{"id":4006,"date":"2026-03-18T11:32:56","date_gmt":"2026-03-18T11:32:56","guid":{"rendered":"https:\/\/blog.lebara.co.uk\/?p=4006"},"modified":"2026-04-08T11:37:02","modified_gmt":"2026-04-08T10:37:02","slug":"how-roaming-works-technically-in-mobile-networks","status":"publish","type":"post","link":"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/","title":{"rendered":"Cum func\u021bioneaz\u0103 tehnic roaming-ul \u00een re\u021belele mobile"},"content":{"rendered":"<p>C\u00e2nd telefonul dvs. mobil se conecteaz\u0103 la o re\u021bea str\u0103in\u0103 <a href=\"https:\/\/blog.lebara.co.uk\/ro\/how-to-find-out-what-network-youre-on\/\">re\u021bea<\/a> \u00eentr-o alt\u0103 \u021bar\u0103, \u00een spatele scenei se declan\u0219eaz\u0103 un lan\u021b complex de procese tehnice. Acest articol explic\u0103 modul tehnic \u00een care func\u021bioneaz\u0103 roamingul \u00een re\u021belele mobile, acoperind mecanismele de semnalizare, autentificare, rutare \u0219i facturare care fac ca <a href=\"https:\/\/blog.lebara.co.uk\/ro\/how-to-cut-the-cost-of-international-calls-on-a-mobile-phone\/\">interna\u021bional<\/a> conectivitate posibil\u0103.<\/p>\n\n\n\n<p>Roaming-ul permite SIM-ului dvs. s\u0103 continue s\u0103 utilizeze num\u0103rul dvs. de telefon \u00een timp ce se conecteaz\u0103 la o re\u021bea vizitat\u0103 oriunde \u00een lume. Imagina\u021bi-v\u0103 c\u0103 ateriza\u021bi \u00een Spania ca abonat Vodafone din Marea Britanie \u00een 2026 - dispozitivul dvs. mobil detecteaz\u0103 automat Orange Espa\u00f1a, se autentific\u0103 prin operatorul dvs. de origine \u0219i v\u0103 permite s\u0103 verifica\u021bi e-mailul, s\u0103 efectua\u021bi apeluri vocale \u0219i s\u0103 utiliza\u021bi <a href=\"https:\/\/blog.lebara.co.uk\/ro\/%ef%bf%bchow-much-data-is-optimal\/\">date mobile<\/a> f\u0103r\u0103 a schimba <a href=\"https:\/\/blog.lebara.co.uk\/ro\/a-beginners-guide-to-sim-cards\/\">cartele SIM<\/a>.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Cuprins<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Tabelul de con\u021binut\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/#Core_Concepts_Home_Network_Visited_Network_and_Roaming_Agreements\" >Concepte de baz\u0103: Re\u021bea de origine, re\u021bea vizitat\u0103 \u0219i acorduri de roaming<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/#Device_and_Radio_Layer_How_Your_Phone_Finds_and_Joins_a_Visited_Network\" >Dispozitivul \u0219i stratul radio: Cum g\u0103se\u0219te \u0219i se al\u0103tur\u0103 telefonul dvs. unei re\u021bele vizitate<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/#Subscriber_Authentication_and_Security_How_the_Networks_Verify_You\" >Autentificarea \u0219i securitatea abona\u021bilor: cum v\u0103 verific\u0103 re\u021belele<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/#Mobility_Management_and_Location_Updates\" >Gestionarea mobilit\u0103\u021bii \u0219i actualizarea loca\u021biei<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/#Call_and_SMS_Routing_While_Roaming\" >Rutarea apelurilor \u0219i SMS-urilor \u00een roaming<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/#Data_Roaming_PDP_Contexts_APNs_and_Tunnels\" >Roaming de date: Contexte PDP, APN-uri \u0219i tuneluri<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/#Inter-Standard_Roaming_and_Legacy_Technologies\" >Inter-Standard Roaming \u0219i tehnologii vechi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/#Roaming_Billing_Charging_Records_and_Settlement\" >Facturarea