摘要:
A method for marking data packets of a data transmission flow pertaining to an end-to-end connection within a packet network is disclosed. The priority value is calculated based on at least one service quality parameter attributed to the data transmission flow, and upon a network feedback parameter indicative of the state of congestion within the packet network. A marker device adapted for performing the method is described as well.
摘要:
The invention relates to a method for use in a telecommunication system to generate an acceptance decision during a decision cycle that comprises whether to accept an incoming packet of a data stream or not in a buffer (BUF). The incoming packet (P) has a drop priority (DP) being one of a plurality of arranged drop priorities. The method comprises determining for a drop priority parameter (DPP) an actual drop priority parameter value (DPPact) out of the plurality of drop priorities; and comparing the drop priority parameter (DPP) with the drop priority (DP) of the packet (P) in order to generate the acceptance decision. The method further comprises that the step of determining the actual drop priority parameter value (DPPact) comprises determining a previous drop priority parameter value (DPPprev) by means of any one of an initial value (DPPinit) and a previous actual drop priority parameter value (DPPact′) having been determined during one of a previous decision cycle; and updating a queue occupancy variable (Q) as a function of a previous re-scaled queue occupancy value (RE-Qact′) having been determined during one of a previous decision cycle and providing thereby an intermediate queue occupancy value (Qint); and re-calculating the intermediate queue occupancy value (Qint) of the queue occupancy variable (Q) in function of instantaneous queue occupancy information (INF-Qins) of the buffer (BUF) and providing thereby an actual queue occupancy value (Qact); and comparing the actual queue occupancy value (Qact) with any one of a minimum threshold (Tmin) and a maximum threshold (Tmax) and providing thereby a result (RES (UP; DO; REM)); and according to the (RES (UP; DO; RET)) re-scaling the actual queue occupancy value (Qact) and the previous drop priority parameter value (DPPprev) and providing thereby, respectively, a re-scaled queue occupancy value (RE-Qact) and the actual drop priority parameter value (DPPact).
摘要:
The present invention relates to a marking determining method and a related device for determining a packet marking of packets of an incoming packet-flow, in order to keep the packets in conformance with a traffic policy. The determining is based on an actual value of a traffic reservation parameter, while the traffic reservation parameter is a measure of available network resources dedicated to packets of said incoming packet-flow having a pre-assigned priority. The determining further is based on the pre-assigned priority of the packets of the incoming packet flow. The marking method a first steps of holding a threshold value for the traffic reservation parameter, while the threshold value is lying between a minimum and a maximum value of the traffic reservation parameter. A second step is the metering the actual value of the traffic reservation parameter and a last step of determining the packet marking of the packets only based on the actual value of the traffic reservation parameter if the actual value of the traffic reservation parameter exceeds the threshold value for the traffic reservation parameter.
摘要:
The present invention relates to a relay unit (21) for use in a data communication system (1) operable to transmit multicast traffic, and adapted to receive a membership report (61) from a particular station (11), whereby a membership of a particular multicast group is notified. A relay unit according to the invention is characterized in that the relay unit is further adapted: to query (71, 72) a plurality of multicast routers (41 to 44) over a plurality of virtual broadcast domains (51, 52) as to whether that particular multicast group is supported, to elect one virtual broadcast domain (51) out of the plurality of virtual broadcast domains, over which one multicast router (41) out of the plurality of multicast routers has notified (81) support of that particular multicast group, to report the membership to that multicast router over that virtual broadcast domain, to transmit a particular multicast content (91), related to that particular multicast group and originating from that multicast router, from that virtual broadcast domain towards that particular station. The present invention also relates to a method for relaying multicast traffic within a data communication system.
摘要:
The present invention relates to a method for accounting a particular user accessing a prepaid service, which prepaid service being supplied by a service provider, which communication device being coupled to the service provider via an access control unit, and comprising the steps of: sending an authorization from an authentication server to the access control unit to authorize the particular user to access the prepaid service, thereupon, granting the communication device an access to the prepaid service. A method according to the invention further comprises the steps of: sending a notification from the access control unit to an accounting server to notify that the particular user gained access to the service provider, decrementing a quota allotted to the particular user according to a service usage, after the quota is exhausted, sending a request from the accounting server to the access control unit to disconnect the particular user from the service provider, thereupon, locking the access to the service provider. The present invention also relates to an access control unit.
摘要:
Customer triggered resource reservation requests (131) are granted or refused in an access node (104) on the basis of available resources on downlinks (102) between the access node (104) and customer premises, and eventually uplinks (105) between the access node (104) and an aggregation network (106). Network triggered resource reservation requests (121) are granted or refused in a central resource admission control device (108) on the basis of knowledge of available resources in the aggregation network (106) and the contents of an admission control report (123) received from the access node (104). The admission control report (123) is generated by the access node (104) on the basis of available resources on downlinks (102) between the access node (104) and customer premises, and eventually uplinks (105) between the access node (104) and an aggregation network (106). The access node (104) thus coordinates the granting and refusing of customer triggered resource reservation requests (131) and network triggered resource reservation requests (121) for the downlinks (102) and eventually the uplinks (105) extending from this access node (104).
摘要:
The present invention relates to an access control unit (21) of a data communication network (61) comprising an access control means (101) adapted to receive an authorization (111) from an authentication server (51), whereby a particular user (15) is authorized to access said data communication network, and thereupon to grant said particular user an access (106) to said data communication network. An access control unit according to the invention is characterized in that said access control means is further adapted to derive, from an additional information element (112) encoded into said authorization, an association (114) for said particular user between a particular payload type (Ipv6) and a particular virtual network (VLAN2) overlaying over said data communication network, and in that said access control unit further comprises a frame classifier (102) coupled to said access control means (via 103), and adapted to tag particular untagged frames (121) entering said data communication network, related to said particular user and carrying said particular payload type, with a particular virtual network identifier (VID2) of said particular virtual network. The present invention also relates to a method for controlling the access to a data communication network, and to an authentication server for use in cooperation with the access control unit.
摘要:
Method for securing communication in a local area network switch (AN) comprising a user interface (UI) and a network interface (NI), comprises the steps of extracting a source address (MACi) from each packet received by said Local area network switch (AN) and storing said address (MACi) together with associated information into a address forwarding table (FT) comprised in said Local area network switch (AN) is characterised in that a distinction is made between source addresses received from the user interface (UI) and the network interface (NI), such that upon detecting that a source address (MACi) contained within a newly received packet at the user interface (UI) was already stored as a source address received at the network interface (NI), said newly received packet will be discarded and its source address contained therein will not be stored within said address forwarding table (FT).