JP2013066122A - Mobile communication system, access device, radio resource management method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile communication system capable of equally giving communication opportunities to multiple mobile communication terminals.SOLUTION: A mobile communication system includes: mobile communication apparatuses 10, 11; an access device 20 for performing radio communication with the mobile communication apparatuses 10, 11; and an access gateway device 30 for controlling the access device 20. The access device 20 includes a radio resource management part 21 for managing radio resources to be assigned to the mobile communication apparatus 10 and the mobile communication apparatus 11 on the basis of a communication guarantee time of the mobile communication apparatus 10 that has already been connected and a communication duration time when an access request is received from the mobile communication device 11 in a state where there is not radio resources to be assigned.

Description

  The present invention relates to a mobile communication system, and more particularly to a mobile communication system that controls radio resources allocated to a mobile communication device.

  In a mobile communication system, a communication terminal performs wireless communication with a base station using a predetermined wireless method. Here, a communication system described in Non-Patent Document 1 will be described as a configuration of a general mobile communication system. As illustrated in FIG. 9, the communication system disclosed in Non-Patent Document 1 includes an eNodeB 110, an MME 120, a Serving GW 130, and a PDN GW 140.

  The eNodeB 110 is a wireless access device that provides connectivity to a communication system to a communication terminal using a wireless access method called Long Term Evolution (LTE).

  The MME 120 is a control device that performs control for the communication terminal to enjoy mobile services via the eNodeB 120, such as authentication and handover between eNodeBs. Serving GW 130 is a device that provides a bearer that is a communication path for a communication terminal to perform data communication. The Serving GW 130 establishes a tunnel for packet transfer between the eNodeB 110 and the PDN GW 140 in order to provide a bearer.

  The PDN GW 140 is a device that terminates a bearer that is a communication path for a communication terminal to perform packet communication. The PDN GW 140 establishes a packet transfer tunnel with the Serving GW in order to provide a bearer.

  FIG. 10 shows a procedure in which the communication terminal 101 tries to start data communication in a state where the communication terminal 100 is connected to the communication system 1 shown in FIG. 9 and performing data communication. First, the communication terminal 100 performs data communication via the eNodeB 110 (S101). At this time, the communication terminal 100 is performing a large amount of data communication and is in a state where the radio resources of the eNodeB 110 are used up. Thereafter, in order for the communication terminal 101 to start data communication via the eNodeB 110, a Service Request message is transmitted (S102). Thereby, the communication terminal 101 tries to reconstruct the bearer between the communication terminal 101 and the Serving GW 130.

  When the MME 120 receives the Service Request message, the MME 120 transmits an Initial Context Setup Request to the eNodeB 110 in order to secure a bearer for the communication terminal 101 (S103).

  The eNodeB 110 checks whether or not radio resources can be allocated to the communication terminal 101 (S104). However, the radio resource of the eNodeB 110 is used up by the communication terminal 100. For this reason, the eNodeB 110 cannot allocate radio resources to the communication terminal 101. Therefore, the eNodeB 110 transmits an Initial Context Setup Fail message to the MME 120 in order to notify the bearer reconfiguration failure of the communication terminal 101 (S105). Upon receipt of the Initial Context Setup Failure message, the MME 120 transmits a Service Reject to notify the communication terminal 101 of bearer reconfiguration failure (S106).

Japanese Patent Application Laid-Open No. 60-183865

3GPP TR 23.401 V10.4.0 "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access", [Search June 20, 2011], Internet <http: //www.3gpp .org / ftp / Specs / html-info / 23401.htm>

  However, the above-described mobile communication system has a problem in that when communication resources are tight, communication opportunities cannot be equally given to a plurality of communication terminals. This is because when there are multiple communication terminals with the same communication resource allocation priority, the communication terminal to which the communication resource has been allocated first occupies the communication resource for a long time, and therefore communicates with another communication terminal. This is because resources cannot be allocated.

  On the other hand, Patent Document 1 discloses a channel reservation method for providing a reservation service in a circuit switch used in wired communication. In the circuit switch in Patent Document 1, when a reserved call of a reservation terminal that reserves a channel of the circuit switch is activated, if there are not enough free channels, the free channel is disconnected by disconnecting the call in communication. And use that free channel for reserved calls.

