Relay Communication Control With Pre-Emptive Buffer State Reports
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Solution Overview
Problem
Existing relay apparatuses in mobile communication systems fail to accurately allocate uplink radio resources due to insufficient consideration of potential untransmitted upstream data, leading to delays and shortages in data transmission.
Innovation Solution
Implementing a pre-emptive buffer state report (BSR) mechanism that accounts for both the relay apparatus's and the lower apparatus's untransmitted upstream data, allowing the upper apparatus to perform proactive scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the relay apparatus transmits only the first buffer state report from the lower apparatus, then the uplink radio resource allocation is simple, but the allocation accuracy is insufficient leading to resource shortages and transmission delays
Solution Approach 1:
The relay apparatus performs preliminary actions by transmitting a pre-emptive buffer state report before the lower apparatus actually generates data for transmission. This allows the upper apparatus to allocate uplink radio resources in advance based on anticipated data needs, improving resource allocation accuracy and preventing resource shortages before they occur.
Solution Approach 2:
The relay apparatus acts as an intermediary between the lower apparatus and the upper apparatus. It receives buffer state information from the lower apparatus, processes it by adding its own buffer state data, and transmits the combined pre-emptive buffer state report to the upper apparatus. This intermediary role enables accurate aggregate buffer state reporting while maintaining system modularity.
2Loss of time
If the relay apparatus waits for actual data arrival before allocating resources, then the resource allocation process is simple, but transmission delays occur due to reactive rather than proactive scheduling
Solution Approach 1:
The system performs preliminary resource allocation based on the pre-emptive buffer state report before actual data arrives at the lower apparatus. The upper apparatus can prepare and allocate uplink radio resources in advance, eliminating waiting time and reducing transmission delays when data needs to be sent.
Solution Approach 2:
The mechanism implements feedback by having the lower apparatus report its buffer state to the relay apparatus, which then incorporates this information into the pre-emptive buffer state report sent to the upper apparatus. This feedback loop enables the upper apparatus to make informed proactive scheduling decisions that reduce transmission delays.
Data Source
AI summary
A communication control method used in a relay apparatus configured to relay upstream data from a lower apparatus to an upper apparatus. The communication control method comprises receiving a first buffer state report from the lower apparatus, the first buffer state report indicating an amount of the untransmitted upstream data of the lower apparatus; receiving a second buffer state report different from the first buffer state report, from the lower apparatus, the second buffer state report indicating an amount of untransmitted upstream data of a lower apparatus of the lower apparatus; and transmitting a pre-emptive buffer state report indicating an amount of untransmitted upstream data of the lower apparatus, to the upper apparatus. The pre-emptive buffer state report is based on the amount of the untransmitted upstream data indicated by the first buffer state report, out of the first buffer state report and the second buffer state report.