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WO2018186270A1 - Système de communication - Google Patents

Système de communication Download PDF

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Publication number
WO2018186270A1
WO2018186270A1 PCT/JP2018/012963 JP2018012963W WO2018186270A1 WO 2018186270 A1 WO2018186270 A1 WO 2018186270A1 JP 2018012963 W JP2018012963 W JP 2018012963W WO 2018186270 A1 WO2018186270 A1 WO 2018186270A1
Authority
WO
WIPO (PCT)
Prior art keywords
communication
data
transfer
communication path
path
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/012963
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English (en)
Japanese (ja)
Inventor
和輝 滝田
鈴木　雄一郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
Original Assignee
NTT Docomo Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to CN201880017637.8A priority Critical patent/CN110419243A/zh
Priority to JP2019511191A priority patent/JPWO2018186270A1/ja
Publication of WO2018186270A1 publication Critical patent/WO2018186270A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
    • H04W36/023—Buffering or recovering information during reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
    • H04W52/0254—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity detecting a user operation or a tactile contact or a motion of the device
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a communication system.
  • DRX Discontinuous Reception
  • DRX is a technique for intermittently receiving data at a communication terminal by providing an off time (sleep time) during which no data is received.
  • off time short time
  • extended DRX extended-DRX
  • DRX Since DRX has a limited time for data reception at the communication terminal as described above, data transmitted to the communication terminal during a time period when data reception is not performed at the communication terminal is accumulated on the core network side. However, if the data reception is started after the communication terminal has moved within the service area, the data accumulated on the core network side cannot be appropriately transmitted to the communication terminal.
  • the present invention has been made in view of the above, and an object thereof is to provide a communication system capable of appropriately performing data transmission to a communication terminal that intermittently receives data.
  • a communication system is a data transmission addressed to a communication terminal that is connected to a core network and changes the area in which it is located from the first area to the second area.
  • a communication control device that provides a communication path with a station device and transmits data addressed to the communication terminal to the base station device via the communication path, and the communication control device includes: When the communication terminal moves to the second area, for transfer different from a normal communication path for transferring untransmitted data for the communication terminal located in the first area to the communication terminal communication When the transfer communication path necessity determination unit and the transfer communication path necessity determination unit determine that the transfer communication path is necessary, the base station apparatus A transfer channel creation unit that performs processing related to creation of the transfer channel between, and a transfer processing unit that transmits the untransmitted data to the base station device using the transfer channel And the base station apparatus receives the untransmitted
  • a communication system capable of appropriately performing data transmission to a communication terminal that intermittently receives data.
  • FIG. 3 is a diagram for explaining processing performed by the communication system 1; 2 is a functional block diagram of a new MME, a new S-GW, and an eNB included in the communication system 1.
  • FIG. 3 is a sequence diagram illustrating a communication control method by the communication system 1.
  • FIG. 3 is a sequence diagram illustrating a communication control method by the communication system 1.
  • FIG. It is a figure which shows the hardware constitutions which concern on each apparatus of a communication system.
  • FIG. 1 is a schematic configuration diagram of a communication system 1 according to an embodiment of the present invention.
  • a communication system 1 shown in FIG. 1 is a group of devices that constitute a core network that complies with LTE (Long Term Evolution) communication standards (communication protocols).
  • a plurality of UEs (User Equipment) 90 that are communication terminals can connect to a core network by the communication system 1 to use a communication service such as a voice communication service.
  • the communication system 1 includes a P-GW (Packet data network Gateway) 10, an old S-GW (Serving Gateway) 20, a new S-GW 30, an old MME (Mobility Management Entity) 40, a new MME 50, and an eNB (evolved Node B) 60. It is comprised including.
  • P-GW Packet data network Gateway
  • S-GW Serving Gateway
  • MME Mobility Management Entity
  • eNB evolved Node B
  • the P-GW 10 is connectable to an S-GW (old S-GW 20 and new S-GW 30), and is a gateway (relay) that is a connection point with an IP (Internet Protocol) backbone that provides a voice communication service or a data communication service. Device).
  • the P-GW 10 transfers user data related to the UE 90 via the old S-GW 20 and the new S-GW 30.
