611 results about "Differentiated services" patented technology

A method called the evolvable interference management (EIM) method is disclosed in this patent for avoiding interference and collision and increasing network throughput and energy efficiency in wireless networks. EIM employs sensitive CSMA / CA, patching approaches, interference engineering, differentiated multichannel, detached dialogues, and / or spread spectrum techniques to solve the interference and QoS problems. EIM-based protocols can considerably increase network throughput and QoS differentiation capability as compared to IEEE 802.11e in multihop networking environments. Due to the improvements achievable by EIM, the techniques and mechanisms presented in this application may be applied to obtain an extension to IEEE 802.11 to better support differentiated service and power control in ad hoc networks and multihop wireless LANs. New protocols may also be designed based on EIM.

A method of automatically establishing differentiated services quality of service treatment for a return packet flow that is associated with an originating packet flow in a network is disclosed. The originating packet flow is received, and it is determined that one or more packets in the originating packet flow are marked with a DSCP value that matches a policy rule that instruct setting of a specified DSCP value to the return packet flow. In response, information identifying the originating packet flow and a second DSCP value for marking the return packet flow is created and stored. When a corresponding return packet flow is received and determined to be associated with the originating packet flow, packets of the return packet flow are automatically marked with the second DSCP value. Once the packet flow terminates, all stored information is removed.

The system of the present invention guarantees quality of service with respect to packets transmitted / received between an external network capable of providing differentiated services and a home network. The system includes a packet classifier, a marker, a priority class queue, a scheduler and a token bucket. The packet classifier classifies the packets according to addresses and traffic types. The marker allocates information on priorities to packets transmitted from the home network to the external network. The priority class queue has a plurality of queues classified according to the priorities. The scheduler services packets stored in the priority class queue according to the priorities. The token bucket drops packets, bandwidths of which are above a preset maximum bandwidth, when the packets are generated.

In one embodiment, a method includes receiving information on layer 2 topologies at a network device in a core network, mapping one or more Virtual Local Area Networks (VLANs) to the layer 2 topologies to provide differentiated services in said layer 2 topologies, defining multiple paths for each of the layer 2 topologies, and forwarding a packet received at the network device on one of the multiple paths. An apparatus for providing differentiated services in layer 2 topologies is also disclosed.

At least one substitute path is provided in place of a plurality of existing paths of a network to reallocate traffic carried by the plurality of existing paths. The total bandwidth needed to carry the traffic of the plurality of existing paths is determined. A proposed route is generated from the available links in the network. A portion of the bandwidth of a proposed route may be allocated to the needed bandwidth when the bandwidth of a proposed route is greater than or equal to the needed bandwidth. When the bandwidth of the proposed route is less than the needed bandwidth, at least one further route is generated, and the needed bandwidth is divided among the proposed route and the at least one further route such that a minimum number of further routes are generated.

The invention relates to a method for routing Internet traffic. The method generally includes the steps of receiving a packet from multimedia network, allocating a message block header for the packet, wherein the header is used to hold behavior aggregate values for internal router mapping, and queuing and routing the packet to a differentiated services network domain in a manner that ensures a specific QoS.

A method of monitoring telecommunications network traffic comprising the steps of: receiving a packet stream comprising packets each identified as belonging to one of at least three classes; calculating a difference between the numbers of packets received identified as belonging to a first and a second of said classes; and deriving a measure of traffic load on the network responsive to said difference. The invention also relates to a method for admission control based on the above method of monitoring and a method for overcoming admission control avoidance. It also relates to apparatus embodying these methods.

A service module incorporated within the network infrastructure intercepts packets communicated between a client and a server to determine whether the connection corresponds to one of a plurality of service applications that may supported by the service module. If so, the service module breaks the connection by terminating the connection with the client at the service module and opening a separate connection between the service module and the server. The service application may then perform application-specific process of the data communicated between the client and server. In order to increase processing efficiency associated with classifying the connection between the client and the server, the service module stores classification rules in a plurality of hashing tables, with hash conflicts arranged as an m-ary tree structure. This arrangement enables the service module to efficiently search for classification rules and resolve hash conflicts without imposing a significant processing penalty.

