CN101588576B - A kind of method and system of system for protecting terminal privacy in wireless communication - Google Patents
A kind of method and system of system for protecting terminal privacy in wireless communication Download PDFInfo
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- CN101588576B CN101588576B CN200910202935.7A CN200910202935A CN101588576B CN 101588576 B CN101588576 B CN 101588576B CN 200910202935 A CN200910202935 A CN 200910202935A CN 101588576 B CN101588576 B CN 101588576B
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Abstract
The invention discloses a kind of method and system of system for protecting terminal privacy in wireless communication, avoid the plaintext transmission of terminal MAC address.Described method comprises: terminal initial network or network re-entry process in, base station, after receiving the ranging code that terminal sends, is that terminal specifies Temporary Mobile Station Identifier TSTID, and sends it to terminal.Described system comprises base station and terminal, wherein: described terminal, in the process of initial network entry or network re-entry, sends ranging code to described base station; And for receiving the TSTID that described base station sends; Described base station, for after the described ranging code receiving terminal transmission, is that terminal specifies Temporary Mobile Station Identifier TSTID, and sends it to terminal.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of method and system of system for protecting terminal privacy in wireless communication.
Background technology
IEEE (Institute of Electrical and Electronic Engineers, electronic motor engineering association) 802.16 standards systems are mainly for metropolitan area network, its main target is development in the wireless access system air interface physical layer (PHY) of 2 ~ 66GHz frequency band and medium access control layer (MAC) specification, also has the specification that coexists between the uniformity test relevant to air interface protocol and different radio connecting system simultaneously.
According to whether supporting mobility, IEEE 802.16 standard can be divided into fixed broadband wireless access air-interface standard and mobile broadband wireless access air-interface standard, wherein 802.16d belongs to fixed wireless access air-interface standard, pass in IEEE 802 committee in June, 2004, issue with the title of IEEE 802.16-2004.And 802.16e belongs to mobile broadband wireless access air-interface standard, pass in IEEE 802 committee in November, 2005, issue with the title of IEEE 802.16-2005.WiMAX (Worldwide Interoperability for Microwave Access, inserting of microwave worldwide interoperability certification alliance) be namely specification based on IEEE 802.16 air interface, become the wireless access wide band technology that influence power is maximum in the world at present.
Current IEEE is working out 802.16m standard.This standard is to study next step evolution path of WiMAX, target becomes next generation mobile communication technology, and submit to technology motion to become one of IMT-Advanced standard of ITU (International Telecommunication Unit, International Telecommunication Union) eventually to ITU.This standard is by existing for compatibility 802.16e specification.
System requirements documents (the System Requirement Document of 802.16m; SRD) regulation needs the privacy to terminal (AMS Privacy) to protect; namely need protection terminal MAC address (AMS MAC Address) in plaintext transmission of eating dishes without rice or wine, this address can be obtained to avoid assailant thus the privacy of threat terminal.In order to realize this goal, system description documents (the SystemDescription Document of 802.16m, SDD) define the moving station mark of two types---i.e. Temporary Mobile Station Identifier (Temporary Station ID, and formal moving station mark (Station ID TSTID), STID), two identifiers are all unique in base station range.Be that terminal is uniquely divided and is used in temporary mark terminal by base station in range finding (ranging) process that TSTID networks at terminal initial, specifically, namely terminal is in distance measurement request (AAI-RNG-REQ) message, the AMS MAC Address of oneself is reported base station, TSTID for terminal distribution is sent to terminal by base station in ranging response (AAI-RNG-RSP) message, after this interacting message just carrys out marking terminal with TSTID, until the STID for terminal distribution is distributed to terminal by base station in registration process.The transmission of STID needs protection mechanism.Then base station release TSTID, uses STID to be used for marking terminal in follow-up flow process.Base station side can safeguard { AMS MAC Address, TSTID} or { AMS MAC Address, a mapping table of STID}.Specifically can reference: 80216m-09_003r9-IEEE 802.16m System DescriptionDocument.
