Approach for discovering network resources

• US 20070097969A1
• Filed: 11/02/2005
• Published: 05/03/2007
• Est. Priority Date: 11/02/2005
• Status: Abandoned Application

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Regnier, Alain
• Application Number:
  US11/265,835
• Publication Number:
  US 20070097969A1
• Time in Patent Office: Days
• US Class Current: 370/390
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 41/00 Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services

Abstract

An approach is provided for discovering network resources using s Simple Binary Resource Discovery (SBRD) message structure. According to the approach, a network resource is configured to generate and transmit a plurality of multicast “Hello” messages to a plurality of recipients to indicate that the network resource is available and ready. If the network resource receives a multicast “Query” message from a particular recipient from the plurality of recipients, the network resource determines whether the multicast “Query” message includes identification data that identifies the network resource or type data that matches one or more type attributes of the network resource. If so, then the network resource generates and transmits a unicast “Acknowledge” message to the particular recipient to acknowledge the multicast “Query” message and to indicate that the network resource is available and ready. The time intervals in between the multicast “Hello” messages may increase in duration over time.

Claims

1. A network resource configured to:

generate and transmit a plurality of multicast messages to a plurality of recipients over a communications network, wherein;

each multicast message from the plurality of multicast messages indicates that the network resource is available and ready, and

time intervals between the transmission of multicast messages from the plurality of multicast messages increase in duration over time;

in response to receiving a multicast query message from a particular recipient from the plurality of recipients,

determining whether the multicast query message contains identification data that identifies the network resource or type data that matches one or more type attributes of the network resource; and

if the multicast query message contains identification data that identifies the network resource or type data that matches one or more type attributes of the network resource, then the network resource generating and transmitting a unicast message to the particular recipient to acknowledge the multicast query message and to indicate that the network resource is available and ready.

2. The network resource as recited in claim 1, wherein the time intervals between the transmission of the multicast messages from the plurality of multicast messages increase linearly in duration over time.

3. The network resource as recited in claim 1, wherein the time intervals between the transmission of the multicast messages from the plurality of multicast messages increase non-linearly in duration over time.

4. The network resource as recited in claim 1, wherein the network resource is further configured to enter a sleep mode after a specified time has elapsed or a specified number of multicast messages have been transmitted by the network resource without the network resource receiving an acknowledge signal.

5. The network resource as recited in claim 1, wherein the plurality of multicast messages are transmitted to a multicast Internet Protocol address and port.

6. The network resource as recited in claim 1, wherein each of the plurality of multicast messages includes

timestamp data the indicates a time when the multicast message was transmitted, and

data that indicates an amount of time that the multicast message is valid from the time indicated by the timestamp data.

7. The network resource as recited in claim 1, wherein each of the plurality of multicast messages includes identification data that identifies the network resource.

8. The network resource as recited in claim 1, wherein each of the plurality of multicast messages includes resource type data that identifies one or more type attributes of the network resource.

9. The network resource as recited in claim 1, wherein each of the plurality of multicast messages includes message type data that identifies the type of the multicast message.

10. The network resource as recited in claim 1, wherein each of the plurality of multicast messages includes

a first URI that references a generic message data model, and

a second URI that references a private message data model.

a first URI that references a generic message data model, and

a second URI that references a private message data model.

11. The network resource as recited in claim 10, wherein each of the plurality of multicast messages includes

first version data that references a current version of the generic message data model, and

second version data that references a current version of the private message data model.

12. The network resource as recited in claim 1, wherein the plurality of multicast messages, the multicast query message and the unicast message all conform to a binary message format.