CN114125938B - Communication device scheduling method, server, data reporting method and communication device - Google Patents
Communication device scheduling method, server, data reporting method and communication device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W56/003—Arrangements to increase tolerance to errors in transmission or reception timing
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Abstract
The invention provides a communication device scheduling method, a Cheng Cifu device, a data reporting method and a communication device. The communication device scheduling method comprises the following steps: assigning a first transmission time, a second transmission time and a first scheduling channel to the communication device so as to control the communication device to respectively transmit first data and second data at the first transmission time and the second transmission time by using the first scheduling channel; in response to receiving the first data at the first receiving time, calculating a first time offset according to the first receiving time; and adjusting the second transmission time based on the first time offset to control the communication device to transmit the second data using the first scheduling channel at the adjusted second transmission time.
Description
Technical Field
The present invention relates to a scheduling method, a server, a method for reporting data, and a communication device, and more particularly, to a scheduling method, a Cheng Cifu device, a method for reporting data, and a communication device.
Background
With the development of technology and the evolution of the era, the related technology of the internet of things (Internet of Things, ioT) has been getting more and more attention. In IoT, some communication devices do not need to transmit high amounts of data, but rather require low power connections to maintain longer operation, thus facilitating low power wireless wide area networks (LPWANs) such as LoRaWAN (Long Range Wide Area Network). LoRaWAN has the three characteristics of low power consumption, low cost, long transmission distance and the like, can meet the application requirements of the Internet of things which need to operate for a long time, are powered by batteries and are largely constructed, is rapidly favored by telecom operators, and is started to be applied to the infrastructure of intelligent cities and intelligent industries.
In the LoRaWAN, when the state of the communication device changes (e.g., certain events are detected), it can send a request to the host side. However, if two communication devices transmit data to the host at the same frequency band, the host can only receive data from one communication device at a time, and cannot receive multiple data at the same time, so these data may be lost due to collision (collision). This may occur at the host side in addition to the communication devices. When the host transmits the downlink data to the communication device, if other devices also use the same frequency band to transmit data, the host may also encounter collision.
For the communication device, if no acknowledgement (ack) is received from the host, the communication device will continuously attempt retransmission. However, this not only causes the bandwidth to be occupied, but also increases the probability of collision with other communication devices.
Disclosure of Invention
In view of the above, the present invention provides a method for scheduling a communication device, a device for scheduling Cheng Cifu, a method for reporting data, and a communication device, which can be used to solve the above-mentioned problems.
The invention provides a communication device scheduling method, which is suitable for a scheduling server for managing a plurality of communication devices, and comprises the following steps: assigning a first transmission time, a second transmission time and a first scheduling channel to a first communication device in the communication devices so as to control the first communication device to transmit first data and second data respectively at the first transmission time and the second transmission time by using the first scheduling channel; in response to receiving the first data at a first receiving time, calculating a first time offset according to the first receiving time; and adjusting the second transmission time based on the first time offset to control the first communication device to transmit the second data using the first scheduling channel at the adjusted second transmission time.
The invention provides a rank Cheng Cifu device which comprises a storage circuit, a transceiver and a processor. The memory circuit stores a plurality of modules. The processor is coupled to the memory circuit and the transceiver, and accesses the aforementioned modules to execute the following steps: the control transceiver assigns a first transmission time, a second transmission time and a first scheduling channel to a first communication device in the communication devices so as to control the first communication device to respectively transmit first data and second data by using the first scheduling channel at the first transmission time and the second transmission time; in response to the transceiver receiving the first data at a first receiving time, calculating a first time offset according to the first receiving time; and adjusting the second transmission time based on the first time offset, and controlling the transceiver to request the first communication device to transmit the second data using the first scheduling channel at the adjusted second transmission time.
The invention provides a method for reporting data, which is suitable for a communication device managed by a scheduling server and comprises the following steps: receiving a first transmit time, a second transmit time, and a first scheduling lane assigned by the rank Cheng Cifu from the rank Cheng Cifu; transmitting a first data to the bank Cheng Cifu using the first schedule channel at a first transmit time; receiving the adjusted second transfer time from the bank Cheng Cifu; and transmitting a second data using the first scheduling channel at the adjusted second transmission time.
