CA2272517C - Qos management apparatus - Google Patents
Qos management apparatus Download PDFInfo
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- CA2272517C CA2272517C CA002272517A CA2272517A CA2272517C CA 2272517 C CA2272517 C CA 2272517C CA 002272517 A CA002272517 A CA 002272517A CA 2272517 A CA2272517 A CA 2272517A CA 2272517 C CA2272517 C CA 2272517C
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
- H04L41/5003—Managing SLA; Interaction between SLA and QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
- H04L41/5003—Managing SLA; Interaction between SLA and QoS
- H04L41/5009—Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2227—Quality of service monitoring
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S370/00—Multiplex communications
- Y10S370/901—Wide area network
- Y10S370/902—Packet switching
- Y10S370/903—Osi compliant network
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S370/00—Multiplex communications
- Y10S370/901—Wide area network
- Y10S370/902—Packet switching
- Y10S370/903—Osi compliant network
- Y10S370/905—Asynchronous transfer mode, ASN
Abstract
A QoS management apparatus in which the quality of the requested QoS for each path and different values of the state are managed. A QoS monitor, a registered QoS, and an operation determining function are provided for each path, and the QoS is precisely managed.
Description
QoS MANAGEMENT APPARATUS
BACKGROUND OF THE INVENTION
Field of the Invention The present invention relates to a QoS management apparatus for managing the QoS (quality of service) or the CoS (class of service) for communication. In this specification, the QoS generally refers to the QoS and the CoS.
Description of the Prior Art FIG. 11 is a block diagram of a conventional communication network relating to the QoS management.
As shown in FIG. 11, the service provided through an access network and a trunk network has been limited to telephone.
Therefore, the value of a requested QoS is constant for every path.
FIG. 12 is a block diagram of the configuration of the conventional QoS management apparatus. A QoS monitor is inserted into each of the paths l, 2, 3, and 4. In an example shown in FIG. 12, a QoS is denoted by a BER (Bit Error Rate) , and a BER monitor is inserted into each of the paths 1, 2, 3, and 4, and monitors the current BER of the corresponding path.
BACKGROUND OF THE INVENTION
Field of the Invention The present invention relates to a QoS management apparatus for managing the QoS (quality of service) or the CoS (class of service) for communication. In this specification, the QoS generally refers to the QoS and the CoS.
Description of the Prior Art FIG. 11 is a block diagram of a conventional communication network relating to the QoS management.
As shown in FIG. 11, the service provided through an access network and a trunk network has been limited to telephone.
Therefore, the value of a requested QoS is constant for every path.
FIG. 12 is a block diagram of the configuration of the conventional QoS management apparatus. A QoS monitor is inserted into each of the paths l, 2, 3, and 4. In an example shown in FIG. 12, a QoS is denoted by a BER (Bit Error Rate) , and a BER monitor is inserted into each of the paths 1, 2, 3, and 4, and monitors the current BER of the corresponding path.
Since the value of the BER to be attained by each path is constant through a r~etwark, a BER is registered for each network.
The function of determining an operation is provided for each path, compares the value of the BER
monitored by the BER monitor of the path with a value of a registered BER far each netwark, and performs a predetermined operation based on the comparison result.
Japanese Patent Application Publication No.
A-06-188880 provides a system comprising a transmission server and a reception server connected to each other through a path containing ars exchange unit. The transmission server and the reception server measure the state of their own system relating to the quality of the communications, and determine the band of the path depending on the measured state of their awn system, thereby appropriately setting the band between the servers without a network manager. Thus, a prompt acta.on can be taken against a sudden state change such as the concentration of hells on a certain server or a network. As a x-esult:, a system can be provided with high efficiency in communications.
The communication control apparatus disclosed by Japanese Patent Application publication No. A-06-276254 (hereinafter referred to as the document) comprises a network control unit: for control:Ling the communication depending on the type of network, a transport layer control unit for controlling the r,~amx~unicati.on between end aystems, and a higher order layer control unit for controlling the communication of higher order units than the transport layers, wherein a different ~aS value is requested j'or each network, and the transport layer control unit has the function of selecting a QoS table far managing the service 7$046-1 quality for each network and a network corresponding to the service quality requested by a higher order layer by referring to the QoS table.
According to Japanese Patent Application Publication No. A-09-231143, a QoS control object operating in each node monitors the resources ;requa.red by the communication session existing in each node. When, for example, a QoS control message too request an increase of the resources assigned to a predetermined session is issued to each node on network from a gate-way xxode, the resources assigned to other. communication sessions are assigned to the current communication session based oxz the priority of the communication session existing in eac:~~. node, and the utilization state of the resources. Thus, for example, when a predetermined session temporarily transfers a large volume of data, a large volume of resources are temporarily assigned to the session, thereby effectively utilizing the resources.
However, by using the DSL (Digital Subscriber Line) technology such as an ADSL (Asynchronous Digital Subscriber Line), etc. as shown in ~'1G. 1:3, the network conventionally used only for telephone services is being used in proving various services requested by end users.
The function of determining an operation is provided for each path, compares the value of the BER
monitored by the BER monitor of the path with a value of a registered BER far each netwark, and performs a predetermined operation based on the comparison result.
Japanese Patent Application Publication No.
A-06-188880 provides a system comprising a transmission server and a reception server connected to each other through a path containing ars exchange unit. The transmission server and the reception server measure the state of their own system relating to the quality of the communications, and determine the band of the path depending on the measured state of their awn system, thereby appropriately setting the band between the servers without a network manager. Thus, a prompt acta.on can be taken against a sudden state change such as the concentration of hells on a certain server or a network. As a x-esult:, a system can be provided with high efficiency in communications.
The communication control apparatus disclosed by Japanese Patent Application publication No. A-06-276254 (hereinafter referred to as the document) comprises a network control unit: for control:Ling the communication depending on the type of network, a transport layer control unit for controlling the r,~amx~unicati.on between end aystems, and a higher order layer control unit for controlling the communication of higher order units than the transport layers, wherein a different ~aS value is requested j'or each network, and the transport layer control unit has the function of selecting a QoS table far managing the service 7$046-1 quality for each network and a network corresponding to the service quality requested by a higher order layer by referring to the QoS table.
According to Japanese Patent Application Publication No. A-09-231143, a QoS control object operating in each node monitors the resources ;requa.red by the communication session existing in each node. When, for example, a QoS control message too request an increase of the resources assigned to a predetermined session is issued to each node on network from a gate-way xxode, the resources assigned to other. communication sessions are assigned to the current communication session based oxz the priority of the communication session existing in eac:~~. node, and the utilization state of the resources. Thus, for example, when a predetermined session temporarily transfers a large volume of data, a large volume of resources are temporarily assigned to the session, thereby effectively utilizing the resources.
However, by using the DSL (Digital Subscriber Line) technology such as an ADSL (Asynchronous Digital Subscriber Line), etc. as shown in ~'1G. 1:3, the network conventionally used only for telephone services is being used in proving various services requested by end users.
In the example shown in FIG. 13, (a) is a plan for transmitting an image (animation) , (b) is a plan for telephone transmission, (c) is a plan for data transmission, and (d) is a plan for providing an Internet service.
The QoS for each of the services is represented by QoS
1, QoS 2, QoS 3, and QoS 4. The QoS 1 for animation transmission is strictly controlled against error and delay, and is demanded in high quality image transmission in real time while the QoS 1 for telephone transmission allows some errors but is strictly controlled against delay.
