METHODS AND ARRANGEMENTS FOR HANDLING UNRELIABLE SCHEDULING GRANTS IN A TELECOMMUNICATION NETWORK

• US 20120120899A1
• Filed: 01/24/2012
• Published: 05/17/2012
• Est. Priority Date: 02/07/2005
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Kazmi, Muhammad, Muller, Walter, Andersson, Rutger, Gerstenberger, Dirk, Bergstrom, Joakim, Parkvall, Stefan
• Granted Patent: US 9,295,079 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 7/264 for data rate control
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention relates to methods and arrangements for handling unreliable scheduling grants in a WCDMA-communication system. A user equipment detects that a received scheduling grant is unreliable and adjust its serving grant based on that information. The user equipment is also able to report continuously received unreliable grants as an event to the network, allowing the network to adapt its operation to reduce the unreliable grants.

Claims

1. A method for handling unreliable scheduling grants in a telecommunication network, comprising the steps of:

receiving a report of an event on continuously detected received unreliable scheduling grants during a given period of time; and

,

initiating radio resource managing procedures for the downlink to decrease downlink interference in response to the received event report.

2. The method according to claim 1, wherein said initiating step comprises the step of increasing the power offset on the grant channel to decrease the downlink interference and enable more reliable grants.

3. The method according to claim 1, wherein said initiating step comprises the step of reducing the downlink load to decrease the downlink interference and enable more reliable grants.

4. The method according to claim 1, wherein said initiating step comprises the step of removing the unreliable radio link or replacing it with a reliable link.

5. A method for handling unreliably transmitted scheduling grants in a Node B of a telecommunication network, comprising the steps of:

detecting at least one unreliable transmitted scheduling grant by comparing an expected bit rate and an actual received bit rate from the user equipment; and

detecting an unreliable transmitted scheduling grant if said comparison falls within a predetermined bit rate interval; and

,

requesting a radio network controller to review the power offsets of the downlink scheduling grant channels based on said at least one grant.

6. The method according to claim 5, further comprising the step of increasing the power offset of the scheduling channels based at least on the requested review.

7. The method according to claim 5, further comprising the step of reducing the downlink load based on the requested review.

8. The method according to claim 5, further comprising the step of detecting a plurality of unreliable transmitted scheduling grants.

9. The method according to claim 5, further comprising the step of detecting one unreliable transmitted scheduling grant.

10. An arrangement for handling unreliable scheduling grants in a network unit of a telecommunication network, comprising:

means for receiving an event on continuously detected received unreliable scheduling grants during a given period of time; and

,

means for initiating radio resource managing procedures for the downlink in response to the received event.

11. The arrangement according to claim 10, wherein said network unit is a radio network controller.

12. A node in a telecommunication network, comprising:

means for detecting at least one unreliable transmitted scheduling grant; and

,

means for requesting a radio network controller to review the power offsets of the downlink scheduling grant channels based on said at least one unreliable transmitted grant.

13. The node according to claim 12, further comprising means for increasing the power offset of the scheduling channels based at least on the requested review.

14. The node according to claim 12, further comprising means for reducing the downlink load based on the requested review.

15. The node according to claim 12, wherein said node is a Node B.