摘要:
The present invention discloses a data transmission method, a device, and a system, relates to the communications field, and can resolve a prior-art problem that a receive end cannot correctly receive data because a starting moment of sending information on a license-exempt spectrum cannot be determined. A specific solution is as follows: A first device detects first information of a first serving cell in a preset time period of a first subframe on a first time resource or a first time set of a subframe on a first time resource, determines a starting position of a second time resource according to the first information, and detects second information of the first serving cell in a second time set of a subframe on the second time resource. The present invention is used for data transmission.
摘要:
The present invention relates to the communications field, and discloses an information transmission method and a device, which can resolve a problem of excessively high overheads of scheduling signaling of data retransmission in an unlicensed spectrum. A specific solution is as follows: writing a data retransmission identifier of a first carrier into a preset field of a physical downlink control channel; generating a data scheduling instruction of the physical downlink control channel; sending, on a second carrier, the data scheduling instruction of the physical downlink control channel to a receiving device; and sending data that is on the first carrier on the second carrier according to the data scheduling instruction of the physical downlink control channel. The present invention is applied to information transmission.
摘要:
The invention discloses a method for transmitting and receiving downlink control information, a serving node and a user equipment. The method comprises: determining, by a serving node of a interfered UE, a protected resource, wherein the protected resource is located in at least one of the followings: a physical resource corresponding to a USS in a PDCCH, a physical resource corresponding to an expanded CSS in the PDCCH, a physical resource corresponding to a USS in an E-PDCCH or a physical resource corresponding to a CSS of the E-PDCCH; transmitting, by the serving node, first downlink control information of an interfered cell on the protected resource, wherein the first downlink control information comprises scheduling information for scheduling a paging message and/or a SIB1 message of the interfered cell. The invention can reduce the interference to a system broadcast message, a paging message and the like in a heterogeneous network.
摘要:
Embodiments of the present invention provide an uplink control information sending method, an uplink control information receiving method, an apparatus, and a system. The method includes: receiving, by a terminal device, channel indication information from an access network device on a physical control channel; determining the channel resource set that is of N channel resource sets and that matches a type or a size of the UCI as a first channel resource set; determining a channel resource that is in the first channel resource set and that is indicated by the channel indication information; and sending uplink control information UCI to the access network device on the channel resource. A quantity of bits that need to be added to the channel indication information in the embodiments of the present invention is less than that in the prior art, reducing consumption of downlink channel resources by the channel indication information in a delivery process.
摘要:
Embodiments of the present invention provide methods for sending and receiving feedback information, user equipment, and an access network device, relate to the field of communications technologies, and resolve a problem of low uplink resource utilization. In the embodiments of the present invention, UE receives, in a downlink subframe in a preconfigured downlink subframe subset, downlink data that is sent by an access network device by using a downlink shared channel and a DAI index indicator and a DAI total quantity indicator that are sent by using a downlink control channel, determines an uplink subframe used to send feedback information corresponding to the downlink shared channel, then determines a codebook of the feedback information according to the downlink assignment index DAI index indicator and the DAI total quantity indicator, subsequently performs channel coding on the feedback information according to the codebook, and finally sends, in the uplink subframe, the feedback information on which channel coding has been performed to the access network device. The solutions provided in the embodiments of the present invention are applicable during sending of feedback information.
摘要:
Embodiments of the present invention provide a channel state information transmission method, user equipment, and an access network device, to resolve at least a prior-art problem that multiple pieces of CSI cannot be simultaneously transmitted. The method includes: receiving, by UE, downlink data from an access network device; determining, by the UE, an uplink subframe used to send feedback information of the downlink data, where a first downlink subframe set associated with the uplink subframe includes a first subset and a second subset, and the first subset is a proper subset of the second subset; determining, by the UE, a channel resource used to send the feedback information, where the channel resource includes a first uplink channel resource or a second uplink channel resource; and if sending of r pieces of CSI is configured in the uplink subframe for the UE, a codebook size of the feedback information corresponds to the first subset, and the channel resource determined by the UE is the second uplink channel resource, sending, by the UE, the feedback information and t pieces of CSI of the r pieces of CSI on the second uplink channel resource.
摘要:
The present invention discloses a data scheduling method and apparatus, where the method includes: first, configuring a data scheduling granularity for a first wireless communications system on a carrier on a specific frequency spectrum; then, indicating an option of the data scheduling granularity to a terminal; finally, performing data scheduling for the terminal according to the data scheduling granularity indicated in the option of the data scheduling granularity, and indicating a corresponding data scheduling result to the terminal. Therefore, by means of the foregoing configured data scheduling granularity for the wireless communications system on the carrier on the specific frequency spectrum, when a specific frequency spectrum resource is used between systems, objectives of more even distribution and more use of a system resource are achieved.
摘要:
Embodiments of the present invention disclose a method and an apparatus for controlling uplink transmit power of UE, UE, and a base station, and the method includes: determining subframe configuration information, where the subframe configuration information is used to indicate base stations corresponding to all subframes in a radio frame; determining static power control parameters corresponding to all the base stations; determining a TPC adjustment value of a current subframe; and determining uplink transmit power of the current subframe according to a static power control parameter corresponding to a base station corresponding to the current subframe and the TPC adjustment value of the current subframe. In the embodiments of the present invention, when UE is connected to at least two base stations, control over uplink transmit power can be implemented when the UE sends data to different base stations.
摘要:
Embodiments of the present invention disclose a node synchronization method and apparatus, and relate to the field of communications technologies, where the method includes: selecting, by a first node, at least one user equipment UE, where the UE is used to assist a second node to synchronize with the first node; and sending, by the first node, a notification message to the at least one UE, so that the at least one UE assists the second node to implement synchronization with the first node. The present invention is applicable to time synchronization between communications nodes.