CN101547443B - Method for transmitting signaling and communication device - Google Patents
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- CN101547443B CN101547443B CN2008100354068A CN200810035406A CN101547443B CN 101547443 B CN101547443 B CN 101547443B CN 2008100354068 A CN2008100354068 A CN 2008100354068A CN 200810035406 A CN200810035406 A CN 200810035406A CN 101547443 B CN101547443 B CN 101547443B
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Abstract
The embodiment of the invention discloses a method for transmitting signaling in an LTE system and a communication device. The method for transmitting the signaling in the LTE system comprises the following steps that: a sender sets a marker bit of identification key type in the transmitting signaling; and the sender transmits the signaling to a receiver. By the embodiment of the invention, the signaling by private key encryption or shared key encryption can be differentiated.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of Long Term Evolution (Long TermEvolution, LTE) method for transmitting signaling and communicator in the system.
Background technology
In the further evolution after the LTE system, adopted trunk desk (Relay Station, RS) this important technology, thereby carried out multi-faceted reinforcement with regard to wireless access technology.The deployment of trunk desk can elevator system the wireless access performance, improve the covering of shadow region, (Base Station, effective covering radius BS) strengthen the specific region data rate to enlarge the base station.
In wireless communication system, all need to encrypt or integrity protection during the interface transmission aloft of data and signaling, encryption and integrity protection all need to adopt key to carry out, and key is divided into private cipher key and shared key.
At first introduce a kind of situation that adopts private cipher key.Each terminal all can be distributed a private cipher key, this private cipher key has only the terminal of use and knows with the base station of this terminal communication, data that passed between them and signaling all will be by aloft transmitting on the interface after this private key encryption more so, data that passed and signaling can only be used the terminal of private cipher key and could decipher out with the base station of this terminal communication, like this, guaranteed the fail safe of system.
Below introduce a kind of situation of sharing key.At (the Institute ofElectrical and Electronics Engineers of Institute of Electrical and Electronics Engineers, IEEE) in the 802.16j agreement, defined safety zone key (Security Zone Key, SZK), SZK be BS with one group of RS that is in identical safety zone between cipher key shared.In the 16j system, data are encrypted, signaling is done integrity protection, SZK is exactly the shared key that is used for the integrity protection of signaling.Fig. 1 has provided the principle schematic of shared key in network.As shown in fig. 1, BS and RS1, RS2, RS3 belong to same safety zone (shown in scope in the dotted line among the figure), and therefore, it adopts identical shared key SZK1.Also can be that a plurality of RS belong to same safety zone.For example the RS1 among Fig. 1, RS2 and RS3 belong to same safety zone (not being shown in broken lines among the figure).
In the 802.16j system, for there being the situation of sharing key and private cipher key simultaneously, (Connection ID CID) distinguishes sharing key and private cipher key to adopt connection identifier.CID is the sign of link of eating dishes without rice or wine in the 802.16j system, its can unique expression BS and MS or RS between user data or the path of control.The length of existing CID is generally 16bits, can be divided into Basic CID, and PrimaryManagement CID etc. manage CID, and Transport CID, professional CID such as Tunnel CID.In the system of existing employing 802.16j agreement, rely on and distribute Multicast CID to carry the shared signaling that SZK encrypts, carry the privately owned signaling of private key encryption with difference with Basic CID or Primary Management CID.
Along with the development of LTE system, also need in the LTE system, also introduce RS, and also will adopt private cipher key and shared key to data and signaling aloft interface encrypt or integrity protection.
In research and practice process to prior art, the inventor finds to exist in the prior art following problem:
Do not have the notion of CID in the LTE system, do not have other can support to distinguish the technical scheme of private cipher key and shared key yet.
Summary of the invention
The purpose of the embodiment of the invention provides method for transmitting signaling and communicator in a kind of LTE system, to realize supporting to distinguish the transmission of private cipher key and shared key.
For solving the problems of the technologies described above, the embodiment of the invention provides method for transmitting signaling and communicator in a kind of LTE system, is implemented as follows:
Method for transmitting signaling in a kind of LTE system comprises:
Transmit leg is provided with the flag bit of tagged keys type in the signaling that sends, wherein, believe in the LTE system
The encryption and decryption of order and integrity protection all are to be handled by bag data convergence protocol PDCP layer;
Transmit leg sends to the recipient with signaling.
The communicator of signaling in a kind of LTE system comprises:
Key Tpe is provided with the unit, is used for being provided with in the signaling that sends the flag bit of tagged keys type, and wherein, the encryption and decryption of signaling and integrity protection all are to be handled by bag data convergence protocol PDCP layer in the LTE system;
Transmitting element is used to send the signaling of encryption.
The communicator of signaling in a kind of LTE system comprises:
Receiving element is used to receive the signaling of sending;
The key judging unit, the flag bit that is used for increasing according to the signaling that receives is judged Key Tpe; Or also judge the shared key that adopt safety zone of living in according to the shared set of cipher key that identifies in the signaling format;
Decrypting device is used to utilize and judges that the key that obtains is decrypted described signaling, and wherein, the encryption and decryption of signaling and integrity protection all are to be handled by bag data convergence protocol PDCP layer in the LTE system.
