Patent ID: 6469995
Filing Date: 2002-10-22
Classification: H04B,H04L,H04W

Abstract:
A mobile radio communication system, comprising:a first communication system employing a code division multiple access method of transmitting frames via a first superframe which is formed of a plural frames and contains a specified first system idle period; and a second communication system employing another method for transmitting frames via a second superframe for downlink traffic containing a specified second system idle period for observing a frequency component of a control channel of the second communications system, the specified second system idle period being inserted in the second superframe based on a difference between an integer multiple number of frames of the second superframe and another number of frames of a third superframe for the control channel of the second communications system, wherein, said first communication system performs error correction and interleaving before transmitting frames, a duration of the specified first system idle period is at most half of duration of a single frame of the first superframe and is inserted in the first superframe at a regular or irregular interval of a specified number of slots, and the frequency component of the control channel of said second communication system is observed from said first communication system via the first system.