Random Access Uplink Allocation for eRedCap Terminal Bandwidth Limits
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Solution Overview
Problem
In future wireless communication systems like NR release 18 and 6G, eRedCap terminals face challenges due to restricted baseband processing capability, leading to potential failures in resource allocation.
Innovation Solution
A terminal is designed with a reception unit to receive a downlink shared channel, a control unit to determine an uplink shared channel resource based on the random access response, and a transmission unit to transmit using the determined resource, while reducing peak rate and bandwidth for proper resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If baseband processing capability is restricted for eRedCap terminals, then device complexity and power consumption are reduced, but resource allocation reliability deteriorates
Solution Approach 1:
The patent changes the parameter of random access response bandwidth from the standard wide bandwidth to a reduced bandwidth (e.g., 60 resource blocks instead of 200+). This parameter change allows eRedCap terminals with restricted baseband processing capability to successfully receive and process the random access response, thereby maintaining resource allocation reliability while respecting the terminal's capability constraints.
2Use of energy by moving object
If peak rate is reduced for capability-reduced terminals, then power consumption and device complexity are lowered, but communication productivity decreases
Solution Approach 1:
The patent applies local quality by providing differentiated bandwidth allocation specifically for the random access response channel targeted at eRedCap terminals. While the overall system maintains high data rates for normal terminals, eRedCap terminals receive a locally optimized, reduced bandwidth allocation that matches their processing capability, enabling them to communicate effectively without requiring high peak rates across all channels.
3Ease of operation
If bandwidth for random access is reduced, then resource allocation becomes more manageable for capability-reduced terminals, but the quantity of available resources decreases
Solution Approach 1:
The patent segments the random access response resources into different bandwidth allocations: a reduced bandwidth segment (e.g., 60 resource blocks) for eRedCap terminals and a full bandwidth segment for normal terminals. This segmentation allows capability-reduced terminals to easily process their allocated resources without being overwhelmed by the full bandwidth, while the overall system retains sufficient resources for high-performance terminals.
Data Source
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AI summary
A terminal includes: a reception unit configured to receive a downlink shared channel that carries a random access response from a base station; a control unit configured to determine a resource of an uplink shared channel that carries an Msg3, based on a resource allocation of an uplink shared channel included in the random access response; and a transmission unit configured to transmit the uplink shared channel by using the determined resource of the uplink shared channel to the base station. The control unit reduces a peak rate and reduces a band related to random access.