CN101202936B - Method, system realizing RRC signal order integrality protection referring to SRNS relocation and wireless network controller - Google Patents
Method, system realizing RRC signal order integrality protection referring to SRNS relocation and wireless network controller Download PDFInfo
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Abstract
The invention discloses a method relating to the relocation of SRNS for realizing the integrity protection of RRC signaling. TRNC sends message to UE by adopting the serial number which is added with bias and the corresponding superframe number. To be more specific, the SRNC adds bias to the stored serial number and modifies the superframe number; the serial number and the superframe number are sent to the TRNC which sends message to a user terminal by the received serial number and the superframe number; or the SRNC sends the reserved serial number and the superframe number to the TRNC which adds bias to the serial number and modifies the superframe number; messages are sent to a user terminal by the serial number and the superframe number. The invention also discloses a system relating to the relocation of the SRNS for realizing the integrity protection of RRC signaling and a radio network controller. The invention can realize the sameness of the user terminal as the serial number and the superframe number of the TRNC, thereby ensuring the realization of the integrity protection in the process of the relocation of the SRNS, more particularly, the situation that the SRNC excessively sends information in the process of relocation, and further reducing words dropping.
Description
Technical field
The present invention relates to the mobile communication technology field; particularly a kind of SRNS Serving Radio Network Subsystem (Serving Radio Network Subsystem that relates to; SRNS) the realization Radio Resource of reorientation control (RadioResources Control, RRC) method of signaling integrity protection, system and radio network controller.
Background technology
(Universal Mobile Telecommunication System, basic structure UMTS) as shown in Figure 1 for universal mobile telecommunications system.Among the UMTS, user terminal (User Equipment, UE) by air interface be linked into UMTS Terrestrial radio access network (UMTS Terrestrial Radio Access Network, UTRAN).(Radio Network Subsystem RNS) forms UTRAN by one group of RNS.Each RNS comprise a radio network controller (Radio Network Controller, RNC) and one or more base stations (NodeB), the UE access network be connected to UE-NodeB-RNC-CN.
When a common UE is connected with UTRAN, only relate to one for UE provides the RNS of service, this moment, this RNS became SRNS, and the RNC among this RNS is SRNC (Serving RNC).Terminal inserts in the process of UTRAN, and SRNS can change, and promptly the SRNC of UE is converted to another RNC from a RNC, and this process is called the SRNS reorientation.Fig. 2 shows a kind of reorientation situation.As shown in the figure, UE initially inserts SRNC, is connected to CN by the IU interface between itself and the CN; UE inserts TRNC after the reorientation, by its IU interface to CN, the TRNC Target RNC (Target RNC) that promptly in repositioning process, will insert here.In the repositioning process, manage by of the access of RRC signaling to UE.
Among the UMTS, fail safe there has been higher requirement.Propose in the standard that UMTS is correlated with to adopt integral algorithm that the RRC signaling is carried out integrity protection, intercepted and captured or distort to prevent signaling, thus the safety of assurance signaling.Concrete, stipulate in the standard that transmitting terminal (RNC/UE) safeguards one group of parameter, utilize these parameters, through integral algorithm obtain a message authentication code that is used for integrity protection (MessageAuthentication Code for Integrity, MAC-I); Safeguard one group of identical parameter at receiving terminal (UE/RNC), when receiving data, use identical integral algorithm to obtain an XMAC-I (Expected Message Authentication Code for Integrity, the MAC-I of expection), compare XMAC-I and MAC-I, if identical, the transmitting-receiving that this RRC signaling then is described is complete, otherwise,, illustrate that then this transmitting-receiving is imperfect if XMAC-I and MAC-I are unequal, receiving terminal abandons the data of receiving, signaling might discharge.
