🧪Notes - 5G Open-Source Resource Roundup
🌐 中文版：繁體中文 Architecture: Open-source projects Open5GS - Open5GS contains a series of software components and network functions that implement the 4G/ 5G NSA and 5G SA core functions.https://github.com/open5gs/open5gs open5gs + oai config: https://github.com/s5uishida/open5gs_epc_oai_sample_configopen5gs implements both the 4G EPC and 5G 5GC, so in terms of networking options, option 3, option 7, and option 4 may all be feasible. dockerized Open5GShttps://github.com/herlesupreeth/dock...
🗂️Paper Review: O-RAN and Virtualized 5G Networks
🌐 中文版：繁體中文 This is a survey paper.Title: “Open, Programmable, and Virtualized 5G Networks: State-of-the-Art and the Road Ahead”College: Institute for the Wireless Internet of Things, Northeastern UniversityAuthors: Leonardo Bonati, Michele Polese, Salvatore D’Oro, Stefano Basagni, Tommaso MelodiaCitation: 24 Abstract5G brings many benefits, and software-defined cellular networks bring many changes. There are currently many open-source 5G projects, and this paper introduces many current o...
🧪Notes - 5G Core Network: Mobility Management
🌐 中文版：繁體中文 User identifiers and location identifiersUser identifiers split into permanent and non-permanent: Permanent identifiers Once bound to a user they aren’t modified, offering a degree of privacy 1231. SUPI2. Generic Public Subscription Identifier (GPSI)3. Permanent Equipment Identifier (PEI) Non-permanent identifiers Used to temporarily identify a user; 3GPP periodically changes the identifier 121. 5G Globally Unique Temporary Identifier (5G-GUTI)2. SUCI Location identifiers...
🧪Notes - 5G Network Function Interfaces and Protocol Stacks
🌐 中文版：繁體中文 The N2 interface (control interface and protocol stack)$5G Access,Network \stackrel{N2}{\longleftrightarrow} 5GC(AMF)$ Management procedures: not related to a specific UE, like setting up or resetting the N2 interface Procedures related to a single UE: NAS transport procedures, UE context management, PDU-session resource-related procedures, handover management, etc. Uses the NG-AP protocol (regardless of access network type: 3GPP RAN or N3IWF non-3GPP), which is an application-...
VNF Deployment and Flow Scheduling in Geo-distributed Data Centers
🌐 中文版：繁體中文 AbstractNFV can reduce the equipment procurement and maintenance costs of network operations. Through NFV, network functions can be decoupled from the physical infrastructure and run as virtual network functions (VNFs) on commodity hardware. NFV makes networks more flexible and controllable, but various technical challenges remain, such as how to effectively deploy VNFs across different geographic locations and how to schedule network traffic among geo-distributed data centers. ...
Buffer Overflow Vulnerability Experiment
IntroductionBuffer Overflow Vulnerability is one of the most common and severe security vulnerabilities in the field of software and system security. In the complex software systems of today’s digital age, the threat from hackers or malicious users is ever-present. Buffer Overflow Vulnerability is one of the most concerning threats among them due to the significant threat it poses to computer systems. In simple terms, a buffer overflow vulnerability occurs when code attempts to store data in ...
Leveling Up Linux Admin Skills: Mastering SUDO Permissions and Account Settings
🌐 中文版：繁體中文 When running an ordinary user account on a Linux system, you sometimes need to run commands that require superuser privileges, such as updating packages or downloading files. But if the ordinary user hasn’t been granted sudo privileges, those commands won’t run. To let an ordinary user use sudo, we need to configure the sudoers file. This post covers how to configure sudo permissions along with some other interesting account-access settings. The sudoers config fileOn a Linux sys...
2019 Communications Dept. Graduation Project
🌐 中文版：繁體中文 Preface:Honestly, when first choosing an advisor I didn’t think much about it; I just wanted a relaxed one. I remember my thinking was “for our school, prepping for grad school to transfer to a better school ASAP matters more,” so I didn’t pick a harder topic/advisor, lol. So in the end I found the most relaxed advisor in the whole department, whose project topic was Arduino every year (probably to save money and time, and because it barely needs teaching). 6 project stude...
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