Method and apparatus to allocate radio resources for transmitting a message part in an enhanced RACH

• US 9,113,477 B2
• Filed: 09/26/2008
• Issued: 08/18/2015
• Est. Priority Date: 09/27/2007
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Pelletier, Benoit, Zeira, Eldad M., Marinier, Paul, Cave, Christopher R., DiGirolamo, Rocco
• Primary Examiner(s): Patel, Kumar
• Assistant Examiner(s): WOO, KUO-KONG
• Application Number:
  US12/238,546
• Publication Number:
  US 20090088175A1
• Time in Patent Office: 2,517 Days
• Field of Search: 370/331, 370/329, 370/312, 455/417, 455/452.1
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1877 for semi-reliable protocols, e.g. for less sensitive applications like streaming video buffer level management for video bitstream control arrangements H04N21/44004
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access

Abstract

A method and apparatus for allocating resources to a wireless transmit receive unit (WTRU) includes the WTRU transmitting a signature sequence to a Node B, receiving an acknowledge signal from the Node B, and determining a default resource index. The resource index is associated with enhanced dedicated channel (E-DCH) parameters.

Claims

1. A method, implemented by a wireless transmit/receive unit (WTRU), for allocating resources in cell forward access channel (CELL_FACH) state and IDLE mode, the method comprising:

receiving a system information block (SIB) including a set of enhanced dedicated channel (E-DCH) access parameters;

transmitting a random access channel (RACH) preamble using a signature sequence;

receiving an acquisition indicator in response to the RACH preamble;

determining an E-DCH resource based on a signature sequence index associated with the signature sequence; and

configuring the WTRU for E-DCH transmission using the E-DCH resource.

2. The method of claim 1 wherein the acquisition indicator is received on an acquisition indicator channel (AICH).

3. The method of claim 1 wherein the SIB is received prior to transmitting the RACH preamble.

4. The method of claim 1, further comprising:

transmitting a RACH message via an E-DCH.

5. The method of claim 1 wherein the set of E-DCH access parameters includes an E-DCH hybrid automatic repeat request (HARQ) indicator channel (E-HICH) signature.

6. The method of claim 1 wherein the set of E-DCH access parameters includes an E-DCH absolute grant channel (E-AGCH) signature.

7. The method of claim 1 wherein the SIB is received via a broadcast channel.

8. A wireless transmit/receive unit (WTRU) for allocating resources in cell forward access channel (CELL_FACH) state and IDLE mode, the WTRU comprising:

a receiver configured for receive a system information block (SIB) including a set of enhanced dedicated channel (E-DCH) access parameters;

a transmitter configured to transmit a random access channel (RACH) preamble using a signature sequence;

the receiver further configured to receive an acquisition indicator in response to the RACH preamble; and

a controller configured to determine an E-DCH resource based on a signature sequence index associated with the signature sequence;

the controller further configured to configure the WTRU for E-DCH transmission using the E-DCH resource.

9. The WTRU of claim 8 wherein the acquisition indicator is received on an acquisition indicator channel (AICH).

10. The WTRU of claim 8 wherein the SIB is received prior to transmitting the RACH preamble.

11. The WTRU of claim 8 wherein the transmitter is further configured to transmit a RACH message via an E-DCH.

12. The WTRU of claim 8 wherein the set of E-DCH access parameters includes an E-DCH hybrid automatic repeat request (HARQ) indicator channel (E-HICH) signature.

13. The WTRU of claim 8 wherein the set of E-DCH access parameters includes an E-DCH absolute grant channel (E-AGCH) signature.

14. The WTRU of claim 8 wherein the SIB is received via a broadcast channel.

15. A method, implemented by a wireless transmit/receive unit (WTRU), for allocating resources in cell forward access channel (CELL_FACH) state and IDLE mode, the method comprising:

receiving a system information block (SIB) including a set of enhanced dedicated channel (E-DCH) resource configurations;

transmitting a random access channel (RACH) preamble using a signature sequence;

receiving an acknowledgment in response to the RACH preamble;

determining an E-DCH resource index in response to the acknowledgment;

determining an E-DCH resource configuration using the E-DCH resource index from the set of E-DCH resource configurations; and

configuring the WTRU for E-DCH transmission using the E-DCH resource configuration.