WO2007086124A1 - SYSTÈME DE CONTRÔLE DE QoS - Google Patents

SYSTÈME DE CONTRÔLE DE QoS Download PDF

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Publication number
WO2007086124A1
WO2007086124A1 PCT/JP2006/301236 JP2006301236W WO2007086124A1 WO 2007086124 A1 WO2007086124 A1 WO 2007086124A1 JP 2006301236 W JP2006301236 W JP 2006301236W WO 2007086124 A1 WO2007086124 A1 WO 2007086124A1
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WO
WIPO (PCT)
Prior art keywords
qos
layer
control system
controller
communication service
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PCT/JP2006/301236
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English (en)
Japanese (ja)
Inventor
Masahiko Nanri
Original Assignee
Matsushita Electric Industrial Co., Ltd.
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 Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to PCT/JP2006/301236 priority Critical patent/WO2007086124A1/fr
Publication of WO2007086124A1 publication Critical patent/WO2007086124A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2475—Traffic characterised by specific attributes, e.g. priority or QoS for supporting traffic characterised by the type of applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
    • H04L67/61—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources taking into account QoS or priority requirements
    • 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
    • H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
    • 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
    • H04L69/24—Negotiation of communication capabilities
    • 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
    • H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection

Definitions

  • the present invention relates to a QoS (Quality of Service) control system that guarantees the quality of communication services, and in particular, to guarantee the quality of communication services including all layers from the physical layer to the application layer. It is related to the QoS control system.
  • QoS Quality of Service
  • QoS control technology has been widely used to guarantee the quality of communication services.
  • speeding up the data rate is an important factor.
  • Quality assurance technology for the various communication services provided that is, QoS control technology is an even more important factor.
  • a QoS control technique for example, a technique for assuring the quality of various communication services by appropriately performing retransmission control of a wireless line is disclosed (for example, refer to Patent Document 1).
  • real-time communication is performed by retransmitting the information of ATM (Asynchronous Transfer Mode) cells contained in abnormal wireless packets, excluding those with low priority for discarding, with wireless packets. Guarantee quality.
  • ATM Asynchronous Transfer Mode
  • Patent Document 1 Japanese Patent Laid-Open No. 9-214507
  • the scope of conventional QoS control is mainly limited to the transport layer power and the data link layer.
  • the lower physical layer and the upper application layer are not subject to QoS control. It has become.
  • 16QAM Higher level MCS (Modulation and Coding Scheme) such as 16 Quadrature Amplitude Modulation is selected.
  • fading valley that is, in an environment where the channel quality is momentarily poor, retransmission of the voice packet occurs, which causes delay and jitter.
  • QoS information varies depending on the type of service provided. For example, although in the case of a voice call required transmission rate is sufficient about several tens of kbps, also the required packet error one rate (PER) is also relatively mild conditions of about 10 2, against the delay and jitter The requirements are very strict. In other words, communication in voice calls must be guaranteed (Guarantee Type) communication that guarantees a certain delay and jitter! /,. In the case of data transmission such as FTP (File Transfer Protocol), the transmission rate is the best effort type, and the requirements for delay and jitter are moderate, but the packet error rate is low. However, error-free and strict conditions are required. These QoS conditions also have an impact on wired lines, but the impact on wireless lines is very large.
  • FTP File Transfer Protocol
  • An object of the present invention is to provide a QoS control system that can provide a communication service with high quality by performing QoS control including the physical layer power including multiple layers up to the application layer. is there.
  • the QoS control system of the present invention is a QoS control system that guarantees the quality of a communication service including all layers of the OSI layer, and includes a transmission device that provides the communication service and a reception that enjoys the communication service. Installed in at least one of the devices and the intermediate device that connects the transmitter and receiver, equipped with a QoS controller that realizes the quality assurance of the communication service. Accordingly, it adopts a configuration that defines user QoS for providing the communication service corresponding to the user.
