CN110720184A - TDD communication method and device - Google Patents
TDD communication method and device Download PDFInfo
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- CN110720184A CN110720184A CN201880036993.4A CN201880036993A CN110720184A CN 110720184 A CN110720184 A CN 110720184A CN 201880036993 A CN201880036993 A CN 201880036993A CN 110720184 A CN110720184 A CN 110720184A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/0063—Interference mitigation or co-ordination of multipath interference, e.g. Rake receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0647—Synchronisation among TDM nodes
- H04J3/065—Synchronisation among TDM nodes using timestamps
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The embodiment of the invention provides a TDD communication method and equipment, wherein the method comprises the following steps: acquiring the distance between a master device and a slave device which are in communication connection with the slave device; determining data transmission delay between the slave equipment and the master equipment according to the distance; and adjusting the starting time of a sending window in a data receiving and sending frame of the slave equipment forward according to the data transmission delay. In this way, under the condition that there is a data transmission delay, the starting time of the transmitting window in the data frame of the slave device for transmitting and receiving data is matched with the starting time of the receiving window of the master device for transmitting and receiving data, so that the receiving window of the data in the data frame of the master device for transmitting and receiving data sent by the slave device in the transmitting window can reach the master device under the condition that the transmitting window in the data frame of the slave device for transmitting and receiving data is not truncated, thereby improving the throughput and the resource utilization rate of the system.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a TDD communications method and apparatus.
Background
In TDD communication, because there is a transmission delay in spatial transmission of a signal, a signal sent by a slave device reaches a master device, and an excessively long transmission delay may cause a signal received by the master device in the time slot to overlap with another signal received by a base station, thereby causing inter-symbol interference.
In order to solve the problem, the master device needs to reserve a relatively long receiving window in the transceiving data frame of the master device to ensure that the data transmitted by the slave device reaches the master device in the receiving window, so that the length of the transmitting window in the transceiving data frame of the slave device is shortened, and a period of time occupied by invalid data appears in an interface window of the master device, which results in low communication efficiency and low throughput rate.
Disclosure of Invention
The embodiment of the invention provides a TDD communication method and device, which can improve the TDD communication efficiency and the system throughput rate.
In a first aspect, an embodiment of the present invention provides a TDD communication method, including:
acquiring the distance between a master device and a slave device which are in communication connection with the slave device;
determining data transmission delay between the slave equipment and the master equipment according to the distance;
and adjusting the starting time of a sending window in a data receiving and sending frame of the slave equipment forward according to the data transmission delay.
In a second aspect, an embodiment of the present invention provides a TDD communications device, including a memory and a processor;
the memory to store program instructions;
the processor, executing the program instructions stored by the memory, when executed, is configured to perform the steps of:
acquiring the distance between a master device and a slave device which are in communication connection with the slave device;
determining data transmission delay between the slave equipment and the master equipment according to the distance;
and adjusting the starting time of a sending window in a data receiving and sending frame of the slave equipment forward according to the data transmission delay.
In a third aspect, an embodiment of the present invention further provides a slave device, which includes the TDD communications device according to the second aspect.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored, and when executed by a processor, the computer program implements the TDD communication method according to the first aspect.
The TDD communication method and the device provided by the embodiment of the invention can determine the data transmission delay according to the distance between the master device and the slave device, and forward adjust the starting time of a transmitting window in a data receiving and transmitting frame of the slave device according to the data transmission delay. In this way, under the condition that there is a data transmission delay, the starting time of the transmitting window in the data frame of the slave device for transmitting and receiving data is matched with the starting time of the receiving window of the master device for transmitting and receiving data, so that the receiving window of the data in the data frame of the master device for transmitting and receiving data sent by the slave device in the transmitting window can reach the master device under the condition that the transmitting window in the data frame of the slave device for transmitting and receiving data is not truncated, thereby improving the throughput and the resource utilization rate of the system.
