WO2019061511A1

WO2019061511A1 - Synchronization signal transmission method and apparatus

Info

Publication number: WO2019061511A1
Application number: PCT/CN2017/105063
Authority: WO
Inventors: 余政; 程型清
Original assignee: 华为技术有限公司
Priority date: 2017-09-30
Filing date: 2017-09-30
Publication date: 2019-04-04

Abstract

Provided in embodiments of the present application are a synchronization signal transmission method and an apparatus, related to the field of communications, and capable of solving the problems of an ordinary ground UE mis-accessing a cell serving another type of UE, and another type of UE mis-accessing a cell serving a ground UE. The method is: user equipment receiving a main synchronization signal generated by a first synchronization sequence according to a first mapping mode and/or a first center frequency; or, user equipment receiving a main synchronization signal generated by a second synchronization sequence according to a second mapping mode. Embodiments of the present application are applied to an LTE system or an LTE evolved system.

Description

Method and device for synchronizing signal transmission

Technical field

The present application relates to the field of communications, and in particular, to a method and apparatus for synchronizing signal transmission.

Background technique

In the Long Term Evolution (LTE) system, when the user equipment (User Equipment, UE) is a drone, the downlink transmission of the drone is interfered by multiple base stations, and the uplink transmission of the drone It will cause interference to the uplink transmission of other types of UEs. Therefore, the drone needs to access the virtual drone cell by detecting the synchronization signal of the virtual drone cell. The virtual drone cell is composed of multiple physical cells.

The synchronization signal of the LTE includes a primary synchronization signal and a secondary synchronization signal. Currently, the transmission method of the primary synchronization signal of the LTE is that the base station takes an integer multiple of 100 kilohertz (kHz) as the center frequency, and transmits the first synchronization sequence in the second mapping manner. The generated primary sync signal. Illustratively, as shown in FIG. 1, it is assumed that the first synchronization sequence is D(0), D(1), ..., D(61). The second mapping mode may be: mapping D(0), D(1), ..., D(61) in sequence according to the frequency from the low frequency to the high frequency direction (ie, the direction from the small to the large subcarrier index). In the subcarriers.

If the transmission method of the primary LTE signal of the existing LTE is used as the transmission method of the primary synchronization signal of the virtual drone cell, the normal ground UE may be mistakenly accessed by the virtual drone cell, and the drone may mistakenly access the ground UE. Community. Alternatively, the existing transmission method of the LTE primary synchronization signal may cause the normal terrestrial UE to incorrectly access the cell served by other types of UEs (for example, a flight capable UE, specifically, a drone), and other types of UEs misconnected. The problem of entering a cell serving the terrestrial UE.

Summary of the invention

The embodiment of the present invention provides a method and an apparatus for synchronizing signal transmission, which can solve the problem that a normal terrestrial UE mis-accesses a cell serving other types of UEs, and other types of UEs mis-access a cell served by a terrestrial UE.

In a first aspect, the embodiment of the present application provides a method for synchronizing signal transmission, including: receiving, by a user equipment, a primary synchronization signal generated by a first synchronization sequence according to a first mapping manner and/or a first center frequency; or The mapping mode receives the primary synchronization signal generated by the second synchronization sequence. Compared to the prior art, user equipment (ie, other types of UEs, such as UEs with flight capability, specifically, such as drones) and normal terrestrial UEs are received in a second mapping manner and centered at an integer multiple of 100 KHz. The primary synchronization signal generated by the first synchronization sequence may cause a normal terrestrial UE to incorrectly access a cell serving other types of UEs, and a problem that other types of UEs may incorrectly access a cell serving the terrestrial UE. In the embodiment of the present application, the user equipment may adopt a synchronization signal transmission method different from that of the normal terrestrial UE. Specifically, when the primary synchronization signal is generated by the first synchronization sequence, the user equipment may receive the primary synchronization signal according to the first mapping manner and/or the first center frequency; when the primary synchronization signal is generated by the second synchronization sequence, the user equipment may The second mapping mode receives the primary synchronization signal. Therefore, the embodiment of the present application can solve the problem that a normal terrestrial UE erroneously accesses a cell serving other types of UEs, and other types of UEs erroneously access a cell serving the terrestrial UE.

In one possible design, the first synchronization sequence is:

Wherein u = 25, or 29, or 34, n in the formula (1) is a natural number between 0 and 30, and n in the formula (2) is a natural number between 31 and 61.

The second synchronization sequence is:

Wherein u=25, or 29, or 34, n in the formula (3) is a natural number between 0 and 15, and n in the formula (4) is a natural number between 16 and 30, in the formula (5) n is a natural number between 31 and 46, and n in the formula (6) is a natural number between 47 and 61. Therefore, when the primary synchronization signal is generated by the first synchronization sequence, the user equipment may receive the primary synchronization signal according to the first mapping mode and/or the first center frequency; when the primary synchronization signal is generated by the second synchronization sequence, the user equipment may The second mapping mode receives the primary synchronization signal. Compared with the prior art, the user equipment and the normal terrestrial UE receive the primary synchronization signal generated by the first synchronization sequence in the second mapping mode and the integer multiple of 100 KHz. In the embodiment of the present application, the synchronization signal of the user equipment is used. The transmission method may be different from the normal terrestrial UE, so that it can solve the problem that the normal terrestrial UE mis-accesses the cell serving other types of UEs, and the other type of UE mis-accesses the cell serving the terrestrial UE.

