PUSCH Resource Determination in 5G Uplink Sub-band
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Solution Overview
Problem
In the context of 5G NR Release 18, the frequency domain resource allocation information in RAR UL grants or DCIs scrambled with TC-RNTI cannot indicate the PUSCH transmitted in the uplink sub-band, preventing its implementation.
Innovation Solution
A method for determining the frequency domain resource location of a Physical Uplink Shared Channel (PUSCH) based on the starting Resource Block (RB) location of the uplink sub-band, the activated uplink Bandwidth Part (active UL BWP), and the initial uplink Bandwidth Part (initial UL BWP), applicable to both PUSCH scheduled by RAR and DCI scrambled by TC-RNTI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequency domain resource allocation information in RAR UL grant or DCI scrambled with TC-RNTI is used, then PUSCH can be scheduled, but the PUSCH cannot be transmitted in the uplink sub-band
Solution Approach 1:
The patent modifies the frequency domain resource allocation parameters by introducing an offset mechanism. The terminal determines the PUSCH frequency domain resource location by adding an offset to the resource block indication in the RAR UL grant or DCI, where the offset is derived from the difference between the uplink sub-band starting RB and the active UL BWP starting RB. This parameter change enables PUSCH transmission in the uplink sub-band while maintaining accurate frequency domain resource allocation.
2Ease of operation
If the frequency domain resource allocation is based on active UL BWP, then resource allocation is straightforward, but it cannot indicate PUSCH in uplink sub-band when uplink sub-band starting RB is different from active UL BWP starting RB
Solution Approach 1:
The patent introduces an offset value as an intermediary element between the active UL BWP resource allocation and the uplink sub-band resource indication. This offset acts as a mediator that translates the resource block indication from the active UL BWP context to the uplink sub-band context, enabling flexible PUSCH transmission while maintaining the simplicity of the existing resource allocation mechanism.
3Adaptability or versatility
If PUSCH transmission in uplink sub-band is implemented, then adaptability is improved, but the complexity of resource determination increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and configuring the offset value before PUSCH transmission. The network side determines the offset based on the uplink sub-band configuration and provides it to the terminal through RAR or DCI. This preliminary preparation simplifies the terminal's resource determination process during actual transmission, as the terminal only needs to apply the pre-provided offset to the resource block indication rather than performing complex calculations.
Data Source
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AI summary
The present disclosure provides a resource determination method, device, terminal, and network-side equipment to address the problem in the prior art where the frequency domain resource allocation information in the RAR UL grant or TC-RNTI scrambled DCI cannot indicate the PUSCH transmission within the uplink sub-band, thereby failing to achieve such PUSCH transmission. The method includes: determining the frequency domain resource location of the Physical Uplink Shared Channel (PUSCH) based on at least one of the starting Resource Block (RB) location of the uplink sub-band, the starting RB location of the activated uplink Bandwidth Part (active UL BWP), and the starting RB location of the initial uplink Bandwidth Part (initial UL BWP). Here, the PUSCH may either be scheduled by a Random Access Response (RAR) or by Downlink Control Information (DCI) scrambled by a Temporary Cell-Radio Network Temporary Identifier (TC-RNTI).