CN1199394C - Method for distributing key of multi-casting business - Google Patents
Method for distributing key of multi-casting business Download PDFInfo
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- CN1199394C CN1199394C CN02116571.8A CN02116571A CN1199394C CN 1199394 C CN1199394 C CN 1199394C CN 02116571 A CN02116571 A CN 02116571A CN 1199394 C CN1199394 C CN 1199394C
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Abstract
The present invention discloses a distribution method of a key of multi-casting services. In the method, when a network multi-casting service centre (MBSC) sends multi-casting service key refresh information with a new multi-casting service enciphering key to a network service node, the network service node enciphers a new key by using the common used key for each user in the same multi-casting service group, and new refresh information of the key is formed; the network service node receives the multi-casting information, the refresh information of the key and the multi-casting service information are combined to generate combined multi-casting service information; finally the combined multi-casting service information is sent to a radio network controller (RNC) by the network service node, and the combined multicast service message is sent to a mobile terminal of the user by the radio network controller. With the proposal, the synchronization problem of multi-casting service information and key distribution is effectively solved, and the multi-casting users can reliably receive the content of the multi-casting service information.
Description
Technical field
The present invention relates to the transmission method of key of multi-casting business in the mobile communications network.
Background technology
In mobile communications network, in order to finish the transmission of specific transactions, need the mobile network decruption key of business datum to be distributed to user's portable terminal, the multicast service that provides for network (MBMS) for example, its service is paid, therefore MBMS must pass through encrypted transmission, and when the arrearage situation appearred in the user, network needed the update MBMS password to make this user can't receive multicast message., non-defaulting subscriber legal for making can receive MBMS, needs the mobile network that the decruption key of MBMS is distributed to legal, non-defaulting subscriber, changes defaulting subscriber's decruption key simultaneously, makes it can't receive MBMS.The distribution method of existing MBMS key is to set up point-to-point the connection between the portable terminal by the cipher controlled center of network side or the entity of carrying out similar functions and user, and the situation according to customer mobile terminal determines to be this user's key distribution then.The major defect of this method is, the process of issuing of MBMS key updating process and MBMS message is separate, be difficult to realize synchronously, because the key updating of MBMS and the message of MBMS are provided asynchronous, may produce user key does not so upgrade when finishing as yet, MBMS message just issues, and makes the user can't receive normal MBMS message content, thereby causes the unreliable reception of MBMS.
Summary of the invention
The object of the present invention is to provide a kind of distribution method of key of multi-casting business that can the reliable reception cast service data.
For achieving the above object, the distribution method of key of multi-casting business provided by the invention comprises:
(1) network multicast service center (MBSC) sends the key of multi-casting business updating message that has new multicast service encryption key to the Network node, the Network node is encrypted new key with same each user's of multicast service group Public key, and forms new key updating message;
(2) the Network node is received multicast service message, and key updating message and multicast service message are merged, and generates the multicast service message after merging;
(3) the multicast service message after the Network node will merge sends to radio network controller (RNC), and the multicast service message after will being merged by radio network controller sends to user's portable terminal;
(4) during the multicast service message after user's portable terminal is received merging, send to network and to have received the key confirmation message of renewal.
Described method also comprises:
Network is deleted this user after receiving the key confirmation message that customer mobile terminal sends in key updating message.
In the present invention, because Network Control Node SGSN is packaged in user cipher updating message content and multicast service MBMS message together, because each multicast service user can receive the multi-service information of merge key updating message, therefrom extract each autocorrelative key information, and multicast service message is decrypted operation with this key, like this, the user obtaining and obtaining in a piece of news of multicast service message is obtained new key, thereby efficiently solve the stationary problem of multicast service message and key distribution, compare with existing method, the present invention had both guaranteed the user key safety of transmission, made multicast users can receive the content of multicast service message reliably again.
Description of drawings
Fig. 1 is the embodiment flow chart of the method for the invention;
Fig. 2 is the method for the invention principle schematic;
Fig. 3 is the cast service data packet format figure after the merging adopted of the described embodiment of Fig. 1.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Can reliably carry out the reliable reception of multicast service message for the portable terminal that makes legal and non-arrearage multicast users, need to solve the problem of multicast service message and key updating message synchronization, for this reason, the present invention's employing merges the method for transmission with key updating message and multicast service message, thereby realizes that user cipher upgrades and the broadcast of MBMS message is carried out synchronously.As shown in Figure 2, mobile network's Network node merges key updating message and multicast service message, through the portable terminal transmission to multicast users of mobile network's wireless air interface.
Fig. 1 is the embodiment flow chart of the method for the invention.The described the present invention of being of Fig. 1 is applied to the embodiment of general packet mobile communications network (GPRS), the network entity that this example relates to is Serving GPRS Support Node (SGSN), multicast service center (MBSC), radio network controller (RNC) and netkey center, by SGSN as the Network node, certainly also can be in the reality by Gateway GPRS Support Node or MBSC as the Network node.At first multicast service center (MBSC) sends the key of multi-casting business updating message that has new multicast service encryption key to Serving GPRS Support Node (SGSN), after SGSN receives this message, obtain same each user's of multicast service group Public key from the netkey center in step 2; Then SGSN encrypts new key with above-mentioned each user's Public key in step 3, and forms new multicast message; Last SGSN merges in key updating message and the multicast service message that step 4 will generate in advance, and the multicast service message after will merging sends to radio network controller (RNC), this multicast service message sent to the portable terminal of multicast users by RNC; After the multicast service message of the portable terminal of multicast users after step 5 is received merging, received the key confirmation message of renewal to the network transmission, network is after step 6 is received the key confirmation message that customer mobile terminal sends, this user is deleted in key updating message, reducing the message packet length, thereby save Internet resources.
