Abstract: A broadband frequency synthesizer including a first local oscillator signal generated in a first phase locked loop. A second local oscillator signal is generated in a second phase locked loop. Third and fourth phase locked loops provide inputs to the second phase locked loop to control the second local oscillator frequency. The system and method provides for small step size tuning while maintaining wide phase lock loop bandwidth.

Abstract: A transmitter for a cellular phone comprising an antenna and being operable at a first radio frequency band and a second radio frequency band is disclosed. In one embodiment, the transmitter includes a first power amplifier and a second power amplifier. The first power amplifier has a first input for a first signal at the first radio frequency band and a first output for an amplified first signal, the first output being connected to the antenna. The second power amplifier has a second input for a second signal at the second radio frequency band and a second output for an amplified second signal, the second output being connected to the antenna. The transmitter further comprises a single control module which is associated with the first and second outputs of the power amplifiers and comprises a logarithmic detector. The control module generates a control signal which is a function of an amplified signal and a reference signal in order to control the two power amplifiers.

Abstract: In a wireless telephone, when an operation such as opening or closing of a front flip cover or a key operation of communication-start or communication-end occurs, a controller obtains information for extraction or retraction of an antenna. Based on the above information, the controller controls a motor-driving by intermittently supplying a motor-driving signal by which the motor can rotate clockwise or counterclockwise during a preset time necessitated for fully extracting and retracting an antenna. While motor-driving, if a blocking force is applied to an antenna, the controller repeatedly stops supplying of the driving signals to the motor for a predetermined interval and then resumes supplying the signals. A gear unit is tightly coupled in a body with the motor, receives a rotating force from the motor shaft, and extracts and retracts an antenna.

Abstract: A wireless communication system facilitates wireless communication with a mobile unit operating within a respective service area. The wireless communication system includes a mobile switching center and a plurality of base stations with each base stations coupled to the mobile switching center and providing wireless coverage within a respective portion of the service area. The mobile unit wirelessly connects to at least two of the base stations (or sectors of the base stations) that transmit to the mobile unit via respective forward links at respective transmit levels. These respective transmit levels are based upon forward link requirements of the mobile unit. The mobile unit transmits to the at least two base stations/sectors via a respective plurality of reverse links. Forward link transmit levels may be determined based upon the quality of corresponding reverse link transmissions or from the quality of pilot signals or forward link transmissions received by the mobile unit.

Abstract: Interoperability between terrestrial cellular systems and satellite based cellular systems allows handoffs between different cellular systems. A call in progress by a subscriber unit (101) over a terrestrial based cellular system (100) which includes a mobile switching center (MSC) (105a) and a plurality of base stations (103a-d) is handed off to a satellite based cellular system (1000) comprising a satellite network (100a, 1001b), a regional gateway (1007) and an interface gateway (1005). A call in progress by subscriber unit (101) over satellite based cellular system (1000) is also handed off to terrestrial based cellular system (100). A dual mode subscriber unit (400) provides switching functionality (409) to switch between transmit modes.

Abstract: A system and method for transmitting a radio frequency (RF) signal in a RF bandwidth over a low bandwidth medium, e.g., in-building cabling, which has a transmission bandwidth below the RF bandwidth. The system has a unit for intercepting the RF signal and a global reference oscillator for distributing a global reference tone of high stability to the entire system. Local oscillators are controlled by adjustment signals derived from this global reference tone to deliver RF reference tones of high stability required for mixing the RF signal to obtain an intermediate frequency (IF) signal which is fed through the low bandwidth medium. The global reference tone is preferably delivered through the same low bandwidth medium to desired locations, such as remote coverage sites in a network for cellular communications, cordless telephony, local RF communications, interactive multi-media video, high bit-rate local communications.