  • a QoS controller for performing QoS control is installed in at least one of the reception device, the transmission device, and the intermediate node that constitutes the communication system, and the communication system is classified according to the type of communication service.
  • User QoS is defined in the QoS controller. This As a result, the QoS controller sets the required transmission rate, allowable delay, allowable packet error rate, allowable jitter, etc., which are the quality assurance conditions for the communication service to be provided, depending on the user QoS and hardware performance, type, and form. be able to.
  • the protocol stack and parameters required for providing the communication service can be changed for each OSI layer. Is defined. Therefore, the transmission device, reception device, and intermediate node equipped with the QoS controller can perform QoS control for each layer, so that the operation status of each layer can be periodically reported to the QoS controller. it can.
  • the QoS controller detects a deterioration in the quality of the communication service due to a bad state of a certain layer
  • the QoS controller updates the parameters of the corresponding layer or other layers as appropriate to improve the quality of the communication service. Recovery can be achieved. That is, according to the QoS control system of the present invention, a QoS controller for performing quality assurance of communication services is installed in each hardware, and user QoS for performing communication services for each layer is defined. The communication quality can be guaranteed by including all layers.
  • FIG. 1 is a network configuration diagram for realizing the QoS control system of the present invention.
  • FIG. 2 A diagram showing the layer structure of each element in the network shown in FIG.
  • FIG. 3 is a diagram showing the relationship between the QoS controller applied to the present invention and each layer.
  • FIG. 4 Diagram showing monitoring items and control items for each layer performed by the QoS controller shown in FIG. 3.
  • FIG. 5 Diagram showing QoS control items for each layer performed by the QoS controller shown in FIG.
  • FIG.7 Diagram showing the relationship between the user QoS executed by the QoS controller shown in Fig. 6 and the contents of the communication service
  • FIG. 8 is a conceptual diagram showing how VoIP is initially set for a mobile phone (user B) in the QoS control system according to the second embodiment of the present invention.
  • FIG. 9 is a diagram showing control items for each layer performed in the QoS control system according to the second embodiment of the present invention.
  • FIG. 10 Each layer force performed in the QoS control system of the second embodiment of the present invention A diagram showing the state of VoIP status reporting
  • FIG. 11 is a diagram showing a flow of physical layer QoS control performed in the QoS control system according to the second embodiment of the present invention.
  • FIG. 12 is a diagram showing a flow of QoS control in the data link layer performed in the QoS control system according to the second embodiment of the present invention.
  • FIG. 13 is a diagram showing a flow of QoS control in the presentation layer (application layer) performed in the QoS control system according to the second embodiment of the present invention.
  • the QoS control system of the present invention provides communication quality assurance to all or any one of a transmission device that provides communication services, a reception device that enjoys communication services, and intermediate nodes such as routers and access points. Install a QoS controller to do this.
  • a QoS controller For each QoS controller, user QoS is defined for each service type for providing communication services to users.
  • the QoS controller determines various conditions (for example, required transmission rate, permissible delay, permissible packet error rate, permissible jitter, etc.) that guarantee the quality of the communication service according to the performance, type, and form of user QoS and nodeware. Etc.) can be defined.
  • the QoS controller has a physical layer power in each of the hardware (that is, a transmission device, a reception device, and an intermediate node) for the OSI (Open System Interconnection: International Standardization Organization) layer up to the application layer.
  • OSI Open System Interconnection: International Standardization Organization
  • the QoS controller can perform QoS control individually for each layer. Therefore, each layer can periodically report its own status to the QoS controller. Therefore, when the quality of the communication service deteriorates due to the state of a certain layer being degraded, the QoS controller Alternatively, the quality of communication services can be restored by adaptively updating the parameters of other layers.
  • the parameters of the presentation layer can be updated to restore the quality of the communication service.
  • FIG. 1 is a configuration diagram of a network for realizing the QoS control system of the present invention.
