Uplink sTTI Transmission Resource Allocation
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Solution Overview
Problem
Existing LTE systems lack a method to implement multiple shortened Transmission Time Intervals (TTIs) within a single subframe, which hinders efficient uplink transmission and user-plane delay performance.
Innovation Solution
The proposed solution involves configuring frequency-domain resource information and scheduling information for uplink Shortened Physical Uplink Shared Channel (sPUSCH) and Shortened Physical Uplink Control Channel (sPUCCH) transmissions within a subframe, ensuring consistent resource size and position to reuse existing time templates and avoid transient periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If multiple sTTI transmissions are implemented within one subframe, then user-plane delay performance is improved, but the system complexity increases due to lack of specific implementation methods
Solution Approach 1:
The patent segments the uplink transmission into multiple sTTI transmissions within a single subframe. Each sTTI is assigned specific frequency-domain resources (resource blocks) and time-domain positions, allowing parallel or sequential short transmissions. This segmentation enables reduced user-plane delay by breaking one long transmission into multiple shorter ones, while maintaining manageable system complexity through structured resource allocation.
Solution Approach 2:
The patent introduces dynamic resource allocation mechanisms where the network can flexibly configure frequency-domain resources and time-domain positions for each sTTI transmission based on traffic conditions. The resource block assignments and sTTI lengths can be adjusted dynamically, allowing the system to adapt to varying delay requirements and traffic patterns without fixed rigid structures.
2Adaptability or versatility
If frequency-domain resources are dynamically allocated for multiple sPUCCHs/sPUSCHs, then transmission flexibility is improved, but transient periods are introduced between sTTIs
Solution Approach 1:
The patent applies preliminary action by pre-configuring frequency-domain resources (resource blocks) for multiple sPUCCH and sPUSCH transmissions before the actual sTTI transmissions occur. The network provides resource allocation information in advance through downlink control information, allowing the terminal to prepare the frequency resources beforehand. This prevents transient periods by ensuring resources are ready before each sTTI transmission starts, maintaining transmission flexibility through pre-planned resource assignments.
Solution Approach 2:
The patent uses downlink control information as an intermediary mechanism to coordinate resource allocation between the network and terminal. The DCI carries resource allocation information that mediates the resource assignment for multiple sPUCCH/sPUSCH transmissions, enabling flexible resource distribution without direct complex interactions between transmission elements, thereby avoiding transient periods.
3Productivity
If multiple sPUCCH/sPUSCH transmissions are allowed in one subframe, then uplink transmission efficiency is improved, but resource management complexity increases
Solution Approach 1:
The patent applies local quality by assigning specific frequency-domain resources (different resource blocks) to different sPUCCH and sPUSCH transmissions within the same subframe. Each transmission gets dedicated local frequency resources, allowing multiple transmissions to occur simultaneously or sequentially without interfering with each other. This local resource differentiation enables high uplink transmission efficiency while keeping resource management manageable through localized resource assignments rather than global reconfiguration.
Data Source
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AI summary
The application provides an uplink transmission method, a network side device and a terminal. The uplink transmission method includes that a terminal receives first configuration information at a first-time-domain position, and receives second configuration information at a second-time-domain position, in which the first configuration information indicates frequency-domain resource information of an uplink shortened Transmission Time Interval (sTTI) transmission performed by the terminal at a third-time-domain position, and the second configuration information indicates scheduling information for the uplink sTTI transmission performed by the terminal at the third-time-domain position; and the terminal performs the uplink sTTI transmission at the third-time-domain position, according to the first and second configuration information.