serviciilor de roaming, \u00eenregistr\u0103ri de taxare \u0219i decontare<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/#Regulation_Policy_Control_and_Roaming_Restrictions\" >Reglementarea, controlul politicilor \u0219i restric\u021biile de roaming<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/#eSIM_Multi-IMSI_and_the_Future_of_Roaming\" >eSIM, Multi-IMSI \u0219i viitorul roaming-ului<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/#Summary_Putting_the_Technical_Pieces_Together\" >Rezumat: Punerea laolalt\u0103 a pieselor tehnice<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Core_Concepts_Home_Network_Visited_Network_and_Roaming_Agreements\"><\/span>Concepte de baz\u0103: Re\u021bea de origine, re\u021bea vizitat\u0103 \u0219i acorduri de roaming<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Re\u021beaua PLMN (Public Land Mobile Network) de origine este operatorul de re\u021bea la care v-a\u021bi abonat ini\u021bial - de exemplu, Vodafone UK. C\u00e2nd c\u0103l\u0103tori\u021bi <a href=\"https:\/\/blog.lebara.co.uk\/ro\/using-data-abroad-what-you-need-to-know\/\">\u00een str\u0103in\u0103tate<\/a>, re\u021beaua local\u0103 la care v\u0103 conecta\u021bi devine PLMN vizitat\u0103, cum ar fi Orange Espa\u00f1a.<\/p>\n\n\n\n<p>Roamingul interna\u021bional func\u021bioneaz\u0103 numai atunci c\u00e2nd operatorii semneaz\u0103 acorduri de roaming care specific\u0103 detaliile tehnice de interconectare \u0219i tarifele cu ridicata. Aceste acorduri se bazeaz\u0103 pe cadre globale men\u021binute de organisme precum GSMA, care standardizeaz\u0103 procesele, inclusiv fi\u0219ierele TAP (Transferred Account Procedure) pentru schimbul de facturi.<\/p>\n\n\n\n<p>Iat\u0103 cum se rela\u021bioneaz\u0103 entit\u0103\u021bile cheie:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Re\u021beaua local\u0103: de\u021bine abonamentul dumneavoastr\u0103, men\u021bine profilul dumneavoastr\u0103 principal \u00een bazele de date (HLR\/HSS\/UDM)<\/li>\n\n\n\n<li>Re\u021bea vizitat\u0103: furnizeaz\u0103 infrastructura radio local\u0103 \u0219i g\u0103zduie\u0219te temporar conexiunea dvs.<\/li>\n\n\n\n<li>Partener de roaming: orice operator str\u0103in cu un acord semnat care permite abona\u021bilor operatorului dvs. de origine s\u0103 se conecteze<\/li>\n<\/ul>\n\n\n\n<p>Profilul dvs. de abonat - inclusiv permisiunile de serviciu, permisiunile de roaming \u0219i starea creditului - r\u0103m\u00e2ne permanent \u00een baza de date a re\u021belei de origine. Re\u021beaua vizitat\u0103 de\u021bine \u00eenregistr\u0103ri temporare doar c\u00e2t timp sunte\u021bi conectat.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Device_and_Radio_Layer_How_Your_Phone_Finds_and_Joins_a_Visited_Network\"><\/span>Dispozitivul \u0219i stratul radio: Cum g\u0103se\u0219te \u0219i se al\u0103tur\u0103 telefonul dvs. unei re\u021bele vizitate<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Atunci c\u00e2nd porni\u021bi telefonul mobil \u00een str\u0103in\u0103tate, acesta scaneaz\u0103 operatorii disponibili prin citirea semnalelor de difuzare. Dispozitivul verific\u0103 ID-urile PLMN \u00een raport cu lista de roaming preferat\u0103 stocat\u0103 \u00een SIM pentru a identifica re\u021belele permise.