Abstract: A digital to analog converter (DAC) for a communications system with reduced intersymbol interference incorporates dynamic element matching (DEM) with a matching element array having 2M bits for an input corresponding to M+1 levels thereby employing only one half the range of the DEM and array to produce the DAC output.

Abstract: A base station for compensating a fixed route delay between a base station and a mobile station of a CDMA mobile communication system and an operation method thereof are disclosed.

Abstract: Disclosed is an apparatus and a method capable of processing low-speed circuit data lower than 64 kbps and high-speed packet data higher than 64 kbps in which a high-speed data network is constructed by converting an LCIN (local CDMA (code division multiple access) interconnection network) for supplying a communication path of packet data among sub-systems in a BSC (base station controller) of CDMA system to an ATM (asynchronous transfer mode) for processing high-speed data, installing a TSB (transcoder selector bank) or an SDU (selector distribution unit) for processing high-speed packet data higher than 64 kbps in the BSC, and linking an ATM switch to an MSC (mobile switching center) to provide a high-speed data service with respect to other network.

Abstract: A method for repeating data transmission between a reception side and a transmission side in a radio communication system wherein the transmission side includes a first upper layer and a first layer 1 and the reception side includes a second upper layer and a second layer 1 includes the steps of: by the transmission side, measuring a radio environment; determining to perform repeated transmission or normal transmission based on a measurement result; and if it is determined to perform the repeated transmission, by the first upper layer of the transmission side, performing a first data processing; by the reception side, receiving data from the transmission side and determining if the repeated transmission or the normal transmission was performed; and if the repeated transmission was performed, by the second layer 1 of the reception side, performing a second data processing.

Abstract: A system for controlling an international mobile telecommunications—2000 (IMT-2000) base station includes: a base transceiver station (BTS) for providing asynchronous transfer mode (ATM) cells; an asynchronous transfer mode (ATM) switch for performing a switching of the ATM cells; and a BTS interface subsystem (BIS) for interfacing the base transceiver station (BTS) with the asynchronous transfer mode (ATM) switch, wherein the BTS interface subsystem (BIS) includes a plurality of assembly symbol subsystems (ASSs) for receiving the ATM cells transmitted from the base transceiver station (BTS) and performing a type conversion of the ATM cells to output a type converted ATM cells to the asynchronous transfer mode (ATM) switch.

Abstract: A method for supporting a multi-call in an IMT-2000 system providing a plurality of services including a voice communication service, a moving picture service and a radio internet service, wherein the IMT-2000 system includes one or more mobile stations, one or more radio networks and one or more core networks includes the steps of: in response to a call request of the mobile station, transmitting an origination message to the radio network; generating a CM service request message based on the origination message and transmitting the CM service request message to the core network; determining whether the call request is an initial call request or an additional call request based on the CM service request message, wherein the additional call request means a request of an additional traffic channel for using other service; generating one or more traffic channels for the mobile station; and storing a first identity for the mobile station and a second identity for an assigned traffic channel in a storage unit.

Abstract: Permission information (110), including a security parameter index SPI and a digital signature (120), form a digital rights key (140) in a digital rights management system. The security parameter index SPI identifies and algorithm for digital signature calculation (130) and of the digital rights key (140). A digital rights source generates the digital rights key (140) using the security parameter index SPI for digital rights management of licenses to an application. A digital rights client receives the digital rights key (140) and interprets it using an algorithm identified by the security parameter index SPI.

Abstract: A multilevel hierarchical feature rights management system (100) provides an efficient way of allocating feature keys. Sub-agents (140) are provisioned or activated with application software having features. The sub-agents request permissions from feature rights management agents (120) to use these features. The feature rights management agents (120) receive feature keys over a network (130) from a feature rights server (110). The feature rights management agents (120) then permit sub-agents (140) to use their provisioned features. In a further aspect of the invention the sub-agents (140) voluntarily release feature permissions rather than the server (110) or the agents (120) forcing the sub-agents (140) to revoke rights.

Abstract: Communications system comprising a set of interface devices adapted to be coupled to a public switch telephone network (PSTN) and radio transceivers. The interface devices are configured to serve in various geographic regions. The radio transceivers are coupled to the interface devices in the set of interface devices. The radio transceivers are for communication with mobile subscribers. The mobile subscribers each have a home region. The circuitry coupled to the set of interfaces routes a call through a path including an interface device that serves the mobile subscriber's home region, for a call involving the PSTN and a mobile subscriber located outside the mobile subscriber's home region.

Abstract: A method for providing interactive wireless gaming using standard wireless communication devices comprising; receiving a target identity and a delivery location for a game related action from a first game subscriber, wherein the target identity corresponds to a second game subscriber; determining an actual location of the second game subscriber; comparing the actual location of the second game subscriber to the delivery location; and performing game related actions based on the comparison.

