NOMA Resource Allocation via RRC Release Signaling
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Solution Overview
Problem
Current wireless communication systems, particularly 5G, face challenges in efficiently transmitting and receiving signals, especially in non-orthogonal multiple access (NOMA) scenarios, which affect resource allocation and interference management in uplink control information transmission.
Innovation Solution
The method involves a terminal and base station operation where the terminal receives a radio resource control (RRC) release message to identify transmission resources for data transmission, transmits data and a random access preamble, and receives a random access response, with resource allocation based on configuration information and resource identification, enabling efficient utilization of resources in NOMA.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-orthogonal multiple access (NOMA) is implemented to increase system capacity and spectral efficiency, then more users can be served simultaneously, but signal interference between users increases making signal detection and resource allocation more complex
Solution Approach 1:
The base station performs preliminary signal estimation and interference prediction before actual data detection. By anticipating interference patterns from multiple NOMA users and pre-calculating separation parameters, the system reduces the complexity of real-time signal processing while maintaining high user capacity
Solution Approach 2:
An intermediary signal processing layer is introduced that separates and processes signals from different NOMA users through successive interference cancellation (SIC). This intermediary mechanism handles the complexity of interference management, allowing the system to serve more users without proportionally increasing overall system complexity
2Productivity
If random access resources are shared among multiple users to improve resource utilization, then resource efficiency increases, but collision probability during random access procedure increases
Solution Approach 1:
The random access resources are segmented into multiple orthogonal codes or sequences that are assigned to different users or user groups. This segmentation allows multiple users to access the shared resource simultaneously with reduced collision probability, as each user is allocated a distinct access signature within the shared resource pool
Solution Approach 2:
The system dynamically adjusts random access parameters such as preamble sequence length, code division multiplexing factors, and power control settings based on current network conditions and user density. By changing these parameters adaptively, the system maintains high resource utilization while controlling collision probability through optimized access conditions
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Disclosed is a method for more efficiently transmitting uplink control information and data in a mobile communication system operating in an unlicensed band or in a mobile communication system requiring a channel sensing operation.