JP2005277911A - Portable telephone packet call connection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a call loss from being generated by reporting the information of the existence of a packet resource in a portable telephone network to a portable telephone set before the portable telephone calls the packet. <P>SOLUTION: A radio network control station RNC3 integrally controls a portable telephone base station device 2. A core network CN4 manages the control of the position registration of the portable telephone set 1, call control, and user information. A portable telephone network 5 reports information concerning whether or not the portable telephone network 5 itself holds the resource of the packet assigned to the portable telephone set 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cellular phone packet call connection system, and more particularly to a cellular phone packet call connection system that stops packet calls from a cellular phone when the cellular phone network does not hold packet resources that can be allocated to the cellular phone.

  In recent years, mobile radio communication systems typified by mobile phones and PHS have been widely used. There are many protocols for data communication especially used for mobile phones. Depending on the protocol, dedicated resources may be required. In this case, it is common to acquire necessary resources at that time and connect to the data link.

  In a base station to which a CDMA (Code Division Multiple Access) method is applied, a value obtained by adding an interference increase amount predicted from an information transfer rate and transmission capability required by a line to an intra-cell interference amount that is constantly measured; The free capacity is determined by comparison with the maximum allowable interference amount threshold value defined in the system. In the CDMA system, since the free capacity is determined based on the above-described interference amount, even if the number of mobile stations in communication in the cell is constant, the positional relationship of mobile stations, the sound rate during voice communication, etc. The free space varies depending on the type.

  When there is a shortage of packet resources on the mobile phone network side when a packet call (packet call due to browsing, Internet connection, use of e-mail, etc.) is issued from the mobile phone regarding the free space of this system In some cases, a disconnection notification is received from the call and the call is lost.

  In a conventional cellular phone packet call connection system, when a data link connection request is received from a wireless terminal, the wireless base station cannot perform data link connection unless resources for the communication channel are prepared. In order to prevent this, resources for data communication are efficiently allocated within a plurality of radio base stations so that many radio terminals can perform data communication (see, for example, Patent Document 1).

JP 2000-50350 A (page 2-3, FIG. 1)

  In the conventional cellular phone packet call connection system described above, the cellular phone is currently connected within the cell to which the cellular phone is connected until a disconnection notification is received as “resource shortage” from the cellular phone network after the packet call is made. However, it has a drawback that it cannot be known whether or not a packet call can be made.

  Also, when a packet call is made from a mobile phone, if the mobile phone network has already used all the packet resources that can be allocated to the mobile phone in response to a request from the mobile phone, it is disconnected from the mobile phone network as a resource shortage It has the disadvantage of receiving a notification and causing a call loss.

  An object of the present invention is to provide a mobile phone packet call connection system that eliminates call loss that occurs by notifying the mobile phone of information on the presence or absence of packet resources in the mobile phone network before the mobile phone makes a packet call. Is to provide.

The cellular phone packet call connection system of the present invention includes:
A mobile phone, a mobile phone base station, and a mobile phone network;
The mobile phone network is
The mobile phone has a notification means for notifying the mobile phone whether or not the mobile phone has a packet resource that can be allocated when the mobile phone base station completes location registration. Yes.

A mobile phone, a mobile phone base station, and a mobile phone network;
The mobile phone does not accept a call request when the mobile phone network has used up the resources of the packet and does not hold a resource that can be allocated to the mobile phone. It is characterized by having a call request rejection means that does not transmit a signal.

A mobile phone, a mobile phone base station, and a mobile phone network;
The mobile phone network is
A notification means for notifying the mobile phone whether or not the mobile phone has a packet resource that can be allocated to the mobile phone when the mobile phone base station completes location registration;
The mobile phone does not accept a call request when the mobile phone network has used up packet resources and does not have resources that can be allocated to the mobile phone, and does not accept a call request, and It is characterized in that a call request rejection means that does not transmit a signal is provided.

  The mobile phone network is characterized by notifying the mobile phone of information that does not hold the resource as notification information when the resource of the packet is exhausted and the resource that can be allocated to the mobile phone is not held. .

The mobile phone network is
A radio network control station that performs overall control of the mobile phone base station, and a core network that performs location registration control, call control, and user information management of the mobile phone.

  Means for rejecting a call request for a preset packet call for T seconds when the mobile phone network is informed by the notification information from the mobile phone network that it does not hold an assignable packet resource; It is characterized by having prepared.

