NB-IoT技術(shù)業(yè)務(wù)流程

1、NB-IoT技術(shù)業(yè)務(wù)流程介紹1/13業(yè)務(wù)相關(guān)流程系統(tǒng)消息發(fā)送附著（ATTACH）TAUCP模式數(shù)據(jù)傳輸流程UP模式 Suspend/Resume流程2/13System Information系統(tǒng)信息分為MIB和一系列SIBLTE（R8）和NB-IoT系統(tǒng)信息主要內(nèi)容對(duì)比介紹3/13System Information發(fā)送MIB固定方式發(fā)送SIB1時(shí)域固定方式發(fā)送，頻域動(dòng)態(tài)調(diào)度（SI-RNTI加擾）SIB1中SchedulingInfoListsi-WindowLengthsystemInfoValueTagMIB固定方式發(fā)送SIB1半固定, 由MIB指示TBS和重復(fù)次數(shù)SIB1中Schedu

2、lingInfoListsi-WindowLengthsi-RadioFrameOffsetsystemInfoValueTagList4/13MIB&SIB1 發(fā)送RSIB1-NB =16LTE MIB發(fā)送LTE SIB1發(fā)送MIB-NB固定方式發(fā)送SIB1-NB半固定方式發(fā)送由重復(fù)次數(shù)，PCID決定幀號(hào)5/13System Information調(diào)度參數(shù)調(diào)度相關(guān)參數(shù)（NBIOT）si-WindowLength ms160, ms320, ms640, ms960, ms1280, ms1600, spare2, spare1si-RadioFrameOffset 0.15Schedulin

3、gInfoList-NB-r13 := SEQUENCE (SIZE (1.maxSI-Message-NB-r13) OF SchedulingInfo-NB-r13SchedulingInfo-NB-r13:=SEQUENCE si-Periodicity-r13 rf64, rf128, rf256, rf512, rf1024, rf2048, rf4096, spare,sib-MappingInfo-r13SIB-MappingInfo-NB-r13,schedulingInfoSI-r13SEQUENCE si-TBS-r13 b56, b120, b208, b256, b32

4、8, b440, b552, b680, si-RepetitionPattern-r13 every2ndRF, every4thRF, every8thRF, every16thRF SIB-MappingInfo-NB-r13 := SEQUENCE (SIZE (0.maxSIB-1-NB-r13) OF SIB-Type-NB-r13SIB-Type-NB-r13 := sibType3-NB-r13, sibType4-NB-r13, sibType5-NB-r13, sibType14-NB-r13, sibType16-NB-r13,spare3, spare2, spare16/13ATTACH流程建立PDN連接/不建立PDN連接網(wǎng)絡(luò)能力支持：控制面優(yōu)化/用戶面優(yōu)化網(wǎng)絡(luò)偏好（preferred network behaviour）:控制面優(yōu)化/用戶面優(yōu)化7/13TAU流程觸發(fā)條件除了傳統(tǒng)E-UTRAN，還包含： UE支持和偏好網(wǎng)絡(luò)行為信息發(fā)生改變TAU信息包含能力支持TAU信息包含網(wǎng)絡(luò)偏好8/13數(shù)據(jù)傳輸模式CP（Control Plane）模式無(wú)DRB數(shù)據(jù)經(jīng)過(guò)承載在SRB上NAS PDU傳輸U(kuò)P（User Plane）模式數(shù)據(jù)經(jīng)過(guò)DRB傳輸Suspend機(jī)制Resume機(jī)制9/13UP模式Suspend流程AS con