Radio forwarding communication system and method

Abstract

An interim wireless communications system, including base stations BS, transit stations and user terminals RS; the RS and BS respectively, provide user terminals and communication interface, the RS includes a frequency division duplex FDD wireless transceiver and network-based coding technology wireless link layer processing unit; BS and end users FDD - included in both wireless transceiver and decoding technology based on the wireless network link layer processing unit; RS, BS and user terminals FDD wireless transceiver contains the wireless transmitter FDD physical layer processing units and wireless receiver FDD physical layer processing unit; the transmitter RS FDD physical layer department rationale receiver modules and FDD physical layer processing unit with BS and user terminals in receiver FDD physical layer processing units and wireless transmitter FDD physical layer processing unit counterparts. In addition, the inventionincludes a transit system based on the communication method whichcanincrease the throughput of transit.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a network coding-based Orthogonal Frequency Division Multiple Access (OFDMA) wireless relay communication system and method. Background technique [0002] IEEE 802.16 is the first broadband wireless access standard. There are two main versions: the broadband fixed wireless access version of the 802.16 standard, "802.16-2004" and the broadband mobile wireless access version of the 802.16 standard, "802.16e". 802.16-2004 defines only two types of network elements, BS and SS; 802.16e also defines only two types of network elements, BS and MSS. At present, 802.16 Multihop Relay SG (802.16 Multihop Relay Research Group) only proposes the concept of WiMAX relay station (RS). One of its important functions is as a relay between BS and SS / MSS, expanding the coverage of BS or adding subscriber stations. throughput. In order to support RS, what modifications and enhancemen...

AI Technical Summary

Problems solved by technology

[0008] The first is to divide the carrier into continuous groups, which is the simplest to implement, and the adjacent sub-channel interference is small, but the effect of frequency diversity obtained is poor

[0009] The second is that carriers of different sub-channels are interleaved in a regular manner. This frequency diversity effect is better, but the system is more sensitive to inter-sub-channel interference.

[0017] In the existing technology, each transfer data has to be sent twice, so the throughput of the transfer system is low, and the network capacity is limited, which affects the scale and cost of the network

[0018] In addition, in the FDD mode, there is mutual interference between the base station, the relay station and the user station in the network system communication

Images