CN114629518B - Dynamic ad hoc network method of digital interphone - Google Patents

Dynamic ad hoc network method of digital interphone Download PDF

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Publication number
CN114629518B
CN114629518B CN202210330166.4A CN202210330166A CN114629518B CN 114629518 B CN114629518 B CN 114629518B CN 202210330166 A CN202210330166 A CN 202210330166A CN 114629518 B CN114629518 B CN 114629518B
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message
time delay
level
receiving
network
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CN114629518A (en
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卢潇
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Xiamen Cheerzing Technology Co ltd
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Xiamen Cheerzing Technology Co ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827Portable transceivers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B17/00Monitoring; Testing
    • H04B17/30Monitoring; Testing of propagation channels
    • H04B17/309Measuring or estimating channel quality parameters
    • H04B17/318Received signal strength
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/18Self-organising networks, e.g. ad-hoc networks or sensor networks
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention discloses a dynamic ad hoc network method of a digital interphone, which marks network equipment as an Admin level, a Manager level and a device level, and comprises the following steps: a network access management flow of the equipment; an in-network management flow of the Device level Device; an on-line management flow of Manager level equipment and an on-line management flow of Admin level equipment; in the above flow, the hierarchy conversion is controlled according to the received signaling message and the receiving time, wherein the control parameters of the receiving time comprise receiving time delay and transmitting time delay, the transmitting time delay is related to the signal strength RSSI of the received message before transmitting, and the larger the RSSI is, the smaller the transmitting time delay is. The invention realizes the dynamic mesh networking of the equipment in the network access management and the network management, can greatly reduce the problem of air interface signal conflict in the public digital interphone mesh network, has strong network robustness due to the dynamic adjustment function, and can be applied to emergency communication.

Description

Dynamic ad hoc network method of digital interphone
Technical Field
The invention relates to the field of digital interphones, in particular to a dynamic ad hoc network method of a digital interphone.
Background
The public general interphone is popular among users because the public general interphone can be used without license plates of the national radio management committee, and the public general interphone is convenient and effective. The public interphone is divided into three types of analog interphones, digital interphones and public network interphones, wherein the digital interphones serving as upgrading and updating products of the public interphones have the advantages of low power consumption, high frequency spectrum utilization rate, small body and the like, and particularly, the digital interphones can be developed to have a mesh networking function and are more concerned. The mesh networking technology with low cost and high efficiency is a fast rising killer-level function.
The wireless network receiving and transmitting the same frequency has difficulty in processing the problem of air interface signal conflict, and particularly, the problem of air interface signal conflict is better processed in a mesh network, so that the robustness of the network can be ensured.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention aims to provide a low-cost, high-efficiency and dynamically-adjusted mesh networking technology, which can greatly reduce the problem of air interface signal collision in a public digital interphone mesh network, has strong network robustness due to the dynamic adjustment function, and can be applied to emergency communication.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a dynamic ad hoc networking method, labeled as Admin level, manager level, and device level, on a network device, comprising:
a network access management flow of the equipment;
an in-network management flow of the Device level Device;
the on-line management flow of Manager-level devices;
in the above flow, the hierarchy conversion is controlled according to the received signaling message and the receiving opportunity, wherein the control parameters of the receiving opportunity comprise two-stage receiving time delay and transmitting time delay, the transmitting time delay is the time delay before the network equipment transmits data, the transmitting time delay is related to the signal strength RSSI of the received message before transmission, and the larger the RSSI is, the smaller the transmitting time delay is.
Further, the transmission delay is expressed as a difference between an absolute value of the RSSI in dBm and a constant, and the transmission delay is in milliseconds.
Further, the network access management flow of the device includes:
sending a network access request message; after sending a network access request message, setting a first receiving time delay, and entering a receiving mode;
when receiving a network access request message during a first receiving time delay, saving a message sender ID, and marking the Device as a Device level;
setting a second receiving delay after the expiration of the first receiving delay when the network access request message is not received during the first receiving delay;
when receiving the network access request message during the second receiving time delay, saving the ID of the message sender, and marking the equipment as a Device level;
and when the network access request message is not received in the second receiving time delay period, marking the equipment as an Admin level after the second receiving time delay is expired, and transferring to the network management flow of the Admin level equipment.
