Hilti C4/36-ACS 隨著數(shù)字媒體的興起，IPTV吸引了業(yè)界眾多眼球，成為全球電信業(yè)投資重點(diǎn)之一。IPTV業(yè)務(wù)是伴隨著寬帶互聯(lián)網(wǎng)的飛速發(fā)展而興起的一項(xiàng)新興的互聯(lián)網(wǎng)增值業(yè)務(wù)，它利用寬帶互聯(lián)網(wǎng)的基礎(chǔ)設(shè)施，以家用電視機(jī)和電腦作為主要終端，利用網(wǎng)絡(luò)機(jī)頂盒STB（Set-TopBox），通過(guò)互聯(lián)網(wǎng)協(xié)議來(lái)傳送電視信號(hào)，提供包括電視節(jié)目在內(nèi)的多種數(shù)字媒體服務(wù)。IPTV簡(jiǎn)單來(lái)說(shuō)就是交互式網(wǎng)絡(luò)電視，它能為用戶提供電信級(jí)的服務(wù)和使用簡(jiǎn)便的電視式體驗(yàn)。然而，在融合的環(huán)境中，使用IPTV這樣的應(yīng)用，服務(wù)質(zhì)量和性能測(cè)試顯得比以往更加重要。因此，IPTV測(cè)試儀應(yīng)運(yùn)而生。
IPTV測(cè)試儀網(wǎng)絡(luò)層質(zhì)量測(cè)試，主要指?jìng)鹘y(tǒng)IP網(wǎng)絡(luò)層的性能指標(biāo)，根據(jù)ITU-T Y.1540［3］建議，主要為IP丟包率、IP包時(shí)延、IP包抖動(dòng)及其相關(guān)參數(shù)。IPTV用戶最為注重的就是服務(wù)質(zhì)量，而網(wǎng)絡(luò)的時(shí)延、抖動(dòng)和丟包將導(dǎo)致圖像和馬賽克、圖片模糊和邊緣失真、音頻中斷以及通道更改延遲等，嚴(yán)重影響了服務(wù)質(zhì)量。因此，本文對(duì)網(wǎng)絡(luò)層指標(biāo)的測(cè)試設(shè)計(jì)與實(shí)現(xiàn)的研究具有重要意義。
1 測(cè)試儀的整體框架
IPTV測(cè)試儀由軟件和硬件兩部分組成，而對(duì)網(wǎng)絡(luò)層的測(cè)試，主要由硬件部分FPGA模塊的IP流量發(fā)生器實(shí)現(xiàn)，如圖1所示。
本文研究的IPTV測(cè)試儀網(wǎng)絡(luò)層測(cè)試，采用了單MAC主從機(jī)測(cè)試模式進(jìn)行主動(dòng)測(cè)試，利用IP流量發(fā)生器自發(fā)自收IP包，分析相應(yīng)的時(shí)間戳和包數(shù)量等參數(shù)，由此計(jì)算IP包的時(shí)延、抖動(dòng)和丟包率。
Hilti C4/36-ACS
PHILLIPS EPX NSFP EPX
PHILLIPS IC8032HCCN40 FNFP IC8032HCCN40
PHILLIPS ECG6354 NSFP ECG6354
PHILLIPS ECG98 NSFP ECG98
PHILLIPS RLY1046 NSFP RLY1046
PHILLIPS RLY1145 NSFP RLY1145
PHILLIPS RLY1145 NSPP RLY1145
PHILLIPS RLY2065 NSFP RLY2065
PHILLIPS RLY2065T NSFP RLY2065T
PHILLIPS RLY2163 NSFP RLY2163
PHILLIPS RLY2445 NSFP RLY2445
PHILLIPS RLY2743P NSFP RLY2743P
PHILLIPS RLY3943 NSFP RLY3943
PHILLIPS 4X070A USPP 4X070A
PHILLIPS 300/RSIF NSPP 300RSIF
PHILLIPS C200S66/ALTO USPP C200S66ALTO
PHILLIPS EHD-500Q/CL/TP NSFP EHD500QCLTP
PHILLIPS RLY2163 NSPP RLY2163
PHILLIPS 4X059A USPP 4X059A
PHILIPS SEMICONDUCTER IC80C31BH424P FNFP IC80C31BH424P
PHILLIPS 4X066A NSFP 4X066A
PHILLIPS RLY1025 USPP RLY1025
PHILLIPS 4X066A USPP 4X066A
PHILLIPS IC2661AC1N28 FNFP IC2661AC1N28
PHILLIPS 4X059A NSFP 4X059A
PHILLIPS 1A570A USPP 1A570A
PHILLIPS IA567A NSFP IA567A
PHILLIPS 13528 NSFP 13528
PHILLIPS 3534B1A0189A125B1 NSPP 3534B1A0189A125B
PHILLIPS 4X067A NSPP 4X067A
PHILLIPS 45PAR38/FL25-120V NSFP 45PAR38FL25120V
PHILLIPS 3535B4A0216A125A2 USPP 3535B4A0216A125A
PHILLIPS 3535B1A0130A125A1 USPP 3535B1A0130A125A
PHILLIPS 4X068A NSFP 4X068A
PHILLIPS 1A568A NSFP 1A568A
PHILLIPS 4X065A NSFP 4X065A
PHILLIPS 300T3Q/CL NSFP 300T3QCL
PHILLIPS ECG-5679 NSFP ECG5679
PHILLIPS RYBZ-120 NSPP RYBZ120
PHILLIPS 3534B2A0064A220A3 NSFP 3534B2A0064A220A
