NETWORK PROTOCOL PROCESSING SYSTEM AND NETWORK PROTOCOL PROCESSING METHOD

• US 20110270976A1
• Filed: 07/02/2009
• Published: 11/03/2011
• Est. Priority Date: 09/19/2008
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Yasuda, Masama, Ichino, Kiyohisa
• Granted Patent: US 8,838,782 B2
• Time in Patent Office: Days
• US Class Current: 709/224
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/193 at the transport layer, e.g. TCP related
• CPC Class Codes: H04L 47/2441 relying on flow classification, e.g. using integrated services [IntServ]
• CPC Class Codes: H04L 47/36 by determining packet size, e.g. maximum transfer unit [MTU]
• CPC Class Codes: H04L 47/821 Prioritising resource allocation or reservation requests
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/163 In-band adaptation of TCP data exchange; In-band control procedures

Abstract

In a network protocol processing system in which variables of each of TCP transmission processing and TCP reception processing depend on each other, asynchronous parallel processing is realized between a transmission processing block and a reception processing block for updated protocol processing. Specifically, the system includes a high priority queue for transferring control data to be processed with high priority, a low priority queue for control data other than the above control data, and priority control means for distributing the control data to two kinds of queues. When a request for session establishment and the session disconnection of a new TCP session is issued from an application during transmission of TCP data, data related with the session establishment and the session disconnection is notified preferentially through the high priority queue, and other control data is transferred through the low priority queue.

Claims

1. A network protocol processing system comprising:

a control data transferring unit configured to perform protocol processing of reception protocol processing and transmission protocol processing, in which variables of the protocol processing used as control data for TCP transmission processing and TCP reception processing based on TCP (Transmission Control Protocol) protocol depend on each other;

a TCP reception processing unit configured to perform the reception protocol processing on reception packets which have been arrived from a counter-side host, transfer the control data, which is used in the TCP transmission processing, of the control data updated through the reception protocol processing to said control data transferring unit, and transfer TCP data re-configured through the reception protocol processing to an application processing unit; and

a TCP transmission processing unit configured to perform the transmission protocol processing on transmission data for which a transmission request is issued from said application processing unit, transfer the control data, which is used in the TCP reception processing, of the control data updated through the transmission protocol processing to said control data transferring unit, and transfer a TCP packet generated through the transmission protocol processing to said counter-side host,

wherein said control data transferring unit

stores the control data sent from said TCP reception processing unit in a first queue section, and

stores the control data sent from said TCP transmission processing unit in a second queue section,

wherein said TCP transmission processing unit

monitors said first queue, and acquires the control data from said first queue section to update the variables of the TCP transmission processing, when the control data is stored in said first queue, and

monitors said second queue, and acquires the control data from said second queue section to update the variables of the TCP reception processing when the control data is stored in said second queue.

2. The network protocol processing system according to claim 1, wherein said control data transferring unit further

selects one from among a plurality of pairs of a queue of said first queue section and a queue of said second queue section based on a kind of the control data sent to said control data transferring unit from either of said TCP reception processing unit or said TCP transmission processing unit.

3. The network protocol processing system according to claim 1, wherein said control data transferring unit comprises:

a high priority queue which comprises a pair of a queue of said first queue section and a queue of said second queue section; and

a low priority queue which comprises a pair of another queue of said first queue section and another queue of said second queue section,

stores the control data having a first kind related to session establishment and session disconnection of each of network sessions and sent from either of said TCP reception processing unit or said TCP transmission processing unit, in said high priority queue,

stores the control data of a second kind other than the first kind sent from either of said TCP reception processing unit or said TCP transmission processing unit in said low priority queue, and

processes the control data stored in said high priority queue more preferentially than the control data stored in said low priority queue, when the control data are to be acquired from said high priority queue and said low priority queue.