Further, the in-network management flow of the Device level Device includes:
setting a heartbeat period, receiving a heartbeat message sent by the Admin equipment, and restarting a network access flow if the heartbeat message is not received in the heartbeat period;
when the received message is a network access request message, setting a fourth receiving time delay;
when the network access request message is received in the fourth receiving time delay period, stopping the fourth receiving time delay and returning to the receiving state;
when the network access request message is not received in the fourth receiving time delay period, setting a sending time delay after the fourth receiving time delay is expired;
when receiving the network access request message in the transmission delay period, ending the transmission delay and returning to the receiving state;
and when the network access request message is not received in the transmission time delay period, after the transmission time delay is expired, the network access request message is transmitted, the equipment is marked as a Manager level, and the in-network management flow of Manager level equipment is shifted.
Further, the in-network management flow of the Device level Device further includes:
when the received message is a shutdown message of a Manager level, comparing whether the message sender ID of the shutdown message is consistent with the stored message sender ID, and if so, re-executing the network access management flow by the equipment; if not, discarding the message.
Further, the in-network management flow of the Manager-level device includes:
periodically receiving a heartbeat message sent by the Admin equipment, and restarting a network access process if the heartbeat message is not received in the heartbeat period;
when the received message is a network access request message, setting a sending time delay;
when receiving the network access request message in the transmission delay period, ending the transmission delay and returning to the receiving state;
and when the network access request message is not received in the transmission time delay period, after the transmission time delay is expired, the network access request message is transmitted, the number of the lower-level devices of the device is increased by one, and then the receiving state is returned.
Further, the in-network management flow of the Manager level device further includes:
when the received message is a shutdown message of the Device level equipment, subtracting one from the number of subordinate equipment of the equipment; when the number of the lower-level devices of the Device is zero, the Device is marked as a Device level, and then the Device level Device is transferred to the in-network management flow.
Further, the in-network management flow of the Manager level device further includes:
when the received message is a shutdown message of the Admin level equipment, setting a sending time delay;
when receiving a network access request message with the ID of a message sender of-1 in the transmission time delay period, returning to a receiving state;
when the network access request message with the ID of the message sender of-1 is not received in the transmission time delay period, after the expiration of the transmission time delay, the network access request message with the ID of-1 is transmitted; and marking the equipment as an Admin level, and then transferring to an in-network management flow of the Admin level equipment.
Further, the in-network management flow of the Admin hierarchical device includes:
starting a heartbeat timer and periodically sending heartbeat messages;
when receiving messages sent by other layers of equipment in a heartbeat period, processing the messages;
and when the messages sent by the devices at other levels are not received in the heartbeat period, sending heartbeat messages, and restarting the heartbeat timer.
The invention realizes the following technical effects:
the embodiment of the invention divides the equipment layer into three stages, controls the layer conversion according to the received signaling message and the receiving time, realizes the equipment network access management and the dynamic mesh networking in the network management, can greatly reduce the problem of air interface signal conflict in the public digital interphone mesh network, has strong network robustness due to the dynamic adjustment function, and can be applied to emergency communication.
Drawings
FIG. 1 is a network access management flow of a Device and an in-network management flow of a Device level Device;
fig. 2 is an in-network management flow of Manager-level devices and Admin-level devices.
Detailed Description
For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention.
The invention will now be further described with reference to the drawings and detailed description.
As shown in fig. 1 and fig. 2, the present invention provides a dynamic ad hoc network method suitable for a digital interphone.
In this example, the networking layer of the digital interphone is divided into an Admin layer of the highest level, a Manager layer of the middle level, and a Device layer of the lowest level. And the following identity definitions are made:
admin: only one Admin hierarchical device can exist in a complete network, and the Admin hierarchical device is responsible for sending network heartbeat messages, forwarding user messages and part of control signaling at regular time when the network is idle, and other network devices judge the network communication capacity by using the network heartbeat messages.
