Periodic Mapping Pattern Extension Control Area Subframe
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Solution Overview
Problem
The increasing number of user equipment, including machine-type communications (MTC) terminals, leads to a shortage of control signals in 4G wireless communication systems, particularly due to the introduction of new techniques like MU-MIMO and CoMP, which require additional control signals and result in a potential reduction in throughput when trying to extend the control area.
Innovation Solution
A communication system and method that extend the control area within the data area of a radio frame using a periodic mapping pattern, allowing for the arrangement of control signals like N-PDCCH in the data area of subframes, thereby optimizing resource allocation and reducing throughput loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the control area is extended to accommodate more user equipment and new techniques like MU-MIMO and CoMP, then the number of supported user equipment increases, but the throughput is reduced
Solution Approach 1:
The patent applies dimensionality change by moving the extension control area from the traditional control region into the data area of subframes. Specifically, the extension control area is configured in the data area of downlink subframes with periodicity, utilizing the time-frequency resources of the data area to carry additional control information for MU-MIMO and CoMP operations, thereby extending control capacity without sacrificing throughput
Solution Approach 2:
The patent implements periodic action by configuring the extension control area to be transmitted with a specific periodicity in the data area. The base station transmits the extension control area periodically in downlink subframes, allowing user equipment to receive control information at regular intervals without requiring continuous control signals, thus maintaining throughput while supporting multiple users
2Reliability
If additional control signals are introduced for MU-MIMO and CoMP techniques, then the communication rate and cell edge quality improve, but the control signal resources become insufficient
Solution Approach 1:
The patent applies universality by making the extension control area serve multiple functions. The extension control area in the data area carries control information for multiple purposes including MU-MIMO scheduling, CoMP operations, and resource allocation for multiple user equipment. This multi-functional design allows a single control structure to support various advanced techniques without requiring separate dedicated control signals for each function
Solution Approach 2:
The patent resolves the control signal resource shortage by utilizing the data area dimension. Instead of expanding control signals in the traditional control region which is already saturated, the extension control area is placed in the data area where resources are abundant. This spatial relocation in the time-frequency domain provides additional control signal resources without interfering with data transmission efficiency
Data Source
AI summary
A communication device, method, and system generate wireless communication signals that include a subframe within a radio frame. The subframe includes an extension control area in a data area of the subframe. The extension control area is set according to a periodic mapping pattern.