CN115333574A

CN115333574A - Solution method for preventing partial nodes from accessing network in HPLC-based tree network

Info

Publication number: CN115333574A
Application number: CN202210907916.XA
Authority: CN
Inventors: 吴俊强; 赵勇; 刘永琪
Original assignee: Qingdao Lianzhongxin Cloud Technology Co ltd
Current assignee: Qingdao Lianzhongxin Cloud Technology Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-11-11

Abstract

The invention provides a solution method for preventing partial nodes in a tree network from accessing a network based on HPLC, which specifically comprises the following steps: s1: automatically adjusting the transmitting power of an on-line STA in the HPLC tree network; s2: an automatic adjusting program of the transmission power of the non-network-connected STA in the HPLC tree network; and S3, HPLC tree network. By adopting the technical scheme of the invention, the on-site operation and maintenance workload can be greatly reduced by using a mode of automatically adjusting the sending power; by using the mode of automatically adjusting the transmission power, the networking time consumption of each on-site area can be reduced and the network stability can be improved.

Description

Solution method for preventing partial nodes from accessing network in HPLC-based tree network

Technical Field

The invention relates to the technical field of HPLC (high performance liquid chromatography) networks, in particular to a solution method for preventing partial nodes from accessing a network in an HPLC-based tree network.

Background

At present, the HPLC network is applied to different application scenes such as a mining network and a low-voltage power distribution network, and when a long buried cable exists in an actual field application scene, STA at the far end of the buried cable cannot enter the network due to carrier signal attenuation.

When the carrier signal is transmitted on a long buried cable, a certain degree of attenuation is generated, when the attenuation of the carrier signal reaches a certain value, the intensity of the carrier signal received by an STA (station) at the far end of the buried cable is reduced until correct carrier data cannot be analyzed, and when the buried cable is in a humidity environment, the attenuation of the carrier signal is greater than that in a dry environment, so that the attenuation influence on the transmission of the carrier signal is greater, and the attenuation of the carrier signal is bidirectional on the buried cable. When the situation described above occurs in an actual field, the problem of network access of the STA which cannot be accessed to the network is solved by increasing the transmission power of all STAs in the network and the transmission power of STAs which are not accessed to the network, which requires human intervention, and is long in operation time and low in efficiency, as fig. 1 and 2 show a station network schematic diagram with a long buried cable, the buried cable 3# in fig. 1 and the buried cable 6# in fig. 2 are both long buried cables, the STA in the building 3# in fig. 1 and the STA in the building 6# in fig. 2 receive the carrier message in the network with poor effect, and similarly, the signals of the STA in the building 3# and the building 6# transmitted by the STA in the building 6# to reach the building CCO1 and the building 5# are also poor, which inevitably results in that the STA in the building 3# and the building 6# cannot be accessed to the network.

Fig. 1 shows a situation that a long buried cable is directly connected from a transformer (CCO 1) to a power supply building, and in such a wiring connection, an STA in a 3# building needs to directly perform carrier communication with the CCO to be able to access a network, and at this time, a method of increasing transmission power of the CCO and increasing transmission power of STAs in the 3# building can be adopted to solve a problem that the STA in the 3# building cannot access the network. In this case, field adjustment is difficult, transmission power of all non-networked STAs in CCO1 and 3# buildings needs to be adjusted, manual adjustment efficiency is low, and operation difficulty is high.

Fig. 2 shows that a long buried cable is connected from a 5# building to a 6# building, and an STA of the 6# building needs to join an HPLC tree network through the STA of the 5# building, and at this time, a method of increasing the transmission power of the STA of the 5# building and the STA of the 6# building can be adopted to solve the problem that the STA of the 6# building cannot enter the network, but the field operation in this case is more difficult because the number of STAs of which the transmission power needs to be adjusted in the field is uncertain, and it is difficult to position the STA in the field.

Disclosure of Invention

The situations described above cannot well and automatically solve the field problem, and in order to make up for the defects of the prior art, the invention provides a solution that part of nodes in a HPLC tree network cannot access the network.

The invention is realized by the following technical scheme: a solution method for preventing partial nodes from accessing a network in an HPLC-based tree network specifically comprises the following steps:

s1: the procedure of automatic adjustment of transmission power of network STA in HPLC tree network is shown in fig. 4. Automatically adjusting the sending power of the downlink carrier message; after the HPLC tree network networking is finished, all nodes in the network judge that the nodes do not receive the association request message for 1 hour, beacon transmission in a high-power mode is started within five continuous routing period times, and if a new STA accesses the network successfully in the period, the PCO selected by the newly accessed STA keeps the transmission power unchanged, so that good data communication with the newly accessed STA is ensured; if no new STA enters the network during the period, the STA on the network adjusts the transmission power to a normal value;

s2: the flow of the automatic transmission power adjustment program for the non-networked STAs in the HPLC tree network is shown in fig. 5. Automatically adjusting the sending power of the uplink carrier message; after being electrified and received by the non-networked STA, the non-networked STA continues to transmit an association request message for 3 routing periods, but under the condition that the association confirmation message cannot be received, the non-networked STA needs to automatically increase the transmission power, and if the STA can be networked, the transmission power is kept unchanged; if the STA is refused to access the network, the STA sets the transmission power to a normal value;

s3, selecting an STA as an agent by the new network-accessing STA of the HPLC tree network, namely, the selected STA is changed into a PCO role, the PCO can receive an association request message sent by the new network-accessing STA and upload the association request message sent by the new network-accessing STA to the agent, and the association request message sent by the new network-accessing STA can be uploaded to the CCO by the circulation, the CCO confirms that the new network-accessing STA can be added into the network by judging, the CCO sends down an association confirmation message, the association confirmation message is issued to the new network-accessing STA by the PCO selected by the new network-accessing STA, and the new network-accessing STA successfully accesses the network after receiving the association confirmation message; once the PCO selected by the newly-accessed STA judges that the association request and the association confirmation message are specific to the newly-accessed STA, the PCO sets a transmission mode of keeping high power per se and ensures that the PCO and the newly-accessed STA carry out good communication.

