WO2011093499A1 - データ中継装置及びデータ中継方法 - Google Patents
データ中継装置及びデータ中継方法 Download PDFInfo
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- WO2011093499A1 WO2011093499A1 PCT/JP2011/051949 JP2011051949W WO2011093499A1 WO 2011093499 A1 WO2011093499 A1 WO 2011093499A1 JP 2011051949 W JP2011051949 W JP 2011051949W WO 2011093499 A1 WO2011093499 A1 WO 2011093499A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1083—In-session procedures
- H04L65/1086—In-session procedures session scope modification
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/08—Upper layer protocols
- H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
Definitions
- the present invention relates to a data relay apparatus and a data relay method for relaying data transmitted to a mobile device connected to a mobile communication network.
- Patent Document 1 Conventionally, as a communication system in which a mobile device communicates via a mobile communication network, for example, there is one described in Patent Document 1.
- This communication system is installed on a communication path between a data relay device (SGSN) that controls communication between a network and a mobile device, and between the mobile device and the data relay device, and performs wireless control that communicates with the mobile device by radio. And the device.
- SGSN data relay device
- this communication system is connected for communication using SIP (Session Initiated Protocol), and a communication session is established by call control to transmit / receive information data (call data, etc.) between mobile devices. It has been broken.
- SIP Session Initiated Protocol
- the mobile device A and the radio control device Wireless communication may be cut off.
- the SIP control device side that performs call control notifies the mobile device B on the communication partner side of disconnection of wireless communication.
- the SIP control device side determines whether or not the communication is disconnected by performing a non-communication monitoring process for monitoring whether or not the call data is transmitted from the mobile device A.
- the mobile device B stops the call data transmission to the mobile device A and ends the communication.
- the mobile device B is in the out-of-service state.
- the data relay device performs a reconnection process with the mobile device A that is out of the communication range, and tries to restore communication.
- the data relay device is connected to the mobile device A that has been in the service area again.
- Call data to be transmitted (including call data transmitted from the mobile device B to the data relay device when the mobile device A is outside the communication range) is transmitted.
- the mobile device A that has been disconnected deletes call information (information related to a communication session) that was performed before disconnection. For this reason, for the mobile device A, the call data transmitted from the data relay device after being in the service area again is unnecessary call data whose source or the like is unknown, and the call data has been discarded. .
- communication established for call communication transmits this data even though the data that has reached the mobile device after the wireless communication is disconnected is discarded. Therefore, there is a problem that wireless communication resources are wasted because the wireless communication is established between the wireless control device and the mobile device.
- an object of the present invention is to provide a data relay device and a data relay method that can reduce the consumption of useless resources in wireless communication.
- the present invention is a data relay device that is included in a mobile communication network and relays data transmitted to a mobile device, and includes a communication type determination unit that determines a type of communication performed by the mobile device, Disconnection detecting means for detecting that a wireless connection between the mobile apparatus and the mobile communication network is disconnected during communication of the mobile apparatus, receiving means for receiving data for the mobile apparatus, and disconnection detecting means Whether or not to relay the data according to the type of communication determined by the communication type determining means when receiving data for the mobile device by the receiving means when detecting that the wireless connection is disconnected by And a relayability determination unit that determines whether or not.
- the present invention is a data relay method in a data relay apparatus that is included in a mobile communication network and relays data transmitted to a mobile device, and determines the type of communication performed by the mobile device
- a type determining step ; a disconnection detecting step for detecting disconnection of a wireless connection between the mobile device and the mobile communication network while the mobile device is communicating; and a receiving step for receiving data for the mobile device
- the data of the data is determined according to the type of communication determined in the communication type determining step.
- a relay availability determination step for determining whether or not to perform relaying.
- the data relay device when it receives data for the mobile device when it detects that the wireless connection is disconnected during communication, it determines whether to relay the data according to the type of communication. And relay data according to the judgment. As a result, relaying of data can be stopped in a communication type such as call communication in SIP, so that unnecessary data is not transmitted to the mobile device, and it is possible to reduce useless resources of wireless communication. It becomes.