But the method only protects the mapping relations of AMS MAC Address and STID, still do not solve the risk that AMS MAC Address plaintext transmission is brought.Assailant can intercept and capture this address, thus forges or follow the tracks of the whereabouts of user.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method and system of system for protecting terminal privacy in wireless communication, avoids the plaintext transmission of terminal MAC address.
For solving the problems of the technologies described above; the invention provides a kind of method of system for protecting terminal privacy in wireless communication; comprise: terminal initial network or network re-entry process in; base station is after the ranging code receiving terminal transmission; for terminal specifies Temporary Mobile Station Identifier TSTID, and send it to terminal.
Further, described base station, after the initial ranging code receiving terminal transmission or switching ranging code, is that described terminal specifies TSTID.
Further, base station receives the initial ranging code not needing to carry out again correcting that terminal sends or switches after ranging code, then is terminal appointment TSTID.
Further, described TSTID is sent to terminal by the ranging response message of CDMA assignment information unit or response ranging code by base station.
Further, the terminal MAC address of oneself in a registration request message, is reported base station by terminal, and is encrypted protection to described login request message and/or terminal MAC address.
Further, the key used when encrypting described login request message is stream encryption cipher key T EK; The key used when encrypting described terminal MAC address is key-encrypting key KEK or TEK.
Further, after described terminal receives described TSTID, in one or several process following, base station and terminal use described TSTID to identify described terminal: ranging message reciprocal process, pre-authentication capability negotiation procedure, authentication and authorization operating process, three-way handshake process, registration process.
For solving the problems of the technologies described above, present invention also offers a kind of system of system for protecting terminal privacy in wireless communication, comprising base station and terminal, wherein:
Described terminal, in the process of initial network entry or network re-entry, sends ranging code to described base station; And for receiving the TSTID that described base station sends;
Described base station, for after the described ranging code receiving terminal transmission, is that terminal specifies Temporary Mobile Station Identifier TSTID, and sends it to terminal.
Further, described base station is further used for after the initial ranging code receiving terminal transmission or switching ranging code, is that described terminal specifies TSTID.
Further, described base station is further used for after the initial ranging code not needing to carry out again correcting receiving terminal transmission or switching ranging code, then is that terminal specifies TSTID.
Further, described TSTID is sent to terminal by the ranging response message of CDMA assignment information unit or response ranging code by described base station.
Further, the terminal MAC address of oneself also in a registration request message, is reported base station by described terminal, and is encrypted protection to described login request message and/or terminal MAC address.
Further, the key used during login request message described in described terminal encryption is stream encryption cipher key T EK; The key used during terminal MAC address described in described terminal encryption is key-encrypting key KEK or TEK.
Further, base station and terminal also for using described TSTID to identify described terminal in one or several process following: ranging message reciprocal process, pre-authentication capability negotiation procedure, authentication and authorization operating process, three-way handshake process, registration process.
Adopt the method for the invention, TSTID is handed down to terminal by network side in advance, for identifying this terminal, thus avoiding the plaintext transmission of terminal MAC address, improve the fail safe of network.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.
Fig. 1 is the flow chart of the embodiment of the present invention one;
Fig. 2 is the flow chart of the embodiment of the present invention two;
Fig. 3 is the flow chart of the embodiment of the present invention three.
Embodiment
Consider that terminal is, before terminal acquisition base station is its TSTID distributed, uses terminal MAC address marking terminal, can identify that the response message of oneself is issued in base station to make terminal to the main purpose of base station transmitting terminal MAC Address.Inventive concept of the present invention is that the TSTID of terminal distribution sends to terminal in advance by base station, and use this TSTID to carry out marking terminal, terminal can be identified, and the response message of oneself is issued in base station, thus avoids the plaintext transmission of terminal MAC address.