As a preferred scheme, the downlink in step S1 is a message sent to the STA by the CCO.

As a preferred scheme, the uplink in step S2 is a message sent by the STA to the CCO.

Preferably, step S1 is synchronized in time with step S2.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects: 1. the mode of automatically adjusting the transmission power can greatly reduce the workload of on-site operation and maintenance; 2. by using the mode of automatically adjusting the transmission power, the networking time consumption of each on-site area can be reduced and the network stability can be improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of a network of stations with longer buried cables 1;

FIG. 2 is a schematic diagram of a grid network with longer buried cables;

FIG. 3 is a schematic diagram of a new network-accessing STA of the HPLC tree network;

fig. 4 is a processing flow of an on-line STA transmission power automatic adjustment program in an HPLC tree network;

fig. 5 is a processing flow of an automatic adjustment procedure for transmission power of an STA that does not enter the network in the HPLC tree network.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

A solution method for preventing partial nodes from accessing the network in the HPLC tree network according to the embodiment of the present invention is specifically described below with reference to fig. 3 to 5.

The invention provides a solution method for preventing partial nodes in a HPLC-based tree network from accessing a network, which specifically comprises the following steps:

s1: the procedure of automatic adjustment of transmission power of network STA in HPLC tree network is shown in fig. 4. Automatically adjusting the sending power of a downlink carrier message, wherein the downlink is a message sent to the STA by the CCO; after the networking of the HPLC tree network is finished, all nodes in the network judge that the nodes do not receive the association request message for 1 hour, beacon transmission in a high-power mode is started within five continuous routing period times, and if a new STA successfully accesses the network during the period, a PCO selected by the newly accessed STA keeps the transmission power unchanged, so that good data communication with the newly accessed STA is ensured; if no new STA enters the network during the period, the STA on the network adjusts the transmission power to a normal value;

s2: the programming flow of automatic adjustment of transmission power of non-networked STAs in the HPLC tree network is shown in fig. 5. Automatically adjusting the sending power of an uplink carrier message, wherein the uplink is a message sent to a CCO by an STA (station); after receiving the network address, the STA which does not access the network is powered on, and continues to send the association request message for 3 routing periods, but under the condition that the association confirmation message is still not received, the STA which does not access the network needs to automatically increase the sending power, and if the STA can access the network, the sending power is kept unchanged; if the STA is refused to access the network, the STA sets the transmission power to a normal value;

step S1 is synchronized in time with step S2 to ensure that the uplink and downlink transmission power match in the HPLC network.

After the above operation procedure, the STA which is not connected to the network due to the long buried cable can be successfully connected to the network.

S3, a schematic diagram of the HPLC tree network is shown in FIG. 3. The new network-accessing STA selects an STA as an agent, namely the selected STA is changed into a role of the PCO, the PCO can receive an association request message sent by the new network-accessing STA and uploads the association request message sent by the new network-accessing STA to the agent of the new network-accessing STA, and the association request message sent by the new network-accessing STA can be uploaded to the CCO in such a circulating way, the CCO confirms that the new network-accessing STA can be added into the network by judging, and then the CCO sends down an association confirmation message which is issued to the new network-accessing STA by the PCO selected by the new network-accessing STA, and the new network-accessing STA successfully accesses the network after receiving the association confirmation message; once the PCO selected by the STA newly accessed to the network judges that the association request and the association confirmation message are specific to the STA newly accessed to the network, the PCO sets a transmission mode for keeping high power per se and ensures that the PCO and the STA newly accessed to the network can well communicate.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A solution method for preventing partial nodes from accessing a network in an HPLC-based tree network is characterized by comprising the following steps:

s1: automatically adjusting the sending power of the downlink carrier message; after the networking of the HPLC tree network is finished, all nodes in the network judge that the nodes do not receive the association request message for 1 hour, beacon transmission in a high-power mode is started within five continuous routing period times, and if a new STA successfully accesses the network during the period, a PCO selected by the newly accessed STA keeps the transmission power unchanged, so that good data communication with the newly accessed STA is ensured; if no new STA enters the network during the period, the STA on the network adjusts the transmission power to a normal value;

s2: automatically adjusting the sending power of the uplink carrier message; after receiving the network address, the STA which does not access the network is powered on, and continues to send the association request message for 3 routing periods, but under the condition that the association confirmation message is still not received, the STA which does not access the network needs to automatically increase the sending power, and if the STA can access the network, the sending power is kept unchanged; if the STA is refused to access the network, the STA sets the transmission power to a normal value;

s3, HPLC tree network: the new network access STA selects an STA as an agent, namely the selected STA is changed into a PCO role, the PCO can receive an association request message sent by the new network access STA and uploads the association request message sent by the new network access STA to the agent, and the association request message sent by the new network access STA can be uploaded to the CCO; once the PCO selected by the STA newly accessed to the network judges that the association request and the association confirmation message are specific to the STA newly accessed to the network, the PCO sets a transmission mode for keeping high power per se and ensures that the PCO and the STA newly accessed to the network can well communicate.

2. The method as claimed in claim 1, wherein the downlink in step S1 is a packet sent to the STA by the CCO.

3. The solution according to claim 1, wherein the uplink in step S2 is a message sent by the STA to the CCO.

4. The solution of claim 1, wherein the steps S1 and S2 are synchronized in time.