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Control and transmission of uplink feedback information from WTRU in CELL_FACH state

A technology of control channel and E-DCH, which is applied in transmission path sub-channel allocation, transmission modification based on link quality, wireless communication, etc., and can solve problems such as low efficiency

Active Publication Date: 2014-02-05
INTERDIGITAL PATENT HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the network cannot maximize the downlink transmission rate, this processing makes the

Method used

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  • Control and transmission of uplink feedback information from WTRU in CELL_FACH state
  • Control and transmission of uplink feedback information from WTRU in CELL_FACH state
  • Control and transmission of uplink feedback information from WTRU in CELL_FACH state

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Experimental program
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Embodiment

[0055] CLAIMS 1. A method of transmitting uplink feedback information by a wireless transmit / receive unit (WTRU) in a CELL_FACH state.

[0056] 2. The method of embodiment 1, further comprising receiving a trigger event.

[0057] 3. The method as in any one of embodiments 1-2, further comprising transmitting uplink feedback information based on the trigger event.

[0058] 4. The method as in any one of embodiments 1-3 wherein the triggering event is characterized by the WTRU receiving a High Speed ​​Shared Control Channel (HS-SCCH) order.

[0059] 5. The method of embodiment 4, wherein the HS-SCCH order includes an indicator instructing the WTRU to enable or disable transmission of uplink feedback information.

[0060] 6. The method as in any one of embodiments 1-5 wherein the triggering event is characterized by receipt by the WTRU via an Enhanced Dedicated Channel (E-DCH) Absolute Grant Channel (E-AGCH) transmission.

[0061] 7. The method of embodiment 6, wherein the tra...

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Abstract

A method and apparatus for control of uplink feedback information in contention based wireless communications is disclosed. Uplink feedback information such as a channel quality information and hybrid automatic retransmission request (HARQ) acknowledgement / negative acknowledgement (ACK / NACK) information may be transmitted to the universal terrestrial radio access network (UTRAN) by a wireless transmit / receive unit (WTRU) based on explicit and implicit triggers. Providing more frequent and robust information relating to the channel conditions and HARQ status allows the UTRAN to more efficiently utilize the radio resources for downlink data transmissions.

Description

technical field [0001] This application relates to wireless communications. Background technique [0002] Enhanced uplink has currently been introduced as part of Release 6 of the 3rd Generation Partnership Project (3GPP) standard. Enhanced uplink works on rate request and grant mechanism. A wireless transmit / receive unit (WTRU) sends a rate request indicating the requested capacity, and the network responds to the rate request with a rate grant. The rate grant is generated by the Node B scheduler. WTRUs and Node Bs use a Hybrid Automatic Repeat Request (HARQ) mechanism for transmissions on the Enhanced Dedicated Channel (E-DCH). [0003] For enhanced uplink transmission, two uplink physical channels (E-DCH Dedicated Physical Control Channel (E-DPCCH) and E-DCH Dedicated Physical Data Channel (E-DPDCH)) are introduced in the transmission and three downlink physical channels (E-DCH Absolute Grant Channel (E-AGCH), E-DCH Relative Grant Channel (E-RGCH) and E-DCH HARQ Indic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08
CPCH04W72/1284H04W74/04H04L1/0003H04L1/0009H04L1/0026H04L1/1671H04L1/1685H04L1/1829H04W72/21H04L1/16H04W74/0833H04W72/23H04L1/1816H04L1/1861H04L5/0055H04W24/08
Inventor B·佩尔蒂埃C·R·凯夫D·帕尼R·迪吉罗拉墨P·马里内尔E·M·莱尔
Owner INTERDIGITAL PATENT HLDG INC