The present disclosure relates to core nodes, base stations, radio terminals, communication methods, radio resource allocation methods, base station selection methods, and programs, and in particular, core nodes, base stations, radio terminals, communication methods, and radio resource allocation for allocating radio resources. Regarding methods, base station selection methods, and programs.
Background technology
[0002]
　In recent years, studies on IoT (Internet Of Things) services have been underway. For the IoT service, many terminals (hereinafter referred to as IoT terminals) that autonomously execute communication without requiring user operation are used. As a result, in order to provide IoT services using many IoT terminals, it is desired to efficiently accommodate many IoT terminals in a network managed by a telecommunications carrier or the like.
[0003]
　Page 11 of Non-Patent Document 1 describes a method of managing radio resources allocated to terminals. Specifically, it is described that a radio resource group having a plurality of radio resources is divided into a plurality of RAN (Radio Access Network) Slices, and each RAN Slice is assigned to a specific service. That is, the wireless terminal used for a specific service is assigned the wireless resource possessed by the predetermined RAN Slice. By allocating RAN Slice to each service in this way, it is possible to prevent wireless resources from being allocated to other services when the number of wireless terminals used for a specific service increases.
Prior art literature
Non-patent literature
[0004]
Non-Patent Document 1: Vision on 5G Radio Access Technologies, Huawei Technologies, 3GPP RAN workshop on 5G, Sept.17-18, 2015, Phoenix, USA, RWS-150006
Outline of the invention
Problems to be solved by the invention
[0005]
　However, although Non-Patent Document 1 describes that a wireless resource group is divided into a plurality of RAN Slices and managed, there is no description on how to allocate wireless resources to wireless terminals. .. That is, a wireless resource allocation method has not been established for a wireless terminal used for a specific service. The radio resource allocation method is a method of allocating RAN Slice radio resources allocated for a specific service to a radio terminal. Therefore, there is a problem that the wireless resources of RAN Slice, which are divided and managed, cannot be allocated to appropriate wireless terminals.
[0006]
　An object of the present disclosure is a core node, a base station, a wireless terminal, a communication method, a wireless resource allocation method, which can appropriately allocate the RAN Slice radio resource allocated for each service to a wireless terminal using the service. The purpose is to provide a base station selection method and a program.
Means to solve problems
[0007]
　The core node according to the first aspect of the present disclosure is a decision unit that determines the radio resource to be allocated according to the service provided to the radio terminal, and a base that manages a plurality of radio resources for each RAN Slice associated with the service. It is provided with a communication unit for transmitting resource identification information indicating a radio resource determined by the determination unit to the station.
[0008]
　The base station according to the second aspect of the present disclosure depends on the management unit that manages a plurality of wireless resources for each RAN Slice associated with the service and the service provided to the wireless terminal transmitted from the core node. It includes a communication unit that receives resource identification information indicating the radio resource to be allocated, and a resource allocation unit that allocates the radio resource indicated by the resource identification information to the radio terminal.
[0009]
　The wireless terminal according to the third aspect of the present disclosure includes a receiving unit that receives each notification information transmitted by a plurality of base stations, and a RAN that provides a service used by the own terminal from the plurality of base stations. It includes a determination unit that determines to connect to a base station that has transmitted broadcast information including RAN Slice identification information indicating Slice.
[0010]
　The communication method for the fourth terminal of the present disclosure determines the wireless resources to be allocated according to the service provided to the wireless terminal, and manages a plurality of wireless resources for each RAN Slice associated with the service to the base station. , The resource identification information indicating the determined radio resource is transmitted.
[0011]
　The radio resource allocation method according to the fifth aspect of the present disclosure manages a plurality of radio resources for each RAN Slice associated with the service, and allocates the radio resources according to the service provided to the radio terminal transmitted from the core node. It receives resource identification information indicating a radio resource and allocates the radio resource indicated in the resource identification information to the radio terminal.
[0012]
　The base station selection method according to the sixth aspect of the present disclosure is a RAN indicating a RAN Slice that receives each broadcast information transmitted by a plurality of base stations and provides a service to be used from the plurality of base stations. It determines to connect to the base station that has transmitted the broadcast information including the Slice identification information.
[0013]
　The program according to the seventh aspect of the present disclosure determines the radio resources to be allocated according to the service provided to the radio terminal, and manages a plurality of radio resources for each RAN Slice associated with the service to the base station. It causes a computer to transmit resource identification information indicating a determined radio resource.
The invention's effect
[0014]
　According to the present disclosure, core nodes, base stations, wireless terminals, communication methods, wireless resource allocation methods, and base stations that can appropriately allocate RAN Slice wireless resources allocated for each service to wireless terminals that use the service. A selection method and a program can be provided.
A brief description of the drawing
[0015]
FIG. 1 is a configuration diagram of a communication system according to a first embodiment.
FIG. 2 is a configuration diagram of a communication system according to a second embodiment.
FIG. 3 is a configuration diagram of a UE according to a second embodiment.
FIG. 4 is a configuration diagram of a radio resource managed by eNodeB according to the second embodiment.
FIG. 5 is a diagram showing information managed in each node device according to the second embodiment.
FIG. 6 is a diagram showing a flow of an Attach procedure according to a second embodiment.
FIG. 7 is a diagram showing a flow of an Attach procedure according to a second embodiment.
FIG. 8 is a diagram showing a flow of a UE triggered service request procedure according to the second embodiment.
FIG. 9 is a diagram showing a flow of a UE triggered service request procedure according to the second embodiment.
FIG. 10 is a diagram showing a flow of an Attach procedure according to a third embodiment.
FIG. 11 is a diagram showing a flow of a UE triggered service request procedure according to the third embodiment.
FIG. 12 is a configuration diagram of a communication system according to a fourth embodiment.
FIG. 13 is a diagram showing a flow of a Combined GPRS / IMSI Attach Procedure according to the fourth embodiment.
FIG. 14 is a diagram showing a flow of the PDP Context Activation Procedure for Iu mode according to the fourth embodiment.
FIG. 15 is a diagram showing a flow of the PDP Context Activation Procedure for Iu mode according to the fourth embodiment.
FIG. 16 is a diagram showing a flow of MS Initiated Service Request Procedure using GN / Gp according to the fourth embodiment.
FIG. 17 is a diagram showing a flow of MS Initiated Service Request Procedure using GN / Gp according to the fourth embodiment.
FIG. 18 is a diagram showing a flow of the PDP Context Activation Procedure for Iu mode according to the fifth embodiment.
FIG. 19 is a diagram showing a flow of MS Initiated Service Request Procedure using GN / Gp according to the fifth embodiment.
FIG. 20 is a configuration diagram of a base station according to each embodiment.
FIG. 21 is a configuration diagram of a wireless terminal according to each embodiment.
FIG. 22 is a configuration diagram of a core node according to each embodiment.
Mode for carrying out the invention
[0016]
　(Embodiment 1)
　Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. A configuration example of the communication system according to the first embodiment of the present disclosure will be described with reference to FIG. FIG. 1 has a core node 10, a base station 20, and a wireless terminal 30. The core node 10, the base station 20, and the wireless terminal 30 may be computer devices operated by the processor executing a program stored in the memory.
[0017]
　The core node 10 may be an MME (Mobility Management Entity) or an SGSN (Serving General Packet Radio Service Support Node) defined as a node that performs session management and mobility management in 3GPP (3rd Generation Partnership Project). The base station 20 may be an eNodeB (evolved Node B) specified in 3GPP. eNodeB is a base station that supports LTE (Long Term Evolution) as a wireless communication system. Further, the base station 20 may be replaced with RNC (Radio Network Controller) and NodeB defined as devices for controlling the base station in 3GPP.
[0018]
　The wireless terminal 30 may be a mobile phone terminal, a smartphone terminal, a tablet terminal, or the like. Alternatively, the wireless terminal 30 may be an IoT terminal, an MTC (Machine Type Communication) terminal, an M2M (Machine to Machine) terminal, or the like.
[0019]
　Subsequently, a configuration example of the core node 10 will be described. The core node 10 has a communication unit 12 and a determination unit 14. The components constituting the core node 10 such as the communication unit 12 and the determination unit 14 may be software or a module whose processing is executed by the processor executing a program stored in the memory. Alternatively, the component constituting the core node 10 may be hardware such as a circuit or a chip. Further, the communication unit 12 includes a transmitter unit (Transmitter) and a receiver unit (Receiver).
[0020]
　The determination unit 14 determines the wireless resource to be allocated to the wireless terminal 30 by using the service information indicating the service provided to the wireless terminal 30. The radio resource may be, for example, a resource managed by the base station 20. The radio resource may be a resource defined using at least one of frequency and time.
[0021]
　The service provided to the wireless terminal 30 may be, for example, a voice service that provides a voice call, a data service that transmits image data or text data, or a broadcast distribution service that distributes data all at once. good. Alternatively, the service provided to the wireless terminal 30 may be an IoT service. The IoT service may be, for example, a service using a smart meter, an automatic driving service, or the like. The service shown as the service provided to the wireless terminal 30 is not limited to the service shown above, and various services may be provided to the wireless terminal 30. The service information is information that identifies the service provided to the wireless terminal 30.
