Uplink Bandwidth Part Configuration for TDD Resource Efficiency
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Solution Overview
Problem
In future radio communication systems, the insufficient uplink resources compared to downlink resources lead to degradation in system performance, including increased latency and coverage issues, due to the lack of effective methods for increasing uplink resources in existing NR specifications.
Innovation Solution
A terminal and radio communication method that includes a receiving section for RRC information related to BWP configuration for frequency division multiplexing on uplink and downlink resources in a TDD band, with a control section to manage the configuration, application, and switching of uplink BWP, enabling efficient resource utilization by overlapping DL and UL resources in a component carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional TDD resource allocation is used, then downlink resources are sufficient, but uplink resources become insufficient leading to increased latency and coverage degradation
Solution Approach 1:
The patent applies dynamic BWP switching to adaptively allocate uplink resources. The terminal switches between different uplink BWPs based on traffic conditions and network configuration, enabling flexible resource utilization. This dynamic adjustment allows the system to provide sufficient uplink resources when needed while maintaining efficient downlink operation, thereby resolving the contradiction between uplink resource quantity and system performance reliability.
Solution Approach 2:
The patent changes the bandwidth parameter by configuring multiple BWPs with different bandwidths. The network can dynamically adjust the active BWP bandwidth based on traffic demands, transforming the fixed resource allocation into a variable parameter that adapts to changing conditions. This parameter change enables the system to optimize the balance between uplink resource availability and overall system performance.
2Speed
If uplink resources are increased to reduce latency, then communication speed improves, but resource usage efficiency decreases due to insufficient control methods
Solution Approach 1:
The patent implements feedback mechanisms where the terminal reports uplink resource requirements and traffic conditions to the network. Based on this feedback, the network dynamically adjusts BWP configurations to optimize resource allocation. This feedback loop enables the system to increase communication speed when needed while maintaining high resource usage efficiency by avoiding unnecessary resource reservation during low-traffic periods.
Solution Approach 2:
The dynamic BWP switching mechanism allows the system to adaptively adjust uplink resource allocation based on real-time traffic conditions. When traffic demand increases, the system dynamically switches to wider BWPs to increase communication speed. When traffic is light, the system switches to narrower BWPs to improve resource usage efficiency, thus resolving the contradiction between speed and productivity.
3Productivity
If frequency division multiplexing is implemented in TDD band, then resource usage efficiency increases, but system complexity increases due to configuration and switching requirements
Solution Approach 1:
The patent segments the frequency spectrum into multiple BWPs, each with specific bandwidths and configurations. This segmentation allows the system to manage complex resource allocation by dividing the overall resource pool into manageable segments. The terminal and network only need to configure and switch between these predefined segments rather than managing all resources individually, thereby reducing the practical complexity despite the advanced multiplexing technique.
Solution Approach 2:
The patent employs preliminary configuration of multiple BWPs before actual communication begins. The network pre-configures various BWP parameters including bandwidth, frequency location, and timing information. This preliminary action eliminates the need for complex real-time calculations and configurations during active communication, reducing operational complexity while maintaining high resource usage efficiency through frequency division multiplexing.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes: a receiving section that receives a Radio Resource Control (RRC) information element related to a bandwidth part (BWP) configuration in a duplex method of performing frequency division multiplexing on an uplink (UL) resource and a downlink (DL) resource in one component carrier in a time division duplex (TDD) band; and a control section that controls at least one of configuration, application, activation, and switching of a UL BWP, based on the RRC information element. According to one aspect of the present disclosure, it is possible to increase resource usage efficiency.