KR20040014857A - Operation method of 2G/3G mobile communication network - Google Patents

Abstract

PURPOSE: A method for operating a mobile communication network having different generations is provided to efficiently operate resources between an upper generation system and a lower generation system, and to support a service by interworking between an upper generation network and a lower generation network or with a system, thereby efficiently using the resources. CONSTITUTION: A system confirms whether a terminal is the second-generation terminal or the third-generation terminal(S121). If the terminal is the third-generation terminal, the system originates a call(S122), and decides whether the third-generation system approves the call(S123). If so, the third-generation system proceeds the call(S123a). If the third-generation system does not approve the call, the third-generation system transmits an SRM(Service Redirection Message) to the terminal to attempt the call to the second-generation system(S124). If the call is approved, the call is set up to the second-generation system(S125,S126). If the call is not approved, a call connection fails(S125a).

Description

Generation method of different mobile communication network {Operation method of 2G / 3G mobile communication network}

The present invention relates to the inefficiency that may occur when each mobile communication network is operated independently, especially when mobile generation networks (2G / 3G) having different generations are operated at the same time. Considering the fact that the nationwide network cannot be installed at the same time and the new network is expanded to the cluster type, it is possible to use the existing network and the new network at the same time to improve efficiency in the operation of the mobile communication network at the beginning of the new network configuration. The present invention relates to another mobile communication network operation method.

Recently, as a new mobile communication technology is developed and the mobile communication network evolves, an efficient operation method between an existing mobile communication network and a newly installed mobile communication network is provided. Currently, mobile communication networks supporting IS-95A / B Spec. Are being installed and operated nationwide. Recently, a mobile communication network supporting Spec. Of CDMA2000-1x and CDMA2000-1x Ev-DO has been commercialized and started to operate, and there is a problem that operators cannot install a nationwide network at the time of installing a new network. ), It is gradually expanding the scope of new networks.

The system frequency resources are 2G frequency resources (2G FA) and 3G frequency resources (3G FA), and the types of services mainly used by UEs are different, and the number of frequency resources according to regional characteristics, 2G UEs, and 3G Since the number of terminals is different, the frequency resources are divided and managed between generations. Frequencies that do not support third generation services in the system are called second generation frequency resources (FA), and frequencies that support third generation are called third generation frequencies. However, since the third generation frequency may accommodate the service of the second generation terminal to be suitable for the previous system, it should be considered that the second generation terminal may use the third generation frequency resource.

The frequency resource FA is to allocate a channel bandwidth of 1.25 MHz to be actually used among the frequency bands used by the terminal to communicate with the base station system.

As two different mobile communication networks are installed and operated as described above, two mobile communication networks exist simultaneously in the same area. This is the case when CDMA2000-1x was developed and installed. Since the operators have difficulty in setting up a temporary national network, an efficient operation plan between the 2nd generation network and the 3rd generation network (after CDMA2000-1x) is needed.

However, in the conventional operation of mobile communication networks, only operations in a single network (2G) are considered, and as a third generation network is newly installed, second generation or third generation system determination, registration, and standby are performed. In the handoff, voice call origination and termination, handoff, and data call processing, the two mobile communication networks are operated separately. In addition, the problem of wasting resources occurs.

The present invention provides a method for operating a mobile communication network for one generation so that generations can interoperate with other mobile communication networks at the same time when there is an area where mobile generation networks with different generations operate simultaneously and an area where only 2G networks operate. The purpose is.

Specifically, a generation that enables the generation of mobile communication networks to efficiently perform system determination, location registration, handoff in standby state, voice call and data call generation and handoff according to protocol revision of the terminal. Aims to provide another mobile communication network operation method.

In still another aspect, the present invention provides a method for determining a second generation or third generation system, a location registration method of a terminal, and handoff in a standby state to efficiently operate two mobile communication networks having different functions and network environments. In addition, by providing a voice call generation and termination, handoff, and data call processing method, one generation provides another mobile communication network operation method to efficiently use resources.

1 is a flowchart illustrating a system determination method in a mobile communication network operating method according to another embodiment of the present invention.

2 is a flowchart illustrating a registration method in a mobile communication network operating method according to another embodiment of the present invention.

3 is a flowchart illustrating a voice call generation process in a mobile communication network operating method according to another embodiment of the present invention.

