《5g網(wǎng)絡(luò)架構(gòu)設(shè)計(jì)》白皮書-5g network architecture design white paper

1、5G Network Architecture Design,,,,,,,,,,,,,,,,,,,,,,5G NETWORK: CHALLENGES AND OPPORTUNITIESP2,5G NETWORK ARCHITECTURE DESIGN,TYPICAL 5G NETWORK CAPABILITIES,STANDARDIZATION SUGGESTION,CONCLUSIONS,MAIN CONTRIBUTORS,IMT-

2、2020 (5G) Promotion Group was jointly established in February 2013 by three ministries of China (including MIIT, NDRC, and MOST) based on the original IMT-Advanced Promotion Group. The members include the main operators

3、, vendors, universities, and research institutes in China. The Promotion Group is the major platform to promote 5G technology research in China and to facilitate international communication and cooperation.,P5,P10,P19,P2

4、1,P22,,,,,,,,COTNTSINTRODUCTION,IM T-2020 (5G) Pr o mo tio n Gr o up 5G Network Architecture Design White Paper,P1,,1,,,,,,,,,,,,IM T-2020 (5G) Pr o mo tio n Gr o up 5G Network Architecture Design White Paper,

5、,,Along with the research on 5G getting further and more detailed, the industrials have shaped the basic consensuses on 5G scenarios. Facing to the application scenario of enhanced mobile Interne

6、t, 5G can provide access capability with higher experienced data-rate and wider bandwidth to support multimedia contents featured by higher definition and living experiences. Facing to the interconnection sc

7、enario of massive IoT devices, 5G can provide optimal control capability of higher connection density signaling to support the access management of IoT devices featured by massive, low cost and power consumption. Fac

8、ing to the vertical business scenarios such as critical communication or industrial Internet, 5G can provide information interaction capability with extreme low latency and high reliability to support service co

9、operation featured by high performance of real-time, accuracy and security among various interconnected entities. Due to the extreme 5G requirement on experience, efficiency and performance, as well as the vision of “e

10、verything connected”, 5G network now is facing new challenges and opportunities. Based on the core principles such as network service convergence and on demand service provision, 5G introduces richer radio access network

11、 architecture, providing smarter capabilities like radio control, service awareness,Introduction,and protocol stacks. 5G reconstructs the control and forwarding function in the core network, refreshing the existing

12、single pipeline and consolidated service model. 5G will provide highly customized network services for different user and vertical business on top of the new friendly and openness infrastructure. Above all, 5G will t

13、ransform the network into an integrated information service enabling platform which has the characteristics of fully resource sharing, easily function orchestration and tightly service interworking.Th

14、e international 5G standardization work has been launched completely. Therefore, it is very necessary to refine the design of 5G network architecture and focus on main technology direction to guide the follow-up

15、industrial development. In this white paper, we introduce a novel 5G network architecture design from the angel of logical function and platform deployment and expand the architecture design into four-d

16、imension diagrams, then extract the typical 5G service capabilities such as network slicing, mobile edge computing, on-demand mobile network reconstruction, user-centered RAN and network capacities exposure, and f

17、inally offer advices on the standardization work of 5G architecture and technology.,,,,,,,,,,,,,,,,,,,,,Firgure-1 5G E2E network challenges2,IM T-2020 (5G) Pr o mo tio n Gr o up 5G Network Architecture Design Wh

18、ite Paper,,1. Challenges from extreme high KPIFirstly, 5G system plans to provide 100M to 1Gbpsexperience data rate anytime and anywhere to satisfy the mobile internet consumer’s experience requirements for services su

19、ch as HDTV and argument reality. Even in a high-speed mobile environment up to 500km/h, the system shall offer basic service capability and necessary service continuity.Secondly, 5G system need to support at least tens

20、of Tbps/km2 traffic volume density and millions/km2 connection density at the same time for the efficient access requirements of devices in both mobile Internet and IoT scenarios. The traditional network system whic