  • S-GW (old S-GW 20 and new S-GW 30) is made connectable with MME and eNB, further connected with UE 90 via MME and eNB, and includes control signals and user data with UE 90 It is a packet gateway (relay device) that transmits IP packets. Specifically, the S-GW performs relay control of IP packets based on instructions from the MME.
  • the S-GW has a function as a communication control device in the communication system 1.
  • FIG. 1 two S-GWs, an old S-GW 20 and a new S-GW 30, are shown. “Old” and “New” correspond to before and after the UE 90 moves.
  • UE90 has shown the example which has changed the located area from the old area (1st area) to the new area (2nd area). Then, it is shown that the S-GW that performs communication control related to the UE 90 is changed from the old S-GW 20 to the new S-GW 30 as the UE 90 moves.
  • the MME (old MME 40 and new MME 50) is an exchange that accommodates one or more eNBs and provides functions such as mobility control and bearer control in LTE.
  • the MME can be connected to one or more S-GWs, and also transmits / receives information related to bearer control to the eNB and the S-GW.
  • the MME has a function as a communication control device in the communication system 1. As described above, the communication control device in the communication system 1 includes the S-GW and the MME.
  • FIG. 1 two MMEs, an old MME 40 and a new MME 50, are shown. “Old” and “New” correspond to the change of the area where UE 90 moves as the UE 90 moves, as in the case of S-GW. This shows that the old MME 40 has been changed to the new MME 50.
  • the eNB 60 is a base station device.
  • FIG. 1 shows the eNB 60 to which the UE 90 is connected for communication after the movement of the UE 90 due to movement, that is, in the new area (second area). Therefore, the eNB 60 is accommodated in the new MME 50 and communicates with the new S-GW 30 to transmit and receive data.
  • the UE 90 that is connected to the communication system 1 and receives various services through wireless communication is a terminal device capable of wireless communication, such as a smartphone or a tablet device.
  • the UE 90 is assumed to be movable by being carried by a user or mounted on a moving means such as a vehicle.
  • the eNB to which the UE 90 communicates is switched.
  • the communication path for transmitting data to the UE 90 is changed as necessary. In this embodiment, a case will be described in which the eNB to be connected for communication is switched because the UE 90 has moved.
  • the MME (old MME 40) that accommodates the eNB before switching and the MME (new MME 50) that accommodates the eNB after switching (eNB 60) are different from each other. Furthermore, the case where the old S-GW 20 corresponding to the old MME 40 and the new S-GW 50 corresponding to the new MME 50 exist individually will be described.
  • DRX control eDRX control
  • DRX control there is a time zone in which data reception is not performed in the UE 90. That is, the UE 90 intermittently receives data.
  • data addressed to the UE 90 is held as untransmitted data on the core network side, that is, in the communication system 1.
  • S-GW the old S-GW 20
  • untransmitted data that is addressed to the UE 90 but not transmitted to the UE 90 is held as buffering data.
  • the UE 90 When the UE 90 moves to an area of a new eNB (for example, eNB 60) due to the movement of the UE 90 (e.g. movement within the area), the UE 90 transmits a signal related to movement (Tracking Area Update signal) to the eNB 60.
  • the buffering data is transmitted from the old S-GW 20 to the UE 90.
  • the eNB 60 is connected to the eNB 60 by the UE 90 due to area movement. That is, it is assumed that the UE 90 performs communication connection to the new eNB 60 after moving and receives data.
  • the UE 90 communicates with the eNB 60 and makes a location registration request, the information related to the UE 90 is transferred from the old MME 40 to the new MME 50. Then, the old MME 40 notifies the new MME 50 that the buffering data related to the UE 90 is held in the old S-GW 20.
  • the new MME 50 instructs the creation of a communication path (Indirect Tunnel) for transferring buffering data between the old S-GW 20 and the new S-GW 30 via the old MME 40.
  • a communication path for transferring the buffering data is created, and buffering data (data D indicated as “1” and “2” in FIG. 1) is transmitted from the old S-GW 20 to the new S-GW 30. Is done.
  • the communication path between the P-GW 10 and the new S-GW 30 and the new S-GW 30 and the eNB 60 A process for providing a normal communication path (S1-U Path) is performed.
