Abstract:
This application provides a method for repeatedly transmitting data and a device. The method includes: separately sending, by a terminal device, one piece of data in a PDCP entity to N logical channels, where a direct link transmission manner is used on at least one of the N logical channels, and N is a positive integer greater than or equal to 2; obtaining, by the terminal device, a resource; and sending, by the terminal device, the data on the N logical channels by using the obtained resource.
Abstract:
An assistance data transmission method, a device, and a system are provided. The method includes: obtaining, by a network device, assistance data from a positioning data center; and sending the assistance data to a terminal device in a broadcast manner, where the assistance data is data used by the terminal device to perform positioning. The assistance data is broadcast to the terminal device in the broadcast manner.
Abstract:
A device-to-device (D2D) transmission distance obtaining method and a device, related to the field of communications technologies and applied to wireless communications, where the method includes obtaining, by a first device, transmit power information, where the transmit power information indicates a transmit power used by the first device for sending data to a second device, and sending, by the first device, the transmit power information to the second device such that the second device obtains a distance between the second device and the first device, where the distance between the second device and the first device is obtained according to the transmit power and receive power used by the second device for sending the data. Hence, a more accurate D2D distance can be obtained.
Abstract:
A vehicle-to-entity (V2X) communication method, device, and system, the method including obtaining, by a terminal, a correspondence between a priority of a pedestrian-to-entity (P2X) service data packet and a V2X communication parameter value range, where the V2X communication parameter comprises at least one of a modulation and coding scheme (MCS), a quantity of transmissions, a transmit power, or a quantity of occupied resource blocks (RBs), determining, by the terminal, according to the priority of the P2X service data packet and the correspondence, a V2X communication parameter value range corresponding to the priority of the P2X service data packet, selecting, by the terminal, a V2X communication parameter value from the determined V2X communication parameter value range, and transmitting, by the terminal, the P2X service data packet on a radio resource according to the selected V2X communication parameter value.
Abstract:
A method and an apparatus for transmission mode conversion are disclosed. The method includes: detecting, by a terminal, whether a first transmission mode for sending data can be used; using, by the terminal, a second transmission mode to send the data when detecting that the first transmission mode cannot be used; stopping, by the terminal, using of the second transmission mode to send the data, and using the first transmission mode to send the data, when detecting that the first transmission mode can be used while the terminal is using the second transmission mode to send the data. By adopting the present disclosure, conversion between different transmission modes can be achieved, thereby avoiding a situation of communications interruption when a current transmission mode cannot be used, and the method is practical.
Abstract:
Embodiments of the present disclosure provide a monitoring report generation method where the method includes: receiving a monitoring parameter broadcast by a base station; monitoring energy of each discovery resource in a resource pool within a discovery time domain; determining a busy resource and an idle resource; and generating a monitoring report when a proportion of the busy resource or the idle resource in a predetermined quantity of consecutive discovery time domains meets a reporting condition corresponding to the busy resource or the idle resource, and sending the monitoring report to the base station. This resolves a problem in the related technology that: because D2D user equipment cannot accurately obtain a quantity of resource collision times in a cell, the base station cannot accurately learn a resource status in the cell, and it is ensured that the base station can accurately learn the resource status in the cell.
Abstract:
Embodiments of the present disclosure provide a data sending method, user equipment, and a network device. The method includes: receiving, by a network device, first indication information and a resource request message that are sent by user equipment UE; and allocating, by the network device to the UE according to the first indication information and the resource request message, time frequency resources used by the UE to send at least two pieces of second to-be-sent data in a resource scheduling period. According to the method in the embodiments of the present disclosure, data sending efficiency of the UE is improved.
Abstract:
Embodiments of the present invention provide a device-to-device D2D data transmission method, apparatus, and system. The method includes: receiving first data sent by a second device by using a first logical channel of multiple logical channels on a first link, and identifying a first channel feature of the first logical channel; determining, according to preset configuration information about a correspondence between channel feature information about the first link and channel feature information about a second link, a second channel feature on the second link that corresponds to the first channel feature of the first logical channel on the first link; and mapping, according to the second channel feature, the first data onto a second logical channel that that is of multiple logical channels on the second link and that corresponds to the second channel feature.
Abstract:
Embodiments of the present invention provide a data transmission method, a transmitting device, and a receiving device. The method includes: setting, by a transmitting device, a sending manner of a media access control layer service data unit MAC SDU according to a logical channel type of the MAC SDU; and sending, by the transmitting device according to the sending manner, a media access control layer protocol data unit MAC PDU obtained from the MAC SDU. If multiple transmitting devices simultaneously send MAC PDUs to the receiving device, the receiving device caches, to cache entities corresponding to the different transmitting devices, the MAC PDUs sent by the transmitting devices and processes the MAC PDUs. In this process, the receiving device can simultaneously process MAC SDUs sent by multiple transmitting devices, thereby improving data transmission reliability in D2D communication.
Abstract:
Embodiments of this application provide example communication methods and example devices. One example method includes sending information to a first node, where the information includes at least one of information about a first group of logical channel identities (LCIDs) or information about a second group of LCIDs, the first group of LCIDs includes an LCID used for access traffic, and the second group of LCIDs includes an LCID used for backhaul traffic. Another information can then be sent to the first node, where the another information is used to configure a radio link control (RLC) bearer of the first node, the RLC bearer includes a RLC layer entity and a logical channel, and when an LCID corresponding to the logical channel belongs to the first group of LCIDs, an upper protocol layer of a RLC layer is a packet data convergence protocol (PDCP) layer or an F1 interface protocol layer.