Abstract: A system and method are provided for controlling the gain of signals transported over transmission media in a distributed antenna network. The system includes a plurality of remote antenna units where each remote antenna unit includes a signal level comparator for comparing the level of the signals received by the respective antenna unit with a predetermined reference level, and a gain controller for reducing the gain of the remote antenna unit when the signal level comparator determines that the level of the received signal exceeds said predetermined reference level. The system may accommodate TDMA systems when a gain controller is used that is fast enough to respond within the time slots of the received signals. As a result, the signal levels output from the remote antenna units are prevented from exceeding a maximum signal level.

Abstract: The present invention aims at implementing acceleration of the hop-by-hop transfer without using a high-speed processor. In the present invention, a transfer destination searching circuit (12) constituted by hardware is provided in addition to a processor (11). In the transfer destination searching circuit (12), after header information has been extracted from received IP packet data, a content addressable memory (21) is first searched by using the header information as a key. If corresponding forwarding information cannot be obtained from the searching of the content addressable memory (21), HASH function searching is executed by employing an HASH searching pointer table (22). If the forwarding information is obtained from a forwarding table (23) as a result of these searching operations, the hop-by-hop transfer of the IP packet data is executed in accordance with the forwarding information.

Abstract: A mobile station for the transmission of communication information. The communication information transmitted by the mobile station also includes text information so that it is possible to transmit specific text messages to a base station or to a desired receiver. In order to facilitate the production of the text messages to be transmitted, a number of text messages are predetermined, in which case the predetermined text messages also can be changed, at least partially, and added to. The predetermined text messages are stored in an appropriate memory in the mobile station.

Abstract: A detector selector and method are provided for selecting among detectors, where a less complex detector detects known symbols in a received signal, and a bit error rate for the known symbols is used to determine whether the less complex detection method is sufficient. If the less complex detector is not sufficient, a more complex detector is used to detect the signal. Additionally, assured symbols are used as known symbols to increase the accuracy for the determination of whether the less complex detector is sufficient.

Abstract: National mobile networks are provided with a proxy location register for storing user identities in association with respective network identities. Users have an associated “mobile home” for storing call handling instructions and messages recorded by a Voicemail system. When a user roams from a current host network to a visited network, he may request that his mobile home be moved from its current location, most likely that current host network, to the visited network, and retrieval of any messages that have been left for that user can now be done without involving real-time use of international links between networks. Furthermore, when the mobile home has moved, its new location, with or without call handling instructions, can be manually or automatically notified to all other networks, or a subset, for location register updating.

Abstract: A mobile phone charger also functioning as a remote sound monitoring device is provided. The charger internally includes a high-sensitive microphone, a DTMF decoder, and a central processing unit (CPU). When a handset of a mobile phone is disposed in a handset w/battery charging socket on the charger, an in-car hand-free enabling circuit in the charger is enabled for the handset in the charger to charge while entering into a hand-freemode. At this point, the charger substitutes for the handset and the CPU in the charger automatically receives signals of in-coming call over the mobile phone and the mobile phone does not ring. On receipt of a signal of an in-coming call, the CPU prompts the caller to enter a code that is decoded and compared by the DTMF decoder with a code preset in the CPU.

Abstract: Provided is a system, method, and computer program for transmitting, across a mobile communication network, the occurrence of silence in a communication channel. The system generally comprises a first Media Gateway (MGW), which could be a transmission control node (first TCN), for executing a silence transmission algorithm, and a second MGW, such as a second transmission control node (second TCN), for executing a comfort noise generating algorithm. One method detects silence in a communications channel and then transmits a network silence indicator (SID). Another method receives the network SID and then produces a comfort noise. The computer program utilizes a query module for detecting a comfort noise production module in a destination MGW, and a network SID transmission module to send a network SID across a PLMN.

Abstract: In response to determining that the total uplink (UL) interference in a cell has exceeded a predetermined threshold or value, a base station (BS) instructs a plurality of the mobile stations (MS) currently operating in the cell to reduce their current UL power by a predetermined amount (e.g., value of dB or percentage). Such instruction may override conventional closed loop PC instructions to the mobiles in certain embodiments. In such a manner, the UL power reduction is shared in a fairly equal manner by all mobile stations in the cell and overload can be reduced and/or avoided. Subsequently, mobiles stations moving away from the BS toward the cell border may be permitted to increase their UL power so as to maintain a connection. In certain embodiments, the invention is utilized in the context of a code division multiple access (CDMA) system.

Abstract: Synchronization is effected in a cellular telecommunications network between a timing unit located at control node (e.g., RNC) of the network and a slave timing unit (STU) located at a controlled node (e.g., base station) of the network. Upon determining that a synchronization adjustment of the slave timing unit is necessary, an adjustment signal (e.g., voltage signal) is caused to be input to the oscillator of the slave timing unit in order to change the frequency of the slave's oscillator. Frame counter(s), in communication with the oscillator at the slave timing unit, will thus follow the oscillator continuously with smooth phase adjustments. By avoiding a direct adjustment of the frame counter(s), undesirable phase jumps or steps are avoided that can potentially disturb the air-interface between a base station and mobile station (MS).

Abstract: An apparatus and method for extending the service area in a mobile communication system is provided, in which the service area is defined with a normal mode or an extension mode based on a distance between the base station and the mobile station and, in case of the extension mode, a transmission clock used by the mobile station for transmitting signals is changed, thus extending the service area. The access is attempted in the normal mode, and the transmission clock for transmitting the mobile signal is advanced the initial delay in the extension mode when the access fails. The access is reattempted with repeating the control of the transmission clock until the number of times of the access attempt reaches a predetermined number of times. When the number of times of the access currently attempted is greater than the predetermined number of times, the extension mode is converted to the normal mode, returning to the initial state.

