Small Data Transmission via Paging Message Multiplexing
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Solution Overview
Problem
In LTE or LTE-advanced systems, the process of transmitting small data to user equipment (UE) in an RRC_IDLE or out-of-synchronization mode is inefficient due to the need for a paging process and control plane connection recovery, leading to high signaling overheads and resource waste, especially in machine-to-machine communication scenarios where data volumes are small.
Innovation Solution
A method where a base station broadcasts a paging message carrying UE identifiers and small data, allowing for efficient transmission by reducing signaling overheads and improving communication efficiency, with options for arranging and parsing data based on preset rules or indication information to manage varying data lengths and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station uses the traditional paging process and control plane connection recovery to transmit small data to UE in RRC_IDLE mode, then the UE can reliably receive the data, but the signaling overhead increases and transmission time increases
Solution Approach 1:
The patent combines the paging message and small data transmission into a single channel (PDSCH). The base station multiplexes small data with the paging message, allowing UE to receive both the paging notification and the actual data in one reception operation, thereby eliminating the need for separate control plane connection recovery procedures and reducing transmission time while maintaining reliability
Solution Approach 2:
The paging channel is enhanced to serve dual purposes: traditional paging notification and small data transmission. By making the paging message capable of carrying both control information and user data, the system eliminates the need for separate data transmission channels for small data packets, reducing signaling overhead and transmission time
2Reliability
If the base station uses the traditional paging process and control plane connection recovery to transmit small data to UE, then the data can be transmitted reliably, but the signaling overhead increases
Solution Approach 1:
The patent merges the paging signaling and data transmission signaling into a single PDSCH transmission. By multiplexing small data with the paging message, the system eliminates redundant signaling procedures such as random access preamble transmission, RRC connection setup, and data scheduling requests, thereby significantly reducing signaling overhead while maintaining transmission reliability
Solution Approach 2:
The patent extracts small data transmission from the traditional control plane connection recovery process and integrates it directly into the paging message transmission path. This extraction allows small data to be delivered through the more efficient data plane (PDSCH) rather than the cumbersome control plane, reducing signaling overhead while preserving reliability
3Reliability
If the base station transmits small data using the traditional connection recovery process, then the UE can receive the data, but the communication cost increases due to excessive signaling interaction
Solution Approach 1:
The patent combines paging notification and small data transmission into a single PDSCH operation, allowing UE to receive both in one step. This merging eliminates multiple separate signaling interactions including random access procedures, RRC connection setup, and data scheduling, thereby improving communication efficiency (productivity) while ensuring data reception reliability through the robust paging mechanism
4Reliability
If the base station sends small data to UE in RRC_IDLE mode through traditional procedures, then the data transmission can be completed, but the resource utilization decreases due to waste of radio resources
Solution Approach 1:
The patent merges small data transmission with the mandatory paging message transmission, both utilizing the PDSCH resource. This combination allows the system to deliver small data using the same radio resources already allocated for paging, eliminating the need for additional dedicated data transmission resources and thereby improving radio resource utilization while ensuring reliable delivery
Data Source
AI summary
The embodiments of the present disclosure disclose a small data transmission method and a related device and system. The method may include: broadcasting, by a base station, a paging message, where the paging message carries UE identifiers of a plurality of to-be-paged user equipment UE and small data sent to at least one of the to-be-paged UEs, and the small data is data whose data volume is less than a preset data volume threshold. In the present disclosure, small data may be sent to to-be-paged UE while the base station pages the UE, to reduce signaling and time overheads for sending the small data and improving communication efficiency.