The portable terminal of the multicast users that above-mentioned steps 5 is carried out sends to network and has received the key confirmation message of renewal, can be accomplished in several ways, and for example does to realize when the position is upgraded at user's portable terminal, can reduce offered load as far as possible like this.
Multicast service message after above-mentioned steps 3 merges comprises: each user's sign (ID) and each user's encryption key and multicast service encrypting messages among the multicast users group, and with reference to figure 3.
Also explanation at last, the present invention can directly use under broadcast mode.
Claims (6)
1, a kind of distribution method of key of multi-casting business comprises:
(1) network multicast service center (MBSC) sends the key of multi-casting business updating message that has new multicast service encryption key to the Network node, the Network node is encrypted new key with same each user's of multicast service group Public key, and forms new key updating message;
(2) the Network node is received multicast service message, and key updating message and multicast service message are merged, and generates the multicast service message after merging;
(3) the multicast service message after the Network node will merge sends to radio network controller (RNC), and the multicast service message after will being merged by radio network controller sends to user's portable terminal;
(4) user's portable terminal is received the multicast service message after the merging, sends to network and has received the key confirmation message of renewal.
2, the distribution method of key of multi-casting business according to claim 1 is characterized in that: described method also comprises: the Network node obtains each user's Public key from the netkey center.
3, the distribution method of key of multi-casting business according to claim 1 is characterized in that: the described key confirmation message of having received renewal that sends to network is done to realize when regular position is upgraded at user's portable terminal.
4, according to the distribution method of claim 1 or 3 described key of multi-casting business, it is characterized in that: network is deleted this user after receiving the key confirmation message that customer mobile terminal sends in key updating message.
5, the distribution method of key of multi-casting business according to claim 4 is characterized in that the multicast service message after the described merging of step (2) comprises: each user's sign (ID) and each user's encryption key and multicast service encrypting messages among the multicast users group.
6, the distribution method of key of multi-casting business according to claim 5 is characterized in that: described Network node is Serving GPRS Support Node (SGSN).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02116571.8A CN1199394C (en) | 2002-04-09 | 2002-04-09 | Method for distributing key of multi-casting business |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02116571.8A CN1199394C (en) | 2002-04-09 | 2002-04-09 | Method for distributing key of multi-casting business |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1450751A CN1450751A (en) | 2003-10-22 |
| CN1199394C true CN1199394C (en) | 2005-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN02116571.8A Expired - Fee Related CN1199394C (en) | 2002-04-09 | 2002-04-09 | Method for distributing key of multi-casting business |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100403814C (en) * | 2004-11-25 | 2008-07-16 | 华为技术有限公司 | Packet broadcasting service key controlling method |
| CN100454320C (en) * | 2005-11-28 | 2009-01-21 | 华为技术有限公司 | Key management method and apparatus for digital copyright management |
| CN1845599B (en) * | 2006-05-17 | 2010-09-01 | 中国移动通信集团公司 | Method for obtaining and updating service key in mobile television service |
| CN101150467B (en) * | 2006-09-19 | 2011-12-21 | 华为技术有限公司 | Method for adding multicast and broadcast service into communication system and terminal |
| WO2008040238A1 (en) | 2006-09-19 | 2008-04-10 | Huawei Technologies Co., Ltd. | Method of terminal adding multicast broadcast service in wireless network and thereof system |
| CN101155343B (en) * | 2006-09-29 | 2012-09-05 | 华为技术有限公司 | Method and system for adding multicast broadcasting service to terminal in wireless network |
| CN100433684C (en) * | 2006-09-20 | 2008-11-12 | 华为技术有限公司 | Method, system and application server for providing broadcast multicast service |
| CN1946016B (en) * | 2006-11-08 | 2012-10-03 | 北京邮电大学 | Merging and repeating method based on cooperation diversity |
| CN101267590B (en) * | 2007-03-14 | 2013-07-31 | 中国移动通信集团公司 | Service unsubscription method and system, mobile terminal, card and service server |
| US7903540B2 (en) * | 2007-08-02 | 2011-03-08 | Alvarion Ltd. | Method and device for synchronization in wireless networks |
| CN101400057B (en) * | 2007-09-30 | 2012-01-04 | 华为技术有限公司 | Cipher key updating method, base station and mobile station |
| CN101521656B (en) * | 2008-02-26 | 2012-12-19 | 华为技术有限公司 | Method and system for updating cryptographic-key used for encrypting group service |
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2002
- 2002-04-09 CN CN02116571.8A patent/CN1199394C/en not_active Expired - Fee Related
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| CN1450751A (en) | 2003-10-22 |
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Granted publication date: 20050427 Termination date: 20130409 |