Synchronous signal transmission method, electronic device and storage medium

Abstract

Embodiments of the present invention relate to the field of communication technology and disclose a method for transmitting a synchronization signal, an electronic device, and a storage medium. In the present invention, the method includes: grouping wireless frames to be transmitted to obtain multiple wireless frame groups; transmitting each wireless frame group through a first antenna port and a second antenna port, wherein the synchronization signal in at least one wireless frame in each wireless frame group is transmitted only through the first antenna port or the second antenna port. By grouping and transmitting wireless frames through the first antenna port and the second antenna port, and transmitting the synchronization signal in at least one wireless frame only through the first antenna port or the second antenna port, the autocorrelation of the synchronization signal received by the terminal is avoided from decreasing without the terminal's awareness, thereby reducing the possibility of terminal signal demodulation failure.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communication technology, and in particular to a method for sending a synchronization signal, an electronic device, and a storage medium. Background Art

[0002] In current NB-IoT application scenarios, when accessing the network, NB-IoT devices must first search for the cell's primary and secondary synchronization information. Only after achieving time-frequency synchronization between the terminal and the base station can they demodulate the cell's system messages and complete cell access. Therefore, demodulating primary and secondary synchronization is a critical step for terminal access. The Third Generation Partnership Project (3GPP) requires that the NB-IoT NB-IoT downlink channel support two antenna ports. However, due to cost and power consumption requirements, most terminals use a single antenna for reception.

[0003] The inventors of this application discovered that: since the main synchronization signal NPSS and the secondary synchronization signal NSSS on the base station side are designed differently from other physical layer signals, the terminal does not know the antenna port information on the base station side when demodulating the narrowband main synchronization signal NPSS and the narrowband secondary synchronization signal NSSS. Therefore, the narrowband main synchronization signal NPSS and the narrowband secondary synchronization signal NSSS sent by the two antennas on the base station side are completely identical signals in the time and frequency domains. After the synchronization signals sent by the two antennas of the base station pass through the spatial wireless channel, they are superimposed at the terminal antenna. At the terminal antenna, when the phases of the two signals are opposite, the signal strength of the superimposed signal drops sharply, and the signal-to-noise ratio of NPSS / NSSS will become low. Since the sequence lengths of NPSS and NSSS are relatively short, in low signal-to-noise ratio scenarios, the autocorrelation of the NPSS and NSSS sequences will be severely reduced, which will have a serious impact on the success rate of the terminal demodulating the NPSS and NSSS sequences. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a method for sending a synchronization signal, an electronic device, and a storage medium, so as to avoid the decrease in the autocorrelation of the synchronization signal received by the terminal without the terminal's perception, thereby reducing the possibility of terminal signal demodulation failure.

[0005] To solve the above technical problems, an embodiment of the present invention provides a method for sending a synchronization signal, including: grouping wireless frames to be sent to obtain multiple wireless frame groups; sending each wireless frame group through a first antenna port and a second antenna port, wherein the synchronization signal in at least one wireless frame in each wireless frame group is sent only through the first antenna port or the second antenna port.

[0006] An embodiment of the present invention also provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method for sending a synchronization signal as described above.

[0007] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program, which implements the above-mentioned method for sending a synchronization signal when executed by a processor.

[0008] Compared with the prior art, the embodiments of the present invention group the wireless frames to be sent to obtain multiple wireless frame groups, and send each wireless frame group through the first antenna port and the second antenna port. Each wireless frame group has at least one wireless frame that sends the synchronization signal in the wireless frame only through the first antenna port or the second antenna port, so that the terminal periodically receives only the synchronization signal from one antenna port, reducing the probability that the terminal will receive two signals with a phase difference of 180 degrees, resulting in signal cancellation and demodulation failure, and unable to complete synchronization with the base station.

[0009] In addition, each wireless frame group is sent through the first antenna port and the second antenna port, including: determining a first synchronization signal sending timing relationship of the wireless frame group at the first antenna port, and a second synchronization signal sending timing relationship of the wireless frame group at the second antenna port; the first synchronization signal sending timing relationship is used to indicate whether the synchronization signal in each wireless frame in the wireless frame group is sent through the first antenna port; the second synchronization signal sending timing relationship is used to indicate whether the synchronization signal in each wireless frame in the wireless frame group is sent through the second antenna port; according to the first synchronization signal sending timing relationship and the second synchronization signal sending timing relationship, the synchronization signal in each wireless frame in the wireless frame group is sent through the first antenna port and the second antenna port.

