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    • 8. 发明申请
    • MAINTAINING TIME ALIGNMENT WITH MULTIPLE UPLINK CARRIERS
    • 维护与多个UPLINK运营商的时间对齐
    • US20120008600A1
    • 2012-01-12
    • US12986549
    • 2011-01-07
    • Paul MarinierBhaskar M. AnepuGhyslain PelletierRobert L. Olesen
    • Paul MarinierBhaskar M. AnepuGhyslain PelletierRobert L. Olesen
    • H04W72/04
    • H04W56/0005H04L5/001H04L27/2646H04W56/0045H04W74/0833
    • Maintaining time alignment with multiple carriers is contemplated. A group of uplink carriers (UL CC sets) that operate with a single Timing Advance (TA) may be determined, and a TA value may be applied to a specific UL CC set. A wireless transmit/receive unit's (WTRU) capability of using multiple TAs may define a group index of a few bits for each UL CC set. A TA Command received in a Random Access Response message may be used to apply the TA value to each UL carrier of the UL CC set. The WTRU may determine which UL CC set the TA value applies to based on which DL carrier the command was transmitted from. The WTRU may determine which UL CC set the TA value applies to based on the Group Index being explicitly provided in the command. The WTRU may release multi-CC configurations upon Time Alignment Timer (TAT) expiry.
    • 考虑与多个载体维持时间对准。 可以确定以单个定时提前(TA)操作的一组上行链路载波(UL CC集),并且可以将TA值应用于特定的UL CC集合。 使用多个TA的无线发射/接收单元(WTRU)能力可以为每个UL CC集合定义几比特的组索引。 可以使用在随机接入响应消息中接收的TA命令将TA值应用于UL CC集合的每个UL载波。 WTRU可以基于从哪个DL载波发送命令来确定哪个UL CC设置TA值适用于哪个DL载波。 基于在命令中明确提供的组索引,WTRU可以确定应用TA值的哪个UL CC设置。 当时间对准定时器(TAT)到期时,WTRU可以释放多CC配置。