MAC TB Formation for V2X SL-UL Collision Avoidance
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Solution Overview
Problem
In V2X communication, the existing methods for MAC TB formation and MCR selection face inefficiencies due to the need for separate TBs for each destination with different MCRs, leading to resource wastage and potential QoS non-fulfillment, especially in scenarios with multiple destinations and varying communication requirements.
Innovation Solution
The proposed methods involve multiplexing SL LCH data with different MCRs into the same MAC TB, prioritizing transmissions based on QoS priorities, and determining MCRs based on the highest priority LCH or common MCR for efficient data transmission, allowing for simultaneous transmission to multiple destinations within a single TB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate TBs are formed for each destination with different MCRs, then QoS requirements for each destination are met, but resource wastage increases and system efficiency decreases
Solution Approach 1:
The patent combines multiple SL LCH data with different MCRs into a single MAC TB by multiplexing them together. The MAC layer multiplexes data from multiple logical channels having different MCR requirements into one transport block, eliminating the need to create separate TBs for each destination while still meeting QoS requirements through proper MCR determination and transmission.
Solution Approach 2:
The patent creates a universal MAC TB formation mechanism that can handle multiple destinations with different MCR requirements using a single standardized process. The MAC layer implements a multi-functional multiplexing capability that accommodates various LCH data types and MCR values within the same TB structure, improving system efficiency while maintaining QoS compliance.
2Reliability
If separate TBs are formed for each destination with different MCRs, then QoS requirements are met, but device complexity and processing overhead increase
Solution Approach 1:
The patent reduces device complexity by merging the TB formation process for multiple destinations into a single unified MAC TB. Instead of independently forming separate TBs for each destination, the MAC layer consolidates multiple LCH data into one TB through multiplexing, simplifying the overall processing workflow while maintaining QoS requirements.
Solution Approach 2:
The patent applies preliminary action by determining the MCR for the MAC TB based on the highest priority LCH before transmission. This pre-determination of MCR based on priority rules simplifies subsequent processing steps and reduces the complexity of real-time decision-making during transmission, while ensuring QoS requirements are met.
3Productivity
If multiple LCH data with different MCRs are multiplexed into the same MAC TB, then resource efficiency improves, but MCR determination becomes more complex
Solution Approach 1:
The patent resolves MCR determination complexity by performing preliminary action - determining the MCR for the MAC TB based on the highest priority LCH before the multiplexing and transmission process. This pre-determination approach simplifies the overall system by establishing a clear rule-based method for MCR selection, avoiding complex real-time calculations while maintaining high data delivery efficiency.
Solution Approach 2:
The patent applies parameter changes by using the priority parameter of LCHs to determine the MCR of the multiplexed MAC TB. Instead of complex multi-parameter optimization, the system changes the determination approach to rely on the priority parameter, which simplifies the decision-making process while maintaining productivity through efficient resource utilization.
4Reliability
If separate TBs are transmitted to multiple destinations, then QoS is ensured, but transmission latency increases
Solution Approach 1:
The patent reduces transmission latency by merging multiple LCH data into a single MAC TB that can be transmitted simultaneously to multiple destinations. This consolidation eliminates the sequential transmission delays that would occur with separate TBs, while QoS is maintained through proper MCR determination based on the highest priority LCH and appropriate transmission parameters.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for MAC TB formation and MCR selection. One apparatus includes at least one processor coupled with at least one memory and configured to cause the apparatus to detect a time-domain collision between a SL transmission and an UL transmission, where the apparatus does not support simultaneous transmission on both SL and UL. The at least one processor is configured to cause the apparatus to identify a QoS priority of the SL transmission and a QoS priority of the UL transmission. The at least one processor is configured to cause the apparatus to prioritize the SL transmission over the UL transmission based on the QoS priority of the SL transmission being less than a SL priority threshold and the QoS priority of the UL transmission not being less than a UL priority threshold.