- the relay availability determination unit is configured to receive the data for the mobile unit received by the reception unit when the disconnection detection unit detects that the wireless connection is disconnected, and the communication type determination unit It is preferable to determine whether or not to relay the data depending on the type of communication.
- the data relay device determine whether or not to relay the data in consideration of the data for the mobile device received by the receiving means. For this reason, it becomes possible to relay appropriately according to data.
- FIG. 1 is a diagram illustrating an overall configuration of a communication system.
- the communication system 1 shown in FIG. 1 performs data communication by GPRS (General Packet Radio Service). Therefore, the communication system 1 includes an SGSN (Serving GPRS Support Node) 30 and a radio network controller 20.
- a GPRS network (IP-CAN) 50 as a mobile communication network is configured including the radio control device 20 and the SGSN 30.
- the communication system 1 includes a mobile device 10 connected to the GPRS network 50 and an NW (network) 40 different from the GPRS network 50.
- NW network
- NW40 is demonstrated to an example as the other party who communicates with the mobile device 10, another mobile device other than NW40 may be sufficient.
- the connection between the mobile device 10 and the NW 40 indicates that another communication device (for example, a media server, another mobile device, or the like) is connected through the mobile device 10 and the NW 40.
- the wireless control device 20 controls wireless communication between the mobile device 10 and the GPRS network 50, and wireless connection is performed between a base station (not shown) managed by the wireless control device 20 and the mobile device 10. .
- the radio control device 20 transmits data transmitted from the SGSN 30 to the mobile device 10 by wireless communication, and transmits data transmitted from the mobile device 10 by wireless communication to the SGSN 30.
- the wireless control device 20 detects this and transmits a communication disconnection signal indicating that the wireless communication is disconnected to the SGSN 30.
- the mobile device 10 and the SGSN 30 maintain the GPRS PDP (Packet Data Protocol) information (although the IP communication path established by GPRS is maintained), but the preservation state in which only the radio part is released. Become.
- GPRS PDP Packet Data Protocol
- the SGSN 30 functions as a data relay device that relays data transmitted and received between the mobile device 10 and the NW 40.
- the SGSN 30 includes a reception unit 32 (reception unit) that receives data transmitted from the NW 40 and the mobile device 10, a communication control unit 31 that transmits data received by the reception unit 32 to the mobile device 10 or the NW 40, and a mobile device.
- 10 includes a communication type determination unit 33 (communication type determination unit) that determines the type of communication performed by the network 10.
- the SGSN 30 acquires subscriber information of the mobile device 10 when the location of the mobile device 10 is registered.
- the communication control unit 31 transmits data in consideration of this subscriber information.
- the SGSN 30 includes a disconnection detection unit 34 (disconnection detection unit) that detects that the wireless connection between the mobile device 10 and the GPRS network 50 is disconnected while the mobile device 10 is communicating, and a disconnection detection unit 34.
- a disconnection detection unit 34 disconnection detection unit
- a relay availability determination unit 35 relay availability determination means
- the communication type determination unit 33 determines a communication type (call type) established between the mobile device 10 and the NW 40 for each communication, and stores the communication type in association with each communication.
- the type of communication indicates the nature of data transmitted through the communication (communication path, call).
- the mobile device 10 may perform, for example, two communications of call communication and streaming at the same time.
- the communication type (call communication, streaming) is stored in association with each communication. Yes.
- the communication type determination unit 33 determines the communication type based on a signal used when establishing an IP communication path by GPRS when communication between the mobile device 10 and the NW 40 is started. Is.
- FIG. 2 is a diagram illustrating a signal flow until a SIP communication connection is established between the mobile device 10 and the NW 40.
- step S ⁇ b> 101 the mobile device 10 transmits “SM_Activate PDP Context Request” requesting the SGSN 30 to start communication via the wireless control device 20.
- step S ⁇ b> 102 the SGSN 30 transmits “RANAP_RAB Assignment Request (radio access bearer allocation request)” to the radio network controller 20.
