JP3518496B2 - Mobile communication service system and method of providing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication service system and a method of providing the same, and particularly to 3GPP (3r
d Generation Partnership
Current IMT-20 being considered by Project)
00 (International Mobile T
elecommunications 2000) specification for communication services.

[0002]

2. Description of the Related Art In services that use radio such as mobile phones (voice services, packet data transfer services, etc.), services that can be used by user terminals (mobile phones, etc.) existing in a certain cell are mainly user terminals. Depends on the capabilities of the network controlling the cell in which it exists and the radio capacity of that cell.

In a network for a next-generation mobile communication service such as IMT-2000, as shown in FIG. 15, a core network (CN) 5 including exchanges and the like,
Radio management network (RN) consisting of radio base station controllers
C + Node B) 6-1 and 6-2, and base stations 7-1 to 7-4 including antennas.

In the above mobile communication service network, cells a1 to a4 managed by the base stations 7-1 to 7-4 are in contact with each other in order to secure the communication service to the moving user terminal 8. , Many base stations 7-1
~ 7-4 are installed to form a communication area, and the user terminal 8
The system is configured to provide communication services wherever you are.

Each of the base stations 7-1 to 7-4 has an antenna for communicating with the user terminal 8 and communicates with the user terminal 8. Some base stations 7-1 to 7-4 are wire-connected to the wireless management networks 6-1 and 6-2. The radio management networks 6-1 and 6-2 perform control necessary for each user terminal to connect to each base station 7-1 to 7-4 and receive communication service, and manage control information.

Several wireless management networks 6-1,
6-2 is connected to the core network 5 by wire. The core network 5 is formed by connecting a number of exchanges by wire and provides network communication services. For the wired connection here, in addition to the connection with a metal cable,
A configuration using an optical signal transmission system using an optical fiber or a configuration using a specific microwave circuit or the like is also included. The wireless management network 6-1 may be connected to another wireless management network 6-2 by wire.

Now, the user terminal 8 is in the cell a2,
It is assumed that the mobile station moves while communicating with the base station 7-2 (hereinafter referred to as connection). Gradually approaching the boundary of cell a2,
As it moves into the adjacent cell (for example, the cell a1), the signal reception strength from the base station 7-2 to which the user terminal 8 is connected gradually decreases, and the base station 7 of the adjacent cell a1 The signal reception intensity from -1 gradually increases.

In such a case, the user terminal 8 using the common channel receives a signal reception strength from the base station 7-1 of the adjacent cell a1 at a certain time, for example, from the currently connected base station 7-2. When it becomes higher than the signal reception strength to some extent, a signal is transmitted to the radio management network via the base station 7-1 and the connection to the adjacent base station 7-1 is changed.

When the user terminal 8 uses the dedicated channel, the radio management network 6-1 receives the measurement report from the user terminal 8 via the base station 7-2, and the cell a
1 may add a new connection via the base station 7-1 or disconnect the connection of the cell a2. This is an operation related to radio, not addition or deletion of services.

This operation is called handover. At this time,
There are roughly two types of handovers in the relationship between the base station 7-2 and the base station 7-1. That is, both the base station 7-2 and the base station 7-1 have the same radio management network 6
-1, the base station 7-2 and the base station 7-3 are connected to different radio management networks 6-1 and 6-2, respectively, as shown in FIGS. 16 and 17. There are some cases.

When the user terminal 8 hands over, it is necessary to provide and maintain the same service to the user terminal 8 before and after the handover. In addition, when the handover is performed, the radio management network may be transferred. In FIGS. 16 and 17, the wireless management network for managing the user terminal 8 is referred to as the wireless management network 6-1
To the wireless management network 6-2. This is called relocation.

In the former case, since both base stations 7-1 and 7-2 are under the control of the same radio management network 6-1 before and after the handover, it is necessary to continuously maintain the service provided before and after the handover. Inheritance of various control information can be processed within the same wireless management network 6-1.

On the other hand, in the latter case, since the base stations 7-2 and 7-3 to which the user terminal 8 is connected are connected to different radio management networks 6-1 and 6-2 before and after the handover, the user terminal 8 is connected. In order to continuously maintain the service provided to the base station 7-2 after the handover, the radio management network 6 of the base station 7-2 connected before the handover is
The control information managed by -1 will be transferred to the radio management network 6-2 of the base station 7-3 to be connected after the handover.

