Uplink Downlink Frequency Band Decoupling for Wireless Terminal Access
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Solution Overview
Problem
Wireless networks face challenges in effectively utilizing limited radio resources, particularly for uplink and downlink data transmission, due to differences in coverage and utilization rates between uplink and downlink frequency bands.
Innovation Solution
The method involves decoupling uplink and downlink frequency bands, allowing terminals to use different frequency bands for transmission based on network status, with the terminal selecting a lower frequency band for uplink to increase coverage and efficiently utilize radio resources, and potentially switching between bands to optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal uses the same frequency band for both uplink and downlink transmission, then the system configuration is simple, but the uplink coverage is limited and radio resource utilization is inefficient
Solution Approach 1:
The patent segments the uplink and downlink frequency bands, allowing them to operate in different frequency ranges. The terminal is configured to use a first frequency band for downlink reception and a second frequency band for uplink transmission, thereby expanding uplink coverage while maintaining manageable system complexity through separate band configurations.
Solution Approach 2:
The patent implements dynamic frequency band switching capability, where the terminal can switch between different uplink frequency bands (second and third frequency bands) based on network conditions and resource availability. This dynamic adaptation allows the system to optimize coverage and resource utilization without requiring complex static configuration.
2Reliability
If the terminal uses a lower frequency band for uplink transmission, then the uplink coverage is increased, but the radio resource utilization becomes imbalanced
Solution Approach 1:
The patent enables dynamic switching between different uplink frequency bands based on real-time network conditions. The terminal can switch from the second frequency band (lower frequency, better coverage) to the third frequency band (higher frequency, better resource utilization) when appropriate, thereby dynamically balancing coverage and resource utilization efficiency.
Solution Approach 2:
The patent changes the frequency band parameter dynamically based on network status and resource availability. By adjusting which frequency band is used for uplink transmission, the system can optimize both coverage (using lower frequencies when needed) and resource utilization (using higher frequencies when available), resolving the imbalance between these two objectives.
3Productivity
If the terminal switches between different frequency bands, then the radio resource utilization is optimized, but the system complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the network provides configuration information to the terminal about available frequency bands and switching conditions. The terminal uses this feedback to make informed switching decisions, reducing the complexity of the switching mechanism while still achieving optimized resource utilization through controlled, feedback-driven band selection.
Data Source
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AI summary
Embodiments of this application relate to the field of wireless communications technologies, and provide an access method, a switch method, and an apparatus. The access method includes: receiving, by a terminal, a system message via a downlink carrier, where the system message includes information used to indicate a frequency channel number of a second uplink carrier; and initiating, by the terminal, random access via the second uplink carrier; where a frequency channel number of the downlink carrier belongs to a first frequency band, and a frequency channel number of the second uplink carrier belongs to a second frequency band. In this method, when the terminal A is accessed to a base station, an uplink frequency band and a downlink frequency band of the terminal A may be different, so that appropriate frequency band resources may be selected, based on an actual network status, for uplink transmission and downlink transmission, thereby effectively utilizing the radio resources.