  However, since the technique disclosed in Patent Document 1 is a technique for a reserved call that is known to occur in advance, it cannot be applied to an immediate call that cannot be predicted in advance. .

  In order to solve such a problem, an object of the present invention is to provide a mobile communication system, an access device, a radio resource management method, and a program capable of giving equal communication opportunities to a plurality of mobile communication terminals. .

  A mobile communication system according to a first aspect of the present invention includes a mobile communication device, an access device that performs wireless communication with the mobile communication device, and an access gateway device that controls the access device as a host device of the access device. The access device includes a first mobile communication device that is already connected when there is an access request from the second mobile communication device in a state where there is no radio resource to be newly assigned. A radio resource management unit that manages radio resources allocated to the first mobile communication device and the second mobile communication device based on a communication guarantee time of the device and a communication continuation time of the first mobile communication device It is what has.

An access device according to a second aspect of the present invention is an access device provided between a mobile communication device and an access gateway device, which is a higher-level device, and newly performs mobile communication in a state where there is no newly allocated radio resource. When there is an access request from a device, the access request is newly made based on the communication guarantee time of the already connected mobile communication device and the communication continuation time of the already connected mobile communication device. A radio resource management unit that manages radio resources to be allocated to the mobile communication device and the already connected mobile communication device is provided.

  The radio resource management method according to the third aspect of the present invention provides a communication guarantee of an already connected mobile communication device when there is a new access request from the mobile communication device in a state where there is no new radio resource to be allocated. Adjust radio resources allocated to the newly requested mobile communication device and the already connected mobile communication device based on the time and the communication duration of the already connected mobile communication device The step to perform is provided.

  The program according to the fourth aspect of the present invention includes a communication guarantee time of an already connected mobile communication device when there is a new access request from the mobile communication device in a state where there is no newly allocated radio resource, Adjusting a radio resource allocated to the mobile communication device that has newly made an access request and the already connected mobile communication device based on the communication duration of the already connected mobile communication device. It is what is executed by a computer.

  According to the present invention, it is possible to provide a mobile communication system, an access device, a radio resource management method, and a program capable of equally giving communication opportunities to a plurality of mobile communication terminals.

1 is a configuration diagram of a mobile communication system according to a first embodiment. 1 is a configuration diagram of a mobile communication system according to a first embodiment. 1 is a configuration diagram of an access device according to a first embodiment; 3 is a sequence of bearer reconstruction processing of the mobile communication system according to the first exemplary embodiment; 4 is a processing flow when the access device according to the first embodiment receives a radio bearer generation request message. It is a processing flow at the time of reception of the radio bearer generation request message of the access device according to the second exemplary embodiment. FIG. 4 is a configuration diagram of a mobile communication system according to a third embodiment. It is a sequence of the bearer reconstruction process of the mobile communication system concerning Embodiment 3. FIG. 1 is a configuration diagram of a communication system disclosed in Non-Patent Document 1. FIG. It is the sequence of the bearer reconstruction process of the communication system currently disclosed by the nonpatent literature 1.

(Embodiment 1)
Embodiments of the present invention will be described below with reference to the drawings. First, the configuration example of the mobile communication system according to the first exemplary embodiment of the present invention is described with reference to FIG. The mobile communication system includes mobile communication devices 10 and 11, an access device 20, and an access gateway device 30. In addition, the access device 20 includes a radio resource management unit 21.

  The mobile communication devices 10 and 11 perform wireless communication with the access device 20. The access gateway device 30 controls the access device 20 as a host device of the access device 20. The access gateway device 30 controls the plurality of access devices 20.

  In a mobile communication system, it is necessary to maintain communication even when the mobile communication device moves and the access device 20 that performs wireless communication is changed. Therefore, a host device that manages or controls a plurality of access devices is required. Thus, the access gateway device 30 is arranged so as to control a plurality of access devices as a host device.

  The access gateway device 30 receives an access request from the mobile communication device 10 and generates a communication path between the mobile communication device 10 and the access gateway device 30. Here, the communication path generated between the mobile communication device 10 and the access gateway device 30 may be referred to as a bearer. The bearer in the radio section is particularly called a radio bearer.