[0022]
　The communication unit 12 transmits resource identification information indicating the radio resource determined by the determination unit 14 to the base station 20 that divides the radio resource group having the plurality of radio resources into a plurality of RAN Slices and manages the radio resource group. Each RAN Slice has some radio resources included in the radio resource group. Each RAN Slice has at least one radio resource. One radio resource may be, for example, a resource specified using a specific frequency band and a specific period. The RAN Slice may be paraphrased as having a region in which a plurality of radio resources are combined. Further, the RAN Slice may be paraphrased as having a part of the radio resource group among the radio resource group managed by the base station 20. RAN Slice is associated with the services it provides to wireless terminals. That is, the RAN Slice has at least one radio resource allocated to a radio terminal that uses a particular service.
[0023]
　The resource identification information is information for identifying a radio resource managed by the base station 20, and is information for identifying at least one radio resource. Further, the communication unit 12 transmits the resource identification information indicating the radio resource included in the RAN Slice associated with the service provided to the radio terminal 30 to the base station 20.
[0024]
　Subsequently, a configuration example of the base station 20 will be described. The base station 20 has a communication unit 22, a management unit 24, and a resource allocation unit 26. The components constituting the base station 20 such as the communication unit 22, the management unit 24, and the resource allocation unit 26 are software or modules whose processing is executed by the processor executing a program stored in the memory. May be good. Alternatively, the component constituting the base station 20 may be hardware such as a circuit or a chip. Further, the communication unit 22 includes a transmitter unit (Transmitter) and a receiver unit (Receiver).
[0025]
　The management unit 24 manages a radio resource group having a plurality of radio resources by dividing the radio resource group into a plurality of RAN Slices. The communication unit 22 receives the resource identification information transmitted from the core node 10 indicating the wireless resource to be allocated to the wireless terminal 30. The resource identification information indicates a radio resource included in the RAN Slice associated with the service provided to the radio terminal 30.
[0026]
　The resource allocation unit 26 allocates the wireless resource indicated in the resource identification information to the wireless terminal 30.
[0027]
　As described above, by using the communication system of FIG. 1, the core node 10 allocates the radio resources to be allocated to the radio terminal 30 to the base station 20 that manages the radio resource group by dividing it into a plurality of RAN Slices. The indicated resource identification information can be transmitted. As a result, the base station 20 can allocate the radio resource specified by the core node 10 to the radio terminal 30. The core node 10 can determine the wireless resource to be allocated to the wireless terminal 30 based on the service used by the wireless terminal 30. Therefore, the base station 20 can appropriately allocate the wireless resources of the RAN Slice associated with the service used by the wireless terminal 30 to the wireless terminal 30.
[0028]
　(Embodiment 2)
　Subsequently, a configuration example of the communication system according to the second embodiment of the present disclosure will be described with reference to FIG. The communication system of FIG. 2 is a communication system that supports LTE as a wireless communication system, and is a communication system defined as EPS (Evolved Packet System) in 3GPP. Figure 2 is based on the figure of TS 23.401 V 13.5.0 Figure 4.2.1-1.
[0029]
　The communication system of FIG. 2 includes a UE (User Equipment) 40, an E-UTRAN (Evolved-Universal Mobile Telecommunications System Terrestrial Radio Access Network) 41, an MME 42, an HSS (Home Subscriber Server) 43, an SGSN 44, and an SGW (Serving Gateway) 45. PGW (Packet Data Network Gateway) 46, PCRF (Policy and Charging Rules Function) entity 47 (hereinafter referred to as PCRF47), UTRAN48, GERAN (GSM (registered trademark) (Global System for Mobile communications) EDGE (Enhanced Data Rates for Global) It has Evolution) Radio Access Network) 49 and Operator's IP Services 50.
[0030]
　UE40 is a term used as a general term for wireless terminals in 3GPP. The UE may be replaced with, for example, an MS (Mobile Station). E-UTRAN41 is a RAN (Radio Access Network) that uses LTE as a wireless access system. UTRAN48 is a RAN that uses a 3G wireless system as a wireless access system. GERAN49 is a RAN that uses a 2G wireless system as a wireless access system.
[0031]
　The MME 42 and SGSN 44 are nodes that execute mobility management, session management, and the like related to the UE 40. The HSS 43 is a node that manages subscriber information regarding the UE 40. The subscriber information includes information about the service used by the UE 40. The SGW 45 and PGW 46 are nodes that relay data transmitted between the UE 40 and the Operator's IP Services 50. The Operator's IP Services 50 may be, for example, a server device managed by a business operator or the like that provides a service to the UE 40, or a server device group or the like. PCRF47 is a node that manages policies, billing rules, and the like.
[0032]
　An LTE-Uu reference point is defined between the UE 40 and the E-UTRAN 41. An S1-MME reference point is defined between the E-UTRAN 41 and the MME 42. An S6 reference point is defined between the MME 42 and the HSS 43. An S3 reference point is defined between the MME 42 and the SGSN 44. An S1-U reference point is defined between the E-UTRAN41 and the SGW45. An S11 reference point is defined between the MME 42 and the SGW 45. An S4 reference point is defined between SGSN44 and SGW45. An S12 reference point is defined between SGW45 and UTRAN48. An S5 / S8 reference point is defined between the SGW 45 and the PGW 46. A Gx reference point is defined between PGW46 and PCRF47. An SGi reference point has been established between PGW46 and Operator's IP Services 50. An Rx reference point is defined between PCRF47 and Operator's IP Services 50. An S1-10 reference point is defined between the MME 42 and other MMEs.
[0033]
　Subsequently, a configuration example of the UE 40 will be described with reference to FIG. The UE 40 has a communication unit 71, a RAN Slice availability determination unit 72, and a connection destination RAN Slice selection unit 73. The component constituting the UE 40 may be software or a module whose processing is executed by the processor executing a program stored in the memory. Alternatively, the component constituting the UE 40 may be hardware such as a circuit or a chip.
[0034]
　The communication unit 71 performs wireless communication using eNodeB and LTE included in the E-UTRAN 41. In addition, the communication unit 71 receives the broadcast information transmitted from the eNodeB. The communication unit 71 may receive broadcast information from a plurality of eNodeBs. The broadcast information is transmitted using, for example, BCCH (Broadcast Control Channel). The broadcast information includes at least one RAN Slice ID. The RAN Slice ID is information that identifies the RAN Slice managed by eNodeB. RAN Slice is also a radio resource used to provide a particular service. That is, the UE 40 can recognize the services that the eNodeB can provide by receiving the broadcast information. The communication unit 71 outputs the RAN Slice ID included in the notification information to the RAN Slice availability determination unit 72.
[0035]
　The RAN Slice availability determination unit 72 determines whether or not the RAN Slice ID output from the communication unit 71 includes the RAN Slice associated with the service used by the UE 40. It is assumed that the RAN Slice availability determination unit 72 holds at least one RAN Slice ID indicating the RAN Slice associated with the service used by the UE 40 in advance. The RAN Slice availability determination unit 72 determines whether or not the RAN Slice ID output from the communication unit 71 includes the RAN Slice ID held in advance. The RAN Slice availability determination unit 72 outputs the RAN Slice ID that matches the RAN Slice ID held in advance from the RAN Slice ID output from the communication unit 71 to the connection destination RAN Slice selection unit 73.
[0036]
　When the connection destination RAN Slice selection unit 73 receives a plurality of RAN Slice IDs from the RAN Slice availability determination unit 72, the connection destination RAN Slice selection unit 73 selects the RAN Slice to be used based on a predetermined policy. For example, the connection destination RAN Slice selection unit 73 may select the RAN Slice ID transmitted from the eNodeB having the strongest radio field strength. Alternatively, the connection destination RAN Slice selection unit 73 may set a priority for each RAN Slice ID and select a RAN Slice ID having a higher priority. The connection destination RAN Slice selection unit 73 outputs the selected RAN Slice ID to the communication unit 71. Alternatively, the connection destination RAN Slice selection unit 73 may select the RAN Slice ID related to the specific service to be preferentially used. The specific service is, for example, an IoT service, an automatic driving service, or the like.
[0037]
　The communication unit 71 executes a connection process with the eNodeB having the RAN Slice ID output from the connection destination RAN Slice selection unit 73.
[0038]
　Subsequently, a configuration example of a radio resource managed by the eNodeB of the E-UTRAN 41 according to the second embodiment of the present disclosure will be described with reference to FIG. In FIG. 4, the eNodeB shows that it manages a radio resource group including a plurality of radio resources. Further, FIG. 4 shows that the eNodeB manages the radio resource group by dividing it into RAN Slice # A and RAN Slice # B. Further, in FIG. 4, it is shown that RAN Slice #A is composed of a plurality of radio resource groups assigned to a specific group. The specific group may be, for example, a group that uses the service associated with RAN Slice # A. A particular group may include multiple UEs that utilize the services associated with RAN Slice # A. For example, RAN Slice #A may be a RAN Slice for autonomous driving. Further, the specific group may be an automatic driving service provided by each company. The UE is assigned radio resources included in the radio resource group assigned to the group to which its own device belongs. The radio resource assigned to the UE is identified, for example, by the Resource ID.
