Handling cell reselections and state transitions for high-speed downlink packet access

Patent metadata

Field	Value
Publication number	US-10129797-B2
Application number	US-201615354213-A
Country	US
Kind code	B2
Filing date	Nov 17, 2016
Priority date	Apr 30, 2007
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A wireless transmit receive unit (WTRU) is configured to operate in an high speed data packet access (HSDPA) mode in a cell and/or state and to clear HSDPA resources when moving out of the cell and/or state. The WTRU is configured to clear HSDPA resources when conditions to perform high speed downlink shared channel reception are not met.

First claim

What is claimed is:

1. A method implemented by a wireless transmit receive unit (WTRU), the method comprising:
receiving, by the WTRU, broadcast information;
checking, using the broadcast information, that a cell serving the WTRU supports high speed reception in a paging state on condition that the WTRU has transitioned to the paging state;
setting a high speed reception variable associated with at least the paging state to a first value on condition that the WTRU or the cell serving the WTRU does not support the high speed reception;
setting the high speed reception variable associated with at least the paging state to a second value on condition that the WTRU and the cell serving the WTRU support the high speed reception; and
releasing high speed resources on condition that the high speed reception variable is set to the first value.

2. The method of claim 1 , further comprising determining whether the WTRU has transitioned to any of: a Cell_PCH state or a URA_PCH state, as the paging state.

3. The method of claim 1 , wherein the checking that the paging state supports the high speed reception includes decoding an Information Element (IE) in the broadcast information of a broadcast from the cell to determine a high speed reception status.

4. The method of claim 3 , wherein the decoding of the IE in the broadcast information includes decoding a High Speed-Downlink Shared Channel (HS-DSCH) paging system information IE.

5. The method of claim 1 , wherein the releasing of the high speed resources is further conditioned on the high speed resources being previously set.

6. The method of claim 1 , further comprising:
receiving a communication over a High Speed-Downlink Shared Channel (HS-DSCH) on condition that the cell serving the WTRU supports the high speed reception;
receiving the communication over a non-high speed channel on condition that the cell serving the WTRU does not support the high speed reception; and
decoding the received communication.

7. The method of claim 1 , further comprising:
on condition that the WTRU is in or transitions into a non-paging state, setting any of: a HS_DSCH_RECEPTION_OF_CCCH_ENABLED variable or a HS_DSCH_RECEPTION_Cell_FACH_STATE variable, the HS_DSCH_RECEPTION_OF_CCCH_ENABLED variable and the HS_DSCH_RECEPTION_Cell_FACH_STATE variable being different variables than the high speed reception variable.

8. A wireless transmit receive unit (WTRU) configured to manage a transition to a paging state, comprising:
a transmit/receive unit configured to receive broadcast information;
a processor configured to:
check, using the broadcast information, that a cell serving the WTRU supports high speed reception in the paging state on condition that the WTRU has transitioned to the paging state;
set a high speed reception variable associated with at least the paging state to a first value on condition that the WTRU or the cell serving the WTRU does not support the high speed reception;
setting the high speed reception variable associated with at least the paging state to a second value on condition that the WTRU and the cell serving the WTRU support the high speed reception; and
release high speed resources on condition that the high speed reception variable is set to the first value.

9. The WTRU of claim 8 , wherein the processor is configured to determine whether the WTRU has transitioned to any of: a Cell_PCH state or a URA_PCH state, as the paging state.

10. The WTRU of claim 8 , wherein the processor is configured to decode an Information Element (IE) in the broadcast information of a broadcast from the cell to determine a high speed reception status.

11. The WTRU of claim 10 , wherein the processor is configured to decode a High Speed-Downlink Shared Channel (HS-DSCH) paging system information IE.

12. The WTRU of claim 8 , wherein the processor is configured to release the high speed resources further conditioned on the high speed resources being previously set.

13. The WTRU of claim 8 , wherein:
the transmit/receive unit is configured to:
receive a communication over a High Speed-Downlink Shared Channel (HS-DSCH) on condition that the cell serving the WTRU supports the high speed reception, and
receive the communication over a non-high speed channel on condition that the cell serving the WTRU does not support the high speed reception; and

the processor is configured to decode the received communication.

14. The WTRU of claim 8 , wherein the processor is configured to:
set any of: a HS_DSCH_RECEPTION_OF_CCCH_ENABLED variable or a HS_DSCH_RECEPTION_Cell_FACH_STATE variable, on condition that the WTRU is in or transitions into a non-paging state, the HS_DSCH_RECEPTION_OF_CCCH_ENABLED variable and the HS_DSCH_RECEPTION_Cell_FACH_STATE variable being different variables than the high speed reception variable.

Assignees

• Interdigital Tech Corp

Inventors

• Di Girolamo Rocco
• Marinier Paul
• Pani Diana

Classifications

• H04W76/27

  Transitions between radio resource control [RRC] states · CPC title

• H04W76/18 Primary

  Management of setup rejection or failure · CPC title

• H04W52/0216

  using a pre-established activity schedule, e.g. traffic indication frame · CPC title

• H04W36/0061

  of neighbour cell information · CPC title

• H04W76/30

  Connection release · CPC title