Abstract: A method is disclosed of transferring data to a first communications device having a first transceiver for communication at a first data rate over a long range, and a second transceiver for communication at a second, higher data rate over a short range. The method includes forming a co-ordinated short-range wireless network using the first communications device and at least one second communications device of a similar type. Communication is then initiated between the first communications device and said at least one second communications device to establish whether that second communications device has data required by the first communications device. The first communications device then communicates, upon the first communications device receiving confirmation that a second communications device has the required data, with a service provider using its first transceiver to request permission for the transfer of the required data from said communications device to the first communications device.

Abstract: Providing a wireless communication device that, even if clock stop of a radio frequency part is controlled by a baseband part operating on the same clock signal, can resume clock oscillation, and makes it easy to time the clock reactivation to other operations based on a shared clock. The wireless communication device comprises an RF part generating a first clock signal and a baseband part. The baseband part generates a second clock signal, controls the generation and stop of the first clock signal, uses the first clock signal to perform data processing and a clocking operation, and in a low power consumption state in which the first clock signal is stopped, uses the second clock signal to perform a timer operation and a clocking operation. The generation timing of the first clock signal can be generated by the timer operation using the second clock signal.

Abstract: A wireless audio transmission and reception system includes a pulse width amplifier, an up-converter, a transmitter, a receiver, a down-converter, an integrator, and a power amplifier to transfer an analog signal to a transducer such as a speaker. The pulse width amplifier receives an analog signal and modulates a pulse width of a timing signal with the analog signal. The pulse width of the timing signal is modulated such that the pulse width is proportional to the amplitude of the analog signal, and provides a pulse width modulated signal. The up-converter is in communication with the pulse width amplifier to receive the pulse width modulated signal and convert the pulse width modulated signal to a modulated carrier signal. The transmitter in communication with the up-converter to receive the modulated carrier signal and to transfer the modulated carrier signal wirelessly.

Abstract: Multiple power amplifiers in an RF front end are coupled to multiple antennas without diversity switching between the PAs and antennas. Diversity switches direct signals to broadcast by a selected antenna to a PA coupled to the selected antenna. Multiple LNAs are similarly coupled to the diverse antennas. Having one PA and LNA set for each antenna removes the need for diversity switching between the PA/LNAs and each antenna improving signal reception. In one embodiment, a single external PA performs broadcast functions and plural on-chip LNAs are used for reception. In another embodiment, phase shifters are coupled to each PA and LNA, which provide beam forming capability for broadcasts, and in phase signal combinations for received signals.

Abstract: The method and apparatus herein identifies tunable duplexer in a communication system. The tunable duplexer includes a tunable receiver filter, a tunable transmitter filter, a variable receiver phase shifter, and variable transmitter phase shifter. Each filter and phase shifter is optimized based on characteristics of impedance within the duplexer. The duplexer may be adjusted to changing environments or desired changes in the frequency of operation, reducing circuitry architecture and providing greater flexibility in communication function. The method commences by tuning tunable filters within the duplexer and then optimizing phase shifters within the duplexer for adjusting impedance matching with antenna and isolating the receiver from the transmitter during duplexing operations. Optimizations and calibration may be performed during manufacture, upon initialization of the system, or during operation of the communication device.

Abstract: The carrier detector 5 notifies the threshold value controller 6 of the received power value of a received signal and then controls various portions so as to defer transmission of the transmission signal when receiving a signal having a received power exceeding a threshold value Rth from the threshold value controller 6. The demodulator 3 notifies the threshold value controller 6 of a transmission source included in the received signal. The modulator 4 notifies the threshold value controller 6 of the destination of the transmission signal. The threshold value controller 6 outputs the received power value of a received signal from the destination, as a threshold value Rth, to the carrier detector 5.