Particularly, terminal initial network or network re-entry process in, base station, after receiving the ranging code that terminal sends, is that terminal specifies TSTID, and sends it to terminal.After this in ranging message reciprocal process (distance measurement request/ranging response) and follow-up pre-authentication capability negotiation procedure, authentication and authorization operating process, three-way handshake process and registration process, marking terminal all can be carried out with this TSTID in terminal and base station, until the registration process base station STID that to be terminal distribution unique.But do not get rid of terminal and base station yet and use other mode marking terminals in above-mentioned some or certain several process, utilize the ranging code that sent by terminal and the ranging slot residing for this ranging code.
Preferably, when base station not needing of receiving that terminal sends carry out again correcting initial or after switching CDMA ranging code, then specify for terminal and send TSTID.Certainly in other embodiments, base station also can receive that terminal sends initial or after switching CDMA ranging code just for terminal specifies TSTID, even if this is initial or switch CDMA ranging code and also need correction.Terminal can retain this TSTID, treats to bring into use to follow-up distance measurement request/response message reciprocal process.A TSTID only can be specified for terminal usually in base station, if but base station indicating concurrent send repeatedly, then and terminal only retains that up-to-date TSTID.
Above-mentioned initial CDMA ranging code refers to the ranging code sent in initial procedure, also can be described as initial ranging code; Switching CDMA ranging code is the ranging code sent in handoff procedure, also can be described as switching ranging code.
When TSTID is sent to terminal by base station, the message of carrying this TSTID can be: CDMA assignment information unit (CDMA_Allocation_IE), or the ranging response message of response ranging code.
The AMS MACAddress of oneself in login request message (AAI-REG-REQ), can be reported base station by terminal.The transmission of this AMS MAC Address needs encipherment protection.
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail, following examples are all described for the process sending initial CDMA ranging code.
Embodiment 1:
Embodiment one is in initial network entry or network re-entry process, uses ranging response message to one of terminal example issuing TSTID, as shown in Figure 1, comprising:
Step 101, after acquisition down-going synchronous and uplink transmission parameter, terminal is the initial CDMA ranging code of Stochastic choice one (CDMA ranging code) from initial ranging territory, and this initial CDMA ranging code is sent to base station in the ranging slot selected;
Step 102, after base station successfully receives initial CDMA ranging code, broadcast a ranging response message, this message comprises: initial CDMA ranging code and this ranging slot residing for initial CDMA ranging code, this message also comprise state instruction continue (continuation) and adjustment information in need (such as time, power and possible frequency correction);
Above-mentioned initial CDMA ranging code and ranging slot are response its distance measurement request for making this ranging response message of terminal check of this initial CDMA ranging code of transmission.
State is designated as continue and represents that this initial CDMA ranging code also needs to correct.
Step 103, if the ranging response message successfully receiving that comprises a Continue state, terminal must continue ranging process, the initial CDMA ranging code of Stochastic choice one from initial ranging territory, and sends in initial ranging region;
Described initial ranging region is the time-frequency region sending ranging code specially.
Step 104, when receiving one and not needing the initial CDMA ranging code corrected, base station is that terminal Random assignment TSTID, this TSTID are unique in base station range; Base station sends ranging response message to terminal, wherein carries parameter: state instruction " Success (success) ", TSTID and for marking terminal information (namely terminal transmission initial CDMA ranging code and this initial CDMA ranging code residing for ranging slot etc.);
After this namely process can carry out marking terminal with TSTID.
If in initial network entry or network re-entry process, the initial CDMA ranging code that terminal sends first does not need to correct, then only comprise step 101 and the step 104. of the present embodiment
Step 105, base station is terminal distribution bandwidth, and send CDMA assignment information unit (CDMA_Allocation_IE) to terminal, be wherein carried to the bandwidth indication information of terminal distribution, this information carrys out marking terminal with TSTID; Or the information such as the initial CDMA ranging code sent by terminal and the ranging slot residing for this initial CDMA ranging code carry out marking terminal.
