3GPP TS V (). Technical Specification. 3rd Generation Partnership Project;. Technical Specification Group Services and System Aspects ;. ETSI TS V (). 1. 3GPP TS version Release Reference. RTS/TSGSva Keywords. LTE, UMTS. ETSI. Descriptor and Table of Contents (1 of 58) for 3GPP TS – Architecture enhancements for non-3GPP accesses.
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This patent application is incorporated herein by this reference in its entirety. Field of the Inveniion. The present invention generally relates to telecommunication. More specifically, the invention relates to method and system for redirecting roaming traffic- to preferred operators across multiple telecommunication networks. As telecommunication technology has progressed, numerous mobile communication standards have been developed. These standards are broadly categorized into second generation 2Gthird generation 3G and the future, fourth generation 4G technologies.
LTE technology offers a wireless broadband system with higher data rates, lower latency, and higher spectrum efficiency. To keep up with the competition, more and more operators are adapting the newer LTE technology standard.
These network operators provide voice and data services to their own subscribers and to subscribers from other networks, When the network operator provides service to a subscriber from a foreign country, it is referred to as “international roaming”.
When the network operator provides service to a subscriber from another network in the same country, it is referred to as “domestic roaming”. An operator always has a preference for one or more operators over another set of operators. Various network operators have partnership agreements with each other that include more favorable roaming charges than non-partners receive. Partner networks are “preferred” networks for the network operator’s subscriber to register with when roaming. Non-partner networks are “non-preferred” networks to the subscriber.
Network operators can maximize their margins and the roamers can get more attractive roaming rates and services if roamers roam on their home mobile operator’s preferred partner networks. Over the last few years, the revenues to network operators from home subscribers have consistently declined due to increased competition and resulting pricing pressures.
On the other hand, revenues from roamers have consistently grown in the same period due to increased mobile penetration in local markets and an increase in travel. Hence, protecting the existing roaming revenues and growing them further has become an important priority for the network operators worldwide.
Some operators also own networks in various countries. These operators would like to make sure their out-roamers stay within the group properties, or stay on preferred networks, in order to gain the best service experience even when roaming. They will also be able to offer geography based price plans for example, a single rate all across Western Europe or South East Asia to users who have subscribed to such plans, in addition, as new technologies like LTE keep rolling out, operators can control the rollout schedule across their own properties and also make sure interoperability issues are taken care of.
Keeping roaming subscribers on preferred networks gives the best service experience to the subscriber. However, current methods of controlling which network a subscriber registers on when roaming have disadvantages. One previous patent from the inventors of this application was directed towards a method and system for facilitating redirection of network traffic towards a preferred network. However, that patent was focusing on GSM network.
Considering the current scenario where LTE is widely getting adapted, there is a need in the art for a system and method facilitating redirection of network traffic across multiple networks including LTE and GSM, Summary. The present invention is directed towards a method and system for redirecting roaming network traffic in an LTE network.
The method includes observing a registration process of a subscriber in a visited network. The method further includes upon successful registration, sending one or more messages to the visited network to induce a re-registration attempt by the subscriber to another visited network.
The present invention in another embodiment also provides a method for redirecting roaming network traffic in an LT E network. The method includes intercepting a Diameter registration request of a subscriber in a visited network. The method further includes sending a Diameter Update Location Answer Reject message to the visited network, where the Diameter Update Location Answer Reject message results in an error code.
The present invention in another embodiment also provides a method for redirecting roaming network traffic in one or more telecommunication networks.
The method further includes identifying the subscriber’s registration on at least one of an LTE network or a GSM network. If registration is due to loss of LTE coverage, then the method includes sending one or more messages to the visited network to induce a re- registration attempt by the subscriber to another visited network. The present invention in another embodiment also provides a system for redirecting roaming network traffic in a telecommunication network, The system includes an NTR module that observes a registration 3bpp of a subscriber in a visited network.
The NTR module further sends one or more messages to the visited st to induce a re-registration attempt by the subscriber to another visited network.
In the drawings, the same or similar reference numbers identity similar elements or acts. In the following description, for purposes of explanation, specific numbers, materials and configurations are set forth in order to provide a thorough understanding of the present invention.
STEERING OF ROAMING IN LTE AND LEGACY NETWORK ENVIRONMENT – MOBILEUM, INC.
It will be apparent, however, to one having ordinary skill in the art that the present, invention may be practiced without these specific details.
In some instances, well-known features may be omitted or simplified, so as not to obscure the present invention. Furthermore, reference in the specification to “one embodiment” or “an embodiment” means that a particular feature, structure or characteristic, described in connection with the embodiment, is included in at least one embodiment of the present invention.
The appearance of the phrase “in an embodiment”, in various places in the specification, does not necessarily refer to the same embodiment. The present invention provides a system and a method for redirecting roaming traffic across multiple telecommunication networks.
In accordance with another embodiment of the present invention, a group of operators may deploy the NTR solution to steer their subscribers to a set of preferred operators. In such an embodiment, the NTR module is deployed at a centralized location that is connected to a host network, in its various implementation of the present invention, the NTR solution is implemented in monitoring mode or in- signaling mode. These network elements communicate with each other over a Signaling System 7 SS7 link.