Figure 4 (a) (b) (c) is a view showing a handoff processing procedure for each specific situation in the mobile communication network operating method according to the present invention different generations.

Mobile communication network operation method different generation according to the present invention for the above object,

In a method of operating a mobile communication system provided by networks having different generations and geographically distributed generations, the terminal may be configured in a region in which only a specific generation of networks exist and in a region in which a plurality of different generations of networks exist simultaneously. Performing system determination, registration, handoff between different networks, and various voice and data call processing services according to the protocol revision;

When performing a specific service, managing the resource information for the different generations of the network, when the terminal of the lower generation to access the network of the higher generation, limiting the service range for the terminal of the lower generation, and the terminal of the higher generation It is characterized in that it comprises the steps of performing the service and access to the service through the higher generation network when accessing the network.

Preferably, the system determination step according to the protocol revision of the terminal,

Searching for a higher generation system if the terminal is a higher generation terminal, transitioning to a standby state if system acquisition is successful, and searching for a lower system if system acquisition fails; If the terminal is a lower generation terminal, after searching for the lower generation system, if the system acquisition is successful, the process transitions to the standby state, and if the system acquisition fails, it characterized in that it comprises the step of obtaining a second generation system at the secondary frequency.

Preferably, the primary channel of the terminal of the lower generation is set to the frequency resources of the subsystem, and the secondary channel is set to a frequency resource other than the primary of the subsystem, characterized in that the fryer of the terminal of the higher generation The head channel is set as the frequency resource of the higher generation system, and the secondary channel is set as the frequency resource of the lower system.

Preferably, the registration step of the terminal according to the protocol revision, the step of registering all the terminals using the sub-system when only the sub-system exists; If the lower and upper systems are overlapping regions, the step of the upper generation terminal attempts to register to the lower generation system having an area identifier different from the surrounding lower generation system, and the presence or absence of the third generation system in the second generation system If the third generation system exists, the second generation system transmits an SRM message to the third generation terminal to perform registration with the third generation system, and if the third generation system does not exist, performing registration with the second generation system. Characterized in that.

Preferably, the SRM message includes a higher generation system identifier and a network identifier value and frequency resources of the higher generation system.

Preferably, the handoff step in the standby state of the terminal, in the case where only the lower generation system exists, the lower and higher generation terminal performs the standby handoff using only the lower generation system, the higher generation terminal is lower When a region in which a higher generation system exists by moving from a system of generation appears, area-based registration is performed to a corresponding lower generation system, so that an SRM message is transmitted from a lower system to a terminal to receive a service of a higher system.

Preferably, each system in an area where two networks of different generations exist simultaneously maintains PLD information indicating whether there is a different generation system, so that the lower system has a system identifier, a network identifier, and a frequency resource for the higher generation system. And the upper system includes the PN offset and frequency information for the lower system surrounding the overlapped area in the neighbor list.

Preferably, according to the protocol revision, the voice call processing step of the terminal may include: in the case of a lower generation terminal, attempting an outgoing call to a lower generation system and proceeding with a call from the lower system if the lower generation system accepts the call; If the lower generation system does not accept the outgoing call, the lower generation system checks whether the higher generation system exists in the region, and if the lower generation system exists, the lower generation system transmits an SRM to the terminal to the higher generation system. Attempting an outgoing call; And attempting to make an outgoing call to the higher generation system, checking whether the voice generation rate allocated to the second generation terminal in the higher generation system has been exceeded, and determining whether to accept the outgoing call.

Preferably, in the voice call processing step of the terminal according to the protocol revision, if the higher generation terminal attempts to make an outgoing call to the higher generation system, after confirming whether the upper generation system accepts the call, and proceeds to the higher generation system Doing; If the higher generation system does not accept the higher generation terminal, transmitting an SRM to the terminal to attempt a call to the lower generation system, and determining whether to set up an outgoing call according to whether the lower generation system accepts the call. It features.

Preferably, in the data call acceptance step of the terminal according to the protocol revision, the lower generation terminal attempts an MDR using only the lower generation system, uses a data service, and the higher generation terminal is located in an area where only the higher generation system exists. And performing HDR using a third generation system.

