Dynamic ROM Outage Period via Power Management Feedback
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Solution Overview
Problem
Existing wireless networking standards face challenges in defining a universally applicable outage period for receive operation mode (ROM) indications, as the time required to adopt new settings varies significantly among devices due to factors like manufacturer and antenna implementation, leading to potential errors and increased latency.
Innovation Solution
The implementation of power management (PM) indication mechanisms in conjunction with ROM indication mechanisms, allowing wireless devices to transmit a data frame with ROM settings and a PM subfield, enabling a power management mode that delays subsequent transmissions until the device completes configuration, thereby establishing a ROM-related outage period tied to actual completion of new settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a globally applied outage period is defined for ROM indication mechanisms, then other wireless devices can delay transmitting data until after expiration of the outage period, but the outage time cannot be accurately matched to device-specific reconfiguration time requirements
Solution Approach 1:
The patent makes the outage period dynamic by having the receiving device determine it based on the actual ROM settings being adopted. Instead of using a fixed global outage period, the system calculates the outage period based on the specific channel width and spatial stream configuration changes, allowing the outage duration to adapt to each device's actual reconfiguration time requirements.
Solution Approach 2:
The patent changes the parameter used to define the outage period from a fixed global value to a device-specific value based on ROM settings. The receiving device determines the outage period by considering the actual ROM configuration changes (channel width, spatial streams) that the transmitting device is adopting, thereby matching the outage duration to the actual reconfiguration time needed.
2Reliability
If device-specific outage periods are used to match actual reconfiguration time, then ROM setting adoption reliability improves, but system complexity increases due to varying outage times among devices
Solution Approach 1:
The patent implements a feedback mechanism where the transmitting device informs the receiving device about the ROM settings it is adopting. The receiving device uses this feedback information to calculate and determine the appropriate outage period. This feedback loop allows the system to automatically adjust the outage period based on actual device requirements without requiring complex centralized coordination.
Solution Approach 2:
The receiving device autonomously determines the outage period based on the ROM settings information received from the transmitting device. Instead of requiring the transmitting device to specify the outage period or requiring complex network coordination, the receiving device self-services by calculating the appropriate outage duration based on the configuration changes it observes.
3Ease of manufacture
If an arbitrary outage time is applied to all devices, then implementation simplicity is maintained, but latency increases due to excessive delay periods
Solution Approach 1:
The patent makes the outage period dynamic rather than static. Instead of applying a fixed arbitrary outage time to all devices, the system adjusts the outage period dynamically based on the actual ROM configuration changes. This allows the outage duration to be minimized to only what is necessary for the specific reconfiguration, reducing unnecessary latency while maintaining implementation feasibility.
Data Source
AI summary
Systems and techniques relating to wireless networking, namely employing power management (PM) indication mechanisms in addition to ROM indication mechanisms so as to support ROM related outage period enhancements, include: transmitting a first data frame, wherein a format of the first data frame comprises: (i) a field indicating a change in receive operation mode (ROM) settings, and (ii) a subfield having a value indicating a power management mode of the wireless device; receiving an acknowledgement frame to enable a power management mode associated with the subfield in the first frame, the acknowledgement frame having been transmitted by a second wireless device in response to receiving the first frame by the second wireless device, wherein the power management mode delays transmission of additional frames to the first wireless device until receiving a second data frame having a value indicating a change in the power management mode.