Drawings
Fig. 1 is a schematic structural diagram of a TDD communication system according to an embodiment of the present invention;
FIG. 2 is a diagram of TDD communication of a slave device with a master device under ideal conditions;
fig. 3 is a diagram of TDD communication between a slave device and a master device provided by the prior art;
fig. 4 is a flowchart of a TDD communication method according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a TDD communication method according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a TDD communications device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another TDD communications device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The Time Division Duplex (TDD) communication method provided in the embodiments of the present invention may be applied to a slave device, where an execution subject of the TDD communication method may be a TDD communication device included in the slave device. In the TDD communication method, the main device may be a movable platform, wherein the movable platform may include a device that moves by means of an external force or a device that moves through a self-configured power system. The slave device may include a device connected to the master device based on TDD communication, and further, the slave device may be a control terminal of the movable platform. For example, the movable platform may include a drone, an unmanned ship, an unmanned vehicle, and so forth. The control terminal of the movable platform may comprise any device that can be controlled with the movable platform, the control terminal comprising one or more of a remote control, a smartphone, a tablet, a laptop or desktop computer, and a wearable device (watch, bracelet).
In an alternative embodiment, the master device may be a control terminal of the movable platform, and the slave device may be the movable platform.
In an alternative embodiment, when the slave device is a mobile terminal (smart phone, tablet computer, intercom device, etc.) or a mobile platform, the master device may be a communication base station. In particular, the master device may include a communication base station providing network access for slave devices, for example, the master device is a cellular network communication base station (2G, 3G, or 5G communication base station).
For convenience of explanation, the control terminal with the master device being the drone and the slave device being the drone will be schematically described herein. It can be understood that the unmanned aerial vehicle of the parts described later in this document can be equivalently replaced by a master device, and the control terminal can be equivalently replaced by a slave device.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a TDD communication system according to an embodiment of the present invention, and a communication system 100 shown in fig. 1 includes an unmanned aerial vehicle 101 and a control terminal 102 of the unmanned aerial vehicle, where the control terminal 102 and the unmanned aerial vehicle 101 can implement data interaction based on a TDD communication method.
Referring to fig. 2, fig. 2 is a schematic diagram of communication between a master device and a slave device in an ideal situation. As shown, the transceiving data frame of the master device includes a transmission window TX1, a reception window RX1, and a switching time TT2R from transmission to reception of the rf device. In some embodiments, the master device may also include a measurement time slot MSR and a switching time TR2R from the reception of the rf device. Wherein the switching time TT2R from transmission to reception of the radio frequency device is the time required for the radio frequency device to switch from implementing the transmission function to implementing the reception function. The measurement time slot MSR is used for allocation of communication frequency points, radio environment measurement (for example, measurement of arrival time of a received signal), and the like. The switching time TR2R of the rf device from receiving to receiving is the time required for the rf device to switch from the receiving function to implementing the receiving function, wherein switching the rf device from the receiving function to the receiving function may also require time in some cases since the rf device may implement the receiving function under different frequency points and/or bandwidths. The transceiving data frame of the slave device includes a reception window RX2 corresponding to the transmission window TX1 of the master device and a transmission window TX2 corresponding to the reception window RX1 of the master device, and the length of the time period between the end time of the reception window RX2 and the start time of the transmission window TX2 may be Max (TR2T, TT2R + MSR + TR2R) as the time interval between the start time of the transmission window TX2 of the slave device and the end time of the reception window RX 1. Wherein the switching time TR2T from transmission to reception of the rf device is the time required for the rf device to switch from implementing the receive function to implementing the transmit function.
With continued reference to fig. 2, ideally, when there is no transmission delay between the master device and the slave device, the transmit window TX1 of the master device is aligned with the receive window RX2 of the slave device, and the receive window RX1 of the master device is aligned with the transmit window TX2 of the slave device. The slave device can transmit valid data throughout the transmission window TX2, and the master device can receive valid data transmitted from the slave device throughout the reception window RX1, so that the throughput and communication efficiency of data can be effectively improved.
Referring to fig. 3, fig. 3 is a schematic diagram of communication between a master device and a slave device in the prior art. In the prior art, because there is a data transmission delay between the master device and the slave device, in order to ensure that all data sent by the slave device in the sending window is received by the master device in the receiving window of the master device, the sending window in the data receiving and sending frame of the slave device may be truncated, that is, the length of the sending window is smaller, and the master device needs to reserve a longer receiving window in the data receiving and sending frame of the master device to ensure that the data sent by the slave device reaches the master device in the receiving window. As shown in the figure, only a part of the time period (the time period identified by the slash) in the interface window of the master device is receiving the valid data sent by the slave device in the sending window TX1 (the time period identified by the slash), and a time period I occupied by the invalid data, i.e. a guard interval GP, may occur in the interface window of the master device. Therefore, the length of the transmission window TX2 is smaller than that of the reception window RX2, and only a part of the time of the reception window RX2 can be used to receive valid data, which leads to inefficient communication, reduced throughput and wasted communication resources.
