Wireless Communication Apparatus Key Distribution for Data Acquisition
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Solution Overview
Problem
In IEEE 802.11bc wireless local area networks, wireless terminals struggle to verify the security and authenticity of data when reception of verification information is unsuccessful, leading to delayed or incorrect data acquisition due to packet collisions and the need for buffering all data portions until a key is received.
Innovation Solution
The wireless base stations broadcast keys usable for data transfer in both the first and second periods, allowing wireless terminals to receive and verify data authenticity even if the key is received in either period, thereby increasing the likelihood of correct data acquisition by using a one-way key chain and transmitting verification information in head and additional information frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If verification information is transmitted only in the first period, then data security verification is maintained, but data acquisition reliability decreases when packet collisions occur
Solution Approach 1:
The patent applies preliminary action by transmitting the key for the second period in advance during the first period through additional information frames. This allows wireless terminals to have the verification key ready before the second period begins, ensuring that even if the head information frame in the second period is lost due to packet collision, the terminal can still verify data authenticity using the pre-transmitted key from the additional information frame.
2Reliability
If all data portions are buffered until key reception is confirmed, then data authenticity is verified, but data acquisition time is delayed
Solution Approach 1:
The patent reduces buffering time by performing preliminary transmission of the second period's key during the first period via additional information frames. This allows wireless terminals to start buffering data earlier and reduce the waiting time for key reception confirmation, as the key may already be received from the additional information frame transmitted in the first period, thereby decreasing the overall data acquisition time while maintaining authenticity verification.
Data Source
AI summary
According to one embodiment, a wireless communication apparatus includes a transmitter. The transmitter transmits, in a first period, a first information frame. The first information frame includes first, verification information and a first key usable in the first period. The transmitter transmits, in the first period and after transmitting the first information frame, a data frame including first data. The transmitter transmits, in the first period and after transmitting the first information frame, a second information frame. The data frame includes a fourth key usable in a second period following the first period. The transmitter transmits, in the second period, a third information frame including third verification information and the fourth key.