CA2039699A1 - Synchronizing method in a mobile radio system - Google Patents

Synchronizing method in a mobile radio system

Info

Publication number
CA2039699A1
CA2039699A1 CA2039699A CA2039699A CA2039699A1 CA 2039699 A1 CA2039699 A1 CA 2039699A1 CA 2039699 A CA2039699 A CA 2039699A CA 2039699 A CA2039699 A CA 2039699A CA 2039699 A1 CA2039699 A1 CA 2039699A1
Authority
CA
Canada
Prior art keywords
ciphering
ciphered
information
key
mobile radio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2039699A
Other languages
French (fr)
Other versions
CA2039699C (en
Inventor
Jan Erik Ake Steinar Dahlin
Walter Ghisler
Bengt Yngve Persson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2039699A1 publication Critical patent/CA2039699A1/en
Application granted granted Critical
Publication of CA2039699C publication Critical patent/CA2039699C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/12—Transmitting and receiving encryption devices synchronised or initially set up in a particular manner
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/03—Protecting confidentiality, e.g. by encryption
    • H04W12/037—Protecting confidentiality, e.g. by encryption of the control plane, e.g. signalling traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/80—Wireless

Abstract

A synchronizing method in a mobile radio system which operates with Time Division Multiple Access (TDMA) but which lacks global time reference for all base stations and mobiles in the system.
The inventive method is intended for ciphered transmission of data and speech in accordance with a given ciphering key (E2). When handing-over a call, the ciphering synchronism is lost. In accordance with the method, subsequent to hand-off (the time t2), the take-over base station (BS2) signals non-ciphered information (S1) to the mobile (MS) disclosing the number of frames (R1-R13) which shall pass until ciphering can again be commenced, calculated from a given frame (R1). Call information is transmitted in the following frame (R2), this information now being ciphered with the aid of a ciphering key (E1) different to the original key. This other ciphering key consists of a periodic bit sequence having a period which is equal to one frame interval.
CA002039699A 1989-09-12 1990-07-19 Synchronizing method in a mobile radio system Expired - Fee Related CA2039699C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE8902994A SE464553B (en) 1989-09-12 1989-09-12 METHOD OF SYNCHRONIZATION IN A MOBILE RADIO SYSTEM
SE8902994-6 1989-09-12
PCT/SE1990/000497 WO1991004620A1 (en) 1989-09-12 1990-07-19 Synchronizing method in a mobile radio system

Publications (2)

Publication Number Publication Date
CA2039699A1 true CA2039699A1 (en) 1991-03-13
CA2039699C CA2039699C (en) 1999-09-28

Family

ID=20376856

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002039699A Expired - Fee Related CA2039699C (en) 1989-09-12 1990-07-19 Synchronizing method in a mobile radio system

Country Status (13)

Country Link
JP (1) JP2978243B2 (en)
KR (1) KR970002747B1 (en)
CN (1) CN1023283C (en)
AU (1) AU625469B2 (en)
CA (1) CA2039699C (en)
DE (1) DE4026698C2 (en)
FR (1) FR2652468B1 (en)
GB (1) GB2236458B (en)
HK (1) HK58695A (en)
MY (1) MY106831A (en)
NZ (1) NZ234720A (en)
SE (1) SE464553B (en)
WO (1) WO1991004620A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2260245B (en) * 1991-10-04 1995-03-08 Technophone Ltd Digital radio receiver
WO1994022245A1 (en) * 1993-03-23 1994-09-29 Telefonaktiebolaget Lm Ericsson A method for cascading of microbases
CN101031143B (en) * 1997-04-24 2011-10-26 株式会社Ntt都科摩 Method and system for mobile communications
FR2809576B1 (en) 2000-05-23 2002-11-15 Nortel Matra Cellular METHOD FOR CONTROLLING A CHANNEL BETWEEN A RADIO TERMINAL AND A CELLULAR RADIO COMMUNICATION INFRASTRUCTURE, AND ACCESS NETWORK IMPLEMENTING SUCH A METHOD
FR2809579B1 (en) * 2000-05-23 2003-07-04 Nortel Matra Cellular METHOD FOR CONTROLLING A CHANNEL BETWEEN A RADIO TERMINAL AND A CELLULAR RADIO COMMUNICATION INFRASTRUCTURE, AND ACCESS NETWORK IMPLEMENTING SUCH A METHOD
DE10056361A1 (en) * 2000-11-14 2002-05-23 Philips Corp Intellectual Pty Wireless network for the transmission of parameters for encrypted data transmission
CN101084695B (en) * 2004-11-02 2013-03-27 北电网络有限公司 Systems and methods for use with orthogonal frequency division multiplexing
KR100902112B1 (en) * 2006-11-13 2009-06-09 한국전자통신연구원 Insertion method and transmission method of vector information for voice data estimating in key re-synchronization, and voice data estimating method in key re-synchronization using vector information