A network system which provides each terminal user with differentiated service, dynamically changing service profiles even in the middle of a communication session. A service control database maintains service profile definitions. When a mobile node registers with a foreign agent to initiate a conmiunication session, a service profile setting controller in the mobile node's home server sets up a service profile for the mobile user. When an event occurs within a service profile updating controller, it indicates that some control condition specified in the service profile is met. The service profile updating controller then makes access to the service control database to obtain a new service profile and the mobile node's foreign server forwards it to the foreign agent, to which the mobile node is attached. The service profile that has been established in relevant network nodes, including the home agent and foreign agent, is dynamically updated with the new one.

A method for distributing and conditioning IP traffic for mobile networks based on differentiated services, wherein edge / border routers are only required to maintain QoS profiles for related mobile stations. A new IP address or a new service level subscription or service level agreement of an mobile station is only sent to related edge / border routers. As a result, unnecessary IP traffic is significantly reduced. The routers in accordance with methods of the invention disregard the contents of an IP payload and therefore all of the IP addresses that a mobile station may posse. A mobile station is permitted to enter into a domain and obtain a desired quality of service (e.g., Gold or Standard service) without the need to maintain the service while moving through the domain.

A resource allocation device includes a database of user and service information, a resource allocation management unit for determining whether a service request agrees with a service level agreement and whether it accepts a resource allocation request, a service level agreement unit for negotiating the service level agreement with the user, sending the received service request to the resource allocation management unit, acquiring the result of the resource allocation request, and transmitting the result of the resource allocation request to the user, a routing information management unit for obtaining a network configuring information, storing the network configuring information in the database, discovering the path to provide the service and storing the discovered path in the database to be reused and a policy control management unit for deciding a policy according to whether the service request and the resource allocation request are accepted.

In a method and apparatus for signaling a voice over Internet protocol (VoIP) call based on a class of service in a VoIP service system, a database which includes VoIP signaling information differentiated by the class of VoIP service is built, and the database is retrieved by a service class assignment condition to produce a call setup message. The call setup message includes information related to the service class. Accordingly, it is possible to perform dynamic VoIP signaling by setting a differentiated service class based on each user or a primary factor of each class of the VoIP service.

The application proposes a network slice capability opening method, device and system. The method includes the following steps: a network slice service request sent by a third-party service server is received; network slice information of a current network is obtained according to the network slice service request; and according to the network slice information of the current network and a service requirement of the network slice service request, a network slice service is provided to the third-party service server, a capability opening service of the network slice service of a future network can be provided, and the third party obtains related information of network slices through capability opening, and selects or requests creation of different network slices to provide differentiated services for third-party services.

An improved method is described for providing Differentiated Services (Diffserv) traffic to a node in a network that implements a security method that discards duplicate packets received at the node. The method includes the step of identifying at least two service levels to be provided to received traffic and assigning separate sequential sequence numbers and different anti-replay bitmasks to each of the service levels. The anti-replay bitmask indicates the sequence numbers of packets that have been previously received at the node that should be compared against a received packet to determine whether a duplicate packet has been received. Such an arrangement reduces the possibility that traffic having lower priority is dropped as a security measure.

A method of handling data packets in a network device is disclosed. The method includes the steps of receiving an incoming packet at a port of the network device, determining a destination address for the incoming packet based on fields in the incoming packet and filtering the incoming packet through a fast filtering processor through the application of filter masks to determine at least one label of a virtual channel label and a differentiated services label. The method also includes modifying the at least one label and a classification of the incoming packet based when a result returned from a rules table indicates that the at least one label should be changed, producing an outgoing packet based on the filtering of the incoming packet; and discarding or forwarding the outgoing packet based upon the filtering.

The packet-buffering system and method of the present invention enables communication devices incorporating a full-mesh architecture to achieve bandwidth aggregation levels ordinarily associated with partial-mesh architectures. The packet-buffering invention uses a hierarchical memory structure having first and second packet-buffers to buffer packets between the input and output ports of the communication device. The received packets are organized by output port and priority level in the first packet buffer, which operates at the aggregate network rate of the communication device. The packets are then funneled to second packet buffers, having corresponding priority and output port assignments, at less than the aggregate network rate and which exhibit buffer depths that exceed that of the first packet buffer. The resulting hierarchical output-queued, packet-buffering system enables a communication system that exhibits a high degree of differentiated services with bandwidth guarantees and at high aggregation levels without experiencing head-of-line blocking.

