## 5 Conclusions  
With the development of edge computing, there is an increasing need for edge servers to collaboratively process data, accelerate data transmission, and reduce latency. This paper evaluates the strengths and weaknesses of the sliding window RDMA transmission mechanism, particularly in relation to the multitasking requirements of the current edge computing environment and the asymmetry inherent in RDMA's unilateral operations. To address the shortcomings of the existing RDMA transmission mechanism, we propose an RDMA data transmission mechanism based on status byte. The proposed status-byte-assisted RDMA transmission mechanism modifies the data transmission and synchronization methods of the sliding window RDMA transmission mechanism. By utilizing the unique properties of status-byte-assisted RDMA transmission to precisely control memory blocks, it provides a solution for multitasking processing and is well-suited \begin{table}
\begin{tabular}{c c c} \hline \hline
**Comparison Dimension** & **Sliding Window-Based Mechanism** & **Status-Byte-Assisted Mechanism** \\ \hline Synchronization Control & High, especially due to delays introduced by & Low, using RDMA Read for unidirectional \\ Latency & ACK processing. & synchronization, significantly reducing \\  & & control latency. \\ \hline Transmission Latency & High, involves bidirectional operations and & Low, optimized transmission method using \\  & processing of ACKs. & unilateral transmission. \\ \hline Throughput & High, but performs poorly with small & High, especially for small packets, \\  & packets, limiting throughput. & significantly improving throughput. \\ \hline CPU Utilization & High, need to create and manage additional & Low, reduces CPU utilization by using \\  & ACK receiving threads. & one-sided operations. \\ \hline RNIC Resource Consumption & High, requires bidirectional communication. & Low, one-sided operation and stateless \\  & & connections reduce resource consumption. \\ \hline Memory Block Management & Sequential processing, less suited for parallel & Flexible handling, allows independent \\  & characteristics & data transmission. & management of each memory block and \\  & & supports parallel processing. \\ \hline Limitations & Poor performance with small packets, & Additional checks of status bytes may \\  & limiting throughput. & increase CPU resource consumption. \\ \hline Applicable Scenarios & Suitable for general data transmission and & Suitable for multi-task data transmission \\  & supports basic transmission needs. & scenarios, especially video streaming. \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Comparative analysis of RDMA transmission mechanisms. for transmitting real-time video streams. Finally, we provide extensive experimental results to validate the performance of the status-byte-assisted RDMA transmission mechanism. Experimental analysis results demonstrate that the proposed status-byte-assisted RDMA transmission mechanism improves all performance metrics compared to the sliding window RDMA transmission mechanism. First, in terms of transmission latency and throughput, when transmitting data packets ranging from 64 B to 8 MB, the status-byte-assisted RDMA transmission mechanism reduces latency by 2 ns to 3.4 us compared to the sliding window scheme, and its throughput exceeds that of the sliding window scheme for packet sizes up to 1 MB. Notably, for 256 B packets, the status-byte-assisted RDMA transmission mechanism achieves a throughput 4.6 times higher than the sliding window scheme. Second, in terms of resource utilization, experimental results show that the status-byte-assisted RDMA transmission mechanism reduces average CPU utilization by 20% under the same workload, while minimizing RNIC resource consumption. Lastly, the status-byte-assisted RDMA transmission mechanism exhibits exceptional flexibility in memory block transmission and support for multitasking, exhibiting greater stability and higher throughput in multitasking scenarios.