CN106658614B - Cell search method, device and system - Google Patents

Abstract

A cell search method, applied to base station equipment, is characterized in that, the cell search method comprises: in a limited time-frequency resource location, based on a preset or notified design rule, transmit synchronization in the form of a beam Signal. The present invention also provides a terminal device and a system for implementing the cell search method. The invention can make the terminal equipment timely and accurately search for the target serving cell, and is especially suitable for the serving cell working on the high frequency point.

Description

Cell search method, device and system

technical field

The present invention relates to the field of mobile communication, in particular to a cell search method, device and system.

Background technique

The traditional LTE system generally works on a lower frequency, so the channel has better propagation characteristics, and the base station can send a synchronization signal to the terminals within the coverage of the entire serving cell. However, considering that in the subsequent mobile communication system, the resources of the low frequency band are more effective, and it may be necessary to work on the higher frequency band. In higher frequency bands, due to the propagation characteristics of high frequencies, the attenuation of the signal will be more serious, so the coverage of the cell cannot be guaranteed.

SUMMARY OF THE INVENTION

In view of the above content, it is necessary to propose a cell search method, which can enable a terminal device to search for a target serving cell in a timely and accurate manner, and is especially suitable for a serving cell operating at a high frequency.

A cell search method, applied to base station equipment, includes:

In a limited time-frequency resource location, the synchronization signal is transmitted in the form of a beam based on a preset or notified design rule, wherein the design rule is known to the terminal, so that the terminal can follow the design according to the design rule. Regularly search for synchronization signals and establish initial synchronization with the cell.

In a preferred embodiment of the present invention, the design rule includes: the time-frequency position of the synchronization signal transmitted on each beam is fixed.

In a preferred embodiment of the present invention, the design rule includes: the synchronization signal carries the information of the beam, so that the beam and the synchronization signal transmitted on the beam have a corresponding relationship.

In a preferred embodiment of the present invention, within the limited time-frequency resource position, a synchronization signal is transmitted once on each beam.

In a preferred embodiment of the present invention, within the limited time-frequency resource location, synchronization signals are transmitted multiple times on each beam, and the synchronization signals sent on the same beam are different.

A cell search method, applied to terminal equipment, includes:

When the terminal device is powered on or needs to perform cell handover, scan in the working frequency band supported by the terminal device;

A synchronization channel is detected on a supported frequency point, and when it is determined that the synchronization channel is transmitted in the form of a beam according to a preset or notified rule, the synchronization signal is acquired according to the preset rule. The preset rules include: the time-frequency position of the synchronization signal transmitted on each beam is fixed, and the corresponding relationship between the beam and the synchronization signal transmitted on the beam; and

After the synchronization signal is obtained, initial synchronization is established with the cell.

In a preferred embodiment of the present invention, the synchronization channel is detected on a supported frequency point, and when it is determined that the synchronization channel is transmitted in the form of a beam according to a preset or notified rule, the preset synchronization channel is determined according to the preset or notified rule. The rules for obtaining the synchronization signal include:

When the synchronization channel is detected, the information of the beam is obtained according to the synchronization sequence of the synchronization signal, and the synchronization signal at the fixed time-frequency position on the beam is obtained.

In view of the above content, it is also necessary to propose a base station device, which can enable the terminal device to search for the target serving cell in a timely and accurate manner, and is especially suitable for serving cells operating at high frequencies.

A base station device includes:

a signal sending unit, configured to transmit a synchronization signal in the form of a beam based on a preset or notified design rule within a limited time-frequency resource location, wherein the design rule is known to the terminal, so that the The terminal searches for a synchronization signal according to the design rule, and establishes initial synchronization with the cell.

In a preferred embodiment of the present invention, the design rule includes: the time-frequency position of the synchronization signal transmitted on each beam is fixed.

In a preferred embodiment of the present invention, the design rule includes: the synchronization signal carries the information of the beam, so that the beam and the synchronization signal transmitted on the beam have a corresponding relationship.

