Method and system for preventing high speed downlink packet access transmissions loss

• US 20060251014A1
• Filed: 08/12/2005
• Published: 11/09/2006
• Est. Priority Date: 05/06/2005
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Castor, Douglas R., McNally, John Mathisen, Sternberg, Gregory S.
• Granted Patent: US 7,813,312 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/54 based on quality criteria

Abstract

The present invention is related to a method and system for preventing high speed downlink packet access (HSDPA) transmission loss due to transmission gap in compressed mode in a wireless transmit/receive unit (WTRU). In accordance with one embodiment, a Node-B receives a compressed mode transmission gap schedule of a WTRU, identifies HSDPA transmission time intervals (TTIs) that are affected by the WTRU compressed mode transmission gap schedule and schedules the HSDPA transmissions not to overlap the WTRU compressed mode transmission gap schedule. In accordance with another embodiment, the Node-B may inform the HSDPA transmission schedule to a radio network controller (RNC) and the RNC coordinates the HSDPA transmission schedule and a compressed mode transmission gap schedule of the WTRU.

Claims

1. A method for preventing high speed downlink packet access (HSDPA) transmission loss in a wireless communication system, the method comprising:

a Node-B receiving a compressed mode transmission gap schedule of the wireless transmit/receive unit (WTRU);

the Node-B identifying HSDPA transmission time intervals (TTIs) that are affected by the transmission gap schedule; and

the Node-B scheduling the HSDPA transmissions not to overlap the WTRU compressed mode transmission gap schedule.

2. The method of claim 1 wherein the Node-B considers effects of the WTRU compressed mode transmission gap with at least one of high speed-downlink shared channel (HS-DSCH) TTI, the high speed-shared control channel (HS-SCCH) period, and the corresponding acknowledge/non-acknowledge (ACK/NACK) timeslots of the uplink high speed-dedicated physical control channel (HS-DPCCH).

3. A method for preventing high speed downlink packet access (HSDPA) transmission loss in a wireless communication system, the method comprising:

a Node-B scheduling HSDPA transmissions for a wireless transmit/receive unit (WTRU);

the Node-B providing the HSDPA transmission schedule to a radio network controller (RNC); and

the RNC coordinating the HSDPA transmission schedule and a compressed mode transmission gap schedule of the WTRU not to overlap each other.

4. The method of claim 3 wherein the RNC cancels overlapping transmission gap schedule after receiving the HSDPA transmission schedule.

5. A Node-B for preventing high speed downlink packet access (HSDPA) transmission loss in a wireless communication system, the Node-B comprising:

an HSDPA scheduler for scheduling HSDPA transmissions, the HSDPA scheduler being aware of wireless transmit/receive unit (WTRU) compressed mode transmission gap schedule and configured to identify HSDPA transmission time intervals (TTIs) that are affected by the WTRU compressed mode transmission gap schedule, whereby the HSDPA scheduler schedules HSDPA transmissions not to overlap the WTRU compressed mode transmission gap schedule.

6. The Node-B of claim 5 wherein the HSDPA scheduler considers effects of the WTRU compressed mode transmission gap with at least one of high speed-downlink shared channel (HS-DSCH) TTI, the high speed-shared control channel (HS-SCCH) period, and the corresponding acknowledge/non-acknowledge (ACK/NACK) timeslots of the uplink high speed-dedicated physical control channel (HS-DPCCH).

7. A Node-B for preventing high speed downlink packet access (HSDPA) transmission loss in a wireless communication system, the Node-B comprising:

an HSDPA scheduler for scheduling HSDPA transmissions, the HSDPA scheduler configured to send a HSDPA schedule to a radio network controller, whereby the HSDPA schedule is utilized in scheduling transmission gaps such that the HSDPA transmissions do not overlap the WTRU compressed mode transmission gap schedule.

8. A system for preventing high speed downlink packet access (HSDPA) transmission loss, comprising:

a wireless transmit/receive unit (WTRU), the WTRU configured to implement compressed mode transmission gap;

a Node-B comprising;

an HSDPA scheduler for scheduling HSDPA transmissions and configures to report the HSDPA schedule to a radio network controller (RNC); and

the RNC comprising a means for controlling a schedule for WTRU compressed mode transmission gaps in accordance with the reported HSDPA schedule, whereby the WTRU compressed mode transmission gap is scheduled not to overlap the HSDPA transmissions.

9. The system of claim 8 wherein the RNC cancels overlapping transmission gap schedule after receiving the HSDPA transmission schedule.