MsgA PUSCH Frequency Resource Configuration for eRedCap Random Access
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Solution Overview
Problem
The reduced bandwidth of evolved reduced capability (eRedCap) terminals in Release 18 limits the available frequency domain resources for MsgA PUSCH in two-step random access, necessitating a solution to ensure effective channel transmission within the baseband processing capability range while ensuring correct reception by the network device.
Innovation Solution
A method and apparatus for configuring frequency domain resources for eRedCap terminals, involving the reception and determination of target frequency domain resources based on configuration information, ensuring the MsgA PUSCH transmission within the terminal's baseband processing limits, and enabling correct network reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the bandwidth of eRedCap terminal is reduced to support low-data-rate services, then the cost and power consumption are reduced, but the available frequency domain resources for MsgA PUSCH transmission are reduced
Solution Approach 1:
The patent changes the parameter of subcarrier spacing configuration to resolve the contradiction. By supporting multiple subcarrier spacing configurations (15KHz and 30KHz) and allowing flexible selection based on channel conditions and terminal capabilities, the system can maintain reliable transmission even with reduced bandwidth. The network can configure appropriate subcarrier spacing to optimize the balance between resource availability and transmission reliability for eRedCap terminals.
2Ease of operation
If the subcarrier spacing is configured as 15KHz or 30KHz for eRedCap terminal, then the processing capability requirements are reduced, but the frequency domain resources available within bandwidth range are reduced
Solution Approach 1:
The patent introduces dynamic configurability of subcarrier spacing parameters. The network device can dynamically select and configure appropriate subcarrier spacing (15KHz or 30KHz) based on channel conditions, terminal capabilities, and resource availability. This dynamic adjustment allows the system to adapt processing requirements to match terminal capabilities while optimizing frequency domain resource utilization for MsgA PUSCH transmission.
3Device complexity
If the bandwidth is reduced for eRedCap terminal support, then the device complexity and cost are reduced, but the frequency domain resources for random access transmission are limited
Solution Approach 1:
The patent employs parameter change by introducing flexible subcarrier spacing configuration as a compensating mechanism. When bandwidth is reduced for eRedCap terminals, the system can adjust subcarrier spacing parameters to optimize the use of available frequency domain resources. This allows simpler terminal designs with reduced bandwidth capabilities to still achieve reliable random access transmission by utilizing appropriate parameter configurations.
Data Source
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AI summary
Disclosed in embodiments of the present disclosure are a frequency domain resource configuration method and apparatus. The method comprises: receiving configuration information sent by a network device, the configuration information being used for configuring frequency domain resources of a random access message (MsgA) physical uplink shared channel (PUSCH) in two-step random access; determining a target frequency domain resource according to the configuration information; and sending the MsgA PUSCH to the network device by using the target frequency domain resource, so that the transmission of an uplink channel in the two-step random access can be carried out within the baseband processing capability range of a reduced capability terminal device, and meanwhile, the network device can be ensured to correctly receive, thereby effectively improving the channel transmission performance and ensuring the reliability of communication transmission.