WLAN Frame Preamble Duplication for Receiver Power Reduction
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Solution Overview
Problem
Current wireless local area network (WLAN) communication systems face challenges in efficiently transmitting and receiving data across multiple users due to limitations in frame structure and resource allocation, leading to potential interference and suboptimal load balancing.
Innovation Solution
The proposed solution involves generating and transmitting WLAN frames with duplicated preamble portions across multiple sub-bands, allowing for efficient decoding by receivers and enabling load balancing by segregating common and dedicated preamble information, thereby optimizing resource allocation and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If duplicated preamble portions are transmitted across multiple sub-bands, then receivers can decode frames without powering multiple transceiver chains, but this increases the complexity of frame structure and resource allocation
Solution Approach 1:
The preamble is segmented into common portions and dedicated portions, with common portions duplicated across multiple sub-bands. This segmentation allows receivers to efficiently decode common information without processing all sub-bands, reducing power consumption while maintaining structured organization.
Solution Approach 2:
The common preamble portion is copied and transmitted across multiple sub-bands. This copying enables receivers to obtain necessary common information from any single sub-band, eliminating the need to power multiple transceiver chains while the systematic copying pattern maintains manageable frame structure.
2Productivity
If common and dedicated preamble information are segregated, then load balancing is achieved across sub-bands, but this increases the complexity of resource allocation
Solution Approach 1:
Preamble information is segmented into common portions (transmitted across multiple sub-bands) and dedicated portions (transmitted in specific sub-bands). This segmentation enables load balancing by distributing common information efficiently while allocating dedicated resources appropriately, improving network throughput through optimized resource utilization.
Solution Approach 2:
Different sub-bands are assigned different qualities of information - common portions in multiple sub-bands for broad accessibility and dedicated portions in specific sub-bands for targeted communication. This local differentiation achieves load balancing while the systematic assignment pattern keeps resource allocation manageable.
3Productivity
If separate frame structures are defined for downlink and uplink frames, then transmission efficiency is improved, but this increases the complexity of protocol implementation
Solution Approach 1:
The frame structure employs dynamic elements where common preamble portions are duplicated across sub-bands and dedicated portions are allocated based on specific transmission needs. This dynamic allocation improves transmission efficiency by optimizing resource usage while the systematic patterns in duplication and allocation reduce protocol implementation complexity through predictable structures.
Data Source
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AI summary
Techniques are described for wireless communication. One or more wireless local area network (WLAN) preamble portions may span multiple 20 MHz frequency bands, and may be duplicated across a transmission bandwidth. WLAN preamble portions may include common portions for multiple receivers as well as dedicated portions for particular receivers, and common portions may be transmitted in a primary frequency band in some examples. Some techniques provide that WLAN preamble portions may be encoded using different sized code blocks. Various aspects of the disclosure also provide for signaling of resource allocations of WLAN wireless frames.