Wireless Signaling Field Null Channel Indication
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Solution Overview
Problem
Current wireless communication systems, particularly WLAN systems, face inefficiencies in data transmission due to limitations in channel bandwidth and resource allocation schemes, especially when dealing with non-contiguous channels or channels not supported by legacy systems.
Innovation Solution
A method and apparatus for efficiently transmitting signals in a wireless LAN system using a multi-user scheme, which configures radio frames with signaling fields that include bandwidth information and user-specific information to indicate the presence and location of null channels within the bandwidth, enabling efficient resource allocation for orthogonal frequency division multiple access (OFDMA) or multi-user multiple input multiple output (MU-MIMO) in future-generation WLAN systems conforming to IEEE 802.11ax standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If legacy WLAN systems use fixed channel bandwidth allocation, then system compatibility is maintained, but bandwidth utilization efficiency deteriorates when dealing with non-contiguous channels or channels not supported by legacy systems
Solution Approach 1:
The patent implements dynamic resource allocation by allowing the bandwidth information field to flexibly indicate different channel configurations (contiguous or non-contiguous channels, various bandwidth sizes). The system can adaptively select and signal appropriate channel allocations based on current conditions, moving from static legacy allocations to dynamic flexible allocations that optimize bandwidth utilization while maintaining compatibility through standardized signaling mechanisms.
2Manufacturing precision
If the signaling field includes detailed bandwidth information and null channel indicators, then resource allocation precision is improved, but signal frame complexity increases
Solution Approach 1:
The patent changes the parameters of the signaling field to include bandwidth information that can indicate different channel configurations. By using standardized field formats that can represent multiple channel scenarios (contiguous, non-contiguous, different bandwidths), the system achieves precise resource allocation without proportionally increasing complexity. The parameter changes allow a single signaling structure to handle diverse allocation scenarios efficiently.
3Productivity
If non-contiguous channels are supported, then bandwidth utilization is improved by avoiding interference, but resource allocation complexity increases
Solution Approach 1:
The patent segments the channel bandwidth into multiple selectable units that can be independently allocated. The bandwidth information field indicates which segments (channels) are active and their configurations. This segmentation approach allows non-contiguous channel allocation by selecting specific segments while keeping the overall resource management structured and manageable through standardized signaling, rather than requiring complex custom configurations for each scenario.
Data Source
AI summary
Disclosed is a method by which an operating station (STA) transmits a signal in a multiple user (MU) scheme in a wireless LAN (WLAN) system. In the present method, the STA configures a wireless frame, which includes a data field for data transmission and a signaling (SIG) field including control information, wherein the SIG field includes a SIG A field, which includes bandwidth information indicating the whole bandwidth having a bandwidth of 2n times that of 20 MHz, and a SIG B field, which includes user specific information. Here, the bandwidth information of the SIG A field additionally indicates whether the whole bandwidth includes one or more 20 MHz bands (null channel), which are not used in the data transmission.