Multi-Rate Aggregation for Wireless Resource Efficiency
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Solution Overview
Problem
Conventional wireless communication systems using packet aggregation schemes, such as those based on IEEE 802.11 and 802.16 standards, face inefficiencies in resource management and power consumption due to the use of a single transmission rate for all reception stations, which limits transmission efficiency and increases power loss.
Innovation Solution
A data communication method that determines transmission rates for each reception station based on channel state information, aggregates packets with the same transmission rate into groups, and transmits these groups using a single multi-rate aggregation (MRA) burst, minimizing power consumption by allowing stations to enter a reception mode only during their designated packet group intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single transmission rate is used for all reception stations in multi-receiver aggregation, then all reception STAs can receive the MRA, but transmission resource efficiency is reduced due to using the lowest transmission rate
Solution Approach 1:
The patent segments reception stations into different groups based on their channel conditions and assigns different transmission rates to each group. This allows the system to optimize transmission efficiency for each segment while ensuring all stations can receive the data, resolving the contradiction between reliability and productivity.
Solution Approach 2:
The patent applies different transmission rates to different reception station groups based on their individual channel conditions. Each group receives data at the optimal rate for its members, improving overall transmission resource efficiency while maintaining reliable reception for all stations.
2Productivity
If packet aggregation is implemented to improve transmission efficiency, then radio resource efficiency is maximized, but power consumption increases due to continuous reception monitoring
Solution Approach 1:
The patent includes a control MPDU that provides advance information about the packet aggregation structure and transmission parameters before the actual data transmission begins. This allows reception stations to prepare their receivers in advance and enter low-power states during intervals when no data is transmitted, reducing overall power consumption while maintaining transmission efficiency.
Solution Approach 2:
The patent structures packet aggregation with periodic transmission intervals and includes mechanisms for stations to enter sleep modes during non-transmission periods. This periodic operation pattern allows stations to alternate between active reception and low-power states, reducing average power consumption while maintaining high transmission efficiency during active periods.
3Productivity
If transmission power is varied to optimize for different distances and channel characteristics, then transmission rate is optimized, but reception power reduction is not accounted for increasing power loss
Solution Approach 1:
The patent employs feedback mechanisms where reception stations provide channel state information to the transmitter. This feedback enables the transmitter to dynamically adjust transmission rates and power levels for each reception station group, optimizing the balance between transmission rate and power consumption while accounting for reception power requirements.
Solution Approach 2:
The patent dynamically changes transmission parameters including power levels and transmission rates based on channel conditions and reception station requirements. By adjusting these parameters for each reception group, the system optimizes transmission efficiency while minimizing power loss through coordinated power reduction at reception stations.
Data Source
AI summary
A wireless communication system including transmitters for determining a transmission rate for an associated receiver according to channel state information fed back from associated receivers, and transmitting packets at the determined transmission rate. In a communication method, a transmitter groups packets to be transmitted to the receivers according to transmission rates, and generates frames configured by packets with an identical transmission rate. The transmitter aggregates frames with different transmission rates into one transmission burst, and sends the transmission burst. The data communication method based on packet aggregation can efficiently manage resources by determining transmission rates for reception stations (STAs) on the basis of feedback channel state information in a transmission STA, aggregating packets to be transmitted to the reception STAs to form a packet group, and transmitting packet groups with different transmission rates using one multi-rate aggregation (MRA) burst.