  • a mobile node (MN) 1 such as a mobile phone and a correspondent node (CN) 2 such as a fixed phone communicate with each other via the Internet 3
  • MN1 is connected to an access point (AP) 4 through a wireless line
  • AP4 is connected to the Internet network 3 through a router 5.
  • CN 2 is also connected to the Internet network 3 through a router 6.
  • the network configuration is not limited to a wireless transmission line, and can be applied to, for example, power line conveyance by a power line transmission line.
  • FIG. 2 is a diagram showing a layer configuration of each element in the network shown in FIG.
  • FIG. 2 shows the layer configuration of MN1, CN2, AP4, and routers 5 and 6 shown in FIG. Figure 2 [As shown here, MN1, CN2, AP4, and Norator 5, 6 ⁇ , all based on the OSI reference model (i.e., application layer, transport layer, network layer, Data link layer and physical layer). However, since ⁇ 4 and routers 5 and 6 only serve as relay nodes, they actually have functions below the network layer.
  • OSI reference model i.e., application layer, transport layer, network layer, Data link layer and physical layer.
  • ⁇ 4 and routers 5 and 6 only serve as relay nodes, they actually have functions below the network layer.
  • FIG. 3 is a diagram showing the relationship between the QoS controller applied to the present invention and each layer.
  • the QoS controller 7 is connected to the application layer, transport layer, network layer, data link layer, and physical layer, and the status in each layer is regularly monitored. QoS controller 7 is notified.
  • the QoS controller 7 integrates the information provided by each layer, and the required QoS (that is, required rate, allowable delay) defined by this information and the communication service provided to the user (hereinafter referred to as user QoS). , Allowable packet error rate, and allowable jitter). If the conditions of user QoS are met and there are any items, appropriate instructions are given to each layer to establish a communication service. Adaptively guarantee the quality of the screw.
  • FIG. 4 is a diagram showing monitoring items and control items of each layer performed by the QoS controller 7 shown in FIG.
  • the application layer monitors and controls delay and jitter
  • the transport layer monitors and controls TCP (Transmission Control Protocol) retransmission, packet arrival interval, packet loss rate, delay, and jitter.
  • TCP Transmission Control Protocol
  • the network layer monitors and controls the queue state (Queue state) of the data structure in which the previously input data is output first.
  • the data link layer monitors and controls the number of data retransmissions.
  • the physical layer monitors and controls SIR (Signal to Interference Ratio), Delay Spread, Doppler Frequency (fd), and BER (Bit Error Rate) / PER (Packet Error Rate).
  • FIG. 5 is a diagram showing QoS control items for each layer performed by the QoS controller 7 shown in FIG. That is, in this figure, the contents of “required rate”, “delay”, “packet error”, and “jitter” are shown for each layer of each layer.
  • the “required rate” is the QoS control of the audio Z video codec rate in the application layer, the TCP window size QoS control in the transport layer, and the queue priority (Queuing) in the network layer. Priority) and bandwidth allocation QoS control.
  • the data link layer performs scheduler QoS control, and the physical layer performs MCS and SF QoS control. For “delay”, “packet error”, and “jitter”, QoS control as shown in the corresponding items in Fig. 5 is performed for each layer.
  • FIG. 6 is a configuration diagram of a QoS controller applied to the present invention.
  • QoS controller 7 consists of application layer interface 11, transport layer interface 12, network layer interface 13, data link layer interface 14, physical layer interface 15, protocol determinator 16, QoS calculator 17
  • the information determining unit 18, the control circuit 19, the communication quality holding circuit 20, and the hardware information holding circuit 21 are provided.
  • Each layer interface 11, 12, 13, 14, and 15 exchanges information with the control circuit 19 regarding the monitoring items and control items for each layer as shown in FIG. Has a function.
  • the application layer interface 11 uses user QoS information as a protocol. It also has a function of delivering to the determiner 16 and the QoS calculator 17.
