Enhanced Physical Downlink Control Channel Resource Adaptation
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Solution Overview
Problem
Existing communication systems face challenges in efficiently configuring regions for control channels, leading to suboptimal resource utilization and limited capacity for control channels, which restricts the number of mobile stations that can be supported.
Innovation Solution
A base station apparatus and mobile station apparatus that utilize an enhanced physical downlink control channel, configured using a controller to set the number of first elements based on the format of downlink control information, allowing for efficient transmission and reception of control information by dynamically adjusting resource block pairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed number of first elements is used for the enhanced physical downlink control channel, then the configuration is simple, but the resource utilization is suboptimal and the system capacity is limited
Solution Approach 1:
The patent implements dynamic adaptability by allowing the number of first elements (M) in the enhanced physical downlink control channel to be varied based on the format of downlink control information. The base station can select from multiple possible sets of M values depending on the specific DCI format being transmitted, enabling the control channel capacity to adapt to different communication scenarios and support more mobile stations without requiring a completely reconfigurable system structure.
2Productivity
If resource block pairs are statically allocated for control channels, then the configuration is straightforward, but the resource utilization efficiency is low
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the number of first elements (M) based on the DCI format. Different DCI formats have different information payloads, and the system selects appropriate M values from predefined sets to match the information size. This allows resource block pairs to be efficiently utilized by matching the control channel size to the actual information transmission needs, improving resource utilization efficiency while maintaining manageable allocation complexity through predefined parameter sets.
Data Source
AI summary
The present invention enables efficient transmission/reception of a signal including control information between a base station apparatus and a mobile station apparatus. To realize this, there are provided a receiver configured to receive an enhanced physical downlink control channel from the base station apparatus; a setting unit configured to be able to set, using at least a format of downlink control information included in the received enhanced physical downlink control channel, one of a plurality of possible sets of M, M being the number of first elements that constitute the enhanced physical downlink control channel; and a monitoring unit configured to monitor a search region in which the enhanced physical downlink control channel obtained on the basis of the set possible set of M is possibly mapped.