Terminal Multi-TTI Random Access Data Transmission
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Solution Overview
Problem
In wireless communication systems, particularly in UMTS, the current random access process results in a significant transmission delay when a terminal needs to send a large data packet, as it can only transmit data within one transmission time interval (TTI), necessitating multiple random access processes, which increases delay.
Innovation Solution
A terminal sends first indication information to a base station to transmit data across multiple TTIs in a single random access process, allowing the base station to determine and allocate resources accordingly, potentially using a dedicated physical control channel (DPCCH) for indication, enabling efficient data transmission without allocating the code channel to other terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the terminal transmits data in a single TTI within one random access process, then the random access process is simple and quick, but the transmission delay increases when large data packets need to be sent
Solution Approach 1:
The patent segments the data transmission into multiple TTIs within a single random access process. The terminal transmits data in the first TTI, then continues transmitting in subsequent TTIs without initiating a new random access process. This segmentation allows large data packets to be transmitted efficiently while maintaining the simplicity of the random access procedure.
Solution Approach 2:
The terminal performs preliminary action by sending indication information to the base station before actually transmitting data. This indication information informs the base station that the terminal will transmit data across multiple TTIs, allowing the base station to prepare resources in advance and allocate the code channel appropriately, thus reducing transmission delay.
2Quantity of substance
If the terminal performs multiple random access processes to transmit large data packets, then the data can be transmitted completely, but the transmission delay increases significantly
Solution Approach 1:
The patent merges multiple TTIs into a single random access process. Instead of initiating separate random access processes for each TTI, the terminal combines multiple TTI transmissions into one continuous process after the initial random access, thereby reducing the overall transmission delay while maintaining the ability to send large data packets.
Solution Approach 2:
The patent ensures continuity of useful action by allowing the terminal to transmit data continuously across multiple TTIs without interruption or re-initiation of random access processes. The terminal transmits data in the first TTI and continues in subsequent TTIs, maintaining continuous data transmission and avoiding the delays associated with multiple random access processes.
3Productivity
If the base station allocates code channel to multiple terminals simultaneously, then resource utilization is high, but the terminal cannot guarantee exclusive access for multiple TTIs
Solution Approach 1:
The terminal sends indication information to the base station as a preliminary action, informing the base station that the terminal will transmit data across multiple TTIs. This allows the base station to reserve the code channel for the terminal in advance and allocate resources appropriately, ensuring reliable exclusive access while maintaining efficient resource utilization.
Solution Approach 2:
The base station receives indication information from the terminal and provides feedback by allocating resources accordingly. This feedback mechanism ensures that the code channel is allocated exclusively to the terminal for multiple TTIs, guaranteeing reliable data transmission while the base station manages resource allocation efficiently across multiple terminals.
Data Source
AI summary
The present invention relates to wireless communications technologies, and in particular, to a terminal, a network device, and a data transmission method in a random access process, so as to resolve a current problem that a transmission delay is relatively long when a terminal transmits a relatively large data packet in a random access process. In the terminal a processing module, is configured to determine that the terminal transmits data of multiple TTIs to a base station in a current random access process; and a transceiver module is configured to send first indication information to the base station, where the first indication information is used to indicate that the terminal transmits the data of the multiple TTIs in the current random access process. In this way, the terminal can transmit data of multiple TTIs in one random access process.