Step 106, terminal receive send to oneself comprise the CDMA assignment information unit of TSTID after, send distance measurement request message to base station, base station sends ranging response message to terminal, and these two message TSTID carry out marking terminal;
Step 107, pre-authentication capability negotiation procedure is carried out in terminal and base station, consults the parameter that verification process after a while need be used, and negotiations process uses TSTID to carry out marking terminal;
Step 108, terminal and network side carry out authentication and authorization operation, and authentication and authorization process uses TSTID to carry out marking terminal;
Step 109, terminal and network side carry out three-way handshake process, checking authorization key AK, and transmit TEK (stream encryption key) and generate Parameter N ONCE (random number); Terminal and base station generate TEK respectively, for follow-up administrative messag or data encryption; In the process of this three-way handshake, terminal and base station use TSTID to carry out marking terminal;
Step 110, terminal sends login request message to base station, and this message carries parameter: terminal MAC address;
For ensureing the privacy of terminal MAC address, available TEK encrypts this login request message, or can be encrypted terminal MAC address separately, the key of encryption can be KEK (key-encrypting key) or TEK, certainly, to the encryption of login request message and/or other keys can also be used to the encryption of terminal MAC address.
Step 111, base station sends registration reply message to terminal, and in registration process, base station and terminal all use TSTID to carry out marking terminal, and this registration message carries parameter: STID; The transmission of STID needs encipherment protection, and namely message interaction process after this can use STID to carry out marking terminal.
When handoff scenario, such as, under unsteered switch instances, step is similar to above-mentioned flow process, difference is that in step 101 and 103, terminal sends to the CDMA ranging code of base station for switching CDMA ranging code, and step 107-111 can carry out certain omission optimization according to handover optimization indication information, to accelerate the speed switched.
Embodiment 2:
Similar with the flow process of embodiment 1, but difference is, and base station uses CDMA assignment information unit that TSTID is handed down to terminal, as shown in Figure 2, comprising:
Step 201, after acquisition down-going synchronous and uplink transmission parameter, terminal is the initial CDMA ranging code of Stochastic choice one from initial ranging territory, and this initial CDMA ranging code is sent to base station in the ranging slot selected;
Step 202, after base station successfully receives initial CDMA ranging code, broadcast a ranging response message, this message comprises: initial CDMA ranging code, this ranging slot residing for initial CDMA ranging code, state instruction and adjustment in need (such as time, power and possible frequency correction);
Step 203, if the ranging response message successfully receiving that comprises a Continue state, terminal must continue ranging process, the initial CDMA ranging code of Stochastic choice one from initial ranging territory, and sends in initial ranging region;
Step 204, when receive one do not need correct initial CDMA ranging code time, base station sends ranging response message to terminal, wherein carries parameter: state instruction " Success " and the information (Time-Frequency Information such as the initial CDMA ranging code namely received and residing ranging slot thereof) for marking terminal;
Step 205, base station is terminal distribution bandwidth, and is that terminal Random assignment TSTID, this TSTID are unique in base station range, sends CDMA assignment information unit, be wherein carried to bandwidth indication information and the TSTID of terminal distribution to terminal;
Subsequent step is with step 106-step 111 in embodiment 1.
When handoff scenario, such as, under unsteered switch instances, step is similar to above-mentioned flow process, difference is that in step 201 and 203, terminal sends to the CDMA ranging code of base station for switching CDMA ranging code, and step 107-111 can carry out certain omission optimization according to handover optimization indication information, to accelerate the speed switched.
