Method of and apparatus for reducing power consumption in a mobile telephony system

• US 20080311947A1
• Filed: 06/13/2007
• Published: 12/18/2008
• Est. Priority Date: 06/13/2007
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: Analog Devices, Inc.
• Inventors: Pedersen, Carsten, Soerensen, Joern, Griem, Carsten
• Granted Patent: US 7,957,758 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04L 1/0053 specially adapted for power saving
• CPC Class Codes: H04L 1/0059 Convolutional codes
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method of decoding data comprising a plurality of data-bursts, comprising the steps of:

• • i) receiving a first one of the data-bursts,
  • ii) associating hypothesis data with the or each received data-bursts;
  • iii) attempting to decode the data; and
  • iv) if the decode is successful to power down the receiver, and if the decode is unsuccessful receiving a further one of the data-bursts and repeating steps ii) to iv), until all of the data has been received.

Claims

1. A method of decoding data comprising a plurality of data-bursts, comprising the steps of:

i) receiving a first one of the data-bursts,

ii) associating hypothesis data with the or each received data-bursts;

iii) attempting to decode the data; and

iv) if the decode is successful to power down the receiver, and if the decode is unsuccessful receiving a further one of the data-bursts and repeating steps ii) to iv), until all of the data has been received.

2. A method as claimed in claim 1, wherein the decoding is performed by a convolutional decoder that accepts metadata representative of an estimate of the validity of the data-burst and hypothesis data, and wherein the metadata associated with the hypothesis data is set to a low validity value.

3. A method as claimed in claim 1, in which the hypothesis data is generated from preceding data which had been decoded.

4. A method as claimed in claim 3, in which the hypothesis is stored in memory.

5. A method as claimed in claim 1, in which the data to be decoded is a paging block within a radio telecommunications system.

6. A method as claimed in claim 5, in which the paging block comprises first to fourth data-bursts, and the hypothesis data only corresponds to one data-bursts worth of data.

7. A method as claimed in claim 6, in which the hypothesis data corresponds to the fourth data-burst.

8. A method as claimed in claim 5, in which the hypothesis data corresponds to two data-bursts worth of data.

9. A method as claimed in claim 5, in which the hypothesis data corresponds to three data-bursts worth of data.

10. A method as claimed in claim 1, in which hypothesis data is always associated with the first data-burst irrespective of a degree of correlation between the received first one of the data-bursts and hypothesis data corresponding to that data-burst.

11. A telecommunications receiver adapted to decode data transmitted as a plurality of data-bursts, the receiver arranged to:

i) receive a first one of the data-bursts;

ii) associate hypothesis data with the or each received data-burst;

iii) attempt to decode the data; and

iv) if the decode is successful to power down the receiver, otherwise to receive a further data-burst and to repeat the attempt to decode the data.

12. A telecommunications receiver as claimed in claim 11, in which the hypothesis data is weighted to have a low validity.

13. A receiver as claim 11, further including a hypothesis generator for generating hypothesis based on previously decoded data.

14. A GSM terminal including a receiver as claimed in claim 11.