Terminal Device Pre-emption Indicator for URLLC eMBB Conflict
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Solution Overview
Problem
Current wireless communication systems face challenges in simultaneously supporting high capacity and low latency transmissions, as existing technologies struggle to efficiently manage the different requirements of Enhanced Mobile Broadband (eMBB) and Ultra-Reliable Low Latency Communications (URLLC) services within the same network, leading to potential errors in decoding eMBB data due to resource pre-emption by URLLC transmissions.
Innovation Solution
The method involves determining an allocation of downlink resources for a terminal device and using common pre-emption indicator transmission resources to identify when URLLC transmissions occur within allocated resources, allowing eMBB receivers to adjust and improve decoding accuracy by ignoring or processing affected signals accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If URLLC transmissions are prioritized to achieve low latency, then low latency communication is improved, but eMBB data reception reliability deteriorates due to resource pre-emption
Solution Approach 1:
A pre-emption indicator is introduced as an intermediary signal that mediates between URLLC and eMBB transmissions. When URLLC pre-empts eMBB resources, the pre-emption indicator is transmitted to notify the eMBB receiver, allowing it to correctly interpret the received signals and maintain decoding reliability despite the resource pre-emption.
Solution Approach 2:
The pre-emption indicator provides feedback information to the eMBB receiver about the status of allocated resources. This feedback mechanism allows the receiver to adapt its decoding process based on whether resources were pre-empted by URLLC transmissions, thereby maintaining reliability in dynamic resource allocation scenarios.
2Reliability
If common pre-emption indicator resources are added to indicate resource pre-emption, then eMBB reception reliability is improved, but system complexity increases
Solution Approach 1:
The pre-emption indicator is designed to serve multiple functions: it indicates resource pre-emption status, provides timing information about pre-emptive transmissions, and enables receivers to adjust their decoding processes. This multi-functionality reduces the need for separate signaling mechanisms, thereby limiting the increase in system complexity while achieving improved reliability.
3Adaptability or versatility
If resource allocation is made flexible to support both eMBB and URLLC, then network versatility is improved, but resource management complexity increases
Solution Approach 1:
The system implements dynamic resource allocation where URLLC transmissions can pre-empt eMBB resources when latency requirements demand. The pre-emption indicator mechanism enables this dynamic behavior by providing real-time information about resource status changes, allowing the network to flexibly adapt resource allocation without requiring complex centralized scheduling for every transmission decision.
Data Source
AI summary
A method of receiving data by a terminal device, comprising: determining an allocation of downlink resources of a wireless radio interface for the reception of data by the terminal device, receiving signals representing the data within the allocated downlink resources, wherein the receiving includes: determining that the allocated downlink resources include at least a portion of a first predetermined resource set, receiving via the wireless radio interface, signals within a first predetermined common pre-emption indicator transmission set of downlink resources allocated for the transmission of a first pre-emption indicator associated with the first predetermined resource set, determining, based on the signals received within the first predetermined common pre-emption indicator transmission set of downlink resources, whether a portion of the signals received within the allocated downlink resources and within the first predetermined resource set comprises data signals transmitted to a different terminal device.