A transmission power adaptive method suitable for scattering communication equipment

Abstract

The present invention provides a transmission power adaptation method applicable to scattering communication equipment, which relates to scattering communication. The transmission power adaptation method includes the following process: the scattering communication equipment presets a plurality of signal modes of a service rate change ratio and a corresponding baseband signal time slot transmission ratio, and determines a reference rate during initial communication; when a transmitting end device detects a change in the actual transmission service rate, it determines a signal mode that needs to be switched, and informs a receiving end device through signaling; the receiving end device receives the signal mode that needs to be switched; the transmitting end and the receiving end device switch the signal mode at the same time; and the above process is repeated to realize transmission power adaptive control. The present invention can effectively reduce the transmission power by controlling the baseband signal time slot transmission ratio, has a fast response speed to changes in service rate, and can adapt to large-scale changes in service rate without causing service data errors.

Description

Technical Field

[0001] The present invention relates to the technical field of scattering communication, and in particular to a transmission power adaptation method applicable to scattering communication equipment. Background Art

[0002] Scattering communication equipment is usually used outdoors and is powered by batteries or oil engines. In order to extend the power supply time and service life of the equipment and reduce the power consumption of the equipment, the scattering communication equipment needs to have a transmit power adaptive function. When the actual transmission service rate of the equipment becomes low or there is no service, the equipment transmit power is actively reduced without affecting the communication quality, so that the power consumption of the equipment is reduced. When the actual transmission service rate of the equipment recovers from a low service rate or no service, the transmit power can be quickly restored. The transmit power adaptive function can effectively extend the working time and service life of the equipment and improve the efficiency of equipment use.

[0003] The service rate of scattering communication equipment transmission ranges from a few kbps to tens of Mbps, and multiple signal bandwidths are used to correspond to the service rate. When the communication distance is determined, a higher transmission power is required to maintain a higher service rate. As the service rate decreases, a lower transmission power can be used to complete the transmission of service data. Therefore, different transmission powers can be used when the transmission service is different. The existing transmission power adaptive method uses direct adjustment of the device power amplifier module to control the transmission power size. When the device detects that the transmission service rate is reduced, it is necessary to simultaneously switch the device baseband module signal bandwidth to be smaller and reduce the transmission power of the device power amplifier module, so that the device signal bandwidth and transmission power are reduced at the same time. When the device transmission service rate is restored, the device baseband module signal bandwidth and the device power amplifier module transmission power are restored at the same time. The control and response time of the device switching the baseband module signal bandwidth and adjusting the device power amplifier module are relatively long. When the device transmission service rate changes greatly, the device response time lags, which is easy to cause service data errors. Summary of the invention

[0004] In view of this, the present invention provides a transmission power adaptation method suitable for scattering communication equipment, which can not only realize automatic control of transmission power, effectively reduce equipment power consumption, and extend equipment working time and service life, but also the transmission power control method has a faster response speed than the existing implementation technology. When the equipment recovers from a low business rate or no business, it can adapt to large business volume changes without easily causing business data errors.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A transmission power adaptation method applicable to a scattering communication device comprises the following steps:

[0007] Step 1, establishing a corresponding relationship between the actual service rate change ratio range and the baseband signal time slot transmission ratio in the scattering communication equipment, and presetting multiple signal modes;

[0008] Step 2: When the scattering communication device initially communicates, all baseband signal time slots are sent, and the maximum transmission service rate that can be supported when all time slots are sent is used as the reference rate;

[0009] Step 3: The sending end device detects the change ratio of the actual service rate relative to the reference rate in real time. If the change ratio is within the current signal mode range, the current state is maintained unchanged. If the change ratio enters a new ratio range, the signal mode corresponding to the changed service rate is determined, and the signal mode to be switched is notified to the receiving end device through an instruction. At the same time, the sending end device enters a state of preparing to switch the signal mode.

[0010] Step 4: After receiving the signal mode instruction to be switched, the receiving device enters a state of preparing to switch the signal mode;

[0011] Step 5: The sending device switches to the new signal mode at the beginning of the next second after sending the instruction, and the receiving device switches to the new signal mode at the beginning of the next second after receiving the instruction, and repeats steps 3 to 5.

[0012] The baseband signal adopts a burst data frame structure, and one frame includes multiple time slots. The time slot is the smallest unit for transmitting data, and the time slot is also the smallest unit for dividing transmission or non-transmission.

[0013] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0014] The present invention controls the transmission power of scattering communication equipment by controlling the time slot transmission ratio of the baseband signal in the baseband module, avoiding the operation of directly controlling the power amplifier module and switching the signal bandwidth of the baseband module. It can not only effectively reduce the transmission power but also has a fast control response speed, and can adapt to a large range of changes in the transmission rate without easily causing business data errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 is a schematic diagram of an application of a transmit power adaptive method provided by an embodiment of the present invention;

[0017] Figure 2It is a schematic diagram of the frame structure time slot transmission ratio used in a transmission power adaptation method provided in an embodiment of the present invention.