<\/p>\n\n\n\n<p>SIM\/USIM con\u021bine date esen\u021biale care conduc la selectarea re\u021belei:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IMSI (International Mobile Subscriber Identity) pentru identificare unic\u0103<\/li>\n\n\n\n<li>Liste de roaming preferate care specific\u0103 operatorii vizita\u021bi autoriza\u021bi<\/li>\n\n\n\n<li>Chei de securitate (Ki, K) pentru autentificare<\/li>\n<\/ul>\n\n\n\n<p>Telefonul efectueaz\u0103 selectarea celulei \u00een benzile de frecven\u021b\u0103 acceptate - \u00een general 800 MHz, 1800 MHz \u0219i 2600 MHz \u00een Europa - \u0219i cite\u0219te informa\u021biile sistemului pentru a confirma c\u0103 roamingul este permis. \u00cen prezent, majoritatea dispozitivelor accept\u0103 mai multe tehnologii: GSM\/EDGE, UMTS, LTE \u0219i <a href=\"https:\/\/blog.lebara.co.uk\/ro\/which-iphones-support-5g\/\">5G<\/a> NR, permi\u021b\u00e2nd conectivitatea global\u0103.<\/p>\n\n\n\n<p>Trepte de la aterizare la conectare:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Telefonul scaneaz\u0103 re\u021belele disponibile \u0219i cite\u0219te ID-urile PLMN<\/li>\n\n\n\n<li>Dispozitivul compar\u0103 re\u021belele detectate cu lista de roaming a SIM<\/li>\n\n\n\n<li>Telefonul selecteaz\u0103 re\u021beaua permis\u0103 cu prioritatea cea mai mare<\/li>\n\n\n\n<li>Dispozitivul trimite cererea de \u00eenregistrare c\u0103tre re\u021beaua vizitat\u0103<\/li>\n\n\n\n<li>Re\u021beaua vizitat\u0103 interogheaz\u0103 re\u021beaua de origine pentru autentificare<\/li>\n<\/ul>\n\n\n\n<p>Dac\u0103 nu exist\u0103 niciun acord de roaming \u00eentre operatorul de origine \u0219i re\u021beaua local\u0103, dispozitivul afi\u0219eaz\u0103 \u201cNo Service\u201d (F\u0103r\u0103 serviciu) \u00een ciuda radio <a href=\"https:\/\/blog.lebara.co.uk\/ro\/boosting-your-mobile-signal-tips-for-improving-reception\/\">semnal<\/a> fiind prezent.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Subscriber_Authentication_and_Security_How_the_Networks_Verify_You\"><\/span>Autentificarea \u0219i securitatea abona\u021bilor: cum v\u0103 verific\u0103 re\u021belele<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Odat\u0103 conectat la o celul\u0103 vizitat\u0103, re\u021beaua vizitat\u0103 identific\u0103 SIM-ul dvs. \u0219i trebuie s\u0103 confirme cu operatorul de origine c\u0103 acesta este autentic \u0219i are permisiunea de a se deplasa. Acest lucru previne utilizarea frauduloas\u0103 \u0219i asigur\u0103 facturarea corect\u0103.<\/p>\n\n\n\n<p>Procesul de autentificare urmeaz\u0103 protocolul AKA (Authentication and Key Agreement):<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Re\u021beaua vizitat\u0103 extrage IMSI-ul dvs. \u0219i \u00eel trimite c\u0103tre re\u021beaua de origine<\/li>\n\n\n\n<li>Acas\u0103 HLR\/HSS genereaz\u0103 vectori de autentificare care con\u021bin provoc\u0103ri aleatorii<\/li>\n\n\n\n<li>Provocarea este trimis\u0103 dispozitivului dumneavoastr\u0103, care calculeaz\u0103 un r\u0103spuns utiliz\u00e2nd cheia secret\u0103 stocat\u0103 numai \u00een SIM<\/li>\n\n\n\n<li>Dac\u0103 r\u0103spunsul corespunde a\u0219tept\u0103rilor re\u021belei locale, autentificarea reu\u0219e\u0219te<\/li>\n<\/ol>\n\n\n\n<p>Date schimbate \u00een timpul autentific\u0103rii:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IMSI (identitatea abonatului)<\/li>\n\n\n\n<li>Vectori de autentificare de acas\u0103 AuC (Authentication Center)<\/li>\n\n\n\n<li>Valori de provocare-r\u0103spuns<\/li>\n\n\n\n<li>Statutul permisiunii de roaming \u0219i orice condi\u021bii de interdic\u021bie<\/li>\n\n\n\n<li>Chei de cifrare \u0219i de integritate pentru criptarea traficului<\/li>\n<\/ul>\n\n\n\n<p>Cheia secret\u0103 nu p\u0103r\u0103se\u0219te niciodat\u0103 SIM-ul sau re\u021beaua local\u0103, asigur\u00e2nd securitatea chiar \u0219i \u00een cazul \u00een care infrastructura re\u021belei vizitate este compromis\u0103. Aceste chei derivate cripteaz\u0103 traficul utilizatorului \u0219i semnalizarea dintre telefonul dvs. \u0219i sta\u021bia de baz\u0103 vizitat\u0103.