有线宽带业务发展对运营商IP承载网络演进的影响

doi:10.11959/j.issn.1000-0801.2017090

Abstract

Abstract:

With the development of wired broadband services,new requirements on the carrying ability of network was put forward by video-dominated services.The demand on bandwidth and network quality of wired broadband traffic grooming was analyzed,and a feasible network evolution solution were presented from the perspective of multicast technology application,BRAS and CDN deployment,backbone network architecture evolution and other point of view.

Key words: wired broadband service, video service, network flattening, multicast technology, content closer to the user

CLC Number:

TN915.41

Lili TANG,Ming NIE,Ning ZHANG. Impact of wired broadband services development on operators' IP network evolution[J]. Telecommunications Science, 2017, 33(4): 198-204.

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业务模型	忙时平均带宽/（Mbit·s^-1）		不同码速播放占比	视频渗透率	并发率	宽带业务平均速率/（Mbit·s^-1）	宽带用户平均速率/（Mbit·s^-1）
上网业务	上网	2.2			70%	1.5	5.5
视频直播业务	4K	45	10%	80%	45%	3
	高清	6	35%
	标清	3	55%
视频点播业务	4K	45	13%	80%	10%	1
	高清	6	60%
	标清	3	27%
注：（1）并发率指用户同时使用业务的比率。考虑到宽带用户侧ONU（optical network unit，光网络单元）一般具备Wi-Fi功能，存在家庭成员多人同时使用互联网业务的情况，上网、直播、点播业务合计并发率超过100%。
（2）视频业务平均速率需求为各种清晰度码速×占比×视频渗透率×并发率。以直播业务为例，其平均速率为(45×10%+6×35%+3× 55%)×80%×45%=3 Mbit/s。根据IHS预测，截至2016年年底，中国4K电视渗透率接近10%，达到4 000万台，预计大量用户将通过有线宽带使用4K直播、4K点播业务，从而对运营商网络提出较高的网络带宽要求。

业务类型	时延	抖动	分组丢失率	错误率
视频直播	＜1 s	＜1 s	＜0.1%	＜0.01%
视频点播	＜3 s	＜1 s	＜0.1%	＜0.01%
音频电话	＜150 ms	＜50 ms	＜0.1%	＜0.01%
可视电话	＜150 ms	＜50 ms	＜0.1%	＜0.01%
视频会议	＜150 ms	＜50 ms	＜0.1%	＜0.01%
游戏	＜200 ms

对比项		距离/km
对比项	地市范围内	1 000	2 000	3 000
往返时延/ms	10	40	60	80
吞吐量/（Mbit·s^-1）	50.0	12.5	8.3	6.2

分组丢失率	吞吐量/（Mbit·s^-1）
0.01%	27.8
0.1%	8.8
1%	2.8
3%	1.6

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Impact of wired broadband services development on operators' IP network evolution

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