IP Library › Patent Application 17823078
Patent Application
App. No. 17/823,078

Enhanced Downlink Link Adaptation (DLLA) for Spectral Efficiency Maximization

Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US None
App. No.
17/823,078
Abstract

A method is disclosed for enhancing downlink link adaptation (DLLA) for spectral efficiency maximization, comprising: providing an outer loop link adaptation (OLLA) routine with a first path for a first transmission mode and a second path for a second transmission mode; modifying, upon receiving a retransmit message for a first transmission with the first transmission mode, a first offset coefficient; modifying, upon receiving a second retransmit message for a second transmission with the second transmission mode, a second offset coefficient; and calculating a modulation and coding scheme (MCS) offset for the first transmission based on the first offset coefficient.

Claims (15)

1 . A method for enhancing downlink link adaptation (DLLA) for spectral efficiency maximization, comprising:

providing an outer loop link adaptation (OLLA) routine with a first path for a first transmission mode and a second path for a second transmission mode;

modifying, upon receiving a retransmit message for a first transmission with the first transmission mode, a first offset coefficient;

modifying, upon receiving a second retransmit message for a second transmission with the second transmission mode, a second offset coefficient; and

calculating a modulation and coding scheme (MCS) offset for the first transmission based on the first offset coefficient.

2 . The method of claim 1 , wherein the retransmit message is an HARQ ACK/NACK and the first transmission mode is a transmit diversity (TD) transmission mode and the first offset coefficient is an offset TD .

3 . The method of claim 1 , wherein the second retransmit message is an HARQ ACK/NACK and the second transmission mode is a spatial multiplexing (SM) transmission mode and the second offset coefficient is an offset SM .

4 . The method of claim 1 , further comprising calculating a modulation and coding scheme (MCS) offset based on an ACK/NACK and a number of code words that were sent.

5 . The method of claim 1 , wherein the OLLA routine is for a 4G LTE radio access technology or a 5G radio access technology.

6 . The method of claim 1 , wherein a transmission mode is reported by a user equipment (UE).

7 . The method of claim 1 , further comprising providing the MCS offset to an inner loop link adaptation (ILLA) routine.

8 . The method of claim 1 , further comprising calculating a second modulation and coding scheme (MCS) offset for the second transmission based on the second offset coefficient.

9 . The method of claim 1 , further comprising reporting a preferred transmission mode to a scheduler.

10 . The method of claim 1 , further comprising subtracting a specific stepdown quantity from the MCS offset if a NACK is received.

11 . The method of claim 1 , further comprising adding a specific step up quantity from the MCS offset if an ACK is received.