CN106998550A - 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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- CN106998550A CN106998550A CN201610049584.0A CN201610049584A CN106998550A CN 106998550 A CN106998550 A CN 106998550A CN 201610049584 A CN201610049584 A CN 201610049584A CN 106998550 A CN106998550 A CN 106998550A
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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, this method include：The mobile station exhaled from initiation group receives the mobile station group root key that the mobile station storage is carried in call request message, the call request message；Validity to the mobile station group root key judges；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, then also comprising newest group of root key in the call message, so that the mobile station is updated to the mobile station group root key.The present invention can with less overhead to initiate cluster multi call mobile station carry out group root key renewal.
Description
Technical field
The present invention relates to the renewal side of cluster multi call technology, more particularly to a kind of group root key of cluster multi call
Method and device.
Background technology
At present, 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 communicated.But in the scene of practical application, it is necessary to
Some user is communicated with multiple users simultaneously, such as fireman is in fire extinguishing, and commander needs same
When to it is all participate in fire extinguishing firemans send instruction or transmission information, but these instruction, information be pin
To specific crowd, without being sent to irrelevant personnel, and these instructions and information in some scenarios
Possible need for confidentiality.
In order to support this function, LTE broadbands cluster (B-TrunC) industry alliance has set up, the connection
Leader will be responsible for standard formulation and industrial development planning of broadband cluster etc..LTE broadbands cluster is supported wide
Band data, voice cluster and multimedia cluster scheduling etc. business, be mainly used in government affairs, public safety,
The fields such as key industry, it is significant to current construction service type government and industrial application of information technology development.
Wherein, LTE broadbands cluster (B-TrunC) technical standard that China formulates introduces cluster registration, group and exhaled
Etc. function, it is possible to achieve other users of some user into group send voice, data simultaneously.It is each to move
Dynamic platform (UE) can know which group or which group itself belonged to.Because UE can be moved, therefore
UE in same group is likely distributed in the different districts of different base station.
When being exhaled when some UE in group needs initiation group and (initiating to call to the other users in same group),
Network is needed voice or data information transfer to multiple cells, so as to which all users in group can connect
Receive voice or data message.For safety, these voices or data need encryption.
A kind of common encryption method is to be set in mobile station and network side in identical group root key, group
Group call service is all encrypted according to this group of root key.But, in order to improve security, group root key is needed
To be updated with the appropriate frequency, network side can easily obtain newest group of root key after updating,
And the group root key of mobile station storage is not necessarily then newest.Thus, when a certain Mobile Origination in group
When group is exhaled, it is impossible to confirm whether the group root key of itself storage is effective, if mobile station can not quick obtaining
Newest group root key, will be unfavorable for the quick foundation that group is exhaled.
The content of the invention
Present invention solves the technical problem that being to provide the update method and dress of a kind of group root key of cluster multi call
Put, can with less overhead to initiate cluster multi call mobile station carry out group root key renewal.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of group root key of cluster multi call more
New method, including：The mobile station exhaled from initiation group receives call request message, the call request message
In carry the mobile station group root key of mobile station storage；To the effective of the mobile station group root key
Property 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 is close
Key is invalid, then also comprising newest group of root key in the call message, so that the mobile station is to institute
Mobile station group root key is stated to be updated.
Alternatively, the call message is calling received message.
Alternatively, command type domain is included in the calling received message, the command type domain is used to refer to
Show the validity of the mobile station group root key.
Alternatively, the first call property domain, first call property are included in the calling received message
Domain indicate this group exhale whether encryption enabled.
Alternatively, if first call property indicates that this group exhales encryption enabled, the calling receives
Record in additional encryption identifier field, the additional encryption identifier field is also included in message additional encryption symbol, wherein,
The mobile station is accorded with network side according to the additional encryption and newest group of root key is generated for group-calling service
Encryption key.
Alternatively, the call message is call rejection message.
Alternatively, command type domain is included in the call rejection message, the command type domain is used to refer to
Show the validity of the mobile station group root key.
Alternatively, the second call property domain, second call property are included in the call request message
Domain indicate this group exhale whether encryption enabled.
