METHOD AND SYSTEM FOR RECONFIGURING PREAMBLE FORMAT OF COGNITIVE RADIO SYSTEM

摘要

The present invention provides a method and system for reconfiguring a preamble format of a cognitive radio system. The method comprises: when performing spectrum resource reconfiguration, a base station sending preamble format configuration information to a subordinate terminal; and when the terminal is implementing a new service, the base station receiving an uplink access request from the terminal. In the present invention, after performing the spectrum resource reconfiguration, the base station sends the preamble format configuration information to the subordinate terminal to carry out reconfiguration of the preamble format, so that the preamble format can be flexibly configured according to the change of the spectrum resources. Especially when a frequency point for the reconfiguration of the spectrum resources is low, the preamble format can be configured to have a short code length. Therefore, the time-and-frequency resources are saved, and the resource utilization rate is improved.