CN1794736A - Allocation and safety transfer method of base station identifier in broadband radio metropolitan area network - Google Patents
Allocation and safety transfer method of base station identifier in broadband radio metropolitan area network Download PDFInfo
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- CN1794736A CN1794736A CN 200510125704 CN200510125704A CN1794736A CN 1794736 A CN1794736 A CN 1794736A CN 200510125704 CN200510125704 CN 200510125704 CN 200510125704 A CN200510125704 A CN 200510125704A CN 1794736 A CN1794736 A CN 1794736A
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Abstract
This invention relates to a combined distribution and transmission method for base station identifiers in a broad band wireless MAN, which configures a set of a management server of the base station identifiers for the core MAN of each province to deal with the application of the base station identifier of this province and defines an identifier format capable of expressing geographical positions and heberarchy. AT the beginning, the base station sends a distribution request to the management server, which certificates the certificate and distributes and feeds back the identifier for the base station, in the process of delivery, time stamps, certificates and digital sing.
Description
Technical field
The invention belongs to broadband wireless MAN (IEEE 802.16 Wireless Metropolitan AreaNetwork) technical field, the distribution and the safety transfer method of base station identifier in particularly a kind of broadband wireless MAN.
Background technology
Broadband wireless MAN is a kind of broadband network that can provide high-speed radio to insert in the metropolitan area scope.IEEE 802.16 standard definitions the air interface specification of broadband wireless access.Document [1] CarlEklund, Roger B.Marks, " IEEE Standard 802.16:A Technical Overview of theWirelessMANTM Air Interface for Broadband Wireless Access ", IEEEC802.16-02/05,2002.Base station identifier (Base Station Identifier, BSID) be can a wireless base station of unique identification in carrier network symbol.In 802.16 standards, when base station during to subscriber station periodic broadcast down channel descriptor, base station identifier has shown the transmit leg under the downlink information; When subscriber station moves and during handover, subscriber station also needs to use the base station identifier negotiation and determines to switch to which target BS, but, 802.16 standard does not define the method for the form of base station identifier and distribution, transmission identifier, therefore, be necessary to provide the distribution and the safety transfer method of base station identifier in a kind of broadband wireless MAN.
Summary of the invention
The distribution and the safety transfer method that the purpose of this invention is to provide base station identifier in a kind of broadband wireless MAN.
The present invention requires two kinds of entities in the broadband wireless MAN: base station and base station identifier management server are finished base station identifier jointly and are distributed and safe transport process.The network topology structure of broadband wireless MAN as shown in Figure 1.Core net is made of several metro core nets arranged side by side.Metro core has disposed authentication, registration, management server on the net.Subscriber station inserts the wireless base station under fixed mode or Move Mode, the base station is linked in the metro core net by router.Various fixed terminals then are linked in the metro core net by Ethernet.For ease of linking to each other with various other networks, each metro core has also disposed exchange gateway on the net.
The present invention requires to be equipped with a stylobate station identifier management server on the core metropolitan area network in each province or state, it is identifier allocation and transmission server, also be the base station identity certificate server simultaneously, therefore, it must preserve the CA certificate chain of base station manufacturer.
The present invention has defined a kind of 48 base station identifier forms that can reflect geographical position and hierarchical structure, and syllable sequence begins to finish to low address from high address, and is as shown in the table.
The high address low address
| Country (8) | State/province (6) | |
| Operator's numbering (10) | City (8) | |
| Base station numbering (16) | ||
48 base station identifier forms
8 in country is used to represent the residing country in base station numbering, Serial Number Range: 0～255
State/economize 6 is used to represent residing state or province, base station part numbering, Serial Number Range: 0～63
10 of operator's numberings are used to represent that the operator under the base station numbers Serial Number Range: 0～1023
8 in city is used to represent residing city, base station numbering, Serial Number Range: 0～255
16 of base station numberings, the base station numbering in the same city scope, Serial Number Range: 0～65535
Because different base stations may return different operators to own, so need to reserve operator's number field; And wireless MAN is with the object of city as network settings, has therefore defined country, state/province, three fields in city, has both reflected the geographical position, has also reflected hierarchical structure; Base station in the same city scope then adopts the base station number field to distinguish.48 base station identifier can be divided into high 24 and low 24, and wherein, high 24 are called Operator ID (OperatorIdentifier), the operator in can unique identification MAN scope; Low 24 bit representation base stations numbering and residing city numbering thereof, minimum 8 of 16 base station numberings can be used as sector marker (Sector Identifier), are used to distinguish different base station sections.
