Abstract: A method and apparatus enabling a mobile user device (102) to anonymously access a network (108, 114) in circumstances where access to the network is prohibited that includes an interim identity generator (138), positioned in the mobile user device, generating an interim international mobile subscriber identity (IMSI) in response to access to the network being prohibited. The interim IMSI is utilized for signaling exchanges requiring information corresponding to a SIM card (142) when access is prohibited. A user identity module (152, 154) detects the presence of the interim IMSI in a signaling message, and routes the signaling message to a first home location register (156), in response to the signaling message including the interim IMSI, which then computes and transmits an authentication triplet to the mobile user device. The user identity module routes the signaling message to a second home location register (150) in response to the signaling message not including the interim IMSI.

Abstract: A method and apparatus enabling a mobile user device (102) to anonymously access a network (108, 114) in the absence of a subscriber identity module (SIM) card (142) that includes an interim identity generator (138), positioned in the mobile user device, generating an interim international mobile subscriber identity (IMSI) in response to the SIM card not being positioned within the mobile user device. The interim IMSI is utilized for signaling exchanges requiring information corresponding to the SIM card when the SIM card is not inserted within the mobile user device. A user identity module (152, 154) detects the presence of the interim IMSI in a signaling message, and routes the signaling message to a first home location register (156), in response to the signaling message including the interim IMSI, which then computes and transmits an authentication triplet to the mobile user device.

Abstract: A communication system for exchanging session initiation protocol signaling messages between a user host associated with a wireless communication device, and a remote user host, through a network, and method therefor. A multiplexer module positioned within the wireless communication device multiplexes call control data, session initiation protocol commands, and packet data setup and status transmitted between the wireless communication device and the network. A control module located in the multiplexer determines whether a packet associated control channel has been set up, and, in response to the packet associated control channel not being set up, the multiplexer module utilizes a slow dedicated control channel for transmitting signaling associated with requesting a packet associated control channel for transmitting the session initiation protocol commands.

Abstract: A communication system for exchanging session initiation protocol signaling messages between a user host associated with a wireless communication device, and a remote user host, through a network, and method therefor. A multiplexer module positioned within the wireless communication device multiplexes call control data, session initiation protocol commands, and packet data setup and status transmitted between the wireless communication device and the network. A control module located in the multiplexer determines whether a packet associated control channel has been set up, and, in response to the packet associated control channel not being set up, the multiplexer module utilizes a slow dedicated control channel for transmitting signaling associated with requesting a packet associated control channel for transmitting the session initiation protocol commands.

Abstract: A method for developing system resource usage "cost" equations, creating models based upon such cost equations, and estimating total system resource usage and computer program product incorporating such cost equations. A server application is analyzed and certain transactions are defined therein that occur in response to interaction with a client application that in many instances originates from user behavior. System resources are also identified and resource usage measurements are determined for each transaction. One way of determining the resource usage measurements is by creating a load of a particular transaction on an "instrumented" server application and measuring the resources used in connection with the transaction. Cost equations for each type of system resource can then be constructed taking a component from each transaction that uses a particular system resource so that the cost equations are defined in terms of transactions.