WO2009090983A1 - ゲートウェイ装置およびシステム、並びに、通信方法 - Google Patents
ゲートウェイ装置およびシステム、並びに、通信方法 Download PDFInfo
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- WO2009090983A1 WO2009090983A1 PCT/JP2009/050431 JP2009050431W WO2009090983A1 WO 2009090983 A1 WO2009090983 A1 WO 2009090983A1 JP 2009050431 W JP2009050431 W JP 2009050431W WO 2009090983 A1 WO2009090983 A1 WO 2009090983A1
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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
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
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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
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
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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
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1023—Media gateways
- H04L65/103—Media gateways in the network
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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
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1033—Signalling gateways
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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
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1033—Signalling gateways
- H04L65/104—Signalling gateways in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
- H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
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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
- H04W88/12—Access point controller devices
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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
- H04W88/16—Gateway arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/02—Inter-networking arrangements
Definitions
- the present invention connects a radio base station controller (RNC: Radio Network Controller) and a fixed network or an IMS (IP Multimedia Subsystem) core network in a cellular phone network to provide multimedia services such as voice services and videophones.
- RNC Radio Network Controller
- IMS IP Multimedia Subsystem
- the present invention relates to a gateway device for realizing.
- Mobile phone terminals and mobile phone networks that use third-generation W-CDMA technology use circuit switched networks or circuit switched protocols to implement voice calls and videophones.
- the IMS When providing multimedia services in a circuit switched network using IMS, it is necessary to connect the IMS core network to the circuit switched network. In this case, the flow control communication protocol used on the IMS side is different from the protocol in the circuit switched network. Therefore, even if the frame signal of the multimedia service is supplied from the circuit switching network, the IMS cannot appropriately perform the flow control.
- the present invention has been made in view of the above problems, and an object thereof is to provide a gateway apparatus that performs flow control of a frame signal supplied from a circuit switching network to an IMS core network.
- a gateway device includes a communication unit that communicates a radio base station controller connected to a circuit-switched network with a frame signal compliant with an IuUP (Iu User Plane) protocol, and a frame signal received by the communication unit has a predetermined condition. And a conversion unit that converts information included in the frame signal into information to be set in an IMS (IP Multimedia Subsystem) flow control signal when the frame signal satisfies a predetermined condition. And a flow control signal transmitter for transmitting a flow control signal including the converted information to the communication device in the IMS.
- IMS IP Multimedia Subsystem
- a system includes a gateway device and a flow control device that are communicably connected to each other, and the gateway device is compliant with a radio base station control device connected to a circuit switched network and an IuUP (IuIUser Plane) protocol.
- a first communication unit that communicates the frame signal, a determination unit that determines whether or not the frame signal received by the first communication unit satisfies a predetermined condition, and A conversion unit that converts information included in the frame signal into information to be set in an IMS (IP Multimedia Subsystem) flow control signal, and a second communication unit that transmits the information converted by the conversion unit to the flow control device
- the flow control device sends a flow control signal including the information received from the gateway device to the IMS. It has a flow control signal transmitter for transmitting to the communication device.
- the communication method receives a frame signal conforming to the IuUP (Iu User Plane) protocol from a radio base station controller connected to a circuit switched network, and determines whether or not the frame signal satisfies a predetermined condition.
- the information contained in the frame signal is converted into information to be set in the flow control signal of IMS (IP Multimedia Subsystem), and the flow control signal including the converted information is converted into the flow control signal.
- IMS IP Multimedia Subsystem
- flow control suitable for IMS can be performed on a frame signal supplied from a circuit-switched network to IMS. This makes it possible to provide the multimedia service in the circuit switched network to the IMS in an appropriate state.
- Radio base station controller 101 circuit switched network 102
- IMS core network 110 Gateway device 120
- IMS device 200 U-Plane gateway device 210
- Flow controller 111,115,202,204 U-Plane data communication part 112,201 discriminator 113,203 Protocol converter 114,211 Flow control signal transmitter 205,212 MEGACO Communications Department
- FIG. 1 shows the system configuration of the first embodiment of the present invention.
