87results about How to "Reduce battery power consumption" patented technology

Provided are a sync channel of a forward link, a common pilot channel structure, and an initial cell search method and an adjacent cell search method for handover in a cellular system using orthogonal frequency division multiplexing (OFDM). A cell search method in an OFDM cellular system in which a primary sync channel and a secondary sync channel are configured based on time division multiplexing (TDM) includes acquiring sync block synchronization and a primary sync channel sequence number using a primary sync channel symbol included in a frame received by a terminal, detecting a boundary of the frame and a scrambling code group using the sync block and a secondary sync channel symbol included in the frame received by the terminal, and acquiring a scrambling code using the primary sync channel sequence number and the scrambling code group, thereby reducing cell search time with low complexity.

A battery-backed write-caching mass storage controller is disclosed. The controller includes a plurality of volatile memory banks for caching write data prior to being written to disk drives. Critical data is stored into a first subset of the memory banks, leaving a second subset of memory banks storing only non-critical data. Critical data is data that must be retained during a main power loss to avoid loss of write-cached user data. Critical data includes the write-cached user data itself, as well as metadata describing the write-cached user data. When the controller detects a loss of main power, the controller causes the critical memory banks to receive battery power, but disables battery power to the non-critical memory banks in order to extend the length of time the critical memory banks can continue to receive battery power to reduce the likelihood of user data loss.

A method and apparatus for transferring data between a handheld device and a network over a wireless communications link. A datapool manager breaks files into virtual blocks and adds the virtual blocks to a datapool. A communications manager converts the virtual blocks into transportation packets and controls the transfer of the transportation packets between the handheld device and the network. After a transportation packet is transferred, an acknowledgment is returned indicating that the transfer was successful. If the transfer of a file is interrupted, then, upon reestablishing the wireless link, only those transportation packets for which an acknowledgment has not been returned are transferred. To properly reconstruct the file, a pointer indicates the location of each transportation packet in the file. Furthermore, to enable the use of a partially transferred file, a table of information is maintained indicating the validity of the partially transferred file. Transportation packets are identified as instruction packets or data packets. When determining the order of transfer, priority is placed on the transfer of instruction packets.

A system and method of selecting air intake between 100% fresh air mode and 100% recirculated air mode for optimum heating/cooling performance, fuel economy and/or high voltage (HV) battery power consumption is disclosed. The system and method includes a partial recirculation control strategy in which the air inlet door is moved progressively to any position by taking into account cooling/heating loads and cabin fogging probability. As cooling/heating loads increase the air inlet door moves toward 100% recirculation mode. As fogging probability increases the air inlet door moves toward 100% fresh air mode. By selectively choosing a position between 100% recirculation and 100% fresh air, fuel economy and/or HV battery power consumption is optimized without compromising passenger comfort or causing fogging on interior glass surfaces. In cooling applications the compressor load is minimized and air conditioning performance is improved due to the reduced evaporator cooling load. The direct result of this improvement is increased fuel economy in the case of the internal combustion vehicle, reduced engine on time in the case of the hybrid electric vehicle (due to reduced HV battery power consumption), and reduced HV battery power consumption in the case of the hybrid electric vehicle (HEV) and the electric vehicle (EV). In heating applications, as the heating load is reduced the fuel economy of the internal combustion (IC) engine will be improved, the engine on time is reduced in the case of the HEV, and HV battery power consumption is reduced in the case of the EV.

An information distributor comprises a processor, a network receiver connected to the processor, a transceiver system connected to the processor, and a memory connected to the processor. The memory includes network receiver communication stacks configured to direct the network receiver to wirelessly receive information from a system communication network and transceiver protocol stacks configured to direct the transceiver system to wirelessly transmit the information on demand to a portable computing device located within transmission range of the transceiver system. The transceiver protocol stacks include a first module configured to direct the transceiver system to generate a beacon, a second module configured to direct the transceiver system to detect an acknowledgement signal generated, in response to the beacon, by the portable computing device, and a third module configured to direct the transceiver system to generate, in response to the acknowledgement signal, a broadcast incorporating the information.

