WO2021077324A1

WO2021077324A1 - Data transmission method and related device

Info

Publication number: WO2021077324A1
Application number: PCT/CN2019/112745
Authority: WO
Inventors: 李凌鹏; 王鹏; 蒋亚军
Original assignee: 华为技术有限公司
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2021-04-29

Abstract

Disclosed is a data transmission method used in a scenario for avoiding a radar signal under an unlicensed band. The method is used for enabling a network device to avoid a frequency point of the radar signal during the transmission of downlink data, and can also ensure the downlink data transmission efficiency, thereby avoiding the interruption of downlink data transmission. The method in the embodiments of the present application comprises: a network device using a first frame format to send downlink data; when the network device detects at least one discrete pulse signal within a first time window, the network device switching the frame format for sending the downlink data from the first frame format to a second frame format, wherein the second frame format is used for detecting a radar signal; and when the network device detects the radar signal within a second time window, the network device switching a frequency point for sending the downlink data, wherein the second time window is used for indicating a time range for detecting the radar signal.

Description

Data transmission method and related equipment

Technical field

The embodiments of the present application relate to the field of communications, and in particular, to a data transmission method and related equipment.

Background technique

5.25～5.35GHz and 5.47～5.725GHz are the working frequency bands of the global radar system. In order to avoid the interference of the wireless communication equipment working in the 5GHz frequency band to the radar system, in addition to the power, frequency spectrum and other items of the wireless communication equipment, certain requirements are put forward. In addition, requirements for dynamic frequency selection (DFS) characteristics have also been increased. For example, in the process of detecting radar signals using the LTE fixed frame format, in order to ensure that the probability of the communication device detecting the radar signal is greater than 60%, the number of uplink subframes in the LTE fixed frame format is required to be greater than the number of downlink subframes.

In this regard, in the prior art, a frame format in which the number of uplink subframes is greater than the number of downlink subframes is used to transmit service data to meet the requirements for detecting radar signals.

However, such a solution reduces the downlink throughput of wireless communication equipment. When the wireless communication device mainly transmits downlink services, the aforementioned fixed frame format will not be able to meet the throughput requirement of data transmission, thereby reducing the data transmission efficiency and affecting the user's data transmission experience.

Summary of the invention

The embodiments of the present application provide a data transmission method, which is used to enable a network device to avoid the frequency of radar signals when transmitting downlink data, and to ensure the efficiency of downlink data transmission, thereby avoiding interruption of downlink data transmission.

In the first aspect, an embodiment of the present application provides a data transmission method. In this method, a network device uses a first frame format to transmit downlink data, and when the network device uses the first frame format to transmit downlink data, the The network equipment will also detect whether there is a discrete pulse signal while receiving the uplink data. When the network device detects at least one discrete pulse signal in the first time window, the network device switches the frame format for sending the downlink data from the first frame format to the second frame format, wherein the second frame format Used to detect radar signals. When the network device detects the radar signal in the second time window, the network device will switch the frequency of sending the downlink data, where the second time window is used to indicate the time range for detecting the radar signal.

In this embodiment of the application, the network device is configured with a second frame format for detecting radar signals. The network device uses the first frame format to send downlink data, receives uplink data, and detects discrete pulse signals, and when at least one discrete pulse signal is detected, it switches to the second frame format to detect radar signals. Since the network device uses different frame formats to send downlink data and detect radar signals, the configuration of the first frame format and the second frame format can be more flexible, and the network device can ensure the success rate of radar signal detection at the same time. Improve the downlink throughput rate, which in turn can improve the data transmission efficiency.

According to the first aspect, in the first implementation manner of the first aspect of the embodiments of the present application, the method further includes: when the network device does not detect a radar signal within the second time window, the network device sends the downlink The frame format of the data is switched from the second frame format to the first frame format.

In this embodiment, because the network device does not detect the radar signal in the second time window, the network device switches the frame format for sending the downlink data from the second frame format to the first frame format to Improve the downstream throughput rate. In such an implementation manner, it is advantageous for the network device to switch the frame format according to the actual detection result to meet the requirement of detecting radar signals or meeting the requirement of sending downlink data. It is beneficial for the network equipment to ensure the success rate of radar signal detection while increasing the downlink throughput rate, thereby increasing the efficiency of data transmission.

According to the first aspect or the first implementation manner of the first aspect, in a second implementation manner of the first aspect of the embodiments of the present application, the radar signal includes a plurality of radar pulses, and the duration indicated by the second time window is greater than two The period of this radar pulse.