In a preferred embodiment of the present invention, within the limited time-frequency resource position, a synchronization signal is transmitted once on each beam.

In a preferred embodiment of the present invention, within the limited time-frequency resource location, synchronization signals are transmitted multiple times on each beam, and the synchronization signals sent on the same beam are different.

In view of the above content, it is also necessary to propose a terminal device that can timely and accurately search for a target serving cell, which is especially suitable for serving cells operating at high frequency points.

A terminal device includes:

a scanning unit, configured to scan in the working frequency band supported by the terminal device when the terminal device is powered on or needs to perform cell handover;

The arithmetic unit is configured to detect the synchronization channel on the supported frequency points, and obtain the synchronization channel according to the preset rule when it is judged that the synchronization channel is transmitted in the form of a beam according to the preset or notified rule a synchronization signal, the preset rules include: the time-frequency position of the synchronization signal transmitted on each beam is fixed, and the corresponding relationship between the beam and the synchronization signal transmitted on the beam; and

The synchronization unit is used to establish initial synchronization with the cell after obtaining the synchronization signal.

In a preferred embodiment of the present invention, the synchronization channel is detected on a supported frequency point, and when it is determined that the synchronization channel is transmitted in the form of a beam according to a preset or notified rule, the preset synchronization channel is determined according to the preset or notified rule. The rules for obtaining the synchronization signal include:

When the synchronization channel is detected, the information of the beam is obtained according to the synchronization sequence of the synchronization signal, and the synchronization signal at the fixed time-frequency position on the beam is obtained.

In view of the above content, it is also necessary to propose a cell search method and system, which can enable a terminal device to search for a target serving cell in a timely and accurate manner, and is especially suitable for a serving cell operating at a high frequency.

A cell search system, comprising:

Base station equipment and terminal equipment; of which:

The base station equipment transmits a synchronization signal in the form of a beam within a limited time-frequency resource location, wherein the synchronization signal has a certain design rule on the beam;

The terminal device knows the design rule of the synchronization signal on the beam in advance, and learns the time-frequency resource position of the synchronization signal transmitted on the beam according to the design rule, so as to obtain the synchronization signal and establish synchronization.

In a preferred embodiment of the present invention, the design rule includes: the time-frequency position of the synchronization signal transmitted on each beam is fixed.

In a preferred embodiment of the present invention, the design rule includes: the synchronization signal carries the information of the beam, so that the beam and the synchronization signal transmitted on the beam have a corresponding relationship.

In a preferred embodiment of the present invention, within the limited time-frequency resource position, a synchronization signal is transmitted once on each beam.

In a preferred embodiment of the present invention, within the limited time-frequency resource location, synchronization signals are transmitted multiple times on each beam, and the synchronization signals sent on the same beam are different.

The cell search method, device and system of the present invention can make the terminal equipment timely and accurately search for the target serving cell, which is especially suitable for the serving cell working on the high frequency point, and can ensure the coverage of the cell.

Description of drawings

FIG. 1 is a system architecture diagram for implementing a preferred embodiment of the cell search method of the present invention.

FIG. 2 is a flowchart of a method of signal transmission performed by a base station device in the cell search method of the present invention.

FIG. 3 is a flowchart of a method of signal search performed by a terminal device in the cell search method of the present invention.

FIG. 4 shows an example diagram of the first preferred embodiment of the signal transmission of the present invention.

FIG. 5 shows an example diagram of the second preferred embodiment of the signal transmission of the present invention.

FIG. 6 is an example diagram of a third preferred embodiment of signal transmission of the present invention.

FIG. 7 is a structural diagram of a first embodiment of a base station device for executing the cell search method of the present invention.

FIG. 8 is a structural diagram of a first embodiment of a terminal device that executes the cell search method of the present invention.

FIG. 9 is a structural diagram of a second embodiment of a base station device for executing the cell search method of the present invention.

FIG. 10 is a structural diagram of a second embodiment of a terminal device that executes the cell search method of the present invention.

