A resource allocation method of a subscriber station in a service negotiation system is provided. The resource allocation method includes gathering statistics of bursty data, bandwidth grant situation, and measuring wireless signal quality. The subscriber station switches its operation mode according to the statistics and bandwidth data derived by the signal measurement. When the subscriber station in a wireless system switches into a normal operation mode, it allocates bandwidth to management message and numbers of data connections to satisfy the quality of service (QoS) of each connection. When the subscriber station in a wireless system switches into an emergency operation mode, it allocates bandwidth to management message and unsolicited grant service (UGS).