Hyper Frame Number (Hyper Frame Number, HFN) and sequence number (Sequence Number SN) is two important parameters in the integrity protection.These two parameters are formed COUNT-I jointly, and this COUNT-I is used for the calculating that integral algorithm obtains MAC-I and XMAC-I.Fig. 3 shows the graph of a relation of COUNT-I and HFN and SN.As seen from the figure, COUNT-I is 32 bits, and wherein HFN is 28 bits, and SN is 4 bits.Because SN is 4 bits, therefore denotable scope is 0000-1111, and promptly 0 in the decimal system is to 15.Every increase sends or receives a piece of news, and SN adds 1 operation; When the value of SN reaches 16, overturn, add 1 promptly since 0 counting again, and to HFN.Regulation to HFN among the receiving terminal renewal COUNT-I and SN in standard is as follows:
If transmitting terminal SN1＞receiving terminal SN2 I., then receiving terminal SN2 is updated to SN1;
If transmitting terminal SN1=receiving terminal SN2 II., then receiving terminal abandons SN1;
If transmitting terminal SN1＜receiving terminal SN2 III., then receiving terminal thinks that upset has taken place transmitting terminal SN1, and receiving terminal adds 1 to HFN2, and SN2 is updated to SN1; Because receiving terminal thinks that upset has taken place transmitting terminal SN1, transmitting terminal has done to add 1 operation to HFN1 in this regulation, and then receiving terminal need add 1 operation to the HFN2 that self preserves in order to keep consistent with the HFN1 value of transmitting terminal.
Like this, the regulation assurance receiving terminal in the standard is consistent with HFN and SN among the COUNT-I of transmitting terminal, thereby obtains MAC+1, XMAC-I, and then realizes integrity protection.
In the prior art, standard has proposed a kind of method of realization RRC signaling integrity protection of the SRNS of relating to reorientation, promptly is not have under the situation of activationary time, and up-to-date HFN and the SN of SRB that SRNC is preserved directly inserts among the Container.Fig. 4 shows this process.
Step 401:SRNC is with the HFN that preserves, and information such as SN are inserted in the container (Container) of RRC definition, and this Container is sent to TRNC.
At this moment, the relevant parameter of preserving among the UE is identical with SRNC, also is HFN and SN.
Step 402:SRNC sends a physical channel and reshuffles (Physical Channel Reconfiguration) message to UE, and UE adds 1 with SN thereupon, is SN+1.
Described physical channel reconfiguration message is wanted the relevant configuration information of the TRNC of reorientation in order to notice UE.
Step 403: after the reorientation success, the SN that TRNC will receive and preserve adds 1, is SN+1, and begins the issuing message to UE.Consider just in this step that SRNC also will send a configuration messages to UE, TRNC just adds 1 with SN.Like this, TRNC and UE preserve is all HFN and SN+1, and the value of then utilizing identical integral algorithm to obtain is identical, has therefore realized the integrity protection of this process.
But, if the physical channel reconfiguration message that causes SRNC to issue UE in step 402 is for a certain reason lost, need resend, and/or, between step 402 and step 403, CN might need by one or some message of SRNC transmission to UE, if such message bar number is ReTx, then the SN of UE becomes SN+ReTx thereupon, like this, and in step 403, SN+1 and the SN+ReTx among the UE among the TRNC do not wait, and under the situation of the SN+ReTx among the UE greater than the SN+1 among the TRNC, according to the regulation III in the aforementioned standard, UE judges that upset has taken place the SN among the TRNC.For example the SN among the UE is 14, and the SN among the TRNC is 1, and then UE thinks that SN among the TRNC is 1 is because the SN of TRNC is increased to 17, has promptly reached maximum 16, and counting just obtaining result 1 again, and the HFN of TRNC carried out adding 1 and operate, and is HFN+1.So, UE also adds 1 in order to keep identical with HFN among the TRNC to the HFN that self preserves, and promptly be HFN+1 among the UE, and the SN+ReTx of self preservation is updated to SN+1.But by as can be known aforementioned, the HFN among the TRNC does not add 1, is still HFN; like this; be HFN this moment among the TRNC, and SN+1 is HFN+1 among the UE; SN+1; unequal by MAC+1, XMAC-I value that integral algorithm obtains, according to the operation of integrity protection, receiving terminal UE abandons the follow-up data of receiving; signaling discharges, final call drop.