Description of main component symbols

Cell Search System 1

Base station equipment 2

Signaling unit 200

storage device 21

processing unit 22

Receiver 23

sending device 24

Terminal Equipment 3

Scanning unit 300

arithmetic unit 301

Synchronization unit 302

Memory 31

processor 32

receiver 33

Transmitter 34

Monitor 35

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to FIG. 1 , it is a system architecture diagram for implementing a preferred embodiment of the cell search method of the present invention.

In a preferred embodiment of the present invention, the cell search method is implemented in a cell search system 1 . The cell search system 1 includes at least one base station device 2 and at least one terminal device 3 . The base station device 2 and the terminal device 3 can be connected and communicated through a mobile communication network.

The mobile communication network includes, for example, a Global System for Mobile Communications (GSM) network, a Code Division Multiple Access (CDMA) network, a Time Division Multiple Access (TDMA) network, a broadband Code Division Multiple Access (Wideband CodeDivision Multiple Access Wireless, WCDMA) network, Frequency Division Multiple Access (Frequency Division Multiple Addressing, FDMA) network, Orthogonal Frequency-Division Multiple Access (OFDMA) network, Single-Carrier FDMA (SC -FDMA) network, General Packet Radio Service (General Packet Radio Service, GPRS) network, Long Term Evolution (Long Term Evolution, LTE) network, and other communication networks of this type.

The base station equipment (equipments of base station) 2 refers to a radio transceiver station that transmits information with the terminal equipment 3 through a mobile communication switching center in a certain radio coverage area.

Generally, one base station apparatus 2 contains three sectors. The base station equipment 2 transmits signals in a certain direction in each sector, covering a certain range. For example, under normal circumstances, among the three sectors of a base station device 2, one of the sector antennas is aimed at the true north direction, and the coverage is 120 degrees, and the other sector is aimed at the southeast direction, and the coverage is 120 degrees. Another sector is aimed at the southwest direction, and the coverage is 120 degrees, so that the three sectors can fully cover the surroundings of the base station device 2 in 360 degrees. In general, one sector corresponds to one cell, but sometimes multiple sectors may be combined into one cell.

In a preferred embodiment of the present invention, the terminal equipment 3 may also be called user equipment (User Equipment, UE), which is used in a mobile communication network, including mobile phones, smart terminals, multimedia equipment, streaming media equipment, and the like.

In the application of the mobile communication system, the terminal device 3 needs to search for a suitable cell (such as the cell with the highest measured power) after powering on, and then synchronize with this cell in terms of time slot and frequency. information to obtain detailed information about this area. The terminal device 3 can use the services of the mobile network only after logging into the cell. The process of the terminal device 3 from power-on search to logging on to a suitable cell is generally defined as an initial cell search process. Synchronization is a key step in the initial cell search, which refers to the process from the time when the terminal device 3 is powered on to achieve time synchronization and frequency synchronization with the cell.

Traditionally, the base station device 2 transmits the synchronization signal in a broadcast manner to the entire coverage of the cell it contains. Therefore, the signal is usually propagated on a lower frequency channel with better propagation characteristics. At higher frequencies, due to the propagation characteristics of high frequencies, the attenuation of the signal will be severe, so the signal may not be able to guarantee the coverage of the entire cell.

Different from the traditional way in which the synchronization signal is broadcast to the whole cell, in the preferred embodiment of the present invention, the base station equipment 2 transmits the synchronization signal in the form of a beam in a limited time-frequency resource position. It should be noted that Yes, the base station may send different beams at different times, covering different parts of the cell. Wherein, the synchronization signal has a certain design rule on the beam.

In a preferred embodiment of the present invention, the design rule may include, but is not limited to: the time-frequency position of the synchronization signal transmitted on each beam is fixed. Further, the beam also carries the transmitted sequence of synchronization signals. The sequences of synchronization signals transmitted on different beams may be the same or different.