In this embodiment, the second time window and the period of the radar pulse are proposed, which is beneficial for the network device to detect a radar pulse with a complete period in the second time window, which is beneficial to improve the detection of the radar signal by the network device. The accuracy rate.

According to any one of the first aspect, the first implementation manner of the first aspect to the second implementation manner of the first aspect, in the third implementation manner of the first aspect of the embodiments of the present application, the second The duration indicated by the time window is an integer multiple of the period of the second frame format.

In this embodiment, it is proposed that the duration indicated by the second time window is an integer multiple of the period of the second frame format, which is beneficial for the network device to determine the second frame format, so that the first format and the second frame format are in time It can be connected smoothly.

According to the first aspect, the first implementation manner of the first aspect to the third implementation manner of the first aspect, in the fourth implementation manner of the first aspect of the embodiments of the present application, the second The duration indicated by the time window is greater than the duration indicated by the first time window.

In this embodiment, the relationship between the first time window and the second time window is proposed. Since the radar signal is a continuous periodic pulse signal rather than a discrete pulse signal, the window length of the second time window for detecting the radar signal should be greater than the window length of the first time window, which is beneficial to improve the detection of the network equipment To the accuracy of the radar signal.

According to any one of the first aspect, the first implementation manner of the first aspect to the fourth implementation manner of the first aspect, in the fifth implementation manner of the first aspect of the embodiments of the present application, the network device Before switching the frequency of sending the downlink data, the method further includes: when the network device detects that there are multiple periodic pulse signals in the second time window, the network device determines that the network device detects the Radar signal.

In this embodiment, a way to determine whether the signal checked by the network device is a radar signal is proposed.

According to any one of the first aspect, the first implementation manner of the first aspect to the fifth implementation manner of the first aspect, in the sixth implementation manner of the first aspect of the embodiments of the present application, the first The number of uplink subframes in the frame format is less than the number of downlink subframes, and the number of uplink subframes in the second frame format is greater than the number of downlink subframes.

In this embodiment, since the uplink subframes in the second frame format are mainly used for receiving signals, it is advantageous to detect radar signals when the number of uplink subframes is large. Therefore, the network device uses the second subframe to detect the radar signal to ensure the accuracy of detecting the radar signal. In addition, in the first frame format, the downlink subframe is mainly used to send downlink data to the terminal device. Therefore, when the number of downlink subframes is large, it is beneficial for the network device to send downlink data and ensure the downlink throughput rate.

According to the first aspect, the first implementation manner of the first aspect to the sixth implementation manner of the first aspect, in the seventh implementation manner of the first aspect of the embodiments of the present application, the first The frame format includes: sub-frame ratio SA2 frame format.

According to any one of the first aspect, the first implementation manner of the first aspect to the seventh implementation manner of the first aspect, in the eighth implementation manner of the first aspect of the embodiments of the present application, the second The frame format includes: the subframe ratio SA0 frame format; or, the combination of the discontinuous reception DRX frame format and the SA2 frame format.

In the second aspect, an embodiment of the present application provides a communication device, including: a transceiver module and a processing module. Wherein, the transceiver module is used to send downlink data in the first frame format. The processing module is configured to switch the frame format for sending the downlink data from the first frame format to the second frame format when the network device detects at least one discrete pulse signal within the first time window. The processing module is also used for when the network device detects the radar signal in the second time window, the network device will switch the frequency of sending the downlink data.

It should be understood that the foregoing second frame format is used to detect radar signals, and the foregoing second time window is used to indicate the time range of detecting radar signals.

According to the second aspect, in the first implementation manner of the second aspect of the embodiments of the present application, the processing module is further configured to send the downlink data when the network device does not detect a radar signal within the second time window The frame format of is switched from the second frame format to the first frame format.

According to the second aspect or the first implementation manner of the second aspect, in the second implementation manner of the second aspect of the embodiments of the present application, the radar signal includes a plurality of radar pulses, and the duration indicated by the second time window is greater than two The period of this radar pulse.

According to any one of the second aspect, the first implementation manner of the second aspect to the second implementation manner of the second aspect, in the third implementation manner of the second aspect of the embodiments of the present application, the second The duration indicated by the time window is an integer multiple of the period of the second frame format.

According to the second aspect, the first implementation manner of the second aspect to the third implementation manner of the second aspect, in the fourth implementation manner of the second aspect of the embodiments of the present application, the second The duration indicated by the time window is greater than the duration indicated by the first time window.

