Search results for "VoIP"
showing 10 items of 10 documents
Uplink DPCCH Gating of Inactive UEs in Continuous Packet Connectivity Mode for HSUPA
2007
In order to further improve the packet performance in the UMTS FDD system, uplink dedicated physical control channel (DPCCH) gating as a scheme is proposed in 3GPP under the work item "continuous connectivity for packet data users". In this paper, the uplink DPCCH gating concept is described and analyzed on both a qualitative and a quantitative level. And the system performance of different gating patterns used in the scheme was investigated by analytical prediction and system level simulations with different channel profiles. As shown, the selection of the gating pattern has a significant influence on the system performance, which is correlated with the uplink data transmission activity an…
Performance enhancements of MBMS and VoIP services in WCDMA/HSPA networks
2009
Advanced voice and data solutions for evolution of cellular network system
2014
DPCCH Gating Gain for VoIP over HSUPA
2007
—In this paper, the concept of DPCCH (Dedicated Physical Control Channel) gating for HSUPA (High Speed Uplink Packet Access) is analyzed. Gating technique has recently been under consideration within WCDMA to inactivate control channels during silent periods of the users, and hence, not to misuse capacity. In order to study the concept benefit, a concrete real-time service is selected in this paper: Voice over IP (VoIP) for mobile communications. It will be shown that VoIP would be highly beneficed by DPCCH gating inclusion in 3GPP specifications. Both analytical and simulation studies were run to confirm the gain expectations. peerReviewed
Studies on high speed uplink packet access performance enhancements
2014
VoIP sistēmu arhitektūras un augstas noslodzes sistēmas realizācija
2021
Bakalaura darbā “VoIP sistēmu arhitektūras un augstas noslodzes sistēmas realizācija” tiek apskatītas VoIP izmantojamās tehnoloģijas – konkrēti - uz SIP protokola bāzētie VoIP telefonijas risinājumi. Darba ietvaros tiek aprakstītas arī SIP-protokola bāzētā telefonijā iesaistītās serveru un klientu puses komponentes, kā arī tiek analizētas risinājumu iespējamās arhitektūras - vienkāršas “biroja centrāles” viss-vienā arhitektūras, kā arī piedāvātas sarežģītas sakaru operatoru risinājuma līmeņa uz komponentēm bazētas arhitektūras, kas darbojas uz atvērtā koda risinājumu pamata. Bakalaura darba rezultātā realizēta un notestēta augstas noslodzes VoIP sistēma, kura kalpo kā prototips, kas ir gata…
Intertīkla protokola balss telefonijas infrastruktūras testu automatizācija nepārtrauktas integrācijas sistēmas ietvaros
2016
Kvalifikācijas darbā “Intertīkla protokola balss telefonijas infrastruktūras testu automatizācija nepārtrauktas integrācijas sistēmas ietvaros” tika izstrādāti testēšanas rīki, kas ļauj lietotājam simulēt servisu noturības testus un ērti tos integrēt tādās nepārtrauktās integrācijas platformās kā Jenkins. Testēšanas rīku kopums ir izstrādāts pēc spējās programmatūras izstrādes metodes - Scrum ar JavaScript, HTML5, CSS un Python valodu palīdzību un ir pieejama lietošanas instrukcija angļu valodā.
Rationaalista voluntarismia : eettinen teko William Ockhamin teoriassa
2003
Prior Experience and Student Satisfaction with E-Tandem Language Learning of Spanish and English
2018
Recent literature in the field of foreign language learning has indicated that classroom learning is not necessarily enough for students to acquire proficiency in a foreign language. Learners who achieve a high level in the target language often combine work in the classroom with activities outside it. At the same time, a number of studies indicate that, when foreign language learners do work with their target language beyond the classroom, it is often to practice the receptive skills of reading and listening as opposed to the productive ones of speaking and writing. For this reason, students at The College of New Jersey in the United States and Universidad de Alcalá in Spain were paired up…