In a preferred embodiment of the present invention, within the limited time-frequency resource position, the synchronization signal can be transmitted only once on each beam.

In another preferred embodiment of the present invention, within the limited time-frequency resource location, synchronization signals can be transmitted multiple times on each beam, and the synchronization signals sent on the same beam are different.

The terminal device 3 knows the design rule of the synchronization signal on the beam in advance. For example, the terminal device 3 may store the design rule of the synchronization signal on the beam in advance, and learn the transmission on each beam according to the design rule. The time-frequency resource location of the synchronization signal to obtain the synchronization signal and establish synchronization. Or the design rule is notified to the terminal in advance.

As shown in FIG. 2 , it is a flowchart of a method of signal transmission performed by the base station device 2 in the cell search method of the present invention.

S10, the base station device 2 transmits a signal in the form of a beam, such as a synchronization signal, based on a preset or notified design rule within a limited time-frequency resource location.

In a preferred embodiment of the present invention, the design rules may include the following two methods:

Method 1: Synchronous channel single transmission.

In this method, as shown in FIG. 4 , for a limited time-frequency resource location, the synchronization signal is transmitted only once on each beam, and the time-frequency location of the synchronization signal transmitted on each beam is fixed. Further, the beam also carries the transmitted sequence of synchronization signals. The sequences of synchronization signals transmitted on different beams may be the same or different.

Method 2: The synchronization channel is transmitted multiple times.

In this method, as shown in FIG. 5 , within a limited time-frequency resource location, the synchronization signal is transmitted multiple times on each beam, and the time-frequency location of the synchronization signal transmitted on each beam is fixed. Further, the beam also transmits the sequence of synchronization signals. The sequences of synchronization signals transmitted on different beams may be the same or different. The synchronization signals sent on the same beam are different.

In a preferred embodiment of the present invention, the design rule further includes:

The synchronization signal carries the information of the beam, so that the beam and the synchronization signal transmitted on the beam have a certain corresponding relationship. For example, the corresponding relationship is as follows:

It should be understood that the above table is only an exemplary correspondence. Based on the same principle, in the case of supporting more or less beam transmission, there will be different corresponding tables.

Referring to FIG. 3 , it is a flowchart of a method of signal search performed by a terminal device in the cell search method of the present invention.

According to different requirements, the order of the steps in this flowchart can be changed, and some steps can be omitted.

S20, when the terminal device 3 is powered on or needs to perform cell handover, scan is performed within the working frequency band supported by the terminal device 3.

S21, the terminal device 3 detects a synchronization channel on a supported frequency point, and obtains the synchronization channel according to the preset rule when judging that the synchronization channel is transmitted in the form of a beam according to a preset or notified rule sync signal.

In a preferred embodiment of the present invention, the preset rule may include that the time-frequency position of the synchronization signal transmitted on each beam is fixed, and the corresponding relationship between the beam and the synchronization signal transmitted on the beam.

In a preferred embodiment of the present invention, the terminal device 3 knows the preset rules in advance.

When detecting the synchronization channel, the terminal device 3 acquires the information of the beam according to the synchronization sequence of the synchronization signal, and then acquires the synchronization signal at the fixed time-frequency position on the beam.

For example, according to the corresponding relationship in the above table, when the terminal device 3 detects the synchronization channel and finds that the received synchronization signal is the synchronization sequence 1, the terminal device 3 can determine that the synchronization signal of the cell is broadcast. When the terminal device 3 detects the synchronization channel and finds that the received synchronization signal is the synchronization sequence 2, the terminal device 3 determines that the transmission of the synchronization signal of the cell has the characteristics of a beam, and the The terminal device 3 can perform data interaction on the first beam to receive and transmit data.

In addition, the terminal device 3 knows in advance the time-frequency resource position of the transmission of the synchronization signal on each beam. In the example of FIG. 4 , the synchronization signals on different beams are transmitted on the same frequency resource and adjacent time resources. When the terminal device 3 detects the synchronization signal on the first beam, it is determined that it is currently the third transmission unit.