  • the protocol determiner 16 has a function of determining a protocol and parameters necessary for service provision. Based on the user QoS information, the QoS calculator 17 calculates the required transmission rate R, allowable delay T, allowable
  • the information determiner 18 calculates the calculation result of the QoS calculator 17 (that is, the required transmission rate R, the allowable delay,
  • the communication quality maintaining circuit 20 includes transmission lines reported from the interfaces of each layer (that is, the application layer interface 11, the transport layer interface 12, the network layer interface 13, the data link layer interface 14, and the physical layer interface 15). It has a function to hold quality information.
  • the hardware information holding circuit 21 has a function of holding information such as a hardware buffer amount in the QoS controller 7.
  • the control circuit 19 has a function of controlling each component of the QoS controller 7 based on user QoS information and performing QoS control.
  • the user QoS information output from the application layer interface 11 is input to the protocol determiner 16 and the QoS calculator 17.
  • the protocol determiner 16 determines initial protocols and initial parameters necessary for service provision, and the interface of each layer (that is, the application layer interface 11, the transport layer interface 12, the network layer interface) through the control circuit 19. 13, The data link layer interface 14 and the physical layer interface 15) are notified of the protocols and parameters required to provide communication services.
  • the required transmission rate R, the allowable delay T, the allowable packet, etc. depending on the QoS of the QoS calculator 17 user QoS and the hardware performance (for example, the amount of notch) previously stored in the QoS calculator 17 in advance.
  • required QoS such as error rate P and allowable jitter T h dl err j
  • the error rate P and the allowable jitter T) are input to the information determiner 18, respectively.
  • the communication quality maintaining circuit 20 includes interfaces of each layer (that is, an application layer interface 11, a transport layer interface 12, a network layer interface). 1), data link layer interface 14, and physical layer interface 15) report transmission path quality information (for example, SIR, delay spread, Doppler frequency, etc.). Holds information such as hardware noise amount in controller 7. Information held in the communication quality holding circuit 20 and the nodeware information holding circuit 21 is used in the protocol determiner 16 as necessary.
  • FIG. 7 is a diagram showing the relationship between the user QoS executed by the QoS controller 7 shown in FIG. 6 and the contents of the communication service.
  • user QoS is classified into five types, and the contents of various communication services are determined for each item. That is, the service type of the user QoS “l” is a voice call, and a specific service example is VoIP (Voice over Internet Protocol).
  • the service type of user QoS “2” is interactive streaming, and a specific service example is a videophone.
  • the service type of user QoS “3” is unidirectional streaming, and a specific service example is Internet TV.
  • the service type of user QoS “4” is data communication, and a specific service example is file transfer.
  • the service type of the user QoS “5” is real-time data communication, and a specific service example is a communication battle game.
  • the second embodiment described below is based on the following four items.
  • the network configuration is as shown in Figure 1 above.
  • a QoS controller Assume that only mobile phones have a QoS controller, and fixed phones and intermediate nodes (for example, access point HAP) and routers do not have a QoS controller.
  • Q Only the physical layer, data link layer, and presentation layer are subject to oS control.
  • FIG. 8 is a conceptual diagram showing how VoIP is initially set for a mobile phone (user B) in the QoS control system according to the second embodiment of the present invention.
  • the configuration of the QoS control system in the second embodiment shown in FIG. 8 is the same as the configuration in FIG. 3 and FIG. 6 described above, and therefore the same reference numerals are given.
  • the application layer interface 11 in FIG. 6 is read as being synonymous with the application layer 11 in FIG.
  • the application layer 11 notifies the QoS controller 7 of “user QoS designation” that the VoIP service is started. Then, the QoS controller 7 determines the required QoS (that is, the required transmission rate R, the allowable delay T, the allowable packet error rate P, based on the contents of the communication service included in the notified “user QoS specification”.
  • the QoS controller 7 includes the required transmission rate R ⁇ 83 kbps, the allowable delay T ⁇ 300 msec, and the allowable packet error rate.