Abstract: A transmitter and method to output a stable output signal having low distortion by adjusting a delay time of an amplitude signal path and a phase signal path. In an amplitude phase extracting part, amplitude data and phase data are extracted from a transmit data signal and outputted. The amplitude of the amplitude data is modulated in an amplitude modulating part and an amplitude modulating signal is outputted; the phase of the phase data is modulated and a phase modulating signal is outputted. In a non-linear amplifying part, the phase modulating signal is multiplied by the amplitude modulating signal to output an RF signal with a prescribed gain amplified. A delay part provided in a pre-stage of the amplitude modulating part and a delay part provided in a pre-stage of the phase modulating part, respectively, adjusts the delay time of an amplitude signal path and a phase signal path.

Abstract: A remote controller includes a plurality of keys, which are operated to transmit infrared signals different for each key. A receiving device executes different kinds of operations based on the kind of signal received from the remote controller. The receiving device can change the correspondence between the kind of signal received from the remote controller and the kind of operation to be executed.

Abstract: A radio reception apparatus is a radio reception apparatus for demodulating a multicarrier signal modulated according to multicarrier modulation. It includes a plurality of antenna sections, each for receiving a multicarrier signal, a plurality of carrier selection sections, each of the carrier selection sections selecting at least one subcarrier signal for each of the antenna sections out of the multicarrier signal received by each of the antenna sections, an antenna selection section for selecting a reception antenna section from among the antenna sections based on the signal strengths of the subcarrier signals selected by the carrier selection sections, and a demodulation section for demodulating the multicarrier signal received by the antenna section selected by the antenna selection section.

Abstract: A receiver in which the sneaking noise from a crystal oscillator is reduced. A high-frequency amplifier circuit 11, a mixing circuit 12, a local oscillator 13, intermediate-frequency filters 14 and 16, an intermediate-frequency amplifier circuit 15, a limit circuit 17, an FM detection circuit 18, and a stereo demodulation circuit 19, an oscillator 20, and a PLL circuit 21 all constituting an FM receiver are provided as a one-chip component 10. A crystal oscillator 31 as an external component is connected to the oscillator 20. The natural-oscillation frequency of the crystal oscillator 31 is so set that the fundamental component and its harmonics are out of the reception band.

Abstract: The invention provides an automatic gain control and antenna selection method used in a receiver of a radio communication system. The received signal power is estimated by digital signal processing after analog-to-digital conversion in the system, in order to adjust the gain of the front end analog signal until the magnitude of the analog signal is adjusted to an optimum range of the digital signal processing. In addition, the ADC is utilized to estimate the signal power as the basis of the antenna selection.

Abstract: An antenna unit includes an antenna, a high-frequency amplifier, an attenuator circuit, an output cable, and a voltage detector circuit. An operating voltage is supplied from a receiver to the high-frequency amplifier through the output cable. The operating voltage changes in accordance with an automatic gain control (AGC) voltage. The voltage detector circuit detects a change in the operating voltage. In response to the voltage detector circuit output, one of the high-frequency amplifier and the attenuator circuit is selectively connected to a signal line between the antenna and the output cable.

Abstract: A wireless communication device (WCD) performs DC removal on a received signal using a coarse DC removal unit that removes relatively large DC components and a fine DC removal loop that removes residual DC components. The coarse DC removal unit can be implemented in a receiver, and the flue DC removal loop can be implemented in a modem. In addition, a coarse DC estimation loop implemented on the modem may be coupled to the coarse DC removal unit to update DC offset values stored in the DC removal unit. By storing coarse DC offset values locally on the receiver, DC removal can be achieved very quickly.

Abstract: An apparatus, a carrier medium storing instructions to implement a method, and a method for controlling the gain of a radio receiver for receiving packets of information in a wireless network. The receiver is connected to an antenna subsystem and has receive signal path including a plurality of sections including a first section coupled to the antenna subsystem and a next section. Each section has an adjustable gain and is able to provide a measure of the signal strength at its output. The method includes waiting for a start of packet indication, providing a measure of the signal strength at the output of the first section and the next section, and adjusting the gains of the first and the next sections using the provided measured signal strengths. In one embodiment, the receive signal path includes a filter, the provided measure for the first section is before the filter, and the provided measure for the second section is after the filter.

