IPTV流量带宽计算.docx
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IPTV流量带宽计算.docx
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IPTV流量带宽计算
流量带宽计算
1各节点带宽需求计算
单播带宽:
根据用户模型表,计算得出每个节点的单播带宽。
信令带宽:
根据各节点组网计算得到每个节点信令带宽。
直播带宽:
1)如果是全网组播,则每个节点只需要计算一份直播带宽,如50个H264频道,为2Mx50=100Mbps。
2)如果是组播中继,则:
中心节点带宽与下挂的区域中心(边缘节点)个数有关,为n+1的关系。
如:
某中心节点下挂3区域中心,则带宽需要计算3+1=4份。
区域中心带宽与下挂的边缘节点个数有关,为n+1的关系。
如:
某区域中心节点下挂12个边缘节点,则带宽需要计算12+1=13份。
每个边缘节点需要一份直播带宽,如50个H264频道,为2Mx50=100Mbps。
3)如果是全网单播,则:
中心节点和区域中心节点计算方法与组播中继相同。
边缘节点带宽需要根据用户访问模型计算本节点直播用户数获得。
如某边缘节点带用户10000个,H264频道50个,按照用户访问模型,有1850直播并发访问。
则需要的带宽为:
2Mx50+2Mx1850=3800Mbps,其中2Mx50为中继来的直播频道带宽。
汇总获得每个节点的接入带宽需求:
节点带宽=单播带宽+直播带宽+信令带宽
2带宽计算实例
在计算之前先通过查看FRS了解频道码率、用户数、频道数等参数。
①在线率和并发率和哪些部件有关系
在线率:
EPG容量
并发率:
HMS性能
②基础带宽计算
BitRate(kbps)
VideoBitRate
AudioBitRate
Format
LiveTV
VOD
AudioOnly
N/A
64
H.264
√
×
AdaptiveBitRate1(400*224)@214
150
64
H.264
√
√
AdaptiveBitRate2(400*224)@464
400
64
H.264
√
√
AdaptiveBitRate3(640*360)@664
600
64
H.264
√
√
AdaptiveBitRate4(640*360)@1328
1200
128
H.264
√
√
AdaptiveBitRate5(960*540)@1928
1800
128
H.264
√
√
HLSSDBitRate=(64+214+464+664+1328+1928)/0.8=5.828M
可以通过以上方式计算出标清或者高清的的带宽
2.1DimensionforIPTVServices
Commonassumptions
Item
Value
Format
Ratio
AverageBitrateofSDcontent(LiveTV)
3.5Mbps
H.264
90%
AverageBitrateofSDcontent(VOD)
2.5Mbps
H.264
AverageBitrateofHDcontent(LiveTV)
9Mbps
H.264
10%
AverageBitrateofHDcontent(VOD)
7Mbps
H.264
AveragebitrateofRadiochannels
384Kbps
H.264
N/A
AveragebitrateofPIPStream
300Kbps
H.264
N/A
SDconcurrentunicastRatio(并发率)
HDconcurrentunicastRatio
90%
10%
AverageBitrateofHDcontent(LiveTV)
Item
Inscope
Description
IPTVPlatformCapacityDimensions
Capability(支撑用户数目)
175000
PlatformHardwareCapabilityforTotalTerminals.
NetworkStructure
2Level
Distributedstructure
Centralnodeqty.
1
CentralNodeCapability
70000
PlatformCapabilityforCentralNodeTotalTerminals
Edgenodeqty.
3
NumberofEdgeSides
EdgeNodeCapability
35000
PlatformCapabilityforeachEdgeNodetotalterminals
UserModelDimensions(用户行为习惯的模型)
OnlineRatio
50%
RatioofOnlineTerminals=onlineTerminals/TotalTerminals.
RatioofVOD/TSTV/Catch-UpTV/nPVRconcurrentUnicastTerminals(单播)
2%
RatioofUnicastTerminals=Unicastterminals/TotalTerminals.
RatioofFCCconcurrentunicastTerminals
5%
RatioofFCCTerminals=FCCTerminals/LiveTVTerminals(OnlineRatio-UnicastRatio).
ContentDimensions(SD):
频道信息
SDLiveChannelQty.
235
SDLiveChannelQuantity
PIPchannelofSDLiveTVchannelQty
235
PictureInPictureChannelQuantity
SDCatch-UpTVChannelQty.
235
SDCatch-UpTVChannelQuantity
SDCatch-UpTVTotalHours(H)
2480
SDCatch-UpTVChannelRecordingHours,(15channelsfor3*24hours,rest1400hoursremainingchannelsinlast14daysforrestchannels),1400hourscanbeusedbyTStouploadCatchUpContentfrom3rdpartyorselectedrecordingforsomechannels.
