Base Station Control Signal Segmentation for HARQ Overhead Reduction
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Solution Overview
Problem
There is a lack of efficient HARQ retransmission control methods in wireless local area networks (WLAN) for Extreme High Throughput (EHT) standards, particularly in Multi-User (MU) transmissions, which hinders the improvement of communication quality and link efficiency.
Innovation Solution
A base station and terminal system that generates and transmits control signals containing common and user-specific information for HARQ retransmission control, optimizing the configuration of user information to reduce overhead and enhance system efficiency in MU transmissions by indicating HARQ information such as HARQ Type and Redundancy Version (RV) in the control signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ retransmission control is implemented in MU transmissions, then link efficiency and communication quality are improved, but signaling overhead increases due to the need to transmit control signals containing HARQ information for multiple users
Solution Approach 1:
The control signal is segmented into common information fields (applicable to all users) and user-specific information fields (specific to each user). This segmentation allows the patent to efficiently manage HARQ control information by separating user-common parameters from user-specific parameters, thereby reducing redundant signaling while maintaining comprehensive control capability for multiple users.
Solution Approach 2:
The control signal structure is designed with universal common information fields that can serve multiple users simultaneously. By placing certain HARQ control parameters in the common information section, the system achieves multi-functionality where a single control signal structure can efficiently manage retransmission control for multiple users, reducing overall signaling overhead.
2Measurement precision
If detailed user-specific HARQ control information is transmitted for each user, then retransmission control accuracy is improved, but device complexity increases due to the need to generate and process separate control information for multiple users
Solution Approach 1:
The control information is divided into common fields and user-specific fields. This segmentation allows the base station to generate control signals with precise user-specific HARQ parameters while maintaining a standardized overall structure. The separation reduces processing complexity by allowing independent generation and processing of common and user-specific portions.
Solution Approach 2:
User-specific information fields are designed to contain only the necessary HARQ control parameters for each individual user, rather than duplicating all control information. This local quality approach ensures high retransmission control accuracy for each user while minimizing the total amount of data that needs to be processed and transmitted.
Data Source
AI summary
A downlink wireless transmission device comprising: a control circuit that generates common information that is common to a plurality of users and unique user information that is unique to each of the plurality of users and corresponds to information pertaining to retransmission control, said common and unique information including information pertaining to retransmission control for each of the plurality of users; and a transmission circuit that transmits control signals including the common information and the unique user information.