Radar-Enabled UE Coexistence Control in mmWave TDD Networks

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Solution Overview

Problem

The operation of radar-enabled UEs in the same or overlapping millimeter wave frequency range as wireless communication networks leads to significant interference between radar transmissions and communication transmissions, particularly in the uplink and downlink phases of TDD systems, affecting both network nodes and other UEs.

Innovation Solution

A network node coordinates resource management and power control to mitigate interference by identifying and managing 'restricted' and 'unrestricted' beams, using techniques such as uplink and downlink resource reservation, power control, signal processing, and waveform allocation to ensure coexistence of radar sensing and network communications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If radar-enabled UEs use the same millimeter wave frequency range for radar probing as wireless communication networks, then radar sensing capability is enabled, but significant interference occurs between radar transmissions and communication transmissions

Engineering Contradiction:

Improveradar sensing capabilityVSAvoidinterference between radar and communication transmissions

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the frequency spectrum by identifying and reserving specific frequency resources for radar operations. The network identifies frequency resources that radar transmissions will use and reserves them to avoid interference with communication transmissions, allowing both radar sensing and communication to operate simultaneously without significant mutual interference

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces network nodes as intermediaries to coordinate between radar-enabled UEs and communication networks. The network node receives information about radar operations, determines affected frequency resources, and coordinates communication transmissions to avoid interference, acting as a mediator that enables both radar sensing and communication to coexist

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If radar transmissions are allowed in the same frequency range as network communications, then frequency spectrum utilization is improved, but interference with uplink and downlink phases of TDD systems occurs

Engineering Contradiction:

Improvefrequency spectrum utilizationVSAvoidcommunication transmission reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by having network nodes identify and reserve frequency resources before radar transmissions occur. The network receives advance information about radar operations and pre-determines which frequency resources will be affected, allowing communication transmissions to be scheduled around these resources in advance, ensuring reliability is maintained while still allowing radar operations

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent changes the parameter of frequency resource allocation dynamically based on radar operations. The network adjusts which frequency resources are available for communication transmissions by identifying radar frequency resources and reserving them, thereby adapting the frequency spectrum utilization to accommodate both radar sensing and communication needs while maintaining communication reliability

Inventive Principle:

Principle #35Parameter changes

3Productivity

If antenna panels are installed in different locations within UE to enable beamforming, then communication performance is improved, but complexity of managing radar and communication operations increases

Engineering Contradiction:

Improvecommunication performanceVSAvoidcomplexity of managing radar and communication operations

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent makes the antenna panels multi-functional by enabling them to serve both communication and radar operations. The same antenna panels that perform beamforming for communication also transmit radar signals, eliminating the need for separate dedicated radar antennas and reducing overall system complexity while maintaining communication performance

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent enables the radar-enabled UE to self-manage its radar and communication operations by autonomously identifying restricted and unrestricted beams and reporting this information to the network. The UE independently determines which antenna panels and beams should be used for radar versus communication, reducing the management complexity that would otherwise require centralized control

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP4179353B1Network-based co-existence operations involving a radar-enabled user equipment

Publication Date: 2026.02.18 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

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AI summary

One or more network nodes are configured for operation in a wireless communication network and, specifically, are configured to provide for co-existence between radar-scanning operations of a radar-enabled UE and network communications, where the radar transmissions are in a same or overlapping frequency range as regards the network communications. In an example implementation, a radio network node, referred to as an access point or base station supports coexistence between radar sensing and network communications that are subject to interference from the radar sensing.