Aerial UE A2X Capability Indication via Sidelink
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently supporting aircraft-to-everything (A2X) communications, particularly in indicating sidelink capabilities and configuring aerial UEs for specific A2X functions.
Innovation Solution
The proposed solution involves indicating sidelink capabilities for A2X communications by providing a separate A2X configuration distinct from the V2X structure, allowing aerial UEs to indicate support for specific A2X functions. This includes transmitting capability indications that specify supported A2X functions, such as BRID and DAA communications, and reporting access link capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate A2X configuration is provided distinct from V2X structure, then aerial UEs can indicate support for specific A2X functions (improving adaptability), but signaling overhead increases (worsening signaling overhead)
Solution Approach 1:
The capability indication is segmented into A2X-specific capability bits that are appended to existing V2X capability reports. This allows selective indication of A2X functions (such as broadcast remote ID transmission and detect-and-avoid communications) without requiring a completely separate signaling structure, thus reducing overhead while maintaining adaptability.
Solution Approach 2:
The existing V2X capability reporting structure is made multi-functional by appending A2X-specific capability bits to it. This universal approach allows the same signaling mechanism to serve both V2X and A2X capability indication purposes, reducing the need for separate dedicated signaling structures and thereby reducing overall signaling overhead.
2Productivity
If aerial UEs report comprehensive A2X capabilities, then network efficiency is improved, but power consumption increases
Solution Approach 1:
Aerial UEs report only the necessary A2X-specific capability bits (a partial set of capabilities) rather than comprehensive detailed parameters. This partial action approach provides sufficient information for network efficiency while minimizing the processing and signaling power consumption compared to reporting all possible capability parameters.
3Quantity of substance
If A2X capabilities are indicated through existing V2X structure, then signaling overhead is reduced, but adaptability for specific A2X functions is limited
Solution Approach 1:
A2X-specific capability bits are nested within the existing V2X capability report structure. This nesting allows A2X functionality indication to be embedded in the already-established V2X signaling framework, achieving both low overhead (by reusing existing structure) and high adaptability (by including specific A2X capability bits for functions like BRID and DAA).
Data Source
AI summary
Methods, systems, and devices for wireless communication are described that provide for indicating device capabilities and/or device type or category, such as UE-to-UE direct communications via a PC5 interface, for aircraft-to-everything (A2X) communications. An A2X configuration may be provided that allows aerial UEs, such as unmanned aerial vehicles (UAVs) to indicate support for specific A2X functions. A2X functionalities may indicate support for transmit and receive communications, receive-only communications, or transmit-only communications. UE capability for A2X communications may be provided using one or more A2X-specific capability bits in a vehicle-to-everything (V2X) capability report or a sidelink capability report, that may individually or jointly indicate support for broadcast remote identification (BRID) transmissions, detect-and-avoid (DAA) transmissions, both, and/or other A2X communications. Further, a UAV may report one or more access link capabilities related to UAVs.