Uplink Response Signal Resource Allocation in Carrier Aggregation
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Solution Overview
Problem
In LTE-Advanced systems with carrier aggregation, there is a deficiency of resources for transmitting uplink response signals when using secondary component carriers, leading to insufficient resources for accurate feedback.
Innovation Solution
The base station allocates additional resources based on the number of transmission blocks in secondary component carriers, allowing mobile stations to use preconfigured and extra resources for transmitting uplink response signals without compromising single carrier properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is used in LTE-Advanced systems to increase data transmission capacity, then the system throughput and spectral efficiency are improved, but the number of uplink response signal resources becomes insufficient
Solution Approach 1:
The patent segments the response signal transmission by dividing it into two parts: preconfigured resources for primary component carriers and dynamically allocated resources for secondary component carriers. This segmentation allows the system to scale resources according to the number of activated component carriers, resolving the contradiction between maintaining high throughput via carrier aggregation and having sufficient response signal resources.
Solution Approach 2:
The patent introduces dynamic resource allocation where the base station allocates additional uplink response signal resources based on the actual number of activated secondary component carriers. This dynamic adjustment ensures that resources are optimized according to real-time system needs, allowing the system to maintain high productivity when multiple carriers are active while preventing resource waste when fewer carriers are used.
2Quantity of substance
If additional resources are allocated for uplink response signals in carrier aggregation, then the resource sufficiency is improved, but the system complexity increases
Solution Approach 1:
The patent applies preliminary action by preconfiguring a baseline set of uplink response signal resources that are always available for primary component carriers. This preliminary configuration simplifies the system design by establishing a stable foundation, while dynamic allocation is only activated when secondary component carriers are actually used, thus minimizing overall system complexity.
Solution Approach 2:
The system implements self-service through autonomous resource allocation where the base station automatically determines and allocates additional resources based on the number of activated secondary component carriers without requiring complex manual configuration. This self-adjusting mechanism reduces system complexity by eliminating the need for elaborate resource management protocols.
3Quantity of substance
If channel selection method is used to transmit response signals in LTE TDD system, then the resource utilization is improved, but the measurement precision of response signal accuracy deteriorates due to resource insufficiency
Solution Approach 1:
The patent changes the parameter of resource quantity by introducing dynamic resource allocation based on the number of activated component carriers. This parameter change ensures that sufficient resources are always available for accurate response signal transmission, eliminating the need for channel selection methods that compromise feedback accuracy while maintaining high resource utilization through adaptive allocation.
Data Source
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AI summary
A method for transmitting uplink response signals, base station, mobile station and communication system. Wherein the method comprises: judging whether to use a downlink secondary component carrier to transmit data to a mobile station; if the judging result is positive, allocating resources according to the number of transmission blocks for transmitting the downlink data in the secondary component carrier, such that the mobile station is able to use the resources corresponding to a preconfigured primary component carrier and the resources allocated to the secondary component carrier to select uplink resources for transmitting response signals. In case of insufficient resources, the base station allocates extra resources according to a number of transmission blocks (TBs) for transmitting data, such that the mobile station may feed back response signals by using preconfigured resources and the extra allocated resources and feed back the response signals at a relatively low cost, which solves the problem of insufficient resources in the prior art.