KR20060084747A - A method for no.7 signalling data controlling when inter msc soft handoff in wide code division multiple access system - Google Patents

Abstract

The present invention provides a method for supporting soft handover between switching systems of number 7 signaling data in a mobile communication system, comprising: receiving a message to be transmitted from a user to an arbitrary called party, and including a signal included in a header of the received message Extracting a point and a signal link selector, acquiring an identifier of an RNC corresponding to the signal point from a signal point management table of each of radio network controllers (RNCs) recommended by a public telecommunication network, and a related signal for each RNC Acquiring a link set point which is routing information of an identifier of the obtained RNC by searching RNC management tables to which routing information having a point and a signal link set according to the associated signaling point are mapped; In the routing table of the point, identify the active link corresponding to the signaling point of the received message, Delivering the received message through the identified activation link to provide a table for managing all of the RNCs in the communication network and the signaling points associated with the RNC, so that when an interhandover occurs in the RNCs of different MGWs, There is an effect that can provide a seamless mobile communication service. In addition, while managing a large number of system signal points, it is possible to efficiently operate the network by minimizing the message routing time in the WTAN intermediate node.

WCDMA, No.7 signaling data, RNC, Routing Table, Signallin Link Set

Description

{A Method For No.7 Signaling Data Controlling When Inter MSC Soft Handoff In Wide Code Division Multiple Access System} during soft handover between switching systems in an asynchronous mobile communication system             

1 is a view showing a schematic structure of a general mobile communication network.

2 is a diagram illustrating signal points generally managed for each network.

3 is a schematic diagram of a WCDMA Top Asynchronous Transfer Mode (WTAN) network for soft handover according to a preferred embodiment of the present invention.

4A-4B illustrate an RNC table and a signal point management table in accordance with a preferred embodiment of the present invention.

5A is a diagram illustrating an example of an operation of updating a mask bit of an SLP activated according to SLS.

5B is a diagram of a routing table update procedure in accordance with a preferred embodiment of the present invention.

6 is a procedure for acquiring a called party signal link of a user message.

7 is a procedure diagram of message delivery using signal link information acquired by MTP according to a preferred embodiment of the present invention.

The present invention relates to a method for managing number 7 signaling data in a wideband code division multiple access (WCDMA) system, and more particularly to a method for supporting soft handover between switching systems. It is about.

In general, a signaling point (hereinafter, referred to as 'SP') refers to independent devices in a network that communicate using a number 7 signaling scheme, and unique identification factors are assigned to each signal point to identify the signal points. Is given.

Communication devices that communicate using number 7 signaling in a mobile communication system include a mobile services switching center (MSC), a home location register, a base station controller (BSC). "Visitor Location Register" ("VLR"), etc., and the devices are given different unique SP codes.

1 is a view showing a schematic structure of a general mobile communication network.

Referring to FIG. 1, a plurality of Media Gate Ways (hereinafter, referred to as 'MGW') 110, 120, and 130 processes protocols for media other than an incoming / outgoing call processing protocol, respectively. A plurality of RNCs are connected, and each of the RNCs is connected with two node ratios. Grouped by the RNCs connected to each of the MGWs (110, 120, 130) to form a group (hereinafter referred to as 'RCSI'). That is, the MGW 120 is connected to 16 RNCs 120a to p to form the RCSI 140. Each of the RNCs 120a to p is connected to two node ratios 122 to 128. The RNCs and Node Bs are communication nodes constituting a Radio Access Network (RAN) system.

2 is a diagram illustrating signal points generally managed for each network.

Referring to FIG. 2, the MTP (Message Transfer Part), which is physically directly connected to the MSC and performs a number 7 message routing and distribution function, manages 16 RNC 0-15s limited to each network, and 0xaa for each RNC 0-15. Maps and manages signal points such as ~ 0xqq.

As described above, RAN systems belonging to one MSC network according to the related art are grouped into RCSIs for each MGW, and there is a problem that message routing between RAN systems that do not exist in the same RCSI group is impossible.

In addition, there is a problem of managing the signal points as limited as the number of nodes, such as RNC managed in one network by managing only the signal points as nodes managed by the MTP.

Accordingly, an object of the present invention, which was devised to solve the problems of the prior art operating as described above, is a signal point management method required for the message routing and distribution function of the MTP belonging to the message transfer part of No. 7, and PLMN (Public Land). It provides RNC and signaling point management table that can manage huge nodes of 4096 RNC_IDs recommended by Mobile Network.

Another object of the present invention is to reduce the signal point management search time by using the RNC and the signal point management table, and to provide a method for smoothly delivering a message to a desired power station.

Another object of the present invention is to provide smooth soft handover between MSCs using the RNC and signaling point management tables.

