A Hybrid Switch Fabric for Onboard Processing Transponders

Abstract

A hybrid switching structure suitable for on-board processing transponders, including an ingress port processing unit, a shared buffer, a space division switching unit, a switching control unit, and a frame shaper; the ingress port processing unit adapts the time slot frame, Classification processing, output two channels after processing, one channel of continuous time slot frames is sent to the space division switching unit, one channel of packet data stream is sent to the shared buffer; the shared buffer is used for buffer space allocation and mapping management, and outputs corresponding packets according to scheduling instructions to the frame shaper of the specified port; the space division switching unit sends the time slots of the incoming port to the frame shaper in real time according to the control information; the frame shaper puts the time slots into the designated time slot buffer and shares The packets output by the buffer are encapsulated into idle service time slots according to the priority, and at the same time, the data serial output of the specified time slot buffer area is read according to the frame start sending instruction. The invention can support circuit switching services and packet switching services of various rates, and supports any proportion of the two types of services.

Description

technical field [0001] The invention relates to a hybrid switching structure suitable for on-board processing transponders, belonging to the field of satellite communication on-board switching. Background technique [0002] In the multi-spot beam satellite communication system, the space-borne switching technology enables all business switching functions to be completed on the star, thereby improving the real-time performance of business transmission and effectively utilizing frequency resources. The existing space-borne switching technology can be divided into two types: space-borne circuit switching and space-borne packet switching. [0003] On-board circuit switching requires both communicating parties to establish a physical channel that is exclusively occupied by both parties before communication. This physical channel can be a time slot (on-board switching-time division multiple access SS / TDMA), or a sub-frequency band (on-board switching-frequency division multiple a...

AI Technical Summary

Problems solved by technology

[0011] Some satellites adopt a hybrid structure of "bent pipe transparent switching of microwave switch matrix + packet switching of baseband processing". Two different types of loads are used to support different types of services, which are divided into two physical layer systems: on-board transparent forwarding loads and On-board processing switching load (including baseband processing), but this hybrid structure results in poor flexibility of the entire on-board processing process

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