RU2371884C1 - Method (versions) and system (versions) of management of network cdma acess - Google Patents
Method (versions) and system (versions) of management of network cdma acess Download PDFInfo
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- RU2371884C1 RU2371884C1 RU2008108541/09A RU2008108541A RU2371884C1 RU 2371884 C1 RU2371884 C1 RU 2371884C1 RU 2008108541/09 A RU2008108541/09 A RU 2008108541/09A RU 2008108541 A RU2008108541 A RU 2008108541A RU 2371884 C1 RU2371884 C1 RU 2371884C1
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Abstract
FIELD: communication facilities.
SUBSTANCE: it is implemented unpredictable for attackers - unattended mobile systems relation of formed in mobile system ringing signal from the secret key, value of time station and random number, that provides increasing of proofness against attack of interlocking of network access, implemented by attacker. It is excluded reuse by attackers of ring signal of operate of mobile systems in the capacity of spurious ring signal, accepted by base station as original. In base station during the receiving and checking of identity of received ring signal excluding additional checking is directly established, is it a ring signal of serviced mobile system or ring signal of unattended mobile system. Characteristics of versions of declared method are different foundations of ring signal conditioning and used for it pseudorandom sequence. In control system of access control CDMA including not less than one base station, authentication center and i- mobile system, where i=1, 2, …, N there are introduced additional blocks and connections to each other.
EFFECT: increasing proofness against attack of network CDMA access blocking.
18 cl, 58 dwg
Description
Claims (18)
где Pдоп - заданная допустимая вероятность ошибочного признания сигнала вызова необслуживаемой мобильной станции как сигнала вызова i-й мобильной станции, - число сочетаний из J по µ.4. The method according to claim 1, characterized in that for identification at the base station of the encoded identifier included in the received call signal, it is divided into L blocks, the l-th block of the received encoded identifier is bitwise compared, where l = 1, 2, ..., L , with the l-th block of the stored encoded identifier and calculating the number К о of matching bits, the value of the l-th bit of the received identifier is taken to be zero when the condition К о ≥2 m-1 is fulfilled, otherwise the value of the l-th bit of the received identifier is accepted equal to one to a different value, compare the bitwise received identifier with the stored identifier I i and calculate the number K from the matched bits, the identification of the received encoded identifier is considered positive when K c ≥J, where the minimum allowable number J of matched bits is determined from the condition ,
where P add - the specified allowable probability of erroneous recognition of the call signal of the unattended mobile station as a call signal of the i-th mobile station, is the number of combinations of J in µ.
Ii разделяют на L блоков, и из каждого из них генерируют последовательность Голда, и последовательно считывают l-е последовательности Голда, где l=1, 2, …, L, в кодированную последовательность, которую суммируют побитно по модулю 2 с кодовой последовательностью проверки, и запоминают просуммированную последовательность в качестве закодированного идентификатора i-й мобильной станции.6. The method according to claim 5, characterized in that for encoding the identifier I i of the i-th mobile station with Gold sequences at the base station, a code sequence is generated according to a given function f 1 , a call key To Bi , a random number R i and a value of time T check length L × 2 m bits, identifier
I i is divided into L blocks, and a Gold sequence is generated from each of them, and the l -th Gold sequence is sequentially read, where l = 1, 2, ..., L, into a coded sequence, which is added bitwise modulo 2 with the verification code sequence , and remember the summed sequence as the encoded identifier of the i-th mobile station.
где Рдоп -заданная допустимая вероятность ошибочного признания сигнала вызова необслуживаемой мобильной станции как сигнала вызова i-й мобильной станции, - число сочетаний из J по µ.8. The method according to claim 5, characterized in that for identification at the base station of the encoded identifier included in the received call signal, it is compared bit by bit with the stored encoded identifier and the number K from the matched bits is calculated, the identification of the received encoded identifier is considered positive when K c ≥ J, where the minimum allowable number J of matched bits is determined from the condition ,
where P add is the set acceptable probability of erroneous recognition of the call signal of the unattended mobile station as a call signal of the i-th mobile station, is the number of combinations of J in µ.
