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反饋信道下基于LT碼的空間網(wǎng)絡(luò)廣播傳輸策略設(shè)計(jì)

索龍龍,  張更新,  邊東明,  呂晶,  謝智東

索龍龍, 張更新, 邊東明, 呂晶, 謝智東. 反饋信道下基于LT碼的空間網(wǎng)絡(luò)廣播傳輸策略設(shè)計(jì)[J]. 電子與信息學(xué)報(bào), 2018, 40(6): 1433-1437. doi: 10.11999/JEIT170820
引用本文: 索龍龍, 張更新, 邊東明, 呂晶, 謝智東. 反饋信道下基于LT碼的空間網(wǎng)絡(luò)廣播傳輸策略設(shè)計(jì)[J]. 電子與信息學(xué)報(bào), 2018, 40(6): 1433-1437. doi: 10.11999/JEIT170820
SUO Longlong, ZHANG Genxin, BIAN Dongmin, Lü Jing, XIE Zhidong. Design of Efficient Broadcast Transmission Strategy for Spatial Networks Based on LT Codes with Feedback Channel[J]. Journal of Electronics & Information Technology, 2018, 40(6): 1433-1437. doi: 10.11999/JEIT170820
Citation: SUO Longlong, ZHANG Genxin, BIAN Dongmin, Lü Jing, XIE Zhidong. Design of Efficient Broadcast Transmission Strategy for Spatial Networks Based on LT Codes with Feedback Channel[J]. Journal of Electronics & Information Technology, 2018, 40(6): 1433-1437. doi: 10.11999/JEIT170820

反饋信道下基于LT碼的空間網(wǎng)絡(luò)廣播傳輸策略設(shè)計(jì)

doi: 10.11999/JEIT170820
  • 1.

    (陸軍工程大學(xué)通信工程學(xué)院 南京 210007) ②(南京郵電大學(xué)通信與信息工程學(xué)院 南京 210003)

基金項(xiàng)目: 

國(guó)家自然科學(xué)基金(91738201, 61571464, 61601511)

Design of Efficient Broadcast Transmission Strategy for Spatial Networks Based on LT Codes with Feedback Channel

  • 1.

    (Institute of Communications Engineering, Army Engineering University, Nanjing 210007, China)

  • 2.

    (School of Telecommunication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003 China)

Funds: 

The National Natural Science Foundation of China (91738201, 61571464, 61601511)

  • 摘要: 由于其特有的廣域?qū)捀采w等特點(diǎn)，數(shù)據(jù)廣播業(yè)務(wù)一直是空間網(wǎng)絡(luò)的主要業(yè)務(wù)。然而空地間信道由于受到遠(yuǎn)距離、天氣變化及遮擋等因素影響，數(shù)據(jù)傳輸時(shí)延長(zhǎng)且丟包率較高。為進(jìn)一步提高數(shù)據(jù)廣播的性能，該文將反饋信息與LT碼相結(jié)合，提出一種新的空間網(wǎng)絡(luò)數(shù)據(jù)廣播傳輸策略。與傳統(tǒng)的數(shù)據(jù)廣播策略相比較，新的傳輸策略利用反饋信息估計(jì)信道丟包率，并在此基礎(chǔ)上引入信道狀態(tài)矩陣和數(shù)據(jù)包選擇權(quán)重向量，設(shè)計(jì)了數(shù)字噴泉新的編碼方法，進(jìn)而使得數(shù)據(jù)在重傳階段能夠根據(jù)信道狀態(tài)和重傳概率實(shí)時(shí)調(diào)整。仿真結(jié)果表明，新的數(shù)據(jù)廣播策略能夠?qū)崿F(xiàn)傳輸較少數(shù)據(jù)包的基礎(chǔ)上實(shí)現(xiàn)原始數(shù)據(jù)的可靠接收。
    Abstract: Since its wide coverage area, data broadcast is the major service of spatial system. However, due to the long distance and the complex, varied climate, data transmission suffers large round-trip-time and poor error performance. In order to achieve better performance, based on fountain codes and the feedback information, a novel and efficient data transmission strategy is proposed. Compared with typical protocols, the proposed strategy uses the feedback information to estimate the channel erasure probability. Besides, a weighted packet chosen vector is introduced into the fountain encoder to ensure the lost packets retransmitted in the order of the total consideration of their lost probability and the number of users which need a retransmission. Simulation results show that by the proposed scheme users can receive the data packets reliably while the total number of transmitted packets is less than the traditional protocols.
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出版歷程
  • 收稿日期:  2017-08-14
  • 修回日期:  2018-03-14
  • 刊出日期:  2018-06-19

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