Paper Request Document Week 01 : Preliminary Knowledge (4G, 5G, OpenRAN) 2021/01/30 : Fundamentals: Observing 4G/LTE. 2021/02/01 : Fundamentals: Observing how 5G differs from 4G. 2021/02/03 : Fundamentals: Observing OpenRan apporach to 5G. 2021/02/04 : Fundamentals: RAN Intelligent Controller Week 02 : Tasks

:::info Goal: The goal of this task is to understand the source code of RIC Routing Managers and to further Understand the Messaging Flow among managers in RIC. [x] Understanding the Messaging Flow of E2 Manager, Appmanager, and Routing Manager [X] Understanding the Work Division among RIC rtmgr's Components Resources: rtmgr - GitHub Wormhole Switching :::

:::info Goal: Learning RMR from inside and outside to further understand how messaging in RIC Works and to help ease the research of RIC managers communication. ::: Overview RMR (RIC Message Router) is a library used in RIC that provides the ability to send and receive message easily to RIC components. RMR manages all endpoint information, connections, and routing information to establish and maintain communication. From the application’s point of view, all that is required to send a message is to allocate (via RMR) a message buffer, add the payload data, and set the message type. To receive a message, the application needs only to invoke the receive function; when a message arrives a message buffer will be returned as the function result. Applications are required to place a message type into a message before sending, and may optionally add a subscription ID when appropriate. The combination of message type, and subscription ID are refered to as the message key, and is used to match an entry in a routing table which provides the possible endpoints expecting to receive messages with the matching key. RMR Message Parameters Each RMR message contains :

:::info Goal: To gain a basic understanding of the basics of Near RT-RIC [x] What's The Purpose of RIC [x] What's The component behind RIC [x] How RIC is implemented in 5G Resources: ORAN Software Community

:::info Goal: To gain a basic understanding of the basics of Cellular Networking by observing how 4G-LTE works [x] How 4G Works [x] How 4G Differs from Previous Generations of Technologies [x] How Radio Access Network is implemented in 4G [ ] How 5G improves from 4G Resources:

:::info Goal: To gain a basic understanding of the OpenRAN [x] What is OpenRan [x] How OpenRAN aims to improve previous generations' technology Resources: Previous Note Introduction to OpenRAN video

:::info Goal: To gain a basic understanding of the 5G Networking using the existing knowledge of 4G/LTE [x] How 5G improves from 4G [x] Key Features of 5G [x] How Radio Access Network is implemented in 5G Resources: Previous Note (4G LTE Systems)