Abstract: A method is provided for fast acquisition in a wireless network. This method involves receiving a first wireless signal at a receiving device, sent from a transmitting device; determining a first transmitting clock phase of the transmitting device by performing first acquisition and tracking processes on the first wireless signal; storing the first transmitting clock phase in the receiving device; receiving a second wireless signal at a receiving device, sent from the transmitting device after the first wireless signal; and determining a second transmitting clock phase of the transmitting device by performing a second acquisition process on the second wireless signal using the first transmitting clock phase as starting phase data. By using the stored first transmitting clock phase information as a starting point for acquisition, the receiving device can perform a second acquisition process that is much faster than a blind acquisition.

Abstract: A wireless communication apparatus is equipped with a plurality of antennas. A switch leads a received signal by way of an antenna selected according to an antenna switching signal to a demodulator unit. Software installed in a MAC unit generates a first switching signal. A diversity control unit generates a second switching signal by the built-in hardware circuit. The first switching signal is used as an antenna switching signal during a packet receiving ready period, while the second switching signal is used as an antenna switching signal during a period for receiving a packet.

Abstract: An electrostatic-discharge/impedance-matching circuit for use in radio frequency (RF) integrated circuits. The electrostatic-discharge/impedance-matching circuit includes at least one shunt circuit operable to shunt current related to an over-voltage condition and at least one series element operably coupled to the shunt element. The shunt element and series element in combination provide electrostatic discharge protection for the RF signal processing circuit elements on the integrated circuit and also provide a matched input impedance for an incoming RF signal. Various alternate embodiments of die electrostatic-discharge/impedance-matching circuit include first and second shunt elements and a series element operably connected in combination to provide optimal electrostatic discharge protection and impedance matching.

Abstract: A portable communication unit that operates based upon predetermined discrete blocks of airtime. The unit may be operated as a conventional portable communication unit when airtime is available, and operation of the unit for conventional communication is disabled when all the airtime has been used. By entering a specific code, which may be supplied by a dealer, the user may activate an additional block of airtime. Two classes of airtime may be provided; home time airtime which is used when the unit is within the area of a local or primary communication service provider, and roam time airtime which is used when the unit is outside of the area of a local or primary communication service provider. The unit may be programmed, preferably only by the dealer, with toll restrictor codes that limit the available range of numbers with which the unit may initiate a communication session.

Abstract: A communication control method for controlling data communication conducted between a portable information communication terminal and a data communication apparatus via a communication network including a radio communication network includes the steps of: determining whether data communication between a portable information communication terminal and a data communication apparatus has been interrupted by disconnection of a communication line; and in response to normal termination of data communication between a portable information communication terminal and a data communication apparatus, clearing accounting on data communication that was interrupted between said portable information communication terminal and a data communication apparatus by disconnection of a communication line within a predetermined time before the normal termination of the data communication.

Abstract: A method of operating a telecommunication system that enables operation of a mobile telephone at different user rates that are dependent on the instantaneous location, where a local fixed station at the user end transmits a first signal of limited range that is received by a mobile telephone that is associated with the fixed station, that is, provided that the mobile telephone is present within the range of the transmission signal, and the mobile telephone transmits, in response to the reception of the first signal, a second signal to a base station of the telecommunication system which switches over to a different user rate in response to the reception of the second signal.

Abstract: The details of an apparatus and method of handling simultaneous universal terrestrial radio access network radio resource control procedures which change the security configuration in a universal mobile telecommunications system user equipment are disclosed herein. According to one aspect of the present application, there is provided a user equipment apparatus having a message handler, a sequential processor, a command store, and a security configuration change detector, wherein said message handler is coupled to said command store, is coupled to said sequential processor, and is coupled to said security configuration change detector to save, process, and detect configuration changes in commands respectively, and to determine if there is an existing command at the user equipment, such that the user equipment appears to the UTRAN as though it were processing commands simultaneously.