An architecture, design, and realization for providing Quality of Service (QoS) to Internet Protocol (IP) networks based on a three-class differentiated service scheme where the service provider uses a resource management system and a schedule optimizer to enable the optimal use of bandwidth and buffer resources at each node or router along the various links between the ingress and egress points in a network. The resource reservation system checks to determine if sufficient bandwidth resources are available along the path requested by the customer for a particular class. The schedule optimizer ensures that sufficient buffer resource allocations and parameter settings are made to optimally reach the predetermined QoS criteria for each of the three classes. The system also contains a mechanism supporting resource reservations providing additional resources along alternative paths if the selected path links fail in the network.

Differentiated service classes on a label switch path are managed by comparing at least one packet field value included in a packet of data to mapping field values of a mapping that correlates the mapping field values with queues. The packet is stored into one of the queues based on the comparing. A first subset of the queues is scheduled using a first queue scheduling algorithm and a second subset of the queues is scheduled using a second queue scheduling algorithm. The packet is transmitted onto the label switch path in accordance with a predefined scheduling order of the first subset of the queues and the second subset of the queues.

A frame forwarding and discard architecture in a Differentiated Services network environment. The architecture comprises a discard logic for discarding a frame from a stream of incoming frames of the network environment in accordance with a discard algorithm, the frame being discarded if a predetermined congestion level in the network environment has been reached, and a predetermined backlog limit of a queue associated with the frame, has been reached. Scheduling logic is also provided for scheduling the order in which to transmit one or more enqueued frames of the network environment.

A method for scheduling cell transmissions through a switch with rate and delay guarantees and with low jitter is proposed. The method applies to a classic input-buffered N×N crossbar switch without speedup. The time axis is divided into frames each containing F time-slots. An N×N traffic rate matrix specifies a quantized guaranteed traffic rate from each input port to each output port. The traffic rate matrix is transformed into a permutation with NF elements which is decomposed into F permutations of N elements using a recursive and fair decomposition method. Each permutation is used to configure the crossbar switch for one time-slot within a frame of size F time-slots, and all F permutations result in a Frame Schedule. In the frame schedule, the expected Inter-Departure Time (IDT) between cells in a flow equals the Ideal IDT and the delay jitter is bounded and small. For fixed frame size F, an individual flow can often be scheduled in O(logN) steps, while a complete reconfiguration requires O(NlogN) steps when implemented in a serial processor. An RSVP or Differentiated Services-like algorithm can be used to reserve bandwidth and buffer space in an IP-router, an ATM switch or MPLS switch during a connection setup phase, and the proposed method can be used to schedule traffic in each router or switch. Best-effort traffic can be scheduled using any existing dynamic scheduling algorithm to fill the remaining unused switch capacity within each Frame. The scheduling algorithm also supports multicast traffic.

Methods to achieve bounded router buffer sizes and Quality of Service guarantees for traffic flows in a packet-switched network are described. The network can be an Internet Protocol (IP) network, a Differentiated Services network, an MPLS network, wireless mesh network or an optical network. The routers can use input queueing, possibly in combination with crosspoint queueing and / or output queueing. Routers may schedule QoS-enabled traffic flows to ensure a bounded normalized service lead / lag. Each QoS-enabled traffic flow will buffer O(K) packets per router, where K is an integer bound on the normalized service lead / lag. Three flow-scheduling methods are analysed. Non-work-conserving flow-scheduling methods can guarantee a bound on the normalized service lead / lag, while work-conserving flow-scheduling methods typically cannot guarantee the same small bound. The amount of buffering required in a router can be reduced significantly, the network links can operate near peak capacity, and strict QoS guarantees can be achieved.

A model is given for performance evaluation of IP computer networks that are dominated by congestion-controlled traffic. The model includes heterogeneous TCP flows, UDP flows, short-lived TCP flows, and TCP flows in a differentiated services network. The performance of large-scale networks is estimated where flows may encounter multiple congested links.