Embodiment 3
As shown in Figure 3, another flow process of terminal initial networking or network re-entry, this flow process is with the difference of embodiment 1 flow process, in this initial network entry or network re-entry process, base station can not send ranging response to terminal, and only send CDMA assignment information unit, therefore the TSTID for terminal distribution is sent to terminal by base station in this CDMA assignment information unit, and described method comprises:
Step 301, after acquisition down-going synchronous and uplink transmission parameter, terminal is the initial CDMA ranging code of Stochastic choice one from initial ranging territory, and this initial CDMA ranging code is sent to base station in the ranging slot selected;
Step 302, after base station successfully receives this initial CDMA ranging code, broadcast a ranging response message, this message comprises the initial CDMA ranging code of terminal transmission and residing ranging slot thereof, response its distance measurement request for sending this ranging response message of terminal check of initial CDMA ranging code, this message also comprise state instruction Continue (continuation) and adjustment in need (such as time, power and possible frequency correction);
Step 303, if the ranging response message successfully receiving that comprises a Continue state, terminal must continue ranging process, the initial CDMA ranging code of Stochastic choice one from initial ranging territory, and sends in initial ranging region;
Step 304, when receiving one and not needing the initial CDMA ranging code corrected, base station is terminal distribution bandwidth, and Random assignment TSTID, this TSTID are unique in base station range; Base station sends CDMA assignment information unit to terminal, is wherein carried to the bandwidth indication information parameter of terminal distribution, TSTID and the information (i.e. the initial CDMA ranging code of terminal transmission and residing ranging slot etc. thereof) for marking terminal;
After this namely distance measurement request/response process can carry out marking terminal with TSTID.
Step 305, terminal receive send to oneself comprise the CDMA assignment information unit of TSTID after, send distance measurement request message to base station, base station sends ranging response message to terminal, in these two message, all identify this terminal with TSTID;
Step 306, pre-authentication capability negotiation procedure is carried out in terminal and base station, consults the parameter that verification process after a while need be used, and negotiations process uses TSTID to carry out marking terminal;
Step 307, terminal and network side carry out authentication and authorization operation, and authentication and authorization process uses TSTID to carry out marking terminal;
Step 308, terminal and network side carry out three-way handshake process, checking authorization key AK, and transmission class encryption key TEK generates stochastic parameter number NONCE; Base station and terminal generate stream encryption cipher key T EK respectively; In the process of this three-way handshake, terminal and base station use TSTID to carry out marking terminal;
Step 309, terminal sends login request message to base station, and this message carries parameter: terminal MAC address; This login request message TEK is encrypted protection, if this login request message is not encrypted, then can be encrypted terminal MAC address separately, the key of encryption can be KEK or TEK, certainly, to the encryption of login request message and/or other keys can also be used to the encryption of terminal MAC address;
Step 310, base station sends registration reply message to terminal, and this message carries parameter: STID; The transmission of STID needs encipherment protection.
In the registration process of step 309-step 310, base station and terminal all use TSTID to carry out marking terminal.And namely message interaction process after this can use STID to carry out marking terminal.
When handoff scenario, such as, under unsteered switch instances, step is similar to above-mentioned flow process, difference is that in step 301 and 303, terminal sends to the CDMA ranging code of base station for switching CDMA ranging code, and step 306-310 can carry out certain omission optimization according to handover optimization indication information, to accelerate the speed switched.
The system realizing said method comprises base station and terminal, wherein:
● described terminal, in the process of initial network entry or network re-entry, sends ranging code to described base station, and for receiving the TSTID that described base station sends;
Further, the terminal MAC address (AMS MAC Address) of oneself also in a registration request message, is reported base station, and is encrypted protection to described login request message and/or terminal MAC address by terminal.
The key used during terminal encryption login request message is stream encryption key (TEK); The key used during ciphering terminal MAC Address is key-encrypting key (KEK) or TEK.
● described base station, for after the described ranging code receiving terminal transmission, is that terminal specifies Temporary Mobile Station Identifier TSTID, and sends it to terminal.
Further, base station is used for after the initial ranging code receiving terminal transmission or after switching ranging code, is that this terminal specifies TSTID.Preferably, base station after the initial ranging code not needing to carry out again correcting receiving terminal transmission or switching ranging code, then is that terminal specifies TSTID.
Described TSTID is sent to terminal by the ranging response message of CDMA assignment information unit or response ranging code by base station.
