Abstract: The synchronization system uses a TDMA or AMPS air interface to provide timing synchronization between previously unsynchronized base stations. The synchronization of base stations is critical between when determining the geographical position of a mobile because the geographical position is determined using a time difference of arrival method. In order to synchronize a remote base station with a serving base station, the remote base station receives a signal from the serving base station and measuring the receiving time of the signal at the remote base station in relation to the clock of the remote base station. The synchronization system determines the transmission time of the signal based on the reception time of the signal and the distance between the base stations, in relation to the clock signal of the second station, and synchronizes the clock of the remote base station to the clock of the serving base station based on the offset in the clock cycles at the time the signal was transmitted.

Abstract: A transmitter directed, distributed receiver using path diversity provided by the distribution of the receiver. Advantage is taken of the uncorrelated variations over time in the condition of channels between a common transmitter and several users. The greater the variation in the channel condition of a particular channel over time, the greater the increase in total system throughput provided. An access metric represents the instantaneous channel condition of the communication system between each user and the transmitter with respect to the average channel condition of each channel. Alternatively, the access metric represent the instantaneous channel condition with respect to the average data throughput over that channel. The common transmitting station uses the access metric to directly compare the desirability of granting each channel access with the desirability of granting each other channel access. The user that has the greatest access metric is provided access to the channel.

Abstract: A method and an apparatus for saving current in mobile multi-mode communication terminals, in which the frequency of searching (scanning) for available communication networks is varied as a function of information about the local availability of the communication networks.

Abstract: A system and method for extending the range of a base unit is disclosed. The system can include repeaters and/or network decoders, each of which is housed in a network module. The network module includes a first portion for insertion into a powered outlet. The first portion receives power from the powered outlet. The network module further includes a second portion for receiving a powered device, and an electronic housing that is coupled to the first and second portions. The electronic housing encloses an electronic unit for receiving power from the first portion and selectively providing power to the second portion. The electronic unit can also include a repeater for receiving commands and re-broadcasting the commands, and/or an active network device for receiving commands, decoding the commands, and controlling at least one device based on the command. The electronic unit can receive signals and transmit signals via a wired connection or a wireless link.

Abstract: The method has steps of (a) formulating a request in a mobile station (10) for a particular type of service (an Advanced Personal Service or APS request) that is offered by a network (32) for a particular subscriber or that is offered by another party; (b) transmitting the request to the network over a radio channel; (c) interpreting the request and, based on the interpretation, determining contact information (such as a telephone number of a data network address) for a destination location that will fulfil the request; and (d) using the determined contact information, connecting the mobile station to the destination location. In one embodiment the contact information is found in a database (33), while in another embodiment the contact information is created by modifying a telephone number sent with the request (e.g., the called subscriber's normal telephone number) into a second telephone number (e.g. the called subscriber's voice mail number).

Abstract: A service provider such as a physician or an automobile mechanic is identified from a wireless communicator based on categories of service providers such as physicians or automobile mechanics. In particular, a radiotelephone call is initiated from the wireless communicator to a first telephone number that corresponds to a first service provider of a first category, for example a first physician. The wireless receiver then detects that the radiotelephone call is not successfully completed, for example by detecting that a busy signal is obtained from the first telephone number, by detecting that a radiotelephone call to the first telephone number is repeatedly initiated during a predetermined time and/or by detecting that radiotelephone calls to multiple telephone numbers corresponding to service providers of the first category are initiated during a predetermined time.

Abstract: The invention relates to a method for handing over a connection between a first (NW1) and a second mobile communication network (NW2) in a wireless terminal (MS1). In the method, at least one data transmission connection is established for the purpose of transmitting information between the wireless terminal (MS1) and one said mobile communication network (NW1, NW2). In the first mobile communication network, the connection type is either connection-oriented (HSCSD) or connectionless (GPRS), and in the second mobile communication network (NW1, NW2), at least two traffic classes with different transmission features are defined and one of them is selected for the data transmission connection of the second mobile communication network (NW1, NW2). In the method, it is also examined what active data transmission connections the wireless terminal (MS1) has to the mobile communication network (NW1, NW2) handing over the connection.

Abstract: A multifunction new-type audio player structure which in addition to a vehicle audio system can be utilized with ordinary radios, mobile telephones, and wireless transceivers. The audio recording section of the present invention stores music in a computer compressed format in a memory device and then the memory device is placed in a radio wave controller and conveyed by normal radio wave transmission for reception by a vehicle audio system, mobile telephone, or wireless transceiver to achieve upgraded audio performance.

Abstract: A system for processing a call between a mobile services switching centre (MSC) and a gateway mobile switching centre (GMSC) includes a first alternative gateway unit (ANG) being connected to the mobile services switching centre and a second alternative gateway unit (ANG) being connected to the gateway mobile switching centre. A call which is to be processed via an alternative network (AN) is processed directly between the alternative gateway units (ANG). The alternative gateway units (ANG) include means for performing speech and data coding and means to transmit and receive a call to be able to process the call directly via the alternative network, e.g. a Voice-over-IP network.

Abstract: A communication device locates a preferable wireless service provider in a multi-service provider environment using a frequency band search schedule. Initially, the communications device registers with a less preferred service provider in a first frequency band. While remaining registered with the less preferred service provider, the device examines several frequency bands in the order specified by the frequency band search schedule. A frequency band is examined by dividing the frequency band into many sub-bands, and by locating the strongest signal above a threshold within the sub-band being examined. The examination continues until a second frequency band having a more preferred service provider is located. The communication device then registers with the more preferred service provider. The category of service provider may be identified and displayed on the communication device.

