Wireless Repeater Chain CA Control via PCC Frequency Selection

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Solution Overview

Problem

Current methods for controlling Carrier Aggregation (CA) in wireless repeater chains are inefficient and ineffective, leading to significant delays and requiring different radio frequency bands and component carrier configurations for User Equipment (UE) further down the repeater chain.

Innovation Solution

A wireless access point controls CA by selecting a radio frequency for the Primary Component Carrier (PCC) and determining the number of Secondary Component Carriers (SCCs) based on the number of repeater hops, using metrics like Group Delay Variation (GDV) to optimize signal strength and throughput, thereby adjusting the CA configuration dynamically.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If wireless repeaters are added to expand coverage area, then the coverage area of the wireless access point is extended, but accumulated delay increases significantly for UEs further down the repeater chain

Engineering Contradiction:

Improvecoverage areaVSAvoidaccumulated delay

Core Design Contradiction:

Area of stationary objectVSLoss of time

Solution Approach 1:

The system dynamically changes radio frequency parameters (PCC frequency selection, CA configuration) based on the number of repeater hops to optimize performance. UEs experiencing higher delay due to more repeater hops are assigned different frequency parameters to compensate for the degradation

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The wireless access point acts as an intermediary that controls CA configurations for UEs based on their position in the repeater chain. The eNB monitors delay characteristics and adjusts PCC/SCC assignments to mitigate the adverse effects of signal repetition

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If different radio frequency bands and CA configurations are used for UEs further down the repeater chain, then communication reliability is maintained, but device complexity and control difficulty increase

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidcontrol complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system uses parameter changes (PCC frequency, CA configuration) to maintain reliability, but this creates complexity in managing multiple parameter sets for different UE positions in the repeater chain

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The CA configuration is made dynamic, allowing the eNB to adjust PCC and SCC assignments based on real-time conditions. This enables the system to adapt to varying delay characteristics while maintaining a unified control architecture

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11330586B2Wireless access point control over carrier aggregation (CA) through a wireless repeater chain

Publication Date: 2022.05.10 T MOBILE INNOVATIONS LLC

AI summary

A wireless access point controls Carrier Aggregation (CA) over a wireless repeater chain. The wireless access point exchanges signaling with User Equipment (UE) over the wireless repeater chain which uses a number of repeater hops. The wireless access point selects a radio frequency for a Primary Component Carrier (PCC) based on the number of repeater hops. The wireless access point exchanges user data with the UE over the wireless repeater chain using the selected radio frequency for the PCC. The wireless access point determines uplink throughput for the user data. The wireless access point re-selects the radio frequency for the PCC based on the number of repeater hops and the uplink throughput. The wireless access point exchanges additional user data with the UE over the wireless repeater chain using the re-selected radio frequency for the PCC.