Method, apparatus and network system for controlling network congestion

摘要

The invention provides a method, an apparatus and a system for controlling network congestion. The method includes: sending a control frame or a beacon frame to a station in a network when network congestion occurs, so as to instruct the station to enlarge a contention window when the station needs to send data. The method can achieve the congestion control for a network before collision occurs to a station, avoiding more serious network congestion caused by each station still contending for a channel after the network congestion occurs; since an access point can send a control frame or a beacon frame to the station when determining that congestion occurs to the current network, to instruct the station which needs to send data to re-determine a backoff time, a rapidly congestion relief of the whole network is achieved, and also a fair channel contention of each station is guaranteed.

主权项

1. A method for controlling network congestion, comprising:
sending a control frame or a beacon frame to a station in a network when network congestion occurs, to enable the station to enlarge a contention window when the station needs to send data, wherein the control frame or the beacon frame comprises an instruction field which is used to instruct the station to enlarge the contention window when the station needs to send data; wherein the control frame or the beacon frame further comprises a window field with a value of hcw, and the value of hcw of the window field is used to instruct the station to enlarge the contention window to a product of hcw and CWmin, wherein the CWmin is a minimum value of the contention window, and the value of hcw of the window field is a multiple of the minimum value of the contention window.