According to the second aspect, the first implementation manner of the second aspect to the fourth implementation manner of the second aspect, in the fifth implementation manner of the second aspect of the embodiments of the present application, the processing module And is also used to determine that the radar signal is detected within the second time window when the network device detects that there are multiple periodic pulse signals in the second time window.

According to any one of the second aspect, the first implementation manner of the second aspect to the fifth implementation manner of the second aspect, in the sixth implementation manner of the second aspect of the embodiments of the present application, the first The number of uplink subframes in the frame format is less than the number of downlink subframes, and the number of uplink subframes in the second frame format is greater than the number of downlink subframes.

According to any one of the second aspect, the first implementation manner of the second aspect to the sixth implementation manner of the second aspect, in the seventh implementation manner of the second aspect of the embodiments of the present application, the first The frame format includes: sub-frame ratio SA2 frame format.

According to the second aspect, the first implementation manner of the second aspect to the seventh implementation manner of the second aspect, in the eighth implementation manner of the second aspect of the embodiments of the present application, the second The frame format includes: the subframe ratio SA0 frame format; or, the combination of the discontinuous reception DRX frame format and the SA2 frame format.

In the third aspect, the embodiments of the present application provide a communication device. The communication device may be a network device or a chip in the network device. The communication device may include a processing module and a transceiver module. When the communication device is a network device, the processing module may be a processor, the transceiver module may be a transceiver; the network device may also include a storage module, and the storage module may be a memory; the storage module is used to store instructions, the The processing module executes the instructions stored in the storage module, so that the network device executes the first aspect or the method in any one of the implementation manners of the first aspect. When the communication device is a chip in a network device, the processing module may be a processor, and the transceiver module may be an input/output interface, a pin or a circuit, etc.; the processing module executes the instructions stored in the storage module to make the The network device executes the method in the first aspect or any one of the implementations of the first aspect, and the storage module may be a storage module (for example, a register, a cache, etc.) in the chip, or a storage module located in the network device. A memory module external to the chip (for example, read-only memory, random access memory, etc.).

In a fourth aspect, the present application provides a communication device, which may be an integrated circuit chip, which is used to implement the functions of the aforementioned network device.

In the fifth aspect, the embodiments of the present application provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the method described in the foregoing first aspect and any one of the implementation manners in the first aspect .

In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, including instructions, when the instructions are run on a computer, so that the computer executes as described in the foregoing first aspect and any one of the implementation manners in the first aspect. The method of introduction.

In a seventh aspect, the present application provides a chip system including a processor for supporting communication devices to implement the functions involved in the above aspects, for example, sending or processing data and/or information involved in the above methods . In a possible design, the chip system further includes a memory, and the memory is used to store program instructions and data necessary for the communication device. The chip system may include chips, or chips and other discrete devices.

It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

Description of the drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application.

FIG. 1 is an application scenario diagram of the data transmission method in an embodiment of this application;

Figure 2 is a flowchart of a data transmission method in an embodiment of the application;

FIG. 3 is a schematic diagram of an embodiment of a communication device in an embodiment of the application;

Fig. 4 is a schematic diagram of another embodiment of a communication device in an embodiment of this application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, without having to use To describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in a sequence other than the content illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

The following first introduces the system architecture and application scenarios of the data transmission method proposed in the embodiments of the present application:

The solution proposed in the embodiments of this application can be used in an unlicense-free frequency band point-to-point or point-to-multipoint communication system. Specifically, it can be applied to wireless communication devices that require radar signal detection and avoidance, for example, 5GHz is used. Frequency band terminal equipment or network equipment using the 5GHz frequency band.

Based on the above system, the application scenario to which the embodiment of this application is adapted is shown in Figure 1. The application scenario includes: a network device 101, a terminal device 102, and a radar system 103. The network device 101 can use a preset frequency band resource direction. The terminal device 102 transmits downlink data. However, the radar system 103 will also occupy a part of the frequency band resources during operation. In order to avoid conflicts between the frequency band resources occupied by the data transmission between the network device 101 and the terminal device 102 and the frequency band resources of the radar system, this application can be used for implementation. The solution proposed in the example is to avoid the frequency of the radar signal by changing the frequency of the transmission resource of the network device 101 at an appropriate time.

In addition, the solutions proposed in the embodiments of the present application can also be applied to data transmission scenarios between the network device 101 and other network devices, and the specifics are not limited here.

