Supplementary Uplink Frequency Selection for 5G Random Access
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Solution Overview
Problem
Inconsistency between uplink and downlink service areas in wireless communication systems, particularly in 5G networks, leads to performance limitations and access congestion, which existing technologies have not adequately addressed.
Innovation Solution
Implementing a supplementary uplink frequency, such as 1.8 GHz, alongside the primary uplink frequency, 3.5 GHz, to expand the service area and manage access congestion by selecting one frequency for random access and uplink data transmission, using predetermined information from the base station to minimize complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single uplink frequency (3.5 GHz) is used for uplink transmission, then the system is simple to operate, but the service area is limited and access congestion occurs
Solution Approach 1:
The uplink frequency resource is segmented into two distinct frequency bands: the primary uplink frequency (3.5 GHz) and the supplementary uplink frequency (1.8 GHz). Each frequency band serves specific functions and transmission units, allowing the system to expand the service area by utilizing the lower frequency band for broader coverage while maintaining the higher frequency band for capacity-intensive transmissions.
Solution Approach 2:
The patent introduces an additional frequency dimension (1.8 GHz supplementary uplink) to the existing single frequency (3.5 GHz) system. This dimensional expansion allows the system to simultaneously support both wide-area coverage and high-capacity transmission by selecting appropriate frequencies based on transmission unit type and service requirements.
2Productivity
If multiple frequencies are used for uplink transmission, then access congestion is reduced, but the terminal complexity increases
Solution Approach 1:
The base station performs preliminary configuration by pre-defining which transmission units should use the supplementary uplink frequency versus the primary uplink frequency. This preliminary action eliminates the need for complex real-time frequency selection algorithms at the terminal, as the frequency choice is determined in advance based on transmission unit characteristics and service requirements.
Solution Approach 2:
The patent changes the frequency parameter (from single 3.5 GHz to dual 3.5 GHz and 1.8 GHz) based on the type of transmission unit and service requirements. Different frequency parameters are applied to different transmission units, optimizing access efficiency for each while maintaining manageable terminal complexity through rule-based selection.
3Area of stationary object
If supplementary uplink frequency is configured for all transmission units, then service area coverage is maximized, but power consumption increases
Solution Approach 1:
The supplementary uplink frequency configuration is applied locally and selectively to specific transmission units rather than universally to all transmission units. The patent determines which transmission units benefit from supplementary uplink based on their characteristics, service requirements, and coverage needs, thereby maximizing service area coverage only where necessary while minimizing unnecessary power consumption.
Data Source
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AI summary
The present disclosure relates to a communication technique and a system thereof that fuses a 5G communication system for supporting higher data rate after a 4G system. The present disclosure is enabled to be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security and safety related services, etc.) based on 5G communication technology and IoT related technology. According to the present disclosure, it is possible to effectively process a registration request message sent by a terminal registered using a temporary user ID. A method for performing a random access by a terminal is provided. The method includes receiving information for performing a random access from a base station (BS), determining a frequency band to perform the random access among a first frequency band and a second frequency band based on the information for performing the random access, and transmitting a first random access preamble to the BS on the determined frequency band.