- step S103 the radio network controller 20 transmits “RANAP_RAB Assignment Response (radio access bearer allocation response) to the SGSN 30.
- step S104 the SGSN 30 transmits“ SM_Activate PDP Context Accept ”that permits a request to start communication. 20 to the mobile device 10.
- step S105 the mobile device 10 transmits “SIP_Register” for registering itself to a SIP control device (not shown) so that a communication connection by SIP can be established.
- the “SM_Activate PDP Context Request” transmitted from the mobile device 10 to the SGSN 30 includes an APN (Access Point Name).
- APN is the name of an access point when connecting a communication device to a network.
- the communication type determination unit 33 stores in advance correspondence information in which an APN and a communication type are associated with each other. The communication type determination unit 33 determines and stores the communication type from the correspondence information and the APN included in the “SM_Activate PDP Context Request”.
- an APN and a communication type have a one-to-one correspondence.
- a plurality of communication types may be associated with one APN. In this case, it is possible to determine the type of communication based on information other than APN among signals transmitted and received when establishing a communication connection.
- the communication control unit 31 identifies the received data is data that is transmitted and received by which communication device, and transmits the data to the identified transmission destination through the identified communication. .
- the communication control unit 31 specifies data that is transmitted and received between the mobile device 10 and the NW 40, and specifies which communication is performed between the mobile device 10 and the NW 40.
- the communication control unit 31 transmits the data received by the reception unit 32 to the mobile device 10 or the NW 40.
- this communication is specified based on the received data, from the TEID (Tunnel Endpoint IDentifier) of the GTP (GPRS Tunneling Protocol) header of the received data, which communication of which mobile device. It is possible to specify whether the data is transmitted / received by.
- the communication control unit 31 when receiving an instruction from the relay availability determination unit 35 to stop relaying data transmitted / received in a certain communication, the communication control unit 31 moves the data that has been instructed to stop relaying. The transmission to the machine 10 is stopped. In addition, the communication control unit 31 discards the data for which the relay stop instruction has been issued.
- the disconnection detection unit 34 detects that the wireless connection between the mobile device 10 and the GPRS network 50 has been disconnected based on whether a communication disconnection signal is transmitted from the wireless control device 20.
- the relay availability determination unit 35 determines whether or not to relay the data addressed to the mobile device 10 received by the reception unit 32, and performs relaying. If not, the communication control unit 31 is instructed to stop relaying. Note that the communication that has been disconnected is specified by the communication control unit 31, and therefore the relay availability determination unit 35 is stored in the communication specified by the communication control unit 31 and the communication type determination unit 33. Based on the information associated with the type of communication for each communication, the type of communication in which the wireless communication is disconnected can be grasped. The relay availability determination unit 35 stores in advance communication type correspondence information in which the type of communication is associated with whether or not to relay. Therefore, the relay availability determination unit 35 can determine whether to relay data based on the communication type correspondence information and the grasped communication type.
- Conversational real-time bidirectional communication
- TV phone communication for example, “Streaming” (real-time one-way communication) used in streaming, broadcasting, etc., for example, And “Interactive” (bidirectional communication) used in Web browsing and the like.
- Other communications include “Background” used for data download, e-mail, telemetry, and the like.
- the relay possibility determination unit 35 may re-establish communication after disconnecting wireless communication and transmit data to the mobile device 10. Since the mobile device 10 discards the data, it is determined that the data is not relayed.
- the relay availability determination unit 35 determines that the data is relayed by executing the process of reestablishing the communication.
- the relay availability determination unit 35 further determines whether or not to relay data based on the data contents.
- the relay possibility determination unit 35 stores in advance data type correspondence information in which data contents are associated with whether or not to relay. For this reason, the relay availability determination unit 35 refers to the content (data type and property) of the data received by the reception unit 32 and determines whether to relay data based on the data type correspondence information. .
- the relay availability determination unit 35 establishes a new connection when the content of the data is data (control data, C-Plane data) for making a new connection such as a signal related to SIP connection. Therefore, it is determined that data is relayed.
