CN106658614B - Cell search method, device and system - Google Patents
Cell search method, device and system Download PDFInfo
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- CN106658614B CN106658614B CN201610908786.6A CN201610908786A CN106658614B CN 106658614 B CN106658614 B CN 106658614B CN 201610908786 A CN201610908786 A CN 201610908786A CN 106658614 B CN106658614 B CN 106658614B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
- H04J11/0086—Search parameters, e.g. search strategy, accumulation length, range of search, thresholds
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
Abstract
A cell search method is applied to base station equipment, and is characterized by comprising the following steps: and transmitting the synchronization signals in the form of beams in a limited time frequency resource position based on preset or informed design rules. The invention also provides terminal equipment and a system for realizing the cell search method. The invention can enable the terminal equipment to timely and accurately search the target service cell, and is particularly suitable for the service cell working on high frequency points.
Description
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a cell search method, device, and system.
Background
The conventional LTE system generally works at a lower frequency point, so that the propagation characteristics of the channel are better, and the base station can send a synchronization signal to the terminal within the coverage of the whole serving cell. In consideration of the fact that the resources of the low frequency band are more efficient in the subsequent mobile communication system, it may be necessary to operate in the higher frequency band. In a higher frequency band, due to the propagation characteristics of high frequencies, the attenuation of signals is relatively severe, and therefore, the coverage of a cell cannot be guaranteed.
Disclosure of Invention
In view of the above, it is necessary to provide a cell search method, which enables a terminal device to timely and accurately search a target serving cell, and is particularly suitable for serving cells working at high frequency points.
A cell search method is applied to base station equipment and comprises the following steps:
and transmitting the synchronization signals in a wave beam form in a limited time frequency resource position based on a preset or informed design rule, wherein the design rule is known by a terminal, so that the terminal searches the synchronization signals according to the design rule and establishes initial synchronization with a 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 information of the beam, so that the beam and the synchronization signal transmitted on the beam have a corresponding relationship.
In the preferred embodiment of the present invention, a synchronization signal is transmitted once on each beam within the restricted time-frequency resource location.
In the preferred embodiment of the present invention, in the limited time-frequency resource location, each beam transmits a synchronization signal for multiple times, and the synchronization signals transmitted on the same beam are different.
A cell search method is applied to terminal equipment and 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 synchronization channel on a supported frequency point, and acquiring the synchronization signal according to a preset rule when judging that the synchronization channel is transmitted in a beam form according to the preset rule or a notified rule, wherein 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
after obtaining the synchronization signal, the initial synchronization is established with the cell.
In a preferred embodiment of the present invention, 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 includes:
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.
In view of the above, it is further necessary to provide a base station device, which enables a terminal device to timely and accurately search a target serving cell, and is particularly suitable for serving cells operating at high frequency points.
In a base station apparatus, comprising:
and the signal sending unit is used for transmitting the synchronization signal in a wave beam form in a limited time frequency resource position based on a preset or informed design rule, wherein the design rule is known by the terminal, so that the terminal searches the 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 information of the beam, so that the beam and the synchronization signal transmitted on the beam have a corresponding relationship.
In the preferred embodiment of the present invention, a synchronization signal is transmitted once on each beam within the restricted time-frequency resource location.
In the preferred embodiment of the present invention, in the limited time-frequency resource location, each beam transmits a synchronization signal for multiple times, and the synchronization signals transmitted on the same beam are different.
In view of the above, it is further necessary to provide a terminal device, which can timely and accurately search a target serving cell, and is particularly suitable for serving cells working at high frequency points.
In a terminal device, comprising:
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 the 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.
In a preferred embodiment of the present invention, 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 includes:
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.
In view of the above, it is further necessary to provide a cell search method and system, which enable a terminal device to timely and accurately search a target serving cell, and are particularly suitable for serving cells working at high frequency points.
A cell search system, comprising:
a base station device and a terminal device; wherein:
the base station equipment transmits a synchronization signal in a limited time-frequency resource position in a wave beam form, wherein the synchronization signal has a certain design rule on the wave beam;
the terminal device knows the design rule of the synchronization signal on the wave beam in advance, and knows the time-frequency resource position of the synchronization signal transmitted on the wave 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 information of the beam, so that the beam and the synchronization signal transmitted on the beam have a corresponding relationship.
In the preferred embodiment of the present invention, a synchronization signal is transmitted once on each beam within the restricted time-frequency resource location.
