Sidelink Identification Using Full and Short IDs

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Solution Overview

Problem

Current wireless communication systems lack a mechanism for unambiguous identification of sidelinks at the Layer 1 (L1) level, leading to issues in correctly transmitting and receiving L1 signaling, especially in scenarios with multiple simultaneous sidelinks, which affects the operation of UEs and base stations.

Innovation Solution

The implementation of a sidelink ID determination method that uses a combination of full and short IDs for each UE, allowing for unique identification of sidelinks on L1, reducing overhead and enabling simultaneous operation of multiple sidelinks by using a full ID for one UE and a short ID for the other, or vice versa, based on conditions such as data transmission direction, ID size, and simultaneous sidelink involvement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a full ID is used for both UEs in sidelink identification, then unique identification is achieved, but signaling overhead increases

Engineering Contradiction:

Improveidentification accuracyVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The identification system is segmented into two parts: a full ID (e.g., 24 bits) for unique identification and a short ID (e.g., 4-8 bits) for efficient signaling. The full ID ensures unique identification while the short ID reduces overhead in frequent transmissions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different identification methods are applied to different UEs based on local conditions. One UE uses a full ID while the other uses a short ID, allowing the system to optimize overhead for the UE that requires less identification precision in certain contexts.

Inventive Principle:

Principle #3Local quality

2Loss of substance

If only short IDs are used for sidelink identification, then overhead is reduced, but identification ambiguity increases in multiple simultaneous sidelinks

Engineering Contradiction:

Improvesignaling overheadVSAvoididentification accuracy

Core Design Contradiction:

Loss of substanceVSReliability

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The identification approach is asymmetric: one UE is assigned a full ID while the other is assigned a short ID. This asymmetry allows the system to balance between unique identification and overhead reduction, as the full ID provides disambiguation capability when needed.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS11291059B2Methods, user equipment and base station for sidelink identification

Publication Date: 2022.03.29 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

Methods, a user equipment (UE) and a base station are disclosed for sidelink identification. According to an embodiment, a first UE participates in an identity (ID) determination procedure such that a sidelink ID is determined for a sidelink between the first UE and a second UE. The sidelink ID comprises a full ID for identifying one of the first and second UEs and a short ID for identifying the other of the first and second UEs.