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A Method for Flexible Mapping of 802.11 QoS Priority Values ​​in Chip

A priority value and priority technology, applied in digital transmission systems, data exchange networks, network topologies, etc., can solve problems such as different traffic encoding rules

Active Publication Date: 2018-10-09
SUZHOU CENTEC COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the QoS UP field in the 802.11 packet header and the COS field in the Ethernet packet header are both 3 bits, their specific traffic encoding rules are completely different, and there is no obvious linear correspondence

Method used

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  • A Method for Flexible Mapping of 802.11 QoS Priority Values ​​in Chip
  • A Method for Flexible Mapping of 802.11 QoS Priority Values ​​in Chip
  • A Method for Flexible Mapping of 802.11 QoS Priority Values ​​in Chip

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Embodiment Construction

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0025] A method for realizing flexible mapping of 802.11 QoS priority values ​​in a chip disclosed by the present invention is implemented in a packet forwarding chip, which can allow messages to be forwarded after adding and decomposing CAPWAP encapsulation and mutual conversion between 802.3 and 802.11 formats. Map QoS priority.

[0026] Specifically, combined with figure 1 and image 3 As shown, the packet forwarding chip includes an inbound processing engine (IPE), a store and forward module (BSR), an outbound processing engine (EPE), and a WLAN processing engine (WLAN Engine). The following describes how packets support flexible mapping of QoS priorities in the CAPWAP decapsulation direction and encapsulation direction.

[0027] In the direction of CAPWAP packet decapsulation:...

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Abstract

The invention discloses a method for flexible mapping of 802.11 QoS priority values ​​in a chip. While decapsulating packets and converting 802.11 to 802.3 formats, the 802.11 QoS UP value parsed by the chip is combined with the service ID to check the first Look up the table to get the corresponding priority, and then check the second lookup table according to the priority combined with the service ID to get the corresponding COS value / DSCP value, and finally loop back the decapsulated message to the IPE for forwarding processing; otherwise, in In the direction of message encapsulation, after the message enters the chip, the 802.11 QoS UP value is obtained according to the content in the editing action, and the message is converted from 802.3 to 802.11 format according to the obtained 802.11 QoS UP value, and then encapsulated to obtain the encapsulation Finally, the encapsulated message is looped back to the chip IPE for outer IP forwarding. The invention realizes that the message is forwarded after adding and decapsulating CAPWAP encapsulation and mutual conversion between 802.3 and 802.11 formats, and at the same time supports flexible mapping of QoS priority.

Description

technical field [0001] The invention relates to a QoS priority value mapping technology, in particular to a method for realizing flexible mapping of 802.11 QoS priority values ​​in a chip. Background technique [0002] Under the "AC-thin AP" wireless architecture, the wireless controller (AC) and the wireless access point (AP) pass the CAPWAP (Control And Provisioning of Wireless Access Points Protocol Specification, wireless access point control and configuration protocol) protocol to communicate. The wireless data frame is encapsulated in the CAPWAP tunnel and sent to the AC as it is or after conversion from 802.11 to 802.3 format. CAPWAP messages can be encrypted using DTLS. [0003] If the inner layer packet is a packet in 802.11 format, the QoS UP (User Priority field in the QoS Control field of the 802.11 packet header) value in the 802.11 packet header needs to be mapped to the wired side packet COS (field in the Ethernet header) / DSCP (field in the IP header) to su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/857H04L12/911H04W28/24H04W84/12H04L47/2491
CPCH04L47/2491H04L47/825H04W28/24H04W84/12
Inventor 龚海东
Owner SUZHOU CENTEC COMM CO LTD