- the radio base station control device 100 and the gateway device 110 are connected via a circuit switching network 101.
- the IMS device 120 is connected to the gateway device 110 via the IMS core network 102 formed in the IP network.
- an IMS-MGW (IMS media gateway) device can be used as the IMS device 120.
- the configuration of the IMS-MGW apparatus is described in, for example, Non-Patent Document 2 by 3GPP, TS23.228, TS29.163, and the like.
- the configuration of the IMS core network 102 is described in Non-Patent Document 1 and TS 23.228 described above.
- the system 10 of this embodiment uses AMR (Adaptive Multi-Rate) as a voice codec for voice telephone service.
- AMR is described in 3GPP Non-Patent Document 3 and TS 26.071.
- other audio codecs such as AMR-WB and AMR-WB + can be used.
- AMR-WB and AMR-WB + are described in TS26.190 and TS26.290 of 3GPP, respectively.
- the gateway device 110 receives a frame signal conforming to a protocol used in the circuit switching network 101 as user plane (User ⁇ Plane) data from the radio base station control device 100.
- a protocol used in the circuit switching network 101 as user plane (User ⁇ Plane) data from the radio base station control device 100.
- this protocol for example, the IuUP (Iu User Plane) protocol can be used.
- the IuUP protocol is described in Non-Patent Document 4 by 3GPP.
- FIG. 2 shows the functional configuration of the gateway device 110.
- the U-Plane (User Plane) data communication unit 111 communicates a frame signal of the IuUP protocol with the radio base station control device 100 (FIG. 1) via the circuit switching network 101.
- the U-Plane data communication unit 115 communicates an IuUP protocol frame signal with the IMS device 120 (FIG. 1) via the IMS core network 102.
- the flow control signal transmission unit 114 generates a flow control signal corresponding to the frame signal received from the radio base station control apparatus 100 and transmits it to the IMS apparatus 120.
- the determining unit 112 determines whether or not the frame signal received from the radio base station control device 100 satisfies a preset condition. When it is determined that the received frame satisfies the predetermined condition, the protocol conversion unit 113 converts information included in the frame into information to be set in the flow control signal generated by the flow control signal transmission unit 114.
- the U-Plane data communication unit 111 receives the IuUP protocol frame signal transmitted from the radio base station controller 100 via the circuit switched network 101 (step S1).
- the discriminating unit 112 extracts PDU type information and ProcedureProIndicator information included in the received frame. Then, it is determined whether or not the PDU type information is “14” of “0”, “1”, and “14”, and whether or not the Procedure ⁇ Indicator information is “0” (step S2). ).
- the protocol converter 113 determines that the received frame is an IuUP protocol initialization request. Recognize (step S4).
- the initialization request is a procedure for securing a necessary band for the signal path from the IMS core network 102 to the radio base station controller 100.
- the protocol conversion unit 113 uses at least one piece of information (1) to (3) described later included in the frame to perform an AMR-compliant mode-set. Information is created (step S5).
- the mode-set information created using the above information is information to be set in the flow control signal generated by the flow control signal transmission unit 114, and means a request regarding the bit rate of AMR received from the counterpart device. That is, the mode-set information is information for instructing the IMS device 120 about an AMR bit rate to be applied to data transmission from the IMS device 120 to the radio base station control device 100.
- the protocol conversion unit 113 creates mode-set information based on a preset conversion table as shown in Table 1 below.
- the protocol conversion unit 113 uses the RFCI information extracted from the received frame, the number of RAB sub-flows for each RFCI, and the length of each RAB sub-flow to change the AMR mode-set information. Assume that it is created.
- the RFCI information is information for identifying a combination of the size (Length) of each RAB sub-flow, and corresponds to the information on the left end column in Table 1 above.