SDTSTVChannelQty.
15
SDTSTVChannelQuantity
SDTSTVHours(H)
1
SDTSTVChannelRecordingHours
SDnPVRChannelQty
35
SDnPVRchannelQuantity
SDnPVRRecordingHour
10days*24Hours
SDnPVRchannelrecordinghours.
SDVODContentHours(H)
2000
SDVODContentHours
NVODChannelQty.(SD)
10
SDNVODChannelQuantity
MosaicChannelQty.(SD)
1
SystemSDMosaicChannelQuantity
RadioChannel
10
RadioChannelQuantity
ContentModelDimensions(HD)
HDLiveChannelQty.
30
HDLiveChannelQuantity
PIPchannelofHDLiveTVchannelQty
30
PictureInPictureChannelQuantity
HDCatch-UpTVChannelQty.
30
HDCatch-UpTVChannelQuantity
HDCatch-UpTVTotalHours(H)
640
HDCatch-UpTVChannelRecordingHours(5channelsfor3*24Hours,rest280hoursforrestremainingchannelsinlast14days),280hourscanbeusedbyTStouploadCatchUpContentfrom3rdpartyorselectedrecordingforsomechannels.
HDTSTVChannelQty.
5
HDTSTVChannelQuantity
HDTSTVHours(H)
1
HDTSTVChannelRecordingHours
HDVODContentHours(H)
1000
HDVODContentHours
HDnPVRChannelQuantity
5
HDnPVRchannelquantity
HDnPVRrecordingHours
10days*24Hours
HDnPVRchannelrecordinghours
NVODChannelquantity(HD)
0
NVODchannelquantity
NPVRCalculateModeforIPTV(Catch-UpTVRate)
10days*24Hours
SocialTV
UserFeedsPerDay
10
Averagefeeds(activities)perdayperuser
RefreshingPeriodofFeedsCount
60
User’saveragerefreshingtimeforfeedscount.Usercangettheunreadmessagenumberbeforerefreshing.Theshorterthisperiodis,thehighersystemperformancerequired.HuaweiassumetheRefreshingPeriodofFeedsCountis60secondsbydefault.
2.2DimensionforOTTServices
Commonassumption
Subs.RatioforTerminalTypes
OTTSTB
PC
iPAD
iPhone
AndroidPAD
AndroidPhone
Ratio
20%
20%
20%
15%
5%
20%
SDconcurrentunicstRatio
HDconcurrentunicastRatio
90%
10%
Format
SubscriberRatio
Rate(Kbps)
OTTSDHTTPStreamingdynamicrate
HLS
25%
250Kbps
HLS
25%
500Kbps
HLS
25%
700Kbps
HLS
25%
1Mbps
OTTHDHTTPStreamingdynamicrate
HLS
50%
2Mbps
HLS
50%
3Mbps
PIPStream
HLS
N/A
250Kbps(<300KbpsforOTTHD)
DimensionsforOTT
Item
Inscope
Description
OTTPlatformCapacityDimensions
Capability
60000
PlatformHardwareCapabilityforTotalTerminals.
NetworkStructure
2
LevelofDistributenetworkStructure.
Centralnodeqty.
1
CentralNodeCapability
24000
PlatformCapabilityforCentralNodeTotalTerminals
Edgenodesqty.
3
Edgenodequantity
EdgeNodeCapability
12000
PlatformCapabilityforEdgeNodeTotalTerminals
UserTrafiicModelDimensions
OnlineRatio
30%
RatioofOnlineTerminals=onlineTerminals/TotalTerminals.
ConcurrentRatio
10%
RatioofconcurrentTerminals=concurrentTerminals/TotalTerminals.
ContentModelDimensions(SD)
SDLiveChannelQty.
40
LiveChannelQuantity
SDCatch-UpTVChannelQty.
40
Catch-UpTVChannelQuantity
SDCatch-UpTVTotalHours
1140
Catch-UpTVChannelRecordingHours(10channelsfor3*24hours,rest420hoursforrestremainingchannelsinlast14days)420hourscanbeusedbyTStouploadCatchUpContentfrom3rdparty(asVOD)orselectedrecordingforsomechannels.
SDTSTVChannelQty.
10
TSTVChannelQuantity
SDTSTVHours
1
TSTVChannelRecordingHours
SDVODContentHours
1000
VODContentHours
ContentModelDimensions(SD)
nPVRChannelQuantity
25
nPVRchannelquantity.
nPVRchannelrecordinghours
10Days*24Hours
nPVRchannelrecordinghours
ContentModelDimensions(HD)
HDLiveChannelQty.
