V2X Resource Pool Determination Using Repeated Bitmap
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Solution Overview
Problem
There is a need for an efficient method to determine a resource pool for Vehicle-to-X (V2X) communication that avoids collisions with other transmissions and ensures effective transmission of control information and data.
Innovation Solution
A method and apparatus that use a repeated bitmap to determine a subframe pool for V2X communication by excluding sidelink synchronization signal resources and uplink subframes, ensuring efficient transmission while avoiding collisions with other transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resource pool is defined for V2X communication without excluding specific subframes, then resource utilization is maximized, but collisions with synchronization signals and uplink transmissions occur
Solution Approach 1:
The patent extracts and excludes specific subframes from the resource pool that are used for SLSS transmission or uplink communication. By removing these subframes from the set of available resources for V2X data transmission, the patent prevents collisions between V2X transmissions and synchronization signals or uplink transmissions, thereby improving transmission reliability without causing harmful interference
Solution Approach 2:
The patent segments the available subframes into different categories: subframes excluded from resource pool (used for SLSS or uplink), and subframes included in resource pool (available for V2X data transmission). This segmentation is achieved by applying a bitmap pattern that identifies which subframes should be excluded, creating a structured division of time resources to avoid collisions
2Productivity
If a detailed scheme is created for determining time-domain resource pool, then transmission efficiency is improved, but system complexity increases
Solution Approach 1:
The patent uses a bitmap pattern that can be repeatedly applied across multiple periods to determine resource pool configuration. Instead of creating complex unique patterns for each period, the same bitmap template is copied and applied periodically, simplifying the determination process while maintaining detailed control over which subframes are excluded. This reduces device complexity through template reuse while preserving transmission efficiency through precise subframe selection
Solution Approach 2:
The patent implements periodic resource pool determination by applying the bitmap pattern at regular intervals (e.g., every 20 subframes or 40 subframes). This periodic approach allows the system to maintain a detailed resource allocation scheme while reducing complexity through repetition of the same pattern, making the resource determination process more manageable and predictable
Data Source
AI summary
A method includes receiving, at a mobile device, resource pool configuration information, the resource pool configuration information comprising a bitmap to determine the resource pool and determining, for a period having a plurality of consecutive subframes, a first subset of subframes by excluding, from the plurality of consecutive subframes, subframes in which a sidelink synchronization signal (SLSS) resource is configured and subframes other than uplink subframes. The method also includes determining, for the period, a second subset of subframes by excluding, from the first subset of subframes, one or more subframes, wherein a quantity of the second subset of subframes corresponds to an integer multiple of a length of the bitmap, and determining, based on a plurality of repetitions of the bitmap, the resource pool for a sidelink transmission from the second subset of subframes.