- the content of the data is data related to media such as voice (user data, U-plane data)
- the relay availability determination unit 35 re-establishes the communication after disconnecting the wireless communication and performs the mobile station 10. Even if data is transmitted to the mobile station 10, it is determined that the data is not relayed because the mobile device 10 discards the data.
- a control signal is notified by SIP, and data related to media such as voice is transmitted / received by RTP (Real-Time Transport Protocol) / RTCP (RTP Control Protocol).
- RTP Real-Time Transport Protocol
- RTCP RTP Control Protocol
- it can relay appropriately according to data.
- a method of determining whether the data content is data related to communication connection or the like and relaying is performed for example, it is determined from the header of the IP layer of the data (packet) to be relayed, There is a method of judging from the inside of a packet, that is, from a UDP (User Datagram Protocol) layer or a TCP (Transmission Control Protocol) layer, or judging from the presence or absence of an RTP header.
- the determination is made from the DSCP (Differentiated Services Code Point) field of the IP layer.
- FIG. 3 is a hardware configuration diagram of the SGSN 30.
- the SGSN 30 physically includes a CPU 251, a RAM 252 and a ROM 253 as main storage devices, an auxiliary storage device 254 such as a hard disk, a communication interface 255 as a data transmission / reception device such as a network card, and the like. It is configured as a system.
- Each of the functions of the SGSN 30 described above performs communication by operating the communication interface 255 under the control of the CPU 251 by reading predetermined computer software on the hardware such as the CPU 251 and the RAM 252 shown in FIG. This is realized by reading and writing data in the RAM 252 and the auxiliary storage device 254.
- FIG. 4 is a flowchart showing a flow of relay permission / inhibition determination processing that is performed when data addressed to the mobile device 10 arrives at the SGSN 30. 4 is always executed while data is being relayed by the SGSN 30. Data is assumed to reach the SGSN 30 for each packet.
- step S201 reception step
- the reception unit 32 receives the data transmitted from the NW 40.
- step S ⁇ b> 202 the communication control unit 31 specifies which data of which communication device is used to transmit / receive data received by the reception unit 32 as described above. Here, it is assumed that the reception unit 32 has received data to be transmitted to the mobile device 10.
- step S203 the disconnection detection unit 34 disconnects the wireless communication (in this case, wireless communication between the mobile device 10 and the wireless control device 20) used to transmit the data received in step S201. Make a decision. Specifically, the disconnection detection unit 34 determines whether a communication disconnection signal has been received from the wireless control device 20 as described above. When the communication disconnection signal has not been received, that is, when the wireless communication has not been disconnected (step S203: NO), the process proceeds to step S207. On the other hand, when the communication disconnection signal is received (step S203: YES), it is determined that the wireless communication is disconnected, and the process proceeds to step S204.
- the wireless communication in this case, wireless communication between the mobile device 10 and the wireless control device 20
- step S204 the relay determination unit 35 determines whether the type of communication for which wireless communication has been disconnected is a relay stop target. Specifically, the relay availability determination unit 35 includes the information stored in the communication type determination unit 33 (communication type information associated with each communication) and the communication of the mobile device 10 identified in step S202. Thus, the type of communication is determined. Then, the relay availability determination unit 35 determines whether to stop the relay based on the communication type and the communication type correspondence information in which the communication type stored in advance and whether or not to perform relaying are associated with each other. Determine if there is. If the type of communication is not a relay stop target (step S204: NO), the process proceeds to step S208. On the other hand, when the communication type is a relay stop target (step S204: YES), the process proceeds to step S205.
- the communication type is a relay stop target
- step S205 the relay permission determination section 35 further determines whether or not the data is a relay stop target based on the content of the data received by the reception section 32. Specifically, as described above, the relay availability determination unit 35 moves the data received by the reception unit 32 based on the data type correspondence information in which the content of data is associated with whether or not to relay. Whether to transmit to the machine 10 is determined. If the data content is not a relay stop target (step S205: NO), the process proceeds to step S208. On the other hand, if the data content is a relay stop target (step S205: YES), the process proceeds to step S206.
