CN106998550B - The update method and device of the group root key of cluster multi call - Google Patents
The update method and device of the group root key of cluster multi call Download PDFInfo
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- CN106998550B CN106998550B CN201610049584.0A CN201610049584A CN106998550B CN 106998550 B CN106998550 B CN 106998550B CN 201610049584 A CN201610049584 A CN 201610049584A CN 106998550 B CN106998550 B CN 106998550B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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Abstract
The update method and device of a kind of group root key of cluster multi call carry the mobile station group root key of the mobile station storage this method comprises: the mobile station exhaled from initiation group receives call request message in the call request message；The validity of the mobile station group root key is judged；In response to the call request message, call message is sent to the mobile station, the call message indicates the validity of the mobile station group root key, if the mobile station group root key is invalid, it include also then newest group of root key in the call message, so that the mobile station is updated the mobile station group root key.The present invention can carry out the update of group root key with lesser overhead to the mobile station for initiating cluster multi call.
Description
Technical field
The present invention relates to cluster multi call technology more particularly to the update methods and dress of a kind of group root key of cluster multi call
It sets.
Background technique
Currently, long term evolution (LTE, Long Term Evolution) system is primarily adapted for use in point-to-point communication, i.e., one
User is realized with another user by network and is communicated.But in the scene of practical application, need some user simultaneously with it is more
A user communicates, for example fireman, in fire extinguishing, commander, which needs to send to all firemans for participating in fire extinguishing simultaneously, to be referred to
Information is enabled or transmits, but these are instructed, information are for specific crowd, without being sent to irrelevant personnel, and at certain
These instructions and information may need for confidentiality under a little scenes.
In order to support this function, the broadband LTE cluster (B-TrunC) industry alliance has been set up, which is mainly responsible for
The standard formulation of broadband cluster and industrial development planning etc..The broadband LTE cluster supports wideband data, voice cluster and multimedia
The business such as colony dispatching are mainly used in the fields such as government affairs, public safety, key industry, to current construction service type government and
Industrial application of information technology development is of great significance.Wherein, the broadband LTE cluster (B-TrunC) technical standard that China formulates introduces
Cluster registration, group such as exhale at the functions, and other users of some user into group may be implemented while sending voice, data.Each shifting
Dynamic platform (UE) can know which group or which group itself belonged to.Since UE can be moved, the UE in same group may
It is distributed in the different community of different base station.
When exhaling when some UE in group needs to initiate group and (initiating calling to the other users in same group), network needs
By voice or data information transfer to multiple cells, to allow all users in group that can receive voice or data information.
For safety, these voices or data need to encrypt.
A kind of common encryption method is that identical group of root key is arranged in mobile station and network side, the group call service in group
All encrypted according to this group of root key.But, in order to improve safety, group root key needs to carry out more with the frequency appropriate
Newly, network side can easily obtain updated newest group of root key, and the group root key of mobile station storage is then not necessarily most
New.As a result, when a certain Mobile Origination group in group is exhaled, can not confirm whether the group root key of itself storage is effective, such as
Fruit mobile station can not newest group of root key of quick obtaining, the quick foundation for group will be unfavorable for exhaling.
Summary of the invention
The technical problem to be solved by the present invention is to provide the update methods and device of a kind of group root key of cluster multi call, can
The update of group root key is carried out to the mobile station for initiating cluster multi call with lesser overhead.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of update method of the group root key of cluster multi call,
Include: that the mobile station exhaled from initiation group receives call request message, carries the mobile station in the call request message and deposit
The mobile station group root key of storage；The validity of the mobile station group root key is judged；Disappear in response to the call request
Breath, Xiang Suoshu mobile station send call message, and the call message indicates the effective of the mobile station group root key
Property, it also include newest group of root key if the mobile station group root key is invalid, in the call message, for the shifting
Dynamic platform is updated the mobile station group root key.
Optionally, the call message is calling received message.