Abstract: A wireless terminal implements location-based transaction authentication and includes a wireless interface, a user interface, a Global Positioning System (GPS) receiver, and a processing unit. The wireless terminal receives a transaction request from the user, accesses a servicing network via the wireless interface, sends a transaction initiation request to the servicing network, receives an authentication challenge from the servicing network, and determines its current location via access of the GPS receiver. The wireless terminal prepares and transmits an authentication response based upon the received location. When the authentication response is accepted by the servicing network, the processing unit is able to service the transaction between the user and the servicing network. When the authentication response is rejected the transaction is not serviced. Relative location information and further user authentication may also be used.

Abstract: A method for processing and/or evaluating MMS (Multimedia Messaging Service)-related messages (Multimedia Messages (MMs), parts of MMs, delivery reports, read-reply reports, MMS notifications, etc.), on a device or device ensemble adapted to participate in mobile telecommunication (Mobile Station (MS); User Equipment (UE); Mobile Equipment (ME); laptop, notebook, organizer, PC, etc., connected to a MS, UE, etc.), the device or device ensemble accommodating an MMS User Agent and accommodating or adapted to accommodate at least one SIM card (Subscriber Identity module) and/or one UICC (Universal Integrated Circuit Card) with a USIM (UMTS (Universal Mobile Telecommunication Service)-SIM), wherein the MMS-related messages are terminal originated or terminal terminated. The MMS-related messages are processed and/or evaluated by at least one SAT/USAT application (SIM Application Toolkit/USIM Application Toolkit) residing on the SIM card/UICC.

Abstract: A mobile communication device, such as a wireless mobile phone, is provided with a unified message function equipped to facilitate a user in interacting with communication messages of different message types supported by the mobile communication device via an unified message box.

Abstract: An initial channel access message such as a Random Access Channel (RACH) preamble is used to mean that not only that a channel access has been requested by a mobile station (500) but also that a particular type of service has been requested. By associating a type of service (e.g., Dispatch, web browsing, etc.) with the particular signature that is used to form the RACH preamble it speeds up the service negotiation process. Both the communication system (600) and the MS (500) know what service is associated with which signature, so as soon as a RACH preamble is received by the system, it can determine if it has the resources available to accommodate the request.

Abstract: Techniques for performing system selection based on a usage model that uses “access strings”, “profiles”, and “activation strings” are described. Access strings are defined for wireless data services and provide a highly intuitive user interface. Each access string is associated with one or more profiles. Each profile includes various parameters needed to establish a specific data call. Each profile is further associated with an activation string that contains connection information for the data call. System selection is performed in two parts. In the first part, a wireless user views access strings for available data services, selects the access string for the desired data service, and returns the selected access string. In the second part, the wireless device selects a profile for a system most suited to provide the desired data service, from among all profiles associated with the selected access string.

Abstract: A geographical web browser allows a user to navigate a network application such as the Word Wide Web by physically navigating in geographical coordinates and roaming through coverage areas of cellular base stations, wireless LANs, microcells, and other such broadcast domains. A mobile unit receives unsolicited push messages in a local hotspot area. A packet filter filters local hotspot push messages to see whether they coincide with the user's preferences. In some embodiments, the push message is used to notify the user that information is available for download, and in other embodiments the push message or pushed packet sequence provides the content directly to the user.

Abstract: Disclosed are a mobile communication terminal including two lamps and a method for providing GPS services using the terminal, so as to promote users' convenience while providing various kinds of services. The device and method aim to support increasingly-diversified services of mobile communication terminals and particularly to allow the two lamps to be applied in providing services such as a GPS service which need to provide information indicating two navigation directions. Two lamps for incoming call notification are mounted on the external of the terminal. Each of the lamps is composed of a light emitting element. A display controller is provided inside the terminal for controlling the two lamps.

