CN109104320B - Method for improving communication network capacity - Google Patents
Method for improving communication network capacity Download PDFInfo
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- CN109104320B CN109104320B CN201811013702.8A CN201811013702A CN109104320B CN 109104320 B CN109104320 B CN 109104320B CN 201811013702 A CN201811013702 A CN 201811013702A CN 109104320 B CN109104320 B CN 109104320B
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- terminal equipment
- server
- reporting period
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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
- H04L41/0896—Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
Abstract
The invention is suitable for the field of communication networks, and provides a method for improving the capacity of a communication network, which comprises a server, a client connected with the server, a plurality of gateways connected with the server, and a plurality of terminal devices connected with the gateways, wherein the server, the gateways and the terminal devices are communicated by adopting a LoRaWAN protocol, so that the technical problem that the LoRa network capacity is limited is solved.
Description
Technical Field
The invention belongs to the field of communication networks, and particularly relates to a method for improving the capacity of a communication network.
Background
Due to the low data rate characteristic of the LoRa communication, when the transmitted data volume is large, the transmission time is long, when the number of nodes in the network is large, the packet loss rate becomes high, the capacity of the whole LoRa network is limited, and the network capacity can be greatly influenced if the reporting period of the nodes is not scientifically managed; secondly, in the currently used LoRa network, the capacity of the whole network cannot be dynamically increased along with the increase of the number of nodes; under the network environment of adopting simplex duplex gateway or uplink and downlink same frequency communication, the unreasonable use of uplink and downlink also makes the whole LoRa network capacity be restricted.
Disclosure of Invention
The invention aims to provide a method for improving the capacity of a communication network, and aims to solve the technical problem that the capacity of an LoRa network is limited.
The invention is realized in this way, a method for improving communication network capacity, including the server, connect the customer end of the said server, several gateways to connect the said server, and several terminal equipments to connect the said gateway, the said server, said gateway and the communication of the said terminal equipment all adopt LoRaWAN agreement, the said server: the gateway is used for periodically sending heartbeat packets to the gateway in a multicast mode and processing uplink data and control instructions or downlink data of the client; the gateway: the device is used for forwarding the uplink data and the downlink data; the terminal device: the system is used for periodically sending the non-determined uplink data reporting state, processing the heartbeat packet sent by the server and processing downlink data; the client side comprises the following steps: the device is used for sending a control instruction or checking the working state; the method comprises the following steps:
step S1: the server processes the uplink data, firstly, the server receives the uplink data sent by the terminal equipment, the server calculates the packet loss rate of the terminal equipment and the average packet loss rate of all the terminal equipment according to the frame number of the uplink data, judges whether the packet loss rate of the terminal equipment is greatly higher than the average packet loss rate, if not, judges whether the average packet loss rate of all the terminal equipment reaches a certain threshold, if so, the server adds the packet loss information of the terminal equipment to a heartbeat packet to inform the terminal equipment, the terminal equipment processes the heartbeat packet according to the overhigh packet loss rate of individual terminal equipment, after the terminal equipment processes the heartbeat packet loss rate, if so, the average packet loss rate of all the terminal equipment reaches the certain threshold, if not, the server reports the heartbeat packet loss rate to the client, and judges whether the average packet loss rate of all the terminal equipment reaches the certain threshold or not, if not, the server finishes processing the uplink data, if so, the server calculates the minimum reporting period Tm of the terminal equipment according to the current LoRa network capacity and notifies the client, the server adds the average packet loss information and the minimum reporting period Tm to the heartbeat packet to notify all the terminal equipment, all the terminal equipment processes according to the fact that the packet loss rate of the terminal equipment is generally too high, and judges whether the packet loss rate is reduced or not after the terminal equipment processes, if so, the server finishes processing the uplink data, if not, the server reports the uplink data to the client and finishes processing the uplink data; step S2: processing individual terminal equipment with too high packet loss rate, firstly judging whether a heartbeat packet is received or not, if not, finishing the processing, if so, judging whether the heartbeat packet has matched DevAddr or not, finishing the processing, if so, informing that the packet loss of the terminal equipment is serious, acquiring RSSI and SNR when the heartbeat packet is received, judging whether the RSSI or the SNR is too poor or not, if not, finishing the processing, and if so, increasing the transmission power or the smaller data rate and finishing the processing;
step S3: the method comprises the steps of firstly judging whether a heartbeat packet is received or not, if not, ending the processing, if so, judging whether average packet loss rate information and a minimum reporting period Tm are carried in the heartbeat packet or not, if not, ending the processing, if so, judging whether a duty ratio constraint exists or not, if so, judging whether the minimum reporting period Tm is smaller than a minimum reporting period T1 of the duty ratio constraint or not, if not, judging whether the minimum reporting period Tm is smaller than a currently used reporting period Tc or not, if so, judging whether the minimum reporting period T1 of the duty ratio constraint is smaller than the currently used reporting period Tc or not, if not, setting the uplink reporting period of the terminal equipment to Tm, if so, keeping the uplink reporting period of the terminal equipment to Tc, wherein judging whether the minimum reporting period T1 of the duty ratio constraint is smaller than the currently used reporting period Tc or not, if so, keeping the uplink reporting period of the terminal equipment to be Tc, otherwise, setting the uplink reporting period of the terminal equipment to be T1, splitting the data required to be reported by the terminal equipment into primary and secondary parts according to the actual situation of the uplink reporting period of the terminal equipment, and inserting the secondary parts into the report every several reporting periods so as to reduce the data volume of the whole network and finish the processing.
