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1、Title: Type: 微软雅黑 Size：32-24-pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：20pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B245NB-IoT技术交流 -RAN2/3流程简介Title: Type: 微软雅黑 Size：24-pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：20pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B245nRA
2、N2/3相关流程 随机接入流程 上行功控 随机接入功控 NPUSCH功控 上下行HARQ TA更新流程 Suspend/Resume流程 DRX和eDRX 系统消息发送和更新流程 PSM ZTE All rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：18pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B2453内部公开 随机接入流程(Legacy LTE对比分析)随机接入触发场景 NB-IoTLe
3、gacy LTE(R8) CP solution UP solution 在RRC_IDLE状态下初始接入Y Y Y RRC重建N Y Y 上行数据到达（上行失步或 者调度请求）Y Y Y 下行数据到达（上行失步）Y Y Y 切换NN Y 定位NN Y NB-IoTLegacy LTE(R8)基于竞争 （Contention based）基于竞争 基于非竞争 Non-Contention based随机接入类型 ZTE All rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color：The ZTE blue Subtitle: Type：微软雅黑
4、 Size：18pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B2454内部公开 随机接入Preamble资源(Legacy LTE对比分析)LTE/NB-IoT从系统消息SIB2中，确定PRACH信道配置和资源 NB-IoT RSRP-ThresholdsPrachInfoList确定CEL等级，选择对应 CEL的PRACH资源 CE等级从0递增，numRepetitionsPerPreambleAttempt 递增 maxNumPreambleAttemptCE ZTE All rights reservedTitle:
5、Type: 微软雅黑 Size：24-32pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：18pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B2455内部公开 随机接入Preamble资源(Legacy LTE对比分析)NB-IoT时频域资源LTE时频域和Preamble资源 ZTE All rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：18pt C
6、olor: The ZTE greenG143, B212R140,G198, B62R90,G203, B2456内部公开 随机接入响应窗口(Legacy LTE对比分析)NB-IoT 随机接入响应窗口单位是PDCCH周期 窗口起始位置和长度未定，上图只作为示例说明 ZTE All rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：18pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B2457内部公
7、开 随机接入响应LTE-RA-RNTI= 1 + t_id + 10*f_id NB-IoT的RA-RNTI计算方法待确定 ZTE All rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：18pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B2458内部公开 MAC PDU（Random Access Response）MAC PDU（RAR）-NB-IoT和LTE结构定义一样 NB-IoT BI机
8、制待确定 RAPID部分包含NPRACH频域Tone信息，待确定 ZTE All rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：18pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B2459内部公开 Random Access ResponseRAR格式-NB-IoT和LTE一样 ZTE All rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color
9、：The ZTE blue Subtitle: Type：微软雅黑 Size：18pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B24510内部公开 UL Grant in RAR字段取值范围UL Subcarrier Spacing0-3.75k， 115kSubcarrier indication6bits（和DCI N0中的UL Grant一致）MCS/TBS3bits（特殊的MCS和TBS表）Scheduling delay 2bits（和DCI N0中的Delay一致）MSG3 Repetition Number3b
10、its（和DCI N0中的Repetition一致）Total number of bits15bits（+5 bits padding） ZTE All rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：18pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B24511内部公开 发送MSG3消息UE使用MSG2中分配的UL Grant资源UE发送MSG3UE启动冲突检测定时器mac-Contentio
11、nResolutionTimer ZTE All rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：18pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B24512内部公开 DV和PHRIndexData Volume (DV) value bytesInde xData Volume (DV) value bytes 0DV = 0867 603MAC CE格式DV定义PH定义未最终确定 ZTE A
12、ll rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：18pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B24513内部公开 MSG4和MSG5 ZTE All rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：18pt Color: The ZTE greenG143
13、, B212R140,G198, B62R90,G203, B24514内部公开 PDCCH OrderDCI format N1: - Flag for format N0/format N1 - NPDCCH order indicator 1 bit - NPDCCH Order标志置为1时，使用C-RNTI加扰 - Starting number of NPRACH repetitions 2 bits（覆盖等级） - 其它所有bit都置为1 ZTE All rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color：The ZTE blue
14、 Subtitle: Type：微软雅黑 Size：18pt Color: The ZTE greenG143, B212R140,G198, B62R90,G203, B24515内部公开 随机接入功控MSG1 preamble发送功率的确定CEL 等级数量1 , 最低CEL采用power ramping方案发送其它CEL用最大功率发送CEL 等级数量=1, power ramping发送。preambleInitialReceivedTargetPower -90dBm - -120dBmpowerRampingStep 0dB，2dB, 4dB, 6dBPathLoss = RS 功率
15、RSRPUE侧计算Preamble 发射功率LTE: PREAMBLE_RECEIVED_TARGET_POWER = preambleInitialReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_TRANSMISSION_COUNTER 1) * powerRampingStep ZTE All rights reservedTitle: Type: 微软雅黑 Size：24-32pt Color：The ZTE blue Subtitle: Type：微软雅黑 Size：18pt Color: The ZTE greenG143, B212
16、R140,G198, B62R90,G203, B24516内部公开 随机接入功控NB-IoT：PREAMBLE_RECEIVED_TARGET_POWER要考虑重复次数的因素PREAMBLE_RECEIVED_TARGET_POWER is set to:PREAMBLE_RECEIVED_TARGET_POWER - 10 * log10(numRepetitionPerPreambleAttempt)物理层发送Preamble功率 = min（Pmax， PREAMBLE_RECEIVED_TARGET_POWER + Pathloss)示例：RS功率20dBm，RSRP = -70 dBm，PL=90dB小区配置三个覆盖等级，normal，extend，extreme在normal等级下， preambleInitialReceivedTargetPower= -110 dBmRepetition =