[0039]
　Subsequently, the information possessed by the UE 40, the eNodeB, the MME 42, the HSS 43, and the information management device will be described with reference to FIG. The information management device is a device different from the HSS 43 and manages subscriber information. Although the HSS 43 and the information management device are shown as different devices in FIG. 5, the HSS 43 and the information management device may be the same device. In other words, the HSS 43 may have the function of an information management device.
[0040]
　The UE 40 has an IMSI (Internal Mobile Subscriber Identity) and a RAN Slice ID. The IMSI is information that identifies the UE. The RAN Slice ID is information indicating the RAN Slice associated with the service used by the UE 40.
[0041]
　eNodeB manages the RAN Slice ID and the Resource ID in association with each other. The RAN Slice ID is information for identifying the RAN Slice managed by eNodeB. The Resource ID is information that identifies the radio resource to be assigned to the UE 40. The Resource ID is information that is uniquely identified in the eNodeB. One RAN Slice ID is associated with multiple Resource IDs. Further, the eNodeB has a plurality of RAN Slice IDs when managing a plurality of RAN Slices.
[0042]
　The HSS43 manages the IMSI in association with the UE Usage type. The UE Usage type is information that identifies the service used by the UE or the group to which the UE belongs, which is identified by the IMSI. The HSS 43 manages the IMSI and UE Usage type for a plurality of UEs.
[0043]
　The information management device manages the Service ID and the UE Usage type in association with each other. The Service ID is information that identifies the service used by the UE and the group to which the UE belongs. The Service ID is information that is uniquely identified in the communication system. The information management device manages Service IDs and UE Usage types related to a plurality of UEs. When the HSS 43 and the information management device are the same device, the HSS 43 manages the IMSI, the UE Usage type, and the Service ID in association with each other. The service used by the UE is specified by using the Service ID. The Service ID is specified using the UE Usage type. The Service ID may be specified using subscriber information other than the UE Usage type.
[0044]
　The MME 42 manages the Service ID and the Resource ID in association with each other. That is, the MME 42 can specify the Resource ID assigned to the UE in the eNodeB by using the Service ID.
[0045]
　In FIG. 5, the eNodeB manages the radio resource by using the Resource ID uniquely identified in the eNodeB, but manages the radio resource by using the Service ID uniquely identified in the communication system. May be good. In this case, the MME 42 does not need to manage the Service ID and the Resource ID, and can instruct the eNodeB of the radio resource to be assigned to the UE by using the Service ID.
[0046]
　Subsequently, the flow of the Attach procedure according to the second embodiment of the present disclosure will be described with reference to FIG. FIG. 6 shows a processing flow when the Attach procedure is normally completed in the communication system shown in FIG. The Attach procedure shown in Fig. 6 is based on TS23.401 V13.5.0 (2015-12) Figure 5.3.2.1-1: Attach procedure. In the Attach procedure shown in Fig. 6, TS23.401 V13.5.0 (2015-12) Figure 5.3.2.1-1: The same processing as the Attach procedure will not be described in detail.
[0047]
　Further, the UE of FIG. 6 corresponds to the UE 40 of FIG. 2, and the eNodeB of FIG. 6 corresponds to the eNodeB of the E-UTRAN 41 of FIG. The new MME of FIG. 6 corresponds to the MME 42 of FIG. The Old MME / SGSN of FIG. 6 is the MME / SGSN assigned by the UE 40 at the time of the previous attack. In the Attach procedure shown in FIG. 6, for example, the operation when the MME (new MME) different from the MME / SGSN (Old MME / SGSN) assigned at the time of the previous attack is assigned due to the movement of the UE 40 will be described. do. The Serving GW of FIG. 6 corresponds to the SGW 45 of FIG. The PDN GW of FIG. 6 corresponds to the PGW 46 of FIG. The PCRF of FIG. 6 corresponds to the PCRF 47 of FIG. The HSS in FIG. 6 corresponds to the HSS 43 in FIG. Further, although the EIR (Equipment Identity Register) in FIG. 6 is not shown in FIG. 2, it is a node that manages UE identification information (for example, ME (Mobile Equipment) Identity).
[0048]
　Since 1 to 7 in FIG. 6 are the same as the process shown in TS23.401 V13.5.0 (2015-12) Figure 5.3.2.1-1: Attach procedure, detailed description thereof will be omitted. In the processes 1 to 7 in FIG. 6, the authentication process related to the UE is mainly executed.
[0049]
　When the processes 1 to 7 in FIG. 6 are completed, the new MME sends an Update Location Request message to the HSS (8 in FIG. 6). The Update Location Request message contains the UE's IMSI. Since 9 in FIG. 6 and 10 in FIG. 6 are the same as the process shown in TS23.401 V13.5.0 (2015-12) Figure 5.3.2.1-1: Attach procedure, detailed description thereof will be omitted. In the processes of 9 in FIG. 6 and 10 in FIG. 6, a process of deleting information about the UE managed in the Old MME / SGSN is mainly executed.
[0050]
　When the HSS acquires the IMSI of the UE in FIG. 6-8, it identifies the UE Usage type associated with the acquired IMSI. In addition, the HSS obtains the Service ID associated with the identified UE Usage type from the information management device. If the HSS and the information management device are the same device, the HSS uses the identified UE Usage type to further identify the Service ID associated with the identified UE Usage type.
[0051]
　The HSS sends an Update Location Ack message to the new MME (11 in FIG. 6). The Update Location Ack message contains the Service ID.
[0052]
　Since 12 of FIG. 6 to 16 of FIG. 6 are the same as the process shown in TS23.401 V13.5.0 (2015-12) Figure 5.3.2.1-1: Attach procedure, detailed description thereof will be omitted. In 12 to 16 of FIG. 6, a process of establishing a session or bearer used by the UE is mainly executed between the Serving GW and the PDN GW.
[0053]
　When the new MME acquires the Service ID that identifies the service used by the UE and the group to which the UE belongs in FIG. 6-11, the new MME specifies the Resource ID that identifies the radio resource assigned to the UE in the eNodeB. The Resource ID is associated with the Service ID. When the new MME specifies the Resource ID, it sends an Initial Context Setup Request message to the eNodeB (17 in FIG. 6). The Initial Context Setup Request message contains the Resource ID.
[0054]
　Next, the eNodeB determines whether or not the radio resource indicated by the Resource ID transmitted from the new MME can be allocated to the UE. For example, the eNodeB may determine that the radio resource indicated by the Resource ID transmitted from the new MME can be allocated when the radio resource indicated by the Resource ID is not assigned to another UE. When the eNodeB determines that the radio resource indicated by the Resource ID transmitted from the new MME can be allocated to the UE, the eNodeB transmits an RRC Connection Reconfiguration message to the UE (18 in FIG. 6). The RRC Connection Reconfiguration message contains information for identifying the radio resource indicated by the Resource ID transmitted from the new MME. The information for identifying the radio resource may be, for example, frequency and time slot identification information indicating the radio resource. As a result, the UE is notified that the radio resources included in the RAN Slice related to the service to be used can be allocated.
[0055]
　Since 19 to 26 in FIG. 6 are the same as the process shown in TS23.401 V13.5.0 (2015-12) Figure 5.3.2.1-1: Attach procedure, detailed description thereof will be omitted. In 19 to 26 of FIG. 6, a process for notifying the Serving GW of information about the radio bearer established between the UE and the eNodeB is mainly executed.
[0056]
　Subsequently, the flow of the Attach procedure according to the second embodiment of the present disclosure will be described with reference to FIG. 7. FIG. 7 shows a flow of processing when the Attach procedure is not normally completed in the communication system shown in FIG. 1 to 17 in FIG. 7 are the same as those in FIG. 6, and thus the description thereof will be omitted.
[0057]
　Upon receiving the Initial Context Setup Request message including the Resource ID in 17 of FIG. 7, the eNodeB determines whether or not the radio resource indicated by the Resource ID can be allocated to the UE.
[0058]
　In this example, if the eNodeB determines that the radio resource indicated by the Resource ID transmitted from the new MME cannot be allocated to the UE, it sends an Initial Context Setup Response message to the UE without sending an RRC Connection Reconfiguration message to the UE. It is transmitted to the MME (18 in FIG. 7). This Initial Context Setup Response message contains information indicating that radio resources cannot be allocated to the UE.
[0059]
　Next, the new MME transmits an Attach Reject message to the UE via the eNodeB (19 in FIG. 7). The new MME notifies the UE that the Attach procedure has not been completed normally by sending an Attach Reject message to the UE. As a result, the UE is notified that the radio resources included in the RAN Slice related to the service to be used can be allocated.
[0060]
　Subsequently, the flow of the UE triggered Service Request procedure according to the second embodiment of the present disclosure will be described with reference to FIG. FIG. 8 shows a processing flow when the UE triggered Service Request procedure is normally completed in the communication system shown in FIG. The UE triggered service request procedure is, for example, a process executed when the UE starts data transmission or transmission. Assuming that the UE triggered Service Request procedure is executed, it is assumed that the Attach procedure is completed normally and the MME manages the subscriber information regarding the UE.
[0061]
　The UE triggered Service Request procedure shown in FIG. 8 is based on TS23.401 V13.5.0 (2015-12) Figure 5.3.4.1-1: UE triggered Service Request procedure. In the UE triggered Service Request procedure of FIG. 8, TS23.401 V13.5.0 (2015-12) Figure 5.3.4.1-1: The same processing as the UE triggered Service Request procedure will not be described in detail.
