Wireless ACK Frame Station Identification via Unique IDs
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Solution Overview
Problem
Current wireless communication systems lack the ability to uniquely identify transmitting stations in acknowledgement frames, leading to inefficiencies in acknowledging successful receptions, especially in multi-access scenarios where simultaneous transmissions are used, resulting in increased transmission times and difficulties in determining which stations did not receive data.
Innovation Solution
Incorporating unique identifying information, such as a transmitter MAC address or station ID, into the acknowledgement frames allows for the differentiation of ACKs from multiple transmitting stations, enabling simultaneous transmission and identification of non-receiving stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple access methods (SDMA, OFDMA) are used to transmit ACK frames simultaneously, then transmission time is reduced and productivity is improved, but the ability to identify which station did not receive data is lost
Solution Approach 1:
The patent applies local quality by making the ACK frame structure different for different transmitting stations. Each station's ACK includes unique identifying information (MAC address or station ID) so that while multiple stations transmit simultaneously using SDMA/OFDMA, each ACK can be individually identified and associated with its correct transmitting station, resolving the contradiction between simultaneous transmission and station identification.
2Loss of information
If ACK frames are transmitted in time-staggered serial fashion, then transmitting station identification is maintained, but transmission time increases and productivity decreases
Solution Approach 1:
The patent transitions from time-domain multiplexing (serial transmission) to space-domain multiplexing (simultaneous transmission). By adding unique identifying information to the ACK frame structure, the system enables multiple stations to transmit ACKs simultaneously in the same time slot while maintaining station identification through the enhanced frame format, thereby improving productivity without losing identification capability.
3Loss of information
If unique identifying information is added to ACK frames, then transmitting station identification is improved, but frame complexity increases
Solution Approach 1:
The patent applies universality by making the ACK frame structure multi-functional. The enhanced ACK frame format can identify the transmitting station while maintaining compatibility with existing IEEE 802.11 protocols. The unique identifying information (MAC address or station ID) is integrated into the existing frame structure in a way that allows multiple stations to be distinguished without requiring completely new frame formats, thus reducing the complexity increase.
Data Source
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AI summary
A method of wireless communication for acknowledging receipt of a packet is disclosed that includes determining that the packet has been received successfully; and, generating an acknowledgment (ACK) message upon the determination that the packet is received successfully, wherein the ACK message includes a unique identifier associated with a receiver used to receive the packet. An apparatus for performing the method is also disclosed herein.