The QoS 3 for data transmission allows some delay, but is strictly controlled against error.
The QoS 4 for Internet provides a service is not so strict against delay or error, but is provided at a lower cost.
The xDSL shown in FIG. 13 is short for various DSLs such as an ADSL, etc.
Each service depends on each path up to the access network, and the QoS of the path should be monitored based on the value of the demanded QoS. However, such a QoS management apparatus has not been developed.
BRIEF SUMMARY OF THE INVENTION
Object of the Invention As described above, the conventional QoS management apparatus has the problem that the QoS demanded for the paths cannot be precisely satisfied when there are various types of QoS demanded for each of the paths.
'The present: ir~rention teas t7een developed to sol~,re all the above des~~r_.ikaed prob7.eac~r>, aru~ .z:i.m ,~t previd..i.ng true Qo:~ management apparatus cap~al le ,v 1v' ~; r'~-~c~ i.;:;e 1 y sati.sfyi:ng t:he QoS demanded for the paths.
Surrunary of. the _Cnvent:ic>n The QoS managen'te.nl~ app~arat:z.:~ acr-.o:rdi_ng to the present invention co~'npr:i~e,~~:
a regisl~er~~d QoS where v.~lut~ f:, i= QcaS requested far each path is rec~i.ste.xred;
a QoS mon'~.t~or fo:r_ rro,~nit~oring rrlm~: current value of the QoS of' the ~>att~u anci means for ciete~'mini.r~g am op~:~~'ati.on for detFurrnining a predetermined o;per~'~ti.orv ciepr:zlc:~°.i_rr~::! c.~ri t:ivr:
r<~tio of i he value of i,:he QoS rnon::~..tor~c:~ t;a'.y' t~irE: Qo.3 rr'ir::ru~~ for t;:~
the value of the QoS registered as a registered (,OoS.
With the' c:c~nfigurat:i_<_>rv, .:he ~ac::>S rrvanagement~
apparatus according to the present in ~Tr~nt i.on can precisely satisfy a demanded QuS.
In accordance with a fa.rst broad. aspect, the invention provides, a QoS rnanagert.ent a~:~paratm.s for managing a QoS of ~r Networ~~ cc.~rzta i.ru:'_vg ~ ~~ I~~ra l t: y r:of; paths, f~.~r which different QoS or C:os are rc.yu~~~t::~~d, c:: >rcy~>ri sing:
a regist.erEd Q,:aS, p.r cv:r c~r~c~ i ,~r.. eacrz of t:he plurality of path:>, for ~~t~r>rzro~ ',scr~ue ,:~f Qr.W rt~que;~~k:ed for the path;
Sa a QoS monitor, provided far each of the plurality of paths, for monitoring the current value of the QoS of the path; and operation determination means for comparing a value of the QoS obtained by monitoring through the QoS
monitor of the path with a value of the QoS registered in the registered QoS of the path, and for determining the next operation to be performed depending on the comparison result .
The operation determination function is characterized by comprising:
a timer for measuring a continuation time of the value of the QoS monitored by the QoS monitor;
a comparator for comparing the value of the QoS measured by the timer as a continuation time longer than a predetermined time; and a function of performing an operation predetermined corresponding to the comparison result obtained by the comparator.
The QoS is characterized by being determined by a BER
(Bit Error Rate) , the registered QoS being a registered BER, and the QoS monitor being a BER monitor.
The QoS is characterized by being determined by a UAS
(Unavailable Seconds), the registered QoS being a registered UAS, and the QoS monitor being a UAS monitor.
The QoS is characterized by being determined by a transfer delay of data packet, including CTD (Cell Transfer Delay) , the registered QoS being a registered transfer delay of data packet, including registered CTD, and the QoS monitor being a monitor for a transfer delay of data packet, including a CTD monitor.
The QoS is characterized by being determined by a delay variation of data packet, including CDV (Cell Delay _ 'j _ Variation), the registered QoS being a registered delay variation of data packet, including CDV, and the QoS monitor being a monitor for delay variation of data packet, including a CDV monitor.
The QoS is characterized by being determined by a loss of data packet, including CL (Cell Loss) , the registered QoS
being a registered loss of data packet, including CL, and the QoS monitor being a monitor for loss of data packet, including a CL monitor.
The operation determination function is characterized in that when the value of a QoS monitored by the QoS monitor does not satisfy the value of a QoS registered as the registered QoS, or when it is determined that there is a possibility of the monitored value not satisfying the registered value, the operation function so notifies a manager, and the manager activates a predetermined operation program.
The operation determination function is characterized in that when the value of a QoS monitored by the QoS monitor does not satisfy the value of a QoS registered as the registered QoS, or when it is determined that there is a possibility of the monitored value not satisfying the registered value, the operation function activates a predetermined operation program.
The predetermined operation program is characterized by containing a route amendment program of the path, and the route amendment program optimally utilizing network S
resources, and the program being executed considering the deterioration of the QoS accompanied by an amendment of a route.
In accordance with a second broad aspect, the invention provides a QoS management apparatus for managing a QoS of a network containing a plurality of paths for which different QoS are requested, comprising:
means for dividing the plurali~::y of paths into a plurality of service groups, and a service group comprising l0 a path or a group of paths having a plurality of similar QoS
requests to each other;
a registered QoS, provided for each of the plurality of service groups, for stor:~ng a value of a QoS
requested for the service group"
a QoS monitor, provided for each of the plurality of service groups, for monitoring a current value of the Qo5 of each path belonging to the service group by a time sharing system; and operation determirdatican means, provided for each of said plurality of service groups, for comparing a value of a QoS obtained by a QoS monitor of the service group with a value of a QoS registered :in a registered QoS of the service group, and for determining the next operation to be performed according to a comparison result"
The operation determinatiorx function is characterized in that when the currerst value of a QoS of a path in any of the service groups becomes smaller than the QoS value registered in the rega..stered QoS of the service group, the operation determining function determines that a QoS requested for the service group ~:~ not satisfactory.
The operation determination function is characterized in that when the current values of the QoS of all paths of the service groups become lower than the QoS
value registered in the registered QoS of the service group, the operation determining function determines that a QoS
requested for the service group is not satisfactory.
The operation determination function is characterized in that when, in the service group, the number of the paths whose current values of the QoS are lower than the QoS value registered in the registered QoS of the service group becomes larger than the number of the paths whose current values of the QoS are lower than the QoS value registered in the registered QoS of the service group, the operation determining function determines that the QoS
requested for the service group is not satisfactory.
In a QoS management apparatus for managing a QoS
when various services for which different QoS is requested are transmitted through a common line, the QoS corresponding to the service is characterized by being managed depending on the value of the QoS requested for the service.
In accordance with a third broad aspect, the invention provides a QoS management apparatus for managing a QoS when various services for which different QoS is requested or transmitted through a common line, the apparatus being adapted to: i) determine whether a current QoS value corresponding to one service does not satisfy a requested QoS but the current QoS value satisfies another requested QoS of another service and a current QoS value corresponding to the other service satisfies the requested QoS of the one service; ii) upon determining step i) is satisfied, exchanging routes between the one service and the other service.
