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Radio forwarding communication system and method

A communication system and wireless technology, applied in radio transmission systems, transmission systems, multi-frequency code systems, etc., can solve the problems of sub-channel interference sensitivity, poor frequency diversity effect, affecting network scale and cost, etc., to improve defects, increase The effect of throughput

Active Publication Date: 2015-03-11
XFUSION DIGITAL TECH CO LTD
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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

Method used

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Embodiment Construction

[0036] Such as Figure 4 As shown, the present invention is based on the OFDM (or OFDMA) advanced relay system model of network coding technology. Among them, RS communicates with BS and MS / SS using FDD / OFDMA (or OFDM sub-channel) mode, BS downlink and RS uplink use frequency f1, BS uplink and RS downlink use frequency f2, and RS only needs a set of FDD wireless transceivers. The MS / SS performs wireless relay access to the BS through the RS, and the RS accesses the BS as an MS / SS. DL BS It is the downlink subframe of the physical layer frame of BS, from BS to SS / MS BS or RS, UL BS is the uplink subframe of the physical layer frame of the BS, by the SS / MS BS or RS to BS; DL RS It is the downlink subframe of the physical layer frame of RS, from BS to SS / MS RS or RS, UL RS It is the uplink subframe of the physical layer frame of the RS, which is determined by the SS / MS RS or RS to BS.

[0037] The base station and the subscriber station only need 2 time slots to exchange...

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Abstract

A wireless relay communication system includes base station(BS), relay station(RS) and user terminal; the RS provides the communication interfaces with the BS and the user terminal separately, and the RS includes a frequency division duplex(FDD) wireless transceiver and wireless link layer process unit based network decoding technology; the BS and user terminal include FDD wireless transceiver and a wireless link layer process unit based network decoding technology; the FDD wireless transceiver of RS, BS and user terminal include FDD wireless transmitter physical layer process unit and FDD wireless receiver physical process unit; the FDD wireless transmitter physical layer process unit and the FDD wireless receiver physical process unit of the RS correspond with the FDD wireless transmitter physical layer process unit and the FDD wireless receiver physical process unit of the user terminal. And additionally, in the invention, a relayed communication method based the system could increase relay throughput effectively.

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] lEEE802.16 is the first broadband wireless access standard, and 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, 802.16Multihop 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 enhancem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/204H04L27/26
CPCH04B7/15557
Inventor 郑若滨
Owner XFUSION DIGITAL TECH CO LTD
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