In the preferred embodiment of the present invention, in the limited time-frequency resource location, each beam transmits a synchronization signal for multiple times, and the synchronization signals transmitted on the same beam are different.
The cell searching method, the device and the system can enable the terminal device to timely and accurately search the target service cell, are particularly suitable for the service cell working on high frequency points, and can ensure the coverage of the cell.
Drawings
Fig. 1 is a diagram illustrating a system architecture for performing a preferred embodiment of the cell search method of the present invention.
Fig. 2 is a flowchart of a method for signal transmission performed by a base station device in the cell search method according to the present invention.
Fig. 3 is a flowchart of a method for signal search performed by a terminal device in the cell search method according to the present invention.
Fig. 4 is a diagram illustrating a first preferred embodiment of signal transmission according to the present invention.
Fig. 5 is a diagram illustrating a second preferred embodiment of signal transmission according to the present invention.
Fig. 6 is a diagram illustrating a signal transmission according to a third preferred embodiment of the present invention.
Fig. 7 is a block diagram showing a first embodiment of a base station apparatus for performing the cell search method according to the present invention.
Fig. 8 is a block diagram illustrating a first embodiment of a terminal device for performing the cell search method according to the present invention.
Fig. 9 is a block diagram showing a second embodiment of a base station apparatus for performing the cell search method according to the present invention.
Fig. 10 is a block diagram showing a second embodiment of a terminal device for performing the cell search method according to the present invention.
Description of the main elements
Receiving device 23
Transmitting device 24
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a diagram illustrating a system architecture for implementing the preferred embodiment of the cell search method of the present invention.
In the 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 may perform connection communication 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 Wideband Code Division Multiple Access (WCDMA) network, a Frequency Division Multiple Access (Frequency Division Multiple Access) network, an Orthogonal Frequency Division Multiple Access (OFDMA) network, an SC-FDMA network, a General Packet Radio Service (GPRS) network, a Long Term Evolution (Long Term Evolution, LTE) network, and other such types of communication networks.
The base station equipment (allocations of base station)2 refers to a radio transceiver station for information transfer between a mobile communication switching center and the terminal equipment 3 in a certain radio coverage area.
Typically, one base station apparatus 2 includes three sectors. The base station device 2 may transmit a signal in a certain direction in each sector, and cover a certain range. For example, in a general case, in three sectors of one base station device 2, one sector antenna is aligned to the north direction, the coverage range is 120 degrees, another sector is aligned to the south-east direction, the coverage range is 120 degrees, another sector is aligned to the south-west direction, and the coverage range is 120 degrees, so that the three sectors can perform 360-degree full coverage on the periphery of the base station device 2. Generally, one sector corresponds to one cell, but a plurality of sectors may be combined into one cell.
In the preferred embodiment of the present invention, the terminal device 3 may also be referred to as a 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.
In the application of the mobile communication system, after the terminal device 3 is powered on, it needs to search a suitable cell (e.g. the cell with the largest measured power), and then achieve the synchronization of time slot and frequency with this cell, and can obtain the detailed information of this cell by reading the system information. The terminal device 3 can only use the services of the mobile network after logging in to the cell. The process from power-on search to login to a suitable cell of the terminal device 3 is generally defined as a cell initial search (initial search) process. Synchronization is a key step in cell initial search, and refers to the process from power-on to time and frequency synchronization with the cell of the terminal device 3.
Conventionally, the base station device 2 transmits a synchronization signal in a broadcast manner to the entire coverage area of the cell included therein, and therefore, the signal is generally propagated on a channel of a lower frequency point with good propagation characteristics. At higher frequency points, due to the propagation characteristic of high frequency, the attenuation of the signal is relatively severe, so that the signal may not ensure the coverage of the whole cell.
Unlike the traditional way in which the synchronization signal is broadcast to all cells, in the preferred embodiment of the present invention, the base station device 2 transmits the synchronization signal in the form of a beam within a limited time-frequency resource location, and it should be noted that the base station may transmit different beams covering different parts of a cell at different times. Wherein the synchronization signal has a certain design rule on the beam.
In the 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 sequence of the transmitted synchronization signal. The sequence of synchronization signals transmitted on different beams may be the same or different.
In the preferred embodiment of the present invention, the synchronization signal may be transmitted only once on each beam within the restricted time-frequency resource location.
In another preferred embodiment of the present invention, in the limited time-frequency resource location, each beam may transmit a synchronization signal for multiple times, and the synchronization signals transmitted 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 time-frequency resource position of the synchronization signal transmitted on each beam according to the design rule to obtain the synchronization signal and establish synchronization. Or the design rule is notified to the terminal in advance.