Preferably, in the handoff processing step, when the voice call and the data call of the lower generation terminal are handed off, the handoff is performed while performing voice and data services using only the lower generation system, and the voice call is transmitted to the third generation system. In the case of using the 3G system, the handoff is continuously performed to a lower generation system in a region where there is no upper generation system.

Preferably, when handing off / receiving a voice call of the higher generation terminal, when the incoming / outgoing call is attempted using the lower generation system, the handoff is performed continuously using the lower generation system, and the incoming call is performed using the higher generation system. In the case where the call origination occurs, if the region where the upper generation system exists, the mobile station moves using the upper generation system, and when the region includes only the lower generation system, handoff is performed using only the lower generation system.

Preferably, the handoff of the higher generation terminal for the data call, in the region where only the lower generation system exists, attempts an MDR call and then maintains the MDR call while handing off using the lower generation system, and the higher generation system exists. In the region, when attempting to move to an existing region where only the lower generation system exists after attempting an HDR call, a radio configuration hard handoff is performed to proceed to the MDR call.

Hereinafter, another mobile communication network operation method between generations will be described with reference to the accompanying drawings.

The present invention will be largely configured as an embodiment with respect to six operations as follows.

[1] System Determination is to determine which system (2G or 3G network) the terminal will use, in an area where only 2nd generation networks exist or where 2nd and 3rd generation networks exist simultaneously. A method of determining a system to be used according to a protocol revision of a terminal is presented.

[2] Registration is essential to set up an incoming call through accurate paging, in order to determine the system to be used by the terminal and to perform registration, the region where only the second generation network exists and the third generation network We present the registration method according to the protocol revision in the area where the network exists at the same time.

[3] Idle Handoff is an area in which only a second generation network exists according to the protocol revision of a terminal for standby handoff between different networks when the terminal transitions to an idle state. This paper presents a method to determine the system (2G System / 3G System) to be used when moving continuously in the standby state where the generation network and the generation 3 network exist simultaneously.

[4] Voice Call Processing is an area where only 2nd generation networks exist and 2nd generation for voice call processing of terminals in areas where 2nd generation networks and 3rd generation networks overlap. We present a method that is applied to the system selection depending on whether or not to allow the protocol revision and the initial call origination system in the region where both network and 3G network exist at the same time.

[5] Data call processing is used in the area where only 2nd generation network exists and the 2nd and 3rd generation networks exist simultaneously for data call processing of terminal in each mobile communication network. A method for data call processing according to a terminal protocol revision is presented.

[6] Handoff or Handover is an area in which only a 2nd generation system exists in a terminal performing a voice call or a data call, and a 2nd generation system and a 3rd generation system exist simultaneously. Provides a method for handoff of the call as it continues to move through the area.

Hereinafter, exemplary embodiments will be described with reference to the accompanying drawings.

[1] A system determination method will be described below.

First, in order to determine the system, the 2nd generation terminal (Mobile Protocol Revision '5' or less) sets a primary channel (Primary Cdma channel) as the first frequency resource (0 FA: Frequency Assignment) of the 2nd generation system. If the second generation terminal does not find the primary channel, the secondary channel (Secondary Cdma channel) is set to a frequency resource (FA) other than the primary of the second generation system.

The third generation terminal (Mobile Protocol Revision '6' or more) sets the primary channel as the first frequency resource of the third generation system. If the primary channel is not found, the secondary channel is set as the first frequency resource of the second generation system.

As described above, when the frequency resource is set, the second generation terminal is generated by the second protocol according to the terminal protocol revision for all system decisions, such as when the terminal attempts to terminate the call as well as when the terminal is powered on. When the system is selected, the third generation terminal selects the second generation system in the region where only the second generation system exists, and the third generation system in the region where the third generation system exists.

1 is a flowchart illustrating a system determination method in a mobile communication network operating method of different generations according to the present invention.

Referring to FIG. 1, the system determination of the terminal determines whether the terminal corresponds to the second generation or the third generation terminal (S101), and if it is the third generation terminal, determines whether to acquire the system by searching for the third generation system. (S102, S103). If the 3rd generation terminal succeeds in obtaining the 3rd generation system, the corresponding terminal transitions to the standby state (S015), and if the 3rd generation terminal fails to acquire the 3rd generation system, the 2nd generation system is searched for (S104).