- step S206 the relay possibility determination unit 35 instructs the communication control unit 31 to stop the transmission of the data, and discards the data. After discarding the data, the process returns to step S201 to repeat the above process.
- step S207 the communication control unit 31 transmits the data to the mobile device 10 through the communication specified in step S201.
- step S208 the communication control unit 31 reconnects wireless communication with the mobile device 10 and moves the data when wireless communication is established. To the machine 10. Specifically, the reconnection is performed, for example, by transmitting a paging signal to the mobile device 10 as in the conventional case.
- the data received by the receiving unit 32 when the wireless communication is disconnected is “Conversational” such as call communication, for example, and the content of the data is call data, this data Is discarded without being transmitted to the mobile device 10.
- the type of communication is “Streaming” such as streaming, this data is transmitted by reconnecting to the mobile device 10.
- the type of communication is a relay stop target, if the content of this data is data relating to communication connection, for example, this data is transmitted by reconnecting to the mobile device 10.
- FIG. 5 is a diagram showing a data flow between the nodes.
- SIP communication is established as a communication type.
- step S301 When communication is started and a connection request signal or the like is transmitted / received between the mobile device 10 and the NW 40, SIP communication is established between the mobile device 10 and the NW 40 as shown in step S301.
- the communication type determination unit 33 of the SGSN 30 determines the type of communication between the mobile device 10 and the NW 40 (communication type determination step). Thereby, in step S301 and subsequent steps, the SGSN 30 relays the call data between the mobile device 10 and the NW 40, thereby enabling a call between the mobile device 10 and the NW 40.
- the wireless control device 20 detects the disconnection of the wireless communication in a non-communication monitoring process or the like in step S304. Further, when the wireless communication is disconnected in step S302, the mobile device 10 detects the disconnection of the wireless communication in step S303 based on the communication state or the like. Furthermore, when the mobile device 10 detects disconnection of the wireless communication, the mobile device 10 stops transmitting data by wireless communication, deletes call information and the like in SIP, and ends the call communication.
- the wireless control device 20 transmits “Iu Release Request” as a communication disconnection signal indicating the disconnection of the wireless communication to the SGSN 30 in step S305.
- the disconnection detection unit 34 of the SGSN 30 determines that the wireless communication between the mobile device 10 and the wireless control device 20 is disconnected in Step S306 (disconnection detection step). If the SGSN 30 determines that the wireless communication is disconnected, the SGSN 30 determines whether to transmit data to the mobile device 10 based on the type of communication and the content of the data. Here, it is assumed that data transmission is stopped. As a result, the SGSN 30 discards the data addressed to the mobile device 10 received when the wireless communication is disconnected. Note that the SGSN 30 determines whether to relay data to the mobile device 10 described with reference to FIG. 4 after the call communication is established in step S301 in FIG. It is executed every time it is received.
- the SGSN 30 transmits “Iu Release Command”, which is a control signal for stopping the wireless communication, to the wireless control device 20 in step S307.
- the wireless control device 20 transmits “Iu Release Complete” indicating that the stop of wireless communication is completed to the SGSN 30 in Step S308.
- step S306 After the relay of data addressed to the mobile device 10 is stopped by the wireless control device 20 (step S306), a communication stop request is made to the NW 40 by the RTCP no-communication monitoring process or the like by the SIP control device, and in step S309 The NW 40 stops transmission of data addressed to the mobile device 10.
- the SGSN 30 moves the mobile device. 10, the call data is not transmitted to the mobile device 10.
- the mobile device 10 since the mobile device 10 has deleted the call information in SIP after the end of the communication due to the disconnection of the wireless communication (step S303), the mobile device 10 was transmitted through the communication performed before the disconnection of the wireless communication. Even if the data is received, the contents of the data cannot be grasped, and the data is discarded.
- the SGSN 30 since the SGSN 30 does not transmit data discarded by the mobile device 10 after step S306, it is possible to reduce the use of unnecessary resources for wireless communication.
- action and effect of the communication system 1 concerning this embodiment are demonstrated.
