Resource reservation
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsAnders Eriksson, Christian Gehrmann
Life of this patent
Estimating the term…
Abstract
A method is provided for achieving admission control to a public connectionless packet network. This provides a method of access control which allows service differentiation in a form which permits a user to receive a quality of service guarantee which is better than a “best effort” service. Each transmission by a user across the network includes a ticket message sent to the user from the network. The ticket message includes information about the priority level of the transmission, and can be used in a connectionless network to determine the resources available for future transmission requests.
Claims11
A method of reserving network resources for a transmission, the method comprising:
- at an access node in the network, receiving resource reservation requests from sending network users connected thereto, each resource reservation request specifying an intended destination and a bandwidth requirement;
- in response to each received resource reservation request, performing an admission control procedure;
- in the event that the resource reservation request passes admission control, transmitting a request across the network to the intended destination associated therewith to allow other nodes to perform admission control procedures;
- in the event that the resource reservation request passes all admission control procedures to the intended destination, sending from the access node to the sending network user associated therewith a ticket message containing all necessary connection information;
- and
- allowing access to the network for a transmission from the sending network user when the transmission includes the ticket message,
- wherein the admission control procedure at the access node determines whether the required resource is available during a time slot by:
- determining what resources have already been allocated during said time slot, and what resources have already been reserved or requested,
- wherein sending a ticket from the access node to the sending network user during a time slot allocates the required resources for said time slot, and reserves the required resources for a second time slot immediately following said time slot.
A method of reserving network resources for a transmission from a first network user, the method comprising:
- defining a succession of time slots based on a clock signal;
- receiving at a node in the network a resource reservation request from the first network user to initiate a reservation;
- confirming that the required resource is available on a link from said node;
- sending from the network to the first network user a ticket message;
- and
- allowing access to the network for a transmission from the first network user when the transmission includes the ticket message, the ticket message being valid for a duration of one time slot.
A method of reserving network resources for a transmission from a first network user, the method comprising:
- receiving at a node in the network a resource reservation request from the first network user to initiate a reservation;
- confirming that the required resource is available on a first link from said node to a destination address;
- sending from the network to the first network user a ticket message containing connection information;
- and
- allowing access to the network for a transmission from the first network user when the transmission includes the ticket message,
- wherein, when it is determined that the link is no longer available and that an alternative link must be used, the ticket message is dropped.
A method of reserving network resources for a transmission from a first network user, the method comprising:
- receiving at a node in the network a resource reservation request from the first network user to initiate a reservation;
- confirming that the required resource is available on a link from said node;
- sending from the network to the first network user a ticket message containing connection information;
- and
- allowing access to the network for a transmission from the first network user when the transmission includes the ticket message,
- wherein it is determined whether to allow access to the network on the basis of resources allocated by previous ticket messages, and
- wherein the ticket message remains valid for a predetermined time period such that, in the event of a network error, the resources allocated thereby are released after expiry of the predetermined time period.
A method of reserving network resources for a transmission from a first network user, the method comprising:
- receiving at a node in the network a resource reservation request from the first network user to initiate a reservation;
- confirming that the required resource is available on a link from said node;
- sending from the network to the first network user a ticket message containing connection information;
- and
- allowing access to the network for a transmission from the first network user when the transmission includes the ticket message,
- the ticket message being valid for one time slot, as defined by the network, and including a digital signature, calculated on the basis of a key which is used only during a time slot in which said ticket message was generated.
A method of reserving network resources for a transmission from a first network user, the method comprising:
- receiving at a node in the network a resource reservation request from the first network user to initiate a reservation;
- confirming that the required resource is available on a link from said node;
- sending from the network to the first network user a ticket message containing all necessary connection information;
- and
- allowing access to the network for a transmission from the first network user when the transmission includes the ticket message,
- wherein the determination as to whether the required resource is available on the link is made at a central resource controller.
Dependencies are inferred from the claim text.