The invention provides a communication device, which comprises a storage circuit, a transceiver and a processor. The memory circuit stores a plurality of modules. The processor is coupled to the memory circuit and the transceiver, and accesses the aforementioned modules to execute the following steps: receiving a first transmit time, a second transmit time, and a first scheduling lane assigned by the rank Cheng Cifu from the rank Cheng Cifu; controlling the transceiver to transmit a first data to the bank Cheng Cifu using the first scheduling channel at a first transmit time; receiving the adjusted second transfer time from the bank Cheng Cifu; and controlling the transceiver to transmit a second data using the first scheduling channel at the adjusted second transmission time.
Based on the above, the present invention can make the rank Cheng Cifu assign different scheduling channels and/or transmission times to different communication devices, and control the transmission time after the adjustment of the communication device according to the time offset of the received data, so as to achieve the purposes of synchronization and accurate collision avoidance between the rank Cheng Cifu device and the communication device.
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a schematic diagram of a bank Cheng Cifu device and communication device according to an embodiment of the invention;
FIG. 2 is a flow chart illustrating a method for scheduling a communication device according to an embodiment of the invention;
FIG. 3 is a schematic diagram illustrating the division of communication devices into groups according to an embodiment of the invention;
FIG. 4 is a diagram illustrating a method for reporting data according to an embodiment of the invention.
Reference numerals illustrate:
11. 12, …, 1N, 31, 32, …, 3M: communication device
111. 21: memory circuit
112. 22: transceiver with a plurality of transceivers
113. 23: processor and method for controlling the same
20: ranking Cheng Cifu device
D1: first data
D2: second data
F1: first scheduling channel
F2: scheduling channel
G1: group of
T1: first transfer time
T2: second transfer time
T3: transfer time
T2': adjusted second transfer time
S210 to S230, S410 to S440: step (a)
T1: first transfer time
T2: second transfer time
Detailed Description
Referring to fig. 1, a schematic diagram of a bank Cheng Cifu device and a communication device according to an embodiment of the invention is shown. In fig. 1, each communication device 11, 12, …, 1N may be an IoT device, and the bank Cheng Cifu device 20 may be used to manage the communication devices 11-1N, for example. For example, the communication devices 11-1N may be devices such as smoke detectors, gas detectors, temperature detectors, or other similar IoT devices that may be used to report certain events (e.g., fire, temperature, etc.) detected to the bank Cheng Cifu device 20 when such detected events are detected.
In summary, in the embodiment of the present invention, the scheduler Cheng Cifu device 20 can schedule different scheduling channels and/or different transmission times for the communication devices 11-1N, so as to avoid collision of the communication devices 11-1N when reporting, and reduce the probability of data loss, unlike the conventional method of having IoT devices report events by random access. The details will be described later.
In fig. 1, the configuration of each communication device 11-1N is substantially the same, and the scheduling of each communication device 11-1N by the bank Cheng Cifu device 20 is similar, so the following description will be based on the interaction between the communication device 11 and the bank Cheng Cifu device 20 only, and those skilled in the art should be able to derive the interaction between the bank Cheng Cifu device 20 and the communication devices 12-1N based on the relevant teachings.
As shown in fig. 1, the communication device 11 includes a memory circuit 111, a transceiver 112, and a processor 113. The storage circuit 111 is, for example, any type of fixed or removable random access Memory (Random Access Memory, RAM), read-Only Memory (ROM), flash Memory (Flash Memory), hard disk or other similar devices or combinations of these devices, and may be used to record a plurality of program codes or modules. In various embodiments, the program codes and modules in the memory circuit 111 are accessible to the processor 113 to implement the method according to the present invention.
The transceiver 112 may be a component such as a protocol unit that supports signaling for a global system for mobile communications (global system for mobile communication, GSM), personal Handyphone System (PHS), code division multiple access (code division multiple access, CDMA) system, wireless fidelity (wireless fidelity, wi-Fi) system, or worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX).