  The access device 20 performs wireless communication with a plurality of mobile communication devices. The access device 20 has a wireless access function that provides connectivity to the mobile communication device using a predetermined wireless access method. When performing wireless communication, the radio resources allocated to each mobile communication device are limited. Therefore, when an access request is received from a new mobile communication device 11, an event in which there is no radio resource to be allocated can occur. In such a case, the radio resource management unit 21 of the access device 20 makes a new access request based on the communication continuation time and communication guarantee time of a plurality of mobile communication devices including the mobile communication device 10. Management of radio resources allocated to a plurality of mobile communication devices including the communication device 11 is performed. The guaranteed communication time is the minimum time for allowing the mobile communication device 10 to communicate. For example, the communication guarantee time is a minimum time for guaranteeing the maintenance of the communication path generated between the mobile communication device 10 and the access gateway device 30.

  The communication continuation time indicates, for example, the time from when the communication path is generated between the mobile communication device and the access gateway device 30 until the present time. In this case, even if the mobile communication device is not actually transmitting / receiving data, the communication duration is included in the communication duration while the communication path is maintained.

  As described above, by using the mobile communication system of FIG. 1, even when there is no radio resource to be allocated when a new mobile communication device 11 issues an access request to the access device 20, the access device 20. Wireless resources can be managed on the basis of the communication guarantee time and the communication continuation time of each mobile communication device that is performing wireless communication with the mobile phone. By managing radio resources in this way, it becomes possible to allocate radio resources to the mobile communication apparatus 11 that has newly requested access, and perform radio communication with the mobile communication apparatus 11. It can be carried out. Thereby, a communication opportunity can be given equally to the mobile communication terminals located in the area managed by the access device 20.

  Then, the detailed structural example of the mobile communication system concerning Embodiment 1 of this invention is demonstrated using FIG. The mobile communication system of FIG. 2 includes mobile communication devices 10 and 11, an access device 20, an access gateway device 30, and a mobile anchor device 40. The access gateway device 30 includes a C-plane function unit 32 and a U-plane function unit 33. The C-plane function unit 32 includes a communication guarantee time determination unit 31. The mobile communication devices 10 and 11 and the access device 20 have the same functions as those described in FIG.

  The C-plane function unit 32 executes authentication processing of the mobile communication devices 10 and 11 that make an access request to the access device 20 and handover control. The authentication process is a process for determining whether or not to permit access when the mobile communication devices 10 and 11 access the mobile communication network. In handover control, a mobile communication device that moves from an area managed by the access device 20 to an area that is managed by another access device or a movement that moves from an area managed by another access device to an area managed by the access device 20 Data transfer to a communication device is included.

  The C-plane function unit 32 includes a communication guarantee time determination unit 31. The guaranteed communication time determination unit 31 determines the guaranteed communication time for the mobile communication device connected to the access device 20 when there is an access request from the mobile communication device connected to the access device 20. As the guaranteed communication time, the same value may be used for a plurality of mobile communication devices connected to the access device 20. Alternatively, a different value may be used for each of a plurality of mobile communication devices connected to the access device 20 as the guaranteed communication time. When a different communication guarantee time is used for each mobile communication device, the server for managing subscriber information manages the communication guarantee time for each mobile communication device, and when there is an access request from the mobile communication device 10, The access gateway device 30 may extract a communication guaranteed time corresponding to the mobile communication device 10. Further, when a different communication guarantee time is used for each mobile communication device, the communication guarantee time may be determined according to the priority set for each mobile communication device. For example, a mobile communication device with a high communication priority may be set to have a longer communication guarantee time than other mobile communication devices. Also, the communication guarantee time may be set as the contract information of the subscriber who uses each mobile communication device.

  The U-plane function unit 33 provides the mobile communication device 10 or 11 with a bearer for the mobile communication device 10 to perform packet communication. Specifically, a bearer between the mobile communication device 10 or 11 and the access gateway device 30 and a bearer between the access gateway device 30 and the mobile anchor device 40 are set. The bearer is used as a tunnel for packet transfer.

  The mobile anchor device 40 terminates a bearer used for the mobile communication device 10 or 11. The mobile anchor device 40 sets a bearer with the U-plane function unit 33.

  Next, a configuration example of the access device 20 according to the first embodiment of the present invention will be described with reference to FIG. The access device 20 includes a radio resource management unit 21, an access management unit 22, and a packet transfer unit 23.

  The radio resource management unit 21 manages the status of radio resources. For example, the amount of radio resources in use and the amount of free radio resources are managed. Further, the radio resource management unit 21 manages the allocated radio resource amount for each mobile communication device.