Disclosed are a method and an apparatus for selecting a domain for a voice call in a mobile communication network. A terminal, which uses VoLTE, receives, from a network, identification information indicating whether IMS Voice over PS (IMS VoPS) is supported, determines whether the network supports IMS VoPS and determines a domain (PS or CS) to which a voice service will be provided through the network according to the determination result.

A signal repeater, a system utilizing one or more signal repeaters, and a method fordetecting a transient disturbance in the surface charge on drill pipe, which system, apparatus and method are collectively used to transfer data from deep-well and high-conductivity formation subterranean environments to a point nearer to the surface. The signal repeater comprises a housing that is securably mountable to the interior of a pipe-string disposed in a wellbore, which repeater receives and stores electrical signals for resending at an appropriate time.

The invention relates to a control method of a vehicle battery cooling system. The battery cooling system includes a battery cooler, a cooling liquid pump, a first expansion valve and an electric compressor shared with an air conditioning system for cabin refrigeration. The method comprises the following steps: when battery temperature is greater than a first temperature threshold, the first cooling mode is adopted, wherein the first cooling mode includes starting of the cooling liquid pump to cool the battery through the cooling liquid at the current temperature; and when the battery is in the first cooling mode and the battery temperature is greater than a second temperature threshold, a second cooling mode is further adopted, wherein the second cooling mode includes the implementation of a first process of the electric compressor to provide a refrigerant for the battery cooler, in order to reduce the temperature of the cooling liquid, and the second temperature threshold is determined according to whether the battery is in a charging state.

An unconnected power save method reduces the battery consumption of a wireless station in a wireless local area network (WLAN). A wireless station enters a sleep mode between scans for a prospective access point. The sleep duration time is determined using the current position of the station relative to the WLAN network topology.

A vehicle remote control system in which a plurality of users carry respective electronic keys that are assigned respective ID codes, for communicating with a vehicle-mounted control apparatus that periodically transmits a calling code followed by the ID codes in succession, in which an electronic key that is within communication range responds to its specific ID code by transmitting response data to the vehicle-mounted apparatus for thereby initiating a control operation, and in which when an electronic key responds, the corresponding ID code is made the first in the sequence of ID codes when the calling code and ID codes are next transmitted.

A battery pack that determines battery temperature via a protection circuit which detects electrical resistance change in a temperature sensor thermally joined with the rechargeable batteries. The protection circuit is provided with a timing circuit that sets timing for battery temperature detection, or it is provided with a current detection section that detects current flowing in the batteries and detects battery temperature when battery current is greater than a set current. A protection circuit, provided with a timing circuit, measures battery temperature with a fixed period. A protection circuit with a current detection section, detects battery temperature when battery current is larger than the set current.

Aspects of the invention can provide a data transfer control device that can switchover VBUS feed voltage. The transfer controller can send a switchover request packet to switch over a VBUS feed voltage to a plug B coupling side (device B side). When the transfer controller receives a switchover consent packet, it can instruct a feed switch circuit to switch over from normal voltage feed to low voltage feed. Then, monitor of the VBUS normal voltage level can be stopped and monitor of the VBUS low voltage level is started. The transfer controller receives the switchover request packet to switch over the VBUS feed voltage from the plug A coupling side (device A side). If it agrees to the switchover, it can send the switchover consent packet. And then, the monitor of the VBUS normal voltage level can be stopped and the monitor of the VBUS low voltage level is started. The switchover request packet and the switchover consent packet can be sent by a control transfer.

A system for supervising a battery mounted on a vehicle, the system includes a first part that detects a person in a vehicle in a stopped state, and a second part that executes a power saving control for reducing power of a battery on the vehicle consumed in electrical units mounted on the vehicle when the first part detects no person in the vehicle.

Methods and apparatus are provided for selecting a serving cell in a communication network for reducing power consumption in a UE, is provided. Network topology information is determined by obtaining cell rank information for the UE, extracting a mobility state of the UE, and applying a double moving average principle to the cell rank information of the UE. The network topology information is employed to determine a change in network topology. Radio Frequency (RF) scans are optimized based on the network topology.

