Flexible Data Channel Start Position Indication in Wireless Networks

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Solution Overview

Problem

In wireless communication networks, particularly in LTE technology, there is a challenge in efficiently controlling radio transmissions to avoid overlap of radio resources used for data channels and control channels, which can lead to inefficient resource allocation and potential interference.

Innovation Solution

A method where a node in the network manages the sending of control information to indicate different start positions for data channels in various frequency bands, allowing for flexible control of data channel transmissions based on potential interference with control channels, thereby optimizing resource allocation and minimizing overlap.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the PDSCH starts at the first OFDM symbol of a subframe to maximize resource utilization, then resource allocation efficiency is improved, but overlap with PDCCH resources occurs causing interference

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidinterference between data channel and control channel

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the frequency spectrum into multiple frequency bands and applies different start position configurations to different bands. This allows the PDSCH to start at different symbols in different frequency bands, enabling resource optimization in some bands while avoiding PDCCH overlap in others.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements local quality by allowing different start position configurations for different frequency bands rather than applying a uniform configuration across the entire spectrum. This enables tailored resource allocation that optimizes performance locally in each band while considering local PDCCH placement.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If flexible start position indication is implemented for different frequency bands, then resource allocation flexibility is improved, but control information complexity increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidcontrol information structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent introduces dynamic start position indication through RRC signaling that can be configured per frequency band. The start position is no longer fixed but can be dynamically adjusted based on network conditions, PDCCH placement, and traffic requirements in each frequency band.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of start position from a fixed value to a configurable parameter that can take different values in different frequency bands. This is achieved through RRC signaling that carries start position information specific to each frequency band, allowing independent optimization.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11997044B2Flexible indication for start position of data channel

Publication Date: 2024.05.28 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A node (100) of a wireless communication network manages sending of control information to a radio device (10). For a first frequency band, the control information indicates a first start position for transmission of a data channel. For a second frequency band, the control information indicates a second start position for transmission of the data channel. Based on the first start position and the second start position, the node (100) controls transmission of data on the data channel.