Timing advance design for extended component carriers

摘要

To provide a timing advance design for an enhanced component carrier.SOLUTION: Methods, systems, and devices for wireless communication are described. A base station may establish a transmission gap between downlink (DL) transmission and uplink (UL) transmissions on a shared radio frequency (RF) spectrum band using time division duplex (TDD). Length of the gap may be based at least in part on maximum allowed length of a filler signal corresponding to a coverage area of the base station. To reserve a shared band, a user device (UE) may communicate the filler signal for length of time that is based at least in part on the maximum allowed length and geographic distance between the UE and the base station. The UE farther from the base station transmits the filler signal of shorter length before sending UL transmission, so that the UL transmission from a different UE arrives at the same time at the base station regardless of the geographic distance between the UEs.SELECTED DRAWING: Figure 2