  The access management unit 22 performs access control for access performed from the mobile communication devices 10 and 11 to the access device 20 in cooperation with the C-plane function unit 32. Further, the access management unit 22 manages radio bearers between the mobile communication device 10 and the access device 20 and between the mobile communication device 11 and the access device 20. Furthermore, the access management unit 22 executes a handover process.

  Radio bearer management includes a new radio bearer generation process for a mobile communication device that has made an access request, a radio bearer release process that has not been performed for a certain period of time, a radio bearer communication duration management, and the like. .

  When there is no radio resource to be allocated to the mobile communication apparatus that has newly requested access, the access management unit 22 allocates radio resources as follows in order to equalize communication opportunities. The access management unit 22 compares the communication duration time of the radio bearer set with each mobile communication device and the communication guarantee time. Furthermore, the access management unit 22 extracts a mobile communication terminal whose communication duration of the radio bearer exceeds the communication guarantee time, releases a radio bearer with a mobile communication device having a long communication duration, and releases the mobile communication Releases radio resources allocated to the device. The access management unit 22 allocates the radio resources secured in this way to the mobile communication device that has newly made an access request.

  The guaranteed communication time is output from the access gateway device 30 and set in the access management unit 22.

  In the handover process, a radio bearer release process set between a mobile communication device that moves to an area managed by an access device different from the access device 20 or a mobile communication device that has moved to an area managed by the access device 20 And a new radio bearer setting process and the like.

  The packet transfer unit 23 uses the bearer between the mobile communication device 10 and the access gateway device 30 constructed in the access management unit 22 and the communication guarantee time determination unit 31 of the access gateway device 30 to transmit / receive the mobile communication device 10. The data packet to be transferred is transferred.

  Subsequently, a flow of processing operations of the entire mobile communication system according to the first exemplary embodiment of the present invention will be described with reference to FIG. FIG. 4 shows an operation in which the mobile communication device 11 transitioning to the sleep state tries to reconstruct a bearer for the access device 20 that consumes a large amount of radio resources by the mobile communication device 10. In the operation of FIG. 4, it is assumed that the mobile communication device 10 keeps the bearer longer than the communication guaranteed time set in the access device 20.

  First, the mobile communication device 10 performs data communication using a bearer set between the mobile communication device 10 and the mobile anchor device 40 (S1). Next, in order to start data communication via the access device 20, the mobile communication device 11 transmits a bearer reconfiguration request message to the C-plane function unit 32, and the mobile communication device 11 and the access gateway device Attempt to reconstruct bearer between 30 (S2).

  Next, when receiving the bearer reconfiguration request message, the C-plane function unit 32 transmits a radio bearer generation request message to the access device 20 in order to secure a bearer for the mobile communication device 11 (S3). Here, when receiving the radio bearer generation request message, the access device 20 determines whether or not radio resources can be allocated to the mobile communication device 11. In this figure, since it is assumed that the mobile communication device 10 consumes a large amount of radio resources of the access device 20, the access device 20 cannot allocate radio resources to the mobile communication device 11. Is determined. Furthermore, in this figure, the mobile communication device 10 maintains a bearer longer than the communication guarantee time. In this case, the access device 20 transmits a radio bearer release request message to the C-plane function unit 32 in order to release the radio bearer of the mobile communication device 10 (S4).

  When receiving the radio bearer release request message, the C-plane function unit 32 transmits a bearer release command message to the U-plane function unit 33 so as to release the bearer between the access device 20 and the mobile anchor device 40. (S5). Further, the C-plane function unit 32 transmits a radio bearer release command message to the access device 20 so as to release the radio bearer between the mobile communication device 10 and the access device 20 (S6).

  When receiving the radio bearer release message, the access device 20 performs a radio bearer release process set between the mobile communication device 10 and the access device 20 (S7). Here, the access device 20 may notify the mobile communication device 10 of the access waiting time when performing the release process of the radio bearer set with the mobile communication device 10. The access waiting time is the time that the mobile communication device 10 must wait after the radio bearer is released before attempting to access again. By notifying the mobile communication device 10 of the access waiting time from the access device 20, it is possible to limit the mobile communication device 10 that has been disconnected from the radio bearer from attempting to connect immediately. Thereby, the processing load of the access device 20 due to an excessive connection request from the mobile communication device 10 can be reduced.

