A channel resource management method performed by a first communication node in a communication system may comprise: monitoring channel information broadcast packets transmitted from other communication nodes; receiving a first broadcast packet, which is a channel information broadcast packet transmitted from a third communication node that is included in the other communication nodes and performs one-to-one communication with a second communication node included in the other communication nodes; and managing a one-to-one channel resource for one-to-one communication with a fourth communication node included in the other communication nodes based on information included in the first broadcast packet, wherein the first broadcast packet includes information on a first one-to-one channel resource allocated for one-to-one communication between the second and third communication nodes.