name: OTD
full_form: Observed Time Difference
context: bandwidth of the sub-block shall be less than the channel bandwidth specified in Table 6.6.1-1. For combinations of intra-band and inter-band carrier aggregation with three uplink component carriers (up to two contiguously aggregated carriers per band), the occupied bandwidth is the bandwidth containing 99 % of the total integrated mean power of the transmitted spectrum on each E-UTRA band. The OBW shall be less than the channel bandwidth as specified in Table 6.6.1-1 for the E-UTRA band supporting one component carrier. The OBW shall be less than the aggregated channel bandwidth as specified in subclause 5.6A for the E-UTRA band supporting two contiguous component carriers.
description: Observed Time Difference (OTD) represents a Home NodeB's (HNB) timing with respect to a macro cell (MNB) as measured by the User Equipment (UE). The HNB-Gateway (HNB-GW) maintains a database of OTD values for HNBs under its control and their neighboring MNB cells, which is updated using information provided by UEs during handovers to MNB cells.
explanation: OTD is defined as a measurement of the time difference between a HNB and a macro cell. It's measured by the UE and used by the HNB-GW to synchronize HNBs with their neighboring MNB cells.
section_title: C.3.1	Construction and Update of OTD Database at the HNB-GW
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