WLAN Packet Header Detection for Early 802.11ad/ay Identification
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Solution Overview
Problem
Next-generation 60 GHz wireless local area networks (WLANs) need to be compatible with current 802.11ad devices while offering higher performance, requiring efficient auto-detection mechanisms to differentiate between 802.11ad and 802.11ay packets to reduce complexity and power consumption at receivers.
Innovation Solution
The method involves transmitting and receiving wireless packets with distinct header fields, using different modulation schemes and bit arrangements to indicate the presence of a second header, allowing receivers to automatically determine whether a packet is of type 802.11ad or 802.11ay, enabling early packet type identification and proper header selection for legacy device compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If next-generation 60 GHz WLANs (802.11ay) are designed to offer higher performance than current 802.11ad networks, then data transmission rate and network capability are improved, but device complexity and compatibility requirements increase
Solution Approach 1:
The packet structure is segmented into distinct fields: a first header compatible with 802.11ad, a second header specific to 802.11ay, a payload, and a training field. This segmentation allows legacy devices to process only the first header while next-generation devices can access both headers, enabling backward compatibility without sacrificing advanced functionality.
Solution Approach 2:
The first header is designed to be recognizable by legacy 802.11ad devices before they encounter the second header. This preliminary action allows legacy devices to identify and handle packets appropriately without needing to process the entire packet structure, reducing their complexity while maintaining compatibility.
2Adaptability or versatility
If receivers must process and differentiate between 802.11ad and 802.11ay packets, then compatibility is maintained, but power consumption increases
Solution Approach 1:
The compatibility functionality is extracted into a separate first header that can be independently processed. Legacy devices only need to extract and process this first header to determine packet type and handle compatibility requirements, rather than analyzing the entire packet structure, thereby reducing power consumption.
Solution Approach 2:
Packet type identification is performed early in the reception pipeline by examining the first header before full packet processing. This preliminary action allows receivers to quickly determine whether a packet is 802.11ad or 802.11ay and adjust their processing accordingly, avoiding unnecessary power consumption from processing incompatible packet types.
3Measurement precision
If packet type identification is performed late in the reception pipeline, then processing accuracy is maintained, but processing time increases
Solution Approach 1:
Packet type identification is performed as a preliminary action early in the reception pipeline by examining specific bits in the first header. This early identification allows the receiver to configure its processing parameters before full packet decryption and processing, maintaining accuracy while significantly reducing overall processing time.
Solution Approach 2:
The header is segmented into identifiable sections where specific bits indicate packet type. This segmentation allows rapid identification of packet type without needing to process the entire header or payload, enabling early decision-making in the reception pipeline.
Data Source
AI summary
A system and method of auto-detection of WLAN packets includes transmitting in a 60 GHz frequency band a wireless packet comprising a first header, a second header, a payload, and a training field, the first header carrying a plurality of bits, a logical value of a subset of the plurality of bits in the first header indicating the presence of the second header in the wireless packet.