5G特性在智慧矿山中的应用研究

Research on the application of 5G characteristics in intelligent mine

目前智慧矿山5G建设主要针对矿用5G的宏观技术发展方向、测试方法和特定应用场景展开研究,缺乏对智慧矿山5G各类应用场景特点的全面梳理。针对该问题,归纳了智慧矿山5G应用场景类型,梳理了主要应用场景的通信需求,指出传感器信息回传类应用具有广覆盖需求、视频信息采集和回传类应用具有上行大带宽传输需求、实时控制信息交互类应用具有下行低时延传输需求、自动驾驶信息采集和回传类应用具有上行大带宽和下行低时延共存的差异化传输需求。针对智慧矿山5G应用的环境特点和技术要求,提出了核心网+承载网+接入网的矿用5G网络总体架构:(1)核心网通过用户平面功能(UPF)和多接入边缘计算(MEC)下沉,实现矿山5G独立组网、独立运行。(2)承载网中的信息安全模块用于数据安全审计监测和传输控制,实现井上下数据安全隔离;网络切片和服务质量(QoS)管理模块用于对不同业务进行信道划分和隔离,实现多业务共存信道隔离,保障传输性能。(3)接入网采用基站控制器+基站汇集器+基站+终端的方式,实现5G信号分区、按需覆盖。根据上述架构,提出了面向智慧矿山多样化应用需求的5G关键技术方案:(1)采用网络切片技术将矿山5G网络划分为传感器切片、视频回传类切片、实时控制类切片、远程控制类切片,结合传输业务的QoS指标,将业务数据映射到不同的切片资源上进行传输,实现5G网络传输的按需分配。(2)通过灵活空中接口调度机制满足无线资源按需调度,即大带宽业务采用资源请求-业务缓存报告资源分配-业务缓存-数据传输资源分配的空口资源调度方式,保障上行传输带宽,低时延业务采用预留的专用空口资源进行传输,保证下行传输低时延。(3)当单一频段无法满足上行传输需求时,通过载波聚合技术将多个连续或非连续的载波聚合成更大的带宽,有效支撑矿山5G的大带宽传输需求。

At present, the 5G construction in intelligent mine mainly focuses on the macro technology development direction, test methods and specific application scenarios of mine 5G. There is a lack of comprehensive analysis of the characteristics of various 5G application scenarios of intelligent mine. In order to solve this problem, the types of 5G application scenarios of intelligent mines are summarized. The communication requirements of the main application scenarios are sorted out. It is pointed out that sensor information backhaul applications have wide coverage requirements. The video information collection and backhaul applications have uplink large bandwidth transmission requirements. The real-time control information interaction applications have downlink low-delay transmission requirements. The automatic driving information collection and backhaul applications need to meet the differentiated transmission requirements of uplink large bandwidth and downlink low delay. According to the environmental characteristics and technical requirements of 5G application in intelligent mines, the overall architecture of mine 5G network with core network + bearer network + access network is proposed.(1) The core network makes user plane function(UPF) and multi-access edge computing(MEC) sinking into the mine area to realize independent networking and independent operation of mine 5G.(2) The information security module in the smart transport network is used for data security audit monitoring and transmission control to achieve safe isolation of surface and underground data. The network slicing and quality of service(QoS) management module is used to divide and isolate channels for different services, as to realize channel isolation for the coexistence of multiple services and transmission performance guarantee.(3) The access network adopts the mode of base station controller + base station collector + base station + terminal to realize 5G signal partition and on-demand coverage. According to the above architecture, the key technical scheme of 5G for diversified application requirements of intelligent mine is proposed.(1) The network slicing technology is used to divide the mine 5G network into sensor slices, video return slices, real-time control slices and remote control slices. Combined with QoS indexes of transmission services, the service data is mapped to different slice resources for transmission,so as to realize the on-demand distribution of 5G network transmission.(2) The flexible air interface scheduling mechanism is used to meet the on-demand scheduling of wireless resources. The air interface resource scheduling mode of "resource request-service buffer report resource allocation-service bufferdata transmission resource allocation" is adopted for large-bandwidth services. The mode is used to ensure the uplink transmission bandwidth. The reserved dedicated air interface resources are adopted for low-delay services to ensure the low delay of downlink transmission.(3) When a single frequency band cannot meet the uplink transmission requirement, multiple continuous or discontinuous carriers are aggregated into a larger bandwidth through carrier aggregation technology, effectively supporting the large bandwidth transmission requirement of mine 5G.