Dynamic Reference Cell Selection for Wireless Collision Handling
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Solution Overview
Problem
Current 5G wireless communication systems face challenges in efficiently managing uplink and downlink transmissions across multiple cells, leading to potential collisions and reduced system flexibility and reliability.
Innovation Solution
A method where user equipment (UE) and base stations determine a reference cell for symbol configuration, allowing for flexible allocation of frequency-domain resources for either uplink or downlink transmissions, even if the symbol is initially configured for the opposite, enhancing directional collision handling and system flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple cells are configured for a UE with fixed uplink/downlink assignments, then resource allocation is simplified, but system flexibility and collision handling capability deteriorate
Solution Approach 1:
The patent implements dynamic reference cell selection where the reference cell can change based on symbol index and collision scenarios. Instead of fixed uplink/downlink assignments, the system dynamically determines whether to prioritize uplink or downlink based on the specific symbol and cell configuration, enabling flexible adaptation to varying traffic conditions while maintaining manageable complexity through standardized selection rules.
Solution Approach 2:
The patent changes the parameter of reference cell identification from a static configuration to a dynamic one that varies with symbol index. The reference cell is determined by evaluating multiple cells and selecting based on specific criteria (such as lowest cell index or specific cell configuration) for each symbol, allowing the system to adapt resource allocation without increasing overall management complexity.
2Reliability
If uplink and downlink resources are strictly separated by cell configuration, then transmission reliability is improved, but collision handling capability and resource utilization deteriorate
Solution Approach 1:
The patent segments the resource allocation decision-making process by cell index and symbol index. Each cell can have its own reference cell determination rules, and the reference cell may differ for different symbols. This segmentation allows strict resource separation to be maintained where needed while enabling flexible collision handling in specific segments, thereby improving both reliability and resource utilization.
Solution Approach 2:
The patent introduces an intermediary reference cell determination mechanism that mediates between uplink and downlink resource conflicts. When collisions occur, the system uses the reference cell (determined through specific selection criteria) as an intermediary to resolve the conflict, allowing the system to maintain transmission reliability through structured decision-making while improving resource utilization by avoiding unnecessary resource wastage.
3Adaptability or versatility
If reference cell determination follows fixed rules, then device complexity is reduced, but adaptability to collision scenarios and system flexibility deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-defining reference cell selection criteria and collision handling rules before actual resource allocation occurs. The system pre-establishes the methodology for determining reference cells based on cell indices, symbol indices, and collision scenarios, reducing runtime complexity while maintaining high adaptability. The predetermined rules enable quick decision-making during resource allocation without requiring complex real-time analysis.
Data Source
AI summary
The present disclosure discloses a method and device in a wireless communication system, the method including: receiving configuration information for configuring multiple cells for a terminal device; and determining a reference cell for a first symbol according to a tenth cell from the multiple cells, or determining the reference cell for the first symbol according to a cell other than the tenth cell from the multiple cells, wherein the first symbol is configured as uplink in the tenth cell and at least one frequency-domain resource in the tenth cell is for a downlink transmission; or the first symbol is configured as downlink in the tenth cell and at least one frequency-domain resource in the tenth cell is for uplink transmission. The present disclosure improves the flexibility and reliability of the wireless communication system.