Wireless Terminal Temporary-AID Scheduling for Multi-User Uplink
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Solution Overview
Problem
Existing wireless LAN systems face challenges in providing high-efficiency and high-performance communication in high-density environments, particularly in efficiently scheduling multi-user uplink transmissions.
Innovation Solution
A wireless communication method and terminal that utilize a transceiver and processor to receive a trigger frame, perform multi-user uplink data transmission, and obtain ACK information using a temporary association identifier (AID) from a block ACK, allowing efficient scheduling and resource utilization in a contention-based channel access system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-user uplink transmission is implemented in high-density wireless LAN systems, then the communication efficiency and throughput are improved, but the scheduling complexity and resource management difficulty increase
Solution Approach 1:
The patent segments the uplink transmission resources by dividing the bandwidth into multiple resource units (RUs) and assigning them to different terminals. The trigger frame is also segmented to include separate fields for indicating RU allocation, terminal identification (AID), and transmission parameters for each scheduled terminal, thereby managing complexity through structured division.
Solution Approach 2:
The access point performs preliminary scheduling actions by sending a trigger frame that pre-allocates resource units to multiple terminals before they transmit uplink data. This preliminary action includes indicating the RU assignment, modulation and coding scheme (MCS), and other transmission parameters in advance, allowing terminals to prepare their transmissions without real-time negotiation.
2Adaptability or versatility
If random access is supported for terminals, then the adaptability and ease of operation are improved, but the resource utilization efficiency and scheduling overhead increase
Solution Approach 1:
The patent merges scheduled access and random access into a unified trigger frame mechanism. The trigger frame can simultaneously schedule specific terminals by AID and allocate resource units for random access terminals using a special AID value (e.g., AID=0 or reserved values). This merging allows the system to support both access modes efficiently without requiring separate procedures, thereby maintaining resource utilization while providing adaptability.
3Productivity
If multiple terminals transmit simultaneously in uplink, then the throughput and communication speed are improved, but the interference management and signal detection difficulty increase
Solution Approach 1:
The patent segments the uplink transmission spectrum into orthogonal resource units (RUs) that are assigned to different terminals. By allocating specific subcarriers and time resources to each terminal, the system enables simultaneous transmissions while minimizing inter-terminal interference through orthogonal frequency-division multiple access (OFDMA), thereby facilitating easier signal detection at the access point.
Solution Approach 2:
The trigger frame enables local quality optimization by assigning different modulation and coding schemes (MCS) to different resource units based on channel conditions. The access point can indicate specific MCS values for each terminal's allocated RU, allowing each transmission to be optimized for its local channel quality, thereby improving detection reliability while maintaining high throughput.
Data Source
AI summary
The present invention relates to a wireless communication terminal and a wireless communication method for efficiently scheduling multi-user uplink transmission.To this end, provided are a wireless communication terminal, including: a transceiver; and a processor, wherein the processor is configured to: receive, by the transceiver, a trigger frame that triggers a multi-user uplink transmission, perform a multi-user uplink transmission in response to the received trigger frame, and receive, by the transceiver, an ACK for the multi-user uplink transmission, wherein when the multi-user uplink transmission is performed on a resource unit in which a temporary association identifier (AID) is assigned by the received trigger frame, the processor obtains ACK information for the terminal from the ACK for the multi-user uplink transmission based on the temporary AID and a wireless communication method using the same.