Fig. 2 is a flowchart of a method for signal transmission performed by the base station device 2 in the cell search method according to the present invention.
S10, the base station device 2 transmits signals, such as synchronization signals, in a beam form within a limited time-frequency resource location based on a preset or informed design rule.
In the preferred embodiment of the present invention, the design rule may include the following two methods:
the method comprises the following steps: the synchronization channel is transmitted a single time.
In this method, referring to fig. 4, the synchronization signal is transmitted only once on each beam for a restricted time-frequency resource location, and the time-frequency location where the synchronization signal is transmitted on each beam is fixed. Further, the beam also carries the sequence of the transmitted synchronization signal. The sequence of synchronization signals transmitted on different beams may be the same or different.
The method 2 comprises the following steps: the synchronization channel is transmitted multiple times.
In this method, referring to fig. 5, the synchronization signal is transmitted on each beam multiple times for a restricted time-frequency resource location, and the time-frequency location where the synchronization signal is transmitted on each beam is fixed. Further, the beam also transmits the sequence of the synchronization signal. The sequence of synchronization signals transmitted on different beams may be the same or different. The synchronization signals transmitted 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 relation. For example, the correspondence is as follows:
it should be understood that the above table is merely an exemplary correspondence. Based on the same principle, there are different tables of the corresponding relationship in the case of supporting more or less beam transmission.
Fig. 3 is a flowchart of a signal searching method executed by a terminal device in the cell searching method according to the present invention.
The order of the steps in the flow chart may be changed and some steps may be omitted according to different needs.
S20, when the terminal device 3 is powered on or needs to perform cell switching, scanning 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 signal according to a preset rule when it is determined that the synchronization channel is transmitted in a beam form according to the preset or notified rule.
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 the preferred embodiment of the present invention, the terminal device 3 knows the preset rule in advance.
The terminal device 3 acquires information of a beam according to a synchronization sequence of a synchronization signal when detecting a synchronization channel, and further acquires a synchronization signal of a fixed time-frequency position on the beam.
For example, according to the corresponding relationship in the above table, when the terminal device 3 finds that the received synchronization signal is synchronization sequence 1 when detecting the synchronization channel, the terminal device 3 may determine that the synchronization signal of the cell is transmitted in a broadcast manner; when the terminal device 3 finds that the received synchronization signal is the synchronization sequence 2 when detecting the synchronization channel, the terminal device 3 determines that the transmission of the synchronization signal of the cell is characterized by a beam, and the terminal device 3 may perform data interaction on the first beam to receive and transmit data.
Furthermore, the terminal device 3 knows in advance the time-frequency resource location of the transmission of the synchronization signal on each beam. As in the example of fig. 4, the synchronization signals on different beams are transmitted on the same frequency resource, 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 that a transmission unit is a concept of time, and may be a symbol or a subframe. The limited time frequency resource comprises a plurality of transmission units in time, and the frequency domain comprises a plurality of frequency domain resources. In addition, the synchronization signal may only occupy a portion of the time domain resource of a certain transmission unit for transmission.
In another example, as shown in fig. 6, synchronization signals on different beams are transmitted on different frequency locations on the same transmission unit.
S22, the terminal device 3 establishes initial synchronization with the cell after obtaining the synchronization signal.
Fig. 7 is a block diagram of a base station device according to a first embodiment of the cell search method of the present invention.
As shown in fig. 7, in the preferred embodiment of the present invention, the base station apparatus 2 includes at least one signal transmitting unit 200.
The signal transmitting unit 200 is configured to transmit a signal, such as a synchronization signal, in a limited time-frequency resource location in a beam form based on a preset or notified design rule.
In the preferred embodiment of the present invention, the design rule may include the following two methods:
the method comprises the following steps: the synchronization channel is transmitted a single time.
In this method, referring to fig. 4, the synchronization signal is transmitted only once on each beam for a restricted time-frequency resource location, and the time-frequency location where the synchronization signal is transmitted on each beam is fixed. Further, the beam also carries the sequence of the transmitted synchronization signal. The sequence of synchronization signals transmitted on different beams may be the same or different.
The method 2 comprises the following steps: the synchronization channel is transmitted multiple times.