  The mobile phone receives new notification information within the T seconds for rejecting a call request for a packet call, and immediately responds to the call request when acquiring information indicating that there is an assignable packet resource. It is a feature.

The mobile phone is
When the mobile phone network receives information that does not hold a resource assigned to the mobile phone, the information is displayed.

In addition, a wireless communication unit that performs wireless transmission and reception, a display unit that displays a message, and a control unit,
When information that does not hold resources allocated to a mobile phone is received from the mobile phone network, the information is displayed on the display unit.

A wireless communication unit that performs wireless transmission and reception, a display unit that displays a message, and a control unit,
The controller is
When the cellular phone network has used up the resources of the packet and does not hold the resources that can be allocated to the cellular phone, the cellular phone network rejects the call request for the packet call without accepting the call request. It is said.

When the mobile phone is waiting for location registration at the mobile phone base station, the mobile phone network notifies the mobile phone whether or not the mobile phone network has a packet resource that can be allocated to the mobile phone,
A method of rejecting a call request for a packet call without accepting a call request when the mobile phone network has used up the resources of the packet and does not hold a resource that can be allocated to the mobile phone; It is a feature.

  In the cellular phone packet call connection system of the present invention, when the cellular phone network runs out of packet resources and does not have packet resources that can be allocated to the cellular phone, a signal related to the outgoing call of the packet call from the cellular phone is transmitted. Therefore, the call loss due to the lack of packet resources is eliminated.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing an embodiment of a cellular phone packet call connection system of the present invention.

  The embodiment shown in FIG. 1 includes a mobile phone 1, a mobile phone base station apparatus 2, an RNC (Radio Network Controller) 3, and a CN (Core Network: core network) 4. ing. The RNC 3 and the CN 4 constitute a mobile phone network 5.

  The RNC 3 performs overall control of the mobile phone base station apparatus 2. The CN 4 manages the location registration control, call control, and user information of the mobile phone 1.

  The cellular phone 1 includes a wireless communication unit 6 that performs wireless transmission / reception, a display unit 8 that displays a message, and a control unit 7 that manages and controls the entire cellular phone.

  Note that FIG. 1 describes an IMT-2000 system configuration as an example.

  In the IMT-2000 system, setting parameters necessary for the mobile phone 1 to connect to the mobile phone network 5 and connection information (hereinafter referred to as broadcast information) such as other cells existing around the cell exist in the cell. The mobile phone 1 is notified. Here, the cell is an area that the mobile phone base station apparatus 2 can cover.

  The mobile phone network 5 adds information on whether or not the mobile phone network 5 itself has a packet resource that can be assigned to the mobile phone 1 to the broadcast information.

  This is because whether or not the mobile phone network 5 has resources that can be allocated to the call requested from the mobile phone 1 before the user performs the packet call calling operation on the mobile phone 1. Means to notify.

  When the mobile phone network 5 does not hold the resource to be assigned to the mobile phone 1, the mobile phone network 5 transmits information not holding the resource as broadcast information at that time. The mobile phone 1 that has received information that the resource is not held by the wireless communication unit 6 notifies the user of the fact to the display unit 8 of the mobile phone 1.

  When notified from the mobile phone network 5 of broadcast information that does not hold an assignable packet resource, the mobile phone 1 rejects a call request for a packet call from the user for T seconds by the control unit 7. When the mobile phone 1 receives new broadcast information within T seconds and obtains broadcast information that has an assignable packet resource, it immediately responds to the call request from the user.

  This mobile phone 1 has a function of making it difficult to return to a resource-deficient cell that was originally located when moving from a resource-deficient cell that has been registered to another cell in the vicinity. doing. In addition, when the mobile phone 1 receives the resource shortage information from the mobile phone network 5, the mobile phone 1 can easily move from the cell where the current location is registered to another cell existing in the vicinity. That is, it is set in a state that facilitates handover.

  This system is applicable not only to packet resource shortages but also to other call types and services. Further, the present system is not limited to IMT-2000 but can be applied to other systems having similar control signals.

  Furthermore, the present invention can be applied to an existing mobile phone system including a mobile phone used by a user.

  As described above, the mobile phone network 5 can be assigned to the mobile phone 1 when the mobile phone 1 is in a standby state with the mobile phone base station device 2, preferably when a location registration request is received, or when the location registration is completed. The mobile phone 1 is notified whether or not the packet resource is held.