In order to solve the problem, an embodiment of the present invention provides a TDD communication method, which is applied to a slave device. Fig. 4 is a flowchart illustrating a TDD communication method according to an embodiment of the present invention, and as shown in fig. 4, the TDD communication method may include the following steps:
401. acquiring the distance between a master device and the slave device;
specifically, the executing subject of the communication method may be a TDD communication device, wherein the slave device may include the TDD communication device. The TDD communications device may obtain a distance between a slave device and a master device before determining a data transmission delay between the slave device and the master device.
Further, the obtaining the distance between the master device and the slave device which are in communication connection with the slave device comprises: and acquiring the positions of the master equipment and the slave equipment, and determining the distance according to the positions of the master equipment and the slave equipment. The TDD communications device may obtain respective locations of the master device and the slave device, and then determine a distance between the master device and the slave device according to the respective locations.
Further, the obtaining the position of the slave device comprises: and acquiring the position of the slave equipment by utilizing a positioning sensor configured on the slave equipment. Specifically, the slave device is provided with a positioning sensor, wherein the positioning sensor comprises at least one of a satellite positioning receiver (such as a GPS, a Beidou positioning receiver and the like), an inertial measurement unit and a visual positioning sensor. The TDD communications device may obtain positioning data output by the positioning sensor and determine a location of the slave device based on the positioning data.
Further, the acquiring the position of the master device includes: and acquiring the position sent by the main equipment, or acquiring the identification information of the main equipment, and sending a request to a server according to the identification information to acquire the position of the main equipment. In particular, in one embodiment, a positioning sensor is configured on the master device, wherein the positioning sensor is defined as described above. The master device can determine its own position using the positioning data output by the positioning sensor. The master device may broadcast its location, or the master device may transmit its location over a communication link with a slave device, which may obtain the location of the master device broadcast by the master device or transmitted over the communication link. In another embodiment, the TDD communications device may obtain identification information of the master device, for example, a serial number or an identification number of the master device, the TDD communications device may send a request to the server to send the request to the server, where the request includes the identification information of the master device, and after receiving the request, the server queries a location of the master device according to the identification information of the master device in the request and sends the location of the master device to the TDD communications device.
402. Determining data transmission delay between the slave equipment and the master equipment according to the distance;
specifically, after the TDD communication device determines the distance between the slave device and the master device, the TDD communication device may determine the data transmission delay between the slave device and the master device according to the distance. For example, after determining the distance D between the slave device and the master device, the data transmission delay TS is calculated from the distance D, for example, TS — D/v, where v is the propagation speed of the wireless signal, and v is typically the velocity v — 3 × 108 of light in vacuum. When the distance D is 1Km, the data transmission delay TS is 3.33 microseconds.
403. And adjusting the starting time of a transmitting window in a data frame transmitted and received by the slave equipment according to the data transmission delay.
Specifically, after acquiring the data transmission delay, the TDD communications device may adjust a start time of a transmission window in a data frame received and transmitted by the slave device according to the data transmission delay. The start time of the transmission window in the transceiving data frame may have a reference start time, where the reference start time is the start time of the reception window in the transceiving data frame of the master device as shown in fig. 2 or 3, and the TDD device may forward adjust the start time of the transmission window in the transceiving data frame of the slave device according to the data transmission delay based on the reference start time.
The TDD communication method and the device provided by the embodiment of the invention can determine the data transmission delay according to the distance between the master device and the slave device, and forward adjust the starting time of a transmitting window in a data receiving and transmitting frame of the slave device according to the data transmission delay. In this way, under the condition that there is a data transmission delay, the starting time of the transmitting window in the data frame of the slave device for transmitting and receiving data is matched with the starting time of the receiving window of the master device for transmitting and receiving data, so that the receiving window of the data in the data frame of the master device for transmitting and receiving data sent by the slave device in the transmitting window can reach the master device under the condition that the transmitting window in the data frame of the slave device for transmitting and receiving data is not truncated, thereby improving the throughput and the resource utilization rate of the system.