In this method, referring to fig. 5, the synchronization signal is transmitted on each beam multiple times for a restricted time-frequency resource location, and the time-frequency location where the synchronization signal is transmitted on each beam is fixed. Further, the beam also carries the sequence of the transmitted synchronization signal. The sequence of synchronization signals transmitted on different beams may be the same or different. The synchronization signals transmitted on the same beam are different.
In a preferred embodiment of the present invention, the beam and the sequence transmitted on the beam have a certain correspondence. For example, the correspondence is as follows:
it should be understood that the above table is merely an exemplary correspondence. Based on the same principle, there are different tables of the corresponding relationship in the case of supporting more or less beam transmission.
In the 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 instructions for causing a computer device (which can be a personal computer, a server, or a network device) or a processor (processor) to execute all or part of the steps of the method shown in fig. 2.
Fig. 8 is a block diagram of a terminal device according to a first embodiment of the cell search method of the present invention.
As shown in fig. 8, in the 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 scan 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 operation unit 301 is configured to detect a synchronization channel on a supported frequency point, and acquire the synchronization signal according to a preset rule when it is determined that the detected synchronization channel is transmitted in a beam form according to the preset or notified rule.
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.
The terminal device 3 acquires information of a beam according to a synchronization sequence of a synchronization signal when detecting a synchronization channel, and further acquires a synchronization signal of a fixed time-frequency position on the beam.
For example, according to the corresponding relationship in the above table, when the terminal device 3 finds that the received synchronization signal is synchronization sequence 1 when detecting the synchronization channel, the terminal device 3 may determine that the synchronization signal of the cell is transmitted in a broadcast manner; when the terminal device 3 finds that the received synchronization signal is the synchronization sequence 2 when detecting the synchronization channel, the terminal device 3 determines that the transmission of the synchronization signal of the cell is characterized by a beam, and the terminal device 3 may perform data interaction on the first beam to receive and transmit data.
Furthermore, the terminal device 3 knows in advance the time-frequency resource location of the transmission of the synchronization signal on each beam. As in the example of fig. 4, the synchronization signals on different beams are transmitted on the same frequency resource, 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 that a transmission unit is a concept of time, and may be a symbol or a subframe. The limited time frequency resource comprises a plurality of transmission units in time, and the frequency domain comprises a plurality of frequency domain resources. In addition, the synchronization signal may only occupy a portion of the time domain resource of a certain transmission unit for transmission.
In another example, as shown in fig. 6, synchronization signals on different beams are transmitted on different frequency locations on the same transmission unit.
The synchronization unit 302 is configured to establish initial synchronization with a cell after acquiring a synchronization signal.
In the preferred embodiment of the present invention, the scanning unit 300, the operation 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 and include instructions for causing a computer device (such as a personal computer, a server, or a network device) or a processor (processor) to execute all or part of the steps of the method shown in fig. 3 according to the embodiments of the present invention.
Fig. 9 is a schematic diagram of a hardware structure of a base station device for implementing the cell search method according to the present invention.
As shown in fig. 9, the base station apparatus 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 transmitting device 24, and at least one communication bus. Wherein the communication bus is used for realizing connection communication among the components.
The receiving device 23 and the transmitting device 24 may be wired transmitting ports, or may be wireless devices, for example, including antenna devices, for performing data communication with other devices.
The processing means 22 may execute an operating system of the base station device 2 and various types of applications, program codes, etc. installed, such as the signal transmission unit 200. The processing means 24 may comprise one or more microprocessors, digital processors.
The receiving device 23 and the transmitting device 24 may be wired transmitting ports, or may be wireless devices, for example, including antenna devices, for performing data communication with other devices.
The processing means 22 may execute an operating system of the base station device 2 and various types of applications, program codes, etc. installed, such as the signal transmission unit 200. The processing means 24 may comprise one or more microprocessors, digital processors.
The receiving device 23 and the transmitting device 24 may be wired transmitting ports, or may be wireless devices, for example, including antenna devices, for performing data communication with other devices.
The processing means 22 may execute an operating system of the base station device 2 and various types of applications, program codes, etc. installed, such as the signal transmission unit 200. The processing means 24 may comprise one or more microprocessors, digital processors.
The storage means 21 is used for storing the program code in the signal transmitting unit 200. The storage device 21 may be a smart media card (smart media card), a secure digital card (secure digital card), a flash memory card (flash card), or other storage devices.
The receiving device 23 and the transmitting device 24 may be wired transmitting ports, or may be wireless devices, for example, including antenna devices, for performing data communication with other devices.
