HSS meaning in Telecommunication ?

Answer:

What is Home Subscriber Server mean?

The IP Multimedia Subsystem or IP Multimedia Core Network Subsystem (IMS) is a standardised architectural framework for delivering IP multimedia services. Historically, mobile phones have provided voice call services over a circuit-switched-style network, rather than strictly over an IP packet-switched network. Alternative methods of delivering voice (VoIP) or other multimedia services have become available on smartphones, but they have not become standardized across the industry. IMS is an architectural framework that provides such standardization.

IMS was originally designed by the wireless standards body 3rd Generation Partnership Project (3GPP), as a part of the vision for evolving mobile networks beyond GSM. Its original formulation (3GPP Rel-5) represented an approach for delivering Internet services over GPRS. This vision was later updated by 3GPP, 3GPP2 and ETSI TISPAN by requiring support of networks other than GPRS, such as Wireless LAN, CDMA2000 and fixed lines.

IMS uses IETF protocols wherever possible, e.g., the Session Initiation Protocol (SIP). According to the 3GPP, IMS is not intended to standardize applications, but rather to aid the access of multimedia and voice applications from wireless and wireline terminals, i.e., to create a form of fixed-mobile convergence (FMC). This is done by having a horizontal control layer that isolates the access network from the service layer. From a logical architecture perspective, services need not have their own control functions, as the control layer is a common horizontal layer. However, in implementation this does not necessarily map into greater reduced cost and complexity.

Alternative and overlapping technologies for access and provisioning of services across wired and wireless networks include combinations of Generic Access Network, softswitches and "naked" SIP.

Since it is becoming increasingly easier to access content and contacts using mechanisms outside the control of traditional wireless/fixed operators, the interest of IMS is being challenged.

Examples of global standards based on IMS are MMTel which is the basis for Voice over LTE (VoLTE), Wi-Fi Calling (VoWIFI), Video over LTE (ViLTE), SMS/MMS over WiFi and LTE, USSD over LTE, and Rich Communication Services (RCS), which is also known as joyn or Advanced Messaging, and now RCS is operator's implementation. RCS also further added Presence/EAB (enhanced address book) functionality.

reference

Full Form	Category
Harmony School of Science	Academic & Science
Hungarian Simulation Society	Academic & Science
Henry Sweet Society for the History of Linguistic Ideas	Academic & Science
Humanities and Social Science	Academic & Science
Holocaust Survivor Syndrome	Academic & Science
Horizontal Stretch or Shrink	Academic & Science
High-Strength Steel	Academic & Science
Hissar	Airport Code
Hollow Structural Sections	Business
Huntington Surf and Sport	Business
High Speed Steel	Business
Hire Sales and Service	Business
Highams Systems	Business
Heat Stable Salt	Chemistry
Holy Spirit School	Community
Hit Song Science	Community
Huda Sharawi School	Community
Hey Soul Sister	Community
History of Science Society	Community
High School Story	Computing
Hosting Solution Software	Computing
High Speed System	Computing
Heat Sink Support	Computing
Hypersonic Sound	Computing
High Speed Subshelf	Computing
Hierarchical Secure System	Computing
Hughes Software Systems	Computing
Host Specific Service	Computing
High Strength Substrate	Electronics
Human Surface Shader	General
Happiness Success and Style	General
High Speed Sea	General
Humbucker Single Single	General
Hierarchical Style Sheets	General
Hydronic System Solution	General
HSBC Security Services	General
Highways of Statewide Significance	General
Heavy Spooling Shotgun	General
Human Subjects System	General
Hindu Swayamsevak Sangh	General
Higher Strength Steel	General
Heat Strengthened Steel	General
High Static Swept	General
High Speed Surfacing	General
High Strength Silica	General
Heat Stable Salts	General
High Speed Synchronize	General
Senior Seminar	General
High Speed Sintering	General
Hallow Structural Section	General
Hydropneumatic Suspension System	General
Heavy Super Stock	General
Humber Super Snipe	General
Heartland Sprint Series	General
Hyundai Smart Sense	General
Hap Seng Star	General
High Speed Ship	General
Hollow Structural Solutions	General
Hum Sing Sing	General
High Speed SerDes	General
Hike, Stalk, Shoot	Governmental
High-speed Sea Service	Governmental
Hemophilia Surveillance System	Governmental
Health Safety and Security	Medical
Health Systems Strengthening	Medical
Health system strengthening	Medical
Hospital for Special Surgery	Medical
Homo Sapiens Sapiens	Medical
Hospital for Special Surgery [N.Y.]	Medical
Health Service System	Medical
Hospitality Staffing Solutions	Medical
Hunter Sensor System	Military and Defence
Hunter Sensor Suite	Military and Defence
Health Service Support	Military and Defence
Helmet Sight System	Military and Defence
High Speed Serial	Networking
High Speed Sync	Networking
High Speed Synchronization	Physics Related
Hollow Structural Section	Physics Related
Hissar, India	Regional
High Speed Reader	Space Science
High Stress and Strain	Space Science
Hydraulic Sub-system Simulator	Space Science
Hifi Sports Smart	Sports
Home Subscriber Server	Telecommunication