Terminal Uplink Transmission Control for SPS Resource Efficiency
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Solution Overview
Problem
In mobile communication systems, particularly in LTE networks, there is a inefficiency in resource allocation as UE is forced to perform uplink transmissions even when there is no data to transmit, leading to unnecessary battery consumption and increased latency due to pre-scheduling mechanisms.
Innovation Solution
Implementing a method where UE is allocated resources but only performs uplink transmission when data is available, using conditional transmission operations based on RRC messages to optimize resource usage and reduce unnecessary transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If UE performs pre-scheduling uplink transmission even without data to transmit, then resource allocation is simplified and network scheduling is easier, but battery consumption increases and resource efficiency decreases
Solution Approach 1:
The patent applies dynamics by making the uplink transmission behavior adaptable rather than fixed. The UE dynamically determines whether to transmit based on the presence of data in the buffer, transitioning between transmission and non-transmission states based on real-time conditions, thereby optimizing energy consumption while maintaining network scheduling flexibility.
Solution Approach 2:
The patent changes the transmission parameter from a fixed state (always transmit when granted) to a conditional state (transmit only when data is available). This parameter change allows the system to balance between simplified network scheduling and reduced battery consumption by introducing a data availability check as a new control condition.
2Ease of operation
If UE performs pre-scheduling uplink transmission even without data to transmit, then resource allocation is simplified, but resource efficiency decreases due to unnecessary transmissions
Solution Approach 1:
The system dynamically adjusts transmission behavior based on data buffer status. When data is available, normal transmission occurs maintaining resource efficiency. When no data is available, transmission is skipped, preventing waste of uplink resources and improving overall resource efficiency while keeping resource allocation mechanisms simple.
Solution Approach 2:
The transmission decision parameter is changed from unconditional to conditional based on data availability. This modification ensures that uplink resources are only consumed when necessary, improving resource efficiency without complicating the resource allocation framework, as the base station still maintains full control over grant allocation.
3Productivity
If UE performs uplink transmission when allocated resources, then resource pre-allocation is effective, but latency increases due to unnecessary transmissions
Solution Approach 1:
The transmission timing is made dynamic based on data availability. Instead of fixed periodic transmissions that increase latency, the system adapts transmission timing to actual data needs, eliminating unnecessary transmission delays and reducing overall latency while maintaining the effectiveness of pre-allocation when data is present.
Solution Approach 2:
The transmission execution parameter is changed from always-transmit to transmit-when-data-available. This parameter modification eliminates unnecessary transmission cycles and their associated latency, while preserving resource pre-allocation effectiveness by maintaining the grant-based allocation mechanism for when data actually requires transmission.
Data Source
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AI summary
A communication method and a terminal and a base station adapted to the method are provided. The communication method of a terminal includes: receiving a message containing information regarding a semi-persistent scheduling (SRS) configuration from a base station; determining whether a sub-frame configured with a non-adaptive re-transmission is identical to a sub-frame configured with an uplink grant according to the SPS configuration; and when: a sub-frame configured with a non-adaptive re-transmission is identical to a sub-frame configured with an uplink grant according to the SPS configuration; and the terminal does not have data to be first transmitted via the sub-frame configured with an uplink grant according to the SPS configuration, performing the non-adaptive re-transmission.