Multi-network convergence transmission method, transmission system and computer readable storage medium

Abstract

The invention belongs to the technical field of multi-network convergence transmission, and discloses a multi-network convergence transmission method, a multi-network convergence transmission system and a computer readable storage medium. A sender allocates a certain number of LLC frames to each link in turn according to the bandwidth ratio of each link; a receiver redundantly sends the same LLC receiving state control frame on a plurality of links; and the sender performs duplication elimination on the LLC receiving state control frame according to the received serial number field of the LLCreceiving state control frame, and judges whether negative confirmation in the fed-back LLC receiving state control frame is valid or not. According to the multi-network fusion transmission ARQ methodprovided by the invention, the bandwidth of each network is fused, large-bandwidth transmission is realized, accurate retransmission is carried out under the condition of packet loss of individual links to reduce packet loss, and unnecessary retransmission caused by different time delays of each link is reduced.

Description

technical field [0001] The invention belongs to the technical field of multi-network fusion transmission, and in particular relates to a multi-network fusion transmission method, a transmission system and a computer-readable storage medium. Background technique [0002] Currently, traditional automatic repeat requests are divided into three types, namely, stop-and-wait ARQ, go-back-n ARQ, and selective repeat ARQ. The latter two protocols are a combination of sliding window technology and request retransmission technology. When the window size is large enough, frames can flow continuously on the line, so they are also called continuous ARQ protocols. The difference between the three lies in the different processing mechanisms for error data packets. Among the three ARQ protocols, the complexity increases and the efficiency also increases. In addition to traditional ARQ, there is hybrid ARQ (Hybrid-ARQ). [0003] (1) Stop-equation ARQ [0004] In stop-and-equate ARQ, afte...

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Problems solved by technology

Among the three ARQ protocols, the complexity increases and the efficiency also increases

This head-of-the-line effect (Head of the Line) prevents the transmission of b-stream, causing the delay of b-stream

[0027] (2) Data burst: In reordering, when the wrong frame is retransmitted and received correctly, all the frames waiting for it are released together and forwarded to the upper layer at the same time. This kind of burst data may reduce QoS, or because the forwarding node packet loss due to buffer overflow

[0028] (3) Due to the delay and data burst caused by reordering, jitter will inevitably occur, which is not conducive to real-time multimedia service transmission

[0029] (4) Buffer burden: When the link status is not good, the delay is large, there are many receivers and the source is far away, the sender cannot receive the ACK, and the sorted data must always occupy the send buffer. the burden will be too heavy

[0030] Through the above analysis, the existing problems and defects of the prior art are: (1) the existing selective ARQ technology must preserve the complete order of the data frames in the reordering. The frame should be kept until the wrong frame; until it is retransmitted and received correctly, it will bring a large delay

[0031] (2) In reordering, when the wrong frame is retransmitted and correctly received, all the frames waiting for it are released together and forwarded to the upper layer at the same time. This burst data may reduce QoS, or due to the buffer overflow of the forwarding node resulting in packet loss

[0032] (3) Due to the delay and data burst caused by reordering, jitter will inevitably occur, which is not conducive to real-time multimedia service transmission

[0033] (4) Buffer burden: When the link status is not good, the delay is large, there are many receivers and the source is far away, the sender cannot receive the ACK, and the sorted data must always occupy the send buffer. the burden will be too heavy

[0035] The problem with the above related technologies is that the data transmission uses a single network transmission, and when network fluctuations cause packet loss and retransmission, the retransmission will still be carried out on the current link, resulting in an increasing load on the link. , such a vicious cycle will lead to network congestion and affect the user's online experience

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