  • data data D indicated as “3” and “4” in FIG. 1
  • data D is transmitted to the new S-GW 30.
  • the new S-GW 30 transmits the data D “1” “2” transmitted from the old S-GW 20 and the data D “3” “4” transmitted from the P-GW 10 to the UE 90 via the eNB 60. do it.
  • the new S-GW 30 which of the data D “1” and “2” transmitted from the old S-GW 20 and the data D “3” and “4” transmitted from the P-GW 10 is older ( It is not ascertained whether it was sent to UE90 first). Therefore, the order of the data D transmitted from the new S-GW 30 to the UE 90 may be different from the data order of the data originally transmitted to the UE 90. In the example illustrated in FIG.
  • the data D is transmitted to the UE 90 in the order of “3” “4” “1” “2”. Therefore, although the UE 90 can receive the buffering data that has not been received and the data that is transmitted after the location registration, the UE 90 cannot always receive the data in the correct order. For this reason, when the communication system 1 operates as described above, the UE 90 may not be able to properly handle received data.
  • a normal communication path (S1-U) as an original communication path is used as a communication path for connecting the new S-GW 30 and the eNB 60.
  • a forwarding communication path (Forwarding Path) which is a communication path for transferring buffering data.
  • the buffering data transmitted from the old S-GW 20 is transmitted to the eNB 60 via the forwarding path (Forwarding Path), and the data from the P-GW 10 is Suppose that it transmits with respect to eNB60 via the original normal communication path (S1-U Path). Further, the eNB 60 transmits the data transmitted via the forwarding communication path (Forwarding Path) to the UE 90 before the data transmitted via the normal communication path (S1-U Path). I decided to.
  • an end marker that is data indicating the end of the buffering data is transmitted at the end of the buffering data transmitted from the old S-GW 20 to the new S-GW 30.
  • the end marker may be transmitted from the P-GW 10 to the old S-GW 20 or may be automatically added in the old S-GW 20.
  • the new S-GW 30 may be configured to be added after transmission of buffering data is completed.
  • the new S-GW 30 transmits the buffering data to the eNB 60 using the forwarding communication path (Forwarding Path), and the original normal communication path (S1-U Path). ) To transmit data from the P-GW 10 to the eNB 60. And in eNB60, the data transmitted via the communication path for forwarding (Forwarding Path) are transmitted with respect to UE90 previously. Then, after confirming the end marker indicating the end of the buffering data, the data transmitted via the normal communication path (S1-U Path) is transmitted to the UE 90 first. As a result, the data D is transmitted to the UE 90 in the order of “1” “2” “3” “4”.
  • the MME new MME 50
  • the MME includes a transfer path necessity determination unit 51 (transfer communication path necessity determination unit) and a transfer path creation instruction unit (transfer communication path creation unit) 52.
  • the S-GW new S-GW 30
  • the S-GW includes a transfer path creation unit 31 (transfer communication path creation unit) and a transfer processing unit 32.
  • the eNB 60 includes a transfer path creation unit 61 and a data transmission order control unit 62.
  • the MME transfer path necessity determination unit 51 has a function of determining whether or not to create a transfer communication path different from the original normal communication path between the new S-GW 30 and the eNB 60. The determination as to whether or not to create a transfer communication path is made based on information related to buffering data provided from the old MME 40 during the location registration process of the UE 90. That is, when it is notified from the old MME 40 that there is buffering data related to the UE 90, the transfer path necessity determination unit 51 determines that it is necessary to create a transfer communication path for transmitting buffering data. To do. On the other hand, when it is notified from the old MME 40 that there is no buffering data related to the UE 90, the transfer path necessity determination unit 51 determines that it is not necessary to create a transfer path.
  • the transfer path creation instructing unit 52 of the MME creates the transfer communication path for the new S-GW 30 and the eNB 60 when it is determined that the transfer path is to be created as a result of the determination by the transfer path necessity determination unit 51. Has the function of indicating.
  • the transfer path creation instruction unit 52 has a function as a transfer channel creation unit that performs processing related to creation of a transfer channel.