In this case, the relocation is performed by the user terminal 8
In addition to being executed when a signal is transmitted from the device, it may be activated in the wireless management network 6-1. User terminal 8
When the user terminal 8 is using the common channel, the signal transmission from the base station 7-
3, when the user terminal 8 recognizes that the received signal strength from the base station 7-2 has become stronger, the user terminal 8 sends a signal to the base station 7-3 and receives the base station 7-3. 3 sends a signal to the radio management network 6-2. Further, the radio management network 6-2 sends a signal to the radio management network 6-1 to start relocation.

When activated in the radio management network 6-1, it occurs when the user terminal 8 is using the dedicated channel, and the radio management network 6-1 receives each cell reported from the user terminal 8. By referring to the signal strength information, for example, a user terminal connected to a cell whose line availability is extremely low (that is, crowded) is in the vicinity of a boundary area with another adjacent cell (that is, an adjacent cell). The signal reception strength from the base station is sufficiently high) is controlled to change the connection to the base station of the adjacent cell.

When the user terminal 8 is handed over as it moves, there may be a difference in the availability of communication lines before and after the handover. Specifically, there are many user terminals in a cell around a station in an urban area and the line utilization rate is high, but an adjacent cell has a relatively low line utilization rate.

There may be a difference in the types of services that can be provided to the user terminal between the cell before the handover and the cell after the handover. Specifically, there is an example in which the initial service providing area of the data communication service, whose service providing area is expanding, is limited to the central Yamanote Line of Tokyo. In such a case, if the user terminal moves from within the Yamanote line to another area, it becomes impossible to receive the data communication service due to the movement.

As described above, the availability of the line or the content of the service that can be provided is different before and after the movement.
When it becomes impossible to continuously maintain the service that can be provided to the user terminal, priorities are set in advance for each of several services that are conventionally provided to the user terminal, and the priority order is set according to the conditions before and after moving. It is considered to perform control such as sequentially disconnecting or holding from low service.

3GP currently under study for standardization
P (3rd GenerationPartnersh
The specification of the prioritization of services defined in the ip Project network will be briefly described below.

Here, in the specification of service prioritization, "3G TS 25,413 v3.2.0" is specified.
UTRAN Iu Interface RANAP
"RA" in Chapter 9.2.1.3 of "Signalling"
Allocation / in B Parameters
Retention Priority is included, and this Allocation / Retention Priority is included.
originity is used to prioritize individual services. Allocation / Retention
The priority is assigned by the core network, but how to assign it is not specified.

Now, it is assumed that there are five types of services that can be provided to user terminals in a certain cell, as shown in FIG. As an example, service # 1 is a video signal of movie A, service # 2 is an English audio signal of movie A, service # 3 is a Japanese audio signal of movie A, service # 4 is an audio signal of radio broadcast B, service # 5. Is a voice call service.

Each of the services # 1 to # 5 is required to have a predetermined data transfer rate (line information transmission capacity) for transmitting each signal, and each service can be arbitrarily received by the operation of the user terminal. That is, it can be received arbitrarily.

The user of the user terminal checks the guidance of the provided services, and in this case, for example, if it is assumed that the movie A is viewed in Japanese voice from the list of the provided services,
The user operates the user terminal to select service # 1 and service # 3 for viewing. At this time, the user terminal sets priorities in the order of service # 1 and service # 3. Also, when a telephone call using the service # 5 is made to the same user terminal while watching the movie A, if there is sufficient free space in the communication line with the base station, as described above, Even if the service # 5 is set to have the lowest priority, the user terminal can receive it.

When this user terminal moves to the adjacent cell, if the available capacity of the communication line in the base station after the handover is not sufficient, the voice call of service # 5 having the lowest priority is held or disconnected. Nevertheless, if the free capacity of the communication line is not sufficient, the Japanese audio signal of movie A of service # 3 is held or disconnected.

The remaining video signal of the movie A of the service # 1 is continuously maintained as long as it is within the free communication line capacity of the base station after the handover, and the user terminal after the handover uses only the video signal of the movie A of the service # 1. can do.

[0026]

According to the current specifications described above, at the time of a handover accompanying the movement of a user terminal, the type of service that can be provided at the base station after the handover, or the data that can be provided. If the transmission capacity is less than that of the base station before the handover, the services that cannot be provided will be suspended or disconnected in order according to the preset priority order, and the services that can be provided before the handover can be provided. Only will be maintained continuously.

However, the service transfer control according to this priority order is not always beneficial for the user of the user terminal. That is, in the above case, from the viewpoint of the user of the user terminal, of the various services used before the handover, only the video signal of the movie A being watched can be used after the handover. And the voice call is put on hold or disconnected.