The transceiver 112 also provides wireless access to the communication device 11 of fig. 1 by means of components including at least transmitter circuitry, receiver circuitry, analog-to-digital (a/D) converters, digital-to-analog (D/a) converters, low noise amplifiers (low noise amplifier, LNAs), mixers, filters, matching circuits, transmission lines, power Amplifiers (PA), one or more antenna elements, and a local storage medium, but not limited thereto.
The receiver circuit may include functional units to perform operations such as low noise amplification, impedance matching, frequency mixing, down-conversion, filtering, amplification, and the like. The transmitter circuit may include functional units to perform operations such as amplification, impedance matching, frequency mixing, up-frequency conversion, filtering, power amplification, and the like. The a/D converter or D/a converter is configured to convert the analog signal format into a digital signal format during upstream signal processing and to convert the digital signal format into an analog signal format during downstream signal processing.
The processor 113 is coupled to the memory 111 and the transceiver 112, and may be a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, a controller, a microcontroller, an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array circuit (Field Programmable Gate Array, FPGA), any other type of integrated circuit, a state machine, an advanced reduced instruction set machine (Advanced RISC Machine, ARM) based processor, and the like.
In addition, as shown in fig. 1, the bank Cheng Cifu includes a memory circuit 21, a transceiver 22 and a processor 23, and respective possible embodiments thereof can refer to the related descriptions of the memory circuit 111, the transceiver 112 and the processor 113, which are not repeated herein.
Referring to fig. 2, a flowchart of a method for scheduling a communication device according to an embodiment of the invention is shown. The method of this embodiment may be performed by the rank Cheng Cifu device 20 of fig. 1, and details of the steps of fig. 2 are described below in conjunction with the elements shown in fig. 1.
First, in step S210, the processor 23 of the bank Cheng Cifu can assign the first transmission time T1, the second transmission time T2 and the first schedule channel F1 to the communication device 11 to control the communication device 11 to transmit the first data D1 and the second data D2 respectively using the first schedule channel F1 at the first transmission time T1 and the second transmission time T2.
Accordingly, the processor 113 of the communication device 11 may receive the first transmission time T1, the second transmission time T2, and the first scheduling channel F1 assigned by the bank Cheng Cifu from the bank Cheng Cifu device 20. Thereafter, the processor 113 of the communication device 11 can control the transceiver 112 to transmit the first data D1 to the bank Cheng Cifu device 20 using the first scheduling channel F1 at the first transmission time T1. In a different embodiment, the first data D1 is, for example, an event detected by the communication device 11, and the communication device 11 may transmit the first data D1 to the bank Cheng Cifu at the first transmission time T1.
In addition, the second data D2 is, for example, another event detected after the first data D1, and the communication device 11 may select to transmit the second data D2 to the bank Cheng Cifu device 20 at a second transmission time T2 according to the assignment of the bank Cheng Cifu device 20, wherein the second transmission time T2 occurs after the first transmission time T1.
As described in the previous embodiments, the rank Cheng Cifu can assign different scheduling channels and/or transmission times to different communication devices to avoid collision between communication devices. It can be seen that when the communication device 11 transmits the first data D1 using the first schedule channel F1 at the first transmission time T1, no other communication device transmits the first data D1 using the first schedule channel F1 at the first transmission time T1.
However, if the communication device 11 and the bank Cheng Cifu device 20 do not achieve accurate synchronization, the bank Cheng Cifu device 20 may not be able to receive the first data D1 at the expected time point even if the communication device 11 sends the first data D1 at the first transmission time T1 according to the instruction. When the bank Cheng Cifu device 20 receives the first data D1 at a first receiving time, a collision may occur because data transmitted by another communication device may arrive at the bank Cheng Cifu device 20 at the first receiving time. Therefore, the present invention can avoid this situation through steps S220 and S230.
Specifically, in step S220, in response to receiving the first data D1 at the first receiving time, the processor 23 of the rank Cheng Cifu device 20 can calculate the first time offset according to the first receiving time. In the present embodiment, if the bank Cheng Cifu device 20 is estimated to receive the first data D1 at a certain expected time (e.g., the first transmission time T1), the processor 23 can calculate the first time offset by subtracting the expected time from the first reception time, i.e., how long the bank Cheng Cifu device 20 is to receive the first data D1, but the invention is not limited thereto.