Summary of the invention
The method, system and the radio network controller that the purpose of this invention is to provide a kind of realization RRC signaling integrity protection of the SRNS of relating to reorientation; to overcome in the prior art owing to do not consider that the SRNS resend message causes the shortcoming of call drop under the situation of UE in the SRNS repositioning process according to the operation of integrity protection.
For solving the problems of the technologies described above, the method, system and the radio network controller that the invention provides a kind of realization RRC signaling integrity protection of the SRNS of relating to reorientation are achieved in that
A kind of method that relates to the realization radio resource control signaling integrity protection of SRNS Serving Radio Network Subsystem reorientation; it is characterized in that; target radio network controller adopts the sequence number and the corresponding with it Hyper Frame Number that increase biasing to send message to user terminal; wherein; the bias that increases rule of thumb is worth and preestablishes; this empirical value is not less than service wireless network controller is issued the message of user terminal in the SRNS Serving Radio Network Subsystem repositioning process bar number, and is not more than the number of the maximum that sequence number can represent.
Service wireless network controller increases the sequence number of preserving biasing and Hyper Frame Number is made change, and this sequence number and Hyper Frame Number are sent to target radio network controller;
Sequence number and Hyper Frame Number that the target radio network controller utilization is received send a message to user terminal.
Service wireless network controller sends to target radio network controller with sequence number and the Hyper Frame Number of preserving;
Target radio network controller increases the sequence number of receiving biasing and Hyper Frame Number is made change, utilizes this sequence number and Hyper Frame Number to send a message to user terminal.
By following mode Hyper Frame Number is made change:
If sequence number overturns when increasing biasing, described Hyper Frame Number is added 1;
If sequence number overturns when increasing biasing, described Hyper Frame Number remains unchanged.
A kind of system that relates to the realization radio resource control signaling integrity protection of SRNS Serving Radio Network Subsystem reorientation comprises service wireless network controller, target radio network controller, user terminal, wherein,
The sequence number that service wireless network controller is used for preserving increases biasing and Hyper Frame Number is made change, this sequence number and Hyper Frame Number are sent to target radio network controller, wherein, the bias that increases rule of thumb is worth and preestablishes, this empirical value is not less than service wireless network controller is issued the message of user terminal in the SRNS Serving Radio Network Subsystem repositioning process bar number, and is not more than the number of the maximum that sequence number can represent;
Target radio network controller is used to utilize sequence number and the Hyper Frame Number received to send a message to user terminal.
Described service wireless network controller comprises that sequence number increases bias unit, Hyper Frame Number change unit and transmitting element, wherein,
The sequence number that sequence number increase bias unit is used for preserving increases biasing;
Hyper Frame Number change unit is used for increasing the situation change Hyper Frame Number that upset takes place when setovering according to sequence number;
Transmitting element is used for sequence number and Hyper Frame Number are sent to target radio network controller.
A kind of radio network controller that relates to the realization radio resource control signaling integrity protection of SRNS Serving Radio Network Subsystem reorientation; this radio network controller is the service wireless network controller in the described repositioning process; comprise that sequence number increases bias unit, Hyper Frame Number change unit and transmitting element; wherein
The sequence number that sequence number increase bias unit is used for preserving increases biasing, wherein, the bias that increases rule of thumb is worth and preestablishes, this empirical value is not less than service wireless network controller is issued the message of user terminal in the SRNS Serving Radio Network Subsystem repositioning process bar number, and is not more than the number of the maximum that sequence number can represent;
Hyper Frame Number change unit is used for increasing the situation change Hyper Frame Number that upset takes place when setovering according to sequence number;
Transmitting element is used for sequence number and Hyper Frame Number are sent to target radio network controller.
A kind of system that relates to the realization radio resource control signaling integrity protection of SRNS Serving Radio Network Subsystem reorientation comprises service wireless network controller, target radio network controller, user terminal, wherein,
Sequence number and Hyper Frame Number that service wireless network controller is used for preserving send to target radio network controller;
Target radio network controller increases the sequence number of receiving biasing and Hyper Frame Number is made change, utilize this sequence number and Hyper Frame Number to send a message to user terminal, wherein, the bias that increases rule of thumb is worth and preestablishes, this empirical value is not less than service wireless network controller is issued the message of user terminal in the SRNS Serving Radio Network Subsystem repositioning process bar number, and is not more than the number of the maximum that sequence number can represent.