9a In accordance with a fourth broad aspect, the invention provides a QoS management apparatus for managing a QoS when various services for which different QoS is requested are transmitted through a common line, the apparatus being adapted to: i) determine whether requested QoSs corresponding to the various services are satisfied with current QoS values; ii) upon determining step i) is satisfied, exchanging routes for the services so as to preferably distribute resources.
IO BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram showing an embodiment of the present invention;
FIG. 2 is a block diagram showing an example of the configuration more practical than that shown in FIG. 1;
FIG. 3 is a block diagram showing an example of the configuration of the operation determining function shown in FIG. 2;
FIG. 4 is a graph showing the effect of changing a route as an operation of the QoS management shown in FIG. 2;
FIG. 5 is a graph showing the appropriate distribution of the network resources as an operation of the QoS management shown in FIG. 2;
FIG. 6 is a graph showing the relationship between the requested QoS and the current value of the QoS when the apparatus shown in FIG. 1 is applied to various services;
FIG. 7 is a block diagram showing various types of QoS
shown in FIG. l;
FIG. 8 is a block diagram showing the QoS management for each service group;
FIG. 9 is a block diagram showing an extreme example of the case shown in FIG. 8;
FIG. 10 is a block diagram of another embodiment of the present invention;
FIG. 11 is a block diagram showing an example of the configuration of the network to which the present invention is applied;
FIG. 12 is a block diagram of the conventional apparatus;
and FIG. 13 is a block diagram of the network to which the present invention is applied.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The embodiments of the present invention will be described below in detail by referring to the attached drawings.
FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, 1-1, 1-2, 1-3, and 1-4 indicate paths . The QoS for each path has the value indicated by each of QoS 1, QoS 2, QoS 3, and QoS 4 shown in FIG. 1.
Each path is provided with a registered QoS, and the QoS
requested for the path is registered as a registered QoS.
That is, the QoS 1 is registered in a registered QoS 1-1-3 provided in the path 1-l, the QoS 2 is registered in a registered QoS 1-2-3 provided in the path 1-2, the QoS 3 is registered in a registered QoS 1-3-3 provided in the path 1-3, and the QoS 4 is registered in a registered QoS 1-4-3 provided in the path 1-4.
A QoS monitor 1-1-1 is provided to monitor the current value of the QoS of the path 1-1. A QoS monitor 1-2-1 is provided to monitor the current value of the QoS of the path 1-2. A QoS monitor 1-3-1 is provided to monitor the current value of the QoS of the path 1-3. A QoS monitor 1-4-1 is provided to monitor the current value of the QoS of the path 1-4.
An operation determining function 1-1-2 constantly compares the current value of the QoS of the path 1-1 measured by the QoS monitor 1-1-1 with the value of the QoS registered in the registered QoS 1-1-3, and determines the next operation to be performed based on the comparison result.
An operation determining function 1-2-2 constantly compares the current value of the QoS of the path 1-2 measured by the QoS monitor 1-2-1 with the value of the QoS registered in the registered QoS 1-2-3, and determines the next operation to be performed based on the comparison result.
Similarly, an operation determining function 1-3-2 constantly compares the current value of the QoS of the path 1-3 measured by the QoS monitor 1-3-1 with the value of the QoS registered in the registered QoS 1-3-3, and determines the next operation to be performed based on the comparison result. An operation determining function 1-4-2 constantly compares the current value of the QoS of the path 1-4 measured by the QoS monitor 1-4-1 with the value of the QoS registered in the registered QoS 1-4-3, and determines the next operation to be performed based on the comparison result.
Thus, since the QoS of each path is managed, the QoS can be precisely managed.
FIG. 2 is a block diagram of the embodiment more practical than that shown in FIG. 1. In FIG. 2, the QoS l, QoS 2, QoS
3, and QoS 4 are represented by the BER (Bit Error Rate) , and depends on each path.
The paths 1-1, 1-2, 1-3, and 1-4 shown in FIG. 1 are replaced with paths 2-1, 2-2, 2-3, and 2-4. The QoS monitors 1-1-1, 1-2-l, 1-3-1, and 1-4-1 shown in FIG. 1 are replaced with monitors 2-1-1, 2-2-1, 2-3-1, and 2-4-1. The operation determining functions 1-1-2, 1-2-2, 1-3-2, and 1-4-2 shown in FIG. 1 are replaced with operation determining functions 2-1-2, 2-2-2, 2-3-2, and 2-4-2. The registered QoS 1-1-3, 1-2-3, 1-3-3, and 1-4-3 shown in FIG. 1 are replaced with registered BERs 2-1-3, 2-2-3, 2-3-3, and 2-4-3. Thus, the apparatus shown in FIG. 2 can be obtained.
FIG. 3 is a block diagram showing an example of the internal configuration of the operation determining functions (2-1-2, 2-2-2, 2-3-2, and 2-4-2) shown in FIG. 2.
Since the operation determiningfunctions2-1-2, 2-2-2, 2-3-2, and 2-4-2 have the same internal configuration, the operation determining function 2-1-2 shown in FIG. 2 is described as an example, and is shown as a code 3-3 in FIG. 3.
Codes 3-1, 3-2, and 3-3 respectively indicates the 2-1, 2-1-l, and 2-1-3 shown in FIG. 2. The value of of QoSl 10-' is registered as a registered BER.
An operation determining function 3-3 includes a timer 3-3-1, a comparator 3-3-2, and an operating function 3-3-3.
The timer 3-3-1 receives a BER value monitored by the BER monitor 3-2, and outputs the BER value maintained longer than a predetermined time to the comparator 3-3-2.
For example, when the current value of the BER monitored by the BER monitor is 10-5, and does not satisfy the requested BER value of 10-', the current value of the BER is not accepted if the continuation time is within the range of the predetermined time set in the timer 3-3-1.
The current value of the BER continuing longer than a predetermined time reaches the comparator 3-3-2 from the BER
monitor 3-2 through the timer 3-3-1, and is compared with the value of the registered BER 3-4. When the current value of the BER does not satisfy the requested value of the BER
registered as a registered BER, then an operation predetermined by the operating function 3-3-3 is performed.
An operation to be performed by the operating function 3-3-3 depends on the service to be provided. Services to be provided are listed below.
1. Maintaining the QoS: To maintain a requested QoS, the schedule of, for example, amending a route for each time period, etc. , is determined. A requested QoS is compared with a realized QoS and indicated in a list and a graph. An accounting management can be performed relating to the requested QoS and the realized QoS.
2 . A manager is informed of a path which does not satisfy a requested QoS by raising an alarm, and the manager performs the next operation.
In this case, an alarm is raised also when there is the possibility that a requested QoS is not satisfactory.
3. Route amendment to a path: The route of the path which does not satisfy a requested QoS is amended. However, if the route amendment influences the QoS of another path, an agreement should be made, and the deterioration of the QoS
due to the amendment of the route should also be taken into account.
For example, in the left drawing shown in FIG. 4, the current value of the QoS (bold line) does not satisfy the requested QoS (by step indication) for a service A. However, since the current value of the QoS satisfies the requested QoS for a service B, satisfactory services can be provided for both services A and B as shown on the right in FIG. 4 when the routes are exchanged between the services A and B.
4. Preferred distribution of the network resources:
FIG. 5 is a graph showing the preferable distribution of the network resources. 10-5 BER is registered for the requested QoS of the service A (path A) . 10-3 BER is registered for the requested QoS of the service B (path B) (a QoS value shown in FIG. 5 is larger for a smaller BER value).