It optionally, include command type domain in the calling received message, the command type domain is used to indicate the shifting
The validity of dynamic platform group root key.
It optionally, include the first call property domain in the calling received message, the instruction of first call property domain is originally
Secondary group exhale whether encryption enabled.
Optionally, it if first call property indicates that this group exhales encryption enabled, is gone back in the calling received message
Comprising additional encryption identifier field, record has additional encryption symbol in the additional encryption identifier field, wherein the mobile station and network lateral root
The encryption key for being used for group-calling service is generated according to additional encryption symbol and newest group of root key.
Optionally, the call message is call rejection message.
It optionally, include command type domain in the call rejection message, the command type domain is used to indicate the shifting
The validity of dynamic platform group root key.
It optionally, include the second call property domain in the call request message, the instruction of second call property domain is originally
Secondary group exhale whether encryption enabled.
To solve the above-mentioned problems, the embodiment of the invention also provides a kind of more new clothes of the group root key of cluster multi call
It sets, comprising: receiving module, the mobile station exhaled from initiation group receive call request message, carry in the call request message
The mobile station group root key of the mobile station storage；Judgment module judges the validity of the mobile station group root key；
Respond module, in response to the call request message, Xiang Suoshu mobile station sends call message, the call message
The validity of the mobile station group root key is indicated, if the mobile station group root key is invalid, in the call message
It include also newest group of root key, so that the mobile station is updated the mobile station group root key.
Optionally, the call message is calling received message.
It optionally, include command type domain in the calling received message, the command type domain is used to indicate the shifting
The validity of dynamic platform group root key.
It optionally, include the first call property domain in the calling received message, the instruction of first call property domain is originally
Secondary group exhale whether encryption enabled.
Optionally, it if first call property indicates that this group exhales encryption enabled, is gone back in the calling received message
Comprising additional encryption identifier field, record has additional encryption symbol in the additional encryption identifier field, wherein the mobile station and network lateral root
The encryption key for being used for group-calling service is generated according to additional encryption symbol and newest group of root key.
Optionally, the call message is call rejection message.
It optionally, include command type domain in the call rejection message, the command type domain is used to indicate the shifting
The validity of dynamic platform group root key.
It optionally, include the second call property domain in the call request message, the instruction of second call property domain is originally
Secondary group exhale whether encryption enabled.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantages that
In the embodiment of the present invention, carried in the call request message (CALL REQUEST) that the mobile station that initiation group is exhaled issues
There is the mobile station group root key of mobile station storage, network side can judge the validity of mobile station group root key, and
It issues in the call message of mobile station and carries judging result, if mobile station group root key is invalid, call message
In can also carry newest group of root key, so that the mobile station is updated.Wherein, call message can be calling and connect
By message (CALL ACCEPT) or call rejection message (CALL REJECT).It is original when being exhaled using initiation group in above scheme
The call request message that will use and call message judge whether mobile station group root key is effective, and can be in nothing
It is updated when effect using newest group of root key, to realize the update of group root key with lesser overhead.
Detailed description of the invention
Fig. 1 is the flow diagram of the update method of the group root key of cluster multi call according to an embodiment of the present invention；
Fig. 2 is a kind of data flow signal of the update method of the group root key of cluster multi call according to an embodiment of the present invention
Figure；
Fig. 3 is another data flow signal of the update method of the group root key of cluster multi call according to an embodiment of the present invention
Figure；
Fig. 4 is the structural block diagram of the updating device of the group root key of cluster multi call according to an embodiment of the present invention.
Specific embodiment
As stated in the background art, if the mobile station exhaled of initiation group can not newest group of root key of quick obtaining, will be unfavorable
The quick foundation of Yu Zuhu.
In the prior art, mobile station is wanted to obtain the mode that newest group of root key generallys use group information updating, still
Such mode will increase the overhead of mobile station, while also will increase the overhead of (i.e. air interface) of eating dishes without rice or wine.
