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Method for detecting radio link failure for transmission over enhanced dedicated channel in CELL_FACH state

A radio link, enhanced technology, used in transmission systems, wireless communications, digital transmission systems, etc., to solve problems such as undefined behavior

Active Publication Date: 2014-04-09
INTERDIGITAL PATENT HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the behavior of the WTRU with respect to the synchronization procedure proposed for the WTRU is not defined when it is operating in the CELL_FACH state

Method used

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  • Method for detecting radio link failure for transmission over enhanced dedicated channel in CELL_FACH state
  • Method for detecting radio link failure for transmission over enhanced dedicated channel in CELL_FACH state
  • Method for detecting radio link failure for transmission over enhanced dedicated channel in CELL_FACH state

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Experimental program
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Embodiment

[0062] 1. A method implemented in a wireless transmit receive unit (WTRU) for detecting radio link (RL) failure, the method comprising:

[0063] Monitor the quality of the downlink fractional dedicated physical channel (F-DPCH).

[0064] 2. according to the method described in embodiment 1, this method also comprises:

[0065] It is determined that the quality of the downlink F-DPCH is lower than a predefined threshold Q for N consecutive frames, where N is the predefined number of consecutive frames.

[0066] 3. according to the method described in any embodiment in embodiment 1-2, this method also comprises:

[0067] Announce the occurrence of RL failure; and

[0068] Termination of transmissions via the Enhanced Dedicated Channel (E-DCH) in the Cell Forward Access Channel (CELL_FACH) state.

[0069] 4. The method according to embodiment 3, wherein the termination of the E-DCH in the CELL_FACH state further comprises:

[0070] Release E-DCH resources;

[0071] stop the ...

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Abstract

A method and apparatus are used for detecting a radio link (RL) failure and a post verification process. A quality of a downlink fractional dedicated physical channel (F-DPCH) is monitored once a transmission on an enhanced dedicated channel (E-DCH) has begun. It is determined whether the quality of the downlink F-DPCH is below a predefined threshold. If the quality is below the predefined threshold, then an occurrence of an RL failure is declared and a transmission over the E-DCH in a cell forward access channel (CELL_FACH) state is terminated. In a case of the post verification failure, E-DCH resources are released.

Description

technical field [0001] This application relates to wireless communications. Background technique [0002] As part of the ongoing evolution of the Wideband Code Division Multiple Access (WCDMA) standard in Release 8 of the 3rd Generation Partnership Project (3GPP) standard, a new work item has been created to incorporate enhanced A dedicated channel (E-DCH) is combined for a wireless transmit receive unit (WTRU). [0003] Figure 1 shows the radio resource control (RRC) service states of a 3GPP WTRU with enhanced uplink (UL). A WTRU may operate in multiple states depending on user activity. The following states have been defined: Idle (IDLE), Cell Dedicated Channel (CELL_DCH), Cell Forward Access Channel (CELL_FACH), Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) Registration Area Paging Channel ( URA_PCH), and the cell paging channel (CELL_PCH). RRC state transitions are controlled by the network using radio network controller (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00
CPCH04W76/028H04W36/30H04W24/00H04W76/19H04W36/305H04W76/30H04W36/08H04W24/02H04W24/10H04W36/36H04W74/08H04W88/02
Inventor C·R·凯夫I·H·金B·佩尔蒂埃P·马里内尔D·帕尼
Owner INTERDIGITAL PATENT HLDG INC
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