CN107770819B - Rate control method for connectionless Wi-Fi network - Google Patents

Rate control method for connectionless Wi-Fi network Download PDF

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Publication number
CN107770819B
CN107770819B CN201711043979.0A CN201711043979A CN107770819B CN 107770819 B CN107770819 B CN 107770819B CN 201711043979 A CN201711043979 A CN 201711043979A CN 107770819 B CN107770819 B CN 107770819B
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master station
network
connectionless
rate
rate set
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CN107770819A (en
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齐曰霞
姜江建
夏晓天
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Espressif Systems Shanghai Co Ltd
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Espressif Systems Shanghai Co Ltd
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Abstract

The invention provides a rate control method for a connectionless Wi-Fi network, wherein each master station device in the connectionless Wi-Fi network records MAC addresses of other master station devices and rate set information supported by the other master station devices, a mutual communication relation is established between the two master station devices with the MAC addresses of the other master station devices and the supported rate set information, and the two master station devices establishing the mutual communication relation dynamically adjust sending rates from the rates supported by both sides to carry out data transmission. The invention realizes the speed regulation between the master station equipment in the connectionless Wi-Fi network, has simple realization mode and is beneficial to the network expansion.

Description

Rate control method for connectionless Wi-Fi network
Technical Field
The invention relates to a rate control method for a connectionless Wi-Fi network.
Background
Wi-Fi networks can be divided into connected and unconnected networks. The Wi-Fi network with connection comprises a main station (station) and Access Points (APs), the simplest Wifi network with connection comprises one AP and a certain number of stations connected to the AP, or more complex, the most simple Wifi network with connection comprises a plurality of APs, the APs are connected with each other, other station devices in the network are connected to the APs, so the Wi-Fi network with connection is called, and the size of the Wi-Fi network with connection depends on the capacity of the APs and the number of the APs. The Wi-Fi network without connection only has a master station (station) device, and the network does not need an AP because of no connection, so that the cost is saved, the size is conveniently expanded, and the network can be infinite.
The AP and the station negotiate a rate set supported by both sides in the connection process of the Wi-Fi network with connection, and the communication rate is adjusted according to the actual network environment. However, this method is not applicable at all in connectionless Wi-Fi networks, where a master station (station) device has no way to connect.
Disclosure of Invention
The invention provides a rate control method for a connectionless Wi-Fi network, which realizes rate adjustment between master station equipment in the connectionless Wi-Fi network, is simple in realization mode and is beneficial to network expansion.
In order to achieve the above object, the present invention provides a rate control method for a connectionless Wi-Fi network, where each master station device in the connectionless Wi-Fi network records MAC addresses of other master station devices and rate set information supported by the other master station devices, and two master station devices having MAC addresses of the other master station device and the supported rate set information dynamically adjust a sending rate from the rate set supported by both the master station devices to perform data transmission.
And the master station equipment in the connectionless Wi-Fi network records the MAC addresses of other master station equipment and the rate set information supported by other master station equipment by adopting a routing table.
The method for the new master station device to join the connectionless Wi-Fi network for the first time comprises the following steps:
broadcasting the supported rate set of the newly added master station device to the air at the basic rate;
after receiving the rate set sent by the newly added master station device, other master station devices in the connectionless Wi-Fi network send the rate set supported by the master station devices to the newly added master station device in a unicast mode, and simultaneously record the MAC address of the newly added master station device and the supported rate set;
and after receiving the rate sets sent by other master station equipment in the connectionless Wi-Fi network, the newly added master station equipment respectively records the MAC addresses and the supported rate sets of the other master station equipment.
The method for updating the self rate set by any master station equipment in the connectionless Wi-Fi network comprises the following steps:
the master station equipment with the changed own rate set broadcasts the own new rate set to the air at a basic rate;
and after receiving the new rate set, other master station equipment in the connectionless Wi-Fi network updates the rate set corresponding to the master station equipment with the changed rate set.
The sending rate between the two main station devices is positively correlated with the success rate of packet sending.
The invention realizes the speed regulation between the master station equipment in the connectionless Wi-Fi network, has simple realization mode and is beneficial to the network expansion.
Drawings
Fig. 1 is a schematic diagram of a master device when first joining a connectionless Wi-Fi network.
Figure 2 is a schematic diagram of any master device within a connectionless Wi-Fi network as its own rate set changes.
Detailed Description
The preferred embodiment of the present invention will be described in detail below with reference to fig. 1 and 2.
The invention provides a rate control method for a connectionless Wi-Fi network, wherein each master station (station) device in the connectionless Wi-Fi network records MAC addresses of other master station devices and rate sets supported by the master station devices, and after both the master station devices mutually own the MAC addresses and the rate sets of the other master station devices, mutual communication can be carried out. In the subsequent data communication, the two master station devices can dynamically adjust the sending rate from the rate supported by both sides according to the quality of the network environment so as to ensure that the data can be successfully sent to the other side.
The two master station devices adjust the sending rate according to factors such as the surrounding environment, the success rate of the sending packet and the like, if the success rate of the sending packet is higher, the sending rate can be properly improved, the high rate supported by both the master station devices is selected for communication, if the success rate of the sending packet is reduced, the sending rate can be properly reduced, and the low rate supported by both the master station devices is selected for communication.
When any master station device joins in a connectionless Wi-Fi network for the first time, firstly, a supported rate set is broadcasted to the air at a basic rate (in this embodiment, the basic rate is 1 Mbps), after other master station devices in the connectionless Wi-Fi network receive the rate set sent by the newly joined master station device, the supported rate set is sent to the newly joined master station device in a unicast manner, a routing table is created, a MAC address and a supported rate set of the newly joined master station device are recorded, and after the newly joined master station device receives the rate set sent by other master station devices in the connectionless Wi-Fi network, a plurality of routing tables are also created, and MAC addresses and supported rate sets of other master station devices are recorded respectively. When the newly added master station device and other master station devices in the connectionless Wi-Fi network mutually own the MAC address and the rate set of the other master station device, mutual communication can be carried out.
As shown in fig. 1, the dashed double-headed arrows in the figure represent no substantial connection between the devices. The A device wants to join the connectionless Wi-Fi network to communicate with other devices in the network, and firstly sends a broadcast packet with self-supported rate set information to the air at the basic rate of 1 Mbps. The device B receives the broadcast packet, sends the rate set information of the device B to the device A in a unicast mode, and records the MAC address of the device A and the rate set information supported by the device A. And after receiving the reply of the B device, the A device also records the MAC address of the B device and the rate set information supported by the B device. So far, the device A and the device B have the information of the other party and can communicate with each other.
The device C is also in the signal coverage range of the device A, the behaviors of the device C and the device B are the same, and the device A and the device C mutually possess the information of the other party and can mutually communicate.
When the own rate set of any master station device in the connectionless Wi-Fi network changes, the master station device broadcasts its own new rate set to the air at the basic rate (in this embodiment, the basic rate is 1 Mbps), and after receiving the new rate set, other master station devices in the connectionless Wi-Fi network update the rate set in the corresponding routing table.
As shown in fig. 2, the rate set of the device a changes, the device a broadcasts its new rate set, and the device B and the device C update the routing table storing the MAC address and the rate set information of the device a, and update the rate set in the routing table to the rate set newly broadcast by the device a. After updating, the device A and the device B, and the device A and the device C can communicate at the rate supported by both sides.
In the connectionless Wi-Fi network, each master station device records the MAC addresses of other master station devices and the rate sets supported by the master station devices, and in the subsequent data communication, the two master station devices can dynamically adjust the sending rate from the rate sets supported by both sides according to the quality of the network environment so as to ensure that data can be successfully sent to the other side.
The invention realizes the speed regulation between the master station equipment in the connectionless Wi-Fi network, has simple realization mode and is beneficial to the network expansion.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.

