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A novel radio resource management strategy based on cooperative communication is analyzed via the two-state Markov model, which can allocate the idle resource via relay nodes to the subscribers who are out of service with effective radio resource utilization. According to the TDD-LTE, a simulation system of two-hop is established to verify it. Compared with the non-cooperative system, the novel strategy improves the bandwidth allocation efficiency and the throughput of chain. Meanwhile it is capable of providing delay assurance for varied services with guaranteed QoS requirements.