Abstract: Signal markers are placed in critical locations within the wireless network. Critical locations are locations where signals from base stations may be weak due to natural or man-made obstruction and locations where user demand for network resources may be particularly heavy. The signal markers collect data such as the signal strength or amplitude of signals from surrounding base stations, and the amount of user demand for access to the network. The signal markers then communicate this data to the mobile switching center. The mobile switching center analyzes the data and, if the data indicates unsatisfactory performance, determines new parameters for the base stations. The mobile switching center then communications the new parameters to each of the base stations where each of the base stations changes its performance in accordance with the new parameters.

Abstract: The present invention relates to service-dependent routing of a mobile-terminating call in a mobile communication system employing a multinumbering scheme. A visitor location register (VLR), as a response to a roaming number request from a home location register (HLR), allocates a roaming number to the call and the roaming number is returned to the HLR and further to a routing exchange (GMSC, EXC) to be used for routing the call to the mobile switching centre (MSC) associated with the VLR. In some cases there may be two different alternative transmission routes between the routing exchange (GMSC) and the MSC. In order to enable the routing exchange to select the appropriate one of these transmission routes for routing the call to the MSC, the roaming number (MSRN) allocated by the VLR contains a part (SERVN) which is dependent on the service required by the call and indicates the appropriate one of the transmission routes (ROUTE.sub.-- 1, ROUTE.sub.-- 2).

Abstract: The method for reducing status reporting in a wireless communication system (100), such as a code division multiple access wireless communication system is described. Wireless communication system (100) includes a mobile switching center (202), a base station controller (204), and a plurality of base transceiver stations (240-242). The method includes wireless communication system (100) receiving a mobile communication signal (115) from a mobile station (220), and based on the mobile communication signal (115), invoking delivery of an information element (230) to base station controller (204). The method further includes, based on information element (230), selectively forwarding by base station controller (204) a status message to mobile switching center (202). In addition, the method includes acknowledging, by base station controller (204), successful receipt of information element (230).

Abstract: A cellular phone network provides location-based information to a user of a cellular phone. The cellular phone network includes a plurality of antennas coupled to at least one server. The server is coupled to a database. Stored on the database is a plurality of location-based information that is indexed to the plurality of antennas. The cellular phone transmits communication signals to one of the antennas. A phone call is established between the server and the user, and the server receives an identification of the antenna that the user transmits to. The server then queries the database and retrieves information local to the user. This information is then presented to the user in the form of menus.

Abstract: A transmitter for a cellular phone comprising an antenna and being operable at a first radio frequency band and a second radio frequency band is disclosed. The transmitter comprises a first power amplifier and a second power amplifier, one of which is active at a time. The first power amplifier has an input for a first signal at the first radio frequency band, an input for a first control signal and a first output for an amplified first signal. The first output is connectable to the antenna. The second power amplifier has an input for a second signal at the second radio frequency band, an input for a second control signal and a second output for an amplified second signal. The second output is connectable to the antenna. The transmitter further comprises a single control module associated with the first and second outputs of the power amplifiers. The control module generates a control signal for the active power amplifier.

Abstract: This invention relates to telecommunication bandwidth provisioning systems in radio telecommunications. Radio-link networks are inevitably constrained by limited availability of radio channels within the radio spectrum assigned to such use. The consequent need of and benefit from optimising management of assignment of radio channels is self-evident. Such need and benefit are emphasised where different usages by the same subscribers have different radio bandwidth requirements. For example, voice calls generally require less radio bandwidth than data transfers via computer modems, and are typically handled by 32 Kilobits per second (Kb/s) and 64 Kb/s radio channels, respectively. The present invention provides a system and method of operating at different bandwidths and of providing a billing system therefor.

Abstract: A telecommunications system and method for a frequency re-use plan is disclosed which reduces the adjacent channel interference between cells, while maintaining good co-channel interference in a four cell frequency reuse plan with a center-excited three sector directional pattern. This can be accomplished by structuring the four cell frequency reuse plan such that no adjacent cells use adjacent channels. As a result, the adjacent channel interference can be minimized, the radio coverage can be extended and in-building penetration can be improved.