In a possible design, in the case that the primary synchronization signal is generated by the first synchronization sequence, the first mapping mode is d _u (2n) corresponding to the subcarrier with the subcarrier index K+n, d _u (2n+ 1) corresponding to a subcarrier whose subcarrier index is K+31+n; wherein K is a constant, n is a natural number between 0 and 30; and in the case where the primary synchronization signal is generated by the second synchronization sequence, the second mapping The mode is that d _u (n) corresponds to a subcarrier whose subcarrier index is K+n; wherein n is a natural number between 0 and 61. Compared with the prior art, the user equipment (ie, other types of UEs, such as the UAV) and the normal terrestrial UE receive the primary synchronization signal generated by the first synchronization sequence in the second mapping manner. In this embodiment, the user equipment may Receiving the primary synchronization signal generated by the first synchronization sequence according to the first mapping manner; or the user equipment may receive the primary synchronization signal generated by the second synchronization sequence according to the second mapping manner. Thereby, the problem that the normal terrestrial UE mis-accesses the cells serving other types of UEs, and the other types of UEs incorrectly access the cells serving the terrestrial UEs is solved.

In one possible design, the first center frequency is (100L + F) kilohertz; where L is a positive integer and F is a predetermined value. In this way, the user equipment can receive the primary synchronization signal generated by the first synchronization sequence in the first center frequency and the first mapping manner, and can solve the problem that the normal ground UE erroneously accesses the cell served by other types of UEs, and other types of UEs are misconnected. The problem of entering a cell serving the terrestrial UE.

In a possible design, in the case that the primary synchronization signal is generated by the second synchronization sequence, the method further includes: receiving, by the user equipment, the primary synchronization signal generated by the second synchronization signal according to the second center frequency, where the second center frequency is 100L kilohertz; where L is a positive integer. In this way, the user equipment can receive the primary synchronization signal generated by the first synchronization sequence at the second center frequency, and can solve the problem that the normal ground UE erroneously accesses the cell serving other types of UEs, and the other types of UEs are erroneously accessed as the ground UE service. The problem of the community.

In a second aspect, a user equipment is provided, including: a receiving unit, configured to receive a primary synchronization signal generated by a first synchronization sequence according to a first mapping manner and/or a first center frequency; or a receiving unit, configured to use, according to the second mapping The mode receives the primary synchronization signal generated by the second synchronization sequence.

In one possible design, the first synchronization sequence is:

The second synchronization sequence is:

Wherein u=25, or 29, or 34, n in the formula (3) is a natural number between 0 and 15, and n in the formula (4) is a natural number between 16 and 30, in the formula (5) n is a natural number between 31 and 46, and n in the formula (6) is a natural number between 47 and 61.

In a possible design, in the case that the primary synchronization signal is generated by the first synchronization sequence, the first mapping mode is d _u (2n) corresponding to the subcarrier with the subcarrier index K+n, d _u (2n+ 1) corresponding to a subcarrier whose subcarrier index is K+31+n; wherein K is a constant, n is a natural number between 0 and 30; and in the case where the primary synchronization signal is generated by the second synchronization sequence, the second mapping The mode is that d _u (n) corresponds to a subcarrier whose subcarrier index is K+n; wherein n is a natural number between 0 and 61.

In one possible design, the first center frequency is (100L + F) kilohertz; where L is a positive integer and F is a predetermined value.

In a possible design, in the case that the primary synchronization signal is generated by the second synchronization sequence, the receiving unit is further configured to: receive the primary synchronization signal generated by the second synchronization signal according to the second center frequency, and the second center frequency is 100L. Kilohertz; where L is a positive integer.

A third aspect provides a user equipment, including: a transceiver, configured to receive a primary synchronization signal generated by a first synchronization sequence according to a first mapping manner and/or a first center frequency; or a transceiver, configured to perform according to the second mapping The mode receives the primary synchronization signal generated by the second synchronization sequence.

In one possible design, the first synchronization sequence is:

The second synchronization sequence is:

In a possible design, in the case that the primary synchronization signal is generated by the second synchronization sequence, the transceiver is further configured to: receive the primary synchronization signal generated by the second synchronization signal according to the second center frequency, and the second center frequency is 100L. Kilohertz; where L is a positive integer.

In a fourth aspect, an embodiment of the present application provides a device, which is in the form of a product of a chip. The device includes a processor and a memory, and the memory is coupled to the processor to save necessary program instructions of the device. And data, the processor is operative to execute program instructions stored in the memory such that the apparatus performs the functions of the user equipment in the above method.

In a fifth aspect, the embodiment of the present application provides a user equipment, where the user equipment can implement the functions performed by the user equipment in the foregoing method embodiment, and the functions can be implemented by using hardware or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

In one possible design, the user equipment includes a processor and a communication interface configured to support the user equipment to perform corresponding functions in the above methods. The communication interface is used to support the user Communication between the device and other network elements. The user equipment can also include a memory for coupling with the processor that holds the program instructions and data necessary for the user equipment.

In a sixth aspect, an embodiment of the present application provides a computer readable storage medium, including instructions, when executed on a computer, causing a computer to perform any one of the methods provided by the first aspect.

In a seventh aspect, an embodiment of the present application provides a computer program product comprising instructions, which when executed on a computer, cause the computer to perform any one of the methods provided by the first aspect.