  • the transfer path creation unit 31 of the S-GW has a function of performing processing related to creation of a transfer communication path with the eNB based on the instruction when receiving an instruction related to creation of a transfer communication path from the MME. Have.
  • the transfer path creation unit 31 has a function as a transfer communication path creation unit that performs processing related to creation of a transfer communication path.
  • the S-GW transfer processing unit 32 has a function of transmitting data addressed to the UE 90 transmitted from another S-GW (here, the old S-GW 20) to the eNB via the transfer communication path. .
  • the transfer path creation unit 61 of the eNB When the transfer path creation unit 61 of the eNB receives an instruction related to creation of a transfer communication path from the MME, based on the instruction, the transfer path creation unit 61 performs a process for performing processing related to creation of the transfer communication path with the S-GW. Have.
  • the data transmission order control unit 62 of the eNB has a function of performing control to transmit data transmitted from the S-GW to the UE 90 via the normal communication path and the transfer communication path.
  • the data transmitted from the S-GW via the transfer communication path is first transmitted to the UE 90, and then the data transmitted from the S-GW via the normal communication path. Is transmitted to UE90.
  • the old S-GW 20 holds buffering data related to the UE 90 as shown in FIGS. 1 and 2 (S01). Further, in order to transmit the data addressed to the UE 90 received by the P-GW 10 to the UE 90, communication is possible between the P-GW 10 and the old S-GW 20 and between the old S-GW 20 and the old MME 40. It is assumed that the state has been reached (S02).
  • the UE 90 that has moved across the area where it is located makes a location registration request to the new MME 50 via the eNB 60 corresponding to the new area (TAU Request: S03). Since the location registration request from the UE 90 includes information related to the area where the UE 90 was previously located, based on the information, the new MME 50 sends the location information of the old MME 40 to the old MME 40. A request for processing related to the change is transmitted (Context Request: S04). In response to this, the old MME 40 responds to the new MME 50 (Context Response: S05). At this time, the old MME 40 notifies that the old S-GW 20 has buffering data related to the UE 90. Therefore, the new MME 50 can acquire information regarding the presence / absence of buffering data related to the UE 90.
  • the new MME 50 instructs the new S-GW 30 to create a communication path related to the UE 90 (Create Session Request: S06).
  • the instruction transmitted to the new S-GW 30 is an instruction related to creation of a normal communication path. That is, an instruction related to creation of a communication path with the P-GW 10 and creation of a normal communication path with the eNB 60 is transmitted from the new MME 50 to the new S-GW 30.
  • the new S-GW 30 first performs processing related to switching of the communication path with the P-GW 10 (Modify Bearer Request / Response: S07). As a result, a process of providing a communication path related to the UE 90 between the new S-GW 20 and the P-GW 10 is performed.
  • the P-GW 10 transmits an end marker to the old S-GW 20 via a communication path provided with the old S-GW 20 (End Marker: S08).
  • End Marker S08
  • an end marker is held and used when buffering data is transmitted at a later stage.
  • the new S-GW 30 responds to the new MME 50 that processing related to creation of the communication path related to the UE 90 has been started (Create Session Response: S09).
  • a communication path for transmitting data addressed to the UE 90 between the P-GW 10 and the new S-GW 30 is provided by the processing so far (S10). Therefore, when the P-GW 10 receives data addressed to the UE 90, transmission is appropriately performed to the new S-GW 30.
  • the transfer path necessity determination unit 51 determines whether or not to create a transfer communication path different from the normal communication path between the new S-GW 30 and the eNB 60 (S11). ). As described above, the transfer path necessity determination unit 51 determines necessity based on the information related to the presence / absence of buffering data transmitted from the old MME 40. In the example shown in the present embodiment, information indicating that buffering data exists is notified from the old MME 40 to the new MME 50 (S05). Therefore, the transfer path necessity determination unit 51 determines that a transfer communication path needs to be created. It should be noted that the transfer path necessity determination unit 51 may determine whether or not a transfer communication path needs to be created immediately after notification of information indicating that buffering data exists (S05).
  • the new MME 50 sends a reply corresponding to the location registration request to the eNB 60 and transmits an instruction related to creation of a communication path (Initial Context Setup Request: S12).