- the RFCI information of the received frame is “9” and the sizes of RAB sub-flow 1, RAB sub-flow 2, RAB sub-flow 3 are "81", “103", and “60", respectively.
- “7” is obtained from the rightmost column of Table 1 as mode-set information corresponding to these pieces of information.
- the protocol conversion unit 113 supplies the mode-set information thus obtained to the flow control signal transmission unit 114.
- the flow control signal transmission unit 114 sets the mode-set information from the protocol conversion unit 113 as a flow control signal to be transmitted to the IMS device 120 (step S6).
- a protocol of the flow control signal for example, RTCP (RTP (Real-time Transport Protocol) Control Protocol) defined by RFC 3551 by IETF (Internet Engineering Task Force) can be used.
- RTP Real-time Transport Protocol
- IETF Internet Engineering Task Force
- the RTCP / APP packet described in Non-Patent Document 5 may be applied to the packet of the flow control signal.
- the RTCP APP packet is a type of RTCP packet that can be defined according to the application. By setting “204” in the packet type (PT) field of the RTP packet, it can be defined that the packet is an RTCP APP packet.
- the flow control signal transmission unit 114 sets the mode-set information from the protocol conversion unit 113 in the data storage field of the packet.
- the RTCP APP packet can be transmitted at any timing.
- the flow control signal transmission unit 114 creates the RTCP APP packet in which the mode-set information is set, the flow control signal transmission unit 114 immediately transmits it to the IMS device 120 (step S7).
- flow control suitable for the IMS core network 102 can be performed on the frame signal supplied from the circuit switching network 101 to the IMS core network 102. Thereby, it is possible to provide the multimedia service in the circuit switching network 101 to the IMS in an appropriate state.
- the IMS device 120 may be a device connected to the IP network itself instead of the IMS core network 102 formed in the IP network. In this case, the IMS core network 102 of FIG. 1 is replaced with a fixed IP network.
- Information set in the flow control signal to the IMS device 120 is not limited to mode-set information, and may be other parameters such as CMR (Codec Mode Request) information.
- CMR Codec Mode Request
- a packet format conforming to RFC3267 or RFC4867 is used, and CMR information is embedded in the packet format.
- the gateway device 110 can receive U-Plane data from the IMS device 120 via the IMS core network 102 and output it to the radio base station control device 100 via the circuit switching network 101.
- the determination unit 112 of the above embodiment determines whether or not the received frame is an initialization request.
- the determination unit 112 is not limited thereto.
- the determination unit 112 may determine whether or not the received frame is a rate control request of the IuUP protocol. .
- the PDU type of the received frame is “14” and the Procedure Indicator information indicates “1”, it is determined that the frame is a Rate Control request.
- the Rate control request is a procedure for requesting control of the AMR bit rate in communication in the direction from the IMS core network 102 to the circuit switched network 101.
- the present invention can be implemented as a computer program corresponding to the operation procedure of the gateway device 110 (FIG. 3) or a recording medium storing the program.
- FIG. 4 shows the system configuration of the second embodiment of the present invention.
- the same reference numerals are given to the same components as those in the above-described embodiment (FIG. 1).
- the flow control process and the U-Plane process in the technical field of the present invention are originally processes having different properties. Therefore, in the present embodiment, a system 20 for performing each process with a separate device is presented.
- the system 20 has a configuration in which the function of the gateway device 110 of the above-described embodiment is distributed to the U-Plane gateway device 200 and the flow control device 210.
- FIG. 5 shows the functional configuration of the U-Plane gateway device 200 and the flow control device 210.
- the determination unit 201, the U-Plane data communication unit 202, the protocol conversion unit 203, and the U-Plane data communication unit 204 are the determination unit 112, U-Plane in the gateway device 110 of FIG. It performs the same functions as the data communication unit 111, the protocol conversion unit 113, and the U-Plane data communication unit 115.
- the U-Plane data communication unit 202 corresponds to the first communication unit of the gateway device in the system according to the present invention.