The present invention has defined base station identifier request message Bs_Id_Request and base station identifier is replied message Bs_Id_Reply, is used for safety transmission identifier between base station and base station identifier management server.The message structure of two kinds of message is as shown in the table:
0 7 8 16
| Type | Resv |
| Timestamping BS | |
| Cert BS | |
| Signgn BS | |
Base station identifier request message message structure
Timestamping
BSThe base station current time stabs, and 16, is used to the base station identifier management server to judge whether the message that receives is that Replay Attack provides foundation
Sign
BSThe base station is certificate X.509, is the proof that shows the base station legal identity, and management server after the legal identity authentication success to the base station, just is the base station assigns identifier only.
Cert
BSMessage integrity and non-repudiation are worked to guarantee to the digital signature of message in the base station
0 7 8 16
| Type | Resv |
| Timestamping Serv | |
| Result | |
| BS ID | |
| Cert BS | |
| Cert Serv | |
| Sign Serv | |
Base station identifier is replied the message packet structure
Timestamping
ServThe base station identifier management server current time stabs, and 16, prevents replay attack
Result success identification item, shows whether the allocation base station identifier is successful by 16
BS ID base station identifier, 48, current from the base station identifier management server not with distributing the identifier address pond
Cert
BSThe base station certificate is used to check whether answer message is corresponding with the request message that sends
Cert
ServBase station identifier management server certificate provides the RSA PKI of server for the base station
Sign
ServThe base station identifier management server works to guarantee message integrity and non-repudiation to the digital signature of message
More than Type in two message packet structures be 8 message type field, 0 expression identifier request message, 1 sign identifier is replied message; Resv is 8 reserved field, is used for extension of message.
The base station handling process as shown in Figure 3, base station identifier management servers process flow process is as shown in Figure 4.
Analyze the distribution and the safety transfer method of above-mentioned base station identifier, it is as follows that summary obtains characteristics of the present invention:
(1) is easy to arrange net.Only need configuration one stylobate station identifier management server on the core net of each state or province part, just can satisfy is the Honshu or the demand of base station assigns identifier inside the province originally.
(2) Ding Yi 48 base station identifier forms can be distinguished different operators, and reflection residing geographical position, base station and hierarchical structure are easy to be identifier unique in the base station assigns net.
(3) adopt timestamp, certificate and digital signature identification mechanism, effectively prevent the generation of situations such as Replay Attack in the base station identifier transport process and opponent's forged identity illegal request base station identifier.
Technical scheme
The distribution of base station identifier and safety transfer method in a kind of broadband wireless MAN, the assigning process of base station identifier BSID and safe transport process combine; For the core metropolitan area network in each province or state disposes a stylobate station identifier BSID management server, be responsible for handling obtaining of base station identifier BSID application in this province or the state scope; Defined a kind of base station identifier BSID form that can reflect geographical position and hierarchical structure; At initial phase, base station BS sends the identifier allocation request to base station identifier BSID management server, and base station identifier BSID management server just is base station assigns and returns identifier after to base station BS certificate verification success.In message process, service time, stamp, certificate and digital signature identification mechanism effectively prevented the generation of situations such as Replay Attack and opponent's forged identity illegal request base station identifier.
All be equipped with a stylobate station identifier management server on the core metropolitan area network in each province or state, it is identifier allocation and transmission server, also is the base station identity certificate server simultaneously.