[0018] Figure 3 It is a schematic diagram of the frame structure time slot transmission ratio used in another transmission power adaptation method provided in an embodiment of the present invention.

[0019] Figure 4 It is a schematic diagram of the frame structure time slot transmission ratio used in another transmission power adaptation method provided in an embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of the frame structure time slot transmission ratio used in another transmission power adaptation method provided in an embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of the frame structure time slot transmission ratio used in another transmission power adaptation method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In the following description, specific details such as specific device structures and techniques are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below in conjunction with the accompanying drawings.

[0024] Figure 1 The present invention provides an application diagram of a transmission power adaptation method for scattering communication equipment. Figure 1 As shown, the method is applied to scattering communication equipment. When two scattering communication equipment communicate, each equipment sends and receives signals at the same time. Transmitting power adaptation refers to automatically controlling the transmitting power of the equipment, which is applicable to any scattering communication equipment in communication.

[0025] It should be noted that the present invention does not limit the structural form, application scenario, etc. of the scattering communication device. Figure 1 Only the common modules of the scattering communication device are shown, including the baseband module, the radio frequency module, the power amplifier module, and the antenna unit. In the embodiments provided by the present invention, it should be understood that the division of the modules or units is only a logical function division, and there may be other division methods in actual implementation. The present invention adopts direct control of the baseband signal time slot transmission ratio in the baseband module to achieve the control of the transmission power.

[0026] See also Figure 2 , which shows a schematic diagram of a baseband signal data frame structure of a transmission power adaptation method applicable to a scattering communication device provided by an embodiment of the present invention, and is described in detail as follows:

[0027] The baseband signal data frame is divided into multiple identical time slots. The time slot is the basic unit for transmitting data. When all time slots are sent, the transmission power is the maximum and the transmission service rate is also the maximum. When the proportion of the transmission time slot to the total time slot is reduced, the transmission power will be reduced and the transmission service rate will be reduced accordingly. The transmission power and the transmission service rate are both proportional to the time slot transmission ratio. In the embodiment of the present invention, the transmitted service data is transmitted by the physical layer according to the time slot. The length of the data frame, the length of the time slot, and the number of time slots in a frame are not limited. Similarly, when power control is performed, the position of the transmission time slot and the non-transmission time slot in the data frame is not limited. For example, the following frame structure can be used, the data frame length is 1s, the time slot length is 7.8125ms, and a frame of data has a total of 128 time slots.

[0028] A transmission power adaptation method applicable to scattering communication equipment specifically comprises the following steps:

[0029] Step 1, establishing a corresponding relationship between the actual service rate change ratio range and the baseband signal time slot transmission ratio in the scattering communication equipment, and presetting multiple signal modes;

[0030] Step 2: When the scattering communication device initially communicates, all baseband signal time slots are sent, and the maximum transmission service rate that can be supported when all time slots are sent is used as the reference rate;

[0031] Step 3: The sending end device detects the change ratio of the actual service rate relative to the reference rate in real time. If the change ratio is within the current signal mode range, the current state is maintained unchanged. If the change ratio enters a new ratio range, the signal mode corresponding to the changed service rate is determined, and the signal mode to be switched is notified to the receiving end device through an instruction. At the same time, the sending end device enters a state of preparing to switch the signal mode.

[0032] Step 4: After receiving the signal mode instruction to be switched, the receiving device enters a state of preparing to switch the signal mode;

[0033] Step 5: The sending device switches to the new signal mode at the beginning of the next second after sending the instruction, and the receiving device switches to the new signal mode at the beginning of the next second after receiving the instruction. The sending device and the receiving device complete the switching of the new signal mode at the same time; repeat steps 3 to 5.

[0034] A specific feasible method for each step is described below.

[0035] In step 1, it is necessary to preset a signal mode in the scattering communication device. The signal mode represents the correspondence between the service rate change ratio range and the time slot transmission ratio. Table 1 is an example of a signal mode table. The signal mode is represented by a serial number. For example, signal mode 1 means that when it is detected that the actual transmission service rate change ratio is within the range of 1 / 2 to 1 / 4 of the reference service rate, the corresponding time slot transmission ratio is 1 / 2, that is, only half of all time slots are transmitted. Figure 2 Only a time slot transmission schematic diagram of signal mode 0 is shown. Figure 3 Only a schematic diagram of time slot transmission of signal mode 1 is shown. Figure 4 Only a schematic diagram of time slot transmission of signal mode 2 is shown. Figure 5 Only a schematic diagram of time slot transmission of signal mode 3 is shown. Figure 6 Only one time slot transmission schematic diagram of signal mode 4 is shown. The number of preset signal modes, the range of service rate change ratios, and the corresponding relationship between time slot transmission ratios shown in Table 1 are only one feasible implementation method, and there are many possible combinations. The embodiment of the present invention does not limit the number of preset signal modes, the range of service rate change ratios, and the corresponding relationship between time slot transmission ratios.

