Trigger Frame Padding for Random Access Processing Time
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Solution Overview
Problem
In wireless networking, particularly in high-density environments, existing technologies face challenges in ensuring sufficient processing time for stations to respond to trigger frames in random access uplink communications, leading to performance degradation due to increased interference and diverse application requirements such as video traffic and power consumption issues.
Innovation Solution
A method and device for initiating Up-Link (UL) Trigger Based (TB) Multi-User (MU) communication by allocating resources for Random Access (RA) communication, producing information fields indicating these allocations, and generating a trigger frame with a padding field to ensure a minimum processing time for stations receiving the frame, allowing them to process and respond effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If trigger frames are transmitted without padding fields, then transmission efficiency is improved, but stations do not have sufficient processing time to respond to the trigger frames
Solution Approach 1:
The patent applies preliminary action by pre-calculating and inserting padding fields into trigger frames before transmission. The access point determines the required padding length based on the latest trigger frame padding duration capability advertised by stations, and proactively adds this padding to ensure sufficient processing time is available before stations need to respond with uplink transmissions.
Solution Approach 2:
The patent implements dynamics by making the padding field length variable rather than fixed. The access point dynamically adjusts the padding duration based on capabilities advertised by different stations (via Trigger Frame MAC Padding Duration capability), allowing the system to adapt the processing time allocated to each station's specific requirements while maintaining efficient transmission.
2Reliability
If padding fields are added to trigger frames, then stations have sufficient processing time, but frame transmission time increases
Solution Approach 1:
The patent applies parameter changes by modifying the padding field duration parameter in trigger frames. The access point changes this parameter based on the latest trigger frame padding duration capability advertised by stations, allowing flexible adjustment of processing time allocation to match actual station requirements rather than using a fixed conservative value.
Solution Approach 2:
The patent implements self-service by enabling stations to advertise their own processing time requirements through the Trigger Frame MAC Padding Duration capability. This allows stations to self-determine the padding they need, and the access point automatically configures appropriate padding in subsequent trigger frames without manual intervention.
3Productivity
If random access resources are allocated without sufficient processing time, then resource utilization is improved, but stations cannot properly process and respond to trigger frames
Solution Approach 1:
The patent applies preliminary action by pre-configuring padding fields in trigger frames before random access resource allocation occurs. This ensures that when stations receive trigger frames allocating random access resources, they already have sufficient time to process the allocation information and prepare their responses, making the resource utilization reliable and effective.
Solution Approach 2:
The patent uses the padding field as an intermediary element between trigger frame transmission and random access resource allocation. This intermediary time period allows stations to process trigger frame information and prepares them for subsequent random access transmissions, ensuring both resource utilization and response reliability.
Data Source
AI summary
A wireless device initiates an Up-Link Trigger Based Multi-User communication by transmitting a trigger frame. The communication may be an Orthogonal Frequency Division Multiple Access communication. The trigger frame includes allocation information for resources of the communication, including Random Access (RA) allocation information. The trigger frame may also include a padding field after the allocation information. A length of the padding field is determined according to an amount of time needed for a station receiving the trigger frame to process the RA allocation information. The amount of time may correspond to a time between an end of a last RA allocation information and an end of a Physical layer Protocol Data Unit including the trigger frame. The amount of time may be determined according to a maximum processing time of stations associated with the wireless device, or may be determined according to a predetermined interval.