Disclosed are an apparatus and a method of controlling diversity reception for a mobile communication terminal combined with a satellite digital multimedia broadcasting (DMB) receiver, which may control operations of an antenna and a tuner of the satellite DMB receiver using position information obtained by global positioning system (GPS). There is provided an apparatus for controlling diversity reception for a mobile communication terminal combined with a satellite DMB receiver comprising: a GPS antenna for receiving information on position of the mobile communication terminal using GPS; and a main control unit for performing general controls for the apparatus, checking position of the mobile communication terminal by using the position information received through the GPS antenna, and controlling on/off of the tuner unit according to position of the mobile communication terminal to receive DMB signals only through a set of antenna and RF tuner that can best receive the DMB signals.

A method, a system, and portable terminal display electric field information. The method includes collecting a sensor signal including location information and direction information of a portable terminal, transmitting the collected sensor signal to an information providing server, and receiving and outputting electric field information indicating an electric field intensity between the portable terminal and at least one base station located within a predetermined range of a direction in which the portable terminal is arranged among the at least one base station arranged around the portable terminal based on the sensor signal by the portable terminal.

An IP telephone system according to the present invention includes a plurality of communication devices T1, T2 allowed to mutually communicate through a network (IP network); a server for executing a connection starting process of communication between the communication devices, as well as for controlling communication data transmitted and received between the server and the communication devices during the communication between the communication devices; and a data transmission and reception controller for mutually switching, upon input of a predetermined command, a communication mode between a standard communication mode and a power-saving communication mode in a condition that communication connection is established between the communication devices upon execution of the connection starting process. The sound data is transmitted and received between the communication devices and the server in the standard communication mode. Transmission and reception between the communication devices and the server is stopped with respect to the sound data below a predetermined level while being continued with respect to the sound data beyond the predetermined level received in the power saving communication mode.

A method for protecting a security module includes the steps of monitoring proper insertion of the module on a device motherboard with first, second and third function units, erasing sensitive data due to an improper use or a replacement of the module with the second function unit, inhibiting the functionality of the module with the third function unit during a replacement of the security module, re-initializing the previously erased, sensitive data following proper use or replacement of the security module, and re-commissioning by enabling the function units of the security module. An arrangement implementation of the method has an unplugged status detection unit that has a circuit for resettable self-holding of a status indicator, the self-holding being triggered when the voltage level on a test voltage line deviates from a predetermined potential. A processor connected to the other function units and is programmed to identify and modify the status of the security module.

Apparatus, and an associated method, having a packet zone list timer embodied at a mobile node operable in a packet radio communication system. The packet zone list timer provides hysteresis to reduce the possibility of a ping-pong effect when a mobile node is operated at, or crosses, a packet zone boundary. A timer value used by the packet zone timer is selected at the mobile node without the need for network-generated commands to notify the mobile node of the timer value. Comparisons are made at the mobile node, and determinations are made at the mobile node as to whether registration of the mobile node is required.

The embodiment of the invention relates to the technical field of electronic smoking sets, in particular to a method and device for controlling the heating temperature of an electronic smoking set andthe electronic smoking set. The method comprises the steps of: when the electronic smoking set enters a heat preservation stage, judging whether a smoking action exists in the electronic smoking set;if the suction action exists, controlling the heating temperature of a heating element for reaching a first target temperature; and if the smoking action does not exist, controlling the heating temperature of the heating element for reaching a second target temperature, wherein the second target temperature is smaller than the first target temperature. In the way, when a user smokes, the heatingelement is controlled for quickly heating up and keeping constant to a first target temperature to bake a smoke cartridge for the user to smoke, when the user does not smoke, the heating element is controlled for cooling and is kept constant to a second target temperature lower than a baking temperature, the smoke cartridge is not baked, the utilization rate of the smoke cartridge can be increased, the battery energy consumption can be reduced, and the temperature of an electronic smoking set shell can be reduced.

When a mobile phone is out of an area covered by a communication currently in use, the fact is noticed to a user and, simultaneously therewith, a message urging the user to select another communication system is displayed. During a period in which this display is performed, it becomes possible to switch the communication system through a simple procedure.