[0010] In addition, the timing relationship of synchronization signal transmission in the wireless frame is obtained by: generating a first timing bitmap for transmitting the synchronization signal in each wireless frame in the wireless frame group by the first antenna port based on the number of frames in the wireless frame group, and generating a second timing bitmap for transmitting the synchronization signal in each wireless frame in the wireless frame group by the second antenna port based on the number of frames in the wireless frame group; determining the timing relationship of synchronization signal transmission in the wireless frame of the wireless frame group in the wireless frame of the first antenna port based on the first timing bitmap, and determining the timing relationship of synchronization signal transmission in the wireless frame of the second antenna port based on the second timing bitmap. The NPSS / NSSS synchronization signal transmission timing relationship in the wireless frame is designed in the timing bitmap, and the two antenna ports transmit the synchronization signal in the wireless frame according to the instructions of the timing bitmap.

[0011] In addition, before sending each wireless frame group through the first antenna port and the second antenna port, it also includes: obtaining the power margin of the first antenna port and the power margin of the second antenna port; wherein the power margin of the first antenna port is the difference between the maximum power capability of the first antenna port and the configured power; the power margin of the second antenna port is the difference between the maximum power capability of the second antenna port and the configured power; based on the power margin of the first antenna port, determining whether to perform power compensation on the synchronization signal in the wireless frame sent by the first antenna port; based on the power margin of the second antenna port, determining whether to perform power compensation on the synchronization signal in the wireless frame sent by the second antenna port.

[0012] In addition, based on the power margin of the first antenna port, determining whether to perform power compensation on the synchronization signal in the radio frame sent by the first antenna port includes: if the power margin of the first antenna port is greater than or equal to a preset threshold, determining to perform power compensation on the synchronization signal in the radio frame sent by the first antenna port; based on the power margin of the second antenna port, determining whether to perform power compensation on the synchronization signal in the radio frame sent by the second antenna port includes: if the power margin of the second antenna port is greater than or equal to the preset threshold, determining to perform power compensation on the synchronization signal in the radio frame sent by the second antenna port. By performing power compensation on the synchronization signal in the transmitted radio frame when the currently configured power of the antenna port is insufficient, the signal strength received by the terminal is guaranteed, the signal-to-noise ratio of the signal received by the terminal is prevented from being reduced, and the stability of the terminal in demodulating the synchronization signal is improved.

[0013] In addition, power compensation is performed on a synchronization signal in a radio frame transmitted by a first antenna port, including: generating a power compensation bitmap for the first antenna port based on a timing bitmap of the first antenna port; and power compensating the synchronization signal in the radio frame transmitted by the first antenna port based on the power compensation bitmap of the first antenna port. Power compensation is performed on a synchronization signal in a radio frame transmitted by a second antenna port, including: generating a power compensation bitmap for the second antenna port based on a timing bitmap of the second antenna port; and power compensating the synchronization signal in the radio frame transmitted by the second antenna port based on the power compensation bitmap of the second antenna port. The power compensation bitmap is used to control the power compensation operation of the synchronization signal in the radio frame transmitted by the antenna port. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] One or more embodiments are exemplarily described by the figures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments.

[0015] Figure 1 is a flowchart of a method for sending a synchronization signal according to a first embodiment of the present invention;

[0016] Figure 2is a schematic structural diagram of a synchronization signal transmitting device according to a first embodiment of the present invention;

[0017] Figure 3 is a schematic diagram of the timing relationship between the transmission of the synchronization signal in the radio frame at the first antenna port and the second antenna port according to the first embodiment of the present invention;

[0018] Figure 4 is a flowchart of a method for sending a synchronization signal according to a second embodiment of the present invention;

[0019] Figure 5 is a schematic structural diagram of a synchronization signal transmitting device according to a second embodiment of the present invention;

[0020] Figure 6 is a flowchart of a method for sending a synchronization signal according to a third embodiment of the present invention;

[0021] Figure 7 is a schematic diagram of a timing relationship and a power compensation relationship of a synchronization signal in a wireless frame sent at a first antenna port and a second antenna port according to a third embodiment of the present invention;

[0022] Figure 8 FIG. 4 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, each embodiment of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be understood by those skilled in the art that in each embodiment of the present invention, many technical details are provided to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined with each other and referenced to each other under the premise that there is no contradiction.