Abstract: A mobile communications system including a plurality of base stations. The system includes a plurality of mobile telephones. Each mobile telephone communicates with at least a base station from the plurality of base station using a timeslot and a frame. The frame has a plurality of timeslots for the base station to use to communicate with the various of the plurality of mobile telephones in a cell covered by the base station. Each mobile telephone has a single radio capable of communication on various frequencies. The radio is not capable of communicating on different frequencies on adjacent timeslots in a frame. A mobile telephone may establish communication with a first base station on a particular timeslot in a frame. If another timeslot is available in the frame in a second base station, communication may be established with the second base station on another timeslot in the frame.

Abstract: A method and apparatus for interfacing a synchronous core network with an asynchronous radio network in a next-generation mobile telecommunications system is disclosed.

Abstract: A system and method of communicating between a central office and a plurality of subscriber sites. Subscriber sites are separated into frequency groups. Each group spans a distance along the cable such that no more than a predetermined amount of attenuation is required to equalize the signal power of signals sent from a site in the group. Frequency groups closer to the central office are assigned higher frequency bands than frequency groups farther away from the central office. The central office includes a plurality of filters, each of which has a passband for passing the frequency band of a group and a stop band that substantially attenuates the frequencies of the other groups. The frequency group nearest the central office has no filter. The passband of a filter may also provide any needed attenuation to assure that signals arriving at the central office have approximately the same power levels.

Abstract: A mobile node may roam away from its home network to a foreign network. The mobile node may communicate using the Mobile Internet Protocol, and it may use Internet Protocol security to communicate with its home network. A foreign agent on the foreign network and a home agent on the home network may dynamically link a policy to be used for a Internet Protocol security session between the foreign agent and the home agent. The foreign agent and the home agent may dynamically create a filter to be used for the Internet Protocol Security session.

Abstract: A method and apparatus for providing roaming and hand-off support for prepaid billing for wireless prepaid services on a data network may be provided by a first-network-access device carrying on session activity of a wireless communication session with a wireless-mobile node within a first coverage area. The first-network-access device receives blocks of credits drawn from a user account having a cache of available credits for the prepaid-services. The first-network-access device periodically measures usage of the session activity in terms of a first of a plurality of measurement-method parameters. The first-network-access device debits the usage of the session activity from the blocks of credits. After entering its coverage area, the second-network-access device establishes connectivity with the wireless-mobile node. The first-network-access device tunnels to the second-network-access device the session activity and any unused credits.

Abstract: An apparatus and method for retaining a length of fiber optic cable to a circuit board includes a spool-shaped retention apparatus. A body portion of the apparatus includes a channel formed about the periphery of the body portion for receiving and retaining a portion of the length of fiber optic cable in an arc having a radius greater than a minimum bend radius of the fiber optic cable. A plurality of legs extend from the body portion, each of the legs is adapted to be received in a mounting opening formed in the PC board. Each of the spaced legs may include a foot portion adapted for securing the body to the circuit board.

Abstract: A method and system for establishing and using a unidirectional virtual tunnel with foreign service applications (e.g., Session Initiation Protocol (“SIP”), H.323, etc.) on a foreign network for a mobile node (e.g., a Mobile Internet Protocol (“IP”) node) that has roamed from a home network to the foreign network. The unidirectional virtual tunnel overrides a default communications path from foreign service applications on a foreign network to a home agent on home network and to a mobile network device on the foreign network and creates a new communications path from the foreign service applications to a tunnel server on the foreign network, to the foreign agent and to the mobile network device on the foreign network. The method and system may help reduce the round-time trip delays encountered when trying to establish a voice, video or data call (e.g.

Abstract: A location update protocol is provided for use in a mobile communications network having a distributed cache for managing subscriber profile information associated with each of a plurality of subscribers of the network. The network includes a plurality of base stations each including a memory unit having a local database for storing: a local subscriber list including a plurality of locally owned cache entries each having an associated subscriber key value, and an associated locally owned subscriber profile; and a global subscriber list including a plurality of global cache entries each having an associated subscriber key value, and an associated location value indicating a node in the network at which an associated subscriber profile is stored. Each of the base stations is operative to transfer and copy selected ones of the cache entries to other ones of the base stations for the purposes of managing and accessing the distributed cache.

Abstract: The present invention provides a method for testing and diagnosing a cable modem termination system, using a hand-held computing device. The hand-held computing device establishes a connection with the cable modem termination system through a wireless infrared and radio frequency connection, a serial, or a local area network connection. After the connection is established, a set of commands residing in the hand-held device are transmitted to configure the cable modem termination system. The cable modem termination system sends back a response that is displayed on a command screen of the hand-held device to identify status and error messages. A cable modem termination system operator can send a set of configuration instructions to the cable modem termination system by utilizing stored sets of configuration instructions. Using the hand-held device allows easy accessibility in remote locations with limited space for diagnostics and equipment.

Abstract: A mobile Internet Protocol service provider system implements home agent functionality in two separate devices. One device, the home registration agent, is devoted to registration of the mobile node and session control. The other device, the home tunneling agent, is devoted to tunneling and routing functions for the foreign agent. The home registration agent can be a general purpose computer. The home tunneling agent is preferably implemented in a robust routing device, such as an IP switch or router. Multiple home tunneling agents or home registration agents can be implemented in the respective devices as multiple instantiations of a home registration agent or home tunneling agent software program.