  Next, the access device 20 transmits a radio bearer release response message to the C-plane function unit 32 (S8). Next, the access device 20 releases the radio bearer with the mobile communication device 10 and generates a radio bearer with the mobile communication device 11 using the free radio resources (S9). When the access device 20 generates a radio bearer with the mobile communication device 11, the access device 20 transmits a radio bearer generation response message to the C-plane function unit 32 (S10). When receiving the radio bearer generation response message, the C-plane function unit 32 generates a bearer between the access device 20 and the mobile anchor device 40 (S11).

  When completing the bearer generation between the mobile communication device 11 and the mobile anchor device 40, the C-plane function unit 32 transmits a bearer reconfiguration response message to the mobile communication device 11 (S12).

  Next, a flow of processing when the access device 20 according to the first embodiment of the present invention receives a radio bearer generation request message will be described with reference to FIG. First, the access device 20 receives a radio bearer generation request message from the C-plane function unit 32 (S21). Next, the radio resource management unit 21 determines whether or not the requested radio bearer can be generated using the free resource (S22). When the radio resource management unit 21 determines that a radio bearer can be generated, the access management unit 22 performs a radio bearer generation process (S23).

  If it is determined in step S22 that a radio bearer cannot be generated, the access management unit 22 confirms whether or not there is a bearer that has been continued for longer than the communication guarantee time (S24). When the access management unit 22 determines that there is no bearer that has been continued longer than the communication guarantee time, the access management unit 22 notifies the C-plane function unit 32 that a radio bearer cannot be generated with the mobile communication device 11. (S25). In step S24, when it is determined that there is a radio bearer that has been continued for longer than the communication guarantee time, the access management unit 22 executes a process of releasing the radio bearer with the corresponding mobile communication device (S26). . In this case, the access management unit 22 may release the radio bearer having the longest communication duration when there are a plurality of radio bearers that have been continued for longer than the communication guarantee time. After step S26, the processes after step S22 are repeated.

  In FIG. 5, when there is a radio bearer that has been continued for longer than the communication guarantee time, it is determined again whether or not the newly requested bearer can be accepted after actually releasing the bearer. It may be determined that a newly requested bearer can be accepted by releasing a bearer that has continued for longer than the communication guarantee time, and then a bearer that has continued for longer than the communication guarantee time may be released. .

  In step S25, the C-plane function unit 32 that has received the notification that the radio bearer cannot be generated rejects the bearer reconfiguration request in response to the bearer reconfiguration request message from the mobile communication device 11. Notify that. In this case, the C-plane function unit 32 may notify the mobile communication device 11 of the access waiting time together with information indicating that the bearer reconfiguration request is rejected. Furthermore, from the access waiting time notified to the mobile communication device 10 when releasing the radio bearer in step S7 of FIG. 4, the mobile communication device 10 from the C-plane function unit 32 after step S25 of FIG. The access waiting time notified to may be shortened. In this way, a mobile communication device that is not performing communication can preferentially try to start communication.

  As described above, by using the mobile communication system according to the first embodiment of the present invention, the access gateway device 30 that is a host device of the access device 20 communicates with the mobile communication device 10 that performs radio communication with the access device 20. Guarantee time can be determined. As a result, even when the mobile communication device 10 moves and is connected to an access device other than the access device 20, the access gateway device 30 that is the host device holds information related to the communication guarantee time. Therefore, the new access device can receive the communication guarantee time related to the mobile communication device 10 that has moved to the management area of the new access device from the access gateway device 30.

(Embodiment 2)
Next, the flow of processing when receiving a radio bearer generation request message in the access device 20 according to the first embodiment of the present invention will be described with reference to FIG. Steps S31 to S33 perform the same processing as steps S21 to S23 in FIG. If it is determined in step S32 that the requested radio bearer cannot be generated using the free radio resource, the access management unit 22 determines whether the bearer set with the plurality of mobile communication devices In addition, it is determined whether there is a radio bearer with a priority lower than a predetermined reference.

  When the access management unit determines that there is a radio bearer set with a priority lower than a predetermined reference, the access management unit executes processing for releasing the corresponding radio bearer (S37). The process after step S37 repeats the process after step S32.