  • the protocol determiner 16 determines the protocol and parameters necessary for providing the service, and passes through the control circuit 19 to each layer (that is, the application layer 11, the transport). “Protocol designation” and “parameter designation” are instructed to the layer 12, the network layer 13, the data link layer 14, and the physical layer 15).
  • the audio codec of the presentation layer that is, application layer 11
  • SIP Session Initiation Protocol
  • RTP Real-time Transport Protocol
  • RTCP RTP Control Protocol
  • UDP User Datagram Protocol
  • IPv6 IP version 6
  • the parameters in the data link layer 14 are For both uplink and downlink, the maximum number of retransmissions of HARQ (High Availability Resolution Queue) is set to a low number (for example, 2 times) and the number of channels used is "1".
  • CDMA code division multiple access
  • FIG. 9 is a diagram showing control items for each layer performed in the QoS control system according to the second embodiment of the present invention.
  • the voice codec is controlled by G.711 or G.729 parameters.
  • the maximum number of radio frame retransmissions is controlled with a parameter 1 to L0, and the number of channels is controlled with parameters 1 to 3.
  • FIG. 10 is a diagram showing a state of VoIP status reporting from each layer performed in the QoS control system according to the second embodiment of the present invention.
  • the session layer that is, the application layer 11
  • it is reported to the QoS controller 7 as the average delay time and jitter information delay of the downlink voice packet observed by RTCP.
  • the network layer 13 reports a “Queuing Buffer status report” of the voice packet to the QoS controller 7.
  • the data link layer 14 reports the average throughput of the wireless channel and the average number of retransmissions based on HARQ to the QoS controller 7 as “retransmission number 'throughput report”. Further, the state of the radio transmission path (that is, PER, CQK Channel Quality Indicator) is reported from the physical layer 15 to the QoS controller 7 as “PER, CQI report”.
  • CQI refers to a parameter that indicates the line status in a radio link, such as SIR, delay spread, or Doppler frequency.
  • FIG. 11 is a diagram showing the flow of physical layer QoS control performed in the QoS control system of the second embodiment of the present invention.
  • FIG. 12 is a diagram showing a flow of QoS control in the data link layer performed in the QoS control system according to the second embodiment of the present invention.
  • FIG. 13 is a diagram showing a QoS control flow of the presentation layer (application layer) performed in the QoS control system of the second embodiment of the present invention.
  • the flow of QoS control in each layer will be described below with reference to the drawings of FIGS. 11, 12, and 13 with reference to the drawings of the QoS controller of FIG.
  • AP access point
  • the protocol determinator (parameter determinator) 16 determines the SF based on the CQI information.
  • the “SF change request” is transmitted from the QoS controller 7 to the physical layer 15.
  • the physical layer 15 establishes communication with the new SF by negotiation with the access point (AP). If it is determined that the SF cannot be changed, the QoS control of the physical layer 15 is stopped and the QoS control of the data link layer 14 is attempted.
  • the information determiner 18 in the S controller 7 notifies the protocol determiner 16 of a parameter change request.
  • the protocol judgment unit 16 confirms the usage state of the radio resource held in the communication quality holding circuit 20.
  • the QoS controller 7 sends a scheduling change to the data link layer 14 via the control circuit 19 so that a surplus channel is newly allocated in addition to the channel currently in use. "Request" is issued. This improves the throughput for the additional channels.
  • the data link layer 14 that has received the instruction to change the channel assignment newly establishes communication by channel assignment by negotiation with the access point (AP).
  • the QoS controller 7 tries the upper layer QoS control.
  • the network layer 13 and transport layer 12 protocols do not have QoS control means to reduce the transmission rate, so we try QoS control in the presentation layer (ie, application layer 11).
  • the information determination unit 18 in the QoS controller 7 notifies the protocol determination unit 16 of a parameter change request. Then, the control circuit 19 of the QoS controller 7 transmits an instruction of “voice codec change request” to the effect that the low-bit-rate voice codec is used to the application layer 11. At the same time, QoS controller 7 changes the definition of the required transmission rate R
  • a request to use G. 729 (codec rate 8 kbps, required transmission rate 27 kbps) is sent to the application layer 11.