  • the instruction relating to creation of the communication path here is an instruction relating to creation of the normal communication path and the transfer communication path. That is, an instruction related to creation of a transfer communication path from the transfer path creation instruction unit 52 based on the determination result in the transfer path necessity determination unit 51 is included.
  • the transfer path necessity determination unit 51 determines that the creation of the transfer communication path is unnecessary, the instruction related to the creation of the communication path includes only the instruction related to the creation of the normal communication path. It is.
  • the eNB 60 notifies the UE 90 that the location registration request has been received (TAU Accept: S13). And in eNB60, while performing the process which concerns on creation of the communication channel for normal, the transfer path creation part 61 performs the process which concerns on creation of the communication channel for transfer. Thereafter, the new MME 50 is notified that preparations corresponding to the instruction relating to creation of the communication path have been made (Initial Context Setup Response: S14). Based on the response from the eNB 60, the new MME 50 instructs the new S-GW 30 to perform processing related to the creation of the normal communication path with the eNB 60 (Modify Bearer Request: S15).
  • a process for creating a normal communication path is performed with the eNB 60 based on an instruction from the new MME 50, and a normal communication path is provided (S1-U Path: S16). Therefore, the data addressed to the UE 90 received by the new S-GW 30 can be transmitted from the new S-GW 30 to the eNB 60 via this normal communication path. And the data which eNB60 received is a state which can be transmitted with respect to UE90.
  • the eNB 60 starts processing for controlling the data transmission order upon receipt of an instruction related to creation of a transfer communication path (S12). That is, the data transmission order control unit 62 performs control to hold data transmitted through the normal communication path in its own device (S17). Therefore, even when the data transmitted from the P-GW 10 to the new S-GW 30 is transmitted to the eNB 60, the transmission to the UE 90 is suspended by holding the data in the eNB 60.
  • the new S-GW 30 notifies the new MME 50 that the processing related to the creation of the normal communication path has been performed (Modify Bearer Response: S18).
  • the new MME 50 instructs the new S-GW 30 to create a communication path for transferring the buffering data held by the old S-GW 20 (Create Indirect Data Forwarding Tunnel Request: S19).
  • the transfer path creation instruction unit 52 of the new MME 50 instructs the new S-GW 30 to create a transfer communication path.
  • the new S-GW 30 performs processing for providing a communication path (Indirect Tunnel) between the old S-GW 20 and the new S-GW 30 based on an instruction from the new MME 50. At the same time, processing related to creation of a transfer communication path may be performed. After that, it responds that the processing has been performed (Create Indirect Data Forwarding Tunnel Response: S20). The new MME 50 further notifies the old MME 40 that has notified that there is buffering data that it is ready to provide a communication path (Indirect Tunnel) between the old S-GW 20 and the new S-GW 30. (Context Ack .: S21).
  • the old MME 40 instructs the old S-GW 20 to create a communication path (Indirect Tunnel) between the old S-GW 20 and the new S-GW 30, and the old S-GW 20
  • the process is executed (Modify Bearer: S22).
  • a communication path (Indirect Tunnel: S23) between the old S-GW 20 and the new S-GW 30 and a forwarding communication path (Forwarding Path: S24) between the new S-GW 30 and the eNB 60 are created.
  • the data received by the eNB 60 is in a state where it can be transmitted to the UE 90. Therefore, the buffering data held by the old S-GW 20 can be transmitted to the UE 90 at this stage.
  • the transfer processing unit 32 of the new S-GW 30 transmits the buffering data to the eNB 60 via the transfer communication path. Then, the data transmission order control unit 62 of the eNB 60 gives priority to the data transmitted from the new S-GW 30 via the transfer communication path to the UE 90 over the data transmitted via the normal communication path. (S25).
  • the old S-GW 20 transmits an end marker to the new S-GW 30 when transmission of the buffering data addressed to the UE 90 is completed. When receiving the end marker, the transfer processing unit 32 of the new S-GW 30 transmits it to the eNB 60 via the transfer communication path in the same manner as the data addressed to the UE 90.
  • the data transmission order control unit 62 of the eNB 60 determines that all buffering data from the old S-GW 20 has been transmitted to the eNB 60, and performs normal communication.