Manager: in a complete network, there are multiple Manager-level devices, which are responsible for forwarding user messages and part of signaling messages that they receive.
Device: there are multiple devices in a complete network, which do not forward any messages, but only function as functional devices.
Admin and Manager are also devices at the same time, and three hierarchy devices can realize identity conversion under the condition that specific conditions are met.
In the dynamic ad hoc network, the following stages can be classified according to the device states: a device network access stage; the Device level Device is in the network phase and the Manager level is in the network phase. The description will now be made in stages.
1. The device is in the network access stage:
when the device is connected to the network, the device sends a network connection request message (101).
After sending the network access request message, the method goes to a receiving mode (102), and a first receiving delay (103) is set, for example, 150 milliseconds.
Detecting whether an acceptance network access request message is received or not in a first receiving time delay period (104), and when the acceptance network access request message is received in the first receiving time delay period, confirming that a message sender is an Admin level or Manager level Device (105), storing a message sender ID (106), and then transferring to an on-network Device management flow of the Device level Device; when no accept network access request message is received during the first receive delay, a second receive delay (107), e.g., a delay of 150 milliseconds, is set.
Detecting whether an acceptance network access request message is received or not in the second receiving time delay period (108), and when the acceptance network access request message is received in the second receiving time delay period, confirming that the message sender is the nearest Device level equipment (109), storing the message sender ID (106), and then transferring to the network equipment management flow of the Device level equipment; and when the network access request message is not received in the second receiving time delay period, no other equipment is considered in the network, the hierarchy of the equipment is set to be an Admin hierarchy (111), and the network equipment management flow of the Admin hierarchy equipment is shifted.
2. The Device level Device is in the network phase:
when the Device level equipment is on the network, a heartbeat period Thb is set, a heartbeat message (201) sent by the Admin equipment is received, and if the heartbeat message is not received in the heartbeat period, the network access process is restarted; if a heartbeat message is received, a receive mode is entered (202). The types of the received messages are classified into signaling messages, user data messages and the like. The signaling message comprises a network access request message, a network access receiving request message and the like.
During the time delay of receiving, detecting whether the received content is a message (203), if the received message is a message, further detecting whether the received message is a signaling message (204), and if the received message is a signaling message, further detecting whether the signaling message is a network detection message sent by Admin, namely a heartbeat message (205) or a network access request message (208); returning to a receiving state (202) when the received message is a heartbeat message sent by Admin; when the received message is a network access request message, setting a first receiving time delay (209), for example, setting 150 milliseconds, and detecting whether the network access request message sent by other equipment is received (210); when receiving a network access request message sent by other equipment in the first receiving time delay period, indicating that the network access request is accepted by the equipment of an Admin level or Manager level, stopping the first receiving time delay (211) and returning to a receiving state (202) if the equipment sending the network access request message finishes network access; when the network access request message sent by other devices is not received during the first receiving time delay, the network access request message is not received, which means that no Admin level or Manager level device exists in the network device, after the expiration of the first receiving time delay, a sending time delay is set (212), and during the sending time delay, whether the network access request message is received or not is detected (213).
When the network access request message is received during the transmission delay period, which means that other Device level devices closer in distance receive the network access request and send the network access request message (214), the transmission delay is ended (215), and the step 202 is returned.
And when the network access request message sent by other equipment is not received in the transmission time delay period, which means that no Device level equipment which is closer to the network access request equipment receives the network access request, after the transmission time delay is expired, the network access request message is sent, and the level of the Device is set as a Manager level.
The Manager level Device off-network scenario also occurs during the Device level Device on-network phase. At this time, the Device receives a shutdown message of the Manager level Device, compares whether a message sender ID of the shutdown message is consistent with a stored message sender ID of the Device, if so, indicates that the Manager level Device at an upper level is off-line, and the Manager level Device is off-line, so that all devices of the Manager level Device are off-line, and the Device needs to be re-connected to the network and switches to a network management flow; if not, discarding the message and returning to the receiving state.
