Radio Bearer Resumption via Paging for 5G Latency and Energy Trade-off
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing radio bearers during idle and inactive states, particularly in handling downlink transmissions and optimizing energy consumption in scenarios like early data transmission (EDT) for 5G use cases, which require low latency and high reliability.
Innovation Solution
A method for wireless devices to resume radio bearers upon receiving paging in idle or inactive states, allowing for efficient data transmission by resuming radio bearers specifically for downlink transmissions and optimizing energy usage through controlled state transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the wireless device maintains radio bearers in idle or inactive states to enable fast data transmission, then the latency is reduced, but the energy consumption increases
Solution Approach 1:
The patent implements dynamic radio bearer management where bearers are automatically resumed from idle/inactive states upon receiving paging messages, and suspended when no data transmission is needed. This dynamic state transition allows the system to adapt between low-latency connected mode and low-power idle mode, resolving the contradiction between maintaining bearers for fast transmission and releasing them for energy savings
Solution Approach 2:
The system changes the operational state parameter of radio bearers between active, suspended, and released states based on data transmission requirements. When data transmission is anticipated (paging received), bearers transition from suspended to active state, reducing latency. When no transmission is needed, they transition to released state, reducing energy consumption
2Use of energy by moving object
If the wireless device frequently transitions between idle/inactive and connected states for data transmission, then the energy efficiency is improved, but the service availability decreases
Solution Approach 1:
The patent implements preliminary action by pre-resuming radio bearers upon receiving paging messages that indicate upcoming data transmission. This allows the device to prepare the radio bearer configuration in advance before actual data transmission begins, ensuring service availability is maintained while minimizing the duration of high-power connected state, thus improving energy efficiency
Solution Approach 2:
The paging message serves as an intermediary signal that triggers radio bearer resumption. Instead of directly transitioning to connected state upon data arrival, the system uses paging as an intermediate notification mechanism, allowing the device to prepare bearers in advance and transition smoothly, maintaining service availability while optimizing energy consumption
Data Source
AI summary
A method and apparatus for start and stop of reception of downlink (DL) transmission based on a paging in a wireless communication system is provided. A wireless device, upon receiving a paging, resumes a radio bearer in an idle state (e.g., RRC_IDLE) and/or an inactive state (e.g., RRC_INACTIVE).