KR20020011189A - Redirection method for homezone service - Google Patents

Abstract

PURPOSE: A method for converting a termination for a homezone service is provided to easily classify a number for converting the termination when performing a termination converting service by recording a telephone number firstly called from a termination subscriber having multiple numbers. CONSTITUTION: An MSC(Mobile Switching Center) A(200) transmits a location information request(LOCREQ) to an HLR(Home Location Register)(300)(1). The HLR(300) receives the location information(LOCREQ) and transmits a routing request signal{RoutingReq(LegInfor)} to an MSC B(400)(2'). The MSC B(400) transmits a routing request acknowledge signal{RoutingRegAck(TLDN(Temporary Local Directory Number)} to the HLR(300)(3). The HLR(300) transmits the TLDN to the MSC A(200)(4). The MSC A(200) transmits an IAM(Initial Address Message) to the MSC B(400)(5). The MSC B(400) receives the IAM(TLDN) and performs a paging request(PagingRQ) to a BSC(Base Station Controller)(500)(6). The BSC(500) transmits a paging request acknowledge(PagingRQAck) to the MSC B(400)(7). The MSC B(400) transmits a termination conversion request signal{REDREQ(LegInfo)} to the MSC A(200)(8'). The MSC A(200) transmits a number transmission request signal{TTNR(LegInfor)} to the HLR(300) for obtaining termination conversion information(9'). The HLR(300) receives the number transmission request signal{TTNR(LegInfor)} and confirms leg information, and transmits an NSN as the termination conversion number to the MSC A(200) when leg information is 2 and transmits an MDN as the termination conversion number to the MSC A(200) when leg information is 3(10).

Description

Call forwarding method for home zone service {REDIRECTION METHOD FOR HOMEZONE SERVICE}

The present invention relates to a homezone service method in a mobile communication system. In particular, a call forwarding service for a phone number used in a home zone area may be performed separately from a call forwarding service for a phone number used outside a home zone area. It's about how to do that.

The home zone service is to allocate a specific area (home zone) to the mobile subscriber and apply a different fee system when the subscriber makes a call within the area and when making a call outside.

1 is a diagram illustrating a signaling flow for a temporary local directory number (TLDN) and a call forward no answer additional service in a conventional home zone service method.

The flow as shown is for the most common call forwarding non-response, and reference can be made to standards such as IS-41C or ITU-T Q.764 and the MSC Operator's Guide.

It is assumed that the called party has multiple numbers (NSN and MDN) and the out of home zone option is set to MDN.

Reference numeral 1 denotes a mobile station (hereinafter referred to as MSC) A 200 transmitting a location information request (LOCREQ) to the HLR 300.

Reference number 2 indicates that the HLR 300 received the location information request (LOCREQ) delivers a routing request signal RoutingReq to the MSC B 400.

Reference number 3 indicates that the MSC B 400 transmits a routing request response signal (RoutingReqAck (TLDN)) to the HLR 300.

Reference numeral 4 indicates that the HLR 300 delivers the TLDN to the MSC A 200.

Reference numeral 5 denotes an initial address message (hereinafter referred to as IAM) that the MSC A 200 sends to the MSC B 400. The IAM includes the TLDN received from the HLR 300. {IAM (TLDN)}

Reference numeral 6 indicates that the MSC B 400 receives the IAM (TLDN) and makes a call request {PagingRQ} to the BSC 500.

Reference numeral 7 indicates that the BSC 500 delivers a call request response {PagingRQAck} to the MSC B 400.

Reference numeral 8 indicates that the MSC B 400 transmits a call forward request signal REDREQ to the MSC A 200. In such a case, when the call forwarding request is made, the call response {PagingRP} does not exist, that is, the case is no response. For example, if the called subscriber is out of the home zone even though the call is made to the NSN, it is in an unresponsive state.

Reference numeral 9 denotes a case in which the MSC A 200 sends a number transfer request signal (TTNR) to the HLR 300 to obtain call forwarding information.

Reference numeral 10 indicates that the HLR 300 receiving the number transfer request signal TTNR finds and forwards the call forwarding number.

In practice, however, the forwarding number may not be transmitted as indicated by reference numeral 10 above. This is because you do not know which number the call came from. In conclusion, it is not possible to distinguish between NSN forwarding and MDN forwarding.

Accordingly, an object of the present invention is to provide a method for easily distinguishing a number to be forwarded when a call forwarding service is performed by remembering a telephone number first called to a recipient having multiple numbers.

In order to achieve the above object, the present invention provides a call forwarding method for a home zone service, comprising: a first process in which a first mobile switching center transmits a location information request to an affiliate location register, and the affiliate location received the location information request; A second process of the registrar delivering a routing request signal including leg information to a second mobile switching center, a third process of the second mobile switching center transmitting a routing request response signal to the belonging location register, and the belonging location register; A fourth process of transmitting a temporary local directory number to the first mobile switching center, a fifth process of sending, by the first mobile switching station, an initial address message including the temporary local directory number to the second mobile switching center; A sixth process in which a second mobile switching station receives the initial address message and makes a call request to a base station controller; and to the second mobile switching station. If the call request response is not transmitted from the base station controller, the second mobile switching center checks the leg information to confirm whether the called subscriber is a multi-numbered subscriber, and if the multi-numbered subscriber is the first call to the first mobile switching center. A seventh process of transmitting a call forwarding request signal including leg information indicating a number, an eighth process of the first mobile switching center sending a number transfer request signal to the belonging location register to obtain call forwarding information; The ninth process of receiving, by the location registration register, receiving the transfer request signal, finding and forwarding the forwarding number to the first mobile switching center according to the leg information; and the first mobile switching center receiving the forwarding switching number to the corresponding exchange. And a tenth process of switching the call.

