5G Frame Structure for Flexible Spectrum Utilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current duplex modes in 5G wireless communication systems, such as FDD and TDD, face limitations in spectrum efficiency and flexibility, leading to challenges in random access preamble transmission and interference control, particularly with the increasing demand for higher frequency bands and diverse application scenarios.
Innovation Solution
A new frame structure is introduced, comprising a control channel band, an anchor subband, and a data transmission band, which allows for flexible scheduling and improved spectrum utilization by detecting synchronization signals, acquiring random access configuration information, and determining optimal transmit power for random access preambles based on new carrier ranges and subcarrier spacing sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional FDD or TDD duplex modes are used in 5G systems, then basic uplink and downlink communication can be established, but spectrum efficiency and system flexibility deteriorate due to fixed frame structures and inability to adapt to diverse application scenarios
Solution Approach 1:
The patent implements dynamic TDD (DTT) where the uplink-downlink configuration can be flexibly adjusted based on traffic conditions and service requirements. The base station can dynamically change the frame structure, including the position and length of uplink slots, downlink slots, and guard periods, allowing the system to adapt to varying spectrum efficiency demands while maintaining reliable communication
Solution Approach 2:
The patent changes key frame structure parameters including subcarrier spacing sizes (15kHz, 30kHz, 60kHz, 120kHz), cyclic prefix lengths, and uplink-downlink slot configurations to optimize performance for different services. By adjusting these parameters dynamically, the system achieves both reliable communication and high spectrum efficiency adaptation to diverse scenarios
2Ease of manufacture
If fixed frame structures are used for random access, then implementation is simple, but access success probability deteriorates due to interference and delay in higher frequency bands
Solution Approach 1:
The patent adjusts random access parameters including preamble formats, subcarrier spacing, and power compensation values based on frequency band and channel conditions. This allows the system to maintain simple implementation while improving access success probability by optimizing parameters for mmWave and other high-frequency bands
Solution Approach 2:
The patent performs preliminary power compensation and configuration for random access preambles based on expected channel conditions and frequency band characteristics. By pre-configuring appropriate power levels and parameters before actual access attempts, the system simplifies the access process while improving success probability in challenging high-frequency environments
3Productivity
If larger bandwidths are allocated for data transmission, then data rate increases, but interference control becomes more difficult and spectrum utilization efficiency deteriorates
Solution Approach 1:
The patent segments the available bandwidth into multiple subbands and allocates them dynamically to different users and services based on channel conditions and interference levels. This segmentation allows high data rates through efficient resource utilization while maintaining interference control by isolating different transmissions in frequency domains
Solution Approach 2:
The patent applies different transmission parameters, power levels, and modulation schemes to different subbands based on local channel quality and interference conditions. This allows the system to achieve high overall data rates by optimizing each subband independently while controlling interference through localized parameter adjustment
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as long term evolution (LTE). The method for operating a user equipment (UE) in a wireless communication system is provided. The method includes detecting a synchronization signal block, performing downlink synchronization process according to the detected synchronization signal block, and determining time-frequency resources of an anchor subband; acquiring random access configuration information according to the time-frequency resources of the anchor subband, performing a random access process according to the random access configuration information, and completing uplink synchronization; and acquiring control information in a control channel band, and performing data communication with a base station in the data transmission band according to the control information.