In an optional implementation, the adjusting, by the slave device, the start time of the transmission window in the transceiving data frame of the slave device according to the data transmission delay may include:
s4031, acquiring a reference starting time of a sending window in a data frame to be received and sent, wherein the reference starting time is the same as the starting time of a receiving window in the data frame to be received and sent of the main device;
s4032, forward adjusting the reference starting time according to the data transmission delay to obtain a target starting time;
s4033, adjusting a start time of a transmission window in the transceiving data frame to the target start time, wherein the forward adjustment time amount is determined by the data transmission delay.
Specifically, before adjusting the start time of the transmission window in the transceiving data frame of the slave device, the TDD communications device may obtain a reference start time of the transmission window in the transceiving data frame of the slave device, where the reference start time is defined as described above. As shown in fig. 5, the TDD communications device may determine a forward adjustment time TA according to the data transmission delay, and obtain a target start time of a transmission window in a transceiving data frame of the slave device according to the forward adjustment time TA and the reference start time, for example, the target start time is a start time obtained after the reference start time is adjusted forward by the TA. And after the target starting time is obtained, adjusting the starting time of the sending window in the transceiving data frame to the target starting time.
In an alternative embodiment, the forward adjustment time amount TA may be the data transmission delay TS. It is understood that the forward adjustment time amount TA may also be determined according to the data transmission delay in other manners, for example, the forward adjustment time amount TA may be 0.8, 0.9, 1.1, or 1.2 times the data transmission delay TS, and so on, and is not limited in particular.
In an optional implementation manner, the length of the transmission window in the transceiving data frame of the slave device is equal to the length of the reception window in the transceiving data frame of the master device.
Specifically, with continued reference to fig. 5, when the forward adjustment time amount TA may be the data transmission delay TS, the data transmitted by the slave at the target start time of the transmission window reaches the master at the start time in the transceiving data frame of the master, and the transmission timing of the slave and the reception timing of the master are in a corresponding state. In the aligned state, the transmission window in the transceiving data frame of the slave device may not be truncated, the length of the transmission window in the transceiving data frame of the slave device is the length of the reception window in the transceiving data frame of the master device, the slave device may transmit valid data in the entire transmission window TX2, and the master device may receive the valid data transmitted by the slave device in the entire reception window RX1, so that the throughput rate and the communication efficiency of data may be effectively improved.
In an optional implementation manner, the TDD communication method provided in the embodiment of the present invention may further include: and determining the time difference between the target starting time and the end time of a receiving window in the data frame transceiving of the slave equipment. In this case, the adjusting the start time of the transmission window in the transceiving data frame to the target start time includes: and when the time difference is greater than or equal to the switching time of the radio frequency part from receiving to sending, adjusting the starting time of the sending window in the transceiving data frame to the target starting time.
Specifically, after acquiring the target start time, the TDD communications device may determine a time difference between the target start time and an end time of a receive window in a data frame received and transmitted by the slave device. And the radio frequency device of the slave equipment at least completes the switching from the receiving function to the transmitting function in the time period between the target starting time and the ending time of the receiving window in the data frame transceiving of the slave equipment. Therefore, the temperature of the molten metal is controlled,
when the time difference is smaller than the switching time of the radio frequency device from receiving to transmitting, the radio frequency device cannot realize switching from a receiving function to a transmitting function, and the TDD communication equipment does not adjust the starting time of the transmitting window in the transceiving data frame to the target starting time. When the switching time of the radio frequency part from receiving to transmitting is greater than or equal to the switching time of the radio frequency part from receiving to transmitting, at least the radio frequency part can be ensured to realize the switching from the receiving function to the transmitting function, and at the moment, the starting time of the transmitting window in the transceiving data frame can be adjusted to the target starting time.
In an optional implementation manner, the TDD communication method provided in the embodiment of the present invention further includes: determining whether the data transmission delay is greater than or equal to a preset delay threshold; the adjusting the start time of the transmission window in the data frame received and transmitted by the slave device forward according to the data transmission delay includes: and when the data transmission delay is greater than or equal to a preset delay threshold, the starting time of a sending window in a data receiving and sending frame of the slave equipment is adjusted forwards according to the data transmission delay.