Defined a kind of 48 base station identifier forms that can reflect geographical position and hierarchical structure, the form syllable sequence is followed successively by 8 bit representation countries, 6 bit representation state or province parts, 10 bit representation carrier ID, 8 bit representation cities, 16 bit representation base stations numbering from the high address to the low address.
The attribute of base station identifier request message Bs_Id_Request comprises: type of message, reserved field, base station current time stamp, base station certificate and base station are to preceding four digital signature.
The attribute that base station identifier is wherein replied message Bs_Id_Reply comprises: type of message, reserved field, server current time stamp, identification item Result, newly assigned base station identifier BSID, base station certificate, server certificate and server are to above seven digital signature.
Description of drawings
Fig. 1 is the broadband wireless MAN topology diagram.
Fig. 2 is that the distribution of base station identifier transmits schematic diagram with safety.
Fig. 3 is the base station process chart.
Fig. 4 is a base station identifier management servers process flow chart.
Embodiment
The distribution of base station identifier transmits flow process as shown in Figure 2 with safety, and step is as follows:
Step S1: at initial phase, the base station sends identifier request message Bs_Id_Request to the base station identifier management server, and starts retransmission timer T0.
Step S2: the base station identifier management server receives after the Bs_Id_Request message, if the digital signature of authentication base station and certificate success, putting identification item Result is 1, according to the geographical position, from the base station identifier address pool of current not usefulness, be the new identifier of base station assigns, transmit a reply message Bs_Id_Reply; Otherwise putting identification item Result is 0, and the allocation base station identifier does not directly transmit a reply message Bs_Id_Reply;
Step S3: the base station receives replys after the message Bs_Id_Request, cancellation retransmission timer T0, if the digital signature success of checking base station identifier management server, and Result equals 1, show and obtain the base station identifier success, otherwise, show and obtain the base station identifier failure, need resend request.
The distribution of broadband wireless MAN base station identifier and safety transfer method, wherein the handling process of base station BS as shown in Figure 3, each event handling step is as follows:
S3.1: the base station obtains the current time and stabs;
S3.2: use the RSA private key of base station that the timestamp and the base station certificate that obtain are encrypted, obtain the digital signature of these two attributes;
S3.3: generate base station identifier request message Bs_Id_Request, and send to server;
S3.4: start repeat requests timer T0;
S3.5: if timer T0 is overtime, enter S3.1, otherwise, change S3.7 over to;
S3.6: the base station receives base station identifier and replys message Bs_Id_Reply;
S3.7: cancellation retransmission timer T0;
S3.8: resolve Bs_Id_Reply message;
S3.9: if the success of Bs_Id_Reply message parse enters S3.10, otherwise, change S3.1 over to;
S3.10: from Bs_Id_Reply message, obtain the RSA PKI in the server certificate;
S3.11: the RSA PKI that uses server is to the Bs_Id_Reply decrypt messages, and authentication server is to the digital signature of Bs_Id_Reply message;
S3.12: if RSA PKI successful decryption illustrates that the digital signature of Bs_Id_Reply message and integrality have obtained checking, enter S3.13, otherwise, change S3.1 over to;
S3.13: check whether the base station certificate item in the Bs_Id_Reply message is consistent with the certificate of oneself;
S3.14: if the certificate in the message is consistent with oneself certificate, illustrate Bs_Id_Reply message that the base station receives and this base station before the Bs_Id_Request message of transmission be complementary, enter S3.15, otherwise, change S3.1 over to;
S3.15: check the timestamp in the Bs_Id_Reply message, determine newly to send message or Replay Attack;
S3.16: if be confirmed to be new transmission message, enter S3.17, otherwise, change S3.1 over to;
S3.17: if the Result item in the Bs_Id_Reply message is 1, show the success of server-assignment base station identifier, enter S3.18, otherwise, change S3.1 over to;
S3.18: so far, the base station has successfully obtained base station identifier;
S3.19: the base station obtains the identifier flow process and finishes.
