Transmitting a first and a second channel quality information between two network elements

Patent metadata

Field	Value
Publication number	US-10128977-B2
Application number	US-200913144577-A
Country	US
Kind code	B2
Filing date	Jan 15, 2009
Priority date	Jan 15, 2009
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

It is described a method for transmitting channel quality information between a second network element and a first network element. The method comprises includes (a) dividing a range of possible radio channel qualities between the two network elements into a fixed number of quality classes, (b) measuring the quality of a radio channel between the two network elements, (c) selecting one quality class out of the fixed number of quality classes based on the measured quality of the radio channel, (d) transmitting from the second network element to the first network element a first channel quality information being indicative for the selected quality class, and (e) transmitting from the second network element to the first network element a second channel quality information being indicative for the measured quality within the limits of the selected quality class. It is further described the first and the second network element, which in conjugation with each other are adapted to carry out the described method.

First claim

The invention claimed is:

1. A method comprising:
dividing a range of possible radio channel qualities between two network elements, a first network element and a second network element, of a radio telecommunication network into a fixed number (n) of quality classes, measuring quality of a radio channel between the two network elements, selecting one quality class out of the fixed number of quality classes based on the measured quality of the radio channel,
in a first transmission, transmitting from the second network element to the first network element a first channel quality information being indicative for the selected quality class, and
in a second transmission which is distinct from the first transmission, transmitting from the second network element to the first network element a second channel quality information being indicative for the measured quality within the limits of the selected quality class,
wherein the second channel quality information comprises a quality resolution within the limits of the selected quality class, and wherein the quality resolution depends on the selected quality class.

2. The method as set forth in claim 1 , wherein for a first measured radio channel quality, which is poorer than a second measured radio channel quality, the quality resolution is higher than the quality resolution for the second measured radio channel quality.

3. The method as set forth in claim 1 , further comprising:
transmitting from the second network element to the first network element at least one further second channel quality information being indicative for the measured quality within the limits of the selected quality class, wherein each further second channel quality information represents a different radio transmission resource.

4. The method as set forth in claim 3 , wherein the second channel quality information and the further second channel quality information are assigned to a predefined number of the best radio transmission resources between the two network elements.

5. The method as set forth in claim 1 , wherein dividing a range of possible radio channel qualities between the two network elements into a fixed number (n) of quality classes is performed by the first network element and wherein the method further comprises:
signaling a classification resulting from the performed division from the first network element to the second network element.

6. The method as set forth in claim 5 , wherein selecting one quality class out of the fixed number of quality classes based on the measured quality of the radio channel is performed by the second network element.

7. The method as set forth in claim 1 , wherein dividing a range of possible radio channel qualities between the two network elements into a fixed number (n) of quality classes is performed by the second network element and selecting one quality class out of the fixed number of quality classes based on the measured quality of the radio channel is performed by the second network element.

8. The method as set forth in claim 1 , further comprising
assigning a modulation mode quantization scheme to the selected quality class and/or
assigning a code rate to the to the selected quality class.

9. The method as set forth in claim 1 , wherein the first network element is a base station of the radio telecommunication network or the second network element is a user equipment of the radio telecommunication network or both the first network element is a base station of the radio telecommunication network and the second network element is a user equipment of the radio telecommunication network.

10. A computer program product comprising a non-transitory computer-readable memory storing instructions for execution by one or more processors, wherein the computer-readable memory includes instructions for performing the method as set forth in claim 1 .

11. A first network element comprising one or more processors and one or more memories including computer program code, the one or more memories and the computer program code being configured, with the one or more processors, to cause the first network element to perform at least the following:
receiving from a second network element in a first transmission a first channel quality information being indicative for a selected quality class, which has been selected from a fixed number (n) of quality classes based on a measured quality of a radio channel between the first and the second network elements, wherein a range of possible radio channel qualities between the first and the second network elements is divided into the fixed number (n) of quality classes, and receiving from the second network element in a second transmission which is distinct from the first transmission a second channel quality information being indicative for the measured quality within the limits of the selected quality class,
wherein the second channel quality information comprises a quality resolution within the limits of the selected quality class, and wherein the quality resolution depends on the selected quality class.

12. The first network element as set forth in claim 11 , wherein for a first measured radio channel quality, which is poorer than a second measured radio channel quality, the quality resolution is higher than the quality resolution for the second measured radio channel quality.

13. A second network element comprising one or more processors and one or more memories including computer program code, the one or more memories and the computer program code being configured, with the one or more processors, to cause the second network element to perform at least the following:
transmitting to a first network element in a first transmission a first channel quality information being indicative for a selected quality class, which has been selected from a fixed number (n) of quality classes based on a measured quality of a radio channel between the first and the second network elements, wherein a range of possible radio channel qualities between the first and the second network elements is divided into the fixed number (n) of quality classes,
and transmitting to the first network element in a second transmission which is distinct from the first transmission a second channel quality information being indicative for the measured quality within the limits of the selected quality class,
wherein the second channel quality information comprises a quality resolution within the limits of the selected quality class, and wherein the quality resolution depends on the selected quality class.

14. The second network element as set forth in claim 13 , wherein the second channel quality information comprises a quality resolution within the limits of the selected quality class, and wherein the quality resolution depends on the selected quality class.

15. The second network element as set forth in claim 14 , wherein for a first measured radio channel quality, which is poorer than a second measured radio channel quality, the quality resolution is higher than the quality resolution for the second measured radio channel quality.

Assignees

• Forck Andreas
• Haustein Thomas
• Jungnickel Volker
• Schellmann Malte
• Thiele Lars
• Wirth Thomas
• Fraunhofer Ges Forschung
• Nokia Siemens Networks Gmbh

Inventors

• Forck Andreas
• Haustein Thomas
• Jungnickel Volker
• Schellmann Malte
• Thiele Lars
• Wirth Thomas

Classifications

• H04L1/0023

  characterised by the signalling · CPC title

• H04W52/24

  using SIR [Signal to Interference Ratio] or other wireless path parameters · CPC title

• H04L1/0029

  Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling (power control H04W52/04) · CPC title

• H04L1/0026 Primary

  Transmission of channel quality indication · CPC title

• H04W28/24

  Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service] · CPC title