Dynamic Time Offset for Uplink Resource Allocation
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Solution Overview
Problem
Current UMTS LTE systems experience time delays in allocating uplink resources and reporting channel quality, as the timing of uplink transmission is fixed and does not account for channel quality report requirements, leading to inefficiencies in resource utilization and increased latency.
Innovation Solution
The method involves a primary station transmitting a first indication of a transmission resource to a secondary station, which includes a second indication for channel quality reporting, allowing a variable time offset based on whether a report is requested, enabling sufficient time for quality measurement and inclusion in uplink transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a fixed time offset is used for uplink transmission from receiving L1/L2 downlink control information, then the transmission timing is simple and deterministic, but insufficient time may be available for channel quality measurement when a report is requested
Solution Approach 1:
The patent applies dynamics by making the time offset variable rather than fixed. The time offset between receiving L1/L2 downlink control information and uplink transmission is adjusted based on whether a channel quality report is requested. When a report is requested, a larger time offset is used to allow sufficient measurement time; when not requested, a smaller time offset minimizes latency. This dynamic adjustment resolves the contradiction between minimizing time loss and ensuring reliable channel quality reporting.
Solution Approach 2:
The patent changes the time offset parameter based on the channel quality report requirement. By modifying this temporal parameter dynamically according to the reporting need, the system optimizes both the speed of resource allocation and the accuracy of channel quality measurements, resolving the contradiction between fast transmission and reliable measurement.
2Measurement precision
If channel quality measurement time is extended to ensure accurate reporting, then measurement accuracy improves, but transmission latency increases
Solution Approach 1:
The system dynamically adjusts the time offset based on whether channel quality reporting is needed. When reporting is required, the extended time offset ensures accurate measurement; when not required, the reduced time offset minimizes latency. This conditional dynamic adjustment resolves the contradiction between measurement precision and transmission speed.
Solution Approach 2:
The time offset parameter is changed conditionally based on the channel quality report requirement. This parameter adjustment allows the system to optimize measurement accuracy when needed and minimize latency when not needed, resolving the contradiction between these two opposing requirements.
3Device complexity
If resource allocation follows a fixed timing structure, then system complexity is reduced, but resource utilization efficiency decreases due to inability to adapt to channel conditions
Solution Approach 1:
The patent introduces dynamic timing adjustment into the resource allocation process while maintaining overall structural simplicity. By varying only the time offset parameter based on reporting requirements, the system achieves adaptive resource utilization without significantly increasing structural complexity, thus resolving the contradiction between simplicity and efficiency.
Solution Approach 2:
The system optimizes resource allocation efficiency by changing the time offset parameter based on channel quality reporting needs. This parameter-based adaptation allows flexible resource utilization while keeping the allocation structure simple, resolving the contradiction between device complexity and productivity.
Data Source
AI summary
The invention relates to a method for allocating resources for transmissions from a secondary station to a primary station, wherein the primary station transmits to the secondary station a first indication of a transmission resource for use by the secondary station for transmitting data to the primary station, wherein the indication of the transmission resource indicates at least one selected transmission resource out of a set of transmission resources and further comprises a second indication which may request that the secondary station sends a report of the downlink channel quality using at least part of the selected transmission resource and that a time offset of the selected transmission resource from the first indication depends on whether the second indication requests a channel quality report.