Abstract: A method for switching routing in a low-earth-orbit satellite network, being adapted to a user terminal (UT), includes the following. Routing information is generated by the UT. The routing information is installed into a first routing table of a first satellite. The routing information is installed into a second routing table of a second satellite by the UT. The routing information of the first routing table is updated to relay information by the UT. The relay information corresponds to the second satellite. Handover from the first satellite to the second satellite is performed by the UT.

Abstract: A satellite communication system and a method for managing radio resource of a non-terrestrial network are provided. The method includes: transmitting, by a first satellite, a first resource scheduling assignment when leaving a service area of the non-terrestrial network; receiving, by a second satellite, a second resource scheduling assignment corresponding to the first scheduling assignment when entering the service area; and accessing, by the second satellite, the radio resource according to the second resource scheduling assignment.

Abstract: A method for performing a sidelink transmission and a transmitting user equipment (UE) and a receiving UE using the same are provided. The method includes: detecting a resource pool for reserving a feedback resource, wherein the feedback resource is reserved according to a first occupied feedback resource and a second occupied feedback resource; transmitting a first signaling to the receiving UE; and receiving, from the receiving UE, a second signaling corresponding to the first signaling, wherein the second signaling is carried by the feedback resource.

Abstract: A V2X communication method includes: sending an assistance information from a V2X device to a user equipment (UE); performing first configuration on the UE; receiving a packet by the UE; performing upper layer mapping by the UE; sending a first traffic information from the UE to the V2X device; in response to a configuration request from the UE to the V2X device, performing second configuration on the UE by the V2X device; performing packet mapping by the UE; and performing layer processing by the UE.

Abstract: The disclosure is directed to a radio resource sensing and selecting method used by a mobile device for wireless communication and a mobile device using the same. In an exemplary embodiment, the disclosure is directed to a resource sensing and selecting method used by a UE newly entering a network and operating under NR V2X mode 2. The method includes not limited to: receiving aperiodic data traffic; obtaining resource usage information of a resource pool before a first short-term window; determining collided UEs from the resource usage information; determining whether the collided UEs have sufficient resource units; selecting no resource within the first short-term window when the collided UEs lack sufficient resource units and waiting for a second short-term window; and selecting, in a random manner, an idle resource unit from the resource pool at the first short-term window when the collided UEs have sufficient resources.

Abstract: The disclosure is directed to a method of configuring a resource pool for SL communication by a receiver UE, by a transmitter UE, by a base station, a user equipment using the same method, and a base station using the same method. In an aspect, the disclosure is directed to a method of configuring a resource pool for SL communication by a receiver UE. The method would include not limited to: receiving an activation grant to perform SL communication; determining to modify the resource pool by changing from the first resource to a second resource of the resource pool in response to detecting a triggering condition; transmitting a first modification signal to modify from first resource to the second resource; receiving a modification grant to modify from the first resource to the second resource; and receiving a deactivation grant to terminate the SL communication.

Abstract: The disclosure provides a method for allocating and requesting sidelink resources, a base station and a user device. The method for allocating sidelink resources includes: receiving a request signal from each user device through a first communication interface, wherein the first communication interface belongs to a first communication system; transmitting a grant signal to each user device in response to the request signal of each user device; receiving a resource sensing result of each user device, and accordingly estimating a specific resource sensing result associated with a specific resource pool; and transmitting the specific resource sensing result to a first user device through the first communication interface to allow the first user device to arrange or perform a sidelink transmission corresponding to a second communication system.

Abstract: Disclosed is a connection management method for mobile device group, where the mobile device group includes a mobile device configured as a leader and a number of mobile devices configured as followers. The connection management method includes: in response to a measurement control from a first base station, the leader acquires signal quality measurement reports of all the mobile devices in the mobile device group corresponding to the first base station and a second base station, and signal quality measurement reports of all the followers in the mobile device group corresponding to the leader; the first base station determines whether to perform a handover according to the signal quality measurement reports received from the leader; and when the first base station determines to perform the handover, the first base station determines to perform a joint handover procedure or a half handover procedure according to the signal quality measurement reports.

Abstract: 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.

Abstract: 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.

Abstract: A user equipment (UE) and its resource sensing and selection method adapted to a UE is provided. The resource sensing and selection method includes following steps. Channel statuses for all component carriers (CCs) are measured and obtained. Several candidate CCs are determined from all the CCs according to the measurement values of the channel statuses for all the CCs and a proximity-based service per-packet priority (PPPP) corresponding to the UE. At least one of the candidate CCs is selected as at least one selected usable CC, and a resource sensing and selection process is performed on the at least one selected usable CC.

Abstract: A method, a transmitting node and a receiving node for feedback control of sidelink communication are provided. In the method, the base station generates a target information for transmitting feedback information with respect to data transmissions between a transmitting node and a receiving node; and at least one of the transmitting node and the receiving node receives the target information transmitted by the base station, or receives, from another node, target information transmitted by the base station to the another node; and in response to the transmitting node transmitting the data to the receiving node, the receiving node transmits the feedback information according to the target information, and the transmitting node obtains the feedback information according to the target information.

Abstract: 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.

Abstract: 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.

Abstract: Disclosed is a connection management method for mobile device group, where the mobile device group includes a mobile device configured as a leader and a number of mobile devices configured as followers. The connection management method includes: in response to a measurement control from a first base station, the leader acquires signal quality measurement reports of all the mobile devices in the mobile device group corresponding to the first base station and a second base station, and signal quality measurement reports of all the followers in the mobile device group corresponding to the leader; the first base station determines whether to perform a handover according to the signal quality measurement reports received from the leader; and when the first base station determines to perform the handover, the first base station determines to perform a joint handover procedure or a half handover procedure according to the signal quality measurement reports.

Abstract: A method of performing a handover procedure for device-to-device (D2D) communications and a control node thereof are proposed. The method is applicable to a first control node serving a D2D communication between a first user equipment (UE) and a second UE. The method includes: determining that one of the first UE and the second UE needs to be handed over or both of the first UE and the second UE need to be handed over; transmitting a handover request to a second control node if the first control node determines that both of the first UE and the second UE need to be handed over to the second control node; receiving a handover request acknowledgement from the second control node; and transmitting a handover command to indicate the first UE and the second UE to detach from the first control node and synchronize to the second control node.

Abstract: Provided is a wireless communication method. Original packet data is generated based on transmission data. The original packet data is transmitted. A first cyclic shift operation is performed on the original packet data to generate a first shifted data. An EXOR logic operation is performed on the original packet data and the first shifted data to generate a first retransmission packet data. The first retransmission packet data is transmitted.

Abstract: 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.

Abstract: An internet of vehicles, a base station, and a dynamic resource managing method thereof are provided. The dynamic resource managing method includes the following steps: At least one base station receives a transmission request from at least one vehicle mounted device. The base station initially plans a resource configuration according to a location distribution of the vehicle mounted device. At least part of the resource configuration which is initially planned is transmitted to the vehicle mounted device from the base station. The base station updates the resource configuration. At least part of the resource configuration which is updated is transmitted o the vehicle mounted device from the base station.

Abstract: 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.