WO2011160350A1

WO2011160350A1 - Method and apparatus for key updating in multimedia broadcast system

Info

Publication number: WO2011160350A1
Application number: PCT/CN2010/077362
Authority: WO
Inventors: 朱姗姗; 王晔; 孙雷; 张浩军; 陈林锋
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-25
Filing date: 2010-09-27
Publication date: 2011-12-29
Also published as: CN102300154A; CN102300154B

Abstract

The present invention discloses a method and apparatus for key updating in a multimedia broadcast system. The method includes: a terminal creates a corresponding service key request message according to the identifier of a subscription suite and transmits said message to a Network Application Function (NAF) via a Wireless Application Protocol (WAP) gateway; after receiving the service key request message, the NAF, according to the suite identifier of said message, encapsulates the service keys of all the services in said suite into a key packet, and transmits a service key message carrying said key packet to the terminal via the WAP gateway; the terminal parses the received service key message, obtains said service keys and writes them into itself. The present invention pushes updated keys according to suites, wherein, the load for pushing keys only increases with the increase of the number of suites and the number of users and has no direct relation to the number of services, and therefore, the times for pushing service keys are greatly decreased and the bandwidth resource is saved.

Description

Method and device for key update in multimedia broadcast system

The present invention relates to a key update technique, and in particular, to a method and apparatus for key update in a multimedia broadcast system. Background technique

The multimedia broadcast service management system, namely the Mobile Broadcast Business Management System (MBBMS), is a mobile TV service based on broadcast technology. MBBMS not only enables the use of broadcast-based video streams on mobile phones to become as popular as TV, but also becomes operational and manageable.

Key management is one of the main management functions of the MBBMS system. At present, for the key update in key management, the third generation Partnership Projects (3GPP) method is adopted, that is, key push is performed one by one for each updated channel. With the widespread popularity of mobile TV services, the number of channels is also increasing, and key pushes are performed on a pair of channels, which is bound to exert tremendous pressure on the key update process. Moreover, the MBBMS itself is a triple play service, and the process of key acquisition has been very long. If the key is pushed for each channel according to the existing method, the interaction between the systems will be quite frequent. The key is updated periodically every month. As the number of users and the number of channels increase, it will inevitably result in the network channel being blocked due to congestion in the key push process, and eventually the user cannot watch the mobile TV.

The above problems are mainly caused by the subscription mode of mobile TV services. Currently, users subscribe to the service according to the package. The package can contain one channel or multiple channels. From the perspective of operating models, multi-channel packages will be the mainstream now and in the future, both domestically and internationally. According to the existing method, for a multi-channel package, the key update of each month requires multiple push processes, and the terminal needs to initiate multiple key request processes, resulting in waste of resources. Summary of the invention

An object of the present invention is to provide a key update method and apparatus in a multimedia broadcast system, which can effectively reduce the number of key pushes.

According to an aspect of the present invention, a method for updating a key in a multimedia broadcast system includes the following steps: A. A terminal generates a corresponding service key request message according to an identifier of a subscription package, and sends the message to the NAF via a WAP gateway. After receiving the service key request message, the NAF encapsulates the service key of all services in the package in a key package according to the package identifier in the message, and sends the service key to the terminal via the WAP gateway. Carrying the service key message of the key package; and C, the terminal parsing the received service key message, obtaining the service key and writing itself.

In the foregoing solution, before the step A, the method further includes: after the terminal subscribes to the package, the NAF allocates a package identifier to the terminal, and sends the package identifier to the terminal.

In the foregoing solution, before the step A, the method further includes: the NAF updating its own service key, and sending a service key update notification message with the package identifier to the terminal via the short message gateway and the short message center.

In the above solution, after updating the service key of the NAF, the NAF checks and caches the package subscription information of the user terminal, and the package subscription information of the user terminal includes the package identifier.