- the communication system 1 of the present embodiment when the SGSN 30 detects that the wireless connection with the mobile device 10 is disconnected by the disconnection detection unit 34, the reception unit 32 receives data for the mobile device 10, The relay availability determination unit 35 determines whether to relay the data according to the type of communication determined by the communication type determination unit 33, and relays data according to the determination. As a result, relaying of data can be stopped in communication types such as SIP call communication, so that unnecessary data is not transmitted to the mobile device 10 and it is possible to reduce consumption of wireless communication resources. Become.
- the data relay device determines whether or not to relay the data in consideration of the data for the mobile device 10 received by the receiving unit 32. Therefore, for example, SIP control data is relayed, and data such as voice is not relayed, so that it is possible to relay appropriately according to the data. However, the relay of data may be stopped only by determination based on the type of communication without considering the data for the mobile device 10 received by the receiving unit 32.
- the present invention is not limited to the above embodiments.
- FIG. 5 the case where SIP is used has been described as an example, but the present invention can be applied to other communication methods.
- the GPRS network 50 has been described as an example of the communication network.
- the present invention is not limited to this, and a system (for example, LTE) that requires line setting (line disconnection / line connection) in a wireless section. It is also effective in EPS).
- the types of communication are not limited to the above four types, and the type of communication that relays data is not limited to the above.
- the determination as to whether or not to relay data is performed by the relay availability determination unit 35 of the SGSN 30, but this determination may be performed by another device.
- a GGSN Gateway GPRS Support Node
- GGSN Gateway GPRS Support Node
- the determination result in the GGSN is notified to the SGSN 30, and control for stopping communication is performed.
- 10 mobile device, 30 ... SGSN, 32 ... receiving unit, 33 ... communication type determination unit, 34 ... disconnection detection unit, 35 ... relay determination unit, 50 ... GPRS network.
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Abstract
Description
実施形態に係る通信システム1の全体構成について説明する。図1は、通信システムの全体構成を示す図である。ここで、図1に示す通信システム1は、GPRS(General Packet Radio Service)によるデータ通信が行われる。そのため、通信システム1は、SGSN(Serving GPRS Support Node)30と、無線制御装置20とを含んで構成される。この無線制御装置20とSGSN30とを含んで移動体通信網としてのGPRS網(IP-CAN)50が構成されている。また、通信システム1は、GPRS網50に接続される移動機10及びGPRS網50とは異なるNW(ネットワーク)40を含んで構成される。なお、移動機10と通信を行う相手としてNW40を例に説明するが、NW40以外にも他の移動機であってもよい。また、移動機10とNW40とが接続されるとは、移動機10とNW40を介して別の通信装置(例えば、メディアサーバ、別の移動機等)とが通信接続されることを指す。
次に、中継可否判断部35が、NW40から送信されたデータを移動機10へ中継するか否かの判断処理の流れについて説明する。図4は、SGSN30に移動機10宛のデータが届いたときに行われる中継可否判断処理の流れを示すフローチャートである。なお、図4に示す中継可否判断処理は、SGSN30によってデータの中継が行われている間は常に実行されているものである。また、データは、パケット毎にSGSN30に届くものとする。