  • the application layer 11 that has received the instruction to change the voice codec notifies the session to that effect.
  • Sessions in the application layer 11 use the SIP reinvite (Invite) function to negotiate media with the partner node and establish communication using the new voice codec.
  • the transmission rate of the wireless line remains at 40 kbps previously notified to the QoS controller 7 by the data link layer 14, but a stable voice call service can be provided by changing the voice codec itself.
  • the fixed phone (User A) does not implement a low-rate codec of 40kbps or less such as G.729
  • the fixed phone (User A) and the mobile phone Media negotiation can be achieved with the lowest rate audio codec that both (User B) can implement.
  • the codec rate is already lower than the lowest codec and the codec rate cannot be lowered, the QoS controller 7 does nothing.
  • the QoS control system of the present invention connects a transmission device that provides a communication service, a reception device that enjoys the communication service, and a connection between the transmission device and the reception device.
  • QoS controllers are installed for all or some of the intermediate node devices, and user QoS corresponding to the type of communication service to be provided is defined in each QoS controller.
  • the QoS controller enables required QoS (for example, required transmission rate, allowable delay, allowable packet error rate, and allowable jitter, which are the quality assurance conditions of the communication service to be provided, depending on the performance, type, and form of user QoS and nodeware. Etc.) can be defined.
  • the QoS controller can define protocol stacks and parameters necessary for providing communication services according to the performance, type, and form of user QoS and nodeware. Therefore, a transmission device, a reception device, and an intermediate node equipped with a QoS controller can define a protocol stack corresponding to the OSI 7 layer model and perform QoS control for each layer. As a result, the transmission device, the reception device, and the intermediate node can periodically report the operation state of each layer to the QoS controller.
  • the QoS controller detects a deterioration in the quality of a communication service due to a state of a certain layer, the QoS controller restores the parameter of the corresponding layer or another layer appropriately to restore the quality of the communication service. Can be achieved. For example, if the line condition deteriorates due to fading in the physical layer, the parameters of the application layer can be updated to restore the quality of the communication service. Note that the QoS controller is When updating a parameter, the parameter power of the physical layer is also prioritized, and if it is difficult to update the parameter of that layer, the parameter update of the higher layer is attempted.
  • the QoS control system has a QoS controller that performs quality assurance of communication services in each hardware, and user QoS that provides communication services is assigned to each layer. Because it is set, it is possible to guarantee the quality of communication services by including all layers. Therefore, it can be effectively used in the communication field with a high communication quality level.

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Abstract

Système de contrôle de QoS assurant une haute qualité des services de communication. Dans ce système de contrôle de QoS, des informations de QoS d'utilisateur d’une interface de la couche Application (11) sont fournies à un décideur de protocole (16) et à un calculateur de QoS (17). Le décideur de protocole (16) décide des protocoles et paramètres nécessaires à la fourniture des services et notifie ces protocoles et paramètres à l’interface de la couche Application (11) et aux interfaces d’autres couches au travers d’un circuit de contrôle (19). De cette manière, un contrôleur de QoS (7) peut contrôler la QoS des couches respectives. Les couches rapportent périodiquement leur état respectif au contrôleur de QoS (7). Lorsque l’état d’une couche se dégrade ainsi que l’état de la qualité du service de communication, le contrôleur de QoS (7) met à jour de façon adaptative les paramètres de cette couche ou d’autres couches de façon à retrouver la qualité du service de communication.
PCT/JP2006/301236 2006-01-26 2006-01-26 SYSTÈME DE CONTRÔLE DE QoS WO2007086124A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2466808A1 (fr) * 2009-08-12 2012-06-20 Mitsubishi Electric Corporation Dispositif de transfert de données, procédé de transfert de données, et système de transfert de données

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