At this time, the route of the path A (assumed to be a route 1 ) has the BER value of 10-6, and the route of the path B (assumed to be a route 2) has the BER value of 10-9.
In this case, both paths A and B satisfy the requested QoS, but the path A should be the route 2 and the path B should be the route 1 for preferable distribution of the resources (by amending the state shown on the left to the state shown in the right shown in FIG. 5).
For example, in an ATM (Asynchronous Transfer Mode) , the value of the registered QoS is enhanced by fully using an assigned band.
When a request to provide a new path is issued, a band is assigned to the new path, and the band of the existing path is decreased, thereby reducing the value of the registered QoS. However, the value of the requested QoS is still satisfactory. This can be realized as an appropriate distribution of the resources.
Back in FIG. 3, when the current value 10-5 of the BER
monitored by the BER monitor 3-2 continues for a predetermined time, it is compared with the registered BER value of 10-' by the comparator 3-3-2. In this case, since the current value of the BER does not satisfy the value of the QoS indicated by the registered BER value, the operating function 3-3-3 is activated.
When the operating function 3-3-3 is activated, a predetermined program is activated to automatically perform an amending operation, or the manager is invoked to activate a predetermined program.
FIG. 6 is a graph showing the QoS management for various services. As shown in FIG. 6, different QoS values are requested for six services a, b, c, d, e, and f.
In FIG. 6, the requested QoS value is indicated by the line forming steps, and the current value of the QoS obtained by the QoS monitor is indicated by the bold line. The value of the BER of the path on one line is, as a mean value for a long time, is determined by the physical property of the line and the occupation band of the path on the line. The value fluctuate for a short time about the mean value for the long time.
The momentary fluctuation in the short time fluctuation is removed by the timer 3-3-1, and the operation described above is performed on the fluctuation not removed by the timer 3-3-1.
According to the embodiments shown in FIGS . 2 and 3, the BER is used as the QoS.
However, the physical amount other than the BER can obviously be used as the QoS.
FIG. 7 is a block diagram showing an example of the physical amount indicating the QoS other than the BER. In FIG. 7, the UAS (Unavailable Seconds) is used as the QoS in (a) , the CTD (Cell Transfer Delay) is used as the QoS in (b) , the CDV (Cell Delay Variation) is used as the QoS in (c) , and the CL (Cell Loss) is used as the QoS in (d).
Depending on the type of service, an appropriate value can be set as the QoS.
According to the embodiment shown in FIG. 1, the QoS of each path is managed in path units . However, in most cases, there are path groups having the same or similar requested QoS value.
These path groups are classified as a service group, and the QoS is managed for each service group.
FIG. 8 is a block diagram showing another embodiment of the present invention. Since the values of the QoS 1, QoS
2, QoS 3, and QoS 4 requested for each path are similar to each other, these paths are classified as a service group 1.
Since the values of the QoS 5, QoS 6, QoS 7, QoS 8, QoS 9, QoS 10, and QoS 11 are similar to each other, these paths are classified as a service group 2. The path whose requested QoS value is QoS 12 is a service group 3.
In an extreme case, for example, as shown in FIG. 9, all paths can be classified as one service group.
FIG. 10 is a block diagram of the QoS management performed for each service group. In this case, a QoS monitor, an operation determining function, and a registered QoS are provided for each service group. However, the QoS monitor provided for a service group is switched in a time sharing manner when monitoring the current value of the QoS of each path in the service group. Therefore, the following methods can be used when an operation is determined by an operation determining function:
1. When the current value of the QoS of any path does not satisfy the registered QoS value, it is determined for the service group that the requested QoS value is not satisfactory.
2. When the current value of the QoS of any path satisfies the registered QoS value, it is determined for the service group that the requested QoS value is satisfactory.
1~
3. A majority decision is made. "that is, wYaen the number of paths whose registered QoS values are not satisfactory becomes larger than. the number of paths whose registered QoS values are satisfactory, it is determined for the service group that the requested QoS value is not satisfactory.
As described above, according to the present invention, the QoS is managed for each path. Therefore, the QoS can be precisely managed. The route of a path whose requested QoS is not satisfactory care be changed to realize the requested QoS. Furthermore, the distribution of the resources of a network can be optimized.
The invention may be embodied in other specific forms without departing from the spirit or essential characteristic thereof. The present embodiments are therefore to be considered ia~ all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended Claims rather than by the foregoing description and all changes which come within the meaning and range of equivalency of the Claims are therefore intended to be embraced therein.
The QoS for each of the services is represented by QoS
1, QoS 2, QoS 3, and QoS 4. The QoS 1 for animation transmission is strictly controlled against error and delay, and is demanded in high quality image transmission in real time while the QoS 1 for telephone transmission allows some errors but is strictly controlled against delay.
The QoS 3 for data transmission allows some delay, but is strictly controlled against error.
The QoS 4 for Internet provides a service is not so strict against delay or error, but is provided at a lower cost.
The xDSL shown in FIG. 13 is short for various DSLs such as an ADSL, etc.
Each service depends on each path up to the access network, and the QoS of the path should be monitored based on the value of the demanded QoS. However, such a QoS management apparatus has not been developed.
BRIEF SUMMARY OF THE INVENTION
Object of the Invention As described above, the conventional QoS management apparatus has the problem that the QoS demanded for the paths cannot be precisely satisfied when there are various types of QoS demanded for each of the paths.
'The present: ir~rention teas t7een developed to sol~,re all the above des~~r_.ikaed prob7.eac~r>, aru~ .z:i.m ,~t previd..i.ng true Qo:~ management apparatus cap~al le ,v 1v' ~; r'~-~c~ i.;:;e 1 y sati.sfyi:ng t:he QoS demanded for the paths.
Surrunary of. the _Cnvent:ic>n The QoS managen'te.nl~ app~arat:z.:~ acr-.o:rdi_ng to the present invention co~'npr:i~e,~~:
a regisl~er~~d QoS where v.~lut~ f:, i= QcaS requested far each path is rec~i.ste.xred;
a QoS mon'~.t~or fo:r_ rro,~nit~oring rrlm~: current value of the QoS of' the ~>att~u anci means for ciete~'mini.r~g am op~:~~'ati.on for detFurrnining a predetermined o;per~'~ti.orv ciepr:zlc:~°.i_rr~::! c.~ri t:ivr:
r<~tio of i he value of i,:he QoS rnon::~..tor~c:~ t;a'.y' t~irE: Qo.3 rr'ir::ru~~ for t;:~
the value of the QoS registered as a registered (,OoS.
With the' c:c~nfigurat:i_<_>rv, .:he ~ac::>S rrvanagement~
apparatus according to the present in ~Tr~nt i.on can precisely satisfy a demanded QuS.
In accordance with a fa.rst broad. aspect, the invention provides, a QoS rnanagert.ent a~:~paratm.s for managing a QoS of ~r Networ~~ cc.~rzta i.ru:'_vg ~ ~~ I~~ra l t: y r:of; paths, f~.~r which different QoS or C:os are rc.yu~~~t::~~d, c:: >rcy~>ri sing:
a regist.erEd Q,:aS, p.r cv:r c~r~c~ i ,~r.. eacrz of t:he plurality of path:>, for ~~t~r>rzro~ ',scr~ue ,:~f Qr.W rt~que;~~k:ed for the path;
Sa a QoS monitor, provided far each of the plurality of paths, for monitoring the current value of the QoS of the path; and operation determination means for comparing a value of the QoS obtained by monitoring through the QoS
monitor of the path with a value of the QoS registered in the registered QoS of the path, and for determining the next operation to be performed depending on the comparison result .