- the flow control signal transmission unit 211 of the flow control device 210 has the same function as the flow control signal transmission unit 114 (FIG. 2) of the gateway device 110.
- the U-Plane gateway device 200 and the flow control device 210 are communicably connected to each other.
- MEGACO Media Gateway Control
- RFC3015 of IETF is used as a protocol for the connection.
- a MEGACO communication unit 205 is provided in the U-Plane gateway device 200, and a MEGACO communication unit 212 is provided in the flow control device 210.
- the MEGACO communication unit 205 corresponds to the second communication unit of the gateway device in the system according to the present invention.
- the operation of this embodiment is basically the same as that of the above-described embodiment described with reference to FIG. That is, when the U-Plane data communication unit 202 receives a frame of the IuUP protocol from the circuit switched network 101, the determination unit 201 confirms the PDU type and Procedure Indicator information of the frame. As a result of the confirmation, if the PDU type is “14” and the Procedure Indicator information is “0”, the protocol conversion unit 203 creates AMR mode-set information using the RFCI information of the received frame.
- the MEGACO communication unit 205 supplies the created mode-set information to the flow control apparatus 210 on the MEGACO signal together with transmission instruction information and the like.
- the flow control signal transmission unit 211 when the MEGACO communication unit 212 receives the mode-set information from the U-Plane gateway device 200, the flow control signal transmission unit 211 sends the mode-set information to the flow like the RTCP APP packet described above. Set to control signal.
- the flow control signal transmission unit 211 transmits a flow control signal to the IMS core network 102.
- the flow control process and the U-Plane process are performed by separate apparatuses, it is possible to assign an optimal apparatus for each process. This facilitates ensuring system scalability (width from small capacity to large capacity).
- the protocol for connection between the U-Plane gateway device 200 and the flow control device 210 is not limited to MEGACO as long as it is compatible with the flow control signal protocol, and may be SIP, for example.
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Abstract
Description