Described target radio network controller comprises that sequence number increases bias unit, Hyper Frame Number change unit and message sending unit, wherein,
The sequence number that sequence number increase bias unit is used for preserving increases biasing;
Hyper Frame Number change unit is used for increasing the situation change Hyper Frame Number that upset takes place when setovering according to sequence number;
Message sending unit is used to utilize sequence number and Hyper Frame Number to send a message to user terminal.
A kind of radio network controller that relates to the realization radio resource control signaling integrity protection of SRNS Serving Radio Network Subsystem reorientation; this radio network controller is the target radio network controller in the described repositioning process; comprise that sequence number increases bias unit, Hyper Frame Number change unit and message sending unit; wherein
The sequence number that sequence number increase bias unit is used for preserving increases biasing, wherein, the bias that increases rule of thumb is worth and preestablishes, this empirical value is not less than service wireless network controller is issued the message of user terminal in the SRNS Serving Radio Network Subsystem repositioning process bar number, and is not more than the number of the maximum that sequence number can represent;
Hyper Frame Number change unit is used for increasing the situation change Hyper Frame Number that upset takes place when setovering according to sequence number;
Message sending unit is used to utilize sequence number and Hyper Frame Number to send a message to user terminal.
By above technical scheme provided by the invention as seen; to increase the SN and the corresponding with it HFN that setover by SRNC in the repositioning process and send to TRNC; or; SRNC transmission SN and HFN are to TRNC; by TRNC SN is increased biasing and HFN is made corresponding change; afterwards; TRNC adopts the SN and the corresponding with it HFN that increase biasing to send message to UE; make the UE can be identical with SN and the HFN of TRNC; better guaranteed the realization of the integrity protection in the repositioning process; especially the situation of the multiple message of SRNC in the repositioning process, and then reduced call drop.
Description of drawings
Fig. 1 is the structure chart of UMTS in the prior art;
Fig. 2 is the state diagram before and after a kind of reorientation in the prior art;
Fig. 3 is the graph of a relation of COUNT-I and HFN and SN;
Fig. 4 is divided into Fig. 4 a, Fig. 4 b, Fig. 4 c for for a kind of procedure chart that relates to the realization RRC signaling integrity protection of SRNS reorientation in the prior art;
Fig. 5 is the complete procedure of UE access network to a kind of situation of finishing reorientation;
Fig. 6 is for realizing concrete content planning figure in the special parameter;
Fig. 7 is the frame diagram of an embodiment of system of the present invention;
Fig. 8 is the frame diagram of another embodiment of system of the present invention.
Embodiment
Core of the present invention provides a kind of method of realization RRC signaling integrity protection of the SRNS of relating to reorientation, and is concrete, TRNC adopt to increase the SN of biasing (Offset) and with it the mode of the HFN of correspondence send message to UE.Implementation method can be to send to TRNC after SRNC increases a biasing with SN, is about to SN+Offset and sends to TRNC, and also can be that SRNC will send to TRNC by SN, and TRNC be updated to SN+Offset with SN.Upset situation when simultaneously, increasing biasing according to SN is done corresponding adjustment to the value of HFN.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
Consider the SRNC UE that in repositioning process, will transmit control message, and this message can be one or more of, for example the control messages that sends owing to SRNC is lost the transmission that repeats that causes in repositioning process, then can after TRNC when beginning to send message to UE, the SN that TRNC is adopted increase biasing (Offset) and with it the mode of the HFN of correspondence send message to UE.This Offset value can rule of thumb pre-determine, generally speaking, SRNC can not be too big to the number of times ReTx of UE resend message, can achieve the goal as long as therefore make Offset be not less than ReTx, and overturn more than taking place once, the value of setting Offset is less than 15.To achieve these goals, concrete, following two kinds of embodiment can be arranged.
Steps A: if SN does not overturn after adding Offset, i.e. SN+Offset＞SN, then SRNC inserts SN+Offset and HFN and sends to TRNC among the Container.