It should be understood that the network device 101 in the embodiment of this application may be a radio access network (RAN) device, for example, a base station or an access point; it may also refer to an access network on the air interface. A device that communicates with wireless terminal devices through one or more cells. The network device 101 can be used to convert received air frames and Internet protocol (IP) packets to each other, and serve as a router between the terminal device and the rest of the access network, where the rest of the access network can include IP network. The network device 101 can also coordinate the attribute management of the air interface. For example, the network device 101 may include an evolved base station (evolutional node B, NodeB or eNB or e-NodeB) in a long term evolution (LTE) system or an evolved LTE system (long term evolution advanced, LTE-A). , The next generation node B (gNB) in the new radio (NR) system or may also include the centralized unit (CU) and distributed unit in the Cloud RAN system A distributed unit (DU) is not limited in the embodiment of the present application.

In addition, when the aforementioned network device 101 performs data transmission with other network devices, the aforementioned network device 101 may also be a wireless network backhaul device (radio backhaul), which is specifically used between the base station and the base station from the remote site to the central site. Communication. The aforementioned network equipment may also be an integrated access and backhaul (IAB) base station, which is not specifically limited here.

It should be understood that the network device 101 in the embodiment of the present application may be any of the above-mentioned devices or chips, which is not specifically limited here. Whether as a device or as a chip, the network device 101 can be manufactured, sold, or used as an independent product. In this embodiment and subsequent embodiments, only a network device is taken as an example for introduction.

For ease of understanding, the principles of the solutions proposed in the embodiments of the present application are first introduced below:

Since the working frequency bands of the radar system are 5.25～5.35GHz and 5.47～5.725GHz, the wireless communication equipment working in the 5GHz frequency band should avoid the working frequency band of the radar system as much as possible to avoid the aforementioned wireless communication equipment from causing interference to the radar system. At present, various countries or regions have set regulations on the frequency spectrum and power of their respective wireless communication equipment. For example, the standards set by the European Union certification mark (conformite europpene, CE), and the standards set by the US Federal Communications Commission (FCC) in the United States. Although various organizations have different regulations on the aforementioned wireless communication equipment, it is generally required that the detection probability of the wireless communication equipment on the radar signal must be greater than 60% to ensure that the wireless communication equipment can detect the radar system in time, thereby avoiding the wireless communication. The frequency point currently used by the device conflicts with the frequency spectrum of the radar system.

Specifically, for LTE-U (LTE over unlicensed) radar signal detection, when the LTE fixed frame format is configured, the uplink subframe of the frame format of the wireless communication device: the downlink subframe ratio is close to 3:2 to achieve The detection probability of the wireless communication device to the radar signal is greater than 60%. Because, the existing LTE fixed frame format is shown in Table 1 below:

Table 1

Therefore, it can be seen from Table 1 above that there are currently 7 uplink-downlink configurations, namely SA0, SA1, SA2, SA3, SA4, SA5, and SA6. It also lists the downlink-to-uplink switch-point periodicity (frame switching period), the number of downlink subframes (downlink subframe number), and the number of uplink subframes (uplink subframe number) for each uplink and downlink configuration. number) and the function corresponding to each subframe in each uplink and downlink configuration. Take the above downlink configuration SA0 as an example. Under this configuration, the switching period from downlink to uplink is 5 ms, and the ratio of the number of downlink subframes to the number of uplink subframes is 1:3. In addition, among the 9 subframes, the subframes with sequence numbers 0 and 5 are downlink subframes D, which are used to send downlink data, and the subframes with sequence numbers 2, 3, 4, 7, 8, and 9 are uplink subframes U , Used to receive uplink data sent by terminal equipment or detect radar signals. It can be seen that the fixed frame format SA0 and the fixed frame format SA6 can satisfy the uplink subframe: the ratio of the downlink subframe is greater than 60%. If the aforementioned fixed frame format SA0 or the fixed frame format SA6 is adopted, the throughput of the following main services will be greatly lost.

However, since the frame format is configured by the network device, the network device can switch the frame format at an appropriate time, so that the network device can ensure the success rate of radar signal detection while increasing the downlink throughput rate, thereby enabling Improve data transmission efficiency.

