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Outline
In view of the growing demand for vehicle-ground integrated communication services and the limitation of frequency resources, this study investigates 5G network slicing technology for signal system business transmission under the vehicle-ground wireless communication architecture. First, the study analyzes the requirements of the current vehicle-ground integrated communication services and the status of the transmission system, and proposes the feasibility of using 5G network slicing technology to address these issues. Second, the system is designed from two aspects: network scheme and slicing scheme. Finally, taking the vehicle-ground business transmission of the signal system as an example, an experimental verification of the signal system business transmission at the 160 km/h speed was conducted on Guangzhou Metro Line 18. The results show that compared with the PRB reserved slice, the probability of the PRB reserved slice with a delay less than 150ms is 7.94% higher than that of the ordinary slice, reaching 99.87%, and the packet loss rate is 1.47% lower than that of the ordinary slice, reaching 0.08%; The percentage of PRB reservation+QoS slice delay less than 150ms has increased to 99.99%, while the packet loss rate has decreased to 0.5G network slice configuration PRB reservation and increasing QoS can meet the service transmission requirements of the signal system. The research results can provide reference for the transmission of signal system services in 5G networks at 160 km/h.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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