The present disclosure provides a method (700) and a network node (800) for coordination of channel resources between a first transmission and a second transmission sharing a common channel. The method (700) includes: detecting (S710) a first traffic status of the first transmission and a second traffic status of the second transmission during a time period; and applying (S720) one of a first frame configuration and a second frame configuration to a frame based on a probability value dependent on the first traffic status and the second traffic status. When the first frame configuration is applied to the frame, the first transmission uses the channel within the duration of the frame regardless of whether the second transmission is using the channel. When the second frame configuration is applied to the frame, the first transmission is disabled or shares the channel with the second transmission in a contention-based manner within the duration of the frame.