For ease of understanding, the following describes the flow of the data transmission method based on the aforementioned system architecture and application scenarios, as shown in Figure 2, including the following steps:

201. The network device uses the first frame format to send downlink data.

In this embodiment, in order to ensure the throughput of the downlink service, the network device may use the first frame format to send the downlink data. Wherein, the number of uplink subframes in the first frame format is less than the number of downlink subframes. Because the downlink subframe is mainly used to send downlink data to the terminal device. Therefore, when the network device uses the first frame format to send downlink data to the terminal device, the throughput of the downlink service can be guaranteed. In addition, since the first frame format also includes a certain proportion of uplink subframes, it can be used to detect subframes of pulse signals such as radar signals. Therefore, the network equipment can probabilistically detect the presence of some pulses in the radar signal. Specifically, the first frame format may be the SA2 frame format, which is not specifically limited here.

In addition, the aforementioned downlink data may be service data sent by the network device to the terminal device, or may be a control instruction sent by the network device to the terminal device, which is not specifically limited here.

202. The network device detects whether there is a discrete pulse signal in the first time window.

In this embodiment, when the network device sends downlink data to the terminal device, the network device will also use the uplink subframe in the first subframe to detect whether there is a discrete pulse signal.

Wherein, the first time window is one or more preset time ranges, and the window length of the first time window is the first time length. The first time window is used to indicate the time range for detecting discrete pulse signals. For example, if the window length of the first time window is a, the time range indicated by the first time window can be expressed as [T, (T+a)], where T=t _i (i=1, 2 , 3...). That is, the network device will detect whether there is a discrete pulse signal from time T to time (T+a). In addition, the window length of the first time window can be adjusted according to the requirements of detection accuracy. When higher detection accuracy is required, the network device sets a smaller window length for the first time window; when the accuracy requirements are not high And when power needs to be saved, the network device sets a larger window length for the first time window, which is not specifically limited here. In addition, it should also be noted that when the aforementioned first time window indicates multiple preset time ranges, the multiple time ranges may be continuous or overlapped, which is not specifically limited here.

In addition, the aforementioned discrete pulse signal may be a radar signal, or an interference signal, or a radar signal mixed with an interference signal. Because the network device adopts the uplink subframe in the aforementioned first frame format, it is not sufficient to accurately detect whether the aforementioned discrete pulse signal is a radar signal. Therefore, when the network device detects at least one discrete pulse signal within the first time window, the network device will perform step 203.

203. The network device switches the frame format for sending the downlink data from the first frame format to the second frame format.

In this embodiment, when the network device detects at least one discrete pulse signal within the first time window, the network device switches the frame format for sending the downlink data from the first frame format to the second frame format. Among them, the second frame format is used to detect radar signals. Since the network device cannot fully determine whether there is a radar signal only by detecting the discrete pulse signal, the network device switches the currently used first frame format to the second frame format for detecting radar signals. Since the second frame format is mainly used for radar detection, the detection of radar signals using the second frame format will be more accurate.

Specifically, the number of uplink subframes in the second frame format is greater than the number of downlink subframes. Since the uplink subframes in the second frame format are mainly used for receiving signals, it is advantageous to detect radar signals when the number of uplink subframes is large. Therefore, the network device uses the second subframe to detect the radar signal to ensure the accuracy of detecting the radar signal.

More specifically, the ratio of the number of uplink subframes to the number of downlink subframes in the second frame format is 1:1 to 4:1, that is, the number of uplink subframes accounts for the sum of the number of uplink subframes and the number of downlink subframes. 50% to 80%. Optionally, the ratio of the number of uplink subframes to the number of downlink subframes in the second frame format is 3:2, that is, the number of uplink subframes accounts for 60% of the sum of the number of uplink subframes and the number of downlink subframes.

In an optional implementation manner, the second frame format may be an LTE fixed frame format. For example, the second frame format may be a frame format in the foregoing Table 1. Since, among the fixed frame formats in the foregoing Table 1, only the SA0 frame format and the SA6 frame format are close to the foregoing ratio, therefore, the second frame format may be the foregoing SA0 frame format or SA6 frame format. When the second frame format is the SA0 frame format, the ratio of the number of uplink subframes to the number of downlink subframes is 3:1, that is, the number of uplink subframes accounts for 75% of the sum of the number of uplink subframes and the number of downlink subframes . When the second frame format is the SA6 frame format, the ratio of the number of uplink subframes to the number of downlink subframes is 5:3, that is, the number of uplink subframes accounts for 62.5% of the sum of the number of uplink subframes and the number of downlink subframes .

