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# System prepended metadata

title: 6G Access and Edge Computing

---

6G Access and Edge Computing
===============================================================

> Chapter 12 of the book “Shaping Future of 6G network”


## Outline 

1. Intro of RAN?
2. RAN apply to 5G
	* Green network
	* Soft network
	* SDN
	* NFV
	* C-RAN
4. RAN apply to 6G
	* Intelligence
	* Openness
6. Conclusion


## Introduction

6G will based on **Information, Communication, and Data Technologies convergence** (ICDT convergence)

## True ICT Convergence: RAN to 5G

Background of 4G:
:	cell-planning, mobility handling, resource management, signaling and control, and coverage and signal processing are all carried out for and by each base station(BS) separately and uniformly

Key themes of 5G:
:	Efficiency and Agility

	How
	:	by taking towards "Green" and "Soft"
	
	Green technologies
	:	emphasize the importance of the efficient use of all the resources
	Key to **energy saving** and **environmental conservation**
	
	Soft technologies
	:	all element, from core to edge, should be **fast configurable**. Also, being **_software centric_**, move away from traditional **_hardware-centric_**
	
	Problem traditionally
	:	It's hard to achieve **efficiency** and **agility** jointly

		Why:
		: conventional CT approach maximize efficiency by building a special designed hardware with a tightly coupled software.
		
		Solutions:
		:	solved by the new concept, True ICP convergence.
		
Soft network:
: To achieve the **agility**, applying soft network is imperative.

	Concepts:
	:	1. Using C-RAN instead of RAN
		2. Decoupling H/Sw by using SDN(分為control/data 兩個plane)
		3. Implement Network function virtualization
		4. Built the network on telecom-grade cloud platform, achieving network **flexibility** and **scability** and providing users a variety of services
		> In soft network, computing, storage, and radio resources are virtualized and centralized to achieve dynamic user-centric resource management matching service feature
		
Green network:
:	To maximize efficiency in the utilization of any resources supporting wireless communications.

	Concepts:
	:	1. Maximize the use of renewable energy. 
		2. Advanced singal processing to effectively explore spatial resources
		3. Centralized coordination to reverse harmful interference to the useful signal
		4. Joint baseband and RF processing to enhance flexible duplexing to improve radio resource efficiency
		5. Enable network capacity migration, dynamically matching service variations without unnecessary consumption of network resources

C-RAN: centralized, cooperative, cloud and clean
: [[reference link](https://www.ufispace.com/tw/company/blog/what-is-cran-the-evolution-from-dran-to-cran)]

Network Function Virtualization(NFV):
: [[reference link](https://ithelp.ithome.com.tw/articles/10235446)]

Software-Defined Network:
: [[reference link](https://ithelp.ithome.com.tw/articles/10235434)]

:::success
Comparison of SDN & NFV
[[reference link](https://ithelp.ithome.com.tw/articles/10235724)]
:::


## Deep ICT Convergence: RAN to 6G

> Pursuit of higher flexibility, scalability, agility, manageability continue


**AI、人工智慧、深度學習**在這個時期取得了成功，引起來大家的注意

Challenges:

: large scale deployment, quick system upgrade

Solutions:
:	intelligence:
	:	Take advantages of deep learning, AI, and Artificial intelligence, which brings deliver efficient, dynamic resource and service optimization
	
		Advantages
		:	1. Optimize and Simplify network management and orchestation
			2. Improve service performance
			
		Potential application area:
		:	1. wireless big data(WBD)
			2. network data analydic(NWDA), improve QoS
		
		Challenges:
		: 1. RAN 收集資料 有privacy問題
		  2. difficult online training/prediction
		  3. high transmissioin/processing cost
:	Openness:
	: Opposite of tightly coupled system, in which network is disaggregated into modules that are sourced from different solution providers, adpoting different functions depending on the network situation
	
		Advantages:
		:	