Uplink Data Transmission Using Extended Cyclic Prefix
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LTE networks face inefficiencies in uplink data packet transmission for terminal devices in RRC idle or out-of-synchronization states, leading to high power consumption and resource utilization issues due to the need for multiple signaling exchanges for discontinuous and low-throughput data packets, such as heartbeat packets, causing network congestion and signaling storms.
Innovation Solution
The method involves determining a cyclic prefix (CP) length for uplink data frames that is greater than the standard CP length, allowing terminal devices to send data packets directly without random access and synchronization procedures, by using CP lengths that account for round-trip delay and maximum delay spread, thereby optimizing resource utilization and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices in RRC idle or out-of-synchronization states use standard LTE procedures for uplink data transmission, then reliable data delivery is achieved, but signaling overhead increases and resource utilization decreases
Solution Approach 1:
The patent applies preliminary action by pre-configuring uplink resources and determining CP lengths before the terminal device needs to send data. The base station pre-allocates time-frequency resources and provides CP length configuration information to terminals in advance, so that when data needs to be transmitted, the terminal can directly use the pre-configured resources without performing random access and synchronization procedures, thereby reducing signaling overhead while ensuring reliable data delivery
Solution Approach 2:
The patent introduces an intermediary mechanism where the base station acts as a mediator that pre-configures and manages uplink resources for multiple terminal devices. The base station provides CP length configuration information and resource allocation to terminals, which then use these intermediate configurations to transmit data directly without going through the full random access procedure, thus reducing signaling overhead while maintaining reliable communication
2Reliability
If terminal devices perform random access and synchronization procedures before uplink data transmission, then uplink synchronization is achieved, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by having the base station pre-configure CP lengths and uplink resources before terminals need to transmit data. Terminals use these pre-configured parameters to maintain uplink synchronization without performing power-consuming random access and synchronization procedures each time data needs to be sent, thereby reducing power consumption while ensuring uplink synchronization is maintained
Solution Approach 2:
The patent implements periodic action by having terminals send uplink data packets at periodic intervals using pre-configured resources and CP lengths. Instead of performing synchronization procedures before each transmission, terminals periodically transmit data using the previously configured parameters, which reduces power consumption while maintaining synchronization through the periodic use of pre-configured timing parameters
3Reliability
If multiple terminal devices send heartbeat packets periodically, then service monitoring is achieved, but network congestion occurs
Solution Approach 1:
The patent applies segmentation by dividing the uplink transmission resources into specific time-frequency slots and allocating them to different terminal devices. Each terminal is assigned specific pre-configured resources for sending heartbeat packets, which segments the overall traffic and prevents network congestion while maintaining reliable service monitoring through organized resource allocation
Solution Approach 2:
The patent implements dynamics by allowing the base station to dynamically adjust and reconfigure uplink resources and CP lengths for terminal devices based on network conditions. The base station can update resource allocations and timing parameters to adapt to changing traffic patterns, ensuring efficient service monitoring while preventing network congestion through dynamic resource management
Data Source
Figure 1A
Figure 1B~2
Figure 3
AI summary
The present invention provides an uplink data packet transmission method, a terminal device, and a base station. The method includes: determining, by a terminal device, a CP length of a first uplink data frame; if the terminal device is in a state of out of uplink synchronization with a base station and in an RRC connected state, or is in an RRC idle state, generating, by the terminal device, the first uplink data frame for an uplink data packet according to the CP length, where the CP length of the first uplink data frame is greater than a CP length of an uplink data frame sent by a terminal device that is in a state of uplink synchronization and in an RRC connected state; and sending, by the terminal device, the first uplink data frame to the base station. According to the transmission method in the present invention, signaling procedures such as random access and uplink synchronization can be omitted, so that the terminal device can directly send the uplink data packet by performing signaling exchange once. This improves resource utilization, and reduces power consumption.