Generation Partnership Project (3GPP).
The network system comprises a home network of a User equipment CUE) and a visited network. The home network comprises a Serving Call State Control Function (S-CSCF) which controls services for the user (i.e., UE). The S-CScF
accesses an HSS (Home Subscriber Server) in order to obtain information regarding the user. The visited network comprises a Proxy Call State Control Function (P-CSCF) basically performs an interface function for
- 6 -connecting the UE to the S-CSCF in his home network. S-CSCF is located in the home network of the UE, which is roaming in the visited network and attached to the P-CSCF.
Next, the first embodiment is described. According to the first embodiment, it is assumed that the user sends an SIP (Session Initiation Protocol) INVITE message before it sends a REGISTER to the network. The network returns a 403 Forbidden message to the user with a warning header.
In SIP, warning headers are used in response messages in order to carry additional information about the status of a response. Warning headers comprises the following fields: warn-code, warn-agent and warn-text.
The warn-code is a number consisting of three digits.
SIP-specific warn-codes start with a 3 as the first digit. The warn-agent indicates the name or pseudonym of the server which adds the warning header. The warn-text is a plain text intelligible to the human user.
According to the present embodiment, the warning header comprises a warn-text of "Registration Needed". This warn-text is associated with a 3GPP specific warn-code.
Hence, it should start with another digit than 3 in order to distinguish it form SIP-specific warn-codes. The 3GPP
warn-code should preferably trigger at UE a Register message to be sent towards the network.
Fig. 2 shows a signaling flow according to the first embodiment, which illustrates the above procedure in more detail. As mentioned above, it is assumed that the user (i.e., UE) is not registered to the network. That is, the first action performed by the UE is sending a SIP INVITE
Next, the first embodiment is described. According to the first embodiment, it is assumed that the user sends an SIP (Session Initiation Protocol) INVITE message before it sends a REGISTER to the network. The network returns a 403 Forbidden message to the user with a warning header.
In SIP, warning headers are used in response messages in order to carry additional information about the status of a response. Warning headers comprises the following fields: warn-code, warn-agent and warn-text.
The warn-code is a number consisting of three digits.
SIP-specific warn-codes start with a 3 as the first digit. The warn-agent indicates the name or pseudonym of the server which adds the warning header. The warn-text is a plain text intelligible to the human user.
According to the present embodiment, the warning header comprises a warn-text of "Registration Needed". This warn-text is associated with a 3GPP specific warn-code.
Hence, it should start with another digit than 3 in order to distinguish it form SIP-specific warn-codes. The 3GPP
warn-code should preferably trigger at UE a Register message to be sent towards the network.
Fig. 2 shows a signaling flow according to the first embodiment, which illustrates the above procedure in more detail. As mentioned above, it is assumed that the user (i.e., UE) is not registered to the network. That is, the first action performed by the UE is sending a SIP INVITE
- 7 -request to the P-CSCF, as indicated in step Al. In this example, it is assumed that the UE is not registered, and a corresponding response is sent back to the UE in step A2.
That is, in step A2, the P-CSCF returns a 4.xx final response, preferably a 403 Forbidden Message to the UE.
In the 403 Forbidden Message, a warning header containing a warn-text of, e.g., "Registration Needed" and a corresponding 3GPP specific warn-code is included. This warn-code should be standardized, and, for example, should preferably be defined by the IANA (Internet Assigned Numbers Authority).
The P-CSCF sends the 403 Forbidden Message to the UE in step A2. Thus, the UE is informed that the SIP INVITE
message sent in step Al was unsuccessful, and in addition the UE is also informed why the INVITE message was unsuccessful, namely, because the UE is not yet registered to the network.
Preferably, the UE is triggered by the 403 Forbidden Message to send a SIP REGISTER message, as indicated in step A3. By using the above-mentioned 3GPP specific warn-code, the UE can be triggered to automatically send such a register request without that the user has to input manually a corresponding request. That is, the UE may be adapted to automatically perform the registration in response to receiving the above-described warn-code.
After sending the SIP REGISTER message in step A3, the normal registration procedure is carried out. A detailed description thereof is omitted for simplifying the illustration.
