Abstract: A vehicular remote control system has a mobile unit, a vehicle unit for establishing bidirectional wireless communication with the mobile unit, wherein the vehicle unit is able to transmit a wireless signal to the mobile unit through transmission antennas provided at a plurality of positions of a vehicle, and operational intention detector, provided at the plurality of positions of the vehicle corresponding to the transmission antennas, for detecting operational intention of a user approaching the positions. When a user's operational intention is detected, a predetermined request signal is transmitted from the vehicle unit to the mobile unit through a first transmission antenna, and the vehicle unit transmits an interrupt signal for preventing reception of the request signal, through a second transmission antenna.

Abstract: A method of conserving power in a mobile device during a cell updating procedure in a wireless communication system. The mobile device uses a first timer and a second timer to monitor its internal operations. If only one timer is running, a running timer is assigned to be the first timer. If both timers have no associated RABs, the first timer is started.

Abstract: When a remaining battery power amount of a child appliance is lowered, a battery recharging operation of the child appliance is not quickly carried out, lowering of the remaining battery power amount of the child appliance is displayed on a mother appliance which is owned by a mother. When there is a risk that the remaining battery power amount of the child appliance is lowered and thus operations of the child appliance will be brought into a malfunction condition, a content of a special instruction is stored into a non-volatile memory employed in the child appliance. Otherwise, while the content of the special instruction has been stored in a management server, an operation may be carried out in response to the instructed response after the remaining battery power amount has been recovered to a sufficiently high battery power amount.

Abstract: A portable wireless apparatus with transmission capability. An inner common antenna, including a metal frame embedded in an LCD and an inverse F-type antenna device, is provided, such that performance of the electromagnetic wave is increased to a maximum and resonance characteristics or mechanism of the antenna device is reduced, and the common antenna is adequately provided and embedded in the portable wireless apparatus.

Abstract: An access point in a wireless network may receive packets over a wired network. The access point may be provided with instructions from the host to determine when to awaken the host from a reduced power consumption state in response to the receipt of a packet. Thus, the access point can enforce wake packet filtering rules while the host is maintained in a reduced power consumption state. This may reduce the power consumption of the host by avoiding the unnecessary awakening of the host every time a packet of little importance arrives over the network.

Abstract: Methods and apparatus for expeditiously releasing network resources for a mobile station based on low battery and lost signal conditions are disclosed. The wireless network (104) receives a power down warning message from the mobile station (102) indicative of a low battery condition. The wireless network (104) then identifies whether a lost signal condition exists with the mobile station (102). In response to receiving the power down warning message and subsequently identifying the lost signal condition, the wireless network (104) causes network resources for the mobile station to be released. The wireless network (104) infers that the mobile station (102) has powered down due to low battery without enough time to send a power down registration to the wireless network (104).

Abstract: A method and system for optimizing energy consumption during data file read/write operations in a battery powered disk-based memory system is provided.

Abstract: A digital receiver unit (28) having a backup energy source (214) for use in a vehicle (250) that operates on a primary energy source (216) includes a receiver (203) powered by the primary energy source when the vehicle is operating, a switching mechanism (210 and 212) for switching the receiver between the primary energy source and the backup energy source and a controller (210) coupled to the receiver for controlling the switching mechanism. The receiver receives data during a scheduled predetermined time and the backup energy source powers the receiver during the scheduled predetermined time if the vehicle is not operating.

Abstract: Methods and apparatus implementing spatial processing in a remote unit. In general, in one aspect, a remote unit in accordance with the invention includes a plurality of antennas and a spatial processing unit coupled to the plurality of antennas.

Abstract: A method of transferring data signals between a primary station (10) and secondary stations (SL1 to SL5) of a master/slave radio network, comprises the primary station assigning the secondary stations to a plurality of categories (Z1, Z2). The primary station transmits beacon signals containing indications of those categories of the plurality for which it has data to be transferred. A secondary station operating in accordance with a wakeup sequence receives the beacon signals and determines if there is an indication of its category in a received beacon signal. If so, it transmits a request including an indication of its identity. The primary station checks to see if it has a data packet for the identified secondary station and, if it has, it transmits the data packet and, if not, it transmits a negative acknowledgement. Those secondary stations not participating in the exchange of messages can revert to a sleep mode thereby saving power.