4. The network protocol processing system according to claim 1, wherein said control data transferring unit comprises:

a high priority queue which comprises a pair of a queue of said first queue section and a queue of said second queue section;

a plurality of low priority sub queues, each of which comprises a pair of a sub queue of said first queue section and a sub queue of said second queue section, the pairs assigned with priority levels corresponding to network sessions; and

a priority data holding section configured to hold data of the priority levels corresponding to network sessions,

stores in said high priority queue, the control data having a first kind associated with session establishment and the session disconnection of each of said network sessions and sent from said TCP reception processing unit or said TCP transmission processing unit,

acquires the data of the priority level corresponding to one of said network sessions from said priority data holding section based on data of said network session sent from said TCP reception processing unit or said TCP transmission processing unit,

stores the control data of a second kind different from the first kind in one low priority sub queue, related to the acquired priority level, of said plurality of low priority sub queues,

processes the control data of the first kind stored in said high priority queue more preferentially than the control data stored in said plurality of low priority sub queues, and

processes the control data of the second kind stored in said plurality of low priority sub queues in order of higher priority level.

5. (canceled)

6. A control data transferring unit which perform protocol processing of reception protocol processing and transmission protocol processing, in which variables of the protocol processing used as control data for TCP transmission processing and TCP reception processing based on TCP (Transmission Control Protocol) protocol depend on each other,

wherein said control data transferring unit stores the control data sent from said TCP reception processing unit in a first queue section, and stores the control data sent from said TCP transmission processing unit in a second queue section, and

wherein the variables of the TCP transmission processing are updated based on the control data acquired from said first queue, and the variables of the TCP transmission processing are updated based on the control data acquired from said second queue.

7. A network protocol processing method which is implemented on a computer connected with a counter-side host, said network protocol processing method comprising:

performing protocol processing of reception protocol processing and transmission protocol processing, in which variables of the protocol processing, used as control data for each of TCP transmission processing and TCP reception processing based on TCP (Transmission Control Protocol) protocol depend on each other;

performing the reception protocol processing on reception packets which have been arrived from said counter-side host, storing in a first queue section, the control data, which is used in the TCP transmission processing, of the control data updated through the reception protocol processing, and providing TCP data re-configured through the reception protocol processing to an application side;

performing the transmission protocol processing on transmission data for which a transmission request is issued from said application side, storing in a second queue section, the control data, which is used in the TCP reception processing, of the control data updated through the transmission protocol processing, and sending a TCP packet generated through the transmission protocol processing to said counter-side host;

monitoring said first queue, and acquiring the control data from said first queue section to update the variables of the TCP transmission processing, when the control data is stored in said first queue section; and

monitoring said second queue, and acquiring the control data from said second queue section to update the variables of the TCP reception processing when the control data is stored in said second queue section.

8. The network protocol processing method according to claim 7, further comprising:

selecting one of a plurality of pairs of a queue of said first queue section and a queue of said second queue section based on a kind of the control data used in either of said TCP reception processing or said TCP transmission processing.

9. The network protocol processing method according to claim 7, further comprising:

storing the control data having a first kind related to session establishment and session disconnection of each of network sessions and sent from either of said TCP reception processing unit or said TCP transmission processing unit, in a high priority queue which comprises a pair of a queue of said first queue section and a queue of said second queue section, and the control data of a second kind other than the first kind sent in either of said TCP reception processing or said TCP transmission processing in a low priority queue which comprises a pair of another queue of said first queue section and another queue of said second queue section; and

processing the control data stored in said high priority queue more preferentially than the control data stored in said low priority queue, when the control data are to be acquired from said high priority queue and said low priority queue.

