Non-orthogonal Uplink Transmission via Identifier-Based Interleaving
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Solution Overview
Problem
Conventional uplink transmission in cellular networks requires orthogonality, leading to increased delay and power consumption due to the need for scheduling requests and grant processes, especially when data transmission is small, and lacks a solution for non-orthogonal uplink transmission methods.
Innovation Solution
A non-orthogonal uplink transmission method where terminals receive a unique identifier from the base station, apply interleaving, scrambling, and phase rotation to uplink data, eliminating the need for scheduling requests and grant processes by using identifier information for multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If orthogonality-based uplink transmission is used, then resource allocation control is maintained, but transmission delay and power consumption increase due to scheduling request and grant processes
Solution Approach 1:
The patent extracts and removes the scheduling request (SR) and grant process from the uplink transmission procedure. Terminals directly transmit uplink data using pre-configured resources without needing to request scheduling or receive grants, eliminating the delay caused by these control processes while maintaining resource allocation through pre-configuration.
Solution Approach 2:
The patent applies preliminary action by pre-configuring uplink resources and parameters (such as interleaving patterns, scrambling codes, and modulation schemes) before actual data transmission. This allows terminals to immediately transmit data without waiting for real-time scheduling decisions, reducing transmission delay while maintaining controlled resource allocation.
2Reliability
If orthogonality-based uplink transmission is used, then interference between users is avoided, but system overhead increases due to continuous scheduling control
Solution Approach 1:
The patent removes the continuous scheduling control mechanism from the uplink transmission system. By eliminating scheduling requests and grants, the system reduces control signaling overhead and associated energy consumption while maintaining interference avoidance through pre-configured orthogonal resources and identifier-based separation.
Solution Approach 2:
The patent enables terminals to autonomously determine their transmission parameters using pre-configured rules and their unique identifiers. Each terminal independently selects interleaving patterns, scrambling codes, and modulation schemes based on its identifier without needing continuous base station control, reducing system overhead while maintaining organized resource usage.
3Reliability
If scheduling request process is implemented, then resource allocation is controlled, but delay increases especially for small data transmissions
Solution Approach 1:
The patent extracts the scheduling request process entirely from the uplink transmission procedure. Terminals directly transmit data using pre-configured resources without initiating SR or receiving grants, eliminating the multi-step control process that causes delay and improving transmission efficiency for both small and large data packets.
Solution Approach 2:
The patent applies preliminary action by pre-configuring transmission resources and parameters before data arrives at the terminal. This allows immediate data transmission upon arrival without waiting for scheduling procedures, significantly improving productivity especially for small data transmissions where the overhead of scheduling becomes proportionally larger.
4Reliability
If transmission timing alignment is performed, then orthogonality is guaranteed, but additional control steps are required
Solution Approach 1:
The patent removes the explicit transmission timing alignment control step from the uplink procedure. Instead of requiring separate timing alignment operations, the system guarantees orthogonality through pre-configured resources and identifier-based parameter selection, reducing device complexity while maintaining reliability.
Solution Approach 2:
The patent applies preliminary action by pre-configuring timing parameters and resource allocations before transmission begins. Terminals use these pre-configured settings to automatically maintain proper timing and orthogonality without requiring real-time timing alignment control steps, simplifying the overall control process while guaranteeing orthogonal transmission.
Data Source
AI summary
A terminal receives allocation of a unique first identifier of the terminal from a base station. The terminal generates first uplink data. The terminal applies interleaving based on the first identifier to the first uplink data to generate second uplink data.