Radio Base Station Resource Set Configuration for MU-MIMO Control
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Solution Overview
Problem
In next-generation radio communication systems like LTE-A, the shortage of downlink control channel capacity hinders the full utilization of MU-MIMO transmission performance, making it difficult to effectively notify user terminals of radio resources for enhanced downlink control channels.
Innovation Solution
A radio base station configures and notifies user terminals of resource sets for enhanced downlink control channels using frequency-division-multiplexed downlink shared data channels, specifying the pattern information and number of resource blocks, allowing the terminals to identify the allocated resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the downlink control channel capacity is extended to support more users in MU-MIMO transmission, then the system performance and data rate are improved, but the overhead for notifying resource configurations increases
Solution Approach 1:
The resource blocks for enhanced downlink control channel are divided into multiple resource sets, each identified by a resource set index. This segmentation allows the system to manage and notify resource allocations more efficiently by referencing pre-configured sets rather than individually notifying each resource block, thereby reducing notification overhead while supporting expanded control channel capacity
Solution Approach 2:
Resource sets are pre-configured and stored in the terminal before actual transmission. The base station notifies terminals of resource set indices rather than full resource configurations during each transmission. This preliminary configuration approach reduces the overhead for notifying resource allocations while enabling the system to support multiple users in MU-MIMO transmission
2Adaptability or versatility
If multiple resource blocks are allocated to enhanced downlink control channel for MU-MIMO support, then the system can handle more users, but the complexity of resource management increases
Solution Approach 1:
Multiple resource sets are configured to support different MU-MIMO transmission scenarios and user requirements. Each resource set can be independently configured and selected based on transmission needs, allowing the system to adapt to various user scenarios while maintaining a unified management framework through resource set indices, thus reducing management complexity
Solution Approach 2:
The enhanced downlink control channel resources are segmented into multiple resource sets, each manageable through a compact resource set index. This segmentation enables the system to support multiple users and scenarios while simplifying resource management through index-based referencing rather than direct management of individual resource blocks
Data Source
AI summary
In order to enable notification of radio resources that make up an enhanced downlink control channel, a radio base station that transmits downlink control information for a user terminal using an enhanced downlink control channel frequency-division-multiplexed with a downlink shared data channel is provided. The radio base station includes a configuring section that configures the user terminal with a resource set including a plurality of resource blocks allocated to the enhanced downlink control channel; and a notifying section that notify the user terminal of pattern information of the resource blocks that make up the resource set and information indicating a number (n) of resource blocks that make up the resource set.