In the embodiment of the present invention, carried in the call request message (CALL REQUEST) that the mobile station that initiation group is exhaled issues
There is the mobile station group root key of mobile station storage, network side can judge the validity of mobile station group root key, and
It issues in the call message of mobile station and carries judging result, if mobile station group root key is invalid, call message
In can also carry newest group of root key, so that the mobile station is updated.Wherein, call message can be calling and connect
By message (CALL ACCEPT) or call rejection message (CALL REJECT).It is original when being exhaled using initiation group in above scheme
The call request message that will use and call message judge whether mobile station group root key is effective, and can be in nothing
It is updated when effect using newest group of root key, to realize the update of group root key with lesser overhead.
It is understandable to enable above-mentioned purpose of the invention, feature and beneficial effect to become apparent, with reference to the accompanying drawing to this
The specific embodiment of invention is described in detail.
With reference to Fig. 1, the update method of the group root key of the cluster multi call of the present embodiment includes the following steps:
Step S11, the mobile station exhaled from initiation group receive call request message, carry in the call request message
State the mobile station group root key of mobile station storage；
Step S12 judges the validity of the mobile station group root key；
Step S13, in response to the call request message, Xiang Suoshu mobile station sends call message, the calling
Response message indicates the validity of the mobile station group root key, if the mobile station group root key is invalid, the calling is rung
It answers also comprising newest group of root key in message, so that the mobile station is updated the mobile station group root key.
Wherein, call message can be calling received message (CALL ACCEPT) or call rejection message (CALL
REJECT).Call request message, calling received message and call rejection message are that initiation group is exhaled originally with regard to needing what is used to disappear
Breath, the present embodiment can rapidly judge the group root for the mobile station storage that initiation group is exhaled by the transformation to these original message
Whether key is effective, if in vain, newest group of root key rapidly can also be sent to mobile station to timely update.
With reference to Fig. 2, Fig. 2 shows a kind of data flows of the update method of group root key.
In step s 201, the mobile station 21 for initiating group-calling service issues call request message, in the call request message
Contain the mobile station group root key of the storage of mobile station 21.
Furthermore, the structure of the call request message in the present embodiment is as shown in table 1:
Table 1
The structure of the call request message includes multiple cells, and each cell has corresponding type or reference, the structure
It is essentially identical with the structure of the call request message used in the prior art, only to call property domain (call attribute) and
Group root key domain (E2E key) redefines.
Wherein, this group that call property domain (call attribute) is used to indicate the initiation of mobile station 21 exhales whether enable
Encryption.More specifically, if call property domain (call attribute) instruction encryption effectively, shows: requesting this group
Exhale encryption enabled；What is carried in group root key domain (E2E key) is the mobile station group root key that mobile station 21 stores；Group root key
What is carried in domain (E2E key) is that this group exhales the middle group root key for it is expected to use.If call property domain (call
Attribute) instruction encryption is invalid, then shows: this group being requested to exhale not encryption enabled；It is held in group root key domain (E2E key)
What is carried is the mobile station group root key that mobile station 21 stores.
It should be noted that the structure of above-mentioned call request message is suitable for the case where 21 initiation group of mobile station is exhaled, if
What mobile station 21 issued is end-to-end calling, then the structure of the call request message can be identical with the prior art.
In step S202, network side 22 sentences the validity of the mobile station group root key carried in call request
It is disconnected.Specifically, mobile station group root key can be compared with newest group of root key of network side 22, if the two phase
Together, then show that mobile station group root key is effective, if the two is different, show that mobile station group root key is invalid.
In step S203, network side 22 sends calling received message to mobile station 21, and calling received message instruction moves
The validity of dynamic platform group root key, and newest group of root key is also carried when mobile station group root key is invalid, for mobile station
It updates.