3. Manager level device is in the network phase:
setting a heartbeat period (301) and entering a receiving mode (302) when the Manager level device is on the network; detecting whether a heartbeat message sent by the Admin equipment is received (303); if no heartbeat message is received (206) in the heartbeat cycle, sending a network access request message (304), and returning to the step 301; if a heartbeat message is received in the heartbeat period, further detecting the message type (305), if the received message type is a signaling message, further detecting whether the message type is a network access request message (307), and if the received message type is not a signaling message, updating a relay count and forwarding message (306), and returning to the step 301; in step 307, when the received message is an access request message, a transmission delay timer 308 is set, where the set length of the transmission delay is related to the signal strength RSSI attached to the received access request message, for example, set to be |rssi-20|, where the unit of RSSI is dBm and the unit of the transmission delay is millisecond (308).
Detecting whether an acceptance network access request message sent by other equipment is received (309) during the transmission delay period, ending the transmission delay timing (310) when the acceptance network access request message sent by other equipment is received, and returning to the step 302, namely returning to a receiving state; when the network access request message (311) sent by other devices is not received during the sending delay time, after the sending delay time expires, the network access request message (312) is sent, the number of the subordinate devices of the device is increased by one (313), and then the step 302 is returned.
In the Manager level Device on the network phase, a situation that an upper Admin level Device is off-network or a lower Device level Device is off-network occurs.
In step 307, when the received message is not a network access request message, it is further detected whether the message is a shutdown message of the Device level Device (314), and when the shutdown message of the Device level Device is received, the number of the devices at the lower level of the Device is reduced by one (315); it is detected whether the number of devices at the lower level is zero, i.e. Device- = 0 (316), and when the number of devices at the lower level is zero, the hierarchy of the Device is marked as a Device hierarchy (317), and then step 302 is returned.
In step 314, when a shutdown message that is not a Device level Device is received, it is further detected whether a shutdown message of an Admin level Device is received (318), and when a shutdown message of an Admin level Device is received, a transmission delay is set (319), where the length of the transmission delay is also related to the signal strength RSSI of the received shutdown message, for example, set to |rssi-20|, where the unit of RSSI is dBm, the |rssi| represents an absolute value of RSSI, and the unit of the transmission delay is milliseconds.
During the transmission delay timing, detecting whether an acceptance network access request message of deviceid= -1 is received (320), and returning to a receiving state when the acceptance network access request message of deviceid= -1 is received (302), wherein DeviceID represents a message sender ID; when the transmission delay timing expires and the network access request message of DeviceID= -1 is not received yet, transmitting the network access request message of DeviceID= -1 (321); the hierarchy of the device is then labeled Admin (322), at which point the device co-operates at the Admin hierarchy. At the Admin level, a heartbeat cycle Thb is initiated (323), at the heartbeat cycle, it is detected whether a heartbeat message responded by the lower level device is received (324), when the heartbeat message is received, the heartbeat message is processed (325), when no heartbeat message is detected at the heartbeat cycle, a network detection message, or a called heartbeat message (327) is sent, and then step 323 is returned.
The invention divides the equipment layer into three stages, controls the layer conversion according to the received signaling message and the receiving time, realizes the dynamic mesh networking of the equipment in the network access management and the network management, can greatly reduce the problem of air interface signal conflict in the public digital interphone mesh network, has strong network robustness due to the dynamic adjustment function, and can be applied to emergency communication.