[0062]
　First, the UE sends a NAS Service Request message to the MME via the eNodeB (1 in FIG. 8 and 2 in FIG. 8). The MME uses the subscriber information about the UE to identify the Service ID associated with the UE. Next, the authentication process related to the UE is executed between the UE and the MME, and further between the MME and the HSS (3 in FIG. 8).
[0063]
　Next, the MME sends an S1-AP: Initial Context Setup Request message including the Resource ID associated with the specified Service ID to the eNodeB (4 in FIG. 8).
[0064]
　Next, the eNodeB determines whether or not the radio resource indicated by the Resource ID transmitted from the MME can be allocated to the UE. When the eNodeB determines that the radio resource indicated by the Resource ID transmitted from the new MME can be allocated to the UE, the eNodeB performs the Radio Bearer Establishment process in order to allocate the radio resource indicated by the Resource ID to the UE (FIG. 8). 5). Since the processing after 6 in FIG. 8 is the same as TS23.401 V13.5.0 (2015-12) Figure 5.3.4.1-1: UE triggered Service Request procedure, detailed description will be omitted. In the processes after 6 in FIG. 8, the process for notifying the Serving GW and the PDN GW of the information regarding the radio bearer established between the UE and the eNodeB is mainly executed.
[0065]
　Subsequently, the flow of the UE triggered Service Request procedure according to the second embodiment of the present disclosure will be described with reference to FIG. FIG. 9 shows a processing flow when the UE triggered service request procedure is not normally completed in the communication system shown in FIG. 1 to 9 of FIG. 9 are the same as those of FIG. 8, and the description thereof will be omitted.
[0066]
　Upon receiving the S1-AP: Initial Context Setup Request message including the Resource ID in FIG. 9-4, the eNodeB determines whether or not the radio resource indicated by the Resource ID can be assigned to the UE.
[0067]
　In this example, if the eNodeB determines that the radio resource indicated by the Resource ID transmitted from the MME cannot be allocated to the UE, it issues an S1-AP: Initial Context Setup Response message without executing the Radio Bearer Establishment process. It is transmitted to the MME (5 in FIG. 9). The S1-AP: Initial Context Setup Response message contains information indicating that radio resources cannot be allocated to the UE.
[0068]
　Next, the MME sends a NAS: Service Reject message to the UE via the eNodeB (6 in FIG. 9). The MME notifies the UE that the UE triggered Service Request procedure has not been completed normally by sending a NAS: Service Reject message to the UE.
[0069]
　As described above, by using the communication system according to the second embodiment of the present disclosure, the MME can specify the radio resource to be allocated to the UE based on the service used by the UE and the group to which the UE belongs. Specifically, the MME can identify the radio resource included in the RAN Slice associated with the service used by the UE. As a result, the eNodeB can allocate the radio resources included in the RAN Slice to the UE that uses the service associated with the RAN Slice. As a result, the eNodeB can prevent the radio resource included in the RAN Slice associated with the service different from the service used by the UE from being allocated to the UE.
[0070]
　Further, the MME can specify the radio resource to be assigned to the UE by using the Service ID that identifies the group to which the UE belongs. As a result, when the RAN Slice is composed of a group of radio resources assigned to a plurality of specific groups, it is possible to prevent the radio resources assigned to a group different from the group to which the UE belongs from being allocated to the UE.
[0071]
　Further, the eNodeB can determine whether or not the radio resource included in the Resource ID specified by the MME can be allocated to the UE. As a result, when the UE is notified by the eNodeB that the radio resource cannot be allocated, the UE reselects another eNodeB that provides the service used by the UE and has the available radio resource. be able to.
[0072]
　(Embodiment 3)
　Subsequently, a process flow when the Attach procedure according to the third embodiment of the present disclosure is normally completed will be described. Here, processing different from the processing flow in FIG. 6 will be mainly described. In the second embodiment, the eNodeB determines whether or not the radio resource indicated by the Resource ID can be allocated to the UE. On the other hand, in the third embodiment, the MME determines whether or not the radio resource indicated by the Resource ID can be allocated to the UE.
[0073]
　It is assumed that the eNodeB periodically transmits the allocation status of the radio resource to the MME. That is, it is assumed that the MME holds the allocation status of the radio resource of the eNodeB. In this case, when the new MME receives the Update Location Ack message including the Service ID in 11 of FIG. 6, it determines whether or not the Resource ID associated with the Service ID can be assigned to the UE. When the new MME determines that the radio resource can be allocated to the UE, the new MME executes the processes after 12 in FIG. However, unlike the second embodiment, the eNodeB does not execute the process of determining whether or not the wireless resource can be allocated to the UE when the Initial Context Setup Request message is received in 17 of FIG.
[0074]
　Subsequently, with reference to FIG. 10, a processing flow when the Attach procedure according to the third embodiment of the present disclosure is not normally completed will be described. 1 to 11 of FIG. 10 are the same as those of 1 to 11 of FIG. 6, and thus the description thereof will be omitted.
[0075]
　Upon receiving the Update Location Ack message including the Service ID in 11 of FIG. 10, the new MME determines whether or not the Resource ID associated with the Service ID can be assigned to the UE. When the new MME determines that the radio resource cannot be allocated to the UE, it transmits an Attach Reject message to the UE via the eNodeB without executing the processes after 12 in FIG. 6 (12 in FIG. 10). .. The new MME notifies the UE that the Attach procedure has not been completed normally by sending an Attach Reject message to the UE.
[0076]
　Subsequently, a process flow when the UE triggered Service Request procedure according to the third embodiment of the present disclosure is normally completed will be described. Here, processing different from the processing flow in FIG. 8 will be mainly described. In the second embodiment, the eNodeB determines whether or not the radio resource indicated by the Resource ID can be allocated to the UE. On the other hand, in the third embodiment, the MME determines whether or not the radio resource indicated by the Resource ID can be allocated to the UE.
[0077]
　It is assumed that the eNodeB periodically transmits the allocation status of the radio resource to the MME. That is, it is assumed that the MME holds the allocation status of the radio resource of the eNodeB.
[0078]
　In this case, when the MME receives the NAS: Service Request message in FIG. 8-2, the MME identifies the Service ID using the subscriber information about the UE, and further identifies the Resource ID associated with the Service ID. The MME determines whether or not the radio resource indicated by the Resource ID can be allocated to the UE. When the MME determines that the radio resource can be allocated to the UE, the MME executes the processes after 4 in FIG. However, unlike the second embodiment, the eNodeB performs a process of determining whether or not the radio resource can be allocated to the UE when the S1-AP: Initial Context Setup Request message is received in 4 of FIG. Do not execute.
[0079]
　Subsequently, the flow of processing when the UE triggered Service Request procedure according to the third embodiment of the present disclosure is not completed normally will be described with reference to FIG. Since 1 to 11 of FIG. 11 are the same as those of 1 to 3 of FIG. 8, the description thereof will be omitted.
[0080]
　Upon receiving the NAS: Service Request message in FIG. 11-2, the MME identifies the Service ID using the subscriber information about the UE, and further identifies the Resource ID associated with the Service ID. The MME determines whether or not the radio resource indicated by the Resource ID can be allocated to the UE. When the MME determines that the radio resource cannot be allocated to the UE, it transmits a NAS: Service Reject message to the UE via the eNodeB without executing the processes after 4 in FIG. 8 (4 in FIG. 11 and 5) in FIG. The MME notifies the UE that the UE triggered Service Request procedure has not been completed normally by sending a NAS: Service Reject message to the UE.
[0081]
　As described above, by using the communication system according to the third embodiment of the present disclosure, the MME can determine whether or not the radio resource indicated by the specified Resource ID can be allocated to the UE. .. As a result, when the MME determines that the wireless resource cannot be allocated, the Attach procedure and the UE triggered Service Request procedure are performed without performing a plurality of processes including the wireless bearer setting process between the eNodeB and the UE. Can be canceled. Therefore, when the MME determines that the radio resource cannot be allocated, the number of messages of the Attach procedure and the UE triggered Service Request procedure can be reduced as compared with the number of messages in the second embodiment.
[0082]
　(Embodiment 4)
　Subsequently, a configuration example of the communication system according to the fourth embodiment of the present disclosure will be described with reference to FIG. The communication system of FIG. 12 is a communication system that supports a 3G wireless communication system as a wireless communication system, and is a communication system defined as GPRS in 3GPP.
[0083]
　The communication system of FIG. 12 is MS60, UTRAN61, SGSN62, GGSN63 (Gateway GPRS Support Node), HLR (Home Location Register) 64, PDN (Packet Data Network) 65, MSC (Mobile Switching Center) / VLR (Visited Location Register). It has 66 and EIR67.
[0084]
　MS60 is a term used as a general term for wireless terminals in 3GPP. The MS may be replaced, for example, with the UE. The MS60 has the same configuration as the UE 40 shown in FIG. UTRAN61 is a RAN that uses a 3G wireless system as a wireless access system. UTRAN61 has an RNC.
