Data transmission method and system based on two-layer multi-path flow control and medium
A data transmission method and data transmission technology are applied in the field of data transmission based on layer-2 multi-path flow control, which can solve problems affecting practicality, high cost, and complexity of the layer-2 link layer, and achieve low computational complexity and high transmission efficiency. Optimized effect
Pending Publication Date: 2022-06-07
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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Problems solved by technology
This mechanism relies on the feedback of the ECN label at the network layer, and is not suitable for Layer 2 multipath scenarios below the network layer.
In addition, the mechanism based on the sliding window is too complicated for the layer 2 link layer, and the cost of hardware implementation is too high, which affects the practicability of the scheme
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[0037] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to qualify the present invention.
[0038] The present invention proposes a data transmission method based on two-layer multipath flow control, the present invention is mainly to adopt a new two-layer multipath flow control method, for remote zero-copy transmission scenarios in an Ethernet environment, by controlling and coordinating the transmission rate of remote zero-copy tasks on multiple paths to achieve packet-free data transmission and network bandwidth maximization application, the two-layer multipath flow control method employed in the present invention, for remote zero-copy applications the need to extend the credit-based single-path flow control mechanism to multi-path scenarios, Compared with the multipath flow control scheme based on sliding congestion window, its mechanism is simpler, the implementation cost is lower, and i...
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The invention provides a data transmission method and system based on two-layer multi-path flow control and a medium, and the method comprises the steps: when a plurality of paths exist between a transmitting device and a receiving device, the receiving device reports a receivable data limit on an available path to the transmitting device through the selected available path; the sending device selects one or more paths according to the situation, and sends data within the data limit on the selected available path; after receiving a part of data, the receiving equipment confirms the received data volume to the sending equipment, and confirms a new receivable data limit on the selected available path; and after receiving the new receivable data limit on the selected available path, the sending equipment releases the limit with the corresponding size on the path, performs path selection again and sends the data until all the data are sent. According to the invention, data transmission without packet loss and maximum application of network bandwidth are realized by controlling and coordinating the transmission rate of the remote zero copy task on multiple paths.
Description
Technical field [0001] The present invention relates to the field of data transmission technology, in particular to a data transmission method, system and medium based on two-layer multipath flow control. Background [0002] Remote zero copy technology can realize the rapid transfer of data between network nodes, and the entire transmission process does not require the intervention of the operating system, CPU, and network software stack, and realizes low-latency and high-bandwidth data transmission through the direct transmission of memory data, without consuming the computing resources of the node. The representative technology that currently provides remote zero-copy capabilities is Remote Direct Memory Access (or RDMA). RDMA has three different hardware implementations. They are InfiniBand, iWarp (internet Wide Area RDMA Protocol), and RoCE (RDMA overConverged Ethernet). Among them, Infiniband is a network designed for RDMA to guarantee reliable transmission from the hardware...
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IPC IPC(8): H04L47/20
CPCH04L47/20
Inventor 李大刚林信南
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL