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Cell configuration parameters

專利號
US11528765B2
公開日期
2022-12-13
申請人
Ofinno, LLC（US VA Reston）
發(fā)明人
Taehun Kim; Esmael Hejazi Dinan; Kyungmin Park; Jinsook Ryu
IPC分類
H04W76/15; H04W48/20; H04W74/08
技術(shù)領(lǐng)域
ue,rrc,may,pscell,cell,station,pcell,or,message,base
地域： VA VA Reston

摘要

A wireless device receives, from a first base station, at least one radio resource control (RRC) message. The at least one RRC message comprises master cell group (MCG) configuration parameters of a primary cell (PCell) of the first base station and secondary cell group (SCG) configuration parameters of a primary SCG cell (PSCell) of a second base station, for dual connectivity of the wireless device with the first base station and the second base station. The wireless device determines a failure of the PCell before the PSCell configuration is applied. Based on the failure of the PCell, the wireless device performs a cell selection. In response to the selected cell being the PSCell, the wireless device synchronizes with the PSCell based on the SCG configuration parameters.

說明書

The SS/PBCH block may span one or more OFDM symbols in the time domain (e.g., 4 OFDM symbols, as shown in the example of FIG. 11A) and may span one or more subcarriers in the frequency domain (e.g., 240 contiguous subcarriers). The PSS, the SSS, and the PBCH may have a common center frequency. The PSS may be transmitted first and may span, for example, 1 OFDM symbol and 127 subcarriers. The SSS may be transmitted after the PSS (e.g., two symbols later) and may span 1 OFDM symbol and 127 subcarriers. The PBCH may be transmitted after the PSS (e.g., across the next 3 OFDM symbols) and may span 240 subcarriers.

The location of the SS/PBCH block in the time and frequency domains may not be known to the UE (e.g., if the UE is searching for the cell). To find and select the cell, the UE may monitor a carrier for the PSS. For example, the UE may monitor a frequency location within the carrier. If the PSS is not found after a certain duration (e.g., 20 ms), the UE may search for the PSS at a different frequency location within the carrier, as indicated by a synchronization raster. If the PSS is found at a location in the time and frequency domains, the UE may determine, based on a known structure of the SS/PBCH block, the locations of the SSS and the PBCH, respectively. The SS/PBCH block may be a cell-defining SS block (CD-SSB). In an example, a primary cell may be associated with a CD-SSB. The CD-SSB may be located on a synchronization raster. In an example, a cell selection/search and/or reselection may be based on the CD-SSB.

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