Uplink Resource Allocation via Interference Symbol Segmentation
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Solution Overview
Problem
In wireless communication systems, existing methods for allocating uplink resources fail to effectively manage interference, leading to degraded uplink throughput and increased block error rates due to differing resource settings between cells, which affects the reception performance of uplink data.
Innovation Solution
A method and apparatus for a base station to identify allocatable resource regions based on interference strength, where resources are dynamically allocated by distinguishing between interference symbols and non-interference symbols, allowing for the transmission of uplink data on symbols with lower interference, thereby improving reception performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink resources are allocated without considering interference strength, then resource allocation is simple and fast, but uplink reception performance degrades and block error rates increase
Solution Approach 1:
The patent segments the uplink resource region into multiple symbol-level resource regions based on interference strength. The base station identifies interference symbols (where neighboring cells transmit uplink signals) and non-interference symbols, then allocates resources accordingly. This segmentation allows the system to achieve symbol-level precision in resource allocation, resolving the contradiction between simple allocation and reliable reception by dividing the resource space into manageable interference-based segments.
Solution Approach 2:
The patent applies local quality by differentiating resource allocation strategies based on local interference characteristics. Instead of uniform allocation, the system identifies specific symbols with strong interference from neighboring cells and applies different allocation rules to those regions versus non-interference regions. This localized approach optimizes reception performance in high-interference areas while maintaining efficiency in low-interference areas, balancing reliability and complexity.
2Productivity
If resources are allocated without distinguishing interference symbols, then allocation process is simple, but uplink throughput decreases due to interference
Solution Approach 1:
The patent implements preliminary action by having the base station identify and classify symbols as interference or non-interference before actual resource allocation occurs. The base station预先 (in advance) determines which symbols in the uplink resource region correspond to neighboring cell transmissions and marks those as interference symbols. This preliminary identification enables the scheduler to avoid allocating resources to interference symbols, thereby preventing throughput degradation before it occurs.
Solution Approach 2:
The system employs feedback mechanisms where the base station continuously monitors uplink signal characteristics and interference patterns. Based on this feedback, the base station dynamically identifies interference symbols and adjusts resource allocation in real-time. The feedback loop allows the system to learn which symbols experience strong interference and adapt future allocations accordingly, maximizing throughput while managing the complexity of continuous monitoring and adaptation.
3Reliability
If dynamic resource allocation based on interference strength is implemented, then reception performance improves, but allocation time and processing delay increase
Solution Approach 1:
The patent applies partial action by focusing interference analysis and resource differentiation only on the most critical symbols where interference occurs, rather than uniformly processing all symbols. The base station identifies and handles only the interference symbols specially, while applying simpler allocation rules to non-interference symbols. This selective approach achieves the necessary reception performance improvement without the excessive processing time that would result from analyzing every symbol equally.
Data Source
AI summary
A device of a base station may comprise memory storing instructions; a transceiver; and a processor. The instructions, when executed by the processor, may cause the device to: receive, uplink signals within symbols of a first slot; obtain an interference strength of a symbol that has an index usable for transmission of a sounding reference signal (SRS) on a neighbor cell from among the symbols of the first slot; determine, as time resources for uplink data to be transmitted from a user equipment (UE) within a second slot, at least one symbol respectively having at least another index distinct from the index from among symbols of the second slot; and transmit, to the UE, downlink control information indicating the at least one symbol from among the symbols of the second slot as the time resources for the uplink data to be transmitted within the second slot.