ELR PPDU Signaling for Early Packet Drop in Long-Range Wi-Fi
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Solution Overview
Problem
Existing wireless communication technologies face challenges in efficiently managing long-range transmissions, leading to unnecessary power consumption and processing overhead due to unintended devices parsing packets intended for others.
Innovation Solution
Implementing enhanced long range (ELR) signaling designs, including a universal signal (U-SIG) field with subfields indicating ELR format and STA identifier, and ELR sequences to facilitate early packet drop and selective parsing, along with ELR-SIG fields for improved signal quality and range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If long-range transmissions are implemented, then transmission range is improved, but power consumption increases due to unintended devices parsing packets
Solution Approach 1:
The patent applies preliminary action by including ELR indication information in the U-SIG field before the data payload, allowing receiving devices to determine early whether a packet is intended for them. This enables unintended devices to drop packets before full processing, reducing power consumption while maintaining extended transmission range for intended recipients
2Length of stationary object
If long-range transmissions are implemented, then transmission range is improved, but processing overhead increases due to unintended devices parsing packets
Solution Approach 1:
The U-SIG field contains ELR indication information that allows receiving devices to make early decisions about packet relevance. This preliminary filtering mechanism reduces processing overhead by preventing unintended devices from parsing the entire packet, while maintaining the capability for long-range transmissions to intended devices
3Productivity
If U-SIG field with ELR indication is added, then packet routing efficiency is improved, but signal field complexity increases
Solution Approach 1:
The patent segments the signaling function by adding a specific ELR indication subfield within the existing U-SIG field structure. This segmentation allows efficient packet routing through dedicated indication bits while maintaining compatibility with existing Wi-Fi 7 signal field frameworks, minimizing overall signal field complexity
Solution Approach 2:
The U-SIG field is designed to serve multiple functions: it provides ELR indication for routing efficiency while maintaining compatibility with legacy devices and supporting future extensions. This multi-functionality improves packet routing efficiency without proportionally increasing signal field complexity
4Use of energy by moving object
If early packet drop is enabled, then power consumption is reduced, but packet detection capability may be affected
Solution Approach 1:
The ELR indication information is placed in the U-SIG field which is transmitted before the data payload and is sufficiently powerful for detection. This preliminary indication allows devices to make energy-efficient drop decisions while the strong signal ensures reliable detection before the drop decision is made, maintaining packet detection capability
Data Source
AI summary
This disclosure provides methods, components, devices, and systems for signaling designs for enhanced long range (ELR) transmissions. Some aspects more specifically relate to preamble field designs of ELR physical layer (PHY) protocol data unit (PPDU) formats. In some implementations, a wireless communication device may transmit, via a universal signal (U-SIG) field, a first indication that a PPDU is associated with an ELR format and a second indication of a station (STA) identifier. Additionally, or alternatively, a wireless communication device may transmit, via a set of ELR symbols within a PPDU, an ELR sequence in accordance with a mapping between basic service sets (BSSs) and ELR sequences. Additionally, or alternatively, a wireless communication device may include one or more subfields within an ELR-signal (ELR-SIG) field in accordance with a location of the ELR-SIG field and employ one or more transmission schemes associated with the ELR-SIG field and an ELR-data field.