Research of SIP Signaling Delay in IP Multimedia Subsystem

2014 ◽  
Vol 644-650 ◽  
pp. 4387-4390 ◽  
Author(s):  
Xiang Yu ◽  
Xiao Ning Zhang
Keyword(s):  
Communication System ◽  
Transmission Efficiency ◽  
Ip Multimedia Subsystem ◽  
Radio Communication ◽  
Compression Algorithms ◽  
Factors Affecting ◽  
Signaling Protocol ◽  
Important Index ◽  
Radio Communication System ◽  
Session Setup

Optimizing the transmission efficiency of data is becoming an indispensable job in voice radio communication system. IP Multimedia Subsystem (IMS) standardized Session Initiation Protocol (SIP), which categorize as a signaling protocol for management and maintenance of new multimedia IP-based services. Session setup delay is one of important index of it. In order to reduce SIP signaling delay, to begin with, we analyze and study the factors affecting the session setup delay from different points, and solve the problems in good ways. In the end of the article, we contrast five compression algorithms of SIP signaling.

scholarly journals Aplikasi Monitoring Energi SHS Off-Grid Menggunakan Lora

2021 ◽  
Vol 13 (1) ◽  
pp. 26-32
Author(s):  
Satrio Yudho
Keyword(s):  
Internet Of Things ◽  
Long Range ◽  
Spread Spectrum ◽  
Communication System ◽  
Electricity Consumption ◽  
Radio Communication ◽  
Energy Monitoring ◽  
Chirp Spread Spectrum ◽  
Solar Home System ◽  
Radio Communication System

The manner of efficiency and effective of power usage is the main objective in electricity consumption, one major steps to control the usage is by providing a monitoring to aim the power usage data and process it to information needed. Internet of Things benefit in power and electricity has involved sensors to work as data reader continuously.  LoRa or well known as Long Range radio communication system work with chirp spread spectrum which work from 920 to 923 Mhz in Indonesia. This paper presents implementation of LoRa system to support the prototype of energy monitoring in Solar Home System off-grid

Universal Software Radio Peripheral/GNU Radio-Based Implementation of a Software-Defined Radio Communication System

2019 ◽  
pp. 227-240
Author(s):  
Ehsan Sheybani
Keyword(s):  
Communication System ◽  
Software Defined Radio ◽  
Software Radio ◽  
Block Code ◽  
Radio Station ◽  
Frequency Change ◽  
Gnu Radio ◽  
Radio Communication ◽  
Space Communications ◽  
Radio Communication System

Challenges involved in space communications across wireless channels call for new approaches to radio systems. Due to the growing need for frequency change in modern wireless systems, an adaptive radio system has the highest demand. Software-defined radios (SDR) offer this type of adaptivity as well as compatibility with other standard platforms such as USRP/GNU radio. Despite limitations of this approach due to hardware components, viable modeling and simulation as well as deployable systems are possible using this platform. This chapter presents a detailed implementation procedure for a USRP/GNU radio-based SDR communication system that can be used for practical experiments as well as an academic lab in this field. In this experiment the USRP has been configured to receive signal from a local radio station using the BasicRX model daughterboard. The programmable USRP executes Python block code implemented in the GNU Radio Companion (GRC) on Ubuntu OS.

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