For the purpose of viewing the movie A, the Japanese voice of the service # 3 cannot be viewed and the content of the service continuously maintained by the handover is meaningless for the user of the user terminal. I don't get it.
In addition, when it is difficult to watch the movie A in a satisfactory state, the user of the user terminal can make a voice call that can be serviced with a smaller data transmission capacity than when viewing only the video signal of the movie A. (Service # 5 above)
Sometimes you just want to keep it up.

That is, in the conventional handover control, there is a problem that the priority control for taking over various services cannot provide a sufficient function for the request of the user of the user terminal.

Therefore, an object of the present invention is to solve the above-mentioned problems and to meet the demands of the user of the user terminal while complying with the prioritization specifications of various services currently defined in the handover control of the user terminal. It is intended to realize a mobile communication service system and a method of providing the same, which can provide a matching handover control function.

[0031]

A mobile communication service system according to the present invention is connected to a base station that communicates with a moving user terminal, a radio management network that manages the base station, and a radio management network. A mobile communication service system comprising a core network including an exchange, and a management table storing a combination of services available in the user terminal and a priority order of the combination, the wireless management network and the core. The network and the user terminal are respectively provided, and the wireless management network, the core network, and the user terminal are configured to recognize the combination of the services and the priority order of the combination, based on the management table. I have to.

A mobile communication service providing method according to the present invention includes a base station for communicating with a moving user terminal, a radio management network for managing the base station, and a switching center connected to the radio management network. A mobile communication service providing method for a system including a core network, the combination of services provided in the wireless management network, the core network, and the user terminal, respectively, and the combination thereof. Based on a management table storing the priority order of the above, the combination of the services and the priority order of the combination are mutually recognized among the wireless management network, the core network and the user terminal.

That is, the combination of services available to a certain user terminal and the priority of these combinations are defined while complying with the current 3GPP specifications. The contents of this definition are mutually recognized between the user terminal and the core network using the call control and session management protocols.

In order to mutually recognize the contents of the definition between the radio management network and the core network, RANAP (Radio Access Network) is used.
rkApplication Part) protocol is used, and RNSAP is used between radio management networks.
(Radio Network SubsystemA
The protocol of the application part) is used.

By exchanging the contents of the above definition, it becomes possible for the three parties of the user terminal, the radio management network, and the core network to have a common recognition of the services available in a certain cell. It becomes possible to effectively use the wireless capacity and provide a flexible service.

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a mobile communication service system according to an embodiment of the present invention. Referring to FIG. 1, a mobile communication service system according to an embodiment of the present invention includes a core network (CN) 1 including exchanges and a radio management network (RNC + Node B) 2-1 and 2-2 including radio base station control stations. Two
And base stations 3-1 to 3-4 including antennas.

Here, the core network 1 and the radio management networks 2-1 and 2-2 are based on the specifications of the current 3GPP, and the combination of services available to the user terminal 4 and the priority of those combinations are given. There are provided priority management tables 1a, 2a-1 and 2a-2 which store definitions of ranks. Although not shown, the user terminal 4 also has a priority management table.

These priority management tables 1a, 2a-1 and 2a-2
The stored contents of a-2 are mutually recognized between the user terminal 4 and the core network 1 using the call control and session management protocols.

The contents stored in the core network 1
And RANAP (Radi
o Access Network Applicat
Ion Part) protocol is used, and RNSAP (Rad) is used between the radio management networks 2-1 and 2-2.
io Network Subsystem Appl
ication Part) protocol is used.

The above priority management tables 1a, 2a-1 and 2a
-2, by exchanging the stored contents, the user terminal 4, the radio management networks 2-1, 2-2, and the core network 1 share the common services available in the cells A1 to A4. It becomes possible to have the recognition, and it is possible to effectively use the wireless capacity and provide the service with flexibility.

FIG. 2 is a block diagram showing another configuration example of the mobile communication service system according to one embodiment of the present invention. 2, the configuration is the same as that of FIG. 1 except that the wireless management network 2-2 is directly connected to the wireless management network 2-1.

FIG. 3 is a diagram showing an example of stored contents of the priority management table 1a shown in FIG. In FIG. 3, priority management table 1
The combination of services # 1 to # 5 and their priority order are stored in a. Here, service # 1 is the video signal of movie A, service # 2 is the English audio signal of movie A, service # 3 is the Japanese audio signal of movie A, service # 4 is the audio signal of radio broadcast B, service # 5 Is a voice call service.

In FIG. 3, a combination of service # 1 (video signal of movie A) and service # 3 (Japanese audio signal of movie A) is stored in priority # 1, and priority # 2 is stored.
Stores a combination of only service # 5 (voice call service).

