RNTI Scrambling for Flexible 5G DCI Resource Allocation
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Solution Overview
Problem
In 5G New Radio systems, determining a reference point for the starting position of a channel to optimize resource allocation and reduce latency is challenging, as existing methods either uniformly distribute possible positions within a time slot or increase control signaling overhead.
Innovation Solution
A method using Radio Network Temporary Identity (RNTI) for scrambling Downlink Control Information (DCI) to dynamically configure resource tables with different reference points for channel transmission, allowing flexible allocation of resources based on service types without increasing DCI overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If uniform distribution of possible starting positions within a time slot is used, then resource allocation flexibility is improved, but control signaling overhead increases
Solution Approach 1:
The patent extracts the reference point indication from the DCI content by using different RNTI values to represent different reference points. This removes the need for explicit reference point signaling in the DCI, thereby reducing control signaling overhead while maintaining resource allocation flexibility.
Solution Approach 2:
The RNTI serves multiple functions: it not only identifies the terminal device but also indicates the reference point for time domain resource allocation. This multi-functionality eliminates the need for separate reference point indication, reducing DCI overhead while preserving allocation flexibility.
2Manufacturing precision
If explicit reference point indication is added to DCI, then resource allocation precision is improved, but DCI overhead increases
Solution Approach 1:
The patent changes the parameter used for reference point indication from explicit DCI fields to the RNTI value itself. By mapping different RNTI values to different reference points, the system achieves precise resource allocation without adding DCI overhead.
3Adaptability or versatility
If multiple resource tables with different reference points are configured, then service adaptability is improved, but device complexity increases
Solution Approach 1:
The terminal device automatically determines which resource table to use based on the RNTI value received in the DCI. This self-service mechanism eliminates the need for complex configuration management and switching logic, reducing device complexity while maintaining service adaptability.
Data Source
AI summary
Provided are a wireless communication method, terminal device, and network device, capable of scrambling a radio network temporary identifier (RNTI) of downlink control information (DCI) and thereby giving a terminal device a reference point for an initial position of a resource used by a flexible configuration channel, said method comprising: a terminal device receives DCI sent by a network device; according to an RNTI which scrambles said DCI, said terminal device determines, in at least one resource table, a resource used for a first channel, said at least one resource table containing at least two types of resources, the reference points of the initial positions of said at least two types of resources being different.