Patent ID: 9042477
Filing Date: 2015-05-26
Classification: H04L,H04W

Abstract:
1. A transmission apparatus communicating with first and second reception apparatuses, the transmission apparatus comprising: a first preamble transmitter configured to repeatedly transmit a first preamble and first data to the first reception apparatus; and a second preamble transmitter configured to transmit a second preamble and second data to the first reception apparatus and the second reception apparatus, wherein the second preamble transmitter is configured to repeatedly transmit the second preamble during a time interval that the first preamble is transmitted in response to the first preamble being repeatedly transmitted, and wherein the first preamble is detected by the first reception apparatus by correlating a first correlation signal with the first preamble received from the transmission apparatus and by detecting that a length of the first correlation signal is the same as a length of a first interval in which the first preamble is transmitted, and the second preamble is detected by the second reception apparatus by correlating a second correlation signal with the second preamble received from the transmission apparatus and by detecting that a length of the second correlation signal is the same as a length of a second interval in which the second preamble is transmitted.