Base Station Collision Handling for URLLC and eMBB
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Solution Overview
Problem
Current wireless communication networks face challenges in managing collisions between Ultra Reliable & Low Latency Communications (URLLC) and Enhanced Mobile Broadband (eMBB) transmissions, particularly due to the urgent nature of URLLC transmissions which can corrupt eMBB data, leading to inefficiencies and delays in data reception.
Innovation Solution
The solution involves allocating a second set of resources for transmitting downlink control-related information after identifying a collision, allowing for the minimization of the impact of such collisions by ensuring that control information is sent using alternative resources, thereby reducing the likelihood of transmission corruption and enabling successful data reception by terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If URLLC transmissions are sent urgently before resources are freed, then low latency requirement is met, but collision with eMBB transmissions occurs causing data corruption
Solution Approach 1:
The base station performs preliminary detection of potential collisions between URLLC and eMBB transmissions before they occur. When a collision is detected, the base station proactively sends a collision indication message to affected terminals, allowing them to prepare for retransmission before the corrupted data is received, thus maintaining both low latency and high reliability
Solution Approach 2:
The system implements a feedback mechanism where the base station monitors resource allocation and sends collision indication messages back to terminals when collisions are detected. This feedback loop enables terminals to adjust their reception and transmission strategies, requesting retransmission of corrupted data while URLLC transmissions proceed with urgent priority
2Speed
If URLLC transmissions are prioritized over eMBB transmissions, then low latency communication is achieved, but eMBB data reception is corrupted
Solution Approach 1:
The base station acts as an intermediary that manages the conflict between URLLC and eMBB transmissions. It detects collisions, sends indication messages to terminals, and coordinates retransmissions. This intermediary role allows URLLC to maintain high speed transmission while eMBB data integrity is preserved through coordinated retransmission requests
Solution Approach 2:
The collision indication mechanism converts the harmful effect of URLLC-eMBB collisions into a beneficial outcome. By notifying terminals of upcoming collisions, the system enables proactive retransmission requests, turning potential data loss into a controlled retransmission process that maintains both URLLC speed and eMBB integrity
3Reliability
If alternative resources are allocated for control information transmission, then transmission reliability is improved, but resource utilization efficiency decreases
Solution Approach 1:
The system applies local quality by allocating alternative resources specifically for control information transmission only when collisions are detected, rather than always using alternative resources. This selective approach ensures high reliability for control information when needed while maintaining efficient resource utilization during normal operation
Solution Approach 2:
The base station performs preliminary detection of collisions and proactively allocates alternative resources for control information transmission before the collision occurs. This preliminary action ensures that control information is transmitted reliably on clean resources while minimizing the time that alternative resources are in use, thus maintaining overall resource utilization efficiency
Data Source
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AI summary
There is provided a method of transmitting downlink control‐related information to a terminal in a wireless telecommunications system. The method comprises allocating downlink resources in a first set of resources for sending the downlink control‐related information; determining that a further downlink transmission will be transmitted using at least part of the allocated downlink resources thereby identifying a collision between the downlink control‐related information transmission and the further downlink transmission; upon identifying a collision, allocating a second set of resources for sending the downlink control‐related information; and transmitting the downlink control‐related information using at least the second set of resources.