The further technical scheme of the invention is as follows: the minimum reporting period Tm in step S1 is calculated according To a calculation formula Tm ═ Nn × To/(Nc × Nd), where To is an average air transmission time of the uplink data obtained by calculating the air transmission time of each uplink data by the server; nn is the number of nodes in the current network; nc is the maximum number of channels used by the current network; nd is the number of data rate classes used in the current network.
The further technical scheme of the invention is as follows: the terminal equipment is of a Class C type.
The further technical scheme of the invention is as follows: the server is a LoRaWAN server.
The further technical scheme of the invention is as follows: the gateway is a LoRaWAN gateway.
The invention has the beneficial effects that: the server can dynamically adjust the reporting period of the terminal equipment according to the current network capacity condition and the common packet loss condition of all the terminal equipment, so that the whole network capacity has a self-adaptive attribute and can be dynamically increased along with the increase of the number of the terminal equipment; the phenomenon that the packet loss rate of individual terminal equipment is too high can be specifically processed and abnormal prejudgment can be made; reasonably dividing uplink data of the terminal equipment, and inserting and reporting secondary data after a few reporting periods, so that the data volume of the whole network is reduced as much as possible; the uplink data is uniformly used in a non-definite uplink mode, and the downlink data is multicast as much as possible, so that the downlink data of the whole network is greatly reduced, and the network capacity can be improved.
Drawings
Fig. 1 is a system configuration diagram of a method for increasing capacity of a communication network according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a process of processing uplink data by a server according to a method for increasing capacity of a communication network according to an embodiment of the present invention;
fig. 3 is a processing flowchart of the method for increasing the capacity of the communication network according to the embodiment of the present invention, in which the packet loss rate of the individual terminal device is too high;
fig. 4 is a flowchart of processing that a packet loss rate of a terminal device is generally too high according to a method for increasing a communication network capacity provided in an embodiment of the present invention.
Detailed Description
Fig. 1 to 4 show a method for increasing communication network capacity provided by the present invention, which includes a server, a client connected to the server, a plurality of gateways connected to the server, and a plurality of terminal devices connected to the gateways, where the server, the gateways, and the terminal devices all use a LoRaWAN protocol for communication, and the server: the gateway is used for periodically sending heartbeat packets to the gateway in a multicast mode and processing uplink data and control instructions or downlink data of the client; the gateway: the device is used for forwarding the uplink data and the downlink data; the terminal device: the system is used for periodically sending the non-determined uplink data reporting state, processing the heartbeat packet sent by the server and processing downlink data; the client side comprises the following steps: the device is used for sending a control instruction or checking the working state; the method comprises the following steps:
step S1: the server processes the uplink data, firstly, the server receives the uplink data sent by the terminal equipment, the server calculates the packet loss rate of the terminal equipment and the average packet loss rate of all the terminal equipment according to the frame number of the uplink data, judges whether the packet loss rate of the terminal equipment is greatly higher than the average packet loss rate, if not, judges whether the average packet loss rate of all the terminal equipment reaches a certain threshold, if so, the server adds the packet loss information of the terminal equipment to a heartbeat packet to inform the terminal equipment, the terminal equipment processes the heartbeat packet according to the overhigh packet loss rate of individual terminal equipment, after the terminal equipment processes the heartbeat packet loss rate, if so, the average packet loss rate of all the terminal equipment reaches the certain threshold, if not, the server reports the heartbeat packet loss rate to the client, and judges whether the average packet loss rate of all the terminal equipment reaches the certain threshold or not, if not, the server finishes processing the uplink data, if so, the server calculates the minimum reporting period Tm of the terminal equipment according to the current LoRa network capacity and notifies the client, the server adds the average packet loss information and the minimum reporting period Tm to the heartbeat packet to notify all the terminal equipment, all the terminal equipment processes according to the fact that the packet loss rate of the terminal equipment is generally too high, and judges whether the packet loss rate is reduced or not after the terminal equipment processes, if so, the server finishes processing the uplink data, if not, the server reports the uplink data to the client and finishes processing the uplink data; step S2: processing individual terminal equipment with too high packet loss rate, firstly judging whether a heartbeat packet is received or not, if not, finishing the processing, if so, judging whether the heartbeat packet has matched DevAddr or not, finishing the processing, if so, informing that the packet loss of the terminal equipment is serious, acquiring RSSI and SNR when the heartbeat packet is received, judging whether the RSSI or the SNR is too poor or not, if not, finishing the processing, and if so, increasing the transmission power or the smaller data rate and finishing the processing;
