CN107483224B - Wireless routing version upgrading method based on DR election - Google Patents
Wireless routing version upgrading method based on DR election Download PDFInfo
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- CN107483224B CN107483224B CN201710344370.0A CN201710344370A CN107483224B CN 107483224 B CN107483224 B CN 107483224B CN 201710344370 A CN201710344370 A CN 201710344370A CN 107483224 B CN107483224 B CN 107483224B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
- H04L41/082—Configuration setting characterised by the conditions triggering a change of settings the condition being updates or upgrades of network functionality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/084—Configuration by using pre-existing information, e.g. using templates or copying from other elements
- H04L41/0846—Configuration by using pre-existing information, e.g. using templates or copying from other elements based on copy from other elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/085—Retrieval of network configuration; Tracking network configuration history
- H04L41/0853—Retrieval of network configuration; Tracking network configuration history by actively collecting configuration information or by backing up configuration information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/30—Decision processes by autonomous network management units using voting and bidding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
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Abstract
The invention discloses a wireless routing version upgrading method based on DR election, which downloads an update file through DR generated by election in a conflict domain and transmits the update file to other equipment to be upgraded in the conflict domain. According to the scheme, the batch upgrading of the APs in the local area network can be realized within a fixed time, the bandwidth resources of the local area network are effectively utilized, and the bandwidth pressure of the cloud server is reduced.
Description
Technical Field
The invention relates to a wireless communication technology, in particular to a version upgrading technology of a wireless communication device.
Background
The version upgrading of the BDCOM wireless AP router at present is to judge whether a new version needs to be downloaded or not by requesting a cloud server through http, and each AP device needs to request the cloud server to download an update file when upgrading. And the bandwidth capacity of the cloud server determines the upgrading scale of the AP at the same time.
Therefore, the existing version upgrading scheme of the wireless AP router cannot upgrade the APs in the local area network in batch within a fixed time in view of the bandwidth capacity of the cloud server within the same time.
Disclosure of Invention
The noun explains:
DR-Designated Router, assigning a Router;
a drop-DR other, non-designated router;
AP-Access Point, Access node, referred to herein as a Wireless Router;
a Hello-Hello packet for discovering neighbors in a collision domain;
a Seen DR-Seen DR Hello packet receives a Hello message sent by a DR;
DR gone-designated router aging loss;
DelayTimer-delay timer;
WaitTimer-wait timer;
DOWN-off state;
INIT-initialization state;
WAIT-WAIT timeout state.
Aiming at the problems of the existing wireless routing version upgrading technology, a version upgrading scheme capable of realizing batch upgrading is needed.
Therefore, the technical problem to be solved by the present invention is to provide a wireless routing version upgrading method based on DR election.
In order to solve the technical problem, the wireless routing version upgrading method based on DR election provided by the invention downloads the update file through DR generated by election in a conflict domain, and transmits the update file to other devices to be upgraded in the conflict domain.
In the scheme, a group of wireless routes which belong to the same conflict domain and have the same value of the update file MD5 is used as an upgrading subdomain, and wireless route version upgrading is carried out in each upgrading subdomain respectively based on DR election.
In the scheme, the updating file is transmitted by adopting a TCP protocol.
In the scheme, the MD5 file consistency verification is carried out before the wireless routing equipment is updated.
In the scheme, DR is elected and generated based on a random serial number value generated after each device is powered on and started.
In the scheme, the device with the largest random serial number value is elected as DR.
In the scheme, the DR election strategy is as follows: device priority > device random sequence number value > device Wan port IP address.
In the scheme, the DR election process is as follows:
(1) the method comprises the steps that after the wireless routing equipment is started, the initial state is a DOWN state, a random sequence number seq is generated at the same time, and version information is requested from a cloud server at regular time;
(2) after receiving the response of the cloud server, the wireless routing equipment enters an INIT state and starts a DelayTimer at the same time;
(3) entering a WAIT state after the DelayTimer is overtime, and starting a WAIT timer in the state;
(4) and D, performing DR election after the WaitTimer is overtime, and enabling the selected device to become the drop.
In the scheme, when the WAIT timer is started in the WAIT state, the helloter timer is started to periodically send the multicast Hello message outwards.
In the scheme, after DR election, the equipment in the INIT state automatically becomes the Dry after receiving the Hello message sent by DR.
In the scheme, if the router does not receive the DR message in the preset Hello period, the aged DR is deleted, and then the router enters the WAIT state again to perform the next round of DR election.
Based on the scheme provided by the invention, batch upgrading of the APs in the local area network can be realized within a fixed time, the bandwidth resources of the local area network are effectively utilized, and the bandwidth pressure of the cloud server is reduced.