FIG. 4 is a diagram showing another example of the stored contents of the priority management table 1a of FIG. In FIG. 4, the priority management table 1a stores combinations of services # 1 to # 5 and their priorities. Here, the contents of services # 1 to # 5 are the same as above.

In FIG. 4, a combination of only service # 5 (voice call service) is stored in priority # 1,
A combination of service # 1 (video signal of movie A) and service # 3 (Japanese audio signal of movie A) is stored in priority # 2.

FIG. 5 is a sequence chart showing a sequence when the user terminal 4 first starts the service in the embodiment of the present invention. FIG. 5 shows the sequence when the user terminal 4 receives an incoming call.
Here, it is assumed that the user terminal starts the service in the cell A2 under the control of the radio management network 2-1.

First, the core network 1 is a user terminal 4
Then, a connection setting request [SETUP (TI = i)] is issued with the service identifier (TI = i). User terminal 4
Responds to the setting request with the stream identifier (SI = y) corresponding to the service identifier (TI = i) [CALL C
ONFIRMED (TI = i) (SI = y)].

Here, the service identifier is used to identify each connection when one user terminal 4 has established a plurality of connections. Also, the stream identifier is the service # as shown in FIG. 3 or 4.
It is used to indicate the combination of 1 to # 5 and the priority order of those combinations.

Next, the core network 1 requests the radio management network 2-1 to make a radio access bearer setting request [RA
B (Radio Access Bearer) As
signal Request] is transmitted. This message contains the stream identifier SI.

User terminal 4 and radio management network 2-
RRC (RadioResource C
radio bearer (R
B) is set {RRC RB Setup (SI =
y)].

The radio management network 2-1 sends information about the set service to the radio access bearer setting response (RAB).
It is included in the Assignment Response and is notified to the core network 1.

FIG. 6 is a sequence chart showing a sequence when a new connection is added to the connection initially established by the user terminal 4 in the embodiment of the present invention.

In FIG. 6, the user terminal 4 makes a connection setting request to the core network 1 with a service identifier (TI = j) and a stream identifier (SI = {y, [i, j], [1,0]}). Execute [SETUP (TI = i, S
I = {y, [i, j], [1, 0]})].

Stream identifier (SI = {y, [i,
j], [1, 0]}) means that the connection with the service identifier i has a higher priority than the connection with the service identifier j. The subsequent procedure is the same as the sequence shown in FIG.

Further, when the user terminal 4 adds a new service, a connection is established in the same procedure as the sequence shown in FIG. 6, but the stream identifier SI
SI = {y, [i, j, k], [1,1,1], [1,
1, 0], [0, 0, 1]}. The service identifier to be added is T
Let I = k.

This is [i, j, k] = [1,1,1]
The combination of services has the highest priority, then [i,
This means that the priority of the combination of services of j, k] = [1,1,0] is high.

By setting the connection according to the above procedure, the user terminal 4 and the radio management network 2-
1. The three parties of the core network 1 can have a common recognition regarding the priority of the connection and the currently set connection. These pieces of information are stored in the priority management tables 1a and 2a-1 of the core network 1, the wireless management network 2-1, and the user terminal 4, respectively.

FIG. 7 shows a service available when the user terminal 4 moves to a cell in which the service that can be provided is restricted in one embodiment of the present invention [i, j, k] = [1,0,0].
4 is a sequence chart showing a procedure for making a transition to the state of FIG. With reference to FIG. 7, the user terminal 4 selects [i, j,
k] = [1,1,1] moves from a state where the service is used to a cell where the service that can be provided is limited,
A case will be described in which the state of [i, j, k] = [0,0,1] is entered, and then the cell moves to a cell capable of providing the service of [i, j, k] = [1,1,0]. To do. The cells before and after the movement are the same in the radio management network 2-
It belongs to 1. Further, [i, j, k] corresponds to the content shown in FIG.

First, when the user terminal 4 moves to a cell in which the services that can be provided are limited and the available services make a transition to the state of [i, j, k] = [1, 0, 0]. Here are the steps:

Measurement report from the user terminal 4 (Measu
The radio management network 2-1 that has received the "Report Report" performs cell switching when the measurement report includes a cell having a received power higher than that of the cell in which the user terminal 4 is currently present, and the user terminal 4 is set to the highest. Control is shifted to a cell with high received power.

If the radio capacity of the cell at the movement destination is not sufficient, the radio management network 2-1 requests the radio access bearer improvement request [RAB Modification Re].
quest (SI = {y [i, j, k], [0,0,
1]})] is transmitted to the core network 1.