[0085]
　The SGSN62 is a node that executes mobility management, session management, and the like related to the MS60. The HLR64 is a node that manages subscriber information regarding the MS60. Subscriber information includes information about services used by the MS60. The GGSN63 is a node that relays data transmitted between the MS60 and the PDN65. The PDN65 may be, for example, a server device managed by a business operator or the like that provides a service to the MS60, or a network including a group of server devices.
[0086]
　The MSC / VLR66 is a node that has a circuit-switched function and manages MS subscriber information. The EI R67 is a node that manages MS identification information (for example, IMEI: International Mobile Equipment Identity).
[0087]
　A Uu reference point is defined between the MS60 and the UTRAN61. An Iu reference point is defined between UTRAN61 and SGSN62. A Gn reference point is defined between the SGSN 62 and the GGSN 63. A Gr reference point is defined between SGSN62 and HLR64. A Gc reference point is defined between GGSN63 and HLR64. A Gi reference point is defined between the GGSN63 and the PDN65. An Iu reference point is defined between the UTRAN61 and the MSC / VLR66. A Gs reference point is defined between the SGSN62 and the MSC / VLR66. A D reference point is defined between the HLR64 and the MSC / VLR66. A Gp reference point is defined between SGSN62 and EIR67.
[0088]
　The configuration of the radio resource managed by the RNC of the UTRAN 61 is the same as that shown in FIG. That is, the radio resource group managed by eNodeB in FIG. 4 is replaced with the radio resource group managed by RNC.
[0089]
　The information contained in the MS60, RNC, SGSN62, HLR64, and the information management device is the same as in FIG. That is, the UE 40 in FIG. 5 is replaced with MS60, the eNodeB in FIG. 5 is replaced with RNC, the MME42 in FIG. 5 is replaced with SGSN62, and the HSS43 in FIG. 5 is replaced with HLR64.
[0090]
　Subsequently, the Combined GPRS / IMSI Attach Procedure according to the fourth embodiment of the present disclosure will be described with reference to FIG. FIG. 13 shows a processing flow when the Combined GPRS / IMSI Attach Procedure is normally completed in the communication system shown in FIG. The Combined GPRS / IMSI Attach Procedure shown in FIG. 13 is based on TS23.060 V13.5.0 (2015-12) Figure 22: Combined GPRS / IMSI Attach Procedure. In the A Combined GPRS / IMSI Attach Procedure shown in FIG. 13, detailed description of the same processing as TS23.060 V13.5.0 (2015-12) Figure 22: Combined GPRS / IMSI Attach Procedure will be omitted.
[0091]
　Further, the MS in FIG. 13 corresponds to the MS60 in FIG. The RAN of FIG. 13 corresponds to the UTRAN 61 of FIG. The new SGSN of FIG. 13 corresponds to the SGSN 62 of FIG. The old SGSN in FIG. 13 is the SGSN to which the MS60 was assigned in the previous Combined GPRS / IMSI Attach Procedure. In the Combined GPRS / IMSI Attach Procedure shown in FIG. 13, for example, due to the movement of the MS60, an SGSN (new SGSN) different from the SGSN (Old SGSN) assigned in the previous Combined GPRS / IMSI Attach Procedure was assigned. The operation of the case will be described.
[0092]
　The GGSN of FIG. 13 corresponds to the GGSN 63 of FIG. The HLR in FIG. 13 corresponds to the HLR 64 in FIG. The new MSC / VLR in FIG. 13 corresponds to the MSC / VLR 66 in FIG. The old MSC / VLR in FIG. 13 is the MSC / VLR that the MS60 was assigned in the previous Combined GPRS / IMSI Attach Procedure. The EIR of FIG. 13 corresponds to the EIR 67 of FIG.
[0093]
　Since 1 to 6 in FIG. 13 are the same as the processes shown in TS23.060 V13.5.0 (2015-12) Figure 22: Combined GPRS / IMSI Attach Procedure, detailed description thereof will be omitted. In the processes 1 to 13 of FIG. 13, the authentication process related to MS is mainly executed.
[0094]
　When the processes 1 to 13 in FIG. 13 are completed, the new SGSN sends an Update Location Request message to the HLR (7a in FIG. 13). The Update Location Request message contains the IMSI of the MS. Since 7b in FIG. 13 to 7e in FIG. 13 are the same as the processes shown in TS23.060 V13.5.0 (2015-12) Figure 22: Combined GPRS / IMSI Attach Procedure, detailed description thereof will be omitted. In the process of 7b to 13e of FIG. 13, the process of deleting the information about the MS managed in the Old SGSN is mainly executed.
[0095]
　When the HLR acquires the IMSI of the MS in 7a of FIG. 13, the HLR identifies the UE Usage type associated with the acquired IMSI. Further, the HLR acquires the Service ID associated with the specified UE Usage type from the information management device. When the HLR and the information management device are the same device, the HLR uses the specified UE Usage type to further identify the Service ID associated with the specified UE Usage type.
[0096]
　The HLR sends an Insert Subscriber Data message to the new SGSN (7f in FIG. 13). The Insert Subscriber Data message contains the Service ID.
[0097]
　Since 7g in FIG. 13 to 8h in FIG. 13 are the same as the processing shown in TS23.060 V13.5.0 (2015-12) Figure 22: Combined GPRS / IMSI Attach Procedure, detailed description thereof will be omitted. In 7g of FIG. 13 to 8h of FIG. 13, the process of registering the SGSN and MSC / VLR assigned in the current Attach Procedure to the HLR is mainly executed.
[0098]
　Although it was explained that the Service ID is included in the Insert Subscriber Data message in 7f of FIG. 13, the Service ID may be included in the Update Location Ack message in 7h of FIG.
[0099]
　Since 9 to 12 in FIG. 13 are the same as the processing shown in TS23.060 V13.5.0 (2015-12) Figure 22: Combined GPRS / IMSI Attach Procedure, detailed description thereof will be omitted. In 9 to 12 of FIG. 13, mainly the processing associated with the completion of the Attach Procedure is executed.
[0100]
　Subsequently, the PDP Context Activation Procedure for Iu mode according to the fourth embodiment of the present disclosure will be described with reference to FIG. The PDP Context Activation Procedure for Iu mode shown in FIG. 14 is based on TS23.060 V13.5.0 (2015-12) Figure 64: PDP Context Activation Procedure for Iu mode. In the PDP Context Activation Procedure for Iu mode of FIG. 14, detailed description of the same processing as TS23.060 V13.5.0 (2015-12) Figure 64: PDP Context Activation Procedure for Iu mode will be omitted.
[0101]
　The PDP Context Activation Procedure for Iu mode is a process executed when, for example, the MS starts data transmission or transmission. Assuming that the PDP Context Activation Procedure for Iu mode is executed, it is assumed that the Attach procedure has been completed normally, and SGSN manages the subscriber information related to MS.
[0102]
　First, the MS sends an Activate PDP Context Request message to the SGSN via the RAN (1 in FIG. 14). The SGSN uses the subscriber information of the MS to identify the Service ID associated with the MS. Figure 14-4 is the same process as TS23.060 V13.5.0 (2015-12) Figure 64: PDP Context Activation Procedure for Iu mode, so detailed description will be omitted. In 4 of FIG. 14, a process of establishing a session or bearer used by the MS is mainly executed between the SGSN and the GGSN.
[0103]
　The SGSN notifies the RAN of the Resource ID associated with the specified Service ID in the Radio Access Bearer process (5 in FIG. 14). Further, the RAN determines whether or not the radio resource indicated by the Resource ID notified from the SGSN can be assigned to the MS. When the RAN determines that the radio resource indicated by the Resource ID transmitted from the SGSN can be assigned to the MS, the RAN allocates the radio resource indicated by the Resource ID to the MS in the Radio Access Bearer Setup process shown in FIG. Since the processing after 6 in FIG. 14 is the same as TS23.060 V13.5.0 (2015-12) Figure 64: PDP Context Activation Procedure for Iu mode, detailed description is omitted. In the processes after 6 in FIG. 8, the process for notifying the GGSN of the information regarding the radio bearer established between the MS and the RAN is mainly executed.
[0104]
　Subsequently, the flow of the PDP Context Activation Procedure for Iu mode according to the fourth embodiment of the present disclosure will be described with reference to FIG. FIG. 15 shows a processing flow when the PDP Context Activation Procedure for Iu mode is not normally completed in the communication system shown in FIG. 1 of FIG. 15 and 4 of FIG. 15 are the same as those of FIG. 14, and thus the description thereof will be omitted.
[0105]
　The SGSN sends a RAB Assignment Request message including the Resource ID to the RAN (7 in FIG. 15). Upon receiving the RAB Assignment Request message including the Resource ID in 7 of FIG. 15, the RAN determines whether or not the radio resource indicated by the Resource ID can be allocated to the MS.
[0106]
　When the RAN determines that the radio resource indicated by the Resource ID transmitted from the SGSN cannot be allocated to the MS, the RAN transmits a RAB Assignment Response message to the SGSN without establishing a radio bearer with the MS (Fig. 15-7).
[0107]
　Next, the SGSN sends and receives a Delete PDP Context Request / Response message with the GGSN in order to delete the PDP Context with the GGSN set in FIG. 15-4 (8 of FIG. 15).
[0108]
　Next, the SGSN sends an Activate PDP Context Reject message to the MS via the RAN (9 in FIG. 15). The SGSN notifies the MS that the PDP Context Activation Procedure for Iu mode has not been completed normally by sending an Activate PDP Context Reject message to the MS.