According to an eighth aspect, a method for transmitting a synchronization signal includes: transmitting, by a network device, a primary synchronization signal generated by a first synchronization sequence according to a first mapping manner and/or a first center frequency; or transmitting, by the network device according to the second mapping manner The primary synchronization signal generated by the second synchronization sequence. Compared with the prior art, the network device receives the primary synchronization signal generated by the first synchronization sequence with the second mapping mode and the integer frequency of 100 kHz as the center frequency, which may cause the normal terrestrial UE to access the user equipment (ie, other types of UEs). For example, a cell of a drone, and a problem that a user equipment misconnects to a cell served by a terrestrial UE. In the embodiment of the present application, when the network device sends the synchronization signal to the user equipment, a synchronization signal transmission method different from the normal ground UE may be adopted. Specifically, when the primary synchronization signal is generated by the first synchronization sequence, the network device may send the primary synchronization signal according to the first mapping manner and/or the first center frequency; when the primary synchronization signal is generated by the second synchronization sequence, the network device may The second mapping mode transmits the primary synchronization signal. Therefore, the embodiment of the present application can solve the problem that a normal terrestrial UE erroneously accesses a cell serving other types of UEs, and other types of UEs erroneously access a cell serving as a terrestrial UE.

In one possible design, the first synchronization sequence is:

The second synchronization sequence is:

Wherein u=25, or 29, or 34, n in the formula (3) is a natural number between 0 and 15, and n in the formula (4) is a natural number between 16 and 30, in the formula (5) n is a natural number between 31 and 46, and n in the formula (6) is a natural number between 47 and 61. Thus, when the primary synchronization signal is generated by the first synchronization sequence, the user equipment can receive the primary synchronization signal according to the first mapping mode and/or the first center frequency; when the primary synchronization signal is When the second synchronization sequence is generated, the user equipment may receive the primary synchronization signal according to the second mapping manner. Compared with the prior art, the user equipment and the normal terrestrial UE receive the primary synchronization signal generated by the first synchronization sequence in the second mapping mode and the integer multiple of 100 KHz. In the embodiment of the present application, the synchronization signal of the user equipment is used. The transmission method may be different from the normal terrestrial UE, so that it can solve the problem that the normal terrestrial UE mis-accesses the cell serving other types of UEs, and the other type of UE mis-accesses the cell serving the terrestrial UE.

In one possible design, the first center frequency is (100L + F) kilohertz; where L is a positive integer and F is a predetermined value. In this way, the user equipment can receive the primary synchronization signal generated by the first synchronization sequence in the first center frequency and the first mapping manner, and can solve the problem that the normal ground UE erroneously accesses the cell served by other types of UEs, and other types of UEs are misconnected. The problem of entering a cell serving the terrestrial UE. In this way, the user equipment can receive the primary synchronization signal generated by the first synchronization sequence at the second center frequency, and can solve the problem that the normal ground UE erroneously accesses the cell serving other types of UEs, and the other types of UEs are erroneously accessed as the ground UE service. The problem of the community.

In a possible design, in a case where the primary synchronization signal is generated by the second synchronization sequence, the method further includes: the network device transmitting the primary synchronization signal generated by the second synchronization signal according to the second center frequency, where the second center frequency is 100L kilohertz; where L is a positive integer.

A ninth aspect, a network device, including: a sending unit, configured to send a primary synchronization signal generated by a first synchronization sequence according to a first mapping manner and/or a first central frequency; or a sending unit, configured to use, according to the second mapping The mode transmits the primary synchronization signal generated by the second synchronization sequence.

In one possible design, the first synchronization sequence is:

The second synchronization sequence is:

In a possible design, in the case that the primary synchronization signal is generated by the second synchronization sequence, the transmitting unit is further configured to: send the primary synchronization signal generated by the second synchronization signal according to the second center frequency, and the second center frequency is 100L. Kilohertz; where L is a positive integer.

A tenth aspect, a network device, comprising: a transceiver, configured to send a primary synchronization signal generated by a first synchronization sequence according to a first mapping manner and/or a first central frequency; or a transceiver, configured to perform according to the second mapping The mode transmits the primary synchronization signal generated by the second synchronization sequence.

In one possible design, the first synchronization sequence is:

The second synchronization sequence is:

In a possible design, in a case where the primary synchronization signal is generated by the second synchronization sequence, the transceiver is further configured to: send the primary synchronization signal generated by the second synchronization signal according to the second center frequency, and the second center frequency is 100L. Kilohertz; where L is a positive integer.

In an eleventh aspect, an embodiment of the present application provides a device, which is in the form of a product of a chip. The device includes a processor and a memory, and the memory is coupled to the processor to save the necessary program of the device. The instructions and data are used by the processor to execute program instructions stored in the memory such that the apparatus performs the functions of the network device in the method described above.

In a twelfth aspect, the embodiment of the present application provides a network device, where the network device can implement the functions performed by the network device in the foregoing method, and the function can be implemented by using hardware or by executing corresponding software through hardware. The hardware or software includes one or more modules corresponding to the above functions.

In one possible design, the network device includes a processor and a communication interface configured to support the network device to perform corresponding functions in the above methods. The communication interface is used to support communication between the network device and other network elements. The network device can also include a memory for coupling with the processor that holds the necessary program instructions and data for the network device.

In a thirteenth aspect, the embodiment of the present application provides a computer readable storage medium, comprising instructions, when executed on a computer, causing the computer to perform any one of the methods provided by the first aspect.