  • the transmission of data transmitted via the path (S1-U Path) to the UE 90 is started (S26). Accordingly, the eNB 60 transmits the buffering data transmitted to the eNB 60 via the transfer communication path to the UE 90, and then transmits the data transmitted to the eNB 60 via the normal communication path to the UE 90. can do.
  • the old MME 40 starts a process related to disconnection of the communication path (S27). Specifically, the old MME 40 instructs the old S-GW 20 to delete the communication path, and the old S-GW 20 performs processing related to the deletion of the communication path (Delete Bearer Request: S28). As a result, on the old S-GW 20 side, the communication path created for deleting the communication path with the P-GW 10 and the transfer of buffering data with the new S-GW 30 (Indirect Tunnel) Is discarded (S29).
  • transfer communication is triggered by reception of the end marker transmitted from the old S-GW 20 and transmission to the eNB 60, or when a predetermined time elapses after the creation of the transfer communication path.
  • the communication path (Indirect Tunnel) created for transferring the buffering data between the path (Forwarding Path) and the old S-GW 20 is discarded (S30).
  • the communication path provided for transmitting the buffering data to the UE 90 is discarded. Note that the communication path between the P-GW 10 and the new S-GW 30 and the normal communication path between the new S-GW 30 and the eNB 60 are continuously used for data transmission to the UE 90.
  • the communication system 1 is connected to the core network, and the area in which the communication system 1 is located is changed from the old area that is the first area to the new area that is the second area.
  • An eNB 60 that controls data transmission addressed to the changed UE 90 (communication terminal), is included in the core network, and functions as a base station apparatus that performs communication connection with the UE 90 in the new area, and the new area
  • a new S-GW 30 and a new MME 50 that function as a communication control device that is provided corresponding to the eNB 60 and transmits a data addressed to the UE 90 to the eNB 60 via the communication path.
  • the communication control apparatus is a buffer that is untransmitted data for the UE 90 that has been in the old area.
  • the transfer path necessity determination unit 51 and the transfer path necessity determination unit 51 of the new MME 50 that determine whether or not a transfer communication path for transferring ring data to the UE 90 is necessary requires a transfer communication path.
  • the transfer path creation instructing unit 52 of the new MME 50 functioning as a transfer channel creating unit that performs processing related to creation of a transfer channel different from the normal channel with the eNB 60, and New S-GW that transmits buffering data that is untransmitted data to eNB 60 that is a base station apparatus using transfer path creation unit 31 of new S-GW 30 and a communication path for transfer It has a transfer processing unit 32 of 0, the.
  • the eNB 60 as the base station device transmits the buffering data addressed to the UE 90 from the new S-GW 30 that is the communication control device via the transfer communication channel, and transmits it via the normal communication channel.
  • a data transmission order control unit 62 that performs control to transmit buffering data to the UE 90 is provided before the data addressed to the UE 90.
  • a transfer communication path for transferring untransmitted data (buffering data) to the UE 90 located in the first area is created between the new S-GW 30 and the eNB 60. It is determined whether or not. As a result of the determination, when the transfer communication path is created, the buffering data is transmitted from the new S-GW 30 to the eNB 60 via the transfer communication path after the transfer communication path is created. Then, in the data transmission order control unit 62 of the eNB 60, when buffering data addressed to the UE 90 is received from the new S-GW 30 via the transfer communication path, the UE 90 transmitted via the normal communication path. The buffering data is transmitted to the UE 90 before the addressed data. That is, according to the communication system 1, the buffering data can be transmitted to the UE 90 before the data transmitted from the new S-GW 30 via the normal communication path.
  • the UE 90 is a communication terminal that intermittently receives data
  • data transmission can be performed appropriately.
  • the unreceived data that was not received when being in the first area before being in the second area and the normal communication path after changing the area to the second area It is possible to receive the transmitted data in the correct order. Therefore, it is possible to reduce the possibility of inconvenience due to the data addressed to the UE 90 being sent in the wrong transmission order.
  • the transfer processing unit 32 of the communication control apparatus transmits an end marker that notifies the end of transmission of untransmitted data after transmitting buffering data that is untransmitted data to the eNB 60 using the transfer channel. Send to.