Furthermore, the structure of the calling received message in the present embodiment is as shown in table 2:
Table 2
| Cell | Type/reference |
| Protocol discriminator | Protocol discriminator |
| Spare half octet | Spare half octet |
| Trunking Procedure transaction identity | Trunking Procedure transaction identity |
| CALL Accept message identity | Message Type |
| Call ID | Call ID |
| Call Type | Call Type |
| Call Attribute | Call Attribute (is redefined) |
| Priority | Priority |
| Floor Status | Floor Status |
| Audio Description | Audio Description |
| Video Description | Video Description |
| Command type | Command type (newly-increased) |
| E2E key | E2E Key (is redefined) |
| Random | Random (newly-increased) |
The structure of the calling received message and the structure of the calling received message used in the prior art are essentially identical, only right
Call property domain (call attribute) and group root key domain (E2E key) redefine, and have increased command type domain newly
(command type) and additional encryption identifier field (Random).
Wherein, command type domain (command type) is used to indicate the validity of mobile station group root key.Specifically,
When the mobile station group root key carried in command type domain (command type) instruction call request message is invalid, then calling connects
By needing to carry a group root key domain (E2E key) in message；When command type domain (command type) instruction call request disappears
The mobile station group root key carried in breath is effective, then calls in received message and do not need carrying group root key domain (E2E key).Group
Root key domain (E2E key) is for recording newest group of root key.
Call property domain (call attribute) be used to indicate this group exhale whether encryption enabled.More specifically, such as
Fruit call property domain (call attribute) instruction encryption effectively, then shows: indicating that this group exhales encryption enabled；This group is exhaled
The group root key used is to carry in the newest group of root key or call request message carried in group root key domain (E2E key)
Mobile station group root key；There are additional encryption identifier field (Random) in instruction calling received message.If call property domain
(call attribute) instruction encryption is invalid, then shows: indicating that this group exhales not encryption enabled；In instruction calling received message
There is no additional encryption identifier field (Random).
Still further, record has additional encryption symbol in additional encryption identifier field (Random), and mobile station 21 is receiving
After additional encryption symbol, it can use newest group of root key and additional encryption symbol generate the encryption key exhaled for group, correspondingly,
Network side 22 can also use identical mechanism, and it is close that the encryption exhaled for group is generated using newest group of root key and additional encryption symbol
Key, the group-calling service so as to matingly exhale this group are encrypted and decrypted.Wherein, different cells or base station can be with
It is accorded with using different additional encryptions, correspondingly, also allows for different cell or base station in group-calling service using different groups
RRC signaling encryption key and group user face data encryption key.In order to improve safety, network side can use mode appropriate
Additional encryption symbol is updated, when updating, as long as each cell or the additional encryption of base station symbol are independently updated, nothing
It need to synchronize and whole cells or base station are updated.
Additional encryption symbol can be random value, and mobile station 21 and network side 22 can use preset appropriate mechanism, root
According to newest group of root key and random value generation group RRC signaling encryption key and group user face data encryption key, to exhale industry to group
Data in business are encrypted and decrypted.Alternatively, additional encryption symbol is also possible to be used to indicate key in TS33.401 agreement
The level identification (Level) of rank, the key generting machanism in TS33.401 agreement are iterated update, that is, base to key
New key is generated in current key, the level identification of initial key is 0, and level identification adds after generating new key every time
1, after network side 22 has updated encryption key as a result, mobile station can be issued using corresponding level identification as additional encryption symbol
21, so that mobile station 21 can also be close according to the level identification and updated group of RRC signaling encryption of newest group of root key calculating
Key and group user face data encryption key, as a result, 22 and mobile station 21 can using updated group of RRC signaling encryption key and
Group user face data encryption key, the data in group-calling service to be encrypted and decrypted.
It should be noted that the structure of above-mentioned calling received message is suitable for the case where 21 initiation group of mobile station is exhaled, if
What mobile station 21 issued is end-to-end calling, then the structure of the calling received message can be identical with the prior art.
Another data flow of the update method of group root key is shown with reference to Fig. 3, Fig. 3.