In order to solve the above problems, the embodiment of the present invention additionally provides a kind of group root key of cluster multi call
Updating device, including：Receiving module, the mobile station exhaled from initiation group receives call request message, described
The mobile station group root key of the mobile station storage is carried in call request message；Judge module, to institute
The validity for stating mobile station group root key is judged；Respond module, in response to the call request message,
Call message is sent to the mobile station, the call message indicates that the mobile station group root is close
The validity of key, if the mobile station group root key is invalid, also comprising most in the call message
New group root key, so that the mobile station is updated to the mobile station group root key.
Alternatively, the call message is calling received message.
Alternatively, command type domain is included in the calling received message, the command type domain is used to refer to
Show the validity of the mobile station group root key.
Alternatively, the first call property domain, first call property are included in the calling received message
Domain indicate this group exhale whether encryption enabled.
Alternatively, if first call property indicates that this group exhales encryption enabled, the calling receives
Record in additional encryption identifier field, the additional encryption identifier field is also included in message additional encryption symbol, wherein,
The mobile station is accorded with network side according to the additional encryption and newest group of root key is generated for group-calling service
Encryption key.
Alternatively, the call message is call rejection message.
Alternatively, command type domain is included in the call rejection message, the command type domain is used to refer to
Show the validity of the mobile station group root key.
Alternatively, the second call property domain, second call property are included in the call request message
Domain indicate this group exhale whether encryption enabled.
Compared with prior art, the technical scheme of the embodiment of the present invention has the advantages that：
In the embodiment of the present invention, the call request message (CALL that the mobile station that initiation group is exhaled is sent
REQUEST the mobile station group root key of mobile station storage is carried in), network side can be to mobile station group
The validity of root key is judged, and carries judged result in the call message for issuing mobile station,
Newest group of root key can also be carried if mobile station group root key is invalid, in call message, with
It is updated for the mobile station.Wherein, call message can be calling received message (CALL
) or call rejection message (CALL REJECT) ACCEPT.In such scheme, when being exhaled using initiation group
The call request message natively to be used and call message judge whether mobile station group root key has
Effect, and can be updated using newest group of root key when invalid, so that with less overhead
Realize the renewal of group root key.
Brief description of the drawings
Fig. 1 is the flow signal of the update method of the group root key of cluster multi call according to embodiments of the present invention
Figure；
Fig. 2 is a kind of data of the update method of the group root key of cluster multi call according to embodiments of the present invention
Flow diagram；
Fig. 3 is another number of the update method of the group root key of cluster multi call according to embodiments of the present invention
According to flow diagram；
Fig. 4 is the structured flowchart of the updating device of the group root key of cluster multi call according to embodiments of the present invention.
Embodiment
As stated in the Background Art, if the mobile station exhaled of initiation group can not the newest group root key of quick obtaining,
The quick foundation that group is exhaled will be unfavorable for.
In the prior art, mobile station is wanted to obtain the side that newest group root key generally uses group information updating
Formula, but such mode can increase the overhead of mobile station, be eated dishes without rice or wine (i.e. in the air while can also increase
Interface) overhead.
In the embodiment of the present invention, the call request message (CALL that the mobile station that initiation group is exhaled is sent
REQUEST the mobile station group root key of mobile station storage is carried in), network side can be to mobile station group
The validity of root key is judged, and carries judged result in the call message for issuing mobile station,
Newest group of root key can also be carried if mobile station group root key is invalid, in call message, with
It is updated for the mobile station.Wherein, call message can be calling received message (CALL
) or call rejection message (CALL REJECT) ACCEPT.In such scheme, when being exhaled using initiation group
The call request message natively to be used and call message judge whether mobile station group root key has
Effect, and can be updated using newest group of root key when invalid, so that with less overhead
Realize the renewal of group root key.
It is understandable to enable above-mentioned purpose, feature and beneficial effect of the invention to become apparent, with reference to
Accompanying drawing is described in detail to the specific embodiment of the present invention.
With reference to Fig. 1, the update method of the group root key of the cluster multi call of the present embodiment comprises the following steps：
Step S11, the mobile station exhaled from initiation group is received in call request message, the call request message
Carry the mobile station group root key of the mobile station storage；
Step S12, the validity to the mobile station group root key judges；
Step S13, 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 is close
Key is invalid, then also comprising newest group of root key in the call message, so that the mobile station is to institute
Mobile station group root key is stated to be updated.
