| CPC H04W 72/0446 (2013.01) [H04L 27/2605 (2013.01)] | 12 Claims |
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1. A method comprising:
receiving, by an integrated access and backhaul (IAB) node including a distributed unit (DU) and a mobile terminal (MT), a signal informing of a number of guard symbols; and
performing, by the IAB node, a switching scenario among a plurality of switching scenarios,
wherein the plurality of switching scenarios comprising i) switching from a first operation of the MT to a second operation of the DU, and ii) switching from a third operation of the DU to a fourth operation of the MT,
wherein the plurality of switching scenarios are distinguished based on both i) operation directions, which comprise a transmission and a reception, of the MT and the DU and ii) timing mode cases of the MT and the DU,
wherein the timing mode cases comprise a case 1, a case 6 and case 7,
wherein, in the case 1, the IAB node determines a time of MT transmission based on timing advance (TA) configuration information which is provided,
wherein, in case 6, the IAB node determines a time of the MT transmission based on a time of DU transmission of the IAB node,
wherein, in case 7, the IAB node determines a time of the MT transmission based on additional TA configuration information which is provided,
wherein the guard symbols are not used for the MT in a slot where the IAB node transitions between the MT and the DU based on the switching scenario,
wherein a first timing mode case for the MT and a second timing mode case for the DU are different from each other, and
wherein, in the signal, a separate value for the number of guard symbols is specified for each of the plurality of switching scenarios.
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