In step S301, the mobile station 21 for initiating group-calling service issues call request message, in the call request message
Contain the mobile station group root key of the storage of mobile station 21.
Wherein, the structure of call request message is referred to the associated description in Fig. 2, and which is not described herein again.
In step s 302, network side 22 sentences the validity of the mobile station group root key carried in call request
It is disconnected.Specifically, mobile station group root key can be compared with newest group of root key of network side 22, if the two phase
Together, then show that mobile station group root key is effective, if the two is different, show that mobile station group root key is invalid.
In step S303, network side 22 sends call rejection message to mobile station 21, and call rejection message instruction moves
The validity of dynamic platform group root key, and newest group of root key is also carried when mobile station group root key is invalid, for mobile station
It updates.
Furthermore, the structure of the call rejection message in the present embodiment is as shown in table 3:
Table 3
The structure of the call rejection message and the structure of the call rejection message used in the prior art are essentially identical, only newly
Command type domain (command type) and group root key domain (E2E key) are increased.
Wherein, command type domain (command type) is used to indicate the validity of mobile station group root key.Specifically,
When the mobile station group root key carried in command type domain (command type) instruction call request message is invalid, then calling is refused
Need to carry a group root key domain (E2E key) in exhausted message；When command type domain (command type) instruction call request disappears
The mobile station group root key carried in breath is effective, then carrying group root key domain (E2E key) is not needed in call rejection message.Group
Root key domain (E2E key) is for recording newest group of root key, for being deposited to mobile station 21 when mobile station group root key is invalid
The mobile station group root key of storage is updated.
It should be noted that the structure of above-mentioned call rejection message is suitable for the case where 21 initiation group of mobile station is exhaled, if
What mobile station 21 issued is end-to-end calling, then the structure of the call rejection message can be identical with the prior art.
The updating device 400 of the group root key of the cluster multi call of the present embodiment is shown with reference to Fig. 4, Fig. 4, comprising: receive
Module 41, the mobile station 401 exhaled from initiation group receive call request message, carry the movement in the call request message
The mobile station group root key that platform 401 stores；Judgment module 42 judges the validity of the mobile station group root key；It rings
Module 43 is answered, in response to the call request message, Xiang Suoshu mobile station 401 sends call message, the call
Message indicates the validity of the mobile station group root key, if the mobile station group root key is invalid, the call disappears
It include also newest group of root key in breath, so that the mobile station 401 is updated the mobile station group root key.
The updating device 400 of above-mentioned group of root key can be used for network side, such as is integrated in or beyond the base station and is coupled to
Base station.The updating device 400 can be realized by the way of software, hardware or software and hardware combining.About the updating device 400
More information refers to the associated description of the update method of aforementioned group of root key, and which is not described herein again.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium may include: ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (16)
1. a kind of update method of the group root key of cluster multi call characterized by comprising
The mobile station exhaled from initiation group receives call request message, and the mobile station storage is carried in the call request message
Mobile station group root key；
The validity of the mobile station group root key is judged；
In response to the call request message, Xiang Suoshu mobile station sends call message, the call message instruction
The validity of the mobile station group root key is also wrapped in the call message if the mobile station group root key is invalid
Containing newest group of root key, so that the mobile station is updated the mobile station group root key；Wherein, the call disappears
Breath receives message or call rejection message for calling, and the calling receives message or call rejection message includes command type
Domain, the command type domain are used to indicate the validity of mobile station group root key.
2. the update method of the group root key of cluster multi call according to claim 1, which is characterized in that the call
Message is calling received message.
3. the update method of the group root key of cluster multi call according to claim 2, which is characterized in that the calling receives
It include command type domain in message, the command type domain is used to indicate the validity of the mobile station group root key.
4. the update method of the group root key of cluster multi call according to claim 2, which is characterized in that the calling receives
In message include the first call property domain, first call property domain indicate this group exhale whether encryption enabled.