If SN overturns after adding Offset, promptly cause SN+Offset＜SN, then SRNC inserts SN+Offset and HFN+1 and sends to TRNC among the Container.
In this step, the value of HFN need be changed with the magnitude relationship of SN+Offset and SN.
Step B:SRNC sends one or more message to UE, and UE adds ReTx with the SN that self preserves thereupon, is SN+ReTx; Wherein ReTx is the message bar number that SRNC issues UE.
Step C: after the reorientation success, TRNC utilizes the SN+Offset and the HFN (or HFN+1) that receive and preserve to send message to UE.
Below be the process of second embodiment:
Step a:SRNC inserts SN and the HFN that self preserves Container and sends this Container to TRNC.
Step b:SRNC sends one or more message to UE, and UE adds ReTx with the SN that self preserves thereupon, is SN+ReTx; Wherein ReTx is the message bar number that SRNC issues UE.
Step c: after the reorientation success, the SN that TRNC will receive and preserve adds Offset, and if SN do not overturn after adding Offset, i.e. SN+Offset＞SN, then TRNC utilizes and sends message among SN+Offset and the HFN to UE; If SN overturns after adding Offset, promptly cause SN+Offset＜SN, then TRNC renewal HFN is HFN+1, and utilizes SN+Offset and HFN+1 to send a message to UE.
After above-mentioned two kinds of embodiment carried out, that preserve among the TRNC was SN+Offset and HFN, or SN+Offset and HFN+1, then:
If SN+Offset and HFN do not overturn as can be known, by the Offset＞ReTx of front, SN+Offset＞SN+ReTx, according to aforementioned regulation I, receiving terminal UE is updated to SN+Offset, and UE and TRNC are HFN, needn't change.
That for example preserve among the TRNC is SN=12+3=15 and HFN=0, and SN does not overturn, and that receiving terminal UE preserves is SN=12+2=14 and HFN=0, and according to aforementioned regulation I, receiving terminal UE is updated to SN=15.
If that preserve among the TRNC is SN+Offset and HFN+1, upset has taken place as can be known, the situation according to UE is divided into two kinds again so:
Situation 1:UE is SN+ReTx and HFN, and promptly UE does not overturn, SN+ReTx＞SN+Offset then, and according to aforementioned regulation III, receiving terminal UE is updated to HFN+1 and the SN+Offset that receives so.
That for example preserve among the TRNC is SN=12+5=1 and HFN=0+1=1, and upset has taken place SN, and that receiving terminal UE preserves is SN=12+2=14 and HFN=0, and according to aforementioned regulation III, receiving terminal UE is updated to SN=1, HFN=1.
Situation 2:UE is SN+ReTx and HFN+1, and promptly UE also overturns, by front Offset＞ReTx, and SN+ReTx＜SN+Offset then, according to aforementioned regulation I, receiving terminal UE is updated to SN+Offset so, and UE and TRNC are HFN+1, needn't change.
That for example preserve among the TRNC is SN=12+6=2 and HFN=0+1=1, and upset has taken place SN, and that receiving terminal UE preserves is SN=12+5=1 and HFN=0+1=1, and upset has also taken place, and according to aforementioned regulation I, receiving terminal UE is updated to SN=2.
In addition, if the SN+ReTx that receiving terminal UE preserves equates that with the SN+Offset that TRNC preserves promptly ReTx equates with Offset, then handle according to aforementioned regulation II.
No matter be above-mentioned the sort of situation, can guarantee that UE is identical with the SN value with HFN among the TRNC, avoided owing to not have the consideration message number that SRNC sends out to UE in repositioning process, thereby can correctly realize the integrity protection of this process greater than 1 situation.
Provide the complete procedure of UE access network below to a kind of situation of finishing reorientation.Fig. 5 shows this process.
Step 501:UE start post-registration set up behind the network with SRNC between RRC be connected.
Step 502:UE is established to the initial direct-sending process of CN, sets up IU and connects.
Step 503:CN initiates RAB, and (Radio Access Bearer RAB) assigns, and sets up service bearer.