1 is a diagram illustrating a signaling flow for a temporary location directory number and a call forwarding non-responsive supplementary service in a conventional home zone service method.

2 is a diagram illustrating a signaling flow for a temporary location directory number and a call forwarding non-responsive additional service in a home zone service method according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, specific matters such as parameters and the like are shown, which are provided to help a more general understanding of the present invention, and the present invention may be practiced without these specific matters. It will be self-evident to him. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

2 is a diagram illustrating a signaling flow for a TLDN and a call forwarding non-responsive supplementary service in a home zone service according to an embodiment of the present invention.

Compared with FIG. 1 described above, leg information (LegInfo) on a signal transmitted from the HLR 300 to the MSC A 200 or the MSC B 400 or a signal transmitted from the MSC B 400 to the MSC A 300. Is added further.

First, assume that the called subscriber has multiple numbers (NSN and MDN) and the out of home zone option is set to MDN.

Reference numeral 1 indicates that the MSC A 200 conveys a location information request (LOCREQ) to the HLR 300.

Reference numeral 2 'indicates that the HLR 300 received the location information request (LOCREQ) transmits a routing request signal (RoutingReq (LegInfo)) to the MSC B 400. The parameter called leg information (LegInfo) included in the routing request signal RoutingReq (LegInfo) has a value of 1. Here, the leg information parameter of 1 indicates that the called party has multiple numbers (NSN and MDN) and the out of home zone option as MDN. The leg information parameter passed to the MSC B 400 is stored in a visitor location register (hereinafter referred to as a VLR).

Reference number 3 indicates that the MSC B 400 transmits a routing request response signal (RoutingReqAck (TLDN)) to the HLR 300.

Reference numeral 4 indicates that the HLR 300 delivers the TLDN to the MSC A 200.

Reference numeral 5 denotes an initial address message (hereinafter referred to as IAM) that the MSC A 200 sends to the MSC B 400. The IAM includes the TLDN received from the HLR 300. {IAM (TLDN)}

Reference numeral 6 indicates that the MSC B 400 receives the IAM (TLDN) and makes a call request {PagingRQ} to the BSC 500.

Reference numeral 7 indicates that the BSC 500 delivers a call request response {PagingRQAck} to the MSC B 400.

Reference numeral 8 'indicates that the MSC B 400 transmits a call forward request signal {REDREQ (LegInfo)} to the MSC A 200. In such a case, when the call forwarding request is made, the call response {PagingRP} does not exist, that is, the case is no response. For example, if the called subscriber is out of the home zone even though the call is made to the NSN, it is in an unresponsive state.

The leg information has a value of 2 or 3, for example, the former indicates that the first call number was NSN and the latter indicates that the original call number was MDN.

Reference numeral 9 'indicates a case in which the MSC A 200 sends a number transfer request signal {TTNR (LegInfo)} to the HLR 300 to obtain call forwarding information. The number transfer request signal {TTNR (LegInfo)} includes the leg information included in the call forward request signal {REDREQ (LegInfo)} received from the MSC B400.

Reference numeral 10 denotes that the HLR 300 receiving the number transfer request signal {TTNR (LegInfo)} checks leg information, and if it is 2, delivers NSN to the MSC A 200 as a call forwarding number. If the information is 3, MDN is transferred as the forwarding number.

The MSC A 200 finally receiving the call forwarding number by the signaling change as described above switches the call to an exchange such as the corresponding MSC or another PSTN 100.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention allows the call forwarding service for the phone number used in the home zone area to be performed separately from the call forwarding service for the phone number used outside the home zone area, thereby satisfying various needs of subscribers. There is this. In addition, there is no need to change or update a special standard to provide additional services, so there is an advantage in that a roaming system can receive services when roaming between operators.

Claims (4)

In the call forwarding method for home zone services, A first process by which the first mobile switching center forwards the location information request to the registered location register; A second process of transmitting the routing request signal including leg information to the second mobile switching center by the belonging location register receiving the location information request; Transmitting, by the second mobile switching center, a routing request response signal to the affiliated location register; Transmitting a temporary local directory number from the position register to the first mobile switching center; A fifth step of sending, by the first mobile switching station, an initial address message including the temporary local directory number to the second mobile switching center; A sixth process in which the second mobile switching center receives the initial address message and makes a call request to a base station controller; If a call request response is not transmitted from the base station controller to the second mobile switching center, the second mobile switching station checks the leg information to determine whether the called party is a multi-numbered subscriber, and if the multi-numbered subscriber is the first mobile station, the second mobile switching station. A seventh step of transmitting, to the mobile switching station, a call forward request signal including leg information indicating an original call number; An eighth step of sending, by the first mobile switching center, a number transfer request signal to the affiliated location register to obtain call forwarding information; A ninth step of receiving the number transfer request signal by the belonging location register and searching for a call forwarding number according to the leg information to the first mobile switching center; And a tenth step in which the first mobile switching station receiving the forwarding number transfers the call to the corresponding exchange. The method of claim 1, The leg information parameter included in the routing request signal in the second step has a specific value, wherein the specific value indicates that the called party has multiple numbers. The method of claim 1, The leg information parameter is stored in a visitor location register of the second mobile switching center. The method of claim 1, And the number transfer request signal includes the leg information included in the call transfer request signal received from the second mobile switching center as it is.