Base station and terminal also for using described TSTID to identify described terminal in one or several process following: ranging message reciprocal process, pre-authentication capability negotiation procedure, authentication and authorization operating process, three-way handshake process, registration process.
The foregoing is only the preferred embodiments of the present invention.The present invention program is not limited to IEEE802.16 system, its associative mode can be applied in other wireless communication system.For a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method for system for protecting terminal privacy in wireless communication, is characterized in that,
Terminal initial network or network re-entry process in, base station is after receiving the ranging code that terminal sends and before terminal sends distance measurement request message to base station, be that terminal specifies Temporary Mobile Station Identifier TSTID, and send it to terminal;
After described terminal receives described TSTID, in one or several process following, base station and terminal use described TSTID to identify described terminal: ranging message reciprocal process, pre-authentication capability negotiation procedure, authentication and authorization operating process, three-way handshake process, registration process; Wherein, in three-way handshake process, terminal and base station generate stream encryption key respectively for follow-up administrative messag or data encryption;
The terminal MAC address of oneself in a registration request message, is reported base station by terminal, and is encrypted protection to described login request message and terminal MAC address.
2. the method for claim 1, is characterized in that,
Described base station, after the initial ranging code receiving terminal transmission or switching ranging code, is that described terminal specifies TSTID.
3. method as claimed in claim 2, is characterized in that,
Base station receives the initial ranging code not needing to carry out again correcting that terminal sends or switches after ranging code, then is terminal appointment TSTID.
4. the method as described in claim 1 or 2 or 3, is characterized in that,
Described TSTID is sent to terminal by the ranging response message of CDMA assignment information unit or response ranging code by base station.
5. the method for claim 1, is characterized in that,
The key used when encrypting described login request message is stream encryption cipher key T EK;
The key used when encrypting described terminal MAC address is key-encrypting key KEK or TEK.
6. a system for system for protecting terminal privacy in wireless communication, comprises base station and terminal, it is characterized in that,
Described terminal, in the process of initial network entry or network re-entry, sends ranging code to described base station; And for receiving the TSTID that described base station sends;
Described base station, for before terminal sends distance measurement request message to base station, being that terminal specifies Temporary Mobile Station Identifier TSTID, and sending it to terminal after receiving the described ranging code that terminal sends;
Base station and terminal also for using described TSTID to identify described terminal in one or several process following: ranging message reciprocal process, pre-authentication capability negotiation procedure, authentication and authorization operating process, three-way handshake process, registration process; Wherein, in three-way handshake process, terminal and base station generate stream encryption key respectively for follow-up administrative messag or data encryption;
The terminal MAC address of oneself also in a registration request message, is reported base station by described terminal, and is encrypted protection to described login request message and terminal MAC address.
7. system as claimed in claim 6, is characterized in that,
Described base station is further used for after the initial ranging code receiving terminal transmission or switching ranging code, is that described terminal specifies TSTID.
8. system as claimed in claim 7, is characterized in that,
Described base station is further used for after the initial ranging code not needing to carry out again correcting receiving terminal transmission or switching ranging code, then is that terminal specifies TSTID.
9. the system as described in claim 6 or 7 or 8, is characterized in that,
Described TSTID is sent to terminal by the ranging response message of CDMA assignment information unit or response ranging code by described base station.
10. system as claimed in claim 6, is characterized in that,
The key used during login request message described in described terminal encryption is stream encryption cipher key T EK;
The key used during terminal MAC address described in described terminal encryption is key-encrypting key KEK or TEK.
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| CN102196427A (en) * | 2010-03-05 | 2011-09-21 | 中兴通讯股份有限公司 | Air interface key updating method and system |
| KR101711930B1 (en) | 2010-07-05 | 2017-03-06 | 삼성전자주식회사 | System and method for terminal identifier switching in wireless communication system |
| WO2014000156A1 (en) * | 2012-06-26 | 2014-01-03 | 华为技术有限公司 | Network access method, network device access point device and mobility management entity device |
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