That is, in step A2, the P-CSCF returns a 4.xx final response, preferably a 403 Forbidden Message to the UE.
In the 403 Forbidden Message, a warning header containing a warn-text of, e.g., "Registration Needed" and a corresponding 3GPP specific warn-code is included. This warn-code should be standardized, and, for example, should preferably be defined by the IANA (Internet Assigned Numbers Authority).
The P-CSCF sends the 403 Forbidden Message to the UE in step A2. Thus, the UE is informed that the SIP INVITE
message sent in step Al was unsuccessful, and in addition the UE is also informed why the INVITE message was unsuccessful, namely, because the UE is not yet registered to the network.
Preferably, the UE is triggered by the 403 Forbidden Message to send a SIP REGISTER message, as indicated in step A3. By using the above-mentioned 3GPP specific warn-code, the UE can be triggered to automatically send such a register request without that the user has to input manually a corresponding request. That is, the UE may be adapted to automatically perform the registration in response to receiving the above-described warn-code.
After sending the SIP REGISTER message in step A3, the normal registration procedure is carried out. A detailed description thereof is omitted for simplifying the illustration.
- 8 -It is noted that for the above-described automatic registration the warn-text is optional. That is, in order to trigger an automatic registration of the UE, only the warn-code is necessary.
The same procedure as described above may be used to trigger a Register from the UE when an INVITE arrives to the P-CSCF after the Registration of the user expired in P-CSCF, i.e., in a case in which the registration is timely limited. The "Registration Needed" warning header is preferably only be inserted by a P-CSCF, since this element provides an interface of the network to the UE.
It is noted that in the above description it is assumed that information about the status of user (i.e., registered or not registered) is stored in the HSS.
However, this information may also be stored in a database in the S-CSCF or also in the P-CSCF. In this way, the need for forwarding the inquiries to the HSS or to the home network is eliminated.
Next, a second embodiment is described with reference to Fig. 3.
According to the second embodiment, it is assumed that the UE was registered, but that the home network where the UE is registered performs a Network Initiated De-registration for this user. This implies that S-CSCF will delete the user from the registered users' database. This may not implicitly imply that the P-CSCF will also delete it.
In the following, signalling for this case is described by referring to Fig. 3. In step Bl, the UE sends a SIP
The same procedure as described above may be used to trigger a Register from the UE when an INVITE arrives to the P-CSCF after the Registration of the user expired in P-CSCF, i.e., in a case in which the registration is timely limited. The "Registration Needed" warning header is preferably only be inserted by a P-CSCF, since this element provides an interface of the network to the UE.
It is noted that in the above description it is assumed that information about the status of user (i.e., registered or not registered) is stored in the HSS.
However, this information may also be stored in a database in the S-CSCF or also in the P-CSCF. In this way, the need for forwarding the inquiries to the HSS or to the home network is eliminated.
Next, a second embodiment is described with reference to Fig. 3.
According to the second embodiment, it is assumed that the UE was registered, but that the home network where the UE is registered performs a Network Initiated De-registration for this user. This implies that S-CSCF will delete the user from the registered users' database. This may not implicitly imply that the P-CSCF will also delete it.
In the following, signalling for this case is described by referring to Fig. 3. In step Bl, the UE sends a SIP
- 9 -INVITE message to the P-CSCF. There might be cases when the UE's registration is valid in P-CSCF but not valid anymore in S-CSCF. Hence, the P-CSCF forwards the SIP INVITE
message to the S-CSCF in step 82.
However, the S-CSCF finds that the UE has been deregistered, or the timer associated with the registration expired, etc., i.e., UE no longer has a valid registration. Hence, the S-CSCF returns a 403 Forbidden response to the user. Since in this scenario the user might recently have a valid registration, the S-CSCF preferably inserts another warning header with a warn-text of "Re-Registration Needed". As described in the first embodiment, this warn-text should preferably be associated with a 3GPP specific warn-code (which may be the same as according to the first embodiment). The S-CSCF sends the 403 Forbidden message composed in this way to the P-CSCF (step B3), which in turn forwards it to the UE (step B4).