In order to achieve the above object, an embodiment of the present invention provides a method for supporting soft handover between exchange systems of number 7 signaling data in a communication system.

Receiving a message to be transmitted from a user to an arbitrary called party, extracting a signal point and a signal link selector included in a header of the received message;

Obtaining an identifier of an RNC corresponding to the signal point from each signal point management table of each of the radio network controllers (RNCs) recommended by the public telecommunication network;

Searching for the RNC management tables to which the RNC related signaling points and routing information having a signal link set according to the related signaling points are mapped, to obtain a link set point which is routing information of the identifier of the obtained RNC;

The activation table corresponding to the signal point of the received message is identified in the obtained routing table of the link set point, and the received message is transmitted through the identified activation link.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the preferred embodiment of the present invention. Like reference numerals are used to designate like elements even though they are shown in different drawings, and detailed descriptions of related well-known functions or configurations are not required to describe the present invention. If it is determined that it can be blurred, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

3 is a block diagram of a WCDMA Top Asynchronous Transfer Mode (WTAN) network for soft handover according to a preferred embodiment of the present invention.

Referring to FIG. 3, a TAN_0 (Top ATM Network) 310 is connected to a plurality of GAN_0 (320a) to GAN_y (320z), and each of the GAN_0 to y (320a to z). Is connected to 16 RNCs. For example, the GAN_0 320a is connected to the RNC_0 to RNC_15 330a to p, and the GAN_y 320z is connected to the RNC_0 to RNC_15 340a to p. If there is no physical path between the RNC 310a and the RNC 330p when handing over from the RNC_0 330a of the GAN_0320a to the RNC_15 (330p) of the GAN_y 320p. Exchange messages using WTAN.

Accordingly, the present invention provides a RNC table for accommodating all 4096 RNCs presented by the PLMN for message routing of the MTP managed by the WTAN, and a table for acquiring the identifiers of the RNCs using the RNCs and mapped signal points. By preconfiguring, it consists of a method of acquiring a signal link for routing to an associated signaling point when there is a message to be delivered or transmitted from RNCs belonging to different MSCs, and a method of delivering a message therethrough.

Hereinafter, a method of constructing a table for mapping an RNC, a signal point, and a signal link will be described with reference to FIGS. 4A to 4B.

4A-4B, the RNC table 410 has as many as 4096 RNC indexes as indicated by the maximum PLMN, and mappings to which the routing information having associated signal points and corresponding signal link sets are mapped, respectively, of the RNC indexes. With tables. Link set point (LSP) is included in the routing information, and other information is not related to the present invention and thus description thereof is omitted.

The signal point table 420 has an index (hereinafter, referred to as DPC) of 16384 power point (Destination Point Codes) as recommended by the International Telecommunication Union (ITU-T), and the DPC is '0 to 0x3FFF'. It is composed of 14 bits. Each DPC includes an EQUIP state and an RNC_ID.

Next, a signaling link point having an activated link in a signal link set obtained through an LSP of a specific RNC in the RNC table 410 and indicating an activated signal link for each signaling link selector; Hereinafter, a routing table to which SLP is assigned) is configured.

5A is a diagram illustrating an example of an operation of updating a mask bit of an SLP activated according to SLS.

Referring to FIG. 5, when the first signal link is activated, the table 510 has an SLP of an activated signal link 'a' and an effective link count table of 'a' (Avail Link Count Table, 'cnt'). ) Has a value of 0, and the mask bit MASK_BIT shows '1111 1111 1111 1111 1111 1111 1111 1111'.

The table 520 shows a case where the second signal link is activated. The SLP of the activated signal link is 'b', the cnt of 'b' is 1, and thus the updated masks of SLP 'a' and 'b'. Show bits

The table 530 shows a case in which the third signal link is activated. If the SLP of the activated signal link is 'c', and if the signal link is activated, the cnt of the 'c' is 2 and thus the SLP 'a' and Show updated mask bits of 'b' and 'c'.

5B is a flowchart illustrating a routing table update procedure according to a preferred embodiment of the present invention.

Referring to FIG. 5B, in order to map the activated SLP to the SLS received from the user, the SLP is checked in step 501. In this case, the SLP is represented by a, b, and c. In step 503, mask bits such as the tables 510, 520, and 530 are input for each SLP, and in step 505, the SLS index is sequentially shifted from 0 to 31.                     

In operation 507, the mask bits of the SLPs are left shifted (MASK_BIT >> SLS) to determine whether a mask bit having '1' is the same as the index order of the SLS for the first time among the mask bits of the left shifted SLP. If the determination result is the same as the index order of the SLS, in step 509, the SLP is mapped to the index of the corresponding SLS. If the determination is not the same as the order of the SLS, the process returns to step 505.

