Method for sending hybrid automatic repeat request acknowledgement message and user equipment

摘要

The disclosure discloses a method for sending a Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) message in a Time Division Duplex (TDD) system and a User Equipment (UE), in order that the UE feeds back the HARQ-ACK message of each downlink serving cell and downlink subframe in Physical Uplink Control Channel (PUCCH) format 1b with channel selection in the TDD system. When there are more than 1 downlink subframes in a downlink subframe window corresponding to an uplink subframe, the feedback mode when the UE feeds back the HARQ-ACK message in format 1b with channel selection is determined through the configuration of the high layer or according to the result about whether the UE receives the Physical Downlink Shared Channel (PDSCH) from a secondary downlink serving cell. In feedback mode 1, the UE adopts the mapping table defined by Long Term Evolution Advanced (LTE-A) (Rel-10), generates the HARQ-ACK message in the mapping table by a time domain bundling method, and determines the corresponding PUCCH resources in the mapping table by a preset new PUCCH resource determining method.

主权项

1. A method for sending a Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) message, comprising:
when there are more than 1 downlink subframes in a downlink subframe window corresponding to an uplink subframe, determining, through high-layer signalling configuration or according to whether a User Equipment (UE) receives Physical Downlink Shared Channel (PDSCH) from a secondary downlink serving cell, a feedback mode used when the UE feeds back the HARQ-ACK message in PUCCH format 1b with channel selection, wherein the feedback mode comprises: feedback mode 1, in which the UE adopts an LTE-A mapping table, i.e., a mapping table, between a state combination {HARQ-ACK(i),i=0,1,2,3} of the HARQ-ACK message and a selected Physical Uplink Control Channel (PUCCH) index as well as information of two bits b(0)b(1) carried in the channel, generates the HARQ-ACK message in the mapping table in a time domain bundling manner, and determines corresponding PUCCH resources in the mapping table by using a preset PUCCH resource determining approach; and feedback mode 2, in which the UE adopts an LTE mapping table, or the LTE-A mapping table, or an LTE or LTE-A mapping table assigned by the high layer signalling, generates the HARQ-ACK message in the mapping table by using an HARQ-ACK generating approach in an HARQ-ACK multiplexing mode of an LTE system, and determines the corresponding PUCCH resources in the mapping table by using a PUCCH resource determining approach in the HARQ-ACK multiplexing mode of the LTE system, wherein the determining the feedback mode through the high-layer signaling configuration comprises: if the high-layer signaling is feedback mode selection signaling, determining the feedback mode by the UE according to the received high-layer signaling; or, if the high-layer signaling is a carrier aggregation signaling, adopting feedback mode 1 for feedback when a plurality of serving cells are configured for the UE, and adopting feedback mode 2 for feedback when only one serving cell is configured for the UE.