In a fourteenth aspect, the embodiment of the present application provides a computer program product comprising instructions, when executed on a computer, causing the computer to perform any one of the methods provided by the first aspect.

Compared with the prior art, the user equipment (ie, other types of UEs, such as drones) and the normal terrestrial UE receive the primary synchronization signal generated by the first synchronization sequence in a second mapping manner and at an integer multiple of 100 KHz. It may cause normal terrestrial UEs to incorrectly access cells serving other types of UEs, and others. The problem that the type UE misconnects to the cell serving the terrestrial UE. In the embodiment of the present application, the user equipment may adopt a synchronization signal transmission method different from that of the normal terrestrial UE. Specifically, when the primary synchronization signal is generated by the first synchronization sequence, the user equipment may receive the primary synchronization signal according to the first mapping manner and/or the first center frequency; when the primary synchronization signal is generated by the second synchronization sequence, the user equipment may The second mapping mode receives the primary synchronization signal. Therefore, the embodiment of the present application can solve the problem that a normal terrestrial UE erroneously accesses a cell serving other types of UEs, and other types of UEs erroneously access a cell serving the terrestrial UE.

DRAWINGS

1 is a schematic diagram of a primary synchronization signal provided by the prior art;

2 is a system architecture diagram provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of signal interaction of a synchronization signal transmission method according to an embodiment of the present disclosure;

4 is a schematic diagram of a primary synchronization signal of a virtual drone cell according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a primary synchronization signal of a virtual drone cell according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of frequency resources occupied by a primary synchronization signal at a second center frequency according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of frequency resources occupied by a primary synchronization signal at a first center frequency according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.

Detailed ways

The embodiments of the present application can be applied to various types of communication systems. For each type of communication system, there are physical devices that transmit uplink data and physical devices that receive the uplink data. For example, the embodiment of the present application can be applied to an LTE system or an LTE evolution system.

The system architecture of the embodiment of the present application may include a network device that sends uplink data and a user equipment that receives the uplink data. The network device may be a base station or a UE, and the user equipment may be a UE. Exemplarily, as shown in FIG. 2, the system architecture of the embodiment of the present application includes a base station and a plurality of different types of UEs (for example, UE1 to UE6). Among them, UE1 and UE2 may be drones, UE3 may be a smart tanker, UE4 may be a smart coffee machine, UE5 may be a mobile phone, and UE6 may be a smart printer. The UE1 to the UE6 can send uplink data to the base station, and the base station can receive the uplink data sent by the UE1 to the UE6.

In a possible design, the system architecture of the embodiment of the present application may include UE4, UE5, and UE6. In the communication system, UE4 and UE6 can transmit uplink data to UE5, and UE5 can receive uplink data sent by UE4 and UE6.

The embodiment of the present application provides a method for synchronizing signal transmission. The network device is used as a base station, the user equipment is a drone, and the cell is a virtual UAV cell. For example, as shown in FIG. 3, the method includes:

301. The base station sends a synchronization signal.

The synchronization signal includes a primary synchronization signal and a secondary synchronization signal. Wherein, the primary synchronization signal can be synchronized by the first synchronization Column generation, the length of the first synchronization sequence is 62.

In a possible design, the base station may send the primary synchronization signal generated by the first synchronization sequence according to the first mapping manner.

The first synchronization sequence can be:

Wherein u = 25, or 29, or 34, n in the formula (1) is a natural number between 0 and 30 (including 0 and 30), and n in the formula (2) is a natural number between 31 and 61 ( Includes 31 and 61).

When the first synchronization sequence is the above equations (1) and (2), the first mapping mode may be that d _u (2n) corresponds to a subcarrier whose subcarrier index is K+n, and d _u (2n+1) and The subcarrier index is a subcarrier corresponding to K+31+n; where K is a constant and n is a natural number between 0 and 30. That is, the first mapping mode is d _u (0) corresponding to the subcarrier whose subcarrier index is K, and d _u (2) corresponds to the subcarrier whose subcarrier index is K+1..., d _u (30) Corresponding to the subcarrier with the subcarrier index of K+30, d _u (1) corresponds to the subcarrier with the subcarrier index of K+31, and d _u (3) corresponds to the subcarrier with the subcarrier index of K+32. ....., d _u (61) corresponds to a subcarrier whose subcarrier index is K+61.

Exemplarily, assume that the first synchronization sequence is D(0), D(1), ..., D(61). The first mapping mode may be: D(2i) is mapped in a resource element whose subcarrier index is k+i; D(2i+1) is mapped in a resource element whose subcarrier index is k+31+i. Where k is a positive integer and i is a natural number between 0 and 30 (ie, i=0, 1, 2, ..., 30). As shown in Figure 4, D(0), D(2), D(4), D(6), ... D(60), D(1), D(3), D(5), ...D (61) sequentially mapped in consecutive subcarriers.

