Preemption-Based Multiplexing for Wireless Slot Scheduling
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in multiplexing enhanced mobile broadband (eMBB) and ultra-reliable-low latency communications (URLLC) services, particularly in terms of spectrum resource usage and decoding overhead, due to unpredictable URLLC traffic and excessive control overhead.
Innovation Solution
The implementation of preemption-based multiplexing using a control data region to schedule resources and a separate indicator channel to indicate the presence of URLLC communications within eMBB slots, allowing UEs to determine which slots to decode and which to skip, thereby reducing unnecessary processing and spectrum usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If preemption-based multiplexing uses indicator channels to indicate URLLC transmission presence in each mini-slot, then URLLC decoding reliability is improved, but spectrum resource consumption and processing overhead increase
Solution Approach 1:
The patent extracts the essential information from comprehensive indicator channels, keeping only the critical presence/absence indication of URLLC transmission. This selective extraction reduces the indicator channel overhead while maintaining the core functionality of enabling UEs to identify and decode URLLC transmissions reliably without processing unnecessary detailed parameters.
Solution Approach 2:
Instead of providing complete scheduling information for all possible URLLC parameters in each mini-slot, the patent applies partial action by indicating only whether URLLC transmission is present. This reduces the control overhead significantly while still enabling reliable URLLC decoding when needed, avoiding the excessive action of transmitting full scheduling details for every mini-slot.
2Measurement precision
If UEs decode indicator channels at every URLLC partial slot to determine resource puncturing, then URLLC communication accuracy is improved, but processing complexity and power consumption increase
Solution Approach 1:
The patent extracts only the essential presence/absence indication from the indicator channel, removing unnecessary detailed scheduling information. This allows UEs to quickly determine whether URLLC transmission occurs without complex decoding of comprehensive scheduling parameters, reducing processing complexity while maintaining accuracy in identifying URLLC resources.
Solution Approach 2:
The indicator channel provides preliminary information about URLLC transmission presence before the actual data transmission. This preliminary indication allows UEs to prepare appropriately - either to decode URLLC data with high accuracy or to skip processing entirely - thereby reducing overall processing complexity while maintaining communication accuracy when needed.
3Adaptability or versatility
If scheduling-based multiplexing is used for eMBB and URLLC, then resource allocation flexibility is improved, but control overhead and spectrum efficiency deteriorate
Solution Approach 1:
The patent merges the scheduling functionality into the existing control data region rather than using separate dedicated scheduling channels for URLLC. The indicator channel works in conjunction with existing control structures, combining the benefits of flexible resource allocation with reduced overhead by reusing existing control infrastructure rather than adding completely new signaling mechanisms.
Solution Approach 2:
The control data region and indicator channel structure serve multiple functions: they provide both eMBB scheduling information and URLLC preemption indications within a unified framework. This multi-functionality reduces the need for separate dedicated control channels, thereby reducing overall control overhead while maintaining resource allocation flexibility for both service types.
Data Source
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AI summary
Aspects of the present disclosure describe receiving control data for a slot of a first wireless service, where the control data indicates one or more partial slots of the slot that are intended for communications of the first wireless service. An indicator indicating whether data of the first wireless service is transmitted over at least one of the one or more partial slots can be received at a different time than the control data. The data of the first wireless service over the at least one of the one or more partial slots can be decoded based at least in part on the indicator.