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mobility_Management_and_Location_Updates\"><\/span>Gestionarea mobilit\u0103\u021bii \u0219i actualizarea loca\u021biei<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Re\u021belele de telefonie mobil\u0103 trebuie s\u0103 \u0219tie \u00eentotdeauna cu aproxima\u021bie unde v\u0103 afla\u021bi pentru a furniza apeluri, mesaje SMS \u0219i sesiuni de date \u00een roaming. F\u0103r\u0103 aceast\u0103 urm\u0103rire, comunica\u021biile primite nu ar avea nicio destina\u021bie.<\/p>\n\n\n\n<p>Re\u021belele organizeaz\u0103 acoperirea \u00een zone ierarhizate: Zone de localizare (LA) \u00een 2G, Zone de rutare (RA) \u00een re\u021belele de pachete 3G \u0219i Zone de urm\u0103rire (TA) \u00een LTE\/5G. Atunci c\u00e2nd v\u0103 deplasa\u021bi de la aeroportul CDG din Paris c\u0103tre centrul ora\u0219ului, traversarea limitelor zonelor declan\u0219eaz\u0103 actualizarea loca\u021biei.<\/p>\n\n\n\n<p>Procesul de actualizare a loca\u021biei:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dispozitivul dumneavoastr\u0103 detecteaz\u0103 intrarea \u00eentr-o nou\u0103 zon\u0103 de urm\u0103rire<\/li>\n\n\n\n<li>Telefonul trimite cererea de actualizare a loca\u021biei c\u0103tre nucleul re\u021belei vizitate<\/li>\n\n\n\n<li>Re\u021beaua vizitat\u0103 \u00ee\u0219i actualizeaz\u0103 \u00eenregistr\u0103rile locale (VLR\/MME\/AMF)<\/li>\n\n\n\n<li>Re\u021beaua vizitat\u0103 semnaleaz\u0103 HLR\/HSS de origine cu noua loca\u021bie a nodului de deservire<\/li>\n\n\n\n<li>Re\u021beaua de acas\u0103 recunoa\u0219te \u0219i \u00eenregistreaz\u0103 loca\u021bia dvs. curent\u0103<\/li>\n<\/ul>\n\n\n\n<p>Atunci c\u00e2nd cineva apeleaz\u0103 num\u0103rul dvs. sau trimite un mesaj, re\u021beaua caut\u0103 dispozitivul dvs. \u00een ultima zon\u0103 de localizare cunoscut\u0103. Telefonul r\u0103spunde, iar conexiunea este stabilit\u0103.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Call_and_SMS_Routing_While_Roaming\"><\/span>Rutarea apelurilor \u0219i SMS-urilor \u00een roaming<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Logica de rutare difer\u0103 semnificativ \u00eentre comunica\u021biile de ie\u0219ire \u0219i cele de intrare. Apelurile ini\u021biate de mobil \u0219i SMS-MO circul\u0103 diferit fa\u021b\u0103 de apelurile terminate de mobil \u0219i SMS-MT.<\/p>\n\n\n\n<p>Pentru apelurile efectuate de pe telefonul mobil \u00een roaming, forma\u021bi un num\u0103r E.164 (cum ar fi +44 20...). MSC sau gateway-ul IMS al re\u021belei vizitate analizeaz\u0103 cifrele \u0219i direc\u021bioneaz\u0103 apelul fie local \u00een \u021bara vizitat\u0103, fie interna\u021bional c\u0103tre destina\u021bie.