Abstract: A method and system of periodically measuring the signal strength fluctuations in a wireless connection between a portable computer system and a wireless network. The portable computer system has a main processor and a DSP (digital signal processor). The DSP receives instructions from the main processor for controlling the periodic measuring, and subsequent thereto is placed in low power mode. The main processor is placed into a low power mode after sending the instructions. The DSP periodically awakens to measure the signal strength fluctuations while the main processor remains in a low power mode. When the signal strength fluctuation is unacceptable, this triggers the DSP to awaken the main processor. When the signal strength fluctuation is acceptable, the DSP returns to a low power state until the next periodic measuring.

Abstract: A control device 11 for use with another device (such as a movable barrier operator 12) has multiple memory interfaces 26 and 27 to permit the contents of one memory to be copied to another memory to thereby create an effective clone of the first memory. This copied memory is easily removable from the control device 11 and thereafter stored separately as a back-up memory or used as the main memory in another control device 11. This effectively avoids a need for more tedious registration of authorized remote control transmitters in systems where the control device 11 interfaces with a movable barrier operator 12. In one embodiment, blocking information as corresponds to any of the otherwise registered transmitters can also be copied to the new memory when effecting this process.

Abstract: A signalling system includes a plurality of active transponders (10), an interrogation station (12) and a source (14) of switching signals. Each of the transponders has a microcontroller (20), a radio transceiver (34) for responding to radio interrogation signals from the interrogation station, the radio transceiver being coupled to the controller by way of switching means (36) which switches the transceiver on or off whilst leaving the microcontroller active, and a passive receiver (38) for receiving switching signals from the source of switching signals which signals are used by the microcontroller for switching-on or -off the transceiver. Transducers (26, 28, 30) may be coupled to the microcontroller for monitoring environmental features, such as ambient temperature and humidity, and data relating to the features is stored in a RAM (32) in readiness to be relayed to storage means (56) in the interrogation station (12) as and when required.

Abstract: A building monitoring system is disclosed that includes a bi-directional radio link between a master and a number of remote units, wherein the master unit schedules the transmission times of the remote units to avoid collisions.

Abstract: An object of the present invention is to prevent from concentrating communication on one terminal, thereby avoiding an increase in power consumption and thereby prolonging the network configuration time when forming a network by a plurality of devices. A wireless communication device Pa established as a master receives battery information including battery remaining amount, communication possible time, a possibility of becoming a master, from wireless communication devices Pb, Pc, Pd established as slaves within a wireless network, and decides a candidate terminal for the next master based on the battery information. A master/slave switching instruction is issued to a candidate terminal for the next master from the wireless communication device Pa, under a master/slave switching condition, when the battery remaining amount of the master becomes the established value or less, and the like.

Abstract: An “identical beacons” field (401) is inserted near the beginning of a transmitted beacon (403) that contains either an integer equal to the number of consecutive identical beacons sent (i.e., identical to the one presently being transmitted) or a repetition bit indicating whether or not the beacon contains changed information when compared to a prior-sent beacon. After sleeping awhile, a node (302-304) wakes up, receives a first portion of the beacon containing the identical beacons field, and analyzes the identical beacons field. Based on the analysis, the node makes a decision on whether to remain “awake” for reception of the remaining beacon or to return to sleep.

Abstract: A system and method are disclosed by which a base transceiver station (BTS) may be uniquely identified. When attempting to determine the location of a mobile unit using signal from multiple BTSs, it is critical that the BTSs be uniquely identified and their position accurately determined. In many cases, the signals received from the BTSs provide limited identification information and cannot be used to uniquely to identify the BTS from which a signal has been received. The present invention uses available information to generate a candidate list and to determine therefrom the most likely candidates for the Measurement BTSs. Based on this information, the system analyzes cell coverage overlap and relative phase delay to determine the likelihood of a candidate BTS being the actual BTS from which a signal is received. As candidate BTSs are uniquely identified, it is possible to use this additional identification information in an iterative process to further identify additional candidate BTSs.