The core network 1 notifies the user terminal 4 of the service notified from the radio management network 2-1 [Resource Indication (SI
= {Y [i, j, k], [0,0,1]})]. The connection is re-established based on this information [RAB Se
tup (SI = {y [i, j, k], [0,0,
1]})], TI = i, TI = j services are suspended.

FIG. 8 shows the services [i, j, k] that can be used by moving from the cell in which the service that can be provided by the user terminal 4 is restricted to the cell in which the service restriction is relaxed in one embodiment of the present invention. ] = [1,1,0] is a sequence chart showing a procedure for making a transition. Referring to FIG. 8, the user terminal 4 sets [i, j, k] = [1, 1,
[0] will be described in the case of moving to a cell that can provide the service.

Since the radio management network 2-1 grasps the status of the service used by the user terminal 4 when setting the connection, [i, j, k] =
It can be seen that [1,1,0] is in a better state than the service currently used by the user terminal 4. At this time,
The user terminal 4 can use the service of [i, j, k] = [1,1,0].

In this case, the radio management network 2-1 requests the radio access bearer improvement [RAB Modify
Cation Request (SI = {y [i, j,
k], [1,1,0]})] to the core network 1 to request service improvement.

The core network 1 has [i, j, k] =
Stream identifier SI = {y, [i, j, k] = that the service of [1,1,0] can be used
Notify the user terminal 4 with [1,1,0]} [Reso
urce Indication (SI = {y [i,
j, k], [1,1,0]})].

The user terminal 4 uses the stream identifier SI =
The connection is reestablished using {y, [i, j, k] = [1,1,0]}. In this way, the user terminal 4
Can always use the best service in the existing cell.

Next, a case will be described in which all the services used before the relocation cannot be provided in the above-mentioned cell after the relocation. Here, the connection of [i, j, k] = [1,1,1] is established before the relocation, and the service such as [i, j, k] = [1,1,0] is provided after the relocation. Is limited.

The relocation triggers include the case where the relocation is executed immediately after receiving the measurement report from the user terminal 4, and the case where the relocation is not executed immediately after receiving the measurement report from the user terminal 4. When 2-1 detects the congestion of its own station, it performs relocation voluntarily, and when the user terminal 4 using the common channel moves the cell, the cell of the movement destination and the cell after the movement are wirelessly connected. The management networks 2-1 and 2-2 may be different.

FIG. 9 is a sequence chart showing a procedure for executing relocation immediately after receiving a measurement report from the user terminal 4 in the embodiment of the present invention. Referring to FIG. 9, the wireless management network 2-1 is used as a source wireless management network, and the wireless management network 2-
A procedure when 2 is the target wireless management network will be described.

The source radio management network 2-1 uses the measurement report (Measurement R) from the user terminal 4.
When receiving the e-port, the core network 1 is requested to relocate (Relocation Request).
Send d).

When the core network 1 receives the relocation request from the source radio management network 2-1,
A relocation request is transmitted to the target radio management network 2-2. This message contains information about the service received from the source radio management network 2-1. This causes relocation.

FIG. 10 is a diagram showing a state before relocation of the mobile communication service system according to the embodiment of the present invention, and FIG. 11 shows a state after relocation of the mobile communication service system according to the embodiment of the present invention. FIG. 12 is a diagram showing a case where relocation is performed when a radio management network is different between a source cell and a moved cell of a user terminal 4 using a common channel in one embodiment of the present invention. It is a sequence chart which shows a procedure. With reference to these FIGS. 10 to 12, the relocation when the radio management network of the source cell of the user terminal 4 and the cell after the movement of the user terminal 4 are different will be described. Also in this case, the wireless management network 2-1 is the source wireless management network, and the wireless management network 2-2 is the target wireless management network.

When the user terminal 4 using the common channel moves from the source cell A2 to the moved cell A3, it transmits a cell update to the target radio management network 2-2.

In this case, the user terminal 4 will send the cell update including the identification information of the source radio management network 2-1 to the target radio management network 2-2, and thus the target radio management network 2-2.
Notifies the source radio management network 2-1 that the user terminal 4 having the identification information of the source radio management network 2-1 is in the cell A3 of the subordinate base station 3-3 [UplinkSignaling Tran].
sfer Indication].

Upon receipt of the notification from the target radio management network 2-2, the source radio management network 2-1 requests the core network 1 for relocation (Rel).
Occurrence Required) is transmitted.

When the core network 1 receives the relocation request from the source radio management network 2-1,
A relocation request is transmitted to the target radio management network 2-2. This message contains information about the service received from the source radio management network 2-1. This causes relocation.