[0109]
　Subsequently, the MS Initiated Service Request Procedure using GN / Gp according to the fourth embodiment of the present disclosure will be described with reference to FIG. The MS Initiated Service Request Procedure using GN / Gp shown in FIG. 16 is based on TS23.060 V13.5.0 (2015-12) Figure 50: MS Initiated Service Request Procedure using GN / Gp. In MS Initiated Service Request Procedure using GN / Gp in Fig. 16, detailed description is omitted for the same processing as TS23.060 V13.5.0 (2015-12) Figure 50: MS Initiated Service Request Procedure using GN / Gp. ..
[0110]
　FIG. 16 shows a processing flow when MS Initiated Service Request Procedure using GN / Gp is ​​normally completed in the communication system of FIG. The MS Initiated Service Request Procedure using GN / Gp is, for example, a process executed when the MS starts data transmission or transmission. Assuming that the MS Initiated Service Request Procedure using GN / Gp is ​​executed, the Attach procedure is completed normally, and the SGSN manages the subscriber information related to the MS.
[0111]
　In FIG. 16, the RAN in FIGS. 13 to 15 will be described as the RNC included in the UTRAN 61. Since 1 in FIG. 16 is the same as the process shown in TS23.060 V13.5.0 (2015-12) Figure 50: MS Initiated Service Request Procedure using GN / Gp, detailed description thereof will be omitted.
[0112]
　Next, the MS transmits a Service Request message to the SGSN via the RNC (Fig. 16-2). The SGSN uses the subscriber information about the MS to identify the Service ID associated with the MS. Next, the authentication process related to MS is executed between MS and RNC, between RNC and SGSN, and further between SGSN and HLR (3 in FIG. 16).
[0113]
　Next, the SGSN sends a Radio Access Bearer Assignment Request message including the Resource ID associated with the specified Service ID to the RNC (4 in FIG. 16).
[0114]
　Next, the RNC determines whether or not the radio resource indicated by the Resource ID transmitted from the SGSN can be allocated to the MS. When the RNC determines that the radio resource indicated by the Resource ID transmitted from the SGSN can be assigned to the MS, the RNC sends a Radio Bearer Setup message to allocate the radio resource indicated by the Resource ID to the MS (FIG. 16). 5). Since the processing after 6 in FIG. 16 is the same as TS23.060 V13.5.0 (2015-12) Figure 50: MS Initiated Service Request Procedure using GN / Gp, detailed description is omitted.
[0115]
　Subsequently, the MS Initiated Service Request Procedure using GN / Gp according to the fourth embodiment of the present disclosure will be described with reference to FIG. FIG. 17 shows a processing flow when MS Initiated Service Request Procedure using GN / Gp is ​​not normally completed in the communication system of FIG.
[0116]
　Since 1 to 17 of FIG. 17 are the same as 1 to 4 of FIG. 16, the description thereof will be omitted. The RNC determines whether or not the radio resource indicated by the Resource ID transmitted from the SGSN in 4 of FIG. 17 can be assigned to the MS. When the RNC determines that the radio resource indicated by the Resource ID transmitted from the SGSN cannot be allocated to the MS, the RNC sends a Radio Access Bearer Assignment Response message to the MS without sending a Radio Bearer Setup message (Fig.). 17-5). Next, the SGSN sends a Service Reject message to the MS via the RNC (6 in FIG. 17). The SGSN notifies the MS that the MS Initiated Service Request Procedure using GN / Gp was not completed normally by sending a Service Reject message to the MS.
[0117]
　As described above, by using the communication system according to the fourth embodiment of the present disclosure, the RAN or RNC is associated with a service different from the service used by the MS, as in the case of using the EPS. It is possible to prevent the radio resource included in the Slice from being allocated to the MS.
[0118]
　Further, the SGSN can specify the radio resource to be assigned to the MS by using the Service ID that identifies the group to which the MS belongs. As a result, when the RAN Slice is composed of a group of radio resources assigned to a plurality of specific groups, it is possible to prevent the radio resources assigned to a group different from the group to which the MS belongs from being allocated to the MS.
[0119]
　Further, the RAN or RNC can determine whether or not the radio resource included in the Resource ID specified by the SGSN can be allocated to the MS. As a result, when the MS is notified by the RAN that the radio resource cannot be allocated, the MS reselects another RAN that provides the service used by the MS and has the available radio resource. be able to.
[0120]
　(Embodiment 5)
　Next, a process flow when the PDP Context Activation Procedure for Iu mode is normally completed according to the fifth embodiment of the present disclosure will be described. Here, processing different from the processing flow in FIG. 14 will be mainly described. In the fourth embodiment, the RAN determines whether or not the radio resource indicated by the Resource ID can be allocated to the MS. On the other hand, in the fifth embodiment, the SGSN determines whether or not the radio resource indicated by the Resource ID can be allocated to the MS.
[0121]
　It is assumed that the RAN periodically transmits the allocation status of the radio resource to the SGSN. That is, it is assumed that the SGSN holds the RAN radio resource allocation status.
[0122]
　In this case, when the SGSN receives the Activate PDP Context Request message in FIG. 14-1, the SGSN identifies the Service ID using the subscriber information related to the MS, and further identifies the Resource ID associated with the Service ID. The SGSN determines whether or not the radio resource indicated by the Resource ID can be allocated to the MS. When the SGSN determines that the radio resource can be allocated to the MS, the SGSN executes the processes after 4 in FIG. However, RAN does not execute the process of determining whether or not the radio resource can be allocated to the MS in FIG. 14-5.
[0123]
　Subsequently, the flow of processing when the PDP Context Activation Procedure for Iu mode according to the fifth embodiment of the present disclosure is not completed normally will be described with reference to FIG. Since 1 in FIG. 18 is the same as 1 in FIG. 14, the description thereof will be omitted.
[0124]
　When the SGSN receives the Activate PDP Context Request message in FIG. 18-1, the SGSN identifies the Service ID using the subscriber information related to the MS, and further identifies the Resource ID associated with the Service ID. The SGSN determines whether or not the radio resource indicated by the Resource ID can be allocated to the MS. When the SGSN determines that the radio resource cannot be allocated to the MS, it sends an Activate PDP Context Reject message to the MS via the RAN without executing the processes after 4 in FIG. 14 (2 in FIG. 18). .. The SGSN notifies the UE that the PDP Context Activation Procedure for Iu mode has not been completed normally by sending an Activate PDP Context Reject message to the MS.
[0125]
　Next, a process flow when the MS Initiated Service Request Procedure using GN / Gp is ​​normally completed according to the fifth embodiment of the present disclosure will be described. Here, processing different from the processing flow in FIG. 16 will be mainly described. In the fourth embodiment, the RAN determines whether or not the radio resource indicated by the Resource ID can be allocated to the MS. On the other hand, in the fifth embodiment, the SGSN determines whether or not the radio resource indicated by the Resource ID can be allocated to the MS.
[0126]
　It is assumed that the RAN periodically transmits the allocation status of the radio resource to the SGSN. That is, it is assumed that the SGSN holds the RAN radio resource allocation status.
[0127]
　In this case, when the SGSN receives the Service Request message in FIG. 16-2, the SGSN identifies the Service ID using the subscriber information related to the MS, and further identifies the Resource ID associated with the Service ID. The SGSN determines whether or not the radio resource indicated by the Resource ID can be allocated to the MS. When the SGSN determines that the radio resource can be allocated to the MS, the SGSN executes the processes after 3 in FIG. However, RAN does not execute the process of determining whether or not the radio resource can be allocated to the MS in FIG. 16-4.
[0128]
　Subsequently, the flow of processing when the MS Initiated Service Request Procedure using GN / Gp according to the fifth embodiment of the present disclosure is not completed normally will be described with reference to FIG. 1 to 19 of FIG. 19 are the same as those of 1 to 16 of FIG. 16, and thus the description thereof will be omitted.
[0129]
　When the SGSN receives the Service Request message in FIG. 19-2, the SGSN identifies the Service ID using the subscriber information related to the MS, and further identifies the Resource ID associated with the Service ID. The SGSN determines whether or not the radio resource indicated by the Resource ID can be allocated to the MS. When the SGSN determines that the radio resource cannot be allocated to the MS, it transmits a Service Reject message to the MS via the RNC without executing the processes after 4 in FIG. 16 (4 in FIG. 19). The SGSN notifies the UE that the MS Initiated Service Request Procedure using GN / Gp was not completed normally by sending a Service Reject message to the MS.
[0130]
　As described above, by using the communication system according to the fifth embodiment of the present disclosure, the SGSN can determine whether or not the radio resource indicated by the specified Resource ID can be allocated to the UE. .. As a result, when the SGSN determines that the radio resource cannot be allocated, the Attach procedure and PDP Context are not performed without performing a plurality of processes including the radio bearer setting process between the RAN (RNC) and the MS. Activation Procedure for Iu mode and MS Initiated Service Request Procedure using GN / Gp can be canceled. Therefore, when the SGSN determines that the radio resource cannot be allocated, the number of messages of Attach procedure, PDP Context Activation Procedure for Iu mode, and MS Initiated Service Request Procedure using GN / Gp can be reduced.