Specifically, after the TDD communications device obtains the data transmission delay, it may further determine whether the data transmission delay is greater than or equal to a preset delay threshold. When the data transmission delay is greater than or equal to the preset delay threshold, it may be considered that the current data transmission delay is relatively large, the efficiency and throughput rate of communication between the current slave device and the master device are not high, and the TDD communications device adjusts the start time of the transmission window in the data frame received and transmitted by the slave device forward according to the data transmission delay, where please refer to step S4031-S4033 and the explanation portion of fig. 5 for a specific method for adjusting the start time of the transmission window in the data frame received and transmitted by the slave device forward according to the data transmission delay. When it is determined that the data transmission delay is smaller than the preset delay threshold, it may be considered that the efficiency and throughput rate of communication between the current slave device and the master device are not high, and the TDD communication device may not adjust the start time of the transmission window in the data frame received and transmitted by the slave device forward according to the data transmission delay.
In an optional implementation, the adjusting forward the start time of the transmission window in the transceiving data frame of the slave device according to the data transmission delay includes: and when the slave equipment starts to establish communication connection with the master equipment, the starting time of a sending window in a data receiving and sending frame of the slave equipment is adjusted forwards according to the data transmission delay.
Specifically, in the related art, during the communication between the slave device and the master device, the master device may measure the arrival time of the signal transmitted by the slave device in real time, the master device may determine a forward adjustment time amount according to the measured arrival time, and periodically transmit the forward adjustment time amount to the slave device, and the slave device may forward adjust the start time of the transmission window in the transceiving data frame of the slave device according to the forward adjustment time amount. However, when the slave device starts establishing a communication connection with the master device, the master device and the slave device have not constituted a communication loop yet, and therefore the master device cannot transmit the forward adjustment amount of time to the slave device. Therefore, when the slave device starts to establish a communication connection with the master device, the TDD communications device may obtain a distance between the master device and the slave device in communication connection with the slave device according to the method described above, determine a data transmission delay between the slave device and the master device according to the distance, and forward adjust a start time of a transmission window in a data frame received and transmitted by the slave device according to the data transmission delay, where please refer to steps S4031-S4033 and the explanation portion of fig. 5 for a specific method for forward adjusting the start time of the transmission window in the data frame received and transmitted by the slave device according to the data transmission delay.
Further, the TDD communication method provided in the embodiment of the present invention further includes: after the slave device establishes communication connection with the master device, the forward adjustment time quantity transmitted by the master device is obtained, and the starting time of a transmitting window in a transceiving data frame of the slave device is adjusted forward according to the forward adjustment time quantity.
Specifically, after determining that the slave device establishes a communication connection with the master device, the TDD communication device may receive a forward adjustment time amount sent by the master device, and during subsequent communication between the slave device and the master device, the TDD communication device may forward adjust a start time of a transmission window in a transceiving data frame of the slave device according to the forward adjustment time amount sent by the master device.
As can be seen from the TDD communication method shown in fig. 4 and the optional implementation manner, in this embodiment, the slave device uses the position of the master device and the slave device to reduce the duration of invalid data in the receiving window of the master device, so that the resource utilization rate is improved, that is, the system throughput is improved.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a TDD communications device according to an embodiment of the present invention, where the TDD communications device includes the following units:
an obtaining unit 601, configured to obtain a distance between a master device and a slave device that are communicatively connected to the slave device;
a determining unit 602, configured to determine, according to the distance, a data transmission delay between the slave device and a master device;
an adjusting unit 603, configured to adjust a start time of a transmission window in a data frame received and transmitted by the slave device forward according to the data transmission delay.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a TDD communications device according to an embodiment of the present invention, and as shown in fig. 7, the TDD communications device may include a processor 701, a memory 702, and a communications interface 703, where the communications interface 703 is used for communicating with a master device, and the TDD communications device may be disposed in a slave device.
The memory 702 may include a volatile memory (volatile memory); the memory 702 may also include a non-volatile memory (non-volatile memory); the memory 702 may also comprise a combination of the above types of memory. The processor 702 may be a Central Processing Unit (CPU). The processor 702 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), or any combination thereof.
