Channel structure for non-contention based windows and contention based random access requests
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United States of America Patent
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Oct 20, 2015
Grant Date -
Mar 22, 2012
app pub date -
Sep 22, 2010
filing date -
Sep 22, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
Methods of communicating location information from a subscriber to a repeater are described. The subscriber switches from a working channel to a data revert channel, transmits a request for a periodic or one-time window to transmit an update, and determines from grant information in the response announcement the allocated window and frame before switching back to the working channel. Before the allocated time, the subscriber switches to the data revert channel, confirms whether it remains scheduled to transmit the update from a repeater announcement, and if so transmits the location update in either the current or reserved window. The announcements from the repeater contain the identity of the next window and frame and the subscriber reserved to use the window in addition to grant information. The subscribers may or may not be time-aligned and the data and data revert channels may or may not be synchronized.
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