[0024] The first embodiment of the present invention relates to a method for transmitting a synchronization signal. In this embodiment, wireless frames to be transmitted are grouped to obtain multiple wireless frame groups. Each wireless frame group is transmitted via a first antenna port and a second antenna port, wherein at least one wireless frame in each wireless frame group is transmitted only via the first antenna port or the second antenna port.

[0025] The method for sending synchronization signals in this embodiment can be applied to base station equipment in narrowband Internet of Things NB-IoT. The following takes the scenario in which the base station in NB-IoT sends the primary and secondary synchronization signals as an example to specifically describe the implementation details of the method for sending synchronization signals in this embodiment. The following content is only the implementation details provided for the convenience of understanding and is not necessary for the implementation of this solution.

[0026] The method for sending the synchronization signal in this embodiment is as follows: Figure 1 As shown, including:

[0027] Step 101: Group wireless frames to be sent.

[0028] Specifically, in the network signal transmission protocol, the total number of radio frames contained in a cycle is 1024, which is 2 to the power of 10. To ensure that the number of radio frame groups obtained after grouping all radio frames within a cycle is an integer, radio frames are generally grouped by a preset number of frames, where the preset number of frames is 2 to the power of N, where N is a natural number greater than or equal to 3. N can take different values ​​depending on the adjustment granularity. Since the time required to send each radio frame is the same, setting N to a smaller value can reduce the cycle time of radio frame group transmission.

[0029] In an example, assuming that wireless frames are divided into several wireless frame groups, each wireless frame group has a wireless frame group identifier, and the number of wireless frames contained in each wireless frame group is L, then the wireless frame numbers of the wireless frames contained in wireless frame group i are {iL, iL+1, iL+2, …, iL+L-1}, where i = 0, 1, 2 … (1024 / L)-1. When the number of wireless frames contained in each wireless frame group is different according to different adjustment granularities, L∈{8, 16, 32 …}.

[0030] Step 102: Send the synchronization signal in each radio frame in the radio frame group according to the sending timing relationship of the synchronization signal in the radio frame.

[0031] Specifically, in related technologies, the synchronization signals in all wireless frames are sent simultaneously through the first antenna port and the second antenna port, which means that the terminal will receive two identical synchronization signals. Since the two signals propagate along different paths in space, if the terminal happens to be in a position where the difference between the two signal propagation paths is , resulting in a phase difference of 180° between the two signals, where λ is the wavelength of the electromagnetic wave. At this point, the energy of the two signals cancels out at the terminal antenna, significantly reducing the signal-to-noise ratio (SNR) of the wireless signal received by the terminal. Furthermore, 3GPP stipulates that NB-IoT uses a primary synchronization signal (NPSS) and a secondary synchronization signal (NSSS). Because NPSS is generated based on a ZC sequence with a length of 11, the short sequence length reduces the autocorrelation of NPSS when the SNR is low, significantly reducing the success rate of NPSS demodulation by the terminal.

[0032] Therefore, in this embodiment, the timing relationship of the synchronization signal transmission in the wireless frames of the first antenna port and the second antenna port of the wireless frame group is used to instruct the first antenna port and the second antenna port to transmit each wireless frame group. By setting the timing relationship of the synchronization signal transmission in the wireless frames of the first antenna port and the second antenna port of the wireless frame group, it is indicated whether the synchronization signal in each wireless frame in the wireless frame group is transmitted through the first antenna port or the second antenna port, thereby realizing that the synchronization signal in part of the wireless frames in each wireless frame group is transmitted only through the first antenna port or the second antenna port. Since each wireless frame contains the sequence of NPSS and NSSS, the difference between the two signal propagation paths is The terminal at the position can also receive at least one radio frame containing the synchronization signal within a transmission period of a radio frame group, thereby demodulating the NPSS and NSSS.

[0033] In one example, before transmitting a radio frame, a first timing bitmap for transmitting synchronization signals in each radio frame in the radio frame group by the first antenna port and a second timing bitmap for transmitting synchronization signals in each radio frame in the radio frame group by the second antenna port are first generated based on a preset number of frames in the radio frame group. The number of bits in the timing bitmap is equal to the number of frames in the radio frame group. The first antenna port then determines the timing relationship for transmitting synchronization signals in the radio frame based on the first timing bitmap, and the second antenna port determines the timing relationship for transmitting synchronization signals in the radio frame based on the second timing bitmap. The first antenna port and the second antenna port then transmit the radio frame, respectively.