  When the mobile phone 1 receives a notification from the mobile phone network 5 that does not hold resources that can be allocated to the mobile phone 1, the mobile phone 1 does not accept a call request from the user. Accordingly, the cellular phone 1 does not transmit a signal related to the origination of the packet call to the cellular phone network 5.

  The mobile phone 1 moves to a cell of another mobile phone base station device 2 when the mobile phone network 5 does not hold the packet resource.

  FIG. 2 is a diagram illustrating a reception state of a mobile phone that hands over a cell.

  2 corresponding to the components shown in FIG. 1 are denoted by the same reference numerals or symbols, and the description thereof is omitted.

  As shown in FIG. 2, since the mobile phone 1 that is powered on is located in the cell A10, the broadcast information of the cell A10 is received. When the mobile phone 1 moves to the cell B 20 and is handed over in a power-on state, the mobile phone 1 receives broadcast information corresponding to the cell B 20.

  FIG. 3 is a diagram showing a configuration of a master information block of a broadcast information layer 3 RRC (Radio Resource Control) message.

  The broadcast information layer 3 RRC message is composed of a system information block (Master Information Block) and a master information block (Master Information Block).

  The system information block notifies the setting parameters of each channel and cell information existing in the vicinity.

  The master information block notifies the scheduling information of the system information block. Here, the scheduling of the system information block indicates timing information indicating at what timing the system information block is transmitted from the mobile phone network 5.

  The system information block and the master information block described above exist in the layer 3 message of the broadcast information. When the mobile phone 1 moves between cells (handover), the mobile phone 1 first acquires a master information block. Therefore, information on the presence / absence of packet resources of the mobile phone network 5 is added to the master information block of this layer 3 message, and the mobile phone 1 is notified.

  The cellular phone network 5 adds the presence / absence information of resources that can be allocated to the cellular phone 1 in the padding data of the master information block. As shown in FIG. 3, the master information block is data consisting of 246 bits, and is composed of a message data part and a padding part. Normally, the range from the last part of the message data part to the 246th bit is padded with “0”. When there is a packet resource, the first 1 bit of this padding part is set to “1”. That is, if the first bit of the padding portion is “1”, it means that there is a packet resource that can be allocated to the mobile phone 1. If the first 1 bit of this padding part is “0”, it means that there is no packet resource that can be allocated to the mobile phone 1.

  In FIG. 3, as an example, if the first bit of the padding part is “1”, the packet resource exists. However, if the presence or absence of the packet resource can be determined, the first bit of the padding part is limited. Is not to be done.

  FIG. 4 is a diagram for explaining the operation of the mobile phone depending on the presence or absence of packet resources.

  The left side of FIG. 4 shows the operation of the mobile phone 1, and the right side shows the operation of the notification information from the mobile phone network 5.

  The operation will be described with reference to FIG. The mobile phone 1 that is powered on receives notification information from the mobile phone network 5. When the mobile phone 1 receives information from the padding portion of the master information block that does not hold an assignable packet resource, the mobile phone 1 sets the “no packet resource flag” to “ON” as an internal process of the mobile phone 1. At the same time, the fact is reported to the user of the mobile phone 1. The user notification of this information may be displayed on a liquid crystal screen (not shown) of the mobile phone 1.

  When the mobile phone 1 receives information that the mobile phone network 5 does not hold an assignable packet resource, that is, when the “no packet resource flag” is “ON”, the mobile phone 1 issues a request to send a packet call. If so, the following operations are performed. The user is notified that the mobile phone network is currently short of packet call resources, and the packet call origination request is rejected. Thereby, it is possible to prevent a useless signal from being transmitted from the mobile phone 1.

  When the mobile phone 1 receives new broadcast information (master information block), the “no packet resource flag” is overwritten with new resource information added thereto. However, if the mobile phone 1 rejects the notification information under some condition, it cannot be overwritten with the resource information.

  Here, the rejection of the broadcast information means that when the mobile phone 1 moves to a new cell and receives the broadcast information, if the content is abnormal, the received broadcast information is discarded and the location registration for the new cell is performed. Indicates no request.

  The cellular phone 1 starts a built-in timer T (T-second timer) at the timing when the “no packet resource flag” is set to “ON”.

