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The multi-hop routing composed of wireless nodes in wireless multi-hop network can cause serious data loss, which affects the transmission performance of multi-hop network. To reveal the influence of data loss on the transmission performance of wireless multi-hop networks, this study proposed a transmission control method based on multiparameter judgment of network status. A judgment model of wireless multi-hop network condition was established according to the feedback information of several parameters. The congestion status of wireless multi-hop network and the random errors in data transmission were analyzed on the basis of three parameters, namely, inter-packet delay difference, short-term throughput, and packet out-of-order delivery ratio. After evaluating the wireless multi-hop network status, the growth factor of the congestion window was introduced combined with the number of hops in the link and the weighted packet loss rate, and the window growth rate was analyzed. Moreover, the accuracy of the scheme was verified by experiments. Results demonstrate that the growth rate of the congestion window can improve the transmission rate of wireless multi-hop networks. Compared with the traditional Transmission Control Protocol (TCP) scheme, the proposed scheme improves the throughput by nearly 35% in the chain topology scenario of wireless multi-hop networks. The study provides reference for evaluating the performance of data transmission in wireless multi-hop networks. [ABSTRACT FROM AUTHOR]

Satellite networks have the characteristics of long transmission delay, high bit error rate (BER), and asymmetric wide band, which seriously influence the performance of traditional TCP/IP networks. In order to adapt to long delay and high BER of satellite networks, a transmission control algorithm was proposed in this study. The amount of data transmission was enhanced to fill the high bandwidth-delay product of satellite links. The transmission factor was used to estimate available bandwidth in slow start. The reason for data loss was evaluated by the data backlog value in congestion avoidance. In this way, the threshold was increased in fast recovery, and the data transmission was improved in a short time. Moreover, the value of the congestion window in slow start and congestion avoidance was analyzed. And the threshold was adjusted by different network conditions. Results demonstrate that the proposed algorithm effectively improves the throughput of satellite links by 57.14% compared with TCP New Reno and also distinguishes different data losses. These findings indicate the transmission mechanism can take lower download response time. The proposed algorithm provides a good prospect to improve the transmission performance of satellite networks. [ABSTRACT FROM AUTHOR]

The satellite network has the advantages of wide coverage, convenient access, and the influence of the natural environment. Wireless multi-hop network is suitable for the occasion that cannot be easily or inconvenient to lay network facilities and the occasion of the need for rapid automatic networking. Multi-hop network and the satellite network may combine a heterogeneous network that can provide an effective and convenient way to access the network in the ocean or in remote areas. This paper, firstly, builds a heterogeneous network with satellite network and multi-hop network, and discusses the bandwidth delay product (BDP) of heterogeneous network, then proposes a new end-to-end congestion control algorithm. The proposed scheme at the outset increases the dynamic time interval for the initial transmission data that can reduce the backlog of burst data at the access point, and then increases the amount of data transmission in the slow start that can improve high bandwidth delay product of satellite network. In the congestion avoidance, it adjusts the congestion window size by monitoring the random packet loss and congestion packet loss. This algorithm can effectively solve the long delay in heterogeneous networks, and improve the accuracy of the high packet loss rate monitoring in multi hop networks and satellite networks. The proposed algorithm can effectively solve the influence of the long delay in the heterogeneous network, at the same time it can distinguish the different packet loss. [ABSTRACT FROM AUTHOR]