In the scheme, the local area network update files are transmitted by adopting a TCP protocol, and the MD5 file consistency verification is adopted before the equipment is updated, so that the whole upgrade cannot be down.
Drawings
The invention is further described below in conjunction with the appended drawings and the detailed description.
FIG. 1 is a diagram illustrating an upgrade system state in an embodiment of the present invention;
fig. 2 is a schematic diagram of distribution of version files in the embodiment of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
In the scheme of the embodiment, a download scheme based on DR election is provided on a wireless platform of BDCOM, and then a wireless device version upgrading scheme for transmitting version files (namely updating files) to other APs in the conflict domain through DR is provided. According to the scheme, the AP in the same conflict domain only needs to download the file (such as an updated file) once, and then the file is transmitted through the inside of the local area network, so that the bandwidth pressure of the cloud server can be effectively reduced, and the problem that a large number of APs are upgraded in a fixed time can be solved.
The following describes the specific implementation of the embodiment.
DR election.
DR is an important role in AP version upgrading, and the scheme downloads the update files to the cloud server through DR and transmits the update files to other servers.
In the scheme, DR is elected and generated mainly based on a random serial number value generated after each device is powered on and started.
Each AP device generates a random sequence number seq after being powered on and started, and in the present embodiment, the AP device with the largest seq value is used as the DR. The random seq value is adopted to elect to generate DR, each device is possible to elect to become DR, and the possibility of DR role transformation is also ensured after DR fails.
On the basis, aiming at some occasions needing to appoint a certain device to become a permanent DR, the scheme of the embodiment further increases the device priority value, wherein the device priority value is manually set, and the priority value is higher than the random serial number. Priority based on device priority value being higher than random sequence number value may be preferred as DR.
In this case, the election policy for DR in this example scheme is: device priority (to be set manually) > device random sequence number > device Wan port IP address.
2. Isolation is performed between different devices within the collision domain.
If the AP update files in a conflict domain are the same, the version upgrade scheme based on DR election described above can be directly utilized, and the DR generated by election in the conflict domain downloads the version upgrade file to the cloud server, and then propagates the update file to other servers in the conflict domain.
If there are different types of AP devices in a conflict domain, their update files are not consistent, in which case the above version upgrading scheme based on DR election cannot be directly utilized.
Therefore, a sub-domain scheme is provided, different devices in the conflict domain are isolated, and the AP devices in the sub-domain are upgraded in batches through a version upgrading scheme based on DR election.
The sub-domain specifically belongs to the same conflict domain, and the update file MD5 has the same value as the set of AP devices.
In other words, in the scheme, a group of wireless paths which belong to the same conflict domain and have the same value of the update file MD5 is used as an upgrade sub-domain, and in each upgrade sub-domain, the AP devices in the sub-domain are upgraded in batch by using a version upgrade scheme based on DR election.
It follows that in the same conflict domain, DR is a concept of roles in sub-domains, and the number of sub-domains is equal to the number of DRs.
The file isolation problem between different devices in a conflict domain is effectively solved by setting the subdomains.
The following describes, by way of a specific example, an implementation process of version upgrade based on DR election in the present solution.
Referring to fig. 1 and fig. 2, a schematic diagram of the state of the BDCOM wireless platform AP upgrade system and a schematic diagram of the distribution of the version files in this example are shown. As can be seen from the figure, the whole AP version upgrading process is as follows:
(1) as shown in fig. 1, after the AP device is started, the initial state is DOWN, and a random sequence number seq is generated. And the device requests the latest version of the information of the cloud server through the Http protocol every 15 minutes.
(2) If the cloud server side is provided with version upgrading information, the corresponding AP equipment side receives an Http response, wherein the Http response comprises a version number of an upgrading file, an md5 value and a downloading link, at the moment, the AP equipment enters an INIT state, and meanwhile, a Delaytimer (the default timeout is 1000 seconds) is started, and a delay timer ensures that other APs in the time period can acquire the information of the latest version.
(3) And after the delay timer is overtime, the AP equipment enters a WAIT state, starts a WAIT timer for 60 seconds in the state, and simultaneously starts a Hello timer to send a multicast Hello message outwards in a period (the default period is 15 seconds). Because the time for each AP device to enter the INIT state is different, the state is converted into the WAIT after the AP in the INIT state receives the Hello message, and therefore all AP devices can perform DR election at the same time.
(4) And D, performing DR election after the WaitTimer is overtime, and enabling the selected AP equipment to become the drop. The election strategy is as follows: the device priority (manually set, default to 1) > the device random sequence number > the device Wan port IP address.
