Paging over a high-speed downlink shared channel

Patent metadata

Field	Value
Publication number	US-9264990-B2
Application number	US-201414172318-A
Country	US
Kind code	B2
Filing date	Feb 4, 2014
Priority date	Feb 5, 2007
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

An apparatus and methods are provided for paging in a HSDPA connected mode CELL_PCH or URA_PCH state. Preferably, a WTRU is configured to select various PICH information that is broadcast by a base station. The WTRU is preferably configured to receive paging messages, based on the selected PICH information. In one embodiment, a preferred WTRU is configured to receive paging messages, based on a PICH, a HS-SCCH, and a HS-PDSCH. In another embodiment, a preferred WTRU is configured to receive paging messages, based on a PICH and a HS-PDSCH. In both embodiments, a time delay parameter is preferably used so that the WTRU may listen for either the HS-SCCH or HS-PDSCH for a period of time and return to a sleep mode if no paging message is received.

First claim

What is claimed is:

1. A method for a wireless transmit/receive unit (WTRU) to facilitate paging in high speed downlink packet access (HSDPA) wireless communications, the method comprising:
receiving, from a broadcast, system information indicating a delay between reception of a paging indicator and reception of a message;
when the WTRU is operating in a cell paging channel (CELL_PCH) state or a UTRAN Registration Area (URA) paging channel (URA_PCH) state:
receiving, from a base station, HSDPA associated paging indicator channel (PICH) information elements comprising PICH information,
compiling a list of candidate PICHs for HSDPA after receiving the information elements,
determining a value k corresponding to a number of candidates,
calculating a selection index equal to:
U_RNTI mod k,
where U_RNTI is a universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) radio network transaction identity (U-RNTI) of the WTRU, and
selecting a PICH information from the list of candidate PICHs based on the selection index;
awakening from a sleep mode during paging occasions;
monitoring for the paging indicator over a PICH using the selected PICH information;
monitoring for the message on a high speed physical downlink shared channel (HS-PDSCH) based on the received system information, wherein a maximum delay between the receptions of the paging indicator and the message is pre-determined; and
returning to the sleep mode, if no message is received over the HS-PDSCH.

2. The method of claim 1 , wherein the monitoring for the message comprises: monitoring, after waiting the delay, for reception of the message.

3. A wireless transmit/receive unit (WTRU) configured for high speed downlink packet access (HSDPA) wireless communications, the WTRU comprising a transmit/receive unit and a processor configured to:
receive, from a broadcast, system information indicating a delay between reception of a paging indicator and reception of a message;
when the WTRU is operating in a cell paging channel (CELL_PCH) state or a UTRAN Registration Area (URA) paging channel (URA_PCH) state:
receive, from a base station, HSDPA associated paging indicator channel (PICH) information elements comprising PICH information,
compile a list of candidate PICHs for HSDPA using the information elements,
determine a value k corresponding to a number of candidates,
calculate a selection index equal to:
U_RNTI mod k,
where U_RNTI is a universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) radio network transaction identity (U-RNTI) of the WTRU, and
select a PICH information from the list of candidate PICHs based on the selection index;
awaken from a sleep mode during paging occasions;
monitor for the paging indicator over a PICH using the selected PICH information;
monitor for the message on a high speed physical downlink shared channel (HS-PDSCH) based on the received system information, wherein a maximum delay between the receptions of the paging indicator and the message is pre-determined; and
return to the sleep mode, if no message is received over the HS-PDSCH.

4. The WTRU of claim 3 , wherein the WTRU is configured to:
receive a common high speed downlink shared channel (HS-DSCH) radio network transaction identity (H-RNTI); and
receive the message on the HS-PDSCH using the received common H-RNTI.

5. The WTRU of claim 4 , wherein the WTRU is configured to:
monitor, after waiting the delay, for the reception of the message.

6. A method for a wireless transmit/receive unit (WTRU) to facilitate paging in high speed downlink packet access (HSDPA) wireless communications, the method comprising:
receiving, from a broadcast, system information indicating a delay between reception of a paging indicator and reception using a high speed shared channel;
when the WTRU is in one of a cell paging channel (CELL_PCH) state or a UTRAN Registration Area (URA) paging channel (URA_PCH) state:
receiving, from a base station, HSDPA associated paging indicator channel (PICH) information elements comprising PICH information,
compiling a list of candidate PICHs for HSDPA after receiving the information elements,
determining a value k corresponding to a number of candidates;
calculating a selection index equal to:
U_RNTI mod k,
where U_RNTI is a universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) radio network transaction identity (U-RNTI) of the WTRU, and
selecting a PICH information from the list of candidate PICHs based on the selection index;
awakening from a sleep mode during paging occasions;
monitoring for the paging indicator over a PICH using the selected PICH information;
monitoring for a high speed downlink shared channel (HS-DSCH) radio network transaction identity (H-RNTI);
monitoring the high speed shared channel using the H-RNTI on condition that the H-RNTI is received based on the received system information, wherein a maximum delay between the reception of the paging indicator and the reception using the high speed shared channel is pre-determined; and
returning to the sleep mode, if no H-RNTI is received or the maximum delay has expired.

7. The method of claim 6 , further comprising:
receiving the H-RNTI; and
receiving a high speed physical downlink shared channel (HS-PDSCH) based on the received H-RNTI.

8. A wireless transmit/receive unit (WTRU) configured for high speed downlink packet access (HSDPA) wireless communications, the WTRU comprising:
a transmit/receive unit and a processor configured to:
receive, from a broadcast, system information indicating a delay between reception of a paging indicator and reception using a high speed shared channel;
when the WTRU is in one of a cell paging channel (CELL_PCH) state or a UTRAN Registration Area (URA) paging channel (URA_PCH) state:
receive, from a base station, HSDPA associated paging indicator channel (PICH) information elements comprising PICH information,
compile a list of candidate PICHs for HSDPA after receiving the information elements,
determine a value k corresponding to a number of candidates,
calculate a selection index equal to:
U_RNTI mod k,
where U_RNTI is a universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) radio network transaction identity (U-RNTI) of the WTRU, and
select a PICH information from the list of candidate PICHs based on the selection index;
awaken from a sleep mode during paging occasions;
monitor for the paging indicator over a PICH using the selected PICH information;
monitor for a high speed downlink shared channel (HS-DSCH) radio network transaction identity (H-RNTI);
monitor the high speed shared channel using the H-RNTI on condition that the H-RNTI is received based on the received system information, wherein a maximum delay between the reception of the paging indicator and the reception using the high speed shared channel is pre-determined; and
return to the sleep mode, if no H-RNTI is received or the maximum delay has expired.

9. The WTRU of claim 8 , wherein the WTRU is configured to:
receive the H-RNTI; and
receive a high speed physical downlink shared channel (HS-PDSCH) based on the received H-RNTI.

Assignees

• Interdigital Tech Corp

Inventors

• Di Girolamo Rocco
• Pani Diana
• Cave Christopher
• Reznik Alexander

Classifications

• H04W68/025 Primary

  Indirect paging · CPC title

• H04W52/0216

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

• H04W52/0209 Primary

  in terminal devices · CPC title

• Y02D30/70

  in wireless communication networks · CPC title

• H04W72/1273

  of downlink data flows · CPC title