  • the data transmission order control unit 62 of the eNB 60 controls the transmission of data addressed to the UE 90 transmitted via the normal communication path to the UE 90 when the end of transmission of the untransmitted data is notified by reception of the end marker. I do.
  • the end of transmission of untransmitted data is notified from the new S-GW 30 which is a communication control apparatus to the eNB 60 functioning as a base station apparatus, and based on the notification, the eNB 60 uses the normal communication path to the UE 90
  • the eNB 60 uses the normal communication path to the UE 90
  • the communication control device is configured by S-GW and MME has been described.
  • the number of devices that function as communication control devices may be three or more.
  • the communication control device may be realized by a single device.
  • the new S-GW 30 has a function as the transfer path necessity determination unit 51 in the new MME 50, a communication control device can be realized by the new S-GW 30.
  • the end marker for notifying the end of the transmission of buffering data is transmitted from the P-GW 10 to the old S-GW 20, and then the buffering data from the old S-GW 20 to the new S-GW 30 is transmitted.
  • the configuration for notifying the end of transmission and the end of transmission of buffering data from the new S-GW 30 to the eNB 60 has been described.
  • which device creates the end marker and starts transmission is not particularly limited. If at least the new S-GW 30 has notified the eNB 60 of the end of transmission of buffering data, the eNB 60 can end the standby state of the buffering data transmitted via the transfer communication path. .
  • the normal communication path is created before the transfer communication path, and data transmitted from the P-GW 10 to the new S-GW 30 is transmitted to the eNB 60 first.
  • the order of creating the normal communication path and the transfer communication path is not particularly limited. Regardless of the order of creation of the normal communication path and the transfer communication path, the eNB 60 transmits the buffering data transmitted from the new S-GW 30 via the transfer communication path to the UE 90, and then performs normal communication. By transmitting the data transmitted from the new S-GW 30 via the path to the UE 90, it is possible to prevent the data from being transmitted in the wrong order.
  • each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by the plurality of devices.
  • the new S-GW 30, the new MME 50, the eNB 60, etc. may function as a computer that performs the processing of the present embodiment.
  • FIG. 6 is a diagram illustrating an example of a hardware configuration of the new S-GW 30, the new MME 50, and the eNB 60 according to the present embodiment.
  • the above-described new S-GW 30, new MME 50, and eNB 60 are physically configured as computer devices including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. Also good.
  • the term “apparatus” can be read as a circuit, a device, a unit, or the like.
  • the hardware configuration of the new S-GW 30, the new MME 50, and the eNB 60 may be configured to include one or a plurality of the devices illustrated in the figure, or may be configured not to include some devices. .
  • Each function in the new S-GW 30, the new MME 50, and the eNB 60 is performed by causing the processor 1001 to perform computation by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and performing communication by the communication device 1004. Alternatively, it is realized by controlling data reading and / or writing in the memory 1002 and the storage 1003.
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
  • the transfer path necessity determination unit 51 in the new MME 50 may be realized by the processor 1001.
  • the processor 1001 reads programs (program codes), software modules, and data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these.
  • programs program codes
  • software modules software modules
  • data data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these.
  • the program a program that causes a computer to execute at least a part of the operations described in the above embodiments is used.
  • the data transmission order control unit 62 of the eNB 60 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be realized similarly for other functional blocks.
  • the above-described various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001.
  • the processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.
  • the memory 1002 is a computer-readable recording medium and includes, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to the embodiment of the present invention.
  • the storage 1003 is a computer-readable recording medium such as an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • the storage medium described above may be, for example, a database, server, or other suitable medium including the memory 1002 and / or the storage 1003.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like.
  • the transfer path creation instruction unit 52 of the new MME 50 described above may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured with a single bus or may be configured with different buses between devices.
  • the new S-GW30, new MME50, and eNB60 are microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), FPGAs (Field Programmable Gate Arrays). Or a part of each functional block may be realized by the hardware.
  • the processor 1001 may be implemented by at least one of these hardware.
  • notification of information is not limited to the aspect / embodiment described in this specification, and may be performed by other methods.
  • notification of information includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.
