5G DCI Time-Resource Allocation by Receiving Position for URLLC
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Solution Overview
Problem
The reliability of data transmission in 5G communication systems, particularly for ultra-reliable low-latency communication (URLLC), is affected by the payload size and resource allocation of downlink control information (DCI), which can compromise flexibility and reliability.
Innovation Solution
A communication method that determines a second time domain resource set based on the receiving position and a first time domain resource set, allowing for flexible time domain resource allocation and improving the reliability of data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of the time domain resource allocation field in DCI is reduced, then the payload size of DCI is reduced and coding rate is improved, but the number of optional time domain positions is reduced and flexibility of data transmission is compromised
Solution Approach 1:
The time domain resource allocation is segmented into two parts: a first time domain resource set with a first number of time domain resources, and a second time domain resource set with a second number of time domain resources. The first part provides basic allocation options while the second part provides additional flexible options, allowing the system to maintain both reduced overhead and flexibility.
Solution Approach 2:
The patent introduces a new dimension by associating different time domain resource sets with different receiving positions of DCI. This dimensional approach allows the system to select appropriate resource sets based on the receiving position, thereby maintaining flexibility without increasing the payload size of DCI.
2Reliability
If the payload size of DCI is reduced to improve coding rate, then DCI overhead is reduced, but the number of available time domain resources is reduced
Solution Approach 1:
The network device pre-configures a first time domain resource set and a second time domain resource set before data transmission. This preliminary action ensures that sufficient time domain resources are available without needing to indicate them all in the DCI payload, thus maintaining both resource quantity and coding rate.
Solution Approach 2:
The receiving position of DCI acts as an intermediary that links the DCI message to the appropriate time domain resource set. This intermediary mechanism allows the system to maintain a large pool of available resources while using a compact DCI format with reduced payload size.
3Device complexity
If a fixed time domain resource allocation is used, then the DCI format is simplified, but the adaptability to different transmission scenarios is reduced
Solution Approach 1:
The patent implements a dynamic resource allocation mechanism where the second time domain resource set is determined based on the receiving position of the DCI. This dynamic approach allows the system to adapt to different transmission scenarios while maintaining a relatively simple DCI format structure.
Data Source
AI summary
This application provides a communication method and a communication apparatus. The communication method includes: receiving first DCI at a first receiving position in at least one receiving position, where the first DCI includes first information, the first information indicating time domain resource allocation, and the at least one receiving position is located in a same slot; performing transmission of a data channel, with the network device, on an ith first-type time domain resource in M first-type time domain resources, where a difference between the ith first-type time domain resource and an ith reference symbol is equal to a starting symbol of an ith time domain resource in a first time domain resource set, a length of the ith first-type time domain resource is equal to a length of the ith time domain resource in the first time domain resource set.