Wireless Slot Information Bitmaps for Latency-Sensitive Traffic
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Solution Overview
Problem
Existing wireless communication systems struggle to prioritize latency-sensitive traffic effectively, leading to degraded user experiences in augmented and virtual reality applications due to latency issues, such as motion sickness caused by judder during head movements.
Innovation Solution
Adaptive allocation of communication resources and time slots based on utilization and priorities, with devices negotiating access to prioritize latency-sensitive traffic streams, using bitmaps to indicate slot status and duration, period, and persistency, and employing WLAN protocols for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing wireless communication systems use standard traffic prioritization, then device complexity remains low, but latency-sensitive traffic cannot be effectively prioritized leading to degraded user experience
Solution Approach 1:
The time domain is segmented into multiple discrete time slots within a communication frame. Each slot can be independently allocated and assigned to different traffic types or devices. This segmentation enables fine-grained control over latency-sensitive traffic by reserving specific slots for critical applications, thereby improving quality of service without requiring complete redesign of the communication protocol.
Solution Approach 2:
Slot allocation and assignment decisions are made in advance before actual data transmission occurs. The system pre-determines which time slots will be dedicated to latency-sensitive traffic versus best-effort traffic, and notifies relevant devices beforehand. This preliminary action ensures that when latency-sensitive data needs to be transmitted, the corresponding slot is already reserved and ready, eliminating last-minute contention and reducing latency.
2Speed
If time slots are adaptively allocated based on utilization and priorities, then latency-sensitive traffic is prioritized effectively, but the complexity of slot management and negotiation increases
Solution Approach 1:
Different time slots are marked with distinct identifiers or flags that indicate their allocation status and intended用途. For example, slots can be tagged as 'latency-sensitive', 'best-effort', or 'reserved'. This coloring mechanism allows receiving devices to quickly understand slot characteristics without complex parsing, enabling fast decision-making about packet routing while maintaining low processing complexity.
Solution Approach 2:
A centralized slot manager or coordination entity acts as an intermediary between multiple communicating devices. This mediator maintains a global view of slot availability and allocation decisions, and communicates slot assignment information to relevant devices through standardized messages. The intermediary handles the complexity of coordination centrally, allowing individual devices to remain simple while still achieving adaptive slot allocation based on utilization and priorities.
3Loss of information
If bitmaps are used to indicate slot status for each time slot, then slot status information is conveyed efficiently, but the message size and processing overhead increase
Solution Approach 1:
The slot status information is segmented into a bitmap format where each bit corresponds to a specific time slot's status. This compact representation conveys complete slot status information (allocated, unallocated, reserved) using minimal bits - exactly as many bits as there are slots. This approach achieves complete information transmission with minimal overhead, avoiding the need for verbose textual descriptions of each slot's state.
Solution Approach 2:
Instead of transmitting full slot details or using variable-length encoding, the system uses a fixed-length bitmap where the parameter representation changes from descriptive to binary status indicators. This parameter change dramatically reduces message size while maintaining complete information about slot status. The trade-off is acceptable because the bitmap is processed efficiently by hardware or optimized software, and the reduction in data quantity directly lowers processing overhead and transmission time.
Data Source
AI summary
Disclosed herein are systems and methods related to describing slot information. In one aspect, a first wireless communication device determines a bitmap having a value for each of a plurality of slots for wireless traffic. The bitmap may indicate a status or type of a corresponding slot. The first wireless communication device may send, using a wireless local area network (WLAN) based protocol, to a second wireless communication device, a message comprising the bitmap. The message may further comprise a duration of each of the plurality of slots, a period of the plurality of slots, and a persistency of the plurality of slots.