Optionally, the memory 702 is used to store program instructions. The processor 701 may call program instructions stored in the memory 702 for performing the following steps:
acquiring the distance between a master device and a slave device which are in communication connection with the slave device;
determining data transmission delay between the slave equipment and the master equipment according to the distance;
and adjusting the starting time of a sending window in a data receiving and sending frame of the slave equipment forward according to the data transmission delay.
In an optional implementation manner, when the processor 701 adjusts the start time of a transmission window in a data frame received and transmitted by the slave device forward according to the data transmission delay, specifically, the processor is configured to:
acquiring a reference starting time of a sending window in the transceiving data frame, wherein the reference starting time is the same as the starting time of a receiving window in the transceiving data frame of the main equipment;
and adjusting the reference starting time forwards according to the data transmission delay to obtain a target starting time, and adjusting the starting time of a sending window in the transceiving data frame to the target starting time, wherein the forward adjustment time is determined by the data transmission delay.
In an alternative embodiment, the forward adjustment amount of time is the data transmission delay.
In an optional embodiment, the processor 701 is further configured to determine a time difference between the target start time and an end time of a receiving window in a transceiving data frame of the slave device;
when the processor 701 adjusts the starting time of the transmission window in the transceiving data frame to the target starting time, specifically, the processor is configured to:
and when the time difference is greater than or equal to the switching time of the radio frequency part from receiving to sending, adjusting the starting time of the sending window in the transceiving data frame to the target starting time.
In an optional embodiment, the processor 701 is further configured to determine whether the data transmission delay is greater than or equal to a preset delay threshold;
when the processor 701 adjusts the start time of the transmission window in the data frame received and transmitted by the slave device forward according to the data transmission delay, the processor is specifically configured to:
and when the data transmission delay is greater than or equal to a preset delay threshold, the starting time of a sending window in a data receiving and sending frame of the slave equipment is adjusted forwards according to the data transmission delay.
In an optional implementation manner, when the processor 701 adjusts the start time of a transmission window in a data frame received and transmitted by the slave device forward according to the data transmission delay, specifically, the processor is configured to:
and when the slave equipment starts to establish communication connection with the master equipment, the starting time of a sending window in a data receiving and sending frame of the slave equipment is adjusted forwards according to the data transmission delay.
In an optional implementation, the processor 701 is further configured to: after the slave device establishes communication connection with the master device, the forward adjustment time quantity transmitted by the master device is obtained, and the starting time of a transmitting window in a transceiving data frame of the slave device is adjusted forward according to the forward adjustment time quantity.
In an optional implementation manner, the length of the transmission window in the transceiving data frame is the length of the reception window in the transceiving data frame of the master device.
In an optional implementation manner, when the processor 701 acquires a distance between a master device and the slave device, which are in communication connection with the slave device, the processor is specifically configured to:
and acquiring the positions of the master equipment and the slave equipment, and determining the distance according to the positions of the master equipment and the slave equipment.
In an optional implementation manner, when the processor 701 acquires the location of the slave device, it is specifically configured to:
and acquiring the position of the slave equipment by utilizing a positioning sensor configured on the slave equipment.
In an optional implementation manner, when the processor 701 acquires the location of the master device, it is specifically configured to:
obtain the position sent by the master device, or
And acquiring the identification information of the main equipment, and sending a request to a server according to the identification information to acquire the position of the main equipment.
In an optional embodiment, the slave device is a movable platform, and the master device is a control terminal of the movable platform.
In an optional embodiment, the slave device is a control terminal of a movable platform, and the master device is the movable platform.
In an optional implementation manner, the slave device is a mobile terminal or a movable platform, and the master device is a communication base station.
In an alternative embodiment, the communication base station is a cellular network communication base station.
In the embodiment of the invention, the TDD communication equipment can determine the data transmission delay based on the distance between the master equipment and the slave equipment, and adjust the starting time of the sending window of the slave equipment based on the data transmission delay so as to be matched with the receiving window of the master equipment, thereby improving the communication efficiency and the throughput rate.
In an embodiment of the present invention, a computer-readable storage medium is further provided, where the computer-readable storage medium stores a computer program, and the computer program, when executed by a processor, implements the TDD communication method described in the embodiment corresponding to fig. 4 in the present invention, and details of the implementation are not repeated herein.
In an embodiment of the present invention, a computer-readable storage medium is further provided, where the computer-readable storage medium stores a computer program, and the computer program, when executed by a processor, implements the TDD communication method described in the embodiment corresponding to fig. 4 in the present invention, and details of the implementation are not repeated herein.