When the second generation terminal is confirmed as a result of the step S101, the second generation system is searched (S106), and it is determined whether the second generation system is acquired (S107). If the second generation system acquisition is successful, the corresponding UE transitions to the standby state (S105), and if the second generation system attempts to acquire the second generation system at the secondary frequency.

Meanwhile, the location registration method of the terminal is as follows.

First, registration must be made when the terminal moves between systems to stay in the standby state. In order to allow the UE to perform registration when moving between systems, the configuration of zone ID and service redirection message (SRM) messages are used.

(A) In the standby state, the registration of the location of all terminals is performed by using the second generation system in the region (general matter) where only the second generation system exists.

In the region where the 2nd and 3rd generation systems exist at the same time, since the 2nd and 3rd generation systems overlap, the area is set to a different zone identifier (Zone ID) from the area where only the surrounding 2nd generation systems exist. do. In this case, all terminals perform zone base registration when they enter a duplicate area. At this time, the third generation terminal (that is, the terminal moving from the 2G region) is also registered using the second generation system. The 2nd generation system maintains PLD information indicating whether there is a 3rd generation system in the region, but if it is determined that the 3rd generation system exists, the service redirection message (SRM) is generated when the 3rd generation terminal registers. The 3G terminal is newly registered (Redirection) by the 3G system.

At this time, the service redirection message (SRM) should include the system and network identifier (SID: System ID, NID: Network ID) values of the 3rd generation system and the first frequency resource of the 3rd generation system. The third generation terminal receiving the SRM message acquires the third generation system and registers through the third generation system.

(B) It is assumed that when the terminal transitions from the control on the traffic channel state to the standby state, all the terminals can be assigned a traffic channel through the second generation system or the third generation system. (See Voice call.)

If, in the region where only the second generation system exists, all terminals are registered through the second generation system, and when the terminal is assigned a traffic channel through a system other than the system that has previously registered by service redirection, Since channel registration is performed, it is possible to receive a message (SMS, Broadcast Message) in the traffic state.

In addition, when the terminal receives the traffic channel by the SRM message and then transitions to the standby state, the zone-based registration is performed after the terminal transitions to the standby state by setting a zone ID differently between the 3rd generation system and the 2nd generation system. (Zone Base Registration).

2 is an exemplary embodiment according to the present invention, in which a terminal moves in an area where only a second generation system exists and shows a registration relationship in a second generation / 3 generation overlapping area.

First, after confirming whether it is a 2nd generation terminal or a 3rd generation terminal (S111), if it is a 3rd generation terminal, it tries to register with a 2nd generation system (S112). It is possible to attempt registration with the second generation system because the different area and area identifiers are set differently.

When attempting registration with the second generation system, after confirming the existence of the third generation system in the second generation system through the PLD (S113), if there is a third generation system, the second generation system transmits an SRM message to the terminal to the third generation system. The third generation terminal to perform registration (S114, S115).

However, if the third generation system does not exist in the second generation system, registration is performed as the second generation system (S113, S116).

The second generation terminal registers with the second generation system (S117). Here, different region and region identifiers are set differently.

On the other hand, the handoff in the standby state is as follows.

Handoff in standby is handled by redirection in areas where 2nd and 3rd generation systems coexist. At this time, the second generation terminal continuously performs the standby handoff using the second generation system. When the 3G terminal moves using the 2G system in the area where only the 2G system exists, and the 3G system appears, the 3G terminal performs Zone Base Registration with the 2G system. If it is determined that the region of the third generation system exists, the SRM message is transmitted to the terminal to select the third generation system. On the contrary, when moving from the 3rd generation system to the area where only the 2nd generation system exists, the 3rd generation system naturally includes the PN offset and frequency information of the neighboring 2nd generation system in the neighbor channel information of the overhead channel. Move to the system.

In this case, a terminal that cannot search for pilots of other frequencies may use the third generation system until the paging channel of the third generation system is lost, and then transition to the system decision substate to select the second generation system.

Meanwhile, the voice call processing method will be described below.