Abstract: The present invention provides a telecommunication system that has a processing unit; a memory; and at least a software component implemented on a processing unit and using said memory. Each software component includes a set of attributes, each attribute being a pointer to a particular location of a memory in which configuration data are stored, the configuration data defining features of the software component, at least a run attribute defining a run-time process for processing the data in the software component; and a reconfigure method adapted to switch the linkage of an attribute from an initial location in said memory to a final location in said memory. Furthermore, the system is configured to trigger on request the reconfigure method for software component and activate the run-time process defined by the run attribute of the or each software component according to a predetermined schedule.

Abstract: Methods and apparatus for efficiently managing the storage of e-mail message information for a mobile station are described. In one illustrative example, a plurality of e-mail messages are received by the mobile station through a wireless network and stored in memory. If a size of the e-mail messages reaches a predetermined limit of the memory, e-mail message bodies of some of the e-mail messages (e.g. relatively “old” e-mails) are automatically deleted from the memory while e-mail message headers of the e-mail messages are retained. E-mail message headers of e-mail messages having deleted e-mail message bodies may still be visually displayed in a list at the mobile station. Subsequently, if a user selection of one of these e-mail messages in the list is identified, an e-mail message body of the e-mail message is requested by the mobile station and received from a server through the wireless network.

Abstract: The invention relates to a method for evaluating the quality of a signal transmission path (2) presenting non-linear distortions. According to said method a specified test signal is sent from a transmitter (1) to a receiver (3). First the level of the received signal is adjusted in the receiver (3) and then a global quality evaluation is carried out using a specified comparative method. To adjust the signal level a local quality evaluation (11) based on the specified comparative method is carried out in a specified number of different, predefined windows (V1, à, VN?1, VN). Thereafter at least one window with an adequate local transmission quality is determined. The ratio of signal level of the test signal to signal level of the received signal is calculated in at least one window and the level of the entire received signal is adjusted on the basis of this ratio. Preferably only windows containing, for example, at least 50% of the total signal energy are used for adjusting the level.

Abstract: Methods and apparatus are disclosed for establishing a fixed wireless telephone service. A fixed wireless device includes a wireless device for establishing wireless connections to a wireless communications network that interfaces with a public switched telephone network. The fixed wireless device includes a connection that provides telephone service for an ordinary POTS-based telephone, handset, computer, or other communication device. Various techniques are provided for monitoring during use and/or verifying prior to use whether the fixed wireless device remains in an intended fixed location.

Abstract: Systems, methods, and devices for a database are provided. One database embodiment includes a set of executable instructions operable on the database. One or more database partitions are provided, each having a defined key range. The set of executable instructions is operable to reverse octets in variable length keys. A last digit in an odd-length key value, plus a pad, is placed in a dedicated octet to partition the variable length keys in the one or more database partitions.

Abstract: It is disclosed a method of adjusting mobility management in a mobile communication network, said mobile communication network comprising a mobility control unit (4; 40; 320) adapted to track location of communication units (1; 10; 310) communicating in said mobile communication network and to control the mobility management for said communication units. Mobility information related to a communication unit is provided (S1) to said mobility control unit, which evaluates (S2) the degree of mobility of said communication unit from said mobility information related to said communication unit. On the basis of said evaluated degree of mobility, mobility management elements used for mobility management of said communication unit in said mobile communication network are correspondingly adjusted (S3). Furthermore, there are disclosed a corresponding mobility control unit, a corresponding communication unit as well as a corresponding mobility management adjustment system.

Abstract: An unlicensed wireless service is adapted to generate the interface protocols of a licensed wireless service to provide transparent transition of communication sessions between a licensed wireless service and an unlicensed wireless service. In one embodiment, a mobile station includes level 1, level 2, and level 3 protocols for licensed wireless service and an unlicensed wireless service. An indoor base station and indoor network controller provide protocol conversion for the unlicensed wireless service into a standard base station controller interface of the licensed wireless service.

Abstract: A method and system for facilitating handover in mobile radio communication systems are illustrated. The mobile unit assists in making handover decisions by monitoring the signal strength of control channels transmitted by base stations in neighboring cells. During the handover, the mobile station can receive the same information from and/or transmit the same information to a plurality of base stations to provide diversity combination and improve transmission quality.