It should be noted here that the transmission unit is a time concept, which may be a symbol or a subframe. The restricted time-frequency resources include multiple transmission units in time and multiple frequency-domain resources in the frequency domain. In addition, the synchronization signal may only occupy part of the time domain resources of a certain transmission unit for transmission.

In another example, as shown in FIG. 6 , the synchronization signals on different beams are transmitted on the same transmission unit at different frequency positions.

S22, after obtaining the synchronization signal, the terminal device 3 establishes initial synchronization with the cell.

As shown in FIG. 7 , it is a structural diagram of a first embodiment of a base station device that executes the cell search method of the present invention.

As shown in FIG. 7 , in a preferred embodiment of the present invention, the base station device 2 includes at least one signal sending unit 200 .

The signal sending unit 200 is configured to transmit a signal, such as a synchronization signal, in the form of a beam based on a preset or notified design rule within a limited time-frequency resource location.

In a preferred embodiment of the present invention, the design rules may include the following two methods:

Method 1: Synchronous channel single transmission.

In this method, as shown in FIG. 4 , for a limited time-frequency resource location, the synchronization signal is transmitted only once on each beam, and the time-frequency location of the synchronization signal transmitted on each beam is fixed. Further, the beam also carries the transmitted sequence of synchronization signals. The sequences of synchronization signals transmitted on different beams may be the same or different.

Method 2: The synchronization channel is transmitted multiple times.

In this method, as shown in FIG. 5 , within a limited time-frequency resource location, the synchronization signal is transmitted multiple times on each beam, and the time-frequency location of the synchronization signal transmitted on each beam is fixed. Further, the beam also carries the transmitted sequence of synchronization signals. The sequences of synchronization signals transmitted on different beams may be the same or different. The synchronization signals sent on the same beam are different.

In a preferred embodiment of the present invention, the beams and the sequences transmitted on the beams have a certain correspondence. For example, the corresponding relationship is as follows:

It should be understood that the above table is only an exemplary correspondence. Based on the same principle, in the case of supporting more or less beam transmission, there will be different corresponding tables.

In a preferred embodiment of the present invention, the signal sending unit 200 is a program segment composed of computer program codes, which can be stored in a computer-readable storage medium, and includes several instructions for making a computer device (which can be It is a personal computer, a server, or a network device, etc.) or a processor to execute various embodiments of the present invention, such as all or part of the steps of the method shown in FIG. 2 .

As shown in FIG. 8 , it is a structural diagram of a first embodiment of a terminal device that executes the cell search method of the present invention.

As shown in FIG. 8 , in a preferred embodiment of the present invention, the terminal device 3 at least includes: a scanning unit 300 , an arithmetic unit 301 and a synchronization unit 302 .

The scanning unit 300 is configured to perform scanning within a working frequency band supported by the terminal device 3 when the terminal device 3 is powered on or needs to perform cell handover.

The computing unit 301 is configured to detect a synchronization channel on a supported frequency point, and when it is judged that the detected synchronization channel is transmitted in the form of a beam according to a preset or notified rule, according to the preset rules to obtain the synchronization signal.

In a preferred embodiment of the present invention, the preset rule may include that the time-frequency position of the synchronization signal transmitted on each beam is fixed, and the corresponding relationship between the beam and the synchronization signal transmitted on the beam.

In a preferred embodiment of the present invention, the terminal device 3 knows the preset rule in advance, that is, the time-frequency position of the transmission synchronization signal on each beam, and the correspondence between the beam and the transmission sequence.

When detecting the synchronization channel, the terminal device 3 acquires the information of the beam according to the synchronization sequence of the synchronization signal, and then acquires the synchronization signal at the fixed time-frequency position on the beam.

