RRC Signaling Integration for V2X Latency Reduction

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Solution Overview

Problem

Current wireless communication systems face challenges in reducing latency and processor utilization during unicast connection setup and maintenance in direct communication scenarios, such as V2X communications, due to the separation of upper layer signaling and RRC signaling procedures.

Innovation Solution

Integrating upper layer signaling with RRC signaling by transmitting RRC messages that include upper layer signaling messages, allowing for the encapsulation or replacement of upper layer signaling information within RRC messages, thereby reducing the number of handshake messages and improving processor efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If upper layer signaling and RRC signaling are transmitted separately, then the signaling procedures are well-defined and standardized, but the latency increases and processor utilization increases

Engineering Contradiction:

Improvesignaling procedure standardizationVSAvoidconnection setup latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent combines upper layer signaling messages with RRC signaling messages into a single transmission. The upper layer signaling message is embedded within the RRC message, allowing both types of signaling to be transmitted simultaneously over the air interface, thereby reducing the number of separate transmissions and lowering latency.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The upper layer signaling message is nested within the RRC signaling message structure. This nesting approach allows the upper layer information to be carried as part of the RRC message payload, effectively packaging multiple layers of signaling within a single transmission frame.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of operation

If upper layer signaling and RRC signaling are transmitted separately, then the processing can be done in discrete steps, but the processor utilization increases

Engineering Contradiction:

Improvediscrete processingVSAvoidprocessor utilization

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

By merging upper layer signaling processing with RRC signaling processing into a unified procedure, the patent reduces the total number of discrete processing steps. The UE processor handles both types of signaling in a single processing pass, reducing overall processor utilization and energy consumption.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If multiple handshake messages are exchanged between UEs, then the connection setup is thorough and reliable, but the latency and number of transmissions increases

Engineering Contradiction:

Improveconnection setup reliabilityVSAvoidconnection setup speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent merges multiple handshake messages into a single combined transmission by embedding upper layer signaling within RRC signaling. This reduces the number of back-and-forth message exchanges between UEs while maintaining the completeness and reliability of connection setup procedures.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12127292B2Coordinating radio resource control signaling with upper layer direct link establishment procedures

Publication Date: 2024.10.22 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may initiate a radio resource control (RRC) layer signaling procedure between the UE and a target UE, include an upper layer signaling message in an RRC message based in part on the RRC layer signaling procedure, and transmit the RRC message including the upper layer signaling message to the target UE. Alternatively, upper layer signaling messages may be transmitted separately before or after the RRC layer signaling procedure.