LLC order-arranging processing method based on multi-relay transmission condition
A processing method and technology of transmission conditions, applied in the field of LLC sorting processing, can solve problems such as inability to recover original data, and achieve the effect of ensuring integrity and recoverability, improving throughput, and ensuring complete transmission.
Active Publication Date: 2014-11-26
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
When the ground station gathers data, only the serial number of the AOS frame can only be sorted according to the serial number of the AOS frame, and the order of receiving data from each relay satellite cannot be known, which will cause the data to be unrecoverable when the ground station gathers output raw data
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Embodiment 1
[0071] 1. Take the space probe processing connection status with 3 relay satellites at the same time as an example, such as Figure 7 Shown:
[0072] Space Probe:
[0073] LLC encapsulation is performed on the upper layer data, and each LLC frame has its own LLC frame number;
[0074] According to the routing capability of each relay satellite, the space probe encapsulates the LLC frame into an encapsulation package through the ENCAP service, and finally encapsulates it into a Proximity-1 transmission frame and sends it to different relay satellites. When encapsulating the Proximity-1 transmission frame, it sends it to each The sequence number of the Proximity-1 transmission frame of the relay satellite starts counting from 0. Such as Figure 4 Shown: the LLC serial numbers of the data sent by the space probe to the relay satellite 1 are 0, 1, 2, 3..., and the serial numbers encapsulated into Proximity-1 transmission frames are 0, 1, 2, 3,..., and sent to China Following t...
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The invention relates to an LLC order-arranging processing method based on a multi-relay transmission condition. The steps are as follows: adding LLC capsulation on data between a network layer and a space data link layer and after the capsulation, adopting deep-space relay communication protocol stack configuration of an ENCAP service to package the ENCAP service of the space data link layer into a packet and then into Promixity-1 transmission frames at last and carrying out transmission to different relay satellites through the Promixity-1; the relay satellites carrying out de-capsulation on the received Promixity-1 transmission frames according to a Promixity-1 protocol and then carrying out de-capsulation according to the ENCAP service; taking out a data domain, wherein data of the data domain are LLC frames and then the relay satellites transmitting the data to one or more ground stations through an AOS protocol; and the ground stations sequentially carrying out AOS de-capsulation and ENCAP de-capsulation after receiving the data of the relay satellites and carrying out order arrangement according to frame serial numbers in the LLC frames through a reception window of an LLC layer after obtaining the LLC frames so that original data is restored. Order arrangement is carried out on data frames according to the serial numbers of the LLC capsulation so that integrity and restorability of transmitted data files can be ensured.
Description
technical field [0001] The invention relates to an LLC sorting processing method based on multi-relay transmission conditions. Background technique [0002] Acronyms and key term definitions [0003] AOS Advanced Orbiting Systems Advanced Orbiting Systems [0004] CCSDS Consultative Committee for Space Data Systems [0005] International Spatial Data Systems Advisory Committee [0006] [0007] Such as figure 1 As shown, CCSDS draws on the layered thought of the Open System Interconnection Reference Model, and proposes a series of space communication protocols located in different protocol layers. CCSDS protocol system model such as figure 1 shown. The CCSDS protocol architecture includes from bottom to top: physical layer, data link layer, network layer, transport layer and application layer. Among them, each layer includes several protocols. Link layer protocols mainly include telemetry (TM) space data link protocol, remote control (TC) space data link protocol,...
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IPC IPC(8): H04B7/14H04B7/155H04B7/185H04L1/00
Inventor 吴伟民赖静龚姗姗吴清林何绍富
Owner HUAZHONG UNIV OF SCI & TECH