High-throughput network coding transmission method for inter-satellite network broadcast communication
A technology of network broadcasting and network coding, which is applied in the field of satellite communication network, can solve the problems of low communication efficiency, limited wireless channel bandwidth, and communication speed not reaching the level of inter-satellite data broadcasting, etc., and achieve the goal of simple protocol, small changes, and improved network efficiency Effect
Inactive Publication Date: 2020-04-07
BEIHANG UNIV
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The advantage of this method is that it is simple to control, does not require complex communication protocols, and can realize the broadcast of satellite data on the entire network after a limited number of forwarding; The communication efficiency is low, and the communication rate is far from meeting the requirements of inter-satellite data broadcasting
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[0017] The present invention will be further described in conjunction with the accompanying drawings.
[0018] Such as figure 1 As shown, a high-throughput network coding transmission method for inter-satellite network broadcast communication of the present invention comprises the following steps:
[0019] Step 1: If it is not the sending time slot of the satellite, it is in the receiving state, and initializes a forwarding counter C locally for each frame of data, C∈{1,2,3,…}.
[0020] Step 2: When sending the time slot, for the received frame whose forwarding counter is not 0, use random linear network coding to generate a coded packet for all the data in frame unit, and forward it together with the data of the current frame.
[0021] Step 3: Decrement the corresponding counter by one for the frame that is forwarded in the sending time slot.
[0022] Step 4: Solve the received data of the same frame of linear equations to obtain a complete frame of data, wherein the decodi...
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The invention discloses an inter-satellite network broadcast communication high-throughput network coding and transmission method. The method comprises the steps of S1, if current time is not a sending time slot of a satellite, indicating that the satellite is in a receiving state and initializing a forwarding counter C for each frame of data locally, wherein the C is an element of a set {1, 2, 3,...}; S2, for the received frame of which forwarding counter is not 0 in the sending time slot, generating a coding packet based on all data by taking a frame as a unit through random linear network coding, and forwarding the coding packet and the current frame of data; S3, for the frame forwarded in the sending time slot, subtracting 1 by the corresponding counter; S4, carrying out linear equations calculation on the received same frame of data, thereby obtaining a complete frame of data; and S5 finishing the method. According to the method, the problem that according to a traditional flooding protocol, the network throughput is reduced due to the fact a great number of redundant data packets are sent is solved, the fact that the traditional flooding protocol is characterized in no feedback link and simple protocol is maintained, and direct upgrading can be carried out based on software of the traditional flooding protocol.
Description
technical field [0001] The invention relates to a high-throughput network coding transmission method for inter-satellite network broadcast communication, which relates to the field of satellite communication networks, in particular to an inter-satellite broadcast network for time division multiple access. Background technique [0002] With the improvement of satellite intelligence level, the inter-satellite link is added to the satellite to realize the transmission of data between satellites, and the antenna adopts a directional antenna, which can cover multiple satellites in the same constellation within its effective communication range. At present, under the condition of time-division multiple access, the broadcast communication of each satellite data in the constellation widely adopts the method of flooding, that is, all the data it receives is forwarded. The advantage of this method is that it is simple to control, does not require complex communication protocols, and c...
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IPC IPC(8): H04B7/185H04L1/00H04L12/721
CPCH04B7/18521H04L1/0076H04L45/32
Inventor 常青李显旭梁亚萍杨伟才王昊徐勇
Owner BEIHANG UNIV