LTP-harq protocol design and transmission method and system

Abstract

The invention discloses an LTP-HARQ protocol design and transmission method and system. The LTP-HARQ protocol design and transmission method comprises the following steps: introducing the HARQ mechanism into the LTP protocol; establishing mathematical models of the transmission time expectation, throughput, and energy consumption related to the ARQ and HARQ transport mechanisms; providing an LTP protocol delay performance formula of the OSTBC-MIMO system under Rician fading; finally, discussing the factors affecting the performance of the LTP protocol and the maximum / minimum problems of the energy consumption on the signal to noise ratio and the information transmission rate. The LTP-HARQ protocol design and transmission method provides a reference for achieving high throughput, low delay and low energy consumption in the space information network link, and improves the transmission performance. According to the LTP-HARQ protocol design and transmission method, the data transmission under the condition of MIMO channel deterioration can be effectively protected combined with the retransmission mechanism of HARQ technology based on the OSTBC-MIMO system, therefore, the transmission efficiency of the LTP protocol is improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a LTP-HARQ protocol design and transmission method and system for distributed MIMO satellites under a space information network. Background technique [0002] Spatial information networks (spatial information networks, SIN) are space nodes distributed at different heights such as satellites, lift-off platforms, and ground terminals. , integrated integrated communication network. SIN can provide services for major applications such as ocean navigation, emergency rescue, navigation and positioning, air transportation, and aerospace measurement and control. Reliable transmission with large latency. [0003] With the development of high-throughput satellite technology, through the efficient networking and cooperation of distributed MIMO high-throughput satellites, it is necessary to realize the interconnection and intercommunication between SIN, ground mobile network and opt...

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Problems solved by technology

However, none of the above changes the ARQ feedback retransmission mechanism of the LTP protocol itself, and more is to analyze the related performance of the LTP protocol. Because the ARQ mechanism of the LTP protocol requires multiple retransmissions to ensure reliable transmission when the channel condition is poor, resulting in The link utilization rate deteriorates sharply and causes energy waste, which limits the effectiveness of LTP protocol transmission

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