NB-IoT增强技术研究现状和发展趋势

doi:10.11959/j.issn.1000-0801.2020039

Abstract

Abstract:

NB-IoT,which is the key technology of the Internet of things,has received widespread attention from global operators.Firstly,the commercial technologies of NB-IoT was outlined,then the research status of NB-IoT enhancement technology was introduced in detail from the aspects of mobile IoT enhancement technology,positioning enhancement technology,mobility enhancement technology and intelligent network optimization technology,and finally,future evolution of NB-IoT technology was introduced.

Key words: NB-IoT, enhancement technology, network evolution

CLC Number:

TP393

Furong XU,Weiwen WENG,Chao ZHANG,Tingting BIAN,Xinli MA,Xiangdong GAO,Xin LI,Lei CAO. Research status and development trend of NB-IoT enhancement technology[J]. Telecommunications Science, 2020, 36(2): 130-136.

I_TBS					I_RU
I_TBS	0	1	2	3	4	5	6	7
0	16	32	56	88	120	152	208	256
1	24	56	88	144	176	208	256	344
2	32	72	144	176	208	256	328	424
3	40	104	176	208	256	328	440	568
4	56	120	208	256	328	408	552	680
5	72	144	224	328	424	504	680	872
6	88	176	256	392	504	600	808	1 000
7	104	224	328	472	584	712	1 000	1 224
8	120	256	392	536	680	808	1 096	1 384
9	136	296	456	616	776	936	1 256	1 544
10	144	328	504	680	872	1 000	1 384	1 736
11	176	376	584	776	1 000	1 192	1 608	2 024
12	208	440	680	1 000	1 128	1 352	1 800	2 280
13	224	488	744	1 032	1 256	1 544	2 024	2 536

I_TBS					I_SF
I_TBS	0	1	2	3	4	5	6	7
0	16	32	56	88	120	152	208	256
1	24	56	88	144	176	208	256	344
2	32	72	144	176	208	256	328	424
3	40	104	176	208	256	328	440	568
4	56	120	208	256	328	408	552	680
5	72	144	224	328	424	504	680	872
6	88	176	256	392	504	600	808	1 032
7	104	224	328	472	584	680	968	1 224
8	120	256	392	536	680	808	1 096	1 352
9	136	296	456	616	776	936	1 256	1 544
10	144	328	504	680	872	1 032	1 384	1 736
11	176	376	584	776	1 000	1 192	1 608	2 024
12	208	440	680	904	1 128	1 352	1 800	2 280
13	224	488	744	1 032	1 256	1 544	2 024	2 536

工作模式	多频传输
3GPP R13、单HARQ进程、最大TBS为1 000 bit	60 kbit/s
3GPP R14、单HARQ进程、最大TBS为2 536 bit	105 kbit/s
3GPP R14、双HARQ进程、最大TBS为2 536 bit	158 kbit/s
3GPP R14、大TBS+2HARQ、与R13相比的增益	163%

工作模式/载波	独立模块/保护带模式		带内模式
工作模式/载波	锚点载波	非锚点载波	锚点载波	非锚点载波
3GPP R13，单HARQ进程，最大TBS为680 bit	25 kbit/s	27 kbit/s	22 kbit/s	24 kbit/s
3GPP R14，单HARQ进程，最大TBS为2 536 bit	72 kbit/s	79 kbit/s	49 kbit/s	54 kbit/s
3GPP R14，双HARQ进程，最大TBS为2 536 bit	105 kbit/s	126 kbit/s	71 kbit/s	86 kbit/s
3GPP R14，大TBS+2HARQ，与3GPP R13相比的增益	320%	367%	222%	258%

工作模式	TBS	传输时间	小区峰值吞吐量（不考虑开销）	上行开销	小区峰值吞吐量（考虑开销）	与3GPP R13相比的增益
ST 3.75 kHz	872 bit	160 ms	261.6 kbit/s	8%	240.6 kbit/s	0（240/240）
ST 15 kHz	872 bit	40 ms	261.6 kbit/s	8%	240.6 kbit/s	0（240/240）
MT 15 kHz	1 032 bit	4 ms	258 kbit/s	8%	237.3 kbit/s	3%（237/230）

Research status and development trend of NB-IoT enhancement technology

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