3rdGeneration Partnership Project、"3GPP TS 23.002 v7.1.0"、pp.36-38; Figure 6、2006年3月発行、[2007年12月27日検索]、インターネット<http://www.3gpp.org/ftp/Specs/html-info/23002.htm> 3rdGeneration Partnership Project、"3GPP TS 29.163 v8.0.0"、pp.88-89; Figure 32、2007年9月発行、[2007年12月27日検索]、インターネット<http://www.3gpp.org/ftp/Specs/html-info/29163.htm> 3rdGeneration Partnership Project、"3GPP TS 26.090 v5.0.0"、pp.13-15; Table 1、2002年6月発行、[2007年12月27日検索]、インターネット<http://www.3gpp.org/ftp/Specs/html-info/26090.htm> 3rdGeneration Partnership Project、"3GPP TS 25.415 v7.3.0"、pp.11-13; Figure 3、2006年12月発行、[2007年12月27日検索]、インターネット<http://www.3gpp.org/ftp/Specs/html-info/25415.htm> IETF Audio-Video Transport Working Group、"Request For Comment (RFC) 1889"、pp.37-38; Section 6.6、2006年1月発行、[2007年12月28日検索]、インターネット<ftp://ftp.rfc-editor.org/in-notes/rfc1889. txt>
100 無線基地局制御装置
101 回線交換ネットワーク
102 IMSコアネットワーク
110 ゲートウェイ装置
120 IMS装置
200 U-Planeゲートウェイ装置
210 フロー制御装置
111,115,202,204 U-Planeデータ通信部
112,201 判別部
113,203 プロトコル変換部
114,211 フロー制御信号送信部
205,212 MEGACO通信部
図1に、本発明の第1の実施形態のシステム構成を示す。本実施形態のシステム10において、無線基地局制御装置100及びゲートウェイ装置110は、回線交換ネットワーク101を介して接続される。また、IMS装置120は、IP網に形成されたIMSコアネットワーク102を介してゲートウェイ装置110に接続される。
(2)1番目のRFCIにおける N個のRAB sub-flowの各々の長さ (Length)
(3)2番目のRFCIにおけるN個のRAB sub-flowの各々の長さ(Length)
図4に、本発明の第2の実施形態のシステム構成を示す。図示のシステム20において、前述の実施形態(図1)と同様な構成要素には、同一の符号が付されている。
Claims (11)
- 回線交換ネットワークに接続された無線基地局制御装置とIuUP(Iu User Plane)プロトコル準拠のフレーム信号を交信する通信部と、
前記通信部により受信したフレーム信号が所定条件を満たすか否かを判別する判別部と、
前記フレーム信号が所定条件を満たす場合に該フレーム信号に含まれる情報をIMS(IP Multimedia Subsystem)のフロー制御信号に設定すべき情報へ変換する変換部と、
前記変換された情報を含むフロー制御信号を前記IMSにおける通信装置へ送信するフロー制御信号送信部とを備えることを特徴とするゲートウェイ装置。 - 前記フロー制御信号送信部は、前記フロー制御信号として、RTCP(RTP Control Protocol)準拠の信号を送信することを特徴とする請求項1記載のゲートウェイ装置。
- 前記判別部は、判別対象のフレーム信号がIuUPプロトコルのInitialization要求またはRateControl要求を表す場合に、当該フレーム信号が所定条件を満たすと判別することを特徴とする請求項1又は2記載のゲートウェイ装置。
- 前記変換部は、前記所定条件を満たすフレーム信号に含まれるRFCI(RAB Sub-Flow Combination Indicator)、RABSub-Flowの個数、および、RAB Sub-Flowの長さのうちの少なくとも1つを用いて、前記フロー制御信号に設定すべき情報としての音声コーデックのビットレートを決定することを特徴とする請求項1乃至3のいずれか1項に記載のゲートウェイ装置。
- 相互に通信可能に接続されたゲートウェイ装置およびフロー制御装置を備え、
前記ゲートウェイ装置は、回線交換ネットワークに接続された無線基地局制御装置とIuUP(Iu User Plane)プロトコル準拠のフレーム信号を交信する第1の通信部と、前記第1の通信部により受信したフレーム信号が所定条件を満たすか否かを判別する判別部と、前記フレーム信号が所定条件を満たす場合に該フレーム信号に含まれる情報をIMS(IP Multimedia Subsystem)のフロー制御信号に設定すべき情報へ変換する変換部と、前記変換部により変換された情報を前記フロー制御装置へ送信する第2の通信部とを有し、
前記フロー制御装置は、前記ゲートウェイ装置から受信した前記情報を含むフロー制御信号を前記IMSにおける通信装置へ送信するフロー制御信号送信部を有することを特徴とするシステム。 - 前記第2の通信部は、前記フロー制御装置へ送信すべき情報をMEGACO(Media Gateway Control)プロトコルに基づき送信することを特徴とする請求項5記載のシステム。
- 回線交換ネットワークに接続された無線基地局制御装置からIuUP(Iu User Plane)プロトコル準拠のフレーム信号を受信し、
前記フレーム信号が所定条件を満たすか否かを判別し、
前記フレーム信号が所定条件を満たす場合、当該フレーム信号に含まれる情報をIMS(IP Multimedia Subsystem)のフロー制御信号に設定すべき情報へ変換し、
前記変換された情報を含むフロー制御信号を前記IMSにおける通信装置へ送信することを特徴とする通信方法。 - 前記フロー制御信号として、RTCP(RTP Control Protocol)準拠の信号を送信することを特徴とする請求項7記載の通信方法。
- 前記判別において、対象のフレーム信号がIuUPプロトコルのInitialization要求またはRateControl要求を表す場合に、当該フレーム信号が所定条件を満たすと判別することを特徴とする請求項7又は8記載の通信方法。
- 前記変換において、前記所定条件を満たすフレーム信号に含まれるRFCI(RAB Sub-Flow Combination Indicator)、RABSub-Flowの個数、および、RAB Sub-Flowの長さのうちの少なくとも1つを用いて、前記フロー制御信号に設定すべき情報としての音声コーデックのビットレートを決定することを特徴とする請求項7乃至9のいずれか1項に記載の通信方法。
- コンピュータに、
