EP0398037A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Packet network with communication resource allocation and call set up control of higher quality of service
Assignee: Toshiba Corp
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Filing: 1990-04-20
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Granted: —
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Expires: 2010-04-20
Abstract
Abstract A packet network in which the qualities of service can be maintained uniformly for different communications of different priority level, in which the qualities of service can be maintained regardless of types of calls and data. In this packet network, a communication resource is subdivided into sub-resources (r₁...r N ) which are to be allocated to communications classified into communication classes (C1...CN), where an amount of communications within each sub-resource is controlled independently to satisfy a required quality of service. Also, first type of calls for which a ratio of a maximum transfer speed of each call with respect to a transfer speed of multiplexed line of the packet network is greater than a predetermined threshold value, and second type of calls which are not the first type of calls are distinguished, and a priority control to favor the first type of calls over the second type of calls is performed.
Inventors
- 👤 Hiroshi Esaki
- 👤 Yasuhiro Katsube
- 👤 Kazuaki Iwamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 19:45
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/54; H04L12/56; H04L12/5601; H04L12/5602; H04L2012/5629; H04L2012/5631; H04L2012/5632; H04L2012/5638; H04L2012/5646; H04L2012/5647; H04L2012/5651
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
84 words
A method of communication resource allocation in a packet network, CHARACTERIZED BY comprising the steps of: subdividing a communication resource of the packet network into a plurality of sub-resources in correspondence with communications classified into a plurality of communication classes; allocating one of the sub-resources to each one of the communication classes; and controlling an amount of communications within each sub-resource independently, such that a quality of service required by the communications to which each sub-resource is allocated can be satisfied within each sub-resource.
Claim 2
Independent Claim
84 words
A method of communication resource allocation in a packet network, CHARACTERIZED BY comprising the steps of: subdividing a communication resource of the packet network into a plurality of sub-resources in correspondence with communications classified into a plurality of communication classes; allocating one of the sub-resources to each one of the communication classes; and controlling an amount of communications within each sub-resource independently, such that a quality of service required by the communications to which each sub-resource is allocated can be satisfied within each sub-resource.
Claim 3
Dependent Claim
59 words
The method of claim 1, wherein at least one of the sub-resources are reserved as reserve sub-resources to be utilized to supplement other sub-resources allocated to the communication classes when any one of these other sub-resources allocated to the communication classes is insufficient to satisfy the quality of service required by the communications to which each sub-resource is allocated.
Claim 4
Dependent Claim
40 words
The method of claim 1, wherein the sub-resources supplement each other when any one of other sub-resources allocated to the communication classes is insufficient to satisfy the quality of service required by the communications to which each sub-resource is allocated.
Claim 5
Dependent Claim
49 words
The method of claim 1, wherein each one of the classified communication is further classified into a higher priority class and a lower priority class, with respect to which a priority control to favor the higher priority class over the lower priority class is performed by the packet network.
Claim 6
Dependent Claim
19 words
The method of claim 1, wherein the communication resource to be subdivided is a bandwidth of the packet network.
Claim 7
Dependent Claim
20 words
The method of claim 1, wherein the communication resource to be subdivided is a buffer capacity of the packet network.
Claim 8
Dependent Claim
29 words
The method of claim 1, wherein the communications are classified into the communication classes according to different requirement for the quality of service to be satisfied within each sub-resource.
Claim 9
Dependent Claim
21 words
The method of claim 7 wherein the quality of service to be satisfied within each sub-resource is a packet loss rate.
Claim 10
Dependent Claim
20 words
The method of claim 7 wherein the quality of service to be satisfied within each sub-resource is a transmission delay.
Claim 11
Dependent Claim
20 words
The method of claim 7 wherein the quality of service to be satisfied within each sub-resource is a communication speed.
Claim 12
Independent Claim
106 words
A method of call set up control in a packet network, CHARACTERIZED BY comprising the steps of: distinguishing first type of calls for which a ratio of a maximum transfer speed of each call with respect to a transfer speed of multiplexed line of the packet network is greater than a predetermined threshold value, and second type of calls which are not the first type of calls; and performing a priority control to favor the first type of calls over the second type of calls such that all packets of the first type of calls are transferred before any packet of the second type of calls.
Claim 13
Independent Claim
106 words
A method of call set up control in a packet network, CHARACTERIZED BY comprising the steps of: distinguishing first type of calls for which a ratio of a maximum transfer speed of each call with respect to a transfer speed of multiplexed line of the packet network is greater than a predetermined threshold value, and second type of calls which are not the first type of calls; and performing a priority control to favor the first type of calls over the second type of calls such that all packets of the first type of calls are transferred before any packet of the second type of calls.
Claim 14
Dependent Claim
52 words
The method of claim 11, wherein the priority control is performed by allocating a peak bit rate to the first type of calls when a sum of the maximum transfer speeds of the first type of calls is not greater than the transfer speed of the multiplexed line of the packet network.