[0034] Furthermore, the radio frame transmission timing relationship between the first antenna port and the second antenna port is designed in a timing bitmap. This means that when the first and second antenna ports transmit a radio frame group, they use the timing bitmap to transmit the synchronization signal within the radio frame. The timing bitmap is a sequence of 0s or 1s, with each digit corresponding to a synchronization signal transmission within a radio frame. If the current value of the timing bitmap is 0, the synchronization signal within the radio frame is not transmitted. If the current value of the timing bitmap is 1, the synchronization signal within the radio frame is transmitted.

[0035] In one example, the synchronization signal sending method of this embodiment is implemented by a synchronization signal sending device, such as Figure 2 As shown, it includes: a grouping module 201, a calculation module 202 and an execution module 203.

[0036] The grouping module 201 is configured to group the radio frames into groups with a preset number of frames according to different adjustment granularities, and the length of each group of radio frames is the period for adjusting the radio frame groups.

[0037] The calculation module 202 is used to calculate the transmission status of the synchronization signal in the radio frame in each radio frame group, and generate a first timing bitmap and a second timing bitmap for the first antenna port and the second antenna port to transmit the synchronization signal in the radio frame.

[0038] The execution module 203 is configured to determine the transmission timing of the radio frames of the first antenna port and the second antenna port according to the timing bitmap, and execute the transmission action of the synchronization signal in the radio frame.

[0039] In a specific implementation, assuming that the number of frames in the current radio frame group is 8, the first antenna port and the second antenna port will each transmit with a period of 8 radio frames. Figure 3 The timing relationship of the synchronization signal in the wireless frame shown in FIG1 is sent at the first antenna port and the second antenna port, where port0 represents the first antenna port and port1 represents the second antenna port. The wireless frame in which the first antenna port sends the primary synchronization signal NPSS in a wireless frame group is F N mod8∈{0,1,3,5,7}, the radio frame in which the first antenna port sends the secondary synchronization signal NSSS is F N mod8∈{0,2,6}, the wireless frame of the primary synchronization signal NPSS sent by the second antenna port is F N mod8∈{0,2,4,6,7}, the wireless frame of the secondary synchronization signal NSSS sent by the second antenna port is F N mod8∈{0,4,6}. The timing bitmap indicating that the first antenna port transmits the primary synchronization signal NPSS is [11010101], and the timing bitmap indicating that the second antenna port transmits the secondary synchronization signal NSSS is [10100010]. The timing bitmap indicating that the second antenna port transmits the primary synchronization signal NPSS is [10101011], and the timing bitmap indicating that the second antenna port transmits the secondary synchronization signal NSSS is [10001010]. The first and second antenna ports transmit the primary and secondary synchronization signals according to the above timing bitmaps, respectively.

[0040] It should be noted that the above examples in this embodiment are only for illustrative purposes and do not limit the technical solutions of the present invention.

[0041] Compared with the prior art, this embodiment obtains multiple wireless frame groups by grouping the wireless frames to be sent, and sends each wireless frame group through the first antenna port and the second antenna port. In each wireless frame group, there is at least one wireless frame in which the synchronization signal is only sent through the first antenna port or the second antenna port, so that the terminal periodically receives only the synchronization signal from one antenna port, reducing the probability that the terminal receives two signals with a phase difference of 180 degrees, the signals cancel each other out, resulting in demodulation failure and inability to complete synchronization with the base station.

[0042] The second embodiment of the present invention relates to a method for transmitting a synchronization signal. The second embodiment is substantially the same as the first embodiment, with the main difference being that, in the second embodiment of the present invention, before transmitting each wireless frame group through the first antenna port and the second antenna port, the method further includes: obtaining a power margin of the first antenna port and a power margin of the second antenna port; wherein the power margin of the first antenna port is the difference between the maximum power capability of the first antenna port and the configured power; and the power margin of the second antenna port is the difference between the maximum power capability of the second antenna port and the configured power; determining whether to perform power compensation on the synchronization signal in the wireless frame transmitted by the first antenna port based on the power margin of the first antenna port; and determining whether to perform power compensation on the synchronization signal in the wireless frame transmitted by the second antenna port based on the power margin of the second antenna port.

