KR100545648B1 - hard handoff resource managing device of the mobile communication system using a trunk grouping manner and controlling method therefore - Google Patents

Abstract

In the present invention as described above, TGN and TMN resources for handoff are allocated by using a trunk group management by receiving TGN and TMN resources for handoff determined from a serving MSC at a target MSC during a hard handoff of a mobile communication system. Grouping is used as it is in the target MSC, so that the number of channels that can be exchanged with each other can be significantly expanded, and the number of channels can be greatly expanded according to the grouped TGN and TMN resource information without additional devices. With more channels available, more calls can be handled, which significantly increases the efficiency of resource management.

Grouped PGN, PMN Trunk, Resource Allocation Request Signal for Handoff, Serving MSC, Target MSC

Description

Hard handoff resource managing device of the mobile communication system using a trunk grouping manner and controlling method therefore}

1 is an explanatory diagram illustrating a resource management apparatus of a mobile communication system using a conventional RTE, CIC trunk.

2 is a flowchart of the conventional resource management apparatus of FIG.

3 is an explanatory diagram illustrating trunk allocation of the conventional resource management apparatus of FIG.

4 is an explanatory diagram for explaining an apparatus of the present invention.

5 is a flowchart of the present invention.

Figure 6 is an explanatory diagram illustrating an embodiment of grouping trunks in the present invention.

<Detailed Description of Codes>

1: subscriber terminal 2: base station

3: base station controller 4: terminating terminal

5: serving MSC 6: base station

7: base station controller 8: target MSC

The present invention relates to a hard handoff resource management apparatus and a control method thereof for a mobile communication system using a trunk grouping method. In particular, a hard handoff TGN and TMN resource determined from a serving MSC in a target MSC during a hard handoff of the mobile communication system is disclosed. The present invention relates to a hard handoff resource management apparatus of a mobile communication system using a trunk grouping method used for trunk resource management by trunk allocation and grouping thereof, and a control method thereof.

In general, a mobile communication system processes a call by assigning a call channel to a mobile communication terminal existing in its sector, wherein the mobile communication terminal is moved away from the base station to which the mobile communication terminal is assigned during the call. Frequently, the jurisdiction moves to a cell or another sector. Accordingly, the adjacent base station performs a function of allocating a new channel instead of the radio frequency channel in use so that the call can be maintained, that is, handover or handoff function.

Then, referring to Figure 1 for a mobile communication system performing the handoff function as described above, by receiving a call signal sent from the calling party subscriber terminal 70 to form a communication path with the destination terminal 71 and hand When off, the serving MSC 72 requesting handoff using the trunk group number (TGN) and trunk member number (TMN) trunk resources, and the TGN and TMN resource allocation request signals requested from the serving MSC 72 are RTE. And a target MSC 73 for handling handoff by executing trunk resource management by changing to Route and CIC (Circuit identification code).

Meanwhile, referring to FIG. 2, a hard handoff method of a conventional mobile communication system having a handoff function as described above, first proceeds to a handoff request determination step (S2) from an initial state (S1), and then from a current mobile communication terminal. Determine if there was a handoff request. At this time, if there is no terminal currently requesting handoff in its sector as a result of the determination during the handoff request determination step (S2), it proceeds to the general call processing execution step (S3) and maintains the currently formed call path, thereby making normal call processing. Run

However, if there is a terminal currently requesting handoff in its sector as a result of the determination during the handoff request determination step (S2), it proceeds to the resource allocation request step (S4) for handoff and the trunk TGN, TMN) is allocated and a resource allocation request signal for handoff is transmitted to the target MSC. After the handoff resource allocation request step S4, the terminal handoff task execution step S5 is performed to convert the TGN and TMN information requested by the target MSC into RTE and CIC information and occupy the trunk by using the same. It forms a physical connection with the serving MSC and processes switching between internal T and S-racks, and then transmits a response signal for resource allocation for handoff to the serving MSC using information converted from RTE and CIC to TGN and TMN. .

That is, when the handoff request signal is received, the serving MSC 72 allocates a trunk currently idle, that is, TGN and TMN, and requests resource allocation for handoff to the target MSC 73 by using the TGN and TMN information. Will be done. At this time, the target MSC (73) converts the TGN, TMN received from the serving MSC (72) to RTE, CIC to manage the trunk resources using this, and transmits the response signal back to the serving MSC (72) Transmit through the conversion process of the above and reverse. That is, between the serving MSC 72 and the target MSC 73, as shown in FIG. 3, only one target MSC 73 transmits / receives a handoff signal through one TGN number and 128 TMN channels corresponding thereto. Process.

