CPC H04W 74/0841 (2013.01) [H04W 72/1263 (2013.01); H04W 74/0866 (2013.01)] | 20 Claims |
1. A method implemented by Wireless Transmit/Receive Unit (WTRU), the method comprising:
receiving, by the WTRU from a Network Access Point (NAP), configuration information indicating a set of preambles and corresponding propagation-delay thresholds;
determining propagation-delay information associated with a distance between the WTRU and the NAP or a location in a coverage area of the NAP;
selecting a subset of preambles from the set of preambles based on the determined propagation-delay information;
randomly selecting a preamble from the selected subset of preambles; and
sending the randomly selected preamble to the NAP.
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