[0043] The second embodiment of the present invention is described in detail below with reference to the accompanying drawings. The method for sending the synchronization signal in this embodiment is as follows: Figure 4 As shown, including:

[0044] Step 401: Group wireless frames to be sent.

[0045] This step is similar to step 101 in the first embodiment of the present invention. The relevant implementation details have been specifically described in the first embodiment of the present invention and will not be repeated here.

[0046] Step 402: Obtain a power margin of a first antenna port and a power margin of a second antenna port.

[0047] Specifically, the power margin of an antenna port is the difference between the maximum power capability of the antenna port and the configured power. The maximum power capability refers to the maximum power that the base station equipment can provide for an antenna port, while the configured power refers to the current actual transmit power of the antenna port. In actual base station deployments, the actual transmit power of an antenna port is likely to attenuate. Therefore, when an antenna port sends a wireless frame, it is necessary to obtain the configured power of the first and second antenna ports in real time, and simultaneously calculate and obtain the power margin of the first and second antenna ports.

[0048] Step 403 determines whether the power margin of the antenna port is greater than or equal to a preset threshold. If the power margin of the antenna port is greater than or equal to the preset threshold, step 404 is executed to perform power compensation on the synchronization signal in the radio frame transmitted by the antenna port. If the power margin of the antenna port is less than the preset threshold, step 405 is executed to transmit the synchronization signal in each radio frame in the radio frame group based on the transmission timing relationship of the synchronization signal in the radio frame.

[0049] Specifically, in this step, the relationship between the maximum power capabilities and the configured power of the first antenna port and the second antenna port of the base station is calculated to obtain the power margins of the first antenna port and the second antenna port.

[0050] Step 404: Perform power compensation on the synchronization signal in the wireless frame sent by the antenna port.

[0051] Specifically, if the power margin of the first antenna port is greater than or equal to the preset threshold, power compensation is performed on the synchronization signal in the wireless frame sent by the first antenna port; if the power margin of the second antenna port is greater than or equal to the preset threshold, power compensation is performed on the synchronization signal in the wireless frame sent by the second antenna port.

[0052] Step 405: Send the synchronization signal in each radio frame in the radio frame group according to the sending timing relationship of the synchronization signal in the radio frame.

[0053] Specifically, the base station detects the maximum power capability and configured power of each antenna port, calculates the power margin of each antenna port, and then determines whether to perform power compensation on the synchronization signal in the radio frames transmitted by the antenna port based on the power margin of each antenna port. In this embodiment, the preset condition is that the power margin of the antenna port is greater than or equal to a preset threshold. When the power margin meets the preset condition, it is determined that power compensation is performed on the synchronization signal in the radio frames transmitted by the antenna port. To ensure that the radio frames received by the terminal have a certain signal strength, when the configured power of the antenna port is low, that is, when the difference between the maximum power capability of the antenna port and the configured power is greater than or equal to the preset threshold, power compensation is required for the synchronization signal in the radio frames transmitted by the port.

[0054] Furthermore, let p1 and p2 represent the maximum power capabilities of the first antenna port and the second antenna port respectively; let P1 and P2 represent the configured powers of the first antenna port and the second antenna port respectively. Take the preset threshold a = 3dB. When the conditions p1 - P1 ≥ a and p0 - P0 ≥ a are satisfied, a power compensation flag 11 is generated; when p1 - P1 ≥ a and p0 - P0 < a, a power compensation flag 10 is generated; when p1 - P1 < a and p0 - P0 ≥ a, a power compensation flag 01 is generated; when p1 - P1 < a and p0 - P0 < a, a power compensation flag 00 is generated. Here, the power compensation flag consists of two digits. The first digit represents the power compensation status of the first antenna port, and the second digit represents the power compensation status of the second antenna port. 1 indicates that the power margin of the corresponding antenna port has reached the preset threshold, and power compensation needs to be performed on the synchronization signal in the transmitted wireless frame; 0 indicates that the power margin of the corresponding antenna port has reached the preset threshold, and no power compensation needs to be performed on the synchronization signal in the transmitted wireless frame. The power compensation value is generally taken as 3dB, that is, the power of the synchronization signal in the wireless frame is increased to twice the original.