5. the update method of the group root key of cluster multi call according to claim 4, which is characterized in that if described first exhales
It makes attribute indicate that this group exhales encryption enabled, then also includes additional encryption identifier field in the calling received message, described add adds
Record has additional encryption symbol in close identifier field, wherein the mobile station and network side is accorded with according to the additional encryption and newest group of root
Key generates the encryption key for being used for group-calling service.
6. the update method of the group root key of cluster multi call according to claim 1, which is characterized in that the call
Message is call rejection message.
7. the update method of the group root key of cluster multi call according to claim 6, which is characterized in that the call denial
It include command type domain in message, the command type domain is used to indicate the validity of the mobile station group root key.
8. the update method of the group root key of cluster multi call according to any one of claim 1 to 7, which is characterized in that
It include the second call property domain in the call request message, second call property domain indicates that this group exhales whether to enable and adds
It is close.
9. a kind of updating device of the group root key of cluster multi call characterized by comprising
Receiving module, the mobile station exhaled from initiation group receive call request message, carry in the call request message described
The mobile station group root key of mobile station storage；
Judgment module judges the validity of the mobile station group root key；
Respond module, in response to the call request message, Xiang Suoshu mobile station sends call message, the call
Message indicates the validity of the mobile station group root key, if the mobile station group root key is invalid, the call disappears
It include also newest group of root key in breath, so that the mobile station is updated the mobile station group root key；Wherein, described to exhale
Response message is made to receive message or call rejection message for calling, it includes life that the calling, which receives message or call rejection message,
Type field is enabled, the command type domain is used to indicate the validity of mobile station group root key.
10. the updating device of the group root key of cluster multi call according to claim 9, which is characterized in that the calling is rung
Answer message for calling received message.
11. the updating device of the group root key of cluster multi call according to claim 10, which is characterized in that the calling connects
By including command type domain in message, the command type domain is used to indicate the validity of the mobile station group root key.
12. the updating device of the group root key of cluster multi call according to claim 10, which is characterized in that the calling connects
By in message include the first call property domain, first call property domain indicate this group exhale whether encryption enabled.
13. the updating device of the group root key of cluster multi call according to claim 12, which is characterized in that if described first
Call property indicates that this group exhales encryption enabled, then also includes additional encryption identifier field in the calling received message, described additional
Record has additional encryption symbol in encryption identifier field, wherein the mobile station and network side accord with and newest group according to the additional encryption
Root key generates the encryption key for being used for group-calling service.
14. the updating device of the group root key of cluster multi call according to claim 9, which is characterized in that the calling is rung
Answering message is call rejection message.
15. the updating device of the group root key of cluster multi call according to claim 14, which is characterized in that the calling is refused
It include command type domain in exhausted message, the command type domain is used to indicate the validity of the mobile station group root key.
16. the updating device of the group root key of cluster multi call according to any one of claims 9 to 15, feature exist
In comprising the second call property domain in the call request message, whether second call property domain indicates that this group is exhaled and open
With encryption.
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| CN101136742A (en) * | 2007-04-09 | 2008-03-05 | 中兴通讯股份有限公司 | Packet key synchronization, updating, and calibration method |
| CN103634744A (en) * | 2012-08-22 | 2014-03-12 | 北京信威通信技术股份有限公司 | Cluster group call end-to-end encryption realization method |
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| CN101022608A (en) * | 2006-02-15 | 2007-08-22 | 中兴通讯股份有限公司 | CDMA standard group system key distributuion and dynamic updating method |
| CN101136742A (en) * | 2007-04-09 | 2008-03-05 | 中兴通讯股份有限公司 | Packet key synchronization, updating, and calibration method |
| CN103634744A (en) * | 2012-08-22 | 2014-03-12 | 北京信威通信技术股份有限公司 | Cluster group call end-to-end encryption realization method |
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Inventor after: Hao Yutai Inventor before: Hao Yutai Inventor before: Deng Yun |