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1429469A (en) * 1961-07-19 1976-03-24 Hell Rudolf Method for subsequently setting data receivers in a contrinuous transmission of encoded data transmitted in binary code form
DE978043C (en) * 1962-08-27 1977-04-21 Siemens Ag Method and device for the encrypted transmission of telex messages
EP0028272A1 (en) * 1979-11-03 1981-05-13 PATELHOLD Patentverwertungs- & Elektro-Holding AG Method and device for the transmission of enciphered information
US4411017A (en) * 1980-03-14 1983-10-18 Harris Corporation Secure mobile telephone system
US4555805A (en) * 1980-03-14 1985-11-26 Harris Corporation Secure mobile telephone system
DE3150254A1 (en) * 1981-04-13 1983-07-14 Siemens AG, 1000 Berlin und 8000 München DEVICE FOR ENCRYPTED DIGITAL INFORMATION TRANSFER
US4549308A (en) * 1982-07-12 1985-10-22 At&T Bell Laboratories Secure mobile radio telephony
TR23067A (en) * 1985-07-12 1989-02-21 Siemens Ag A METHOD AND EQUIPMENT TO INCRETE THE ENCRYPED RADIO TRAFFIC
JPS62137937A (en) * 1985-12-12 1987-06-20 Fujitsu Ltd Line changeover system
US4803726A (en) * 1986-12-31 1989-02-07 Motorola, Inc. Bit synchronization method for a digital radio telephone system

Also Published As

Publication number Publication date
CN1023283C (en) 1993-12-22
HK58695A (en) 1995-04-28
NZ234720A (en) 1992-12-23
KR970002747B1 (en) 1997-03-10
SE464553B (en) 1991-05-06
AU6353590A (en) 1991-04-18
CN1050294A (en) 1991-03-27
CA2039699C (en) 1999-09-28
GB2236458A (en) 1991-04-03
DE4026698C2 (en) 1999-06-17
DE4026698A1 (en) 1991-03-14
JP2978243B2 (en) 1999-11-15
JPH04501944A (en) 1992-04-02
FR2652468A1 (en) 1991-03-29
KR920702120A (en) 1992-08-12
MY106831A (en) 1995-07-31
FR2652468B1 (en) 1992-07-03
SE8902994L (en) 1991-03-13
SE8902994D0 (en) 1989-09-12
GB2236458B (en) 1993-10-13
AU625469B2 (en) 1992-07-09
WO1991004620A1 (en) 1991-04-04
GB9017473D0 (en) 1990-09-26

Similar Documents

Publication Publication Date Title
CA2233463A1 (en) An information encryption method
SE9201955L (en) EXTERNAL TRAINING IN A RADIO PHONE SYSTEM
SG49019A1 (en) Method of transmitting timing advance data to a mobile in a cellular mobile radio network and corresponding mobile base station and transmission system
TW359941B (en) Method and basis-station-system to configure a radio interface between a mobile station and a basis-station of time-multiplex mobile radio system for a packet-data transmission
EP0136517A3 (en) Deterministic multi-access method for a decentralized mobile radio system
MY106895A (en) Multiple access handling in a cellular communications system
WO1996009725A3 (en) Selective resynchronization in a digital cellular communications system during handover
MY138336A (en) Method and apparatus for dynamically selecting the length of mobile station burst communications on the reverse digital control channel
AU1590000A (en) Cell hand-off border identification using ms positioning and signal strength values
NZ315018A (en) Synchronising direct connection between mobile telephones
EP0863682A4 (en) Mobile communication system
HUP0000251A2 (en) Time-multiplexed short message acknowledgment systems and methods
CA2077269A1 (en) Time synchronization of a receiver in a digital radio telephone system
CA2039699A1 (en) Synchronizing method in a mobile radio system
EP0749256A3 (en) TDMA mobile communication system and handover method therefor
AU647297B2 (en) Signal processing sequencing during half-rate call mode in digital cellular mobile radio system
NZ331135A (en) Periodic transmission of supervisory messages on control channel flagged by transmitted control filler
CA2051738A1 (en) Method for reducing the risk of poor reception in a mobile telephony system
JPH10126367A (en) Method and device for action control by time slot method
JPH1013955A (en) Group communication synchronizing system
DK0609418T3 (en) Radio system and data transmission in a radio system
MY109023A (en) Time synchronization of a receiver in a digital radio telephone system
WO1995022872A3 (en) Controlling timing of a transmission by a mobile station
JPS60223255A (en) Data demodulator
EP0952692A3 (en) Method for controlling a digital system

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20030721