Method for transmitting control information

摘要

The present invention discloses a method for transmitting control information. Downlink control information is categorized into common control information and dedicated control information. A physical broadcast channel is extended by dividing a common control channel domain into a plurality of narrowband sub-control channel domains by adding a position identifier. Before a connection is established, the common control information is sent, according to the position identifier, in each sub-control channel domain of the common control channel domain. After the connection is established, a sub-control channel domain with a channel state that complies with a set standard is selected, according to a channel state of each sub-control channel domain, for sending the dedicated control information.

主权项

1. A method for transmitting control information, the method comprising:
categorizing downlink control information into common control information and dedicated control information; before a connection is established between a network and a first narrowband user terminal of a plurality of narrowband user terminals, sending, by a base station, according to a position identifier in a physical broadcast channel, the common control information in each of a plurality of narrowband sub-control channel domains of a common control channel domain, wherein the physical broadcast channel is extended by adding the position identifier used for indicating a time-frequency position of the common control channel domain, and the common control channel domain is divided into the plurality of narrowband sub-control channel domains, wherein the common control channel domain is an allocated time-frequency resource of a first size, and each of the plurality of the narrowband sub-control channel domains is an allocated time-frequency resource having a size that is smaller than the first size, the common control channel domain encompassing the plurality of the narrowband sub-control channel domains, and wherein the common control channel domain carries control information that is common to the plurality of narrowband user terminals; allocating, by the base station, a random access resource dedicated for the first narrowband user terminal; notifying the first narrowband user terminal in system information; after the connection is established, selecting, by the base station according to a channel state of each of the narrowband sub-control channel domains, a narrowband sub-control channel domain with a channel state that complies with a set standard, for sending dedicated control information; sending, by the base station, a channel instruction, wherein the channel instruction is information used by the base station to instruct, according to the channel state of the each of the narrowband sub-control channel domains, the first narrowband user terminal to select the narrowband sub-control channel domain that complies with the set standard; and sending, by the base station, the dedicated control information to the first narrowband user terminal using the selected narrowband sub-control channel domain of the common control channel domain.