The distribution of broadband wireless MAN base station identifier and safety transfer method, wherein the handling process of base station identifier management server (BSID Management Server) as shown in Figure 4, each event handling step is as follows:
S4.1: the base station identifier management server receives the Bs_Id_Request message that the base station sends, and resolves message;
S4.2: if the success of Bs_Id_Request message parse enters S4.3, otherwise, change S4.9 over to;
S4.3: the RSA PKI that obtains base station certificate in the Bs_Id_Request message;
S4.4: the RSA PKI that uses the base station is to the Bs_Id_Request decrypt messages, and the checking base station is to the digital signature of Bs_Id_Request message;
S4.5: if RSA PKI successful decryption illustrates that the digital signature of Bs_Id_Request message and integrality have obtained checking, enter S4.6, otherwise, change S4.9 over to;
S4.6: putting identification item Resuk is 1;
S4.7: search is kept at the base station manufacturer CA certificate chain of book server, and the RSA PKI that obtains base station manufacturer is used for the base station certificate is authenticated;
S4.8: if server enters S4.10 to the certificate verification success of base station, otherwise, change S4.9 over to;
S4.9: putting identification item Result is 0, enters S4.12;
S4.10:, be the new identifier of base station assigns from the base station identifier address pool of current not usefulness according to the geographical position;
S4.11: the binding relationship of server update base station identifier and base station certificate, be convenient to later searching;
S4.12: generate base station identifier according to the Result identification item and reply message Bs_Id_Reply;
S4.13: server sends to the base station the Bs_Id_Reply information signature;
S4.14: the base station identifier management server distributes, sends the identifier flow process to be finished.
Claims (8)
1. the distribution and the safety transfer method of base station identifier in the broadband wireless MAN, it is characterized in that: the assigning process of base station identifier BSID and safe transport process combine; For the core metropolitan area network in each province or state disposes a stylobate station identifier BSID management server, be responsible for handling obtaining of base station identifier BSID application in this province or the state scope; Defined a kind of base station identifier BSID form that can reflect geographical position and hierarchical structure; At initial phase, base station BS sends the identifier allocation request to base station identifier BSID management server, and base station identifier BSID management server just is base station assigns and returns identifier after to base station BS certificate verification success.
2. according to the distribution and the safety transfer method of base station identifier in the broadband wireless MAN of claim 1, it is characterized in that, on the core metropolitan area network in each province or state, all be equipped with a stylobate station identifier management server, it is identifier allocation and transmission server, also is the base station identity certificate server simultaneously.
3. according to the distribution and the safety transfer method of base station identifier in the broadband wireless MAN of claim 1, it is characterized in that, defined a kind of 48 base station identifier forms that can reflect geographical position and hierarchical structure, the form syllable sequence is followed successively by 8 bit representation countries, 6 bit representation state or province parts, 10 bit representation carrier ID, 8 bit representation cities, 16 bit representation base stations numbering from the high address to the low address.
4. according to the distribution and the safety transfer method of base station identifier in the broadband wireless MAN of claim 1, it is characterized in that the flow process that identifier is obtained in the base station application is as follows:
Step S1: at initial phase, the base station sends identifier request message Bs_Id_Request to the base station identifier management server, and starts retransmission timer TO;
Step S2: the base station identifier management server receives after the Bs_Id_Request message, if the digital signature of authentication base station and certificate success, putting identification item Result is 1; According to the geographical position, from the base station identifier address pool of current not usefulness, be the new identifier of base station assigns, transmit a reply message Bs_Id_Reply, otherwise putting identification item Result is 0, the allocation base station identifier does not directly transmit a reply message Bs_Id_Reply;
Step S3: the base station receives replys after the message Bs_Id_Request, cancellation retransmission timer T0, if the digital signature success of checking base station identifier management server, and Result equals 1, show and obtain the base station identifier success, otherwise, show and obtain the base station identifier failure, need resend request.
5. according to the distribution and the safety transfer method of base station identifier in the broadband wireless MAN of claim 4, the attribute of base station identifier request message Bs_Id_Request wherein comprises: type of message, reserved field, base station current time stamp, base station certificate and base station are to preceding four digital signature.
