Sub-frame Resource Allocation for Cross-Interference Mitigation
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Solution Overview
Problem
In wireless communication systems, the coexistence of TD-LTE and TD-LTE-Pro/5G systems with different sub-frame lengths leads to cross timeslot interference, degrading system performance and user experience due to asynchronous sub-frames.
Innovation Solution
A resource allocation method that determines the necessity of preferential transmission for sub-frames based on configuration parameters, aligns transmission directions, and prohibits specific OFDM symbols to prevent interference between systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If sub-frames of different lengths are used in coexistent wireless communication systems, then system evolution and shorter delay are achieved, but cross timeslot interference occurs between systems
Solution Approach 1:
The network device performs preliminary determination based on configuration parameters to identify whether preferential transmission needs to be ensured for the first sub-frame. This advance identification allows the system to proactively align transmission directions or prohibit specific OFDM symbols before interference occurs, preventing cross-timeslot interference between coexistent wireless communication systems while maintaining shorter sub-frame delays
2Reliability
If transmission direction alignment is performed for sub-frames, then cross-interference to the first sub-frame is prevented, but transmission flexibility is reduced
Solution Approach 1:
The network device applies transmission direction alignment selectively only to specific OFDM symbols within sub-frames where cross-interference would occur, rather than uniformly to all symbols. This localized approach ensures transmission stability for affected symbols while preserving transmission flexibility for other symbols that do not require alignment, thus resolving the contradiction between reliability and adaptability
3Reliability
If OFDM symbols are prohibited from transmission to prevent interference, then system operation stability is improved, but resource utilization efficiency decreases
Solution Approach 1:
The network device extracts and identifies only the specific OFDM symbols that cause or suffer from cross-timeslot interference based on configuration parameter analysis. By prohibiting transmission only for these extracted problematic symbols rather than entire sub-frames, the system maintains operational stability while minimizing the impact on overall resource utilization efficiency
Data Source
AI summary
A resource allocation method, a computer program product and a communication device are disclosed. The method includes: determining, based on a configuration parameter of a first sub-frame, whether preferential transmission of the first sub-frame needs to be ensured, wherein the first sub-frame refers to a sub-frame in a first wireless communication system; defining a transmission direction of a second sub-frame which exerts cross-interference to the first sub-frame to be the same as that of the first sub-frame if preferential transmission of the first sub-frame needs to be ensured, wherein the second sub-frame refers to a sub-frame in a second wireless communication system; and defining OFDM symbols in the first sub-frame which exert cross-interference to the second sub-frame to be transmission prohibited if preferential transmission of the first sub-frame does not need to be ensured.