It will be apparent to a person skilled in the art that various steps of the flowchart would be executed by the NTR module At stepa registration of a subscriber in a visited network is observed. Thereafter, once the registration is successful, at stepthe NTR module sends one or more messages to VPMN to induce a re-registration attempt by roamer In one embodiment of the present invention, roamer registers to an LTE network and the messages are Diameter messages.
In one embodiment of the present invention, NTR module sends these messages, while being deployed in monitoring mode.
3GPP TS (1 of 58) – Architecture enhancements for non-3GPP accesses
In another embodiment of the present invention, NTR module sends these messages, while being deployed in in-signaling mode. In another embodiment of the present invention, at stepNTR module sends a list of 2402 visited networks to the roamer while being in VPMN to induce a re-registration attempt by the roamer to another visited network.
These messages are sent directly to roamer ‘s SIM card. The call flow for this embodiment, is identical to Fig.
As mentioned above, the NTR solution can be deployed both in monitoring and in-path mode. The Diameter LTE steering enables to control the radio access technology. In other words, it.
The rejection of the 3pp Registration procedures results in various error codes in the radio interface of the mobile of roamer In accordance with various embodiments of the present invention, the NTR module is able to induce the following new error codes on the radio interfaces:.
Cause 15 no suitable cells in Tracking Area12 ”tracking area not allowed”, 13 “roaming not allowed in this tracking area and it forces the UE to reselect another RAT in the same PMN, The location area is added to the list of “forbidden LAs for 24302 which is stored in the mobile. The mapping table to be applied is as follows:. Hence, they 3gpp an applet to open an IP channel ys specific events. The OTA server may then rs for a dynamic preference list. This request is intercepted by the NTR module At this stage, the NTR module sends the list of preferred networks where it wants to steer its subscriber.
In accordance with various other embodiment of the present invention, the NTR module is also able to redirect network traffic across multiple networks from different RAT. In the context of coexistence of LTE with pre-LTE technology, the mobility management of outbound roamers may happen 3ggpp different fashions, from a core network perspective:.
One challenge of the previous steering solution is to identify the current registration status of the subscriber. This information is required to rs apply the rejection principles linked to the observed GSM UL.
It is therefore required to identify in the scenario of the subscriber as a GSM UL does not provided any information. This misleads the NTR module that would assume a possible manual registration of the subscriber.
The observed behavior will vary on handset type data- or voice-centricbut would be likely to end up in an ineffective steering of roaming action. It should be 234022 for a person skilled in the art that an independent MAP based NTR platform is likely to interfere with the MAP message as it would be unaware of a previous Diameter registration.
EP2891367A2 – Steering of roaming in lte and legacy network environment – Google Patents
This would affect negatively the user experience at a time of a call activity. Hence, the NTR solution of the present invention is enhanced with 3gp; capabilities like the NTR solution must have information about the two sets of registration 3glp Diameter and MAP. In accordance with an embodiment of the present invention, the NTR module in such case performs SoR by first observing a registration process of the subscriber in VPMN If registration is due to loss of LTE coverage, then NTR module sends messages to the MME 1 16 to induce a re- registration attempt by the subscriber to another visited network.
However, in order to check for above-mentioned conditions, the NTR module gains some knowledge about the registration. The timer is maintained per subscriber. A second set of information is based on the observation of specific fields in the MAP message e. A third set of information is based on active subscriber state polling.
In case the NTR module finds that roamer is within the LTE network, it then validates via a timing condition or message content whether the registration is expected to be related to a CSFB or an actual loss of coverage. However, the timing condition may be overruled by specific messaging fields e.
CSMO flag or by implementing a polling mechanism which informs that the subscriber is currently busy in a call or still attached to the EPS domain. With above intelligence, an operator can deploy the NTR solution in multiple combinations, as shown in the table below. It will also be apparent to a person skilled in the art that these two interfaces in different directions may not have to be the same technologies. Moreover, there could be multiple types of interface in both directions.
The present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, OF an embodiment containing both hardware and software elements.
In accordance with an embodiment of the present invention, software, including but not limited to, firmware, resident software, and microcode, implements the invention. Furthermore, the invention can take the form of a computer program product, accessible from a computer-usable or computer-readable medium providing program code for use by, or in connection with, a computer or any instruction execution system. For the purposes of this description, a computer-usable or computer readable medium can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
The medium can be an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system or apparatus or device or a propagation medium. Examples of a computer-readable medium include a semiconductor or solid state memory, magnetic tape, a removable computer diskette, a random access memory RAMa read-only memory ROMa rigid magnetic disk and an optica!
Current examples of optical disks include compact disk. The components of present system described above include any combination of computing components and devices operating together, The components of the present system can also be components or subsystems within a larger computer system or network. Unless the context clearly requires otherwise, throughout the description and the claims, the words “comprise,” “comprising,” and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in a sense of “including, but may not be limited to,” Words using the singular or plural number also include the plural or singular number respectively, Additionally, the words “herein,” “hereunder,” “above,” “below,” and words of similar import refer to this application as a whole and not to any particular portions of this application, When the word “or” is used in reference to a list of two or more items, it covers ail of the following interpretations: The above description of illustrated embodiments of the present system is not intended to be exhaustive or to limit the present system to the precise form disclosed.