发明名称 |
METHOD AND SYSTEM FOR ADJUSTING UPLINK TRANSMISSION TIMING FOR LONG TERM EVOLUTION HANDOVER |
摘要 |
A method and system for adjusting uplink transmission timing when sending an initial transmission to a target cell/Node-B of an evolved universal terrestrial radio access network (E-UTRAN) immediately after handover from a source cell/Node-B of the E-UTRAN. In one embodiment, a user equipment (UE) autonomously computes and applies a timing advance (TA) value based on the current source cell/Node-B timing value, cell/Node-B beacon channel reference signal measurements and knowledge of the relative time difference, (if any), between the source and target cells/Node-Bs. In another embodiment, the UE sends a scheduling request message or real data packets with the computed TA value applied to the uplink transmission timing to the E-UTRAN via pre-allocated non-contention based uplink radio resources. In an alternate embodiment, the UE sends a scheduling request message with the new computed TA value applied to the UL transmission timing to an E-UTRAN via a synchronous random access channel (RACH). |
申请公布号 |
WO2007075559(A3) |
申请公布日期 |
2007.11.01 |
申请号 |
WO2006US48229 |
申请日期 |
2006.12.18 |
申请人 |
INTERDIGITAL TECHNOLOGY CORPORATION;TERRY, STEPHEN, E.;WANG, JIN |
发明人 |
TERRY, STEPHEN, E.;WANG, JIN |
分类号 |
H04B7/26;H04W36/00;H04W36/08;H04W56/00 |
主分类号 |
H04B7/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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