Thereafter, in step S230, the processor 23 may adjust the second transmission time T2 based on the first time offset to control the communication device 11 to transmit the second data D2 using the first scheduling channel F1 at the adjusted second transmission time T2'. In one embodiment, the processor 23 may subtract the first time offset from the second transmission time T2 to obtain an adjusted second transmission time T2'. That is, the adjusted second transfer time T2' is the second transfer time T2 advanced by the first time offset.
In this case, when the communication device 11 sends the second data D2 using the first scheduling channel F1 at the second transmission time T2' according to the instruction, the scheduler Cheng Cifu device 20 can accurately receive the second data D2 at the expected time point. In other words, the above mechanism can achieve the synchronization effect between the communication device 11 and the bank Cheng Cifu device 20, so as to avoid collision.
In various embodiments, the queue Cheng Cifu device 20 can directly inform the communication device 11 of the adjusted second transmission time T2', or can inform the communication device 11 of only the first time offset, so that the communication device 11 can calculate the adjusted second transmission time T2' according to the above teachings, but the invention is not limited thereto. After calculating the second transmission time T2', the processor 113 of the communication device 11 can control the transceiver 112 to transmit the second data D2 to the bank Cheng Cifu using the first scheduling channel F1 at the second transmission time T2'.
In addition, for other communication devices 12-1N, the rank Cheng Cifu device 20 can assign scheduling channels and transmission times to the communication devices 12-1N according to the teachings described above. Taking the communication device 12 as an example, the scheduler Cheng Cifu can control the communication device 12 to transmit data using the first schedule channel F1 at a transmission time T3, wherein the transmission time T3 is different from the first transmission time T1, the second transmission time T2 and the second transmission time T2' corresponding to the communication device 11. In this case, although both the communication devices 11 and 12 use the first scheduling channel F1 to transmit data, no collision of data occurs due to different transmission time.
Taking the communication device 1N as an example, the scheduler Cheng Cifu can control the communication device 1N to transmit data using the scheduling channel F2 at the first transmission time T1, wherein the scheduling channel F2 is different from the first scheduling channel F1 corresponding to the communication device 11. In this case, although both the communication devices 11 and 1N transmit data at the first transmission time T1, the data collision will not occur due to the different scheduling channels used.
The synchronization mechanism described above may also be implemented between the bank Cheng Cifu and each of the communication devices 12-1N to ensure that no unexpected collisions between the bank Cheng Cifu and each of the communication devices 12-1N are caused by the lack of synchronization.
In one embodiment, in order to enable each communication device 11-1N to join the management of the bank Cheng Cifu device 20, the bank Cheng Cifu device 20 of the present invention may set one or more participating channels among a plurality of available channels. Taking the communication device 11 as an example, when the communication device 11 wants to join the management of the bank Cheng Cifu device 20 (e.g. just complete the power-on procedure), the communication device 11 can first hear whether the joining channel is being occupied by other communication devices. If not, the communication device 11 may send a registration request to the queue Cheng Cifu device 20 via the listening participation channel. On the other hand, if the listening participation channel is being occupied by another communication apparatus, the communication apparatus 11 may wait until the participation channel is unoccupied, then try to transmit a registration request to the bank Cheng Cifu apparatus 20 through the participation channel, or select another unoccupied participation channel to transmit a registration request to the bank Cheng Cifu apparatus 20. After the bank Cheng Cifu receives the registration request from the communication device 11, the first transmission time T1, the second transmission time T2 and the first scheduling channel F1 mentioned in the previous embodiment can be assigned to the communication device 11 accordingly, so that the communication device 11 can schedule the data to be transmitted to the bank Cheng Cifu.
Further, in the existing LoRaWAN, since IoT devices participate in the management of the host side and transfer data through the same batch channel, when the IoT devices attempt to participate in the management of the host side, the IoT devices may collide with other IoT devices that are transferring data. However, since the scheduler Cheng Cifu of the present invention separates the participating channels from the scheduling channels for transmitting data, the probability of collision of the data is reduced.