The operation determination function is characterized by comprising:
a timer for measuring a continuation time of the value of the QoS monitored by the QoS monitor;
a comparator for comparing the value of the QoS measured by the timer as a continuation time longer than a predetermined time; and a function of performing an operation predetermined corresponding to the comparison result obtained by the comparator.
The QoS is characterized by being determined by a BER
(Bit Error Rate) , the registered QoS being a registered BER, and the QoS monitor being a BER monitor.
The QoS is characterized by being determined by a UAS
(Unavailable Seconds), the registered QoS being a registered UAS, and the QoS monitor being a UAS monitor.
The QoS is characterized by being determined by a transfer delay of data packet, including CTD (Cell Transfer Delay) , the registered QoS being a registered transfer delay of data packet, including registered CTD, and the QoS monitor being a monitor for a transfer delay of data packet, including a CTD monitor.
The QoS is characterized by being determined by a delay variation of data packet, including CDV (Cell Delay _ 'j _ Variation), the registered QoS being a registered delay variation of data packet, including CDV, and the QoS monitor being a monitor for delay variation of data packet, including a CDV monitor.
The QoS is characterized by being determined by a loss of data packet, including CL (Cell Loss) , the registered QoS
being a registered loss of data packet, including CL, and the QoS monitor being a monitor for loss of data packet, including a CL monitor.
The operation determination function is characterized in that when the value of a QoS monitored by the QoS monitor does not satisfy the value of a QoS registered as the registered QoS, or when it is determined that there is a possibility of the monitored value not satisfying the registered value, the operation function so notifies a manager, and the manager activates a predetermined operation program.
The operation determination function is characterized in that when the value of a QoS monitored by the QoS monitor does not satisfy the value of a QoS registered as the registered QoS, or when it is determined that there is a possibility of the monitored value not satisfying the registered value, the operation function activates a predetermined operation program.
The predetermined operation program is characterized by containing a route amendment program of the path, and the route amendment program optimally utilizing network S
resources, and the program being executed considering the deterioration of the QoS accompanied by an amendment of a route.
In accordance with a second broad aspect, the invention provides a QoS management apparatus for managing a QoS of a network containing a plurality of paths for which different QoS are requested, comprising:
means for dividing the plurali~::y of paths into a plurality of service groups, and a service group comprising l0 a path or a group of paths having a plurality of similar QoS
requests to each other;
a registered QoS, provided for each of the plurality of service groups, for stor:~ng a value of a QoS
requested for the service group"
a QoS monitor, provided for each of the plurality of service groups, for monitoring a current value of the Qo5 of each path belonging to the service group by a time sharing system; and operation determirdatican means, provided for each of said plurality of service groups, for comparing a value of a QoS obtained by a QoS monitor of the service group with a value of a QoS registered :in a registered QoS of the service group, and for determining the next operation to be performed according to a comparison result"
The operation determinatiorx function is characterized in that when the currerst value of a QoS of a path in any of the service groups becomes smaller than the QoS value registered in the rega..stered QoS of the service group, the operation determining function determines that a QoS requested for the service group ~:~ not satisfactory.
The operation determination function is characterized in that when the current values of the QoS of all paths of the service groups become lower than the QoS
value registered in the registered QoS of the service group, the operation determining function determines that a QoS
requested for the service group is not satisfactory.
The operation determination function is characterized in that when, in the service group, the number of the paths whose current values of the QoS are lower than the QoS value registered in the registered QoS of the service group becomes larger than the number of the paths whose current values of the QoS are lower than the QoS value registered in the registered QoS of the service group, the operation determining function determines that the QoS
requested for the service group is not satisfactory.
In a QoS management apparatus for managing a QoS
when various services for which different QoS is requested are transmitted through a common line, the QoS corresponding to the service is characterized by being managed depending on the value of the QoS requested for the service.
In accordance with a third broad aspect, the invention provides a QoS management apparatus for managing a QoS when various services for which different QoS is requested or transmitted through a common line, the apparatus being adapted to: i) determine whether a current QoS value corresponding to one service does not satisfy a requested QoS but the current QoS value satisfies another requested QoS of another service and a current QoS value corresponding to the other service satisfies the requested QoS of the one service; ii) upon determining step i) is satisfied, exchanging routes between the one service and the other service.
9a In accordance with a fourth broad aspect, the invention provides a QoS management apparatus for managing a QoS when various services for which different QoS is requested are transmitted through a common line, the apparatus being adapted to: i) determine whether requested QoSs corresponding to the various services are satisfied with current QoS values; ii) upon determining step i) is satisfied, exchanging routes for the services so as to preferably distribute resources.
IO BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram showing an embodiment of the present invention;
FIG. 2 is a block diagram showing an example of the configuration more practical than that shown in FIG. 1;
FIG. 3 is a block diagram showing an example of the configuration of the operation determining function shown in FIG. 2;
FIG. 4 is a graph showing the effect of changing a route as an operation of the QoS management shown in FIG. 2;
FIG. 5 is a graph showing the appropriate distribution of the network resources as an operation of the QoS management shown in FIG. 2;
FIG. 6 is a graph showing the relationship between the requested QoS and the current value of the QoS when the apparatus shown in FIG. 1 is applied to various services;
FIG. 7 is a block diagram showing various types of QoS
shown in FIG. l;
FIG. 8 is a block diagram showing the QoS management for each service group;
FIG. 9 is a block diagram showing an extreme example of the case shown in FIG. 8;
FIG. 10 is a block diagram of another embodiment of the present invention;
FIG. 11 is a block diagram showing an example of the configuration of the network to which the present invention is applied;
FIG. 12 is a block diagram of the conventional apparatus;
and FIG. 13 is a block diagram of the network to which the present invention is applied.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The embodiments of the present invention will be described below in detail by referring to the attached drawings.
FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, 1-1, 1-2, 1-3, and 1-4 indicate paths . The QoS for each path has the value indicated by each of QoS 1, QoS 2, QoS 3, and QoS 4 shown in FIG. 1.
Each path is provided with a registered QoS, and the QoS
requested for the path is registered as a registered QoS.
That is, the QoS 1 is registered in a registered QoS 1-1-3 provided in the path 1-l, the QoS 2 is registered in a registered QoS 1-2-3 provided in the path 1-2, the QoS 3 is registered in a registered QoS 1-3-3 provided in the path 1-3, and the QoS 4 is registered in a registered QoS 1-4-3 provided in the path 1-4.
A QoS monitor 1-1-1 is provided to monitor the current value of the QoS of the path 1-1. A QoS monitor 1-2-1 is provided to monitor the current value of the QoS of the path 1-2. A QoS monitor 1-3-1 is provided to monitor the current value of the QoS of the path 1-3. A QoS monitor 1-4-1 is provided to monitor the current value of the QoS of the path 1-4.
An operation determining function 1-1-2 constantly compares the current value of the QoS of the path 1-1 measured by the QoS monitor 1-1-1 with the value of the QoS registered in the registered QoS 1-1-3, and determines the next operation to be performed based on the comparison result.
