Wireless Network Access Using Beamformed RACH Configuration
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving energy efficiency due to always-on broadcast signaling and the need to support diverse sets of services in the same spectrum, which legacy systems struggle to handle effectively.
Innovation Solution
The implementation of 5gFLEX technology, which includes flexible radio access methods and waveforms like OFDM-OQAM and UFMC, allows for efficient spectrum utilization and reduced energy consumption by minimizing unnecessary transmissions, supporting diverse access methods for various use cases such as eMBB, mMTC, and URLLC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If always-on broadcast signaling is used to support diverse services, then service coverage and reliability are improved, but energy consumption increases
Solution Approach 1:
The patent implements discontinuous transmission of broadcast signaling where the gNB transmits broadcast channels (PBCH, SIB) only in specific periodic intervals rather than continuously. This allows UEs to enter sleep modes during non-transmission periods, significantly reducing energy consumption while maintaining service coverage through periodic updates.
Solution Approach 2:
The system dynamically adapts broadcast signaling transmission based on network conditions and UE requirements. Different service types (eMBB, mMTC, URLLC) receive customized broadcast configurations, allowing the system to optimize energy consumption while maintaining reliability for each service category.
2Adaptability or versatility
If legacy radio access methods are used, then system compatibility is maintained, but spectrum utilization efficiency and energy efficiency deteriorate
Solution Approach 1:
The patent introduces a universal radio access framework that supports multiple access methods (CFRA, CFAR, GFAR) within a single system. This allows legacy UEs to operate with traditional methods while new UEs can utilize advanced waveforms like OFDM-OQAM and UFMC, achieving both compatibility and improved spectrum efficiency simultaneously.
Solution Approach 2:
The system changes key radio access parameters including waveform type, access channel configuration, and transmission timing based on service requirements. This enables flexible adaptation from legacy parameters to optimized parameters for 5G services, improving spectrum utilization while maintaining backward compatibility.
3Adaptability or versatility
If multiple access methods are supported for diverse services, then service versatility is improved, but system complexity increases
Solution Approach 1:
The patent segments the random access procedure into distinct types (contention-free, contention-based with grant, contention-based without grant) and further divides access channels into dedicated and common resources. This segmentation allows UEs to select appropriate access methods based on service requirements, managing complexity through structured organization.
Solution Approach 2:
The gNB acts as an intermediary that receives service type indications from upper layers and translates them into specific radio access configurations. This intermediary function simplifies the overall system by centralizing the complexity of managing multiple access methods in the network side rather than requiring complex UE-side decision-making.
Data Source
AI summary
Methods and apparatuses for accessing a wireless network are provided herein. A method according to at least one embodiment includes transmitting a transmission including system information indicating a random access channel (RACH) configuration. The RACH configuration indicates one or more RACH occasions and one or more preambles. Each of the RACH occasions are associated with at least one of the preambles. The method further includes transmitting one or more reference signals and receiving one of the preambles in one of the RACH occasions that is associated with the received preamble. The received preamble uses beamforming parameters associated with at least one of the transmitted reference signals.