For example, according to the corresponding relationship in the above table, when the terminal device 3 detects the synchronization channel and finds that the received synchronization signal is the synchronization sequence 1, the terminal device 3 can determine that the synchronization signal of the cell is broadcast. When the terminal device 3 detects the synchronization channel and finds that the received synchronization signal is the synchronization sequence 2, the terminal device 3 determines that the transmission of the synchronization signal of the cell has the characteristics of a beam, and the The terminal device 3 can perform data interaction on the first beam to receive and transmit data.

In addition, the terminal device 3 knows in advance the time-frequency resource position of the transmission of the synchronization signal on each beam. In the example of FIG. 4 , the synchronization signals on different beams are transmitted on the same frequency resource and adjacent time resources. When the terminal device 3 detects the synchronization signal on the first beam, it is determined that it is currently the third transmission unit.

It should be noted here that the transmission unit is a time concept, which may be a symbol or a subframe. The restricted time-frequency resources include multiple transmission units in time and multiple frequency-domain resources in the frequency domain. In addition, the synchronization signal may only occupy part of the time domain resources of a certain transmission unit for transmission.

In another example, as shown in FIG. 6 , the synchronization signals on different beams are transmitted on the same transmission unit at different frequency positions.

The synchronization unit 302 is configured to establish initial synchronization with the cell after obtaining the synchronization signal.

In a preferred embodiment of the present invention, the scanning unit 300, the arithmetic unit 301 and the synchronization unit 302 are all program segments composed of computer program codes, which can be stored in a computer-readable storage medium, including a number of instructions for In order to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute various embodiments of the present invention, all or part of the steps of the method shown in FIG. 3 .

As shown in FIG. 9 , it is a schematic diagram of the hardware structure of the base station equipment for implementing the cell search method of the present invention.

As shown in FIG. 9 , the base station device 2 in the embodiment of the present invention includes at least one storage device 21 , at least one processing device 22 , at least one receiving device 23 , at least one sending device 24 , and at least one communication bus. Wherein, the communication bus is used to realize the connection and communication between these components.

Wherein, the receiving device 23 and the sending device 24 may be wired transmission ports, or may be wireless devices, such as including an antenna device, for performing data communication with other devices.

The processing device 22 can execute the operating system of the base station device 2 and various installed applications, program codes, etc., such as the signal sending unit 200 . The processing means 24 may include one or more microprocessors, digital processors.

Wherein, the receiving device 23 and the sending device 24 may be wired transmission ports, or may be wireless devices, such as including an antenna device, for performing data communication with other devices.

The processing device 22 can execute the operating system of the base station device 2 and various installed applications, program codes, etc., such as the signal sending unit 200 . The processing means 24 may include one or more microprocessors, digital processors.

Wherein, the receiving device 23 and the sending device 24 may be wired transmission ports, or may be wireless devices, such as including an antenna device, for performing data communication with other devices.

The processing device 22 can execute the operating system of the base station device 2 and various installed applications, program codes, etc., such as the signal sending unit 200 . The processing means 24 may include one or more microprocessors, digital processors.

The storage device 21 is used for storing program codes in the signal sending unit 200 . The storage device 21 may be a storage device such as a smart media card, a secure digital card, and a flash card.

Wherein, the receiving device 23 and the sending device 24 may be wired transmission ports, or may be wireless devices, such as including an antenna device, for performing data communication with other devices.

The processing device 22 can execute the operating system of the base station device 2 and various installed applications, program codes, etc., such as the signal sending unit 200 . The processing means 24 may include one or more microprocessors, digital processors.

Wherein, the receiving device 23 and the sending device 24 may be wired transmission ports, or may be wireless devices, such as including an antenna device, for performing data communication with other devices.

The processing device 22 can execute the operating system of the base station device 2 and various installed applications, program codes, etc., such as the signal sending unit 200 . The processing means 24 may include one or more microprocessors, digital processors.

The storage device 21 is used for storing program codes in the signal sending unit 200 . The storage device 21 may be a storage device such as a smart media card, a secure digital card, and a flash card.