Abstract: In a time division multiple access wireless communication system, a wireless radio station performs a timing error compensation method. The wireless radio station receives messages including a synchronisation pattern. The wireless radio station adopts a power down mode between reception of messages, and accumulates a timing error representing an accumulated difference between expected times of arrival of the synchronisation patterns and actual times of arrival of the synchronisation patterns, during a predetermined time interval between reception of successive messages and before an expected reception of a next message. Thereafter, the wireless radio station at least substantially undoes the accumulated timing error, before the expected reception of the next message such that the timing error is compensated before the expected reception of the next message.

Abstract: An environmental sensor distinguishes between a plurality of different ambient acoustic environments and communicates with an audio gain circuit which automatically adjusts the audio characteristics of the speaker and microphone of a wireless communications assembly for more optimum audio performance. The wireless communications assembly preferably includes a hands free adapter coupled to a wireless communications device such as a cellular telephone. The adjustments to the audio characteristics are according to predetermined settings for the identified ambient acoustic environment which are preferably stored in memory associated with the audio gain circuit. In this manner, the audio characteristics are automatically adjusted for the actual ambient acoustic environment that the wireless communications assembly is operating in.

Abstract: A system and method in a radio telecommunications network for interactively providing a calling party with a choice of call handling options when a called mobile station (MS) is either busy or inactive. When a call is received for the called MS in the network, a home location register (HLR) determines the status of the called MS (i.e., whether the called MS is available, inactive, or busy). If the called MS is inactive or busy, the status is sent to a service control point (SCP) which generates a plurality of call handling options based upon the determined status of the called MS. The call handling options are provided to the calling party in an interactive prompting process which may be in the form of a menu display or voice prompting. The calling party then selects a call handling option which is forwarded to the SCP. The calling party may instruct the network to automatically set up a call with the called MS if the called MS is reactivated within a specified period of time.

Abstract: A combination mobile station and cordless wireline cordless base station, each having a different directory number, includes a mobile station that functions in a wireless network as a typical wireless unit. When the mobile station is within radio range of the wireline cordless base station, it retunes its operating frequency to that of the wireline cordless base station. The wireline cordless base station, when it senses that the mobile station is within radio range, notifies the wireless network of the wireline directory number of the wireline cordless base station. When the wireless network receives a call for the mobile station, it forwards the call to the wireline cordless base station over the wireline network.

Abstract: A transmitter for a cellular phone comprising an antenna and being operable at a first radio frequency band and a second radio frequency band is disclosed. The transmitter comprises a first power amplifier and a second power amplifier. The first power amplifier has a first input for a first signal at the first radio frequency band, a second input for a first control signal and a first output for an amplified first signal. The first output is connectable to the antenna. The second power amplifier has a third input for a second signal at the second radio frequency band, a fourth input for a second control signal and a second output for an amplified second signal. The second output is connectable to the antenna. The transmitter further comprises a single control module which receives a signal indicative of a current an active power amplifier draws. The control module uses this signal indicating the drawn current to generate a control signal to control the active power amplifier.

Abstract: A combining technique for coherently combining signals transmitted from a moving satellite that are received by separate antennas. The combining technique corrects for differential delays that are large enough to cause misalignments in the symbols of the communication signal as well as the phase of the signal. Further the combining technique tracks changes in the differential delay, keeping the phase and the symbols properly aligned for combining.

Abstract: A use prohibition system which can disable a cellular phone or any other device if it separates more than a predetermined distance from the user, and at the same time give a warning to the user. It includes an identification signal transmission unit and a use prohibition mode canceling unit attached or mounted to the cellphone. Each unit has a transmitter and a receiver. The receiver of the canceling unit receives an ID code signal from the transmission unit and produces, based on the ID signal received, a use prohibition canceling signal. The canceling unit returns a confirmation signal to the transmission unit. If the two units separate more than a predetermined distance from each other, the levels of the ID signal and the confirmation signal received by the respective units drop below a predetermined value. Thus, the canceling unit stops producing the canceling signal to disable the cellphone, while the transmission unit sounds an alarm.