step S3: the method comprises the steps of firstly judging whether a heartbeat packet is received or not, if not, ending the processing, if so, judging whether average packet loss rate information and a minimum reporting period Tm are carried in the heartbeat packet or not, if not, ending the processing, if so, judging whether a duty ratio constraint exists or not, if so, judging whether the minimum reporting period Tm is smaller than a minimum reporting period T1 of the duty ratio constraint or not, if not, judging whether the minimum reporting period Tm is smaller than a currently used reporting period Tc or not, if so, judging whether the minimum reporting period T1 of the duty ratio constraint is smaller than the currently used reporting period Tc or not, if not, setting the uplink reporting period of the terminal equipment to Tm, if so, keeping the uplink reporting period of the terminal equipment to Tc, wherein judging whether the minimum reporting period T1 of the duty ratio constraint is smaller than the currently used reporting period Tc or not, if so, keeping the uplink reporting period of the terminal equipment to be Tc, otherwise, setting the uplink reporting period of the terminal equipment to be T1, splitting the data required to be reported by the terminal equipment into primary and secondary parts according to the actual situation of the uplink reporting period of the terminal equipment, and inserting the secondary parts into the report every several reporting periods so as to reduce the data volume of the whole network and finish the processing.
The minimum reporting period Tm in step S1 is calculated according To a calculation formula Tm ═ Nn × To/(Nc × Nd), where To is an average air transmission time of the uplink data obtained by calculating the air transmission time of each uplink data by the server; nn is the number of nodes in the current network; nc is the maximum number of channels used by the current network; nd is the number of data rate classes used in the current network.
The terminal equipment is of a Class C type; the nodes in the flow chart represent terminal devices.
The server is a LoRaWAN server.
The gateway is a LoRaWAN gateway.
Class C: in one type of LoRaWAN, the terminal device maintains a receiving state at other times except for the time of transmitting data; DevAddr: device address in LoRaWAN protocol; and the minimum reporting period Tl of the duty ratio constraint is equal to the air transmission time/duty ratio of the uplink to be sent.
The server can dynamically adjust the reporting period of the terminal equipment according to the current network capacity condition and the common packet loss condition of all the terminal equipment, so that the whole network capacity has a self-adaptive attribute and can be dynamically increased along with the increase of the number of the terminal equipment; the phenomenon that the packet loss rate of individual terminal equipment is too high can be specifically processed and abnormal prejudgment can be made; reasonably dividing uplink data of the terminal equipment, and inserting and reporting secondary data after a few reporting periods, so that the data volume of the whole network is reduced as much as possible; the uplink data is uniformly used in a non-definite uplink mode, and the downlink data is multicast as much as possible, so that the downlink data of the whole network is greatly reduced, and the network capacity can be improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A method for improving communication network capacity comprises a server, a client connected with the server, a plurality of gateways connected with the server, and a plurality of terminal devices connected with the gateways, wherein the server, the gateways and the terminal devices all adopt LoRaWAN protocol for communication, and is characterized in that the server: the gateway is used for periodically sending heartbeat packets to the gateway in a multicast mode and processing uplink data and control instructions or downlink data of the client; the gateway: the device is used for forwarding the uplink data and the downlink data; the terminal device: the system is used for periodically sending the non-determined uplink data reporting state, processing the heartbeat packet sent by the server and processing downlink data; the client side comprises the following steps: the device is used for sending a control instruction or checking the working state; the method comprises the following steps:
