Method and device for feedback information transmission based on enhanced PHICH

摘要

The present invention relates to the field of communications. Disclosed are a method and a device for feedback information transmission based on an enhanced PHICH. The method comprises transmitting ACK/NACK feedback information to a terminal through E-PHICH sources configured in a PDSCH area; therefore, on one hand, the problem that the PHICH cannot be transmitted in some scenarios, such as an ABS sub-frame of eICIC and a subsequent possibly-defined extended carrier, is solved; and on the other hand, the signaling overhead can be saved, so that the utilization rate of resources is improved, for example, the scheduling of retransmission of a PUSCH is prevented from being carried out by a system though a DCI format 0, therefore, the effects of improving the capacity of the PHICH and solving the problem of legacy PHICH resource contention are achieved.

主权项

1. A method for feedback information transmission based on an enhanced Physical Hybrid Automatic Repeat Request, HARQ, Indicator Channel, PHICH, comprising:
determining time-frequency resources occupied by enhanced PHICHs configured in a Physical Downlink Shared Channel, PDSCH, region by a network side; notifying a user equipment of the determined time-frequency resources occupied by enhanced PHICHs; determining groups of enhanced PHICH resources for carrying Acknowledgement/Non-Acknowledgement, ACK/NACK, feedback information among the time-frequency resources occupied by the enhanced PHICHs according to a scheduling condition of the user equipment; and mapping the ACK/NACK feedback information to be transmitted onto the groups of enhanced PHICH resources and transmitting the ACK/NACK feedback information to the user equipment; wherein determining the groups of enhanced PHICH resources for carrying the ACK/NACK feedback information among the time-frequency resources occupied by the enhanced PHICHs according to the scheduling condition of the user equipment comprises: determining each Physical Resource Block, PRB, pair included in the time-frequency resources occupied by the enhanced PHICH; and attributing all of Resource Elements, REs, included in sub-carriers at a specified location among the respective PRB pairs to a group of enhanced PHICH resources; or attributing a specified part of REs in sub-carriers at a specified location among the respective PRB pairs to a group of enhanced PHICH resources; or attributing M REs in specified time domain and adjacent in frequency domain in each PRB pair, among the respective PRB pairs, to a group of enhanced PHICH resources, according to the scheduling condition of the user equipment, wherein M represents a pre-configured parameter; wherein mapping the ACK/NACK information to be transmitted onto the groups of E-PHICH resources comprises: simply encoding the ACK/NACK information to be transmitted; performing binary phase modulation on the simply encoded ACK/NACK information and orthogonally spreading obtained modulation symbols; and mapping the orthogonally spread modulation symbols respectively into the groups of enhanced PHICH resources; wherein mapping the orthogonally spread modulation symbols respectively into the groups of enhanced PHICH resources comprises: grouping the orthogonally spread modulation symbols in rows or columns and mapping the respective groups of modulation symbols respectively onto the REs belonging to the same group of enhanced PHICH resources among the respective PRB pairs.