V2X Resource Selection Diversity for Reliability
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Solution Overview
Problem
Current V2V/V2X transmission mode-4 solutions in Rel-14 do not provide adequate reliability for multicast and unicast transmissions, leading to significant consecutive packet losses in V2X mode-4 transmissions.
Innovation Solution
Implementing a method where user equipment (UE) performs concurrent and independent sensing operations to select two sets of available resources in a resource pool for transmitting data, reducing the likelihood of resource collisions by using different resource intervals and reselection procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single sensing operation and resource selection process is used in V2X mode-4 transmission, then the device complexity is reduced, but the transmission reliability deteriorates due to consecutive packet losses
Solution Approach 1:
The patent divides the single sensing operation into multiple parallel sensing operations (first sensing operation and second sensing operation). Each sensing operation independently selects resources from the resource pool, creating multiple independent resource selection processes. This segmentation reduces the probability that all selected resources will experience collisions simultaneously, thereby improving transmission reliability without requiring a single complex centralized resource allocation system.
2Reliability
If multiple independent sensing operations are performed concurrently to select different resource sets, then transmission reliability is improved through resource selection diversity, but the device complexity increases
Solution Approach 1:
The patent performs multiple sensing operations and resource selections in advance before actual data transmission. The first and second sensing operations independently identify and reserve resource sets before transmission occurs. This preliminary action ensures that diverse resource options are already prepared, allowing the system to switch to alternative resources if collisions occur, thereby improving reliability without adding complex real-time decision-making mechanisms.
3Reliability
If the same data is transmitted using multiple independently selected resource sets, then the number of consecutive packet losses is reduced, but the energy consumption increases
Solution Approach 1:
The patent implements multiple resource selection processes and transmits data over multiple resource sets, which represents an excessive action beyond the minimal single-resource approach. By transmitting the same data across multiple independently selected resource sets, the system ensures that at least some transmissions will succeed even if some resources experience collisions, thereby reducing consecutive packet losses at the cost of increased energy consumption for redundant transmissions.
Data Source
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AI summary
A method for resource selection is disclosed. The method includes performing, by a UE, a first sensing operation to determine available resources in a resource pool; transmitting, by the UE, first data using a first set of available resources, the first set of available resources having been selected from the resource pool in accordance with the first sensing operation; performing, by the UE, concurrently with the first sensing operation and resource selection of the first set of available resources and independently from the first sensing operation, a second sensing operation to determine other available resources in the resource pool; and transmitting, by the UE, second data using a second set of available resources, the second set of available resources having been selected from the resource pool in accordance with the second sensing operation, wherein the first set of available resources and the second set of available resources are independently selected.