次に、無線通信の切断後にSGSN30によってデータの中継が停止される場合、即ち、無線通信の切断後に再接続が行われない場合における各ノード間のデータの流れについて説明する。図5は、各ノード間のデータの流れを示す図である。また、ここでは、通信の種別としてSIPによる通話通信が確立されているものとする。
続いて、本実施形態にかかる通信システム1の作用及び効果について説明する。本実施形態の通信システム1によれば、SGSN30が、切断検出部34によって移動機10との無線接続が切断されたことを検出した際に、受信部32が移動機10に対するデータを受信すると、中継可否判断部35は、通信種別判断部33によって判断された通信の種別によって当該データの中継を行うか否かを判断し、判断に応じてデータの中継を行う。これにより、SIPにおける通話通信のような通信の種別ではデータの中継が停止できるため、移動機10に不要なデータが送信されることがなくなり、無線通信のリソースの消費を低減することが可能となる。特に、衛星電話など、移動機10と無線制御装置20との間を衛星を介して通信を行う場合には、無線区間のリソースが限られているため、本実施形態を適用することは非常に好適である。また、移動機10側にも、不要なデータが送信されることがなくなるため、移動機10の処理負担を低減させることができる。
Claims (3)
- 移動体通信網に含まれて、移動機に送信されるデータを中継するデータ中継装置であって、
前記移動機が行っている通信の種別を判断する通信種別判断手段と、
前記移動機が通信中に当該移動機と前記移動体通信網との間の無線接続が切断されたことを検出する切断検出手段と、
前記移動機に対するデータを受信する受信手段と、
前記切断検出手段によって前記無線接続が切断されたことを検出した際に前記受信手段によって前記移動機に対するデータを受信すると、前記通信種別判断手段によって判断された前記通信の種別によって当該データの中継を行うか否かを判断する中継可否判断手段と、を備えるデータ中継装置。 - 前記中継可否判断手段は、前記切断検出手段によって前記無線接続が切断されたことを検出した際に前記受信手段が受信する前記移動機に対するデータと、前記通信種別判断手段によって判断された前記通信の種別と、によって当該データの中継を行うか否かを判断することを特徴とする請求項1に記載のデータ中継装置。
- 移動体通信網に含まれて、移動機に送信されるデータを中継するデータ中継装置におけるデータ中継方法であって、
前記移動機が行っている通信の種別を判断する通信種別判断ステップと、
前記移動機が通信中に当該移動機と前記移動体通信網との間の無線接続が切断されたことを検出する切断検出ステップと、
前記移動機に対するデータを受信する受信ステップと、
前記切断検出ステップにおいて前記無線接続が切断されたことを検出した際に前記受信ステップにおいて前記移動機に対するデータを受信すると、前記通信種別判断ステップにおいて判断された前記通信の種別によって当該データの中継を行うか否かを判断する中継可否判断ステップと、を備えるデータ中継方法。
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CN2011800067148A CN102714876A (zh) | 2010-02-01 | 2011-01-31 | 数据中继装置及数据中继方法 |
US13/575,628 US20120314586A1 (en) | 2010-02-01 | 2011-01-31 | Data relaying apparatus and data relaying method |
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WO2018139888A1 (ko) * | 2017-01-29 | 2018-08-02 | 엘지전자 주식회사 | 단말 컨텍스트의 관리 방법 및 이를 지원하는 장치 |
US10784986B2 (en) | 2017-02-28 | 2020-09-22 | Intel Corporation | Forward error correction mechanism for peripheral component interconnect-express (PCI-e) |
US10771189B2 (en) | 2018-12-18 | 2020-09-08 | Intel Corporation | Forward error correction mechanism for data transmission across multi-lane links |
US11637657B2 (en) | 2019-02-15 | 2023-04-25 | Intel Corporation | Low-latency forward error correction for high-speed serial links |
US11249837B2 (en) | 2019-03-01 | 2022-02-15 | Intel Corporation | Flit-based parallel-forward error correction and parity |
US11296994B2 (en) | 2019-05-13 | 2022-04-05 | Intel Corporation | Ordered sets for high-speed interconnects |
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JP2002152835A (ja) * | 2000-11-13 | 2002-05-24 | Matsushita Electric Ind Co Ltd | 移動端末装置 |
JP2007513551A (ja) * | 2003-12-05 | 2007-05-24 | リサーチ イン モーション リミテッド | 無線通信装置に宛てた不要なトラフィックを制御する装置および方法 |
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JP2007081678A (ja) * | 2005-09-13 | 2007-03-29 | Ntt Docomo Inc | データ中継装置及びデータ中継方法 |
CN101326837A (zh) * | 2005-12-14 | 2008-12-17 | 松下电器产业株式会社 | 通信装置和越区切换方法 |
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JP2002152835A (ja) * | 2000-11-13 | 2002-05-24 | Matsushita Electric Ind Co Ltd | 移動端末装置 |
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