LTE-NR Resource Scheduling for Interference Avoidance
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Solution Overview
Problem
Simultaneous LTE and NR communication in terminal devices is hindered by mutual interference between frequency bands, leading to conflicts and reduced transmission efficiency, as existing solutions like NR uplink transmission over LTE frequency bands in Carrier Aggregation scenarios are limited and do not fully address general scenarios with both LTE and NR services.
Innovation Solution
A method for resource scheduling where a terminal device determines available and unavailable resources based on interference levels and communicates this information to a network device, allowing the network to allocate non-interfering resources, thereby reducing interference and improving transmission efficiency across different communication modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If NR uplink transmission is performed over LTE frequency band to avoid interference, then interference between NR TX and LTE RX is avoided, but the solution is limited to Carrier Aggregation architecture and cannot handle general scenarios with both LTE and NR services
Solution Approach 1:
The patent extends the interference coordination mechanism from Carrier Aggregation-specific architecture to a universal solution applicable to both CA and non-CA scenarios. The terminal device determines unavailable resources based on interference relationships between LTE and NR communications, and the network device allocates resources accordingly, making the solution architecture-agnostic and universally applicable to all LTE-NR coexistence scenarios
2Adaptability or versatility
If terminal device supports both LTE and NR communications simultaneously, then communication versatility is improved, but mutual interference between frequency bands occurs reducing transmission efficiency
Solution Approach 1:
The terminal device performs preliminary determination of unavailable resources by analyzing interference relationships between LTE and NR frequency bands before resource allocation. The network device receives this information and pre-configures resource allocation to avoid interference, preventing transmission efficiency degradation before it occurs rather than reacting after interference happens
Solution Approach 2:
The patent introduces an intermediary information exchange mechanism where the terminal device sends unavailable resource information to the network device, which then uses this information to allocate available resources. This intermediary communication layer coordinates between LTE and NR resource management, enabling simultaneous operation without direct interference
3Productivity
If resource allocation is performed without considering interference between communication modes, then resource utilization is maximized, but interference occurs between LTE and NR transmissions
Solution Approach 1:
The patent changes the resource allocation parameter from simple available/unavailable classification to a nuanced system where the terminal device provides detailed unavailable resource information including interference relationships. The network device uses this enriched parameter set to allocate resources that maximize utilization while avoiding interference, transforming the allocation decision from binary to multi-dimensional optimization
Data Source
AI summary
An embodiment of the application relates to a method, terminal device and network device for scheduling resources. The method comprises a terminal device determining a first resource, wherein the first resource is an available resource or an unavailable resource, the unavailable resource is a resource that the second resource interferes with, and/or that is capable of interfering with the second resource, the available resource is a resource other than the unavailable resource, and the second resource is used by the terminal device in a second communications mode to communicate with a second network; and the terminal device transmitting first resource information to the first network device, wherein the first resource information includes the first resource, the first resource information is used by the first network device to allocate resources to the terminal device, and the terminal device is used to communicate with the first network device in a first communications mode. The resource allocation method, terminal device and network device of the embodiment of the application enables the reduction or avoidance of interference.