In the above aspect, the NAF stores a package identifier of each package, a correspondence between a service identifier and a package identifier of all services included in each package, and a service key corresponding to the service included in each package, and the NAF is dense according to the service. The key request message encapsulates the service key of all services in the package in a key package.

In the above solution, the NAF encapsulates the service key of all the services in the package in the key package according to the service key request message, specifically: the NAF according to the received service key request message. In the package identifier, the service identifier of all the services included in the corresponding package and the service key corresponding to each service identifier are queried, and all the service keys queried are encapsulated in one In the key package, the package identifier is an identifier corresponding to a single package, the service identifier is an identifier corresponding to a service, and a service corresponds to a service key.

According to another aspect of the present invention, a key update apparatus in a multimedia broadcast system is provided, including: a receiving module, configured to receive a service key request message that is sent by a terminal and includes a package identifier of the terminal subscription package; a module, configured to encapsulate, according to the package identifier in the service key request message received by the receiving module, a service key of all services in the package in a key package; and, a sending module, configured to send the The encapsulating module has a packaged key package for the terminal to update the service key.

In the above solution, the device further includes: a key update module, configured to update the service key of the NAF, and send a service key update notification message with the package identifier to the terminal via the short message gateway and the short message center.

In the above solution, the terminal is configured to: after receiving the service key update notification message with the package identifier, generate a corresponding service key request message according to the package identifier, and send the message to the receiving module via the WAP gateway. Send the message.

Compared with the prior art, the present invention has the following advantages: The present invention pushes the updated key according to the package, and the pressure of pushing the key increases only as the number of packages and the number of users increases, and there is no direct relationship with the number of services. Because the number of packages is much smaller than the number of services, the number of service key pushes can be greatly reduced, bandwidth resources can be saved, system pressure can be reduced, and system efficiency can be effectively improved. DRAWINGS

1 is a flowchart of a method for updating a key in a multimedia broadcast system according to an embodiment of the present invention; FIG. 2 is a schematic diagram showing a logical structure of a key update device in a multimedia broadcast system according to an embodiment of the present invention;

3 is a schematic structural diagram of a multimedia broadcast system networking according to an embodiment of the present invention; FIG. 4 is a schematic diagram of a service key update process according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of pushing a key according to a package identifier according to an embodiment of the present invention. detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

FIG. 1 is a flowchart of a method for updating a key in a multimedia broadcast system according to an embodiment of the present invention, as shown in FIG. 1:

Step S101: The terminal generates a corresponding service key request message according to the identifier of the subscription package, and sends the message to a network application function (NAF, Network Application Function) via a Wireless Application Protocol (WAP) gateway.

The NAF first updates its own service key and notifies the terminal to perform service key update. After that, the terminal sends a service key request message to the NAF.

Specifically, the NAF periodically updates the key, queries the database for information about the package and the service, and when the service key is pushed, checks the subscription status of the user terminal and caches the package subscription information of the user terminal. The package subscription information of the terminal includes a package identifier, and the NAF sends a service key update notification message (Notify) for notifying the terminal to update the service key according to the package subscription information of the user terminal, where the service key update notification message is carried. There is a package identifier, and the SMS gateway and the short message center receive the Notify message and forward it to the terminal, and return a response message to the NAF.

After receiving the Notify message, the terminal generates a corresponding service key request message according to the package identifier and sends the message to the NAF via the WAP gateway.

Alternatively, the terminal may initiate the update of the key by itself. After the terminal subscribes to the package, the NAF allocates a corresponding package identifier to the terminal and sends the corresponding package identifier to the terminal. When the terminal needs to initiate the key update, the terminal can generate a corresponding service key request message according to the package identifier allocated by the NAF, and send the message to the NAF.

Step S102, after receiving the service key request message, the NAF encapsulates the service key of all services in the package in a key package according to the package identifier in the message, and sends the service key through the WAP network. The off terminal sends a service key message carrying the key package.

