Abstract: Method and system for localizing a mobile device in a vehicle is provided. The method may include: triggering an audio system mounted on a vehicle, which audio system includes a plurality of speakers, to play an acoustic signal; and calculating a position of a mobile device in the vehicle based on a recording of the audio system's playback of the acoustic signal, which is recorded by the mobile device, and position information of the plurality of speakers. Localization may be more accurate.

Abstract: Methods for broadcasting or receiving information through a channel which is dedicated for vehicular safety use are provided. And electronic devices are provided. One of the methods includes: an electronic device mounted on a vehicle obtaining lane information of the vehicle, where the lane information indicates on which lane the vehicle is travelling; and broadcasting the lane information of the vehicle through a channel which is dedicated for vehicular safety use. By employing the methods, electronic devices can broadcast their lane information, road information or layer information through a channel which is dedicated for vehicular safety use, which may meet requirements in some vehicular safety applications.

Abstract: Methods and systems for communicating a message through a communication network are provided. A method for transmitting a message through a communication network may include: partitioning the message into at least two parts; generating at least two bit sequences each of which carries a corresponding part of the message; modulating the at least two bit sequences to form a modulated signal frame which includes at least two modulated parts corresponding to the at least two bit sequences, respectively, where the at least two modulated parts of the modulated signal frame have different power levels; and transmitting the modulated signal frame through the communication network.

Abstract: A method and system for collaborative spectrum sensing in a cognitive radio network is provided. The method may include: receiving through a cognitive radio network a plurality of sensing results of availability of a channel, where the plurality of sensing results are generated by a corresponding number of vehicles within the cognitive radio network, respectively, where broadcasting of the plurality of sensing results is controlled based on positions of vehicles within the cognitive radio network; and determining whether the channel is available based on the plurality of sensing results. By using the method, the efficiency of collaborative spectrum sensing can be improved.

Abstract: Communication methods and devices are provided. A communication method includes: a first communication device detecting whether its communications is substantially affected; and if yes, sending a message to a second communication device, whose communication distance is shorter than that of the first communication device, to request the second communication device to decrease its effect on the communications of the first communication device. More reliable solutions for spectrum sharing may be obtained.

Abstract: A fine timing method is provided. The method comprises: calculating values of a first timing metric function based on cross-correlation between a received signal and M training sequences within a time period, to obtain a plurality of sets of X values spaced according to a certain pattern; calculating summations for the plurality of sets of X values, respectively; and determining the beginning of a data frame based on the calculated summations.

Abstract: A user equipment receives, from the base station apparatus, bit information. The bit information indicates first information indicating one or more antenna ports and second information indicating a number of layers for downlink data symbols.

Abstract: A method and a system for generating a plurality of ranging sound signals for positioning a mobile device are provided. The method includes: each of a plurality of ranging signal generating devices, which are connected to an audio signal cable and are located at different positions in an area, generating a ranging sound signal based on a synchronization signal transmitted on the audio signal cable, whereby location of the mobile device within the area can be obtained based on records of the ranging sound signals made by the mobile device. Accordingly, a plurality of speakers connected in series are able to be controlled to reproduce ranging sound signals for positioning a mobile device.

Abstract: A communication method and system in an Ad-Hoc network using a RR-ALOHA based protocol are provided. The method may include: receiving a data frame which includes N slots, where N is a positive integer greater than two, where a slot includes a payload and a frame information field, where a frame information field includes N sub-frame information fields which correspond to the N slots, respectively, where a sub-frame information field includes a source temporary identifier field for indicating which node occupies its corresponding slot; and if a source temporary identifier field contained in the received data frame equals to a first predetermined value representing the status of free, determining that a corresponding slot is free and can be reserved. By using the method of the disclosure, communication efficiency is improved.

Abstract: A lane detection method and a lane detection system mounted on a first vehicle are provided. The methods includes: calculating on which lane a first vehicle is located based on vehicle-to-vehicle data received by the first vehicle from at least one neighboring vehicle, where the neighboring vehicle means another vehicle located within a vehicle-to-vehicle communication range of the first vehicle. The system may include: a communication device for receiving vehicle-to-vehicle data from at least one neighboring vehicle, and a processing device for calculating on which lane the first vehicle is located based on the vehicle-to-vehicle data received by the communication device, where the neighboring vehicle means another vehicle located within a vehicle-to-vehicle communication range of the first vehicle. Lane detection may not rely on marks on roads which are inherently not clear or blur due to a bad weather.