PHILLIPS 7726 USPP 7726
PHILLIPS IC2681AC1N40 FNFP IC2681AC1N40
PHILLIPS 4X653A NSFP 4X653A
PHILLIPS 3535B2B0021A330A3 USPP 3535B2B0021A330A
PHILLIPS 150Q/CL/DC NSFP 150QCLDC
PHILLIPS 3188GG362T400AHA2 USPP 3188GG362T400AHA
PHILLIPS ECG5592 USPP ECG5592
PHILLIPS VSS2906/00 NSPP VSS290600
PHILLIPS 3186GE152T450APA2 NSPP 3186GE152T450APA
PHILLIPS RLYB10240 USPP RLYB10240
PHILLIPS 3186GE152T450APA2 USPP 3186GE152T450APA
PHILLIPS VSS2901/00 NSFP VSS290100
PHILLIPS ECG-6162 NSFP ECG6162
PHILLIPS ECG-6163 NSFP ECG6163
Philips 114 SH TL/PLS/PLC Perbbbber Electronic Ballast
PHILLIPS PMA 611015XXX USPP 611015XXX
PHILLIPS PMA BSDA050T-NC-PP NSFP BSDA050TNCPP
PHILLIPS 4522-103-27126 USPP 452210327126
PHILLIPS 9404-407-42001 USPP 940440742001
PHILLIPS 9404-410-42001 USPP 940441042001
PHILLIPS 9404-420-11001 USPP 940442011001
PHILLIPS PMA EASMT6V22W20 NSPP EASMT6V22W20
PHILLIPS KS-90 USPP KS90
PHILLIPS PMA EASMT6V22W20-PV NSPP EASMT6V22W20PV
PHILLIPS PMA EASMT6V22W20-PV USPP EASMT6V22W20PV
PHILLIPS 9404-429-02021 USPP 940442902021
PHILLIPS 4522-104-96051 USPP 452210496051
PHILLIPS 600442-30SX NSPP 60044230SX
PHILLIPS 600442-30SX USPP 60044230SX
PHILLIPS PE-1411/15 USPP PE141115
PHILLIPS TLF846411D FNFP TLF846411D
Philips IM20 Control Board for PC20
Philips RA8348 43 Supply Interface Card CP22 Module 16K
PHILIPS HEALTHCARE 9430-021-80001 USPP 943002180001
PHILLIPS BUZ58A FNFP BUZ58A
PHILLIPS IMC-116 NSFP IMC116
PHILLIPS IMC-116 USPP IMC116
PHILLIPS IMG-116 NSFP IMG116
PHILLIPS IMG-116 USPP IMG116
PHILLIPS IO30/1 NSFP IO301
PHILLIPS PMA EASMT6V22E58-PV USPP EASMT6V22E58PV
Sanyo POA-LMP53 610-303-5826 Philips Lamp Bulb PLC-SE15
NEW bare Philips ( the brightest lamp) ready to install
Enlarge
Sanyo POA-LMP53 610-303-5826 Philips Lamp Bulb PLC-SL15
NEW bare Philips ( the brightest lamp) ready to install
Enlarge
Sanyo POA-LMP53 610-303-5826 Philips Lamp Bulb PLC-SU25
NEW bare Philips ( the brightest lamp) ready to install
Enlarge
Sanyo POA-LMP53 610-303-5826 Philips Lamp Bulb PLC-SU40
NEW bare Philips ( the brightest lamp) ready to install
Enlarge
Philips 114 SH TL/PLS/PLC Perbbbber Electronic Ballast
Philips EB-S 118 PLC / PLT Perbbbber Electronic Ballast
Philips EB-S 118 PLC / PLT Perbbbber Electronic Ballast
bbbbbbbb: Hong Kong
Philips 114 SH TL/PLS/PLC Perbbbber Electronic Ballast
bbbbbbbb: Hong Kong
Philips 114 SH TL/PLS/PLC Perbbbber Electronic Ballast
bbbbbbbb: Hong Kong
Philips EB-S 118 PLC / PLT Perbbbber Electronic Ballast
bbbbbbbb: Hong Kong
Hilti C4/36-ACS
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