NR IAB Resource Multiplexing via Symbol-Level Segmentation
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Solution Overview
Problem
The existing methods for determining a set of available symbols in an NR JAB system are not suitable due to differences in power amplifier on/off time, symbol duration, and resource configuration granularity compared to LTE relay systems.
Innovation Solution
A resource multiplexing method that involves a first node determining the time domain position of a first resource and deriving the time domain positions of second resources based on guard interval information, which includes quantities of guard symbols during resource switching, to accurately determine available symbols in the NR JAB system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resource configuration at symbol granularity is used in NR JAB system, then resource utilization is improved, but device complexity increases due to shorter power amplifier on/off time and shorter symbol duration
Solution Approach 1:
The resource configuration is segmented at the symbol level rather than slot level, allowing independent control of each symbol's resource allocation. This enables fine-grained resource management where each symbol can be dynamically assigned to MT or DU resources, improving resource utilization while managing complexity through structured segmentation of the resource grid.
Solution Approach 2:
The system dynamically adjusts resource allocation based on real-time requirements, with the first node determining time domain positions of MT and DU resources adaptively. The guard interval information is dynamically calculated based on switching requirements between MT and DU resources, allowing the system to respond to changing traffic conditions while maintaining efficient resource utilization.
2Reliability
If guard interval information is added to account for switching time, then transmission reliability is improved, but resource overhead increases
Solution Approach 1:
The first node determines and communicates guard interval information in advance before actual resource switching occurs. This preliminary action allows the second node to prepare for upcoming resource switches, ensuring reliable transmission by preventing interference from previous transmissions. The guard intervals are calculated and signaled proactively rather than reactively.
Solution Approach 2:
The system changes the parameter of resource allocation from fixed slot-level to flexible symbol-level with dynamic guard intervals. The guard interval duration is adjusted based on the specific switching requirements between MT and DU resources, optimizing the balance between reliability (sufficient guard time) and resource efficiency (minimal overhead).
Data Source
AI summary
A resource multiplexing method and apparatus are provided, to determine a set of available symbols in an NR IAB system. A first node determines a time domain position of a DU resource of a communications device, and determines a time domain position of an MT resource of the communications device based on the time domain position and a type of the DU resource and guard interval information. Alternatively, a first node determines a time domain position of an MT resource of a communications device, and determines a time domain position of a DU resource of the communications device based on the time domain position and a type of the MT resource and guard interval information.