21、h is marked by center-converging data forwarding,,5G Network: Challenges And Opportunities,pattern and single control mechanism may lead to traffic overhead and signaling congestion under 5G service background which is f

22、eatured by high throughput and massive connection.The last but not the least, 5G system must satisfy the end to end ms level latency requirement under the high reliability condition to support the high real time service

23、 such as automated driving and industry control. The latency and service interrupt time of today’s mobile system is up to about hundreds milliseconds, which is two order of magnitude higher than 5G latency budget. The ex

24、siting network also can not well support the reliability and sercurty requirement of specific services.,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

25、,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,3,,,,,,,,,,,,IM T-2020 (5G) Pr o mo tio n Gr o up 5G Network Architecture Design White Paper,,2. Oppo

26、rtunities by network and service convergenceConsidering the resources reservation for events thatmay suddenly or periodically happen, the mobility management for scenarios from high-speed rail to stable wireless sensor

27、s, and the latency demand of services from real time industrial control to remote meter reading with high time tolerance, all of these 5G services scenarios have put forward higher and more differentiated demands on netw

28、ork functions. To solving such a diverse sort of service scenarios, the novel 5G network concepts like network-service convergence and on-demand service provision will bring new opportunities to all the sectors of

29、 the information industry.Based on the position advantages of “l(fā)ast mile” of 5G network, the Internet applications provider can offer user experience with better discrimination. For example, mobile app can filter out m

30、ost appropriate service parameters according to the location area, movement tracks and radio contexts exposed by network to increase the satisfaction of gold customers. Meanwhile, ISP can offer particul

31、ar users with latency and bandwidth assurance by using of network edge caching and computing to gain an early advantage.,Based on the infrastructure advantages of “Full coverage and End-to-End” of 5G network, the I

32、oT service demand-side represented by vertical business can easily obtain the powerful and flexible service deployment environment. Vertical business can obtain the rich means to monitor and manage the termin

33、als and devices in the network and control the entire service running states relying on the powerful network management system. 5G infrastructure, which allows flexible function customization and resources confi

34、guration, can offer the 3rd party service demand-side with the ability to construct a service platform of their own. In this platform, user data can be safely isolated and HW/SW resource can be dynamically scale

35、d which may dramatically reduce the development threshold.From the angle of mobile network operators, 5G network may help them to further increase profits and reduce expenditures. In the perspective of prof

36、its increasing, 5G network break existing i so l a t e d a n d c o n so l i d a t e d se r v i c e p r o v i si o n framework, comprehensively open the network functions s uch as infras tructure resource

37、s , networking and control logic etc. to construct the,,4,,,,,,,,,,,,IM T-2020 (5G) Pr o mo tio n Gr o up 5G Network Architecture Design White Paper,,integrated information service enabling platform and br

38、ing new service growth points for mobile network operators. In the perspective of expenditures reducing, on-demand function and infrastructure resources provision mechanism will facilitate enhanced energy c

39、onservation and CapEx/OpEx per unit dataflow.,In particular, along with the deep convergence of mobile network and Internet, these two domains also mutually interact and infiltrate to each other posit

40、ively at technical aspect. The Internet technologies such as cloud computing, virtualization and softwarization would be the important enablers of 5G architecture design.,Firgure-2,5G integrated information service

41、enabling platform,,,5,,,,,,,,,,,,IM T-2020 (5G) Pr o mo tio n Gr o up 5G Network Architecture Design White Paper,,The design of 5G network architecture includes two parts: system design and networking design. The syst

42、em design mainly considers the network function and information interaction issues and aims to build a E2E unified logical architecture which has more reasonable function plane,partitions. The networking design focus on

43、the solution of hardware platform and networking deployment and attempts to fully realize the potential of the networking flexibility and security of the novel infrastructure environment based on SDN/NFV technologi

44、es.,,5G Network Architecture Design,1. 5G system design: logical diagram and function diagramAs shown in Figure-3, the logic diagram of 5Gnetwork consists of three function planes: access plane, control p