Specifically, when the index of the SLS of the user is 0, the SLP having the first bit from the far right among the mask bits of the SLPs of the table 530 is 'a'. Therefore, b is mapped to SLS of 1 above. If the index of the SLS of the user is 1, the SLP having the second most right bit from the mask bits of the SLPs of the table 530 is 'b'. Therefore, b is mapped to SLS of 1 above. When the index of the SLS of the user is 1, the SLP having the third bit from the far right of the mask bits of the SLPs of the table 530 is 'b'. Therefore, b is mapped to SLS of 1 above. If the index of the SLS of the user is 2, the SLP having the third bit from the far right of the mask bits of the SLPs of the table 530 is 'c'. Therefore, b is mapped to SLS of 1 above.

Through the above procedure, the table 540 to which the activated SLP is mapped is completed for every 32 SLS indexes.

The routing table 540 is mapped with an SLS index of 32 signal links, an SLP that is the same as the order of the mask bits in which the first 1 is at the end and the index order of the corresponding SLS.

The RNC table 410, the signal point management table 420, and the routing table 540 maintain an organic relationship so that they can be efficiently used according to their purpose.

Hereinafter, a method in which an MTP transfers a number 7 message requested from a user to a called party through a number 7 signaling network according to the present invention will be described with reference to FIGS. 4 to 7.

When the MTP receives the message transfer request from the user unit, the MTP performs the procedure of FIG. 6 to obtain a signal link corresponding to the physical information with the signal point of the message.

Referring to FIG. 6, in step 610, the MTP receives a message requesting to be transmitted to an arbitrary called party from a user, and extracts DPC and SLS information included in a header of the received message. For example, the DPC is 'y' and the SLS is 'x'.

In step 620, the MPT checks whether there is an identifier of the RNC corresponding to the DPC in the signal point management table 602, and returns to step 610 if the RNC identifier is not present. If there is an identifier of the RNC, the RNC identifier is extracted. The identifier of the RNC is 'RNC_YY'.

In step 630, the MTP checks whether there is a extracted routing table of 'RNC_YY', and returns to step 610 if there is no corresponding routing table. If there is a corresponding routing table 604 as a result of the checking, an LSP of routing information is obtained in step 640. In step 650, the MTP acquires 'c', the SLP of 'x', which is the SLS of the received message, from the obtained routing table 606 of the LSP.

In step 650, the MTP delivers the received message through the acquired SLP 'c'.

As described above, by constructing and utilizing a table using a signal point index as a key, all 4096 RNC_IDs can be searched, and the time required to carry signal link information can be reduced.

7 is a flowchart illustrating message delivery using signal link information acquired by an MTP according to an exemplary embodiment of the present invention.

Referring to FIG. 7, in step 710, the MTP receives a message to be transmitted from a user to an arbitrary called party, and in step 720, the MTP extracts a signal point and an SLS included in a header of the received message.

In step 730, the MTP acquires a corresponding signal link by using the extracted signal point and SLS from a routing table provided in advance.

In step 740, the MTP routes the received message to the obtained signal link.

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 those equivalent to the scope of the claims.

In the present invention operating as described in detail above, the effects obtained by the representative ones of the disclosed inventions will be briefly described as follows.

The present invention provides a table that manages all of the RNCs in the communication network and the signal points associated with the RNCs, so that when an interhandover occurs in the RNCs of different MGWs, a seamless mobile communication service can be provided to the user. . In addition, while managing a large number of system signal points, it is possible to efficiently operate the network by minimizing the message routing time in the WTAN intermediate node.

Claims (4)

A method for supporting soft handover between switching systems of number 7 signaling data in a mobile communication system, Receiving a message to be transmitted from a user to an arbitrary called party, extracting a signal point and a signal link selector included in a header of the received message; Obtaining an identifier of an RNC corresponding to the signal point in a signal point management table of each of radio network controllers (RNCs); Searching for the RNC management tables to which the RNC related signaling points and routing information having a signal link set according to the related signaling points are mapped, to obtain a link set point which is routing information of the identifier of the obtained RNC; And identifying an activation link corresponding to a signal point of the received message in the routing table of the obtained link set point, and transmitting the received message through the identified activation link. The method of claim 1, wherein the RNC management table, And 4096 RNC identifiers. The method of claim 1, wherein the routing table, And a signal link selector index of 32 signal links and an activated signal link for each signal link selector index. The method of claim 3, wherein the activated signal link, And mapping a signal link point that is the same as the order of the mask bits in which the first 1 is at the end and the index order of the corresponding SLS.

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