 Then, after the terminal handoff operation execution step (S5) proceeds to the handoff execution step (S6) and the serving MSC newly connects the call path between the calling party terminal and the relay line to execute the handoff function between the base station and the target MSC After executing handoff completion notification, switch off the internal T-S-rack.

However, the hard handoff method of the mobile communication system having the conventional handoff function is normally processed when transmitting and receiving RTE and CIC information between the serving MSC and the target MSC for handoff. Some of the 32 channels had to be allocated as hard handoff trunks, so the others could not be allocated as voice trunks. That is, PGN, PMN should be converted into RTE and CIC between the serving MSC and the target MSC using E1. Since the RTE needs to change a TGN value composed of only one power, it is impossible to use more than one E1. In addition, since 32 channels in E1 cannot be used for voice and handoff, all 31 channels except frame O channel need to be allocated for handoff. There was also a problem that the efficiency of the considerably lowered.

Accordingly, the present invention has been invented to solve the conventional problems as described above, grouping the TGN, TMN resource information for the handoff, as it is used in the target MSC, thereby significantly extending the number of channels that can be exchanged with each other accordingly. An object of the present invention is to provide a hard handoff resource management apparatus and a control method of a mobile communication system using a trunk grouping method.

Another object of the present invention is that the number of channels can be greatly expanded according to the grouped TGN and TMN resource information without any additional device, so that more calls can be processed using the expanded channel. The present invention provides a hard handoff resource management apparatus and a control method thereof in a mobile communication system using an increasing trunk grouping method.

The present invention for achieving the above object is a mobile communication system for managing a plurality of base stations and base station controllers, when receiving a handoff request from the terminal in its sector via the base station and one TGN number and subordinate to it A serving MSC requesting a handoff using the grouped resources by grouping several TMN channels into one, and using the grouped TGN and TMN resource allocation request signals received from the serving MSC without changing them. The present invention provides a hard handoff resource management apparatus for a mobile communication system using a trunk grouping method including a target MSC for executing a handoff function by executing trunk resource management.

According to another aspect of the present invention, when there is a terminal requesting a handoff in its sector in a mobile communication network system, the serving MSC groups and assigns one TGN number and several idle TMN channels that are subordinate to it and assigns the grouping TGN, A handoff resource allocation request step of transmitting a handoff resource allocation request signal determined to the target MSC using the TMN information, and the grouped TGN and TMN information received by the target MSC after the handoff resource allocation request step is received. The terminal handoff operation execution step of occupying the trunk using the AS and making a physical connection with the serving MSC, and then using the grouped TGN and TMN information, carries a response signal for resource allocation for handoff and transmits it to the serving MSC. After the terminal handoff operation execution step, the serving MSC uses the received TGN and TMN information to communicate with the originating subscriber terminal. Connecting a call between the new field lines to provide a control method for a hard hand-off resource management equipment in a mobile communication system using a trunk grouping scheme consisting of a handoff execution step of executing the hand-off functions between the base stations.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 4, the mobile communication system to which the present invention is applied receives the outgoing call signal transmitted from the originating subscriber terminal 1 in its sector through a plurality of base stations 2 and base station controllers 3, A service that establishes a call path with the called terminal 4 and allocates resources by grouping several trunk group number (TGN) and trunk member number (TMN) trunks into one when handoffs, and uses the grouped resources to request a handoff. The MSC 5 and the grouped TGN and TMN resource allocation request signals received from the serving MSC 5 are used as they are, and trunk resource management is performed to change the number of base stations 6 and base station controllers 7. It includes a target MSC (8) to handle the handoff function.

The following describes the method of the present invention applied to such a system.

As shown in FIG. 5, the method of the present invention first proceeds from the initial state S1 to the handoff request determination step S2 to determine whether there is a handoff request from the current mobile communication terminal. At this time, if there is no terminal currently requesting handoff in its sector as a result of the determination during the handoff request determination step (S2), it proceeds to the general call processing execution step (S3) and maintains the currently formed call path to perform normal call processing. Run it.

