发明名称 |
Method and apparatus for performing an enhanced random access channel procedure in a Cell-FACH state |
摘要 |
A method and apparatus for performing an enhanced random access procedure in a Cell_FACH state are disclosed. A wireless transmit/receive unit (WTRU) transmits a random access channel (RACH) preamble for random access. If a positive acknowledgement (ACK) is received in response to the RACH preamble, the WTRU enters a contention resolution phase and transmits a message via an enhanced dedicated channel (E-DCH). If contention resolution fails, the RACH preamble is retransmitted. A contention back-off timer may be used for retransmission. A physical random access channel (PRACH) code may be reselected. The RACH preamble may be retransmitted using a reserved PRACH resource so that E-DCH resource is allocated to the collided WTRUs. Data transmitted during the contention resolution phase may remain in a hybrid automatic repeat request (HARQ) buffer. The MAC-i/is entity may be reset. All data sent during the contention resolution phase may be stored in a temporary buffer. |
申请公布号 |
US8428014(B2) |
申请公布日期 |
2013.04.23 |
申请号 |
US20080346498 |
申请日期 |
2008.12.30 |
申请人 |
CAVE CHRISTOPHER R.;DIGIROLAMO ROCCO;PANI DIANA;PELLETIER BENOIT;MARINIER PAUL;INTERDIGITAL PATENT HOLDINGS, INC. |
发明人 |
CAVE CHRISTOPHER R.;DIGIROLAMO ROCCO;PANI DIANA;PELLETIER BENOIT;MARINIER PAUL |
分类号 |
H04W4/00;H04B7/212 |
主分类号 |
H04W4/00 |
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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