Wherein, call message can be calling received message (CALL ACCEPT) or call denial
Message (CALL REJECT).Call request message, calling received message and call rejection message are to initiate
Group exhales the message for being accomplished by using originally, and the present embodiment, can be fast by the transformation to these original message
Judge whether the group root key for the mobile station storage that initiation group is exhaled is effective fastly, can also be fast if invalid
Newest group of root key is sent to mobile station to upgrade in time by fast ground.
With reference to Fig. 2, Fig. 2 shows a kind of data flow of the update method of group root key.
In step s 201, the mobile station 21 for initiating group-calling service sends call request message, the calling
The mobile station group root key of the storage of mobile station 21 is contained in request message.
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 of call request message of the structure with using in the prior art is essentially identical, only to call property domain
(call attribute) and group root key domain (E2E key) are redefined.
Wherein, call property domain (call attribute) is for indicating that this group of the initiation of mobile station 21 is exhaled
No encryption enabled.More specifically, if call property domain (call attribute) indicates that encryption is effective,
Then show：This group is asked to exhale encryption enabled；Carrying is mobile station in group root key domain (E2E key)
The mobile station group root key of 21 storages；Carrying is that this group exhales mid-term in group root key domain (E2E key)
Hope the group root key used.If call property domain (call attribute) indicates that encryption is invalid, show：
This group is asked to exhale not encryption enabled；Carrying is that mobile station 21 is deposited in group root key domain (E2E key)
The mobile station group root key of storage.
It should be noted that the structure of above-mentioned call request message is applied to the feelings that the initiation group of mobile station 21 is exhaled
Condition, if what mobile station 21 sent is end-to-end calling, the structure of the call request message can with it is existing
There is technology identical.
In step S202, network side 22 is effective to the mobile station group root key that is carried in call request
Property is judged.Specifically, can be by mobile station group root key and newest group of root key of network side 22
It is compared, if the two is identical, shows mobile station group root key effectively, 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 the calling receives
Message indicates the validity of mobile station group root key, and is also carried most when mobile station group root key is invalid
New group root key, so that mobile station 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 (are 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 (are redefined) |
| Random | Random (newly-increased) |
The structure of the calling received message and the basic phase of structure of the calling received message used in the prior art
Together, only call property domain (call attribute) and group root key domain (E2E key) are redefined,
And increased command type domain (command type) and additional encryption identifier field (Random) newly.
Wherein, command type domain (command type) is used for the validity for indicating mobile station group root key.
Specifically, when the movement carried in command type domain (command type) instruction call request message
Platform group root key is invalid, then calling in received message needs carrying group root key domain (E2E key)；Work as life
Type field (command type) is made to indicate the mobile station group root key carried in call request message effectively,
Then a group root key domain (E2E key) need not be carried in calling received message.Group root key domain (E2E key)
For recording newest group of root key.
Call property domain (call attribute) be used for indicate this group exhale whether encryption enabled.It is more specific and
Speech, if call property domain (call attribute) indicates that encryption is effective, shows：Indicate that this group is exhaled
Encryption enabled；This group exhales the group root key used newest for what is carried in group root key domain (E2E key)
The mobile station group root key carried in group root key or call request message；Indicate in calling received message
There is additional encryption identifier field (Random).If call property domain (call attribute) indicates encryption nothing
Effect, then show：Indicate that this group exhales not encryption enabled；Indicate that additional add is not present in calling received message
Close identifier field (Random).
Still further, record has additional encryption symbol, mobile station in additional encryption identifier field (Random)
21 after additional encryption symbol is received, it is possible to use newest group of root key and additional encryption symbol generation are used for
The encryption key that group is exhaled, correspondingly, network side 22 can also use identical mechanism, utilize newest group of root
Key and additional encryption symbol generation are used for the encryption key that group is exhaled, so as to what is matingly exhaled this group
Group-calling service is encrypted and decrypted.Wherein, different cells or base station can be added using different adding
Close symbol, correspondingly, also allows for different cell or base station and different group RRC is used in group-calling service
Signaling encryption key and group user face data encryption key.In order to improve security, network side can be used
Appropriate mode is updated to additional encryption symbol, when updating, as long as each cell or base station is additional
Encryption symbol is independently updated, and whole cells or base station are updated without synchronization.
