Single-Code UE Scheduling via RNTI Scrambling
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR networks, face challenges in efficiently supporting single-code user equipment (UE) that operate with a single coding scheme, as they are typically designed for dual-coding schemes like polar codes for control and LDPC codes for data, which can lead to complexity and power consumption issues in low-cost, low-complexity devices such as mMTC and NB-IOT UEs.
Innovation Solution
The system determines whether a serving base station supports single-code transmissions by identifying specific RNTIs and resource allocations, allowing UEs to communicate using a single coding scheme by receiving scheduling messages with CRC scrambled with RNTIs associated with single-code transmissions, and determining resources based on these messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication systems use dual-coding schemes (polar codes for control and LDPC codes for data), then communication reliability and performance are improved, but device complexity and power consumption increase for low-cost devices
Solution Approach 1:
The patent introduces a capability indicator parameter that changes the coding scheme parameter from dual-code to single-code based on device capabilities. The base station receives this indicator and adjusts the coding parameter accordingly, allowing low-complexity devices to use simplified single-code schemes while maintaining reliability for capable devices
Solution Approach 2:
The patent segments the user equipment into different capability groups (single-code capable vs. dual-code capable). By segmenting the device population and applying different coding schemes to different segments, the system achieves reliability for capable devices while reducing complexity for low-cost devices
2Productivity
If wireless communication systems use dual-coding schemes (polar codes for control and LDPC codes for data), then communication performance is improved, but power consumption increases for low-complexity devices
Solution Approach 1:
The patent changes the coding scheme parameter based on device capability indicators. Low-power devices can operate with single-code schemes that consume less energy, while maintaining communication performance through optimized resource allocation and base station support
3Adaptability or versatility
If the system supports both single-code and multi-code transmissions, then adaptability to different device types is improved, but system complexity increases
Solution Approach 1:
The patent performs preliminary classification of devices based on their coding capability indicators before actual communication. The base station pre-configures appropriate coding schemes and resource allocations based on received capability indicators, avoiding the need for complex real-time switching and reducing overall system complexity
Solution Approach 2:
The patent creates a universal framework where a single system can serve both single-code and dual-code capable devices through a unified capability indication mechanism. The base station universally applies the same principle (checking capability indicators and adjusting coding schemes) to all devices, achieving versatility without proportionally increasing complexity
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A wireless device may determine that a serving base station supports multi-code and single-code transmissions, receiving a scheduling message having a cyclic redundancy check scrambled with a radio network temporary identifier (RNTI), determine resources for communicating with the serving base station based on the scheduling message, and communicate on the resources using coding associated with the single-code transmissions. A base station may identify at least one user equipment that supports single-code transmissions, transmit a scheduling message having a cyclic redundancy check (CRC) scrambled with a radio network temporary identifier (RNTI), wherein the scheduling message schedules the at least one user equipment for communication on resources using coding associated with the single-code transmissions and communicate with the at least one user equipment on the resources using the coding.