Wireless Network Data Transmission Buffer Management
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Solution Overview
Problem
In wireless communication networks, devices in RRC inactive states face challenges with power consumption and data transmission latency, leading to potential buffer overflow issues due to long eDRX cycles, which affect both the UE and base station's buffering capabilities.
Innovation Solution
The method involves coordinating between the base station and core network to manage data transmission by using configuration information to determine when to transmit data or initiate paging procedures, employing implicit and explicit triggering mechanisms, and implementing fallback mechanisms to prevent buffer overflow, thereby reducing latency and optimizing buffering capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If wireless devices use long eDRX cycles for power saving, then energy consumption is reduced, but data transmission latency increases and buffer overflow risk increases
Solution Approach 1:
The network elements perform preliminary actions by proactively transmitting data or paging requests to devices in RRC inactive state before the device wakes up from its sleep period. This allows the device to remain in low-power mode longer while the network prepares and delivers data during the device's inactive periods, thereby reducing latency without requiring the device to wake up more frequently.
Solution Approach 2:
The patent introduces network elements (base station, core network) as intermediaries that manage data buffering and transmission timing. These intermediaries hold data in buffers and strategically transmit it during device inactive periods, decoupling the device's wake-up schedule from data arrival timing. This mediator approach allows long eDRX cycles for power saving while maintaining low latency through network-side data management.
2Use of energy by moving object
If wireless devices stay in sleep mode for energy saving, then power consumption is reduced, but the capability to meet low latency requirements deteriorates
Solution Approach 1:
Network elements perform preliminary data preparation and buffering actions while the device is in sleep mode. The base station or core network holds data in buffers and transmits it during the device's inactive periods, ensuring data is ready before the device wakes up. This preliminary action allows the device to maintain deep sleep states for power saving while the network ensures low-latency data delivery is prepared in advance.
Solution Approach 2:
The system implements feedback mechanisms where network elements monitor device states, buffer status, and transmission timing. Based on this feedback, the network dynamically adjusts data transmission timing and buffer management strategies to ensure low latency requirements are met while devices remain in power-saving modes for extended periods.
3Productivity
If network elements coordinate to utilize buffering capabilities, then data transmission efficiency is improved, but system complexity increases
Solution Approach 1:
The patent designates specific network elements as intermediaries with buffering capabilities that centralize data management functions. Instead of complex coordination between multiple elements, a designated buffer holder (base station or core network) manages data storage and transmission timing. This intermediary approach improves data transmission efficiency by strategically delivering data during device inactive periods while avoiding the complexity of multi-element coordination through centralized buffer management.
Data Source
AI summary
This disclosure relates generally to a method, device, and system for congestion control in a wireless network. One method performed by a first network element is disclosed. The method may include receiving, from a second network element, a configuration information of a wireless device, the wireless device being in a Radio Resource Control (RRC) inactive state; and in response to that there is data for the wireless device pending to be transmitted to the wireless device, transmitting, to the second network element, based on the configuration information, one of following: the data for the wireless device; or a paging request for paging the wireless device.