[0055] In another example, since the synchronization signals in all wireless frames in the prior art are simultaneously transmitted by two antenna ports, for the wireless frames received by the terminal, the two signals are often superimposed, so there is relatively good signal strength. However, in the embodiments of the present invention, since the synchronization signals in some wireless frames are only transmitted through the first antenna port or the second antenna port, the problem of signal cancellation is avoided. However, since the power of a single antenna port may be low, if the synchronization signal in the currently transmitted wireless frame is only transmitted through the first antenna port or the second antenna port, power compensation is performed on the synchronization signal in the currently transmitted wireless frame. In order to enable the wireless frames transmitted by a single antenna to enable the terminal to obtain a signal strength similar to that of the wireless frames transmitted by two antennas, the power compensation value is also taken as 3dB, so that the power of the wireless frame is increased to twice the original. It should be noted that no matter how the power of the wireless frame is increased, the transmission power of the antenna port cannot be greater than the maximum power capability of the antenna port.

[0056] In one example, the method for transmitting the synchronization signal in this embodiment is implemented by a wireless frame transmitting device, as Figure 5 shown, including: a grouping module 501, a calculation module 502, an execution module 503, a judgment module 504, and a power compensation module 505.

[0057] The grouping module 501, the calculation module 502, and the execution module 503 are similar to the grouping module 201, the calculation module 202, and the execution module 203 in the first embodiment of the present invention. The functions related to the virtual module have been specifically described in the first embodiment of the present invention and will not be elaborated here.

[0058] The judgment module 504 is used to detect the maximum power capabilities and configured powers of the first antenna port and the second antenna port, and respectively judge the relationship between the maximum power capabilities and configured powers of the first antenna port and the second antenna port, and generate corresponding power compensation identifiers for the antenna ports.

[0059] The power compensation module 505 is configured to perform power compensation on the synchronization signal in the radio frame transmitted by each antenna port according to the power compensation identifier and the transmission timing relationship of the synchronization signal in each radio frame within the transmission period of each radio frame group.

[0060] Compared to existing technologies, this technology also checks the power margin of the antenna port before sending a wireless frame. If the power margin is greater than or equal to a preset threshold, power compensation is applied to the wireless frame sent from the antenna port. This significantly reduces the probability of a terminal receiving two signals with a 180-degree phase difference, which causes signal cancellation and demodulation failure, leading to inability to synchronize with the base station. It also ensures the signal strength of the signal received by the terminal, improves the signal-to-noise ratio of the synchronization signal, and ensures the stability of the terminal's demodulation of the synchronization signal.

[0061] The steps of the various methods above are divided only for the purpose of clear description. During implementation, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent. Adding insignificant modifications or introducing insignificant designs to the algorithm or process without changing the core design of the algorithm and process are all within the scope of protection of this patent.

[0062] The third embodiment of the present invention relates to a method for sending a synchronization signal. This embodiment is similar to the second embodiment of the present invention, except that: in this embodiment, power compensation is performed on the synchronization signal in the wireless frame sent by the first antenna port, including: generating a power compensation bitmap of the first antenna port according to the timing bitmap of the first antenna port; power compensating the wireless frame sent by the first antenna port according to the power compensation bitmap of the first antenna port; power compensating the wireless frame sent by the second antenna port, including: generating a power compensation bitmap of the second antenna port according to the timing bitmap of the second antenna port; and power compensating the wireless frame sent by the second antenna port according to the power compensation bitmap of the second antenna port.

[0063] The third embodiment of the present invention is described in detail below with reference to the accompanying drawings. The method for transmitting a wireless frame in this embodiment is as follows: Figure 6 Shown, including:

[0064] Step 601: Group wireless frames to be sent.

[0065] Step 602: Obtain a power margin of a first antenna port and a power margin of a second antenna port.

[0066] Step 603 determines whether the power margin of the antenna port meets a preset condition. If so, step 604 is executed to generate a power compensation bitmap based on the timing bitmap of the synchronization signal in the radio frame sent by the antenna port. If the power margin of the antenna port does not meet the preset condition, step 606 is executed to transmit the synchronization signal in each radio frame in the radio frame group based on the synchronization signal transmission timing relationship in the radio frames of the radio frame group.

[0067] Steps 601 to 603 are similar to steps 401 to 403 in the second embodiment of the present invention. The relevant implementation details have been specifically described in the second embodiment of the present invention and will not be repeated here.

[0068] Step 604: Generate a power compensation bitmap according to the timing bitmap of the synchronization signal in the radio frame sent by the antenna port.