Exemplarily, assuming that the first synchronization sequence is D(0), D(1), ..., D(61), the first mapping manner may be: D(0) mapping in a resource element with a subcarrier index of k D(4i) is mapped in a resource element with a subcarrier index of k+i; D(1) is mapped in a resource element with a subcarrier index of k+16, and D(4i+1) is mapped at a subcarrier index of k. +16+i resource elements; where i=1, 2, ..., 15. D(2) is mapped in a resource element with a subcarrier index of k+32, D(4i+2) is mapped in a resource element with a subcarrier index of k+32+i; D(3) is mapped at a subcarrier index of Among the resource elements of k+47, D(4i+3) is mapped to resource elements with subcarrier index k+47+i, i=1, 2, . . . , 14 . As shown in FIG. 5, D(0), D(4), D(8), ..., D (in order) according to the frequency from the low frequency to the high frequency direction (that is, according to the subcarrier index value from small to large). 60), D(1), (5), D(9), ..., D(61), D(2), D(6), D(10), ..., D(58), D(( 3), D(7), D(11), ... and D(59) are mapped in consecutive subcarriers.

In another possible design, the base station may send the primary synchronization signal generated by the first synchronization sequence according to the first mapping manner and the second center frequency.

The second center frequency can be 100 L kilohertz; where L is a positive integer.

For example, as shown in FIG. 6, the base station may transmit a first synchronization sequence of the unmanned cell with a center frequency of 100 L kilohertz and a grid of 100 kHz.

In another possible design, the base station may transmit the primary synchronization signal generated by the first synchronization sequence according to the first center frequency.

The first center frequency may be (100L + F) kilohertz; where L is a positive integer and F is a predetermined value. For example, F can be 50.

For example, as shown in FIG. 7, the base station may transmit a first synchronization sequence of the drone cell with a (100L+50) kilohertz center frequency and a 100 kilohertz grid (or granularity).

In another possible design, the base station may send the primary synchronization signal generated by the first synchronization sequence according to the first mapping manner and the first center frequency.

In another possible design, the base station may send the primary synchronization signal generated by the second synchronization sequence according to the second mapping manner.

The second synchronization sequence can be:

Where u = 25, or 29, or 34, n in the formula (3) is a natural number between 0 and 15 (including 0 and 15), and n in the formula (4) is a natural number between 16 and 30 ( Including 16 and 30), n in the formula (5) is a natural number between 31 and 46 (including 31 and 46), and n in the formula (6) is a natural number between 47 and 61 (including 47 and 61).

When the second synchronization sequence is the above equations (3) to (6), the second mapping manner may be that d _u (n) corresponds to a subcarrier whose subcarrier index is K+n; wherein n is 0 to 61. Natural numbers between (including 0 and 61). That is, the second mapping mode is d _u (0) corresponding to the subcarrier whose subcarrier index is K, and d _u (1) corresponds to the subcarrier whose subcarrier index is K+1, ..., d _u (61) and the sub The carrier index is corresponding to the subcarrier of K+61.

For example, assume that the second synchronization sequence is D(0), D(2), D(4), D(6), ... D(60), D(1), (3), D(5) , ... D (61), the second mapping mode may be: according to the frequency from the low frequency to the high frequency direction, sequentially D (0), D (2), D (4), D (6), ... D (60 ), D(1), D(3), D(5), ..., D(61) are mapped in consecutive subcarriers. Referring back to Figure 4, namely D(0), D(2), D(4), D(6), ... D(60), D(1), D(3), D(5), ..., and D (61) are sequentially mapped in subcarriers whose subcarrier indices are K, K+1, K+2, ..., K+61.

Referring back to FIG. 5, it is assumed that the second synchronization sequence is D(0), D(4), D(8), ..., D(60), D(1), D(5), D(9). ,...,D(61),D(2),D(6),D(10),......,D(58),D(3),D(7),D(11),......, D (59), the second mapping mode may be: according to the frequency from the low frequency to the high frequency direction, sequentially D(0), D(4), D(8), ..., D(60), D(1) , D(5), D(9), ..., D(61), D(2), D(6), D(10), ..., D(58), D(3), D(7 ), D(11), ..., D(59) are mapped in consecutive subcarriers.

In another possible design, the base station may send the primary synchronization signal generated by the second synchronization sequence according to the second mapping mode and the first center frequency.

In another possible design, the base station may send the primary synchronization signal generated by the second synchronization sequence according to the second mapping mode and the second center frequency.

In another possible design, the base station may send the primary synchronization signal generated by the first synchronization sequence according to the second mapping manner and the first center frequency.

In addition, the process of transmitting the secondary synchronization signal by the base station may refer to the prior art, and details are not described herein again.

302. The drone receives the synchronization signal.

When the UAV needs to access the UAV cell, the cell search is first performed, that is, the Synchronization Channel (SCH) and the Broadcast Channel (BCH) in the downlink are detected.

When detecting the SCH, the drone may receive the primary synchronization signal generated by the first synchronization sequence according to the first mapping manner.

In one possible design, the drone can receive the primary synchronization signal generated by the first synchronization sequence according to the first center frequency.

In another possible design, the drone may receive the primary synchronization signal generated by the second synchronization sequence according to the second mapping manner.

In another possible design, the drone may receive the primary synchronization signal generated by the second synchronization sequence according to the second mapping mode and the second center frequency.

In another possible design, the drone may receive the primary synchronization signal generated by the first synchronization sequence according to the second mapping mode and the first center frequency.

For the process of receiving the secondary synchronization signal by the drone, reference may be made to the prior art, and details are not described herein again.

303. The UAV determines a cell identifier according to the primary synchronization signal and the secondary synchronization signal.

Specifically, the UAV can determine the cell identity N2ID according to the primary synchronization signal, and determine the group identity N1ID according to the secondary synchronization sequence. Further, the cell is uniquely identified according to the N2ID and the N1ID, and the search process of the UAV cell is completed.