  The state where the “no packet resource flag” is “ON” is held for T seconds during the timer operation. During this time, the mobile phone 1 does not accept a call request from the user. When the timer operation time T expires and stops, the “no packet resource flag” is set to “OFF”. When the mobile phone 1 continues to be in the same cell, the notification information is basically not read again except for some patterns. This means that there is a possibility that the mobile phone network 5 may secure packet resources that can be allocated to the mobile phone 1 T seconds after the broadcast information is first read. When the timer T stops, the mobile phone 1 accepts a call request from the user again.

  Next, the mobile phone 1 moves and moves to another cell. At this time, when the packet resource absence information is acquired again from the cellular phone network 5, the cellular phone 1 sets the “packet resource absence flag” to “ON” again and starts the operation of the timer T. Within the operation time T of the timer, the mobile phone 1 further moves and moves to another cell. If the broadcast information from the cellular phone network 5 is “present” at this time, the cellular phone 1 sets the “no packet resource flag” to “OFF” and stops the operation of the timer T. Thereafter, the mobile phone 1 accepts a user's call request during this interval.

  Next, a procedure for establishing and releasing a radio resource between the mobile phone 1 and the mobile phone network 5 will be described for the above-described operation.

  FIG. 5 is a diagram showing a signal protocol for establishing and releasing radio resources.

  Referring to FIG. 5, when the mobile phone 1 makes a packet call in response to a call request from a user in a state where the “no packet resource flag” is “OFF”, the mobile phone network 5 sets a series of radio resources. Perform the establishment procedure. If a disconnection notification is received from the mobile phone network 5 because of “resource shortage” during the execution of this establishment procedure, the mobile phone 1 performs a procedure for releasing the used radio resources. The mobile phone 1 reads the notification information again immediately after releasing the radio resource.

  When receiving no packet resource information at the timing from the mobile phone network 5 (broadcast information reception processing), the “no packet resource flag” of the mobile phone 1 is set to “ON” again.

  Note that the details of a series of procedures (SERVICE REQUEST, authentication procedure, SEQUITY procedure, ACTIVATE PDP CONTEXT REJECT, RAB establishment procedure, ACTIVATE PDP CONNECT REJECT) in FIG. 5 are described in the document “Signal Protocol (IMT2000) ) Technical specifications: 3GPP TS 24.008; V3.14.0 (2002-12); issued by 3GPP Organic Partners ", and the description thereof is omitted here.

  Usually, the cellular phone 1 monitors the quality of the cell whose location is registered and the cells existing in the vicinity thereof. When the quality of a cell existing in the vicinity satisfies a certain condition, the mobile phone 1 performs an operation of moving from the cell where the current location is registered to the surrounding cell.

  However, when the mobile phone 1 receives the “resource shortage” information from the mobile phone network 5, the mobile phone 1 can easily move to another cell because of the shortage of resources.

  There are various methods for easily moving the mobile phone 1 to another cell. Here, the values of the minimum required quality level (Q-qualmin) and the minimum required reception level (Q-rxlevmin) in the destination cell notified by the broadcast information are the values of the actually received cell measurement quality level and cell reception. Setting a value lower than the level facilitates handover. The minimum required quality level (Q-qualmin) and the minimum required reception level (Q-rxlevmin) are notified by broadcast information.

  Next, a method that makes it difficult to move will be described.

  FIG. 6 is a diagram illustrating a state where movement between cells is suppressed.

  The mobile phone 1 that has received the resource shortage information is provided with a function that makes it difficult to return to the original “resource shortage” cell after moving from the “resource shortage” cell to another cell. For this reason, the network 5 registers the frequency and the scrambling code in the “resource shortage cell list” for the cell that has received the “resource shortage” information. In the case of FIG. 6, frequency: A and scrambling code: 10 are added to the resource-deficient cell list for the resource-deficient cell A. In the cell B, the values of the minimum required quality level (Q-qualmin) in the cell and the minimum required reception level (Q-rxlevmin) in the cell are set to values lower than the actually received cell measurement quality level and cell reception level. . This facilitates movement to another cell B.

  The mobile phone 1 moves to another cell B. Since the cell A is registered in the “resource shortage cell list” in the cellular phone network 5, the minimum required quality level (Q-qualmin) in the cell A and the minimum required reception level (Q-rxlevmin) in the cell ) Is treated as a value larger than the value actually received. Thus, the cellular phone 1 realizes a function that makes it difficult to return to the cell A.

  Registration in the “resource-deficient cell list” in the mobile phone network 5 of the mobile phone 1 is continued for a predetermined time set in advance. It is assumed that the cell information is discarded in the cellular phone network 5 when a predetermined time has elapsed after being registered in the “resource deficient cell list”.