Claim 15
Dependent Claim
154 words
The method of claim 11, wherein the performing step further comprises the steps of: granting admission to a set up of a requesting call only when the requesting call belongs to the first type of calls, a sum of the maximum transfer speeds of the first type of calls already set up and that of the requesting call is not greater than the transfer speed of the multiplexed line of the packet network, and a packet loss rate for the second type of calls already set up can be maintained at a satisfactory level even when the requesting call is set up; and granting admission to a set up of a requesting call only when the requesting call belongs to the second type of calls, and a packet loss rate for the second type of calls already set up can be maintained at a satisfactory level even when the requesting call is set up.
Claim 16
Dependent Claim
203 words
The method of claim 13, wherein whether the packet loss rate for the second type of calls already set up can be maintained at a satisfactory level even when the requesting call is set up is determined, when the requesting call belongs to the first type of calls, in the steps of: assuming that a time T is taken for transferring one packet at the maximum transfer speed when the ratio of the maximum transfer speed of the requesting call with respect to the transfer speed of multiplexed line of the packet network is equal to the predetermined threshold value; deriving a first probability f i (n) for n packets to be generated by the requesting call within the time T; deriving a second probability f(n) for n packets to be generated by the first type of calls already set up plus the requesting call within the time T, from the first probability f i (n); estimating the packet loss rate by assuming that (T-n) packets per time T of bandwidth can be used for the second type of calls at the second probability f(n); and comparing the estimated packet loss rate with a required packet loss rate required by the requesting call.
Claim 17
Dependent Claim
123 words
The method of claim 13, wherein whether the packet loss rate for the second type of calls already set up can be maintained at a satisfactory level even when the requesting call is set up is determined, when the requesting call belongs to the first type of calls, in the steps of: expressing a traffic characteristic of each call by the maximum transfer speed of each call and an average transfer speed of each call; estimating the packet loss rate by assuming that those packets arriving in excess of a prescribed number of packets transferrable within a given period of time are to be discarded; and comparing the estimated packet loss rate with a required packet loss rate required by the requesting call.
Claim 18
Dependent Claim
106 words
A call set up control device in a packet network, CHARACTERIZED BY comprising: means(111) for distinguishing first type of calls for which a ratio of a maximum transfer speed of each call with respect to a transfer speed of multiplexed line of the packet network is greater than a predetermined threshold value, and second type of calls which are not the first type of calls; and means(114) for performing a priority control to favor the first type of calls over the second type of calls such that all packets of the first type of calls are transferred before any packet of the second type of calls.
Claim 19
Dependent Claim
106 words
A call set up control device in a packet network, CHARACTERIZED BY comprising: means(111) for distinguishing first type of calls for which a ratio of a maximum transfer speed of each call with respect to a transfer speed of multiplexed line of the packet network is greater than a predetermined threshold value, and second type of calls which are not the first type of calls; and means(114) for performing a priority control to favor the first type of calls over the second type of calls such that all packets of the first type of calls are transferred before any packet of the second type of calls.
Claim 20
Dependent Claim
53 words
The device of claim 16, wherein performing means(114) performs the priority control by allocating a peak bit rate to the first type of calls when a sum of the maximum transfer speeds of the first type of calls is not greater than the transfer speed of the multiplexed line of the packet network.
Claim 21
Dependent Claim
157 words
The device of claim 16, wherein the performing means(114) further comprises: first means for granting admission to a set up of a requesting call only when the requesting call belongs to the first type of calls, a sum of the maximum transfer speeds of the first type of calls already set up and that of the requesting call is not greater than the transfer speed of the multiplexed line of the packet network, and a packet loss rate for the second type of calls already set up can be maintained at a satisfactory level even when the requesting call is set up; and second means for granting admission to a set up of a requesting call only when the requesting call belongs to the second type of calls, and a packet loss rate for the second type of calls already set up can be maintained at a satisfactory level even when the requesting call is set up.
Claim 22
Dependent Claim
200 words
The device of claim 18, wherein whether the packet loss rate for the second type of calls already set up can be maintained at a satisfactory level even when the requesting call is set up is determined, when the requesting call belongs to the first type of calls, by: assuming that a time T is taken for transferring one packet at the maximum transfer speed when the ratio, of the maximum transfer speed of the requesting call with respect to the transfer speed of multiplexed line of the packet network is equal to the predetermined threshold value; deriving a first probability f i (n) for n packets to be generated by the requesting call within the time T; deriving a second probability f(n) for n packets to be generated by the first type of calls already set up plus the requesting call within the time T, from the first probability f i (n); estimating the packet loss rate by assuming that (T-n) packets per time T of bandwidth can be used for the second type of calls at the second probability f(n); and comparing the estimated packet loss rate with a required packet loss rate required by the requesting call.
Claim 23
Dependent Claim
120 words
The device of claim 18, wherein whether the packet loss rate for the second type of calls already set up can be maintained at a satisfactory level even when the requesting call is set up is determined, when the requesting call belongs to the first type of calls, by: expressing a traffic characteristic of each call by the maximum transfer speed of each call and an average transfer speed of each call; estimating the packet loss rate by assuming that those packets arriving in excess of a prescribed number of packets transferrable within a given period of time are to be discarded; and comparing the estimated packet loss rate with a required packet loss rate required by the requesting call.
References Cited (Backward Citations)
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