Abstract: A mobile communications device initiates a handoff from its current base station (BS) sector network attachment point to a new BS sector. The mobile sends a handoff request over its current wireless link to the current BS sector, which forwards the request to the new BS sector, e.g., via a network link. The new BS sector processes the request assigning dedicated resources, e.g., an identifier and dedicated uplink segments. Information identifying the allocated resources is conveyed from the new BS sector via the current BS sector to the mobile. The mobile determines the time of the allocated dedicated segments based upon a received beacon signal from the new BS sector with known timing relationships to dedicated segments. The mobile breaks the original wireless link just prior to the time of the first assigned dedicated segment. The mobile communicates information on the assigned dedicated segments to perform registration operations, e.g.

Abstract: A cellular network configuration tool is described that performs frequency assignments for use in a cellular network. The channels are assigned in accordance with input configuration data such as a channel separation matrix, geographic data, and requested channel assignments for each sector included in the cellular network being configured. The configuration is performed in accordance with predetermined constraints and criteria and quality of service input. The tool uses frequency assignment techniques to perform the channel assignments in accordance with varying constraints and criteria. A penalty function is used to determine a figure of merit for a particular set of frequency assignments.

Abstract: In a synchronization scheme, for example for establishing a channel in a UMTS radio communication system, when a user device (or user equipment, UE) such as a mobile terminal is establishing a channel with a network, the user device transmits signals on the uplink DPCCH, and the power of these signals is ramped up from a calculated initial power level until the transmission is detected by the receiver, i.e. until the receiver has obtained synchronization to the uplink signal.

Abstract: The present invention includes a radio access network and a method for sending a multimedia broadcasts/multicast services (MBMS) using channel switching. The channel switching is between dedicated and shared/common channels. The invention also includes MBMS reception scheduling for use when a wireless transmit/receive device receives an MBMS service from multiple transmission sources. The sources transmitting the MBMS service data in differing orders. One embodiment uses in band segmentation information and another embodiment uses out of band synchronization information.

Abstract: A network communication system is provided for communication between network nodes, including individual nodes and a central control station node. In the network, signals are transmitted from the central control node to identify specific timeslots in which individual nodes may transmit a request signal to the central control node. When a first individual node has data to transmit, the first individual node transmits a request signal to the central control node in its identified timeslot, the request including randomly generated information for identification of the node. In response to the request signal, the central control node transmits a grant signal along with the randomly generated information back to the first node to allow the first node to identify the grant.

Abstract: A method of implementing a fast dynamic channel allocation escape procedure in a wireless communication system includes a pre-code allocation procedure, a signal-independent code allocation procedure, and a post-code allocation procedure. The pre-code allocation procedure receives and processes a measurement trigger signal, retrieves system measurements from a centralized database, and determines physical resources to be reassigned. The code allocation procedure checks the availability of a code set in the cell and generates timeslot sequences for the available timeslots. A code set is assigned to the available timeslots in a timeslot sequence, wherein a successful assignment is a solution. The interference signal code power (ISCP) is calculated for each solution and the solution having the lowest weighted ISCP is selected as an optimal solution. The post-code allocation procedure stores the reallocation information in the centralized database and creates a physical channel reconfiguration request message.

Abstract: A wireless PDA device with proximity detection includes a trigger for implementing a reminder alert to a user of a wireless PDA device based on the proximity of another wireless PDA device. The proximity detection may be accomplished by actual knowledge of proximity (e.g., using appropriate GPS detection and reporting to a centralized location), or more preferably inferred using the short range capability of wireless networks such as a piconet network by comparing the members of a current piconet network (presumed to be within the range of the relevant wireless PDA device). In a disclosed embodiment, an intelligent reminder table is implemented for use by an appropriate reminder application running on a wireless PDA device. The reminder table includes a proximity alert election on an entry-by-entry basis, and automatic reminder canceling based on proximity detection of another wireless PDA device relevant to the reminder.