[0131]
　Subsequently, the configuration examples of the core node 10, the base station 20, and the wireless terminal 30 described in the plurality of embodiments described above will be described below. FIG. 20 is a block diagram showing a configuration example of the base station 20. Referring to FIG. 20, base station 20 includes RF transceiver 1001, network interface 1003, processor 1004, and memory 1005. RF transceiver 1001 performs analog RF signal processing to communicate with UEs. The RF transceiver 1001 may include a plurality of transceivers. The RF transceiver 1001 is coupled with the antenna 1002 and the processor 1004. The RF transceiver 1001 receives the modulation symbol data (or OFDM symbol data) from the processor 1004, generates a transmission RF signal, and supplies the transmission RF signal to the antenna 1002. Further, the RF transceiver 1001 generates a baseband reception signal based on the reception RF signal received by the antenna 1002, and supplies the baseband reception signal to the processor 1004.
[0132]
　The network interface 1003 is used to communicate with a network node (eg, core node 10). The network interface 1003 may include, for example, an IEEE 802.3 series compliant network interface card (NIC).
[0133]
　Processor 1004 performs data plane processing and control plane processing, including digital baseband signal processing for wireless communication. For example, in the case of LTE and LTE-Advanced, the digital baseband signal processing by the processor 1004 may include signal processing of the MAC layer and the PHY layer.
[0134]
　Processor 1004 may include a plurality of processors. For example, processor 1004 may include a modem processor (eg, DSP) for digital baseband signal processing and a protocol stack processor (eg, CPU or MPU) for control plane processing.
[0135]
　The memory 1005 is composed of a combination of a volatile memory and a non-volatile memory. Memory 1005 may include a plurality of physically independent memory devices. Volatile memory is, for example, Static Random Access Memory (SRAM) or Dynamic RAM (DRAM), or a combination thereof. Non-volatile memory can be masked Read Only Memory (MROM), Electrically Erasable Programmable ROM (EEPROM), flash memory, or hard disk drive, or any combination thereof. Memory 1005 may include storage located away from processor 1004. In this case, processor 1004 may access memory 1005 via network interface 1003 or an I / O interface (not shown).
[0136]
　The memory 1005 may store a software module (computer program) including an instruction group and data for performing processing by the base station 20 described in the plurality of embodiments described above. In some implementations, processor 1004 may be configured to read the software module from memory 1005 and execute it to perform the processing of the remote node 10 described in the embodiments described above.
[0137]
　FIG. 21 is a block diagram showing a configuration example of the wireless terminal 30. Radio Frequency (RF) transceiver 1101 performs analog RF signal processing to communicate with base station 20. The analog RF signal processing performed by the RF transceiver 1101 includes frequency up-conversion, frequency down-conversion, and amplification. The RF transceiver 1101 is coupled with the antenna 1102 and the baseband processor 1103. That is, the RF transceiver 1101 receives the modulation symbol data (or OFDM symbol data) from the baseband processor 1103, generates a transmission RF signal, and supplies the transmission RF signal to the antenna 1102. Further, the RF transceiver 1101 generates a baseband reception signal based on the reception RF signal received by the antenna 1102, and supplies the baseband reception signal to the baseband processor 1103.
[0138]
　The baseband processor 1103 performs digital baseband signal processing (data plane processing) and control plane processing for wireless communication. Digital baseband signal processing includes (a) data compression / restoration, (b) data segmentation / concatenation, (c) transmission format (transmission frame) generation / decomposition, and (d) transmission path coding / decoding. , (E) Modulation (symbol mapping) / demodulation, and (f) Generation of OFDM symbol data (baseband OFDM signal) by Inverse Fast Fourier Transform (IFFT). Control plane processing, on the other hand, includes layer 1 (eg, transmit power control), layer 2 (eg, radio resource management, and hybrid automatic repeat request (HARQ) processing), and layer 3 (eg, attach, mobility, and call management). Includes communication management of).
[0139]
　For example, for LTE and LTE-Advanced, digital baseband signal processing by the baseband processor 1103 includes signal processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, MAC layer, and PHY layer. It may be. Further, the control plane processing by the baseband processor 1103 may include the processing of the Non-Access Stratum (NAS) protocol, the RRC protocol, and the MAC CE.
[0140]
　The baseband processor 1103 includes a modem processor (eg, Digital Signal Processor (DSP)) that performs digital baseband signal processing, a protocol stack processor (eg, Central Processing Unit (CPU)) that performs control plane processing, or a Micro Processing Unit. (MPU)) may be included. In this case, the protocol stack processor that performs the control plane processing may be shared with the application processor 1104 described later.
[0141]
　The application processor 1104 is also referred to as a CPU, MPU, microprocessor, or processor core. The application processor 1104 may include a plurality of processors (a plurality of processor cores). The application processor 1104 is a system software program (Operating System (OS)) read from memory 1106 or a memory (not shown) and various application programs (eg, call application, web browser, mailer, camera operation application, music playback). By executing the application), various functions of the wireless terminal 30 are realized.
[0142]
　In some implementations, the baseband processor 1103 and the application processor 1104 may be integrated on one chip, as shown by the dashed line (1105) in FIG. In other words, the baseband processor 1103 and the application processor 1104 may be implemented as one System on Chip (SoC) device 1105. SoC devices are sometimes referred to as system large scale integration (LSI) or chipsets.
[0143]
　The memory 1106 is a volatile memory, a non-volatile memory, or a combination thereof. The memory 1106 may include a plurality of physically independent memory devices. Volatile memory is, for example, Static Random Access Memory (SRAM) or Dynamic RAM (DRAM), or a combination thereof. Non-volatile memory can be masked Read Only Memory (MROM), Electrically Erasable Programmable ROM (EEPROM), flash memory, or hard disk drive, or any combination thereof. For example, memory 1106 may include external memory devices accessible from baseband processor 1103, application processor 1104, and SoC 1105. The memory 1106 may include a built-in memory device integrated in the baseband processor 1103, the application processor 1104, or the SoC 1105. Further, the memory 1106 may include the memory in the Universal Integrated Circuit Card (UICC).
[0144]
　The memory 1106 may store a software module (computer program) including an instruction group and data for performing processing by the wireless terminal 30 described in the plurality of embodiments described above. In some implementations, the baseband processor 1103 or application processor 1104 may be configured to read the software module from memory 1106 and execute it to perform the processing of the wireless terminal 30 described in the embodiments described above. good.
[0145]
　FIG. 22 is a block diagram showing a configuration example of the core node 10. Referring to FIG. 22, center node 20 includes network interface 1201, processor 1202, and memory 1203. The network interface 1201 is used to communicate with a network node (eg, base station 20). The network interface 1201 may include, for example, an IEEE 802.3 series compliant network interface card (NIC).
[0146]
　The processor 1202 reads the software (computer program) from the memory 1203 and executes it to perform the processing of the core node 10 described with reference to the sequence diagram and the flowchart in the above-described embodiment. Processor 1202 may be, for example, a microprocessor, MPU, or CPU. Processor 1202 may include a plurality of processors.
[0147]
　Processor 1202 performs data plane processing and control plane processing, including digital baseband signal processing for wireless communication. For example, in the case of LTE and LTE-Advanced, the digital baseband signal processing by processor 1004 may include signal processing of the PDCP layer, RLC layer, and MAC layer. Further, the signal processing by the processor 1202 may include signal processing of the GTP-U / UDP / IP layer at the X2-U interface and the S1-U interface. Further, the control plane processing by the processor 1004 may include processing of the X2AP protocol, the S1-MME protocol, and the RRC protocol.
[0148]
　Processor 1202 may include a plurality of processors. For example, the processor 1004 is a modem processor (eg, DSP) that performs digital baseband signal processing, and a processor (eg, DSP) that performs GTP-U / UDP / IP layer signal processing at the X2-U interface and the S1-U interface. It may include a DSP) and a protocol stack processor (eg, CPU or MPU) that performs control plane processing.
[0149]
　The memory 1203 is composed of a combination of a volatile memory and a non-volatile memory. Memory 1203 may include storage located away from processor 1202. In this case, processor 1202 may access memory 1203 via an I / O interface (not shown).
[0150]
　In the example of FIG. 22, memory 1203 is used to store software modules. The processor 1202 can perform the processing of the core node 10 described in the above-described embodiment by reading these software modules from the memory 1203 and executing them.
[0151]
　As described with reference to FIGS. 20 to 22, each of the processors included in the base station 20, the wireless terminal 30, and the core node 10 in the above-described embodiment is for causing the computer to perform the algorithm described with reference to the drawings. Execute one or more programs including a set of instructions.
[0152]
　In the above example, the program can be stored and supplied to a computer using various types of non-transitory computer readable medium. Non-transient computer-readable media include various types of tangible storage media. Examples of non-temporary computer-readable media include magnetic recording media (eg, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg, magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs. CD-R / W, 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 transient computer readable medium. Examples of temporary computer-readable media include electrical, optical, 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.
[0153]
　The present disclosure is not limited to the above embodiment, and can be appropriately modified without departing from the spirit. Further, the present disclosure may be carried out by appropriately combining the respective embodiments.
