XR Traffic Randomization via Staggering Offsets
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in reducing latency and interference in XR, AR, and VR applications due to synchronized data traffic arrival times, leading to queue buildup and erroneous communications.
Innovation Solution
Introducing a staggering offset for both uplink and downlink communications to randomize data traffic arrival times, allowing for more spread-out communication and reducing interference, which is achieved by transmitting staggering indications from the base station to the UE, enabling the UE to communicate based on received staggering offsets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If synchronized data traffic arrival times are used in wireless communication systems, then communication simplicity is maintained, but queue buildup and interference increase leading to higher latency
Solution Approach 1:
The base station performs preliminary randomization of downlink traffic arrival times by applying a downlink traffic randomization offset before transmitting data to the UE. This preliminary action prevents synchronized traffic arrival at the base station, reducing queue buildup and latency without requiring complex UE-side processing
Solution Approach 2:
The UE performs preliminary randomization of uplink traffic arrival times by applying an uplink traffic randomization offset before transmitting data to the base station. This preliminary action spreads out uplink traffic arrivals, reducing interference and latency while maintaining protocol simplicity
2Reliability
If multiple UEs communicate simultaneously with synchronized traffic patterns, then resource utilization is maximized, but interference increases causing erroneous communications
Solution Approach 1:
Each UE is assigned a unique traffic randomization offset value, creating local differentiation in traffic patterns. This local quality variation ensures that while all UEs use the same communication resources (maintaining productivity), their individual traffic arrival times are randomized differently (improving reliability by reducing simultaneous interference)
Solution Approach 2:
The traffic randomization offsets create periodic but desynchronized traffic patterns across multiple UEs. Each UE follows a periodic transmission schedule, but the periods are offset from one another, allowing efficient resource utilization while preventing synchronized interference that would cause erroneous communications
Data Source
AI summary
Methods, computer program products, and apparatuses for staggering downlink and uplink communications are provided. An example method at a UE includes establishing a connection with a base station. The example method further includes receiving, from the base station, at least one staggering indication comprising a downlink staggering offset for downlink communication and an uplink staggering offset for uplink communication, the downlink communication being an XR, a VR, or an AR downlink communication and the uplink communication being an XR, a VR, or an AR uplink communication. The example method further includes communicating, with the base station, via downlink communication or uplink communication based on the uplink staggering offset and the downlink staggering offset.