Method and device for downlink data transmission

摘要

The present invention relates to the technical field of communications. Disclosed are a method and device for downlink data transmission for use in reducing network resource wastage when a network side is transmitting data to a certain group of user terminals, thus increasing network resource utilization rate. The method comprises: grouping specific user terminals into a group, and identifying each group with a unique Group ID; a user terminal, when idle, monitors paging messages intended for it, and a first message; when a network side is transmitting downlink data, the network side transmits downlink data transmission scheduling information, and pages the group of user terminals at a timing of the group by means of the first message carrying the Group ID of the group; the user terminals that have received the first message receive the downlink data at a time window and a fixed physical resource position on the basis of the group-based downlink data transmission scheduling information received. This reduces waste of network resources in M2M communications when the network side is transmitting data to a certain group of user terminals, thus increasing the effect of network resource utilization rates.

主权项

1. A method for downlink data transmission, comprising:
sending downlink data transmission scheduling information to a user equipment; obtaining a corresponding occasion of sending a first message, wherein the first message is used for instructing the user equipment to receive downlink data; sending the first message to the user equipment at the occasion; and transmitting the downlink data to the user equipment according to the downlink data transmission scheduling information; wherein transmitting the downlink data to the user equipment according to the downlink data transmission scheduling information comprises:
transmitting the downlink data to the user equipment according to downlink data transmission time length, a position of a starting subframe bearing downlink data transmission and downlink data transmission intervals indicated in the downlink data transmission scheduling information; or wherein transmitting the downlink data to the user equipment according to the downlink data transmission scheduling information comprises:
scheduling the downlink data transmission to the user equipment through a control channel according to a physical resource position indicated by the downlink data transmission scheduling information within monitoring time length of the control channel indicated by the downlink data transmission scheduling information, andtransmitting the downlink data to the user equipment based on resources scheduled by the control channel; or wherein transmitting the downlink data to the user equipment according to the downlink data transmission scheduling information comprises:
determining a time point of starting to send the data in a following formula, and transmitting the downlink data to the user equipment according to downlink data transmission time length, a position of a starting subframe bearing the downlink data transmission and downlink data transmission intervals indicated in the downlink data transmission scheduling information at the time point determined in the following formula:
SFN mod m=0wherein m is the time length, and the time length is an integer multiple of a paging cycle.