45、lane and forwarding plane.Access plane can accommodate more flexible radio access network topologies by exploiting multi-BS co- ordination, multi-connection mechanism and multi- RAT interworking technology.Control pl

46、ane can provide on-demand network,control functions such as radio resources management, mobility management and session management based on the centralized and restructurable control function modulars.Forwarding pl

47、ane has the ability to forward and process the service data in a distributed manner and provide more dynamic IP anchor configuration and richer service chain capability.,Firgure-3 Logical diagram of 5G network,,,

48、6,,,,,,,,,,,,IM T-2020 (5G) Pr o mo tio n Gr o up 5G Network Architecture Design White Paper,,Based on the overall logic architecture, 5G network function diagram uses the modular-based design principle and bui

49、ld the specific logic network via the composition of the network function modular to meet different scenarios. As shown in Firgure-4, 5G three-layers network function diagram takes control function layer

50、as the core, and the access and forwarding function layer as the basic resources and provides the orchestration and capabilities exposure layer’s functions as interface to the 3rd party. Open interfaces are used to supp

51、ort the flexible inter-layers’ function invocations. The main functions of each layer include the following:Management and Orchestration layer consists of three function modules name as user data, management

52、and orchestration and capabilities exposure. The user data function stores the user subscribtion profile, service policies and network context information. Management and orchestration function can create and

53、management network slicing on-demand based on the NFV platform. Capabilities exposure function handles the gathering and encapsulating jobs of the network capabilities and exposes them via APIs to the 3rd party.Network

54、 control layer includes all the control function of 5G network, for example, centralized radio resource scheduling, integrated multi-rat control, MM, SM and security management and flow control. Acc

55、ording to the instructions from the Management and orchestration layer, related control functions can be composed in this layer to implement,on-demand scheduling of the network resources in the lower layer.Network resou

56、rces layer can be divided into access side and network side. The RAN side functions are achieved by hierarchical functional entities, called central units (CUs) and distributed units (DU). While CU acts

57、 as the RAN anchor, DUs are remote access points for UEs, equipped with RF and part of baseband processing functions. Network side functions include the data forwarding, traffic optimization and content-orie

58、nted function. Based on the distributed IP anchor and flexible data forwarding paths, the user data flow can be introduced to appropriate nodes to implement the efficient forwarding and rich processing f

59、unctions such as DPI, content-based charging and flow compression etc.,,7,,,,,,,,,,,,IM T-2020 (5G) Pr o mo tio n Gr o up 5G Network Architecture Design White Paper,,Firgure-4 Function diagram of 5G network,,2. 5G

60、 networking design: platform diagram and networking diagram5G infrastructure platform will choose more andmore standardized data centers with universal hardware architecture. The platform should support high

61、 performance forwarding and carrier level management. 5G infrastructure platform will take network slice as the customized mobile network instance.By introducing SDN/NFV technologies (shown in Figur

62、e-5), 5G platform diagram could support dynamic resource allocation and high efficient scheduling. At the WAN level, the NFV orchestrator function could achieve function deployment and resource scheduling

63、 across data centers, and,SDN controller could realize the WAN level interconnection between data centers in different levels. In the MAN level and below, single data center is used to carry functi

64、ons for limited geo area which includes the unified NFVI infrastructure layer to realize the hardware and software decouple and the intra data center resource scheduling based on the SDN controller.The implementation

65、of NFV/SDN technology in the access network platform is an important research point of today’s industry. With the platform virtualization technology, multiple types of wireless technologies could be supported si

66、multaneously by,,8,,,,,,,,,,,,IM T-2020 (5G) Pr o mo tio n Gr o up 5G Network Architecture Design White Paper,,Firgure-5 Platform diagram of 5G network,one single platform, and the logical RAN entities and fu

67、nctions can be dynamically migrated in real- time, achieving higher level of resource scalability. By RAN virtualization, diverse RAN function entities can be dynamically seamless connected, in adaptation to

68、 differentiated edge RAN services requested by UE. In addition, to satisfy the special requirements of RAN virtualization, i.e. RAN accelerator for non-virtualized RAN functions and high speed information