Step 504:CN initiates the safe mode control procedure, returns corresponding message to CN after the UE configuration is finished.
This step comprises four sub-steps:
This four sub-steps is the precondition of complete protection.
Step 505:SRNC initiates the SRNS reorientation according to the measurement report decision of receiving, sends Relocation Required message to CN, and CN sends Relocation Request message to TRNC according to this message.
UE and SRNC connect when communicating, also measure the situation be linked into other RNS, for example level, quality etc., and these measurement results are sent to SRNS by measurement report, SRNS sets certain condition, which kind of situation to have issued repositioning process with decision in.
Step 506:TRNC distributing radio resource, and return response message Relocation RequiredAcknowledge to CN.
Step 507:CN sends reorientation Relocation Command and orders SRNC.
Step 508:SRNC sends radio bearer, and (Radio Bearer, RB) control messages is to UE.
This control messages can be a Physical Channel Reconfiguration message.
Step 509:UE sends a response message to TRNC.
For example can be that UE sends response message Physical Channel Reconfiguration Complete to TRNC.
Step 510:TRNC sends reorientation and finishes (Relocation Complete) message to CN.
Step 511:CN sends IU interface release command IU Release Command to SRNC.
Step 512:SRNC carries out release procedure.
By said process as seen, at first need enable integrity protection, promptly execution in step 504.Like this, could the application of aforementioned steps A when SRNC receives measurement report decision SRNS reorientation, the method among B, C or a, b, the c, the assurance integrity protection is correctly realized.
Integrity protection in the above-mentioned repositioning process is in the RelocationRequired message in step 505 information such as HFN, SN to be inserted Container and send to TRNC (corresponding steps A/a); SRNC sends one or more control messages to UE (corresponding step B/b) in step 508; afterwards, TRNC begins to send a message to UE (corresponding step C/c).
The integrity protection information that comprises among the Container has been made regulation in existing standard.Standard considers that the information of defined can not characterize all configuration informations of integrity protection process fully; therefore; standard provides realization special parameter (Implementation specific parameters) as a supplement; but there is not concrete content planning; the present invention also proposes to fill in the content of integrity protection configuration, as shown in Figure 6:
● 1～128, totally 128, deposit key assignments (Integrity Key, IK).
● 129～144, totally 16, deposit the sign of enabling the used algorithm of integrity protection, enable which algorithm, then the relevant position is set to 1, and synchronization only has an algorithm and enables.
●145～512。145, flag bit (Bits Mask) is used for sign and whether also need fills in activationary time information:
If 1; explanation need pass to TRNC with the activationary time of each SRB of integrity protection; the order of depositing is that the up activationary time of SRB0, descending activationary time are filled out in a beginning earlier behind the flag bit, fills out SRB1 again, up/descending activationary time of SRB3 and SRB4.The concrete rule of filling in is (is example at the 145th with flag bit): the up activationary time of 146～149 (totally 4) storage SRB0, the descending activationary time of 150～153 (totally 4) storage SRB0; The 154th activationary time that begins to store SRB1 then stored the activationary time of SRB3, SRB4.
Otherwise, if 0, illustrate that the activationary time that does not need each SRB passes to Target RNC, just do not need to fill in; Target RNC just finishes to read information when judging flag bit and be 0 when receiving.Planning can transmit more information with less byte like this.
Transmit activationary time information and be primarily aimed at when initiating reorientation, SRNC receives safe mode control command more than once, the situation that new integrity protection configuration is not also enabled.For receiving the safe mode control command that CN sends for the first time, RNC enables this configuration immediately and carries out integrity protection on each SRB; For receiving the safe mode control command that CN sends the non-first time, except the SRB2 that mentioned just now, other SRB should continue to use old configuration to carry out integrity protection, arrive up to activationary time and just enable new integrity protection configuration.
Afterwards, after TRNC receives Relocation Request message in the step 505, from Container, read the relevant configuration information of integrity protection, and then TRNC is to the better complete defencive function of signaling according to the order of filling among Fig. 6.Like this, this process provides good demonstration and booster action for the realization of reorientation.