In addition, in some embodiments, in order for each communication device 11-1N to be able to report the detected emergency (e.g., fire) in real-time, the bank Cheng Cifu of the present invention may set one or more emergency channels among the available channels and inform the communication devices 11-1N of the emergency channels. For example, the queue Cheng Cifu can send the emergency channel to the communication device 11 together with the first transmission time T1, the second transmission time T2 and the first scheduling channel F1 after receiving the registration request from the communication device 11. In this way, when the communication device 11 detects an emergency event, the emergency event can be reported back to the bank Cheng Cifu device 20 through the emergency channel in real time. In one embodiment, when the communication device 11 is about to report an emergency event, it may sequentially attempt to transmit on each emergency channel, or randomly select channels for transmission among the emergency channels, but the invention is not limited thereto.
From the above, the available channels of the scheduler Cheng Cifu can be classified into a scheduling channel, a participating channel, an emergency channel, and the like, so that a more flexible channel usage strategy can be achieved than the conventional LoRaWAN. Also, in various embodiments, the scheduler Cheng Cifu may dynamically adjust the number of scheduling lanes, participating lanes and emergency lanes based on the data reporting status of each communication device 11-1N being managed.
For example, if the bank Cheng Cifu device 20 knows that the communication devices 11-1N are less reporting emergency events based on a mechanism such as machine learning, the bank Cheng Cifu device 20 can change a portion of the emergency channels to the schedule channel or the participating channels accordingly. For another example, if the bank Cheng Cifu device 20 finds that fewer registration requests have been received, the bank Cheng Cifu device 20 may change a portion of the participating channels to a scheduling channel or an emergency channel. Alternatively, if the bank Cheng Cifu device 20 finds that an emergency event is easily received during certain periods, the bank Cheng Cifu device 20 may change a portion of the participating channels to emergency channels during those periods, although the invention is not limited thereto.
In various embodiments, the bank Cheng Cifu device 20 can also transfer the above mentioned various information/signals through the gateway device between the bank Cheng Cifu device 20 and each communication device 11-1N, but the present invention is not limited thereto.
In some embodiments, the communication devices managed by the bank Cheng Cifu device 20 may be numerous, which may result in disadvantages such as insufficient communication resources and difficult management. Thus, the bank Cheng Cifu device 20 can divide the managed communication devices into a plurality of groups, and find a leader device in each group, so that the leader device assists the communication devices in the same group to transmit data to the bank Cheng Cifu device 20. Further description will be provided below with reference to fig. 3.
Fig. 3 is a schematic diagram illustrating a communication device divided into groups according to an embodiment of the invention. In this embodiment, the bank Cheng Cifu device 20 can consider the communication devices 11, 31, 32, …, 3M as a group G1, and the communication device 11 can be selected as a leader device in the group G1. In various embodiments, the principle of selecting the leader device by the rank Cheng Cifu device 20 may be the case. For example, in one embodiment, the bank Cheng Cifu device 20 can select the communication device with the largest signal coverage, the best signal quality, or the closest bank Cheng Cifu device 20 as the leader device of the group, but the invention is not limited thereto.
In one embodiment, after the communication device 11 is selected as the leader device of group G1, it may also perform the mechanism as taught in FIG. 2 on the communication devices 31-3M to assign a scheduling channel and a transmission time to each communication device 31-3M. Alternatively, the scheduling channels and the transmission times corresponding to the communication devices 11, 31-3M may be uniformly arranged by the scheduler Cheng Cifu device 20, but the present invention is not limited thereto.
For communication devices 31-3M, each may report detected events, data to communication device 11 (i.e., the leader device) via the assigned scheduling channel and transmission time. Thereafter, the communication device 11 may report the data from the communication devices 31-3M to the bank Cheng Cifu device 20 via the assigned scheduling channel and transmission time. For example, if the first data D1 is from the communication device 31, the communication device 11 may transmit the first data D1 to the bank Cheng Cifu device 20 at the first transmission time T1 using the first scheduling channel F1, but the invention is not limited thereto.
In addition, in order to facilitate the communication devices 31-3M to report the emergency event, when the communication devices 31-3M detect the emergency event, the emergency event can be directly reported to the bank Cheng Cifu device 20 through the emergency channel provided by the bank Cheng Cifu device 20, without the assistance of the communication device 11 (i.e. the collar device).
