TTI Classification for Uplink Data Transmission in HSUPA
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Solution Overview
Problem
In High Speed Uplink Packet Access (HSUPA) systems, the existing data transmission methods waste resources and lack flexibility due to frequent scheduling grant commands needed for high-speed data users, leading to inefficient data transmission.
Innovation Solution
Classifying transmission time intervals (TTIs) into Time Division Multiplexing (TDM) and Code Division Multiplexing (CDM) TTIs based on a TTI classification, and sending control information to user equipment (UE) to instruct data transmission in either mode, reducing the need for frequent scheduling grants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequent scheduling grant commands are sent to high-speed data users, then data transmission flexibility is improved, but transmission resources are wasted
Solution Approach 1:
The patent segments the uplink transmission resources into different TTI types (first TTI for TDM scheduling, second TTI for CDM scheduling) and assigns different scheduling mechanisms to each segment. This allows the system to reduce frequent scheduling grants for TDM users while maintaining flexibility through CDM scheduling in the second TTI, thereby resolving the contradiction between transmission flexibility and resource waste.
2Productivity
If TDM scheduling mode is used for high-speed data users, then throughput is improved, but interference with low-speed users in the same timeslot increases
Solution Approach 1:
The patent divides the uplink transmission resources into different TTI types, with first TTI dedicated to TDM scheduling for high-speed users and second TTI dedicated to CDM scheduling. This temporal segmentation separates high-speed and low-speed user transmissions into different time resources, eliminating interference between them while maintaining high throughput for TDM users.
Data Source
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Figure 1b
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AI summary
The present invention discloses a data transmission method and apparatus, and a user equipment. The method includes: classifying, by using a transmission time interval TTI as a classification basis, TTIs on a carrier in a cell into a time division multiplexing TDM TTI and a code division multiplexing CDM TTI; and sending, to a user equipment UE, control information carrying a classified result, so as to instruct the UE to send uplink data according to the classified result and a data scheduling type of the UE in the TDM TTI or the CDM. By using the foregoing technical solution, a data transmission resource can be well saved and scheduling flexibility can be improved.