In another optional implementation manner, the second frame format may also adopt a combination of two or more frame formats, and the number of uplink subframes constituting the second frame format is greater than the number of downlink subframes. Further, in the combination of the two or more frame formats, the ratio of the number of uplink subframes to the number of downlink subframes is 1:1 to 4:1, that is, the number of uplink subframes accounts for the number of uplink subframes and the number of downlink subframes. 50% to 80% of the sum of the numbers. Optionally, in the combination of the two or more frame formats, the ratio of the number of uplink subframes to the number of downlink subframes is 3:2, that is, the number of uplink subframes occupies the sum of the number of uplink subframes and the number of downlink subframes 60% of it.

Further, the second frame format may be a combination of the discontinuous reception RX frame format and the SA2 frame format. The details are shown in Table 2:

Table 2

Wherein, the second subframe includes a periodic RX frame format and a periodic SA2 frame format, that is, an RX frame format composed of 10 subframes and an SA2 frame format composed of 10 subframes. Wherein, the RX frame format of this cycle is all uplink subframes. Therefore, at this time, the ratio of the number of uplink subframes to the number of downlink subframes in the second subframe is 11:6, that is, the number of uplink subframes accounts for 64.7% of the sum of the number of uplink subframes and the number of downlink subframes.

204. The network device uses the second frame format to detect radar signals.

In this embodiment, after the network device switches the frame format for sending the downlink data from the first frame format to the second frame format, the network device uses the second frame format to detect radar signals.

It should be understood that, at this time, since downlink subframes also exist in the second frame format, the network device will also send downlink data to the terminal device. However, because the downlink subframes in the second frame format account for a relatively low proportion, the network device will reduce the amount of downlink data sent to the terminal device, and mainly use the uplink subframe to detect whether there is a radar signal.

Since the radar signal is a continuous pulse signal, the network device needs to perform detection in a continuous period of time. Specifically, the network device may detect the radar signal in the second time window.

Wherein, the second time is one or more preset time ranges, and the window length of the second time window is the second time length. The second time window is used to indicate the time range for detecting the radar signal. For example, if the window length of the second time window is b, the time range indicated by the second time window can be expressed as [T, (T+b)], where T=t _i (i=1, 2 , 3...). That is, the network device will detect whether there is a continuous pulse signal from time T to time (T+b). In addition, the window length of the second time window can be adjusted according to the requirements of detection accuracy. When higher detection accuracy is required, the network device sets a smaller window length for the second time window; when the accuracy requirements are not high And when power needs to be saved, the network device sets a larger window length for the second time window, which is not specifically limited here. In addition, it should also be noted that when the aforementioned second time window indicates multiple preset time ranges, the multiple time ranges may be continuous or may overlap, which is not specifically limited here.

In addition, the duration indicated by the second time window is greater than the duration indicated by the first time window, that is, the aforementioned second duration is greater than the aforementioned first duration. Since the radar signal is a continuous periodic pulse signal rather than a discrete pulse signal, the window length of the second time window for detecting the radar signal should be greater than the window length of the first time window, which is beneficial to improve the detection of the network equipment To the accuracy of the radar signal.

In addition, the duration indicated by the foregoing second time window is greater than two periods of the radar pulse, that is, the second duration is greater than two periods of the radar pulse, and the radar signal includes a plurality of radar pulses. It is beneficial to detect a radar pulse with a complete cycle in the second time window, which is beneficial to improve the accuracy of detecting the radar signal by the network device.

Optionally, the duration indicated by the second time window is an integer multiple of the period of the second frame format, that is, the aforementioned second duration is an integer multiple of the period of the second frame format. It is beneficial for the network device to determine the second frame format, so that the first format and the second frame format can be smoothly connected in time.

When the network device detects a continuous pulse signal within the second time window, the network device may determine that a radar signal is detected within the second time window. At this time, the network device will execute step 205. When the network device does not detect radar information within the second time window, the network device will perform step 206.

205. The network device will switch the frequency of sending the downlink data.

When the network device detects a radar signal within the second time window, the network device will switch the frequency of sending the downlink data in order to avoid conflicts between the frequency of transmission data and the frequency of the radar signal.

206. The network device switches the frame format for sending the downlink data from the second frame format to the first frame format.

In this embodiment, when the aforementioned network device does not perform step 205, that is, the network device has not detected radar information since switching the frame format, the network device will switch the frame format for sending the downlink data from the second frame format To the first frame format.

In this embodiment, when the aforementioned network device performs step 205, if the network device then performs step 206, it means that the network device did not detect the radar signal within a period of time after switching the frequency. At this time, because the network The frame format for sending the downlink data by the device is switched from the second frame format to the first frame format, so as to improve the downlink throughput.

