Uplink Reference Signal Sequence Assignment for Shared Resource Collision Avoidance
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving signals, particularly in managing shared resources among user equipment (UE) and preventing collisions in uplink/downlink signals, which affects communication quality and resource utilization.
Innovation Solution
A method where user equipment (UE) receives configuration information on shared resources from an eNB, generates a reference signal, and maps it to a resource unit for efficient signal transmission and reception, using a specific sequence from a designated set to prevent collisions and optimize power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple user equipment share the same resource for signal transmission, then resource utilization efficiency is improved, but signal collision and interference increase
Solution Approach 1:
The patent segments the shared resource by introducing different reference signal sequences for different user equipment. Each UE is assigned a specific sequence from a codebook, which divides the shared resource space into distinct signal spaces, allowing multiple UEs to transmit simultaneously without collision while maintaining high resource utilization.
2Reliability
If reference signal sequences are randomly selected for each UE, then collision prevention is improved, but sequence selection complexity increases
Solution Approach 1:
The patent changes the parameter of sequence selection from random to deterministic based on pre-configured codebooks and UE-specific indices. Each UE selects sequences based on parameters such as UE ID, cell ID, and resource block index, which simplifies the selection process while ensuring unique sequence assignment and collision prevention.
3Reliability
If transmit power is increased for all UEs, then signal quality is improved, but overall power consumption increases
Solution Approach 1:
The patent applies local quality by enabling each UE to transmit at its own optimal power level rather than requiring all UEs to use high power. The orthogonal reference signal sequences allow the eNB to distinguish between UEs even at lower power levels, so each UE can maintain signal quality while consuming less power, achieving energy-efficient communication.
Data Source
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AI summary
A method for transmitting and receiving a signal based on a shared resource according to one embodiment of the present invention is provided, wherein configuration information about the shared resource can be received from a base station, a reference signal for uplink data can be generated, and the reference signal for transmitting the uplink data of the shared resource can be mapped to a resource unit and the same can be generated based on a specific sequence in a reference signal sequence set that is assigned with respect to the shared resource.