Patent ID: 8717975

Claim:
A method for configuring a preamble, used in an orthogonal frequency division multiplex, OFDM, system of a fourth-generation communication system compatible with a third-generation communication system, wherein the third-generation communication system is 802.16e and the fourth-generation communication system is 802.16m, comprising: configuring, by a base station, a preamble of the fourth-generation communication system as comprising a first reference preamble and a second reference preamble, wherein the first reference preamble and the second reference preamble are located in different OFDM symbols; wherein the first reference preamble carries information of system application scenes, and the information of the system application scenes is indicated by different sequences of the first reference preamble; the system application scenes comprises: the fourth-generation communication system and the third-generation communication system using the same frequency of 5 MHz as the fourth-generation communication system, the fourth-generation communication system and the third-generation communication system using the same frequency of 10 MHz as the fourth-generation communication system, and the fourth-generation communication system existing independently; and the base station transmitting the configured preamble of the fourth-generation communication system.