[0069] Step 605: Compensate the synchronization signal in the radio frame sent by the antenna port according to the power compensation bitmap of the antenna port.

[0070] Specifically, in this embodiment, the power compensation bitmap for the first antenna port and the power compensation bitmap for the second antenna port are first generated based on the transmission timing bitmap of the synchronization signals in the radio frames of the first and second antenna ports. The power compensation bitmap is then used to control the power compensation actions of the antenna ports. Similar to the timing bitmap that controls the transmission of synchronization signals in radio frames by the antenna ports, the power compensation bitmap is also a digital sequence consisting of 0s or 1s. The number of bits in the digital sequence is the same as the number of frames in the radio frame group, and each digit corresponds to the power compensation action of the synchronization signal in a radio frame. If the value of the power compensation bitmap at the current moment is 0, it indicates that power compensation is not performed on the synchronization signal in the currently transmitted radio frame. If the value of the power compensation bitmap at the current moment is 1, it indicates that power compensation is performed on the currently transmitted radio frame.

[0071] In a specific implementation, assuming that the number of frames in the current radio frame group is 16, the first antenna port and the second antenna port will each transmit with a period of 16 radio frames. Figure 7 The timing relationship and power compensation relationship of the synchronization signal in the wireless frame shown in the figure are sent at the first antenna port and the second antenna port, where port0 represents the first antenna port and port1 represents the second antenna port. In a wireless frame group, the wireless frame in which the first antenna port sends the primary synchronization signal NPSS is F Nmod8∈{0,1,2,3,4,6,8,10,12,14}, the radio frame in which the first antenna port sends the secondary synchronization signal NSSS is F N mod8∈{0,2,4,6,8}, the wireless frame of the primary synchronization signal NPSS sent by the second antenna port is F N mod8∈{0,1,2,3,5,7,9,11,13,15}, the wireless frame of the secondary synchronization signal NSSS sent by the second antenna port is F N mod8∈{0,2,10,12,14}. The timing bitmap indicating that the first antenna port transmits the primary synchronization signal NPSS is [1111101010101010], and the timing bitmap indicating that the second antenna port transmits the secondary synchronization signal NSSS is [1010101010000000]. The timing bitmap indicating that the second antenna port transmits the primary synchronization signal NPSS is [1111010101010101], and the timing bitmap indicating that the second antenna port transmits the secondary synchronization signal NSSS is [1010000000101010]. The first and second antenna ports transmit the timing bitmaps containing the primary and secondary synchronization signals according to the above timing bitmaps.

[0072] Then, the power margins of the first antenna port and the second antenna port are calculated and obtained, and it is determined that power compensation needs to be performed on the synchronization signal in the wireless frame sent by the first antenna port, and power compensation does not need to be performed on the wireless frame sent by the second antenna port, and a power compensation flag 10 is generated. The wireless frame for which the first antenna port performs power compensation on the primary synchronization signal NPSS is calculated to be F N mod8∈{0,1,2,3,4,6,8,10,12,14}, the wireless frame for power compensation of the secondary synchronization signal NSSS is F N mod8∈{0,2,4,6,8}. Power compensation is not performed on the primary / secondary synchronization signal NPSS / NSSS radio frames sent through the second antenna port. The power compensation bitmap for transmitting the primary synchronization signal NPSS on the first antenna port is [1111101010101010], and the power compensation bitmap for transmitting the secondary synchronization signal is [1010101010000000].

[0073] A fourth embodiment of the present invention relates to an electronic device, such as Figure 8 As shown, it includes at least one processor 801; and a memory 802 that is communicatively connected to the at least one processor 801; wherein the memory 802 stores instructions that can be executed by the at least one processor 801, and the instructions are executed by the at least one processor 801 to enable the at least one processor 801 to execute the method for sending a synchronization signal in the first to third embodiments.

[0074] The memory 802 and processor 801 are connected using a bus. The bus may include any number of interconnected buses and bridges, connecting various circuits of one or more processors 801 and memory 802. The bus may also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits. These are all well known in the art and are therefore not described further herein. The bus interface provides an interface between the bus and the transceiver. The transceiver may be a single component or multiple components, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by the processor 801 is transmitted over a wireless medium via an antenna. Furthermore, the antenna receives data and transmits it to the processor 801.

[0075] The processor 801 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 802 can be used to store data used by the processor 801 when performing operations.

