Paging over a high-speed downlink shared channel
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.
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, when the WTRU is in one of a Cell Paging Channel (CELL_PCH) and a universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) Registration Area Paging channel (URA_PCH) state, HSDPA associated paging indicator channel (PICH) information elements comprising PICH information;
compiling a list of candidate PICHs for HSDPA;
determining a value k corresponding to the 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;
selecting PICH information from the list of candidate PICHs based on the selection index;
receiving a paging indicator over a PICH using the selected PICH information;
receiving a high speed downlink shared channel (HS-DSCH) radio network transaction identifier (H-RNTI); and
receiving a high speed physical shared channel using the received H-RNTI.
2. The method of claim 1 , further comprising:
waiting for a period of time based on the PICH information;
wherein:
the receiving of the H-RNTI includes receiving the H-RNTI over a high speed shared control channel (HS-SCCH); and
the receiving of the high speed physical shared channel includes receiving a high speed physical downlink shared channel (HS-PDSCH) based on the received H-RNTI.
3. The method of claim 1 , further comprising:
awakening from a sleep mode during paging occasions; and
returning to a sleep mode, if no H-RNTI is received.
4. The method of claim 2 , wherein the period of time is based on a predetermined minimum time and a maximum time based on the received PICH information.
5. 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, when the WTRU is in one of a Cell Paging Channel (CELL_PCH) and a universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) Registration Area Paging channel (URA_PCH) state, HSDPA associated paging indicator channel (PICH) information elements comprising PICH information;
compiling a list of candidate PICHs for HSDPA;
determining a value k corresponding to the 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;
selecting PICH information from the list of candidate PICHs based on the selection index;
receiving a paging indicator over a PICH using the selected PICH information;
and
receiving 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 identifier (H-RNTI).
6. The method of claim 5 , further comprising:
awakening from a sleep mode during paging occasions; and
returning to a sleep mode, if no message is received over the HS-PDSCH.
7. The method of claim 5 ,further comprising waiting for a period of time based on the PICH information, wherein the period of time is based on a predetermined minimum time and a maximum time based on the received PICH information.
8. A wireless transmit/receive unit (WTRU) configured for high speed downlink packet access (HSDPA) wireless communications, the WTRU configured at least in part to:
receive, when the WTRU is in one of a Cell Paging Channel (CELL_PCH) and a universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) Registration Area Paging channel (URA_PCH) state, HSDPA associated paging indicator channel (PICH) information elements comprising PICH information;
compile a list of candidate PICHs for HSDPA;
determine a value k corresponding to the 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;
select PICH information from the list of candidate PICHs based on the selection index;
receive a paging indicator over a PICH using the selected PICH information;
receive a high speed downlink shared channel (HS-DSCH) radio network transaction identifier (H-RNTI); and
receive a high speed physical shared channel using the received H-RNTI.
9. The WTRU of claim 8 , wherein a receiver is configured to:
wait for a period of time based on the PICH information;
receive a HS-DSCH radio network transaction identifier, as the H-RNTI over a high speed shared control channel (HS-SCCH); and
receive the high speed physical shared channel based on the received H-RNTI.
10. The WTRU of claim 9 , wherein the WTRU is configured to
receive a high speed physical downlink shared channel (HS-PDSCH) based on the received H-RNTI in the CELL_PCH state.
11. The WTRU of claim 9 , wherein the WTRU is configured to
receive a high speed physical downlink shared channel (HS-PDSCH) based on the received H-RNTI in the URA_PCH state.
12. The WTRU of claim 8 , wherein a processor is configured to:
awaken from a sleep mode during paging occasions; and
return to a sleep mode, if no H-RNTI is received.
13. The WTRU of claim 9 , wherein the period of time is based on a predetermined minimum time and a maximum time based on the received PICH information.
14. A wireless transmit/receive unit (WTRU) configured for high speed downlink packet access (HSDPA) wireless communications, the WTRU configured at least in part to:
receive, when the WTRU is in one of a Cell Paging Channel (CELL PCH) and a universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) Registration Area Paging channel (URA PCH) state, HSDPA associated paging indicator channel (PICH) information elements comprising PICH information;
compile a list of candidate PICHs for HSDPA;
determine a value k corresponding to the 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;
select PICH information from the list of candidate PICHs based on the selection index;
receive a paging indicator over a PICH using the selected PICH information; and
receive 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 identifier (H-RNTI).
15. The WTRU of claim 14 , wherein the WTRU is configured to
receive a high speed physical downlink shared channel (HS-PDSCH) based on the received H-RNTI in the CELL_PCH state.
16. The WTRU of claim 14 , wherein the WTRU is configured to
receive a high speed physical downlink shared channel (HS-PDSCH) based on the received H-RNTI in the URA_PCH state.
17. The WTRU of claim 14 , wherein a processor is configured to
awaken from a sleep mode during paging occasions; and
return to a sleep mode, if no message is received over the HS-PDSCH.
18. The WTRU of claim 10 , wherein the period of time is based on a predetermined minimum time and a maximum time based on the received PICH information.