The technical scheme that is provided by the above embodiment of the invention as seen, transmit leg is provided with the flag bit of tagged keys type in the signaling that sends, transmit leg sends to the recipient with signaling, like this, can adopt private key encryption or adopt shared secret key encryption by distinguishing signaling, in described signaling, be provided for distinguishing the shared set of cipher key of the shared key that adopts different safety zone, can also distinguish the shared set of cipher key of the shared key that adopts different safety zone.
Description of drawings
Fig. 1 is a principle schematic of sharing key in the prior art;
Fig. 2 is the signaling format figure of PDCP layer under the LTE system in the prior art;
Fig. 3 is the flow chart of the inventive method embodiment;
Fig. 4 is PDCP layer one signaling format figure among the inventive method embodiment;
Fig. 5 is another signaling format of PDCP layer figure among the inventive method embodiment;
Fig. 6 is the block diagram of communicator one embodiment of the present invention;
Fig. 7 is the block diagram of communicator one embodiment of the present invention.
Embodiment
The embodiment of the invention provides method for transmitting signaling and communicator in a kind of LTE system.
In order to make those skilled in the art person understand the present invention program better, the embodiment of the invention is described in further detail below in conjunction with drawings and embodiments.
In the LTE system encryption and decryption of signaling and integrity protection all be by the bag data convergence protocol (PacketData Convergence Protocol, PDCP) layer is handled, in the LTE system chain of command signaling format of PDCP layer can be as shown in Figure 2.As Fig. 2,3 R positions are that 3 in the PDCP layer form keep the position, and other is normal PDCP layer sequence number, for example and signaling data.Can utilize these to keep the position and identify the Key Tpe that signaling adopts.
Fig. 3 has demonstrated the flow chart of the inventive method embodiment, as scheming:
Step 301: transmit leg is provided with the flag bit of mark encryption type in the signaling that sends.
Concrete, transmit leg can utilize reservation position idle in the signaling to come the mark encryption type.
As described above among Fig. 2, in the flag bit of 3 free time in the PDCP layer signaling format one, i.e. 3 any R positions that keeps in the R position, position can be used for identifying the Key Tpe of employing.For example, as shown in Figure 4, can adopt privately owned/share that (Private/Share P/S) indicates that the Key Tpe that is adopted is to share key or private cipher key.In the example shown in Figure 4, employing be the reservation position of first free time, promptly first R position identifies the type of the key that is adopted.Certainly, also can adopt second R position or the 3rd R position to identify.
Be specifically as follows: what adopt when transmit leg is to share key, is expressed as shared signaling with regard to the sign that the P/S position equals S is set; What adopt when transmit leg is private cipher key, is expressed as privately owned signaling with regard to the sign that the P/S position equals P is set.The value of setting of P/S position can be in 0 and 1, and concrete corresponding relation is decided by standard.
In addition, under the situation that does not have idle flag bit to be utilized in the signaling, transmit leg also can increase the flag bit of tagged keys type in the signaling that sends.
Share key when adopting, and exist under the situation of a plurality of safety zones, will have a plurality of shared keys.And different shared keys is adopted in different safety zones, therefore also needs to be distinguished the different sharing key that adopts different safety zone.
Adopt shared key, and existing under the situation of a plurality of safety zones, can in PDCP layer signaling format, increase the shared set of cipher key that is used to distinguish the shared key that adopts different safety zone.The front is mentioned, and SZK is defined as being in cipher key shared between the identical safety zone RS.Here, concrete, can be as shown in Figure 5, the SZK Group field that increases a byte behind PDCP form is distinguished different SZK groups.
Step 302: transmit leg sends to the recipient with signaling.
Like this, the recipient by reading the encryption type of representing on the respective identification position, is decrypted with correct key after receiving signaling.
Concrete, be private cipher key if in signaling, identified encryption type, then the recipient can adopt private cipher key to be decrypted; If identified encryption type for sharing key in signaling, then the recipient can adopt shared key to be decrypted.For example, what the recipient can learn that transmit leg adopts according to the P/S flag bit is private cipher key or shared key, thereby adopts correct secret key decryption.Especially, if identified encryption type for sharing key in signaling, and also have the shared set of cipher key of distinguishing the shared key that adopts different safety zone in the signaling, then the recipient can adopt indicated shared privately owned group shared key is decrypted.Concrete can be that the recipient learns the SZK group that transmit leg adopts by SZK Group.
It is pointed out that above-mentioned transmit leg can comprise BS and/or RS, above-mentioned recipient can comprise BS and/or RS.
By above embodiment as seen, transmit leg is provided with the flag bit of tagged keys type in the signaling that sends, transmit leg sends to the recipient with signaling, like this, can adopt private key encryption or adopt shared secret key encryption by distinguishing signaling, in described signaling, be provided for distinguishing the shared set of cipher key of the shared key that adopts different safety zone, can also distinguish the shared set of cipher key of the shared key that adopts different safety zone.