An operation determining function 1-2-2 constantly compares the current value of the QoS of the path 1-2 measured by the QoS monitor 1-2-1 with the value of the QoS registered in the registered QoS 1-2-3, and determines the next operation to be performed based on the comparison result.
Similarly, an operation determining function 1-3-2 constantly compares the current value of the QoS of the path 1-3 measured by the QoS monitor 1-3-1 with the value of the QoS registered in the registered QoS 1-3-3, and determines the next operation to be performed based on the comparison result. An operation determining function 1-4-2 constantly compares the current value of the QoS of the path 1-4 measured by the QoS monitor 1-4-1 with the value of the QoS registered in the registered QoS 1-4-3, and determines the next operation to be performed based on the comparison result.
Thus, since the QoS of each path is managed, the QoS can be precisely managed.
FIG. 2 is a block diagram of the embodiment more practical than that shown in FIG. 1. In FIG. 2, the QoS l, QoS 2, QoS
3, and QoS 4 are represented by the BER (Bit Error Rate) , and depends on each path.
The paths 1-1, 1-2, 1-3, and 1-4 shown in FIG. 1 are replaced with paths 2-1, 2-2, 2-3, and 2-4. The QoS monitors 1-1-1, 1-2-l, 1-3-1, and 1-4-1 shown in FIG. 1 are replaced with monitors 2-1-1, 2-2-1, 2-3-1, and 2-4-1. The operation determining functions 1-1-2, 1-2-2, 1-3-2, and 1-4-2 shown in FIG. 1 are replaced with operation determining functions 2-1-2, 2-2-2, 2-3-2, and 2-4-2. The registered QoS 1-1-3, 1-2-3, 1-3-3, and 1-4-3 shown in FIG. 1 are replaced with registered BERs 2-1-3, 2-2-3, 2-3-3, and 2-4-3. Thus, the apparatus shown in FIG. 2 can be obtained.
FIG. 3 is a block diagram showing an example of the internal configuration of the operation determining functions (2-1-2, 2-2-2, 2-3-2, and 2-4-2) shown in FIG. 2.
Since the operation determiningfunctions2-1-2, 2-2-2, 2-3-2, and 2-4-2 have the same internal configuration, the operation determining function 2-1-2 shown in FIG. 2 is described as an example, and is shown as a code 3-3 in FIG. 3.
Codes 3-1, 3-2, and 3-3 respectively indicates the 2-1, 2-1-l, and 2-1-3 shown in FIG. 2. The value of of QoSl 10-' is registered as a registered BER.
An operation determining function 3-3 includes a timer 3-3-1, a comparator 3-3-2, and an operating function 3-3-3.
The timer 3-3-1 receives a BER value monitored by the BER monitor 3-2, and outputs the BER value maintained longer than a predetermined time to the comparator 3-3-2.
For example, when the current value of the BER monitored by the BER monitor is 10-5, and does not satisfy the requested BER value of 10-', the current value of the BER is not accepted if the continuation time is within the range of the predetermined time set in the timer 3-3-1.
The current value of the BER continuing longer than a predetermined time reaches the comparator 3-3-2 from the BER
monitor 3-2 through the timer 3-3-1, and is compared with the value of the registered BER 3-4. When the current value of the BER does not satisfy the requested value of the BER
registered as a registered BER, then an operation predetermined by the operating function 3-3-3 is performed.
An operation to be performed by the operating function 3-3-3 depends on the service to be provided. Services to be provided are listed below.
1. Maintaining the QoS: To maintain a requested QoS, the schedule of, for example, amending a route for each time period, etc. , is determined. A requested QoS is compared with a realized QoS and indicated in a list and a graph. An accounting management can be performed relating to the requested QoS and the realized QoS.
2 . A manager is informed of a path which does not satisfy a requested QoS by raising an alarm, and the manager performs the next operation.
In this case, an alarm is raised also when there is the possibility that a requested QoS is not satisfactory.
3. Route amendment to a path: The route of the path which does not satisfy a requested QoS is amended. However, if the route amendment influences the QoS of another path, an agreement should be made, and the deterioration of the QoS
due to the amendment of the route should also be taken into account.
For example, in the left drawing shown in FIG. 4, the current value of the QoS (bold line) does not satisfy the requested QoS (by step indication) for a service A. However, since the current value of the QoS satisfies the requested QoS for a service B, satisfactory services can be provided for both services A and B as shown on the right in FIG. 4 when the routes are exchanged between the services A and B.
4. Preferred distribution of the network resources:
FIG. 5 is a graph showing the preferable distribution of the network resources. 10-5 BER is registered for the requested QoS of the service A (path A) . 10-3 BER is registered for the requested QoS of the service B (path B) (a QoS value shown in FIG. 5 is larger for a smaller BER value).
At this time, the route of the path A (assumed to be a route 1 ) has the BER value of 10-6, and the route of the path B (assumed to be a route 2) has the BER value of 10-9.
In this case, both paths A and B satisfy the requested QoS, but the path A should be the route 2 and the path B should be the route 1 for preferable distribution of the resources (by amending the state shown on the left to the state shown in the right shown in FIG. 5).
For example, in an ATM (Asynchronous Transfer Mode) , the value of the registered QoS is enhanced by fully using an assigned band.
When a request to provide a new path is issued, a band is assigned to the new path, and the band of the existing path is decreased, thereby reducing the value of the registered QoS. However, the value of the requested QoS is still satisfactory. This can be realized as an appropriate distribution of the resources.
Back in FIG. 3, when the current value 10-5 of the BER
monitored by the BER monitor 3-2 continues for a predetermined time, it is compared with the registered BER value of 10-' by the comparator 3-3-2. In this case, since the current value of the BER does not satisfy the value of the QoS indicated by the registered BER value, the operating function 3-3-3 is activated.
When the operating function 3-3-3 is activated, a predetermined program is activated to automatically perform an amending operation, or the manager is invoked to activate a predetermined program.
FIG. 6 is a graph showing the QoS management for various services. As shown in FIG. 6, different QoS values are requested for six services a, b, c, d, e, and f.
In FIG. 6, the requested QoS value is indicated by the line forming steps, and the current value of the QoS obtained by the QoS monitor is indicated by the bold line. The value of the BER of the path on one line is, as a mean value for a long time, is determined by the physical property of the line and the occupation band of the path on the line. The value fluctuate for a short time about the mean value for the long time.
The momentary fluctuation in the short time fluctuation is removed by the timer 3-3-1, and the operation described above is performed on the fluctuation not removed by the timer 3-3-1.
According to the embodiments shown in FIGS . 2 and 3, the BER is used as the QoS.
However, the physical amount other than the BER can obviously be used as the QoS.
FIG. 7 is a block diagram showing an example of the physical amount indicating the QoS other than the BER. In FIG. 7, the UAS (Unavailable Seconds) is used as the QoS in (a) , the CTD (Cell Transfer Delay) is used as the QoS in (b) , the CDV (Cell Delay Variation) is used as the QoS in (c) , and the CL (Cell Loss) is used as the QoS in (d).
Depending on the type of service, an appropriate value can be set as the QoS.
According to the embodiment shown in FIG. 1, the QoS of each path is managed in path units . However, in most cases, there are path groups having the same or similar requested QoS value.
These path groups are classified as a service group, and the QoS is managed for each service group.
FIG. 8 is a block diagram showing another embodiment of the present invention. Since the values of the QoS 1, QoS
2, QoS 3, and QoS 4 requested for each path are similar to each other, these paths are classified as a service group 1.