Abstract: A system for reducing collisions in communications utilizing a media access control (MAC) data communication protocol and/or a time division multiple access-based (TDMA-based) data communication protocol, such as an Aloha protocol or an MS-Aloha protocol, that may include one or more electronic devices (such as electronic devices of a vehicular ad-hoc network (VANET)).

Abstract: A trajectory detection method and a trajectory detection system are provided. The method includes: receiving, on a first vehicle, from a second vehicle, dynamic data containing at least one dynamic feature of the second vehicle; detecting a relative position of the second vehicle with regard to the first vehicle using an object detection sensor mounted on the first vehicle; and generating a trajectory of the second vehicle based on the relative position and the dynamic data. Accuracy may be improved.

Abstract: Method for connecting a first electronic device to internet through another electronic device and first electronic devices are provided. The method includes: the first electronic device broadcasting an acoustic signal which carries configuration information for configuring access point, where the configuration information includes an access point identifier, where the configuration information can be extracted from the acoustic signal by another electronic device that receives the acoustic signal and can be used to configure the electronic device as an access point; when an access point having the identifier is detected by the first electronic device, sending to the access point a request for connecting to it to access internet service; and connecting to internet through the access point after a notice of permission is received from the access point.

Abstract: Wi-Fi based position information communicating methods, vehicle mounted communication devices, and pedestrian devices are provided. One of the methods includes: a communication device mounted on a first vehicle determining whether position information of a second vehicle, whose distance to the first vehicle is shorter than a first predetermined distance, is received within a first predefined time period; and if no, broadcasting position information of the first vehicle in a first 802.11 management frame. By employing the methods, pedestrian detection rate may be improved and wireless channel congestion may be mitigated.

Abstract: The present invention provides a universal control device for controlling sensors and controllers incorporated in a separate room. The universal control device includes a control logic analyzer adapted to receive a control logic, decompose the control logic into at least one condition and at least one instruction, and identify at least one sensor for the condition(s) and at least one controller for the instruction(s) correspondingly; a control center adapted to retrieve data from the at least one identified sensor, determine whether the at least one condition is met or not based on the retrieved data, and send the at least one instruction to the at least one identified controller for execution when the at least one condition is met; and a uniform interface adapted to couple the sensors and the controllers to the universal control device, and implement communications between the universal control device and the sensors, and the controllers.

Abstract: A user equipment generates information based on a plurality of values of joint coding of a Rank Index RI and a first Precoding Matrix Index W1 and transmits the information on a physical uplink control channel. The payload size of the information is 5 bits. The first Precoding Matrix Index W1 and a second Precoding Matrix Index W2 correspond to a precoding matrix and 16 values in the plurality of values correspond to the Rank Index RI of 1 or 2 where a part of values in the plurality of values except the 16 values in the plurality of values correspond to the Rank Index RI of more than 2.

Abstract: A fine timing method is provided. The method comprises: calculating values of a first timing metric function based on cross-correlation between a received signal and M training sequences within a time period, to obtain a plurality of sets of X values spaced according to a certain pattern; calculating summations for the plurality of sets of X values, respectively; and determining the beginning of a data frame based on the calculated summations.

Abstract: Method and system for localizing a mobile device in a vehicle is provided. The method may include: triggering an audio system mounted on a vehicle, which audio system includes a plurality of speakers, to play an acoustic signal; and calculating a position of a mobile device in the vehicle based on a recording of the audio system's playback of the acoustic signal, which is recorded by the mobile device, and position information of the plurality of speakers. Localization may be more accurate.

Abstract: Communication methods and devices are provided. A communication method includes: a first communication device detecting whether its communications is substantially affected; and if yes, sending a message to a second communication device, whose communication distance is shorter than that of the first communication device, to request the second communication device to decrease its effect on the communications of the first communication device. More reliable solutions for spectrum sharing may be obtained.

Abstract: A Channel State Information (CSI) feedback method and a User Equipment (UE) are provided for better support of Joint Transmission (JT) and Beamforming/Coordinated Scheduling (CB/CS). For JT, phase information for an adjacent Base Station (BS) is fed back. For CB/CS, enhanced CSI for an adjacent BS is fed back. The UE according to the present invention includes: a coordinated BS set determining unit configured for determining a set of coordinated BSs participating in multi-BS coordination, the set of coordinated BSs containing a serving BS and at least one non-serving BS; and a CSI feedback unit configured for feeding back CSI for JT or CB/CS for each non-serving BS in the set of coordinated BSs. The present invention has the advantages of simple implementation and low overhead and is applicable in LTE-A and 4G systems.