FIG. 13 is a sequence chart showing a procedure in the case where the radio management network 2-1 voluntarily executes the relocation when the congestion of its own station is detected in the embodiment of the present invention. Referring to FIG. 13, the wireless management network 2-1 is used as a source wireless management network,
A procedure when the wireless management network 2-2 is the target wireless management network will be described.

The source radio management network 2-1 uses the measurement report (Measurement R) from the user terminal 4.
Even if it receives an eport), the relocation is not executed immediately and the information on the wireless state is retained.

When the source radio management network 2-1 detects the congestion of its own station based on the radio state information and the like held therein, the relocation request (Rel) is sent to the core network 1.
Occurrence Required) is transmitted.

When the core network 1 receives the relocation request from the source radio management network 2-1,
A relocation request is transmitted to the target radio management network 2-2. This message contains information about the service received from the source radio management network 2-1. This causes relocation.

Here, the source radio management network 2-
Reference numeral 1 is a node that manages the service of the user terminal 4 before performing the relocation, and the target radio management network 2-2 is a node that manages the service of the user terminal 4 after the relocation is completed.

FIG. 14 is a sequence chart showing a relocation sequence between the source radio management network 2-1 and the target radio management network 2-2 in the embodiment of the present invention. The sequence of relocation between the source radio management network 2-1 and the target radio management network 2-2 will be described with reference to FIG.

First, the source radio management network 2-1
Requests relocation to core network 1 [Relo
Cation Required (SI = {y, [i,
j, k], [1,1,1], [1,1,0], [0,
0, 1]})] is transmitted. This message contains the combination of services and information about the priority of those combinations.

The core network 1 sends a relocation request [Reloc] to the target radio management network 2-2.
ation Request (SI = {y, [i, j,
k], [1,1,1], [1,1,0], [0,0,
1]})] is transmitted. This message contains information about the service received from the source radio management network 2-1. Target radio management network 2-
When the cell after relocation cannot provide the service before the relocation, 2 refers to the information about the service to detect the best service that can be provided at the present stage. In this example, [i, j, k] =
[1,1,0] is selected.

The target radio management network 2-2 recognizes the relocation request [Relocation Acknowledge] of the service that can be taken over.
(SI = {y, [i, j, k], [1, 1, 0]})]]
Is transmitted to the core network 1. In this example, [i,
j, k] = [1,1,0] is a service that can be taken over.

When the core network 1 receives the relocation request approval, the source radio management network 2-1
Relocation command [Relocation Com
mand (SI = {y, [i, j, k], [1, 1,
0]})] is sent.

This message indicates the service that the target radio management network 2-2 can provide [i, j,
k] = [1,1,0] is the source radio management network 2
-1.

The source radio management network 2-1 uses the relocation delegation (Relocation Commi).
t) is transmitted to the target radio management network 2-2 to notify the target radio management network 2-2 that the relocation is to be performed.

The target radio management network 2-2 detects relocation (Relocation Dete).
In ct), the core network 1 is notified that the wireless management network managing the user terminal 4 has been switched.

The core network 1 indicates that the relocation has been completed by indicating that the relocation has been completed (Relocati
on Complete) to the target radio management network 2-2.

When the above process is completed, the service used by the user terminal 4 is [i, j, k] = [1,
1, 0], but when moving to a cell that can provide a better service than this combination, a request for improvement of a radio access bearer (RAB Modification Req) is made.
It is possible to recover the connection lost in the above sequence by executing "uest)".

In the current use, the user of the user terminal 4 cannot give priority to the service menu, and the core network 1 gives priority to each service. Here, the use of the user terminal 4 is used. It is assumed that a person can give priority to a combination of services separately from the priority of individual services. The user of the user terminal 4 can be given a priority, and the user can be given a priority to the combination of services he is using.

According to the control of the present invention described above, the data transmission capacity that can be ensured at the base station after the handover by performing the handover in the priority setting shown in FIG.
If it is sufficient to provide the service # 1 but insufficient to provide the service # 1 and the service # 3 at the same time, the service # 1 and the service # 3 are collectively held or disconnected. Then, although the priority is lower (priority # 2), it can be controlled to provide only the service # 5 that can be served by the base station after the handover.

By doing so, the user of the user terminal 4 does not perform meaningless handover control such as continuously maintaining only the video signal of the movie A.
Even if the service has a lower priority, it is possible to continuously maintain and provide the service content that is meaningful to the user of the user terminal 4.

In addition, the handover is performed in the situation where the priorities as shown in FIG. 4 are set, and the data transmission capacity that can be provided by the base station after the handover provides the service # 5 and the service # 1 at the same time. However, even if it is possible to provide service # 3, it will be effective even if it is insufficient.

