Resource allocation and scheduling method, device and base station

The invention discloses a resource allocation and scheduling method and device and a base station, and the method comprises the steps: judging the resource condition of a current wireless channel when a preset type of target message needs to be scheduled, and determining that the current wireless channel does not meet the resource amount required for scheduling the target message based on a default first modulation and coding strategy. Under the condition that the target message cannot be scheduled due to the fact that the Msg4 does not access the Msg4, the target message is successfully scheduled by adaptively adjusting the modulation and coding strategy based on which the target message is scheduled, and the problem that the Msg4 uses the fixed MCS in the random access competition solving process of the current resource allocation scheme can be effectively solved. Therefore, the problem of scheduling failure caused by RB resource limitation during scheduling is solved, and the increase of UE access delay is