The computer readable storage medium may be an internal storage unit of the device according to any of the foregoing embodiments, for example, a hard disk or a memory of the device. The computer readable storage medium may also be an external storage device of the device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the device. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the apparatus. The computer-readable storage medium is used for storing the computer program and other programs and data required by the terminal. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output.
The embodiment of the present invention further provides a slave device, which includes the TDD communications device shown in fig. 6 or 7.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It is obvious to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working process of the device described above, reference may be made to the corresponding process in the foregoing method embodiment, which is not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (31)
1. A TDD communications method, comprising:
acquiring the distance between a master device and a slave device which are in communication connection with the slave device;
determining data transmission delay between the slave equipment and the master equipment according to the distance;
and adjusting the starting time of a sending window in a data receiving and sending frame of the slave equipment forward according to the data transmission delay.
2. The method of claim 1,
the adjusting the start time of the transmission window in the data frame received and transmitted by the slave device forward according to the data transmission delay includes:
acquiring a reference starting time of a sending window in the transceiving data frame, wherein the reference starting time is the same as the starting time of a receiving window in the transceiving data frame of the main equipment;
and adjusting the reference starting time forwards according to the data transmission delay to obtain a target starting time, and adjusting the starting time of a sending window in the transceiving data frame to the target starting time, wherein the forward adjustment time is determined by the data transmission delay.
3. The method of claim 2, wherein the forward adjustment amount of time is the data transmission delay.
4. A method according to claim 2 or 3, characterized in that the method further comprises:
determining a time difference value between the target starting time and the end time of a receiving window in a data frame transmitted and received by the slave device;
the adjusting the start time of the transmission window in the transceiving data frame to the target start time includes:
and when the time difference is greater than or equal to the switching time of the radio frequency part from receiving to sending, adjusting the starting time of the sending window in the transceiving data frame to the target starting time.
5. The method according to any one of claims 1-4, further comprising: determining whether the data transmission delay is greater than or equal to a preset delay threshold;
the adjusting the start time of the transmission window in the data frame received and transmitted by the slave device forward according to the data transmission delay includes:
and when the data transmission delay is greater than or equal to a preset delay threshold, the starting time of a sending window in a data receiving and sending frame of the slave equipment is adjusted forwards according to the data transmission delay.
6. The method according to any one of claims 1 to 5,
the adjusting the start time of the transmission window in the data frame received and transmitted by the slave device forward according to the data transmission delay includes:
and when the slave equipment starts to establish communication connection with the master equipment, the starting time of a sending window in a data receiving and sending frame of the slave equipment is adjusted forwards according to the data transmission delay.
7. The method of claim 6, further comprising:
after the slave device establishes communication connection with the master device, the forward adjustment time quantity transmitted by the master device is obtained, and the starting time of a transmitting window in a transceiving data frame of the slave device is adjusted forward according to the forward adjustment time quantity.
8. The method of claim 3, wherein a length of a transmission window in the transceiving data frame is a length of a reception window in the transceiving data frame of the master device.
9. The method according to any one of claims 1-8, wherein the obtaining the distance between the master device and the slave device communicatively connected to the slave device comprises:
and acquiring the positions of the master equipment and the slave equipment, and determining the distance according to the positions of the master equipment and the slave equipment.
10. The method of claim 9,
the obtaining the position of the slave device comprises:
and acquiring the position of the slave equipment by utilizing a positioning sensor configured on the slave equipment.
11. The method of claim 9,
the acquiring the position of the master device comprises:
obtain the position sent by the master device, or
And acquiring the identification information of the main equipment, and sending a request to a server according to the identification information to acquire the position of the main equipment.
12. The method according to any one of claims 1-11, wherein the slave device is a movable platform and the master device is a control terminal of the movable platform.
13. The method according to any of claims 1-11, wherein the slave device is a control terminal of a movable platform and the master device is the movable platform.
14. The method according to any of claims 1-11, wherein the slave device is a mobile terminal or a movable platform and the master device is a communication base station.
