EPDCCH Spatial Multiplexing in Data Region
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Solution Overview
Problem
In wireless communication systems, the limited resources of the control region reduce the available resources for data transmission, limiting system capacity, especially in systems capable of transmitting data to multiple users, necessitating a method to enhance control channel resources.
Innovation Solution
The implementation of an enhanced physical downlink control channel (EPDCCH) in the data region using spatial division multiplexing, where user equipment receives and decodes downlink control information through EPDCCH sets configured with enhanced control channel elements (ECCEs) defined by a radio network temporary identifier, subframe index, and aggregation level, allowing for blind decoding in a UE-specific search space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If control channels are transmitted in the control region, then control channel resources are provided, but system capacity is limited due to reduced data region resources
Solution Approach 1:
The patent moves control channel transmission from the traditional control region (time dimension) to the data region (spatial dimension), allowing control channels to be transmitted alongside data channels without reducing data transmission resources. This dimensional shift enables simultaneous control and data transmission, resolving the resource allocation conflict.
Solution Approach 2:
The patent merges control channel transmission with data region resources, allowing both control information and data to share the same time-frequency resources through spatial division multiplexing. This combining approach eliminates the need to separate control and data regions, thereby increasing overall system capacity while maintaining control channel functionality.
2Quantity of substance
If control region resources are increased, then control channel capacity is enhanced, but available data transmission resources are reduced
Solution Approach 1:
The patent relocates control channel transmission to the data region, utilizing the spatial dimension for control channel allocation instead of the traditional control region. This allows control channels to be transmitted within the data region using spatial division multiplexing, thereby increasing control channel resources without reducing data region area.
Solution Approach 2:
The patent introduces dynamic resource allocation where control channels can be flexibly configured within the data region based on system conditions. The search space configuration and resource block allocation are dynamically adjusted to balance control channel needs with data transmission requirements, allowing adaptive optimization of both control and data resources.
3Quantity of substance
If spatial division multiplexing is used for control channels in data region, then control channel resources are increased, but device complexity increases
Solution Approach 1:
The patent changes key parameters such as aggregation level, resource block allocation, and search space configuration to optimize control channel transmission in the data region. By adjusting these parameters dynamically based on channel conditions and system load, the patent achieves efficient control channel resource utilization while managing complexity through standardized parameter sets and configuration procedures.
Data Source
AI summary
The disclosure is related to reception and configuration of a downlink control channel. Particularly, the present disclosure relates to a method and an apparatus (e.g., user equipment) for receiving a downlink control channel located in a data region, and a method and an apparatus (e.g., a transmission/reception point) for configuring and transmitting the downlink control channel.