In this embodiment, the network device is configured with a second frame format for detecting radar signals. The network device uses the first frame format to send downlink data, and when at least one discrete pulse signal is detected, it switches to the second frame format to detect radar signals. Since the network device uses different frame formats to send downlink data and detect radar signals, the configuration of the first frame format and the second frame format can be more flexible, and the network device can ensure the success rate of radar signal detection at the same time. Improve the downlink throughput rate, which in turn can improve the data transmission efficiency.

As shown in FIG. 3, this embodiment provides a schematic structural diagram of a communication device 30. It should be understood that the network device in the method embodiment corresponding to FIG. 2 may be based on the structure of the communication device 30 shown in FIG. 3 in this embodiment. It should also be understood that when a subsequent evolved network device or base station executes the method involved in the embodiment of this application, the subsequent evolved network device or base station may also use the communication device 30 shown in FIG. 3 in this embodiment. structure.

The communication device 30 includes at least one processor 301, at least one memory 302, at least one transceiver 303, at least one network interface 305, and one or more antennas 304. The processor 301, the memory 302, the transceiver 303, and the network interface 305 are connected through a connecting device, and the antenna 304 is connected to the transceiver 303. Among them, the aforementioned connection device may include various interfaces, transmission lines or buses, etc., which is not limited in this embodiment.

Wherein, the aforementioned network interface 305 is used to connect the communication device 30 with other communication devices through a communication link. Specifically, the network interface 305 may include a network interface between the communication device 30 and a core network element, such as an S1 interface; the network interface 305 may also include the communication device 30 and other network devices (such as other access network devices). Or a network interface between core network elements), such as an X2 or Xn interface.

In addition, the aforementioned processor 301 is mainly used to process communication protocols and communication data, to control the entire network device, to execute software programs, and to process data of the software programs, for example, to support the communication device 30 to execute the aforementioned embodiments. Describe the action. The communication device 30 may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data. The central processing unit is mainly used to control the entire communication device 30, execute software programs, and process software. Program data. The processor 301 in FIG. 3 can integrate the functions of a baseband processor and a central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit can also be independent processors and are interconnected by technologies such as a bus. Those skilled in the art can understand that the communication device 30 may include multiple baseband processors to adapt to different network standards, the communication device 30 may include multiple central processors to enhance its processing capabilities, and the various components of the communication device 30 may use various Bus connection. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data can be built in the processor, or can be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.

In this embodiment, the memory 302 is mainly used to store software programs and data. The memory 302 may exist independently and is connected to the processor 301. Optionally, the memory 302 may be integrated with the processor 301, for example, integrated in one or more chips. Wherein, the memory 302 can store program codes for executing the technical solutions of the embodiments of the present application, and the processor 301 controls the execution. Various types of computer program codes executed can also be regarded as drivers of the processor 301. It should be understood that FIG. 3 in this embodiment only shows one memory and one processor. However, in actual applications, the communication device 30 may have multiple processors or multiple memories, which are not specifically described here. limited. In addition, the memory 302 may also be referred to as a storage medium or a storage device. The memory 302 may be a storage element on the same chip as the processor, that is, an on-chip storage element, or an independent storage element, which is not limited in the embodiment of the present application.

In this embodiment, the transceiver 303 may be used to support the reception or transmission of radio frequency signals between the communication device 30 and the terminal device, and the transceiver 303 may be connected to the antenna 304. The transceiver 303 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 304 can receive radio frequency signals, and the receiver Rx of the transceiver 303 is used to receive the radio frequency signals from the antenna 304, and convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals. The digital baseband signal or digital intermediate frequency signal is provided to the processor 301, so that the processor 301 performs further processing on the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing. In addition, the transmitter Tx in the transceiver 303 is also used to receive a modulated digital baseband signal or digital intermediate frequency signal from the processor 301, and convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and pass it through a Or multiple antennas 304 transmit the radio frequency signal. Specifically, the receiver Rx can selectively perform one or multiple down-mixing processing and analog-to-digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal. The sequence of the aforementioned down-mixing processing and analog-to-digital conversion processing is The order is adjustable. The transmitter Tx can selectively perform one or more stages of up-mixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a radio frequency signal, the up-mixing processing and the digital-to-analog conversion processing The order of precedence is adjustable. Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals.