The processing means 22 may execute an operating system of the base station device 2 and various types of applications, program codes, etc. installed, such as the signal transmission unit 200. The processing means 24 may comprise one or more microprocessors, digital processors.
The receiving device 23 and the transmitting device 24 may be wired transmitting ports, or may be wireless devices, for example, including antenna devices, for performing data communication with other devices.
The processing means 22 may execute an operating system of the base station device 2 and various types of applications, program codes, etc. installed, such as the signal transmission unit 200. The processing means 24 may comprise one or more microprocessors, digital processors.
The storage means 21 is used for storing the program code in the signal transmitting unit 200. The storage device 21 may be a smart media card (smart media card), a secure digital card (secure digital card), a flash memory card (flash card), or other storage devices.
In one embodiment of the present invention, when the plurality of instructions stored by the storage means 21 in the base station device 2 are executed by the processing means 24, it is possible to implement:
and transmitting the synchronization signals in the form of beams in a limited time frequency resource position based on preset or informed 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 information of the beam, so that the beam and the synchronization signal transmitted on the beam have a corresponding relationship.
In the preferred embodiment of the present invention, a synchronization signal is transmitted once on each beam within the restricted time-frequency resource location.
In the preferred embodiment of the present invention, in the limited time-frequency resource location, each beam transmits a synchronization signal for multiple times, and the synchronization signals transmitted on the same beam are different.
As shown in fig. 10, a block diagram of a terminal device for executing the cell search method according to the second embodiment of the present invention is shown.
The terminal device 3 in the embodiment of the present invention may also be referred to as a 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 the embodiment of the present invention includes: at least one memory 31, at least one processor 32, e.g. 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 for realizing connection communication among the components.
The transmitter 34 and the receiver 33 may be wired transmission ports, or may be wireless devices, for example, including antenna devices, for performing data communication with other devices.
The memory 31 may be a high-speed RAM memory, or may be a non-volatile memory (non-volatile memory), such as at least one disk memory.
The processor 32 may execute an operating system of the terminal device 3 and various types of applications, program codes, and the like installed, 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 has program code stored therein, and the processor 32 can call the program code stored in the memory 31 through a communication bus to perform related functions.
The display 35 may be a touch screen or other device for displaying pictures.
In one embodiment of the present invention, the plurality of instructions stored by the memory 31 in the terminal device 3, when executed by the processor 32, may implement:
when a terminal device 3 is started or cell switching is required, scanning is performed in a working frequency band supported by the terminal device 3;
detecting a synchronization channel on a supported frequency point, and acquiring the synchronization signal according to a preset rule when judging that the synchronization channel is transmitted in a beam form according to the preset rule or a notified rule, wherein 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
after obtaining the synchronization signal, the initial synchronization is established with the cell.
In a preferred embodiment of the present invention, 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 includes:
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.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may also be implemented in a form of being distributed to a plurality of networks and software functional units.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims shall not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the system claims may also be implemented by one unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention 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.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610908786.6A CN106658614B (en) | 2016-10-18 | 2016-10-18 | Cell search method, device and system |
| PCT/CN2016/113416 WO2018072331A1 (en) | 2016-10-18 | 2016-12-30 | Cell search method, apparatus and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610908786.6A CN106658614B (en) | 2016-10-18 | 2016-10-18 | Cell search method, device and system |
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|---|---|---|---|---|
| CN101212246A (en) * | 2006-12-31 | 2008-07-02 | 深圳Tcl工业研究院有限公司 | Method for capturing downlink pilot time slot |
| CN105493547A (en) * | 2013-08-20 | 2016-04-13 | 株式会社Ntt都科摩 | Synchronization signal transmission method and base station device |
| CN105637952A (en) * | 2014-09-24 | 2016-06-01 | 联发科技股份有限公司 | Synchronization in a beamforming system |
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| WO2013024852A1 (en) * | 2011-08-15 | 2013-02-21 | 株式会社エヌ・ティ・ティ・ドコモ | Wireless base station, user terminal, wireless communication system, and wireless communication method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212246A (en) * | 2006-12-31 | 2008-07-02 | 深圳Tcl工业研究院有限公司 | Method for capturing downlink pilot time slot |
| CN105493547A (en) * | 2013-08-20 | 2016-04-13 | 株式会社Ntt都科摩 | Synchronization signal transmission method and base station device |
| CN105637952A (en) * | 2014-09-24 | 2016-06-01 | 联发科技股份有限公司 | Synchronization in a beamforming system |
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