[0154]
　Although the disclosure of the present application has been described above with reference to the embodiments, the disclosure of the present application is not limited to the above. Various changes that can be understood by those skilled in the art can be made to the structure and details of the disclosure of the present application within the scope of the disclosure.
[0155]
　This application claims priority on the basis of Japanese application Japanese Patent Application No. 2016-058260 filed on March 23, 2016 and incorporates all of its disclosures herein.
[0156]
　Some or all of the above embodiments may also be described, but not limited to:
　(Appendix 1) The
　determination unit determines the radio resource to be allocated according to the service provided to the wireless terminal and
　the base station that manages a plurality of radio resources for each RAN Slice associated with the service. A
core node comprising a communication unit that transmits resource identification information indicating a radio resource that has been used .
　(Appendix 2) The
　determination unit
　indicates a service used by the wireless terminal, manages the service identification information uniquely identified in the mobile core network in association with the resource identification information, and identifies the terminal of the wireless terminal. The core node according to Appendix 1, which acquires the service identification information from a management device that manages the information in association with the service identification information.
　(Appendix 3) The
　core node according to Appendix 2, wherein the service identification information uniquely identified in the mobile core network is used as the resource identification information.
　(Appendix 4) The
　determination unit
　determines whether or not there is a wireless resource to be allocated to the wireless terminal in the RAN Slice that provides the service used by the wireless terminal, based on the usage status of the wireless resource in the base station. The core node according to any one of Supplementary note 1 to 3.
　(Appendix 5)
　When the
　determination unit determines that the wireless resource to be allocated to the wireless terminal does not exist , the communication unit transmits a rejection message indicating that the wireless resource cannot be allocated to the wireless terminal via the base station. , The core node described in Appendix 4.
　(Appendix 6)
　A management unit that manages multiple wireless resources for each RAN Slice associated with the
　service, and resource identification information that indicates the wireless resources that are transmitted from the core node and are allocated according to the service provided to the wireless terminal. A 　base station including a communication unit for receiving and a
　resource allocation unit for allocating a radio resource indicated in the resource identification information to the radio terminal
.
　(Supplementary note 7) 　The base station according to Supplementary note 6,
　wherein the resource allocation unit
determines whether or not to allocate the wireless resource indicated in the resource identification information to the wireless terminal according to the usage status of the wireless resource.
　(Appendix 8)
　When the resource allocation unit determines that the wireless resource to be allocated to the wireless terminal does not exist, the resource allocation unit further includes a communication unit that transmits a refusal message indicating that the wireless resource cannot be allocated to the wireless terminal. The base station described in Appendix 7.
　(Appendix 9)
　A receiving unit that receives each notification information transmitted by a plurality of base stations, and
　A radio including a determination unit that determines to connect to a base station that has transmitted broadcast information including RAN Slice identification information indicating RAN Slice that provides a service used by the own terminal from the plurality of base stations. Terminal.
　(Appendix 10)
　When
　there are a plurality of base stations that have transmitted broadcast information including RAN Slice identification information indicating RAN Slice that provides the service to be used, the determination unit is a radio wave of radio waves output from each base station. The wireless terminal according to Appendix 9, which determines a base station to be connected based on the strength.
　(Appendix 11)
　When the determination unit
　receives a rejection message indicating that the radio resource cannot be allocated from the base station , the determination unit transmits notification information including RAN Slice identification information indicating the RAN Slice that provides the service to be used. The wireless terminal according to Appendix 9 or 10, which determines to connect to a base station different from the determined base station from among the plurality of base stations that have been determined.
　(Appendix 12) A
　resource that determines the wireless resource to be allocated according to the service provided to the wireless terminal and indicates the determined
　wireless resource to the base station that manages a plurality of wireless resources for each RAN Slice associated with the service. A communication method that sends identification information.
　(Appendix 13)
　Multiple radio resources are managed for each RAN Slice associated with the service.
　A
　radio resource allocation method for receiving resource identification information indicating a radio resource to be allocated according to a service provided to a radio terminal transmitted from a core node and allocating the radio resource indicated in the resource identification information to the radio terminal.
　(Appendix 14)
　Each of the broadcast information transmitted by the plurality of base stations has been received, and the
　broadcast information including the RAN Slice identification information indicating the RAN Slice that provides the service to be used has been transmitted from the plurality of base stations. A base station selection method that determines to connect to a base station.
　(Appendix 15) A
　resource that determines the wireless resource to be allocated according to the service provided to the wireless terminal and indicates the determined
　wireless resource to the base station that manages a plurality of wireless resources for each RAN Slice associated with the service. A program that causes a computer to send identification information.
Code description
[0157]
　10 Core node
　12 Communication unit
　14 Decision unit
　20 Base station
　22 Communication unit
　24 Management unit
　26 Resource allocation unit
　30 Radio terminal
　40 UE
　41 E-UTRAN
　42 MME
　43 HSS
　44 SGSN
　45 SGW
　46 PGW
　47 PCRF
　48 UTRAN
　49 GERAN
　50 Operator's IP Services
　60 MS
　61 UTRAN
　62 SGSN
　63 GGSN
　64 HLR
　65 PDN
　66 MSC / VLR
　67 EIR
　71 Communication unit
　72 RAN Slice Availability determination unit
　73 Connection destination RAN Slice selection unit
　81 Control unit
　82 Communication unit
The scope of the claims
[Claim 1]
　A determination means for determining the radio resource to be allocated according to the service provided to the radio terminal, and
　a base station for managing a plurality of radio resources for each RAN Slice associated with the service, the radio resource determined in the determination means. A
core node comprising a means of communication for transmitting resource identification information indicating .
[Claim 2]
　The determination means
　indicates a service used by the wireless terminal, manages the service identification information uniquely identified in the mobile core network in association with the resource identification information, and manages the terminal identification information of the wireless terminal and the service. The core node according to claim 1, wherein the service identification information is acquired from a management device that manages the identification information in association with the identification information.
[Claim 3]
　The core node according to claim 2, wherein the service identification information uniquely identified in the mobile core network is used as the resource identification information.
[Claim 4]
　The determination means
　determines whether or not there is a radio resource to be allocated to the radio terminal in the RAN Slice that provides the service used by the radio terminal, based on the usage status of the radio resource in the base station. The core node according to any one of 1 to 3.
[Claim 5]
　When the
　determination means determines that the wireless resource to be allocated to the wireless terminal does not exist , the communication means transmits a refusal message indicating that the wireless resource cannot be allocated to the wireless terminal via the base station. , The core node according to claim 4.
[Claim 6]
　A management unit that manages multiple wireless resources for each RAN Slice associated with a
　service, and a communication means that receives resource identification information sent from the core node that indicates the wireless resources to be allocated according to the service provided to the wireless terminal. A 　base station comprising
　, and a resource allocation means for allocating the radio resource shown in the resource identification information to the radio terminal
.
[Claim 7]

　The base station according to claim 6, 　wherein the resource allocation means determines whether or not to allocate the wireless resource shown in the resource identification information to the wireless terminal according to the usage status of the wireless resource.
[Claim 8]
　The seventh aspect of the present invention further comprises a communication means for transmitting a refusal message indicating that the wireless resource cannot be allocated to the wireless terminal when the resource allocation means determines that the wireless resource to be allocated to the wireless terminal does not exist. The listed base station.
[Claim 9]
　Receiving means for receiving each notification information transmitted by a
　plurality of base stations, and transmitting notification information including RAN Slice identification information indicating RAN Slice providing a service used by the own terminal from the plurality of base stations. A wireless terminal provided with a decision-making means for deciding to connect to a base station that has been used.
[Claim 10]
　When
　there are a plurality of base stations that have transmitted broadcast information including RAN Slice identification information indicating the RAN Slice that provides the service to be used, the determination means is based on the radio wave strength of the radio waves output from each base station. The wireless terminal according to claim 9, which determines a base station to be connected.
[Claim 11]
　When the determination means
　receives a rejection message indicating that the radio resource cannot be allocated from the base station , the determination means has transmitted a plurality of broadcast information including RAN Slice identification information indicating the RAN Slice that provides the service to be used. The wireless terminal according to claim 9 or 10, which determines to connect to a base station different from the determined base station from among the base stations.
[Claim 12]
　The wireless resource to be allocated is determined according to the service provided to the wireless terminal, and the
　resource identification information indicating the determined wireless resource is transmitted to the base station that manages multiple wireless resources for each RAN Slice associated with the service. Communication method.
[Claim 13]
　A plurality of wireless resources are managed for each RAN Slice associated with the
　service, and resource identification information indicating the wireless resource to be allocated according to the service provided to the wireless terminal transmitted from the
　core node is received, and the resource identification information is received. A wireless resource allocation method for allocating the wireless resource shown in the above to the wireless terminal.
[Claim 14]
　Receives each broadcast information transmitted by a
　plurality of base stations, and connects to the base station that has transmitted the broadcast information including the RAN Slice identification information indicating the RAN Slice that provides the service to be used from the plurality of base stations. How to select a base station to decide to do.
[Claim 15]
　The wireless resource to be allocated is determined according to the service provided to the wireless terminal, and the
　resource identification information indicating the determined wireless resource is transmitted to the base station that manages multiple wireless resources for each RAN Slice associated with the service. A non-temporary computer-readable medium that contains programs that let a computer do what it does.