The dynamic self-networking method is also suitable for networking of other Mesh network products.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (4)

1. A dynamic ad hoc network method of a digital interphone, characterized in that on-network devices are marked as Admin level, manager level and device level, comprising:
a network access management flow of the equipment;
an in-network management flow of the Device level Device;
the on-line management flow of Manager-level devices;
an in-network management flow of the Admin-level device;
in the above flow, according to the received signaling message and the control level conversion of the receiving time, the control parameters of the receiving time include receiving time delay and transmitting time delay, wherein the transmitting time delay is the time delay before the network device transmits data, the transmitting time delay is related to the signal strength RSSI of the received message before transmission, and the larger the RSSI is, the smaller the transmitting time delay is;
the sending time delay is expressed as the difference between the absolute value of RSSI and a constant, wherein the unit of RSSI is dBm, and the unit of sending time delay is millisecond;
the network access management flow of the equipment comprises the following steps:
sending a network access request message; after sending a network access request message, setting a first receiving time delay, and entering a receiving mode;
when receiving a message for receiving a network access request during a first receiving time delay, storing a message sender ID, marking the Device as a Device level, and transferring to an in-network management flow of the Device level Device;
setting a second receiving delay after the expiration of the first receiving delay when the network access request message is not received during the first receiving delay;
when receiving a message for receiving the network access request during the second receiving time delay, storing a message sender ID, marking the equipment as a Device level, and transferring to an in-network management flow of the Device level equipment;
when the network access request message is not received during the second receiving time delay, marking the equipment as an Admin level after the second receiving time delay expires, and transferring to an in-network management flow of the Admin level equipment;
the in-network management flow of the Device level Device comprises the following steps:
setting a heartbeat period, receiving a heartbeat message sent by the Admin equipment, and restarting a network access flow if the heartbeat message is not received in the heartbeat period;
when the received message is a network access request message, setting a fourth receiving time delay;
when the network access request message is received in the fourth receiving time delay period, stopping the fourth receiving time delay and returning to the receiving state;
when the network access request message is not received in the fourth receiving time delay period, setting a sending time delay after the fourth receiving time delay is expired;
when receiving the network access request message in the transmission delay period, ending the transmission delay and returning to the receiving state;
when the network access request message is not received in the transmission time delay period, after the transmission time delay is expired, the network access request message is transmitted, the equipment is marked as a Manager level, and the in-network management flow of Manager level equipment is shifted;
the in-network management flow of the Manager level device comprises the following steps:
periodically receiving a heartbeat message sent by the Admin equipment, and restarting a network access process if the heartbeat message is not received in the heartbeat period;
when the received message is a network access request message, setting a sending time delay;
when receiving the network access request message in the transmission delay period, ending the transmission delay and returning to the receiving state;
when the network access request message is not received in the transmission time delay period, after the transmission time delay is expired, the network access request message is transmitted, the number of the lower-level devices of the device is increased by one, and then the receiving state is returned;
the in-network management flow of the Admin hierarchical device comprises the following steps:
starting a heartbeat timer and periodically sending heartbeat messages;
when receiving messages sent by other layers of equipment in a heartbeat period, processing the messages;
and when the messages sent by the devices at other levels are not received in the heartbeat period, sending heartbeat messages, and restarting the heartbeat timer.
2. The dynamic ad hoc network method of claim 1, wherein the in-network management flow of the Device level Device further comprises:
when the received message is a shutdown message of a Manager level, comparing whether the message sender ID of the shutdown message is consistent with the stored Manager message sender ID, and if so, re-executing the network access management flow by the equipment; if not, discarding the message.
3. The dynamic ad hoc network method of claim 1, wherein the in-network management flow of the Manager-level device further comprises:
when the received message is a shutdown message of the Device level equipment, subtracting one from the number of subordinate equipment of the equipment; when the number of the lower-level devices of the Device is zero, the Device is marked as a Device level, and then the Device level Device is transferred to the in-network management flow.
4. The dynamic ad hoc network method of claim 1, wherein the in-network management flow of the Manager-level device further comprises:
when the received message is a shutdown message of the Admin level equipment, setting a sending time delay;
when receiving a network access request message with the ID of a message sender of-1 in the transmission time delay period, returning to a receiving state;
when the network access request message with the ID of the message sender of-1 is not received in the transmission time delay period, after the expiration of the transmission time delay, the network access request message with the ID of-1 is transmitted; and marking the equipment as an Admin level, and then transferring to an in-network management flow of the Admin level equipment.
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