Abstract: A method for device-to-device (D2D) communication includes sensing D2D resources from a pool of resources for a predetermined duration to produce measurements of the D2D resources and determining statistics in accordance with the measurements of the D2D resources. The method also includes determining a first subset of the D2D resources in accordance with the statistics and transmitting, by a first user equipment (UE) to a second UE, data over the first subset of the D2D resources.

Abstract: An embodiment of a system for operating a communications controller for a group of user equipments engaged in a DMC link in a wireless communications system is provided. The communications controller is configured to allocate a set of subframes in one periodic group of subframes to the group of UEs for the DMC link, signal the set of allocated subframes to the group of UEs, and transmit parameters related to a group of HARQ processes of the DMC link. In an embodiment, the communication controller uses HARQ processes for cellular UE transmission that are determined independently from HARQ processes of the group of HARQ processes for the DMC link, and the parameters are configured to enable the group of UEs to manage the group of HARQ processes for the DMC link.

Abstract: Embodiments of the present invention propose a D2D communications method, apparatus, and system. In the solution, a D2D SPS available period in which a first terminal is capable of using a D2D SPS resource is greater than one SC period. Therefore, in the D2D SPS available period, the first terminal needs to determine the D2D SPS resource only one time, and a second terminal also needs to decode SCI only one time to determine the D2D SPS resource. In this way, the first terminal does not need to determine a D2D SPS resource in each SC period, and the second terminal also does not need to decode SCI in each SC period to determine the D2D SPS resource. Therefore, D2D communication efficiency is improved.

Abstract: A system and method for adapting code rate are provided. A method for a first communication device to transmit a resource assignment to at least one communication device includes assigning at least one transmission resource to transmit the resource assignment, adapting a code rate of an encoded payload based on the at least one transmission resource and a threshold, thereby producing an adapted payload, and transmitting the adapted payload.

Abstract: Embodiments of the present invention provide a PDSCH transmission method and apparatus. The method includes: detecting a downlink control channel for scheduling a PDSCH; determining a resource allocation scheme of the PDSCH according to a DCI format of the downlink control channel for scheduling the PDSCH and an attribute of a carrier for carrying the PDSCH; and decoding the PDSCH according to the resource allocation scheme of the PDSCH and a transmission scheme of the PDSCH. The embodiments of the present invention provide an effective solution to PDSCH transmission.

Abstract: Embodiments of the present invention provide a physical downlink control channel transmission method and apparatus. The transmission method includes: obtaining, by UE, a parameter set for transmitting a first physical downlink control channel, where the first physical downlink control channel is used for sending same downlink control information DCI in at least R subframes; determining, by the UE according to the parameter set, N candidate locations for transmitting the first physical downlink control channel by a base station, where the candidate location includes the R subframes; monitoring, by the UE at the N candidate locations, whether the base station sends the first physical downlink control channel; and receiving, by the UE at a first candidate location, the first physical downlink control channel sent by the base station, where the N candidate locations include the first candidate location.

Abstract: When the frequency resource allocation is conveyed on a bandwidth that is different from a bandwidth on which the frequency resource allocation is sent, a receiving D2D UE needs to understand the resource allocations. A resource allocation method for device-to-device resource allocation is provided according to an example. The resource allocation method includes a first D2D user equipment (UE) receiving a downlink control information (DCI) from an access point, wherein the DCI comprises a first D2D frequency allocation and the first D2D frequency allocation comprises a first resource allocation field for transmission of data; setting a second resource allocation field of a second D2D frequency allocation of a sidelink control information (SCI) format according to the first resource allocation field; transmitting the SCI format to one or more additional D2D UEs; and transmitting the data on the resource according to the second D2D resource allocation.

Abstract: A frequency domain resource configuration method and apparatus, the method including obtaining, by a base station, a first frequency hopping parameter set of UE in N sub-bands, where the N sub-bands have a mapping relationship with a frequency hopping pattern that is indicated by the first frequency hopping parameter set, where the sub-band is a length of consecutive frequency domain resources in a system bandwidth, and where N?1, and further including sending, by the base station, first configuration information to the UE, where the first configuration information includes sub-band identifiers of the N sub-bands and the first frequency hopping parameter set.

Abstract: Embodiments provide an information processing method, user equipment, and a base station, where the information processing method includes: obtaining, by user equipment, a coverage enhancement requirement; and communicating, by the user equipment, with a base station according to the coverage enhancement requirement. The user equipment obtains the coverage enhancement requirement and communicates with the base station according to the coverage enhancement requirement.

Abstract: A system and method for adapting code rate are provided. A method for a first communication device to transmit a resource assignment to at least one communication device includes assigning at least one transmission resource to transmit the resource assignment, adapting a code rate of an encoded payload based on the at least one transmission resource and a threshold, thereby producing an adapted payload, and transmitting the adapted payload.