где Pдоп - заданная допустимая вероятность ошибочного признания сигнала вызова необслуживаемой мобильной станции как сигнала вызова i-й мобильной станции, - число сочетаний из J по µ.11. The method according to claim 9, characterized in that for identification at the base station of the encoded identifier included in the received call signal, the received encoded identifier with a stored verification code sequence is added bitwise modulo 2, the summed sequence is divided into L blocks, the stored identifier I i is shared on L blocks, generate from each l-th, where l = 1, 2, ..., L, the block of the stored identifier I i the l-th Kasami sequence 2 m long, which is compared bit by bit with the l-th block of sums of the sequence and calculate the number K from the matched bits, the identification of the received encoded identifier is considered positive when K c ≥J, where the minimum allowable number J of matched bits is determined from the condition ,
where P add - the specified allowable probability of erroneous recognition of the call signal of the unattended mobile station as a call signal of the i-th mobile station, is the number of combinations of J in µ.
где Рдоп - заданная допустимая вероятность ошибочного признания сигнала вызова необслуживаемой мобильной станции как сигнала вызова i-й мобильной станции, - число сочетаний из J по µ.14. The method according to p. 12, characterized in that for identification at the base station of the encoded identifier included in the received call signal, the received encoded identifier is added bitwise modulo 2 with the stored verification code sequence, and the summed sequence is divided into L received M-sequences, decoded lth, where i = 1, 2, ..., L, the received M-sequence, and the lth decoded sequences are sequentially read into the received identifier, the bit-by-bit identifier is compared a torus with a stored identifier I i and calculate the number K from the matched bits, the identification of the received encoded identifier is considered positive when K c ≥J, where the minimum allowable number J of matched bits is determined from the condition ,
where P add - a given allowable probability of erroneous recognition of a call signal of an unattended mobile station as a call signal of the i-th mobile station, is the number of combinations of J in µ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2008108541/09A RU2371884C1 (en) | 2008-03-04 | 2008-03-04 | Method (versions) and system (versions) of management of network cdma acess |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2008108541/09A RU2371884C1 (en) | 2008-03-04 | 2008-03-04 | Method (versions) and system (versions) of management of network cdma acess |
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| Publication Number | Publication Date |
|---|---|
| RU2008108541A RU2008108541A (en) | 2009-09-10 |
| RU2371884C1 true RU2371884C1 (en) | 2009-10-27 |
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| RU2008108541/09A RU2371884C1 (en) | 2008-03-04 | 2008-03-04 | Method (versions) and system (versions) of management of network cdma acess |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003049476A1 (en) * | 2001-12-06 | 2003-06-12 | Zte Corporation | Equipment and method of call admission in cdma based system |
| WO2004102874A1 (en) * | 2003-05-16 | 2004-11-25 | Huawei Technologies Co., Ltd. | A method of implementing high speed data packet operation authentication |
| WO2005036852A1 (en) * | 2003-10-13 | 2005-04-21 | Nokia Corporation | Apparatuses and method for authentication in heterogeneuous ip networks |
| RU2006103360A (en) * | 2003-07-07 | 2006-06-10 | Квэлкомм Инкорпорейтед (US) | SECURE REGISTRATION FOR A BROADCAST MULTICAST MULTIMEDIA SYSTEM (MBMS) |
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2008
- 2008-03-04 RU RU2008108541/09A patent/RU2371884C1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003049476A1 (en) * | 2001-12-06 | 2003-06-12 | Zte Corporation | Equipment and method of call admission in cdma based system |
| WO2004102874A1 (en) * | 2003-05-16 | 2004-11-25 | Huawei Technologies Co., Ltd. | A method of implementing high speed data packet operation authentication |
| RU2006103360A (en) * | 2003-07-07 | 2006-06-10 | Квэлкомм Инкорпорейтед (US) | SECURE REGISTRATION FOR A BROADCAST MULTICAST MULTIMEDIA SYSTEM (MBMS) |
| WO2005036852A1 (en) * | 2003-10-13 | 2005-04-21 | Nokia Corporation | Apparatuses and method for authentication in heterogeneuous ip networks |
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| Publication number | Publication date |
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| RU2008108541A (en) | 2009-09-10 |
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