HE-SIG-B Common Field Resource Allocation LUTs
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Solution Overview
Problem
The existing IEEE 802.11 wireless networking standard faces challenges in efficiently utilizing the HE-SIG-B common field for resource allocation in OFDMA and MU-MIMO systems, particularly in supporting varying operation bandwidths and efficiently signaling resource allocation information.
Innovation Solution
Implementing a fixed format for the HE-SIG-B common field that uses look-up tables (LUTs) for resource allocation, with specific configurations for different operation bandwidths, and incorporating indicators for MU-MIMO and middle-tone usage to optimize resource allocation and compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible format for HE-SIG-B common field is used to support varying operation bandwidths, then adaptability is improved, but device complexity increases due to multiple configuration options
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the number of RA LUTs in the HE-SIG-B common field based on the operation bandwidth. For 20 MHz bandwidth, one RA LUT is used; for 40 MHz, two RA LUTs are used; for 80 MHz, four RA LUTs are used; and for 160 MHz, eight RA LUTs are used. This parameter-based adaptation allows the system to efficiently support varying bandwidths while maintaining a standardized field structure.
2Productivity
If RA LUTs are included for each HE-SIG-B channel to support OFDMA and MU-MIMO, then resource allocation capability is improved, but information overhead increases
Solution Approach 1:
The patent applies segmentation by dividing the HE-SIG-B common field into multiple RA LUTs, with each LUT corresponding to a specific HE-SIG-B channel. This segmentation allows efficient resource allocation for OFDMA and MU-MIMO by providing dedicated lookup tables for each channel, while the structured organization minimizes overall overhead through standardized formatting and ordering rules.
3Quantity of substance
If HE-SIG-B common field is compressed for MU-MIMO operation, then information overhead is reduced, but measurement precision of resource allocation may be affected
Solution Approach 1:
The patent applies copying by duplicating RA LUTs across multiple HE-SIG-B channels to convey the same resource allocation information. This redundancy enables compression of the overall field size while maintaining measurement precision, as the repeated information can be efficiently encoded and decoded without loss of accuracy for MU-MIMO resource allocation.
Data Source
AI summary
Methods and apparatus are provided for HE-SIG-B common field formats and indications. In one novel aspect, a fixed format is used for HE-SIG-B common field indicating resource allocations (RA). In one embodiment, look-up tables (LUT) are configured for the resource allocation and indicated in the HE-SIG-B common field. In one embodiment, one or more RA LUTs are used based on the operation bandwidth. The RA LUTs are placed in an order of channel indexes from lower channel to upper channel signaled in each corresponding RA LUT. In another novel aspect, MU-MIMO is used for operation bandwidth of 160 MHz and a compression indicator is set in the HE-SIG-A field indicating a saving of all RA LUTS in the HE-SIG-B common field. In yet another novel aspect, a one-bit middle-tone indicator is included in the HE-SIG-B common field indicating whether the one or more middle 26 tone is used.