D2D Pseudo-Random Sequence Initialization for Resource Pool Adaptation
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Solution Overview
Problem
In Device-to-Device (D2D) communication, existing methods face challenges in effectively utilizing limited frequency resources, leading to potential communication issues when using only standard wireless communication system parameters without considering the specific characteristics of D2D communication.
Innovation Solution
Defining an adaptive initial value for a pseudo-random sequence and determining its timing allows for effective configuration of pseudo-random sequences for group hopping in accordance with D2D resource configurations, enhancing resource utilization in D2D communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing wireless communication system parameters are used for D2D communication, then compatibility with standard systems is maintained, but resource utilization efficiency deteriorates due to not considering D2D specific characteristics
Solution Approach 1:
The patent changes key parameters including defining a new initial value for pseudo-random sequence generation specific to D2D communication, redefining slot number determination methods, and adjusting timing relationships to adapt to D2D characteristics while maintaining systematic structure
Solution Approach 2:
The patent creates a unified parameter set that serves both D2D communication and maintains compatibility with existing wireless communication frameworks, allowing the same system to handle both standard and D2D-specific operations through standardized interfaces
2Reliability
If limited frequency resources are used for D2D communication, then resource constraints are acknowledged, but communication reliability deteriorates without optimized resource allocation
Solution Approach 1:
The patent performs preliminary configuration of pseudo-random sequences and resource allocation parameters before actual D2D communication occurs, pre-optimizing resource usage patterns to ensure reliable communication within limited frequency resources
Solution Approach 2:
The patent introduces dynamic slot number determination and timing adjustment mechanisms that adapt resource allocation in real-time based on communication conditions, maximizing the utilization of limited frequency resources while maintaining reliability
Data Source
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AI summary
A method of performing a device-to-device, D2D, communication between user equipments, UEs, the method comprising: determining D2D subframes available for a D2D communication; and processing an initialization associated with a pseudo-random sequence of a D2D communication at a start of the D2D subframes, wherein the D2D subframes comprise a first D2D subframe and a second D2D subframe, wherein each of the first D2D subframe and the second D2D subframe comprises D2D slots, wherein the D2D slots comprise D2D slot number 0 and D2D slot number 1, and wherein the first D2D subframe and the second D2D subframe are included in the same resource pool defined in at least two radio frames; wherein the processing the initialization comprises, when a group hopping for a demodulation reference signal, DM-RS, associated with a transmission of a physical sidelink shared channel, PSSCH, is enabled, computing a group hopping initialization value associated with the group hopping at the start of each of the D2D subframes corresponding to D2D slot number 0.