After receiving the key request message, the NAF queries the service identifiers of all the services included in the package according to the package identifier, and then queries the corresponding service key according to each service identifier, and encapsulates the service keys in one. In the key package, a service key message carrying the encapsulated key package is then sent to the terminal via the WAP gateway.

Here, the NAF stores in advance the package identification of each package, the correspondence between the service identification of all the services included in each package, and the package identification, and the service key corresponding to the service included in each package.

The package identifier is an identifier corresponding to only one package, the service identifier is an identifier corresponding to only one service, and one service corresponds to one service key.

Step S103: The terminal parses the received service key message, obtains the service key, and writes it into itself.

FIG. 2 is a diagram showing the logical structure of a key update apparatus in a multimedia broadcast system according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes:

The receiving module is configured to receive a service key request message that is sent by the terminal and includes a package identifier of the terminal subscription package.

The encapsulating module is configured to encapsulate the service key of all services in the package in a key package according to the package identifier in the service key request message received by the receiving module.

And a sending module, configured to send the encapsulated key package of the encapsulating module, for the terminal to update the service key.

FIG. 3 is a schematic diagram of a network structure of a multimedia broadcast system according to an embodiment of the present invention. As shown in FIG. 3, the system includes a service processing module NAF, a short message gateway, a short message center, a WAP gateway, and a terminal, where the short message center is set in the office. In the short message gateway, the NAF accesses the mobile communication network through the short message gateway and the WAP gateway, and the terminal is wirelessly connected with the mobile communication network. The NAF includes a service control unit and a service key management unit, where the service control unit is mainly used to check the user set. The service key management unit includes the above-mentioned receiving module, encapsulating module and sending module, and is mainly used for updating and managing the service key. The terminal includes a card, and the card here mainly refers to a SIM card, which is used for saving, acquiring, and updating the service key of the terminal user.

FIG. 4 shows a process of updating a service key according to an embodiment of the present invention. As shown in FIG. 4, the service key update process of the NAF may specifically include the following steps:

Step 1: The NAF updates the service key at a specified time each month, and initiates a business key update process at a specified time.

Step 2: The NAF checks the subscription status of the user terminal, and the package subscription relationship of the user terminal, and caches the package subscription information of the user terminal.

Specifically, the NAF checks whether the package subscribed by the user terminal is legal, and/or whether the subscription relationship of the ordered package is legal, and/or whether the subscription period of the ordered package expires, and the package ordered by the user terminal, and the subscription thereof The relationship is saved, and information such as the package identifier and the order period of the package ordered by the user terminal is saved.

Step 3: The NAF sends a service key update notification message to the short message gateway according to the subscription status of the user terminal and the information of the package ordered by the user terminal.

Step 4: The SMS gateway returns a response message to the NAF.

Step 5: The short message gateway forwards the service key update notification message to the short message center.

Step 6. The SMS center returns a response message to the SMS gateway.

Step 7. The short message center forwards the service key update notification message to the terminal.

Step 8. After receiving the service key update notification message, the terminal initiates a service key request message to the WAP gateway of the access location according to the meal identifier in the message.

Step 9. The WAP gateway forwards the service key request message to the NAF.

Step 10: The NAF queries the service identifier of all the services in the corresponding package according to the package identifier carried in the service key request message, and then the service corresponding to the queried service identifier is dense. The key is encapsulated into a service key message packet.

Step 11: The NAF sends the service key message packet to the WAP gateway accessed by the user. Step 12: The WAP gateway sends the service key message packet to the terminal, and the terminal parses the service key message packet, and writes the service key into the card.

FIG. 5 shows a flow of pushing a key according to a package identifier according to an embodiment of the present invention. As shown in FIG. 5, the process of pushing a key according to the package identifier may specifically include the following steps:

Step S501: The NAF periodically updates the service key periodically, and the NAF saves the package identifier, the service key of all services included in each package, and the service identifier of all services included in each package in the database;

Step S502: The NAF performs the service key push every month. At this time, the NAF checks the subscription status of the user terminal, and caches the package subscription information of the user terminal.

