Industrial Technology Research Institute

National Taipei University

Chun-Yi Wei

Chorng-Ren Sheu

Hua-Lung Tsai

Yan-Xiu Zheng

A method and a user equipment for resource allocation of vehicle network are provided. The method includes: sensing available resource blocks (RBs) to generate a first resource indicator labeling location information of the available RBs; receiving second resource indicators from neighboring devices in which the second resource indicators label location information of the available RBs sensed by the neighboring devices; combining the first resource indicator and the second resource indicators into a cooperative resource indicator and sending the cooperative resource indicator to a base station providing a centralized network; and receiving location information of a dedicated RB assigned by the base station according to the cooperative resource indicator and sending messages via the dedicated RB.

Method and user equipment for resource allocation of vehicle network

A method for receiving and transmitting synchronization signal is provided. The method is applicable to a wireless communication device. The wireless communication device has a local timing. The method includes the following steps. Receive at least one synchronization signal. If a signal power of at least one of the at least one synchronization signal is greater than or equal to a signal power threshold, select one of the at least one synchronization signal as a reference synchronization signal according to a priority rule, and synchronize the local timing to the reference synchronization signal. If the signal power of each the synchronization signal is less than the signal power threshold, send a local synchronization signal according to the local timing. If the reference synchronization signal meets a forwarding criterion, forward the reference synchronization signal, wherein the forwarding criterion includes a power constraint and a hop count constraint.

Method for receiving and transmitting synchronization signal and wireless communication device

A synchronization source device includes a receiving circuit, a timing adjusting circuit and a transmitting circuit. The receiving circuit receives a first synchronization signal from an Evolved Node B (eNB). The timing adjusting circuit adjusts, according to a timing indicator, a timing of transmission of a second synchronization signal in response to the first synchronization signal, wherein a timing of the second synchronization signal is corresponding to a timing of the first synchronization signal. The transmitting circuit transmits the timing indicator as well as the second synchronization signal based on the adjusted timing of transmission.

Synchronization source device for synchronization coverage extension and method and system using the same

Embodiments of a communication system, a base station (BS), a user equipment (UE), and a discovery method for device-to-device (D2D) communication are provided. The communication system includes a base station and multiple UEs. Each of the UEs uses one of multiple carrier frequency bands for communication. The BS obtains D2D communication requests of the UEs by the carrier frequency bands, and groups the UEs into multiple groups according to locations of the UEs. The BS allocates a discovery resource pool of a predefined carrier frequency band to the UEs in the same group and enables each of the UEs to transmit a discovery message corresponding to each of the UEs' own in the discovery resource pool.

Communication system, base station, user equipment, and discovery method for device-to-device communication

The present disclosure provides a device to device (D2D) synchronization method that is applicable to a user equipment and a user equipment (UE) using the same method. In one of the exemplary embodiments, the D2D synchronization method includes receiving detected signals from a receiver, obtaining from the detected signals a first signal having a first timing information and a second signal having a second timing information, determining whether to forward the first timing information or the second timing information based on an upper bound power restriction of the first signal and the second signal and a power difference between the first signal and the second signal, and determining whether to transmit a third timing information that is inherent of the UE based on whether the first signal and the second signal are below power thresholds.

Growing community of inventors

Taipei, Taiwan

Chun-Yi Wei