Thus, when the primary synchronization signal is generated by the first synchronization sequence, the user equipment (eg, the drone) can receive the primary synchronization signal according to the first mapping mode and/or the first center frequency; when the primary synchronization signal is generated by the second synchronization sequence The user equipment may receive the primary synchronization signal according to the second mapping manner. Compared with the prior art, the user equipment and the normal terrestrial UE receive the primary synchronization signal generated by the first synchronization sequence in the second mapping manner and the integer frequency of 100 kHz as the center frequency, which may cause the normal terrestrial UE to misconnect into other types. The cell served by the UE, and the problem that other types of UEs mis-access the cell serving the terrestrial UE. In the embodiment of the present application, the user equipment may use a synchronization signal transmission method different from that of the normal terrestrial UE, and can solve the problem that the normal terrestrial UE erroneously accesses the cell serving other types of UEs, and the other type of UE erroneously accesses the cell served by the ground UE. The problem.

The solution provided by the embodiment of the present application is mainly introduced from the perspective of the network device and the user equipment. It can be understood that the network device and the user equipment include performing various functions in order to implement the above functions. Corresponding hardware structure and / or software modules. Those skilled in the art will readily appreciate that the present application can be implemented in a combination of hardware or hardware and computer software in conjunction with the algorithm steps described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

The embodiments of the present application may divide the function modules of the network device and the user equipment according to the foregoing method. For example, each function module may be divided according to each function, or two or more functions may be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner.

FIG. 8 is a schematic diagram showing a possible structure of the network device 8 involved in the foregoing embodiment, and the network device includes: a sending unit 801. In the embodiment of the present application, the sending unit 801 may be configured to send a primary synchronization signal generated by the first synchronization sequence according to the first mapping manner and/or the first center frequency, or send the primary generated by the second synchronization sequence according to the second mapping manner. Synchronization signal. In the method embodiment shown in FIG. 3, the sending unit 801 is configured to support the network device to perform the process 301 in FIG. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

In the case of employing an integrated unit, FIG. 9 shows a possible structural diagram of the network device involved in the above embodiment. In the present application, the network device may include a processing module 901, a communication module 902, and a storage module 903. The processing module 901 is configured to control various parts of the network device, the application software, and the like. The communication module 902 is configured to receive commands sent by other devices by using a wireless Fidelity (WiFi) communication method, or The data of the network device is sent to other devices; the storage module 903 is used to perform storage of software programs of the network device, storage of data, operation of software, and the like. The processing module 901 can be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (Application-Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor can also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication module 902 can be a transceiver, a transceiver circuit, a communication interface, or the like. The storage module 903 can be a memory.

In the embodiment of the present application, the processing module 901 may be configured to generate a primary synchronization signal according to the first synchronization sequence or the second synchronization sequence.

The communication module 902 can be configured to send the primary synchronization signal generated by the first synchronization sequence according to the first mapping manner and/or the first central frequency; or send the primary synchronization signal generated by the second synchronization sequence according to the second mapping manner.

The storage module 903 can be used to store a primary synchronization signal.

The embodiment of the present application further provides a network device, such as a base station. Figure 10 shows a schematic diagram of a simplified base station structure. The base station includes a 1001 part and a 1002 part. The 1001 part is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals; the 1002 part is mainly used for baseband processing to control the base station. Wait. The 1001 portion may be generally referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver. The 1002 portion is typically the control center of the base station and may be referred to as a processing unit for controlling the base station to perform the steps performed by the base station (i.e., the serving base station) of FIG. 3 above. For details, please refer to the description of the relevant part above.

The transceiver unit of the 1001 part, which may also be called a transceiver, or a transceiver, etc., includes an antenna and a radio frequency unit, wherein the radio frequency unit is mainly used for radio frequency processing. Alternatively, the device for implementing the receiving function in the 1001 portion may be regarded as a receiving unit, and the device for implementing the transmitting function may be regarded as a transmitting unit, that is, the 1001 portion includes a receiving unit and a transmitting unit. The receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit or the like.

The 1002 portion may include one or more boards, each of which may include one or more processors and one or more memories for reading and executing programs in the memory to implement baseband processing functions and for base stations control. If multiple boards exist, the boards can be interconnected to increase processing power. As an optional implementation manner, multiple boards share one or more processors, or multiple boards share one or more memories, or multiple boards share one or more processes at the same time. Device. The memory and the processor may be integrated or independently. In some embodiments, the 1001 portion and the 1002 portion may be integrated or may be independently arranged. In addition, all the functions in the 1002 part may be implemented in one chip, or may be partially integrated in one chip to realize another part of the function integration in one or more other chips, which is not limited in this application.

FIG. 11 is a schematic diagram showing a possible structure of the user equipment 11 involved in the foregoing embodiment, where the user equipment includes: a receiving unit 1101. In the embodiment of the present application, the receiving unit 1101 may be configured to receive a primary synchronization signal generated by the first synchronization sequence according to the first mapping manner and/or the first center frequency, or receive the primary generated by the second synchronization sequence according to the second mapping manner. Synchronization signal. In the method embodiment shown in FIG. 3, the receiving unit 1101 is configured to support the user equipment to perform the processes 302 and 303 in FIG. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

In the case of employing an integrated unit, FIG. 12 shows a possible structural diagram of the user equipment involved in the above embodiment. In the present application, the user equipment may include a processing module 1201, a communication module 1202, and a storage module 1203. The processing module 1201 is configured to control various parts of the user equipment, the application software, and the like. The communication module 1202 is configured to receive an instruction sent by another device by using a communication method such as WiFi, or send the data of the user equipment to another device. The storage module 1203 is configured to perform storage of software programs of the user equipment, storage of data, operation of software, and the like. The processing module 1201 may be a processor or a controller, such as a CPU, a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor can also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication module 1202 can be a transceiver, a transceiver circuit, a communication interface, or the like. The storage module 1203 may be a memory.