That is, first, since the combination of only the service # 5 has the priority order # 1, it is continuously maintained. Next, the service # 1 and the service # 3 forming the movie A are collectively evaluated, and if it is determined that it is difficult to provide both of them at the same time, both of them are put on hold or disconnected.

By doing so, it is possible to avoid continually maintaining a service which is meaningless to the user of the user terminal 4 such as the service # 1 which provides the video signal in the movie A. it can. As a result, it is possible to reduce meaningless line use in the cell and to operate the system more efficiently.

[0099]

As described above, according to the present invention, a base station for communicating with a moving user terminal, a radio management network for managing the base station, and a switching center connected to the radio management network are included. In a mobile communication service system including a core network, a management table that stores a combination of services available in a user terminal and a priority order of the combination is provided in each of the wireless management network, the core network, and the user terminal. It is currently specified in the handover control of the user terminal by making the combination of services and the priority of the combination among the radio management network, the core network, and the user terminal based on the management table mutually aware. The user terminal user's There is an effect that it is possible to provide a handover control function that matches the determined.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a mobile communication service system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing another configuration example of a mobile communication service system according to an embodiment of the present invention.

FIG. 3 is a diagram showing an example of stored contents of a priority management table of FIG.

FIG. 4 is a diagram showing another example of stored contents of the priority management table of FIG.

FIG. 5 is a sequence chart showing a sequence when a user terminal first starts a service in an embodiment of the present invention.

FIG. 6 is a sequence chart showing a sequence when a new connection is added to a connection established first by a user terminal in an embodiment of the present invention.

FIG. 7 shows a state in which a user terminal moves to a cell in which services that can be provided are limited and the available services are [i, j, k] = [1, 0, 0] according to an embodiment of the present invention. It is a sequence chart which shows the procedure at the time of making a transition.

FIG. 8 is a diagram illustrating a service that can be used by moving from a cell in which a service provided by a user terminal is limited to a cell in which a service limitation is relaxed in one embodiment of the present invention [i,
It is a sequence chart which shows the procedure at the time of transiting to the state of [j, k] = [1,1,0].

FIG. 9 is a sequence chart showing a procedure for executing relocation immediately after receiving a measurement report from a user terminal in an embodiment of the present invention.

FIG. 10 is a diagram showing a state before relocation of the mobile communication service system according to the embodiment of the present invention.

FIG. 11 is a diagram showing a state after relocation of the mobile communication service system according to the embodiment of the present invention.

FIG. 12 is a sequence chart showing a procedure for executing relocation when a source terminal cell of a user terminal using a common channel and a target cell using the common channel have different radio management networks according to an embodiment of the present invention. Is.

FIG. 13 is a sequence chart showing a procedure in the case where the wireless management network voluntarily executes relocation when the congestion of the local station is detected in the embodiment of the present invention.

FIG. 14 is a sequence chart showing a sequence of relocation between a source radio management network and a target radio management network according to an embodiment of the present invention.

FIG. 15 is a block diagram showing a configuration of a mobile communication service system according to a conventional example.

FIG. 16 is a diagram showing a state before relocation of a mobile communication service system according to a conventional example.

FIG. 17 is a diagram showing a state after relocation of a mobile communication service system according to a conventional example.

FIG. 18 is a diagram showing conventional priority setting of services.

[Explanation of symbols]

1 core network 1a, 2a-1, 2a-2 priority management table 2-1 and 2-2 wireless management network 3-1 to 3-4 base station 4 user terminals A1 to A4 cells

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ identification code FI H04Q 7/38 (58) Fields investigated (Int.Cl. ⁷ , DB name) H04B ⁷ /24-7/26 H04Q 7/00 -7/38

Claims (24)

