Uplink Resource Block Set Determination in NR-U Random Access
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Solution Overview
Problem
In NR-U systems, terminal devices face challenges in determining the correct resource block set for uplink transmission during the random access procedure, leading to inconsistencies in uplink resource allocation between network devices and terminal devices.
Innovation Solution
A wireless communication method where a terminal device receives scheduling information from a network device to determine the appropriate resource block set for uplink channel transmission, using the scheduling information, an initial uplink bandwidth part, and physical random access channel resources for accurate allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a network device configures multiple RB sets for a terminal device in broadband resource configuration, then resource allocation flexibility is improved, but inconsistency in uplink resource allocation understanding between network device and terminal device occurs
Solution Approach 1:
The patent applies preliminary action by having the terminal device determine the first RB set for uplink channel transmission before actual transmission occurs. The terminal device uses the first scheduling information, initial uplink BWP, and first PRACH resource configuration to pre-determine which RB set to use, ensuring both the network device and terminal device have consistent understanding of the resource allocation before transmission begins. This prevents mismatches during actual uplink transmission.
2Productivity
If the terminal device determines RB set for uplink transmission during random access procedure, then uplink transmission capability is improved, but ambiguity in RB set selection arises
Solution Approach 1:
The patent applies feedback by using the first scheduling information sent by the network device as a reference for the terminal device to determine the first RB set. The first scheduling information contains resource allocation instructions that provide feedback from the network device to the terminal device, guiding the terminal device to select the correct RB set without ambiguity. This feedback mechanism ensures the terminal device's RB set selection aligns with network device expectations.
Solution Approach 2:
The patent uses the first scheduling information as an intermediary that mediates between the network device's resource allocation decisions and the terminal device's RB set selection. The first scheduling information, along with the initial uplink BWP and first PRACH resource configuration, serves as a common reference point that both devices use to arrive at the same RB set determination, eliminating ambiguity in the selection process.
Data Source
AI summary
Provided by the present invention is a wireless communication method, a terminal device, and a network device, wherein a terminal device receives first scheduling information sent by a network device, the first scheduling information being used for scheduling transmission of a first uplink channel by the terminal device by means of a first uplink bandwidth part BWP, the first uplink BWP comprising one or multiple resource block RB sets, and the first uplink BWP corresponding to a physical random access channel PRACH resource configuration; the terminal device determines transmission of the first uplink channel by means of a first frequency domain resource in a first RB set according to at least one among the first scheduling information, an initial uplink BWP, and a first PRACH resource in the PRACH resource configuration.