Patent ID: 9014134
Filing Date: 2015-04-21
Classification: H04L,H04W

Abstract:
1. A method of operating a wireless terminal in a wireless communication environment, comprising: receiving a downlink signal from a base station; determining downlink signal timing information from the received signal; deriving at the wireless terminal an uplink transmission time for an access request signal as a function of the determined downlink timing information, wherein the access request signal comprises a first set of tones and a second set of tones; transmitting the first set of tones of the access request signal to the base station during a first time period of an access request interval, the transmitted first set of tones comprising contiguous tones, wherein a beginning of the first time period is a function of the derived uplink transmission time, and wherein a number of tones in the first set of tones is a multiple of 8; and transmitting the second set of tones of the access request signal during a second time period of the access request interval, wherein the second time period is contiguous with the first time period.