For voice call processing, the second generation terminal basically generates and generates a page response using the second generation system. If the call is rejected from the 2nd generation system (for example, lack of Modem resources or power), refer to PLD (Program Loading Data) information indicating whether the 3rd generation system exists in the area, and then, if the 3rd generation system exists, The SRM message is transmitted to the terminal to process the voice call using the third generation system. When a voice call of a 2nd generation terminal is attempted as a 3rd generation system because a voice call of a 2nd generation terminal is rejected in a 2nd generation system, a 2nd generation for each sector / frequency resource (Sector / FA) of PLD information in a 3rd generation system Check the voice call acceptance rate of the terminal and allow the voice call of the second generation terminal only within the ratio. In this way, the resources of the 3rd generation system are prevented from being excessively occupied by the 2nd generation terminal, thereby ensuring that data call processing is smoothly performed in the 3rd generation system.

To this end, in the 3rd generation system, the voice call acceptance rate by the 2nd generation terminal for each sector / FA must be managed by the PLD, and the system operator must set an appropriate value.

The third generation terminal attempts to generate a call / page response using the third generation system where the third generation system is located. In the 3rd generation system where the call is rejected due to the lack of resources of the 3rd generation system, after confirming the attempted service option, if the call is not an HDR call, a SRM (Service Redirection Message) is transmitted to the terminal to attempt the call using the 2nd generation system.

In particular, in the case of an incoming call, the HLR of the 2nd generation system and the 3rd generation system must operate in an integrated operation or the HLR of each system. Paging should be appropriately performed for all terminals by sharing registration information on which system the terminal is operating in a standby state or a traffic state.

Referring to Figure 3 will be described with respect to the voice call processing method in the second generation system and the third generation system overlap region.

After confirming whether it is a second generation terminal or a third generation terminal (S121), if the third generation terminal attempts to call the third generation system (origination) (S122), the third generation system determines whether the call is accepted (S123), If accepted, the third generation system proceeds with the call (S123a), and if the third generation system does not accept the call, the third generation system transmits the SRM to the terminal to attempt the call to the second generation system (S124). Thereafter, if the call is accepted after the 3rd generation terminal attempts the call to the 2nd generation system, the call is set up to the 2nd generation system (S125 and S126). If the call is not accepted, the call connection fails (S125a). In this case, the SRM transmitted to the UE by the 3rd generation system includes NID, SID, and FA information of the overlapping region 2G system.

Then, the second generation terminal attempts to call the second generation system (S127), and after confirming that the call is accepted (S128), if the call is accepted, proceeds with the call in the second generation system (S128a), if the call is not accepted, the third generation system After checking whether the region exists, if the third generation system does not exist in the call fails (S129a), if the third generation system exists in the second generation system transmits the SRM to the second generation terminal 3 Attempt to make an outgoing call to the generation system (S130). At this time, the third generation system checks whether the second generation voice call acceptance rate is exceeded in the third generation system (S131), and if it exceeds, fails to process the call (S131a), and if not, sets up the call to the third generation system. It proceeds (S132). In this case, the SRM transmitted to the terminal includes a system identifier (SID), a network identifier (NID) value of the third generation system, and a first frequency resource of the third generation system.

On the other hand, the data call acceptance method will be described as follows.

In order to accommodate the data call, the second generation terminal may attempt a MDR (Mid Data Rate) call using the second generation system. Even if the MDR call is attempted and the second generation system is not allowed due to lack of resources, and there is a third generation system in the area, the terminal is not redirected. This is to smooth the HDR call performance of the third generation system by limiting the excessive third generation system resource occupancy by the second generation terminal.

The 3G terminal cannot perform HDR in the region where the 3G system does not exist, and performs the HDR call using the 3G system in the region where the 3G system exists.

Meanwhile, the handoff method will be described below.

When the second generation terminal is a voice call, the second generation system attempts to make an incoming / outgoing call and performs a handoff using the second generation system. However, when calling using the 3G system, the 3G system moves to the 3G system in the region where the 3G system exists, and then moves to the 2G system when moving to the 3G system.

And, in case of data call, handoff while performing MDR using only 2nd generation system.

In addition, when the third generation terminal makes an incoming / outgoing call using the first second generation system during a voice call, the third generation terminal continuously performs handoff using only the second generation system.

When the call is made / received using the 3rd generation system, if the 3rd generation system exists, move to the 3rd generation system. do. That is, if a handoff occurs to the second generation system once, the second generation system continues to be handed off. In particular, when handoff from 3rd generation system to 2nd generation system, inter generation handoff occurs between systems with different generations, so conversion process is needed due to the difference of network configuration. .

