Mobile Station Decoding After LBT Resource Reallocation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In unlicensed bands, the difference between the resource allocated for downlink data transmission before and after carrier sense (LBT) can lead to incorrect decoding of data by mobile stations due to insufficient information being provided about the actual resource allocation after LBT is completed.

Innovation Solution

A method where a base station provides both the initial resource size configured for data (first information) and the actual resource size allocated after LBT (second information) to a mobile station, allowing the mobile station to correctly decode the data by adjusting the number of bits or symbols based on these indications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the base station allocates resources for downlink data transmission before carrier sense (LBT), then the initial resource size can be configured, but the actual resource allocation after LBT may differ leading to incorrect decoding by mobile stations

Engineering Contradiction:

Improvedata decoding accuracyVSAvoidresource allocation information

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The base station performs preliminary resource allocation before LBT and transmits this initial resource size information to the mobile station in advance. This preliminary action allows the mobile station to have prior knowledge of the configured resource size, which it can then adjust based on the actual resource allocation after LBT completion, ensuring accurate data decoding.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements a feedback mechanism where the mobile station receives both the initial resource size configured before LBT and the actual resource size allocated after LBT completion. The mobile station uses this feedback information to adjust its decoding parameters accordingly, ensuring accurate data reception despite resource allocation changes.

Inventive Principle:

Principle #23Feedback

2Reliability

If the base station provides both initial resource size and actual resource size information to the mobile station, then accurate data reception is ensured, but control signal overhead increases

Engineering Contradiction:

Improvedata reception accuracyVSAvoidcontrol signal overhead

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The base station merges the transmission of initial resource size information and actual resource size information into a unified control signal structure. By combining these information elements and transmitting them together, the system reduces the total number of separate control signals required, thereby reducing control signal overhead while ensuring the mobile station receives both necessary pieces of information for accurate data reception.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12593249B2Mobile station, base station, reception method, and transmission method

Publication Date: 2026.03.31 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

Data communication can be appropriately performed in unlicensed bands. A mobile station (200) includes: reception circuitry, which, in operation, receives first information relating to a size configured for data, and second information relating to a resource to which the data is assigned; and control circuitry, which, in operation, controls reception of the data based on the first information and the second information.