Abstract
A method and apparatus for cell update while in a Cell_FACH state are disclosed. After selecting a target cell system information is read from the target cell including high speed downlink shared channel (HS-DSCH) common system information. A radio network temporary identity (RNTI) received in a source cell is cleared and a variable HS_DSCH_RECEPTION is set to TRUE. An HS-DSCH medium access control (MAC-hs) entity is configured based on the HS-DSCH common system information. High speed downlink packet access (HSDPA) transmission is then received in the target cell. A CELL UPDATE message is sent to notify of a cell change. The HSDPA transmission may be received using a common H-RNTI broadcast in the system information a reserved H-RNTI as requested in a CELL UPDATE message or a temporary identity which is a subset of a U-RNTI. The MAC-hs entity may be reset.
Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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Declaration Date | Declaration Reference | Declaring Company | Specification Information | ||||||
3G | 19/09/2008 | ISLD-200901-001 | INTERDIGITAL INC | No | Family Member | ||||
3G | 22/12/2016 | ISLD-201706-014 | INTERDIGITAL INC |
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No | Family Member | |||
3G | 31/10/2019 | ISLD-201909-015 | INTERDIGITAL INC | No | Family Member | ||||
3G | 31/10/2019 | ISLD-201909-015 | INTERDIGITAL INC | Yes | Basis Patent |
Specification Information
Specification Information
Technologies
Family Information
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Technologies
Product
Use Cases
Services
Claim
1. A method for performing a cell update while in a Cell_FACH state, the method comprising:
detecting a cell update triggering event while receiving a high speed downlink packet access (HSDPA) transmission in a Cell_DCH state using a dedicated high speed downlink shared channel (HS-DSCH) radio network temporary identity (H-RNTI), the cell update triggering event comprising at least one of a radio link failure or a radio link control (RLC) unrecoverable error,
clearing a radio network temporary identity (RNTI) received in a source cell,
reading system information in a target cell, and
based on common HS-DSCH system information included in the system information, resetting a high speed downlink shared channel (HS-DSCH) medium access control (MAC-ehs) entity, and enabling HS-DSCH reception by setting an HS-DSCH reception variable to TRUE.
2. The method of claim 1, further comprising:
sending a CELL UPDATE message via a random access channel (RACH); and
setting up HSDPA communication based on the common HS-DSCH system information included in the system information.
3. The method of claim 1, further comprising:
setting up a random access channel (RACH) communication.
4. A wireless transmit/receive unit (WTRU) for performing a cell update while in a Cell_FACH state, the WTRU comprising:
a controller configured to:
detect a cell update triggering event while receiving a high speed downlink packet access (HSDPA) transmission in a Cell_DCH state using a dedicated high speed downlink shared channel (HS-DSCH) radio network temporary identity (H-RNTI), the cell update triggering event comprising at least one of a radio link failure or a radio link control (RLC) unrecoverable error,
clear a radio network temporary identity (RNTI) received in a source cell,
read system information in a target cell, and
based on common HS-DSCH system information included in the system information, reset a high speed downlink shared channel (HS-DSCH) medium access control (MAC-ehs) entity, and enable HS-DSCH reception by setting an HS-DSCH reception variable to TRUE.
5. The WTRU of claim 4, wherein the controller is further configured to:
send a CELL UPDATE message via a random access channel (RACH); and
set up HSDPA communication based on the common HS-DSCH system information included in the system information.
6. The WTRU of claim 4, wherein the controller is further configured to set up random access channel (RACH) communication.
7. A method for performing cell reselection while in a Cell_FACH state, the method comprising:
receiving information from a source cell that supports Cell FACH;
selecting a target cell for the cell reselection, wherein the target cell supports Cell_FACH or fails to support Cell_FACH;
reading system information broadcast from the target cell;
determining, based on the system information from the target cell, whether the target cell supports Cell_FACH; and
receiving information from the target cell based on whether the target cell supports Cell_FACH or fails to support Cell_FACH.
8. The method of claim 7, further comprising:
when the target cell supports Cell_FACH, performing at least one of the following:
clearing a high speed downlink shared channel (HS-DSCH) radio network temporary identity (H-RNTI) associated with the source cell,
clearing a cell radio network temporary identity (C-RNTI) associated with the source cell,
resetting an HS-DSCH medium access control (MAC-ehs) entity configured in the source cell,
configuring a MAC-ehs entity based on common HS-DSCH system information, or
receiving high speed downlink packet access (HSDPA) transmission in the target cell.
9. The method of claim 7, further comprising:
when the target cell fails to support Cell_FACH, performing at least one of the following:
clearing a radio network temporary identity (RNTI) received in the source cell;
resetting a high speed downlink shared channel (HS-DSCH) medium access control (MAC-ehs) entity configured in the source cell;
preventing HS-DSCH reception by setting an HS-DSCH reception variable to FALSE;
setting up secondary common control physical channel (S-CCPCH) and random access channel (RACH) communication; and
receiving downlink transmission on an S-CCPCH.
10. A wireless transmit/receive unit (WTRU) for performing cell update while in a Cell_FACH state, the WTRU comprising:
a controller configured to:
receive information from a source cell that supports Cell_FACH;
select a target cell for cell reselection, wherein the target cell supports Cell_FACH or fails to support Cell_FACH;
read system information broadcast from the target cell;
determine, based on the system information from the target cell, whether the target cell supports Cell_FACH; and
receive information from the target cell based on whether the target cell supports Cell_FACH or fails to support Cell_FACH.
11. The WTRU of claim 10, wherein the controller is further configured to:
when the target cell supports Cell_FACH, perform at least one of the following:
clear a high speed downlink shared channel (HS-DSCH) radio network temporary identity (H-RNTI) associated with the source cell,
clear a cell radio network temporary identity (C-RNTI) associated with the source cell,
reset an HS-DSCH medium access control (MAC-ehs) entity configured in the source cell,
configure a MAC-ehs entity based on common HS-DSCH system information, or receive high speed downlink packet access (HSDPA) transmission in the target cell.
12. The WTRU of claim 10, wherein the controller is further configured to:
when the target cell fails to support Cell_FACH, perform at least one of the following:
clear a radio network temporary identity (RNTI) received in the source cell;
reset a high speed downlink shared channel (HS-DSCH) medium access control (MAC-ehs) entity configured in the source cell;
prevent HS-DSCH reception by setting an HS-DSCH reception variable to FALSE;
set up secondary common control physical channel (S-CCPCH) and random access channel (RACH) communication; and
receive downlink transmission on an S-CCPCH.
Associated Portfolios
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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.