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.
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Specification Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Multiple access
Product
Use Cases
Wireless communication
Services
Claim
1. A method implemented in a wireless transmit receive unit (WTRU) for detecting a radio link (RL) failure, the method comprising: monitoring a quality of a downlink fractional dedicated physical channel (F-DPCH); determining that the quality of the downlink F-DPCH is below a predefined threshold, Q, for N consecutive frames, wherein N is a predefined number of consecutive frames; declaring an occurrence of RL failure; and terminating a transmission via an enhanced dedicated channel (E-DCH) in a cell forward access channel (CELL_FACH) state.
2. The method as in claim 1, wherein the termination of the E-DCH in the CELL_FACH state further comprises: releasing E-DCH resources; stopping E-DCH reception and transmission procedures; and resetting a medium access control (MAC) entity.
3. The method as in claim 2, wherein the physical layer indicates to the MAC layer that the RL failure has occurred and the MAC layer stops sending data to the physical layer.
4. The method as in claim 1, further comprising after terminating the E-DCH transmission in the CELL_FACH state: waiting a predefined amount of time; starting a backoff timer; and waiting for the backoff timer to expire prior to initiating another RACH access.
5. The method as in claim 4, further comprising the WTRU performing a cell reselection even if the timer has not expired.
6. The method as in claim 4, further comprising the WTRU terminating the back off timer and perform a cell reselection procedure when a cell reselection criterion is met.
7. A wireless transmit receive unit (WTRU), the WTRU comprising: a processor configured to monitor a quality of a downlink fractional dedicated physical channel (F-DPCH), determine that the quality of the downlink F-DPCH is below a predefined threshold, Q, for N consecutive frames, declare an occurrence of an RL failure, and terminate a transmission via an enhanced dedicated channel (E-DCH) in a cell forward access channel (CELL_FACH) state, wherein N is a predefined number of consecutive frames.
8. The WTRU as in claim 7, wherein the termination of the E-DCH in the CELL_FACH state further comprises: release E-DCH resources; stopping E-DCH reception and transmission procedures; and reset a medium access control (MAC) entity.
9. The WTRU as in claim 8, wherein a physical layer indicates to the MAC layer that the RL failure has occurred and the MAC layer stops sending data to the physical layer
10. The WTRU as in claim 7, further comprising after terminating the E-DCH transmission in the CELLJB1ACH state: waiting a predefined amount of time; starting a backoff timer; and waiting for the backoff timer to expire prior to initiating another RACH access
11. The method as in claim 10, further comprising the WTRU performing a cell reselection even if the timer has not expired
12. The WTRU as in claim 10, further comprising the WTRU terminating the backoff timer and perform a cell reselection procedure when the cell reselection criterion is met
13. The WTRU as in claim 7, further comprising: the WTRU configured to monitor a quality of a downlink dedicated physical control channel (DPCCH)
14. The WTRU as in claim 7, further comprising: the WTRU configured to reselect a new cell and to release E-DCH resources if a post verification procedure fails and if a cell reselection criterion is met
15. The WTRU as in claim 14, wherein if the cell reselection criterion is not met then, the WTRU does not attempt to complete a transmission and is further configured to release the E-DCH resources; and the WTRU is configured to wait for a predefined timer to expire before applying a backoff procedure and attempting an uplink random access
16. A wireless transmit receive unit (WTRU), the WTRU comprising: a processor configured to monitor a quality of a downlink fractional dedicated physical channel (F-DPCH), determine that the quality of the downlink F-DPCH is below a predefined threshold, Q, for N consecutive frames, detect a post verification failure, and terminate a transmission via an enhanced dedicated channel (E-DCH) in a cell forward access channel (CELL-FACH) state, wherein N is a predefined number of consecutive frames
17. The WTRU as in claim 16, wherein if the post verification fails, the WTRU is configured to start a backoff timer and attempt an uplink random access once the timer has expired
18. The WTRU as in claim 16, wherein if a cell reselection criteria is met, then the WTRU performs cell reselection; and the WTRU is configured to transmit even though the backoff timer may not have expired
19. The WTRU as in claim 16, wherein if the post verification fails, then E-DCH resources are released.']
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.