Multi-User Resource Grant Randomization for Even Transmit Power
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Solution Overview
Problem
Existing network communications systems face inefficiencies in resource allocation, leading to signal interference, sub-optimal power usage, and uneven network load distribution due to correlated scheduling patterns, particularly on the return link of satellite communications networks.
Innovation Solution
Implementing a randomizing map to reorder resource grants across slots in frames and adjust start times within slots, ensuring that resource grants are allocated in a randomized order and time-shifted to distribute network load more evenly, preventing front-loading effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If resource grants are allocated in time order according to frame structure, then scheduling simplicity is maintained, but network load distribution becomes uneven and front-loading effects occur
Solution Approach 1:
The patent applies dynamics by transitioning from a static time-order scheduling approach to a dynamic randomized scheduling approach. The scheduler randomly selects slots from the frame structure for resource grant allocation, making the scheduling process adaptive and flexible rather than fixed and rigid. This dynamic approach prevents predictable front-loading patterns while maintaining operational simplicity through automated random selection mechanisms.
2Device complexity
If correlated scheduling patterns are used across multiple beams, then scheduling complexity is reduced, but signal interference increases and power efficiency deteriorates
Solution Approach 1:
The patent applies asymmetry by introducing randomization that breaks the symmetry and correlation between scheduling patterns across different beams. Instead of using identical or correlated scheduling patterns for all beams, the system employs asymmetric randomized patterns specific to each beam. This asymmetric approach reduces signal interference and improves power efficiency while maintaining manageable complexity through beam-specific randomization rather than fully independent scheduling.
3Speed
If resource grants are concentrated in early slots, then transmission speed is improved, but power consumption increases and network load becomes uneven
Solution Approach 1:
The patent applies periodic action by distributing resource grant allocations across multiple slots in a systematic periodic manner. Instead of concentrating all transmissions in early slots, the randomization mechanism ensures that transmission opportunities are periodically distributed throughout the frame structure. This periodic distribution maintains transmission speed by ensuring continuous data flow while reducing peak power consumption in early slots and achieving more uniform network load distribution.
Data Source
AI summary
Schedulers that allocate resource grants on a slot-by-slot basis within a scheduling epoch or frame can create a front-loading effect where allocations occur more frequently in slots earlier in frames. To address these and other issues, systems and methods are disclosed for scheduling resource grants in a network to improve network transmit power profiles. For example, a scheduler is configured to randomize the order of slots in a scheduling epoch or frame, with different randomizations for different schedulers, to more evenly distribute slots with resource grant allocations to prevent or reduce a front-loading effect. As another example, the scheduler is configured to randomize start times of resource blocks within a slot to prevent or reduce the front-loading effect.