Referring to fig. 4, a method for reporting data according to an embodiment of the invention is shown. The method of the present embodiment may be performed by the communication device 11 of fig. 1, and the following description will be made with reference to the elements shown in fig. 1.
First, in step S410, the processor 113 of the communication device 11 may receive the first transmission time T1, the second transmission time T2 and the first scheduling channel F1 assigned by the bank Cheng Cifu from the bank Cheng Cifu device 20. In step S420, the processor 113 may control the transceiver 112 to transmit the first data D1 to the bank Cheng Cifu 20 using the first scheduling channel F1 at the first transmission time T1. In step S430, the processor 113 may receive the adjusted second transfer time T2' from the bank Cheng Cifu device 20. In step S440, the processor 113 may control the transceiver 112 to transmit the second data D2 using the first scheduling channel F1 at the adjusted second transmission time T2'. The details of the above steps may be referred to the description of the previous embodiments, and are not described herein.
In summary, the present invention allows the scheduler Cheng Cifu to assign different scheduling channels and/or transmission times to different communication devices, thereby avoiding data collision. In addition, the rank Cheng Cifu device of the present invention can control the transmission time after the adjustment of the communication device according to the time offset of the received data, so as to achieve the purposes of synchronization and accurate collision avoidance between the rank Cheng Cifu device and the communication device. In addition, the present invention allows the scheduler Cheng Cifu to more flexibly schedule channels assigned to communication devices by dividing the available channels into scheduling channels, participating channels, and emergency channels.
In addition, the communication device of the present invention can be further divided into different groups, and a leader device can be selected from each group for being used as a medium for transferring data of other members of the same group to the bank Cheng Cifu. Therefore, the convenience of the scheduling server for managing the communication device can be improved, and the utilization efficiency of the communication resources can be increased.
Although the invention has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto, but rather may be modified or altered somewhat by persons skilled in the art without departing from the spirit and scope of the invention, which is accordingly defined by the appended claims.
Claims (16)
1. A communications device scheduling method, adapted to manage a plurality of communications devices of a scheduler Cheng Cifu, comprising:
assigning a first transmission time, a second transmission time and a first scheduling channel to a first communication device of the plurality of communication devices, and controlling the first communication device to transmit first data and second data respectively at the first transmission time and the second transmission time by using the first scheduling channel, wherein the second transmission time occurs after the first transmission time;
in response to receiving the first data at a first receive time, calculating a first time offset from the first receive time, comprising:
estimating an expected time corresponding to the first transmission time, and calculating the first time offset by subtracting the expected time from the first reception time, wherein the expected time is a time at which the bank Cheng Cifu expects to receive the first data; and
adjusting the second transmission time based on the first time offset to control the first communication device to transmit the second data using the first scheduling channel at the adjusted second transmission time, wherein the adjusted second transmission time is obtained by subtracting the first time offset from the second transmission time.
2. The method of claim 1, further comprising:
assigning a third transmission time and the first scheduling channel to a second communication device of the plurality of communication devices to control the second communication device to transmit third data using the first scheduling channel at the third transmission time, wherein the third transmission time is different from the first transmission time or the second transmission time.
3. The method of claim 1, further comprising:
assigning the first transmission time and a second scheduling channel to a third communication device of the plurality of communication devices to control the third communication device to transmit fourth data using the second scheduling channel at the first transmission time, wherein the second scheduling channel is different from the first scheduling channel.
4. The method of claim 1, wherein the rank Cheng Cifu has a plurality of available channels, and prior to the step of assigning the first transfer time, the second transfer time, and the first scheduling channel to the first communication device of the plurality of communication devices, further comprising:
setting at least one participation channel in the plurality of available channels;
receiving a registration request of the first communication device through the at least one participation channel;
assigning the first transmission time, the second transmission time, and the first scheduling channel to the first communication device in response to accepting the registration request.
5. The method of claim 4, further comprising:
at least one emergency channel is set in the available channels, and the first communication device is informed of the at least one emergency channel so as to allow the first communication device to report an emergency event through the at least one emergency channel.
6. The method of claim 5, wherein the plurality of available channels further comprises a plurality of scheduling channels, the first scheduling channel is included in the plurality of scheduling channels, and the method further comprises:
the number of the plurality of scheduling channels, the at least one participating channel and the at least one emergency channel is dynamically adjusted based on the data reporting status of each communication device managed by the scheduling server.