Abstract: In a radio communication terminal, a microprocessor determines a mode selected by user manipulation of a key input portion. The microprocessor turns on a backlight of a display with the backlight in accordance with the determined mode, controls the time period of a bright display mode, and turns the backlight off after the lapse of the period to switch the bright display mode to a dark display mode. The ON time period in the bright display mode is set longer in another mode than in a normal mode. The backlight ON time is optimally controlled in correspondence with a mode selected by the user, thereby improving the operability and prolonging the service life of the battery.

Abstract: A wireless receiver 300 and corresponding method to detect a message identifier or preamble that has been generated and provided by a transmitter 200 uses FFTs to estimate frequency and time offset. The wireless receiver 300 scans, asynchronously and sequentially during a wakeup time, a plurality of predetermined frequencies for the message identifier or specialized preamble. A plurality of received sample sequences are collected, one received sample sequence collected at each of the plurality of predetermined frequencies. A correlation between data corresponding to the preamble and data corresponding to a received sample sequence is compared to a threshold value to determine when the preamble has been detected. The wireless receiver 300 is wakened from a low power mode when the preamble is detected.

Abstract: A computer system includes an identification device and a host. The identification device includes a first wireless module for receiving a radio identification signal and then emitting a radio user signal with an identification code. The host includes a processing module for controlling operation of the host, a second wireless module for emitting the radio identified signal and receiving the user signal, a power supply for supplying power to the processing module while receiving a power control signal, and a control module electrically connected to the power supply. Before the power supply supplies power to the processing module, the control module checks whether the identification code within the user signal matches a predetermined identification code as the second wireless module receives the user signal. If the identification code within the user signal matches the predetermined identification code, the control module can transmit the power control signal to the power supply.

Abstract: The invention encompasses a method for identification of a mobile station which is assigned to a base station. The base station has a first low-power mode in which the base station transmits on a clock cycle. The mobile station receives on the same clock cycle and carries out an initial check to determine whether a base station signal is being received. The mobile station has a second high-power mode in which the mobile station lengthens the time period of reception to synchronize with the clock cycle and interchange identification data with the base station. The invention also encompasses a circuit arrangement in particular for carrying out the method.

Abstract: There is provided a mobile telephone including (a) an antenna receiving radio signals, (b) a display screen, (c) a voltage source, (d) a memory storing telephone numbers therein, (e) an interface through which an operator can set a low-voltage mode in which the mobile telephone is allowed to receive a call associated with predetermined telephone numbers, even if a voltage supplied by the voltage source is equal to or lower than a predetermined threshold voltage, and (f) a controller detecting a telephone number out of a radio signal received through the antenna, comparing the thus detected telephone number to the telephone numbers stored in the memory, and determining whether a call associated with the detected telephone number is to be received, when the mobile telephone is set in the low-voltage mode. The provided mobile telephone makes it possible to receive a call in a predetermined telephone number, even if a voltage supplied from a voltage source is lower than a predetermined threshold voltage.

Abstract: The system transmits data between terminals of a wireless network. In the system, a base station/central controller (“BS/CC”) controls transmission of data from a transmitting terminal to plural receiving terminals, where the data is ordered in slots of a control data frame (“CDF”), and where each slot is reserved for a data transmission between the transmitting terminal and a specific receiving terminal. Specifically, the BS/CC divides the plural receiving terminals into a set of power-saving terminals and a set of non-power-saving terminals, and then reserves a set of slots in the CDF for data transmission between the transmitting terminal and the power-saving terminals, and another set of slots in the CDF for data transmission between the transmitting terminal and the non-power-saving terminals.

Abstract: A GPS receiver communicates with a management center through a portable telephone terminal. The management center is connected to a telephone unit and a facsimile unit in a house through a telephone line. When the user presses a predetermined button with the telephone unit, a request for location information of the receiver is transmitted to the management center. The management center transmits the location information request as a DTMF signal to the receiver. The receiver measures the location thereof. The measured result and time information of a navigation message thereof are transmitted as a DTMF signal. When the management center determines that the message is old corresponding to the time information, the management center compensates the measured result. The management center transmits the location information to the telephone unit. The management center transmits image data with map information to the facsimile unit.