However, if there is a terminal currently requesting handoff in its sector as a result of the determination during the handoff request determination step (S2), the process proceeds to the resource allocation request step (S4) for handoff and the trunk TGN, TMN idle at the serving MSC. ) Groups several groups into one and transmits the allocated grouping TGN and TMN information as a resource allocation request signal for handoff determined as a target MSC. After the resource allocation request step (S4) for handoff, the terminal proceeds to the handoff operation execution step (S5), and the target MSC occupies the trunk using the received grouped TGN, TMN information as it is, and the serving MSC and the physical MSC. After the internal connection is processed, the internal T and S-racks are processed, and the response signal for resource allocation for handoff is carried using the grouped corresponding TGN and TMN information and transmitted to the serving MSC.

That is, when the handoff request signal is received, the serving MSC 5 groups and assigns the currently idle trunks, that is, several TGN and TMN trunks, into one group and uses the grouped TGN and TMN information to the target MSC 8. Resource allocation for handoff is required. In this case, the target MSC 8 occupies and manages trunk resources by using the grouped TGN and TMN without conversion from the serving MSC 5 and transmits the response signal to the serving MSC 5 again. Through the grouped TGN and TMN, the data is transmitted through the inverse conversion process. That is, between the serving MSC 5 and the target MSC 8, as shown in FIG. 6, one TGN number and 128 TMN channels subordinate thereto are grouped, for example, grouped by 3, and then the target MSC 8 is grouped. ) Only one handoff signal is transmitted and received. Therefore, when grouping in the manner of the present invention as described above it can be significantly extended to 128 * 3 or more channels that can only use 128 channels in the prior art.

In addition, since the grouped TGN, TMN is used as it is without conversion in the target MSC (8), it can be seen that the efficiency is significantly increased in terms of resource management.

 Then, after the terminal handoff operation execution step (S5), the process proceeds to the handoff execution step (S6) and the serving MSC newly connects the call path between the calling party terminal and the relay line by using the received TGN and TMN information. The handoff function is executed, the handoff completion notification is issued to the target MSC, and the internal T and S-racks are switched off.

As described above, according to the present invention, TGN, TMN for handoff is used by assigning trunk group TGN and TMN resources for handoff from a serving MSC at a target MSC during trunk handoff of the mobile communication system, and using them for trunk group management. Since resource information is grouped and used in the target MSC, it has an advantage of significantly extending the number of channels that can be exchanged with each other accordingly.

In addition, according to the present invention, since the number of channels is greatly expanded according to the grouped TGN and TMN resource information without any additional device, more calls can be processed using the expanded channel. There is also a significant increase.

On the other hand, the present invention is not limited to the above-described embodiment and the accompanying drawings, it is usually possible in the technical field to which various substitutions, conversions and changes within the scope without departing from the spirit of the present invention. It will be evident to those who have knowledge of.

Claims (2)

In a mobile communication system for managing a plurality of base stations and base station controllers, When handoff is requested from a terminal in its sector via the base station, one TGN number and a number of TMN channels subordinate thereto are grouped into one to allocate resources and use the grouped resources to request handoff. A trunk grouping method comprising an MSC and a target MSC for executing a handoff function by executing trunk resource management without changing the grouped TGN and TMN resource allocation request signals received from the serving MSC. Handheld resource management device of a mobile communication system using a. If there is a terminal requesting a handoff in its sector in the mobile communication network system, the serving MSC groups and assigns one TGN number and several idle TMN channels dependent thereon into one and uses the allocated grouping TGN and TMN information. A handoff resource allocation request step for transmitting a handoff resource allocation request signal determined by an MSC, and after the handoff resource allocation request step, occupies a trunk using the grouped TGN and TMN information received by the target MSC as it is. And performing a physical connection with the serving MSC, and then performing a terminal handoff operation step of transmitting a response signal for resource allocation for handoff to the serving MSC using the grouped corresponding TGN and TMN information, and performing the terminal handoff operation. After the execution phase, the serving MSC uses the received TGN and TMN information to establish a new channel between the calling party's terminal and the trunk line. The connection control method for a hand-off function hard handoff in a mobile communication system using a trunk grouping scheme, characterized in that consisting of the handoff execution step of executing a resource management equipment between the base stations.

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