Wireless relay hybrid cooperative transmission method and system based on layered modulation technology

Abstract

The invention discloses a wireless repeating type hybrid and cooperative transmission method and system based on the hierarchical modulation technology and relates to the technical field of wireless communication. The wireless repeating type hybrid and cooperative transmission method based on the hierarchical modulation technology comprises the steps that a group of repeater devices receive a first signal sent by a first base station and a second signal sent by a second base station on the same frequency band at the same time; the L repeater devices in the group of repeater devices send the first signal to an aggregation base station in a decoding type forwarding mode, and N to L repeater devices send a superposed signal of the first signal and the second signal to the aggregation base station in an amplifying type forwarding mode; the aggregation base station receives the signal transmitted by the group of repeater devices and conducts serial interference elimination and combined decoding on the received signals. According to the wireless repeating type hybrid and cooperative transmission method based on the hierarchical modulation technology, the two cooperative forwarding schemes including the decoding type forwarding and the amplifying type forwarding are combined based on the hierarchical modulation technology, in this way, signals which are useless and are not decoded successfully according to a traditional decoding type forwarding scheme can also assist in data transmission through amplifying type forwarding, and therefore the data throughout between the base station and the aggregation base station is increased to the maximum extent.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and system for wireless relay hybrid cooperative transmission based on layered modulation technology. Background technique [0002] With the popularity of smart phones and the rapid development of mobile multimedia technology, base stations such as macrocell base stations, smallcell base stations (pico base stations, femto base stations) and WiFi APs may receive massive data information from multiple users, and in many cases There is no wired optical fiber interconnection between the data source base station and the core network, but data transmission through wireless devices. For example, in temporary hot spots such as stadiums and theaters, small cell base stations receive massive data from users. , it is necessary to transmit massive user data to the aggregation base station through the wireless backhaul link, so as to further transmit the user ...

AI Technical Summary

Problems solved by technology

Existing multi-relay cooperative forwarding schemes either use decoding and forwarding, or all use amplification and forwarding, or adaptive time-sharing adopts one of the two common cooperative forwarding schemes, and it is rare to see different parts of cooperative relaying Using decoding and forwarding and amplification and forwarding at the same time, and not using layered modulation technology to combine these two cooperative forwarding schemes to maximize the channel capacity of the transmission link

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