回線交換ネットワークに接続された無線基地局制御装置からIuUP(Iu User Plane)プロトコル準拠のフレーム信号を受信するステップと、
前記フレーム信号が所定条件を満たすか否かを判別するステップと、
前記フレーム信号が所定条件を満たす場合、当該フレーム信号に含まれる情報をIMS(IP Multimedia Subsystem)のフロー制御信号に設定すべき情報へ変換するステップと、
前記変換された情報を含むフロー制御信号を前記IMSにおける通信装置へ送信するステップとを実行させることを特徴とするプログラム。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09701541.6A EP2234352B1 (en) | 2008-01-16 | 2009-01-15 | Gateway device, system, and communication method |
| US12/810,171 US9781166B2 (en) | 2008-01-16 | 2009-01-15 | Gateway device, system, and communication method |
| CN2009801019110A CN101919216A (zh) | 2008-01-16 | 2009-01-15 | 网关装置、系统和通信方法 |
| JP2009550032A JP5093526B2 (ja) | 2008-01-16 | 2009-01-15 | ゲートウェイ装置およびシステム、並びに、通信方法 |
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| JP2008006889 | 2008-01-16 | ||
| JP2008-006889 | 2008-01-16 |
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| WO2009090983A1 true WO2009090983A1 (ja) | 2009-07-23 |
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| US (1) | US9781166B2 (ja) |
| EP (1) | EP2234352B1 (ja) |
| JP (1) | JP5093526B2 (ja) |
| CN (1) | CN101919216A (ja) |
| WO (1) | WO2009090983A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102598642A (zh) * | 2009-11-04 | 2012-07-18 | 日本电气株式会社 | 网关装置、便携终端、便携通信方法以及程序 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5758354B2 (ja) * | 2012-07-04 | 2015-08-05 | 株式会社Nttドコモ | 無線通信システム |
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| JP2002185554A (ja) * | 2000-12-13 | 2002-06-28 | Nec Corp | 通信方式およびトランスコーダのアライメント方法 |
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| JPS58215151A (ja) | 1982-06-07 | 1983-12-14 | Nippon Telegr & Teleph Corp <Ntt> | 網間接続方式 |
| JP2002354144A (ja) | 2001-05-24 | 2002-12-06 | Victor Co Of Japan Ltd | ゲートウェイ及びルータ |
| US7142532B2 (en) | 2001-07-23 | 2006-11-28 | Acme Packet, Inc. | System and method for improving communication between a switched network and a packet network |
| US6996087B2 (en) | 2001-07-31 | 2006-02-07 | Lucent Technologies Inc. | Communication system including an interworking mobile switching center for call termination |
| KR20050004814A (ko) * | 2002-06-07 | 2005-01-12 | 지멘스 악티엔게젤샤프트 | 무선 네트워크 제어기(rnc)와 추가의 이동 무선네트워크 소자 사이에 ip 패킷들을 전송하는 방법 및디바이스 |
| SE0301053D0 (sv) * | 2003-04-07 | 2003-04-07 | Ericsson Telefon Ab L M | Method and system in a communications network |
| GB0314252D0 (en) | 2003-06-19 | 2003-07-23 | Ericsson Telefon Ab L M | Conversational bearer negotiation |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2234352A4 (en) | 2014-01-01 |
| JP5093526B2 (ja) | 2012-12-12 |
| US9781166B2 (en) | 2017-10-03 |
| JPWO2009090983A1 (ja) | 2011-05-26 |
| EP2234352A1 (en) | 2010-09-29 |
| EP2234352B1 (en) | 2019-09-11 |
| CN101919216A (zh) | 2010-12-15 |
| US20100272023A1 (en) | 2010-10-28 |
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