<\/p>\n\n\n\n<p>Pentru primirea apelurilor \u00een str\u0103in\u0103tate, procesul este mai complex:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Apelantul formeaz\u0103 MSISDN (num\u0103rul dvs. de telefon original)<\/li>\n\n\n\n<li>Apelul ajunge la gateway-ul re\u021belei de acas\u0103 MSC<\/li>\n\n\n\n<li>Re\u021beaua de origine solicit\u0103 HLR pentru loca\u021bia curent\u0103 de roaming<\/li>\n\n\n\n<li>HLR returneaz\u0103 un MSRN (Mobile Station Roaming Number) temporar<\/li>\n\n\n\n<li>Apelul este redirec\u021bionat c\u0103tre MSC vizitat unde sunte\u021bi \u00eenregistrat<\/li>\n\n\n\n<li>Re\u021beaua vizitat\u0103 caut\u0103 dispozitivul dvs. \u0219i efectueaz\u0103 apelul<\/li>\n<\/ul>\n\n\n\n<p>VoLTE \u0219i VoNR moderne ancoreaz\u0103 adesea apelurile de voce \u00een nucleul IMS de acas\u0103, chiar \u0219i atunci c\u00e2nd accesul radio se face prin re\u021beaua vizitat\u0103, \u00eembun\u0103t\u0103\u021bind calitatea \u0219i simplific\u00e2nd rutarea.<\/p>\n\n\n\n<p>Pentru SMS, SMSC-ul re\u021belei de origine ac\u021bioneaz\u0103 \u00eentotdeauna ca punct de ancorare. Mesajele de semnalizare circul\u0103 \u00eentre re\u021beaua de origine \u0219i cea vizitat\u0103 folosind protocoalele MAP over SS7 sau Diameter pentru a transmite mesajele indiferent de loca\u021bie.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Data_Roaming_PDP_Contexts_APNs_and_Tunnels\"><\/span>Roaming de date: Contexte PDP, APN-uri \u0219i tuneluri<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><a href=\"https:\/\/blog.lebara.co.uk\/ro\/a-guide-to-data-roaming\/\">Date \u00een roaming<\/a> adaug\u0103 complexitate, deoarece <a href=\"https:\/\/blog.lebara.co.uk\/ro\/ip-ratings-explained-how-your-smartphone-can-withstand-water-and-dust\/\">IP<\/a> sesiunile trebuie s\u0103 fie ancorate undeva \u00een timp ce accesul radio este \u00eendep\u0103rtat. Dispozitivul sau SIM-ul dvs. con\u021bine set\u0103ri APN (Nume punct de acces) care determin\u0103 modul \u00een care este direc\u021bionat traficul de date.<\/p>\n\n\n\n<p>Re\u021beaua vizitat\u0103 utilizeaz\u0103 APN pentru a decide dac\u0103 s\u0103:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Redirec\u021bionarea traficului de acas\u0103 c\u0103tre PGW\/UPF de acas\u0103 (cel mai frecvent)<\/li>\n\n\n\n<li>Furnizarea unei defalc\u0103ri locale \u00een cazul \u00een care datele ies la nivel local (utilizat\u0103 \u00een unele scenarii UE)<\/li>\n<\/ul>\n\n\n\n<p>\u00cen re\u021belele 2G\/3G, activarea datelor implic\u0103 stabilirea contextului PDP (Packet Data Protocol). \u00cen 4G\/5G, acest lucru a evoluat c\u0103tre stabilirea unui purt\u0103tor implicit sau a unei sesiuni PDU, re\u021beaua vizitat\u0103 coordon\u00e2ndu-se cu infrastructura de origine.<\/p>\n\n\n\n<p>Calea de tunelare pentru datele de roaming:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Telefonul transmite pachete prin intermediul accesului radio al re\u021belei vizitate<\/li>\n\n\n\n<li>Pachetele ajung \u00een nucleul re\u021belei vizitate (SGSN\/MME\/AMF)<\/li>\n\n\n\n<li>Traficul este \u00eencapsulat \u00een tuneluri GTP<\/li>\n\n\n\n<li>Tunelurile traverseaz\u0103 re\u021bele interna\u021bionale GRX sau IPX<\/li>\n\n\n\n<li>Pachetele ies la gateway-ul de date de origine (GGSN\/PGW\/UPF)<\/li>\n\n\n\n<li>Gateway \u00eenainteaz\u0103 c\u0103tre internet; traficul de retur urmeaz\u0103 calea invers\u0103<\/li>\n<\/ul>\n\n\n\n<p>Din perspectiva internetului, deseori p\u0103re\u021bi a fi \u00een spa\u021biul IP al \u021b\u0103rii dvs. de origine, ceea ce afecteaz\u0103 serviciile de geolocalizare.