Abstract: Security of wireless networks is improved by rejecting traffic from a wireless device located outside a defined spatial boundary. The device's spatial position with respect to the boundary is determined using directional antenna arrays on a plurality of measurement points, and calculating where the vectors intersect. Having thus determined a device's location, access to a wireless network can be denied if the device is outside a predetermined spatial boundary. Or, the device's location inside or outside of the spatial boundary can be used for monitoring a changeable location of one or more client devices in a wireless network, for example as a theft detection or theft deterrent mechanism.

Abstract: Improved approaches for monitoring status of articles being shipped are disclosed. The monitoring can produce notifications to interested parties. The notifications typically contain status information pertaining to the articles being shipped. Alternatively, interested parties can gain access to status information pertaining to the articles being shipped via a website. According to one embodiment, the status information includes at least position (location) information and shipping conditions information.

Abstract: A position detection method employed in a position detection system for detecting the position of a terminal of a radio communication system is provided which determines propagation times of a signal between the terminal and a plurality of access points located around the terminal by the principle of trilateration, thus permitting reduction in position detection time. The invention comprises means for determining a movement velocity of the terminal from a temporal history of positional information about the terminal obtained by position detection with the trilateration, means for grouping the terminals with low relative velocities based on the terminal movement velocities, a control database including the terminal position information, the terminal movement velocities, and the group information as components, and means for determining a detection cycle of the terminal of interest for position detection using the control database.

Abstract: A quick paging method for improving a standby time of a mobile terminal in a shadow area or a handoff region where the mobile terminal receives a pilot signal from a base station over a pilot channel and a quick paging signal from the base station over a quick paging channel, and measures strength of the pilot signal and strength of the quick paging signal. When the pilot signal strength does not exceed a predetermined threshold value, the mobile terminal determines that one or more paging indicator bits transmitted from the base station over the quick paging channel are erased, and informs the base station of the pilot signal strength and the quick paging signal strength. The base station receives the pilot signal strength and the quick paging signal strength from the mobile terminal.

Abstract: A W-LAN communication unit, a personal handyphone communication unit and an EV-DO communication unit include communication functions corresponding to their communication systems. A W-LAN quality measurement unit detects a value corresponding to RSSI, which is the reception power. An EV-DO quality measurement unit periodically obtains EV-DO quality values. A throughput measurement unit measures the throughput values for the individual communication systems. A condition setting unit designates a condition for the selection of the W-LAN communication unit, the personal handyphone communication unit or the EV-DO communication unit. A threshold value storage unit stores threshold values. A first determination unit compares the throughput values for the W-LAN and the RSSI with threshold values. A second determination unit compares the EV-DO quality values with threshold values. And a selector performs the switching of communication systems.

Abstract: A method of constructing a radio network that enables the user to select an arbitrary radio communication apparatus as a control station and the thus selected radio communication apparatus preferentially constructs the radio network, wherein the radio communication apparatus that is desired to be arranged as a control station is set up so that it has the function of preferentially becoming a control station in advance. In case several radio communication apparatuses are designated as control stations, any of the radio communication apparatuses is selected as a control station based on the number of radio communication apparatuses with which the designated radio communication apparatus can communicate.

Abstract: The present invention is a mobile device having an improved roller feel, comprising a hollow metal cylinder, a support and a plurality of terminals disposed firmly on the support. The hollow metal cylinder comprises a plurality of interference areas at an end of the hollow metal cylinder. The support comprises two braces. The terminals comprises a plurality of spring contacts, where the terminals are in contact with the inner surface of the hollow metal cylinder and at least one of the spring contacts stretches into the hollow metal cylinder in a depth not exceeding the scope of the interference areas. When rolling the hollow metal cylinder, the present invention makes the spring contacts create explicit and regular stress variations to produce a sense of feel. The interactions between the hollow metal cylinder and the spring contacts are enhanced and the sense of feel is more obvious; and the effect of durability is improved.