In addition, the Data Call attempts an MDR (Mid Data Rate) call in an area where only the second generation system exists, and then maintains the MDR call while handoff using the second generation system.

In areas where third-generation systems exist, HDR (High Data Rate) calls are attempted. When moving to the area where the 3rd generation system exists, it maintains the HDR call. When moving to the area where only the 2nd generation system exists, the RC (Radio Configuration) hard handoff is performed to proceed to the MDR call.

A handoff will be described with reference to FIG. 4.

4 (a) is a case where a 3rd generation terminal attempts to make / call from a 3rd generation system. First, when a 3rd generation system attempts to make / call with a 3rd generation system in a region where a 2/3 generation system exists at the same time, a 2/3 generation system At the same time, handoff is performed using the 3G system even when moving to another area (S141, S142), and handoff is performed using the 2G system when moving to an area where only the 2G system exists (S143). ). Thereafter, even if the 2/3 generation system moves to a complex area where the 2/3 generation system exists at the same time, the handoff is performed using the 2nd generation system.

In addition, FIG. 4B illustrates a case in which a 3G terminal transmits a data call in a 3G system and receives a 3G system and a high speed data service (HDR) in an area where a 2/3 generation system exists at the same time. (S151), when moving to an area where only the second generation system exists, perform a wireless environment hard handoff (RC hard handoff) (S152), and receive a service by an intermediate data service (MDR) call, and then 2/3 generations Even if the system moves to an existing region, handoff is performed using the second generation system (S153).

3 (c) is a case where the second generation terminal is calling a voice / data call from the second generation system, and the second generation terminal performs the handoff using the second generation system in a region where the 2/3 generation system exists at the same time. In operation S161, when the mobile terminal moves to an area where only the second generation system exists or moves to an area where the second / third generation system exists again, handoff is performed using the second generation system (S162 and S163).

As such, as a new mobile communication technology is developed and a mobile communication network evolves, an efficient operation method between an existing mobile communication network and a newly installed mobile communication network is provided. Currently, mobile communication networks supporting IS-95A / B Spec. Have been installed and operated all over the country. Double-wired, recently, mobile communication networks supporting Spec. Of CDMA2000-1x and CDMA2000-1x Ev-DO have been commercialized and operated. In the beginning, the new network forms a cluster and gradually expands the scope of the new network because operators cannot install the nationwide network at the time of installing a new network. This paper presents an efficient operation method through sharing between mobile communication networks.

As described above, according to the method of operating a mobile communication network having different generations according to the present invention, a higher level for efficient service to upper or lower terminals in an area in which only a second generation network is installed and an area in which a 2/3 generation network exists simultaneously. Efficient operation through sharing of resources between existing lower generation network and newly installed upper generation network by enabling efficient resource management between each other and lower generation systems, and supporting services by double-er, upper generation and lower generation networks or systems interworking. Through this, there is an effect that can enable a smooth service provision and efficient use of resources.

Claims (14)