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Inter-Standard_Roaming_and_Legacy_Technologies\"><\/span>Inter-Standard Roaming \u0219i tehnologii vechi<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Din punct de vedere istoric, re\u021belele de telefonie mobil\u0103 au utilizat tehnologii diferite - GSM a dominat Europa, \u00een timp ce CDMA a prevalat \u00een America de Nord. Roamingul interstandard a necesitat telefoane multimodale \u0219i hub-uri de roaming specializate pentru a face leg\u0103tura \u00eentre aceste sisteme.<\/p>\n\n\n\n<p>\u00cen prezent, industria s-a consolidat \u00een jurul standardelor 3GPP (GSM\/UMTS\/LTE\/5G NR), simplific\u00e2nd semnificativ compatibilitatea. \u00cenchiderea continu\u0103 a re\u021belelor 2G\/3G \u00eentre 2025-2030 \u00eenseamn\u0103 c\u0103 capacitatea VoLTE este obligatorie pentru voce \u00een multe pie\u021be.<\/p>\n\n\n\n<p>Ce trebuie s\u0103 suporte un dispozitiv pentru roaming global \u00een 2026:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>benzi LTE \u00een mai multe regiuni (banda 1, 4, 7 etc.)<\/li>\n\n\n\n<li>Benzile 5G NR (n78, n79, n1)<\/li>\n\n\n\n<li>Capacitate VoLTE pentru apeluri vocale<\/li>\n\n\n\n<li><a href=\"https:\/\/blog.lebara.co.uk\/ro\/%ef%bf%bca-guide-to-sim-card-sizes\/\">eSIM<\/a> suport pentru schimbarea flexibil\u0103 a profilului<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Roaming_Billing_Charging_Records_and_Settlement\"><\/span>Facturarea serviciilor de roaming, \u00eenregistr\u0103ri de taxare \u0219i decontare<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Operatorul vizitat furnizeaz\u0103 serviciul, dar \u00eel taxeaz\u0103 pe operatorul din \u021bara de origine, care apoi v\u0103 taxeaz\u0103 pe dumneavoastr\u0103. Acest proces se bazeaz\u0103 pe \u00eenregistr\u0103ri detaliate ale utiliz\u0103rii.<\/p>\n\n\n\n<p>Re\u021belele genereaz\u0103 \u00eenregistr\u0103ri de date de \u00eenc\u0103rcare care con\u021bin:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IMSI \u0219i MSISDN (identificatori de abonat)<\/li>\n\n\n\n<li>Tipul serviciului, destina\u021bia, ora, durata\/volumul<\/li>\n\n\n\n<li>Identificator PLMN vizitat \u0219i ID celul\u0103<\/li>\n\n\n\n<li>Tarife cu ridicata aplicabile<\/li>\n<\/ul>\n\n\n\n<p>Fi\u0219ierele TAP agreg\u0103 aceste \u00eenregistr\u0103ri \u0219i sunt trimise periodic - de obicei zilnic - de la operatorii vizita\u021bi la operatorii din \u021bara de origine. Sistemul de facturare al re\u021belei de origine aplic\u0103 apoi tariful dumneavoastr\u0103 specific, fie c\u0103 este vorba de un plan de roaming cu date incluse sau de tarife de roaming cu plata \u00een func\u021bie de utilizare.<\/p>\n\n\n\n<p>Ciclul de via\u021b\u0103 al unui eveniment de roaming:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Utiliza\u021bi un serviciu (apel, SMS, date)<\/li>\n\n\n\n<li>Re\u021beaua vizitat\u0103 genereaz\u0103 o \u00eenregistrare CDR\/utilizare<\/li>\n\n\n\n<li>\u00cenregistr\u0103rile sunt compilate \u00een fi\u0219iere TAP<\/li>\n\n\n\n<li>Fi\u0219iere TAP transmise c\u0103tre operatorul de origine<\/li>\n\n\n\n<li>Sistemul de facturare la domiciliu aplic\u0103 pre\u021burile \u0219i le adaug\u0103 la factur\u0103<\/li>\n<\/ul>\n\n\n\n<p>Cadrele de reglementare au un impact semnificativ asupra tarifelor de roaming. Regulamentul UE \u201cRoam Like at Home\u201d, activ din iunie 2017 \u0219i prelungit p\u00e2n\u0103 \u00een 2032, elimin\u0103 suprataxele \u00een interiorul UE, permi\u021b\u00e2nd utilizatorilor de telefonie mobil\u0103 s\u0103 pl\u0103teasc\u0103 tarife na\u021bionale.