15. The method of claim 14, wherein the communication base station is a cellular network communication base station.
16. A TDD communications device comprising a memory and a processor;
the memory to store program instructions;
the processor, executing the program instructions stored by the memory, when executed, is configured to perform the steps of:
acquiring the distance between a master device and a slave device which are in communication connection with the slave device;
determining data transmission delay between the slave equipment and the master equipment according to the distance;
and adjusting the starting time of a sending window in a data receiving and sending frame of the slave equipment forward according to the data transmission delay.
17. The device according to claim 16, wherein when the processor adjusts the start time of the transmission window in the data frame received and transmitted by the slave device forward according to the data transmission delay, the processor is specifically configured to:
acquiring a reference starting time of a sending window in the transceiving data frame, wherein the reference starting time is the same as the starting time of a receiving window in the transceiving data frame of the main equipment;
and adjusting the reference starting time forwards according to the data transmission delay to obtain a target starting time, and adjusting the starting time of a sending window in the transceiving data frame to the target starting time, wherein the forward adjustment time is determined by the data transmission delay.
18. The apparatus of claim 17, wherein the forward adjustment amount of time is the data transmission delay.
19. The device of claim 17 or 18, wherein the processor is further configured to determine a time difference between the target start time and an end time of a receive window in a transceiving data frame of the slave device;
the processor is specifically configured to, when adjusting the starting time of the transmission window in the transceiving data frame to the target starting time:
and when the time difference is greater than or equal to the switching time of the radio frequency part from receiving to sending, adjusting the starting time of the sending window in the transceiving data frame to the target starting time.
20. The device of any of claims 16-19, wherein the processor is further configured to determine whether the data transmission delay is greater than or equal to a preset delay threshold;
the processor is specifically configured to, when the processor adjusts the start time of the transmission window in the data frame received and transmitted by the slave device forward according to the data transmission delay:
and when the data transmission delay is greater than or equal to a preset delay threshold, the starting time of a sending window in a data receiving and sending frame of the slave equipment is adjusted forwards according to the data transmission delay.
21. The apparatus according to any one of claims 16 to 20,
the processor is specifically configured to, when the processor adjusts the start time of the transmission window in the data frame received and transmitted by the slave device forward according to the data transmission delay:
and when the slave equipment starts to establish communication connection with the master equipment, the starting time of a sending window in a data receiving and sending frame of the slave equipment is adjusted forwards according to the data transmission delay.
22. The device of claim 21, wherein the processor is further configured to:
after the slave device establishes communication connection with the master device, the forward adjustment time quantity transmitted by the master device is obtained, and the starting time of a transmitting window in a transceiving data frame of the slave device is adjusted forward according to the forward adjustment time quantity.
23. The device of claim 18, wherein a length of a transmission window in the transceiving data frame is equal to a length of a reception window in the transceiving data frame of the master device.
24. The device according to any of claims 16 to 23, wherein the processor, when obtaining the distance between the master device communicatively connected to the slave device and the slave device, is configured to:
and acquiring the positions of the master equipment and the slave equipment, and determining the distance according to the positions of the master equipment and the slave equipment.
25. The apparatus of claim 24,
when the processor acquires the location of the slave device, the processor is specifically configured to:
and acquiring the position of the slave equipment by utilizing a positioning sensor configured on the slave equipment.
26. The apparatus of claim 24,
when the processor acquires the position of the master device, the processor is specifically configured to:
obtain the position sent by the master device, or
And acquiring the identification information of the main equipment, and sending a request to a server according to the identification information to acquire the position of the main equipment.
27. The device of any of claims 16-26, wherein the slave device is a movable platform and the master device is a control terminal of the movable platform.
28. The device of any of claims 16-26, wherein the slave device is a control terminal of a movable platform and the master device is the movable platform.
29. The device according to any of claims 16-26, wherein the slave device is a mobile terminal or a movable platform and the master device is a communication base station.
30. The apparatus of claim 29, wherein the communication base station is a cellular network communication base station.
31. A slave device, characterized in that it comprises a TDD communications device according to any of claims 16-30.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/103009 WO2020042017A1 (en) | 2018-08-29 | 2018-08-29 | Tdd communication method and device |
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| CN110720184A true CN110720184A (en) | 2020-01-21 |
| CN110720184B CN110720184B (en) | 2021-03-26 |
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| WO (1) | WO2020042017A1 (en) |
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| WO2020042017A1 (en) | 2020-03-05 |
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