Uplink Partial-Bandwidth Packet Format for Flexible RU Scheduling
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Solution Overview
Problem
The challenge in wireless communication systems is to achieve flexible frequency scheduling while minimizing the overhead for reporting control signaling, which increases with greater flexibility.
Innovation Solution
A transmission apparatus and method that generates a transmission signal with a non-legacy preamble comprising two channel fields for subband channels, each with user-specific fields for per-user allocation information, and relocates BCC blocks between these fields to minimize overhead and improve channel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexibility in frequency scheduling is increased, then adaptability of resource allocation is improved, but overhead for reporting control signaling increases
Solution Approach 1:
The control signaling is segmented into two separate channel fields (first channel field for first subband channel, second channel field for second subband channel). Each field contains user-specific fields with per-user allocation information. This segmentation allows the control signaling to be distributed across multiple channels, reducing the overhead on any single channel while maintaining flexible frequency scheduling capability.
2Measurement precision
If more control signaling bits are used to report resource assignment information, then accuracy of frequency scheduling is improved, but overhead for reporting control signaling increases
Solution Approach 1:
The control signaling is extended from a single-channel dimension to a multi-channel dimension. By distributing user-specific fields across first and second channel fields corresponding to different subband channels, the patent achieves accurate frequency scheduling information delivery without concentrating all control signaling bits in one place, thereby reducing overhead while maintaining precision.
3Ease of operation
If user-specific fields are concentrated in one channel field, then ease of decoding is improved, but reliability of transmission in presence of interference decreases
Solution Approach 1:
User-specific fields are segmented and distributed across first and second channel fields. This segmentation provides diversity against interference - if one channel field experiences interference, the other channel field may still deliver the user-specific information reliably. The distributed structure maintains decoding ease while improving transmission reliability through spatial diversity.
Data Source
AI summary
A communication apparatus includes circuitry configured to generate an uplink (UL) single-user (SU) partial bandwidth transmission packet using a first format that contains a first preamble and a data field, wherein the first preamble includes a high efficiency signaling B (HE-SIG-B) field containing resource unit (RU) allocation information indicating one of a plurality of RU arrangements and includes a plurality of user fields; and a transmitter configured to transmit the UL SU partial bandwidth transmission packet to an access point (AP). The one of the plurality of RU arrangements indicates a plurality of RUs which respectively correspond to the plurality of user fields, and one RU of the plurality of RUs is an RU allocated to the AP and other RU(s) of the plurality of RUs are RU(s) unallocated to the AP. The first format is also used for a downlink (DL) multi-user (MU) transmission.