Abstract: A method of operating a mobile telephone within a geographical area having overlapping coverage from a first, GSM, network and a second, UMTS, network, where said GSM network is the home network (HPLMN) of the mobile communication device and said GSM and UMTS networks provide respective first and second sets of services in said geographical area. The method comprises registering the telephone with the GSM network when a service of said first set is requested and registering the device with the UMTS network when a service of said second set, but not of said first set, is requested. The method provides the mobile telephone with a roaming for service function.

Abstract: A method and apparatus for arranging transmission of overhead messages on the paging channel of a wireless communications system is described. Certain paging channel slots are established, based on a timing reference, that must contain an overhead message. In the intervening slots or slot fragments, the base station transmits mobile-directed messages, when they are available. When no mobile directed messages are available for transmission, the base station selects an overhead message from a queue for transmission on the intervening paging channel slot or slot fragment.

Abstract: An RF wireless communication system operating in the presence of a periodic noise environment, includes first and second wireless devices, each such device having: a source of power; a transceiver coupled to the power source, for transmitting and receiving wireless information; a controller/CPU for controlling the operation of the transceiver; means for detecting and mapping the presence of the RF radiated periodic noise; and means responsive to the mapped periodic noise for controlling the operation of the transceiver to communicate with the other wireless device during the quiescent periods of the radiated RF periodic noise.

Abstract: A method of communicating FSK-modulated Caller ID signals through a network incompatible to the transmission of these signals is presented. A first network component couples between the incompatible network and a Central Office, and a second network component couples between the incompatible network and the telephone. In one embodiment, the call flow proceeds until the second network component would ring the line of the called party. The second network component seizes the line but does not apply a ringing signal. The second network component continues with the call flow as though the second network component had entered the silent interval after the first ring cycle at the called party. Subsequently, the CO transmits the FSK Caller ID information to the first network component which detects the FSK transmission and converts it into an out-of-band message and transmits the out-of-band message over the incompatible network to the second network component.

Abstract: A telecommunications system and method is disclosed for decreasing the average call setup time in a cellular network by using an Internet Protocol based cellular network. Call information (such as routing information, channel types, etc.) for a particular call initiated by a calling Mobile Station (MS) can be stored in a call cache within a serving Mobile Switching Center (MSC) to immediately allow the same call to be re-established without tying-up circuits. A call cache identifier (CCI) is assigned to that call cache and passed to the calling MS. When the MSC receives a call from the calling MS, the MSC determines whether a CCI is included with the call. If not, call setup proceeds as normal, and the MSC creates a call cache for the call, assigns a CCI to the call cache and returns the CCI to the calling MS. If a CCI is received with the call, the MSC accesses the call cache associated with the received CCI, and uses the call setup information stored in the call cache to re-establish the call.

Abstract: The invention relates to identifying a TRAU frame in a mobile telephone system. A subscriber terminal normally transmits to a network part a speech frame to be placed in the TRAU frame, and when using discontinuous transmission, the subscriber terminal transmits to the network part a SID frame to be placed in the TRAU frame. A TRAU frame is currently identified in the network part on the basis of the sum of summed up SID code word bits as a speech frame, a SID frame or a SID frame corrupted on the radio path. In accordance with the invention, in addition to the SID code word bits, the other TRAU frame bits that normally contain speech, except for the SID parameter bits representing background noise, are summed up in the sum. Instead of the previously used 95 bits, 210 bits are used. The invention is preferably implemented by software changes in a channel codec.

Abstract: In one aspect of the present invention, a method and apparatus are provided for tracking a plurality of frequency-shift-key modulated signals in a communications device. The method includes determining a first threshold value for a first input signal of the plurality of signals, comparing the first input signal to the first threshold value and providing a first output signal. The method includes determining a second threshold value for a second input signal of the plurality of signals, and retaining at least a portion of the first threshold value while determining the second threshold value.

Abstract: A DECT fixed part for providing a communications link between a DECT portable part and a GSM mobile switch center, the fixed part comprising a compression negotiation means for: receiving from one of the portable part and the mobile switch center a first message specifying a form of compression for a data service; and using that first message, determining a second message to be sent to the other of the portable part and the mobile switch center to request it to adopt a corresponding form of compression for the data service; so as to allow the provision of a compressed data service between the portable part and the mobile switch center.

Abstract: An MSAT system is provided which optimizes satellite resources when implementing a single-hop TtT call. The system allocates satellite channels and signaling channels for a single-hop TtT call to the participating terminals at an early stage during the call set-up procedure such that only a single pair of satellite channels are assigned to each of the terminals for call establishment and for use during the call, as opposed to two pairs of satellite channels. A test message for signaling channel (e.g., TTCH) validation is transmitted from the network (e.g., from a gateway station controller) to each of the terminals.

Abstract: An information communication terminal with a charging management function includes a storage section, a message creation section, a pager call number adding section, an output section, and a management section. The storage section receives and stores an incoming message of a radio signal transmitted from a base station. The message creation section edits the contents of the stored incoming message or creates a new message. The pager call number adding section adds the pager call number of the destination to message information edited or created by the message creation section. The output section outputs the message information and the pager call number of the destination as information data through a push-phone. The management section supervises the destination of the information data and performs charging management.