Method and base station for selecting a transport format

Patent metadata

Field	Value
Publication number	US-9961690-B2
Application number	US-201514761198-A
Country	US
Kind code	B2
Filing date	Jun 26, 2015
Priority date	Jun 26, 2015
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A method in a base station for selecting a transport format is provided. The base station allocates resources to a User Equipment, UE.
When a first criterion is fulfilled for the allocated resources, the base station estimates Signal-to-Interference-plus-Noise Ratio, SINR, by using a first gain offset. The first gain offset relates to a resource allocation according to the first criterion.
When a second criterion is fulfilled for the allocated resources, the base station estimates SINR by using a second gain offset. The second gain offset relates to a resource allocation according to the second criterion.
The base station then selects a transport format for the allocated resources based on the estimated SINR.

First claim

The invention claimed is:

1. A method performed by a base station for selecting a transport format, the method comprising:
allocating resources to a User Equipment, UE,
when a first criterion is fulfilled for the allocated resources where the first criterion relates to the allocated resources being contiguous, estimating Signal-to-Interference-plus-Noise Ratio, SINR, by using a first gain offset, which first gain offset relates to contiguous resource allocation,
when a second criterion is fulfilled for the allocated resources where the second criterion relates to the allocated resources being non-contiguous, estimating SINR by using a second gain offset, which second gain offset relates to non-contiguous resource allocation, and
selecting a transport format for the allocated resources based on the estimated SINR.

2. The method according to claim 1 , further comprising:
deciding which one out of a multiple criterion the allocated resources fulfills, and wherein the multiple criterion comprises the first criterion and the second criterion.

3. The method according claim 2 , wherein the multiple criterion further comprises one or more third criterion, and wherein the method further comprises:
when a specific third criteria out of the one or more third criterion is fulfilled for the allocated resources, estimating SINR by using a specific third gain offset, which specific third gain offset relates to a resource allocation according to the specific third criterion.

4. The method according to claim 3 , further comprising:
receiving a coded transport block from the UE, which coded transport block relates to the allocated resources,
when the specific third criteria out of the one or more third criterion is fulfilled for the allocated resources, adjusting the specific third gain offset based on whether or not the coded transport block is correctly decoded, and
re-estimating SINR by using the adjusted specific third gain offset.

5. The method according to claim 1 , further comprising:
receiving a coded transport block from the UE, which coded transport block relates to the allocated resources,
when the first criterion is fulfilled, adjusting the first gain offset based on whether or not the coded transport block is correctly decoded,
when the second criterion is fulfilled, adjusting the second gain offset, based on whether or not the coded transport block is correctly decoded.

6. The method according claim 5 , further comprising:
re-estimating SINR by using the adjusted first gain offset, or
re-estimating SINR by using the adjusted second gain offset.

7. The method according to claim 1 , wherein:
the resource allocation is associated with a parameter, which parameter relates to any one or more out of: the amount of allocated resources and a distance of clusters in the allocated resources, and wherein
the second criterion is fulfilled when the value of the parameter exceeds a threshold.

8. A base station for selecting a transport format, the base station being configured to:
allocate resources to a User Equipment, UE,
when a first criterion is fulfilled for the allocated resources where the first criterion relates to the allocated resources being contiguous, estimate Signal-to-Interference-plus-Noise Ratio, SINR, by using a first gain offset, which first gain offset relates to contiguous resource allocation,
when a second criterion is fulfilled for the allocated resources where the second criterion relates to the allocated resources being non-contiguous, estimate SINR by using a second gain offset, which second gain offset relates to non-contiguous resource allocation, and
select a transport format for the allocated resources based on the estimated SINR.

9. The base station according to claim 8 , further being configured to:
decide which one out of a multiple criterion the allocated resources fulfills, and wherein the multiple criterion comprises the first criterion and the second criterion.

10. The base station according claim 9 , wherein the multiple criterion further comprises one or more third criterion, and wherein the base station further is configured to:
when a specific third criteria out of the one or more third criterion is fulfilled for the allocated resources, estimate SINR by using a specific third gain offset, which specific third gain offset relates to a resource allocation according to the specific third criterion.

11. The base station according to claim 10 , further being configured to:
receive a coded transport block from the UE, which coded transport block relates to the allocated resources,
when the specific third criteria out of the one or more third criterion is fulfilled for the allocated resources, adjust the specific third gain offset based on whether or not the coded transport block is correctly decoded, and
re-estimate SINR by using the adjusted specific third gain offset.

12. The base station according to claim 8 , further being configured to:
receive a coded transport block from the UE, which coded transport block relates to the allocated resources,
when the first criterion is fulfilled, adjust the first gain offset based on whether or not the coded transport block is correctly decoded,
when the second criterion is fulfilled, adjust the second gain offset, based on whether or not the coded transport block is correctly decoded.

13. The base station according claim 12 , further being configured to:
re-estimate SINR by using the adjusted first gain offset, or
re-estimate SINR by using the adjusted second gain offset.

14. The base station according to claim 8 , wherein:
the resource allocation is associated with a parameter, which parameter relates to any one or more out of: the amount of allocated resources and a distance of clusters in the allocated resources, and wherein
the second criterion is fulfilled when the value of the parameter exceeds a threshold.

15. A method performed by a base station for selecting a transport format, the method comprising:
allocating resources to a User Equipment (UE);
when a first criterion is fulfilled for the allocated resources, estimating Signal-to-Interference-plus-Noise Ratio (SINR) by using a first gain offset, which first gain offset relates to a resource allocation according to the first criterion;
when a second criterion is fulfilled for the allocated resources, estimating SINR by using a second gain offset, which second gain offset relates to a resource allocation according to the second criterion;
when a specific third criteria is fulfilled for the allocated resources, estimating SINR by using a specific third gain offset, which specific third gain offset relates to a resource allocation according to the specific third criterion; and
selecting a transport format for the allocated resources based on the estimated SINR.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Wang Liping
• Sun Ying
• Yang Jinghong

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/541 Primary

  using the level of interference · CPC title

• H04W72/082 Primary

  Electricity · mapped topic

• H04L5/006

  Quality of the received signal, e.g. BER, SNR, water filling · CPC title

• H04W72/0413

  Electricity · mapped topic