step S1: the server processes the uplink data, firstly, the server receives the uplink data sent by the terminal equipment, the server calculates the packet loss rate of the terminal equipment and the average packet loss rate of all the terminal equipment according to the frame number of the uplink data, judges whether the packet loss rate of the terminal equipment is greatly higher than the average packet loss rate, if not, judges whether the average packet loss rate of all the terminal equipment reaches a certain threshold, if so, the server adds the packet loss information of the terminal equipment to a heartbeat packet to inform the terminal equipment, the terminal equipment processes the heartbeat packet according to the overhigh packet loss rate of individual terminal equipment, after the terminal equipment processes the heartbeat packet loss rate, if so, the average packet loss rate of all the terminal equipment reaches the certain threshold, if not, the server reports the heartbeat packet loss rate to the client, and judges whether the average packet loss rate of all the terminal equipment reaches the certain threshold or not, if not, the server finishes processing the uplink data, if so, the server calculates a minimum reporting period Tm of the terminal device according To the current LoRa network capacity, wherein the minimum reporting period Tm is calculated according To a calculation formula Tm ═ Nn × To/(Nc × Nd), wherein To is used for calculating the air transmission time of each uplink data by the server, and obtaining the average air transmission time of the uplink data; nn is the number of nodes in the current network; nc is the maximum number of channels used by the current network; nd is the number of data rate levels used in the current network, the data rate levels are notified to a client, the server adds average packet loss information and the minimum reporting period Tm to a heartbeat packet to notify all terminal devices, all the terminal devices are processed according to the fact that the packet loss rate of the terminal devices is generally too high, whether the packet loss rate is reduced or not is judged after the terminal devices are processed, if yes, the server finishes processing uplink data, if not, the server reports the uplink data to the client, and the uplink data processing is finished;
step S2: processing individual terminal equipment with excessively high packet loss rate, firstly judging whether a heartbeat packet is received, if not, ending the processing, and if so, judging whether the heartbeat packet has matched DevAddr, wherein the DevAddr: if the address of the equipment in the LoRaWAN protocol is not the same as the address of the equipment in the LoRaWAN protocol, ending the processing, if the address of the equipment in the LoRaWAN protocol is not the same as the address of the equipment in the LoRaWAN protocol, informing that the packet loss of the terminal equipment is serious, acquiring the RSSI and the SNR when the heartbeat packet is received, judging whether the RSSI or the SNR is too poor, if the RSSI or the SNR is not the same as the address of the equipment in the LoRaWAN protocol, ending the processing, if the RSSI or the SNR is too poor, increasing the transmission power or the lower data rate, and ending the processing;
step S3: the method comprises the steps of firstly judging whether a heartbeat packet is received or not, if not, ending the processing, if so, judging whether average packet loss rate information and a minimum reporting period Tm are carried in the heartbeat packet or not, if not, ending the processing, if so, judging whether a duty ratio constraint exists or not, if so, judging whether the minimum reporting period Tm is smaller than a minimum reporting period T1 of the duty ratio constraint or not, if so, judging whether a minimum reporting period Tl of the duty ratio constraint is equal to the air transmission time/duty ratio of an uplink to be sent, if not, judging whether the minimum reporting period Tm is smaller than a currently used reporting period Tc or not, if so, judging whether the minimum reporting period T1 of the duty ratio constraint is smaller than the currently used reporting period Tc or not, wherein, judging whether the minimum reporting period Tm is smaller than the currently used reporting period Tc or not, if not, setting the uplink reporting period of the terminal equipment to be Tm as Tm, if so, keeping the uplink reporting period of the terminal equipment to be Tc, wherein whether the minimum reporting period T1 of the duty ratio constraint is smaller than the currently used reporting period Tc is judged, if so, keeping the uplink reporting period of the terminal equipment to be Tc is judged, otherwise, setting the uplink reporting period of the terminal equipment to be T1, splitting the data required to be reported by the terminal equipment into a primary part and a secondary part according to the actual situation of the uplink reporting period of the terminal equipment, and inserting the secondary part into the report every other reporting period to reduce the data volume of the whole network and finish the processing.
2. The method according to claim 1, characterized in that said terminal equipment is a Class C type terminal equipment.
3. The method of claim 2, wherein the server is a LoRaWAN server.
4. The method of claim 3, wherein the gateway is a LoRaWAN gateway.
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| CN110392384B (en) * | 2019-07-23 | 2020-09-18 | 厦门大学 | Method for realizing specific downlink duty ratio of LoRa gateway based on conditional probability |
| CN111800882B (en) * | 2020-06-18 | 2023-12-05 | 武汉慧联无限科技有限公司 | Method, device, server and storage medium for transmitting downlink data |
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| CN107317795B (en) * | 2017-05-08 | 2021-07-09 | 贵阳朗玛信息技术股份有限公司 | Method and device for adjusting code rate of data packet |
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| CN106879038A (en) * | 2017-03-30 | 2017-06-20 | 新华三技术有限公司 | Work state switching method and device |
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