Similar as according to the first embodiment, the warn-text and the warn-code should preferably trigger at the UE a Re-Registration to be sent towards the network, as indicated in step B5. After this, the normal registration procedure is carried out. A detailed description thereof is omitted for simplifying the illustration.
The "Re-Registration Needed" warn-text is preferably inserted by an S-CSCF.
It is noted that in SIP a Registration and RE Registration look exactly the same. The reason for having different warn-texts is to inform the user at the UE that the user is not registered to the network yet or that a
message to the S-CSCF in step 82.
However, the S-CSCF finds that the UE has been deregistered, or the timer associated with the registration expired, etc., i.e., UE no longer has a valid registration. Hence, the S-CSCF returns a 403 Forbidden response to the user. Since in this scenario the user might recently have a valid registration, the S-CSCF preferably inserts another warning header with a warn-text of "Re-Registration Needed". As described in the first embodiment, this warn-text should preferably be associated with a 3GPP specific warn-code (which may be the same as according to the first embodiment). The S-CSCF sends the 403 Forbidden message composed in this way to the P-CSCF (step B3), which in turn forwards it to the UE (step B4).
Similar as according to the first embodiment, the warn-text and the warn-code should preferably trigger at the UE a Re-Registration to be sent towards the network, as indicated in step B5. After this, the normal registration procedure is carried out. A detailed description thereof is omitted for simplifying the illustration.
The "Re-Registration Needed" warn-text is preferably inserted by an S-CSCF.
It is noted that in SIP a Registration and RE Registration look exactly the same. The reason for having different warn-texts is to inform the user at the UE that the user is not registered to the network yet or that a
- 10 -recent valid registration was just invalidated by the network, respectively.
It is noted that the invention is not limited to the embodiments described above. Various amendments and modifications are possible.
In particular, the embodiments may be combined. That is, both procedures may be applied in a network system, and depending on the situation the 403 Forbidden message sent to the UE may include the "Registration Needed" or the "Re-Registration Needed" warn-text and a corresponding warn-code.
Furthermore, it is noted that the IP Multimedia Subsystem is only taken as an example. That is, the invention may be applied to any network system in which a user has to be registered before he may obtain any services Moreover, also the SIP protocol is only taken as an example. Instead, any protocol messages into which specific warn-texts and/or warn-code may be included, can be used.
It is noted that the invention is not limited to the embodiments described above. Various amendments and modifications are possible.
In particular, the embodiments may be combined. That is, both procedures may be applied in a network system, and depending on the situation the 403 Forbidden message sent to the UE may include the "Registration Needed" or the "Re-Registration Needed" warn-text and a corresponding warn-code.
Furthermore, it is noted that the IP Multimedia Subsystem is only taken as an example. That is, the invention may be applied to any network system in which a user has to be registered before he may obtain any services Moreover, also the SIP protocol is only taken as an example. Instead, any protocol messages into which specific warn-texts and/or warn-code may be included, can be used.
Claims (30)
1. A method comprising:
receiving a service request from a network device of a user, wherein said service request is a session initiation protocol invite request;
checking, in a network control device, to determine if the user is registered to a network that offers services to registered users by referring to information about a registration status of the user stored in a home subscriber server, a proxy call state control function or a serving call state control function;
if the user is not registered, generating a response message including warn information and sending the response message from the network control device to the network device of the user, wherein the response message is a session initiation protocol 403 forbidden response; and triggering an automatic registration in the network device of the user in response to the response message.
receiving a service request from a network device of a user, wherein said service request is a session initiation protocol invite request;
checking, in a network control device, to determine if the user is registered to a network that offers services to registered users by referring to information about a registration status of the user stored in a home subscriber server, a proxy call state control function or a serving call state control function;
if the user is not registered, generating a response message including warn information and sending the response message from the network control device to the network device of the user, wherein the response message is a session initiation protocol 403 forbidden response; and triggering an automatic registration in the network device of the user in response to the response message.