Below introduce communicator embodiment in the LTE of the present invention system, Fig. 6 shows the block diagram of this communicator embodiment, as figure, comprising:
Key Tpe is provided with unit 601, is used for being provided with in the signaling that sends the flag bit of tagged keys type;
Transmitting element 602 is used to send signaling.
Concrete, described Key Tpe is provided with the unit can utilize reservation bit-identify Key Tpe idle in the signaling, or increases the flag bit of tagged keys type in the signaling that sends.
Described communicator can also comprise that sharing set of cipher key is provided with unit 603, is used to be provided with and shares the set of cipher key field, and described shared set of cipher key field is used to distinguish the shared key that adopt different safety zone.
Described signaling comprises the convergence protocol layer signaling.
Described communicator comprises BS and/or RS.
Below introduce the communicator embodiment of signaling in the LTE of the present invention system, Fig. 7 shows the block diagram of this communicator embodiment, as figure, comprising:
Receiving element 701 is used to receive the signaling of sending;
Described signaling comprises the convergence protocol layer signaling.
Described communicator comprises BS and/or RS.
In addition, can also in the LTE system, increase a special logic channel and come the bearing shared signaling, for example increase a relaying shared control channel (Relay Share Control Channel, RSCCH).Share when signaling sends all being carried on RSCCH, the signaling of receiving on the RSCCH channel when recipient receives is just carried out subsequent treatment with shared key.
Especially, under the situation that has a plurality of safety zones, can in the form of RSCCH, increase the shared set of cipher key that is used to distinguish the shared key that adopts different safety zone.Similar with the front, can distinguish different SZK groups in SZK Group field of increase.
Though described the embodiment of the invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (9)
1. method for transmitting signaling in the Long Term Evolution LTE system is characterized in that, comprising:
Transmit leg is provided with the flag bit of tagged keys type and is provided with in the signaling that sends shares the set of cipher key field, described shared set of cipher key field is used to distinguish the shared key that adopt different safety zone, wherein, the encryption and decryption of signaling and integrity protection all are to be handled by bag data convergence protocol PDCP layer in the LTE system;
Transmit leg sends to the recipient with signaling.
2. the method for claim 1 is characterized in that, described transmit leg is provided with the tagged keys type in the signaling that sends flag bit comprises:
Transmit leg utilizes reservation bit-identify Key Tpe idle in the signaling.
3. the method for claim 1 is characterized in that, described transmit leg is provided with the tagged keys type in the signaling that sends flag bit comprises:
Transmit leg increases the flag bit of tagged keys type in the signaling that sends.
4. as each described method in the claim 1～3, it is characterized in that described signaling comprises bag convergence protocol layer signaling.
5. the communicator of signaling transmission in the LTE system is characterized in that, comprising:
Key Tpe is provided with the unit, is used for being provided with in the signaling that sends the flag bit of tagged keys type, and wherein, the encryption and decryption of signaling and integrity protection all are to be handled by bag data convergence protocol PDCP layer in the LTE system;
Shared set of cipher key is provided with the unit, is used for signaling after Key Tpe is provided with the unit and is provided with and is provided with and shares the set of cipher key field, and described shared set of cipher key field is used to distinguish the shared key that adopt different safety zone;
Transmitting element is used to send signaling.
6. communicator as claimed in claim 5 is characterized in that, described Key Tpe is provided with reservation bit-identify Key Tpe idle in the unit by using signaling, or increases the flag bit of tagged keys type in the signaling that sends.
7. as claim 5 or 6 described communicators, it is characterized in that described signaling comprises the convergence protocol layer signaling.
8. the communicator of signaling transmission in the LTE system is characterized in that, comprising:
Receiving element is used to receive the signaling of sending;
The key judging unit, the flag bit that is used for being provided with according to the signaling that receives is judged Key Tpe; And the shared key of judging safety zone of living in employing according to the shared set of cipher key that identifies in the signaling format;
Decrypting device is used to utilize and judges that the key that obtains is decrypted described signaling, and wherein, the encryption and decryption of signaling and integrity protection all are to be handled by bag data convergence protocol PDCP layer in the LTE system.
9. communicator as claimed in claim 8 is characterized in that described signaling comprises the convergence protocol layer signaling.
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| CN2008100354068A CN101547443B (en) | 2008-03-28 | 2008-03-28 | Method for transmitting signaling and communication device |
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| CN2008100354068A CN101547443B (en) | 2008-03-28 | 2008-03-28 | Method for transmitting signaling and communication device |
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| CN101547443B true CN101547443B (en) | 2011-12-21 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6986046B1 (en) * | 2000-05-12 | 2006-01-10 | Groove Networks, Incorporated | Method and apparatus for managing secure collaborative transactions |
| CN101039180A (en) * | 2007-05-09 | 2007-09-19 | 中兴通讯股份有限公司 | Method and system for generating and transmitting key |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6986046B1 (en) * | 2000-05-12 | 2006-01-10 | Groove Networks, Incorporated | Method and apparatus for managing secure collaborative transactions |
| CN101039180A (en) * | 2007-05-09 | 2007-09-19 | 中兴通讯股份有限公司 | Method and system for generating and transmitting key |
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