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Regulation_Policy_Control_and_Roaming_Restrictions\"><\/span>Reglementarea, controlul politicilor \u0219i restric\u021biile de roaming<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Dincolo de tehnologie, roamingul este modelat de politicile de reglementare \u0219i de operator. Elementele PCRF\/PCF (Policy and Charging Rules Function) pun \u00een aplicare controale, inclusiv plafoane de date, limitarea vitezei dup\u0103 praguri \u0219i restric\u021bii de servicii, cum ar fi blocarea <a href=\"https:\/\/blog.lebara.co.uk\/ro\/what-does-tethering-mean\/\">tethering<\/a> \u00een str\u0103in\u0103tate.<\/p>\n\n\n\n<p>Exemple concrete de reglementare:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>UE \u201cRoam Like at Home\u201d elimin\u0103 suprataxele pentru c\u0103l\u0103toriile \u00een UE<\/li>\n\n\n\n<li>Acordurile bilaterale Australia-Noua Zeeland\u0103 prev\u0103d rate reduse<\/li>\n\n\n\n<li>Unii operatori blocheaz\u0103 roaming-ul permanent (SIM-uri utilizate \u00een str\u0103in\u0103tate \u00een mod continuu) pentru a evita pierderile angro<\/li>\n<\/ul>\n\n\n\n<p>Efectele vizibile pentru utilizatori ale acestor politici:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Viteza scade dup\u0103 dep\u0103\u0219irea limitelor de utilizare corect\u0103<\/li>\n\n\n\n<li>Alerte SMS la 80% cu privire la aloca\u021bia de roaming<\/li>\n\n\n\n<li>\u00centreruperea automat\u0103 a serviciului la limite stricte de date<\/li>\n\n\n\n<li>Anumite servicii nu sunt disponibile (MMS, apeluri premium)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"eSIM_Multi-IMSI_and_the_Future_of_Roaming\"><\/span>eSIM, Multi-IMSI \u0219i viitorul roaming-ului<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tehnologia eSIM schimb\u0103 fundamental roaming-ul, permi\u021b\u00e2nd desc\u0103rcarea \u0219i schimbarea mai multor profiluri f\u0103r\u0103 a schimba cardul fizic. Un c\u0103l\u0103tor poate desc\u0103rca un profil eSIM local \u00eenainte de plecare, activ\u00e2nd instantaneu conectivitatea de tip local.<\/p>\n\n\n\n<p>Multi-IMSI permite unui singur SIM s\u0103 prezinte identit\u0103\u021bi diferite \u00een regiuni diferite, permi\u021b\u00e2nd operatorilor din \u021bara de origine s\u0103 orienteze abona\u021bii c\u0103tre partenerii de roaming prefera\u021bi din motive de cost sau calitate. SIM-urile electronice pentru c\u0103l\u0103torii la nivel mondial utilizeaz\u0103 centrele de roaming \u0219i multi-IMSI pentru a oferi acoperire \u00een zeci de \u021b\u0103ri prin intermediul unui singur profil desc\u0103rcabil.<\/p>\n\n\n\n<p>Tehnic a\u0219teptat <a href=\"https:\/\/blog.lebara.co.uk\/ro\/the-latest-trends-in-mobile-phone-technology\/\">tendin\u021be<\/a> 2026-2030:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dependen\u021b\u0103 VoLTE mai larg\u0103 pe m\u0103sur\u0103 ce 2G\/3G se termin\u0103<\/li>\n\n\n\n<li>5G Roaming autonom cu protocoale native<\/li>\n\n\n\n<li>Slicing de re\u021bea pentru servicii de roaming premium<\/li>\n\n\n\n<li>Interfunc\u021bionare IPX extins\u0103 \u00eentre operatori<\/li>\n\n\n\n<li>eSIM devine implicit fa\u021b\u0103 de SIM-ul fizic<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Summary_Putting_the_Technical_Pieces_Together\"><\/span>Rezumat: Punerea laolalt\u0103 a pieselor tehnice<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Roaming-ul conecteaz\u0103 accesul radio, autentificarea, gestionarea mobilit\u0103\u021bii, rutarea \u0219i facturarea \u00eentr-un singur sistem f\u0103r\u0103 \u00eentreruperi. Atunci c\u00e2nd utiliza\u021bi telefonul \u00een str\u0103in\u0103tate, dispozitivul dvs. se conecteaz\u0103 la o re\u021bea vizitat\u0103, identitatea este verificat\u0103 de HLR\/HSS-ul de origine, loca\u021bia este actualizat\u0103 \u00een ambele re\u021bele, traficul este redirec\u021bionat sau rutat corespunz\u0103tor, iar utilizarea este facturat\u0103 acas\u0103.