Since the values of the QoS 5, QoS 6, QoS 7, QoS 8, QoS 9, QoS 10, and QoS 11 are similar to each other, these paths are classified as a service group 2. The path whose requested QoS value is QoS 12 is a service group 3.
In an extreme case, for example, as shown in FIG. 9, all paths can be classified as one service group.
FIG. 10 is a block diagram of the QoS management performed for each service group. In this case, a QoS monitor, an operation determining function, and a registered QoS are provided for each service group. However, the QoS monitor provided for a service group is switched in a time sharing manner when monitoring the current value of the QoS of each path in the service group. Therefore, the following methods can be used when an operation is determined by an operation determining function:
1. When the current value of the QoS of any path does not satisfy the registered QoS value, it is determined for the service group that the requested QoS value is not satisfactory.
2. When the current value of the QoS of any path satisfies the registered QoS value, it is determined for the service group that the requested QoS value is satisfactory.
1~
3. A majority decision is made. "that is, wYaen the number of paths whose registered QoS values are not satisfactory becomes larger than. the number of paths whose registered QoS values are satisfactory, it is determined for the service group that the requested QoS value is not satisfactory.
As described above, according to the present invention, the QoS is managed for each path. Therefore, the QoS can be precisely managed. The route of a path whose requested QoS is not satisfactory care be changed to realize the requested QoS. Furthermore, the distribution of the resources of a network can be optimized.
The invention may be embodied in other specific forms without departing from the spirit or essential characteristic thereof. The present embodiments are therefore to be considered ia~ all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended Claims rather than by the foregoing description and all changes which come within the meaning and range of equivalency of the Claims are therefore intended to be embraced therein.
Claims (15)
1. A QoS management apparatus for managing a QoS of a network containing a plurality of paths for which different QoS or Cos are requested, comprising:
a registered QoS, provided for each of the plurality of paths, for storing values of QoS requested for the path;
a QoS monitor, provided for each of the plurality of paths, for monitoring a current value of the QoS of the path; and operation determination means for comparing a value of the QoS obtained by monitoring through the QoS monitor of the path with a value of the QoS registered in the registered QoS
of the path, and for determining a next operation to be performed depending on a comparison result.
a registered QoS, provided for each of the plurality of paths, for storing values of QoS requested for the path;
a QoS monitor, provided for each of the plurality of paths, for monitoring a current value of the QoS of the path; and operation determination means for comparing a value of the QoS obtained by monitoring through the QoS monitor of the path with a value of the QoS registered in the registered QoS
of the path, and for determining a next operation to be performed depending on a comparison result.
2. The apparatus according to Claim 1, wherein said operation determination means comprises:
a timer for measuring a continuation time of a value of the QoS monitored by said QoS monitor;
a comparator for comparing a value of the QoS measured by said timer as a continuation time longer than a predetermined time with a value of the QoS registered as the registered QoS; and operation means for performing an operation predetermined corresponding to the comparison result obtained by said comparator.
a timer for measuring a continuation time of a value of the QoS monitored by said QoS monitor;
a comparator for comparing a value of the QoS measured by said timer as a continuation time longer than a predetermined time with a value of the QoS registered as the registered QoS; and operation means for performing an operation predetermined corresponding to the comparison result obtained by said comparator.
3. The apparatus according to Claim 1, wherein said QoS is determined by a BER, said registered QoS is a registered BER, and said QoS monitor is a BER monitor.
4. The apparatus according to Claim 1, wherein said QoS is determined by a UAS, said registered QoS is a registered UAS, and said QoS monitor is a UAS monitor.
5. The apparatus according to Claim 1, wherein said QoS
is determined by a time delay of data packet, including CTD;
said registered QoS is a registered time delay of data packet, including a registered CTD;
and said QoS monitor is a monitor for time delay of data packet, including a CTD monitor.
is determined by a time delay of data packet, including CTD;
said registered QoS is a registered time delay of data packet, including a registered CTD;
and said QoS monitor is a monitor for time delay of data packet, including a CTD monitor.
6. The apparatus according to Claim 1, wherein said QoS
is determined by a delay variation of data packet, including CDV;
said registered QoS is a registered delay variation of data packet, including CDV;
and said QoS monitor is a monitor for a delay variation data packet, including a CDV monitor.
is determined by a delay variation of data packet, including CDV;
said registered QoS is a registered delay variation of data packet, including CDV;
and said QoS monitor is a monitor for a delay variation data packet, including a CDV monitor.
7. The apparatus according to Claim 1, wherein said QoS
is determined by a loss of data packet, including CL;
said registered QoS is a registered loss of data packet, including a registered CL;
and said QoS monitor is a monitor for loss of data packet, including a CL monitor.
is determined by a loss of data packet, including CL;
said registered QoS is a registered loss of data packet, including a registered CL;
and said QoS monitor is a monitor for loss of data packet, including a CL monitor.
8. The apparatus according to Claim 2, wherein when a value of a QoS monitored by said QoS monitor does not satisfy a value of a QoS registered as the registered QoS, or when it is determined that there is a possibility of the monitored value not satisfying the registered value, said operation means so notifies a manager, and the manager activates a predetermined operation program.
9. The apparatus according to Claim 2, wherein when a value of a QoS monitored by said QoS monitor does not satisfy a value of a QoS registered as the registered QoS, or when it is determined that there is a possibility of the monitored value not satisfying the registered value, said operation means activates a predetermined operation program.
10. The apparatus according to Claim 8, wherein said predetermined operation program contains a route amendment program of the path, said route amendment program optimally utilizes network resources, and said program is executed considering deterioration of the QoS accompanied by an amendment of a route.
11. The apparatus according to Claim 9, wherein said predetermined operation program contains a route amendment program of the path, said route amendment program optimally utilizes network resources, and said program is executed considering deterioration of the QoS accompanied by an amendment of a route.
12. A QoS management apparatus for managing a QoS of a network containing a plurality of paths for which different QoS are requested, comprising:
means for dividing said plurality of paths into a plurality of service groups, and a service group comprising a path or a group of paths having a plurality of QoS requests similar to each other;
a registered QoS, provided for each of said plurality of service groups, for storing a value of a QoS requested for the service group;
a QoS monitor, provided for each of said plurality of service groups, for monitoring a current value of the QoS of each path belonging to the service group by a time sharing system; and operation determination means, provided for each of said plurality of service groups, for comparing a value of a QoS
obtained by a QoS monitor of the service group with a value of a QoS registered in a registered QoS of the service group, and for determining a next operation to be performed according to the comparison result.
means for dividing said plurality of paths into a plurality of service groups, and a service group comprising a path or a group of paths having a plurality of QoS requests similar to each other;
a registered QoS, provided for each of said plurality of service groups, for storing a value of a QoS requested for the service group;
a QoS monitor, provided for each of said plurality of service groups, for monitoring a current value of the QoS of each path belonging to the service group by a time sharing system; and operation determination means, provided for each of said plurality of service groups, for comparing a value of a QoS
obtained by a QoS monitor of the service group with a value of a QoS registered in a registered QoS of the service group, and for determining a next operation to be performed according to the comparison result.
13. The apparatus according to Claim 12, wherein when a current value of a QoS of a path in any of the service groups becomes lower than a QoS value registered in a registered QoS of the service group, said operation determination means determines that a QoS requested for the service group is not satisfactory.
