Remote Device Quality Feedback for Centralized Radio Resource Assignment
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Solution Overview
Problem
The separation of radio physical layer functions from central aggregation devices to remote devices in LTE and 5G systems complicates cooperation between the radio physical layer and upper layers, such as the MAC scheduler, making appropriate radio resource assignment to user devices challenging due to difficulties in feedback and coordination of downlink quality information.
Innovation Solution
Incorporating a quality information acquiring unit in the remote device to collect and transmit downlink quality information, such as CQI, PMI, and RI, to the central aggregation device, which then uses this information to assign radio resources to user devices, facilitating effective radio resource management despite the separation of functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the function of the radio physical layer is mounted in the remote device and the upper layer is mounted in the central aggregation device, then the required transmission band for the front-haul can be reduced, but the cooperation between the radio physical layer and the upper layer becomes difficult
Solution Approach 1:
The patent introduces a quality information transmitting unit as an intermediary component in the remote device that collects downlink quality information from the radio physical layer and transmits it to the upper layer in the central aggregation device. This intermediary mechanism facilitates communication and cooperation between the separated layers without requiring increased transmission bandwidth, thus resolving the contradiction between bandwidth reduction and cooperation difficulty.
2Extent of automation
If the function of the upper layer such as the MAC scheduler is mounted in the central aggregation device, then the radio resource assignment can be centralized, but the feedback of downlink quality information from the remote device to the central aggregation device becomes difficult
Solution Approach 1:
The patent implements a feedback mechanism through the quality information transmitting unit that systematically collects downlink quality information (including CQI, PMI, and RI) from the radio physical layer in the remote device and transmits it to the upper layer in the central aggregation device. This feedback loop ensures that centralized control can operate with accurate, real-time quality information without loss, resolving the contradiction between centralized automation and information feedback.
3Quantity of substance
If the radio physical layer and upper layer are separated into different devices, then the transmission band requirement is reduced, but the appropriate assignment of radio resource to user device becomes challenging
Solution Approach 1:
The quality information transmitting unit serves as an intermediary that bridges the separated radio physical layer and upper layer, ensuring accurate transmission of downlink quality information (CQI, PMI, RI) from the remote device to the central aggregation device. This enables the upper layer to make accurate radio resource assignment decisions despite the physical separation, maintaining manufacturing precision while reducing transmission bandwidth requirements.
Data Source
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AI summary
A communication control method according to the present invention is implemented in a radio base station (200) including a remote device (260) and a central aggregation device (210) and that performs radio communication with a user device (300) . The communication method includes acquiring including the remote device (260) acquiring via a predetermined uplink channel downlink quality information indicating radio communication quality in downlink acquired by the user device (300); transmitting including the remote device (260) transmitting to the central aggregation device (210) a quality data series containing one or more pieces of the downlink quality information acquired at the acquiring; and performing including the central aggregation device (210) performing assignment of a radio resource to the user device (300) based on the quality data series.