7. The method of claim 1, wherein the plurality of communication devices are partitioned into a plurality of groups, the first communication device is a group leader of a first group of the plurality of groups, and the method further comprises:
and receiving data returned by other communication devices in the first group through the first communication device.
8. The method of claim 7, wherein the first communication device has maximum signal coverage in the first group.
9. The method of claim 7, wherein the rank Cheng Cifu has a plurality of available channels, and the method further comprises:
at least one emergency channel is set in the available channels, and the at least one emergency channel is informed to the first group, so that each communication device in the first group is allowed to report emergency events directly through the at least one emergency channel.
10. A rank Cheng Cifu appliance for managing a plurality of communication devices, comprising:
a memory circuit that stores a plurality of modules;
a transceiver;
a processor coupled to the memory circuit and the transceiver, accessing the plurality of modules to perform the steps of:
controlling the transceiver to assign a first transmission time, a second transmission time and a first scheduling channel to a first communication device of the plurality of communication devices, and controlling the first communication device to transmit first data and second data respectively at the first transmission time and the second transmission time by using the first scheduling channel, wherein the second transmission time occurs after the first transmission time;
in response to the transceiver receiving the first data at a first receive time, obtaining a first time offset between the first receive time and the first transmit time, comprising:
estimating an expected time corresponding to the first transmission time, and calculating the first time offset by subtracting the expected time from the first reception time, wherein the expected time is a time at which the bank Cheng Cifu expects to receive the first data; and
adjusting the second transmission time based on the first time offset, and controlling the transceiver to request the first communication device to transmit the second data using the first scheduling channel at the adjusted second transmission time, wherein the adjusted second transmission time is obtained by subtracting the first time offset from the second transmission time.
11. A method of reporting data, adapted to a communication device managed by the scheduling server of claim 10, comprising:
receiving the first transfer time, the second transfer time, and the first scheduling lane assigned by the bank Cheng Cifu from the bank Cheng Cifu;
transmitting first data to the bank Cheng Cifu using the first scheduling lane at the first transmit time;
receiving the adjusted second transfer time from the bank Cheng Cifu; and
and transmitting second data by using the first scheduling channel at the adjusted second transmission time.
12. The method of claim 11, wherein prior to the step of receiving the first transfer time, the second transfer time, and the first scheduling lane assigned by the bank Cheng Cifu from the bank Cheng Cifu device, further comprising:
listening to whether at least one participating channel set by the queue Cheng Cifu device is occupied;
transmitting a registration request to the bank Cheng Cifu via the at least one participating channel in response to the at least one participating channel being unoccupied;
the first transfer time, the second transfer time, and the first scheduling lane assigned by the rank Cheng Cifu are received from the rank Cheng Cifu machine in response to the registration request being accepted.
13. The method of claim 11, further comprising:
in response to detecting an emergency event, the emergency event is reported back through at least one emergency channel provided by the bank Cheng Cifu.
14. The method of claim 11, wherein the communication device is a leader device of a first group managed by the scheduling server, and the method further comprises:
the first data is received from another communication device in the first group and transmitted to the bank Cheng Cifu using the first scheduling channel at the first transmission time.
15. The method of claim 14, wherein prior to the step of receiving the first data from the other communication device in the first group, further comprising:
assigning a third transmission time and a second scheduling channel to the other communication device to control the other communication device to transmit the first data using the second scheduling channel at the third transmission time.
16. A communication device, comprising:
a memory circuit that stores a plurality of modules;
a transceiver;
a processor coupled to the memory circuit and the transceiver, accessing the plurality of modules to perform the steps of:
receiving the first transfer time, the second transfer time, and the first scheduling lane assigned by the bank Cheng Cifu from the bank Cheng Cifu device of claim 10;
controlling the transceiver to transmit first data to the bank Cheng Cifu using the first scheduling lane at the first transmit time;
receiving the adjusted second transfer time from the bank Cheng Cifu; and
and controlling the transceiver to transmit second data by using the first scheduling channel at the adjusted second transmission time.
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