Packets filtering method in a wireless network system

• US 20040062243A1
• Filed: 10/01/2002
• Published: 04/01/2004
• Est. Priority Date: 10/01/2002
• Status: Active Grant

• Current Assignee: Inventec Appliances, Inventec Appliances Corporation (Inventec Corporation)
• Original Assignee: Inventec Appliances Corporation (Inventec Corporation)
• Inventors: Tsai, Shih-Kuang, Zhang, Yong, Ho, Dai-Shui
• Granted Patent: US 7,151,765 B2
• Time in Patent Office: Days
• US Class Current: 370/392
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 63/0236 Filtering by address, protocol, port number or service, e.g. IP-address or URL
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Packets filtering method in a wireless network system. The method includes following steps: using a first node of the wireless network system to transmit a packet to a switch of the wireless network system, using a receiving module of the switch to receive the packet, using an identifying module of the switch to sequentially compare an address information of the packet with a plurality of address data of an address list, and using a transmitting module of the switch to transmit the packet to a second node via a local area network if the address information of the packet corresponds to one of the address data of the address list.

Claims

1. A method for filtering packets in a wireless network system, the wireless network system comprising a wireless access point wirelessly communicating with a plurality of first nodes, each of the first nodes delivering data to the access point by transmitting packets, each of the packets having a header for recording a first address code, the access point comprising a first list for storing a plurality of first addresses, a receiving module for receiving the packets transmitted from the first nodes, an identifying module for comparing the first address codes of the packets received from the receiving module with the first addresses of the first list, and a transmitting module for delivering data to a plurality of second nodes via a local area network, the method comprising:

(a) utilizing one of the first nodes to transmit a first packet to the access point;

(b)utilizing the receiving module to receive the first packet transmitted from the first node;

(c) utilizing the identifying module to compare the first address code of the first packet with the first addresses of the first list; and

(d) utilizing the transmitting module to transmit the first packet to one of the second nodes if the first address code of the first packet corresponds to one of the first addresses of the first list.

2. The method of claim 1 wherein the first address code recorded in the header of each packet is used to indicate which first node transmits the packet.

3. The method of claim 2 wherein the header of each packet further records a second address code for indicating where the packet should be transmitted, and the access point further comprises a second list for storing a plurality of second addresses, the identifying module compares the second address code of the first packet with the second addresses of the second list in the step (c), and the transmitting module transmits the first packet to one of the second nodes in the step (d) if the first address code of the first packet corresponds to one of the first addresses of the first list and if the second address code of the first packet corresponds to one of the second addresses of the second list.

4. The method of claim 1 wherein the first address code recorded in the header of each packet is used to indicate where the packet should be transmitted.

5. The method of claim 1 wherein the access point is positioned in a medium access control (MAC) layer of the wireless network system.

6. The method of claim 1 wherein the first nodes and the second nodes are positioned in a physical layer of the wireless network system.