Convergence and classification of data packets in a centralized communication system

• US 7,961,736 B2
• Filed: 09/15/2003
• Issued: 06/14/2011
• Est. Priority Date: 09/26/2002
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Laboratories of America Incorporated (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Ayyagari, Deepak
• Primary Examiner(s): Wu; Jianye
• Application Number:
  US10/663,866
• Publication Number:
  US 20040073939A1
• Time in Patent Office: 2,829 Days
• Field of Search: 370389-39543, 370/395.51, 370/395.52, 370/420, 370/463, 370/469
• US Class Current: 370/395.3
• CPC Class Codes: H04L 69/32 Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A method of converting application data to transport data in a power line communication system includes receiving application data from an application in a device through a service access point. The connection type and connection specification for the application data is then analyzed to determine if a connection exists for the application data. If a connection exists for the application data, mapping the application data is mapped into transport data.

Claims

1. A method of converting application data to transport data in a power line communication system, the method comprising:

receiving application data in a transport protocol layer from an application in a device through a service access point, the service access point being one of a plurality of service access points of the transport protocol layer;

applying classifier rules associated with the service access point to the application data received through the service access point to determine if a connection through a lower protocol layer exists for the application data, including;

determining if the application data matches matching criteria of a particular classifier rule; and

if the application data matches matching criteria of the particular classifier rule, associating a globally unique connection identifier with the particular classifier rule, encapsulating the application data into a payload of a transport message, associating the globally unique connection identifier with the transport message and the service access point, and transmitting the transport messages through a connection of the power line communication system identified by the globally unique connection identifier of the particular classifier rule, wherein

each classifier rule includes a priority;

applying the classifier rules includes applying the classifier rules to the application data in an order defined by the priorities of the classifier rules;

wherein the connection includes the globally unique connection identifier and a connection type selected from at least one of a continuous grant service (CGS) type, a period grant service (PGS) type, and a priority aperiodic grant service (PAGS) type; and

the connection identifier is globally unique over the power line communication system and identifies the connection to which the transport message carrying the application data payload belongs; and

transmitting through the connection includes transmitting through the connection having the selected connection type.

2. The method of claim 1, the method comprising automatically establishing a connection if none exists, comprising:

generating a connection specification based upon the application data and the service access point; and

establishing a connection based upon the connection specification; and

encapsulating the application data into transport messages for that connection.

3. The method of claim 1, wherein receiving application data from an application further comprises receiving connection-oriented application data from the application.

4. The method of claim 1, wherein receiving application data further comprises:

receiving connectionless application data from the application; and

encapsulating the connectionless application data into transport messages for a power line communication system connection;

wherein the power line communication system is connection-oriented.

14. The method of claim 1, wherein:

each classifier rule includes a priority; and

if multiple classifier rules include an identical connection identifier, applying the classifier rules includes applying the classifier rules including the identical connection identifier to the application data in an order defined by the priorities of the classifier rules including the identical connection identifier.

15. The method of claim 1, wherein:

each classifier rule includes at least one classification parameter;

each classification parameter includes a parameter identification and a value; and

the parameter identification identifies a field in the application data for comparison with the associated value.

16. The method of claim 15, wherein for a classifier rule having a plurality of classification parameters with identical parameter identifications, determining that the application data matches the classification parameters with the identical parameter identifications if the application data matches at least one of the classification parameters with the identical parameter identifications.

17. The method of claim 1, wherein the connection having the CGS type is one in which the connection is continually monitored or used, the PGS type is one in which the connection is used for isochronous applications, and the PAGS type is one in which the connection is used for high-priority traffic and low priority best effort applications.

18. The method of claim 1, further comprising connecting the application to the connection using one of at least three different connection processes, each connection process corresponding to one of the at least three connection types.

5. A method of transmitting data on a network, the method comprising:

receiving an incoming data packet from an application on a device at one of a plurality of service access points of a first protocol layer;

classifying the data packet in the first protocol layer in a classifier associated with the service access point, including;

determining an order of rules associated with the classifier to apply to the data packet, where each rule includes a rule priority, at least two of the rules include a same connection identifier, and where the order of rules is defined by the rule priorities of the classifier rules;

applying the rules to the data packet in the order defined by the rule priorities of the classifier rules when the connection identifier is the same, including when applying a particular rule to the data packet;

for each classification parameter of the rule, comparing a field of the data packet identified by a parameter ID of the classification parameter with a value of the classification parameter; and

if for each classification parameter of the rule, a matching value is found in the data packet, associating a globally unique connection identifier with the service access point and the particular classifier rule, causing the packet to be associated with a connection associated with the globally unique connection identifier of the rule that is established at an interface between the first protocol layer and a second protocol layer, wherein the second protocol layer is a lower level protocol layer;

routing the packet to the connection, wherein;

the connection includes the globally unique connection identifier and a connection type selected from at least one of a continuous grant service (CGS) type, a period grant service (PGS) type, and a priority aperiodic grant service (PAGS) type; and

the connection identifier is globally unique over the power line communication system and identifies the connection to which the packet belongs; and

transmitting the data through the connection having the selected connection type.

6. The method of claim 5, the method comprising fragmenting the packet into smaller packets as needed based upon the packet size.

7. The method of claim 5, the method comprising fragmenting the packet into smaller packets as needed depending upon the bandwidth of the connection.

8. The method of claim 5, classifying the data packet further comprising determining if a connection exists for the packet, and requesting a connection if a connection does not exist.

11. The method of claim 5, wherein each rule comprises:

a connection identifier;

a transport layer port; and

at least one classification parameter, each classification parameter including a parameter ID and a value.

12. The method of claim 11, wherein for each rule associated with audio/visual application data, the rule includes only one classification parameter.

13. The method of claim 12, wherein:

for each rule associated with audio/visual application data, the classification parameter of the rule includes a destination address ID as the parameter ID.

9. A method of classifying data packets for transmission in a communication system, the method comprising:

analyzing an incoming data packet according to a plurality of sets of parameters, wherein the sets of parameters analyzed depends upon a type of service access point from which the data packet came, each set of parameters includes a priority, and the sets of parameters are used in analyzing the data packet according to an order defined by the priorities of the sets of parameters;

if the set of parameters in the data packet match a first set from the plurality of sets of parameters associated with a globally unique connection identifier and match a second set from the plurality of sets of parameters associated with the globally unique connection identifier, associating the globally unique connection identifier with the access point and the packet, and applying the first and second sets of parameters to the data packet in the order defined by the priorities of the sets of parameters when the globally unique connection identifier is the same for both the first and the second sets of parameters;

routing the data packet to a connection associated with the connection identifier, wherein;

the connection includes the globally unique connection identifier and a connection type selected from at least one of a continuous grant service (CGS) type, a period grant service (PGS) type, and a priority aperiodic grant service (PAGS) type; and

the connection identifier is globally unique over the power line communication system and identifies the connection to which the packet belongs; and

transmitting the data packet in the communication system through the connection having the selected connection type.

10. The method of claim 9, the method comprising transmitting parameters of the data packet to a connection manager if the parameters of the data packet do not match a predefined set of parameters.