A system and method that enables session-based and non-session-based application services to be controlled and managed within the IMS / NGN architecture. The IMS / NGN architecture includes a service layer and a transport layer. IMS service control functions are implemented within the service layer, and RACF and transport functions are implemented within the transport layer. The transport functions include access and core network functions, which have corresponding QoS resources. The access or core network function includes an application service control function (ASCF), which includes a PD-FE and a functional element for inspecting packet data flows, and identifying and classifying application services associated with the flows. The ASCF is employed to signal the IMS service control functions on behalf of non-session-based application services, and to reserve and allocate the QoS resources needed to support packet data flows associated with the non-session-based services. As a result, service providers can provide users or subscribers of such non-session-based services with guaranteed or differentiated QoS and / or differentiated service plans, thereby allowing charges to be calculated for the non-session-based services and service plans that are commensurate with the value of the respective service or plan.

The invention provides a mixed storage system and method for supporting solid-state disk cache dynamic distribution. The mixed storage method is characterized in that the mixed storage system is constructed through a solid-state disk and a magnetic disk, and the solid-state disk serves as a cache of the magnetic disk; the load characteristics of applications and the cache hit ratio of the solid-state disk are monitored in real time, performance models of the applications are built, and the cache space of the solid-state disk is dynamically distributed according to the performance requirements of the applications and changes of the load characteristics. According to the solid-state disk cache management method, the cache space of the solid-state disk can be reasonably distributed according to the performance requirements of the applications, and an application-level cache partition service is achieved; due to the fact that the cache space of the solid-state disk of the applications is further divided into a cache reading section and a cache writing section, dirty data blocks and the page copying and rubbish recycling cost caused by the dirty data blocks are reduced; meanwhile, the idle cache space of the solid-state disk is distributed to the applications according to the cache use efficiency of the applications, and therefore the cache hit ratio of the solid-state disk of the mixed storage system and the overall performance of the mixed storage system are improved.

A practical economic and technical model for building commercial-grade electronic file delivery services that provide the same scale, predictability, and differentiated service levels as physical courier services traditionally used to move electronic data on physical media. Systems and methods for providing such services using a charge-back scheme based on congestion pricing are described.

A highly scalable system and method for supporting (mim,max) based Service Level Agreements (SLA) on outbound bandwidth usage for a plurality of customers whose applications (e.g.,Web sites) are hosted by a server farm that consists of a very large number of servers. The system employs a feedback system that enforces the outbound link bandwidth SLAs by regulating the inbound traffic to a server or server farm. Inbound traffic is admitted to servers using a rate denoted as Rt(i,j), which is the amount of the ith customer's jth type of traffic that can be admitted within a service cycle time to servers which support the ith customer. A centralized device computes Rt(i,j) based on the history of admitted inbound traffic to servers, the history of generated outbound traffic from servers, and the SLAs of various customers. The Rt(i,j) value is then relayed to one or more inbound traffic limiters that regulate the inbound traffic using the rates Rt(i,j) in a given service cycle time. The process of computing and deploying Rt(i,j) values is repeated periodically. In this manner, the system provides a method by which differentiated services can be provided to various types of traffic, the generation of output from a server or a server farm is avoided if that output cannot be delivered to end users, and revenue can be maximized when allocating bandwidth beyond the minimums.

An apparatus and method for transmitting multimedia data between wireless and wired networks. The method includes receiving frames of a first communication protocol type from a first network and converting the received frames into frames of a second communication protocol type, determining the transmission priority order of the frames that are converted into the second communication protocol type, based on packet information of the received frames, and transmitting the frames to a second network based on the determined transmission priority order. In the method, a transmission priority order is determined based on a differentiated services field codepoint (DSCP) value in a type of service (ToS) of an IP packet when converting frames of a first protocol type, which is the IEEE 802.3 protocol, into those of a second protocol type, which is IEEE 802.11 protocol, thereby securing the QoS of the transmission.

A method, performed by a fixed wireless router device, may include receiving a packet from a Long Term Evolution network, where the packet is associated with a particular Long Term Evolution Quality of Service class and mapping the particular Long Term Evolution Quality of Service class to a particular Differentiated Services Core Point Quality of Service class. The method may further include assigning a Differentiated Services Core Point Quality of Service class to the packet based on the particular Differentiated Services Core Point Quality of Service class and forwarding the packet to particular device associated with a customer premises network serviced by the fixed wireless router device, based on a priority associated with the assigned Differentiated Services Core Point Quality of Service class.