  The present system is not limited to the function of notifying the resource shortage of the packet call, but can be applied to other call types and services. Also, by using a plurality of padding bits, a plurality of information can be added simultaneously.

  As described above, when the cellular phone network 5 uses up the packet resources and does not hold the packet resources that can be allocated to the cellular phone 1, a signal related to the outgoing of the packet call from the cellular phone 1 is not transmitted. Call loss due to lack of resources is eliminated.

  When the mobile phone 1 is registered in a base station with insufficient packet resources, it is easy to move to another base station, so that the possibility of staying in a base station with insufficient packet resources is reduced.

It is a block diagram which shows one Embodiment of the mobile telephone packet call connection system of this invention. It is a figure explaining the reception state of the mobile telephone which hands over a cell. It is a figure which shows the structure of the master information block of the alerting | reporting information layer 3 message. It is a figure explaining operation | movement of the mobile telephone by the presence or absence of a packet resource. It is a figure which shows the signal protocol of the establishment procedure of a radio | wireless resource, and a release procedure. It is a figure explaining the state which suppresses the movement between cells.

Explanation of symbols

1 Mobile phone 2 Mobile phone base station 3 RNC
4 CN
5 Cellular phone network 6 Wireless communication unit 7 Control unit 8 Display unit 10 Cell A
20 cell B

Claims (11)

A mobile phone, a mobile phone base station, and a mobile phone network;
The mobile phone network is
The mobile phone has a notification means for notifying the mobile phone whether or not the mobile phone has a packet resource that can be allocated to the mobile phone when the mobile phone base station waits for location registration. Mobile phone packet call connection system. A mobile phone, a mobile phone base station, and a mobile phone network;
The mobile phone does not accept a call request when the mobile phone network has used up the resources of the packet and does not hold a resource that can be allocated to the mobile phone. A cellular phone packet call connection system comprising call request rejection means for not transmitting a signal. A mobile phone, a mobile phone base station, and a mobile phone network;
The mobile phone network is
A notification means for notifying the mobile phone whether or not the mobile phone has a packet resource that can be allocated to the mobile phone when the mobile phone base station completes location registration;
The mobile phone does not accept a call request when the mobile phone network has used up the resources of the packet and does not hold a resource that can be allocated to the mobile phone. A cellular phone packet call connection system, characterized in that a call request rejection means that does not transmit a signal is provided.   The mobile phone network notifies the mobile phone of information that does not hold the resource as broadcast information when the resource of the packet is exhausted and the resource that can be allocated to the mobile phone is not held. 4. The mobile phone packet call connection system according to claim 1, 2, or 3. The mobile phone network is
A wireless network control station that performs overall control of the mobile phone base station, and a core network that performs location registration control, call control, and user information management of the mobile phone. Or the mobile phone packet call connection system according to 4;   Means for rejecting a call request for a preset packet call for T seconds when the mobile phone network is informed by the notification information from the mobile phone network that it does not hold an assignable packet resource; 6. The cellular phone packet call connection system according to claim 1, further comprising a cellular phone packet call connection system.   The mobile phone receives new notification information within the T seconds for rejecting a call request for a packet call, and immediately responds to the call request when acquiring information indicating that there is an assignable packet resource. The cellular phone packet call connection system according to claim 6, wherein: The mobile phone is
6. The mobile phone packet call connection system according to claim 1, wherein the information is displayed when the mobile phone network receives information that does not hold resources allocated to the mobile phone. . A wireless communication unit that performs wireless transmission and reception, a display unit that displays a message, and a control unit,
When information that does not hold resources allocated to a mobile phone is received from the mobile phone network, the information is displayed on the display unit. A wireless communication unit that performs wireless transmission and reception, a display unit that displays a message, and a control unit,
The controller is
When the mobile phone network has used up the resources of the packet and does not hold the resources that can be allocated to the mobile phone, the mobile phone network rejects the call request for the packet call without accepting the call request. Mobile phone. When the mobile phone is waiting for location registration at the mobile phone base station, the mobile phone network notifies the mobile phone whether or not the mobile phone network has a packet resource that can be allocated to the mobile phone,
The mobile phone does not accept a call request and rejects a call request for a packet call when the mobile phone network has used up resources of the packet and does not hold a resource that can be allocated to the mobile phone. A cellular phone packet call connection method as a feature.

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