10. The network protocol processing method according to claim 7, further comprises:

holding data of priority levels corresponding to network sessions;

storing the control data having a first kind associated with session establishment and the session disconnection of each of network sessions and used in said TCP reception processing or said TCP transmission processing in a high priority queue which comprises a pair of a queue of said first queue section and a queue of said second queue section;

acquiring the data of the priority level corresponding to one of said network sessions, from the held data of the priority levels corresponding to said network sessions, based on data of said network session sent in said TCP reception processing or said TCP transmission processing;

storing the sent control data of a second kind different from the first kind in one low priority sub queue related to the acquired priority level, of said plurality of low priority sub queues, each of which comprises a pair of a sub queue of said first queue section and a sub queue of said second queue section, the pairs assigned with the priority levels;

processing the control data of the first kind stored in said high priority queue more preferentially than the control data stored in said plurality of low priority sub queues, and

processing the control data stored in said plurality of low priority sub queues in order of higher priority level, when the control data are to be acquired from said plurality of low priority sub queues.

11. (canceled)

12. A computer-readable recording medium in which a computer-executable program code is stored to attain a network protocol processing method which is implemented on a computer connected with a counter-side host, said network protocol processing method comprises:

performing protocol processing of reception protocol processing and transmission protocol processing, in which variables of the protocol processing used as control data for each of TCP transmission processing and TCP reception processing based on TCP (Transmission Control Protocol) protocol depend on each other;

performing the reception protocol processing on reception packets which have been arrived from said counter-side host, storing in a first queue section, the control data, which is used in the TCP transmission processing, of the control data updated through the reception protocol processing, and providing TCP data re-configured through the reception protocol processing to an application side;

performing the transmission protocol processing on transmission data for which a transmission request is issued from said application side, storing in a second queue section, the control data, which is used in the TCP reception processing, of the control data updated through the transmission protocol processing, and sending the TCP packet generated through the transmission protocol processing to said counter-side host;

monitoring said first queue, and acquiring the control data from said first queue section to update the variables of the TCP transmission processing, when the control data is stored in said first queue section; and

monitoring said second queue, and acquiring the control data from said second queue section to update the variables of the TCP reception processing when the control data is stored in said second queue section.

13. The computer-readable recording medium according to claim 12, in which the program is stored for making the computer further execute:

selecting one of a plurality of pairs of a queue of said first queue section and a queue of said second queue section, based on a kind of the control data used in either of said TCP reception processing or said TCP transmission processing.

14. The computer-readable recording medium according to claim 12, wherein said network protocol processing method further comprises:

storing the control data having a first kind related to session establishment and session disconnection of each of network sessions and sent from either of said TCP reception processing or said TCP transmission processing, in a high priority queue which comprises a pair of a queue of said first queue section and a queue of said second queue section, and the control data of a second kind other than the first kind sent in either of said TCP reception processing or said TCP transmission processing in a low priority queue which comprises a pair of another queue of said first queue section and another queue of said second queue section; and

processing the control data stored in said high priority queue more preferentially than the control data stored in said low priority queue, when the control data are to be acquired from said high priority queue and said low priority queue.

15. The computer-readable recording medium according to claim 12, wherein said network protocol processing method further comprises:

holding data of the priority levels corresponding to network sessions;

storing the control data having a first kind associated with session establishment and the session disconnection of each of network sessions and used in said TCP reception processing or said TCP transmission processing in a high priority queue which comprises a pair of a queue of said first queue section and a queue of said second queue section;

acquiring the data of the priority level corresponding to one of said network sessions, from the held data of the priority levels corresponding to said network sessions, based on data of said network session sent in said TCP reception processing or said TCP transmission processing;

storing the control data of a second kind different from the first kind in one low priority sub queue related to the acquired priority level, of said plurality of low priority sub queues, each of which comprises a pair of a sub queue of said first queue section and a sub queue of said second queue section, the pairs assigned with the priority levels;

processing the control data of the first kind stored in said high priority queue more preferentially than the control data stored in said plurality of low priority sub queues, and

processing the control data stored in said plurality of low priority sub queues in order of higher priority level, when the control data are to be acquired from said plurality of low priority sub queues.

16. (canceled)