In an embodiment of the present invention, when multiple instructions stored in the storage device 21 in the base station device 2 are executed by the processing device 24, the following can be achieved:

Within a limited time-frequency resource location, the synchronization signal is transmitted in the form of beams based on preset or notified design rules.

In a preferred embodiment of the present invention, the design rule includes: the time-frequency position of the synchronization signal transmitted on each beam is fixed.

In a preferred embodiment of the present invention, the design rule includes: the design rule includes: the synchronization signal carries the information of the beam, so that the beam and the synchronization signal transmitted on the beam have a corresponding relationship.

In a preferred embodiment of the present invention, within the limited time-frequency resource position, a synchronization signal is transmitted once on each beam.

In a preferred embodiment of the present invention, within the limited time-frequency resource location, synchronization signals are transmitted multiple times on each beam, and the synchronization signals sent on the same beam are different.

As shown in FIG. 10 , it is a structural diagram of a second embodiment of a terminal device for executing the cell search method of the present invention.

The terminal device 3 in the embodiment of the present invention may also be called user equipment (User Equipment, UE), and is used in a mobile communication network, including a mobile phone, an intelligent terminal, a multimedia device, a streaming media device, and the like.

As shown in FIG. 10, the terminal device 3 in this embodiment of the present invention includes: at least one memory 31, at least one processor 32, such as a CPU, at least one receiver 33, at least one transmitter 34, at least one display 35, at least one communication bus.

Wherein, the communication bus is used to realize the connection and communication between these components.

Wherein, the transmitter 34 and the receiver 33 may be wired transmission ports, or may be wireless devices, such as including an antenna device, for data communication with other devices.

The memory 31 may be a high-speed RAM memory, or a non-volatile memory (non-volatile memory), such as at least one disk memory.

The processor 32 can execute the operating system of the terminal device 3 and various installed applications, program codes, etc., such as the scanning unit 300 , the arithmetic unit 301 and the synchronization unit 302 . The processor 32 may include one or more microprocessors, digital processors.

The memory 31 stores program codes, and the processor 32 can call the program codes stored in the memory 31 through a communication bus to execute related functions.

The display 35 may be a touch screen or other devices for displaying pictures.

In an embodiment of the present invention, when multiple instructions stored in the memory 31 in the terminal device 3 are executed by the processor 32, the following can be achieved:

When the terminal device 3 is powered on or needs to perform cell handover, scan in the working frequency band supported by the terminal device 3;

A synchronization channel is detected on a supported frequency point, and when it is determined that the synchronization channel is transmitted in the form of a beam according to a preset or notified rule, the synchronization signal is acquired according to the preset rule. The preset rules include: the time-frequency position of the synchronization signal transmitted on each beam is fixed, and the corresponding relationship between the beam and the synchronization signal transmitted on the beam; and

After the synchronization signal is obtained, initial synchronization is established with the cell.

In a preferred embodiment of the present invention, the synchronization channel is detected on a supported frequency point, and when it is determined that the synchronization channel is transmitted in the form of a beam according to a preset or notified rule, the preset The rules for obtaining the synchronization signal include:

When the synchronization channel is detected, the information of the beam is obtained according to the synchronization sequence of the synchronization signal, and the synchronization signal at the fixed time-frequency position on the beam is obtained.

In the several embodiments provided by the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other division manners in actual implementation.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The unit described as a separate component may or may not be physically separated, and the component shown as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple networks plus software functions The form of the unit is realized.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and range of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim. Furthermore, it is clear that the word "comprising" does not exclude other units or steps and the singular does not exclude the plural. Several units or means recited in the system claims can also be realized by one unit or means by means of software or hardware. The terms first, second, etc. are used to denote names and do not denote any particular order.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A cell search method is applied to base station equipment, and is characterized by comprising the following steps:

in a limited time frequency resource position, based on a preset or informed design rule, transmitting a synchronization signal for multiple times in a beam form, where the synchronization signals transmitted on the same beam are different, where the design rule is known by a terminal, so that the terminal searches for the synchronization signal according to the design rule and establishes initial synchronization with a cell, where the design rule includes: the synchronization signal carries information of the beam, so that the beam and the synchronization signal transmitted on the beam have a corresponding relationship.