[0036] Table 1 Signal mode table example

[0037] Signal Mode Business rate change ratio range Time slot transmission ratio 0 >1 / 2 1 1 1 / 2～1 / 4 1 / 2 2 1 / 4～1 / 8 1 / 4 3 1 / 16～1 / 32 1 / 8 4 <＝1 / 32 1 / 16

[0038] In step 2, the initial stage of power adaptation obtains the maximum transmission service rate supported when all baseband signal time slots are transmitted. For example, the rate adaptation function can be used to obtain the maximum transmission service rate that the current communication environment can support. The specific method used to obtain it is not limited by the present invention. The currently obtained maximum transmission service rate is used as the reference rate. The service rate change ratio range in Table 1 is the change ratio under the reference rate. For example, if the reference rate obtained is 2Mbps, then the actual change range of signal mode 1 is 1Mbps to 0.5Mbps.

[0039] In step 3, the sending end device detects the change ratio of the actual business rate in real time. If the business rate change ratio is within the current mode range, the current state is maintained unchanged. If the business data change ratio enters a new signal mode, the signal mode that needs to be switched is notified to the receiving end device through instructions; for example, 5 signal modes are preset in step 1, then when the actual business rate exceeds 1 / 2 of the benchmark rate, signal mode 0 is maintained unchanged; when the actual business rate is less than or equal to 1 / 32 of the benchmark rate, signal mode 4 is maintained unchanged, and other business rates can select the corresponding signal mode.

[0040] The statistics of the actual service rate adopt the average service rate of 10s. For example, the actual service rate is detected to be 0.8Mbps, and the reference rate determined in step 2 is 2Mbps. It is judged that the change rate of the actual service rate is within the range of 1 / 2 to 1 / 4, so it is necessary to use signal mode 1, that is, the transmission time slot ratio is 1 / 2. The signal mode sequence number 1 is sent to the receiving end device through signaling, and the transmitting end device enters the state of preparing to switch to signal mode 1.

[0041] In step 4, the receiving end device receives an instruction to switch the signal mode. For example, if the signal mode sequence number received by the receiving end device is 1, the receiving end device also enters a state of preparing to switch to signal mode 1.

[0042] In step 5, within the current second, the transmitting device sends a signaling for switching the signal mode, and the receiving device receives the signaling for switching the signal mode, and changes to a new frame structure form at the same time starting from the next second. For example, the transmitting device changes to signal mode 1, that is, only half of the time slot is used for transmission, and the receiving device also changes to signal mode 1 at the same time, that is, only half of the time slot is used for reception. It should be noted that in the embodiment of the present invention, the signal modes are switched at the same time starting from the next second, which is related to the structure of the data frame, that is, the switching is performed at the same time at the beginning of the next frame. For example, if the data frame length is designed to be 0.5s or 2s, then it is necessary to switch at the same time from the next 0.5s or 2s or an integer multiple thereof.

[0043] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A transmission power adaptation method for scattering communication equipment, characterized in that: The following steps are involved: Step 1, establishing a corresponding relationship between the actual service rate change ratio range and the baseband signal time slot transmission ratio in the scattering communication equipment, and presetting multiple signal modes; Step 2: When the scattering communication device initially communicates, all baseband signal time slots are sent, and the maximum transmission service rate that can be supported when all time slots are sent is used as the reference rate; Step 3: The sending end device detects the change ratio of the actual service rate relative to the reference rate in real time. If the change ratio is within the current signal mode range, the current state is maintained unchanged. If the change ratio enters a new ratio range, the signal mode corresponding to the changed service rate is determined, and the signal mode to be switched is notified to the receiving end device through an instruction. At the same time, the sending end device enters a state of preparing to switch the signal mode. Step 4: After receiving the signal mode instruction to be switched, the receiving device enters a state of preparing to switch the signal mode; Step 5: The sending device switches to the new signal mode at the beginning of the next second after sending the instruction, and the receiving device switches to the new signal mode at the beginning of the next second after receiving the instruction, and repeats steps 3 to 5.

2. A transmission power adaptation method applicable to scattering communication equipment according to claim 1, characterized in that: The baseband signal adopts a burst data frame structure. One frame includes multiple time slots. The time slot is the smallest unit for transmitting data. The time slot is also the smallest unit for dividing whether to send or not.

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