When a DR election is performed, a device with a high priority level becomes DR, if the priority levels match, a device with a high random number becomes DR, and if the priority levels match with the random number, a device with a high IP address becomes DR.
Once the DR is successfully elected, the DR is not easily changed any more, and the device in the INIT state automatically becomes the router after receiving the Hello message sent by the DR. Only if the DR equipment end is disconnected (such as network disconnection or equipment failure), the router does not receive DR messages in 4 Hello periods, the aged DR is deleted, and then the router enters the WAIT state again to perform the next round of DR election.
(5) Only the DR equipment terminal can download the version to the cloud server, and after the downloading is finished, the sign BIN _ OK bit is marked in the Hello message. After receiving the message with the BIN _ OK, the drop terminal requests the DR side for the version file in the random interval of [0-15] seconds. And after the request of the drop device end is finished, detecting the version consistency, and immediately carrying out version upgrading operation after the verification is passed. The DR end performs the version upgrade operation immediately after sending the version to all the router neighbors (as shown in fig. 2).
At this point, all AP devices in the subdomain have completed the version upgrade operation.
As can be seen from the above example, the DR election process goes through four states, DOWN- > INIT- > WAIT- > DR. All the APs in one sub-domain only need to download the update files once by DR, bandwidth resources in the local area network are reasonably utilized, bandwidth pressure of the cloud server is greatly reduced, and the overall update speed is accelerated. Meanwhile, the problem of file isolation among different devices in a conflict domain is effectively solved through a sub-domain.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The wireless routing version upgrading method based on DR election is characterized in that an update file is downloaded through DR generated by election in a conflict domain, and the update file is transmitted to other equipment to be upgraded in the conflict domain, so that an AP in the same conflict domain only needs to download the file once and then transmits the file through the inside of a local area network; the wireless routing version upgrading method comprises the following steps:
(1) after the AP equipment is started, the initial state is DOWN, a random sequence number seq is generated at the same time, and the equipment requests the information of the latest version of the cloud server through an Http protocol at intervals of preset time;
(2) if the cloud server side is provided with version upgrading information, the corresponding AP equipment side receives an Http response, wherein the Http response comprises a version number of an upgrading file, an md5 value and a downloading link, the AP equipment enters an INIT state at the moment, a Delaytimer is started at the same time, and a delay timer ensures that other APs in the time period can acquire the information of the latest version;
(3) the DelayTimer enters a WAIT state after being overtime, and the AP equipment starts a WAIT timer in the state and also starts a HellotTimer timer to periodically send a multicast Hello message outwards;
(4) performing DR election after the WaitTimer is overtime, and enabling the selected AP equipment to become a drop;
(5) only the DR equipment terminal can download the version to the cloud server, and after the downloading is finished, a sign BIN _ OK bit is marked in the Hello message; after receiving the message with the BIN _ OK, the Router end requests a DR side for a version file in a random interval; after the request of the drop device end is finished, detecting the version consistency, and immediately carrying out version upgrading operation after the verification is passed; and immediately carrying out version upgrading operation after the DR end sends the versions to all the Dry neighbors.
2. The method for upgrading wireless router version as claimed in claim 1, wherein a group of wireless routers belonging to the same conflict domain and having the same value of the update file MD5 is used as an upgrading sub-domain, and wireless router version upgrading is performed in each upgrading sub-domain based on DR election.
3. The wireless routing version upgrade method according to claim 1, wherein the update file is transmitted using a TCP protocol.
4. The wireless routing version upgrade method according to claim 1, wherein the MD5 file consistency verification is performed before the wireless routing device updates.
5. The wireless routing version upgrade method of claim 1, wherein the DR is elected to be generated based on a random sequence number value generated after each device is powered on.
6. The method of claim 5, wherein the policy of DR election is: device priority > device random sequence number value > device Wan port IP address.
7. The method according to claim 1, wherein when the Wait timeout state is entered and the Wait timer is started, a helloter timer is started to send a multicast Hello packet periodically.
8. The upgrading method of claim 7, wherein after the DR election, the device in initialization state automatically becomes the Dry after receiving the Hello message sent by the DR.
9. The method of claim 8, wherein if the message of DR is not received by the router within a predetermined Hello period, the aged DR is deleted, and then the router re-enters the waiting timeout state for the next round of DR election.
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| CN111245660B (en) * | 2020-02-24 | 2022-08-12 | 重庆金美通信有限责任公司 | Network-based equipment upgrading self-adaptive transmission method |
| CN113382065B (en) * | 2021-06-08 | 2023-04-07 | 京东方科技集团股份有限公司 | File downloading method, device, system, equipment and storage medium |
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