<\/p>\n\n\n\n<p>Principalele concluzii:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Autentificarea nu compromite niciodat\u0103 cheile secrete - re\u021beaua local\u0103 r\u0103m\u00e2ne autoritar\u0103<\/li>\n\n\n\n<li>Urm\u0103rirea loca\u021biei utilizeaz\u0103 zone ierarhice, nu precizie de tip GPS<\/li>\n\n\n\n<li>Datele utilizatorilor par adesea s\u0103 provin\u0103 din spa\u021biul IP din \u021bara de origine<\/li>\n\n\n\n<li>Apelurile de intrare adaug\u0103 laten\u021b\u0103 datorit\u0103 interog\u0103rilor HLR \u0219i aloc\u0103rii MSRN<\/li>\n\n\n\n<li>Controalele de politic\u0103 permit operatorilor s\u0103 implementeze plafoane, limitarea \u0219i restric\u021biile<\/li>\n<\/ul>\n\n\n\n<p>Roaming-ul va deveni din ce \u00een ce mai mult bazat pe IP \u0219i pe politici, pe m\u0103sur\u0103 ce re\u021belele tradi\u021bionale se \u00eenchid \u0219i 5G Standalone se maturizeaz\u0103. \u00cen\u021belegerea acestor straturi tehnice v\u0103 ajut\u0103 s\u0103 r\u0103m\u00e2ne\u021bi conectat \u00een mod mai inteligent atunci c\u00e2nd c\u0103l\u0103tori\u021bi \u0219i s\u0103 lua\u021bi decizii \u00een cuno\u0219tin\u021b\u0103 de cauz\u0103 cu privire la serviciile mobile \u0219i cerin\u021bele dispozitivelor.<\/p>","protected":false},"excerpt":{"rendered":"<p>When your mobile phone connects to a foreign network in a different country, a complex chain of technical processes fires up behind the scenes. This article explains how roaming works technically in mobile networks, covering the signalling, authentication, routing, and billing mechanisms that make international connectivity possible. Roaming lets your SIM keep using your telephone&#8230;<\/p>\n<div><a class=\"read-more button-link\" href=\"https:\/\/blog.lebara.co.uk\/ro\/how-roaming-works-technically-in-mobile-networks\/\">Cite\u0219te mai mult<\/a><\/div>","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[22],"tags":[],"class_list":["post-4006","post","type-post","status-publish","format-standard","hentry","category-phones","clearfix",false],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/blog.lebara.co.uk\/ro\/wp-json\/wp\/v2\/posts\/4006","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.lebara.co.uk\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.lebara.co.uk\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.lebara.co.uk\/ro\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.lebara.co.uk\/ro\/wp-json\/wp\/v2\/comments?post=4006"}],"version-history":[{"count":2,"href":"https:\/\/blog.lebara.co.uk\/ro\/wp-json\/wp\/v2\/posts\/4006\/revisions"}],"predecessor-version":[{"id":4020,"href":"https:\/\/blog.lebara.co.uk\/ro\/wp-json\/wp\/v2\/posts\/4006\/revisions\/4020"}],"wp:attachment":[{"href":"https:\/\/blog.lebara.co.uk\/ro\/wp-json\/wp\/v2\/media?parent=4006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.lebara.co.uk\/ro\/wp-json\/wp\/v2\/categories?post=4006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.lebara.co.uk\/ro\/wp-json\/wp\/v2\/tags?post=4006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}