User Equipment Uplink Resource Fallback for Low-Power Transmission
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Solution Overview
Problem
Existing wireless communication technologies face challenges in efficiently managing uplink data transmission in User Equipment (UE) to reduce power consumption, particularly in idle states, and handling transitions between different transmission modes and mobility scenarios.
Innovation Solution
The implementation of pre-configured uplink resources allows UE to transition between different transmission modes and handle mobility scenarios efficiently, reducing power consumption by using dedicated or shared resources and fallback mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE enters RRC connected state to transmit uplink data, then reliable data transmission is ensured, but power consumption increases and transmission efficiency decreases
Solution Approach 1:
The network pre-configures uplink resources for the UE in idle state before actual data transmission is needed. This allows the UE to directly use these pre-allocated resources for uplink data transmission without entering RRC connected state, thereby reducing power consumption while ensuring reliable transmission through network-controlled resource allocation.
2Productivity
If UE uses pre-configured uplink resources in idle state, then power consumption is reduced and transmission efficiency is improved, but handling of transmission mode transitions and mobility scenarios becomes complex
Solution Approach 1:
The network monitors the UE's transmission status and provides feedback through downlink messages. When the UE needs to transition from pre-configured resource transmission to RRC connected state, or when mobility events occur, the network detects these conditions and sends appropriate control messages to coordinate the mode transition, thereby managing complexity centrally rather than requiring complex UE-side decision logic.
Solution Approach 2:
The system dynamically allows UE to switch between different transmission modes (pre-configured resource mode, EDT mode, and RRC connected mode) based on current conditions. The UE can flexibly transition between these modes depending on data size, channel conditions, and network state, optimizing performance while adapting to changing requirements.
3Loss of information
If UE uses pre-configured uplink resources, then signaling overhead is reduced, but handling of uplink synchronization and resource validity becomes complex
Solution Approach 1:
The network provides feedback through downlink control messages to indicate whether pre-configured uplink resources remain valid or have expired. This feedback mechanism allows the UE to maintain uplink synchronization without complex local timing calculations, as the network centrally manages resource validity and notifies the UE of any changes through standardized signaling channels.
Data Source
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AI summary
The present invention provides user equipment and a pre-configured uplink resource transmission method performed thereby. The pre-configured uplink resource transmission method performed by user equipment comprises the following steps: when upper layer data arrives at an access stratum of the UE, a Radio Resource Control (RRC) layer triggering an RRC procedure to confirm whether a condition for pre-configured uplink resource transmission is met, and if so, performing, by the RRC layer, an operation of pre-configured uplink resource data transmission; and when using a pre-configured uplink resource transmission mode, a Medium Access Control (MAC) layer verifying whether a pre-configured uplink resource is available, and if not, performing, by the UE, fallback to a data transmission mode in which pre-configured uplink resource data transmission is not used, so as to transmit the uplink data.