摘要:
A downlink receiving status feedback method is disclosed. The method comprises: a control parameter, which is used for indicating a feedback mode used by a terminal for feeding back downlink receiving status, is carried in a radio resource control (RRC) signaling which is transmitted to the terminal (1) by a base station (2). The terminal feeds data receiving status corresponding to PDSCHs in multiple downlink sub-frames back to the base station in one uplink sub-frame according to the current feedback mode, current configurations of uplink sub-frames and downlink sub-frames, and an uplink feedback timing relation defined by a system.
摘要:
Disclosed are a method and device for sending answer information, wherein, when a frequency division duplex (FDD) and a time division duplex (TDD) aggregate, where a TDD cell serves as a primary serving cell and a FDD cell works as a secondary serving cell, a user equipment (UE) groups downlink subframes of the FDD secondary serving cell, and different downlink subframe groups use different hybrid automatic repeat request (HARQ) timing relationships, determines uplink subframes where HARQ-ACK acknowledgment messages corresponding to physical downlink shared channels (PDSCHs) of the downlink subframe groups are transmitted, and sends the HARQ-ACK messages on the determined uplink subframes.
摘要:
Provided are a method and apparatus for sending Hybrid Automatic Repeat Request Acknowledge (HARQ-ACK) information. The method includes: when a terminal employs a physical uplink control channel (PUCCH) format 3 to transmit HARQ-ACK information and the HARQ-ACK information is transmitted over a uplink physical shared channel (PUSCH), determining the number of downlink subframes for serving cells to feed back the HARQ-ACK information; determining the number of encoded modulated symbols required for sending the HARQ-ACK information according to the determined number of downlink subframes; and mapping the HARQ-ACK information to be sent to the PUSCH of a specified uplink subframe according to the number of encoded modulated symbols and sending the HARQ-ACK information. The technical solutions provided by the present invention are applied to improve the performance of the HARQ-ACK information, and thus improve the data performance.
摘要:
A base station, a terminal, a system and methods for performing data transmission in a Time Division Duplex (TDD) system are disclosed. One of the methods includes: the base station sending an uplink scheduling grant signaling to the terminal on a carrier m, and after receiving uplink data sent by the terminal through a Physical Uplink Shared Channel (PUSCH) on a carrier n, the base station sending an ACK/NACK feedback signaling corresponding to the PUSCH to the terminal on the carrier m; wherein, m ‰ n; a timing relationship between a subframe by which the base station sends the uplink scheduling grant signaling and/or the ACK/NACK feedback signaling and a subframe where the PUSCH is located is identical with a Hybrid Automatic Repeat Request (HARQ) timing relationship corresponding to an uplink/downlink configuration of the carrier m or the carrier n. By using the above technical scheme, HARQ timing relationships can be used to implement cross-carrier scheduling and an EICIC function, and a lower complexity of devices also can be maintained in the meantime.
摘要:
The disclosure discloses a method and system for transmitting a Physical Random Access Channel (PRACH). The method includes: in a Carrier Aggregation (CA) scenario, a base station transmits, in a Primary Serving Cell (Pcell) or a Secondary Serving Cell (Scell), a random access trigger message to a User Equipment (UE) (401); the UE transmits, in the Scell, a PRACH (402); and the base station transmits, in the Pcell or an Scell, a random access procedure message to the UE (403). With the disclosure, a PRACH can be transmitted in an Scell in the CA scenario.
摘要:
A configuration method and an indication method of MBSFN frames and an identifying method used by a terminal applied in a long term evolution system are disclosed in the present invention, which include: an access network sends configuration parameters of the MBSFN frame to a mobile terminal determining whether the wireless frame received is an MBSFN frame according to the configuration parameters, the configuration parameters including a repetition period of the MBSFN frames distributed in system-set time. With the present invention, it could consume less bytes in system message to complete the configuration of the MBSFN sub-frames and could save system resources.
摘要:
A method and an apparatus for constructing a random access channel of a wireless communication system, in which the method includes the following steps: setting a length of a preamble; setting a length of a cyclic prefix according to the length of the preamble; and setting a random access channel structure consisting of the preamble and the cyclic prefix. The random access channel designed by the method can be flexibly set to transmit in the UpPTS, and can satisfy the demand of a small coverage scenario in a better manner.