It should be understood that the aforementioned transceiver 303 may also be referred to as a transceiving unit, transceiver, transceiving device, and the like. Optionally, the device used to implement the receiving function in the transceiver unit can be regarded as the receiving unit, and the device used to implement the transmitting function in the transceiver unit can be regarded as the transmitting unit. That is, the transceiver unit includes a receiving unit and a transmitting unit, and the receiving unit is also It can be called a receiver, an input port, a receiving circuit, etc., and a sending unit can be called a transmitter, a transmitter, or a transmitting circuit, etc.

As shown in FIG. 4, this embodiment provides another communication device 40. The communication device 40 may be a network device or a chip in the network device.

When the communication device 40 is a network device, the specific structure diagram of the communication device 40 can refer to the structure of the communication device 30 shown in FIG. 3. Optionally, the communication unit 402 of the communication device 40 may include the antenna and transceiver of the aforementioned communication device 30, such as the antenna 304 and the transceiver 303 in FIG. 3. Optionally, the communication unit 402 may also include a network interface, such as the network interface 305 in FIG. 3.

When the communication device 40 is a chip in the network device in the embodiment of the present application, the communication unit 402 may be an input or output interface, a pin, a circuit, or the like. The storage unit 403 may be a register, a cache, a RAM, etc. The storage unit 403 may be integrated with the processing unit 401; the storage unit 403 may be a ROM or other types of static storage devices that can store static information and instructions, the storage unit 403 It can be independent of the processing unit 401. When the communication device 40 is a chip in a network device, the processing unit 401 can complete the method executed by the network device in the foregoing embodiment.

In a possible design, the processing unit 401 may include instructions, which may be executed on a processor, so that the communication device 40 executes the method of the network device in the foregoing embodiment.

In another possible design, an instruction is stored in the storage unit 403, and the instruction can be executed on the processing unit 401, so that the communication device 40 executes the method of the network device in the foregoing embodiment. Optionally, the aforementioned storage unit 403 may also store data. Optionally, the processing unit 401 may also store instructions and/or data.

When the communication device 40 is a chip in a network device, the communication unit 402 or the processing unit 401 may perform the following steps:

For example, the communication unit 402 may use the first frame format to send downlink data.

For example, the processing unit 401 may switch the frame format for sending the downlink data from the first frame format to the second frame format when detecting at least one discrete pulse signal within the first time window.

For example, the processing unit 401 may switch the frequency of sending the downlink data when a radar signal is detected in the second time window.

For the rest, reference may be made to the method of the network device in the foregoing embodiment, which will not be repeated here.

Those skilled in the art can clearly understand that, for the convenience and conciseness of the description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

The above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still compare the previous embodiments. The recorded technical solutions are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A data transmission method, characterized in that it comprises:

The network device uses the first frame format to send downlink data;

When the network device detects at least one discrete pulse signal within the first time window, the network device switches the frame format for sending the downlink data from the first frame format to the second frame format, and the first frame format The two-frame format is used to detect radar signals;

When the network device detects a radar signal within a second time window, the network device will switch the frequency of sending the downlink data, and the second time window is used to indicate the time range for detecting the radar signal.
The method according to claim 1, wherein the method further comprises:

When the network device does not detect a radar signal within the second time window, the network device switches the frame format for sending the downlink data from the second frame format to the first frame format.
The method according to claim 1 or 2, wherein the radar signal includes a plurality of radar pulses, and the duration indicated by the second time window is greater than two periods of the radar pulses.
The method according to any one of claims 1 to 3, wherein the duration indicated by the second time window is an integer multiple of the period of the second frame format.
The method according to any one of claims 1 to 4, wherein the duration indicated by the second time window is greater than the duration indicated by the first time window.
The method according to any one of claims 1 to 5, wherein before the network device switches the frequency point for sending the downlink data, the method further comprises:

When the network device detects that there are multiple periodic pulse signals in the second time window, the network device determines that the radar signal is detected within the second time window.
The method according to any one of claims 1 to 6, wherein the number of uplink subframes in the first frame format is less than the number of downlink subframes, and the number of uplink subframes in the second frame format is greater than the number of downlink subframes. The number of frames.
A communication device, wherein the communication device is a network device or a chip or a functional unit in the network device;

The network equipment includes:

Processor and memory;

The memory is used to store programs;

The processor is used to execute the program to implement the method according to any one of claims 1 to 7.
A computer program product containing instructions, which is characterized in that when it runs on a computer, the computer executes the method according to any one of claims 1 to 7.
A computer-readable storage medium, characterized by comprising instructions, which when run on a computer, cause the computer to execute the method according to any one of claims 1 to 7.