  In step S34, when the access management unit determines that there is no radio bearer set with a priority lower than a predetermined reference, the access management unit determines whether there is a radio bearer that has been continued for a longer period than the communication guarantee time. . Since the process after step S35 is the same as the process after step S24 in FIG. 5, detailed description is abbreviate | omitted.

  As described above, radio bearer allocation control is performed in consideration of the priority between radio bearers by using the processing flow when the radio bearer generation request message is received in the access device 20 according to the second embodiment of the present invention. be able to.

(Embodiment 3)
Then, the structural example of the mobile communication system concerning Embodiment 3 of this invention is demonstrated using FIG. The mobile communication system in this figure includes mobile communication devices 50 and 51, an eNodeB 60, an MME 70, a Serving GW 80, and a PDN GW 90. The mobile communication system in this figure shows a configuration example when LTE is used as a radio access method. The mobile communication devices 50 and 51 are the same as the mobile communication devices 10 and 11 in FIG. The eNodeB 60 corresponds to the access device 20 in FIG. The MME 70 corresponds to the C-plane function unit 32 in FIG. The Serving GW 80 corresponds to the U-plane function unit 33 in FIG. The PDN GW 90 corresponds to the mobile anchor device 40 in FIG.

  In FIG. 2, the C-plane function unit 32 and the U-plane function unit 33 are provided in the access gateway device 30, but in FIG. 2, the same function as the C-plane function unit 32 is the MME 70. The same function as the U-plane function unit 33 is installed in the Serving GW 80.

  The eNodeB 60 includes a radio resource management unit 61, and the MME 70 includes a communication guaranteed time determination unit 71.

  Then, the flow of the whole operation | movement of the mobile communication system concerning Embodiment 1 of this invention is demonstrated using FIG. In this figure, as in FIG. 4, the mobile communication device 11 that has transitioned to the sleep state tries to reconstruct the bearer for the eNodeB 60 that consumes a large amount of radio resources by the mobile communication device 10. Is shown. In the operation of this figure, it is assumed that the mobile communication device 10 keeps the bearer longer than the guaranteed communication time set in the eNodeB 60.

  First, the mobile communication device 10 performs data communication using a bearer set between the mobile communication device 10 and the PDN GW 90 (S21). Next, the mobile communication device 11 transmits a Service Request message to the MME 70 in order to start data communication via the eNodeB 60 (S22). Thereby, the mobile communication device 11 tries to reconstruct a bearer with the Serving GW 80.

  Next, when the MME 70 receives the Service Request message, the MME 70 transmits an Initial Context Setup Request message to the eNodeB 60 in order to secure a bearer for the mobile communication device 11 (S23). Here, when the eNodeB 60 receives the Initial Context Setup Request message, the eNodeB 60 determines whether or not radio resources can be allocated to the mobile communication device 11. In this figure, since it is a premise that the mobile communication device 10 is consuming a large amount of radio resources of the eNodeB 60, the eNodeB 60 determines that radio resources cannot be allocated to the mobile communication device 11. Furthermore, in this figure, the mobile communication device 10 maintains a bearer longer than the communication guarantee time. In this case, the eNodeB 60 transmits an S1 UE Context Release Request message to the MME 70 in order to release the radio bearer of the mobile communication device 10 (S24).

  When the MME 70 receives the S1 UE Context Release Request message, the MME 70 transmits a Release Access Bearer Request / Response message to the Serving GW 80 so as to release the bearer between the eNodeB 60 and the PDN GW 90 (S25). Further, the MME 70 transmits an S1 UE Context Release Command message to the eNodeB 60 so as to release the radio bearer between the mobile communication device 10 and the eNodeB 60 (S26).

  When the eNodeB 60 receives the S1 UE Context Release Command message, the eNodeB 60 performs a radio bearer release process (RRC Connection Release) set between the mobile communication device 10 and the eNodeB 60 (S27). Here, the eNodeB 60 may notify the mobile communication device 10 of the access waiting time when performing the release process of the radio bearer set with the mobile communication device 10.

