Paging Message Segmentation for Small Data Transmission Latency
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in handling small data transmissions, particularly in managing paging messages for wireless devices, which can lead to increased latency and resource utilization.
Innovation Solution
A method for a base station Central Unit (CU) that receives a paging message with parameters for a small data transmission (SDT) procedure and transmits a second paging message to a distributed unit (DU) with an indicated SDT procedure, optimizing the handling of small data transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional paging procedures are used for small data transmissions, then reliability is maintained, but latency increases and resource utilization deteriorates
Solution Approach 1:
The paging procedure is segmented into two distinct message types: a first paging message for traditional full connection establishment, and a second paging message for optimized small data transmission. This segmentation allows the system to select the appropriate procedure based on data size requirements, reducing latency for small data while maintaining reliability for larger transmissions.
Solution Approach 2:
The second paging message includes pre-configured SDT parameters and indicators that enable the wireless device to immediately initiate small data transmission without undergoing the complete connection establishment procedure. This preliminary configuration reduces latency by preparing transmission parameters in advance.
2Reliability
If traditional paging procedures are used for small data transmissions, then reliability is maintained, but device complexity and network complexity increase
Solution Approach 1:
The paging mechanism is divided into two distinct message formats with different parameter sets. The first paging message maintains traditional reliability procedures, while the second paging message implements a simplified procedure for small data. This segmentation allows devices to use the simpler second message for small data transmissions, reducing device complexity while maintaining reliability through the availability of the first message for larger data.
Solution Approach 2:
The second paging message implements a partial procedure for small data transmission, including only the essential parameters needed for immediate transmission rather than the complete connection establishment sequence. This partial action reduces device complexity by eliminating unnecessary steps for small data while maintaining sufficient reliability through the preserved first message option.
3Reliability
If traditional paging procedures are used for small data transmissions, then reliability is maintained, but network complexity and resource consumption increase
Solution Approach 1:
The network implements two distinct paging message formats with different parameter structures. The first message maintains traditional reliability procedures, while the second message provides an optimized path for small data. This segmentation reduces network complexity by providing a streamlined procedure for the common case of small data transmissions while preserving the reliable traditional path when needed.
Solution Approach 2:
The second paging message changes key parameters by including pre-configured SDT parameters and transmission indicators that enable immediate small data transmission. This parameter change simplifies the network procedure for small data by eliminating the need for multiple configuration exchanges, reducing network complexity while maintaining reliability through the preserved first message option.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
A base station central unit (CU) receives, from a network device, an indication of a size of downlink data for a wireless device. The base station CU transmits, to a base station distributed unit (DU), a first paging message for the wireless device. The transmitting is based on the size of the downlink data. The first paging message indicates at least one of a small data transmission (SDT) procedure of the wireless device and the size of the downlink data.