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7433674 Apparatus and method for credit based management of telecommunication activity  
The present invention provides an apparatus for credit based management of a telecommunication system. One embodiment of the apparatus includes an interface for communicating credit information on...
7409704 System and method for local policy enforcement for internet service providers  
A telecommunications system and method is disclosed for implementing a Policy Enforcement Point (PEP) for an Internet Service Provider (ISP) at the subscriber premises. This PEP enforces policies...
7349540 Generation of user equipment identification specific scrambling code for high speed shared control channel  
A user equipment is used in a code division multiple access communication system. The user equipment comprises circuitry configured to process a user equipment identification (UE ID) by ½ rate...
RE39980 Calling channel in CDMA communications system  
A Code Division Multiple Access (CDMA) communication system which contains a calling channel which is used to inform silent mobiles that they are being called. In the system, the calling channel is...
7305211 Satellite communications system using multiple earth stations  
A satellite communications system uses multiple ground stations and one or more satellites for communicating between mobile subscribers and a land-based communications network, such as the PSTN or...
7283804 Method of controlling a network entity and a mobile station  
A network entity and the mobile station are adapted to conduct a plurality of predetermined message exchange procedures, including encryption key generation procedures. The method comprises...
7266363 Apparatus and method for credit based management of telecommunication activity  
The present invention provides an apparatus for credit based management of a telecommunication system. One embodiment of the apparatus includes an interface for communicating credit information on...
7248874 Mobile assisted handover using CDMA  
A mobile station assists the wireless network with handover from a first base station to a second base station. The mobile station receives transmissions from the first base station using a first...
7213144 Efficient security association establishment negotiation technique  
A Security Association establishment negotiation technique includes forwarding identifying information from a Mobile Node via a first interface to a first network element. Negotiations are then...
7212820 Mobile assisted handover using CDMA  
A method and system for facilitating handover in mobile radio communication systems are illustrated. The mobile unit assists in making handover decisions by monitoring the signal strength of...
7177424 Cryptographic apparatus and method  
An encryption system comprises a pseudo-random number generator (KS) for generating a long pseudo-random sequence (S) from a shorter encryption key (K) and, if necessary, a nonce value (N), and a...
7137548 Removable card for use in a radio unit  
A cellular phone includes a first removable subscriber identification card which has a microprocessor and memory that stores subscriber identification information. The cellular phone also includes...
7131006 Cryptographic techniques for a communications network  
Techniques are described for enabling authentication and/or key agreement between communications network stations and service networks. The techniques described include the negotiation and use of a...
7027454 Multi-signal transmit array with low intermodulation  
A transmitter is provided for simultaneously transmitting a plurality of signals in a plurality of directive beams to corresponding destination stations, each destination station located in a...
7006633 Global encryption system  
A system and method for encryption, transmission and decryption of data based on a publicly or other wide area broadcast random number sequence. Encryption is by a selected subsequence from the...
6975858 Method and apparatus for reducing signalling load in mobile telecommunications networks  
In the UMTS, semi-static uplink and downlink connection parameters relating to the frequently-used services of voice, fax and web browsing are intermittently broadcast to mobile user equipment ( 20...
6944296 Video bit scrambling  
In some embodiments, the invention includes a method to bit scramble a digital video signal. The method includes receiving blocks of the digital video signal and scrambling the blocks of the...
6944253 Circuit and software for generating a stream cipher  
A circuit or software generates a cipher stream. The software models components or the circuit comprises a first and a second plurality of linear feedback shift registers (LFSR). A first of the...
6879690 Method and system for delegation of security procedures to a visited domain  
A method and system for delegation of security procedures to a second domain. A first key is generated for a mobile node. The first key is stored at the mobile node and at a home domain of the...
6819916 Memory device for a cellular telephone  
A memory device for use with a cellular telephone capable of communicating with a customer activation center (CAC) via a cellular telephone network. The memory device includes a dummy mobile...
6769060 Method of bilateral identity authentication  
A method for bilateral identity authentication over a communication channel provides a secure method for authenticating the identity of the communicating parties and establishing a secret key. Each...
6766161 Method and apparatus for securing communications  
The present invention provides a method and apparatus for identifying and minimizing the use of cloned communicating devices which communicate with a host device. The method requires that the...
6714614 Subscriber unit for generating a stream cipher  
One embodiment of the invention is a subscriber unit for transmitting communication signals. The subscriber unit comprises a cipher stream generator which generates a cipher stream to encipher a...
6690798 Key transforms to discriminate between beams in a multi-beam satellite communication system  
A method and apparatus is described for transforming a key variable used for scrambling mobile data traffic between a terminal and a network in alternate ways based on a value transmitted to the...
6665530 System and method for preventing replay attacks in wireless communication  
A method and apparatus for confirming the identity of a mobile station in a communication network. A mobile station transmits a security value to obtain access to the network. The system...
6650868 Mobile satellite phone system incorporating symmetrical and non-symmetrical waveform modes  
An improved multi-mode telephone for use in an improved satellite communication method and system. The telephone is selectively capable of receiving signals at different carrier bandwidths, such...
