Wireless Frame Access Category Selection for Channel Measurement
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Solution Overview
Problem
Existing wireless frame transmission protocols lack a defined access category for channel information measurement frames, leading to inefficiencies and potential failures in data transmission due to unclear channel conditions.
Innovation Solution
A method and apparatus that allow for the selection and use of any access category, preferably the highest priority one when multiple categories are idle, for transmitting frames like Null Data Packet Announcements (NDPA) and Sounding Polls to facilitate channel information measurement, ensuring consistent and reliable channel feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no access category is defined for channel information measurement frames, then the protocol remains simple, but channel information measurement fails or becomes unreliable
Solution Approach 1:
The patent applies parameter changes by assigning specific access category parameters to channel measurement frames. The transmitting device changes the access category parameter from undefined to a specific value (e.g., AC_VO or AC_VI) to ensure reliable transmission of NDPA and sounding poll frames, thereby resolving the reliability issue without significantly increasing protocol complexity.
2Adaptability or versatility
If any access category is used for channel measurement frames, then transmission flexibility is improved, but transmission reliability may deteriorate due to channel contention
Solution Approach 1:
The patent applies local quality by differentiating access category assignment for different frame types. Specifically, it assigns higher priority access categories (AC_VO or AC_VI) to channel measurement frames (NDPA, sounding poll) while other data frames use their respective appropriate categories. This localized quality enhancement ensures measurement frames get preferential treatment for reliable transmission.
Solution Approach 2:
The patent implements feedback mechanisms where the receiving device acknowledges receipt of channel measurement frames, and the transmitting device adjusts subsequent transmissions based on channel conditions and acknowledgment feedback. This ensures that even with flexible access category selection, transmission reliability is maintained through adaptive retransmission and confirmation protocols.
Data Source
AI summary
It is disclosed a method for transmitting wireless frame, including: the wireless frame is transmitted by using any access category. The wireless frame is a beginning frame for performing channel information measurement. It is further disclosed an apparatus for transmitting wireless frame, including: a selection unit and a transmitting unit, where the selection unit is configured to select any access category for a beginning frame for performing the channel information measurement; and the transmitting unit is configured to transmit the beginning frame. It is further disclosed a communication network element provided with the apparatus for transmitting wireless frame mentioned above. It is ensured that the wireless frames subsequent to the frame exchange sequence for performing the channel information measurement may be smoothly transmitted, and the channel information measurement may be smoothly performed, and thereby transmitting communication data based on the acquired channel information. The support of each communication network elements to the MIMO and beam forming is further ensured, and an effective supplement to the existing protocols is provided.