2. The method according to claim 1, wherein the warn information comprises warn-text.
3. The method according to claim 2, wherein the warn-text is predefined warn-text.
4. The method according to claim 1, wherein the warn information comprises a predefined warn-code.
5. The method according to claim 1, further comprising checking whether the user had a valid registration before or not, wherein when the user had no valid registration before, during generating the response message, the information that a registration is required is inserted into the warn information.
6. The method according to claim 5, wherein the network is a third generation network, and wherein the generating step is performed in the proxy call state control function.
7. The method according to claim 1, further comprising checking whether the user had a valid registration before or not and whether a de-registration of the user had been performed, wherein when the user had a valid registration before and a de-registration of the user had been performed, during generating the response message, the information that a re-registration is required is inserted into the warn information.
8. The method according to claim 7, wherein the network is a third generation network, and wherein the generating step is performed in the serving call state control function.
9. A device configured to:
receive a service request from a network device of a user, wherein said service request is a session initiation protocol invite request;
check to determine if the user requesting the service is registered to a network that offers services to registered users by referring to information about a registration status of the user stored in a home subscriber server, a proxy call state control function or a serving call state control function;
generate a response message containing warn information to the user, when the user is not registered, wherein the response message is a session initiation protocol 403 forbidden response; and perform an automatic registration in reaction to the response message.
receive a service request from a network device of a user, wherein said service request is a session initiation protocol invite request;
check to determine if the user requesting the service is registered to a network that offers services to registered users by referring to information about a registration status of the user stored in a home subscriber server, a proxy call state control function or a serving call state control function;
generate a response message containing warn information to the user, when the user is not registered, wherein the response message is a session initiation protocol 403 forbidden response; and perform an automatic registration in reaction to the response message.
10. The device according to claim 9, wherein the warn information comprises warn-text.
11. The device according to claim 10, wherein the warn-text is predefined warn-text.
12. The device according to claim 9, wherein the warn information comprises a predefined warn-code.
13. The device according to claim 9, wherein the device is further configured to check whether the user had a valid registration before or not, and when the user had no valid registration before, to insert into the warn information the information that a registration is required.
14. The device according to claim 9, wherein the device is further configured to check whether the user had a valid registration before or not and to check whether a de-registration of the user had been performed, and to insert into the warn information the information that a re-registration is required when the user had a valid registration before and a de-registration of the user had been performed.
15. The device according to claim 9, wherein the network is a third generation network, and wherein the device is the proxy call state control function.
16. The device according to claim 9, wherein the network is a third generation network, and wherein the device is the serving call state control function.
17. A device connectable to a network that offers services to registered users, wherein the device is configured to:
send a service request to a network control device of the network, said service request being a session initiation protocol invite request;
receive a response message from the network control device; and perform an automatic registration to the network when the response message contains predetermined warn information indicating that the user of the device is not registered to the network, wherein the response message is a session initiation protocol 403 forbidden response.
send a service request to a network control device of the network, said service request being a session initiation protocol invite request;
receive a response message from the network control device; and perform an automatic registration to the network when the response message contains predetermined warn information indicating that the user of the device is not registered to the network, wherein the response message is a session initiation protocol 403 forbidden response.
18. The device according to claim 17, wherein the warn information contains a warn-code.
19. The device according to claim 17, wherein the warn information contains warn-text.
20. A method comprising:
sending a service request to a network which offers services to registered users, wherein said service request is a session initiation protocol invite request;
receiving a response message; and performing an automatic registration to the network when the response message contains predetermined warn information indicating that the user is not registered to the network, wherein the response message is a session initiation protocol 403 forbidden response.
sending a service request to a network which offers services to registered users, wherein said service request is a session initiation protocol invite request;
receiving a response message; and performing an automatic registration to the network when the response message contains predetermined warn information indicating that the user is not registered to the network, wherein the response message is a session initiation protocol 403 forbidden response.
