Paging over a high-speed downlink shared channel

A wireless transmit/receive unit, WTRU, configured for high speed downlink packet access (HSDPA) wireless communications, the WTRU configured at least in part to:

• when the WTRU is operating in CELL PCH or URA PCH state:
• receive, from the 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 derived from the PICH information;
• monitor for a paging indicator over a PICH using the selected PICH information;
• monitor for a message on a high speed physical downlink shared channel (HS-PDSCH) using a common high speed downlink shared channel (HS-DSCH) radio network transaction identity (H-RNTI);
• and
• return to the sleep mode, if no message is detected over the HS-PDSCH.

A method for a wireless transmit/receive unit, WTRU, to facilitate paging in high speed downlink packet access (HSDPA) wireless communications, the method comprising:

• when the WTRU is in one of a CELL PCH and 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 derived from the PICH information;
• monitoring for a 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 a high speed shared channel using the received H-RNTI;
• and
• returning to the sleep mode, if no H-RNTI is received.

A wireless transmit/receive unit, WTRU, configured for high speed downlink packet access (HSDPA) wireless communications, the WTRU configured at least in part to:

• when the WTRU is in one of a CELL PCH and URA PCH state:
• receive, from the 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 derived from the PICH information;
• monitor for a 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 a high speed shared channel using the received H-RNTI;
• and
• return to the sleep mode, if no H-RNTI is received.