(57) [Claims] 1. A base station for communicating with a moving user terminal, and a radio management network for managing the base station,
A mobile communication service system comprising a core network including a switching center connected to the wireless management network, wherein a management table storing combinations of services available in the user terminal and a priority order of the combinations is provided. The radio management network, the core network, and the user terminal respectively have a combination of the services and the combination of the services between the radio management network, the core network, and the user terminal based on the management table. A mobile communication service system characterized in that priorities are mutually recognized. 2. The mobile communication service system according to claim 1, wherein the radio management network includes a radio base station control station that manages the base station. 3. The management table stores definitions of combinations of services available to the user terminal and priorities of the combinations while complying with prioritization specifications of various services. The mobile communication service system according to claim 1 or 2. 4. The mobile unit according to claim 3, wherein a call control and session management protocol is used for allowing the user terminal and the core network to mutually recognize the contents of the definition. Communication service system. 5. A RANAP (Radio Access Net) for allowing the radio management network and the core network to mutually recognize the contents of the definition.
The mobile communication service system according to claim 3 or 4, wherein a protocol of a work application part) is used. 6. The RNSAP (Radi) in order to make the contents of the definition mutually recognized between the radio management networks.
o Network SubsystemApplic
The mobile communication service system according to any one of claims 3 to 5, characterized in that a protocol of an application part) is used. 7. The handover control for controlling the connection change to the adjacent base station when the signal reception strength from the adjacent base station is higher than the signal reception strength from the base station to which the user terminal is currently connected. 7. The mobile communication service system according to claim 1, wherein the stored contents of the management table are used. 8. A relocation for transferring control information for the user terminal in a radio management network in which the base station to which the user terminal is currently connected and the adjacent base station are managed in different radio management networks. The mobile communication service system according to any one of claims 1 to 7, characterized in that the stored contents of the management table are used. 9. The mobile communication service according to claim 8, wherein the relocation is executed immediately after receiving a signal strength measurement report received from the user terminal via the base station. system. 10. The radio management network voluntarily executes the relocation when congestion of its own station is detected based on a signal strength measurement report from the user terminal. Alternatively, the mobile communication service system according to claim 9. 11. The movement according to claim 8, wherein the stored contents of the management table are transferred from the wireless management network before the relocation to the wireless management network after the relocation. Body communication service system. 12. The management table is transferred from the wireless management network to the core network when the wireless management network determines that the service currently used by the user terminal needs to be changed based on the contents stored in the management table. Radio access bearer improvement request with added storage contents [RA
B (Radio Access Bearer) Mo
12. The mobile communication service system according to any one of claims 1 to 11, wherein the change of the service of the user terminal is requested by transmitting a "Dictionation Request". 13. The prioritization specifications of the various services are 3GPP (3rd Generation Par).
The mobile communication service system according to any one of claims 3 to 12, wherein the mobile communication service system is based on a specification of a tnership project). 14. A mobile of a system comprising a base station for communicating with a moving user terminal, a radio management network for managing the base station, and a core network including a switching center connected to the radio management network. A communication service providing method, comprising: a management table which is provided in each of the wireless management network, the core network, and the user terminal and stores a combination of services available in the user terminal and a priority order of the combination. A mobile communication service providing method, characterized in that the combination of the services and the priority order of the combination are mutually recognized among the wireless management network, the core network and the user terminal based on the basis. 15. The mobile communication service providing method according to claim 14, wherein the radio management network includes a radio base station control station that manages the base station. 16. The management table stores definitions of combinations of services available to the user terminal and priorities of the combinations while complying with prioritization specifications of various services. 16. The mobile communication service providing method according to claim 14 or 15. 17. The protocol for call control and session management is used for allowing the user terminal and the core network to mutually recognize the contents of the definition.
The mobile communication service providing method described above. 18. A RANAP (Radio Access Ne) for allowing the radio management network and the core network to mutually recognize the contents of the definition.
2. A protocol of a "work application part" is used.
The mobile communication service providing method according to claim 6 or claim 17. 19. The RNSAP (Rad) in order to make the contents of the definition mutually recognized between the radio management networks.
io Network SubsystemAppli
19. The mobile communication service providing method according to any one of claims 16 to 18, characterized in that a protocol of a "Cation Part" is used. 20. Handover control for controlling connection change to the adjacent base station when the signal reception strength from the adjacent base station is higher than the signal reception strength from the base station to which the user terminal is currently connected 20. The mobile communication service providing method according to claim 14, wherein the storage content of the management table is used. 21. When the base station to which the user terminal is currently connected and the adjacent base station are managed by different radio management networks, relocation for transferring control information for the user terminal in those radio management networks. 21. The mobile communication service providing method according to claim 14, wherein the storage content of the management table is used. 22. The mobile communication service providing method according to claim 21, wherein the stored contents of the management table are transferred from the wireless management network before the relocation to the wireless management network after the relocation. 23. The stored content of the management table is added to the core network from the wireless management network when it is determined that the service currently used by the user terminal needs to be changed based on the stored content of the management table. Radio access bearer improvement request [RAB (Radio Acces
s Bearer) Modification Re
request to change the service of the user terminal by transmitting "quest]".
The mobile communication service providing method according to any one of claims 4 to 22. 24. The prioritization specifications of the various services are 3GPP (3rd Generation Par).
26. The method according to claim 16 to claim 23, characterized in that it is based on the specifications in the tnership Project.
A method for providing a mobile communication service according to any one of 1.