5
HDLiveChannelQuantity
HDCatch-UpTVChannelQty.
5
HDCatch-UpTVChannelQuantity
HDCatch-UpTVTotalHours(H)
444
HDCatch-UpTVChannelRecordingHours,(5channelsfor3*24Hours,rest84hoursforrestremainingshowsinlast14days)84hourscanbeusedbyTStouploadCatchUpContentfrom3rdparty(asVOD)orselectedrecordingforsomechannels.
HDTSTVChannelQty.
5
HDTSTVChannelQuantity
HDTSTVHours(H)
1
HDTSTVChannelRecordingHours
HDVODContentHours(H)
1000
HDVODContentHours
nPVRChannelQuantity
5
nPVRchannelquantity
nPVRChannelrecordingduration
10days*24Hours
nPVRchannelrecordingduration
SocialTV
UserFeedsPerDay
10
Averagefeeds(activities)perdayperuser
RefreshingPeriodofFeedsCount
60
User’saveragerefreshingtimeforfeedscount.Usercangettheunreadmessagenumberbeforerefreshing.Theshorterthisperiodis,thehighersystemperformancerequired.HuaweiassumetheRefreshingPeriodofFeedsCountis60secondsbydefault.
RefreshingPeriodofFeeds
120
User’saveragerefreshingtimeforfeeds.HuaweiassumetheRefreshingPeriodofFeedsis120secondsbydefault.
3IPTV业务带宽计算
●中心节点:
ServiceType
StreamType
RateBW
(Kbps)
CHN
QTY.
BW.Req
(Mbps)
Remark
StreamingType
ServiceName
IPTV
SDLiveTV
Multicast
3584
235
822.5
3.5Mbps*235SDchannels
HDLiveTV
Multicast
9216
30
270
9Mbps*30SDchannels
PIP
Multicast
300
265
77.6
300kbps*265livechannels
Mosiac
Multicast
3584
1
3.5
3.5Mbps*1Mosiacchannel
NVOD
Multicast
3584
10
35
3.5Mbps*10NVODchannels
SDVOD/TSTV/CATCHUP/nPVR
Unicast
2560
NA
3150
70000users*2%concurrentratio*90%SDratio*2.5Mbps*025+70000users*2%concurrentratio*90%SDratio*3.5Mbps*0.75
用户数*并发率*标清的使用率*标清带宽
HDVOD/TSTV/CATCHUP/nPVR
Unicast
7168
NA
980
70000users*2%concurrentratio*10%HDratio*7Mbps
FCC
Unicast
NA
NA
6804
70000*(50%-2%)*5%*(0.9*3.5Mbps+0.1*9Mbps)
others(signalling&STBUpgrade&Mgmtetc.)
Unicast
NA
NA
1000
Referencevalue
Uplink
(fromMSVSPlatformtoTSIGW)
IPTVBTVMulticastBW(Mbps)
1208.6
BW=(822.5+270+77.6+3.5+35)Mbps
IPTVVOD&FCCUnicastBW(Mbps)
10934
BW=(3150+980+6804)Mbps
IPTVsignaling&MGMTotherUnicastBW(Mbps)
400
100Mbps*3Edgesite,100Mbpsforsubscribers
IPTVSTBUpgradeUnicastBW(Mbps)
400
200MperoneUpgradeserver
TotalTraffic(Mbps)
12942.6
totalIPTVoutputthroughputtraffic
Downlink
(fromTSIGWtoMSVSPlatform)
IPTVBTVMulticastBW(Mbps)
1208.6
fromlegacyTSHeadendtoCentersite
EPG/VODMetedata&Mediauploading/otherUnicastBW(Mbps)
200
fromlegacyTSCMS/BMS/OSS/SP&CPetc.toCentersite,includingOTTVODtransaction
TotalTraffic(Mbps)
1408.6
totalIPTVinputthroughputtraffic
TotalIPTVTrafficBW(Mbps)
14351.2
totalIPTVthroughputtraffic
①假设VOD/TSTV/CATCHUP/nPVR所占用的带宽都是2.5M则
SDVOD/TSTV/CATCHUP/nPVR=70000users*2%concurrentratio*90%SDratio*2.5Mbps
如果VOD所占用的带宽都是2.5M,TSTV/CATCHUP/nPVR占用的带宽是3.5
计算结果=70000users*2%concurrentratio*90%SDratio*2.5Mbps*025+70000users*2%concurrentratio*90%SDratio*3.5Mbps*0.75
②FCC的计算
带宽=70000*(50
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- IPTV 流量 带宽 计算