6633979 Methods and arrangements for secure linking of entity authentication and ciphering key generation  
Methods and arrangements are provided for use in communications systems that allow for secure communication sessions to be conducted over a communications link between at least two nodes. An entity...
6611913 Escrowed key distribution for over-the-air service provisioning in wireless communication networks  
An escrowed key distribution system for over-the-air service provisioning of cellular telephones and other wireless communication devices provides a secure and efficient authentication key...
6594481 Apparatus and method for detecting potentially fradulent telecommunication  
The present invention provides an apparatus for credit based management of a telecommunication system. One embodiment of the apparatus includes an interface for communicating credit information on...
EP0839417B1 DECRYPTION OF RETRANSMITTED DATA IN AN ENCRYPTED COMMUNICATION SYSTEM  
Abstract not available for EP0839417 Abstract of corresponding document: WO9744934 The method generally includes the steps of receiving (201) a message (100) comprising a message indicator (101)...
6567475 Method and system for the transmission, reception and processing of 4-level and 8-level signaling symbols  
A method and system for the transmission, reception, and processing of 4-level and 8-level signaling symbols is provided. An inventive modulator is provided for modulating 4-level signaling symbols...
EP1040599B1 KEY TRANSFORMS TO DISCRIMINATE BETWEEN BEAMS IN A MULTI-BEAM SATELLITE COMMUNICATION SYSTEM  
Abstract not available for EP1040599 Abstract of corresponding document: US6690798 A method and apparatus is described for transforming a key variable used for scrambling mobile data traffic...
6532290 Authentication methods  
In one way to improve the security of bilateral authentication procedures while keeping transmission overhead to a minimum, a first party wishing to initiate communications with a second party...
6515976 Demodulation method and apparatus in high-speed time division multiplexed packet data transmission  
A method and apparatus for demodulating a communication signal transmitted at a first rate is provided, wherein the communication signal includes a plurality of addresses and corresponding data...
6505039 Call security system which detects fraud by examination of call history  
A method and apparatus for reducing the vulnerability of the telecommunications system to unauthorized use that is easy to implement and that can reduce the instances of unauthorized access even...
6466780 Method and apparatus for securing digital communications  
The present invention provides a method and apparatus for identifying and minimizing the use of cloned communicating devices which communicate with a host device. The method requires that the...
6464743 Mobile telecommunication station  
A mobile telecommunication station which is connected to a mobile telecommunication network and is provided with a mobile telecommunication service from the network, providing a function enabling...
6445937 Methods and apparatus for mobile phone power management  
A mobile telephone power management method and apparatus is disclosed that places the telephone in a dormant, or idle, mode. In this mode, battery power is only supplied to a device incorporated...
6430246 Method and apparatus for generating a stream cipher  
A code division multiple access (CDMA) is a type of spread-spectrum communication system having a plurality of subscriber units and at least one base station. In order for a first subscriber unit...
EP0915630B1 Strengthening the authentification protocol  
6421537 Method and apparatus for providing switch capability mediation in a mobile telephone system  
An improved home location register (HLR) that includes a switch capability mediation module for implementing switch capability mediation between different mobile switching centers (MSCs). According...
RE37787 Handover method for mobile radio system  
The invention relates to a method in mobile radio systems in which the responsibility for transmitting message information to a mobile station is handed over from a first base station transmitter...
6393300 Device for connecting a telephone switch to a fixed telephone network via a radio telephone network  
Apparatus for connecting telephone switch to fixed telephone network or PSTN via a radiotelephone network of GSM type or type derived therefrom. A fixed radiotelephone terminal (RT) has a processor...
RE37685 Handover method for mobile radio system  
The invention relates to a method in mobile radio systems in which the responsibility for transmitting message information to a mobile station (MS 1 , MS 2 ) is handed over from at least a first...
6381289 Demodulation method in high speed asynchronous time division multiplexed packet data transmission  
A method of demodulating a communication signal is provided. The communication signal includes a plurality of pages with each page having a plurality of addresses and corresponding data packets....
6377692 Method and system for controlling key for electronic signature  
Two keys which are updated in the same updating cycle at different times are prepared as signature keys (main key and auxiliary key) for electronic signature, and the updating cycle of each key is...
6377558 Multi-signal transmit array with low intermodulation  
A transmitter is provided for simultaneously transmitting a plurality of signals in a plurality of directive beams to corresponding destination stations, each destination station located in a...
6370380 Method for secure handover  
In a mobile, wireless telecommunications network, communications relating to a mobile terminal can be protected during a handover of the mobile terminal from a first access point to a second access...
6285871 Cellular fraud prevention using selective roaming  
A method of preventing roaming fraud in cellular telephone systems using different levels of roaming privileges for individual subscribers. When the subscriber initiates a call in a foreign service...
6256514 Secure radio personal communications system and method  
A secure radio personal communication system and method includes a base station which relays cellular verification signals between a wide area cellular network and a cellular terminal via the wire...
Matches 1 - 50 out of 157 1 2 3 4 >