Abstract: A wireless infrared peripheral interface for a communication device having a cellular radio transceiver includes a peripheral interface. The peripheral interface includes at least one infrared signal source and at least one infrared detector. The signal source and detector are coupled with dispersing optics. An interface circuit is coupled to the infrared signal source and detector. A processor is coupled to the interface circuit, wherein the processor controls the interface circuit to process data signals that are conveyed through the infrared source and detector so as to communicate with a peripheral device that is proximate to the communication device. The dispersing optics reduces the dependency of optical alignment between the infrared data ports of the peripheral device and communication device.

Abstract: A communication device (10) with a dual-sided liquid crystal display (12) located with a housing (14) having two viewports (18,22). The display (12) includes a liquid crystal panel (50) with an associated driver circuit (52). The panel (50) has a first side (60) for viewing a top portion (62) of the display (12) from the first viewport (18) and a second side (64) for viewing a bottom portion (66) of the display (12) from the second viewport (22). A top reflective layer (68) is disposed on the top portion (62) of the panel (50) on the second side (64) of the panel (50). A bottom reflective layer (70) is disposed on the bottom portion (66) of the panel (50) on the first side (60) of the panel (50). A processor (82) is coupled to the driver circuit (52), wherein the processor (82) directs the display (12) through the driver circuit (52) to provide user interface information for operating the communication device (10).

Abstract: The invention is concerned with a method in a telecommunications terminal, e.g. amobile phone, comprising an identification module with several subscriber numbers, of invoking desired services provided by different service providers. In the method a category of an incoming or outgoing call can be determined. A desired service is selected, in accordance with the category determined, among the services provided by a service provider associated with the mobile phone through service access numbers stored in the module. There is called to a service access number of the service provider providing a desired service in accordance with a certain call handling function by means of which the desired service can be invoked and charged in different ways, whereafter the service provided by the service provider is invoked. The invention is also concerned with a telecommunications terminal and the use of the terminal in different roles, such as a private person, an employee and as a member in different organizations.

Abstract: A method and apparatus for selecting among calling options in a wireless communications device is provided. A determination is made as to whether a calling option mode is to be selected, and if the calling option mode is selected, a plurality of calling options are displayed. The user selects a calling option from the plurality of displayed calling options, and a call is originated as a function of the selected calling option. The calling options include originating a call billable to a calling card account, originating a call using a paging service, and originating a call using a text messaging facility. A displayed set-up option corresponding to a calling option set-up facility is also provided.

Abstract: A network system capable of changing the billing rate for a telecommunication service includes Service Switching Point (SSP) (7) and a Service Control Point (SCP) (9). The SSP (7) implements call management by performing switching functions for placing a call, and implements service selection functions by detecting service indicators associated with the call. The SSP (7) also activates interactions with the SCP (9), which contains logic programs used for providing the indicated service. Signaling System 7 (SS7) of the Common-Channel Interoffice Signaling (CCIS) system is used for digital signaling between the SCP (9) and the SSP (7). When a user initiates a call, the SSP (7) acquires user data and trigger information from a Service Data Base (SDB) (11) associated with the SCP (9). During the call, when the SSP (7) detects that a trigger corresponding to the trigger information has been activated, the SSP (7) subsequently activates a SCP whose address the activated trigger gives.

Abstract: Disclosed is a calling number delivery system in which an exchange and a base station are connected via an analog line and FSK modulated calling number information is transmitted to the base station. In the base station, the calling number information is read from the FSK modulated signal by an FSK demodulating circuit and an information extracting circuit and is transmitted to a subscriber's station over a control channel. The calling number information is sent to an FSK modulating circuit, modulated into an FSK modulated signal, and the FSK modulated signal is transferred to a telephone.

Abstract: An antenna circuit configured for use in a radio frequency data communications device has an antenna constructed and arranged to transfer electromagnetic waves, the electromagnetic waves corresponding to a signal carried by the antenna and generated from a signal source. A Schottky diode is electrically coupled in serial relation with the antenna, and in operation the signal is applied serially across the antenna and the diode in direct relation with electromagnetic waves transferred by the antenna. A bias current supply is also electrically coupled to the Schottky diode and is configurable to deliver a desired bias current across the current. The diode is responsive to the bias current to realize a desired diode impedance such that a desired impedance match/mis-match is provided between impedance of the diode and impedance of the antenna when the signal is applied across the antenna circuit, which selectively tunes the antenna circuit by imparting a desired power transfer therein.

Abstract: A two transistor mixer for mixing radio frequency signals in a communications device. A mixer core section comprised of a pair of matched semiconductor devices having their drain ports connected to a first common node through matched load resistors and their source ports connected to a second common node end. A local oscillator (LO) signal input connected to the first and second nodes, wherein the connection to the second node is through a current source. A radio frequency (RF) signal input connected to the gate ports of said pair of semiconductor devices and an intermediate frequency (IF) output obtained from the drain ports of said pair of semiconductor devices.

Abstract: A system for assign a cellular site to provide wireless telephone service to a mobile telephone set based upon two criteria. This invention assigns a cellular site to provide service based upon a primary criteria, such as signal strength between the cellular site and the mobile telephone set. A secondary criteria, such as load of the cellular site, is then checked to determine whether a threshold has been exceeded by the assignment of the cellular site to provide service. If the threshold for the secondary criteria is exceeded by the assignment, another cellular site is assigned to provide service to the mobile telephone set.

Abstract: An apparatus for reducing the amount of circuitry required to process satellite communication signals uses a beamformer to reduce the number of signals coupled to the communications circuitry, thereby reducing the amount of communication circuitry required to process received signals.