2. The cell search method of claim 1, wherein the design rule comprises: the time-frequency position of the synchronization signal transmitted on each beam is fixed.

3. A cell search method is applied to a terminal device, and is characterized in that the cell search method comprises the following steps:

when a terminal device is started or cell switching is needed, scanning is carried out in a working frequency band supported by the terminal device;

detecting a synchronous channel on a supported frequency point, and acquiring a synchronous signal according to a preset rule when judging that the synchronous channel is transmitted in a beam form according to the preset rule or a notified rule, wherein the preset rule comprises the following steps: the time-frequency position of the transmission synchronization signal on each wave beam is fixed, and the corresponding relation between the wave beam and the synchronization signal transmitted on the wave beam; and

after obtaining the synchronization signal, the initial synchronization is established with the cell.

4. The cell search method of claim 3, wherein the detecting the synchronization channel on the supported frequency points, and when it is determined according to a preset or notified rule that the synchronization channel is transmitted in the form of a beam, acquiring the synchronization signal according to the preset rule comprises:

and when the synchronous channel is detected, acquiring the information of the beam according to the synchronous sequence of the synchronous signal, and acquiring the synchronous signal of a fixed time-frequency position on the beam.

5. A base station apparatus, characterized in that the base station apparatus comprises:

a signal sending unit, configured to transmit, in a limited time-frequency resource location, a synchronization signal in a form of a beam for multiple times based on a preset or notified design rule, where the synchronization signal sent on the same beam is different, and the design rule is known by a terminal, so that the terminal searches for the synchronization signal according to the design rule and establishes initial synchronization with a cell, where the design rule includes: the synchronization signal carries information of the beam, so that the beam and the synchronization signal transmitted on the beam have a corresponding relationship.

6. The base station apparatus of claim 5, wherein the design rule includes: the time-frequency position of the synchronization signal transmitted on each beam is fixed.

7. A terminal device, characterized in that the terminal device comprises:

the scanning unit is used for scanning in a working frequency band supported by the terminal equipment when the terminal equipment is started or cell switching is required;

the device comprises an operation unit and a control unit, wherein the operation unit is used for detecting a synchronous channel on a supported frequency point, and acquiring a synchronous signal according to a preset rule when judging that the synchronous channel is transmitted in a beam form according to the preset rule or a notification rule, and the preset rule comprises: the time-frequency position of the transmission synchronization signal on each wave beam is fixed, and the corresponding relation between the wave beam and the synchronization signal transmitted on the wave beam; and

and the synchronization unit is used for establishing initial synchronization with the cell after acquiring the synchronization signal.

8. The terminal device of claim 7, wherein the detecting a synchronization channel on a supported frequency point, and when it is determined according to a preset or notified rule that the synchronization channel is transmitted in a beam form, acquiring the synchronization signal according to the preset rule comprises:

and when the synchronous channel is detected, acquiring the information of the beam according to the synchronous sequence of the synchronous signal, and acquiring the synchronous signal of a fixed time-frequency position on the beam.

9. A cell search system, the cell search system comprising:

a base station device and a terminal device; wherein:

the base station equipment transmits a synchronization signal for multiple times in a limited time frequency resource position in a wave beam form, and the synchronization signals transmitted on the same wave beam are different, wherein the synchronization signals have a certain design rule on the wave beam;

the terminal device knows a design rule of the synchronization signal on the beam in advance, and knows a time-frequency resource position of the synchronization signal transmitted on the beam according to the design rule to obtain the synchronization signal and establish synchronization, wherein the design rule comprises: the synchronization signal carries information of the beam, so that the beam and the synchronization signal transmitted on the beam have a corresponding relationship.

10. The cell search system of claim 9, wherein the design rules comprise: the time-frequency position of the synchronization signal transmitted on each beam is fixed.

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