Claims (4)

1. A rate control method for a connectionless Wi-Fi network is characterized in that each master station device in the connectionless Wi-Fi network records MAC addresses of a plurality of other master station devices and rate set information supported by the other master station devices, and two master station devices having MAC addresses of the other side and the supported rate set information select a sending rate from the rate set supported by both sides for data transmission;
broadcasting a rate set supported by the master station equipment to be joined when the master station equipment to be joined joins the connectionless Wi-Fi network;
the master station equipment to be joined also comprises the following steps when joining the connectionless Wi-Fi network:
after receiving the rate set sent by the master station equipment to be joined, other master station equipment in the connectionless Wi-Fi network sends the rate set supported by the master station equipment to be joined in a unicast mode, and simultaneously records the MAC address of the master station equipment to be joined and the supported rate set;
after receiving the rate sets sent by other master station devices in the connectionless Wi-Fi network, the master station device to be joined records the MAC addresses and the supported rate sets of the other master station devices respectively.
2. The rate control method for a connectionless Wi-Fi network as claimed in claim 1, wherein a master device in the connectionless Wi-Fi network records MAC addresses of a plurality of other master devices and rate set information supported by the plurality of other master devices using a routing table.
3. The rate control method for a connectionless Wi-Fi network of claim 1, wherein the method for any master device within the connectionless Wi-Fi network to update its own rate set comprises the steps of:
the master station equipment with the changed own rate set broadcasts the own new rate set to the air at a basic rate;
and after receiving the new rate set, other master station equipment in the connectionless Wi-Fi network updates the rate set corresponding to the master station equipment with the changed rate set.
4. The rate control method for a connectionless Wi-Fi network as claimed in claim 1, wherein the transmission rate between the two master devices has a positive correlation with the success rate of packet transmission.
CN201711043979.0A 2017-10-31 2017-10-31 Rate control method for connectionless Wi-Fi network Active CN107770819B (en)

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Publication number Priority date Publication date Assignee Title
SE0303584D0 (en) * 2003-12-30 2003-12-30 Ericsson Telefon Ab L M Method and arrangement in wireless ad hoc or multihop networks
CN101567754B (en) * 2009-06-04 2012-09-19 上海交通大学 Speed self-adaption method based on wireless Mesh network
CN102131248B (en) * 2010-01-19 2013-12-04 华为技术有限公司 Rate negotiation method, data transmission system and related equipment
US10187824B2 (en) * 2014-05-30 2019-01-22 Apple Inc. Device and method for reliable WiFi data connectivity
CN107124248B (en) * 2017-03-20 2019-11-15 天地融科技股份有限公司 A kind of communication means, apparatus and system

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