Paging-Scheduled Downlink Data Transmission Without Full RRC Setup
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Solution Overview
Problem
Conventional RRC connection establishment procedures for downlink data transmission in communication scenarios like MTC and NB-IoT result in high radio resource utilization, delayed data transmission, and increased power consumption due to excessive signaling overheads for small data packets with uncertain arrival times.
Innovation Solution
A data transmission method that utilizes downlink control information (DCI) to schedule paging messages with indication information, allowing terminals to receive downlink data without full RRC connection setup, thereby reducing signaling overheads and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional RRC connection establishment procedure is used for downlink data transmission, then reliable data transmission is ensured, but signaling overhead increases and transmission delay increases
Solution Approach 1:
The patent performs preliminary actions by pre-establishing RRC connections and configuring bearers before downlink data arrives. When data needs to be transmitted, the connection is already in place, eliminating the need for RRC connection establishment procedures. This preliminary setup reduces signaling overhead and transmission delay while ensuring reliable data transmission through properly configured bearers.
2Reliability
If conventional RRC connection establishment procedure is used for downlink data transmission, then data transmission is ensured, but transmission delay increases
Solution Approach 1:
The patent performs preliminary actions by pre-establishing RRC connections and configuring bearers before downlink data arrives. When data needs to be transmitted, the connection is already in place, eliminating the need for RRC connection establishment procedures. This preliminary setup reduces signaling overhead and transmission delay while ensuring reliable data transmission through properly configured bearers.
3Use of energy by moving object
If terminal monitors paging message for downlink data indication, then power consumption is reduced, but resource utilization decreases
Solution Approach 1:
The patent performs preliminary actions by pre-establishing RRC connections and configuring bearers before downlink data arrives. When data needs to be transmitted, the connection is already in place, eliminating the need for RRC connection establishment procedures. This preliminary setup reduces signaling overhead and transmission delay while ensuring reliable data transmission through properly configured bearers.
Data Source
AI summary
A method and an apparatus are provided. The method includes: An access network device sends DCI for a paging message to a terminal device, where the DCI includes scheduling information for downlink data. The access network device further sends first indication information included in the paging message to the terminal device, wherein the first indication information indicates that first downlink data corresponds to the terminal device. Therefore, when determining that there is downlink data to arrive, the terminal device determines a time-frequency location of the downlink data based on the scheduling information that is for the downlink data and that is in the DCI, and then receives the downlink data at the time-frequency location. According to the method and the apparatus provided in this application, a small amount of downlink data is transmitted, resource utilization is improved, and power consumption of the terminal device is reduced.