In the embodiment of the present application, the communication module 1202 may be configured to receive a primary synchronization signal generated by the first synchronization sequence according to the first mapping manner and/or the first center frequency, or receive the primary generated by the second synchronization sequence according to the second mapping manner. Synchronization signal.

The storage module 1203 can be used to store a primary synchronization signal.

When the processing module 1201 is a processor, the communication module 1202 is a communication interface, and the storage module 1203 is a memory, the user equipment can be implemented by the computer device (or system) in FIG.

FIG. 13 is a schematic diagram of a computer device according to an embodiment of the present application. Computer device 1300 includes at least one processor 1301, a communication bus 1302, a memory 1303, and at least one communication interface 1304.

The processor 1301 may be a general central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more for controlling the execution of the program of the present application. integrated circuit.

Communication bus 1302 can include a path for communicating information between the components described above.

Communication interface 1304, using any type of transceiver, for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .

The memory 1303 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions. The dynamic storage device can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, and a disc storage device. (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be Any other media accessed, but not limited to this. The memory can exist independently and be connected to the processor via a bus. The memory can also be integrated with the processor.

The memory 1303 is configured to store application code for executing the solution of the present application, and is controlled by the processor 1301 for execution. The processor 1301 is configured to execute application code stored in the memory 1303 to implement the functions in the method of the present patent.

In a specific implementation, as an embodiment, the processor 1301 may include one or more CPUs, such as CPU0 and CPU1 in FIG.

In a particular implementation, as an embodiment, computer device 1300 can include a processor 1301. Each of the processors can be a single-CPU processor or a multi-core processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data, such as computer program instructions.

In a particular implementation, as an embodiment, computer device 1300 can also include an output device 1305 and an input device 1306. Output device 1305 communicates with processor 1301 and can display information in a variety of ways. For example, the output device 1305 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. Wait. Input device 1306 is in communication with processor 1301 and can accept user input in a variety of ways. For example, input device 1306 can be a mouse, keyboard, touch screen device, or sensing device, and the like.

The computer device 1300 described above can be a general purpose computer device or a special purpose computer device. In a specific implementation, the computer device 1300 can be a desktop computer, a portable computer, a network server, A personal digital assistant (PDA), a mobile phone, a tablet, a wireless terminal device, a communication device, an embedded device, or a device having a similar structure as in FIG. The embodiment of the present application does not limit the type of computer device 1300.

The steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware or may be implemented by a processor executing software instructions. The software instructions may be comprised of corresponding software modules that may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, removable hard disk, read-only optical disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a core network interface device. Of course, the processor and the storage medium may also exist as discrete components in the core network interface device.

Those skilled in the art will appreciate that in one or more examples described above, the functions described herein can be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

The specific embodiments of the present invention have been described in detail with reference to the specific embodiments of the present application. It is to be understood that the foregoing description is only The scope of protection, any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present application are included in the scope of protection of the present application.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Therefore, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, embodiments of the present application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing, thereby The instructions executed on a computer or other programmable device provide steps for implementing the functions specified in one or more blocks of the flowchart or in a flow or block of the flowchart.

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the embodiments of the present invention.

Claims

A method for synchronizing signal transmission, comprising:

Receiving, by the user equipment, the primary synchronization signal generated by the first synchronization sequence according to the first mapping manner and/or the first center frequency; or

The user equipment receives the primary synchronization signal generated by the second synchronization sequence according to the second mapping manner.
The method of claim 1 wherein said first synchronization sequence is:

Wherein, u=25, or 29, or 34, wherein n in the formula (1) is a natural number between 0 and 30, and n in the formula (2) is a natural number between 31 and 61;

The second synchronization sequence is:

Wherein u=25, or 29, or 34, n in the formula (3) is a natural number between 0 and 15, and n in the formula (4) is a natural number between 16 and 30, in the formula (5) n is a natural number between 31 and 46, and n in the formula (6) is a natural number between 47 and 61.
The method according to claim 2, wherein in the case that the primary synchronization signal is generated by the first synchronization sequence, the first mapping mode is d u (2n) and the subcarrier index is K+ The subcarrier corresponding to n, d u (2n+1) corresponds to a subcarrier whose subcarrier index is K+31+n; wherein K is a constant, and n is a natural number between 0 and 30;

In a case where the primary synchronization signal is generated by the second synchronization sequence, the second mapping mode is d u (n) corresponding to a subcarrier whose subcarrier index is K+n; wherein n is 0 to 61 The natural number between.
A method according to any one of claims 1 to 3, wherein said first center frequency is (100L + F) kilohertz; wherein L is a positive integer and F is a predetermined value.
The method according to any one of claims 1 to 3, wherein, in the case that the primary synchronization signal is generated by the second synchronization sequence, the method further comprises:

The user equipment receives a primary synchronization signal generated by the second synchronization signal according to a second center frequency, where the second center frequency is 100 L kilohertz; wherein L is a positive integer.
A method for synchronizing signal transmission, comprising:

The network device sends the first synchronization sequence generated according to the first mapping mode and/or the first center frequency Step signal; or

The network device sends the primary synchronization signal generated by the second synchronization sequence according to the second mapping manner.
The method of claim 6 wherein said first synchronization sequence is:

Wherein, u=25, or 29, or 34, wherein n in the formula (1) is a natural number between 0 and 30, and n in the formula (2) is a natural number between 31 and 61;

The second synchronization sequence is:

Wherein u=25, or 29, or 34, n in the formula (3) is a natural number between 0 and 15, and n in the formula (4) is a natural number between 16 and 30, in the formula (5) n is a natural number between 31 and 46, and n in the formula (6) is a natural number between 47 and 61.
The method according to claim 7, wherein in the case that the primary synchronization signal is generated by the first synchronization sequence, the first mapping mode is d u (2n) and the subcarrier index is K+ The subcarrier corresponding to n, d u (2n+1) corresponds to a subcarrier whose subcarrier index is K+31+n; wherein K is a constant, and n is a natural number between 0 and 30;

In a case where the primary synchronization signal is generated by the second synchronization sequence, the second mapping mode is d u (n) corresponding to a subcarrier whose subcarrier index is K+n; wherein n is 0 to 61 The natural number between.
A method according to any one of claims 6-8, wherein said first center frequency is (100L + F) kilohertz; wherein L is a positive integer and F is a predetermined value.
The method according to any one of claims 6-8, wherein, in the case that the primary synchronization signal is generated by the second synchronization sequence, the method further comprises:

The network device transmits a primary synchronization signal generated by the second synchronization signal according to a second center frequency, where the second center frequency is 100 L kilohertz; wherein L is a positive integer.
A user equipment, comprising:

a receiving unit, configured to receive, according to the first mapping manner and/or the first center frequency, a primary synchronization signal generated by the first synchronization sequence; or

The receiving unit is configured to receive a primary synchronization signal generated by the second synchronization sequence according to the second mapping manner.
The user equipment according to claim 11, wherein the first synchronization sequence is:

Wherein, u=25, or 29, or 34, wherein n in the formula (1) is a natural number between 0 and 30, and n in the formula (2) is a natural number between 31 and 61;

The second synchronization sequence is:

Wherein u=25, or 29, or 34, n in the formula (3) is a natural number between 0 and 15, and n in the formula (4) is a natural number between 16 and 30, in the formula (5) n is a natural number between 31 and 46, and n in the formula (6) is a natural number between 47 and 61.
The user equipment according to claim 12, wherein in the case that the primary synchronization signal is generated by the first synchronization sequence, the first mapping mode is d u (2n) and the subcarrier index is K. +n subcarriers correspond, d u (2n+1) corresponds to subcarriers whose subcarrier index is K+31+n; where K is a constant and n is a natural number between 0 and 30;

In a case where the primary synchronization signal is generated by the second synchronization sequence, the second mapping mode is d u (n) corresponding to a subcarrier whose subcarrier index is K+n; wherein n is 0 to 61 The natural number between.
The user equipment according to any one of claims 11-13, wherein the first center frequency is (100L+F) kilohertz; wherein L is a positive integer and F is a predetermined value.
The user equipment according to any one of claims 11 to 13, wherein in the case that the primary synchronization signal is generated by the second synchronization sequence, the receiving unit is further configured to:

Receiving a primary synchronization signal generated by the second synchronization signal according to a second center frequency, the second center frequency being 100 L kilohertz; wherein L is a positive integer.
A network device, comprising:

a sending unit, configured to send, according to the first mapping manner and/or the first center frequency, a primary synchronization signal generated by the first synchronization sequence; or

The sending unit is configured to send a primary synchronization signal generated by the second synchronization sequence according to the second mapping manner.
The network device according to claim 16, wherein the first synchronization sequence is:

Wherein, u=25, or 29, or 34, wherein n in the formula (1) is a natural number between 0 and 30, and n in the formula (2) is a natural number between 31 and 61;

The second synchronization sequence is:

Wherein u=25, or 29, or 34, n in the formula (3) is a natural number between 0 and 15, and n in the formula (4) is a natural number between 16 and 30, in the formula (5) n is a natural number between 31 and 46, and n in the formula (6) is a natural number between 47 and 61.
The network device according to claim 17, wherein in the case that the primary synchronization signal is generated by the first synchronization sequence, the first mapping mode is d u (2n) and the subcarrier index is K. +n subcarriers correspond, d u (2n+1) corresponds to subcarriers whose subcarrier index is K+31+n; where K is a constant and n is a natural number between 0 and 30;

In a case where the primary synchronization signal is generated by the second synchronization sequence, the second mapping mode is d u (n) corresponding to a subcarrier whose subcarrier index is K+n; wherein n is 0 to 61 The natural number between.
A network device according to any one of claims 16-18, wherein said first center frequency is (100L + F) kilohertz; wherein L is a positive integer and F is a predetermined value.
The network device according to any one of claims 16 to 18, wherein, in the case that the primary synchronization signal is generated by the second synchronization sequence, the sending unit is further configured to:

Transmitting a primary synchronization signal generated by the second synchronization signal according to a second center frequency, the second center frequency being 100 L kilohertz; wherein L is a positive integer.