6. according to the distribution and the safety transfer method of base station identifier in the broadband wireless MAN of claim 4, the attribute that base station identifier is wherein replied message Bs_Id_Reply comprises: type of message, reserved field, server current time stamp, identification item Result, newly assigned base station identifier BSID, base station certificate, server certificate and server are to above seven digital signature.
7. according to the distribution and the safety transfer method of base station identifier in the broadband wireless MAN of claim 1, it is characterized in that the handling process concrete steps of base station BS are as follows:
S3.1: the base station obtains the current time and stabs;
S3.2: use the RSA private key of base station that the timestamp and the base station certificate that obtain are encrypted, obtain the digital signature of these two attributes;
S3.3: generate base station identifier request message Bs_Id_Request, and send to server;
S3.4: start repeat requests timer T0;
S3.5: if timer T0 is overtime, enter S3.1, otherwise, change S3.7 over to;
S3.6: the base station receives base station identifier and replys message Bs_Id_Reply;
S3.7: cancellation retransmission timer T0;
S3.8: resolve Bs_Id_Reply message;
S3.9: if the success of Bs_Id_Reply message parse enters S3.10, otherwise, change S3.1 over to;
S3.10: from Bs_Id_Reply message, obtain the RSA PKI in the server certificate;
S3.11: the RSA PKI that uses server is to the Bs_Id_Reply decrypt messages, and authentication server is to the digital signature of Bs_Id_Reply message;
S3.12: if RSA PKI successful decryption illustrates that the digital signature of Bs_Id_Reply message and integrality have obtained checking, enter S3.13, otherwise, change S3.1 over to;
S3.13: check whether the base station certificate item in the Bs_Id_Reply message is consistent with the certificate of oneself;
S3.14: if the certificate in the message is consistent with oneself certificate, illustrate Bs_Id_Reply message that the base station receives and this base station before the Bs_Id_Request message of transmission be complementary, enter S3.15, otherwise, change S3.1 over to;
S3.15: check the timestamp in the Bs_Id_Reply message, determine newly to send message or Replay Attack;
S3.16: if be confirmed to be new transmission message, enter S3.17, otherwise, change S3.1 over to;
S3.17: if the Result item in the Bs_Id_Reply message is 1, show the success of server-assignment base station identifier, enter S3.18, otherwise, change S3.1 over to;
S3.18: so far, the base station has successfully obtained base station identifier;
S3.19: the base station obtains the identifier flow process and finishes.
8. according to the distribution and the safety transfer method of base station identifier in the broadband wireless MAN of claim 1, it is characterized in that the handling process concrete steps of base station identifier management server (BSID Management Server) are as follows:
S4.1: the base station identifier management server receives the Bs_Id_Request message that the base station sends, and resolves message;
S4.2: if the success of Bs_Id_Request message parse enters S4.3, otherwise, change S4.9 over to;
S4.3: the RSA PKI that obtains base station certificate in the Bs_Id_Request message;
S4.4: the RSA PKI that uses the base station is to the Bs_Id_Request decrypt messages, and the checking base station is to the digital signature of Bs_Id_Request message;
S4.5: if RSA PKI successful decryption illustrates that the digital signature of Bs_Id_Request message and integrality have obtained checking, enter S4.6, otherwise, change S4.9 over to;
S4.6: putting identification item Result is 1;
S4.7: search is kept at the base station manufacturer CA certificate chain of book server, and the RSA PKI that obtains base station manufacturer is used for the base station certificate is authenticated;
S4.8: if server enters S4.10 to the certificate verification success of base station, otherwise, change S4.9 over to;
S4.9: putting identification item Result is 0, enters S4.12;
S4.10:, be the new identifier of base station assigns from the base station identifier address pool of current not usefulness according to the geographical position;
S4.11: the binding relationship of server update base station identifier and base station certificate, be convenient to later searching;
S4.12: generate base station identifier according to the Result identification item and reply message Bs_Id_Reply;
S4.13: server sends to the base station the Bs_Id_Reply information signature;
S4.14: the base station identifier management server distributes, sends the identifier flow process to be finished.
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