Telecommunications Science ›› 2022, Vol. 38 ›› Issue (7): 157-165.doi: 10.11959/j.issn.1000-0801.2022170
• Engineering and Application • Previous Articles Next Articles
Wenfa YAN, Feng CHEN
Revised:
2022-05-05
Online:
2022-07-20
Published:
2022-07-01
CLC Number:
Wenfa YAN, Feng CHEN. Gigabit broadband all-optical indoor far-end coverage[J]. Telecommunications Science, 2022, 38(7): 157-165.
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传输介质 | 协议 | 稳定性 | 优势 | 劣势 | 未来演进趋势 |
光纤 | PON/以太 | 高 | 高稳定性、高可靠性、传输带宽基本无限制(带宽上限主要取决于设备能力) | 《综合布线系统工程设计规范》(GB50311-2016)未定义光纤部署,室内部署率低,终端成本较高 | 光纤支持10 Gbit/s、100 Gbit/s演进能力,介质无须更换 |
网线 | 以太 | 较高 | 实现成本低,较为普及,室内装修普遍预埋 | 信号衰减量与长度成正比,网速越高衰减越严重,超过1 Gbit/s的高规格网线线径粗,部署难度大 | 支持更高速率的网线成本高 |
Wi-Fi | 802.11系列 | 较差 | 无须布线,部署灵活方便、成本低 | 无线衰减明显,易受环境干扰影响,稳定性较差 | 三频路由器,设置专用频段实现Wi-Fi回传 |
电力线 | G.hn/Homeplug | 差 | 复用电力线,较易部署和维护 | 存在电器干扰,无法有效跨空等问题,多设备组网时性能劣化严重 | 协议迭代速率慢,当前最高物理层速率 2 Gbit/s,传输速率1 Gbit/s |
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类接入网组网 | 光以太网组网 | |
组网设备及介质 | 光网关设备、远端延伸设备、光分路器、光纤 | 光网关设备、远端延伸设备、光纤 |
网关增加模块 | 1个光电转换模块,1个类OLT光处理模块(未来集成到SoC中) | 若干光电转换模块,超过 4 个以上远端延伸设备建议配置LAN交换机及相应光电转换模块 |
成本 | 较高,有待规模应用降低成本 | 不增加光交换机时成本较低,增加光交换机时成本高 |
网关WAN侧光口速率 | 上行2.5 Gbit/s(XG-PON),下行10 Gbit/s | 上行2.5 Gbit/s(XG-PON),下行10 Gbit/s |
网关LAN侧接口速率 | 上行1.25 Gbit/s,下行2.5 Gbit/s,多口共享 | 单口上下行均1 Gbit/s,多个接口可并发 |
组网能力演进 | GPON→10 Gbit/s PON | 1 Gbit/s光以太网→10 Gbit/s光以太网 |
技术规范及产品标准 | 可参考光接入网规范 | 可参考光以太网规范 |
产业成熟度 | 少量试点,尚未实现SoC设计 | 产品较少,有成熟光电模块 |
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