14. The apparatus according to Claim 12, wherein when current values of QoS of all paths of the service groups become lower than a QoS value registered in a registered QoS of the service group, said operation determination means determines that a QoS requested for the service group is not satisfactory.
15. The apparatus according to Claim 12, wherein when, in the service group, a number of paths whose current values of QoS are lower than a QoS value registered in a registered QoS of the service group becomes larger than a number of paths whose current values of QoS are lower than a Qos value registered in a registered QoS of the service group, said operation determination means determines that a QoS
requested for the service group is not satisfactory.
requested for the service group is not satisfactory.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10-156833 | 1998-05-22 | ||
| JP15683398A JP3576811B2 (en) | 1998-05-22 | 1998-05-22 | QoS management device |
Publications (2)
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|---|---|
| CA2272517A1 CA2272517A1 (en) | 1999-11-22 |
| CA2272517C true CA2272517C (en) | 2004-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002272517A Expired - Fee Related CA2272517C (en) | 1998-05-22 | 1999-05-19 | Qos management apparatus |
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| US (1) | US6690649B1 (en) |
| JP (1) | JP3576811B2 (en) |
| CA (1) | CA2272517C (en) |
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| US6871233B1 (en) * | 2000-07-05 | 2005-03-22 | Lucent Technologies Inc. | Method and apparatus for use in specifying and insuring service-level quality of service in computer networks |
| US20030172160A9 (en) * | 2001-01-10 | 2003-09-11 | Widegren Ina B. | Method and apparatus for coordinating end-to-end quality of service requirements for media flows in a multimedia session |
| US7957721B2 (en) * | 2001-02-13 | 2011-06-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Coordinated subscriber access handling for shared network support |
| US7269157B2 (en) * | 2001-04-10 | 2007-09-11 | Internap Network Services Corporation | System and method to assure network service levels with intelligent routing |
| US7065764B1 (en) | 2001-07-20 | 2006-06-20 | Netrendered, Inc. | Dynamically allocated cluster system |
| US7133365B2 (en) * | 2001-11-02 | 2006-11-07 | Internap Network Services Corporation | System and method to provide routing control of information over networks |
| US7561517B2 (en) * | 2001-11-02 | 2009-07-14 | Internap Network Services Corporation | Passive route control of data networks |
| US7222190B2 (en) * | 2001-11-02 | 2007-05-22 | Internap Network Services Corporation | System and method to provide routing control of information over data networks |
| US7668966B2 (en) * | 2001-11-02 | 2010-02-23 | Internap Network Services Corporation | Data network controller |
| US7155123B2 (en) * | 2002-05-10 | 2006-12-26 | Lucent Technologies Inc. | Method and apparatus for locating faults in an optical network |
| WO2004056047A1 (en) * | 2002-12-13 | 2004-07-01 | Internap Network Services Corporation | Topology aware route control |
| US20070133428A1 (en) * | 2005-12-13 | 2007-06-14 | Carolyn Taylor | System and method for providing dynamic QoS based upon group profiles |
| EP1798897B1 (en) | 2005-12-14 | 2008-06-18 | NTT DoCoMo, Inc. | Apparatus and method for determining transmission policies for a plurality of applications of different types |
| US20070248008A1 (en) * | 2006-04-24 | 2007-10-25 | Fujitsu Limited | Management support method, management support system, management support apparatus and recording medium |
| JP2007318740A (en) * | 2006-04-24 | 2007-12-06 | Fujitsu Ltd | Management support method, management support system, management support apparatus and computer program |
| US7639619B2 (en) * | 2006-06-07 | 2009-12-29 | Sharp Laboratories Of America, Inc. | System and method for quality of service (QoS) setup of a network segment having an intermediate device |
| US7787381B2 (en) * | 2006-12-13 | 2010-08-31 | At&T Intellectual Property I, L.P. | Methods and apparatus to manage network transport paths in accordance with network policies |
| CN103312531B (en) * | 2012-03-15 | 2017-02-22 | 华为技术有限公司 | Quality of experience (QOE) acquiring method, device and QOE guaranteeing method and device |
| US10003536B2 (en) | 2013-07-25 | 2018-06-19 | Grigore Raileanu | System and method for managing bandwidth usage rates in a packet-switched network |
| US9525638B2 (en) | 2013-10-15 | 2016-12-20 | Internap Corporation | Routing system for internet traffic |
| US10924408B2 (en) | 2014-11-07 | 2021-02-16 | Noction, Inc. | System and method for optimizing traffic in packet-switched networks with internet exchanges |
| US9769070B2 (en) | 2015-01-28 | 2017-09-19 | Maxim Basunov | System and method of providing a platform for optimizing traffic through a computer network with distributed routing domains interconnected through data center interconnect links |
| US10908966B1 (en) | 2016-09-07 | 2021-02-02 | Pure Storage, Inc. | Adapting target service times in a storage system |
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| JPH0341845A (en) | 1989-07-07 | 1991-02-22 | Nec Corp | Packet transmission system |
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| JPH06188880A (en) | 1992-12-21 | 1994-07-08 | Fujitsu Ltd | Connectionless interserver band control system |
| JPH06216927A (en) | 1993-01-20 | 1994-08-05 | Fujitsu Ltd | Burst information communication control system for atm network |
| JPH06276254A (en) | 1993-03-17 | 1994-09-30 | Nippon Telegr & Teleph Corp <Ntt> | Communication control equipment |
| JPH07154397A (en) | 1993-11-26 | 1995-06-16 | Nec Corp | Method and device for reducing cell abandonment |
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| JP3652759B2 (en) | 1995-11-27 | 2005-05-25 | 富士通株式会社 | Packet flow monitoring and control method |
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| JPH1079740A (en) * | 1996-09-03 | 1998-03-24 | Hitachi Ltd | Router device using atm switch |
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| US6091709A (en) * | 1997-11-25 | 2000-07-18 | International Business Machines Corporation | Quality of service management for packet switched networks |
| JPH11275079A (en) | 1998-03-18 | 1999-10-08 | Ando Electric Co Ltd | Asynchronous transfer network system and service quality management method in the asynchronous transfer network system |
| US6154776A (en) * | 1998-03-20 | 2000-11-28 | Sun Microsystems, Inc. | Quality of service allocation on a network |
| US6201971B1 (en) * | 1998-03-26 | 2001-03-13 | Nokia Mobile Phones Ltd. | Apparatus, and associated method for controlling service degradation performance of communications in a radio communication system |
| US6404735B1 (en) * | 1998-04-30 | 2002-06-11 | Nortel Networks Limited | Methods and apparatus for distributed control of a multi-class network |
| US6360076B1 (en) * | 1999-10-06 | 2002-03-19 | Telefonaktiebolaget L M Ericsson (Publ) | Method of broadcasting a quality over-the-air multicast |
-
1998
- 1998-05-22 JP JP15683398A patent/JP3576811B2/en not_active Expired - Fee Related
-
1999
- 1999-05-19 CA CA002272517A patent/CA2272517C/en not_active Expired - Fee Related
- 1999-05-20 US US09/315,432 patent/US6690649B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2272517A1 (en) | 1999-11-22 |
| US6690649B1 (en) | 2004-02-10 |
| JP3576811B2 (en) | 2004-10-13 |
| JPH11341008A (en) | 1999-12-10 |
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