Coordinated AP Response Control to Prevent Redundant Retransmission
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Solution Overview
Problem
In existing AP-to-AP coordination systems, if one AP fails to receive an ACK from a STA, it may retransmit data that has already been successfully received, leading to unnecessary data retransmissions.
Innovation Solution
Implementing a communication control mechanism where APs transmit a Joint Tx Response frame to a Master AP, which includes Block Ack information, allowing the Master AP to determine if data retransmission is necessary, thereby preventing unnecessary retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a terminal transmits a scheduling request signal and uplink data signal simultaneously in PUCCH and PUSCH, then communication efficiency is improved, but interference between signals occurs and data accuracy deteriorates
Solution Approach 1:
The patent introduces a dummy signal as an intermediary element to fill the guard period. This dummy signal acts as a mediator that prevents direct interference between the uplink data signal and scheduling request signal by occupying the time resources that would otherwise cause collision, thereby maintaining data accuracy while enabling simultaneous transmission
Solution Approach 2:
The patent segments the PUSCH transmission by dividing it into a data transmission region and a guard period region. The guard period is further segmented to accommodate dummy signals, creating distinct time slots that separate different signal types and prevent interference while maintaining overall transmission efficiency
2Reliability
If PUSCH transmission is stopped to avoid interference with scheduling request signal, then data accuracy is maintained, but communication efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-allocating guard periods within the PUSCH structure and pre-filling them with dummy signals before actual data transmission. This advance preparation ensures that when scheduling request signals need to be transmitted, the interference-prone regions are already occupied, allowing simultaneous transmission without stopping PUSCH and maintaining both data accuracy and communication efficiency
3Reliability
If PUCCH and PUSCH are frequency-division multiplexed, then signal interference is avoided, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent transitions from frequency-division multiplexing to time-domain multiplexing by introducing guard periods and dummy signals in the time dimension. This dimensional shift allows simultaneous transmission of PUCCH and PUSCH in the frequency domain while using time-based separation (guard periods) to prevent interference, thereby improving resource utilization without sacrificing signal integrity
Data Source
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AI summary
The present technology relates to communication control devices and methods, wireless communication devices and methods, and wireless communication terminals that can prevent retransmission of data that does not need to be retransmitted. A communication control device includes a communication unit that communicates with a first wireless communication device and a second wireless communication device; and a control unit that performs control to transmit response setting information in which a transmission method of a transmission result of coordinated transmission to a wireless communication terminal by the first wireless communication device and the second wireless communication device is set to the first wireless communication device and the second wireless communication device. The present technology can be applied to communication systems.