Radio LAN Header and Idle Time Optimization
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Solution Overview
Problem
In radio communication systems based on IEEE 802.11, high-speed data transmission rates lead to increased overhead time due to fixed idle times and header transmission, resulting in decreased data transmission efficiency and throughput.
Innovation Solution
Implementing a method to reduce header transmission time and idle time in radio communication terminals, allowing for optimized overhead management through advanced communication settings, such as adding headers only to specific data transmissions, utilizing identification information, and reducing idle times after acknowledgment, to enhance data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-speed data transmission is implemented, then data transmission rate is improved, but overhead time ratio increases and data transmission efficiency decreases
Solution Approach 1:
The patent dynamically changes the IFS parameter based on transmission conditions. When continuous transmission is possible, IFS is reduced to minimal value or eliminated. When channel access contention occurs, standard IFS is applied. This parameter adaptation resolves the contradiction by optimizing overhead time according to actual transmission needs, maintaining high efficiency at high data rates.
Solution Approach 2:
The system transitions from static IFS to dynamic IFS adjustment. The IFS value changes based on whether the terminal has transmission data ready and channel access status. This dynamic behavior allows the system to adapt to varying transmission conditions, resolving the efficiency-speed contradiction.
2Reliability
If header is added to every data transmission, then communication reliability is improved, but overhead time increases and transmission efficiency decreases
Solution Approach 1:
The patent extracts the header from continuous data transmissions when the receiving terminal already has current header information cached. Headers are only included when necessary (initial transmission, information updates). This selective extraction maintains reliability when needed while eliminating redundant overhead, resolving the time-loss versus reliability contradiction.
Solution Approach 2:
The receiving terminal performs preliminary action by caching header information in advance. This cached information is then reused for subsequent transmissions, eliminating the need to retransmit identical headers. This preliminary caching action reduces overhead time while maintaining communication reliability.
3Reliability
If standard IFS is maintained for collision avoidance, then signal collision prevention is improved, but data transmission efficiency decreases due to excessive idle time
Solution Approach 1:
The patent changes the IFS parameter from a fixed standard value to a dynamic value that adapts to transmission conditions. When continuous transmission is possible, IFS is reduced to minimal or zero. When contention occurs, standard IFS is applied. This parameter change maintains collision avoidance reliability while minimizing idle time loss.
Solution Approach 2:
The system implements dynamic IFS adjustment based on real-time transmission status and channel access conditions. This dynamic adaptation allows the system to maintain collision avoidance when necessary while maximizing transmission efficiency when the channel is clear, resolving the contradiction between reliability and time loss.
Data Source
AI summary
The present invention discloses a radio communication method or the like, which contributes to the improvement of data transmission efficiency in a radio communication based on TDMA system (in particular, radio communication in accordance with IEEE Std. 802.11) by providing idle time between the data transmitted and received by radio communication terminals on a radio section. In the radio communication between radio communication terminals, data transmission efficiency is improved by reducing transmission time of header added to the data or by reducing idle time. More concretely, header is added to the data for each predetermined data transmission, for instance, and by transmitting the other data without header added to it, transmission time of header is reduced. Also, data transmission efficiency is improved by carrying out methods such as a method to acquire header of the data on radio section in advance, a method to utilize identification information as the header, and a method to transmit continuous data by reducing IFS (InterFrame Space) after Ack (receiving acknowledgment information).