Introduce the system of the realization RRC signaling integrity protection that relates to the SRNS reorientation among the present invention below.
With preceding method A, B.The system of C correspondence comprises SRNC 71, TRNC 72 as shown in Figure 7, and UE 73, wherein,
Described SRNC 71 comprises that sequence number increases bias unit 711, Hyper Frame Number change unit 712 and transmitting element 713, wherein,
Sequence number increases bias unit 711 and links to each other with Hyper Frame Number change unit 712, and the SN that is used for preserving increases Offset.
Hyper Frame Number change unit 712 increases bias unit 711 with sequence number and links to each other, and the situation change HFN of upset takes place when being used for according to SN increase Offset.
Transmitting element 713 increases bias unit 711 with sequence number and links to each other with Hyper Frame Number change unit 712, is used for SN and HFN are sent to TRNC.
Description when Hyper Frame Number change unit 712 increases Offset according to SN in this system among the method for the situation change HFN of generation upset and aforementioned A, B, the C is similar, does not repeat them here.
The system corresponding with preceding method a, b, c comprises SRNC 81, TRNC 82 as shown in Figure 8, and UE 73, wherein,
SRNC 81 links to each other with TRNC82, and the SN and the HFN that are used for preserving send to TRNC 82;
TRNC 82 increases the SN that receives Offset and HFN is made change, utilizes this SN and super HFN to send a message to UE 73.
Described TRNC comprises that sequence number increases bias unit 821, Hyper Frame Number change unit 822 and message sending unit 823, wherein,
Sequence number increases bias unit 821 and links to each other with Hyper Frame Number change unit 822, and the SN that is used for receiving increases biasing Offset;
Hyper Frame Number change unit 822 increases bias unit 821 with sequence number and links to each other, the HFN that the situation change that takes place to overturn when being used for according to SN increase Offset is received;
Message sending unit 823 increases bias unit 821 with sequence number and links to each other with Hyper Frame Number change unit 822, also links to each other with UE73, is used to utilize SN and HFN to send a message to UE 73.
Description when Hyper Frame Number change unit 822 increases Offset according to SN in this system among the method for the situation change HFN of generation upset and aforementioned a, b, the c is similar, does not repeat them here.
By above embodiment as seen; by SRNC SN and the corresponding with it HFN that is biased sent to TRNC in the SRNS repositioning process; or; SRNC transmission SN and HFN are to TRNC; by TRNC SN is increased biasing and HFN is made corresponding change; TRNC adopts the SN and the corresponding with it HFN that increase biasing to send message to UE afterwards; make the UE can be identical with SN and the HFN of TRNC; better guaranteed the realization of the integrity protection in the repositioning process; especially the situation of the multiple message of SRNC in the repositioning process, and then reduced call drop.
Though described the present invention by embodiment, one skilled in the art will appreciate that 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 (10)
1. method that relates to the realization radio resource control signaling integrity protection of SRNS Serving Radio Network Subsystem reorientation; it is characterized in that; target radio network controller adopts the sequence number and the corresponding with it Hyper Frame Number that increase biasing to send message to user terminal; wherein; the bias that increases rule of thumb is worth and preestablishes; this empirical value is not less than service wireless network controller is issued the message of user terminal in the SRNS Serving Radio Network Subsystem repositioning process bar number, and is not more than the number of the maximum that sequence number can represent.
2. the method for claim 1 is characterized in that:
Service wireless network controller increases the sequence number of preserving biasing and Hyper Frame Number is made change, and this sequence number and Hyper Frame Number are sent to target radio network controller;
Sequence number and Hyper Frame Number that the target radio network controller utilization is received send a message to user terminal.
3. the method for claim 1 is characterized in that:
Service wireless network controller sends to target radio network controller with sequence number and the Hyper Frame Number of preserving;
Target radio network controller increases the sequence number of receiving biasing and Hyper Frame Number is made change, utilizes this sequence number and Hyper Frame Number to send a message to user terminal.
4. as claim 2 or 3 described methods, it is characterized in that, Hyper Frame Number made change by following mode:
If sequence number overturns when increasing biasing, described Hyper Frame Number is added 1;
If sequence number overturns when increasing biasing, described Hyper Frame Number remains unchanged.