  • the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
  • Each aspect / embodiment described in this specification includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • SUPER 3G IMT-Advanced
  • 4G 5G
  • FRA Full Radio Access
  • W-CDMA Wideband
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access 2000
  • UMB User Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 UWB (Ultra-WideBand
  • the present invention may be applied to a Bluetooth (registered trademark), a system using another appropriate system, and / or a next generation system extended based on the system.
  • the specific operation that is performed by a specific device in this specification may be performed by the upper node in some cases.
  • Information etc. can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
  • the input / output information or the like may be stored in a specific location (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.
  • the determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a true / false value (Boolean: true or false), or may be performed by comparing numerical values (for example, a predetermined value) Comparison with the value).
  • notification of predetermined information is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.
  • software, instructions, etc. may be transmitted / received via a transmission medium.
  • software may use websites, servers, or other devices using wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave.
  • wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave.
  • DSL digital subscriber line
  • wireless technology such as infrared, wireless and microwave.
  • the channel and / or symbol may be a signal.
  • the signal may be a message.
  • the component carrier (CC) may be called a carrier frequency, a cell, or the like.
  • system and “network” used in this specification are used interchangeably.
  • information, parameters, and the like described in this specification may be represented by absolute values, may be represented by relative values from a predetermined value, or may be represented by other corresponding information.
  • the radio resource may be indicated by an index.
  • User terminals can be obtained by those skilled in the art from subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless It may also be called terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology.
  • determining may encompass a wide variety of actions. “Judgment” and “decision” are, for example, judgment, calculation, calculation, processing, derivation, investigating, searching (looking up) (for example, table , Searching in a database or another data structure), considering ascertaining as “determining”, “deciding”, and the like.
  • determination and “determination” include receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (accessing) (e.g., accessing data in a memory) may be considered as "determined” or "determined”.
  • determination and “decision” means that “resolving”, “selecting”, “choosing”, “establishing”, and “comparing” are regarded as “determining” and “deciding”. May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.
  • connection means any direct or indirect connection or coupling between two or more elements and It can include the presence of one or more intermediate elements between two “connected” or “coupled” elements.
  • the coupling or connection between the elements may be physical, logical, or a combination thereof.
  • the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-inclusive examples
  • electromagnetic energy such as electromagnetic energy having a wavelength in the region, microwave region, and light (both visible and invisible) region, it can be considered to be “connected” or “coupled” to each other.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot depending on an applied standard.
  • RS Reference Signal
  • the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to the element does not generally limit the quantity or order of the elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, a reference to the first and second elements does not mean that only two elements can be employed there, or that in some way the first element must precede the second element.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un système de communication (1) qui comprend : un eNB (60) servant de dispositif de station de base; une nouvelle S-GW (30) servant de dispositif de commande de communication; et une nouvelle MME (50). Le dispositif de commande de communication comprend : une unité de détermination de nécessité chemin de transfert (51) qui détermine la nécessité d'un chemin de communication de transfert pour transférer des données de mise en mémoire tampon pour un UE (90) à l'UE (90); une unité d'instruction de création de chemin de transfert (52) et une unité de création de chemin de transfert (31) qui effectuent un traitement concernant la création d'un chemin de communication de transfert entre le dispositif de commande de communication et l'eNB (60); et une unité de traitement de transfert (32) qui transmet, par l'intermédiaire du chemin de communication de transfert, des données de mise en mémoire tampon qui sont des données qui n'ont pas été transmises à l'eNB (60). De plus, l'eNB (60) comprend une unité de commande d'ordre de transmission de données (62) qui, si des données de mise en mémoire tampon adressées à l'UE (90) est reçue par l'intermédiaire du trajet de communication de transfert, effectue une commande pour transmettre les données de mise en mémoire tampon à l'UE (90) avant que des données ne soient transmises par l'intermédiaire d'un chemin de communication ordinaire.
PCT/JP2018/012963 2017-04-06 2018-03-28 Système de communication Ceased WO2018186270A1 (fr)

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CN105874830B (zh) * 2014-11-04 2019-10-25 华为技术有限公司 一种移动性管理的方法、装置及系统
CN106332189B (zh) * 2015-06-29 2020-03-06 中兴通讯股份有限公司 一种转发数据的实现方法和装置

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