Abstract: A downlink channel decoding method, a downlink information transmission method, a user equipment, and a base station are provided. The downlink channel decoding method includes: determining, by a user equipment, a resource unit occupied by a DMRS; and decoding a downlink channel based on the DMRS transmitted on the resource unit. The present invention can enable different DMRS patterns to concurrently exist on an NCT carrier. In a downlink transmission process, a DMRS pattern used for downlink transmission is determined according to priorities of different channels and/or signals, which can ensure optimal performance of a high-priority channel and/or signal, and can further improve downlink transmission performance.

Abstract: When at least one of device-to-device UEs in connections of a group of D2D UEs is outside of the coverage area of mobile network of an access point, an information exchange mechanism established directly between the D2D UEs without involving a third party, is provided. A Sidelink Control Information (SCI) message type comprises one or more format flags indicating the respective resource allocation format, obtaining a first SCI message, adjusting a size of the first SCI message based on the determined size, and transmitting the adjusted first SCI message by a first UE in a Physical Sidelink Control Channel (PSCCH) to one or more second UEs for establishing the D2D communication link.

Abstract: Embodiments provide an information processing method, user equipment, and a base station, where the information processing method includes: obtaining, by user equipment, a coverage enhancement requirement; and communicating, by the user equipment, with a base station according to the coverage enhancement requirement. The user equipment obtains the coverage enhancement requirement and communicates with the base station according to the coverage enhancement requirement.

Abstract: Embodiments are provided herein for determining a synchronizing master for device-to-device (D2D) communication in a cellular network environment. In an embodiment, a user equipment (UE) receives a discovery signal comprising a timing reference, and determines a transmitter of the discovery signal. In accordance with the determination of the transmitter of the discovery signal, the UE performs one of synchronizing to the timing reference in the discovery signal and transmitting a second discovery signal. The UE performs the synchronizing to the timing reference if the transmitter of the discovery is a cellular network. Alternatively, the UE transmits the second discovery signal upon determining that the transmitter of the discovery signal is a second UE that is out of coverage of a cellular network.

Abstract: The present invention provides a downlink channel decoding method, a downlink information transmission method, a user equipment, and a base station. The downlink channel decoding method includes: determining, by a user equipment, a resource unit occupied by a DMRS; and decoding a downlink channel based on the DMRS transmitted on the resource unit. The present invention can enable different DMRS patterns to concurrently exist on an NCT carrier. In a downlink transmission process, a DMRS pattern used for downlink transmission is determined according to priorities of different channels and/or signals, which can ensure optimal performance of a high-priority channel and/or signal, and can further improve downlink transmission performance.

Abstract: User Equipments (UEs) may be assigned a set of aggregated component carriers for downlink carrier aggregation and/or carrier selection. Some UEs may be incapable of transmitting uplink signals over all component carriers in their assigned set of aggregated component carriers. In such scenarios, a UE may need to perform SRS switching in order to transmit SRS symbols over all of the component carriers. Embodiments of this disclosure provide various techniques for facilitating SRS switching. For example, a radio resource control (RRC) message may be used to signal a periodic SRS configuration parameter. As another example, a downlink control indication (DCI) message may be used to signal an aperiodic SRS configuration parameter. Many other examples are also provided.

Abstract: A system and method for transmitting a reference signal in a cell that uses an unlicensed frequency band. The method includes determining a candidate resource set that is used when a first reference signal is transmitted in the cell that uses the unlicensed frequency band, where the candidate resource set includes a preset resource and at least one flexible candidate resource, determining a first candidate resource that is used when the first reference signal is transmitted in the cell that uses the unlicensed frequency band, where a channel on the unlicensed frequency band corresponding to the first candidate resource is in an idle state, and the first candidate resource is the preset resource or a flexible candidate resource in the candidate resource set, and sending the first reference signal on the first candidate resource.

Abstract: An embodiment of a system for operating a communications controller for a group of user equipments engaged in a DMC link in a wireless communications system is provided. The communications controller is configured to allocate a set of subframes in one periodic group of subframes to the group of UEs for the DMC link, signal the set of allocated subframes to the group of UEs, and transmit parameters related to a group of HARQ processes of the DMC link. In an embodiment, the communication controller uses HARQ processes for cellular UE transmission that are determined independently from HARQ processes of the group of HARQ processes for the DMC link, and the parameters are configured to enable the group of UEs to manage the group of HARQ processes for the DMC link.

Abstract: When at least one of device-to-device UEs in connections of a group of D2D UEs is outside of the coverage area of mobile network of an access point, an information exchange mechanism established directly between the D2D UEs, without involving a third party, is provided. A resource allocation method for a device-to-device (D2D) communication link between two or more D2D user equipments (UEs) in a mobile communication network is provided according to an example.

Abstract: A method for operating a user equipment (UE) in a UE group including at least two UEs includes receiving, from a communications controller, network resources information about an allocation of a first set of network resources to the UE group and a transmission indication, where the transmission indication indicates that the UE is selected to transmit in a second set of network resources that is a subset of the first set of network resources. The method further includes transmitting, to other UEs in the UE group utilizing a direct mobile communications (DMC) link associated with the communications controller, a first message including a control indicator in a first subset of the second set of network resources, the control indicator indicating scheduling information for a second subset of the second set of network resources.