Additional encryption symbol can be random value, and mobile station 21 and network side 22 can be using default suitable
Work as mechanism, according to newest group of root key and random value generation group RRC signaling encryption key and group user plane number
According to encryption key, so that the data in group-calling service to be encrypted and decrypted.Or, additional encryption symbol
Can also be the level identification (Level) for being used in TS33.401 agreements indicate key rank, TS33.401
Key generting machanism in agreement is iterated renewal to key, that is, new based on current key generation
Key, the level identification of initial key is 0, and level identification after new key is generated every time and adds 1, by
This, network side 22 have updated after encryption key, corresponding level identification can be accorded with as additional encryption and sent out
To mobile station 21 so that mobile station 21 can also be calculated and updated according to the level identification and newest group of root key
Rear group RRC signaling encryption key and group user face data encryption key, thus, 22 and mobile station 21
Can be using the group RRC signaling encryption key after updating and group user face data encryption key, to exhale group
Data in business are encrypted and decrypted.
It should be noted that the structure of above-mentioned calling received message is applied to the feelings that the initiation group of mobile station 21 is exhaled
Condition, if what mobile station 21 sent is end-to-end calling, the structure of the calling received message can with it is existing
There is technology identical.
With reference to Fig. 3, Fig. 3 shows another data flow of the update method of group root key.
In step S301, the mobile station 21 for initiating group-calling service sends call request message, the calling
The mobile station group root key of the storage of mobile station 21 is contained in request message.
Wherein, the structure of call request message is referred to the associated description in Fig. 2, repeats no more here.
In step s 302, network side 22 is to the effective of the mobile station group root key that is carried in call request
Property is judged.Specifically, can be by mobile station group root key and newest group of root key of network side 22
It is compared, if the two is identical, shows mobile station group root key effectively, if the two is different,
Show that mobile station group root key is invalid.
In step S303, network side 22 sends call rejection message, the call denial to mobile station 21
Message indicates the validity of mobile station group root key, and is also carried most when mobile station group root key is invalid
New group root key, so that mobile station updates.
Furthermore, the structure of the call rejection message in the present embodiment is as shown in table 3：
Table 3
The basic phase of structure of call rejection message of the structure of the call rejection message with using in the prior art
Together, command type domain (command type) and group root key domain (E2E key) have only been increased newly.
Wherein, command type domain (command type) is used for the validity for indicating mobile station group root key.
Specifically, when the movement carried in command type domain (command type) instruction call request message
Platform group root key is invalid, then carrying group root key domain (E2E key) is needed in call rejection message；Work as life
Type field (command type) is made to indicate the mobile station group root key carried in call request message effectively,
A group root key domain (E2E key) need not be then carried in call rejection message.Group root key domain (E2E key)
For recording newest group of root key, for when mobile station group root key is invalid, being stored to mobile station 21
Mobile station group root key is updated.
It should be noted that the structure of above-mentioned call rejection message is applied to the feelings that the initiation group of mobile station 21 is exhaled
Condition, if what mobile station 21 sent is end-to-end calling, the structure of the call rejection message can with it is existing
There is technology identical.
With reference to Fig. 4, Fig. 4 shows the updating device 400 of the group root key of the cluster multi call of the present embodiment,
Including：Receiving module 41, the mobile station 401 exhaled from initiation group receives call request message, the calling
The mobile station group root key that the mobile station 401 is stored is carried in request message；Judge module 42, it is right
The validity of the mobile station group root key is judged；Respond module 43, in response to the call request
Message, call message is sent to the mobile station 401, and the call message indicates described move
The validity of dynamic platform group root key, if the mobile station group root key is invalid, the call message
In also comprising newest group of root key, so that 401 pairs of the mobile station mobile station group root key is carried out more
Newly.
The updating device 400 of above-mentioned group of root key can be used for network side, for example, be integrated in or beyond base station
Portion is coupled to base station.The updating device 400 can be real by the way of software, hardware or software and hardware combining
It is existing.More information on the updating device 400 refers to the correlation of the update method of foregoing group of root key
Description, is repeated no more here.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment
Rapid to can be by program to instruct the hardware of correlation to complete, the program can be stored in a computer can
Read in storage medium, storage medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art,
Without departing from the spirit and scope of the present invention, it can make various changes or modifications, therefore the guarantor of the present invention
Shield scope should be defined by claim limited range.