Step S503: The NAF sends a service key update notification message to the terminal according to the subscription information of the user terminal.

Step S504: After receiving the service key update notification message sent by the NAF, the terminal uses the package identifier to initiate a service key request message to the NAF.

Step S505: The NAF queries, according to the package identifier carried in the service key request message, the service identifier of all services included in the corresponding package.

Step S506: After querying the service key corresponding to the service identifier, the NAF encapsulates the queried service key in a key package.

Step S507: The NAF sends a service key message to the terminal, where the message carries the encapsulated key package.

Step S508, the terminal receives the service key message sent by the NAF, and parses the service key into its own card after parsing, and the current process ends.

In summary, the present invention has the following technical effects: The present invention changes the original mode of pushing a key by channel, and instead pushes a new key according to the package identifier, and solves the problem of updating each month. The question to be pushed multiple times. Pushing a new key based on the package, the push pressure will only increase with the number of packages and the number of users, and is not directly related to the number of services. Since the number of packages is much smaller than the number of services, the present invention can greatly reduce the number of service key pushes, save bandwidth resources, reduce system pressure, and effectively improve system efficiency.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited thereto, and modifications of the present principles are understood to fall within the scope of the present invention.

Claims

Claim

A key update method in a multimedia broadcast system, comprising the steps of:

A. The terminal generates a corresponding service key request message according to the identifier of the subscription package, and sends the message to the NAF via the WAP gateway.

After receiving the service key request message, the NAF encapsulates the service key of all services in the package in the key package according to the package identifier in the message, and sends the bearer to the terminal via the WAP gateway. The service key message of the key package;

C. The terminal parses the received service key message, obtains the service key, and writes itself.

The method for updating a key in a multimedia broadcast system according to claim 1, wherein before the step A, the method further comprises: after the terminal subscribes to the package, the NAF allocates a package identifier to the terminal, and sends the Give the terminal.

The method for updating a key in a multimedia broadcast system according to claim 1, wherein before the step A, the method further comprises: updating the service key of the NAF by using the short message gateway and the short message center. A service key update notification message with a package identifier is sent to the terminal.

The method for updating a key in a multimedia broadcast system according to claim 3, wherein the NAF checks and caches package subscription information of the user terminal after updating the service key of the user, and the user terminal The package order information includes the package logo.

The method for updating a key in a multimedia broadcast system according to any one of claims 1 to 4, wherein the NAF stores a package identifier of each package, and a service identifier of all services included in each package. The corresponding relationship between the package identifier and the service key corresponding to the service included in each package, and the NAF encapsulates the service key of all services in the package in the key package according to the service key request message.

The method for updating a key in a multimedia broadcast system according to claim 5, wherein the NAF performs all services in the package according to the service key request message. The service key is encapsulated in the key package, and the NAF queries the service identifier of all services included in the corresponding package and the service key corresponding to each service identifier according to the package identifier in the received service key request message. And encapsulating all the service keys that are queried in a key package; wherein the package identifier is an identifier corresponding to a single package, the service identifier is a unique identifier corresponding to one service, and one service corresponds to a service key key.

A key update device in a multimedia broadcast system, comprising: a receiving module, configured to receive a service key request message that is sent by a terminal and includes a package identifier of the terminal subscription package;

An encapsulating module, configured to encapsulate a service key of all services in the package in a key package according to a package identifier in a service key request message received by the receiving module;

The device for key update in a multimedia broadcast system according to claim 7, wherein the device further comprises: a key update module, configured to update a service key of the NAF, and send the message via the short message gateway and the short message. The center sends a service key update notification message with the package identifier to the terminal.

The key update apparatus in the multimedia broadcast system according to claim 7 or 8, wherein the terminal is configured to: after receiving the service key update notification message with the package identifier, according to the The package identifier generates a corresponding service key request message and sends the message to the receiving module via the WAP gateway.