Dynamic Resource Allocation for Aperiodic CSI in Multi-Carrier LTE
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Solution Overview
Problem
In LTE and LTE-A systems, the allocation of resources for aperiodic CSI transmission is insufficient when multiple downlink carriers are used, leading to potential errors in UCI reception and limitations in data transmission scheduling.
Innovation Solution
The base station dynamically allocates resources based on the number of relevant downlink carriers for aperiodic CSI, ensuring flexible resource allocation and supporting the transmission of UCI across multiple carriers by adjusting the maximum number of resource blocks allocated to the UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station allocates a fixed maximum of four resource blocks for UCI transmission, then the resource allocation is simple and manageable, but the resources become insufficient when multiple downlink carriers are used, leading to potential errors in UCI reception
Solution Approach 1:
The patent implements dynamic resource block allocation for UCI transmission based on the number of downlink carriers. The base station determines the number of resource blocks to allocate by referencing a predefined table that maps the number of downlink carriers to specific resource block quantities. This dynamic adjustment ensures sufficient resources for reliable UCI reception across multiple carriers while maintaining manageable allocation through standardized tables.
2Quantity of substance
If the base station allocates more resource blocks to support multiple downlink carriers, then the UCI transmission capacity increases, but the resource allocation becomes more complex and the scheduling flexibility decreases
Solution Approach 1:
The patent changes the parameter of resource block allocation from a fixed value to a variable determined by the number of downlink carriers. By establishing a correspondence relationship (table) between the number of downlink carriers and resource block quantities, the system automatically adjusts resource allocation parameters based on network conditions, thereby increasing UCI transmission capacity while maintaining scheduling flexibility through standardized parameter mapping.
3Productivity
If the base station uses a fixed resource allocation scheme, then the scheduling is simple and fast, but it cannot adapt to different numbers of downlink carriers, limiting the system's versatility
Solution Approach 1:
The patent performs preliminary action by pre-defining a correspondence table between the number of downlink carriers and the number of resource blocks for UCI transmission. This pre-prepared mapping allows the base station to quickly determine resource allocation without complex real-time calculations, thereby maintaining high scheduling efficiency while achieving adaptability to different numbers of downlink carriers through the pre-configured parameter relationships.
Data Source
AI summary
A method for resource allocation, method for channel state information transmission, base station and user equipment. Wherein the method for resource allocation includes: determining, by a base station, that it is necessary for a UE to report aperiodic CSI of relevant downlink CCs; and allocating, by the base station, corresponding resources to the UE according to the number of the relevant downlink CCs. The base station allocates corresponding resources to the UE in accordance with the number of relevant downlink CCs, resource allocation is flexible, and the transmission of UCI in case of multiple carriers is supported.