Claims (16)
1. a kind of update method of the group root key of cluster multi call, it is characterised in that including：
The mobile station exhaled from initiation group is received to be carried in call request message, the call request message
State the mobile station group root key of mobile station storage；
Validity to the mobile station group root key judges；
In response to the call request message, call message, the calling are sent to the mobile station
Response message indicates the validity of the mobile station group root key, if the mobile station group root key is invalid,
Then also comprising newest group of root key in the call message, so that the mobile station is to the mobile station
Group root key is updated.
2. the update method of the group root key of cluster multi call according to claim 1, it is characterised in that institute
It is calling received message to state call message.
3. the update method of the group root key of cluster multi call according to claim 2, it is characterised in that institute
State and command type domain is included in calling received message, the command type domain is used to indicate the mobile station group
The validity of root key.
4. the update method of the group root key of cluster multi call according to claim 2, it is characterised in that institute
State in calling received message and include the first call property domain, the first call property domain indicates that this group is exhaled
Whether encryption enabled.
5. the update method of the group root key of cluster multi call according to claim 4, it is characterised in that if
First call property indicates that this group exhales encryption enabled, then also comprising attached in the calling received message
Plus encryption identifier field, record has additional encryption symbol in the additional encryption identifier field, wherein, the mobile station with
Network side accords with the encryption key generated with newest group of root key for group-calling service according to the additional encryption.
6. the update method of the group root key of cluster multi call according to claim 1, it is characterised in that institute
Call message is stated for call rejection message.
7. the update method of the group root key of cluster multi call according to claim 6, it is characterised in that institute
State and command type domain is included in call rejection message, the command type domain is used to indicate the mobile station group
The validity of root key.
8. the update method of the group root key of cluster multi call according to any one of claim 1 to 7, its
It is characterised by, the second call property domain, the second call property domain is included in the call request message
Indicate this group exhale whether encryption enabled.
9. a kind of updating device of the group root key of cluster multi call, it is characterised in that including：
Receiving module, the mobile station exhaled from initiation group receives call request message, the call request message
In carry the mobile station group root key of mobile station storage；
Judge module, the validity to the mobile station group root key judges；
Respond module, 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 is close
Key is invalid, then also comprising newest group of root key in the call message, so that the mobile station is to institute
Mobile station group root key is stated to be updated.
10. the updating device of the group root key of cluster multi call according to claim 9, it is characterised in that institute
It is calling received message to state call message.
11. the updating device of the group root key of cluster multi call according to claim 10, it is characterised in that
Command type domain is included in the calling received message, the command type domain is used to indicate the mobile station
The validity of group root key.
12. the updating device of the group root key of cluster multi call according to claim 10, it is characterised in that
The first call property domain is included in the calling received message, the first call property domain indicates this group
Exhale whether encryption enabled.
13. the updating device of the group root key of cluster multi call according to claim 12, it is characterised in that
Also included in encryption enabled, the calling received message if first call property indicates that this group is exhaled
Record has additional encryption symbol in additional encryption identifier field, the additional encryption identifier field, wherein, the mobile station
Accorded with network side according to the additional encryption and newest group of root key generate it is close for the encryption of group-calling service
Key.
14. the updating device of the group root key of cluster multi call according to claim 9, it is characterised in that institute
Call message is stated for call rejection message.
15. the updating device of the group root key of cluster multi call according to claim 14, it is characterised in that
Command type domain is included in the call rejection message, the command type domain is used to indicate the mobile station
The validity of group root key.
16. the updating device of the group root key of the cluster multi call according to any one of claim 9 to 15,
Characterized in that, including the second call property domain, second call property in the call request message
Domain indicate this group exhale whether encryption enabled.
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| CN107635227A (en) * | 2017-10-30 | 2018-01-26 | 中国联合网络通信集团有限公司 | A kind of group message encryption method and device |
| CN107635227B (en) * | 2017-10-30 | 2021-01-29 | 中国联合网络通信集团有限公司 | Group message encryption method and device |
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| CN106998550B (en) | 2019-12-03 |
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Inventor after: Hao Yutai Inventor before: Hao Yutai Inventor before: Deng Yun |