Multi-path transmission scheduling optimization method for vehicle-mounted heterogeneous network

A heterogeneous network and multi-path transmission technology, applied in the field of communication, can solve the problems affecting the communication performance of vehicles, blocking of receiving buffers, out-of-order data packets, etc., to achieve the effect of improving throughput and network utilization, and improving path selection.

Active Publication Date: 2019-02-15
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] However, the delay, bandwidth, load, packet loss rate and other factors between paths in the vehicle heterogeneous network are different from each other, and the default Round-Robin algorithm of the multipath transmission control protocol will cause data packets to be transmitted when using these paths to transmit resources. Out of order, which in turn causes the occurrence of receiving buffer blocking, and affects the communication performance between vehicles

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  • Multi-path transmission scheduling optimization method for vehicle-mounted heterogeneous network
  • Multi-path transmission scheduling optimization method for vehicle-mounted heterogeneous network
  • Multi-path transmission scheduling optimization method for vehicle-mounted heterogeneous network

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Embodiment Construction

[0047] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0048] A multi-path transmission scheduling optimization method for a vehicle-mounted heterogeneous network, comprising the following steps:

[0049] Step 1: Estimate the number of out-of-order packets and the required buffer size.

[0050] The estimated number of out-of-order packets in subflow i during the round trip time (RTT) of subflow j is:

[0051]

[0052] At this time, j>i; in order to estimate quickly, it is assumed that the number of data packets transmitted during the round-trip time (RTT) is a transmission unit. Under this assumption, L i,j Indicates RTT j The expected number of transmission units associated with out-of-order packets in subflow i during this period.

[0053] To avoid excessive transmission constraints, when RTT j The number of out-of-order packets during is less than RTT i When the number of pack...

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Abstract

The invention provides a multi-path transmission scheduling optimization method for a vehicle-mounted heterogeneous network. A technical scheme adopted by the invention for solving the technical problem is as follows: if a buffer blocking phenomenon is predicted, sub-streams with poor performance are found through throughput prediction and available bandwidth path selection algorithms, and the transmission through the sub-streams is stopped. The scheme of the invention has the beneficial effects that: by predicting the required buffer size in advance, the problem of receiving buffer blocking in multi-path transmission control protocol transmission can be effectively solved, and by improving the path selection in the multi-path transmission control protocol transmission, the throughput andnetwork utilization rate of a vehicle-mounted heterogeneous network system can be improved.

Description

technical field [0001] The invention relates to a method for predicting blockage of a receiving buffer, which belongs to the technical field of communications, and in particular to a multipath transmission scheduling optimization method for a vehicle-mounted heterogeneous network. Background technique [0002] With the development of new network access technologies, various network interfaces are provided on vehicles. Therefore, the traditional Internet of Vehicles is developing towards the trend of vehicle-mounted heterogeneous networks. The vehicle-mounted heterogeneous network is the application of a communication system formed by the fusion of various types of networks to the vehicle-mounted environment. The vehicle terminal has a variety of network interface modules, which can be connected to any network that constitutes the heterogeneous vehicle networking system. Multiple networks Collaboration and mutual assistance between them largely meet the communication needs i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/721H04L12/801H04L12/911H04L29/08H04L12/26H04L1/16
CPCH04L1/1607H04L43/0888H04L45/124H04L47/12H04L47/70H04L67/568
Inventor 赵海涛丁仪蔡舒祺朱奇星段佳秀朱洪波
Owner NANJING UNIV OF POSTS & TELECOMM
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