[0076] A fifth embodiment of the present invention relates to a computer-readable storage medium storing a computer program, which implements the above method embodiment when executed by a processor.

[0077] That is, those skilled in the art will understand that all or part of the steps in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a program, which is stored in a storage medium and includes a number of instructions for causing a device (which may be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc., various media that can store program code.

[0078] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and that in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A method for sending a synchronization signal, characterized in that: include: Grouping wireless frames to be sent by a preset number of frames to obtain a plurality of wireless frame groups; wherein the preset number of frames is a value of 2 raised to the power of N, where N is a natural number greater than or equal to 3; Transmitting each of the radio frame groups through a first antenna port and a second antenna port, wherein a synchronization signal in at least one radio frame in each radio frame group is transmitted only through the first antenna port or the second antenna port; and transmitting a synchronization signal of at least one other radio frame in each radio frame group through both the first antenna port and the second antenna port; Before sending each of the wireless frame groups through the first antenna port and the second antenna port, the method further includes: If the synchronization signal in the wireless frame to be sent is sent only through the first antenna port or the second antenna port, power compensation is performed on the synchronization signal in the wireless frame to be sent.

2. The method for transmitting a synchronization signal according to claim 1, wherein: The sending of each of the wireless frame groups through the first antenna port and the second antenna port includes: Determine a first synchronization signal transmission timing relationship of the radio frame group at the first antenna port, and a second synchronization signal transmission timing relationship of the radio frame group at the second antenna port; the first synchronization signal transmission timing relationship is used to indicate whether the synchronization signal in each radio frame in the radio frame group is sent through the first antenna port; the second synchronization signal transmission timing relationship is used to indicate whether the synchronization signal in each radio frame in the radio frame group is sent through the second antenna port; According to the first synchronization signal sending timing relationship and the second synchronization signal sending timing relationship, the synchronization signal in each wireless frame in the wireless frame group is sent through the first antenna port and the second antenna port.

3. The method for transmitting a synchronization signal according to claim 2, wherein: The timing relationship of sending the synchronization signal in the radio frame is obtained by: Generate a first timing bitmap for transmitting a synchronization signal in each radio frame in the radio frame group by the first antenna port according to the number of frames in the radio frame group, and generate a second timing bitmap for transmitting a synchronization signal in each radio frame in the radio frame group by the second antenna port according to the number of frames in the radio frame group; Determine the timing relationship of sending synchronization signals of the wireless frame group in the wireless frame of the first antenna port according to the first timing bitmap, and determine the timing relationship of sending synchronization signals of the wireless frame group in the wireless frame of the second antenna port according to the second timing bitmap.

4. The method for transmitting a synchronization signal according to claim 1, wherein: Before sending each of the wireless frame groups through the first antenna port and the second antenna port, the method further includes: Obtaining a power margin of the first antenna port and a power margin of the second antenna port; wherein the power margin of the first antenna port is the difference between the maximum power capability of the first antenna port and the configured power; and the power margin of the second antenna port is the difference between the maximum power capability of the second antenna port and the configured power; Determining, based on the power margin of the first antenna port, whether to perform power compensation on a synchronization signal in a radio frame sent by the first antenna port, including: if the power margin of the first antenna port is greater than or equal to a preset threshold, determining to perform power compensation on the synchronization signal in the radio frame sent by the first antenna port; According to the power margin of the second antenna port, determine whether to perform power compensation on the synchronization signal in the wireless frame sent by the second antenna port, including: if the power margin of the second antenna port is greater than or equal to the preset threshold, determine to perform power compensation on the synchronization signal in the wireless frame sent by the second antenna port.

5. The method for transmitting a synchronization signal according to claim 4, wherein: The performing power compensation on the synchronization signal in the radio frame sent by the first antenna port includes: generating a power compensation bitmap for the first antenna port according to the timing bitmap for the first antenna port; Performing power compensation on a synchronization signal in a radio frame sent by the first antenna port according to the power compensation bitmap of the first antenna port; The performing power compensation on the synchronization signal in the radio frame sent by the second antenna port includes: generating a power compensation bitmap for the second antenna port according to the timing bitmap for the second antenna port; Power compensation is performed on a synchronization signal in a wireless frame sent by the second antenna port according to the power compensation bitmap of the second antenna port.

6. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method for sending a synchronization signal according to any one of claims 1 to 5.

7. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for transmitting a synchronization signal according to any one of claims 1 to 5 is implemented.

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