In a network operation method of a mobile communication system provided by a terminal having a different generation and a network having a geographically distributed generation, In areas where only a certain generation of networks exist, and where multiple networks of different generations exist simultaneously, system determination, registration, handoff between different networks, and various voice and data call processing services to be used according to protocol revision of the terminal are performed. Performing; When performing a specific service, managing the resource information for the different generations of the network, when the terminal of the lower generation to access the network of the higher generation, limiting the service range for the terminal of the lower generation, and the terminal of the higher generation And a method of inducing a service to be received through a higher generation network when accessing a terminal of the mobile generation network. The method of claim 1, The system determination step according to the protocol revision of the terminal, Searching for a higher generation system if the terminal is a higher generation terminal, transitioning to a standby state if system acquisition is successful, and searching for a lower system if system acquisition fails; If the terminal is a lower generation terminal, search for the lower generation system, and if the system acquisition is successful, transition to the standby state; and if the system acquisition fails, performing the generation of the lower generation system with a secondary frequency. Different mobile network operations. The method of claim 2, And setting the primary channel of the terminal of the lower generation as a frequency resource of the sub system, and setting the secondary channel to a frequency resource other than the primary of the sub system. And operating the primary channel of the terminal of the higher generation as the frequency resource of the higher generation system and the secondary channel as the frequency resource of the lower system. The method of claim 1, The registration step of the terminal according to the protocol revision, Registering all the terminals using the sub-system in a region where only the sub-system exists; If the lower and upper systems are overlapping regions, the step of the upper generation terminal attempts to register to the lower generation system having an area identifier different from the surrounding lower generation system, and the presence or absence of the third generation system in the second generation system If the third generation system exists, the second generation system transmits an SRM message to the terminal to perform registration with the third generation system, and if the third generation system does not exist, including registering with the second generation system. Mobile communication network operation method characterized by different generations. The method of claim 4, wherein And wherein the SRM message includes a higher generation system identifier, a network identifier value, and a frequency resource of the higher generation system. The method of claim 1, The handoff step in the standby state of the terminal, In the region where only the lower generation system exists, the lower and higher generation terminals perform standby handoff using only the lower generation system. When the higher generation terminal moves from the lower generation system and the region where the higher generation system exists, the area based registration is performed with the lower generation system to perform the idle handoff by SRM, and the second generation in the redundant region of the 2/3 generation system. The method of operating a mobile network according to another generation, characterized in that the idle handoff is performed by including the frequency of the second generation system around the duplicate area in the neighbor list among the overhead messages of the third generation system when the system moves to the region where only the system exists. The method according to claim 4 or 6, The second generation system in the region where two generations / three generations are overlapped maintains PLD information indicating whether there is a third generation system, and the second generation system has system identifier, network identifier and frequency resource information for the third generation system. And, wherein the third generation system includes the PN offset and frequency information for the second generation system around the overlapping region in the neighbor list message of the overhead message. The method of claim 1, According to the protocol revision, the voice call processing step of the terminal is In the case of a lower generation terminal, attempting to make an outgoing call to a lower generation system, and if the lower generation system accepts the call, proceeding with the lower system; If the lower generation system does not accept the outgoing call, the lower generation system checks whether the higher generation system exists in the region, and if the lower generation system exists, the lower generation system transmits an SRM to the terminal to the higher generation system. Attempting an outgoing call; And attempting to make the outgoing call to the higher generation system, determining whether the upper generation system has exceeded the voice acceptance rate allocated to the second generation terminal, and then determining whether to accept the outgoing call. How to operate a network. The method of claim 1, The voice call processing step of the terminal according to the protocol revision When the higher generation terminal attempts to make an outgoing call to the higher generation system, confirming whether the higher generation system accepts the call; If the higher generation system does not accept the higher generation terminal, transmitting an SRM to the terminal to attempt a call to the lower generation system, and determining whether to set up an outgoing call according to whether the lower generation system accepts the call. Mobile communication network operation method characterized by different generations. The method of claim 1, The data call receiving step of the terminal according to the protocol revision includes; The lower generation terminal attempts an MDR using only the lower generation system to use a data service, And a step in which the higher generation terminal performs the HDR using the third generation system in the region where the higher generation system exists. The method of claim 1, The handoff processing step is When handing off voice and data calls of a lower generation terminal, the handoff is performed while performing voice and data service using only the lower generation system, and when the voice call is sent to the third generation system, the handset is moved using the third generation system. A method of operating a mobile network according to another generation, characterized in that the handoff is continuously performed to a lower generation system in a region where no later generation system exists. The method of claim 11, When handing off a voice call of the higher generation terminal, when an incoming / outgoing call is attempted using a lower generation system, handoff is performed using the lower generation system continuously, and an incoming / outgoing call is performed using the higher generation system. In case of an area where a higher generation system exists, the mobile unit moves by using the higher generation system, and when the lower generation system exists, a handoff is performed using only the lower generation system. How to operate a network. The method of claim 1, The handoff of the higher generation terminal to the data call is In the region where only the lower generation system exists, the MDR call is attempted and then handoff is performed using the lower generation system to maintain the MDR call. A method for operating a mobile network according to another generation, characterized in that when performing an MDR call by performing a hard handoff in a wireless environment when moving to an area. A first step of the N-th generation terminal processing discovery, registration, and call generation of a corresponding N-th generation system; A second step of the N + 1th generation terminal processing discovery, registration, and call generation of the corresponding N + 1th generation system; When an abnormal situation occurs in the first and second stages, the Nth generation terminal searches for, registers, and calls the system through the N + 1th generation system and the N + 1th generation system through the N + 1th generation system. Generation generation different mobile communication network operating method comprising the step of attempting generation.