5. a system that relates to the realization radio resource control signaling integrity protection of SRNS Serving Radio Network Subsystem reorientation is characterized in that, comprises service wireless network controller, target radio network controller, user terminal, wherein,
The sequence number that service wireless network controller is used for preserving increases biasing and Hyper Frame Number is made change, this sequence number and Hyper Frame Number are sent to target radio network controller, wherein, the bias that increases rule of thumb is worth and preestablishes, this empirical value is not less than service wireless network controller is issued the message of user terminal in the SRNS Serving Radio Network Subsystem repositioning process bar number, and is not more than the number of the maximum that sequence number can represent;
Target radio network controller is used to utilize sequence number and the Hyper Frame Number received to send a message to user terminal.
6. system as claimed in claim 5 is characterized in that, described service wireless network controller comprises that sequence number increases bias unit, Hyper Frame Number change unit and transmitting element, wherein,
The sequence number that sequence number increase bias unit is used for preserving increases biasing;
Hyper Frame Number change unit is used for increasing the situation change Hyper Frame Number that upset takes place when setovering according to sequence number;
Transmitting element is used for sequence number and Hyper Frame Number are sent to target radio network controller.
7. radio network controller that relates to the realization radio resource control signaling integrity protection of SRNS Serving Radio Network Subsystem reorientation; this radio network controller is the service wireless network controller in the described repositioning process; comprise that sequence number increases bias unit, Hyper Frame Number change unit and transmitting element; wherein
The sequence number that sequence number increase bias unit is used for preserving increases biasing, wherein, the bias that increases rule of thumb is worth and preestablishes, this empirical value is not less than service wireless network controller is issued the message of user terminal in the SRNS Serving Radio Network Subsystem repositioning process bar number, and is not more than the number of the maximum that sequence number can represent;
Hyper Frame Number change unit is used for increasing the situation change Hyper Frame Number that upset takes place when setovering according to sequence number;
Transmitting element is used for sequence number and Hyper Frame Number are sent to target radio network controller.
8. a system that relates to the realization radio resource control signaling integrity protection of SRNS Serving Radio Network Subsystem reorientation is characterized in that, comprises service wireless network controller, target radio network controller, user terminal, wherein,
Sequence number and Hyper Frame Number that service wireless network controller is used for preserving send to target radio network controller;
Target radio network controller increases the sequence number of receiving biasing and Hyper Frame Number is made change, utilize this sequence number and Hyper Frame Number to send a message to user terminal, wherein, the bias that increases rule of thumb is worth and preestablishes, this empirical value is not less than service wireless network controller is issued the message of user terminal in the SRNS Serving Radio Network Subsystem repositioning process bar number, and is not more than the number of the maximum that sequence number can represent.
9. system as claimed in claim 8 is characterized in that, described target radio network controller comprises that sequence number increases bias unit, Hyper Frame Number change unit and message sending unit, wherein,
The sequence number that sequence number increase bias unit is used for preserving increases biasing;
Hyper Frame Number change unit is used for increasing the situation change Hyper Frame Number that upset takes place when setovering according to sequence number;
Message sending unit is used to utilize sequence number and Hyper Frame Number to send a message to user terminal.
10. radio network controller that relates to the realization radio resource control signaling integrity protection of SRNS Serving Radio Network Subsystem reorientation; this radio network controller is the target radio network controller in the described repositioning process; comprise that sequence number increases bias unit, Hyper Frame Number change unit and message sending unit; wherein
The sequence number that sequence number increase bias unit is used for preserving increases biasing, wherein, the bias that increases rule of thumb is worth and preestablishes, this empirical value is not less than service wireless network controller is issued the message of user terminal in the SRNS Serving Radio Network Subsystem repositioning process bar number, and is not more than the number of the maximum that sequence number can represent;
Hyper Frame Number change unit is used for increasing the situation change Hyper Frame Number that upset takes place when setovering according to sequence number;
Message sending unit is used to utilize sequence number and Hyper Frame Number to send a message to user terminal.
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