  Next, the eNodeB 60 transmits an S1 UE Context Release Complete message to the MME 70 (S28). Next, the eNodeB 60 releases the radio bearer with the mobile communication device 10 and performs generation processing (Radio Bearer Establishment) with the mobile communication device 11 using the free radio resource (S29). . When the eNodeB 60 generates a radio bearer with the mobile communication device 11, the eNodeB 60 transmits an Initial Context Setup Complete message to the MME 70 (S30). When the MME 70 receives the Initial Context Setup Complete message, the MME 70 transmits a Modify Bearer Request / Response message to the Serving GW 80 in order to generate a bearer between the eNodeB 60 and the PDN GW 90 (S31).

  As described above, even in a mobile communication system using LTE as a radio access method, communication opportunities can be equally provided to a plurality of mobile communication devices, as in the first embodiment of the present invention.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. For example, also in the third embodiment of the present invention, the processing using the priority described in the second embodiment may be performed.

  For example, in the above-described embodiment, the hardware configuration has been described. However, the present invention is not limited to this, and the processing in FIG. 5 is realized by causing a CPU (Central Processing Unit) to execute a computer program. Is also possible. In this case, the computer program can be stored using various types of non-transitory computer readable media and supplied to the computer. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (for example, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (for example, magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W and semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory)) are included. The program may also be supplied to the computer by various types of transitory computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

  (Appendix 1) A mobile communication system comprising a mobile communication device, an access device that performs wireless communication with the mobile communication device, and an access gateway device that controls the access device as a host device of the access device, wherein the access In the state where there is no radio resource to be newly allocated, when a new access request is received from the second mobile communication device, the device can obtain the communication guaranteed time of the first mobile communication device already connected and the first mobile communication device. The mobile communication system which has a radio | wireless resource management part which manages the radio | wireless resource allocated to a said 1st mobile communication apparatus and a said 2nd mobile communication apparatus based on the communication continuation time of one mobile communication apparatus.

  (Supplementary note 2) The access gateway device includes a communication guarantee time determining unit that determines a communication guarantee time in the first mobile communication device when an access request is received from the first mobile communication device. The mobile communication system according to 1.

  (Supplementary note 3) The mobile communication system according to Supplementary note 1 or 2, wherein the guaranteed communication time is determined based on subscriber information of the first mobile communication device.

  (Additional remark 4) When the communication continuation time of the said 1st mobile communication apparatus exceeds the communication guarantee time in the said 1st mobile communication apparatus, the said access apparatus allocates to the said 1st mobile communication apparatus. The mobile communication system according to any one of appendices 1 to 3, wherein a released radio resource is released and the released radio resource is allocated to the second mobile communication device.

  (Additional remark 5) The said access apparatus is with respect to a said 2nd mobile communication apparatus, when the communication continuation time of a said 1st mobile communication apparatus is not over the communication guarantee time in a said 1st mobile communication apparatus. The mobile communication system according to any one of appendices 1 to 4, wherein a message for rejecting connection is transmitted.

  (Supplementary Note 6) When the access device releases a radio resource allocated to the first mobile communication device, a first time that defines a time until the next access by the first mobile communication device is defined next. The mobile communication system according to appendix 4, wherein information regarding access waiting time is notified to the first mobile communication device.

  (Supplementary Note 7) When the access device transmits a message rejecting the connection to the second mobile communication device, the access device defines a time until the second mobile communication device accesses next time. 6. The mobile communication system according to appendix 5, wherein the second mobile communication device is notified of information related to the access waiting time.

  (Supplementary note 8) The mobile communication system according to supplementary note 7, wherein the access device sets the first access waiting time and the second access waiting time to different times.

  (Supplementary note 9) The mobile communication system according to supplementary note 8, wherein the access device sets the second access waiting time to be shorter than the first access waiting time.

  (Additional remark 10) When the said access apparatus cancels | releases the connection with the access apparatus currently connected by the said 1st mobile communication apparatus moving, and connects with another access apparatus, with respect to the said other access apparatus The mobile communication system according to any one of appendices 1 to 9, wherein the communication duration of the first mobile communication device is transmitted.

  (Supplementary Note 11) The access device generates a communication path with the mobile communication device for which the access request is made by allocating radio resources to the mobile communication device for which the access request is made. The mobile communication system according to any one of the above.

  (Supplementary note 12) The mobile communication system according to Supplementary note 11, wherein the guaranteed communication time is determined for each communication path set by the access device.