21. The method according to claim 20, wherein the warn information contains a warn-code.
22. The method according to claim 20, wherein the warn information contains warn-text.
23. A method, comprising:
receiving a service request from a network device of a user, wherein said service request is a session initiation protocol invite request; and checking, in a network control device, to determine if the user is registered to a network, by referring to information about a registration status of the user stored in a home subscriber server or in the network control device being a proxy call state control function or a serving call state control function, wherein the network offers services to registered users, and if the user is not registered, generating a response message including warn information and sending the response message from the network control device to the network device of the user, wherein the response message is a session initiation protocol 403 forbidden message, and wherein the warn information triggers an automatic registration in the network device of the user, in which the network device of the user sends a register request to the network control device automatically when the network device of the user receives the response message.
receiving a service request from a network device of a user, wherein said service request is a session initiation protocol invite request; and checking, in a network control device, to determine if the user is registered to a network, by referring to information about a registration status of the user stored in a home subscriber server or in the network control device being a proxy call state control function or a serving call state control function, wherein the network offers services to registered users, and if the user is not registered, generating a response message including warn information and sending the response message from the network control device to the network device of the user, wherein the response message is a session initiation protocol 403 forbidden message, and wherein the warn information triggers an automatic registration in the network device of the user, in which the network device of the user sends a register request to the network control device automatically when the network device of the user receives the response message.
24. The method according to claim 23, wherein the warn information comprises warn-text.
25. The method according to claim 24, wherein the warn-text is predefined warn-text.
26. The method according to claim 23, wherein the warn information comprises a predefined warn-code.
27. An apparatus, comprising:
a connector configured to connect to a network that offers services to registered users;
a sender configured to send a service request to the network, wherein said service request is a session initiation protocol invite request;
a receiver configured to receive a response message from the network, the response message being a session initiation protocol 403 forbidden message; and a controller, wherein when the response message comprises predetermined warn information indicating that the user is not registered to the network, the warn information triggers an automatic registration in the controller, in which the controller controls the sender to send a register request to the network automatically when the receiver receives the response message.
a connector configured to connect to a network that offers services to registered users;
a sender configured to send a service request to the network, wherein said service request is a session initiation protocol invite request;
a receiver configured to receive a response message from the network, the response message being a session initiation protocol 403 forbidden message; and a controller, wherein when the response message comprises predetermined warn information indicating that the user is not registered to the network, the warn information triggers an automatic registration in the controller, in which the controller controls the sender to send a register request to the network automatically when the receiver receives the response message.
28. The apparatus according to claim 27, wherein the warn information comprises a warn-code.
29. The apparatus according to claim 27, wherein the warn information comprises warn-text.
30. A non-transitory computer readable medium, embodying instructions, which when executed, cause an apparatus to:
connect to a network, wherein the network is configured to offer services to registered users;
send a service request to the network, wherein said service request is a session initiation protocol invite request;
receive a response message from the network;
when the response message comprises predetermined warn information and is a session initiation protocol 403 forbidden message indicating that the user is not registered to the network, triggering an automatic registration in a controller; and control a sender to send a register request to the network automatically when the response message is received.
connect to a network, wherein the network is configured to offer services to registered users;
send a service request to the network, wherein said service request is a session initiation protocol invite request;
receive a response message from the network;
when the response message comprises predetermined warn information and is a session initiation protocol 403 forbidden message indicating that the user is not registered to the network, triggering an automatic registration in a controller; and control a sender to send a register request to the network automatically when the response message is received.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2804067A CA2804067A1 (en) | 2001-05-09 | 2001-05-09 | Method for indicating a ue that it must register |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2804067A CA2804067A1 (en) | 2001-05-09 | 2001-05-09 | Method for indicating a ue that it must register |
| CA2446966A CA2446966C (en) | 2001-05-09 | 2001-05-09 | Method for indicating a ue that it must register |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2446966A Division CA2446966C (en) | 2001-05-09 | 2001-05-09 | Method for indicating a ue that it must register |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2804067A1 true CA2804067A1 (en) | 2002-11-14 |
Family
ID=48482797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2804067A Abandoned CA2804067A1 (en) | 2001-05-09 | 2001-05-09 | Method for indicating a ue that it must register |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2804067A1 (en) |
-
2001
- 2001-05-09 CA CA2804067A patent/CA2804067A1/en not_active Abandoned
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| EEER | Examination request |
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