基于TOA指纹数据库的小小区发现

doi:10.11959/j.issn.1000-0801.2017221

Abstract

Abstract:

In the scenario that a large number of small cells are deployed in the mobile communication network,the number of carriers to be detected by the user equipment (UE) in inter-frequency scanning is considerably larger than that in the conventional network deployment scenarios.This procedure may consume tremendous amounts of UEs’ energy.In order to solve this problem,a small cell discovery (SCD) scheme based on TOA fingerprint database to alleviate intensive energy consumption was proposed when the UEs try to find their potential serving small cells.The proposed scheme reduces the energy consumption of the UE by decreasing the number of unnecessary inter-frequency detection.The simulation results verifiy that the proposed scheme,compared with the existing SCD strategy using received signal strength (RSSI) based radio maps,has better anti-noise performance and higher accuracy.In addition,it can effectively help the high-speed UE avoid performing inter-frequency detection,and hence increase the rate of the UE being successfully connected to the appropriate small cell.

Key words: small cell discovery, TOA, fingerprint database, inter-frequency detection, energy efficiency

CLC Number:

TN929.5

Yang CHEN,Zhenzhu LEI,Bin SHEN. Small cell discovery based on TOA fingerprint database[J]. Telecommunications Science, 2017, 33(9): 163-173.

Figures/Tables 13

References 19

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指纹1	指纹2	…	指纹M
macroID_11	macroID_21	…	macroID_M1
TOA_11	TOA_21	…	TOA_M1
macroID_12	macroID_22	…	macroID_M2
TOA_12	TOA_22	…	TOA_M2
…	…	…	…
macroID_1N	macroID_2N	…	macroID_MN
TOA_1N	TOA_2N	…	TOA_MN

参数	宏小区	小小区
发送功率/dBm	46	30
站点间最小距离/m	3 000	150
IFS周期（T_inter）/ms	80、1 000
同频扫描周期/ms	200
触发时间/ms	480
切换时延/ms	160
UE速度/(km·h^-1)	5～80
指纹长度	3
指纹匹配周期/s	1
系统带宽/MHz	20
快衰落模型	ITU Vehicular A(6 tap)

Small cell discovery based on TOA fingerprint database

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