  (Additional remark 13) When it is an access apparatus provided between a mobile communication apparatus and the access gateway apparatus which is a high-order apparatus, and there is no radio resource newly allocated, when there is a new access request from a mobile communication apparatus The newly requested access based on the communication guaranteed time determined in the access gateway device of the already connected mobile communication device and the communication continuation time of the already connected mobile communication device An access device comprising: a radio resource management unit that manages radio resources to be allocated to a communication device and the already connected mobile communication device.

  (Supplementary Note 14) In the state where there is no newly allocated radio resource, when there is a new access request from the mobile communication device, the communication guaranteed time determined in the access gateway device of the already connected mobile communication device; Adjusting a radio resource allocated to the mobile communication device that has newly made an access request and the already connected mobile communication device based on the communication duration of the already connected mobile communication device. A radio resource management method provided.

  (Supplementary Note 15) In a state where there is no radio resource to be newly allocated, when there is a new access request from the mobile communication device, a communication guaranteed time determined in the access gateway device of the already connected mobile communication device; Adjusting a radio resource allocated to the mobile communication device that has newly made an access request and the already connected mobile communication device based on the communication duration of the already connected mobile communication device. A program to be executed by a computer.

DESCRIPTION OF SYMBOLS 10 Mobile communication apparatus 11 Mobile communication apparatus 20 Access apparatus 21 Radio | wireless resource management part 22 Access management part 23 Packet transfer part 30 Access gateway apparatus 31 Communication guarantee time determination part 32 C-plane function part 33 U-plane function part 40 Mobile anchor apparatus 50 Mobile communication device 51 Mobile communication device 60 eNodeB
70 MME
80 Serving GW
90 PDN GW

Claims (10)

A mobile communication system comprising: a mobile communication device; an access device that performs wireless communication with the mobile communication device; and an access gateway device that controls the access device as a host device of the access device,
The access device is:
In a state where there is no radio resource to be newly allocated, when there is a new access request from the second mobile communication device, the communication guaranteed time of the already connected first mobile communication device and the first mobile communication A mobile communication system comprising: a radio resource management unit that manages radio resources allocated to the first mobile communication device and the second mobile communication device based on a communication duration of the device. The access gateway device is:
The mobile communication system according to claim 1, further comprising a communication guarantee time determining unit that determines a communication guarantee time in the first mobile communication device when an access request is received from the first mobile communication device. The communication guarantee time is
The mobile communication system according to claim 1, wherein the mobile communication system is determined based on subscriber information of the first mobile communication device. The access device is:
When the communication continuation time of the first mobile communication device exceeds the communication guarantee time in the first mobile communication device, the radio resources allocated to the first mobile communication device are released, and the first mobile communication device The mobile communication system according to any one of claims 1 to 3, wherein the released radio resource is allocated to two mobile communication devices. The access device is:
If the communication duration of the first mobile communication device does not exceed the communication guarantee time in the first mobile communication device, a message for rejecting the connection is sent to the second mobile communication device; The mobile communication system according to any one of claims 1 to 4. The access device is:
When the radio resource allocated to the first mobile communication device is released, the first access waiting time information defining the time until the first mobile communication device accesses the next time is first The mobile communication system according to claim 4, wherein the mobile communication device is notified. The access device is:
When transmitting a message rejecting the connection to the second mobile communication device, information on the second access waiting time defining the time until the second mobile communication device accesses next time The mobile communication system according to claim 5, which notifies a second mobile communication device. An access device provided between a mobile communication device and an access gateway device that is a host device,
When there is no newly allocated radio resource and there is a new access request from the mobile communication device, the communication guarantee time of the already connected mobile communication device and the communication continuation of the already connected mobile communication device An access apparatus comprising: a radio resource management unit that manages radio resources allocated to the mobile communication apparatus that newly requests access and the mobile communication apparatus that is already connected based on time.   When there is no newly allocated radio resource and there is a new access request from the mobile communication device, the communication guarantee time of the already connected mobile communication device and the communication continuation of the already connected mobile communication device A radio resource management method comprising a step of adjusting radio resources to be allocated to the newly made mobile communication device and the already connected mobile communication device based on time.   When there is no newly allocated radio resource and there is a new access request from the mobile communication device, the communication guarantee time of the already connected mobile communication device and the communication continuation of the already connected mobile communication device A program that causes a computer to execute a step of adjusting radio resources to be allocated to the mobile communication device that has newly made an access request and the already connected mobile communication device based on time.

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